JPH06127440A - Reinforcement frame device for tractor body - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent cracking of the tractor body. [Structure] Tractor body having a circular rear axle case 14
A pair of left and right reinforcement frames 6 extending in the vehicle front-rear direction are attached to the lower portions of both sides of 2 via front and rear mounting parts 7 and 8, and the reinforcement frames 6
At the rear part, upper and lower connecting parts 18, 19 such as a backhoe are provided. A side plate 16 having a triangular shape in a side view and having upper and lower connecting portions 18 and 19 is vertically fixed to the rear portion of the reinforcing frame 6, and an insertion hole 20 for inserting the rear axle case 14 is inserted in the vertical surface of the side plate 16. The rear mounting portion 8 formed and provided in the vicinity of the insertion hole 20 includes a holding portion 8A that holds the rear axle case 14 and allows relative rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcement frame device for a tractor vehicle body.

[0002]

2. Description of the Related Art When a front loader is attached to the front part of a tractor and a backhoe is attached to the rear part of the tractor, when the tractor body is composed of a cast case, that is, a clutch housing and a transmission case, the body of the tractor may crack due to impact or the like. In order to cause oil leakage or the like, there is a tractor body in which a pair of left and right reinforcing frames extending in the vehicle front-rear direction are attached to the lower portions on both sides of the tractor body through front and rear mounting portions.

[0003]

However, the conventional front mounting portion is fixed to the lower abdomen of the vehicle body with bolts, and the rear mounting portion also has a pair of sandwiching plates applied to the upper and lower surfaces of the rear axle case. Since it was configured to be connected and fixed with bolts, the bending force acts from the rear part of the vehicle body on the whole due to the impact at the time of backhoe work, and there is a risk that the body frame of the vehicle body will be cracked unless the entire reinforcement frame is made robust.

Therefore, an object of the present invention is to solve the above-mentioned problems by providing a portion for allowing relative rotation in a wrapping portion of a rear axle case which is a rear mounting portion.

[0005]

According to the present invention, a pair of left and right reinforcement frames 6 extending in the vehicle front-rear direction are provided at the front and rear mounting portions 7, at the lower portions on both sides of a tractor vehicle body 2 having a circular rear axle case 14.
In order to achieve the above-mentioned object, the following technical measures are taken in the case where the rear frame of the augmentation frame 6 is provided with the upper and lower connecting parts 18 and 19 such as a backhoe. .

That is, according to the present invention, in the rear part of the reinforcement frame 6,
A side plate 16 having a triangular shape in a side view having upper and lower connecting portions 18 and 19 is vertically fixed and formed, and an insertion hole 20 through which the rear axle case 14 is inserted is formed on the vertical surface of the side plate 16, and the insertion hole 20 is formed. The rear mounting portion 8 provided in the vicinity of is equipped with a holding portion 8A that holds the rear axle case 14 and allows relative rotation.

[0007]

[Operation] When a backhoe 26 is attached to the tractor vehicle body 2 via the upper and lower connecting portions 18 and 19 and a work is performed, a strong vertical shock is applied from the upper and lower connecting portions 18 and 19 to the holding portion 8A. Thus, the portion enclosing the rear axle case 14 allows relative rotation, bends the reinforcing frame 6 to release force, and suppresses propagation to the tractor body 2.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2 showing an overall side view, a vehicle body 2 of a wheel-type tractor 1 has a cast clutch housing on the rear surface of an engine 3. 4 and mission case 5 are connected in series. A reinforcement frame 6 extending in the front-rear direction of the vehicle body is attached to the lower portions of both sides of the tractor vehicle body 2 via front and rear mounting portions 7 and 8.

The front mounting portion 7 is a bolt fastening portion 12 between a mast mounting portion 10 of the front loader 9 and a bracket 11 extending rearward from the mast mounting portion 12, and the mast mounting portion 10 laterally traverses the lower abdomen of the vehicle body. At the same time, in the vicinity of the bolt fastening portion 12, a tie plate 13 that laterally traverses the lower abdomen of the vehicle body is superposed on the lower bottom surface for bolting. At the rear part of the tractor body 2, as shown in FIG. 3, a rear axle case 14 having a final reduction gear, a brake and the like built therein is projected outward in the left and right directions, and a rear axle 15 is inserted in the case 14. This part is circular.

As shown in FIG. 3, the reinforcing frame 6 has a vertically long box shape, and a side plate 16 having a triangular shape in a side view is erected and fixed on the inner side surface of the pair of left and right side plates 16 as shown in FIG. The upper part and the lower part are connected to each other by a connecting bar 17, and upper and lower connecting parts 18 and 19 are provided at the rear part. An insertion hole 20 through which the rear axle case 14 is inserted is formed on the vertical surfaces of the pair of left and right side plates 16, and a rear mounting portion 8 is provided near the insertion hole 20.

The rear mounting portion 8 comprises a lower holding plate 21 which makes line contact with the lower surface of the rear axle case 14 and a vertical holding plate 22 which makes line contact with the rear surface of the rear axle case 14 extending outward from the vertical surface of the side plate 16. An upper holding plate 23 having an arcuate portion for holding the rear axle case 14 in line contact with the holding plate 21 and the vertical holding plate 22 is fixed with bolts 24 and 25 as shown in FIG. It is provided with a sandwiching portion 8A that allows relative rotation of the.

The mounting frame 27 of the backhoe 26 is detachably connected to the upper and lower connecting portions 18 and 19, and the upper connecting portion 18 is a side plate.
A mounting plate 29 is fixed to the inner surface of 16 via a receiver 28 having a flange 28A to form an insertion portion 32 below the support 31 of the sunshade frame 30, and a cylindrical boss 33 is fixed to the mounting plate 29 and the side plate 16. It becomes. Therefore, the mounting frame 27 can be attached and detached by holding the connecting pin 34 on both sides of the pair of cylindrical bosses 33 and inserting it.

On the other hand, the lower connecting portion 19 has a hook shape, and the pin 35 fixed to the mounting frame 27 is fitted from above.
In addition, in the insertion portion 32, the flange 31A and the flange 28A of the support column 31 can be overlapped and bolted. In addition, in FIGS. 4 and 5, 36 and 37 denote bolt insertion holes.

Further, in FIG. 2, the backhoe shows the revolving frame 38, the boom 39, the boom cylinder 40, and the like. Further, the front loader shows a pair of left and right masts 41, booms 42, and braces 43. Also, the tractor body
A hydraulic device 45 having a lift arm 44 is provided at the rear part of the 2 and a seat 46 is provided on the hydraulic device 45.

It should be noted that the holding portion 8A may be one in which the vertical holding plate 22 shown in the drawing is in line contact with the front surface of the rear axle case 14 and is L-shaped in side view together with the lower holding plate 21. The U-bolt may be screwed into the lower holding plate 21.

[0016]

The present invention is as described above, and the impact during the work of the backhoe or the like can be escaped by the relative rotation of the rear mounting portion, and it is prevented from directly propagating to the tractor body,
It is possible to prevent cracks in the vehicle body and oil leaks.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is an overall side view of an embodiment of the present invention.

FIG. 3 is an overall rear view of the embodiment of the present invention.

FIG. 4 is a plan view of a rear mounting portion.

FIG. 5 is a rear view of the rear mounting portion.

[Explanation of symbols]

 2 tractor body 6 reinforcement frame 7 front mounting part 8 rear mounting part 14 rear axle case 16 side plate 18 upper connecting part 19 lower connecting part 20 insertion hole

Claims (1)

[Claims] 1. A pair of left and right reinforcement frames (6) extending in the vehicle front-rear direction are provided at the lower portions on both sides of a tractor vehicle body (2) having a circular rear axle case (14). ), And the upper and lower connecting parts (18) and (19) of the backhoe etc. are provided at the rear part of the reinforcing frame (6), the upper and lower connecting parts are connected to the rear part of the reinforcing frame (6). A side plate (16) having a triangular shape in a side view having portions (18) and (19) is erected and fixed, and an insertion hole (20) through which the rear axle case (14) is inserted is provided on the vertical surface of the side plate (16). The rear mounting portion (8) formed and provided near the insertion hole (20) is
An augmentation frame device for a tractor vehicle body, comprising a sandwiching portion (8A) that holds the rear axle case (14) and allows relative rotation.