Damper

Patent metadata

Field	Value
Publication number	US-10066696-B2
Application number	US-201515305194-A
Country	US
Kind code	B2
Filing date	May 14, 2015
Priority date	May 19, 2014
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A damper includes a cylinder, an annular rod guide, a rod, an annular oil seal, and an annular seal holder. The cylinder internally forms an action chamber. The rod guide is secured to one side opening of the cylinder. The rod is inserted through an inner peripheral side of the rod guide so as to be axially movable. The oil seal is installed to the action chamber side of the rod guide to be slidably in contact with an outer peripheral surface of the rod. The seal holder supports the oil seal from the action chamber side. The rod guide includes a holding portion to hold the seal holder.

First claim

The invention claimed is:

1. A damper comprising:
a cylinder that internally forms an action chamber;
an annular rod guide secured to one side opening of the cylinder;
an annular seat secured to the rod guide on an action chamber side;
a rod inserted through inner peripheral sides of the rod guide and the seat in the cylinder so as to be axially movable;
an annular oil seal installed to the action chamber side of the rod guide to be slidably in contact with an outer peripheral surface of the rod;
an annular seal holder configured to support the oil seal from the action chamber side; and
a rebound cushion installed to an outer periphery of the rod, the rebound cushion bumping against the seat at a most extension, wherein
the rod guide includes a holding portion to hold the seal holder, an annular case is formed in the rod guide on the action chamber side,
the case houses the oil seal and the seal holder, and
the holding portion is a claw projecting out from an inner periphery at an end portion on the action chamber side of the case to a center side of the case,
the seal holder is made of an elastic member, and
the claw projects out from only a part in a circumferential direction of the inner periphery to the center side of the case such that a fluid passage is formed through the claw to communicate a space formed between the annular seat and the seal holder with the action chamber.

2. The damper according to claim 1 , wherein
the claw has a surface on the action chamber side, the surface being tapered so as to incline in a direction opposite from the action chamber to the center side of the case.

3. The damper according to claim 1 , wherein:
the case includes a large-diameter portion on the action chamber side and a small-diameter portion on a side opposite from the action chamber, an inner diameter of the small-diameter portion being smaller than an inner diameter of the large-diameter portion,
the oil seal is inserted into the small-diameter portion,
the seal holder is press-fitted to the large-diameter portion, and
the claws are formed into an arc shape or an annular shape, a diameter of a circle which connects inner peripheral ends of the claws being formed to be smaller than the inner diameter of the large-diameter portion and larger than the inner diameter of the small-diameter portion.

4. The damper according to claim 2 , wherein the claw has a tapered portion, and
the tapered portion is formed at a position of an outer peripheral end of the seal holder in a radial direction of the rod.

Assignees

• Kyb Corp

Inventors

• Takeuchi Hideaki

Classifications

• F16F9/061

  Mono-tubular units · CPC title

• F16F9/36

  Special sealings, including sealings or guides for piston-rods ({F16F9/325, F16F9/3485 take precedence; arrangements for filling via piston rod sealing or guiding means F16F9/432} ; sealing of moving parts in general F16J15/16 - F16J15/56) · CPC title

• F16F9/362 Primary

  Combination of sealing and guide arrangements for piston rods (F16F9/361, F16F9/365 take precedence) · CPC title

• B60G2206/40

  Constructional features of dampers and/or springs · CPC title

• F16F9/526

  Self-adjustment of fluid springs · CPC title