JP3086159B2 - Engine start operation part of work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine start operating section in a working vehicle such as an agricultural working vehicle configured to start a mounted engine with a recoil starter or a crank handle.

[0002]

2. Description of the Related Art Conventionally, in an agricultural work vehicle such as a harvester which is an example of the work vehicle, the engine can be started at any time by pulling a knob of a recoil starter or rotating a crank handle.

[0003]

In a work vehicle, an engine output is generally transmitted to a traveling system and a work system, and power can be transmitted to at least one of these transmission systems, that is, the engine is in a state of being able to transmit power. If the engine start operation is performed while the engine is mechanically connected to at least one of the traveling system and the working system, the engine under load will be started, and the knob operation of the recoil starter and the crank operation A large force is required for the rotation operation of the handle, which may make it difficult for a weak operator to start.

In some work vehicles, the engine is basically started by a starter motor, and the engine can be manually started using a recoil starter or a crank handle. In such a model, if the engine start operation is performed using the cell motor in a state where power can be transmitted to at least one of the traveling system and the working system, a large load is applied to the cell motor, and the battery is weak. In such a case, the engine cannot be started at one time, and the battery may run down while the start operation is repeated. The present invention has been made in view of such a point, and an object thereof is to make it possible to start the engine lightly without applying a load.

[0005]

According to a first aspect of the present invention, there is provided a working vehicle provided with a recoil starter for starting an engine by pulling a knob, wherein the knob is pulled out at a position forward of the knob in the pulling direction. A movable baffle member that can be switched between an open state that allows the vehicle and a restraint state that blocks the draw-out path of the knob, and the baffle member is provided only when it is detected that power transmission from the engine to the traveling system and the work system is cut off. It provided an automatic operating means for the member in the open state
And a starter motor to start the engine
Only when the obstruction member is in the open state, does the communication of the starter motor occur.
A switch means for permitting electric operation is provided .

According to the first aspect of the present invention, when one or both of the traveling system and the working system are in a transmittable state, the obstruction member is in a restraining state and the pulling operation of the knob becomes impossible.
The engine can be recoil-started only when both the running system and the working system are detected to be in the non-transmission state, that is, when the running load and the working load are not applied to the engine. The engine can be started easily by pulling the knob lightly.

According to a second feature of the present invention, in a work vehicle configured to start an engine by a crank handle, an open state in which the crank handle can be inserted and withdrawn and a crank handle inserted into a portion where the crank handle is inserted and removed. Automatic operation means for providing a movable obstruction member for switching to a restraining state to be blocked and for opening the obstruction member only when it is detected that power transmission from the engine to the traveling system and the working system is cut off If you provide
In addition, if you have a starter motor to start the engine
In both cases, only when the baffle member is open,
Is provided with a switch means for permitting the energizing operation .

According to the second aspect of the present invention, when one or both of the traveling system and the working system are in a transmittable state, the obstruction member is in a restraining state and the crank handle cannot be mounted on the engine. It is possible to start the steering wheel of the engine only when both the running system and the working system are in the non-transmission state, that is, when no running load or work load is applied to the engine. The engine can be easily started by lightly rotating the crank handle.

[0009] According to the first aspect and second aspect, usually able to start the engine with a starter motor switch operation using a key switch, when the battery can no longer cell start gone up For example, the engine can be started manually using a recoil starter or a crank handle.

In the case of starting the cell, the starting operation can be performed only when the load of the traveling system and the working system is not applied to the engine. Therefore, even if the battery is weak and the output of the cell motor is slightly reduced, the engine is started. Becomes possible,
It is less likely that the start operation is performed while the load is applied to the engine and the start of the starter motor is unnecessarily repeated to raise the battery. Further, even if the battery is particularly weak and the recoil start or the handle start is forced, the engine can be started by a light manual operation as described above.

[0011]

As a result, it is possible to prevent the engine starting operation in a state where power can be transmitted to the traveling system or the working system, and to lightly start the engine only when no load is applied. The engine can be easily started even by a weak operator.

Further, even in a work vehicle equipped with both a manual starting means and a starter motor, unnecessary battery consumption due to start of the cell with a load applied can be avoided.

[0013]

(First Embodiment) FIG. 1 shows a harvester which is an example of a working vehicle.
This harvester has a threshing device 2, an engine 4, and the like mounted on a vehicle body 3 having a crawler-type traveling device 1.
In the process, the culm is pinched and conveyed by the feed chain 5 and the pinching rail 6, supplied to the handling room A, threshed by the handling drum 7, and the processed material leaking from the receiving net 8 is sieved and sorted by the swing sorting case 9. After sorting by wind sorting by Karino 10, the first item is discharged to the collection section at the rear of the machine by the horizontal feed screw conveyor 11 and the vertical feed screw conveyor 12, and is forked at the end of the vertical feed screw conveyor 12. And configured to be bagged via the discharge cylinder 13 of
The second product is reduced into the handling room A by the lateral feed screw conveyor 14 and the lower 15, and the processed material which has not leaked from the receiving net 8 is supplied from the end of the handling room A to the vortex sorting chamber B. The straw dust is sucked by the dust exhaust fan 16 and discharged out of the machine through the dust outlet, and the second thing such as a grain with branches is stalled to remove the dust.
It is configured to drop and collect in the number collection section.

FIG. 2 shows a start operation section of the engine 4. In this embodiment, a gasoline engine is used as the engine 4, and a recoil starter 18 for starting the engine by pulling a knob 17 is provided on a side surface thereof.
And a traveling clutch lever 19 also serving as a forward / reverse switching lever for performing on / off operation of a traveling clutch for intermittently transmitting power to a transmission case (not shown) of the crawler traveling device 1 and for switching between forward and reverse. A work clutch lever 20 for turning on and off a threshing clutch for intermittently transmitting power to the device 2 is provided in the control section.

As shown in FIG. 2 and FIG.
Is arranged inside the engine bonnet 21, a baffle member 23 for opening and closing the knob operation opening 22 provided in the engine bonnet 21 is attached to the rotation support shaft 24, and the baffle member 23 is opened and urged by a torsion spring 25. The work clutch lever 2 is attached to the operation arm 26 attached to the rotation support shaft 24.
0 is interlocked and connected by a release wire 27. Therefore, when the work clutch lever 20 is at the disengaged position, the operation arm 26 is in a free state, and the obstruction member 23 is
When the work clutch lever 20 is in the clutch engaged position, the wire 27 is opened.
Is pulled, the operation arm 26 is pulled down and swung against the torsion spring 25, and the obstruction member 23 is closed in a restrained state in which the knob 17 blocks the drawing path of the knob 17.

The traveling clutch lever 19 is linked to operate a gear transmission mechanism in a transmission case (not shown) by right and left swing thereof and to operate a belt tension type traveling clutch by swinging back and forth. At the neutral stop position, the traveling clutch is disengaged. At this neutral stop position, the traveling clutch lever 19 is swung right and left to select the gear transmission mechanism to be forward or reverse, and to swing forward or backward from the selected operation position. Then, the traveling clutch operating arm 29 is pivoted downward around the fulcrum 28 by the balance arm 19a that swings back and forth integrally with the traveling speed change lever 19, and the traveling clutch is engaged, thereby starting the power transmission in the selected forward or reverse travel. It has become.

An operating member 30 is connected to a lower end of a rod 31 extending from the traveling clutch operating arm 29,
The operation arm 2 is inserted into the elongated hole 33 provided in the operation member 30.
The pin 32 attached to 6 is inserted. Therefore, the traveling clutch lever 19 is in the neutral stop position (clutch disengaged state).
In this state, the operating member 30 rises and does not act on the pin 32. When the work clutch lever 20 is in the disengaged state, the operating arm 26 is in a free state and the obstruction member 23 can be opened. Becomes In addition, the traveling clutch lever 19 is in the forward or reverse position (the clutch is engaged).
, The descending operation member 30 pushes down and swings the operation arm 26 via the pin 32 against the torsion spring 25 to close the baffle member 23. In short, only when the traveling clutch lever 19 is in the neutral stop position (traveling clutch disengaged state) and the work clutch lever 20 is in the disengaged state, the obstruction member 23 is opened to allow the pulling operation of the knob 17 of the recoil starter 18. Thus, the automatic operation means for starting the engine is constituted.

As shown in FIG . 4, the recoil starter 18 and the starter motor 34 are provided as a means for starting the engine 4 . A normally-closed traction switch 35 is provided in the starting circuit of the starter motor 34 and the obstruction member 23 is provided.
A switch lever 36 provided on the rotary support shaft 24 is configured so that the traction switch 35 can be pressed and operated via a relay pin 37. When the obstruction member 23 is opened to open the knob operation opening 22, the traction switch 35 is closed. When the obstruction member 23 enters the restraining state in which the knob operation opening 22 is closed, the restraining switch 35 is configured to open.
That is, when one or both of the traveling clutch and the working clutch are in the on state, the obstruction member 23 is closed by the mechanical automatic operation means, and the traction switch 35 is closed.
Are opened so that the starter motor 34 is turned on even if a start switch 38 constituted by a key switch is turned on.
Are not to be activated.

(Embodiment 2) FIGS. 5 to 8 show a third embodiment of the present invention. In this embodiment, a diesel engine is used as the engine 4 in a harvester similar to that of the first embodiment, and a belt transmission to a transmission case (not shown) of the crawler-type traveling device 1 is provided on an engine output shaft 4a. Output pulley 39 and an output pulley 40 for transmitting the belt to the threshing apparatus 2 are attached. Then, as shown in FIG. 6, a tension arm 43 swingable around a fulcrum 42.
And a tension pulley 47 attached to a tension arm 49 that can swing around a fulcrum 48 to form a belt tension type work clutch, as shown in FIG. The traveling clutch lever 19
Release wire 44, bell crank 45, rod 46
The work clutch lever 20 is connected to the tension arm 49 via the release wire 50, the bell crank 51, the rod 52, and the like.

A crank handle 5 for starting the engine 4
An insertion hole 53 is provided in the engine bonnet 21 so that the engine 4 can be started by rotating the engine starting shaft 4b manually by the crank handle 54. Further, a starter motor 34 is attached to the engine 4, and the starter switch 38 can start the engine 4.

A baffle member 23 for opening and closing the crank handle insertion hole 53 is attached to the rotation support shaft 58, and the baffle member 23 is opened and urged by a spring 59 to form an operation member 60 attached to the tension arm 43 for the traveling clutch. The arm 61 attached to the rotation support shaft 58 is interlocked by inserting the pin 63 of the arm 61 into the long hole 62 of the operation member 60, and when the traveling clutch lever 19 is at the stop position (clutch disengaged state), the operation member 60 is moved. When the traveling clutch lever 19 is in the driving position (clutch-engaged state), the operating member 60 is pressed against the pin 63 and becomes in a state where it does not act on the pin 63. The member 23 is configured to close in a restrained state against the spring 59.

The operation member 64 attached to the tension arm 49 for the work clutch and the arm 65 attached to the rotary support shaft 58 are linked by inserting the pin 67 of the arm 65 into the long hole 66 of the operation member 64, Work clutch lever 20
Is in the stop position (clutch disengaged state).
Does not act on the pin 67 and the obstruction member 2
3 is in the released state, and when the work clutch lever 20 is in the driving position (clutch-engaged state), the operating member 64
7 is in a pressing action state, and the baffle member 23 is
It is configured to close to the restraint state against 9. In short, the obstruction member 2 is only provided when both the traveling clutch and the work clutch are in the disengaged state and the engine 4 is in the no-load state.
3 is provided with a mechanical automatic operating means.

Further, a restraint switch 68 is provided on the start and open circuit of the starter motor 34, and a switch lever 69 is provided on the rotation support shaft 58 of the baffle member 23. When the baffle member 23 is opened, the restraint switch 35 is closed. The cell can be started, and when the baffle member 23 is closed in the restrained state, the restraint switch 25 is opened to disable the cell start.

[Another Embodiment] The present invention is applicable to agricultural machines such as combine harvesters and other various work vehicles. When the main clutch is in a disengaged state and the transmission system is provided with a transmission system that is branched from the lower side of the main clutch, the baffle member 23 is configured to be switched to the disengaged state. You can also. The specific configuration for opening and closing the baffle member 23 can be appropriately changed in design of a mechanical type, an electric type, and a hydraulic type, and these are collectively referred to as automatic operation means.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a harvester.

FIG. 2 is a side view of an engine start operation unit according to the first embodiment.

FIG. 3 is a front view of the engine starting restraint structure (a) Engine starting restraint state (b) Engine startable state

FIG. 4 is an explanatory view of a main part of a second embodiment.

FIG. 5 is a front view of an engine start operation unit according to a third embodiment.

FIG. 6 is a side view showing a traveling clutch part according to a third embodiment.

FIG. 7 is a side view showing a work clutch part according to the third embodiment.

FIG. 8 is a side view showing a crank handle insertion hole according to the third embodiment.

[Explanation of symbols]

 4 Engine 17 Knob 18 Recoil starter 23 Obstruction member 34 Cell motor 54 Crank handle

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification code FI F02N 11/00 F02N 11/00 Z (56) References JP-A-3-185268 (JP, A) JP, U) JP-A 50-111209 (JP, U) JP-A 2-130820 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02N 3/02 F02N 1/00 F02N 11/00

Claims (2)

(57) [Claims] 1. A work vehicle provided with a recoil starter (18) for starting an engine (4) by a pulling operation of a knob (17).
A movable obstruction member (23) is provided which can be switched between an open state allowing the pull-out of 7) and a check state blocking the pull-out path of the knob (17), and the power transmission from the engine (4) to the traveling system and the working system is cut off. provided with automatic operation means only that the baffle member (23) to the open state when it is detected that the state, 併a cell motor (34) for starting the engine (4)
The cell is provided only when the baffle member (23) is open.
Switch means for allowing the motor (34) to be energized is provided.
Engine starting operation of the work vehicle, characterized in that only are. 2. An engine (4) is connected to a crank handle (5).
4) Switching between an open state in which the crank handle (54) is inserted and withdrawn and a restraint state in which the crank handle (54) is prevented from being inserted into and out of the work vehicle configured to be started according to 4). A movable baffle member (23) is provided to automatically open the baffle member (23) only when it is detected that power transmission from the engine (4) to the traveling system and the work system is cut off. An operation means is provided, and a starter motor (34) for starting the engine (4) is also provided.
In the open state of the baffle member (23).
A switch allowing the energizing operation of the cell motor (34).
An engine start operation section of a working vehicle, wherein the engine start operation section is provided with a switch means .