JP3065890B2 - Walking management machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt-type transmission for transmitting power from an engine to a traveling transmission case by operating a single operating tool to a high-speed position. To increase the tension of the belt of the second transmission unit by operating the operating tool to the low-speed position, thereby transmitting the low-speed rotation, and to the neutral position of the operating tool. More particularly, the present invention relates to a mechanism for stopping traveling when an operator releases his / her steering wheel, so that the first and second transmission parts are not transmitted by the operation.

[0002]

2. Description of the Related Art There is a transmission disclosed in Japanese Utility Model Laid-Open Publication No. 56-150622, which is constructed so as to be capable of switching between high and low stages as described above. By lowering the belt tension of the part,
It is configured so that it can be used also as a clutch mechanism that cuts off transmission of power. Japanese Utility Model Application Laid-Open No. 60-110084 discloses a pedestrian-type control device which is provided with a mechanism that stops running when an operator releases his / her control handle. A safety lever for biasing the main clutch lever provided to the disengagement position and abutting on the main clutch lever to hold the main clutch lever in the on position is provided. When the safety lever is released, the main clutch lever automatically returns to the disengagement position.

[0003]

Here, assuming a management machine constructed by combining the above two conventional examples, a belt-type transmission is also used as a clutch mechanism, and a clutch lever for operating this clutch mechanism is used. Bias in the cutting direction,
Further, in the case where the safety lever is provided to be in contact with the clutch lever and held at the on position, the clutch mechanism is automatically disengaged when the safety lever is released as described above.

[0004] Further, in a belt-type transmission, in both the high-speed side and the low-speed side, in the transmission state, increasing the belt tension has a characteristic of reducing slip and increasing transmission efficiency, as described above. If the clutch lever is biased to the disengagement side and held at the on position by contact of the safety lever, the safety lever will prevent the return operation of the clutch lever from contacting at a predetermined position. As the position is further away from the operation end position on the entry side of the clutch lever, the belt is more likely to slip, and there is room for improvement.

SUMMARY OF THE INVENTION An object of the present invention is to provide a walking type control device which automatically stops running when an operator leaves, in a device provided with a belt-type transmission which is also used as a clutch mechanism. It is in.

[0006]

As described at the beginning, a feature of the present invention is that a belt-type transmission for transmitting power from an engine to a transmission case for traveling is provided by a high-speed position of an operating tool. A high-speed first transmission unit that functions by operating
A low-speed second transmission portion that functions by operating the operating tool to a low-speed position, and that is operated by operating the operating tool to a neutral position.
In a walking-type management machine configured not to perform transmission with the second transmission unit, the first control unit always biases the operation tool to the neutral position.
A biasing means is provided and the operating tool is held in a state where an operating force is applied to the side of the high-speed position or the low-speed position by maintaining the operating tool at the entering position, and the operating tool is set to the neutral position by setting to the cutting position. And a second urging means for urging the holding operation tool to the cut position, wherein the operation path of the operation tool is a linear neutral path forming the neutral position, and A high-speed path in which the high-speed position is formed on the side opposite to the neutral position in a posture orthogonal to the neutral path from one end position of the neutral path, and an anti-neutral in a posture orthogonal to the neutral path from the other end of the neutral path And a third urging means for urging the operating tool toward the low-speed path in the neutral path. The operation and effect are as follows.

[0007]

According to the above feature (claim 1), when the operating tool is set to the high speed position or the low speed position, the first of the transmission is set.
As a result of the belt tension of the transmission or the second transmission being increased, the power from the engine rotates at a high speed or
It is transmitted to the traveling transmission case at low speed and the aircraft travels.In this state, when the holding operation tool is held at the entering position, the operation tool is operated by the operation force from the holding operation tool to change the speed. While being operated in a direction to increase the tension of the belt of the apparatus, the belt is held at the operating position to maintain the transmission state, and when the holding operation tool is released in this state, the holding operation is performed by the urging force of the second urging means. The tool is operated to the cutting position, the operating tool is operated to the neutral position by the biasing force of the first biasing means, the transmission of power from the transmission to the travel system is interrupted, and the travel stops. In the non-operation state, the operation tool is located at the end of the neutral path on the low-speed path side, and if the holding operation tool is operated to the entry position in this state, the operation tool operates along the low-speed path to the low-speed position As a result The thing to be.

In other words, according to the present invention, at the time of work, by continuously operating the holding operation tool in a state where the shift position is set by the operation tool, the traveling can be performed without lowering the belt tension.
When the operator releases the holding operation tool, the traveling of the machine body is automatically stopped. Even when the holding operation tool is inadvertently operated to the entering position, the machine body does not run at high speed.

According to the second aspect, the operating tool can be operated with one hand and the holding operating tool can be operated with the other hand. Operation is possible.

[0010]

Accordingly, even in a vehicle equipped with a belt-type transmission which is also used as a clutch mechanism, the traveling is automatically stopped when the worker leaves, and the holding operation tool is continuously operated during work. Slip of the belt is suppressed to enable work with high transmission efficiency, and even if the holding operation tool is accidentally operated to the entering position, the aircraft does not run at high speed (claim 1), and the operation is quick and easy. The walking-type management machine capable of starting work (Claim 2) was rationally configured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an engine 3 is mounted on a frame 2 extending forward from a traveling transmission case 1 in a vertically long posture, and a belt-type engine is mounted over a side surface of the engine 3 and a side surface of the transmission case 1. A transmission A, and a hitch 5 for connecting the ground working device 4 to the rear surface of the transmission case 1;
Also, axles 6, 6 protruding left and right from the lower end of the transmission case 1.
Each has traveling wheels 7, 7 and a steering wheel 8 which is rotatable around an axis in a vertical position at the upper end of the transmission case 1. Further, a selection is made to select a traveling speed in a posture along the steering wheel 8. The walking type management device is provided with the lever 9.

The selection lever 9 is configured to switch between a gear type transmission (not shown) built in the transmission case 1 to select a forward traveling speed and a reverse traveling speed. Is the engine 3 as shown in FIG.
Output pulley 1 with small diameter and large diameter provided on output shaft 3A
0, 10 and the large diameter provided on the input shaft 1A of the transmission case 1,
Input pulleys 11 having a small diameter, endless belts 12 wound around respective pulleys, and endless belts 12
And tension pulleys 13, 13 for adjusting the tension of the first transmission unit 12.
And the second transmission portion T2 is configured on the side that performs low-speed rotation transmission.

As shown in FIGS. 1 and 2, the steering handle 8 has a pair of left and right handles 8B, 8B connected to the rear end position of a frame-shaped base member 8A. 8B end grips 14, 14
Are provided with side clutch levers 15, 15, a right handlebar 8A is provided with a shift lever 16 as an operating tool for operating the transmission A, and a left grip 1 is provided.
In the vicinity of 4, a deadman lever 17 as a holding operation tool is provided.
A throttle lever 18 for adjusting the rotational speed of the engine 3 is provided near the right grip 14.

The side clutch levers 15, 15 are
A side clutch (not shown) and a wire 1 built in a transmission case 1 for intermittently transmitting power to the left and right axles 6 and 6.
As shown in FIG. 8, the shift lever 16 is linked via a linear neutral path that forms a neutral position N, and a position perpendicular to the neutral path from one end position of the neutral path. And a low-speed path having a high-speed position H formed on the anti-neutral position side and a low-speed path having a low-speed position L formed on the anti-neutral position side from the other end of the neutral path in a posture orthogonal to the neutral path. While passing through the operation path 20A formed at
As shown in FIG. 5 and FIG. 5, a support shaft 21 rotatably supported by the transmission case 20 in which the operation path 20A is formed.
The left and right engaging members 24, 24, which are rotatably connected to the member 22 externally fitted to and fixed around the shaft member 23 in the lateral direction, and are freely supported by the support shaft 21 by the lateral swing. And is configured to be freely engageable.

As shown in FIG. 2 to FIG.
The lever 25 connected to a position outside the transmission case 20 of the support shaft 21 is provided with a first spring 26 as first urging means so that the transmission lever 16 returns to the neutral position N by the rotation of. A coil spring 27 as a third urging means for swinging the transmission lever 16 toward the low-speed path is externally fitted to the support shaft 21, and each of the engagement members 24, 24 has an arc-shaped link member 28. , 28, wires 29, 29, and spring 3
0, 30 via the first transmission T1 of the transmission A,
When the speed change lever 16 is operated to the high speed position H on the high speed path, the speed change lever 16 and the high speed side engagement member are linked to the swing arms 31 supporting the tension pulleys 13 of the second transmission portion T2. In the state in which the transmission lever 24 is engaged, the operating force from the shift lever 16 swings the swing arm 31 supporting the tension pulley 13 of the first transmission portion T1 to produce a high-speed running state, and the shift lever 16 is moved at a low speed. When the shift lever 16 is operated to the low speed position L on the path, the shift lever 16 and the low speed side engagement member 2
4, the operating force from the speed change lever 16 swings the swing arm 31 supporting the tension pulley 13 of the second transmission portion T2, and a low-speed running state appears.
When the operation of the shift lever 16 is released, the shift lever 16 returns to the neutral position N by the urging force of the first spring 26, and the transmission of the transmission A is cut off to stop the traveling of the aircraft.

As shown in FIG. 4 and FIG.
The stopper 32 for determining the operation end position of the shift case 6
In the case of manufacturing a transmission system having different specifications, the stopper 32 is not attached, and when the shift lever 16 is operated to the shift end, the link member 28 and the engaging member are not provided. 24 is operated to a position beyond the dead point DP as shown by a virtual line in FIG.
The high-speed running state and the low-speed running state can be maintained by the urging force of the first spring 26. When the stopper 32 is attached, the connection point between the link member 28 and the engagement member 24 cannot exceed the dead point DP, and the first spring 26
Always acts in the direction of operating the shift lever 16 to the neutral position N side.

As shown in FIG. 3, the dendman lever 17 includes a lever 25 connected to the support shaft 21 and a wire 3.
3, and the support shaft 21 is forcibly rotated by gripping with the grip 14 in a state where the shift lever 16 is held down by the palm from above, and the shift lever 16 is moved to the high-speed position H at the end of the high-speed path or to the low-speed position. It can be operated to the entry position "ON" which is maintained at the low-speed position L at the end of the path, and when the hand is released from the dendman lever 17, it returns to the cutting position "OFF" by the urging force of the first spring 26. At the same time, the shift lever 16 is returned to the neutral position N to stop traveling of the aircraft. The first spring 26 is connected to the dendman lever 17.
Is also used as a second spring that urges to the cutting position “OFF”.

As described above, in this management machine, the belt-type transmission A is also used as the main clutch mechanism, and the transmission lever 16
By holding the deadman lever 17 at the entering position "on" in a state where the traveling speed is selected in the above, the operating force from the deadman lever 17 is applied in a direction to increase the tension of the endless belt 12 of the transmission A to reduce the slip. When the worker releases the deadman lever 17, the transmission of the transmission A is cut off at the same time when the deadman lever 17 returns to the cut position "off". Driving stops automatically.

[Other Embodiments] In the present invention, in addition to the above embodiment, for example, it is possible to independently form a second urging means for urging the holding operation tool to the cutting position. It is also possible to form a loop and use a rod-shaped holding operation tool along the loop.

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 walking management machine.

FIG. 2 is a plan view of a rear end of a steering handle.

FIG. 3 is a side view showing an operation system of a deadman lever.

FIG. 4 is a longitudinal sectional side view of a transmission case.

FIG. 5 is a longitudinal rear view of the transmission case.

FIG. 6 is a side view of the transmission.

FIG. 7 is a perspective view of an operation system of a swing arm of the transmission.

FIG. 8 is an exploded perspective view of an operation system of a shift lever.

[Explanation of symbols]

 Reference Signs List 1 transmission case 3 engine 8 steering handle 12 belt 16 operating tool 17 holding operating tool 26 first urging means, second urging means 27 third urging means A transmission H high speed position L low speed position N neutral position T1 first Transmission part T2 Second transmission part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-80720 (JP, U) JP-A 56-150622 (JP, U) JP-A 62-8832 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B60K 28/00-28/16 B62D 51/06 110 B60K 17/08

Claims (2)

(57) [Claims] 1. A belt-type transmission (A) for transmitting power from an engine (3) to a transmission case (1) for traveling,
First operation by operating the single operation tool (16) to the high-speed position (H)
The tension of the belt (12) of the transmission unit (T1) is increased to perform high-speed rotation transmission, and the belt (12) of the second transmission unit (T2) is operated by operating the operation tool (16) to the low-speed position (L). )
A walking type management machine configured to increase the tension of the gear and to perform transmission of low-speed rotation, and not to transmit power to the first and second transmission parts by operating the operation tool (16) to the neutral position (N). And a first urging means (26) for constantly urging the operating tool (16) to the neutral position (N), and maintaining the operating tool (16) at the high-speed position by maintaining the operating tool (16) at the entering position. (H) or a holding operating tool (17) for holding the operating force applied to the side of the low speed position (L) and operating the operating tool (16) to the neutral position (N) by setting the cutting position. And a second urging means (2) for urging the holding operation tool (17) to the cutting position.
6) , wherein the operation path of the operation tool (16) is
A linear neutral path forming the standing position (N), and the neutral path
From one end of the path in a position perpendicular to the neutral path
High-speed path with the high-speed position (H) formed on the anti-neutral position side
And a view perpendicular to the neutral path from the other end of the neutral path
Low speed with the low speed position (L) formed on the anti-neutral position side by force
And the path is formed in a U-shape.
Third biasing means (27) for biasing the vertical path toward the low-speed path
Walk-type management machine comprising: 2. The operating tool (16) and the holding operating tool.
(17) and the left side of the operation handle (8) of the walking management machine.
2. The walking management device according to claim 1, wherein the management device is distributed to the right grip .