Dust cover receiving structure of hydraulic shock absorber

• US 20030209395A1
• Filed: 03/03/2003
• Published: 11/13/2003
• Est. Priority Date: 05/08/2002
• Status: Active Grant

• Current Assignee: Showa Corporation (Hitachi, Ltd.)
• Original Assignee: Showa Corporation (Hitachi, Ltd.)
• Inventors: Fukaya, Yukio
• Granted Patent: US 6,883,651 B2
• Time in Patent Office: Days
• US Class Current: 188/322.12
• CPC Class Codes: B60G 11/14 having helical, spiral or coil springs only B60G11/006 takes precedence
• CPC Class Codes: B60G 13/003 characterised by the mounting on the vehicle body or chassis of the damper unit
• CPC Class Codes: B60G 15/063 characterised by the mounting of the spring on the damper B60G15/065, B60G15/066 take precedence
• CPC Class Codes: B60G 15/068 specially adapted for MacPherson strut-type suspension
• CPC Class Codes: B60G 2202/12 Wound spring
• CPC Class Codes: B60G 2202/312 The spring being a wound spring
• CPC Class Codes: B60G 2204/1242 on a damper, e.g. MacPerson strut
• CPC Class Codes: B60G 2204/12422 anchoring the end coils on the spring support plate
• CPC Class Codes: B60G 2204/45021 for limiting upper mount movement of a McPherson strut
• CPC Class Codes: F16F 1/126 comprising an element between the end coil of the spring and the support proper, e.g. an elastomeric annulus F16F1/13 takes precedence
• CPC Class Codes: F16F 9/38 Covers for protection or appearance

Abstract

A dust cover receiving structure of a hydraulic shock absorber in which a sheet rubber is interposed between a suspension spring and a spring sheet. The sheet rubber has a spring receiving portion which is arranged and clamped between the suspension spring and the spring sheet, a centering portion which is fitted to a damper tube and guides an end portion of a dust cover in such a manner as to align the dust cover with an axial center of the damper tube, and a cover receiving portion which is provided between the spring receiving portion and the centering portion, and which receives an end surface of the dust cover.

Claims

1. A dust cover receiving structure of a hydraulic shock absorber, comprising:

a dust cover having one end portion fixed to a side of a piston rod, the dust cover being put on a damper tube;

a suspension spring provided at an outer side of the dust cover and which is supported to a spring sheet mounted to the damper tube; and

a sheet rubber interposed between the suspension spring and the spring sheet,

wherein the sheet rubber has a spring receiving portion which is arranged and clamped between the suspension spring and the spring sheet, a centering portion which is fitted to the damper tube and which guides another end portion of the dust cover so as to align the dust cover with an axial center of the damper tube, and a cover receiving portion which is provided between the spring receiving portion and the centering portion and which receives an end surface of the dust cover at said another end portion of the dust cover.

2. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 1, wherein the centering portion is provided with a taper portion which is contracted so as to be close to an outer periphery of the damper tube toward a leading end side of the centering portion.

3. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 1, wherein the cover receiving portion is formed in a flat shape.

4. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 2, wherein the cover receiving portion is formed in a flat shape.

5. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 1, wherein notch portions are provided in the centering portion and the cover receiving portion.

6. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 2, wherein notch portions are provided in the centering portion and the cover receiving portion.

7. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 3, wherein notch portions are provided in the centering portion and the cover receiving portion.

8. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 4, wherein notch portions are provided in the centering portion and the cover receiving portion.

9. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 1, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

10. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 2, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

11. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 3, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

12. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 4, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

13. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 5, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

14. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 6, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

15. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 7, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

16. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 8, wherein the spring receiving portion is arranged to keep an inner diameter of the suspension spring under restraint.

17. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 1, wherein said another end portion of the dust cover has a circular ring protruding groove portion which is outwardly bulged in a C shape in cross section.

18. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 1, wherein at least one water discharge drain is formed at a position along a periphery of the spring receiving portion.

19. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 18, wherein said at least one water discharge drain comprises a notch formed at a position of the periphery of the spring receiving portion to drain away water from an inner peripheral side of the terminal end of the suspension spring.

20. A dust cover receiving structure of a hydraulic shock absorber as claimed in claim 18, wherein said at least one water discharge drain comprises a plurality of said notches spaced apart along a whole periphery of the spring receiving portion.