Dynamic damper

Patent metadata

Field	Value
Publication number	US-2018156291-A1
Application number	US-201715813691-A
Country	US
Kind code	A1
Filing date	Nov 15, 2017
Priority date	Dec 7, 2016
Publication date	Jun 7, 2018
Grant date	—

Abstract

A dynamic damper includes a tubular member, a mass body, a protruding section, an elastic coupling section, a fastening member, and a projecting section. The protruding section is positioned toward the second end of the tubular member with respect to the projecting section. The projecting section and the protruding section overlap in the axial direction of the tubular member at any position reached by relatively rotating the mass body around the axial center of the tubular member with respect to the tubular member.

First claim

1 . A dynamic damper comprising:
a tubular member that has a first end and a second end, the first and second ends being both axial ends; a mass body that is tubular in shape and has an inner peripheral surface, the inner peripheral surface being disposed at a predetermined distance from an outer peripheral surface of the tubular member; a protruding section that protrudes from the inner peripheral surface of the mass body, has a leading end opposing the outer peripheral surface of the tubular member, and is molded integrally with the mass body; an elastic coupling section that is formed of a rubber elastic body, the rubber elastic body being adapted to couple the inner peripheral surface of the mass body and the protruding section to the outer peripheral surface of the tubular member; a fastening member that is inserted into the tubular member in order to fasten the second end of the tubular member to a target member; and a projecting section that is disposed at the first end and projects outward in an axis-perpendicular direction of the tubular member; wherein the protruding section is positioned toward the second end with respect to the projecting section; and wherein a part of the projecting section and a part of the protruding section overlap in the axial direction of the tubular member at any position reached by relatively rotating the mass body around the axial center of the tubular member with respect to the tubular member.

2 . The dynamic damper according to claim 1 , wherein the elastic coupling section is vulcanization-bonded to the mass body and to the protruding section; and
wherein the protruding section has a sloped surface that is contiguous to the inner peripheral surface of the mass body and approaches the outer peripheral surface of the tubular member when sloped toward the leading end from an axial outside.

3 . The dynamic damper according to claim 1 , wherein the mass body is a casting; and
wherein a cutting mark is formed on the leading end of the protruding section.

4 . The dynamic damper according to claim 1 , wherein the protruding section is formed contiguously in the circumferential direction of the mass body.

5 . The dynamic damper according to claim 4 , wherein the projecting section is formed on a circumferential part of the tubular member.

6 . The dynamic damper according to claim 1 , wherein the protruding section is formed on a circumferential part of the mass body.

7 . The dynamic damper according to claim 1 , wherein the protruding section protrudes from the axial center of the mass body.

8 . The dynamic damper according to claim 1 , wherein the protruding section protrudes from both axial ends of the mass body.

9 . The dynamic damper according to claim 1 , wherein the leading end of the protruding section and the outer peripheral surface of the tubular member are formed in parallel with the axial center.

Assignees

• Toyo Tire & Rubber Co

Inventors

• Seno Yoshiyuki

Classifications

• F16F1/38 Primary

  with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin {, i.e. bushing-type (hydraulically-damped bushes F16F13/14; suppression of vibrations in rotating systems by making use of elastomeric spring members between rotating elements, driveline torque being transmitted therebetween F16F15/126, by making use of a dynamic damping mass attached to a rotating element by means of elastomeric springs F16F15/14; pivots per se F16C11/00; elastic or yielding bearings or bearing supports F16C27/00; parts of sliding-contact bearings, e.g. bushes F16C33/04)} · CPC title

• F16F2230/24

  Detecting or preventing malfunction, e.g. fail safe · CPC title

• F16F2226/04

  Assembly or fixing methods; methods to form or fashion parts · CPC title

• F16F1/3732

  having an annular or the like shape, e.g. grommet-type resilient mountings · CPC title

• F16F7/1005

  characterised by active control of the mass · CPC title