JP3599545B2 - Clutch operating device for walking type working machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a manual clutch lever for engaging and disengaging a traveling clutch is attached to a steering handle for a walking worker extending rearward so as to protrude upward from the steering handle, and a grip portion of the steering handle is gripped. A walk-behind working machine such as a management machine having a second manual clutch lever for engaging and disengaging the traveling clutch, and a display plate for displaying the operating position of the manual clutch lever with the manual clutch lever as a guide. A clutch operating device.
[0002]
[Prior art]
This type of walk-behind work machine includes a manual clutch lever that projects upward from the steering handle and has good operability, and a second manual clutch lever that can be operated while holding the grip portion of the steering handle. There is an advantage that operability can be improved by diversifying operation modes for the traveling clutch.
[0003]
Conventionally, as a clutch operating device for a walking-type working machine having such advantages, a manual clutch lever has been permanently provided on a control handle.
[0004]
[Problems to be solved by the invention]
However, according to the above-described conventional technique, when working under a tree such as undergrowth cutting in an orchard, the manual clutch lever protrudes above the steering handle so that the manual clutch lever is protruded from a tree branch. There is a possibility that the traveling clutch may be unexpectedly operated by being hooked.
[0005]
An object of the present invention is to perform a good clutch operation using the manual operation lever and the second manual operation lever at the time of a work in which there is no possibility of the manual clutch lever being caught, but at the time of work under a tree, the traveling clutch may be unexpectedly operated. The point is to surely prevent the cutting operation.
[0006]
[Means for Solving the Problems]
The features, operations and effects of the first invention according to claim 1 are as follows.
[0007]
〔Characteristic〕
A manual clutch lever for engaging and disengaging the traveling clutch is mounted on the steering handle for a walker extending rearward so as to protrude above the steering handle, and the travel clutch is gripped while the grip portion of the steering handle is grasped. A clutch operating device for a walk-behind type working machine, wherein a second manual clutch lever for on / off operation of the manual clutch lever is attached, and a display plate for displaying an operating position of the manual clutch lever is attached using the manual clutch lever as a guide. A portion of the manual clutch lever projecting above the steering handle is detachably configured, and a pointer for displaying an operation position of the second manual clutch lever in cooperation with the display plate is separately provided from the manual clutch lever. The point is that it is provided.
[0008]
[Action]
According to the first aspect of the invention, by removing the upwardly projecting portion of the manual clutch lever, it is possible to prevent the manual clutch lever from projecting above the steering handle. By removing the upwardly projecting portion of the lever, it is possible to prevent the manual clutch lever from being caught on a branch or the like and accidentally disengaging the traveling clutch.
[0009]
In addition, since the second manual clutch lever is provided on the steering handle, the operation of the traveling clutch via the manual clutch lever becomes impossible by removing the upwardly protruding portion of the manual clutch lever. By operating, the traveling clutch can be arbitrarily turned on and off.
[0010]
By the way, the operation position of the manual clutch lever can use the manual clutch lever as a pointer , but in the present invention, a pointer is provided separately from the manual clutch lever, and a display plate for displaying the operation position is provided. The operation position of the second manual clutch lever can also be displayed by providing the manual clutch lever or the operation position of the pointer on the display plate if the manual clutch lever projects above the steering handle. You can know . In addition, a hand that indicates the operation position of the second manual clutch lever in a state where the upwardly protruding portion of the manual clutch lever is removed in cooperation with a display plate for displaying the operation position of the manual clutch lever is referred to as a manual clutch lever. Since it is provided separately, it is possible to know the state of the traveling clutch in a state where the upwardly protruding portion of the manual clutch lever is removed, and it is only necessary to improve only the provision of the pointer.
In addition, since a pointer is provided separately from the manual clutch lever, the pointer performance can be used as a pointer for a function that is considered first.
[0011]
〔effect〕
Therefore, according to the first aspect of the present invention, normally, it is possible to exhibit good clutch operability adapted to the working conditions using the manual clutch lever and the second manual clutch lever, but also to travel while working under a tree. The clutch can be reliably prevented from being accidentally disengaged, and the clutch operability at that time can be favorably maintained with a simple structure.
Further, the operation position of the second manual clutch lever in a state where the upwardly protruding portion of the manual clutch lever is removed can be displayed with good reliability.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIGS. 1 and 9, the walking type work machine is configured by assembling an engine 4 and a steering handle 5 for a walking worker extending rearward to a transmission case 3 in which a tilling rotor 2 is mounted on each of left and right axles 1. It is configured.
[0013]
As shown in FIGS. 9, 10 and 11, the cultivating rotor 2 has a cultivating shaft 6 fitted to the axle 1 in a non-rotating state via a pin 7 to prevent the cultivating shaft 2 from coming off. Two plate-shaped brackets 8A and 8B are fixed at intervals in the direction, and a plurality of cultivating claws 9 in the circumferential direction are fixed to each of the brackets 8A and 8B via bolts and nuts 10, and are fixed to the cultivating shaft 6. The two rod-shaped anti-winding devices 11 in the circumferential direction for preventing winding of grass and the like are mounted in a state extending between the brackets 8A and 8B. The extension shaft 13 to which the rotor disk 12 is mounted is fixed by a pin 14 so as to be prevented from rotating and coming off.
The anti-winding device 11 is attached such that the inner end is ahead of the outer end with the rotation, and the mounting means forms a hole 15 through which the anti-winding device 11 is inserted into the brackets 8A and 8B. This is means for preventing the anti-winding device 11 from being pulled out through a pin 16 which can be inserted and removed and a flange 17 fixed to the anti-winding device 11 with the anti-winding device 11 inserted through the hole 15. In other words, by pulling out the pin 16, the anti-winding device 11 can be pulled out.
The rotor disk 12 is provided with an operation extraction hole 18 for extracting the winding prevention tool 11 outward.
The extension shaft 13 is configured such that an axle 20 of an auxiliary wheel 19 for running on a road or the like with the tilling claw 9 floated can be inserted and mounted. The means for attaching the fixing pin 21 in the positioning state and the rotation preventing state is a means for inserting the fixing pin 21 over the extension shaft 13 and the axle 20 and holding the inserted state with the retaining pin 22. As shown in FIG. 12, the means for aligning the auxiliary wheel 19 with respect to the extension shaft 13 is such that the axle 20 is brought into contact with the end of the extension shaft 13 by contacting the end of the extension shaft 13 with the axle 20. A positioning plate 23 for positioning in the axial direction is fixed, a headed pin 24 is fixed to the positioning plate 23, and the head 24a of the headed pin 24 is inserted in a state where the circumferential position of the axle 20 with respect to the extension shaft 13 is shifted. The shaft 25 b of the head pin 24 a is inserted into the extension shaft 13 so as to allow rotation of the axle 20 with respect to the extension shaft 13 in a state where the head 25 a of the head pin 24 is inserted through the hole 25 and the head 25. When the formed pin hole 13a and the pin hole 20a formed in the axle 20 are aligned in the circumferential direction, the pin hole 20a comes into contact with the shaft portion 24b to prevent the axle 20 from rotating with respect to the extension shaft 13. Rotadis A means for forming a 12. That is, the axle 20 is inserted into the extension shaft 13 so that the head 24a passes through the hole 25 and the positioning plate 23 contacts the end of the extension shaft 13, and in this state, the shaft portion 24b is inserted into the end of the elongated hole 26. This is a means for matching the pin holes 13a and 20a by rotating the axle 20 with respect to the extension shaft 13 so as to abut. In addition, the long hole 26 is provided in both the circumferential direction from the hole 25 so that the left auxiliary wheel 19 can be attached to the right extension shaft 13 and the right auxiliary wheel 19 can be attached to the left extension shaft 13. The extension is formed.
[0014]
The transmission case 3 includes a transmission 28 operated by a shift lever 27 extending rearward, and left and right axles of shift power operated by steering levers 29a mounted on left and right handle bars 5A of the steering handle 5, respectively. Left and right steering clutches 29 for transmitting and receiving the power to the steering wheel 1 are separately provided.
[0015]
The transmission system from the engine 4 to the transmission 28 is provided with a belt tension type traveling clutch 30 between the output shaft 4a of the engine 4 and the input shaft 28a of the transmission 28. The traveling clutch 30 is urged to cut off the transmission.
[0016]
As shown in FIGS. 2 to 8, a device for operating the traveling clutch 30, that is, a clutch operating device is mounted on a bracket B attached to one handle rod 5 </ b> A around a first left-right axis X <b> 1. The manual clutch lever 31 which can swing freely is attached so that its grip operating portion 31a protrudes above the handle rod 5A, and the second left-right axis X2 is rotated while the grip portion 5a of the handle rod 5A is gripped. A second manual clutch lever 32 that swings up and down is attached, and a display plate 33 that displays the operating position of the manual clutch lever 31 is attached by using the manual clutch lever 31 as a pointer. When the vehicle is in the forward engagement position P1, the traveling clutch 30 is in the engaged state and the manual clutch lever 31 is in the rear engagement position P2. A first interlocking means for interlocking the manual clutch lever 31 and the tension arm 30A of the traveling clutch 30 so that the traveling clutch 30 is disengaged when the second clutch is engaged, and the second manual clutch lever 32 is positioned at the lower engagement position p1. The manual clutch lever 31 and the second clutch lever 31 are positioned such that the manual clutch lever 31 is located at the engagement position P1 and the second manual clutch lever 32 is located at the upper disengagement position p2 when the manual clutch lever 31 is located at the disengagement position P2. Second interlocking means for interlocking the manual clutch lever 32 is provided.
That is, the traveling clutch 30 is switched to the on state by operating the manual clutch lever 31 to the on position P1, and the traveling clutch 30 is switched to the off state by operating the manual clutch lever 31 to the off position P2. By operating the lever 32 to the on position p1, the manual clutch lever 31 is swung to the on position P1 to switch the traveling clutch 30 to the on state, and by operating the second manual clutch lever 32 to the off position p2, the manual clutch is operated. The travel clutch 30 is switched to the disengaged state by swinging the lever 31 to the disengagement position P2.
[0017]
The first interlocking means is provided with a release wire 35 for pulling the tension arm 30A to the on position via a spring 34, and the release wire 35 is moved in accordance with the manual clutch lever 31 swinging from the off position P2 to the on position P1. A curved link 36 is provided to link the end of the inner wire 35a to the manual clutch lever 31 so as to pull the inner wire 35a. The pivotal connection portion 37 between the manual clutch lever 31 and the curved link 36 includes a portion where the inner wire 35a extends from the outer wire 35b when the manual clutch lever 31 is located at the disengagement position P2, and a first left-right axis X1. When the manual clutch lever 31 is located at the engagement position P1, it is set so as to be located near the straight line L and above the straight line L when the manual clutch lever 31 is located at the engagement position P1. That is, when the manual clutch lever 31 is located at the entry position P1, a pulling force is applied to the manual clutch lever 31 via the release wire 35 so as to swing beyond the entry position P1. Further, a stopper 38 is provided for holding the manual clutch lever 31 at the ON position P1 against the pulling force by coming into contact with the manual clutch lever 31.
[0018]
The second interlocking means attaches a roller 39 to the manual clutch lever 31, and moves the manual clutch lever 31 from the on position P1 to the off position P2 with the swing of the second manual clutch lever 32 from the on position p1 to the off position p2. And engages with the roller 39 so that the manual clutch lever 31 swings from the off position P2 to the on position P1 as the second manual clutch lever 32 rocks from the off position p2 to the on position p1. The engaging portion 40 is formed on the second manual clutch lever 32. The engagement portion 40 is formed as an elongated hole that causes the roller 39 to approach the second left-right axis X2 as the pivotal connection portion 37 approaches the straight line L as the manual clutch lever 31 swings. . In other words, of the swinging of the manual clutch lever 31 accompanying the swinging of the second manual clutch lever 32, the second left and right direction of the second manual clutch lever 32 at the time of swinging when the pivot support connecting portion 37 passes through the straight line L. The ratio of the distance L2 from the second left-rightward axis X2 to the roller 39 to the distance L1 from the axis X2 to the operation portion 32a is reduced, and the pivotal connection 37 is required for swinging when passing through the straight line L. The operating force is set to be smaller than the operating force required for swinging at other points.
[0019]
The manual clutch lever 31 has a proximal end portion 31A attached to the handle rod 5A so as to swing around the first left-right axis X1 without protruding above the upper surface of the handle rod 5A. An operating rod portion 31B with a grip operating portion 31a screwed and mounted on a nut N fixed to the portion 31A. That is, the operation rod portion 31B protruding above the handle rod 5A is configured to be detachable. RN is a lock nut.
[0020]
A plate-shaped indicator 41 for displaying the operating position of the second manual clutch lever 32 is attached to the base end portion 31A in cooperation with the display plate 33 with the operating rod portion 31B removed.
[0021]
[Another embodiment]
In the above embodiment, the pointer 41 is separately provided, but the base end portion 31 may be projected upward and used as the pointer 41.
[0022]
In the above-described embodiment, the walking type working machine in which the cultivating rotor 2 is mounted on the axle 1 is shown. However, the present invention is also applied to the walking type working machine in which the working device such as the tilling rotor is mounted on the rear part of the transmission case 3. can do.
[Brief description of the drawings]
FIG. 1 is a side view. FIG. 2 is a cutaway side view of a clutch operating device with a manual clutch lever in a clutch disengaged state. FIG. 3 is a cutaway side view of a clutch operating device with a manual clutch lever in a clutch engaged state. FIG. 5 is a cutaway side view of a clutch operating device without a manual clutch lever in a clutch disengaged state. FIG. 5 is a longitudinal sectional view of a clutch operating device without a manual clutch lever in a clutch engaged state. FIG. 8 is a plan view showing the arrangement of the clutch operating device. FIG. 9 is a rear view of the tilling device. FIG. 10 is an exploded perspective view of the cultivating device. Longitudinal side view of [Figure 12] Longitudinal side view of main part of tillage device
5 Control handle 5a Handle 30 Running clutch 31 Manual clutch lever 31B Part 32 Second manual clutch lever 33 Display plate 41 Pointer

Claims (1)

A manual clutch lever (31) for engaging and disengaging the traveling clutch (30) is attached to a steering handle (5) for a walking worker extending rearward so as to protrude above the steering handle (5). A second manual clutch lever (32) for engaging and disengaging the traveling clutch (30) is attached with the grip (5a) of the handle (5) being gripped, and the manual clutch lever (31) is used as a guide. A clutch operating device for a walk-behind type working machine having a display plate (33) for displaying an operation position of the manual clutch lever (31), wherein the manual clutch lever (31) has a position higher than a steering handle (5). An upwardly projecting portion is configured to be detachable, and displays an operation position of the second manual clutch lever (32) in cooperation with the display plate (33). Wherein the needle (41) the manual clutch lever (31) walk-behind working machine of a clutch operating apparatus that is provided separately from the.

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