JPH05238279A - Suspension device for differential gear - Google Patents

Abstract

PURPOSE:To reduce the dimension of a suspension device by suppressing the rolling of a mount arm and simplify structure by lightening the force applied on a mount. CONSTITUTION:The edge part of a stabilizer 9 having a nearly U shape 15 connected at a mount arm 7 on both the sides, nipping the fixed part P between the mount arm 7 and a carrier case 6, and the stabilizer 9 is supported on a car body side. Accordingly, the rolling generated on the mount arm 7, having the fixed part P as center, is pressed to the edge part of the stabilizer 9 and can be suppressed. Since the rolling of the mount arm 7 can be suppressed independently of the length of the mount arm 7, the reduction of dimension can be achieved by shortening the length of the mount arm 7, and the function of suppressing the rolling of the mount arm 7 and the function of supporting the weight of a differential gear can be charged by each part, and the structure of the mount can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention suppresses rolling of a mount arm that occurs during acceleration / deceleration of an automobile, thereby reducing the size of a differential gear suspension device and simplifying the structure of a mount that supports the mount arm. The present invention relates to a suspension device for a differential gear.

[0002]

2. Description of the Related Art As shown in FIG. 2, the driving force from an engine 1 and a mission 2 is output to a propeller shaft 3, and the driving force output to this propeller shaft 3 is a differential gear 4 (hereinafter abbreviated as "diff"). Is output to the drive shaft 5 via. The diff 4 is incorporated in a diff carrier case, and the diff 4 is supported by mounting and supporting the diff carrier case via a mount arm. In this way, the driving force output to the propeller shaft 3 is output to the drive shaft 5 via the differential 4, so that the rotation torque of the propeller shaft 3 influences the carrier case to support the carrier case. A bending moment and a torsion moment are applied to the mount arm, and a so-called rolling phenomenon occurs in the mount arm due to the bending moment and the torsion moment. Therefore, the mount supporting the mount arm is required to have a function of supporting the weight of the differential while suppressing the rolling of the mount arm.

A conventional differential gear suspension system will be described with reference to FIG. A mount arm 7 is fixed to a carrier case 6 in which a diff is incorporated, and the carrier case 6 is suspended on a body body side (not shown) via mounts 8 provided at both ends of the mount arm 7. .. Then, the force (rotation) of the mount arm 7 generated when the rotational driving force of the propeller shaft 3 is transmitted to the drive shaft 5 through the differential incorporated in the carrier case 6 reduces the force received by the mount 8. Therefore, the distance L1 between the mounts 8 provided at both ends of the mount arm 7 is increased to simplify the structure of the mount 8.

Further, Japanese Utility Model Laid-Open No. 62-68820 discloses a suspension system which is substantially the same as the suspension system shown in FIG. 3, and Japanese Patent Application Laid-Open No. 62-96137 discloses rolling and pitching. A suspension device is disclosed in which the rear of the carrier case is supported by an elastic body so as to be absorbed, and the front is supported by a cross member via a bush.

[0005]

In the conventional diff suspension system described above, the distance L1 between the mounts is increased in order to reduce the force received by the mounts due to the rolling of the mount arms. is there. That is,
There is a limit to how long the distance L1 can be made from the relationship with the vehicle space where the mount arm is attached, and the rolling force of the mount arm cannot sufficiently reduce the force received by the mount. Function and two functions to support the weight of the differential are required, which complicates the structure and causes problems in productivity and cost. If the length of the mount arm is prioritized in order to reduce this force sufficiently, there will be interference with other mounted devices, which limits the mounting of various devices and makes designing difficult. There is a problem in terms of sex. Further, since the length of the mount arm is increased to reduce the force applied to the mount, there is a problem that the suspension device becomes large.

When the carrier case is suspended and supported by the cross member through the bush like the suspension disclosed in Japanese Patent Laid-Open No. 62-96137, both the weight of the differential and the rolling are applied to the bush. However, there is a problem that the structure of the bush that supports the weight of the differential while suppressing the rolling becomes complicated.

SUMMARY OF THE INVENTION The present invention provides a differential gear suspension system in which the length of the mount arm is shortened to suppress the rolling of the mount arm and the force applied to the mount is reduced to solve the above problems.

[0008]

Means for Solving the Problems According to the present invention for solving the above problems, a mount arm is fixed to a carrier case in which a differential gear is incorporated, and mounts are provided at both ends of the mount arm. In the suspension of the differential gear in which the differential gear is suspended, the ends of the substantially U-shaped stabilizer are connected to the mount arms on both sides of the fixed portion between the mount arm and the carrier case. The stabilizer is supported on the vehicle body side.

[0009]

Since the present invention is constructed in this way, it has the following actions. That is, since the end portions of the substantially U-shaped stabilizer are connected to the mount arms on both sides of the fixing portion between the mount arm and the carrier case, and the stabilizer is supported on the vehicle body side, the fixing portion is Rolling generated in the mount arm around the center is suppressed by being pressed by the end portions of the stabilizers connected to each other with the fixed portion sandwiched therebetween. The restraining force is obtained by the elastic force of the stabilizer generated by restraining the movement of the stabilizer by supporting the stabilizer on the vehicle body side. This makes it possible to suppress the rolling of the mount arm regardless of the length of the mount arm, and reduce the force exerted on the mount by the rolling of the mount arm.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a mount arm 7 is fixed to a carrier case 6 incorporating a differential. This mount arm 7 has mounts 8 provided at both ends thereof.
Is attached to the vehicle body side (not shown). An end portion of a substantially U-shaped stabilizer 9 is connected to the mount arm 7 via a joint 10 with a fixed portion P between the carrier case 6 and the mount arm 7 interposed therebetween.
The stabilizer 9 is fixed to the body side of the vehicle body (not shown) by a mount 11.

The operation of the present embodiment thus constructed will be described below. Since the rotational driving force of the propeller shaft 3 is transmitted to the drive shaft 5 via the differential incorporated in the carrier case 6, the mount arm 7 rolls around the fixed portion P as a center. Then, by connecting the ends of the stabilizer 9 formed in a substantially U shape to the mount arms 7 on both sides of the fixed part P via the joint 10, the rolling is pressed by the ends of the stabilizer 9. To be suppressed.

The restraining force is the stabilizer 9
Is supported on the vehicle body side via a mount 11, and the movement of the stabilizer 9 is restrained.
It is obtained by the elastic force of. As a result, the rolling of the mount arm 7 can be suppressed regardless of the length L2 of the mount arm 7, and the force exerted on the mount 8 by the rolling of the mount arm 7 can be reduced.

Further, by strengthening the elastic force of the stabilizer 9 to almost certainly suppress the rolling of the mount arm 7, the mount 8 contributes only to support the weight of the differential, and the rolling of the mount arm 7 contributes to the stabilizer. The function of supporting the weight of the differential and the function of suppressing the rolling can be surely shared by suppressing the weight of the differential.

[0014]

As described above in detail, according to the present invention, the ends of the substantially U-shaped stabilizers are mounted on the mount arms on both sides of the fixed portion between the mount arm and the carrier case incorporating the differential gear. Connect the parts,
Since the stabilizer is supported on the vehicle body side, the rolling generated in the mount arm around the fixed portion can be suppressed by being pressed by the end portion of the stabilizer connected with the fixed portion interposed therebetween. This allows
Since the rolling of the mount arm can be suppressed regardless of the length of the mount arm, the length of the mount arm can be shortened to reduce the size of the suspension device, and the flexibility at the design planning stage can be expanded. It is possible,
Moreover, since the function of suppressing the rolling of the mount arm and the function of supporting the weight of the differential can be shared, it is possible to simplify the structure of the mount and improve the productivity and reduce the cost.

[Brief description of drawings]

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

FIG. 2 is an explanatory view schematically showing the entire drive mechanism of a vehicle.

FIG. 3 is a perspective view of a conventional example.

[Explanation of symbols]

 5 Drive shaft 6 Carrier case 7 Mount arm 8 Mount 9 Stabilizer

Claims (1)

[Claims] 1. A suspension for a differential gear, wherein a mount arm is fixed to a carrier case in which a differential gear is incorporated, and the differential gear is suspended via mounts provided at both ends of the mount arm. A differential gear suspension characterized in that the ends of a substantially U-shaped stabilizer are connected to the mount arms on both sides of the fixed portion between the arm and the carrier case, and the stabilizer is supported on the vehicle body side. apparatus.