# US 4,319,768 A · Vehicle suspension strut

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- Number: US 4,319,768 A
- Document ID: US4319768A
- Status: Granted
- Kind: A
- Application number: 06/137,051
- Filed: 1980-04-03
- Granted: 1982-03-16
- Earliest claimed: 1980-04-03
- Assignees: Chrysler Corporation
- Inventors: Ralph A. Youngdale
- Web page: https://patentgrep.com/patent/US4319768A

## CPC

- B60G 15/068: {specially adapted for MacPherson strut-type suspension}
- B60G 2200/46: camber angle
- B60G 2202/312: The spring being a wound spring
- B60G 2204/124: Mounting of coil springs
- B60G 2204/1242: on a damper, e.g. MacPerson strut
- B60G 2204/128: Damper mount on vehicle body or chassis
- B60G 2204/41: Elastic mounts, e.g. bushings
- B60G 2204/418: Bearings, e.g. ball or roller bearings
- B60G 2204/43: Fittings, brackets or knuckles
- B60G 2204/44: Centering or positioning means
- B60G 2204/45: Stops limiting travel
- B60G 2204/45021: for limiting upper mount movement of a McPherson strut
- B60G 2204/61: Adjustable during maintenance
- B60G: VEHICLE SUSPENSION ARRANGEMENTS (air-cushion vehicles B60V; {cycle suspensions B62K25/00})

## Abstract

A vehicle suspension strut is provided with an improved bearing assembly consisting of a metallic bearing member which directly supports a portion of the rod member of the strut and a plastic seal member which sealingly engages the bearing member and provides for securely resiliently mounting the bearing assembly in a self centering manner in the structure by which the strut is fixed to the body of the vehicle.

## Claims

### Claim 1

In a vehicle suspension strut of the type including a housing member connected to support means of a vehicle wheel, a rod member extending from the housing member and reciprocably moveable with respect thereto, and mounting means for resiliently connecting a portion of the rod member to the body of the vehicle including a bearing assembly carried on the rod member portion and received in a bearing pocket formed in the resilient mounting means, an improved bearing assembly comprising:
A. a generally hat shaped metallic bearing member having;
1. an inner diametral bearing surface engaging said rod member portion;
2. first and second outer diametral sealing surfaces; and
3. a frusto-conical shoulder surface extending between said first and second outer diametral sealing surfaces; and
B. a generally cylindrical seal member having:
1. an outer mounting diametral portion received in press fit relationship in said bearing pocket; p1 2. first and second inner sealing portions sealingly engaging said first and second bearing member sealing surfaces; and
3. a frusto-conical surface complementary to and abuttingly engaging said bearing member shoulder surface whereby upon imposition of eccentrically directed loads on said rod member self centering of said improved bearing assembly with respect to said vehicle suspension strut is effected.

### Claim 2 (depends on 1)

An improved bearing assembly as defined in claim 1 wherein said bearing frusto-conical shoulder surface and said frusto-conical seal surface define an angle of approximately 78.degree. with the longitudinal axis of said rod.

### Claim 3 (depends on 1, 2)

An improved bearing assembly as defined in claims 1 or 2 wherein said seal member outer diametral portion is formed to define a corrugated surface whereby the amount of press fit employed in inserting said improved bearing assembly into said bearing pocket is increased.

### Claim 4 (depends on 1, 2)

An improved bearing assembly as defined in claims 1, 2, or 3 wherein said seal member first and second sealing portions comprise highly flexible lip members abuttingly engaging said bearing member sealing surfaces with substantially line contact.

### Claim 5

In a vehicle suspension strut of the type including a housing member connected to support means of a vehicle wheel, a rod member extending from the housing member and reciprocably moveable with respect thereto, and mounting means for resiliently connecting a portion of the rod member to the body of the vehicle including a bearing assembly carried on the rod member portion and received in a bearing pocket formed in the resilient mounting means, an improved bearing assembly comprising:
A. a generally hat shaped metallic bearing member having:
1. an inner diametral bearing surface engaging said rod member portion;
2. first and second outer diametral sealing surfaces; and
3. a frusto-conical shoulder surface extending between said first and second outer diametral sealing surfaces; and
B. a generally cylindrical seal member having:
1. an outer mounting diametral portion received in press fit relationship in said bearing pocket;
2. means for sealingly engaging said bearing member; and
3. a frusto-conical surface complementary to and abuttingly engaging said bearing member shoulder surface whereby upon imposition of eccentrically directed loads on said rod member self centering of said improved bearing assembly with respect to said vehicle suspension strut is effected.