Damper for vehicles

• US 6,439,359 B1
• Filed: 05/02/2000
• Issued: 08/27/2002
• Est. Priority Date: 09/02/1998
• Status: Expired due to Term

• Current Assignee: Sumitomo Riko Company Limited.
• Original Assignee: Tokai Rubber Industries Limited
• Inventors: Ikaga, Syuji, Hattori, Shigemitsu, Hamada, Masaaki, Kato, Rentaro, Maeno, Hajime, Yasumoto, Yoshinori
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): KRAMER, DEVON C
• Application Number:
  US09/529,424
• Time in Patent Office: 847 Days
• Field of Search: 188/378, 188/379, 188/380, 267/292, 267/293, 267/294, 267/139, 267/140, 267/140.11, 267/140.12, 267/140.13, 267/140.4, 267/140.5, 267/141, 267/141.1, 267/141.2
• US Class Current: 188/379
• CPC Class Codes: B60G 13/16 having dynamic absorbers as main damping means, i.e. spring-mass system vibrating out of phase
• CPC Class Codes: B60G 2202/25 Dynamic damper
• CPC Class Codes: B60G 2206/11 the arm being a radius or track or torque or steering rod or stabiliser end link
• CPC Class Codes: F16F 15/02 Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems F16F15/005 takes precedence ; layered products B32B; suppression of vibration in ships B63; relieving load on bearings, using magnetic means F16C39/06
• CPC Class Codes: F16F 7/08 with friction surfaces rectilinearly movable along each other F16F7/01 takes precedence ; one of the members being a spring F16F13/02
• CPC Class Codes: F16F 7/10 using inertia effect F16F13/108, F16F13/22, F16F15/10, F16F15/22 take precedence; stabilising vehicle bodies by means of movable masses B62D37/04; protection of buildings against vibrations or shocks by mass dampers E04H9/0215; arrangements or devices for damping mechanical oscillations of power lines H02G7/14

Abstract

A vibration restraining apparatus for vehicle of the present invention is comprised of a housing formed by a rigid material and having an inner space, and fixed to a vibration transmitting member; a filled member sealed in the inner space of said housing in a non-adhered state with leaving a gap with respect to a vibrating direction of said housing, and formed by an elastic body at least at a surface thereof. When the housing resonates by vibration transmitted from the vibration transmitting member, the filled member contacts inner surface parts located at both sides of the housing in a vibrating direction thereof to exercise a damping character due to an energy loss caused by a sliding friction and a collision. Thus, a large damping character occurs inside of the housing to reduce vibration of the housing effectively. As a result, vibration of the vibration transmitting member is effectively reduced. The vibration restraining apparatus for vehicle of the present invention can be lightened in weight, does not have a temperature dependency, and can exercise the vibration restraining effect for plural resonances having different frequencies.

Claims

1. A vibration preventing apparatus for vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprising an elastic body at at least a surface thereof, wherein said housing is constructed by said vibration transmitting member in which the inner space is formed.

2. A vibration preventing apparatus for a vehicle according to claim 1, wherein said housing comprises a rigid material having an elasticity rate 5×

10⁴ MPA.

3. A vibration preventing apparatus for a vehicle according to claim 1, wherein said housing is formed integrally with said vibration transmitting member.

4. A vibration preventing apparatus for a vehicle as claimed in claim 3, wherein said filled member comprises an elastic member and wherein an assist mass is positioned within said elastic member.

5. A vibration preventing apparatus for a vehicle as claimed in claim 4, wherein said assist mass comprises a substantially rigid material.

6. A vibration preventing apparatus for a vehicle as claimed in claim 4, wherein said vibrating transmission member comprises a mount for being mounted on a movable member.

7. A vibration preventing apparatus for a vehicle as claimed in claim 6, wherein said movable member comprises a vehicle and said mount comprises an engine mount.

8. A vibration preventing apparatus for a vehicle as claimed in claim 4, wherein said filled member is movable within the housing for contacting opposite interior wall portions of said housing.

9. A vibration preventing apparatus for a vehicle according to claim 1, said housing includes a bracket for being fixed to the vibration transmitting member.

10. A vibration preventing apparatus for a vehicle according to claim 1, wherein said filled member has hardness less than a Shore D hardness value of 80 at a surface portion thereof.

11. A vibration preventing apparatus for a vehicle according to claim 1, wherein the elastic body forming at least the surface part of said filler member comprises a high specific gravity rubber body having a density of more than 1.5 g/cm³.

12. A vibration preventing apparatus for a vehicle according to claim 1, wherein the gap formed between said housing and said filled member has a minimum gap rate of less than 30%.

13. A vibration preventing apparatus for a vehicle according to claim 1, wherein the gap formed between said housing and said filled member has a length dimension of 0.1 to 0.5 mm.

14. A vibration preventing apparatus for a vehicle as claimed in claim 1, wherein said vibrating transmission member comprises a mount for being mounted on a movable member.

15. A vibration preventing apparatus for a vehicle as claimed in claim 14, wherein said movable member comprises a vehicle and said mount comprises an engine mount.

16. A vibration preventing apparatus for a vehicle as claimed in claim 14, wherein said filled member is movable within said housing for contacting opposite interior wall portions of said housing.

17. A vibration preventing apparatus for a vehicle as claimed in claim 1, wherein said filled member is movable within said housing for contacting opposite interior wall portions of said housing.

18. A vibration preventing apparatus for a vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprising an elastic member with an elastic body at at least a surface thereof wherein an assist mass is positioned within said elastic member.

19. A vibration preventing apparatus for a vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprising an elastic member with an elastic body at at least at a surface thereof and an assist mass positioned within said elastic member wherein said assist mass comprises a substantially rigid material.

20. A vibration preventing apparatus for a vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprising an elastic member with an elastic body at at least a surface thereof and an assist mass positioned within said elastic member wherein said vibrating transmission member comprises a mount for being mounted on a movable member.

21. A vibration preventing apparatus for a vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprising an elastic member with elastic body at at least a surface thereof and an assist mass positioned within said elastic member;

said vibrating transmission member comprising a mount for being mounted on a movable member, said movable member comprising the vehicle and said mount comprising an engine mount.

22. A vibration preventing apparatus for a vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprising an elastic member with an elastic body at at least a surface thereof and an assist mass positioned within said elastic member wherein said filled member is movable within the housing for contacting opposite interior wall portions of said housing.

23. A vibration preventing apparatus for vehicle having a vibration transmitting member, comprising:

a housing formed by a rigid material and having an inner space, said housing being fixable to the vibration transmitting member;

a filled member sealed in the inner space of said housing in a non-adhered state so as to form a gap with respect to a vibrating direction of said housing, said filled member comprises an elastic member with an elastic body at at least a surface thereof, wherein the gap formed between said housing and said filled member has a length dimension of 0.1 to 0.5 mm, and wherein an assist mass is positioned within said elastic member.