JPH083221Y2 - Connecting device between tractor and drive type working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a coupling device between a tractor and a drive type working machine, for example, a beach cleaner is coupled to the tractor via a link type half-mount coupling device. Used to.

(Prior Art) There are traction type, semi-mounting type, direct mounting type, etc. for connecting a work machine to a tractor. Among them, a beach cleaner that picks up and collects empty cans, garbage, etc. at a beach is a tractor. In addition, the towed member of the working machine is swingably connected via the link type connecting body, and the PTO shaft of the tractor 1 and the PIC shaft of the working machine are interlockingly connected via the joint shaft.

(Problems to be solved by the invention) By the way, in the conventional technique, when the lower link is raised, the towed member hits the joint shaft and breaks the hitch pin or the like.

Also, during towing work, when the vehicle travels meandering or makes a sharp turn, the top link work machine connection part is twisted,
There was a risk that abnormal noise would occur on the joint shaft, or the joint shaft would come off.

Therefore, in the present invention, by providing an intermediate bearing body on the working machine side and devising the top link connecting portion, abnormal noise is prevented even if a joint shaft is used, and at the same time, the turning is made smooth. With the goal.

(Means for Achieving the Object) In the present invention, the link bar 8 at the rear end of the link type connecting body 9 provided at the rear portion of the tractor 1 is provided with the protruding end of the towed member 15 protruding forward from the working machine 10. The tractor 1 is connected via a hitch pin 16 so as to be swingable in the left-right direction.
The rear PTO shaft 4 and the front PIC shaft 17 of the working machine 10 are interlockedly connected to each other through the front and rear joint shafts 36 and 37 with the intermediate bearing body 24 interposed therebetween to achieve the above object. In order to do so, the following technical measures are being taken.

That is, according to the present invention, the intermediate bearing body 24 is provided in the front-rear direction of the front PIC shaft 17 and at the central portion in the left-right direction of the towed member 15 near the hitch pin 16 so as to be swingable in the front-rear direction. A top link connector 32 that is swingable in the left-right direction is provided on the upper part of the bearing body 24, and the rear portion of the top link 5 in the link-type connector 9 is connected to the top link connector 32. It is a thing.

(Operation) When the lower ring 6 which is a part of the link type connecting body 9 is raised, the intermediate bearing body 24 is tilted forward by the top link 5 with the pin 23 as a fulcrum.

As a result, the joint shaft 36 may come off or the towed member
Contact with 15 is prevented, and abnormal noise is suppressed.

Also, when the vehicle suddenly turns, the top link connector 32 is swung, and the reduced distance between the intermediate bearing body 24 and the link bar 8 is escaped by the lateral rotation to avoid contact with the joint shaft 36. .

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2, 1 is a wheel type tractor, and a hydraulic device 3 having a pair of left and right lift arms 2,
It has a PTO shaft 4, a top link 5, and a pair of left and right lower links 6, and connects each lift arm 2 and lower link 6 with a lift rod 7 and links a pair of left and right lower links 6 together. By connecting with the bar 8,
The link type connection body 9 is configured.

10 is a drive type work machine, and in this example, a pickup unit 11
It is shown by a beach cleaner having at least a pick-up transfer conveyor 12 having and a container 13 provided at the transfer end of the conveyor 12, and has a towed member 15 projecting forward in the front center part of the chassis 14. The tip of the towed member 15 is swingably and detachably connected to the link bar 8 via a hitch pin 16.

Further, a transmission case 18 having a PIC shaft 17 protruding forward is provided at the front center of the chassis 14, and the transmission case 18 is provided.
The output shaft 19 is linked to the conveyor 12 via a side transmission case 20.

Referring also to FIGS. 4 to 7, a support base 21 is fitted in the middle of the towed member 15 and can be slidably fixed by a bolt 22, and a pin 23 is provided on the top of the support base 21. An intermediate bearing body 24 is attached which is movable back and forth around.

The intermediate bearing body 24 includes a pair of plate members 25, and a cylindrical base 26 fixed between the pair of plate members 25, and a spline shaft extending in the front-rear direction to the cylindrical body 26 via a bearing 27.
It has 28A and 28B rotatably. In addition, 29 is a stopper for restricting forward inclination, and 30 is a reinforcing rib plate.

A vertical axis 31 is projected on the intermediate bearing body 24.
A swingable top link connector 32 is fitted around the center.

The top link connector 32 has a pair of plate members 34 fixed to the cylindrical boss 33, and has a connecting pin 35 that can be inserted and removed between the plate members 34, and supports the ball-shaped connector 5A of the top link 5. .

36 is a joint shaft, one end of which is connected to the PTO shaft 4 and the other end of which is connected to the spline shaft 28A of the intermediate bearing body 24 and the joint portion 36A.
The other spline shaft 28B and the PIC shaft 17 are interlockingly connected by the wide-angle joint shaft 37.

8 and 9 show a pair of left and right support brackets 38 mounted on the link bar 8 with bolts 39, and a top mast having a top link connecting pin 39 on the support bracket 38.
40 is provided with a pin 41 so that it can swing back and forth, and
An intermediate bearing body 42 having spline shafts 41A and 41B is attached to the top mast 40.

In the example of FIGS. 8 and 9, the top link connecting pin 39 is made swingable as shown in FIG. 7, which is one of the embodiments of the present invention.

FIG. 10 is a comparative example of the present invention, in which a support base 21 'is fixed to a towed member 15' with bolts 22 ', and an upper portion of the support base 21' is
The intermediate bearing body 24 'having the spline shafts 28A' and 28B 'is fixed, and the joint portion 36A' of the joint shaft 36 'is fixed.
Is connected to the spline shaft 28A ', and the wide-angle joint 37' connects the spline shaft 28B 'and the PIC shaft 17'.

In this comparative example, when the lower link 6'is raised, the contact between the joint shaft 36 'and the link bar 8'can be prevented as much as possible.

To outline the operation of the embodiment of the present invention, when the tractor 1 is moved forward and the PTO shaft 4 is driven, the conveyor 12 of the beach cleaner 10 moves the joint shaft 36, the intermediate bearing body 24, the joint shaft 37, the PIC shaft 17, etc. It is rotatably driven through and picks up empty cans, dust, etc. on the beach, etc., and stores them in the container 13.

When the lower link 6 is lifted from this working state via the lift arm 2 or the like, the intermediate bearing body 24 is swung about the pin 23 and tilted forward, and the PTO shaft 4 and the spline shaft 28A are tilted.
The refraction angle of the joint shaft 36 with respect to is made proper, and contact with the link bar 8 and the like is also prevented.

That is, when the lower link 6 is raised, the intermediate bearing 24 is tilted forward about the pin 23 by the top link 5.

Further, when the tractor 1 is turned as shown in FIG. 3,
The beach cleaner 10 is swung around the hitch pin 16, and the distance between the PTO shaft 4 and the intermediate bearing body 24 is shortened.

At this time, the top link connector 32 swings as shown in FIG. 3 and escapes by the amount by which the above-mentioned distance is shortened, so that the bearing is pushed laterally, the spline part comes off, and abnormal noise is generated. Will be prevented.

(Effects of the Invention) The present invention is as described above. Since the intermediate bearing body is provided in front of the PIC shaft and the intermediate bearing body can be moved back and forth, even if the link type coupling body is lifted, By swinging the bearing body, contact with the joint shaft can be avoided, and furthermore, the refraction angle can be corrected and abnormal noise can be prevented.

Further, since the top link connector is swingably provided on the intermediate bearing body, even when the tractor turns, the joint shaft rotates without difficulty due to the rotation swing of the top link connector, and the spline portion does not come off. , It is possible to smoothly turn while preventing the generation of abnormal noise.

In the embodiment, a beach cleaner is shown as a working machine, but if the working machine has a PIC shaft driven from a PTO shaft through a joint shaft and has a traveling device such as wheels, the present invention is Applicable.

[Brief description of drawings]

The drawings show the present invention and a comparative example, FIG. 1 is an overall side view of an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a plan view of a main part at the time of turning, and FIG. A side view, FIG. 5 is a partial cross-sectional side view of the intermediate bearing body, FIG. 6 is a front view of the same (back), FIG. 7 is a plan view of a top link connector, and FIG. 8 is a second embodiment. 9 is a side view of the same, and FIG. 10 is a side view of a comparative example. 1 ... tractor, 4 ... PTO axis, 5 ... top link,
9 ... Link type connector, 10 ... Working machine, 15 ... Towed member, 17 ... PIC shaft, 24 ... Intermediate bearing body, 32 ... Top link connector, 36, 37 ... Joint shaft.

Claims (1)

[Scope of utility model registration request] 1. A working machine (10) is attached to a link bar (8) at a rear end of a link type connecting body (9) provided at a rear portion of a tractor (1).
The protruding end of the towed member (15) protruding further forward is connected via a hitch pin (16) so as to be swingable in the left-right direction, and the rear PTO shaft (4) of the tractor (1) and the working machine (10) are connected. ) Front PIC shaft (17) and intermediate bearing body (2
4) interlockingly connected via the front and rear joint shafts (36) (37) via the front and rear joint shafts (36) (37), the towed member (position near the hitch pin (16) in front of the front PIC shaft (17) ( 15) in the left-right center,
The intermediate bearing body (24) is provided so as to be swingable in the front-rear direction, and a top link connector (32) swingable in the left-right direction is provided on the upper portion of the intermediate bearing body (24). ) Is connected to the rear portion of the top link (5) in the link type connecting body (9), the connecting device for the tractor and the drive type working machine.