CN209986572U

CN209986572U - Automatic centering self-locking type clamping mechanism

Info

Publication number: CN209986572U
Application number: CN201920416868.8U
Authority: CN
Inventors: 单健
Original assignee: Dalian Zhengye Precision Machinery Co Ltd
Current assignee: Dalian Zhengye Precision Machinery Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-01-24
Anticipated expiration: 2029-03-29

Abstract

The utility model discloses an automatic centering self-locking type clamping mechanism, which comprises a box body, wherein a driving tooth is supported in the box body in a rotating way and is connected with a rotating shaft key, the end part of the rotating shaft is positioned outside the box body, a first guide rod which is longitudinally distributed is movably connected in the box body, the top part of the first guide rod is connected with a bracket, the end part of the bracket is rotatably connected with an upper clamping jaw through a pin shaft, a guide groove is arranged on the first guide rod, a limit pin shaft which is fixedly arranged on the box body is movably connected in the guide groove, a second guide rod which is longitudinally distributed is also movably connected in the box body, the top part of the second guide rod is connected with a lower clamping jaw through an adjusting and connecting mechanism, a guide groove is also arranged on the second guide rod, a limit pin shaft which is fixedly arranged on the box body is movably connected in the guide groove, the first guide rod and the, and the first guide rod and the second guide rod are respectively provided with a rack part meshed with the driving teeth.

Description

Automatic centering self-locking type clamping mechanism

Technical Field

The utility model relates to an anchor clamps, especially an automatic centering are from locking-type clamping mechanism.

Background

In the processing process of the existing shaft and blank parts, because the position of a main shaft of a machine tool is fixed, in order to ensure the consistency of the processing allowance of the parts and the consistency of the wall thickness of the processed parts, if single-side positioning and single-side clamping are adopted, the deviation of the central axis of the shaft part is easily caused, and then the condition of inconsistent processing allowance is generated, and the use performance is influenced. And for longer shaft parts, at least two sets of clamps are required to clamp the shaft parts together, and the accuracy of the central axis of the clamped parts is also required to be ensured. However, in actual work, a certain deviation inevitably exists between two different clamps in the installation process, which may cause the central axis of the clamped part to shift or incline, and thus may affect the machining quality. There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The utility model relates to a solve the above-mentioned not enough that prior art exists, provide a simple structure, design benefit can realize the automatic centering's of blank part locate function and press from both sides tight function, simultaneously through inclined plane locking, eliminate the potential safety hazard, guarantee machining precision's clamping mechanism.

The technical solution of the utility model is that: the utility model provides an automatic centering is from locking-type clamping mechanism, includes box 1, its characterized in that: the box body 1 is rotatably supported with a driving tooth 2, the driving tooth 2 is in key connection with a rotating shaft, the end part of the rotating shaft is positioned outside the box body 1, a first guide rod 3 which is longitudinally distributed is movably connected in the box body 1, the top part of the first guide rod 3 is connected with a bracket 4, the end part of the bracket 4 is rotatably connected with an upper clamping jaw 6 through a pin shaft 5, the first guide rod 3 is provided with a guide groove 7, the guide groove 7 is movably connected with a limit pin shaft 8 which is fixedly arranged on the box body 1, the box body 1 is also movably connected with a second guide rod 9 which is longitudinally distributed, the top part of the second guide rod 9 is connected with a lower clamping jaw 11 through an adjusting and connecting mechanism 10, the second guide rod 9 is also provided with a guide groove 7, the guide groove 7 is movably connected with a limit pin shaft 8 which is fixedly arranged on the box body 1, the first guide rod 3 and the second guide rod 9 are respectively positioned at two, the first guide bar 3 and the second guide bar 9 are provided with rack portions engaged with the driving teeth 2,

the upper clamping jaw 6 and the lower clamping jaw 11 are both provided with a V-shaped clamping part 12, the centers of the upper clamping jaw 6 and the lower clamping jaw 11 are also provided with a clamping notch 13,

a horizontal limiting pin 14 capable of horizontally reciprocating is further arranged in the box body 1, the horizontal limiting pin 14 is driven by oil pressure, a first limiting surface which is distributed in an inclined manner is arranged at the end head of the horizontal limiting pin 14, a limiting groove 15 is formed in the second guide rod 9, the top end surface of the limiting groove 15 is a second limiting surface matched with the first limiting surface,

adjusting connection mechanism 10 includes Z axle adjusting pad 16, Z axle adjusting pad 16 passes through bolt fixed connection on the top of second guide bar 9 with Z axle installation piece 17 to Z axle adjusting pad 16 is located between Z axle installation piece 17 and the second guide bar 9, still is connected with X axle installation piece 19 through horizontal bolt 18 on Z axle installation piece 17, be provided with X axle adjusting pad 20 between X axle installation piece 19 and the second guide bar 9, just X axle installation piece 19 also links to each other with second guide bar 9 through the bolt with X axle adjusting pad 20, lower clamping jaw 11 is connected on Z axle installation piece 17.

Compared with the prior art, the utility model, have following advantage:

the automatic centering self-locking type clamping mechanism with the structure is simple in structure, ingenious in design and reasonable in layout, and a special structure is designed for solving various problems existing in the traditional clamping mechanism in the clamping operation of a blank of a bar. Its last clamping jaw can freely swing, and the tight design of clamp of V type notch form of clamping jaw about the cooperation is let this mechanism when pressing from both sides tight bar, can let bar automatic adjustment gesture in order to guarantee to realize good contact between clamping jaw and the bar, and it can also finely tune the axis of bar in the certain limit simultaneously to when using two this mechanisms to carry out the clamp of bar, guarantee the accuracy that the bar axis distributes. In consideration of safety, the horizontal limiting pin with the inclined plane is further arranged, the inclined plane on the limiting pin is matched with the inclined plane in the limiting groove on the guide rod, mechanical locking can be achieved, and potential safety hazards are eliminated. And the clamping mechanism has simple manufacturing process and low manufacturing cost, so the clamping mechanism has multiple advantages, is particularly suitable for popularization and application in the field, and has very wide market prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a portion of an adjusting and connecting mechanism according to an embodiment of the present invention.

Detailed Description

The following description will explain embodiments of the present invention with reference to the drawings. As shown in fig. 1 and 2: an automatic centering self-locking type clamping mechanism comprises a box body 1, wherein a driving tooth 2 is rotatably supported in the box body 1, the driving tooth 2 is connected with a rotating shaft in a key mode, the end part of the rotating shaft is positioned outside the box body 1, a first guide rod 3 which is longitudinally distributed is movably connected in the box body 1, the top part of the first guide rod 3 is connected with a support 4, the end part of the support 4 is rotatably connected with an upper clamping jaw 6 through a pin shaft 5, a guide groove 7 is formed in the first guide rod 3, a limit pin shaft 8 which is fixedly arranged on the box body 1 is movably connected in the guide groove 7, a second guide rod 9 which is longitudinally distributed is also movably connected in the box body 1, the top part of the second guide rod 9 is connected with a lower clamping jaw 11 through an adjusting and connecting mechanism 10, a guide groove 7 is also formed in the second guide rod 9, and a limit pin shaft 8 which is fixedly arranged on the box body 1, the first guide rod 3 and the second guide rod 9 are respectively positioned at two sides of the driving teeth 2, the first guide rod 3 and the second guide rod 9 are both provided with rack parts engaged with the driving teeth 2,

The utility model discloses automatic centering is as follows from locking-type clamping mechanism's working process: firstly, arranging two clamping mechanisms, and placing a rod-shaped workpiece to be processed on the two clamping mechanisms, namely clamping the rod-shaped workpiece by using the two clamping mechanisms together; in an initial state, a workpiece is supported by the lower clamping jaw 11, and two parallel contact lines exist between two inclined planes of the V-shaped clamping part 12 on the lower clamping jaw 11 and the workpiece;

then, a driving motor is connected with a rotating shaft connected with the driving teeth 2 through a transmission pair, the motor is started, the driving rotating shaft drives the driving teeth 2 to rotate, when the driving teeth 2 rotate, on one hand, the first guide rod 3 is driven to descend through a rack part, and finally, the upper clamping jaw 6 is driven to descend, after the V-shaped clamping part 12 on the upper clamping jaw 6 is contacted with the outer wall of a rodlike workpiece, because the upper clamping jaw 6 can freely swing, the angle between the upper clamping jaw and the vertical direction can be automatically adjusted, so that two inclined planes of the V-shaped clamping part 12 on the upper clamping jaw 6 are ensured to be contacted with the workpiece at the same time, namely two parallel contact lines also exist between the two;

on the other hand, the driving teeth 2 can drive the second guide rod 9 to move upwards through the rack part, and the upper clamping jaw and the lower clamping jaw move oppositely to clamp the rod-shaped workpiece;

in the clamping process, under the action of the four inclined planes, the rod-shaped workpiece can automatically adjust the position of the central axis of the rod-shaped workpiece, so that automatic centering is realized;

after clamping, hydraulic oil is filled into the cavity where the horizontal limiting pin 14 is located through an oil pressure system, pressure is maintained, the horizontal limiting pin 14 is in a locking state, and the first limiting surface on the horizontal limiting pin 14 and the second limiting surface on the second guide rod 9 are attached to each other, so that the degree of freedom of the second guide rod 9 in the longitudinal direction can be limited after the horizontal limiting pin 14 is positioned; the locking of the whole clamping action is realized, so that the safety in the processing process is ensured;

if certain errors exist in the installation of the two clamping mechanisms, and the axial line of the workpiece is inclined after the two clamping mechanisms simultaneously clamp the workpiece, the clamping mechanism can be adjusted by installing the Z-axis adjusting pad 16 and the X-axis adjusting pad 20 with different thicknesses, generally, the diameter of the threaded hole is slightly larger than the outer diameter of the bolt, so that the change of the thickness of the Z-axis adjusting pad 16 or the X-axis adjusting pad 20 can cause slight relative position change between the bolt and the threaded hole, and the specific position of the lower clamping jaw 11 can be adjusted within a bearable range, so as to ensure that the axial line of the workpiece is coincident with or parallel to a standard machining axial line.

The clamp can also clamp a plate-shaped workpiece, and the side edge of the plate-shaped workpiece is clamped in the clamping notches 13 of the upper clamping jaw 6 and the lower clamping jaw 11, so that the workpiece can be clamped.

Claims

1. The utility model provides an automatic centering is from locking-type clamping mechanism, includes box (1), its characterized in that: the box body (1) is rotatably supported with driving teeth (2), the driving teeth (2) are connected with a rotating shaft key, the end part of the rotating shaft is positioned outside the box body (1), a first guide rod (3) which is longitudinally distributed is movably connected in the box body (1), the top part of the first guide rod (3) is connected with a support (4), the end part of the support (4) is rotatably connected with an upper clamping jaw (6) through a pin shaft (5), a guide groove (7) is arranged on the first guide rod (3), a limit pin shaft (8) which is fixedly arranged on the box body (1) is movably connected in the guide groove (7), a second guide rod (9) which is longitudinally distributed is also movably connected in the box body (1), the top part of the second guide rod (9) is connected with a lower clamping jaw (11) through an adjusting and connecting mechanism (10), and a guide groove (7) is also arranged on the second guide rod (9), a limit pin shaft (8) fixedly arranged on the box body (1) is movably connected in the guide groove (7), the first guide rod (3) and the second guide rod (9) are respectively positioned at two sides of the driving teeth (2), the first guide rod (3) and the second guide rod (9) are respectively provided with a rack part meshed with the driving teeth (2),

the upper clamping jaw (6) and the lower clamping jaw (11) are both provided with V-shaped clamping parts (12), the centers of the upper clamping jaw (6) and the lower clamping jaw (11) are also provided with clamping notches (13),

a horizontal limiting pin (14) capable of horizontally reciprocating is further arranged in the box body (1), the horizontal limiting pin (14) is driven through oil pressure, a first limiting surface which is distributed in an inclined mode is arranged at the end of the horizontal limiting pin (14), a limiting groove (15) is formed in the second guide rod (9), the top end surface of the limiting groove (15) is a second limiting surface matched with the first limiting surface,

adjusting connection mechanism (10) includes Z axle adjusting pad (16), Z axle adjusting pad (16) passes through bolt fixed connection on the top of second guide bar (9) with Z axle installation piece (17) to Z axle adjusting pad (16) are located between Z axle installation piece (17) and second guide bar (9), still are connected with X axle installation piece (19) through horizontal bolt (18) on Z axle installation piece (17), be provided with X axle adjusting pad (20) between X axle installation piece (19) and second guide bar (9), just X axle installation piece (19) and X axle adjusting pad (20) also link to each other with second guide bar (9) through the bolt, clamping jaw (11) are connected on Z axle installation piece (17) down.