Cam transmission mechanism with ball followers

Patent metadata

Field	Value
Publication number	US-11668376-B2
Application number	US-202217946865-A
Country	US
Kind code	B2
Filing date	Sep 16, 2022
Priority date	Sep 17, 2021
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A cam transmission mechanism includes a rotary disk, a camshaft, contact members and a housing. The rotary disk has a periphery formed with equidistant projections, any two adjacent ones of which define an accommodating recess. The camshaft includes a shaft rod and a cam body that has at least one groove communicated with some of the recesses of the rotary disk. The groove and the recesses cooperate to form a plurality of confining spaces, within which the contact members are accommodated freely rollably for rotation transfer from the camshaft to the rotary disk. The housing is connected to the rotary disk for confining the contact members in the confining spaces, respectively.

First claim

What is claimed is:

1. A cam transmission mechanism, comprising:
a revolving disk rotatable about a first axis, including a disc-shaped body having a periphery formed with a plurality of projections, any two adjacent ones of said plurality of projections which defining an accommodating recess therebetween; and
a camshaft adjoining said rotary disk along a second axis that is perpendicular to the first axis and rotatable about a third axis that is perpendicular to both said first axis and said second axis, said camshaft including:
a shaft rod, and
a cam body sleeved on said shaft rod, said cam body having an outer surface abutting against said periphery and at least one groove that is formed in said outer surface and that is communicated with some of said accommodating recesses, said at least one groove and said accommodating recesses cooperating to form a plurality of confining spaces, respectively, each extending partially along a tangential direction of said rotary disk;

a plurality of contact members, each accommodated freely rollably in said confining spaces for transmitting rotational power of said camshaft to said rotary disk; and
a housing receiving said rotary disk so as to confine said contact members therebetween and in said confining spaces, respectively.

2. The cam transmission mechanism as claimed in claim 1 , wherein:
each of said accommodating recesses extends through said rotary disk in a direction inclined relative to said first axis; and
said cam body has a plurality of grooves surrounding said third axis.

3. The cam transmission mechanism as claimed in claim 1 , wherein:
each of said accommodating recesses extends through said rotary disk in a direction parallel to said first axis; and
said at least one groove of said cam body is a spiral groove surrounding said third axis.

4. The cam transmission mechanism as claimed in claim 1 , wherein each accommodating recess of said rotary disk has an arc-shaped cross-section in a direction parallel to said first axis.

5. The cam transmission mechanism as claimed in claim 1 , wherein said at least one groove of said camshaft has an arc-shaped cross-section in the direction parallel to said first axis.

6. The cam transmission mechanism as claimed in claim 1 , wherein said cam body of said camshaft further has a plurality of cam portions, each of said cam portions having a cross-section perpendicular to said third axis, which has a first end nearest to said shaft rod and a second end diametrically opposite to said first end and farthest from said shaft rod.

7. The cam transmission mechanism as claimed in claim 1 , wherein each contact member is a ball.

8. The cam transmission mechanism as claimed in claim 1 , wherein said housing includes a housing body and an adjustable member attached to said housing body and movable relative to said housing body in a direction parallel to said first axis for changing distances between said contact members and walls of said rotary disk defining said recesses, respectively.

9. The cam transmission mechanism with as claimed in claim 1 , wherein said housing includes a housing seat for installing said camshaft and an adjustable member attached to said housing seat and movable relative to said housing seat in a direction parallel to said second axis for changing distances between said contact members and walls of said rotary disk defining said recesses, respectively.

Assignees

• National Sun Yat Sen University

Inventors

• Tsay Der-Min
• Hsu Kun-Lung
• Chen Wei-Ming

Classifications

• F16H57/021

  Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title

• F16H2057/0221

  Axial adjustment · CPC title

• F16H1/163 Primary

  with balls between the co-operating parts · CPC title

• F16H2057/0213

  Support of worm gear shafts · CPC title

• F16H2025/063

  the intermediate members being balls engaging on opposite cam discs · CPC title