JP2013189943A - Engine working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine working machine for improving usability by surely preventing a malfunction, in engine starting operation of using a decompressor and a starter.SOLUTION: An engine working machine 1 is driven by an engine 10, and includes a starter 76 driven by electric power supplied from a battery 80 and starting the engine 10, a decompressor 30 for extracting a part of the compression of the engine 10, and a lighting means for displaying an operation state of the decompressor 30, and is constituted so as to indicate the operation state of the decompressor 30 by a lighting state and so as not to rotate the starter 76 in a state of not operating the decompressor 30. A switch circuit is arranged for connecting a power source supply passage to the starter 76 when the decompressor 30 is turned on.

Description

  The present invention relates to an engine work machine such as a chain saw or a brush cutter, and more particularly to an engine work machine that starts by driving a cell motor using a small battery.

  In small working machines such as brush cutters and chain saws, small engines are widely used as power sources. FIG. 9 is an external view of a brush cutter as an example of a conventional engine working machine 1001. As shown in FIG. 9, an engine work machine 1001 equipped with a small two-cycle engine passes a drive shaft (not shown) through a pipe-shaped main pipe 1004, and this drive shaft is provided at one end of the main pipe 1004. , The rotary blade 1012 provided at the other end of the main pipe 1004 is rotated. In the vicinity of the rotary blade 1012, a scattering protection cover 1013 for preventing scattering of the grass that has been cut off is provided. The engine work machine 1001 is carried by a shoulder strap (not shown) or the like, and a handle 1008 having a substantially U-shape in front view for operation by an operator is attached to the vicinity of the central portion of the main pipe 1004. The number of revolutions of the engine 1010 is controlled by an operator by a throttle lever 1007 (not shown) attached to the grip unit 1009. The operation of the throttle lever is transmitted to the carburetor of the engine 1010 through the wire 1045.

  The engine 1010 used in the engine work machine 1001 is a general-purpose engine that is small and light and can obtain a large output, and can work for a long time by supplying fuel. A manual starter is used to start the engine 1010, and various ideas for improving startability have been proposed. For example, Patent Document 1 proposes an engine work machine in which a battery and a cell motor are built in and startability is improved by the cell motor.

Japanese Patent No. 3400191

  In the engine working machine of patent document 1, if the battery of a magnitude | size large enough to drive a cell motor is mounted, the portability of an engine working machine will be deteriorated. Although it is conceivable to install a small battery with a small battery capacity as a countermeasure, if the cell motor is downsized to match the battery capacity, there is a risk that the motor will not have sufficient driving force to start the engine and cannot be started stably. There is. On the other hand, when the output of the cell motor is selected in order to start the engine reliably, the cell motor becomes large and becomes a factor that deteriorates the portability of the engine working machine. Some general-purpose engines are equipped with a decompression mechanism to facilitate the initial rotation when the engine is started. The load is applied, leading to a decrease in the service life.

  The present invention has been made in view of the above background, and its purpose is to enable an operator to easily visually check the operation state of the decompressor in the engine starting operation using the decompressor and the cell motor, and to reliably prevent malfunction. To provide an engine work machine with improved usability.

  Another object of the present invention is to provide an engine working machine that is configured so that a cell motor does not rotate unless a decompressor is operated, and can efficiently start the engine with a small motor.

  Still another object of the present invention is to provide an engine working machine in which connection by components such as a gear connecting a cell motor and a crankshaft can be easily separated by a switching lever.

  The characteristics of representative ones of the inventions disclosed in the present application will be described as follows.

  According to one aspect of the present invention, an engine working machine driven by an engine, which is driven by electric power supplied from a battery and starts the engine, a cell motor switch for driving the cell motor, and compression of the engine A decompressor for removing a part of the cell motor is provided, and when the decompressor is not activated, the cell motor does not rotate even if the cell motor switch is operated. In addition, a switch circuit is provided for connecting a power supply path to the cell motor when the decompressor is turned on. It has a detecting means for detecting the operation state of the decompressor, and performs control to connect / cut off the power supply path to the cell motor in accordance with the on / off state of the decompressor. In addition, lighting means for displaying the operating state of the decompressor is provided.

  According to another feature of the invention, the power switch for stopping the engine is provided. When the power switch is turned on, the lighting means is lit in the first display mode, and when the decompression is turned on, the lighting means is the second display. It was made to light in a manner. The lighting means is a light emitting diode, and the first display mode and the second display mode are, for example, lighting in different colors. The engine is a two-cycle engine having a crankcase and a cylinder fixed to the crankcase, and the decompressor is provided in the cylinder. The cylinder portion of the engine is covered with a cylinder cover, the decompression operation button is exposed to the outside through a hole formed in the cover, and the lighting means is provided on the cylinder cover in the vicinity of the operation button.

  According to still another aspect of the present invention, power transmission means from the cell motor to the crankshaft of the engine, and switching means for mechanically switching between a connected state and a cutoff state of the power transmission means are provided. The power transmission means includes a gear on the cell motor side, a gear on the crankshaft side, and a movable pinion that is interposed between these gears and transmits the rotational force of the cell motor to the crankshaft side. It is configured to be movable in the axial direction of the shaft that supports the movable pinion, and is held in two positions, a position that meshes with both the gear on the cell motor side and the gear on the crankshaft side, and a position that does not mesh with either. The

According to the first aspect of the present invention, the decompression switch for operating the decompression is provided, and in a situation where the decompression is not activated, the cell motor is not rotated even if the cell motor switch is operated.
According to the invention of claim 2, since the switch circuit for connecting the power supply path to the cell motor is provided when the decompressor is turned on, the decompression-linked cell switch mechanism can be realized with a simple configuration.
According to the invention of claim 3, since the detection means for detecting the operation state of the decompressor is provided and the control to connect / cut off the power supply path to the cell motor according to the on / off state of the decompressor is performed, the decompressor is operating. In such a situation, the cell motor does not rotate, so that it is possible to prevent the operator from forgetting to operate the decompression unit.
According to invention of Claim 4, since the lighting means which displays the operation state of a decompressor was provided, it can be visually recognized easily that the decompressor is an OFF state by a lighting condition.
According to the fifth aspect of the present invention, the display device displays the power switch on and the decompression on in different display modes, so that the operator can immediately recognize the respective states.
According to the invention of claim 6, since the lighting means is a light emitting diode and the first display mode and the second display mode are lighting in different colors, the operator can turn on / off the power switch depending on the display color. And the decompression operation status can be visually confirmed.

According to the seventh aspect of the present invention, the engine is a two-cycle engine, and the decompression unit is provided in the cylinder. Therefore, the decompression mechanism having a simple structure can be realized at a low manufacturing cost.
According to the invention of claim 8, since the operation button of the decompression is exposed to the outside through the hole formed in the cover, and the lighting means is provided on the cylinder cover in the vicinity of the operation button, a convenient decompression button can be realized. The operator can easily identify the operation state of the decompression by the lighting means.
According to the invention of claim 9, since the switching means for separating the cell motor is provided in the power transmission means from the cell motor to the crankshaft of the engine, the power to the cell motor is used when a manual starter such as a recoil starter is used. Since the transmission connection can be disconnected, an increase in the pulling load of the starter handle due to the addition of the cell motor can be prevented.
According to the invention of claim 10, since the movable pinion is interposed between the gear on the cell motor side and the gear on the crankshaft side in the power transmission means, the power transmission is surely cut off when the cell motor is not used. I can leave.

  The above and other objects and novel features of the present invention will become apparent from the following description and drawings.

It is a longitudinal section showing the internal structure of engine working machine 1 concerning the example of the present invention. It is a rear view of the engine working machine 1 which concerns on the Example of this invention. It is sectional drawing of the AA part of FIG. It is a flowchart which shows the starting procedure of the engine working machine 1 which concerns on the Example of this invention. It is a longitudinal cross-sectional view which shows the internal structure of the engine working machine 101 which concerns on the 2nd Example of this invention. It is a figure which shows the shape of the decompression button of the engine working machine 101 which concerns on 2nd Example of this invention. FIG. 6 is a cross-sectional view taken along a line BB in FIG. 5, illustrating a state when the cell motor is used in the engine working machine 101 according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line BB in FIG. 5, illustrating a state when the cell motor is disconnected in the engine work machine 101 according to the second embodiment of the present invention. It is a perspective view which shows an example (brusher) of the conventional engine working machine 1001. FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same portions are denoted by the same reference numerals, and repeated description is omitted. Further, in this specification, description will be made assuming that the front, rear, left, right, and up and down directions are directions shown in the drawing.

  FIG. 1 is a longitudinal sectional view showing the internal structure of the engine working machine 1 according to this embodiment. The engine 10 is a two-cycle small engine, the crankshaft 13 is disposed coaxially with the main pipe 1004 (see FIG. 9), and the cylinder 11 is disposed so as to extend substantially upward in the vertical direction from the crankcase 14, The piston 12 reciprocates in the cylinder 11 in the vertical direction. The high-voltage current generated by the ignition coil 23 is transmitted to the spark plug 25 through the ignition cord 24 and the plug cap 25a. A fuel tank 27 is provided below the crankcase 14 of the engine 10. The fuel tank 27 contains a mixed oil of gasoline and oil for two cycles, and is sent to a vaporizer 35 described later.

  One end of a drive shaft (not shown) is connected to the front side (output side) of the crankshaft 13 via a clutch shaft 32 via a centrifugal clutch 29. The magnet rotor 22 to which the centrifugal clutch 29 is attached is integrally formed with engine cooling fins. The centrifugal clutch 29 is a known centrifugal clutch in which the oscillator 30a is connected to the clutch drum 30b by centrifugal force when the rotation speed of the crankshaft 13 becomes equal to or higher than a certain value. The clutch shaft 32 is rotatably held by a bearing 33 held by a housing 34.

  A decompressor 31 is provided at a position adjacent to the combustion chamber of the cylinder 11 (a side surface of the cylinder 11 in FIG. 1). The decompression 31 is a decompression mechanism, and is a mechanism for releasing part of the pressure in the combustion chamber when the engine 10 is started to facilitate the compression work by the piston 12 and making the engine 10 easier to start. In this embodiment, a decompression button 31a, which is an operation unit (operation button) for operating the decompression 31, is provided at the distal end of the decompression 31, and the decompression button 31a is pushed in (the decompression button 31a is moved from the rear to the front). Thus, a part of the pressure in the cylinder 11 can be released. When the first combustion (first explosion) immediately after the rotation of the crankshaft 13 occurs, the decompression 31 automatically returns due to the pressure fluctuation. The decompression button 31a is formed with an annular flange portion 31b whose diameter is increased, and a lever 64 for operating the switch 63 is provided on a part of the flange portion 31b.

  The switch 63 is operated by releasing the plunger of the switch 63 from the pressing by the lever 64 when the decompression button 31a is pushed and the lever 64 fixed to the flange portion 31b moves forward. It serves as a detecting means for detecting the operating state. When the switch 63 is activated, the cell switch 71 which is a cell motor switch is turned on, and the cell motor 76 can be driven by pushing the cell switch 71. When the engine detonates for the first time, the decompression button 31a returns to the original position, and the pressure by the lever 64 is applied to the plunger of the switch 63, so that the cell switch 71 is short-circuited. As a result, it is possible to prevent the cell starter from being driven by an erroneous operation during engine startup. Since the control board 62 is arranged in the vicinity of the cylinder 11, all electronic components that are vulnerable to heat are arranged on the board 85, and only the switch 63 that conducts and short-circuits the cell switch 71 is provided on the control board 62. It is arranged.

  As a starting device of the present embodiment, two systems of a cell motor 76 and a recoil starter 40 are provided. The cell motor 76 is rotated by electric power supplied from a switch circuit that connects a power supply path such as the power supply line 52, and the pinion 57 provided on the rotating shaft 76a rotates to rotate the gear 49. The gear 49 is held by a bearing 48 so as to be rotatable relative to the crankshaft 13. When the gear 49 rotates at a high speed, the one-way clutch 50 attached to a part of the gear 49 protrudes radially outward by centrifugal force. Thus, the crankshaft 13 is rotated by rotating the first drum 51 in close contact with the first drum 51. The recoil starter 40 is rotated at a high speed by pulling a starter rope 42 wound around a reel 41 with a starter handle 36 (see FIG. 2 described later), and the one-way clutch 46 protrudes radially outward by centrifugal force. The second drum 47 is rotated in close contact with the drum 47. Since the second drum 47 is fixed to the crankshaft 13, when the second drum 47 rotates, the crankshaft 13 also rotates and the engine can be started. The released starter rope 42 is wound around the reel 41 by the restoring force of the spiral spring 43.

When the recoil starter 40 which is a manual type of the starter is used, the gear 49 is connected to the crankshaft 13 by the bearing 48, so that the crankshaft 13 can be driven via the one-way clutch 46. When the crankshaft 13 rotates via the one-way clutch 46, the gear 49 is configured to idle, and the cell motor 76 is not rotated simultaneously, so that an increase in pulling load can be prevented. became. On the other hand, when driving the cell motor 76 which is an automatic type of the starter, the gear 49 is configured to drive the crankshaft 13 via the one-way clutch 50, and this configuration has no problem in practical use.

  The battery accommodating portion 39 is provided separately from, for example, the two grip portions 1009 (see FIG. 9) held by the operator, and is detachably provided at an arbitrary position of the handle 1008, for example. The battery accommodating portion 39 is provided with a cell switch 71 for rotating the cell motor 76. When starting the engine 10, a power switch (not shown) is turned on and the recoil starter 40 is used, or the cell switch 71 is turned on. By pushing, the cell motor 76 rotates and the engine 10 is started. When stopping the engine 10 during operation, the engine 10 is stopped by switching the power switch from “ON (operation)” to “OFF (stop)”.

  A battery 80 that is substantially cylindrical and that can be attached to and detached from the battery housing 39 is housed inside the battery housing 39. The battery 80 has a substantially cylindrical shape and is configured in a so-called cassette type so that it can be attached to and detached from the battery housing 39. The battery 80 has two hook portions 81 a formed therein, and holds the battery 80 by engaging with a recess (not shown) formed on the inner wall of the battery housing portion 39. In order to remove the battery 80, the battery 80 is pulled out from the battery housing portion 39 while pushing the latch 81.

  For example, three 14500-size lithium ion battery cells (not shown) are accommodated in the battery 80. The shape of the rear end portion (lower side in the drawing) of the battery 80 is formed so as to cover the opening 39 a at the lower end of the battery housing portion 39. A substrate 85 is provided at the other end of the mounting space of the battery 80 following the opening 39a, and a plurality of terminals 84 are provided so as to extend from the substrate 85 toward the opening 39a. A plurality of terminals 83 are provided at the front end portion (upper side in the figure) of the battery 80, and the terminal 83 comes into contact with the terminal 84 formed on the battery housing portion 39 side by attaching the battery 80 to the battery housing portion 39. Therefore, the electric power of the battery 80 is supplied to the cell motor 76.

  FIG. 2 is a rear view of the engine working machine 1 according to the embodiment of the present invention. A carburetor 35 is provided on the left side of the engine 10 via an insulator 19 that connects an intake port of the engine 10, and a storage space for an air cleaner that filters inhaled air is formed on the outside (left side) of the carburetor 35. A cleaner cover 26 is provided. A muffler 16 is provided on the side (right side) of the engine 10, and an exhaust port 16 a serving as an exhaust gas outlet is provided on the rear surface side of the muffler 16. The muffler 16 is covered with a resin muffler cover 8 to prevent the operator from touching it directly. The upper part of the engine 10 is covered with a cylinder cover 7. A recoil starter 40 (see FIG. 1) is provided coaxially with the crankshaft 13 and at the rear end thereof, and the recoil starter 40 is covered with a starter case 9. In the engine working machine 1 of this embodiment, not only the recoil starter 40 but also the cell motor 76 (see FIG. 1) is provided, so that the shape of the starter case 9 is such that the portion covering the recoil starter 40 and the portion covering the cell motor 76 are connected. In addition, when viewed from the rear as shown in FIG. A starter handle 36 is provided on the left side of the starter case 9. A fuel tank 27 is provided below the crankcase 14. The fuel tank 27 is a container formed of a translucent polymer resin, and a mixed fuel in which gasoline and a predetermined ratio of oil are mixed can be put in by removing the cap 28 attached to the opening.

  A decompression 31 (see FIG. 1) is provided above the starter case 9, and the decompression button 31a is an operation button of the decompression mechanism, and is arranged so as to be exposed to the outside from a part of the cylinder cover 7. In this embodiment, a lighting means for indicating to the worker by a lamp when the decompressor 31 operates, that is, an LED 64 is provided. The LED 64 also serves as a lighting means for indicating the state when the power switch is turned on, and is configured so that the state of the decompression ON and the decompression OFF when the power is turned on can be distinguished by changing the lighting color. When starting the engine 10, first, the power switch is turned on, and the engine is started by pressing the cell switch 71 after pressing the decompression button 31a. The LED 64 is a two-color light emitting diode that emits red or green light. When the power switch is turned on, the switch 63 is turned on by the lever 64 and the LED 64 is lit red. Moving backward, the switch 63 is turned OFF and the lighting color of the LED 64 changes from red to green. By changing the lighting color in this manner, the operator confirms that the power switch is turned on (red), and that the decompressor 31 is turned on and the cell motor 76 or the recoil starter 40 is ready to start (green). Can be identified.

  A decompression cover 61 is provided around the decompression 31. The decompression cover 61 is provided separately for maintenance and ease of assembly, and is a part constituting part of the cylinder cover 7. The decompression cover 61 may be formed integrally with the cylinder cover 7 without being formed as a separate part. The decompression cover 61 is fixed to the cylinder cover 7 with four screws 67, and forms caution plates 65 and 66 for fixing the control board 62 shown in FIG. 1 and displaying the operation method of the decompression. Therefore, it is provided separately from the cylinder cover 7. A sticker (not shown) on which the operation method of the decompression 31 is printed is attached to the caution plates 65 and 66.

FIG. 3 is a longitudinal sectional view in a plane perpendicular to the crankshaft 13 of the engine working machine 1 of FIG. The engine 10 is a two-cycle single-cylinder engine that includes a crankcase 14 and a cylinder 11 that extends substantially vertically above the crankcase 14. A piston 12 is connected to the crankshaft 13 via a connecting rod, and the piston 12 reciprocates up and down inside the cylinder 11. The cylinder 11 has an intake port 21 for sucking the air-fuel mixture for combustion.
Is formed. Since the engine intake-compression-explosion-exhaust stroke is the same as that of a known two-cycle engine, a detailed description thereof will be omitted. In the present embodiment, the cylinder 11 is formed by integrally casting a cylinder main body, a head portion, and a heat radiating fin, for example, with an aluminum alloy, and a spark plug 25 is attached to the upper portion of the cylinder 11.

  The cylinder cover 7 is a cover made of synthetic resin such as plastic, for example, and mainly covers the cylinder 11 that becomes hot during operation so that an operator cannot directly touch them. The cylinder 11 is provided with a carburetor 35 via an insulator 19, and a cleaner body 15 forming an air cleaner chamber is attached to the suction side (left side) of the carburetor 35, and the opening of the cleaner body 15 has a cleaner cover 26. Covered by. An air filter (not shown) is provided in the air cleaner chamber. A muffler 16 is provided on the opposite side of the cylinder 11 from the vaporizer 35. A catalyst (not shown) is preferably provided in the muffler 16 for purification of exhaust gas. The muffler 16 is directly fixed to the cylinder 11 by two muffler fastening bolts 17 (only one is visible in the figure). A fuel tank 27 is disposed below the crankcase 14.

  Next, the starting procedure of the engine work machine 1 according to the embodiment of the present invention will be described using the flowchart of FIG. First, when a power switch (not shown) is turned on before starting the engine, a control circuit mounted on the control board 62 is activated (step 89), and an LED 64 is used to indicate that power can be supplied to the cell motor. Lights up red (step 90). The operator can easily recognize whether or not the power is on by turning on the LED 64 in red. Next, the operator turns on the decompression 31 by pressing the decompression button 31a. When the decompression button 31a is depressed, the display color of the LED 64 changes from red to green (steps 91 and 92), thereby making it easy for the operator to be ready to start the engine 10 (the decompression 31 is being operated). Can be visually confirmed. Further, when the cell switch 71 is pressed while the decompression button 31a is forgotten to be pressed, the cell switch 71 is in a short-circuited state, so that the operator temporarily shifts to the state where the display color of the LED 64 is red (step 93). Even if an attempt is made, the cell motor 76 cannot be rotated, so that the cell motor 76 can be prevented from being burned out.

  Next, when the operator presses the cell switch 71 after the display color of the LED 64 changes from red to green, the electric power of the battery 80 is supplied to the cell motor 76 only during the pressing, and the cell motor 76 rotates to rotate the engine 10. The crankshaft 13 rotates (steps 91 and 93). At this time, the control circuit determines whether or not the voltage of the battery 80 is less than a predetermined voltage (here, 8.0 V or less with respect to the rating of 10.8 V). (Step 96). When the voltage of the battery 80 is less than the predetermined voltage, the operator needs to start the engine 10 manually by operating the recoil starter 40 (step 95). Next, when the crankshaft 13 is rotated by the cell motor 76 or the recoil starter 40, the engine 10 is first ignited (first explosion), and the decompression 31 is automatically released (step 97).

  Next, the control unit (control circuit) determines whether or not the engine has started depending on whether the engine 10 continues to rotate (step 97). If not, the operations of steps 91 to 97 are repeated. When the engine is started, the cell switch 71 is released to stop the cell motor 76, or when the recoil starter 40 is used, the starter rope 42 is returned to the original winding state (step 99). To complete the starting operation. As described above, in the engine working machine according to the present embodiment, the decompression 31 is always operated when the engine 10 is started. Therefore, it is possible to effectively prevent the life of the cell motor from being reduced due to overload, and Miniaturization is now possible. Even when the recoil starter 40 is used, the LED 64 lights up in green when the decompressor 31 is turned on. Therefore, it is possible to easily recognize whether the starter handle 36 can be pulled and the decompressor 31 can be used. The starting operation with reduced pulling load can be performed. Therefore, although the decompression returned after the first explosion, but the engine did not start, it can be easily visually confirmed that the decompression is in the OFF state, so problems such as suddenly heavy load can be prevented, The operability can be improved. If the combined structure of the decompression mechanism and the cell motor is used in this way, it can be deployed to a general-purpose engine for a work machine having a high displacement.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the cell motor 76 is overloaded due to forgetting to operate the decompressor 31, but in the second embodiment, the forgetting to operate the decompressor is prevented, and the recoil starter 40 is used for manual operation. It was constructed so that the pulling load of the starter handle would not become heavy when starting. FIG. 5 is a longitudinal sectional view showing the internal structure of the engine working machine 101 according to the second embodiment of the present invention. The engine work machine 101 has the same configuration as that of the first embodiment in that it includes two starters, a cell motor 176 (described later in FIG. 6) and a manual recoil starter 40. The configuration of the power transmission means for transmitting the rotational driving force from the output shaft of the cell motor 176 to the crankshaft 113 is different. The basic configuration of the engine 110 is the same as that of the first embodiment, and the same applies to the point that a decompression is provided in the cylinder 111 (however, the decompression position is slightly different and the decompression is not visible at the cross-sectional position in FIG. 4). .

  A main shaft 152 is connected to the front side of the crankshaft 113, a flywheel 155 is fixed to the front side of the main shaft 152, and a crank side gear 153 is provided on the outer peripheral side of the flywheel via a bearing 154. A centrifugal clutch 130 is provided at the front end of the main shaft 152. The centrifugal clutch 130 is a known centrifugal clutch that rotates the clutch shaft 132 to which the clutch drum 130b is fixed by connecting the oscillator 130a to the clutch drum 130b by centrifugal force when the rotational speed of the main shaft 152 becomes a certain value or more. Mechanism. The movable gear 157 meshes with the external teeth of the crank side gear 153. The movable gear 157 can be moved in the axial direction (front-rear direction) as indicated by an arrow 173 by spline coupling with the third pinion 156. The switching means for moving the movable gear 157 will be described later with reference to FIGS. The third pinion 156 is rotatably held with respect to the housing 134 by a sliding bearing 158b on the front side and a ball bearing 158a on the rear side.

  FIG. 6 is a diagram showing a decompression operation unit (not shown). The operation panel 161 is formed on, for example, a side surface portion of the cylinder cover 107, and is provided with a power switch 166 and a decompression operation button 131a. The operation button 131a is a mechanical push button connected to the decompressor as in the first embodiment. However, the operation button 131a is not limited to the configuration, and a mechanical or electrical switch mechanism is used as a decompression switch. It may be embodied. The operation panel 161 is further provided with a cell switch 167 for rotating the cell motor, and an LED 164 is provided in the vicinity thereof.

  FIG. 7 is a view showing a state when the cell motor is used in the engine working machine 101 according to the second embodiment of the present invention, and is a cross-sectional view taken along the line BB of FIG. The cell motor 176 is disposed so as to protrude to the front side of the housing 134, and a pinion 175 attached to the rotating shaft 176 a meshes with a second gear 174 fixed to the second pinion 171. The second pinion 171 is rotatably supported on the housing 134 by two slide bearings 173a and 173b such as metal. A third gear 172 that meshes with the movable gear 157 is fixed to the second pinion 171. In this embodiment, the rotation of the cell motor 176 is transmitted to the crank side gear 153 (see FIG. 5) via the pinion 175, the second gear 174, the third gear 172, and the movable gear 157 via a plurality of gears and pinions.

  Here, the movable gear 157 can be moved in the axial direction with respect to the third pinion 156, and the movement is performed by sliding the switching lever 181 in the front-rear direction. In the state of FIG. 7, the switching lever 181 is slid rearward and the movable gear 157 is in a position where it is engaged with the third gear 172 and the crank side gear 153. In this state, the engine 110 can be started by rotating the cell motor 176.

  FIG. 8 is a diagram showing a state when the recoil starter 40 is started without using the cell motor 176 in the engine working machine 101 according to the second embodiment. If the recoil starter 40 is used in the connected state shown in FIG. 7, the cell motor 176 is also rotated, and an extra load is applied to the operator. Therefore, in this embodiment, when the engine 110 is manually started using the recoil starter 40, the switching lever 181 is slid forward. A gear pressing member 182 that contacts the front side and the rear side of the movable gear 157 is fixed to the switching lever 181. When the switching lever 181 is slid forward, the gear pressing member 182 causes the outer side of the movable gear 157 to be moved. Since the teeth are separated from the positions where the teeth mesh with the third gear 172 and the crank side gear 153, the power transmission state between the third gear 172 and the crank side gear 153 is interrupted. If the recoil starter 40 is used in this state, the force for rotating the cell motor 176 does not act on the worker, so an engine work machine that can be started with a pulling load equivalent to a general-purpose engine equipped with a conventional recoil starter is realized. it can. Although not shown, the switch means detects whether or not the switching lever 181 moves and the rotational force of the cell motor 176 is transmitted to the crank side gear 153, and the result is displayed by an LED or the like. You may comprise so that it may do. In a state where the rotational force of the cell motor 176 is not transmitted to the crank side gear 153 (the state shown in FIG. 8), power may not be supplied to the cell motor 176 even if the cell switch is pressed to prevent idling of the cell motor 176. .

  As described above, in the second embodiment, the connection of components such as the gear of the power transmission means for connecting the cell motor 176 and the crankshaft 113 can be easily separated by the operation of the switching lever 181, so that the manual start The pulling load of the starter handle 36 can be reduced.

  As described above, in the present invention, since the engine is started by the cell motor, the startability can be dramatically improved by using the battery in the general-purpose engine used in the engine working machine. Moreover, even when there is no remaining battery capacity, it is possible to ensure startability equivalent to that of a conventional general-purpose engine. As mentioned above, although this invention was demonstrated based on the Example, this invention is not limited to the above-mentioned Example, A various change is possible within the range which does not deviate from the meaning. For example, although the above-described engine working machine has been described using a brush cutter, the engine working machine is not limited to a brush cutter, but may be other engine working machines such as a cutter, a chain saw, and a lawn mower.

1 Engine work machine 7 Cylinder cover
8 Muffler cover 9 Starter case 10 Engine 11 Cylinder 12 Piston 13 Crankshaft 14 Crankcase 15 Cleaner body 16 Muffler 16a Exhaust port
17 Bolt 19 Insulator 21 Air inlet 22 Magnet rotor 23 Ignition coil 24 Ignition cord 25 Spark plug 25a Plug cap 26 Cleaner cover 27 Fuel tank 28 Cap 29 Centrifugal clutch 30a Oscillator 30b Clutch drum 31 Decompression 31a Decompression button 31b Flange section 32 Clutch Shaft 33 Bearing 34 Housing 35 Vaporizer 36 Starter handle 39 Battery housing 39a Opening 40 Recoil starter 41 Reel 42 Starter rope 43 Spiral spring 46 One-way clutch 47 Second drum 48 Bearing 49 Gear 50 One-way clutch 51 First drum 52 Power line 57 Pinion 61 Decompression cover 62 Control board 63 Switch 64 Lever 5 caution plate 71 cell switch 76 cell motor 76a rotating shaft 80 battery 81 latch 81a latching portion 83 terminal 84 terminal 85 substrate 101 engine work machine 107 cylinder cover 110 engine 111 cylinder 113 crankshaft 130 centrifugal clutch 130a swinger 130b clutch drum 131a Operation button 132 Clutch shaft 134 Housing 152 Main shaft 153 Crank side gear 154 Bearing 155 Flywheel 156 Third pinion 157 Movable gear 158a Ball bearing 158b Bearing 161 Operation panel 166 Power switch 167 Cell switch 171 Second pinion 172 Third gear 173a Bearing 174 Second gear 175 Pinion 176 Cell motor 176a times Axis 181 the switching lever 182 the gear holding member 1001 engine working machine 1004 main pipe 1007 throttle lever 1008 handle 1009 grip 1010 engine 1012 rotary blade 1013 scattering protection cover 1045 Wire

Claims (10)

An engine working machine driven by an engine,
A cell motor driven by electric power supplied from a battery to start the engine;
A cell motor switch for driving the cell motor;
A decompressor for extracting a part of the compression of the engine,
An engine working machine configured so that the cell motor does not rotate even when the cell motor switch is operated in a state where the decompressor is not operating.   2. The engine work machine according to claim 1, further comprising a switch circuit for connecting a power supply path to the cell motor when the decompressor is turned on. Detecting means for detecting the operating state of the decompressor;
The engine working machine according to claim 2, wherein control is performed to connect / cut off a power supply path to the cell motor in accordance with an on / off state of the decompressor.   The engine work machine according to any one of claims 1 to 3, further comprising a lighting unit that displays an operation state of the decompressor. A power switch for stopping the engine;
When the power switch is turned on, the lighting means lights in the first display mode,
The engine working machine according to claim 4, wherein when the decompression is turned on, the lighting means is lit in the second display mode.   6. The engine working machine according to claim 5, wherein the lighting means is a light emitting diode, and the first display mode and the second display mode are lighting in different colors.   The said engine is a two-cycle engine which has a crankcase and the cylinder fixed to the said crankcase, Comprising: The said decompression is provided in a cylinder, The Claim 1 characterized by the above-mentioned. Engine work machine. The cylinder part of the engine is covered by a cylinder cover,
The operation button of the decompression is exposed to the outside from the hole formed in the cover,
The engine working machine according to claim 7, wherein the lighting means is provided on the cylinder cover in the vicinity of the operation button. Power transmission means from the cell motor to the crankshaft of the engine;
The engine working machine according to any one of claims 1 to 8, further comprising a switching unit that mechanically switches between a connection state and a cutoff state of the power transmission unit. The power transmission means has a gear on the cell motor side, a gear on the crankshaft side, and a movable pinion that is interposed between these gears and transmits the rotational force of the cell motor to the crankshaft side,
The movable pinion is configured to be movable in the axial direction of a shaft that pivotally supports the movable pinion by an operation lever, and is engaged with both the gear on the cell motor side and the gear on the crankshaft side. The engine working machine according to any one of claims 1 to 8, wherein the engine working machine is held at a position where it does not mesh and at two positions.

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