Liquid-filled vibration damping device

Patent metadata

Field	Value
Publication number	US-12370877-B2
Application number	US-202318165514-A
Country	US
Kind code	B2
Filing date	Feb 7, 2023
Priority date	Feb 25, 2022
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A liquid-filled vibration damping device including a main unit and a bracket, the main unit including first and second attachments connected by a rubber body, and a closure member locked to the second attachment from below with a seal member sandwiched therebetween to seal a liquid chamber. The second attachment includes a pair of metallic connectors inserted into a pair of metallic grooves of the bracket. The metal is exposed on lower faces of the connectors which are pressed against groove-inside lower faces of the grooves in metal-to-metal contact. Convex parts protruding downward are provided at far-side ends of the connectors while concave parts are provided on the grooves at locations corresponding to the convex parts. Detent engagers preventing dislodgment of the connectors inserted in the grooves are constituted in metal-to-metal contact by the convex parts entering the concave parts to be engaged.

First claim

What is claimed is:

1. A liquid-filled vibration damping device comprising:
a vibration-damping device main unit comprising:
a first attachment member and a second attachment member that are vertically remote from each other and are elastically connected by a main rubber elastic body, the second attachment member comprising a pair of connecting parts provided on opposite sides, and
a closure member overlapped on and locked to the second attachment member from below with a seal member sandwiched therebetween to define and seal a liquid chamber; and

a bracket comprising opposite leg parts, the opposite leg parts comprising a pair of connecting grooves provided on opposed inner faces of the opposite leg parts, the vibration-damping device main unit being attached to the bracket from a lateral side by the pair of the connecting parts being inserted into the pair of the connecting grooves, wherein
the pair of the connecting parts of the second attachment member and the pair of the connecting grooves of the bracket are all made of metal,
upper urging rubbers are provided on respective upper faces of the pair of the connecting parts while the metal is exposed on lower faces of the pair of the connecting parts, and the pair of the connecting parts are pressed against groove-inside lower faces of the pair of the connecting grooves in metal-to-metal contact by elastic reaction forces due to the upper urging rubbers being in contact with groove-inside upper faces of the pair of the connecting grooves,
engaging convex parts are provided on the respective lower faces of the pair of the connecting parts, the engaging convex parts being located at far-side ends in a direction of insertion into the pair of the connecting grooves and protruding downward, while engaging concave parts are provided on the respective groove-inside lower faces of the pair of the connecting grooves at locations corresponding to the engaging convex parts, and
detent engagers that prevent dislodgment of the pair of the connecting parts inserted in the pair of the connecting grooves are constituted in metal-to-metal contact by the pair of the connecting parts being inserted into the pair of the connecting grooves and the engaging convex parts of the connecting parts moving toward a far side in the direction of insertion on the groove-inside lower faces of the pair of the connecting grooves to enter the engaging concave parts of the pair of the connecting grooves to be engaged.

2. The liquid-filled vibration damping device according to claim 1 , wherein the bracket further comprises a lower support part that is in contact with the closure member of the vibration-damping device main unit from below and supports the closure member with the seal member sandwiched between the closure member and the second attachment member supported by the pair of the connecting grooves of the bracket.

3. The liquid-filled vibration damping device according to claim 1 , wherein outer peripheral urging rubbers are provided on respective outer peripheral surfaces of the pair of the connecting parts, and the outer peripheral urging rubbers are in contact with respective groove-inside bottom faces of the pair of the connecting grooves.

4. The liquid-filled vibration damping device according to claim 1 , wherein
left and right opposite side portions of the second attachment member include flat lower faces, and concave surfaces are formed on respective outer peripheral end edges of the flat lower faces of the left and right opposite side portions, the concave surfaces extending linearly in a front-back direction from a backward-side end toward a forward side in the direction of insertion into the pair of the connecting grooves,
the pair of the connecting parts are constituted by the left and right opposite side portions where the respective concave surfaces are formed, and the concave surfaces comprise exposed surfaces of the metal that are pressed against the groove-inside lower faces of the pair of the connecting grooves in metal-to-metal contact, and
the concave surfaces do not reach respective forward-side ends on the flat lower faces of the left and right opposite side portions, and the engaging convex parts are constituted by portions where the concave surfaces are not formed on the forward side with respect to the concave surfaces.

5. The liquid-filled vibration damping device according to claim 1 , wherein a distal end urging rubber is provided on a distal end face of the second attachment member in a direction of attachment from the lateral side to the bracket and is in contact with the bracket in the direction of attachment.

6. The liquid-filled vibration damping device according to claim 1 , wherein the groove-inside upper faces of the pair of the connecting grooves have a guide taper at least in opening portions on a side from which the pair of the connecting parts are inserted, the guide taper sloping to increase a groove width from the far side toward an opening side in the direction of insertion of the pair of the connecting parts.

7. The liquid-filled vibration damping device according to claim 1 , wherein
the bracket includes a pair of support leg parts that are opposed to each other with a prescribed distance therebetween,
the pair of the connecting grooves are provided on opposed inner faces of the pair of the support leg parts,
a far wall is provided on a side opposite to a side to which the vibration-damping device main unit is attached between the pair of the support leg parts, and
the engaging concave parts provided at the far-side ends of the pair of the connecting grooves are formed such that the engaging concave parts penetrate the far wall and extend to the far side.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Kondo Hiroki
• Oki Kenji

Classifications

• F16J15/104

  characterised by structure · CPC title

• B60K5/1208 Primary

  Resilient supports (B60K5/1241 - B60K5/1291 take precedence) · CPC title

• F16F13/103 Primary

  characterised by method of assembly, production or treatment · CPC title

• F16F15/08 Primary

  with rubber springs {(grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38); with springs made of rubber and metal (arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604)} · CPC title