JP2594796Y2 - Strut mount - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strut mount used for a strut type suspension system of a vehicle.

[0002]

2. Description of the Related Art Conventionally, as a strut mount,
An inner cylindrical fitting having an axial hole through which the operating shaft of the shock absorber is inserted and attached to the operating shaft, and an outer cylindrical fitting extending in the centrifugal direction and having a mounting flange portion attached to the vehicle body;
There is known one having a cylindrical rubber elastic body interposed between an inner cylinder and an outer cylinder. Here, due to the elastic deformation of the rubber elastic body, vibration and impact from the wheels are absorbed.

[0003] Then, a cylindrical rubber insulator having a cylindrical cover portion and a seat portion extending in a flange shape in a centrifugal direction from one end of the cover portion is used, and the seat portion of the rubber insulator is connected to the outer cylindrical metal fitting. It is seated on a mounting flange, thereby enhancing the vibration isolation, and the cover of the rubber insulator surrounds the operating shaft of the shock absorber to protect the operating shaft.

[0004]

When the rubber insulator is mounted on the strut mount so that the seat portion of the rubber insulator is seated on the mounting flange portion of the outer tube fitting, the rubber insulator is supported so as not to fall off. It is necessary, but this is not easy. The present invention has been made in view of the above-described circumstances, is advantageous in preventing the rubber insulator from falling off, and can be expected to further improve the vibration isolation property. An object of the present invention is to provide a strut mount that can also avoid lateral displacement and is advantageous for maintaining the original purpose of the rubber insulator.

[0005]

The strut mount according to the present invention has an axial hole through which the operating shaft of the shock absorber is inserted, and is mounted on the operating shaft. An outer cylinder having a mounting flange portion extending in the direction and attached to the vehicle body, a cylindrical rubber elastic body interposed between the inner cylinder and the outer cylinder, and substantially coaxially fixed to the outer cylinder. A cylindrical fixing bracket for receiving a bound stopper for restricting the axial displacement of the operating shaft, a cylindrical cover surrounding the operating shaft, and a seat extending in a centrifugal flange shape from one end of the cover. And a seat part is interposed between a cylindrical rubber insulator seated on the mounting flange part of the outer cylindrical metal part and a fixing metal part and a seat part of the rubber insulator, and is press-fitted into the outer peripheral surface of the fixing metal part. Surface is rubber insulator And it is characterized in that it is constituted by an organic polymeric material made of the intermediate cylinder as the guide engaging surface for engaging with substantially coaxially guiding the inner peripheral surface of the seat.

The intermediate cylinder is made of an organic polymer material such as rubber or resin.

[0007]

An intermediate cylinder made of an organic polymer material is provided on the outer peripheral surface of the fixture. Therefore, when assembling the rubber insulator, the inner peripheral surface of the seat portion of the rubber insulator is guided substantially coaxially with the guide engagement surface of the intermediate cylinder, and the inner peripheral surface of the seat portion is guided by the guide member of the intermediate cylinder. Engage with mating surfaces. Therefore, at the time of assembly, the rubber insulator is temporarily held by the outer tube fitting.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the strut mount of the present invention will be described below with reference to the drawings. The strut mount includes an inner cylinder 1, an outer cylinder 2, and a rubber elastic body 3.
And a cylindrical fixing bracket 4 and a cylindrical rubber insulator 5
And an intermediate cylinder 6.

The inner cylinder 1 has a shaft hole 10 and a flange 11 extending in the centrifugal direction. The outer tube 2 has a tube 20 provided substantially coaxially with the inner tube 1 and a mounting flange 21 extending in the centrifugal direction and having a bent portion 21a. A bolt 23 is attached to the through hole 22 of the attachment flange 21. The outer tube fitting 2 includes a first fitting 2a and a second fitting 2b fixed thereto by welding. Outer tube fitting 2
A rubber seal 25, which is vulcanized and molded into a ring shape and seals a boundary area with the vehicle body, is adhered to.

The rubber elastic body 3 is vulcanized and bonded to the inner cylinder 1 and is sandwiched between the first and second metal fittings 2a and 2b of the outer cylinder 2 and interposed therebetween. Ring-shaped grooves 30 and 31 are formed in the rubber elastic body 3. The fixing bracket 4
A cylindrical portion 4 having a bent portion 41 bent outward in a radial direction at a lower end portion.
0 and an inner flange portion 42 integrally extended at the upper end of the cylindrical portion 40. The fixing bracket 4 includes an inner flange portion 42.
Are welded and fixed substantially coaxially to the second metal fitting 2b of the outer cylindrical metal fitting 2. A vulcanized rubber bound stopper 7 is press-fitted into the fixture 4. Note that an insertion hole 70 is formed in the bound stopper 7. A ring 71 for adjusting the degree of elasticity of the bound stopper 7 is attached to the outer peripheral portion near the contact surface 7a.

The rubber insulator 5 has a thin cylindrical cover portion 50 and a relatively thick seat portion 52 extending from an upper end of the cover portion 50 in a flange shape in a centrifugal direction. The intermediate cylinder 6 is made of vulcanized rubber. The intermediate cylinder 6 is stretched in the circumferential direction and elastically restored after passing over the outer peripheral end of the bent portion 41, so that the intermediate cylinder 6 is press-fitted into the cylindrical portion 40 of the fixture 4. Have been. Therefore, the inner peripheral surface 6c of the intermediate cylinder 6 is pressed against the outer peripheral surface of the cylindrical portion 40. Here, the outer peripheral surface of the intermediate cylinder 6 serves as a guide engagement surface 60 that guides the inner peripheral surface 52a of the seat portion 52 of the insulator 5 substantially coaxially and engages with a frictional force. A plan view of the intermediate cylinder 6 is shown in FIG.
As shown in FIG. 2, a plurality of shallow grooves 62 for facilitating press-fitting are formed in the inner peripheral surface 6 c of the intermediate cylinder 6 in the axial direction. On the surface 60,
A plurality of minute projections 63 for improving the engagement are formed in an arc shape in the circumferential direction.

When assembling the strut mount, the operating shaft 80 of the shock absorber 8 is inserted through the insertion hole 70 of the bound stopper 7 and the shaft hole 10 of the inner cylinder 1, and the upper end of the operating shaft 80. Nut 83
Are screwed together, whereby the inner tube fitting 1 is attached to the operating shaft 80. Further, the bolt 23 of the outer cylinder 2 is screwed to the vehicle body, whereby the mounting flange 21 of the outer cylinder 2 is mounted on the vehicle.

In this embodiment, at the time of assembly, the seat 52 of the rubber insulator 5 is fitted into the guide engagement surface 60 of the intermediate cylinder 6 with a slight press fit, and the seat 52 is attached to the mounting flange of the outer cylinder fitting 2. It is seated on the lower surface 21c of the part 21. As described above, since the inner peripheral surface 6c of the intermediate cylinder 6 is pressed against the outer peripheral surface of the cylindrical portion 40, the intermediate cylinder 6 is prevented from being displaced and idling, and therefore the seat 52 can be easily fitted into the intermediate cylinder 6. Can be secured.
Also, even if the inner diameter of the seat portion 52 varies somewhat due to vulcanization shrinkage or the like,
Since the deformation of the rubber-made intermediate cylinder 6 is allowed, the seat portion 52 can be fitted well into the guide engagement surface 60 of the intermediate cylinder 6. In the seated state as described above, the operating shaft 80 of the shock absorber 8 is surrounded by the cover 50 of the rubber insulator 5, and the operating shaft 80 is protected. Note that the axial displacement of the operating shaft 80 of the shock absorber 8 is restricted by the bound stopper 7.

As described above, according to the present embodiment, the seat portion 52 of the rubber insulator 5 is connected to the guide engagement surface 6 of the intermediate cylinder 6.
The rubber insulator 5 can be temporarily held by the outer cylinder fitting 2 by the intermediate cylinder 6 so that the rubber insulator 5 does not fall off. Therefore, the work of assembling the rubber insulator 5 can be facilitated. In addition, in this embodiment, since the shallow groove 62 is formed on the inner peripheral surface of the intermediate cylinder 6, it is advantageous to press-fit the intermediate cylinder 6 into the fixture 4. Furthermore, since the minute projection 63 is formed on the guide engagement surface 60 of the intermediate cylinder 6,
The engagement between the guide engagement surface 60 and the inner peripheral surface 52a of the seat portion 52 can be enhanced, and the temporary holding ability of the rubber insulator 5 can be further enhanced.

Further, since the seat 52 of the rubber insulator 5 is fitted into the guide engagement surface 60 of the intermediate cylinder 6, an abnormal lateral displacement of the rubber insulator 5 during traveling of the vehicle can be avoided. This is advantageous for maintaining the vibration isolation property as described above and the protection property of the operating shaft 80. In addition, since the intermediate cylinder 6 is made of rubber, further improvement in vibration isolation can be expected as compared with the case where only the rubber insulator 5 is used. It is also advantageous in terms of sex.

[0016]

[Effect of the invention] According to the strut mount of the invention,
The seat portion of the rubber insulator is fitted into the guide engagement surface of the intermediate cylinder, and the rubber insulator is temporarily held by the outer cylinder fitting so that the rubber insulator does not fall off. Therefore, it is possible to easily assemble the rubber insulator. Moreover, since the intermediate cylinder is made of an organic polymer material, further improvement in vibration isolation can be expected as compared to the case where only the rubber insulator is used. It is also advantageous in terms of rust.

Further, according to the strut mount of the present invention, since the seat portion of the rubber insulator is fitted into the guide engagement surface of the intermediate cylinder, an abnormal lateral displacement of the rubber insulator during running of the vehicle can be avoided. This is advantageous for maintaining the original purpose.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a strut mount.

FIG. 2 is a plan view of an intermediate cylinder.

[Explanation of symbols]

In the figure, 1 is an inner cylinder, 10 is a shaft hole, 2 is an outer cylinder, 21
Is a mounting flange, 3 is a rubber elastic body, 4 is a fixing bracket, 5
Is a rubber insulator, 50 is a cover, 52 is a seat,
6 is an intermediate cylinder, 60 is a guide engagement surface, and 7 is a bound stopper.

Claims (1)

(57) [Scope of request for utility model registration] 1. An inner cylinder having a shaft hole through which an operation shaft of a shock absorber is inserted, the inner cylinder being mounted on the operation shaft, being provided substantially coaxially with the inner cylinder, extending in a centrifugal direction, and being mounted on a vehicle body. An outer cylinder having a mounting flange; a cylindrical rubber elastic body interposed between the inner cylinder and the outer cylinder; an axial direction of the operating shaft fixed substantially coaxially to the outer cylinder; A cylindrical stopper for receiving a bound stopper for restricting displacement of the cylinder, a cylindrical cover surrounding the operating shaft, and a seat extending in a flange shape in a centrifugal direction from one end of the cover. A cylindrical rubber insulator in which the seat is seated on the mounting flange of the outer cylindrical metal fitting; and a press-fitted outer peripheral surface of the fixed metal fitting that is interposed between the fixing metal fitting and the rubber insulator seat. , The outer peripheral surface is the inner peripheral surface of the seat of the rubber insulator. Strut mount, characterized in that is composed of substantially organic polymeric material made of the intermediate cylinder as the guide engaging surface for engaging with coaxially guided.