JPS631605Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a suspension system for the case of a power transmission mechanism. Even if the power transmission mechanism vibrates, it effectively absorbs it, prevents it from propagating to the vehicle body, and keeps it constant. When a vibration larger than the value occurs,
It is designed to absorb and restrain the displacement caused by this vibration.

Since power transmission mechanisms such as differential carriers vibrate during engine operation, they are suspended from the vehicle body through a cushioning material such as rubber. In conventional suspension systems, a cushioning material made of an elastic material such as rubber is interposed between the upper part of a power transmission mechanism such as a differential housing and a differential carrier and a corresponding part on the vehicle body side. It is common to do so. Conventional suspension systems having such a structure have had the problem that the hardness and spring constant of the cushioning material cannot be significantly lowered due to their structure. For this reason, it could not be said to be sufficient in terms of vibration suppression.

This invention was made in view of this point, and one embodiment of the invention will be explained with reference to the drawings.In Fig. 1, 1 is a differential carrier;
Its front part (left end in the figure) is connected to the differential housing. A hole 2 is provided in the rear upper part of the differential carrier 1 in the horizontal direction, and a bolt 4 inserted through the hole 2 through a composite cushioning material 3, which will be described next, is connected to the vehicle body (not shown). ) The differential carrier 1 is attached to the bracket 5 on the side. 6 is a nut screwed onto the bolt 4.

The composite cushioning material 3 consists of a cushioning material 8 of low hardness (approximately Hs 40°) having a flange 7 at the end, and a cushioning material 8 having a slightly different diameter from the cushioning material 8 and having high hardness (approximately 60° Hs) between them. 9 are provided, and a collar 12 is inserted through holes 10 and 11 provided in these holes. As shown in FIG. 2, this composite cushioning material 3 is constructed by placing a cushioning material 8 with its flange 7 outside the hole 2 of the differential carrier 1, and sandwiching the cushioning material 9 between them. position and fit into hole 2. In this case, due to the difference in the diameters of the cushioning materials 8 and 9, the cushioning material 8 is tightly fitted into the hole 2, and the cushioning material 9 is fitted into the hole 2 with a gap 13 left in the outer periphery. A bracket 5 whose upper portion is attached to a cross member 14 of a vehicle body is integrated with bolts 4 and nuts 6 so as to sandwich the outside of a flange 7 of a cushioning material 8.

In FIG. 1, the front part of the differential carrier 1 is connected to the differential housing as described above, but that part is connected to the bracket 1.
5 and a front mounting 16, it is supported by a bracket 18 that is integrated with a pipe frame 17 on the vehicle body side. That is, bracket 1
5 is provided with holes 19 on both sides, and this hole 1
9 and the hole 21 provided in the bracket 18,
By inserting the bolt 22 that integrally attaches the upper part 20 to the front mounting 16,
The front part of the differential carrier 1 will be supported. and front mounting 1
A cushioning material 23 having medium hardness (approximately Hs 50°) is integrally attached to the inside of the housing 6 by baking.

In this suspension system configured in this way, when the differential carrier 1 vibrates in the vertical direction in FIG. 1, if the vibration is small, the vibration is absorbed by the deformation of the low-hardness cushioning material 8. I will do it. This makes it difficult for vibrations of the differential carrier 1 to be transmitted to the cross member 14 side of the vehicle body. When the vibration increases, the gap 13 decreases, and the vibration (displacement amount) is absorbed by the hard buffer material 9.

The embodiment described above has a structure in which the differential carrier 1 is attached to the cross member 14 of the vehicle body, but in a similar structure, the engine, transmission, and transmission are installed in a front-engine, front-wheel drive vehicle (FF vehicle). It can also be applied when attaching a case such as A to a vehicle body.

As mentioned above, in this invention, a composite cushioning material 3 having a low-hardness cushioning material 8 at both ends and a high-hardness cushioning material 9 sandwiched between them is inserted into a hole 2 provided in the case of the power transmission mechanism. The cushioning material 8 is fitted tightly, the hardness cushioning material 9 is fitted with a gap 13, and the composite cushioning material 3 is fitted.
Since the power transmission mechanism is supported on the vehicle body by inserting the bolt 4 inserted into the bracket 5 on the vehicle body side, small vibrations can be absorbed by the low-hardness buffer material 8, and large vibrations can be absorbed by the high-hardness buffer material 9. Then,
By using cushioning materials with different hardnesses, it is possible to obtain a compact cushioning material with a large cushioning capacity, and it is possible to incorporate a cushioning material with a large capacity into a small space in the hole provided in the case of the power transmission mechanism. Since there is no need to use parts such as brackets, a suspension device with a simple structure can be obtained, and the degree of cushioning can be easily set.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of this invention, and FIG. 2 is an enlarged sectional view of the main parts in FIG. 1. 1... Day differential carrier, 2...
Hole, 3...Composite buffer material, 4...Bolt, 5...Bracket, 8, 9...Buffer material, 13...Gap, 1
4...Cross member of the car body.

Claims (1)

[Scope of utility model registration request] In a suspension system for suspending a case of a power transmission mechanism on a vehicle body, a hole provided in the case of the power transmission mechanism is provided with a low-hardness cushioning material at both ends, and a high-hardness cushioning material is placed between the low-hardness cushioning materials. The sandwiched composite shock absorbing material is fitted tightly into the low hardness shock absorbing material and with a gap left between the high hardness shock absorbing material, and the bolt passed through the composite shock absorbing material is inserted into the bracket on the vehicle body side to connect the power transmission mechanism. A suspension device for a case of a power transmission mechanism, characterized in that the case is supported on a vehicle body.