CN216179929U

CN216179929U - Positioning clamp

Info

Publication number: CN216179929U
Application number: CN202122641152.8U
Authority: CN
Inventors: 陈宗元; 罗文库; 范小成; 林焕然; 谢继忠
Original assignee: Spaco Intelligent Technology Dongguan Co ltd
Current assignee: Spaco Intelligent Technology Dongguan Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a positioning clamp, which comprises a base, two pressing blocks and a positioning piece, wherein the base is arched, the two pressing blocks are pivoted at the left and right opposite ends of the base in a one-to-one correspondence manner, the base is provided with a plurality of clamping positions which are arranged at intervals along the arch length direction of the base, the opposite upper ends of the positioning pieces are selectively clamped in any one of the clamping positions, and can rotate in the clamping position, the relative lower end of the positioning piece penetrates through the base from top to bottom and is suspended below the two pressing blocks, the two pressing blocks are rotatably pressed on a workpiece under the action of the pressing force provided by the external piece to the positioning piece and the supporting force of the base, the compression joint surfaces of the two pressing blocks are parallel to the compression joint surfaces of the workpieces correspondingly abutted, and the height positions of the compression joint surfaces of the two pressing blocks can be different. The positioning fixture has the advantages of simple structure, strong universality, high positioning precision and high efficiency.

Description

Positioning clamp

Technical Field

The utility model relates to a tool clamp, in particular to a positioning clamp for fixing a workpiece.

Background

With the continuous progress of science and technology, in order to meet the requirements of increasing machining precision and operation efficiency, in the field of machining, machining equipment is continuously upgraded and improved, a workpiece is often required to be clamped and fixed by means of a tool clamp so as to facilitate subsequent machining operation, wherein the positioning clamp is used for pressing and fixing the workpiece from the outside of the workpiece and preventing the workpiece from shifting in the pressing direction. The existing positioning fixture is often only suitable for abutting against and positioning parts of the workpiece with the same height, the parts of the workpiece with different heights cannot be positioned efficiently and conveniently at the same time, the workpieces with different heights cannot be positioned quickly and effectively, and the positioning efficiency is relatively low. If the problems are solved by a plurality of clamps, the production cost is increased, so that the existing positioning clamp has the problems of narrow application range, low universality and low efficiency, and the assembly requirements of machining equipment which is updated quickly cannot be matched effectively. In addition, the existing positioning fixture cannot be tightly attached to the pressed end face of the workpiece due to the manufacturing error of the fixture and the machining error of the workpiece, so that the positioning precision cannot be effectively ensured.

Therefore, a positioning fixture with simple structure, strong versatility, high positioning accuracy and high efficiency is needed to overcome the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a positioning clamp which is simple in structure, strong in universality, high in positioning accuracy and high in efficiency.

In order to achieve the purpose, the utility model discloses a positioning clamp which comprises a base, two pressing blocks and a positioning piece, the base is arched, the two pressing blocks are pivoted at the left and right opposite ends of the base in a one-to-one correspondence manner, the base is provided with a plurality of clamping positions which are arranged at intervals along the arch length direction, the relative upper end of the positioning piece can be selectively clamped in any one of the clamping positions, and can rotate in the clamping position, the relative lower end of the positioning piece penetrates through the base from top to bottom and is suspended below the two pressing blocks, the two pressing blocks are rotatably pressed on a workpiece under the action of the pressing force provided by the external piece to the positioning piece and the supporting force of the base, the compression joint surfaces of the two pressing blocks are parallel to the compression joint surfaces of the workpieces correspondingly abutted, and the height positions of the compression joint surfaces of the two pressing blocks can be different.

Preferably, the base is further provided with a through groove penetrating through the top end face and the bottom end face of the base, and the plurality of clamping positions are arranged at the notch of the through groove at equal intervals along the groove length direction of the through groove.

Preferably, each of the clips includes two grooves linearly arranged along the width direction of the base, the two grooves are correspondingly arranged on the front and rear opposite sides of the notch of the through groove, and the groove is formed by sinking the top end surface of the base towards the bottom end surface of the base.

Preferably, the cross section of the through groove is quadrilateral, oval or fan-shaped, and the cross section of the groove is arc-shaped, Y-shaped or V-shaped.

Preferably, the left and right opposite sides of the base are respectively provided with a placement groove, the placement grooves are formed by sinking one of the left end surface and the right end surface of the base towards the other direction, the opposite upper ends of the two pressing blocks are pivoted in the two placement grooves in a one-to-one correspondence manner, and the opposite lower ends of the two pressing blocks are suspended outside the corresponding placement grooves.

Preferably, the positioning fixture of the present invention further includes a pivot shaft disposed in the disposition groove, and an opposite upper end of the pressing block is rotatably sleeved on the pivot shaft so as to be rotatable around the pivot shaft relative to the base.

Preferably, the positioning fixture further comprises a clamp spring, wherein the clamp spring is detachably clamped at the joint of the pivot shaft and the base and used for preventing the pivot shaft from moving along the axial direction of the pivot shaft.

Preferably, the setting element includes reference column and bracing piece, the reference column include first joint portion and connect in two second joint portions of double-phase offside around first joint portion, two second joint portions joint one-to-one in two recesses in the screens, first joint portion joint in run through in the groove, the relative upper end and the first joint portion of bracing piece are connected, the relative lower extreme of bracing piece passes first joint portion reaches run through behind the groove, hang and locate the below of briquetting.

Preferably, the support rod is detachably connected with the first clamping portion.

Preferably, the first clamping portion is a cylindrical block, a clamping platform is arranged at the top side end of the first clamping portion, and the upper end of the supporting rod is clamped on the clamping platform.

Compared with the prior art, in the positioning fixture, the base is arched, the two pressing blocks are correspondingly pivoted at the left end and the right end of the arched base, the upper end of the positioning piece is rotatably clamped in any clamping position of the base, and the lower end of the positioning piece penetrates through the base from top to bottom and is suspended below the pressing blocks, so that the positioning piece can be connected with an external piece; the two pressing blocks are pivoted on the arched base, and the positioning piece is rotatably clamped in the clamping position, so that the two pressing blocks can be used for abutting against workpieces with the same height, and the clamping position of the positioning piece on the base can be selectively adjusted according to the height difference between the pressed surfaces at different heights on the same workpiece or the height difference between the pressed surfaces of different workpieces, so that the two pressing blocks and the positioning piece can be adjusted in an adaptive rotating manner, synchronous abutting against the pressed surfaces of the same workpiece or different workpieces with different heights can be conveniently and efficiently realized, and the adaptability of the clamp is effectively improved; and the pressing surfaces of the two pressing blocks are always parallel to the pressed surface of the workpiece correspondingly abutted through the automatic alignment of the rotation of the pressing blocks, the pressing blocks can be tightly attached to the workpiece, the manufacturing errors of the clamp and the workpiece are effectively eliminated, and the positioning precision of the workpiece is ensured.

Drawings

Fig. 1 is a perspective view of a positioning jig of the present invention.

Fig. 2 is an exploded view of the positioning jig of the present invention.

Fig. 3 is a plan view of the positioning jig of the present invention.

Fig. 4 is a sectional view taken along a-a direction in fig. 3.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

Referring to fig. 1 to 4, the present invention discloses a positioning fixture 100 for pressing and fixing a workpiece, which includes a base 10, two pressing blocks 20 and a positioning member 30, wherein the base 10 is integrally arched, the two pressing blocks 20 are pivoted to the left and right opposite ends of the base 10 one by one, so as to be rotatable relative to the base 10, the arched base 10 is provided with a plurality of detents 11 arranged at intervals along the arch length direction, the opposite upper end of the positioning member 30 is selectively engaged in any one of the detents 11, and is rotatable in the engaged detent 11, the opposite lower end of the positioning member 30 penetrates the base 10 from top to bottom and is suspended below the two pressing blocks 12 for connecting with an external member (not shown), the external member is used for fixing or pulling the positioning member 30, so as to provide a pressing force to the positioning member 30, so that the two pressing blocks 20 are under the pressing force provided by the external member to the positioning member 30 and the supporting force provided by the base 10, the workpiece to be fixed is rotatably pressed, so that the pressing and positioning of the workpiece are realized. The shape of the pressing surface of the pressing block 20 corresponds to the shape of the pressed surface of the workpiece, and the pressing surface of the pressing block 20 is parallel to the pressed surface of the workpiece 200 which is correspondingly abutted, so that the pressing block is tightly attached to the workpiece. When the two pressing blocks 20 abut against the two pressed surfaces at the same height position of the workpiece or the two pressed surfaces at the same height position of different workpieces, the height positions of the pressing surfaces of the two pressing blocks 20 are the same, at this time, the positioning member 30 can be clamped in the clamping position 11 at the center of the base 10, and the two pressing blocks 20 are symmetrically pressed on the workpiece; when the two pressing blocks 20 press against the two pressed surfaces of different height positions of the workpiece or press against the two pressed surfaces of different height positions of different workpieces, the height positions of the pressing surfaces of the two pressing blocks 20 are different.

It should be noted that the external component of the present invention may be a positioning hole disposed on the machine platform, and when the workpiece to be pressed is light and thin, the opposite lower end of the positioning component 30 may be directly inserted into the positioning hole, so that the workpiece is pressed and fixed between the two pressing blocks 20 and the machine platform by the weight of the positioning fixture 100. The inner wall of the positioning hole can be provided with threads, so that the height position of the two pressing blocks 20 on the machine table can be adaptively adjusted through the threaded connection between the opposite lower end of the positioning piece 30 and the positioning hole, and the pressing positioning of workpieces with different height sizes can be adapted. Certainly, the external component may also be a driver, such as an air cylinder or a motor, disposed on the machine platform, and the opposite lower end of the positioning component 30 is driven by the driver connected thereto to move downward relatively, so as to press the base 10, and thus the two pressing blocks 20 press the workpiece accordingly.

Referring to fig. 1 to 4, in particular, the base 10 is further provided with a through groove 12 penetrating through the top end surface and the bottom end surface thereof, so as to facilitate the positioning element 30 to penetrate through the base 10 from top to bottom. Wherein, a plurality of screens 11 are arranged in the notch department that runs through groove 12 along the groove length direction that runs through groove 12 at equidistant intervals to be convenient for setting element 30 according to actual need, selectively joint in arbitrary screens 11, and then make two briquetting 20 use the joint position of setting element 30 on base 10 as the support, the high position of two briquetting 20 is adjusted to adaptability, support the pressure in the step of the different high position of the different height position of realization to the work piece or the different high position of different work pieces the pressure face in step.

Specifically, each detent 11 includes two grooves 111 linearly arranged along the width direction of the base 10, the two grooves 111 are correspondingly arranged on the front and rear opposite sides of the notch of the through groove 12, and the positioning member 30 is rotatably engaged with the detent 11 formed by the two grooves 111. The groove 111 is formed by recessing the top end surface of the base 10 toward the bottom end surface of the base 10. More specifically, the cross-sectional shape of the through groove 12 is a quadrangle, an ellipse, or a fan, and the cross-sectional shape of the groove 111 is an arc shape, a "Y" shape, or a "V" shape.

Referring to fig. 1 to 4, specifically, the left and right opposite sides of the base 10 are respectively provided with a placement groove 13, the placement groove 13 is formed by sinking one of the left end surface and the right end surface of the base 10 towards the other, the opposite upper ends of the two pressing blocks 30 are pivoted in the two placement grooves 13 in a one-to-one correspondence manner, and the opposite lower ends of the two pressing blocks 20 are suspended outside the corresponding placement grooves 13. In order to facilitate the pressing block 20 to be pivoted on the base 10, the positioning fixture 100 of the present invention further includes a pivoting shaft 40 disposed in the seating groove 13, and an opposite upper end of the pressing block 20 is rotatably sleeved on the pivoting shaft 40 so as to be rotatable about the pivoting shaft 40 relative to the base 10. Further, the positioning fixture 100 of the present invention further includes a snap spring 50, wherein the snap spring 50 is detachably snapped at a connection position of the pivot shaft 40 and the placement groove 13 on the base 10, so as to prevent the pivot shaft 40 from moving along the axial direction thereof. Specifically, the positions of the front and rear side walls of the base 10 corresponding to the placement grooves 13 are respectively provided with a through hole 131, the two through holes 131 are linearly arranged along the front and rear direction, the opposite upper end of the pressing block 20 is provided with a pivot hole 21, and the pivot shaft 40 passes through the through hole 131 on one of the front and rear side walls, the pivot hole 21 and the through hole 131 on the other of the front and rear side walls in sequence and then is clamped with the clamp spring 50 through a shaft groove 41 arranged at the end thereof.

Referring to fig. 1 to 4, specifically, the positioning member 30 includes a positioning column 31 and a supporting rod 32, the positioning column 31 includes a first clamping portion 311 and two second clamping portions 312 connected to front and rear opposite sides of the first clamping portion 311, the two second clamping portions 312 are clamped in the two grooves 111 of the clamping portion 11 in a one-to-one correspondence manner, and can rotate in the corresponding grooves 111 with a small amplitude, the first clamping portion 311 is clamped in the through groove 12, an opposite upper end of the supporting rod 32 is connected with the first clamping portion 311 of the positioning column 31, and an opposite lower end of the supporting rod 32 passes through the first clamping portion 311 and the through groove 12 in sequence, and is suspended below the two pressing blocks 20 for connecting with an external connecting member. The positioning column 31 and the supporting rod 32 can be fixedly connected to form an integrated structure, so that the structure is simplified. Of course, the supporting rod 32 and the positioning column 31 can be detachably connected to form a split structure, so that the positioning member 30 can be quickly and conveniently maintained and replaced. Preferably, the support rod 32 and the positioning post 31 are screwed to facilitate assembly and disassembly. Specifically, the first clamping portion 311 and the second clamping portion 312 are both cylindrical blocks, wherein the length dimension of the first clamping portion 311 corresponds to the width dimension of the through groove 12, and the diameter dimension of the first clamping portion 311 is greater than the diameter dimension of the second clamping portion 312, so that the first clamping portion 311 can be clamped in the through groove 12. Further, the top side of the first clamping portion 311 has a clamping platform 3111, and the upper end of the supporting rod 32 is clamped to the clamping platform 3111. The support rod 32 is embodied as a screw, thereby simplifying the structure and reducing the production cost.

Compared with the prior art, in the positioning fixture 100 of the utility model, the base 10 is in an arch shape, the two pressing blocks 20 are correspondingly pivoted at the left and right opposite ends of the arch-shaped base 10, the opposite upper end of the positioning piece 30 is combined and rotatably clamped in any clamping position 11 of the base 10, and the opposite lower end of the positioning piece 30 penetrates through the base 10 from top to bottom and is suspended below the pressing block 20, so that the pressing block can be connected with an external piece, and the two pressing blocks 20 can be tightly attached to a workpiece to be positioned under the action of the pressing force provided by the external piece for the positioning piece 30 and the supporting force provided by the base 10 through the connection of the positioning piece 30 and the external piece arranged on the machine table, so that the pressing and positioning of the workpiece are realized; the two pressing blocks 20 are pivoted on the arched base 10, and the positioning piece 30 is rotatably clamped in the clamping position 11, so that the two pressing blocks 20 can not only press workpieces with the same height, but also selectively adjust the clamping position of the positioning piece 30 on the base 10 according to the height difference between the pressed surfaces at different heights on the same workpiece or the height difference between the pressed surfaces of different workpieces, so that the two pressing blocks 20 and the positioning piece 30 can be adjusted in an adaptive rotating manner, synchronous pressing of the pressed surfaces of the same workpiece or different heights between different workpieces can be conveniently and efficiently realized, and the adaptability of the clamp is effectively improved; moreover, the pressing surfaces of the two pressing blocks 20 are always parallel to the pressed surface of the corresponding abutted workpiece through the automatic alignment of the rotation of the pressing blocks 20, the pressing blocks 20 can be tightly attached to the workpiece, and the manufacturing errors of the clamp and the workpiece are effectively eliminated, so that the positioning precision of the workpiece is ensured.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A positioning clamp is characterized by comprising a base, two pressing blocks and a positioning piece, wherein the base is arched, the two pressing blocks are pivoted at the left and right opposite ends of the base in a one-to-one correspondence manner, the base is provided with a plurality of clamping positions which are arranged at intervals along the arch length direction of the base, the opposite upper ends of the positioning pieces are selectively clamped in any one of the clamping positions, and can rotate in the clamping position, the relative lower end of the positioning piece penetrates through the base from top to bottom and is suspended below the two pressing blocks, the two pressing blocks are rotatably pressed on a workpiece under the action of the pressing force provided by the external piece to the positioning piece and the supporting force of the base, the compression joint surfaces of the two pressing blocks are parallel to the compression joint surfaces of the workpieces correspondingly abutted, and the height positions of the compression joint surfaces of the two pressing blocks can be different.

2. The positioning fixture according to claim 1, wherein the base further has a through slot passing through the top end surface and the bottom end surface thereof, and the plurality of locking portions are arranged at the notch of the through slot at equal intervals along the slot length direction of the through slot.

3. The positioning fixture of claim 2, wherein each of the detents comprises two grooves linearly arranged along the width direction of the base, the two grooves are correspondingly arranged on the front and back opposite sides of the notch of the through groove, and the grooves are formed by recessing the top end surface of the base towards the bottom end surface of the base.

4. The positioning jig of claim 3, wherein the cross-sectional shape of the through groove is a quadrangle, an ellipse or a fan, and the cross-sectional shape of the groove is an arc, a "Y" or a "V".

5. The positioning fixture according to claim 1, wherein the left and right opposite sides of the base are respectively provided with a placement groove, the placement grooves are formed by recessing one of the left end surface and the right end surface of the base towards the other direction, the opposite upper ends of the two pressing blocks are pivoted in the two placement grooves in a one-to-one correspondence manner, and the opposite lower ends of the two pressing blocks are suspended outside the corresponding placement grooves.

6. The positioning jig of claim 5, further comprising a pivot shaft disposed in the seating groove, wherein an opposite upper end of the pressing piece is rotatably fitted over the pivot shaft so as to be rotatable about the pivot shaft with respect to the base.

7. The positioning fixture of claim 6, further comprising a clamp spring detachably clamped at a joint of the pivot shaft and the base for preventing the pivot shaft from moving along an axial direction thereof.

8. The positioning fixture according to claim 3, wherein the positioning member comprises a positioning column and a supporting rod, the positioning column comprises a first clamping portion and two second clamping portions connected to two opposite sides of the front and back of the first clamping portion, the two second clamping portions are clamped in the two grooves of the clamping portion in a one-to-one correspondence manner, the first clamping portion is clamped in the through groove, the upper end of the supporting rod is connected with the first clamping portion, and the lower end of the supporting rod is suspended below the pressing block after passing through the first clamping portion and the through groove.

9. The positioning jig of claim 8, wherein the support bar is detachably connected to the first clamping portion.

10. The positioning fixture of claim 8, wherein the first clamping portion is a cylindrical block, a clamping platform is arranged at the top end of the first clamping portion, and the opposite upper end of the support rod is clamped on the clamping platform.