JPH0558988U - mount - Google Patents

Abstract

(57) [Summary] [Purpose] When vibration is input, the first and second retaining rings 3
2, 34 and the counterpart supporting member 20 held between them are prevented from generating a metallic sound. An upper bush 30A coaxially connecting a first washer 31 and a first holding ring 32 with a first elastomer ring 33, and a second holding ring 34 facing the first holding ring 32. And a lower bush 30B coaxially connecting a second washer 35 with a second elastomer ring 36. The mounting hole 2 of the mating support member 20 is provided.
The peripheral edge portion of the first holding ring 3 is held in a state of being sandwiched between the first and second holding rings 32 and 34, and
A male screw portion 37 is provided on one of the reference numerals 2, 34, a female screw portion 22 is provided on the mounting hole 21, and the male screw portion 37 and the female screw portion 22 are screwed together.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration isolating mount, for example, used for mounting a center bearing support that supports a propeller shaft in an automobile.

[0002]

[Prior Art]

 The propeller shaft of an automobile is rotatably supported by a center bearing support 10 as shown in FIG. 2. The center bearing support 10 has a bracket 20 and a mount 30 having vibration-proofing functions at both ends of the bracket 20. Is attached to the bottom of the vehicle.

As shown in FIG. 3, the mount 30 is composed of an upper bush 30A and a lower bush 30B. Of these, the upper bush 30A has a first upper end where a sleeve 31a is integrally extended from the inner diameter. A washer 31, a first retaining ring 32 arranged on the outer circumference of the sleeve 31a, and a first elastomer ring vulcanized and bonded between the first washer 31 and the first retaining ring 32. 33. The lower bush 30B includes a second holding ring 34 arranged on the outer periphery of the sleeve 31a and facing the first holding ring 32, and a second washer 35 loosely fitted to the lower end of the sleeve 31a. It has a second elastomer ring 36 vulcanized and bonded between the second washer 35 and the second retaining ring 34. That is, in this mount 30, the peripheral portion of the mounting hole 21 formed in the bracket 20, which is the mating support member, is sandwiched in the groove formed between the first and second holding rings 32, 34. In this state, it is assembled and fixed by the bolt 40 inserted through the sleeve 31a.

[0004]

[Problems to be solved by the device]

 However, the mount 30 having the above-mentioned conventional structure is capable of holding the clamping force of the first and second retaining rings 32 and 34 against the bracket 20 of the center bearing support 10 and the repulsive force of the first and second elastomer rings 33 and 36 against compression. Since there is a gap between the bracket 20 and the first and second retaining rings 32 and 34, there is a risk that they will collide with each other and generate a metallic sound when vibration is input. .

The present invention has been made in view of the above problems, and an object of the present invention is to provide first and second holding rings and a mating support held between them when a vibration is input. This is to prevent the generation of metallic noise due to the collision with the member.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention confronts the upper bushing in which a first washer at one end and a first retaining ring are coaxially connected by a first elastomer ring and the first retaining ring. The second holding ring and the lower washer at the other end are coaxially connected to each other by the second elastomer ring, and the lower bush is provided. In a mount held between the second retaining rings, a male screw portion is provided on one of the first and second retaining rings, and a female screw portion is provided on the mounting hole. The screw part and the female screw part are screwed together.

[0007]

[Action]

 According to the above configuration, since the mating support member such as the bracket of the center bearing support and the first holding ring or the second holding ring are screwed together, the mating support member and the first and second holding rings are screwed together. The second retaining ring does not float and collide with each other.

[0008]

【Example】

 Next, the present invention will be described with reference to the embodiment shown in FIG. The same parts as those of the conventional structure shown in FIG. 3 described above are designated by the same reference numerals, and the individual description thereof will be omitted.

That is, in the present embodiment, the first holding ring 32 in the upper bush 30A is formed in a flat washer shape, while the second holding ring 34 in the lower bush 30B is formed on the inner diameter side of the first holding ring 32. The tubular projection 34a is formed into a substantially L-shaped cross section, and the male screw 37 is provided on the outer peripheral surface of the tubular projection 34a. A female screw portion 22 to be screwed with the male screw portion 37 is provided on the inner peripheral surface. Further, the female screw portion 22 is formed with an annular protruding portion 21a at the peripheral edge of the mounting hole 21 to secure a length longer than the wall thickness of the bracket 20.

In the mount 30 having the above structure, the lower portion of the sleeve 31a extending from the first washer 31 of the upper bush 30A is inserted into the mounting hole 21 of the bracket 20, and the lower bush 30B is attached to the lower portion of the sleeve 31a. While fitting from the side of the second holding ring 34, the male screw portion 37 of the cylindrical protrusion 34a is screwed into the female screw portion 22 on the inner peripheral surface of the mounting hole 21, and penetrates the inner periphery of the sleeve 31a. The bolt 40 is tightened and fixed to the vehicle body side by screwing the bolt 40. Then, the first and second retaining rings 32 and 34 are pressed against each other.

That is, according to this structure, since the second holding ring 34 and the bracket 20 are integrated by screwing the male screw portion 37 and the female screw portion 22, it is possible to prevent the second holding ring 34 and the bracket 20 from loosely contacting each other. Absent. Further, the first and second retaining rings 32, 34 are always in pressure contact with each other by the elastomer rings 33, 36, and the first retaining ring 32 is of the second retaining ring 34 due to the vibration input from the bracket 20. Since the displacements are integrally tracked, the holding rings 32 and 34 do not come into contact with or separate from each other, and therefore the generation of metallic noise can be prevented.

In the illustrated embodiment, the male screw portion 37 is provided on the second holding ring 34 on the lower bush 30B side, but it is provided on the first holding ring 32 on the upper bush 30A side. However, the same effect can be achieved, and the shapes of other details are not limited to those shown in the drawings.

[0013]

[Effect of the device]

 As described above, according to the mount of the present invention, since the mating support member such as the bracket of the center bearing support and the first holding ring or the second holding ring are screwed with each other, the mating support member and the first supporting ring are The second retaining ring and the second retaining ring do not float and collide with each other, so that it is possible to prevent the generation of metallic noise during vibration input.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a mount according to the present invention.

FIG. 2 is an explanatory diagram showing a usage example of a mount on a center bearing support.

FIG. 3 is a cross-sectional view showing an example of a mount having a conventional structure.

[Explanation of symbols]

 20 bracket (counterpart support member) 21 mounting hole 21a protrusion 22 female screw part 30 mount 30A upper bush 30B lower bush 31 first washer 31a sleeve 32 first retaining ring 33 first elastomer ring 34 second holding Ring 34a Cylindrical protrusion 35 Second washer 36 Second elastomer ring 37 Male screw 40 Bolt

Claims (1)

[Scope of utility model registration request] 1. An upper bush 30A coaxially connecting a first washer 31 and a first retaining ring 32 at one end with a first elastomer ring 33, and a first bushing 30A facing the first retaining ring 32. A lower bush 30B coaxially connecting a second holding ring 34 and a second washer 35 at the other end with a second elastomer ring 36 is provided, and the peripheral portion of the mounting hole 21 of the mating support member 20 is defined as described above. In a mount held in a state of being sandwiched between the first and second holding rings 32, 34, the first and second holding rings 3
A male screw part 37 is provided on one of the second and second parts 34, a female screw part 22 is provided on the mounting hole 21, and the male screw part 37 and the female screw part 22 are screwed together. ..