Suspension

Patent metadata

Field	Value
Publication number	US-11098780-B2
Application number	US-201916521103-A
Country	US
Kind code	B2
Filing date	Jul 24, 2019
Priority date	Mar 7, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A suspension includes: a cylinder; a piston rod including a piston provided at one end-side, and inserted in the cylinder together with the piston; an outer tube part opened at the one end-side, a position of which relative to the piston rod is fixed at the other end-side, and configured to receive therein at least a part of the cylinder; and a tubular rolling diaphragm having one end disposed at the cylinder and the other end fixed to the outer tube part, and configured to roll in conjunction with displacement of the piston rod with respect to the cylinder. The rolling diaphragm becomes convex toward the other end-side of the outer tube part and is accommodated in the outer tube part, upon contraction of the suspension.

First claim

What is claimed is:

1. A suspension comprising:
a cylinder;
a piston rod including a piston provided at one end-side, and inserted in the cylinder together with the piston;
an outer tube part opened at the one end-side, a position of which relative to the piston rod is fixed at the other end-side, and configured to receive therein at least a part of the cylinder; and
a tubular rolling diaphragm having one end disposed at the cylinder and the other end fixed to the outer tube part, and configured to roll in conjunction with displacement of the piston rod with respect to the cylinder; and
a diaphragm having one end fixed to the cylinder and the other end fixed to the other end-side of the suspension, and configured to form an air chamber around at least the piston rod,
wherein the rolling diaphragm becomes convex toward the other end-side of the outer tube part and is accommodated in the outer tube part, upon contraction of the suspension, and
wherein the diaphragm is disposed in the outer tube part.

2. The suspension according to claim 1 ,
wherein the rolling diaphragm includes a material with heat dissipation.

3. The suspension according to claim 2 ,
wherein the one end of the rolling diaphragm is disposed to be displaceable with respect to the cylinder.

4. The suspension according to claim 2 ,
wherein a pressure in a space surrounded by the outer tube part, the rolling diaphragm, the diaphragm and the cylinder is a negative pressure.

5. The suspension according to claim 2 ,
wherein a heat transfer fluid is injected in a space between the rolling diaphragm and the diaphragm.

6. The suspension according to claim 1 ,
wherein a heat transfer fluid is injected in a space between the rolling diaphragm and the diaphragm.

7. The suspension according to claim 1 ,
wherein a pressure in a space surrounded by the outer tube part, the rolling diaphragm, the diaphragm and the cylinder is a negative pressure.

8. The suspension according to claim 1 ,
wherein operating oil is filled in the cylinder, and the suspension further comprises: a damping force generation device configured to generate a damping force with flow of the operating oil.

9. The suspension according to claim 8 , further comprising:
a sub-tank configured to compensate for the operating oil equivalent to an amount of change in volume of the cylinder, which is caused in conjunction with displacement of the piston rod with respect to the cylinder.

10. The suspension according to claim 1 ,
wherein the one end of the rolling diaphragm is disposed to be displaceable with respect to the cylinder.

11. A suspension comprising:
a cylinder;
a piston rod including a piston provided at one end-side, and inserted in the cylinder together with the piston;
an outer tube part opened at the one end-side, a position of which relative to the piston rod is fixed at the other end-side, and configured to receive therein at least a part of the cylinder; and
a tubular rolling diaphragm having one end disposed at the cylinder and the other end fixed to the outer tube part, and configured to roll in conjunction with displacement of the piston rod with respect to the cylinder,
wherein the rolling diaphragm becomes convex toward the other end-side of the outer tube part and is accommodated in the outer tube part, upon contraction of the suspension, and
wherein the one end of the rolling diaphragm is disposed to be displaceable with respect to the cylinder.

12. A suspension comprising:
a cylinder;
a piston rod including a piston provided at one end-side, and inserted in the cylinder together with the piston;
an outer tube part opened at the one end-side, a position of which relative to the piston rod is fixed at the other end-side, and configured to receive therein at least a part of the cylinder; and
a tubular rolling diaphragm having one end disposed at the cylinder and the other end fixed to the outer tube part, and configured to roll in conjunction with displacement of the piston rod with respect to the cylinder,
wherein the rolling diaphragm becomes convex toward the other end-side of the outer tube part and is accommodated in the outer tube part, upon contraction of the suspension,
wherein the rolling diaphragm includes a material with heat dissipation, and
wherein the one end of the rolling diaphragm is disposed to be displaceable with respect to the cylinder.

Assignees

• Showa Corp

Inventors

• Tanaka Katsushi
• Yoshida Kojiro

Classifications

• B60G15/14 Primary

  the damper being connected to the stub axle and the spring being arranged around the damper · CPC title

• F16F9/49

  Stops limiting fluid passage, e.g. hydraulic stops {or elastomeric elements inside the cylinder which contribute to changes in fluid damping (fluid-actuated displacement devices with means for accelerating or decelerating the stroke F15B15/22)} · CPC title

• B60G2204/4308

  Protecting guards, e.g. for rigid axle damage protection · CPC title

• F16F9/38

  Covers for protection or appearance · 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