JPH0520098Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a device for eliminating looseness between the top link support and the mounting base of a three-point linkage mechanism that connects a tractor and a working machine, for example. .

(Prior Art) As a link support rattling prevention device of this type, for example, one described in Japanese Utility Model Application Publication No. 124403/1983 is known.

In the conventional type, as shown in FIG. 4, a mounting base 41 is provided protruding from the rear surface of a tractor body 40, and a top link support 43 is detachably attached to the mounting base 41 via a detachable mounting pin 42. connected to
Top link 44 to the top link support 43
are connected.

Since the top link support 43 and the mounting base 41 are connected via the mounting pin 42, play occurs in the joint. Therefore, a pair of wedge bodies 45 and 46 are provided between the vehicle body 40 side and the top link support 43 so as to sandwich the top link support 43.
is inserted and presses the top link support 43 in the radial direction of the mounting pin 42 to prevent play between the two.

That is, the pair of wedge bodies 45 and 46 are pulled toward each other by a tension spring 47, one end of an operating lever 48 is fixed to one wedge body 46, and the other end of the operating lever 48 is fixed to the other wedge body 46. It penetrates the body 45 and protrudes. The tension spring 47 was strong because it brought the pair of wedge bodies 45 and 46 closer together to press the top link support 43.

(Problem to be solved by the invention) The conventional rattling prevention device described above is
8 in the axial direction against the spring 47,
Thereafter, the operating lever 48 was rotated to change the direction of the wedge body 46, and the wedge body 46 was pulled out from between the vehicle body 40 side and the top link support 43. Therefore, the operation lever 48 can be moved with enough force to overcome the strong spring 47 during the attachment/detachment operation.
The attachment/detachment operation was extremely difficult.

Furthermore, since the wedge body 46 must be rotated in order to remove the wedge body 46, a large gap is required between the outer surface of the vehicle body 40 and the top link support 43, or the wedge body 46 must be wide. There was a problem that the support of the link support 43 was unstable.

Therefore, an object of the present invention is to provide a link support rattling prevention device that can be attached and detached with extremely light operating force.

(Means for solving the problems) In order to achieve the above object, the present invention takes the following measures. That is, the feature of the present invention is that the vehicle body 1
A mounting base 10 is provided protruding from the side, and a pair of mounting bases of a link support 15 are inserted between a pair of support parts provided on the mounting base 10, and a pair of parallel mounting pins 19 are inserted through both. , 20, the link support 15 is removably connected to the mounting base 10, and the link support 15 is connected to the mounting pins 19, 20.
A pair of wedge bodies 2 are pressed in the radial direction to eliminate looseness between the link support 15 and the mounting base 10.
2 and 23 are inserted from both outer sides of the mounting pins 19 and 20 to face each other between the mounting pin insertion portions 17 and 18 installed between the mounting bases of the link support 15 and the vehicle body 1 side, and In the case where the wedge bodies 22 and 23 are movable toward and away from each other, the wedge bodies 22 and 23 are connected by a fastening screw rod 26 so as to approach each other.
In addition, the fastening screw rod 26 has a mounting pin insertion portion 17,
18, located on the opposite side of the vehicle body 1.

(Function) According to the present invention, the pair of wedge bodies can be moved toward and away from each other by the fastening screw, so by tightening the fastening screw, the wedge body presses the link support and prevents looseness between the wedge body and the mounting base. By loosening the fastening screw, the two are separated and can be removed.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIG. 3, reference numeral 1 denotes a tractor body, and 2 denotes a hydraulic system for lifting and lowering a working machine mounted on the rear part of the tractor body 1, which has a pair of left and right lift arms 3. Reference numeral 4 denotes a rotary work machine, which includes a rotary machine frame 5, a rotary tiller 6, etc., and is pulled behind the tractor body 1 via a three-point linkage mechanism 7. The three-point link mechanism 7 includes a top link 8 and a pair of left and right lower links 9.

As shown in FIGS. 1 and 2, 10 is a top link mounting base, and bolts 11 are attached to the rear end surface of the vehicle body 1.
a mounting base 12 removably attached to the
It consists of a pair of left and right side plates 13 that protrude rearward from both sides of the mounting base 12. A plurality (three in the illustrated example) of pin holes 14 passing through the side plates 13 in the horizontal direction are arranged in parallel in the vertical direction in the support portions at the rear of these side plates 13.

Reference numeral 15 denotes a top link support, which is constructed between a pair of left and right support plates 16 and a mounting base on the front end side of the support plate 16, and is provided with a pair of horizontal pin insertion tubes 17 and 18 (mounting pin insertion tubes 17 and 18 arranged in parallel in the vertical direction). It consists of (part). The front end of the support 15 is connected to both side plates 13
By inserting the mounting pins 19 and 20 into the corresponding pin holes 14 and pin insertion tubes 17 and 18 in a removable manner, the support 15 is removably provided in the mounting base 10 as a rear protrusion. ing. A top link 8 is removably supported at the rear of the support 15 via a support pin 21.

22 and 23 are a pair of upper and lower wedges.
The connectors 2 and 23 are inserted between the mounting base 12 and the insertion tubes 17 and 18 in a sandwiched manner from above and below.
The lower wedge 23 is provided with a screw hole 24, and the upper wedge 22 is provided with a through hole 25 facing the screw hole 24.
The screw hole 24 and the through hole 25 are formed in the insertion tube 1.
It is located behind 7 and 18.

26 is a fastening screw rod, and a threaded portion 27 is formed at the lower end of the fastening screw rod 26. The upper end of this fastening screw rod 26 is bent into an L shape to form an operating portion 28 . A flange 29 is formed in the middle of this fastening screw rod 26.

The fastening screw rod 26 is inserted through the through hole 25 of the upper wedge body 22, and the lower threaded portion 27 of the fastening screw rod 26 is screwed into the screw hole 24 of the lower wedge body 23. The flange 29 of the fastening screw rod 26 is in contact with the upper surface of the upper wedge body 22. By rotating the operating part 28 of the fastening screw rod 26, the threaded part 27 and the threaded hole 24 are screwed, and the upper and lower wedge bodies 2
2, 23 approaches. The wedge bodies 22 and 23 are the base 12
It enters between the insertion tubes 17 and 18 and presses the top link support 15 to prevent rattling.

The lower end of the fastening screw rod 26 protrudes from the screw hole 24, and a lock nut 30 is screwed into the protrusion.

To remove the rattling prevention device, loosen the lock nut 30, then rotate the fastening screw rod 26 to release the threaded connection between the screw hole 24 and the threaded portion 27, and then the upper and lower wedges 22 and 23 are disconnected.

Note that the present invention is not limited to the above embodiments.

(Effects of the invention) The present invention uses screws to connect and separate the upper and lower wedge bodies without using a spring like in the past, so attachment and detachment operations can be performed with a small amount of force. It is easy to operate, and since it is tightened with a screw, it strongly prevents rattling.

Further, according to the present invention, since the fastening screw rod is arranged on the opposite side of the mounting pin insertion part from the vehicle body, there is no need to loosen the screw rod and rotate the wedge body around its axis. Link supports can be removed. That is, since there is no need to consider the margin for rotation of the wedge body, the wedge body can be formed to have a wide width and strong support can be achieved.

Furthermore, the wedge body is inserted between the mounting pin insertion part and the vehicle body side, and the fastening screw rod is inserted into the mounting pin insertion part.
Because they are located on the opposite side of the car body, even if the link support is removed from the mounting base, the wedge body and fastening screw rod will not separate from the link support, and this will prevent the wedge body and fastening screw rod from being lost. If there is no risk of the wedge body separating from the link support, when installing the link support, the wedge body etc. must be held with one hand and the link support must be held with the other hand. However, with the device of this invention, the link support can be held with both hands,
When installing the link support, it is easy to install, and if the fastening screw rod is between the mounting pin insertion part and the vehicle body side, there will be no restrictions in forming the contact surface with the mounting pin insertion part of the wedge. However, in the present invention, there is a large degree of freedom in forming the abutting surface of the wedge body with the mounting pin insertion portion.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view showing the overall configuration, and FIG. 4 is a sectional view showing a conventional example. 1... Vehicle body, 10... Mounting base, 15... Link support, 19, 20... Mounting pin, 22, 23
... wedge body, 26 ... fastening screw rod.

Claims (1)

[Scope of claim for utility model registration] A mounting base 10 is provided protruding from the side of the vehicle body 1, and the mounting base 1
Link support 1 is installed between the pair of support parts provided at 0.
5 are inserted, and the link support 15 is removably connected to the mounting base 10 via a pair of parallel mounting pins 19 and 20 inserted through both, and the link support 15 is attached to the mounting pin 10. 1
Link support 15 by pressing in the radial direction of 9 and 20
In order to eliminate looseness between the mounting base 10 and the mounting base 10, a pair of wedge bodies 22, 23 are inserted from both outsides of the mounting pins 19, 20 into the mounting pin insertion portions 17, 18 which are installed between the mounting bases of the link support 15. , which is inserted between the side of the vehicle body 1 in a facing manner and can be moved toward and away from each other, and the wedge bodies 22 and 23 are connected by a fastening screw rod 26 so as to approach each other, and the fastening screw rod 26
1 is a link support rattling prevention device, characterized in that it is arranged on the opposite side of the vehicle body 1 of the mounting pin insertion portions 17 and 18.