JPS5934524Y2 - Tractor PTO clutch operating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a PTO clutch operating device for a tractor, and aims to enable the PTO clutch to be operated by hand from near the side of the driver's seat, and to simplify the mechanism.

There is a tractor in which the running latch and the PTO clutch are made independent, and the running latch can be independently engaged and engaged by pedal operation and the PTO clutch by lever operation, and this is very convenient for pasture work.

However, in the past, the PTO clutch lever was placed in front of the driver's seat and could swing up and down using its front end as a fulcrum, and when disengaging the PTO clutch, the user had to grasp the rear end of the PTO clutch lever. Since the PTO is pulled upward by the user, it is necessary to lean forward, etc.
There was a problem in that the clutch lever was not easy to operate and was difficult to operate.

This is I/'1PTO clutch lever as much as possible.
This is due to the fact that it is arranged near the clutch to simplify the interlocking mechanism between the two.

The present invention solves the above conventional problems,
The feature is that the PTO clutch lever is placed near the side of the driver's seat, and a relay bracket is fixed to the rear axle case near the bottom of the PTO clutch lever by co-tightening, and the relay bracket is pivotally supported by the relay bracket. The PTO clutch and the PTO clutch lever are interlocked via a relay link.

Hereinafter, the present invention will be described in detail with respect to the illustrated embodiments.
In the figure, reference numeral 1 denotes a tractor body, which is composed of an engine 2, a clutch housing 3, a transmission case 4, etc. as a structure, and a latch 5 that runs inside the clutch housing 2.
and a PTO clutch 6 are built in, and a brake case 7, a rear axle case 8, etc. are fastened to both rear sides of the transmission case 4 with mounting bolts 9, as shown in FIG.

A planetary speed reducer 10 is built into the inner end of the rear axle case 8, and a rear wheel 12 is driven from the planetary reducer 10 via an output shaft 11.

The running latch 5 is interlocked and connected to a running latch pedal 16 via a clutch lever shaft 13, a clutch lever 14, a clutch roller 15, etc., and can be operated on and off by this running latch pedal 16.

111/'j: Steps placed on both sides of the center of the tractor vehicle body 1, as shown in FIG. Vibration isolating materials 20 and 21 as appropriate depending on the stand 19
Supported through.

22 is a hydraulic system for lifting and lowering the working machine, and 23 is a driver's seat, which is arranged above the hydraulic system 22.

A floor cover 24 covers the lower part of the driver's seat 23, and is provided between a pair of left and right rear wheel fenders 25, as shown in FIG.

26 is a PTO clutch lever arranged between the driver's seat 23 and the rear wheel fender 25, and as shown in FIGS. Mounting part 2
8, each of which is pivoted to a mounting base 30 by a horizontal shaft 29 at its mounting portion 28 so as to be vertically movable.

The mounting base 30 is a plate-shaped member inserted between the two-pronged mounting portions 28, and its front and rear mounting legs 31 and 32 are bent in opposite directions and attached to the floor cover by means of poles 33 and 34. It is fastened to 24 mag.

Further, a plurality of ratchet teeth 35 are formed on the front edge side of the mounting base 30 on an arc centered on the horizontal axis 29, and a ratchet 71 [36
is pivotally supported on the mounting portion 28 by a support shaft 51.

The ratchet pawl 36 can be engaged and disengaged by an operating knob 38 via a rod 3T inserted into the PTO clutch lever 26, and a coil spring 3 installed inside the grip part 27
9 in the engagement direction.

In addition, the ratchet teeth 35 and ratchet pawls 36Fi, P
A ratchet mechanism is configured to lock the TO clutch lever 26 in a clutch disengaged position A and a clutch engaged position B, respectively.

There is an inverted U-shaped fitting 40 on the PTO clutch lever 26.
is fixedly installed, and a clutch rod 42 is connected to the fixture 40 via a connecting pin 41.

43 is a relay bracket placed near the bottom of the PTO clutch lever 26, and as shown in FIG. The brake case 1, the rear axle case 8, etc., and the transmission case 4 are aligned with each other by mounting bolts 9.

A bell crank-shaped relay link 45 is pivotally attached to the protruding end side of the relay bracket 43 via a pivot shaft 44, and one end of the relay link 45 is connected to the clutch rod 42, and the other end is connected to the clutch rod 46. has been done.

The clutch rod 42 is arranged in a slightly inclined state downward on the road, and the clutch rod 46 is arranged in the longitudinal direction passing under the step 17, and this clutch rod 46 is connected to the clutch lever 47 and the clutch lever shaft. 48
It is interlocked with the PTO clutch 6 via.

Reference numeral 49 denotes a return spring, which is suspended between the front pedestal 18 and the clutch lever 47.

50 is an insertion hole for the clutch rod 42.

The following two effects will be explained.

The PTO clutch lever 26Iri is now in the clutch connection position B, and the PTO clutch 6 is in the connected state.

Therefore, when disengaging the PTO clutch 26, the grip portion 27 is grasped and the PTO clutch lever 26 is pulled up around the horizontal shaft 29 to the clutch disengagement position A.

In this case, the PTO clutch lever 26 is located on the side of the driver's seat 23 and is movable up and down about the horizontal axis 29 at the rear end as a fulcrum, and the grip part 26 is located near the front end of the driver's seat 23. Therefore, the driver can shift the PTO clutch lever while sitting in the driver's seat 23 without taking an unreasonable posture.
26 can be operated and is very easy to operate.

When the PTO clutch lever 26 is pulled up, the relay link 45 rotates counterclockwise around the pivot shaft 44 via the clutch rod 42 and pulls the clutch rod 46 rearward, so that the clutch lever 41 releases the return spring. 49 and rotates counterclockwise together with the clutch lever shaft 48, thereby disengaging the PTO clutch 6.

Furthermore, when the PTO clutch lever 26 is pulled up to the clutch disengagement position A, the ratchet pawl 36 engages with one of the ratchet teeth 35 corresponding to that position, locking the PTO clutch lever 26 at that position. The PTO clutch 6 is maintained in the disconnected state.

To reconnect the PTO clutch 6'Jk, press the operating knob 38 and the ratchet pawl 36 will engage the ratchet teeth 35.
After that, all you have to do is return the PTO clutch lever 26 to the clutch connection position B.

In this invention, the PTO clutch lever is placed near the side of the driver's seat, so when the driver engages in and engages the PTO clutch, the driver can easily operate the PTO clutch lever without taking an awkward posture. Hand operation of the PTO clutch is very easy.

In addition, if the PTO clutch lever is installed near the side of the driver's seat, the distance between the PTO clutch and the PTO clutch will become longer and there is a risk that the interlocking mechanism will become more complicated. Since the clutch link is placed near the bottom and the PTO clutch and PTO crunch lever are linked via this relay link, the structure is simplified, such as being able to use clutch rondes in the vertical and longitudinal directions. can.

Moreover, since the relay bracket supporting the relay link is collinear with the rear axle case, no special mounting means is required.

[Brief explanation of drawings]

The drawings illustrate one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a sectional view of the rear axle, FIG. 3 is a rear view of a part of the clutch lever, and FIG. 4 is a front view of the main part. , FIG. 5 is a sectional view of a part of the PTO clutch lever, and FIG. 6 is an enlarged view taken along the line X--X. 1...Tractor body, 6...PTO crunch, 8...Rear axle case 23...
Driver's seat, 26...PTO clutch lever-130
...Mounting base, 42゜46...Clutch rond, 43...Relay bracket, 45...
...Relay link.

Claims (1)

[Scope of utility model registration request] The PTO clutch lever is placed near the side of the driver's seat, and a relay bracket is fixed to the rear axle case near the bottom of the PTO clutch lever by co-tightening, via a relay link pivotally supported by the relay bracket. A PTO clutch operating device for a tractor, characterized in that a PTO clutch and a PTO clutch lever are interlocked.