Walking type working machine

Abstract

To provide a walking type working machine capable of dissolving troubles of an operation related to actuation of an engine.SOLUTION: A walking type working machine includes: an engine 11 including an electronic control fuel supply device FE; a startup device 35 for starting the engine 11; a control device CU for controlling actuation of the electronic control fuel supply device FE and the startup device 35; and an operation tool SG enabling a manual operation. The control device CU executes engine startup processing of controlling the electronic control fuel supply device FE into a startup operational state when a first operation is performed on an operation tool 36, and actuating the startup device 35 to start the engine 11, and executes engine stop processing of controlling the electronic control fuel supply device FE to stop the actuation of the engine 11 when a second operation is performed on the operation tool SG.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a walking work machine such as a walking type management machine, for example.

Background Art

[0002] In a walking type management machine which is an example of a walking work machine, conventionally, it is provided with an engine as a drive source, a cell motor as a starting device for starting the engine, a throttle lever for adjusting the engine rotation, a drive switch for driving the cell motor, etc. When starting the engine, there is one configured to drive the cell motor by inserting a key into the drive switch and rotating it (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above conventional configuration, when starting the engine, especially when the engine is cold, etc., it is necessary to perform adjustment operations such as adjusting the throttle lever to a high output position to set a large fuel supply amount, or operating the choke valve to increase the air-fuel ratio so that the engine starts smoothly.

[0005] An object of the present invention is to provide a walking work machine capable of eliminating the trouble of operations related to the operation of the engine.

Means for Solving the Problems

[0006] The characteristic configuration of the walking working machine according to the present invention includes an engine equipped with an electronically controlled fuel supply device, a starting device for starting the engine, a control device for controlling the operation of the electronically controlled fuel supply device and the starting device, and an operation tool that can be manually operated. When a first operation is performed on the operation tool, the control device controls the electronically controlled fuel supply device to a starting operation state, operates the starting device, and executes an engine starting process for starting the engine. When a second operation is performed on the operation tool, the control device executes an engine stop process for controlling the electronically controlled fuel supply device to stop the operation of the engine.

[0007] According to the present invention, since the engine is equipped with an electronically controlled fuel supply device, it is possible to stabilize the operation of the engine by reducing the influence of the external environment such as the temperature. When a first operation is performed on the operation tool, the engine starts. At this time, by controlling the electronically controlled fuel supply device to a starting operation state, for example, even when the engine is cold and difficult to start, a fuel supply state suitable for starting is achieved, so that the engine can be started efficiently. After that, when a second operation is performed on the operation tool, the operation of the engine is stopped. At this time, the engine can be stopped in an appropriate state by the electronically controlled fuel supply device.

[0008] Therefore, it has become possible to provide a walking working machine that can efficiently start the engine and stop the engine only by operating the same operation tool, and can eliminate the trouble of operating the engine.

[0009] In the present invention, it is preferable that a steering handle for performing a steering operation of the machine body is provided, and the operation tool is provided on the steering handle.

[0010] According to this configuration, the operator can operate the operation tool without significantly removing the hand from the steering handle, and the operability is good.

[0011] In the present invention, it is preferable that the operating tool is configured to be capable of performing a rotation operation and a pressing-down operation, the first operation is the rotation operation, and the second operation is the pressing-down operation.

[0012] According to this configuration, by properly using the rotation operation and the pressing-down operation, even with a single operating tool, the possibility of operation errors is reduced.

[0013] In the present invention, it is preferable that the operating tool is configured to be switchable to a power-on state in which power supply to the electrical components is started with a manual operation, and when the first operation is performed on the operating tool, it switches to the power-on state and the control device executes the engine start process.

[0014] According to this configuration, when it is necessary to supply power to the electrical components provided in the aircraft body, when the first operation is performed on the operating tool, it switches to the power-on state in one operation, power is supplied to the electrical components, and the engine starts, so that work can be efficiently performed.

[0015] In the present invention, it is preferable that the operating tool is configured to be switchable to a power-on state in which power supply to the electrical components is started with a manual operation, and when a third operation is performed on the operating tool, it switches to the power-on state, and when the first operation is performed following the third operation, the control device executes the engine start process.

[0016] According to this configuration, after switching to the power-on state by the third operation on the operating tool, the engine can be started by another first operation, so that the engine can be set to a startable state through a preliminary operation, thereby avoiding the engine starting contrary to the operator's intention due to an incorrect operation by the operator.

[0017] In the present invention, it is preferable that, separately from the operating tool, there is provided another operating tool that can be switched to a power-on state in which power supply to the electrical components is started with a manual operation.

[0018] According to this configuration, since the engine can be preliminarily set to a startable state by an operating tool different from the operating tool for starting the engine, it is possible to avoid the engine starting against one's will due to a misoperation.

[0019] In the present invention, it is preferable that a steering handle for performing a steering operation of the machine body is provided, the operating tool is provided at one side portion in the left-right direction of the steering handle, and the other operating tool is provided at the other side portion in the left-right direction of the steering handle.

[0020] According to this configuration, since the operator operates the operating tool and the other operating tool with different hands, it is possible to more reliably avoid the engine starting due to a misoperation of the operator.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0022] 〔First Embodiment〕 Hereinafter, an embodiment of a walking type management machine, which is an example of a walking type working machine according to the present invention, will be described with reference to the drawings. Note that the present invention is not limited to the following embodiments, and various modifications are possible without departing from the gist thereof.

[0023] In the description of this embodiment, the front-back direction and the left-right direction are described as follows unless otherwise specified. That is, the forward traveling direction (refer to the arrow FR in FIGS. 1 and 2) during the working travel of the walking-type management machine is "front", the backward traveling direction (refer to the arrow BK in FIGS. 1 and 2) is "rear", and the direction corresponding to the right side based on the forward posture in the front-back direction (refer to the arrow RH in FIG. 2) is "right", and similarly, the direction corresponding to the left side (refer to the arrow LH in FIG. 2) is "left".

[0024] 〔Overall Configuration〕 As shown in FIG. 1, an engine 11 serving as a drive source is mounted on an engine frame 10 that forms a part of the machine body frame 1 of the traveling machine body of the walking-type management machine. In this embodiment, the engine 11 is provided with an electronically controlled fuel supply device FE (FIG. 3). The electronically controlled fuel supply device FE forcibly injects and supplies fuel into the combustion cylinder by an actuator and adjusts the intake air amount by a throttle valve, and can change and adjust the rotational speed of the engine 11. That is, the electronically controlled fuel supply device FE includes an electronically controlled fuel supply device. Further, the electronically controlled fuel supply device FE has the function of an electronic governor that suppresses fluctuations in the rotational speed of the engine 11. Therefore, there are advantages such as reducing the influence of the external environment such as temperature, stabilizing the operation of the engine 11, and realizing detailed control.

[0025] A transmission case 2 that forms the machine body frame 1 together with the engine frame 10 is integrally connected to the rear side of the engine frame 10. The engine 11 and the transmission case 2 are interlocked and connected so as to be able to transmit power via a belt transmission mechanism 12.

[0026] The transmission case 2 is formed in a bifurcated shape and includes a front case 2A extending downward and a rear case 2B extending obliquely rearward and downward.

[0027] The left and right traveling devices 13 are supported via an axle 20 at the lower part of the front case 2A. In this embodiment, the traveling device 13 is a wheel. The traveling device 13 may be another type of device such as a crawler traveling device.

[0028] The working device 14 is supported on the rear case 2B via the drive shaft 21. In the present embodiment, the working device 14 is a rotary tilling device. The working device 14 may be another type of device such as a ridging machine or a seeding machine.

[0029] The power of the engine 11 is transmitted via the belt transmission mechanism 12 to a gear shifting mechanism (not shown) inside the transmission case 2. The belt transmission mechanism 12 is configured such that power transmission can be turned on and off by the clutch operation arm 12a. The belt transmission mechanism 12 and the clutch operation arm 12a constitute a main clutch 31 (FIG. 3) that interrupts the power transmission to the traveling drive system and the working drive system.

[0030] Inside the transmission case 2, a working clutch 32, a traveling clutch 33, and a differential mechanism 34 are provided (see FIG. 3). The power from the main clutch 31 is branched and transmitted to the working clutch 32 and the traveling clutch 33. The traveling clutch 33 is not necessarily required, and a configuration without the traveling clutch 33 may be adopted.

[0031] The working clutch 32 turns on and off the power transmission to the working device 14. The traveling clutch 33 turns on and off the power transmission to the traveling device 13 via the differential mechanism 34. The differential mechanism 34 can regulate the differential of the left and right traveling devices 13.

[0032] The main shift lever 15 extends obliquely rearward and upward from the upper part of the transmission case 2. By operating this main shift lever 15, it is possible to perform the shift operation and the forward / backward switching operation of the traveling device 13, as well as the forward / reverse rotation operation of the working device 14.

[0033] The steering handle 16 extends from the rear part of the transmission case 2 toward the rear of the machine body. A turning lever 17, a switching operation tool 36 (an example of an operation tool), and a throttle lever 19 are arranged on the right side portion of the steering handle 16. A main clutch lever 3 is arranged on the rear end side of the steering handle 16.

[0034] In the walking-type management machine configured as described above, the operator walks with the walking-type management machine while operating the walking-type management machine by holding the steering wheel 16. Turning is performed by the operator turning the steering wheel 16 left and right to change the traveling direction of the walking-type management machine.

[0035] 〔Power transmission system and engine operation system〕 FIG. 3 shows the power transmission system and the engine operation system of the walking-type management machine of the present embodiment.

[0036] The power transmission system will be described. The power transmission from the engine 11 to the work device 14 is performed via the main clutch 31 and the work clutch 32. The power transmission from the engine 11 to the traveling device 13 is performed via the main clutch 31, the traveling clutch 33, and the differential mechanism 34.

[0037] The engine operation system will be described. The walking-type management machine of the present embodiment includes a starter motor 35 as a starting device for starting the engine 11, a control device CU for controlling the operation of the electronic control fuel supply device FE and the starter motor 35, and a switching operation tool 36 as an example of an operable operation tool SG by a human. Although not shown, the walking-type management machine also includes a drive circuit for operating the starter motor 35, an electrical circuit for lighting, other electrical components, a battery for supplying power, and the like.

[0038] When a first operation is performed on the switching operation tool 36, the control device CU controls the electronic control fuel supply device FE to the starting operation state, and executes an engine starting process for starting the engine 11 by operating the starter motor 35. When a second operation is performed on the switching operation tool 36, the control device CU is configured to execute an engine stopping process for controlling the electronic control fuel supply device FE to stop the operation of the engine 11.

[0039] Specifically, it will be described. A starter motor 35 as an engine starting device for rotationally driving the output shaft of the engine 11 to start the engine 11 is provided. Although not shown because it is a well-known configuration, a ring gear is provided on the outer periphery of a flywheel provided on the output shaft of the engine 11. The starter motor 35 includes a pinion gear that meshes with the ring gear, and by rotationally driving the pinion gear, the output shaft can be rotated to start the engine 11.

[0040] The switching operation tool 36 is provided on the steering handle 16 and can be easily operated by an operator who has released the hand while gripping the steering handle 16. The switching operation tool 36 is configured by a rotary push operation switch that can perform a rotary operation and a push operation.

[0041] The switching operation tool 36 has a cylindrical operation body 37. The operation body 37 is provided in a state where it can move vertically along the axial direction and is biased upward by a spring (not shown). The operation body 37 can be pushed downward against the biasing force. The operation body 37 can be rotated along the circumferential direction in a pushed-in state. The operation body 37 can be changed in position to two positions, a stop position and an operation position, by a rotation operation.

[0042] The switching operation tool 36 includes a push detection switch SW1 that becomes an on state when it detects that the operation body 37 has been pushed in, and a rotation detection switch SW2 that becomes an off state when in the stop position and an on state when in the operation position.

[0043] The first operation described above is an operation of rotating the operation body 37 to switch from the stop position to the operation position. Also, the second operation described above is a pushing-down operation on the switching operation tool 36.

[0044] When a first operation is performed on the switching operation tool 36, that is, when the operating body 37 is rotationally operated to switch from the stop position to the operating position, the power is switched on and the control device CU executes an engine start process. That is, the electronic control fuel supply device FE is controlled to an operating state for starting, and the cell motor 35 is operated to start the engine 11.

[0045] Therefore, when the rotation detection switch SW2 is turned on while the engine 11 is not operating, the control device CU determines that the first operation has been performed, and the control device CU executes an engine start process.

[0046] After the engine 11 is started, the control device CU controls the operation of the electronic control fuel supply device FE so that the fuel supply amount corresponds to the engine speed set by the operation of the throttle lever 19.

[0047] When the push detection switch SW1 is turned on while the engine 11 is operating, the control device CU determines that the second operation has been performed and executes an engine stop process.

[0048] That is, when a second operation is performed on the switching operation tool 36 while the switching operation tool 36 is in the operating position and the engine 11 is operating, that is, when a pushing-down operation on the switching operation tool 36 is performed and the push detection switch SW1 is turned on, the control device CU controls the operation of the electronic control fuel supply device FE to stop the operation of the engine 11.

[0049] Therefore, when the push detection switch SW1 is turned on while the engine 11 is operating, the control device CU determines that the second operation has been performed and executes an engine stop process.

[0050] 〔Second Embodiment〕 The second embodiment of the present invention will be described. In the description of the following embodiments, detailed descriptions of the same configurations as those in the above-described embodiments will be omitted. The same configurations are denoted by the same reference numerals.

[0051] In the walking-type management machine of this embodiment, in addition to the first operation and the second operation, the operating tool SG is configured to be capable of a third operation. When the third operation is performed on the operating tool SG, the power is switched on, and when the first operation is performed following the third operation, the control device CU is configured to execute engine start-up processing.

[0052] Specifically, as shown in FIG. 4, the operating body 41 of the switching operating tool 40 as the operating tool SG can be changed in position to three positions: a stop position, an on position (operation), and a start position by a rotation operation. The switching operating tool 40 includes a push detection switch SW1 that becomes an on state when it detects that the operating body 41 is in a pushed state, a first rotation detection switch SW3 that becomes an off state when in the stop position and an on state when in the on position (operation), and a second rotation detection switch SW4 that becomes an off state when in the stop position and an on state when in the start position. Note that the first rotation detection switch SW3 and the second rotation detection switch SW4 do not have to be separate switches and may be an integrated configuration. In short, any configuration that can recognize whether it is in the stop position, the on position (operation), or the start position is acceptable.

[0053] The above-described third operation is an operation of rotating the operating body 41 to switch from the stop position to the on position. The first operation is an operation of rotating the operating body 41 to switch from the on position to the start position. The second operation is a pressing-down operation on the operating body 41.

[0054] When the third operation is performed on the switching operating tool 40, that is, when the operating body 41 is rotated to switch from the stop position to the on position, the power is switched on. Further, when the operating body 41 is rotated to switch from the on position to the start position, the control device CU executes engine start-up processing. The engine start-up processing is the same as that in the first embodiment.

[0055] Therefore, when the first movement detection switch SW3 is in the ON state with the engine 11 not operating, it switches to the power-on state. After that, when the second movement detection switch SW4 is in the ON state, the engine 11 starts.

[0056] When a second operation is performed while the engine 11 is starting, that is, when the operating body 41 is pushed in and the push detection switch SW1 is in the ON state, the control device CU executes an engine stop process. At that time, as the operating body 41 is pushed in, the operating body 41 is automatically returned to the stop position. Note that the operating body 41 may be manually returned to the stop position after the engine 11 stops.

[0057] 〔Third Embodiment〕 The third embodiment of the present invention will be described. In the description of the following embodiments, detailed descriptions of the same configurations as those in the above-described embodiments will be omitted. The same configurations are denoted by the same reference numerals.

[0058] The walking type management machine of the present embodiment is provided with a switching operation tool 50 as an operation tool SG, and separately from the switching operation tool 50, there is provided another operation tool 51 that can be switched to a power-on state for starting power supply to the electrical components along with a manual operation. The switching operation tool 50 is provided at one location in the left-right direction of the steering handle 16, and the other operation tool 51 is provided at the other location in the left-right direction of the steering handle 16.

[0059] That is, as shown in FIG. 5, the switching operation tool 50 has the same configuration as that in the first embodiment, has a cylindrical operating body 52, and can be rotationally operated and pushed. It includes a push detection switch SW1 that becomes in the ON state when it detects that the operating body 52 is in the pushed-in state, and a rotation detection switch SW2 that becomes in the OFF state when it is in the stop position and becomes in the ON state when it is in the operating position.

[0060] The auxiliary operating tool 51 is a so-called key switch, which is configured to insert a key through the insertion slot 53 and perform a rotation operation in the inserted state. The rotation operation can be performed over two positions: the off position and the on position. Before the key is inserted, it is in the off position, and it can be rotated toward the on position in the state where the key is inserted.

[0061] When the auxiliary operating tool 51 is operated to the on position, it switches to the power-on state where the power supply to the electrical components is started. In the state where it has switched to the power-on state, when the operating body 52 is rotationally operated and the rotation detection switch SW2 is turned on, the control device CU executes the engine start process. The pressing operation of the switching operating tool 50 at this time corresponds to the first operation.

[0062] When the operating body 52 is pressed and the press detection switch SW1 is turned on while the engine 11 is running, the control device CU executes the engine stop process. The pressing operation of the switching operating tool 50 at this time corresponds to the second operation.

[0063] As shown in FIG. 6, the switching operating tool 50 is provided at a position on the right side of the steering handle 16 and near the grip portion of the steering handle 16. The auxiliary operating tool 51 is provided at a position on the left side of the steering handle 16 and near the grip portion of the steering handle 16. The arrangement configuration is not limited to this, and it may be configured such that the switching operating tool 50 is provided at a position on the left side of the steering handle 16 and the auxiliary operating tool 51 is provided at a position on the right side of the steering handle 16.

[0064] 〔Alternative Embodiment〕 (1) When the operating tool SG is configured to be capable of a rotation operation and a pressing-down operation, the first operation may be a pressing-down operation and the second operation may be a rotation operation.

[0065] (2) The operating tool SG is not limited to a rotation operation or a pressing-down operation, and may be configured to be switched by a rocking operation. Instead of an on-off switch, it can be configured to perform a contact operation on a touch sensor, and various configurations can be used to correspond to this.

[0066] (3) The operating tool SG may be provided at a location different from the steering handle 16, for example, at the rear end of the machine body where the main transmission lever 15 is provided.

Industrial Applicability

[0067] The present invention can be applied to, for example, a walking type working machine such as a walking type management machine.

Explanation of Signs

[0068] 11 Engine 16 Steering handle 35 Starter motor CU Control device SG Operating tool

Claims

1. An engine equipped with an electronically controlled fuel supply device, A starting device for starting the engine, A control device for controlling the operation of the electronically controlled fuel supply device and the starting device, An operable operating tool, and is provided with, The control device, When a first operation is performed on the operating tool, the electronically controlled fuel supply device is controlled to a starting operation state, and the starting device is operated to execute an engine starting process for starting the engine, A walking type working machine that executes an engine stop process for controlling the electronically controlled fuel supply device to stop the operation of the engine when a second operation is performed on the operating tool.

2. A steering handle for performing a steering operation of the machine body is provided, The operating tool is provided on the steering handle, and the walking type working machine according to claim 1.

3. The operating tool is configured to be capable of a rotation operation and a pressing down operation, The first operation is the rotation operation, and the second operation is the pressing down operation, and the walking type working machine according to claim 1.

4. The operating tool is configured to be switchable to a power-on state in which power supply to electrical components is started with an artificial operation, When the first operation is performed on the operating tool, it switches to the power-on state, and the control device executes the engine starting process, and the walking type working machine according to any one of claims 1 to 3.

5. The operating tool is configured to be switchable to a power-on state in which power supply to electrical components is started with an artificial operation, When a third operation is performed on the operating tool, it switches to the power-on state, and when the first operation is performed following the third operation, the control device executes the engine starting process, and the walking type working machine according to any one of claims 1 to 3.

6. Separate from the operating tool, a separate operating tool that is switchable to a power-on state in which power supply to electrical components is started with an artificial operation is provided, and the walking type working machine according to any one of claims 1 to 3.

7. A steering handle for performing a steering operation of the machine body is provided, The operating tool is provided at one location in the left-right direction of the steering handle, The separate operating tool is provided at the other location in the left-right direction of the steering handle, and the walking type working machine according to claim 6.

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