JPH09202109A - Supporting structure of axle housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate vibration or booming noise by adjusting the supporting angle of an axle housing. SOLUTION: An axle housing 22 is connected to a trailing rod 7 by a bracket 23 for fitting the trailing rod provided on an end part of the axle housing. Two bushes 8 (one of the bushes is not indicated in the figure, but fitted by a bolt 24) are provided on a connection part of the trailing rod 7, the bushes 8 are set to a fitting hole 25 of the bracket 23 and an oblong hole which is not indicated and through which the bolt 24 is passed, and the trailing rod 7 is fitted to the bracket 23. The axle housing 22 can change the supporting angle of the axle housing 22 by adjusting the position of the bolt 24 and the oblong hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to both universal joints arranged at both ends of a propeller shaft of an automobile, such as an FR type vehicle or a four-wheel drive vehicle, which rotates a drive wheel through a propeller shaft. The present invention relates to a support structure for an axle housing for preventing vibration and muffled noise caused by a difference in joint angle.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional supporting structure 1 for an axle housing of a four-wheel drive vehicle. As shown in the figure,
The axle housing 2 is provided with trailing rod mounting brackets 3 at both ends. As shown in the side view of the axle housing 2 shown in FIG.
Two bolt mounting holes 5 and 6 are formed vertically. One end of the trailing rod 7 shown in FIG. 8 is attached to the attachment holes 5 and 6.

Explaining this mounting portion, one end of the trailing rod 7 is bifurcated, and bushes 8 and 9 are provided with holes 8a and 9a for inserting bolts at their tips.
Is provided. The axle housing 2 is supported by the trailing rod 7 by aligning the holes 8a and 9a of the bushes 8 and 9 with the mounting holes 5 and 6 of the bracket 3 and fastening them with bolts. As shown in FIG. 6, the other end 10 of the trailing rod 7 is pivotally attached to a metal fitting 11 attached to the body side and is swingably attached.

As shown in FIG. 6, the axle housing 2
Has a differential gear case 12 attached to the front thereof. As shown in FIG. 9A, the differential gear case 12 is attached with a propeller shaft 15 via a universal joint 14, and the propeller shaft 15 is attached via a universal joint 16 to the transfer 1.
7 is attached. Further, as shown in FIG. 6, a coil spring 18 is provided in a compressed state between the cylinder portion 2a of the axle housing 2 and the body of an automobile (not shown).

[0005]

As described above, both ends of the propeller shaft 15 are connected to the universal joint 1.
The transfer gear 17 and the differential gear provided in the differential gear case 12 are connected via 4, 4 and 16. Universal joint 14,1
When the joint angle a between the transfer 17 and the propeller shaft 15 and the joint angle a between the differential gear case 12 and the propeller shaft 15 are the same as shown in FIG. The rotation can be transmitted.

However, as shown in FIG. 9B, when the joint angles a and b have an angle difference, both joint parts cannot transmit rotation at a constant speed due to the structure of the universal joint, and the muffled sound is generated. Or cause vibration. If the angle difference between the joint angles a and b becomes large, the muffled sound or the like becomes large, and if the angle difference is made small, the muffled sound or the like becomes small. This is shown in FIG. The chain line in the figure represents the vehicle body vibration level with respect to the engine speed when the universal joints 14 and 16 have the same joint angle, and the solid line represents the vehicle body vibration level when the joint angles do not match. Therefore, in order to eliminate the muffled sound and the vibration, their joint angles may be matched.

With respect to the support angle of the axle housing 2, if the body on the coil spring 18 becomes heavier, the other end 10 on the front side of the trailing rod 7 is lowered, so that the axle housing 2 is lowered frontward. Further, if the body on the coil spring 18 becomes lighter, the axle housing 2 will move forward. In the past, both the axle housing 2 and the transfer 17 were fixedly supported and the angle could not be adjusted. However, Japanese Utility Model Publication No. 60-13868 discloses a mechanism for changing the angle of the axle housing.

This mechanism requires the bush to be replaced each time the angle of the axle housing is changed. Further, when the same support structure of the axle housing is used for different vehicle types, the weight of the body is different, so that a bush dedicated to that vehicle type must be manufactured. In addition, there is a problem that it is difficult to finely adjust the angle.

The present invention has been made in view of the above-mentioned problems, and provides a support structure for an axle housing that does not require replacement of parts to change the support angle of the axle housing and that allows easy angle adjustment. The purpose is to do.

[0010]

SUMMARY OF THE INVENTION The above object is to fix a trailing rod mounting bracket to a trailing rod mounting bracket of an axle housing in which a plurality of bolt mounting holes are formed at a plurality of points by bolts. In the axle housing support structure in which the other end of the trailing rod is swingably attached to the vehicle body side, one of the plurality of bolt mounting holes formed in the trailing rod mounting bracket is formed as a long hole. This is achieved by an axle housing supporting structure in which the axle housing can be fixed by rotating the axle housing around the other one bolt mounting hole along the elongated hole, and the supporting angle of the axle housing can be adjusted. It

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A support structure for an axle housing according to an embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a support structure for an axle housing according to the present invention. The axle housing support structure 21 is different from the conventional example in the axle housing 22.
It is only the trailing rod mounting bracket 23 attached to the end of the and the eccentric washer bolt 24 for attaching the trailing rod 7. Hereinafter, these structures will be described in detail.

FIG. 2 is a side view of the trailing rod mounting bracket 23 as seen from the wheel side. As shown in the drawing, the bracket 23 is attached to the tubular portion 22 a of the axle housing 22. In one bracket 23, a pair of flat plates 23a having the same shape are arranged with an interval enough to sandwich the bush 8 of the trailing rod 7.

The flat plate 23a is provided with a perfect circular mounting hole 5 for mounting a bolt on the upper portion thereof. Flat plate 23a
An elongated hole 26 is formed in the lower part of the. The shape of the long hole 26 is formed in an arc hole shape centering on the mounting hole 5. Further, projecting stopper members 28a and 28b are provided on the side portions in the longitudinal direction of the slot 26. The axle is inserted into the hole 22b inside the tubular portion 22a.

FIG. 3 shows a bolt 24 with an eccentric washer for attaching the bushes 8 and 9 of the trailing rod 7 to the bracket 23. Bolt with Eccentric Washer 24
Is an eccentric washer 30, 31, a bolt 32, a nut 33.
It is composed of The disc-shaped eccentric washer 30 has a hole through which the bolt 32 penetrates outside the center. The other disk-shaped eccentric washer 31 also has a crescent-shaped hole 31a at a position corresponding to the through hole of the bolt 32. In the bolt 32, the threaded portion 32a at the tip has the same sectional shape as the hole 31a.

4A to 4C are side views showing a state in which the eccentric washer bolt 24 is fastening the bracket 23. The trailing rod 7 has a hole 9a (see FIG. 8) for inserting a bolt of the bush 9 and a long hole 26 shown in FIG.
Then, a bolt 32 having an eccentric washer 30 is passed through the holes 9a and 26. At this time, the eccentric washer 30 is fitted between the stopper members 28a and 28b.
The distance between the stopper members 28a and 28b is substantially the same as the diameter of the eccentric washers 30 and 31, and is provided in parallel, so that the washers 30 and 31 are restricted between them. Then, the washer 3 is attached to the screw portion 32a of the bolt 32.
1 is passed through and the end of the trailing rod 7 is fixed to the bracket 23 with the nut 33.

The supporting structure for the axle housing according to the embodiment of the present invention has been described above. Next, the operation will be described.

FIG. 5A shows the initial support state in which the angle of the axle housing 22 is not adjusted. In this state, the position of the bolt 32 of the eccentric washer-equipped bolt 24 is substantially in the middle of the elongated hole 26, as shown in FIG. 4A. For example, from this state, when it is desired to change the support angle of the axle housing 22 to lower the front of the vehicle body, the bolt 32 of the eccentric washer-equipped bolt 24 is loosened.

Then, the fixing position of the bolt 32 is changed so that the lower portion of the elongated hole 26 is fixed by the bolt 32 as shown in FIG. 4B. In this way, the axle housing 2
Since the support angle of 2 can be changed, the axle housing 22 can be lowered to the front as shown in FIG. 5B. When adjusting the support angle of the axle housing 22, the eccentric washer-equipped bolt 24 can finely adjust the amount of rotation to adjust the position of the bolt 32.

When it is desired to change the support angle of the axle housing 22 to move forward, the fixing position of the bolt 32 is changed so that the upper portion of the elongated hole 26 is fixed by the bolt 32 as shown in FIG. 4C. To do. In this way, the supporting angle of the axle housing 22 can be changed to raise the axle housing 22 forward as shown in FIG. 5C.

In this way, the axle housing 22
If the support angle of the universal joint 14 is changed to the joint angle of the universal joint 16 disposed between the transfer 17 and the propeller shaft 15, the universal joint 14 disposed between the propeller shaft 15 and the axle housing 22 is changed. The joint angles (see joint angle a in FIG. 9) can be matched. Therefore, it is possible to prevent the vibration and the muffled sound caused by the difference in the joint angle between the universal joints 14 and 16.

The embodiment of the present invention has been described above. However, the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, although the number of the long holes 26 is one in the above-mentioned embodiments, the bracket 23 can be used for this long hole.
It is also possible to provide two or more of them to further increase the fixing force.

[0024]

As described above, according to the present invention, after the axle housing is assembled to the vehicle body (after the vehicle body is completed).
Also, without changing parts, the support angle of the axle housing can be minutely changed only by adjusting the positional relationship between the bolt and the long hole. Therefore, it is possible to eliminate the angular difference of the universal joints arranged at both ends of the propeller shaft, and it is possible to prevent vibration and muffled noise caused by the angular difference.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire support structure for an axle housing according to an embodiment of the present invention.

FIG. 2 is a side view of a trailing rod mounting bracket used in the axle housing support structure.

FIG. 3 is an exploded perspective view of a bolt with an eccentric washer used in the support structure for the axle housing.

FIG. 4A is a side view showing a state where the bracket of the axle housing is initially supported. FIG. 6B is a side view showing the support state of the bracket when the axle housing is lowered frontward. FIG. 6C is a side view showing a support state of the bracket when the axle housing is raised upward.

FIG. 5A is a side view showing a state in which the axle housing is initially supported. B is a side view when the axle housing is lowered frontward. C is a side view when the axle housing is raised to the front.

FIG. 6 is a perspective view showing an entire supporting structure of an axle housing according to a conventional example.

FIG. 7 is a side view of an axle housing part used in the support structure for the axle housing.

FIG. 8 is a side view of a trailing rod used in a support structure for an axle housing.

FIG. 9A is a side view showing an ideal joint angle of universal joints arranged at both ends of the propeller shaft. B is a side view showing a state where the joint angles of the universal joint do not match.

FIG. 10 is a diagram showing vehicle body vibration levels when the joint angles of the universal joint are the same and when they are not.

[Explanation of symbols]

 7 Trailing Rod 21 Axle Housing Support Structure 22 Axle Housing 23 Trailing Rod Mounting Bracket 24 Eccentric Washer Bolt 25 Mounting Hole 26 Long Hole 28a, 28b Stopper Member

Claims (2)

[Claims] 1. A trailing rod mounting bracket of an axle housing having a plurality of bolt mounting holes formed therein, wherein one end of the trailing rod is fixed at a plurality of points with bolts, and the other end of the trailing rod is mounted on the vehicle body. In a supporting structure of an axle housing swingably mounted on one side, one of a plurality of bolt mounting holes formed in the bracket for mounting the trailing rod is formed into a long hole, and one of the other bolt mounting holes is mounted. A support structure for an axle housing in which the axle housing can be fixed by rotating the axle housing around the hole, and the support angle of the axle housing can be adjusted. 2. A projecting stopper member is provided in parallel on both sides of the elongated hole in the longitudinal direction, the through hole of the bolt is eccentric to the bolt inserted into the elongated hole, and the diameter is between the stopper members. The support structure for an axle housing according to claim 1, wherein a circular eccentric washer having a length substantially the same as that of the above is provided, and the eccentric washer is restricted between stopper members.