CHUCK AND COLLET FOR SHANK PINIONS AND THE LIKE

• US 3,583,714 A
• Filed: 11/27/1968
• Issued: 06/08/1971
• Est. Priority Date: 11/27/1968
• Status: Expired due to Term

• Current Assignee: Edwin C. Jaehn, Gene P. Weltzer
• Original Assignee: Edwin C. Jaehn, Gene P. Weltzer
• Inventors: Weltzer, Gene P., Jaehn, Edwin C.
• Application Number:
  US04/779,481
• Time in Patent Office: 923 Days
• US Class Current: 279/51
• CPC Class Codes: B23B 31/202 Details of the jaws
• CPC Class Codes: B23B 31/2073 Axially fixed cam, moving jaws B23B31/20125 takes precedence
• CPC Class Codes: B23F 23/06 Chucking arrangements
• CPC Class Codes: Y10T 279/17529 Fixed cam and moving jaws
• CPC Class Codes: Y10T 279/28 for gear or spline molding
• CPC Class Codes: Y10T 279/29 More than one set of gripping means

Abstract

A collet is provided with axially spaced work-gripping surfaces which operate independently of each other to effect precise alignment of a workpiece relative to a work spindle. The collet is of a unitary construction and is slidably arranged in a tubular chuck body.

Claims

1. A collet for gripping the shank of a shank pinion at two axially spaced regions, said collet comprising:

a tubular body having first and second axially spaced internal gripping surfaces;

means providing an external centering means disposed intermediate the ends of said body; and

first and second external cam surface means provided on said body outwardly of said first and second internal gripping surfaces, respectively;

said first cam surface means projecting radially outwardly from said body a greater distance than said second cam surface means, and said external centering means also projecting radially outwardly from said body a lesser distance than said first cam surface means and a greater distance than said second cam surface means.

2. The collet defined in claim 1 wherein said centering means includes an annular projection on said body, intermediate said first and second external cam surface means.

3. The collet defined in claim 1 wherein said tubular body is provided with two sets of axial slots extending from each end of said body inwardly toward said centering means, and further wherein the slots of one set are circumferentially staggered relative to the slots of the other set.

4. A chuck for shank pinions, said chuck comprising a collet and a tubular body, an actuator means slidable axially in said body, said collet being of rigid one-piece, unitary construction and slidably arranged in said body forwardly of said actuator means, two external cam surface means being provided on said collet at axially spaced regions thereon, internal cam surface means being provided in said body and on said actuator means and adapted for camming engagement with said external cam surface means, and external centering means being provided on said collet in slidable engagement with said tubular body and intermediate said external cam surface means.

5. The chuck defined in claim 4 wherein two sets of axially extending slots are provided in said collet, one of said sets of slots being disposed entirely on one side of said centering means and the other of said slots being disposed entirely on the other side of said centering means.

6. The chuck defined in claim 4 wherein said external cam surface means are provided on the collet adjacent the front and rear thereof, and means for releasably engaging said collet to said actuator means.

7. The chuck defined in claim 6 wherein said means for releasably engaging said collet to said actuator means includes the rear cam surface means on said collet and the cam surface means on said actuator, both of said last-named surface means being defined by spaced, radial projections and recesses between said projections constructed and arranged to provide a bayonet-type joint.

8. The chuck defined in claim 4 wherein said centering means is in the form of an annular collar on said collet.