CN201950231U

CN201950231U - Worm Gear Self-Centering Chuck

Info

Publication number: CN201950231U
Application number: CN2010206682143U
Authority: CN
Inventors: 李东栓
Original assignee: Dalian Sida High Technology Development Co Ltd
Current assignee: Dalian Sida High Technology Development Co Ltd
Priority date: 2010-12-20
Filing date: 2010-12-20
Publication date: 2011-08-31
Anticipated expiration: 2020-12-20

Abstract

The utility model provides a worm gear is from centering chuck, there is the base, install gyration drive bearing on the upper portion of base, it is equipped with the spheroid to be located gyration drive bearing upper portion intermediate position, the spheroid is located on the top surface identical with the spheroid surface on base top, the spheroid connects the cylinder, this cylinder has the terminal surface, be equipped with circumference evenly distributed's jack catch on gyration drive bearing, it is identical through the helix between every jack catch and the helix revolving stage, the helix revolving stage connects the worm wheel in the gyration drive bearing, the inner end of jack catch has the sphere identical with the spheroid. When the device is used, a plurality of groups of devices are arranged according to the shape of a workpiece, the workpiece is located on the end face of each sphere, the face can deflect along with the appearance of the workpiece, the driving bearing is rotated to enable each clamping jaw to move inwards, the spherical surface abuts against the sphere, the locking and positioning effects are achieved on the sphere, and the workpiece is supported stably. The locking screw may further lock the jaws by tightening the back cap. The device has good stability of supporting the workpiece, and is safe and reliable.

Description

The worm and gear self-centering chuck

Technical field

The utility model relates to a kind of chuck, and particularly a kind of worm and gear self-centering chuck is mainly used in the support large-scale workpiece.

Background technology

The supporting mechanism of large-scale workpiece comprises a plurality of pedestals, on each pedestal, be equipped with supporting surface, workpiece directly is seated on each supporting surface, this supporting way, cause workpiece supported support place in the outside not necessarily to contact with supporting surface well, mainly be that supporting surface can't be with workpiece rotational angle, poor stability.

Summary of the invention

The purpose of this utility model provides the worm and gear self-centering chuck that certain deflection, supporting workpiece good stability can take place with workpiece a kind of supporting surface, overcomes the deficiencies in the prior art.

Worm and gear self-centering chuck of the present utility model, pedestal is arranged, on the top of pedestal rotary drive shaft being installed holds, being positioned at rotary drive shaft holds upper middle position and is provided with spheroid, on the end face that matches with outer surface of spheroid that spheroid is seated in the pedestal top, spheroid connects cylinder, this cylinder has end face, on holding, rotary drive shaft is provided with the equally distributed claw of circumference, match by helix between each claw and the helix turntable, the helix turntable takes back the worm gear that changes in the driving bearing, and the inner termination of claw 9 has the sphere 12 that matches with spheroid 13.

Worm and gear self-centering chuck of the present utility model is provided with tie down screw between shell that wherein said rotary drive shaft is held and the claw.

Worm and gear self-centering chuck of the present utility model, shape according to workpiece during use is provided with many these devices of group, spheroid workpiece is seated on the end face on each spheroid, utilizes the end face supporting workpiece, owing to can deflect with respect to pedestal, cause the end face can be with the deflection of workpiece profile, can utilize rotary drive shaft to hold after the support each claw is moved inward, lean spheroid and fixing simultaneously, also can utilize tie down screw further to lock, the supporting workpiece good stability, safe and reliable.

Description of drawings

Fig. 1 is the structural representation of the utility model specific embodiment.

The specific embodiment

As shown in Figure 1: 1 is pedestal, on the top of pedestal 1 rotary drive shaft of choosing being installed holds, this rotary drive shaft is contracted and is drawn together worm screw 4, the worm gear 2 that is meshed with worm screw 4 that joins with motor and the rotary drive shaft that covers on worm screw 4, worm gear 2 outsides held shell 3, and wherein worm gear 2 is sleeved on the top of pedestal 1.On the sphere that matches with spheroid 13 that spheroid 13 places pedestal 1 upper end.Connect cylinder above spheroid 13, there is end face 14 this cylinder upper end.Spheroid 13 just is positioned at rotary drive shaft and holds upper middle position.

Circumference evenly offers three openings on rotary drive shaft is held shell 3, and claw 9 is set in each opening, and there is helix the bottom surface of each claw 9.Be connected with connecting ring 5 by key or tooth above worm gear 2, the top of connecting ring 5 is connected with helix turntable 11 by key or tooth, is processed with helix above the helix turntable 11, and the helix of this helix and claw 9 bottom surfaces matches.

The inner termination of every upper clipping claw 9 is processed with the sphere 12 that matches with spheroid 13.

Rotary drive shaft hold above be installed with loam cake 10 by screw.

The port that is positioned at opening on the shell 3 that rotary drive shaft is held is fixed with fixed cover 8, and tie down screw 6 passes fixed cover 8, and the inner termination of tie down screw 6 is fixedlyed connected with claw 9 screw threads, and back of the body cap 7 has been threaded on tie down screw 6.

Shape according to workpiece during use is provided with many these devices of group, workpiece is seated on the end face 14 on each spheroid 13, utilize end face 14 supporting workpieces, because spheroid 13 can deflect with respect to pedestal 1, cause the end face 14 can be with the deflection of workpiece profile, can utilize rotary drive shaft to hold after the support each claw 9 is moved inward, it is driven by motor worm screw 4, worm gear 2 rotates, worm gear 2 drives connecting ring 5, helix turntable 11 rotates, and helix turntable 11 drives claw 9 by helix and moves, after workseat drops on the end face 14, claw 9 moves inward, sphere is leaned on spheroid 13, spheroid 13 has been played the effect of locking positioning, make its supporting workpiece stable.Also can utilize tighten the back of the body cap 7 make tie down screw 6 further lock dog 9.This device supporting workpiece good stability, safe and reliable.

Claims

1. A self-centering chuck for worm gears and worms, characterized in that: there is a base (1), a rotary drive bearing is installed on the upper part of the base (1), and a ball (13) is arranged at the middle position of the upper part of the rotary drive bearing , the sphere (13) is located on the top surface of the top of the base (1) matching the outer surface of the sphere (13), the sphere (13) is connected to the cylinder, the cylinder has an end surface (14), and the rotary drive bearing is set There are claws (9) evenly distributed on the circumference, each claw (9) matches the helical turntable (11) through a helix, and the helical turntable (11) is connected to the worm wheel (2) in the rotary drive bearing, The inner end of the claw (9) has a spherical surface (12) matching the spheroid (13).

2. The self-centering chuck for worm gears and worms according to claim 1, characterized in that: a locking screw (6) is provided between the shell (3) of the rotary drive bearing and the claw (9).