Vehicle vibration dampening mount assembly

Patent metadata

Field	Value
Publication number	US-10088009-B2
Application number	US-201615388622-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Dec 22, 2016
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

A vibration dampening mount assembly includes a housing, resilient material, a sleeve and a restricting structure. The resilient material is fixedly attached to an interior surface of the housing and defines a first chamber and a second chamber. The sleeve is disposed within the housing and is centrally attached to the resilient material. The restricting structure between the first chamber and the second chamber includes a first portion attached to the housing and a second portion attached to the sleeve. In response to movement of the sleeve relative to the housing, the second portion of the restricting structure moves relative to the first portion. The first portion and the second portion of the restricting structure define a fluid passageway therebetween. The cross-sectional area of the fluid passageway changes in response to movement of the second portion relative to the first portion.

First claim

What is claimed is:

1. A vibration dampening mount assembly comprising:
a housing having interior surface, a first end and a second end;
a resilient material having an outer portion fixedly attached to the interior surface of the housing and at least partially defining a first chamber and a second chamber within the housing;
a sleeve disposed within the housing and being fixedly attached to a central portion of the resilient material, the sleeve extending from proximate the first end to the second end of the housing; and
a restricting structure disposed between the first chamber and the second chamber within the housing, with a first portion of the restricting structure being attached to the housing and a second portion of the restricting structure being attached to the sleeve such that in response to movement of the sleeve rotative to the housing, the second portion of the restricting structure moves relative to the first portion, the first portion and the second portion of the restricting structure defining a fluid passageway therebetween, the fluid passageway providing fluid communication between the first and second chambers, the cross-sectional area of the fluid passageway changing in response to movement of the second portion relative to the first portion.

2. The vibration dampening mount assembly of claim 1 , wherein
the first portion is non-movably fixed to the housing for movement therewith and includes a pair of first wall sections with a first space being defined therebetween, and
the second portion is non-movably fixed to the sleeve for movement therewith, the second portion defining a pair of second wall sections with a second space being defined therebetween, the first wall sections extending into the second space such that the first space and the second space define the fluid passageway.

3. The vibration dampening mount assembly of claim 2 , wherein
each of the pair of first wall portions defines a first outer surface and a first inner surface, with the first inner surfaces facing one another and having a first end surface extending therebetween,
each of the pair of second wall portions defines a second outer surface and a second inner surface, with the second inner surfaces facing one another and having a second end surface extending therebetween,
the first outer surfaces being disposed along sections of the second inner surfaces for sliding movement relative thereto, and
the first inner surfaces and the first end surface, the second inner surfaces and the second end surface surrounding a portion of the fluid passageway.

4. The vibration dampening mount assembly of claim 1 , wherein
the second portion defines an inner radial end fixed to the sleeve and a second radial end that is fixed to the housing via a resilient attachment member such that the second portion is movable relative to the housing.

5. The vibration dampening mount assembly of claim 1 , wherein
the first portion is non-movably fixed to the housing for movement therewith and defines the fluid passageway therein with a pair of first end walls spaced apart from one another defining an opening, the opening being open to the fluid passageway, and
the second portion is non-movably fixed to the sleeve for movement therewith, the second portion defining a second wall section with part of the second wall section extending between the first end walls and into the fluid passageway such that movement of the sleeve relative to the housing further moves the second wall section relative to the first end walls thereby changing an amount of the part of the second wall section extending into the fluid passageway.

6. The vibration dampening mount assembly of claim 5 , wherein
the first portion defines an outer radial end fixed to the housing and a second radial end that is fixed to the sleeve via a resilient attachment member such that the sleeve is movable relative to the first portion and the housing.

7. The vibration dampening mount assembly of claim 1 , wherein
the first portion includes a first part that is connected to the housing for movement therewith via a resilient member such that the first part can undergo limited movement relative to the housing, the first part having a first leg that extends to the sleeve,
the second portion includes as first cam-pin non-movably fixed to the sleeve for movement therewith such that with the sleeve in an at rest orientation relative to the housing, the first cam-pin is spaced apart from the first leg, and with the sleeve moved in a first direction relative to the housing the first cam-pin contacts the first leg of the first part causing movement of the first part relative to the housing.

8. The vibration dampening mount assembly of claim 7 , wherein
the first portion includes a second part that is connected to the housing for movement therewith via a resilient member such that the second part can undergo limited movement relative to the housing and the first part, the second part having a second leg that extends to the sleeve,
the second portion includes a second cam-pin non-movably fixed to the sleeve for movement therewith such that with the sleeve in the at rest orientation relative to the housing, the second cam-pin is spaced apart from the second leg, and with the sleeve moved in a second direction relative to the housing opposite the first direction, the second cam-pin contacts the second leg of the second part causing movement of the second part relative to the housing.

9. The vibration dampening mount assembly of claim 8 , wherein
the first part of the first portion includes a pair of first wall sections with a first space being defined therebetween, and
the second part of the first portion defines a pair of second wall sections with a second space being defined therebetween, the second wall sections extending into the first space such that the first space and the second space define the fluid passageway.

10. The vibration dampening mount assembly of claim 9 , wherein
each of the pair of first wall portions defines a first outer surface and a first inner surface, with the first inner surfaces facing one another and having a first end surface extending therebetween,
each of the pair of second wall portions defines a second outer surface and a second inner surface, with the second inner surfaces facing one another and having a second end surface extending therebetween,
the second outer surfaces being disposed along sections of the first inner surfaces for sliding movement relative thereto, and
the first inner surfaces, the first end surface, the second inner surfaces and the second end surface surrounding a portion of the fluid passageway.

11. The vibration dampening mount assembly of claim 10 , wherein
one of the first part and the second part of the first portion of the restricting structure includes an alignment pin that slidably extends into an alignment aperture of the other of the first part and the second part, the alignment pin being configured to limit relative movement between the first part and the second part to linear movement in a direction parallel to the sleeve.

12. The vibration dampening mount assembly of claim 1 , wherein
the first portion is non-movably fixed to the housing for movement therewith and includes a first pin that extends in a direction parallel to the sleeve, the first pin having a concaved portion,
the second portion is non-movably fixed to the sleeve for movement therewith, the second portion defining a first opening that at least partially defines the fluid passageway, the first opening extending from the first chamber to the second chamber, the first pin extending into the first opening with the

Assignees

• Nissan North America Inc

Inventors

• Nydam Scott

Classifications

• F16F13/10 Primary

  the wall being at least in part formed by a flexible membrane or the like (F16F13/14 - F16F13/18 take precedence) · CPC title

• B62D33/0604 Primary

  Cabs insulated against vibrations or noise, e.g. with elastic suspension (resilient connections between superstructure sub-units B62D27/04; damping noise in general G10K11/00; for vehicles in general B60R13/08) · CPC title

• B62D24/04

  Vehicle body mounted on resilient suspension for movement relative to the vehicle frame · CPC title

• B62D24/02

  Vehicle body, not intended to move relatively to the vehicle frame, and mounted on vibration absorbing mountings, e.g. rubber pads · CPC title