JPH10258623A - Wear sheet installation structure of rear shaft for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the installation workability of a wear sheet for constituting a contact surface to a leaf spring. SOLUTION: The slope with the same direction and same angle running along the axis direction of a rear axle housing 4 for the receiving surface 4a formed on the upper surface of the rear axle housing is given to the lower surface of an installation flange 5a formed on the front/rear both ends of the wear sheet 5 for forming the contact surface to a leaf spring installed on a car body side and the upper surface of a tightening flange 4b projected and formed to the front/rear walls of the rear axle housing 4. By constituting at least one side of the bolt hole formed on the installation flange 5a or the bolt hole formed on the tightening flange 4b by a long hole running along the axis direction of the rear axle housing 4, the proper contact of the wear sheet 5 and the rear axle housing 4 can be obtained by only moving the wear sheet 5 in the axis direction of the rear axle housing 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wear seat mounting structure for a rear axle for an automobile, and more particularly to a mounting structure capable of improving workability of mounting a wear seat.

[0002]

2. Description of the Related Art In an automobile having two rear axles, such as a heavy truck, an end of a leaf spring 3 attached to a vehicle body 1 via a trunnion bracket 2 as shown in FIGS. The lower surface may be slidably brought into contact with the upper surface of the wear sheet 5 attached to the upper surface of the rear axle housing 4 to receive an axial load. 6 is a torque rod, 7 is a trunnion shaft.

[0003] The wear sheet 5 constituting the contact surface with the leaf spring 3 is transferred to the rear axle housing 4.
When the wear sheet 5 is mounted on the rear axle housing 4, the lower surface of the wear sheet 5 is brought into contact with a receiving surface 4 a formed on the upper wall of the rear axle housing 4. The load applied to the wear sheet 5 is applied to the receiving surface 4a or both flanges 4b, 5a by abutting the upper surface of the fastening flange 4b formed on the wall and tightening and fixing the flanges 4b, 5a with bolts and nuts 8. The problem caused by concentrating on was avoided.

In order to ensure that the lower surface of the wear sheet 5 and the lower surface of the mounting flange 5a are in contact with the receiving surface 4a of the rear axle housing 4 and the upper surface of the tightening flange 4b, respectively, to obtain a load distribution effect, What is necessary is just to raise the processing accuracy of each contact surface of the housing 4 and the wear sheet 5.

[0005] However, in this case, the manufacturing cost is increased, and when the receiving surface 8a of the rear axle housing 4 is worn out over a long period of use, the distance between the receiving surface 8 of the rear axle housing 4 and the lower surface of the wear sheet 5 is increased. Gaps are formed in the holes, and the effect of dispersing the load cannot be obtained.

Therefore, conventionally, an adjusting shim (not shown) is sandwiched between the flanges 4b and 5a to secure the contact between both surfaces. However, in order to reliably bring the two contact surfaces into contact with each other using the adjusting shim, the intended purpose cannot be achieved without using the adjusting shim having the optimum thickness. In addition, there is a problem that the manufacturing cost is high because the number of parts increases.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a wear sheet is mounted on a rear axle housing without increasing processing accuracy and without using an adjustment shim. An object of the present invention is to provide a mounting structure for a wear sheet that can be easily and reliably mounted in a hit state, thereby reducing the manufacturing cost of a rear axle for an automobile.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a receiving surface formed on an upper wall of a rear axle housing by forming a lower surface of a wear sheet forming a contact surface with a leaf spring mounted on a vehicle body side. Abut,
The lower surface of the mounting flange formed at the front and rear ends of the wear sheet is extended to the front and rear walls of the rear axle housing, and is brought into contact with the upper surface of the tightening flange formed so that both flanges are tightened and fixed with bolts and nuts. In the wear seat mounting structure of the shaft, the lower surface of the mounting flange and the upper surface of the tightening flange are provided with the same inclination in the same direction and the same angle along the axial direction of the rear axle housing with respect to the receiving surface, respectively. At least one of the bolt hole and the bolt hole formed in the tightening flange is constituted by an elongated hole along the axial direction of the rear axle housing.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wear seat mounting structure for an automobile rear axle according to the present invention. FIG. 1 is a front view of a wear sheet mounting structure showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1 with a wear sheet removed, and FIG. 3 is a view showing a state before a wear sheet mounting position is adjusted. 1 is a sectional view taken along the line AA of FIG. 1, and FIG. 4 is a sectional view taken along the line A-A of FIG.
It is A sectional drawing. The same parts as those in the conventional example shown in FIGS. 5 to 8 are denoted by the same reference numerals, and detailed description thereof will be omitted.

That is, in the present embodiment, the upper surface of the tightening flange 4b formed on the front and rear walls of the rear axle housing 4 and the lower surface of the mounting flange 5a provided on the wear sheet 5, that is, the mating side of the two flanges 4b, 5a. The surfaces opposed to the flanges are each given a gradient in the same direction and the same angle θ along the axial direction of the rear axle housing 4 with respect to the receiving surface 4a. For this reason, when the wear sheet 5 is moved in the axial direction of the rear axle housing 4 by bringing the two flanges 4b and 5a into contact with each other, the size of the gap between the receiving surface 4a and the lower surface of the wear sheet 5 changes.

In this embodiment, the flanges 4b, 5b
a are provided with bolt holes 4c and 5b, respectively. The bolt hole 5b formed in the mounting flange 5a is formed as a round hole, while the bolt hole 4c formed in the fastening flange 4b is formed as an elongated hole along the axial direction of the rear axle housing 4. The mounting position of the wear sheet 5 can be moved in the left-right direction in FIG.

In the wear seat mounting structure having the above-described configuration, the receiving surface 4a of the rear axle housing 4 is worn out due to long-term use, or the receiving surface 4a and the wear sheet 5 are replaced when the wear sheet 5 is replaced.
When a gap is formed as shown in FIG. 3 between the lower surfaces of the seats, the bolts and nuts 8 are loosened to move the wear sheet 5 to the right side in FIG. Then, the mounting height of the wear sheet 5 with respect to the receiving surface 4a decreases due to the gradient of the two flanges 4b and 5a, so that the lower surface of the wear sheet 5 approaches the receiving surface 4a and the gap gradually decreases.

By moving the wear sheet 5 as described above,
As shown in FIG. 4, the movement of the wear sheet 5 is interrupted when the lower surface of the wear sheet 5 comes into close contact with the receiving surface 4a and the correct contact with the gap between them being zero is obtained. When the bolts and nuts 8 are tightened, the lower surface of the wear sheet 5 and the lower surface of the mounting flange 5a are securely brought into contact with the receiving surface 4a of the rear axle housing 4 and the upper surface of the tightening flange 4b, respectively. 5 can be fixed.

That is, the lower surface of the wear sheet 5 is brought into close contact with the receiving surface 4a of the rear axle housing 4 only by moving the wear sheet 5 in the axial direction of the rear axle housing 4 with the two flanges 4b and 5a kept in contact. The correct hit can be obtained easily and quickly. Accordingly, there is no need to use an adjusting shim or the like as in the related art, or it is not necessary to increase the machining accuracy of the receiving surface 4a and the flanges 4b, 5a, etc., so that the manufacturing cost of the rear shaft for automobiles is reduced. be able to.

In the above embodiment, the bolt hole 4c of the fastening flange 4b is formed by a long hole. However, the bolt hole 5b of the mounting flange 5a may be formed by a long hole. Each of 4c and 5b may be constituted by a long hole to shorten the length of the long hole. Further, in the embodiment, the inclination of the angle θ
b, 5a, but the direction and angle of the gradient and the movement width of the wear sheet 5 are not limited to those shown in the embodiment, but the size of the wear sheet 5 and the width of the leaf spring. Gradient direction based on, such as
It is desired to set the angle and the movement width of the wear sheet 5.

[0016]

As is apparent from the above description, according to the present invention, the wear sheet is moved to the rear axle housing while the lower surface of the mounting flange provided on the wear sheet is held in contact with the upper surface of the tightening flange formed on the rear axle housing. The right contact between the wear seat and the rear axle housing can be obtained by a simple method of moving the wear seat and the rear axle housing. Therefore, there is no need to increase the processing accuracy of the receiving surface, the tightening flange, the mounting flange, and the like, and the wear sheet is easily and securely attached to the rear axle housing in a so-called double contact state without using an adjustment shim. Therefore, the manufacturing cost of the rear axle for an automobile can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a wear sheet mounting structure according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 with a wear sheet removed.

FIG. 3 is a sectional view taken along the line AA of FIG. 1, showing a state before adjustment of a mounting position of the wear sheet.

FIG. 4 is a sectional view taken along the line AA of FIG. 1 showing a state after adjustment of a mounting position of the wear sheet.

FIG. 5 is a side view showing an example of a rear axle suspension device of an automobile to which the present invention is applied.

6 is a front view of the rear axle housing shown in FIG.

FIG. 7 is a front view illustrating a conventional structure for mounting a wear sheet.

FIG. 8 is a plan view of FIG. 7 with a wear sheet removed.

[Explanation of symbols]

 Reference Signs List 4 rear axle housing 4a receiving surface 4b tightening flange 4c bolt hole 5 wear sheet 5a mounting flange 5b bolt hole 8 bolt / nut

Claims (1)

[Claims] 1. A lower surface of a wear sheet forming a contact surface with a leaf spring mounted on a vehicle body side is brought into contact with a receiving surface formed on an upper wall of a rear axle housing, and mountings formed on both front and rear ends of the wear sheet. In the wear seat mounting structure for a rear axle for an automobile, the lower surface of the flange is brought into contact with the upper surface of a tightening flange formed on the front and rear walls of the rear axle housing so that both flanges are tightened and fixed with bolts and nuts. The lower surface of the flange and the upper surface of the tightening flange are each provided with a gradient in the same direction and the same angle along the axial direction of the rear axle housing with respect to the receiving surface, and a bolt hole formed in the mounting flange or a bolt formed in the tightening flange. That at least one of the holes is formed by an elongated hole along the axial direction of the rear axle housing. The feature is a wear seat mounting structure for the rear axle for automobiles.