Cam clutch

Patent metadata

Field	Value
Publication number	US-12305722-B2
Application number	US-202418773812-A
Country	US
Kind code	B2
Filing date	Jul 16, 2024
Priority date	Jul 25, 2023
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

Providing a cam clutch that has a torque limiter function adaptable to high torque with a simple structure, excellent accuracy, stability, and durability, and can be downsized and have an increased service life. The cam clutch includes: a plurality of cams disposed in a circumferential direction between at least one pair of an inner ring and an outer ring that are coaxial with each other and rotatable relative to each other; and biasing means for biasing the plurality of cams so as to come into contact with the inner ring and the outer ring. Each of the cams includes an inclination restricting portion that restricts inclination of the cam in an engaging direction by coming into contact with a locking portion that is provided in a portion of the cam clutch other than cam receiving surfaces of the inner ring and the outer ring.

First claim

What is claimed is:

1. A cam clutch having a torque limiter function, comprising:
at least one pair of an inner ring and an outer ring that are coaxial with each other and rotatable relative to each other;
a plurality of cams disposed in a circumferential direction between the inner ring and the outer ring; and
biasing means for biasing the plurality of cams so as to come into contact with the inner ring and the outer ring, wherein
each of the cams includes an inclination restricting portion that restricts inclination of the cam in an engaging direction by coming into contact with a locking portion provided in a portion of the cam clutch other than cam receiving surfaces of the inner ring and the outer ring such that the contact of the inclination restricting portion with the locking portion limits the inclination of the cam to a position at which the cam transmits a predetermined torque between the inner ring and the outer ring to limit amount of transmitted torque between the inner ring and the outer ring.

2. The cam clutch having the torque limiter function according to claim 1 , wherein
the locking portion is provided in a cage member that supports and lines up the plurality of cams in the circumferential direction.

3. The cam clutch having the torque limiter function according to claim 2 , wherein
the locking portion is provided in a restriction member that is fitted to the outer ring or the inner ring from a side in an axial direction.

4. The cam clutch having the torque limiter function according to claim 1 , wherein
the inclination restricting portion is provided in one end portion or two end portions of the cam in an axial direction, and
the locking portion is provided directly or indirectly to a portion of the outer ring or the inner ring other than the cam receiving surface of the outer ring or the inner ring.

5. A cam clutch having a torque limiter function, comprising:
at least one pair of an inner ring and an outer ring that are coaxial with each other and rotatable relative to each other;
a plurality of cams disposed in a circumferential direction between the inner ring and the outer ring; and
biasing means for biasing the plurality of cams so as to come into contact with the inner ring and the outer ring, wherein
each of the cams includes an inclination restricting portion that restricts inclination of the cam in an engaging direction by coming into contact with a locking portion provided in a portion of the cam clutch other than cam receiving surfaces of the inner ring and the outer ring,
wherein the inclination restricting portion restricts the inclination of the cam in the engaging direction when a torque higher than a predetermined torque is applied during transmitting a torque equal to or lower than the predetermined torque between the inner ring and the outer ring through engagement of the cam between the inner ring and the outer ring to cause slipping between a cam surface of the cam and the cam receiving surface of the inner ring or the outer ring to limit amount of transmitted torque.

6. A cam clutch having a torque limiter function, comprising:
at least one pair of an inner ring and an outer ring that are coaxial with each other and rotatable relative to each other;
a plurality of cams disposed in a circumferential direction between the inner ring and the outer ring; and
biasing means for biasing the plurality of cams so as to come into contact with the inner ring and the outer ring, wherein
each of the cams includes an inclination restricting portion that restricts inclination of the cam in an engaging direction by coming into contact with a locking portion provided in a portion of the cam clutch other than cam receiving surfaces of the inner ring and the outer ring,
wherein the locking portion is provided in a restriction member that is fitted to the outer ring or the inner ring from a side in an axial direction.

Assignees

• Tsubakimoto Chain Co

Inventors

• Sugiya Tsubasa
• Nakagawa Eiichi
• Kurematsu Yuji
• Fukuda Akihiro
• Kamihigashi Hiroyuki

Classifications

• F16D7/022

  with a helical band or equivalent member co-operating with a cylindrical torque limiting coupling surface · CPC title

• F16D41/084

  the intermediate coupling members wedging by pivoting or rocking · CPC title

• F16D41/07 Primary

  between two cylindrical surfaces · CPC title

• F16D2041/0603

  Sprag details · CPC title

• F16D41/069 Primary

  the intermediate members wedging by pivoting or rocking, e.g. sprags (F16D41/061 takes precedence) · CPC title