CN215147009U

CN215147009U - Self-centering clamp

Info

Publication number: CN215147009U
Application number: CN202121481105.5U
Authority: CN
Inventors: 罗有旺; 许冠; 韩红安; 梁翱; 顾志辉; 罗烁鑫; 胡建武; 毛卫东
Original assignee: Foshan Nanhai Zhongnan Machinery Co ltd; Foshan Fowei Precision Machinery Co ltd
Current assignee: Foshan Nanhai Zhongnan Machinery Co ltd; Foshan Fowei Precision Machinery Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-14
Anticipated expiration: 2031-06-30

Abstract

The utility model provides a self-centering clamp, which comprises a base, clamping arms, sliding seats with the same number as the clamping arms, and a driving mechanism for driving the two clamping arms to move synchronously; the clamping arms are slidably mounted on the base through a sliding seat, and a clamping station is arranged between the two clamping arms; the driving mechanism is arranged in the base and connected with the sliding seat, so that the sliding seat is driven to drive the clamping arm to synchronously open and close; the two clamping arms are respectively provided with a positioning piece for stably positioning the workpiece; the positioning pieces are of more than two rollable structures and are arranged on the opposite surfaces of the two clamping arms; when the workpiece clamping device works, the two clamping arms stably position the workpiece through more than four positioning pieces. The utility model discloses from centering anchor clamps simple structure, this from centering anchor clamps can be from centering clamping workpiece, have the characteristics that positioning accuracy is high and positional stability is strong, can extensively be applicable to and use in the numerical control processing machinery.

Description

Self-centering clamp

Technical Field

The utility model relates to a machinery processing technology field, more specifically say, relate to a from centering anchor clamps.

Background

In the machining industry, a fixture is a device used to fix a machining object to a correct position for machining or inspection in a machining process. Jigs are widely used in mechanical manufacturing processes for various processes, such as for quickly, conveniently, and safely mounting workpieces.

However, the existing clamp has the disadvantages of low adjusting efficiency and low adjusting precision in use. And because the size shape of numerical control processing work piece is different, therefore most anchor clamps are to the work piece location inaccuracy, lead to inconvenient when processing the use, produce the deviation in the in-process of processing easily, and serious person probably leads to the damage of work piece, increases manufacturing cost. In addition, the existing clamp has a complex structure, can mostly not realize self-centering and often cannot meet the requirements of processing conditions, so that the processing precision is poor. Therefore, how to improve the clamping precision and stability of the clamp becomes a problem which needs to be solved urgently by machining.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a self-centering clamp with simple structure; the self-centering clamp can self-center and clamp a workpiece, has the characteristics of high positioning precision and strong positioning stability, and can be widely applied to numerical control processing machines.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a self-centering clamp, characterized in that: the device comprises a base, clamping arms, sliding seats and a driving mechanism, wherein the number of the sliding seats is equal to that of the clamping arms; the clamping arm is slidably mounted on the base through a sliding seat; the driving mechanism is arranged in the base and connected with the sliding seat, so that the sliding seat is driven to drive the clamping arm to synchronously open and close;

the two clamping arms are respectively provided with a positioning piece for stably positioning the workpiece; the positioning pieces are of more than two rollable structures and are arranged on the opposite surfaces of the two clamping arms; when the workpiece clamping device works, the two clamping arms stably position the workpiece through more than four positioning pieces.

In the above technical scheme, the utility model discloses a synchronous opening and closing motion of centre gripping arm can carry out from the centering to the work piece and press from both sides tightly, can improve machining efficiency. In addition, the two clamping arms position the workpiece through more than four positioning pieces, so that the positioning accuracy of the clamp can be greatly improved, the positioning stability of the clamp is enhanced, and the clamp can be suitable for workpieces with different sizes and shapes by virtue of a plurality of positioning points, so that the universality is improved. Meanwhile, the positioning piece is of a rolling structure, so that the surface of the workpiece can be protected, and the scraping probability of clamping the workpiece is reduced.

More than two positioning pieces are arranged on the opposite surfaces of the clamping arms along the height direction of the clamping arms. The design can increase the positioning point when the workpiece is clamped, thereby further improving the stability of workpiece positioning.

The clamping arm is provided with a mounting groove, and the positioning piece is mounted in the mounting groove and protrudes out of the opposite surface of the clamping arm.

The positioning member comprises a shaft and at least one bearing; the bearing is installed in the installation groove through a shaft, and the outer ring surface of the bearing protrudes out of the opposite surface of the clamping arm. The utility model discloses can set up the quantity of bearing according to the width of centre gripping arm or the size of work piece.

The driving mechanism comprises a positive and negative screw rod, a first nut and a second nut; the positive and negative tooth lead screw is arranged in the base in a penetrating mode and connected with the base through the tapered roller bearing, and the first nut and the second nut are sleeved on the positive and negative tooth lead screw respectively.

The positive and negative screw threads are provided with positive spiral threads and negative spiral threads; the first nut is in threaded connection with the positive spiral threads and is connected with one sliding seat; and the second nut is in threaded connection with the reverse spiral threads and is connected with the other sliding seat. When the clamping arm is used, the external driving piece can drive the positive and negative teeth screw rod to rotate, so that the first nut and the second nut can drive the clamping arm to synchronously open and close.

The utility model also comprises a top chip baffle plate used for reducing the entering of the fine chips between the positioning piece and the workpiece; the top chip blocking plate is adjustably connected with the top of each clamping arm. When the positioning piece is machined, the top chip blocking plate can reduce fine chips such as metal chips and the like from entering between the positioning piece and a workpiece, and the workpiece is prevented from being damaged by the metal chips. The utility model discloses the mounted position of adjustable top fender bits board when treating that anchor clamps press from both sides tight work piece, can be according to the actual conditions of actual work piece, adjusts the position that the top kept off the bits board.

The adjustable connection of top fender bits board and the top of centre gripping arm indicates: the device also comprises a locking piece; the adjusting hole has been seted up to top fender bits board, and the adjusting hole is locked through the retaining member behind top fender bits board and the centre gripping arm adjusting position, realizes that top fender bits board and centre gripping arm are fixed.

The end part of the top scrap blocking plate close to the opposite surface of the clamping arm is of an inclined structure. The design can make the fines avoid between the positioning piece and the workpiece to fall along the inclined structure.

The utility model also comprises a lateral chip baffle plate used for reducing the entering of the fine chips between the positioning piece and the workpiece; the lateral chip blocking plates are arranged on the lateral parts of two sides of each clamping arm.

Compared with the prior art, the utility model has the advantages of as follows and beneficial effect: the utility model discloses from centering anchor clamps simple structure, this from centering anchor clamps can be from centering clamping workpiece, have the characteristics that positioning accuracy is high and positional stability is strong, can extensively be applicable to and use in the numerical control processing machinery.

Drawings

FIG. 1 is a schematic view of the self-centering fixture of the present invention;

FIG. 2 is a side schematic view of the self-centering fixture of the present invention;

FIG. 3 is an internal schematic view of the self-centering fixture of the present invention;

wherein, 1 is a base, 2 is a clamping arm, 3 is a sliding seat, 4 is a shaft, 5 is a bearing, 6 is a screw rod with positive and negative teeth, 7 is a first nut, 8 is a second nut, 9 is a tapered roller bearing, 10 is a top chip baffle, 11 is a side chip baffle, 12 is a locking piece, and 13 is an adjusting hole.

Detailed Description

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

Examples

As shown in fig. 1 to 3, the utility model discloses from centering anchor clamps include base 1, centre gripping arm 2, slide 3 that equals with 2 quantity of centre gripping arm and be used for driving two 2 synchronous motion's of centre gripping arm actuating mechanism, and wherein, centre gripping arm 2 passes through slide 3 slidable mounting on base 1, and actuating mechanism sets up inside base 1 and is connected with slide 3, realizes that drive slide 3 drives 2 synchronous opening and shutting motions of centre gripping arm.

The two clamping arms 2 of the utility model are respectively provided with a positioning piece for stably positioning the workpiece, and the positioning pieces are two rollable structures and are arranged on the opposite surfaces of the two clamping arms 2; during operation, the two clamping arms 2 stably position the workpiece through the four positioning pieces. In order to increase the positioning points for clamping the workpiece, the two positioning pieces are arranged on the opposite surfaces of the clamping arms 2 along the height direction of the clamping arms 2, so that the stability of positioning the workpiece is further improved. Specifically speaking, the clamping arm 2 has been seted up the mounting groove, and the setting element includes axle 4 and two bearings 5, and bearing 5 passes through axle 4 to be installed in the mounting groove, and the outer lane face salient in the opposite face of clamping arm 2 of bearing 5. The utility model discloses can set up the quantity of bearing 5 and the quantity of setting element according to the width of centre gripping arm 2 or the size of work piece.

The utility model discloses an actuating mechanism includes positive and negative tooth lead screw 6, first nut 7 and second nut 8, and wherein, positive and negative tooth lead screw 6 is worn to establish inside 1 base and is connected with the base through tapered roller bearing 9, and positive and negative tooth lead screw 6 is provided with positive spiral line and anti-spiral line, and first nut 7 is connected with positive spiral line threaded connection and rather than one of them slide 3, and second nut 8 is connected with anti-spiral line threaded connection and with another slide 3. When the clamping arm is used, the external driving piece can drive the positive and negative teeth screw rod 6 to rotate, so that the first nut 7 and the second nut 8 can drive the clamping arm 2 to synchronously open and close.

The utility model discloses still including being used for reducing the top that the fines got into between setting element and the work piece and keeping off bits board 10 and lateral part and keeping off bits board 11, wherein, top keeps off bits board 10 and every centre gripping arm 2's top adjustable connection, and lateral part keeps off bits board 11 and sets up the both sides lateral part at every centre gripping arm 2. During machining, the top scrap baffle plate 10 and the side scrap baffle plate 11 can reduce fine scraps such as metal scraps from entering between the positioning piece and the workpiece, and the workpiece is prevented from being damaged by the metal scraps. The utility model discloses adjustable top keeps off mounted position of bits board 10, when treating that anchor clamps press from both sides tight work piece, can adjust the position that the top kept off bits board 10 according to the actual conditions of actual work piece.

Specifically speaking, the utility model discloses still include retaining member 12, the top keeps off bits board 10 and offers the regulation hole 13 of trompil form, and the top keeps off bits board 10 and centre gripping arm 2 regulation position back, through retaining member 12 locking regulation hole 13, realizes that the top keeps off bits board 10 and centre gripping arm 2's is fixed. The end part of the top chip baffle 10 close to the opposite surface of the clamping arm 2 is of an inclined structure, so that the fine chips can be prevented from falling along the inclined structure between the positioning piece and the workpiece.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A self-centering clamp, characterized in that: the device comprises a base, clamping arms, sliding seats and a driving mechanism, wherein the number of the sliding seats is equal to that of the clamping arms; the clamping arms are slidably mounted on the base through a sliding seat, and a clamping station is arranged between the two clamping arms; the driving mechanism is arranged in the base and connected with the sliding seat, so that the sliding seat is driven to drive the clamping arm to synchronously open and close;

2. The self-centering clamp of claim 1, wherein: more than two positioning pieces are arranged on the opposite surfaces of the clamping arms along the height direction of the clamping arms.

3. The self-centering clamp of claim 1, wherein: the clamping arm is provided with a mounting groove, and the positioning piece is mounted in the mounting groove and protrudes out of the opposite surface of the clamping arm.

4. The self-centering clamp of claim 3, wherein: the positioning member comprises a shaft and at least one bearing; the bearing is installed in the installation groove through a shaft, and the outer ring surface of the bearing protrudes out of the opposite surface of the clamping arm.

5. The self-centering clamp of claim 1, wherein: the driving mechanism comprises a positive and negative screw rod, a first nut and a second nut; the positive and negative tooth lead screw is arranged in the base in a penetrating mode and connected with the base through the tapered roller bearing, and the first nut and the second nut are sleeved on the positive and negative tooth lead screw respectively.

6. The self-centering clamp of claim 5, wherein: the positive and negative screw threads are provided with positive spiral threads and negative spiral threads; the first nut is in threaded connection with the positive spiral threads and is connected with one sliding seat; and the second nut is in threaded connection with the reverse spiral threads and is connected with the other sliding seat.

7. The self-centering clamp of any one of claims 1 to 6, wherein: the top chip blocking plate is used for reducing fine chips entering between the positioning piece and the workpiece; the top chip blocking plate is adjustably connected with the top of each clamping arm.

8. The self-centering clamp of claim 7, wherein: the adjustable connection of top fender bits board and the top of centre gripping arm indicates: the device also comprises a locking piece; the adjusting hole has been seted up to top fender bits board, and the adjusting hole is locked through the retaining member behind top fender bits board and the centre gripping arm adjusting position, realizes that top fender bits board and centre gripping arm are fixed.

9. The self-centering clamp of claim 7, wherein: the end part of the top scrap blocking plate close to the opposite surface of the clamping arm is of an inclined structure.

10. The self-centering clamp of any one of claims 1 to 6, wherein: the side chip blocking plate is used for reducing fine chips entering between the positioning piece and the workpiece; the lateral chip blocking plates are arranged on the lateral parts of two sides of each clamping arm.