Laundry treating appliance suspension system

Patent metadata

Field	Value
Publication number	US-9340916-B2
Application number	US-89450310-A
Country	US
Kind code	B2
Filing date	Sep 30, 2010
Priority date	Apr 13, 2010
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A suspension system for a laundry treating appliance having a cabinet and a tub comprises a rod coupled to the cabinet and a shock absorber coupled between the rod and the tub. A socket interface on the rod reduces side loading forces on the shock absorber. The socket interface may be separate from the shock absorber.

First claim

What is claimed is:

1. A laundry treating appliance, comprising:
a cabinet defining an interior;
a tub located within the cabinet and having at least one socket;
a suspension system coupling the tub to the cabinet and comprising at least one suspension strut assembly comprising:
an elongated rod defining a longitudinal axis and extending between the tub and cabinet, with one end of the rod mounted to the cabinet and another end of the rod passing through the socket, and the longitudinal axis oriented at an angle relative to vertical;
a shock absorber, comprising:
a damper having a compressible portion located within a housing and wherein the damper is slidably mounted on the rod;
a spring having one end operably coupled to the rod and another end operably coupled to the damper; and
an end cap adjacent the damper and wherein the end cap forms an end of the shock absorber and the damper is located between the end cap and the spring; and

a socket interface moveably mounted on the rod and having one end with a first surface abutting a second surface of the socket, another end opposite the first surface and having a third surface abutting the end cap of the shock absorber, and a body of the socket interface converging from the first surface to the third surface, which has a smaller area than the first surface, and wherein during operation forces imparted by the socket onto the socket interface along an axis unaligned with the longitudinal axis of the elongated rod are aligned by the socket interface to be with the longitudinal axis of the rod.

2. The laundry treating appliance of claim 1 wherein the first and second surfaces are complementary.

3. The laundry treating appliance of claim 2 wherein the first and second surfaces have substantially the same radius of curvature.

4. The laundry treating appliance of claim 1 wherein the unaligned forces acting on the first surface emanate through the third surface aligned with the longitudinal axis.

5. The laundry treating appliance of claim 1 wherein the damper comprises a compressible dampening insert surrounding the rod.

6. The laundry treating appliance of claim 1 wherein the spring is a coil spring.

7. The laundry treating appliance of claim 1 wherein the shock absorber further comprises another end cap spaced from the damper.

8. A suspension strut assembly for suspending a tub of a washing machine, where the tub includes a socket, to a chassis of the washing machine, comprising:
an elongated rod defining a longitudinal axis, with one end configured to mount to the chassis and an opposite end;
a shock absorber, comprising:
a damper having a compressible portion that is slidably mounted on the rod;
a spring having one end operably coupled to the rod and another end operably coupled to the damper; and
an end cap adjacent the damper and wherein the end cap forms an end of the shock absorber and the damper is located between the end cap and the spring; and

a socket interface moveably mounted on the rod and having a body with one end having a first surface area configured to abut the socket of the tub and another end that is opposite the first end and includes a second surface area that is configured to abut the end cap of the shock absorber, and wherein the second surface area is smaller than the first surface area and the body of the socket interface converges towards the second surface area and wherein forces imparted by the socket of tub along an axis unaligned with the longitudinal axis of the elongated rod are aligned by the body of the socket interface to be with the longitudinal axis of the rod.

9. The suspension strut assembly of claim 8 wherein the first surface is shaped to direct forces acting on the first surface axially along the longitudinal axis.

10. The suspension strut assembly of claim 9 wherein the socket interface comprises a second surface, opposite the first surface, with the second surface contacting the shock absorber, and the unaligned forces acting on the first surface emanate through the second surface aligned with the longitudinal axis.

11. The suspension strut assembly of claim 10 wherein the first surface has a radius of curvature.

12. The suspension strut assembly of claim 8 wherein the compressible portion of the damper comprises a compressible friction member surrounding the rod.

13. The suspension strut assembly of claim 12 wherein the spring is a coil spring.

14. The laundry treating appliance of claim 7 wherein the shock absorber further comprises a piston spaced from the damper and adjacent the another end cap.

Assignees

• Miller Christoph J
• Patera John L
• Whirlpool Co

Inventors

• Miller Christoph J
• Patera John L

Classifications

• D06F37/12

  adapted for rotation or oscillation about a vertical axis · CPC title

• D06F37/20 Primary

  Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations · CPC title

• D06F37/268 Primary

  for suspension devices · CPC title

• D06F37/24

  in machines with a receptacle rotating or oscillating about a vertical axis · CPC title