Damping component and structure including the same

Patent metadata

Field	Value
Publication number	US-2016273612-A1
Application number	US-201615073887-A
Country	US
Kind code	A1
Filing date	Mar 18, 2016
Priority date	Mar 20, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A dumping structure includes a first frame on which a driving portion is mounted, a second frame, a fixture fixing the first frame to the second frame, a restrict portion, provided around the fixture and provided between the first and second frames, which restricts a distance between the first and second frames, and a damping member, provided around the restrict portion, which is compressed by the first and second frame. The damping member has rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and has a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.

First claim

What is claimed is:

1 . A damping structure comprising:
a first frame on which a driving portion is mounted; a second frame; a fixture which fixes the first frame to the second frame; a restrict portion, provided around the fixture and provided between the first and second frames, which restricts a distance between the first and second frames; and a damping member, provided around the restrict portion, which is compressed by the first and second frame, the damping member having rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and having a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.

2 . The damping structure according to claim 1 , wherein the restrict portion has rigidity which is greater than rigidity of the first frame and rigidity of the second frame.

3 . The damping structure according to claim 1 , wherein the damping member is disposed between the first frame and the restrict portion.

4 . The damping structure according to claim 3 , wherein the damping member is disposed between the second frame and the restrict portion.

5 . The damping structure according to claim 1 , wherein the restrict portion is the cylindrical member and the damping member is provided around an outer circumferential surface of the cylindrical member.

6 . The damping structure according to claim 5 , further comprising an opposed member provided around an outer circumference of the damping member in a radial direction of the cylindrical member and compressing the damping member with the cylindrical member.

7 . The damping structure according to claim 6 , wherein a length of the opposed member in an axial direction of the cylindrical member is shorter than a distance between the first and second frames.

8 . The damping structure according to claim 1 , wherein the damping member has hardness of 70 degrees or less in terms of Asker C hardness.

9 . The damping structure according to claim 1 , wherein the damping member is compressed more than 0% and less than 50% from a thickness thereof before compression.

10 . The damping structure according to claim 1 , wherein the fixture is a screw member including a head portion abutting with an outer surface of either one of the first and second frames and a male thread portion screwed into a screw hole provided in the other one of the first and second frames, and
wherein the restrict portion includes a through hole through which the male thread portion of the screw member passes.

11 . A damping structure comprising:
a first frame on which a driving portion is mounted; a second frame; a restrict portion restricting a distance between the first and second frames; and a damping member provided around the restrict portion and compressed by the first and second frames, the damping member having rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and having a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.

12 . The damping structure according to claim 11 , wherein the restrict portion has rigidity which is greater than rigidity of the first frame and rigidity of the second frame.

13 . The damping structure according to claim 11 , wherein the damping member is disposed between the first frame and the restrict portion.

14 . The damping structure according to claim 13 , wherein the damping member is disposed between the second frame and the restrict portion.

15 . The damping structure according to claim 11 , wherein the restrict portion is the cylindrical member and the damping member is provided around an outer circumferential surface of the cylindrical member.

16 . The damping structure according to claim 15 , further comprising an opposed member provided around an outer circumference of the damping member in a radial direction of the cylindrical member and compressing the damping member with the cylindrical member.

17 . The damping structure according to claim 16 , wherein a length of the opposed member in an axial direction of the cylindrical member is shorter than a distance between the first and second frames.

18 . The damping structure according to claim 11 , wherein the damping member has hardness of 70 degrees or less in terms of Asker C hardness.

19 . The damping structure according to claim 11 , wherein the damping member is compressed more than 0% and less than 50% from a thickness thereof before compression.

20 . The damping structure according to claim 11 , further comprising a screw member including a head portion abutting with an outer surface of either one of the first and second frames and a male thread portion screwed into a screw hole provided in the other frame,
wherein the restrict portion is provided between the head and male thread portions of the screw member.

21 . The damping structure according to claim 11 , wherein the restrict portion projects from one frame to the other frame among the first and second frames and fits into a fitted portion provided in the other frame.

22 . A damping component disposed between first and second frames connected by a fixture, the damping component comprising:
a base portion with a through hole through which the fixture penetrates; and a compressible damping member provided on the base portion, the damping member having rigidity lower than rigidity of the base portion and having a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.

23 . The damping component according to claim 22 , wherein the damping member has hardness of 70 degrees or less in terms of Asker C hardness.

24 . The damping component according to claim 22 , wherein the damping member is disposed around the base portion, and
wherein the damping component further comprises an opposed member disposed around the damping member and compressing the damping member with the base portion.

25 . A damping component comprising:
a base portion with a through hole through which a fixture penetrates; and a compressible damping member provided around the base portion; wherein a length of the damping member in a direction in which the fixture penetrates is longer than a length of the base portion in this direction.

26 . The damping component according to claim 25 , wherein the damping member has hardness of 70 degrees or less in terms of Asker C hardness.

27 . The damping component according to claim 25 , wherein the damping component further includes an opposed member disposed around the damping member and compressing the damping member with the base portion.

Assignees

• Canon Kk

Inventors

• Endo Rie
• Yokoyama Katsunori
• Yamamoto Shinji
• Takahata Kazuaki
• Shibata Kazumasa
• KASAMA Hiroki

Classifications

• F16F1/3732

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

• F16F1/36

  made of rubber or other material having high internal friction, {e.g. thermoplastic elastomers (spring units consisting of several springs F16F3/08)} · CPC title

• F16F2228/06

  Stiffness · CPC title

• F16F2228/007

  of solids, e.g. hardness · CPC title