Centering clamping device

Abstract

The invention discloses a centring clamping device which comprises a base, a clamping module and a driving module, wherein the base comprises a base body; the base body is provided with a central shaft; the clamping module comprises two first clamping jaw units arranged oppositely and two second clamping jaw units arranged oppositely; each of the first clamping jaw units is provided with a first clamping jaw; each of the second clamping jaw units is provided with a second clamping jaw; the driving unit comprises a first rotary disc, a second rotary disc, two first driving units and two second driving units; the first driving units drive the first rotary disc to drive the first clamping jaws of the first clamping jaw units to move in the direction of the central shaft; and the second driving units drive the second rotary disc to drive the second clamping jaws of the second clamping jaw units to move in the direction of the central shaft, so that a workpiece is clamped and fixed on the central shaft by means of the first clamping jaws and the second clamping jaws.

Description

technical field [0001] The invention relates to a workpiece clamping device, in particular to a centering clamping device. Background technique [0002] like figure 1 , 2 As shown, an existing centering clamping device 1 includes a mandrel 11, two turntables 12 superimposed and pivoted on the mandrel 11, and four cylinders arranged on the mandrel 11 and capable of driving the turntable 12 to rotate 13. Four movable claws 14, and four guide blocks 15 respectively connected to the movable claws 14, each turntable 12 has two eccentric arc grooves 121 respectively arranged at both ends and symmetrical to each other, the turntable The center of circle 12 is the symmetry point of the eccentric arc groove 121, the movable claws 14 are arranged in pairs, and one end of the guide block 15 connected to the two oppositely arranged movable claws 14 One end of the guide block 15 connected to the other two opposite movable claws 14 will slide in the eccentric arc groove 121 of the othe...

AI Technical Summary

Problems solved by technology

[0005] During operation, the first worm gear motor 242 and the second worm gear motor jointly drive the first large toothed disc 241 to rotate with rotating gears, and the first large toothed disc 241 drives the first and second sliders 243 with a gear set. , 244 move relatively, so that the first and second jaws 221, 222 arranged on the first and second sliders 243, 244 move relatively, and the third worm motor 252 and the fourth worm motor work together Drive the second large toothed disc 251 to rotate with the rotating teeth, and the second large toothed disc 251 drives the third and fourth sliders 253, 254 to move relatively with the gear set, so that the third and fourth sliders 253, 254 are arranged on the third and fourth sliders 253, The third and fourth jaws 231, 232 on 254 move relatively, so that a workpiece to be processed can be positioned at the center position. However, because the worm motor is expensive and bulky, in addition, the When the first worm motor 242 and the second worm motor drive the first large toothed disc 241 with rotating gears, it is easy to cause the rotating teeth meshing with the first large toothed disc 241 to have broken teeth due to asynchronous actuation. In the same way, it can be seen that the third worm motor 252 and the fourth worm motor also have the same problem when driving the second large toothed disc 251 with rotating gears. Therefore, the existing centering device 2 not only takes up more space, but also Fragile and not easy to maintain

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