Pneumatic clamping and self-locking device and method for clamping workpieces by using same

Abstract

The invention discloses a pneumatic clamping and self-locking device and a method for clamping workpieces by using the same. The pneumatic clamping and self-locking device comprises an air cylinder fixed below a positioning seat, wherein the positioning seat is provided with a through hole; one end of a first connecting rod penetrates through the through hole and is in threaded connection with the air cylinder; the other end of the first connecting rod is connected with one end of a second connecting rod through a threaded pin; the other end of the second connecting rod is connected with one end of a third connecting rod through a threaded pin; the other end of the third connecting rod is in clearance fit with a hole on the positioning seat; a turning press plate is in threaded connection with square tenon clamping blocks at two sides of the turning press plate for clamping extending ends at two sides of the third connecting rod; the first connecting rod, the second connecting rod and the third connecting rod do a four-link motion; and a press head for clamping workpieces is arranged at the front end of the turning press plate. According to the pneumatic clamping and self-locking device with the structure, the clamping reliability is ensured and unexpected accidents caused by emergency are avoided; meanwhile, the whole four-link mechanism is designed in the positioning seat so as to avoid the damage to the clamping device, caused by welding splashing matters.

Description

technical field [0001] The invention relates to a pneumatic clamping self-locking device, in particular to a kind of assembly for some special parts on automobiles. Background technique [0002] In the assembly process of auto parts, the pneumatic flip clamping mechanism is generally used, but the common pneumatic flip clamping mechanism has obvious defects in the assembly process of some special parts, such as: for the spring assembly of the car seat, the glass assembly , Welding assembly and other production processes, in case of maintenance equipment, shift change, sudden power failure, etc., the gas source will be automatically cut off. For the ordinary pneumatic flip clamping mechanism, cutting off the air source will cause the clamping mechanism to automatically loosen or have no clamping force. And this phenomenon will cause the unassembled spring to pop out during the spring assembly process of the seat, thereby damaging the equipment or injuring the operator; it wi...

AI Technical Summary

Problems solved by technology

[0002] In the assembly process of auto parts, the pneumatic flip clamping mechanism is generally used, but the common pneumatic flip clamping mechanism has obvious defects in the assembly process of some special parts, such as: for the spring assembly of the car seat, the glass assembly , Welding assembly and other production processes, in case of maintenance equipment, shift changes, sudden power outages, etc., the gas source will be automatically cut off

For ordinary pneumatic flip clamping mechanism, cutting off the air source will make the clamping mechanism automatically loosen or have no clamping force

And this phenomenon will cause

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