JPH0620384B2 - Clutch operation structure of walking type agricultural machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention oscillates and supports an arch-type clutch handle on an arch-type steering handle, and moves the grip of the clutch handle closer to the grip of the steering handle. By doing so, the present invention relates to a clutch operation structure of a traveling agricultural machine configured to be engaged with a clutch.

[Conventional technology]

An example of a structure for operating and disengaging a work clutch and a traveling clutch in a traveling agricultural machine is disclosed in Japanese Utility Model Laid-Open No. 59-68047.

In this traveling type agricultural machine, an arch type steering handle, an arch type traveling clutch handle and a working clutch lever are independently swingably supported, and the traveling clutch handle and the traveling clutch are released. The work clutch lever and the work clutch are linked by a release wire or the like.

[Problems to be solved by the invention]

With the above-described structure, the traveling clutch is disengaged when the grip portion of the traveling clutch handle is placed rearward of the grip portion of the steering handle.

Therefore, when moving the traveling agricultural machine by hand with the traveling clutch disengaged, or when manually operating with only the work clutch engaged, the operator standing behind the traveling agricultural machine should move the arch-type traveling machine. You will grab the steering wheel through the clutch handle.

When the steering handle is gripped in this way, the grip of the traveling clutch handle may hit the operator's arm or wrist, which may hinder the operation.

It is an object of the present invention to configure the traveling agricultural machine as described above so that the traveling clutch handle does not hinder the operation when the traveling clutch is disengaged.

[Means for solving problems]

A feature of the present invention is that an arch-shaped clutch handle is swingably supported on an arch-shaped steering handle, and a clutch handle is operated by moving a grip portion of the clutch handle closer to a grip portion of the steering handle. The traveling-type agricultural machine clutch operating structure is configured as follows.

There is provided a first switching mechanism for switching the clutch handle and the work clutch to a linked / non-linked state, and a second switching mechanism for switching the clutch handle and the traveling clutch to a linked / non-linked state.

[Work]

In the present invention, the traveling clutch handle and the working clutch lever of the conventional traveling agricultural machine are combined into one arch-shaped clutch handle.

In the present invention, the first switching mechanism and the second switching mechanism are
By switching to the linked / non-linked state, one clutch handle can be used to perform on / off operations of the traveling clutch and the working clutch on one side or both of them simultaneously.

Thereby, for example, when moving the traveling agricultural machine by pushing the traveling clutch in the disengaged state, the first and second switching mechanisms are set in the non-coupling state, and when only the working clutch is engaged and the work is performed by hand, The first linkage mechanism may be in the linkage state and the second linkage mechanism may be in the non-linkage state.

Therefore, according to the present invention, in the above two states, the operation can be performed by grasping the steering handle while the clutch handle is being moved close to the steering handle.
In the state, unlike the conventional traveling type agricultural machine, the grip portion of the traveling clutch handle does not hit the arm or wrist of the operator and hinder the operation.

〔The invention's effect〕

As described above, the traveling clutch handle and the working clutch lever are combined into one arch-shaped clutch handle, and the first and second switching mechanisms are provided, so that the traveling clutch can be used like a conventional traveling agricultural machine. It was possible to improve the operability of the traveling agricultural machine because the grip of the handle did not hit the operator's arm or wrist and interfere with the operation.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 shows a traveling lawnmower which is an example of a traveling agricultural machine to which the present invention is applied. This traveling lawnmower is provided with a pair of left and right front wheels (1) and rear wheels (2), and a cutting blade housing in which the cutting blade (3) is installed so as to rotate around the vertical axis (P ₁ ).
The engine (5) is mounted on the upper side of (4). Then, the power of the engine (5) is transmitted to the cutting blade (3) through the cutting blade clutch (10) (corresponding to a working clutch), and the disc type continuously variable transmission (16) and the differential mechanism (18) are transmitted. ) And a loop-shaped steering handle (6) and a grass container (7) at the rear of the blade housing (4).

Next, the structure around the steering wheel (6) to which the present invention is applied will be described. As shown in Fig. 1 and Fig. 2, the throttle lever (24) of the engine (5) is installed in the arch part of the steering handle (6), and the arch-shaped clutch handle is installed.
(8) is swingably supported around the horizontal axis (P ₂ ). One side of the clutch handle (8) with a generally U-shaped bracket (9)
Fixed, and the reverse J-shaped engaging member (11) is vertically movably mounted in the hole formed in the longitudinal direction of the bracket (9), and the engaging member (11) is fixed by the spring (12). 11) is urged toward the downward protruding side. Then, the J-shaped head of the engaging member (11) is brought into contact with the upper surface of the bracket (9) so that the engaging member (11) can be held on the upper retracted side.

The cutting blade clutch operating arm (14), which is interlocked with the cutting blade clutch (10) and the release wire (13), swings at the horizontal axis (P ₂ ) below the engaging member (11). The clutch handle is movably supported by engaging the engagement member (11) with the cylindrical engagement portion (14a) fixed to the support boss portion of the cutting blade clutch operation arm (14). The first switching mechanism (15) for switching the clutch handle (8) and the cutting blade clutch (10) into a linked / non-linked state by allowing the (8) and the cutting blade clutch operating arm (14) to swing together. ) Is composed.

As a result, the engaging member (11) is moved to the cutting blade clutch operation arm (1
4) Engage in the engagement part (14a) of the clutch handle
The cutting blade clutch (10) is turned on and off by swinging (8) toward and away from the steering handle (6).

Inside the bracket (9) side of the clutch handle (8)
An engaging member (21) that is slidable in the vertical direction and biased by a spring (20) is installed on the upper side. As shown in FIG. 3, a traveling clutch operating arm (19) is swingably supported concentrically with the cutting blade clutch operating arm (14) below the engaging member (21). (19) and a traveling clutch (not shown) are interlockingly connected via a release wire (17).

As a result, the traveling clutch button (22) provided on the upper portion of the clutch handle (8) is pushed, the engaging member (21) is projected downward, and fixed to the support boss portion of the traveling clutch operation arm (19). While the lower end of the engaging member (21) is abuttingly engaged with the engaging portion (19a), the clutch handle (8) is swung toward and away from the steering handle (6) so that the traveling clutch (8) (Not shown) is turned on and off. As described above,
A second switching mechanism (23) for switching the clutch handle (8) and the traveling clutch to a linked / unlinked state.

In this case, when the lower end of the engaging member (21) is engaged with the engaging portion (19a) of the traveling clutch operation arm (19), the engaging action resists the upward biasing force of the spring (20). The engaging member (21)
The engaged state between the engaging portion (19a) and the engaging portion (19a) is maintained.

When the engaging member (21) is projected downward at the clutch disengaged position of the clutch handle (8), as shown in FIG.
The lower end of (21) and the engaging portion (19) of the traveling clutch operating arm (19).
There is some space between a). As a result, when the first switching mechanism (15) is in the linked state and the clutch handle (8) is swung toward the steering handle (6) while the traveling clutch button (22) is being pressed as described above, the cutting blade clutch is first operated. After the (10) is in the engaged state, the lower end of the engaging member (21) contacts the engaging portion (19a), and the traveling clutch is in the engaged state. In this way, there is no uncut material, and no sudden load is applied to the engine (5).

INDUSTRIAL APPLICABILITY The present invention can be applied not only to a self-propelled traveling lawnmower, but also to a traveling agricultural machine having a work clutch and a traveling clutch, such as a rotary tiller and a mower.

[Brief description of drawings]

The drawings show an embodiment of a clutch operating structure for a walk-behind agricultural machine according to the present invention. FIG. 1 is a front view of a steering handle and a clutch handle, FIG. 2 is a side view of the steering handle and the clutch handle, and FIG. 1 is a side view showing a running clutch engaged state as seen from the direction AA in FIG. 1, FIG. 4 is a side view showing a running clutch disengaged state as seen from the direction AA in FIG. 1, and FIG. It is the whole side view of a mower. (6) …… Steering wheel, (8) …… Clutch handle, (1
0) …… Work clutch, (15) …… First switching mechanism, (23) ……
Second switching mechanism.

Claims (1)

[Claims] 1. A clutch handle in which an arch type clutch handle (8) is swingably supported by an arch type steering handle (6).
A clutch operating structure of a walk-type agricultural machine, which is configured to be engaged by a clutch by moving the grip of (8) closer to the grip of the steering handle (6), the clutch handle (8) and A first switching mechanism (15) for switching the working clutch (10) to a linked / non-linked state, and a second switching mechanism (23) for switching the clutch handle (8) and the traveling clutch to a linked / non-linked state. The clutch operation structure of the walking type agricultural machine provided.