Washing machine appliance with dovetail foam damping assembly

Patent metadata

Field	Value
Publication number	US-11111620-B2
Application number	US-201916404943-A
Country	US
Kind code	B2
Filing date	May 7, 2019
Priority date	May 7, 2019
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A dampening suspension assembly for a washing machine appliance is provided. The washing machine appliance has a cabinet and a tub mounted within the cabinet. The dampening suspension assembly includes a suspension rod extending between the tub and the cabinet. The dampening suspension assembly also includes a foam damper assembly circumferentially surrounding a portion of the suspension rod. The foam damper assembly includes a capsule, a first foam friction element disposed in a first trough of the capsule, and a second foam friction element disposed in a second trough of the capsule radially opposite the first foam friction element. The first foam friction element is compressed between opposing sidewalls of the first trough and is compressed against the suspension rod. The second foam friction element is compressed between opposing sidewalls of the second trough and is compressed against the suspension rod.

First claim

What is claimed is:

1. A dampening suspension assembly for a washing machine appliance, the washing machine appliance having a cabinet and a tub mounted within the cabinet, the dampening suspension assembly comprising:
a suspension rod extending along an axial direction between the tub and the cabinet, the suspension rod defining a radial direction perpendicular to the axial direction and a circumferential direction extending around the axial direction; and
a foam damper assembly circumferentially surrounding a portion of the suspension rod, the foam damper assembly comprising a capsule, the capsule comprising a first capsule portion and a second capsule portion releasably interlocked with the first capsule portion by a dovetail joint, the first capsule portion comprising a male dovetail of the dovetail joint and the second capsule portion comprising a female dovetail of the dovetail joint, the foam damper assembly further comprising a first foam friction element disposed in a first trough defined in the first capsule portion of the capsule, and a second foam friction element disposed in a second trough defined in the second capsule portion of the capsule, the second foam friction element opposite the first foam friction element along the radial direction;
wherein the first foam friction element is compressed between opposing sidewalls of the first trough along the circumferential direction and is compressed against the suspension rod along the radial direction, and wherein the second foam friction element is compressed between opposing sidewalls of the second trough along the circumferential direction and is compressed against the suspension rod along the radial direction.

2. The dampening suspension assembly of claim 1 , wherein the male dovetail is a first male dovetail and the female dovetail is a first female dovetail, further comprising a second male dovetail on the first capsule portion radially opposite the first male dovetail and a second female dovetail on the second capsule portion radially opposite the first female dovetail.

3. The dampening suspension assembly of claim 1 , wherein the foam damper assembly comprises a top portion proximate the cabinet of the washing machine appliance along the axial direction and a bottom portion opposite the top portion and proximate the tub of the washing machine appliance along the axial direction, and wherein male dovetail and the female dovetail are tapered along the axial direction towards the bottom portion of the foam damper assembly.

4. The dampening suspension assembly of claim 1 , wherein the first foam friction element defines a square cross-sectional shape when in an uncompressed state and the second foam friction element defines a square cross-sectional shape when in an uncompressed state.

5. The dampening suspension assembly of claim 4 , wherein a depth of the first trough along the radial direction is less than a side length of the first foam friction element and a depth of the second trough along the radial direction is less than a side length of the second foam friction element.

6. The dampening suspension assembly of claim 4 , wherein a width of the first trough along the circumferential direction is less than a side length of the first foam friction element and a width of the second trough along the circumferential direction is less than a side length of the second foam friction element.

7. The dampening suspension assembly of claim 4 , wherein the square cross-sectional shape of the first foam friction element in the uncompressed state is the same as the square cross-sectional shape of the second foam friction element in the uncompressed state.

8. The dampening suspension assembly of claim 4 , wherein a side length of the square cross-sectional shape of the first foam friction element in the uncompressed state and a side length of the square cross-sectional shape of the second foam friction element in the uncompressed state are each greater than a diameter of the suspension rod.

9. A washing machine appliance, comprising:
a cabinet;
a tub mounted within the cabinet by a dampening suspension assembly, the dampening suspension assembly comprising:
a suspension rod extending along an axial direction between the tub and the cabinet, the suspension rod defining a radial direction perpendicular to the axial direction and a circumferential direction extending around the axial direction; and
a foam damper assembly circumferentially surrounding a portion of the suspension rod, the foam damper assembly comprising a capsule, the capsule comprising a first capsule portion and a second capsule portion releasably interlocked with the first capsule portion by a dovetail joint, the first capsule portion comprising a male dovetail of the dovetail joint and the second capsule portion comprising a female dovetail of the dovetail joint, the foam damper assembly further comprising a first foam friction element disposed in a first trough defined in the first capsule portion of the capsule, and a second foam friction element disposed in a second trough defined in the second capsule portion of the capsule, the second foam friction element opposite the first foam friction element along the radial direction;
wherein the first foam friction element is compressed between opposing sidewalls of the first trough along the circumferential direction and is compressed against the suspension rod along the radial direction, and wherein the second foam friction element is compressed between opposing sidewalls of the second trough along the circumferential direction and is compressed against the suspension rod along the radial direction.

10. The washing machine appliance of claim 9 , wherein the male dovetail is a first male dovetail and the female dovetail is a first female dovetail, further comprising a second male dovetail on the first capsule portion radially opposite the first male dovetail and a second female dovetail on the second capsule portion radially opposite the first female dovetail.

11. The washing machine appliance of claim 9 , wherein the foam damper assembly comprises a top portion proximate the cabinet of the washing machine appliance along the axial direction and a bottom portion opposite the top portion and proximate the tub of the washing machine appliance along the axial direction, and wherein the male dovetail and the female dovetail are tapered along the axial direction towards the bottom portion of the foam damper assembly.

12. The washing machine appliance of claim 9 , wherein the first foam friction element defines a square cross-sectional shape when in an uncompressed state and the second foam friction element defines a square cross-sectional shape when in an uncompressed state.

13. The washing machine appliance of claim 12 , wherein a depth of the first trough along the radial direction is less than a side length of the first foam friction element and a depth of the second trough along the radial direction is less than a side length of the second foam friction element.

14. The washing machine appliance of claim 12 , wherein a width of the first trough along the circumferential direction is less than a side length of the first foam friction element and a width of the second trough along the circumferential direction is less than a side length of the second foam friction element.

15. The washing machine appliance of claim 12 , wherein the square cross-sectional shape of the first foam friction element in the uncompressed state is the same as the square cross-sectional shape of the second foam friction element in the uncompressed state.

16. The washing m

Assignees

• Haier Us Appliance Solutions Inc

Inventors

• Davis Paul Owen

Classifications

• D06F37/268 Primary

  for suspension devices · CPC title

• D06F37/24

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

• F16F15/022

  using dampers and springs in combination · CPC title

• F16F7/095 Primary

  frictional elements brought into engagement by movement along a surface oblique to the axis of the cylinder, e.g. interaction of wedge-shaped elements · CPC title