US 12,000,452 B2
Cylindrical antivibration device for motor mount
Junji Abe, Aichi (JP)
Assigned to Sumitomo Riko Company Limited, Aichi (JP)
Filed by Sumitomo Riko Company Limited, Aichi (JP)
Filed on Apr. 9, 2021, as Appl. No. 17/226,089.
Application 17/226,089 is a continuation of application No. PCT/JP2020/008129, filed on Feb. 27, 2020.
Claims priority of application No. 2019-037000 (JP), filed on Feb. 28, 2019.
Prior Publication US 2021/0222753 A1, Jul. 22, 2021
Int. Cl. F16F 15/08 (2006.01); B60K 1/00 (2006.01)
CPC F16F 15/08 (2013.01) [B60K 1/00 (2013.01); F16F 2224/025 (2013.01); F16F 2230/0005 (2013.01); F16F 2234/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cylindrical antivibration device for a motor mount, which is configured such that an inner shaft member and an outer cylinder member are connected to each other by a body rubber elastic element and is mounted between an electric motor for driving of a vehicle and a support member, wherein
facing surfaces of the inner shaft member and the outer cylinder member in a direction perpendicular to a shaft are continuous over an entire circumference in a circumferential direction and are connected to each other by the body rubber elastic element, and
an elastic protrusion that protrudes outward in an axial direction at an intermediate portion between the facing surfaces of the inner shaft member and the outer cylinder member and extends in the circumferential direction is formed integrally with the body rubber elastic element on an end face of the body rubber elastic element in the axial direction;
wherein
a protrusion height of the elastic protrusion is set as T, and a length of the body rubber elastic element in the axial direction is set as L,
0.1≤L≤T≤L is satisfied;
wherein
a thickness dimension of the elastic protrusion is set as W, and a thickness dimension of the body rubber elastic element is set as R,
0.1 R≤W≤0.8 R is satisfied.