JPH0642002A - Tractor - Google Patents

Abstract

(57) [Summary] [Purpose] When the backhoe is attached to the tractor, the lower link removed from the tractor body can be accommodated. [Structure] Left and right main frames 6 extending in the front-rear direction are fixed to the lower left and right side surfaces of the tractor vehicle body 4, and
In a tractor having a backhoe mounting part 9 and a lower link mounting part 17 for a three-point link at the rear part, in the left and right main frames 6, an accommodating part 23 for accommodating the lower link 18 is formed and is accommodated. The lower link 18 is provided with a retaining means 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor, and more particularly to a tractor on which a backhoe and a working machine such as a rotary having a three-point link can be exchangeably mounted on a rear portion of a vehicle body.

[0002]

2. Description of the Related Art There is a wheel type tractor in which a front loader is attached to the front part and a backhoe is attached to the rear part.
In this case, in order to make the vehicle body rigid, main frames extending in the front-rear direction are provided on the lower left and right side surfaces of the vehicle body to prevent the vehicle body from bending. On the other hand, the tractor is provided with a hydraulic device having a lift arm at its rear part, and when a backhoe is not mounted, a working machine such as a rotary can be raised and lowered by a three-point link.

[0003]

When a backhoe is attached to a tractor having a three-point link, the left and right lower links of the three-point link and the lift rods, check chains, and the like attached to the lower tract interfere with the tractor. It is necessary to remove it from the car body and store it. However, conventionally, the lower link and the like cannot be stored, and when the backhoe is mounted, the lower link is stored separately in the barn or the like separately from the tractor.

In this case, it is troublesome to remove the backhoe and make a tractor with a three-point link specification. Therefore, an object of the present invention is to improve the structure of the main frame so that the lower link detached from the tractor vehicle body can be accommodated when the backhoe is mounted.

[0005]

SUMMARY OF THE INVENTION The present invention is a tractor vehicle body.
The right and left main frames 6 extending in the front-rear direction are fixed to the lower left and right side surfaces of the vehicle 4, and the backhoe mounting portion 9 and the lower link mounting portion 17 for the three-point link are provided at the rear portion of the vehicle body 4 as described above. In order to achieve, the following technical measures are taken.

That is, according to the present invention, a housing portion for housing the lower link 18 in the left and right main frames 6 so that the lower link 18 can be inserted and removed freely.
23 is formed, and a retaining means 26 for the accommodated lower link 18 is provided.

[0007]

[Operation] When the mounting frame 8 of the backhoe 3 is mounted on the backhoe mounting part 9, the lower link 18 in the three-point link is detached from the mounting part 17 and the main frame 6 is removed.
It is inserted into the accommodating portion 23 formed in the above and is engaged and accommodated by the retaining means 26.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 3, a two-axis, four-wheel type tractor 1 is equipped with a front loader 2 at the front and a backhoe 3 at the rear. There is. As shown in FIG. 2, a main frame 6 extending in the front-rear direction is fixed to the lower left and right side surfaces of the tractor vehicle body 4 by using a rear axle box 5 and the like.

This main frame 6 is a pair of left and right,
A rear side is provided with a reinforcing frame 7 having a triangular shape in a side view, and a mounting portion 9 of a backhoe mounting frame 8 is formed above and below the reinforcing frame 7. The left and right upper mounting portions 9 are attached by the pins 10, and the left and right lower mounting portions 9 are formed in a hook shape so as to fit and receive the pins 11 provided on the mounting frame 8 from above.

A hydraulic system 13 having a lift arm 12 is mounted on the rear upper surface of the tractor body 4, and a driver's seat J is arranged on the hydraulic system 13 between the left and right rear wheel fenders 14 and J is surrounded by a safety frame 15 which is erected using a reinforcing frame 7. A top link mount 16 is fixed to the upper rear elevation of the tractor body 4, and lower left and right lower mounts 17 are attached to the lower left and right sides using the rear axle box 5.
The one end ball socket 18A of the lower link 18 is detachably connected to the mounting portion 17 and constitutes a three-point link together with the top link 19.

The lift arm 12 and the middle of the left and right lower links 18 are connected by a lift rod 20, and a check chain 21 and the like form a three-point link. When mounting the backhoe 3, the lower link 18 is removed together with the check chain 21, the top link 19 is faced upward and engaged with the metal fitting 22 of the vehicle body, and the lift rod 20 is also removed to mount the backhoe 3. It does not hinder the

As shown in FIGS. 1 and 2, the main frame 6 is formed in a box shape, and a lower link 18 with a check chain and an accommodating portion 23 for accommodating and inserting a lift rod 20 are formed. With the lower link 18 etc. accommodated, the pin insertion hole 24 to the pin 25
The ball socket 18A and the connecting hole 20A are equipped with a retaining means 26 for retaining and retaining these by inserting them.

The retaining means 26 is provided in the vicinity of the entrance / exit 4A of the vehicle body 4, and is provided at a position where the pin 25 can be inserted / removed without any trouble from the left / right direction. After accommodating the lower link 18 and the like, a mud or the like can be prevented from entering the accommodating portion 23 by providing an openable / closable cover at the entrance 23A of the accommodating portion 23.

The backhoe 3 is provided with a control box 27 on a mounting frame 8. A boom 29 is mounted on the mounting frame 8 via a swing frame 28 so as to be able to move up and down.
A bucket 31 is provided via an arm 30, and the expanding and contracting cylinders 32, 33, 34 and the like enable digging work and the like.
The groove depth can be measured by setting the boom 29 in the horizontal direction and the arm 30 in the vertical direction and grounding the bucket 31 on the groove bottom.At this time, the cylinders 32, 33,
By forming the scales 32A, 33A, 34A on the rod of 34,
The groove depth can be easily measured.

The backhoe 3 is provided with a boom drop prevention pin 35 which can be inserted and removed freely when the tractor 1 travels on the road without using the backhoe 3, and as shown in the enlarged A of FIG. A hole for storing the pin 35 in the skirt 27A
36 are formed. Therefore, when the backhoe 3 is used, the pin 35 is stored in the hole 36 to prevent the soil from adhering to the pin 35, and when the tractor 1 travels on the road, the lock pin hole 37 is provided. The pin 35 is inserted to prevent the boom 29 or the like from falling naturally.

In the above embodiment, when the backhoe 3 is mounted, the left and right lower links 18 of the three-point link and the lift rod 20 are removed, and the accommodating portion 23 is indicated by the arrow B in FIG.
Then, the backhoe 3 is mounted on the backhoe mounting portion 9 via the mounting frame 8 while the storage state is maintained by the retaining means 26. On the other hand, when the backhoe 3 is not used, the mounting frame 8 is removed, the backhoe 3 is removed, the left and right lower links 18 and the like are pulled out from the accommodating portion 23, and the lower link mounting portion 17 and the like are used to connect the rotary etc. by the three-point link. The working machine of is installed.

The front loader 2 does not have to have this.

[0018]

The present invention is as described above, and in the tractor 1 in which a backhoe 3 and a working machine such as a rotary by a three-point link can be exchangeably mounted on the rear part of the tractor body 4, the lower left and right side surfaces of the tractor body 4 are attached. The left and right main frames 6 extending in the front-rear direction and fixed to the left and right main frames 6 are formed with an accommodating portion 23 for accommodating the lower link 18 so that the lower link 18 can be inserted and removed, and a retaining means 26 for the accommodated lower link 18 is provided.
When the backhoe 3 is attached, the lower link 18, which is a three-point link, can be stored and stored in the main body 4, which is convenient.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a rear view of the tractor.

FIG. 3 is a side view of the tractor.

[Explanation of symbols]

 1 tractor 3 backhoe 4 tractor vehicle body 6 main frame 18 lower link 23 housing 26 retaining means

Claims (1)

[Claims] 1. A left and right main frame (6) extending in the front-rear direction is fixed to lower left and right side surfaces of a tractor vehicle body (4), and a backhoe mounting portion (9) and a three-point link are attached to a rear portion of the vehicle body (4). In a tractor having a lower link mounting portion (17) for use in the left and right main frames (6), a housing portion (23) for housing the lower link (18) in a removable manner is formed, and the housed lower link ( A tractor characterized by being provided with a retaining means (26) of (18).