US 2026/0077807 A1 · ANTI-RATTLE DEVICE AND ELECTRIC POWER STEERING SYSTEM INCLUDING SAME

Abstract

An anti-rattle device includes: a plug fitted into a plug aperture formed in a housing accommodating a worm shaft and a worm wheel meshing with the worm shaft; a bearing damper configured to surround a worm shaft bearing, rotatably supporting the worm shaft, and installed inside the housing, wherein when absorbing moisture, the bearing damper expands and presses the worm shaft bearing so that the worm shaft bearing moves away from the worm wheel; a push rod interposed between the plug and the worm shaft bearing and configured to extend to penetrate the bearing damper; and a spring configured to elastically press the push rod so that the push rod elastically comes into close contact with the worm shaft bearing.

Claims12

Dependent claims

An anti-rattle device comprising:

a plug positioned within a plug aperture extending at least partially through a housing accommodating a worm shaft and a worm wheel that meshes with the worm shaft;
a bearing damper positioned within the housing and at least partially surrounding a worm shaft bearing that rotatably supports the worm shaft, the bearing damper configured to expand from a resting state to an expanded state in response to absorbing moisture and displace the worm shaft bearing away from the worm wheel;
a push rod positioned between the plug and the worm shaft bearing and extending through a push rod through-hole in the bearing damper;
and
a biasing element biasing the push rod toward the worm shaft bearing.

2 more elements

An electric power steering system comprising:

an electric motor;
a worm shaft rotating by rotational power of the electric motor;
a worm shaft bearing, rotatably supporting the worm shaft;
a worm wheel meshing with the worm shaft;
a housing accommodating the worm shaft, the worm shaft bearing, and the worm wheel;
and
an anti-rattle device comprising:
a plug positioned within a plug aperture extending at least partially through the housing;
a bearing damper positioned within the housing and at least partially surrounding the worm shaft bearing, wherein the bearing damper is configured to expand from a resting state to an expanded state in response to absorbing moisture and displace the worm shaft bearing away from the worm wheel;
a push rod positioned between the plug and the worm shaft bearing and extending through a push rod through-hole in the bearing damper;
and
a biasing element biasing the push rod toward the worm shaft bearing.

9 more elements

Dependencies are inferred from the claim text.

Anti-rattle device and electric power steering system including same

Life of this patent

Anti-rattle device and electric power steering system including same

Life of this patent

Abstract

Claims12