JPS6013683Y2 - Automobile rear wheel suspension system - Google Patents

Description

[Detailed explanation of the idea] This project is an improvement to the rear wheel suspension system of automobiles.

In the conventional automobile rear wheel suspension system, as shown in FIG. Because of this, the lateral stiffness is low.
The displacement of training arms b and c with respect to the load P (twisting around the longitudinal axis of training arms b and c) is large, and the steering stability is poor.

■The diameter and plate thickness of the shock absorber (not shown) interposed between the training arms b, c and the vehicle body must be increased, leading to an increase in cost and weight.

In addition, since the front part of the differential device e is attached to the cross member a fixed to the vehicle body, inputs such as wind-up of the differential device e are directly transmitted to the vehicle body via the cross member a, causing vibrations and vibrations of the vehicle body. There was a problem with making noise louder.

This proposal addresses the above-mentioned problems, and includes a center pipe that extends in the width direction of the vehicle and is rotatably attached to the vehicle body via fixtures at both ends, and a training arm that is fixed to the center pipe and rotatably fitted to the center pipe. a differential gear whose front part is fixed to the center pipe and whose rear part is supported by the vehicle body via an elastic member; This invention relates to a rear wheel suspension system for an automobile, comprising a housing rotatably supporting an extended wheel drive shaft, and a shock absorber interposed between each of the training arms and the vehicle body. The objective is to improve steering stability.

Another object of the present invention is to provide an improved rear wheel suspension system for an automobile that can reduce the cost and weight of a shock absorber, as well as vehicle body vibration and noise.

Next, the rear wheel suspension system of the present invention will be explained with reference to an embodiment shown in Figs.
Center pipes 10 and 11 are rotatably attached to the vehicle body; 3 and 4 are outer pipes to which the training arms 1 and 2 are fixed, respectively; and outer pipes 14 are rotatably fitted to the center pipe 5; A differential device 18 and 19 is fixed to the center pipe 5 and supported by the vehicle body via a plate spring (elastic member) at the rear end, and the differential device 18 and 19 are fixed to the rear end portions of each of the training arms 1 and 2, respectively. A housing 12.13 rotatably supports wheel drive shafts 16.17 extending from the housing, and 12.13 is a shock absorber interposed between each training arm 1, 2 and the vehicle body.

Note that the bushings 6, 7, 8, and 9 are made of synthetic resin or the like.

Further, as shown in FIG. 4, the fixture 10.11 has a bushing 20 interposed between the small diameter portions 5a and 5b protruding from both ends of the large diameter portion of the center pipe 5, and a bushing 20 interposed between the vehicle body side member. It has a bushing of 21.22.

Further, in the present device, the length of the outer pipe 3.4 corresponds to the span of the training arms 1, 2, and the support span is much longer than that of the conventional device.

As described above, the rear wheel suspension system of the present invention has a center pipe 5 which extends inward of the vehicle and is rotatably attached to the vehicle body at both ends via fixtures 10 and 11, and training arms 1 and 2 are respectively fixed to the center pipe. outer pipes 3 and 4 rotatably fitted to the center pipe 5, a differential device 14 whose front part is fixed to the center pipe 5 and whose rear part is supported by the vehicle body via an elastic member 15, and each of the training arms 1, housings 18 and 19 which are fixed to the rear ends of the training arms 1 and 2 and rotatably support wheel drive shafts 16 and 17 extending from the differential gear 14, and between each of the training arms 1 and 2 and the vehicle body; Interposed buffer device 12
．． 13, the lateral rigidity is high and the displacement of the training arm 1.2 against the load P (see Figure 1) is
(displacement around the longitudinal axis of the training arms 1 and 2) is almost non-existent, and the steering stability can be improved.

■Buffer device (shock absorber with spring) installed between training arms 1 and 2 and the vehicle body 12.13
The diameter and thickness of the shock absorbers 12 and 13 can be reduced, and the cost and weight of the shock absorbers 12 and 13 can be reduced.

Further, in the rear wheel shock absorbing device of the present invention, the front part of the differential gear 14 is placed in the center of the center pipe 5, as described above.
4 is attached to the vehicle body by an elastic member 15 or the like, and a wheel drive shaft 16 extending from the differential device 14.
．． 17 is rotatably supported by housings 18 and 19 fixed to the other ends of the training arms 1 and 2, so the wind-up and vertical movement of the differential gear 14 is absorbed by the rotation of the center pipe 5. Avoid transmitting information to the car body.

Therefore, vibration and noise of the vehicle body can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a conventional rear wheel suspension system for an automobile, Fig. 2 is a plan view showing an embodiment of an automobile rear wheel suspension system according to the present invention, and Fig. 3 is a side view of the shock absorber. FIG. 4 is a longitudinal sectional side view of the fixture, and FIG. 5 is a side view of the differential gear. 1.2...Training arm, 3,4...
... Outer pipe, 5 ... Center pipe, 6,7゜8.9 ... Bush, 10,11.
...Fixture, 12, 13...
Buffer device, 14... Differential device, 15...
・Plate spring, 16.17...Wheel drive shaft, 18,
19...Housing.

Claims (1)

[Scope of utility model registration request] A center pipe extending in the direction of the table and rotatably attached to the vehicle body at both ends via fixtures, an outer pipe to which the training arms are respectively fixed and rotatably fitted to the center pipe, and a front portion attached to the center pipe. a differential device that is fixed and whose rear part is supported by the vehicle body via an elastic member; and a housing that is fixed to the rear end of each of the training arms and rotatably supports a wheel drive shaft extending from the differential device. A rear wheel suspension system for an automobile, comprising a shock absorber interposed between each of the training arms and the vehicle body.