Collet adaptor

• US 9,586,268 B2
• Filed: 02/20/2013
• Issued: 03/07/2017
• Est. Priority Date: 02/20/2012
• Status: Active Grant

• Current Assignee: ANCA Pty Ltd
• Original Assignee: ANCA Pty Ltd
• Inventors: McCluskey, Pat, Savanur, Sateesh
• Primary Examiner(s): Gates, Eric A
• Assistant Examiner(s): Su, Chwen-Wei
• Application Number:
  US14/379,517
• Publication Number:
  US 20150014947A1
• Time in Patent Office: 1,476 Days
• US Class Current: 1/1
• CPC Class Codes: B23B 2231/04 Adapters
• CPC Class Codes: B23B 2231/20 Collet chucks
• CPC Class Codes: B23B 2231/2005 Keys preventing rotation
• CPC Class Codes: B23B 2231/2083 Collets comprising screw threads
• CPC Class Codes: B23B 2260/034 Drawbars
• CPC Class Codes: B23B 2260/136 Springs
• CPC Class Codes: B23B 2260/142 Valves
• CPC Class Codes: B23B 2270/025 Hydraulics
• CPC Class Codes: B23B 2270/027 Pneumatics
• CPC Class Codes: B23B 31/102 Jaws, accessories or adjustment means B23B31/16008, B23B31/1605, B23B31/16087, B23B31/16125, B23B31/16162, B23B31/162, B23B31/16237, B23B31/1627 take precedence
• CPC Class Codes: B23B 31/2073 Axially fixed cam, moving jaws B23B31/20125 takes precedence
• CPC Class Codes: B23B 31/265 by means of collets
• CPC Class Codes: Y10T 279/17358 with jaw pads or insert
• CPC Class Codes: Y10T 279/3406 Adapter
• CPC Class Codes: Y10T 409/309408 with cutter holder
• CPC Class Codes: Y10T 409/309464 and draw bar

Abstract

A collet adaptor (10) including a body (11, 12) having forward and rear ends and an axial bore (17) extending through the forward and rear ends. A drawbar (13) disposed at least partly within the bore (17) for connection to a collet (14). The drawbar (13) is secured within the bore (17) and a biasing arrangement (42) acts on the drawbar (13) in a direction tending to shift the drawbar (13) rearwardly within the bore (17). The drawbar (13) is displaceable within the bore (17) against the biasing influence of the biasing arrangement (42) to shift forwardly within the bore (17).

Claims

1. A collet adaptor including a body, the body having forward and rear ends and an axial bore extending through the forward and rear ends, a drawbar disposed within the bore for connection to a collet, the bore being constructed so that the drawbar is insertable into the bore from the rear end of the bore and is retained within the bore after insertion by an annular retainer that secures the drawbar against release from the bore, the annular retainer and the body being connected by a threaded connection which extends coaxially with the axial bore, a forward end of the drawbar being for connection of a collet and the bore being constructed so that the collet can be inserted into the bore from the front end of the bore for connection with the forward end of the drawbar, a biasing arrangement within the bore acting on the drawbar in a direction tending to shift the drawbar rearwardly within the bore, an end of the drawbar extending out of the bore at the rear end of the body and the drawbar being displaceable within the bore against the biasing influence of the biasing arrangement by load applied to the drawbar end to shift forwardly within the bore.

2. A collet adaptor according to claim 1, the drawbar being displaceable from a collet retracted position to a collet extended position against the biasing influence of the biasing arrangement.

3. A collet adaptor according to claim 1, the biasing arrangement acting between the drawbar and the body.

4. A collet adaptor according to claim 1, the biasing arrangement comprising an annular spring.

5. A collet adaptor according to claim 4, the body and the drawbar defining an annular recess within which the annular spring is disposed.

6. A collet adaptor according to claim 5, the biasing arrangement comprising an annular bevel spring.

7. A collet adaptor according to claim 1, the biasing arrangement a plurality of annular disc springs.

8. A collet adaptor according to claim 1, the body being formed in at least two connected parts including a body portion and a spring retainer.

9. A collet adaptor according to claim 8, the annular retainer being annular and being annular and defining a central opening and the drawbar extending through the opening so that an end of the drawbar extends out of the annular retainer and the drawbar being displaceable against the biasing influence of the biasing arrangement by load applied to the end.

10. A collet adaptor according to claim 1, the connection of a collet to the drawbar being to a forward end of the drawbar.

11. A collet adaptor according to claim 10, the drawbar being threaded at a forward end for threaded connection with a collet.

12. A collet adaptor according to claim 1, the amount of forward displacement of the drawbar being limited by engagement between the body and the drawbar.

13. A collet adaptor according to claim 12, the biasing arrangement comprising an annular spring and the amount of forward displacement of the drawbar being limited by maximum compression of the spring.

14. A collet adaptor according to claim 1, including an anti-rotation device engaging the drawbar to prevent rotation of the drawbar within the bore.

15. A collet adaptor according to claim 14, the anti-rotation device being releasably engageable with the drawbar.

16. A collet adaptor according to claim 1, a rotation arrester being positioned for engaging a collet that has been connected to the drawbar to prevent rotation of the collet within the bore.

17. A combination of a collet adaptor according to claim 1 and a collet connected to the drawbar of the collet adaptor.

18. A collet adaptor according to claim 1, wherein the collet adaptor is adapted to permit installation and removal of the collet from the collet adaptor without removing any part of the collet adaptor.

19. A collet adaptor according to claim 1, wherein the annular retainer is coupled to the body at the rear end of the body.