JPH0594544U - Anti-vibration mount - Google Patents

Abstract

(57) [Abstract] [Purpose] With respect to an annular vibration proof mount mounted on the inner peripheral edge of the mounting hole 22 formed in the bracket, the bracket and the vibration proof mount are prevented from rattling in the radial direction. A bracket mounting hole 22 has an oval or elliptical opening shape, and a flat width 7 is provided on a bottom wall portion 6 of an engaging groove 3 of a rigid member on the outer peripheral side. 22
The length of the wide part of A is A, the length of the narrow part of the mounting hole 22 is B,
A> C, where C is the diameter of the bottom wall 6 and D is the width of the width across flats 7.
>B> D, insert the divided bodies 2a, 2b of the rigid member on the outer peripheral side into the mounting holes 22, and then rotate them by approximately 90 degrees, so that the divided bodies 2a, 2b become the inner peripheral edge of the mounting holes 22. Fit from the inner circumference side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an anti-vibration mount.

[0002]

[Prior Art]

 The propeller shaft of an automobile drive system is rotatably and elastically supported by a center bearing support 11 as shown in FIG. 5, and this center bearing support 11 has a bracket 21 and a plurality of anti-vibration mounts 1 therebetween. Is attached to the vehicle body. As shown in the enlarged view of FIG. 6, the vibration-proof mount 1 is formed in an annular shape so that it can be attached to the inner peripheral edge portion 23 of the attachment hole 22 provided in the bracket 21, that is, it has an annular shape. An annular engaging groove 3 that engages with the inner peripheral edge portion 23 is provided on the outer peripheral surface, and the rigid member 2 on the outer peripheral side is divided into two upper and lower divided bodies 2a and 2b so as to sandwich the inner peripheral edge portion 23. An annular elastic member 4 made of a rubber-like elastic material connected to the inner peripheral side of the rigid member 2 on the outer peripheral side, and an annular inner peripheral rigid member 5 connected to the inner peripheral side of the elastic member 4, have. The elastic body 4 and the inner rigid member 5 are also divided into two divided bodies. The opening shape of the mounting hole 22 is circular as shown in FIG.

[0003]

[Problems to be solved by the device]

 The above conventional technique has the following problems. That is, as shown in FIG. 6, a radial gap may be formed between the inner peripheral surface of the inner peripheral edge portion 23 of the mounting hole 22 and the bottom wall of the engagement groove 3 due to dimensional tolerance. When such a gap is generated, the bracket 21 and the vibration-proof mount 1 rattle in the radial direction.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art, and in order to achieve this object, it is mounted on the inner peripheral edge of the mounting hole provided in the bracket. An annular antivibration mount, which has an annular shape and is provided with an annular engagement groove on its outer peripheral surface for engaging the inner peripheral edge portion, and is divided into two divided bodies so as to sandwich the inner peripheral edge portion. A rigid member, an elastic body made of a rubber-like elastic material connected to the inner peripheral side of the outer peripheral side rigid member, and an inner peripheral side rigid member connected to the inner peripheral side of the elastic body. In the anti-vibration mount, the opening shape of the mounting hole is oval or elliptical, and the width of the wide part of the mounting hole is set to be wide by providing a flat width on the bottom wall of the engaging groove of the rigid member on the outer peripheral side. A, the length of the narrow portion of the mounting hole is B, the diameter of the bottom wall portion is C, and the width of the above-mentioned two flat widths is Providing a vibration damping mount which is characterized in that the A> C> B> D as.

[0005]

[Action]

 Insert each divided body of the rigid member on the outer peripheral side into the mounting hole in a state where the width across flats provided on the rigid member on the outer peripheral side matches the narrow portion of the mounting hole (first step), and then The divided body is rotated by approximately 90 degrees (second step). In the first stage, B and D have the same orientation, A and C have the same orientation, and since B> D and A> C, each divided body is loosely inserted into the mounting hole. In the second stage, since C and D rotate about 90 degrees from the state of the first stage, B and C have the same orientation and A and D have the same orientation, and C> B and A> Since D and especially C> B, each divided body is fitted into the inner peripheral edge of the mounting hole from the inner peripheral side.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the anti-vibration mount 1 has an annular shape so that it can be mounted on the inner peripheral edge portion 23 of the mounting hole 22 provided in the bracket 21, that is, it has an annular shape. An annular engaging groove 3 that engages with the inner peripheral edge portion 23 is provided on the outer peripheral surface thereof, and the outer peripheral side rigid member 2 is divided into two upper and lower divided bodies 2a and 2b so as to sandwich the inner peripheral edge portion 23, An elastic body 4 made of a rubber-like elastic material connected to the inner peripheral side of the outer peripheral side rigid member 2, and an annular inner peripheral side rigid member 5 connected to the inner peripheral side of the elastic body 4. ,have. The elastic body 4 and the rigid member 5 on the inner peripheral side are also divided into two divided bodies 4a, 4b, 5a, 5b. It should be noted that FIG. 1 shows a state where the vibration proof mount 1 is completely attached (the second stage).

By dividing each of the divided bodies 2a, 2b, 4a, 4b, 5a, 5b as one component, the vibration-proof mount 1 is composed of six components, among which three components 2a, 4a, 5a are one component. The bush is integrally vulcanized and molded, and the three parts 2b, 4b and 5b are integrally vulcanized and molded as another bush. The two bushes have the same shape and size.

FIG. 2 shows one of the bushes, FIG. 3 is a view in the X direction in FIG. 2, and FIG. 4 is a view in the Y direction in FIG. As shown in these figures, the opening shape of the mounting hole 22 is oval (FIG. 4) or elliptical (not shown), and the bottom wall portion 6 of the engaging groove 3 of the rigid member 2 on the outer peripheral side is formed. Is provided with a width across flat 7. The dimensional relationship of each part is such that the length of the wide portion of the mounting hole 22 is A, the length of the narrow portion of the mounting hole 22 is B, the diameter (outer diameter) of the bottom wall portion 6 is C, and the width across flats is 7. The width is D, and A> C> B> D. In addition, 8 is a second width across flats for engaging a rotating jig such as a wrench.

As shown in FIG. 4, the vibration-proof bushing 1 having the above-described configuration has a direction in which the width across flats 7 provided on the bottom wall portion 6 of the rigid member 2 on the outer peripheral side matches the narrow portion of the mounting hole 22. The divided bodies 2a, 2b of the outer peripheral rigid member 2 are inserted into the mounting holes 22 from above and below (first step), and then the divided bodies 2a, 2b are rotated by about 90 degrees (second step). ). In the first stage shown in FIG. 4, B and D have the same orientation, A and C have the same orientation, and since B> D and A> C, each division body 2a, 2b is It will be loosely inserted in the mounting hole 22. Next, in the second stage, since C and D rotate approximately 90 degrees from the state of the first stage shown in FIG. 4, B and C have the same orientation, and A and D have the same orientation, and C> In addition to B, A> D and especially C 2> B, so that each divided body 2a, 2b has the outer peripheral surface of the bottom wall portion 6 on the inner peripheral surface of the inner peripheral edge portion 23 of the mounting hole 22. It will be fitted from. Therefore, by this fitting, it is possible to effectively prevent rattling of the bracket 21 and the vibration isolation mount 1 in the radial direction, and it is possible to prevent noise and the like due to this rattling.

[0011]

[Effect of the device]

 The present invention has the following effects. That is, the opening shape of the mounting hole of the bracket is elliptical or elliptical, and the width of the flat surface of the engaging groove of the rigid member on the outer peripheral side is two-sided. The length is A, the length of the narrow part of the mounting hole is B, the diameter of the bottom wall is C, and the width of the width across flats is D, so that A> C> B> D. By inserting the divided body of the side rigid member into the mounting hole and then rotating the divided body by approximately 90 degrees, the divided body can be fitted into the inner peripheral edge portion of the mounting hole from the inner peripheral side. Therefore, by this fitting, it is possible to effectively prevent rattling of the bracket and the vibration isolation mount in the radial direction, and it is possible to prevent noise and the like due to this rattling.

[Brief description of drawings]

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

[Fig. 2] Cross-sectional view of the bush alone

FIG. 3 is an X-direction arrow view in FIG.

FIG. 4 is a view in the Y direction of FIG.

FIG. 5 is an explanatory diagram showing a usage state of a vibration proof mount.

FIG. 6 is a sectional view of an anti-vibration mount according to a conventional example.

FIG. 7 is a partial plan view of a bracket according to a conventional example.

[Explanation of symbols]

 1 Anti-Vibration Mount 2 Rigid Member 2a, 2b, 4a, 4b, 5a, 5b on the Outer Side Side Divided Body 3 Engaging Groove 4 Elastic Body 5 Rigid Member on the Inner Side 6 Bottom Wall 7 Dihedral Width 8 Second Two Face width 11 Center bearing support 21 Bracket 22 Mounting hole 23 Inner peripheral edge

Claims (1)

[Scope of utility model registration request] 1. An anti-vibration mount 1 mounted on an inner peripheral edge portion 23 of a mounting hole 22 formed in a bracket 21 and having an annular shape, the outer peripheral surface of which is engaged with the inner peripheral edge portion 23. Of the outer peripheral side rigid member 2 divided into two divided bodies 2a and 2b so as to sandwich the inner peripheral edge portion 23, and connected to the inner peripheral side of the outer peripheral side rigid member 2. In an anti-vibration mount including an elastic body 4 made of a rubber-like elastic material and an inner peripheral side rigid member 5 connected to the inner peripheral side of the elastic body 4, the opening shape of the mounting hole 22 is an oval or The width of the mounting hole 22 is A, the width of the wide portion of the mounting hole 22 is A, and the width of the mounting hole 22 is narrow. Let B be the length, C be the diameter of the bottom wall portion 6, and D be the width of the width across flats 7, and A>C>B> D. Anti-vibration mounts and butterflies.