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Double acting torque chuck

a torque chuck and double-action technology, applied in the field of chucks, can solve the problems of slipping between the inner hollow core of the roll and the chuck, devices that require complicated construction and/or fine machined surfaces,

Inactive Publication Date: 2005-10-13
TIDLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often however, there is slippage between the inner hollow core of the roll and the chuck.
Similar devices uses sliding bars or ball bearings to achieve the same result, but such devices require complicated construction and / or finely machined surfaces to create the correct type of cam action.

Method used

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  • Double acting torque chuck
  • Double acting torque chuck
  • Double acting torque chuck

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] A double-acting torque chuck 10 includes a base plate 12 and a flanged trunnion 14 coupled to the base plate 12 by a plurality of bolts 16. The trunnion 14 includes a flanged portion 17 and a center axle 15. A cage 18 surrounds the center axle 15. The cage 18, which is rotatable with respect to the trunnion 14, retains radially moveable lugs 20a, 20b and 20c. The cage 18 is held in place by a frustoconical top member 22 which is connected to the central axle 15 by a bolt 22a. As shown best in FIG. 2, the cage 18 has an annular flange 18a. The annular flange 18a rests on a ring 24 which fits into an annular recess in the flange portion 17.

[0013] Three roller bars or cylindrical rods 28a, 28b and 28c fit loosely into slots in top and bottom synchronizer rings 30a and 30b, respectively, which retain the rods sixty degrees apart in parallel relationship along the outside of the axle 15. The bottom synchronizer ring 30b rests on the spacer ring 24. The central axle 15 includes th...

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PUM

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Abstract

A self-locking chuck for engaging the hollow core of a tubular roll of material includes a center trunnion having a central axis of rotation and a plurality of flat peripheral surfaces. A rotatable cage surrounds the trunnion and has a plurality of apertures in which moveable lug members are loosely retained. Each of the moveable lug members has an outer surface for engaging the inside of the hollow core and an inner arcuate surface defining a radial space opposite each flat peripheral surface portion of the trunnion. A plurality of cylindrical rollers extend through the radial space between each of the moveable lug members and each respective flat peripheral surface. In response to torque applied to the chuck, the cage rotates, forcing the rollers to move along the flat surfaces so as to bear against the inner lug surfaces. This creates a camming action which operates in either direction causing the chuck to self lock by forcing the lugs radially outwardly to engage the inside of a hollow core.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] Not Applicable. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable. REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX [0003] Not Applicable. BACKGROUND OF THE INVENTION [0004] The following invention relates to a chuck for engaging the hollow core of a roll or web of material. Large rolls of material, such as paper webs, are often handled by placing the roll on a chuck or mandrel. Often however, there is slippage between the inner hollow core of the roll and the chuck. In the past, means have been devised to cause the chuck to expand from the inside to apply more friction to the inner core of the roll. Such devices have included expansible jaws under control of some pneumatic or mechanical system. Other types of chucks use self-expanding surfaces. The expansion is created by a slip ring operating a lever or cam, but requires precisely controllable curved surfac...

Claims

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Application Information

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IPC IPC(8): B65H16/02B65H16/06B65H16/10B65H18/02
CPCB65H16/06B65H16/103B65H18/028B65H75/242B65H75/247
Inventor STOLYAR, SEMIONTRAIN, MICHAEL D.
Owner TIDLAND