Vibration reducing grommet

Patent metadata

Field	Value
Publication number	US-10976063-B2
Application number	US-202016776728-A
Country	US
Kind code	B2
Filing date	Jan 30, 2020
Priority date	Feb 19, 2019
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A grommet assembly includes a bolt assembly that has a head portion. A grommet includes a tapering bolt opening for accepting the bolt assembly. A projecting portion extends from a body portion and has an overhang adjacent a distal end. The bolt opening at least partially defines a radial gap between the grommet and the bolt assembly. The head portion of the bolt assembly is spaced from the distal end of the projecting portion by an axial gap.

First claim

What is claimed is:

1. A grommet assembly comprising;
a bolt assembly having a bolt with a head portion and a sleeve at least partially surrounding the bolt; and
a grommet including a tapering bolt opening for accepting the bolt assembly, a projecting portion extending from a body portion having an overhang adjacent a distal end, wherein the bolt opening at least partially defines a radial gap between the grommet and the bolt assembly, the head portion of the bolt assembly is spaced from the distal end of the projecting portion by an axial gap, and a proximal end of the sleeve extends from a first pan contact surface on a base of the body portion.

2. The grommet assembly of claim 1 , further comprising a plurality of ribs extending radially inward from an inner surface of the bolt opening toward the bolt assembly and a radially inner surface of the ribs are spaced from the bolt assembly.

3. The grommet assembly of claim 1 , wherein the grommet includes a support portion extending from the body portion having a support portion base contact surface and the overhang includes an overhang base portion contact surface.

4. The grommet assembly of claim 3 , wherein the support portion base contact surface and the overhang base portion contact surface face opposite axial directions and the support portion base contact surface is located radially outward from a radially outermost portion of the overhang.

5. The grommet assembly of claim 1 , wherein the head portion includes a cap portion and the cap portion is spaced from the distal end of the projecting portion by the axial gap and the cap portion contacts a distal end of the sleeve.

6. The grommet assembly of claim 1 , wherein the radial gap extends more than 50% of an axial length of the sleeve.

7. The grommet assembly of claim 6 , wherein the axial length of the sleeve is greater than an axial length of the grommet with a distal end of the sleeve extending longitudinally beyond the projection portion.

8. The grommet assembly of claim 1 , further comprising a plurality of ribs extending radially inward from an inner surface of the bolt opening toward the bolt assembly, wherein the head portion includes a cap portion and the cap portion is spaced from the distal end of the projecting portion by the axial gap and the tapering bolt opening tapers radially outward from a mid-portion to a distal end adjacent the projecting portions.

9. The grommet of claim 1 , wherein the bolt opening includes a sleeve contact surface engaging a perimeter of the sleeve.

10. The grommet of claim 1 , wherein the base of the body portion includes a second pan contact surface spaced radially outward from the first contact surface by a positioning trough extending into the base of the body portion.

11. The grommet of claim 4 , wherein the support portion is spaced radially outward from the projection portion and at least partially longitudinally aligned with the projection portion with a trough at least partially separating the projecting portion of the support portion base contact surface.

12. An outdoor HVAC unit comprising:
a housing having a base pan;
a compressor having a base;
a grommet assembly connecting the base pan to the compressor base, wherein the grommet assembly includes:
a bolt assembly having a bolt with a head portion and a sleeve at least partially surrounding the bolt; and
a grommet having a tapering bolt opening for accepting the bolt assembly, a projecting portion extending from a body portion having an overhang adjacent a distal end for engaging the compressor base, wherein the bolt opening tapers radially outward from a mid-portion spaced from a ledge to a distal end adjacent the projecting portions, the bolt opening at least partially defines a radial gap between the grommet and the bolt assembly and includes a sleeve contact surface engaging a perimeter of the sleeve, and the head portion of the bolt assembly is spaced from the distal end of the projecting portion by an axial gap.

13. The outdoor HVAC unit of claim 12 , wherein the grommet assembly further comprises a plurality of ribs extending radially inward from an inner surface of the bolt opening toward the bolt assembly and a radially inner surface of the ribs are spaced from the bolt assembly.

14. The outdoor HVAC unit of claim 12 , wherein the grommet includes a support portion extending from the body portion having a support portion contact surface engaging a first side of the compressor base and the overhang includes an overhang contact surface engaging a second opposite side of the compressor base with the support portion base contact surface located radially outward from a radially outermost portion of the overhang and the projecting portion extends through an opening in the compressor base.

15. The outdoor HVAC unit of claim 12 , wherein the head portion includes a cap portion and the cap portion is spaced from the distal end of the projecting portion by the axial gap.

16. The outdoor HVAC unit of claim 12 , wherein the radial gap extends more than 50% of an axial length of the sleeve and a proximal end of the sleeve extends from a first pan contact surface on a base of the body portion.

17. The outdoor HVAC unit of claim 16 , wherein the axial length of the sleeve is greater than an axial length of the grommet with a distal end of the sleeve extending longitudinally beyond the projection portion.

18. The outdoor HVAC unit of claim 12 , wherein the bolt assembly engages the base pan the base of the body portion includes a second pan contact surface spaced radially outward from the first contact surface by a positioning trough extending into the base of the body portion.

19. The outdoor HVAC unit of claim 14 , wherein the support portion is spaced radially outward from the projection portion and at least partially longitudinally aligned with the projection portion with a trough at least partially separating the projecting portion of the support portion base contact surface.

Assignees

• Carrier Corp

Inventors

• Zhou Wei
• Sardar Asad M
• Lee Jun Pyo
• Wilkerson Sherri R
• Blessing Dennis J
• Greenwood Brooke

Classifications

• F24F1/40 Primary

  Vibration or noise prevention at outdoor units (for outdoor units compressors F24F1/12) · CPC title

• F24F1/12 Primary

  Vibration or noise prevention thereof · CPC title