CN209998790U

CN209998790U - self-centering clamp

Info

Publication number: CN209998790U
Application number: CN201920573213.1U
Authority: CN
Inventors: 汪东阳; 王家勇
Original assignee: Cowes Special Vehicle Bridge In Chengdu Manufactures Co Ltd
Current assignee: Cowes Special Vehicle Bridge In Chengdu Manufactures Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-31
Anticipated expiration: 2029-04-24

Abstract

The utility model relates to the technical field of machining, concretely relates to from centering anchor clamps, the technical scheme is that from centering anchor clamps, including the mount pad, the mount pad is equipped with the clamping jaw, the linkage chamber, linkage chamber upper end is established the second clamping jaw, clamping jaw lower extreme is connected with guide arm, guide arm is located the mount pad and is connected with the drive block, the middle part cover is equipped with reset spring, drive block is located linkage chamber lower extreme inside, the upper end is provided with the inclined plane, the second clamping jaw is connected with the second guide arm, the second guide arm is located linkage chamber upper end inside, end is connected with the second clamping jaw, end is connected with the second drive block in addition, the second drive block is located linkage chamber upper end inside, the lower extreme is provided with down inclined plane, by linear actuator drive, be provided with the linkage block between upper inclined plane and the lower inclined plane, the linkage block only can slide from top to bottom, the upper end supports and leans on at lower inclined plane, the lower extreme supports on at the inclined plane.

Description

self-centering clamp

Technical Field

The utility model relates to a machining technology field, concretely relates to kind from centering anchor clamps.

Background

The clamp mainly plays a role in clamping and fixing a part to be machined in the process of machining various parts, and is indispensable for machining parts with high position precision requirements, such as parts with circular arcs on the outer surfaces or regular polygons with sections of more than four sides, the parts are fixed and need to be centered to reduce machining errors and meet machining requirements.

SUMMERY OF THE UTILITY MODEL

Poor to above-mentioned current from centering fixture positioning accuracy, easy wearing and tearing are difficult to satisfy the technical problem that finish machining required, the utility model provides an are from centering fixture, can be from centering clamping workpiece, have positioning accuracy height, stand wear and tear characteristics.

The utility model discloses a following technical scheme realizes:

self-centering clamp comprises a mounting seat, wherein a th clamping jaw capable of sliding left and right is arranged at the end of the mounting seat , a linkage cavity is arranged at the end of , a second clamping jaw capable of sliding left and right is arranged at the upper end of the linkage cavity, the th clamping jaw and the second clamping jaw form a station for clamping a workpiece, a th guide rod is connected to the lower end of the th clamping jaw, the th guide rod is positioned in the mounting seat and capable of sliding left and right, the th end is connected with the th clamping jaw, a drive block is connected to the th end, a reset spring is sleeved in the middle of the th clamping jaw, the th drive block is positioned in the lower end of the linkage cavity, an upper inclined plane capable of tilting upwards at a forty-five degree angle is arranged at the left part of the mounting seat, the reset spring is in a compressed state when the clamp is maximally opened, the second clamping jaw is connected with a second guide rod, the second guide rod is positioned in the upper end of the linkage cavity and capable of sliding left and right, the th guide rod is connected with the second drive block, a lower inclined plane is positioned in the upper end of the linkage cavity, a lower inclined plane capable of sliding linearly tilting upwards and downwards, a lower inclined plane is arranged between the upper inclined plane and a lower inclined plane capable of sliding right tilting, a.

Preferably, the th clamping jaw is detachably connected with the th guide rod through a connecting body.

Preferably, the upper end of the connecting body is detachably connected with the th clamping jaw, the lower end of the connecting body is fixedly connected with the th guide rod through a connecting part, and the lower end face of the connecting body is attached to the upper end face of the mounting seat.

Preferably, the th clamping jaw and the second clamping jaw are flat-bottomed V-shaped, and each inclined surface is provided with a pressing block.

Preferably, the upper end of the linkage cavity is provided with a locking bolt facing the second guide rod.

Preferably, the upper end of the locking bolt is positioned outside the linkage cavity and is provided with a rotating hand wheel.

Preferably, the second driving block is horizontally provided with a guide groove, and the side wall of the linkage cavity is provided with a guide rail matched with the guide groove.

Preferably, the th guide rod is detachably connected with the th driving block, and the second guide rod is detachably connected with the second driving block.

Preferably, the linear actuator is a hydraulic cylinder.

Preferably, the output end of the linear driver is detachably connected with the second driving block.

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

1. compared with the prior art, the whole clamping process is finished by the plane pair, so that the clamping device is wear-resistant and has good repeatability.

2. When the linear driver moves, the reset spring can drive the clamping jaw to move leftwards synchronously, and in addition, enables the linkage block to be in a pressing state directly, but the clamping jaw and the second clamping jaw can be synchronous at any time, so that the positioning precision is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention, constitute a part of this application and do not constitute a limitation on embodiments of the invention, and in which:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of surface D-D of FIG. 1;

fig. 3 is a schematic view of the plane F-F of fig. 1.

Reference numbers and corresponding part names in the drawings:

1-mounting seat, 2- th clamping jaw, 3-linkage cavity, 4-second clamping jaw, 5- guide rod, 6- th driving block, 7-reset spring, 8-upper inclined plane, 9-second guide rod, 10-second driving block, 11-lower inclined plane, 12-linear driver, 13-linkage block, 14-connecting body, 15-connecting part, 16-pressing block, 17-locking bolt, 18-rotating hand wheel, 19-guide groove and 20-guide rail.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description of the present invention taken in conjunction with the examples and the accompanying drawings is steps, and the exemplary embodiments and the description thereof are only used for explaining the present invention, and are not intended to limit the present invention.

Examples

With reference to fig. 1 to 3, kinds of self-centering clamps include a mounting base 1 for mounting furniture, where the mounting base 1 is usually made of cast steel or cast iron, and is usually made of cast steel to ensure machining accuracy, and is directly mounted on a machine tool workbench or a bench when in use, a 1 end of the mounting base 1 is provided with a clamping jaw 2 capable of sliding left and right, another end is provided with a linkage cavity 3, and an upper end of the linkage cavity 3 is provided with a second clamping jaw 4 capable of sliding left and right, that is, the clamping jaw 2 is in sliding fit with the mounting base 1, the second clamping jaw 4 is in sliding fit with an upper end of the linkage cavity 3, and the clamping jaw 2 and the second clamping jaw 4 form a work station for clamping a workpiece, it can be understood that the clamping jaw 2 and the second clamping jaw 4 are moved toward each other to clamp a workpiece to be machined.

The upper end of the connecting body 14 is detachably connected with the clamping jaw 2, for example, the connecting body is in pin connection to enable the clamping jaw to be in a faster and different shape, the lower end of the connecting body 14 is fixedly connected with the 460 th guide rod 5 through the connecting body 15, the lower end of the connecting body 14 is in close contact with the upper end face of the mounting seat 1, it should be understood that the mounting seat 1 is provided with the common connecting body 15, the lower end of the connecting body 14 is provided with the common connecting body 15, so that the lower end of the connecting body 14 is in close contact with the upper end face of the mounting seat 1, the connecting body is provided with the th guide rod 5, the guide rod 5966 th guide rod 5 is positioned in the mounting seat 1 and can slide left and right, namely, the th guide rod 5 is in sliding fit with the inside of the mounting seat 1, and the th guide rod 5 is connected with the th guide jaw 2 at the end, in a pin connection and a screw connection manner, in order to ensure that the clamping center position of the th clamping jaw 2 and the clamping center of the second clamping jaw 4 is positioned in the same horizontal plane as .

Correspondingly, the second clamping jaw 4 is connected with a second guide rod 9, similarly, the second clamping jaw 4 can also be connected with the second guide rod 9 through a pin joint mode so as to replace the clamping jaw, the second guide rod 9 is positioned in the upper end of the linkage cavity 3 and can slide left and right, the end is connected with the second clamping jaw 4, the other end is connected with a second driving block 10, the second guide rod 9 is detachably connected with the second driving block 10, the second driving block 10 is positioned in the upper end of the linkage cavity 3, the left part of the lower end of the linkage cavity is provided with a lower inclined surface 11 inclined downwards by forty-five degrees and is driven to move left and right by a linear driver 12, the linear driver 12 can be a linear motor, an electric push rod, a screw rod mechanism driven by the motor, a hydraulic/pneumatic cylinder and the like, and is preferably a hydraulic cylinder, the output torque is large, the control is simple, the output end of the linear driver 12 is detachably connected with the second driving block 10, the output end of the linear driver 12 is generally connected with the second driving block 10 in a detachable mode, a pin joint mode is adopted, the second clamping guide block 19 is arranged in a pin joint mode, and a guide groove 19 is arranged in the guide groove 19, so as to improve the horizontal moving precision of the clamping jaw 3 and further improve the horizontal deflection of the guide groove in the horizontal deflection process.

The linkage block 13 is arranged between the upper inclined surface 8 and the lower inclined surface 11, the linkage block 13 can only slide up and down, the upper end of the linkage block 13 abuts against the lower inclined surface 11 and is provided with an inclined surface matched with the lower inclined surface 11, the lower end of the linkage block abuts against the upper inclined surface 8 and is provided with an inclined surface matched with the upper inclined surface 8, specifically, the upper end surface of the linkage block 13 and the lower inclined surface 11 form a plane pair, the lower end surface of the linkage block and the upper inclined surface 8 form a plane pair, a structure for enabling the linkage block 13 to slide up and down is arranged in the linkage cavity 3 to prevent the linkage block 13 from deflecting, the structure can be a partition plate arranged between the second driving block 6 and the second driving block 10 and provided with a through hole matched with the horizontal section of the linkage block 13, or a bulge arranged on the side wall of the linkage cavity 3, the part of the bulge between the -th driving block 6 and the second driving block 10 is provided with a notch or a through hole matched with the horizontal section of the linkage block 13, when the second driving block 10 moves left, the linkage block 13 moves down, the linkage block 13 moves, the second driving block 13 moves synchronously with the right inclined surface, the inclination angle 636 moves, and the second driving block moves synchronously with the second driving block 35, and the inclination angle is equal to achieve the synchronous movement accuracy, and the synchronous positioning accuracy of the.

, the clamping jaw 2 and the second clamping jaw 4 are flat-bottomed V-shaped, each inclined surface is provided with a pressing block 16, the V-shaped clamping jaws are arranged in a V shape, the workpiece can be prevented from deflecting when being clamped, the pressing blocks 16 are arranged on the V-shaped flat bottoms and the inclined surfaces, six point positions are stressed when the workpiece is clamped, and clamping is more reliable, the upper end of the linkage cavity 3 is provided with a locking bolt 17 which is over against the second guide rod 9, the second guide rod 9 can be locked, the workpiece is prevented from jumping due to unstable torque output by the linear driver 12 in the machining process, the operation of the locking bolt 17 is convenient, and the upper end of the locking bolt 17 is positioned outside the linkage cavity 3 and is provided with a rotating hand wheel 18.

The above-mentioned embodiments, the objects, technical solutions and advantages of the present invention have been described in , it should be understood that the above description is only the embodiments of the present invention, and should not be used to limit the scope of the present invention, any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

The self-centering clamp comprises a mounting seat (1) and is characterized in that a clamping jaw (2) capable of sliding left and right is arranged at the end of the mounting seat (1), a linkage cavity (3) is arranged at the other end of the mounting seat, a second clamping jaw (4) capable of sliding left and right is arranged at the upper end of the linkage cavity (3), and the clamping jaw (2) and the second clamping jaw (4) form a work station for clamping a workpiece;

the lower end of the th clamping jaw (2) is connected with a guide rod (5), the th guide rod (5) is positioned in the mounting seat (1) and can slide left and right, the end is connected with the th clamping jaw (2), the other end is connected with a driving block (6), the middle part of the 3978 th guide rod is sleeved with a reset spring (7), the driving block (6) is positioned in the lower end of the linkage cavity (3), the left part of the upper end of the driving block is provided with an upper inclined plane (8) which inclines upwards in a forty-five degree direction, and the reset spring (7) is in a compressed state when the clamp is;

the second clamping jaw (4) is connected with a second guide rod (9), the second guide rod (9) is positioned in the upper end of the linkage cavity (3) and can slide left and right, the end is connected with the second clamping jaw (4), the other end is connected with a second driving block (10), the second driving block (10) is positioned in the upper end of the linkage cavity (3), the left part of the lower end is provided with a lower inclined plane (11) which inclines downwards at forty-five degrees, and the second driving block is driven by a linear driver (12) to move left and right;

go up and be provided with linkage piece (13) between inclined plane (8) and lower inclined plane (11), linkage piece (13) can only slide from top to bottom, upper end support lean on inclined plane (11) down and be provided with inclined plane, the lower extreme of inclined plane (11) adaptation support lean on inclined plane at last inclined plane (8) and be provided with inclined plane of inclined plane (8) adaptation down.
2. The self-centering clamp according to claim 1, wherein said -th clamping jaw (2) is detachably connected to -th guide rod (5) through a connecting body (14).
3. The self-centering clamp according to claim 2, wherein the upper end of the connecting body (14) is detachably connected with the th clamping jaw (2), the lower end of the connecting body is fixedly connected with the th guide rod (5) through a connecting part (15), and the lower end face of the connecting body (14) is attached to the upper end face of the mounting seat (1).
4. The self-centering clamp according to claim 1, characterized in that the th clamping jaw (2) and the second clamping jaw (4) are in a flat-bottom V shape, and each inclined surface is provided with a pressing block (16).
5. The self-centering clamp of claim 1, wherein: and the upper end of the linkage cavity (3) is provided with a locking bolt (17) which is just opposite to the second guide rod (9).
6. The self-centering clamp of claim 5, wherein: the upper end of the locking bolt (17) is positioned outside the linkage cavity (3) and is provided with a rotating hand wheel (18).
7. The self-centering clamp of claim 1, wherein: the second driving block (10) is horizontally provided with a guide groove (19), and the side wall of the linkage cavity (3) is provided with a guide rail (20) matched with the guide groove (19).
8. The self-centering clamp according to claim 1, wherein the th guide bar (5) is detachably connected to the th driving block (6), and the second guide bar (9) is detachably connected to the second driving block (10).
9. The self-centering clamp according to any of claims 1 to 8, wherein the linear actuator (12) is a hydraulic cylinder.
10. The self-centering clamp of claim 9, wherein: the output end of the linear driver (12) is detachably connected with the second driving block (10).