Damper device

Patent metadata

Field	Value
Publication number	US-11415221-B2
Application number	US-201816496988-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Mar 30, 2017
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A damper device includes a cylinder including an attachment portion and a piston including an attachment portion. The attachment portion of at least one of the cylinder and the piston includes an elastic portion which urges a pin member inserted therein in an axial direction and a radial direction. The elastic portion includes an axial abutment portion which abuts on a large-diameter portion of the pin member protruding radially outward from an outer peripheral surface of the pin member; and a radial abutment portion which abuts on the outer peripheral surface of the pin member.

First claim

The invention claimed is:

1. A damper device which applies a damping force to an action of opening and closing an opening and closing body provided to a fixed body, the damper device comprising:
a cylinder; and
a piston which is capable of advancing and retracting in the cylinder,
wherein the cylinder includes an attachment portion which is pivotally supported on a pin member provided to one of a fixed body and an opening and closing body, and the attachment portion includes an opening portion which penetrates in a direction substantially orthogonal to an advancing and retracting direction of the piston,
wherein the piston includes an attachment portion which is pivotally supported on a pin member provided to another of the fixed body or the opening and closing body, and the attachment portion includes an opening portion which penetrates in the direction substantially orthogonal to the advancing and retracting direction of the piston,
wherein the attachment portion of at least one of the cylinder and the piston includes an elastic portion which urges the inserted pin member in an axial direction and a radial direction,
wherein the elastic portion includes
a first extension portion which extends in the radial direction;
a second extension portion which is bent from one end of the first extension portion and extends in a direction intersection the radial direction;
an axial abutment portion which abuts on a large-diameter portion of the pin member protruding radially outward from an outer peripheral surface of the pin member; and
a radial abutment portion which abuts on the outer peripheral surface of the pin member, and

wherein the elastic portion urges the pin member in the axial direction by axially displacing one end of the first extension portion.

2. The damper device according to claim 1 ,
wherein the second extension portion includes the axial abutment portion and the radial abutment portion.

3. The damper device according to claim 2 ,
wherein in a state where the pin member is attached, the second extension portion fits between a pair of large-diameter portions of the pin member, both ends thereof respectively abut on the pair of large-diameter portions, and the elastic portion urges the pin member in the axial direction by axially displacing the one end of the first extension portion.

4. The damper device according to claim 2 ,
wherein the first extension portion extends from one end of the second extension portion abutting on one of the large-diameter portions of the pin member, and a gap is provided between the one of the large-diameter portions of the pin member and the first extension portion.

5. The damper device according to claim 2 ,
wherein the elastic portion includes a third extension portion extending in a direction intersecting with the radial direction by being bent from another end of the first extension portion and facing the second extension portion.

Assignees

• Piolax Inc

Inventors

• Kato Kouichi

Classifications

• F16J1/18 Primary

  Securing of gudgeon-pins · CPC title

• F16F9/54

  Arrangements for attachment {(grommet-type rubber mounting springs per se F16F1/3732; construction of cylinder ends F16F9/3242; attachments to vehicles B60G13/001, B60G15/00)} · CPC title

• F16B2/22

  of resilient material, e.g. rubbery material {(F16B2/205 takes precedence)} · CPC title