Strut bearing and vehicle strut suspension

Patent metadata

Field	Value
Publication number	US-12427819-B2
Application number	US-202218836729-A
Country	US
Kind code	B2
Filing date	Feb 18, 2022
Priority date	Feb 18, 2022
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A strut bearing includes an upper case, a lower case, an upper raceway ring held by the upper case, a lower raceway ring held by the lower case, and rolling elements that roll in a space between the upper raceway ring and the lower raceway ring. The upper case has an upper surface on which an annular recess is provided, and the annular recess contains an elastic member fitted thereinto. The elastic member includes a base in the recess and a protrusion protruding from the upper surface of the upper case.

First claim

The invention claimed is:

1. A strut bearing comprising:
an upper case;
a lower case;
an upper raceway ring held by the upper case;
a lower raceway ring held by the lower case; and

rolling elements that roll in a space between the upper raceway ring and the lower raceway ring, wherein
the upper case has an upper surface on which an annular recess is provided,
the annular recess contains an elastic member fitted thereinto,
the elastic member includes:
a base inside the recess; and
a protrusion protruding from the upper surface of the upper case,

the upper surface of the upper case includes an annular flat portion located in a radially inside of the recess and an annular flat portion located in a radially outside of the recess, and
when a compressive force in an axial direction is applied to the strut bearing to compress the protrusion of the elastic member by a protrusion size of the protrusion, a lower surface of an upper support of the strut suspension comes into contact with the annular flat portions in the radially inside and outside of the recess in the upper surface of the upper case.

2. The strut bearing according to claim 1 , wherein the protrusion protrudes from the upper surface of the upper case by a size of 0.05 mm≤D≤0.20 mm.

3. The strut bearing according to claim 1 , wherein
the upper case is made of a thermoplastic resin, and
the elastic member is made of a thermoplastic elastomer.

4. A vehicle strut suspension comprising
the strut bearing according to claim 1 .

Assignees

• Jtekt Corp
• Nakanishi Metal Works Co

Inventors

• Yano Hiroshi
• Maeda Ikuhisa
• Narazaki Yasuhiro
• Horikawa Yoshio
• Fukada Shogo

Classifications

• B60G2204/418

  Bearings, e.g. ball or roller bearings · CPC title

• B60G17/021

  the mechanical spring being a coil spring (B60G17/0272 takes precedence) · CPC title

• B60G2204/128

  Damper mount on vehicle body or chassis · CPC title

• F16C27/06

  by means of parts of rubber or like materials (F16C27/08 takes precedence; with sliding surfaces of rubber or synthetic rubber F16C33/22) · CPC title

• F16C19/12

  for supporting the end face of a shaft or other member, e.g. footstep bearings · CPC title