CN113878518A

CN113878518A - Self-adaptive workpiece clamping device

Info

Publication number: CN113878518A
Application number: CN202111226804.XA
Authority: CN
Inventors: 聂松辉; 杨震; 李鹏程; 刘俊涛; 曹朦; 马劲; 邱爱红
Original assignee: Xiangtan University
Current assignee: Xiangtan University
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-01-04
Anticipated expiration: 2041-10-21
Also published as: CN113878518B

Abstract

The invention discloses a self-adaptive workpiece clamping device which comprises a guide rail frame, a slider-crank mechanism and a spring clamping mechanism, wherein the slider-crank mechanism is arranged on the guide rail frame; the guide rail frame comprises a T-shaped frame, a connecting plate, a long guide rail and a reset baffle; the crank slider mechanism is arranged on the guide rail frame; the spring clamping mechanism is arranged on a sliding block in the crank sliding block mechanism; the invention has the advantages of simple and compact structure, low cost, reliable work, wide application range and the like.

Description

Self-adaptive workpiece clamping device

Technical Field

The invention relates to the field of research of clamp devices, in particular to research of a self-adaptive workpiece clamping device.

Background

The clamp design can not be separated in the mechanical manufacturing, the auxiliary time can be greatly shortened by the clamp technology, the labor productivity is improved, the processing cost is reduced, the processing precision is ensured, the processing quality is stabilized, and the technical requirements and the labor intensity for workers are reduced. On the other hand, the design of the clamp is influenced by the product structure and technical requirements, and different products need to be designed and customized according to the appearance characteristics of the products, so that the design and manufacturing cost is increased.

Disclosure of Invention

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a self-adaptive workpiece clamping device, which comprises a guide rail frame, a slider-crank mechanism and a spring clamping mechanism;

the guide rail frame comprises a T-shaped frame, a connecting plate, a long guide rail and a reset baffle; the connecting plate is fixed on the T-shaped frame by bolts, the long guide rail is fixed on the bottom surface of the T-shaped frame by bolts, and the 2 reset baffles are respectively fixed at two ends of the long guide rail by bolts;

the crank sliding block mechanism comprises a spline shaft sleeve, a crank, a connecting rod, a driven sliding block and a round hole lock slot plate; the spline shaft sleeve 2 is clamped at the end part of the connecting plate, the large end of the crank is fixed on the spline shaft sleeve by a bolt, one end of the connecting rod is hinged with the small end of the crank, the driven sliding block is hinged with the other end of the connecting rod, and the driven sliding block is arranged on the long guide rail to form a moving pair; the circular hole locking groove plate is fixed on the side surface of the driven sliding block by a bolt;

the spring clamping mechanism comprises a sleeve, a clamp sliding block, a short guide rail, a limiting column, a clamp body and a spring; the short guide rail is fixed on the bottom surface of the driven slide block by using a screw, and the clamp slide block is arranged on the short guide rail to form a moving pair; the sleeve is fixed on the bottom surface of the clamp sliding block by a bolt; the limiting column is arranged on the sleeve, the ball head part of the limiting column is clamped in the groove hole of the round hole lock groove plate, the clamp body is arranged in the sleeve, and the spring is arranged between the sleeve and the clamp body;

the 2 sets of crank sliding block mechanisms and the 2 sets of spring clamping mechanisms are symmetrically arranged on the guide rail frame from left to right;

drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is an isometric view of a guide rail bracket of the present invention;

FIG. 3 is an isometric view of the slider-crank mechanism of the present invention;

FIG. 4 is an isometric view of the spring clamping mechanism of the present invention;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in the attached drawings: the invention comprises a guide rail frame 1, a slider-crank mechanism 2 and a spring clamping mechanism 3;

the guide rail frame 1 comprises a T-shaped frame 101, a connecting plate 102, a long guide rail 103 and a reset baffle 104; the connecting plate 102 is fixed on the T-shaped frame 101 through bolts, the long guide rail 103 is fixed on the bottom surface of the T-shaped frame 101 through bolts, and the 2-reset baffle plates 104 are respectively fixed at two ends of the long guide rail 103 through bolts;

the crank slider mechanism 2 comprises a spline shaft sleeve 201, a crank 202, a connecting rod 205, a driven slider 204 and a circular hole lock slot plate 203; the spline shaft sleeve 201 is clamped at the end part of the connecting plate 102, the large end of the crank 202 is fixed on the spline shaft sleeve 201 by a bolt, one end of the connecting rod 205 is hinged with the small end of the crank 202, the driven sliding block 204 is hinged with the other end of the connecting rod 205, and the driven sliding block 204 is arranged on the long guide rail 103 to form a moving pair; the circular hole lock slot plate 203 is fixed on the side surface of the driven sliding block 204 by bolts;

the spring clamping mechanism 3 comprises a sleeve 301, a clamp sliding block 302, a short guide rail 303, a limiting column 304, a clamp body 305 and a spring 306; the short guide rail 303 is fixed on the bottom surface of the driven slide block 204 by a screw, and the clamp slide block 302 is arranged on the short guide rail 303 to form a moving pair; the sleeve 301 is fixed on the bottom surface of the clamp sliding block 302 by bolts; the limiting column 304 is arranged on the sleeve 301, the ball head part of the limiting column 304 is clamped in the slotted hole of the round-hole lock slot plate 203, the clamp body 305 is arranged in the sleeve 301, and the spring 306 is arranged between the sleeve 301 and the clamp body 305;

the 2 sets of crank sliding block mechanisms 2 and the 2 sets of spring clamping mechanisms 3 are symmetrically arranged on the guide rail frame 1 from left to right;

the working principle of the invention is as follows: the device is in an initial state: the limiting column 304 on the spring clamping mechanism 3 is automatically clamped in the groove hole at the innermost side of the round hole lock groove plate 203, the sleeve 301 is attached to the reset baffle 104, and the spring 306 is in a small pre-compression state; clamping: the motor drives 2 cranks 202 to swing oppositely, the crank slide block mechanism 2 drives 2 driven slide blocks 204 to move oppositely, the 2 driven slide blocks 204 drive 2 clamp bodies 305 in the spring clamping mechanism 3 to move oppositely so as to clamp a workpiece, and the motor stops working after the driven slide blocks 204 reach the extreme position; self-adaptation of workpiece length: when the workpiece is a workpiece with the minimum length, after the driven sliding block 204 reaches the extreme position, the 2-spring 306 compression amount of the spring clamping mechanism 3 is close to the maximum, the restoring force of the 2-spring 306 is smaller than the limiting force between the limiting column 304 and the circular hole lock groove plate 203, and the 2-clamp body 305 clamps the workpiece; along with the increase of the length of a workpiece, in the process that 2 clamp bodies 305 move in opposite directions, after the compression amount of a spring 306 is larger than the maximum compression amount, when the generated restoring force is larger than the limiting force between a limiting column 304 and a circular hole lock groove plate 203, the limiting column 304 retracts, the limiting column 304 is separated from an original groove hole of the circular hole lock groove plate 203, and a sleeve 301 moves back and forth under the action of the restoring force until the limiting column 304 is clamped in the next groove hole of the circular hole lock groove plate 203 and the spring 306 restores; according to the length of the workpiece, the limiting column 304 can be automatically clamped in the slotted holes at different positions in the round-hole slot locking plate 203, so that the self-adaptive clamping of the length of the workpiece is completed; and (3) return stroke: the motor drives the 2 cranks 202 to swing back to back in a reverse direction, so that the driven sliding block 204 and the circular hole lock slot plate 203 return and drive the spring clamping mechanism 3 to return, meanwhile, the reset baffle 104 pushes the sleeve 301, the limiting column 304 is clamped in the innermost slotted hole of the circular hole lock slot plate 203, and the device returns to the initial state.

Claims

1. An adaptive workpiece clamping device is characterized in that: the invention comprises a guide rail frame, a crank slide block mechanism and a spring clamping mechanism; the guide rail frame comprises a T-shaped frame, a connecting plate, a long guide rail and a reset baffle; the connecting plate is fixed on the T-shaped frame through bolts, the long guide rail is fixed on the bottom surface of the T-shaped frame through bolts, and the 2 reset baffles are respectively fixed at two ends of the long guide rail through bolts.

2. An adaptive workpiece clamping device according to claim 1, characterised in that: the crank sliding block mechanism comprises a spline shaft sleeve, a crank, a connecting rod, a driven sliding block and a round hole lock slot plate; the spline shaft sleeves 2 are respectively clamped at the end parts of the connecting plates, the big end of the crank is fixedly arranged on the spline shaft sleeves, one end of the connecting rod is hinged with the small end of the crank, the driven sliding block is hinged with the other end of the connecting rod, and the driven sliding block is arranged on the long guide rail to form a moving pair; the circular hole locking slot plate is fixedly arranged on the side surface of the driven sliding block.

3. An adaptive workpiece clamping device according to claim 1, characterised in that: the spring clamping mechanism comprises a sleeve, a clamp sliding block, a short guide rail, a limiting column, a clamp body and a spring; the short guide rail is fixed on the bottom surface of the driven slide block, and the clamp slide block is arranged on the short guide rail to form a moving pair; the sleeve is fixedly arranged on the bottom surface of the clamp sliding block; the limiting column is arranged on the sleeve, the ball head part of the limiting column is clamped in the groove hole of the round hole lock groove plate, the clamp body is arranged in the sleeve, and the spring is arranged between the sleeve and the clamp body.

4. An adaptive workpiece clamping device according to claim 1, characterised in that: the 2 sets of crank sliding block mechanisms and the 2 sets of spring clamping mechanisms are symmetrically arranged on the guide rail frame from left to right.