Friction damper

Patent metadata

Field	Value
Publication number	US-9488240-B2
Application number	US-88298007-A
Country	US
Kind code	B2
Filing date	Aug 8, 2007
Priority date	Jan 16, 2002
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A friction damper includes a base body; a support secured to an elongated member of the base body and having a through hole; a rod which extends in such a manner as to pass through the through hole of the support and is movable in an axial direction with respect to the support; a friction member which has a hollow cylindrical portion interposed between the support and a main body portion of the rod in the through hole of the support, and which is fixed immovably with respect to the relative movement of the rod in the axial direction with respect to the base body; and a tightening structure provided for the support so as to tighten the hollow cylindrical portion of the friction member onto the main body portion of the rod.

First claim

The invention claimed is:

1. A friction damper comprising:
a base body adapted to be capable of being attached to one of a pair of members which are displaced relative to each other;
first and second supports each disposed within and secured to said base body and having an inner circular surface defining a circular through hole, said first and second supports being mutually adjacent in an axial direction, said first support having only one first slit communicating with the circular through hole of said first support so as to be reducible in diameter;
a cylindrical rod which extends through the circular through holes of said first and second supports and has an outer circular surface, is movable in the axial direction with respect to said first and second supports, and is adapted to be capable of being attached to another one of the pair of members;
a friction member which has a hollow cylindrical portion interposed between the inner circular surface of said first support and the outer circular surface of said rod, and only one collar united with said hollow cylindrical portion, said first and second supports between which said collar is disposed, clamping said collar without clearances between the first support and the collar, and between the second support and the collar, respectively so as to fix said friction member immovably with respect to the relative movement of the rod in the axial direction with respect to said base body;
at least one deformable member interposed between said inner circular surface of said first support and an outer peripheral circular surface of said hollow cylindrical portion of said friction member to uniformly bring the hollow cylindrical portion of the friction member into contact with the rod by virtue of its deformability in the tightening of the hollow cylindrical portion of the friction member against the rod; and
a tightening mechanism structured and positioned to reduce a width of the first slit of said first support to thereby tighten the hollow cylindrical portion of the friction member.

2. The friction damper according to claim 1 , wherein said hollow cylindrical portion of said friction member has a second slit extending from one end face to another end face thereof in the axial direction so as to be reducible in diameter.

3. The friction damper according to claim 1 , wherein said hollow cylindrical portion of said friction member is formed into two-split members so as to be reducible in diameter.

4. The friction damper according to claim 1 , wherein said deformable member is formed into two-split members so as to be reducible in diameter.

5. The friction damper according to claim 1 , wherein a plurality of deformable members are superposed one on top of another, and are interposed between said first support and said hollow cylindrical portion of said friction member.

6. A friction damper comprising:
a base body adapted to be capable of being attached to one of a pair of members which are displaced relative to each other;
first and second supports each disposed within and secured to said base body, having an inner circular surface defining a circular through hole, and formed into two-split members so as to be reducible in diameter, said first and second supports being mutually adjacent in an axial direction;
a cylindrical rod which extends through the circular through holes of said first and second supports and has an outer circular surface, is movable in the axial direction with respect to said first and second supports, and is adapted to be capable of being attached to another one of the pair of members;
a friction member which has a hollow cylindrical portion interposed between the inner circular surface of said first support and the outer circular surface of said rod, and is fixed immovably with respect to the relative movement of the rod in the axial direction with respect to said base body, said hollow cylindrical portion of said friction member, being formed into two-split members so as to be reducible in diameter;
at least one deformable member interposed between said inner circular surface of said first support and an outer peripheral circular surface of said hollow cylindrical portion of said friction member to uniformly bring the hollow cylindrical portion of the friction member into contact with the rod by virtue of its deformability in the tightening of the hollow cylindrical portion of the friction member against the rod; and
a tightening mechanism structured and positioned to reduce a width of a gap between said two-split members of said first support to thereby tighten the hollow cylindrical portion of the friction member,
said friction member having only one collar united with an axial end of said hollow cylindrical portion, said first and second supports between which said collar is disposed, clamping said collar without clearances between the first support and the collar, and between the second support and the collar, respectively so as to fix said friction member immovably with respect to the relative movement of said rod in the axial direction with respect to said base body.

7. The friction damper according to claim 6 , wherein said deformable member is formed into two-split members so as to be reducible in diameter.

Assignees

• Okimura Akihiko
• Nagashima Kazuhiro
• Tanaka Go
• Arai Yoshikazu
• Oiles Industry Co Ltd

Inventors

• Okimura Akihiko
• Nagashima Kazuhiro
• Tanaka Go
• Arai Yoshikazu

Classifications

• F16F7/09

  in dampers of the cylinder-and-piston type · CPC title

• F16F15/02 Primary

  Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) · CPC title

• E04H9/0237 Primary

  Structural braces with damping devices · CPC title

• F16F7/082

  and characterised by damping force adjustment means · CPC title

• F16F7/08 Primary

  with friction surfaces rectilinearly movable along each other (F16F7/01 takes precedence {; one of the members being a spring F16F13/02}) · CPC title