CN112894683A

CN112894683A - Positioning jig

Info

Publication number: CN112894683A
Application number: CN202110344096.3A
Authority: CN
Inventors: 邓春华; 李江华; 乐奎
Original assignee: World Precision Manufacturing Dongguan Co Ltd
Current assignee: World Precision Manufacturing Dongguan Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-06-04

Abstract

The invention discloses a positioning jig which comprises a base plate, a top plate, a bottom plate, a movable plate, a cam assembly, a first clamping block and a second clamping block, wherein the top plate and the bottom plate are arranged at the upper end and the lower end of the base plate, the movable plate is slidably embedded between the base plate and the bottom plate, the cam assembly is arranged between the bottom plate and the movable plate, the first clamping block and the second clamping block are connected with the cam assembly and movably arranged on the top plate, a profile groove for fixing a workpiece is arranged at the relative center of the top plate, the first clamping block and the second clamping block are correspondingly arranged at the edges of the two vertical side ends of the profile groove, and when the movable plate slides relative to the bottom plate, the cam assembly can be driven to act, so that the first clamping block and the second clamping block can linearly move close to or far away from the profile groove along with the first clamping block and the second. The positioning jig disclosed by the invention is simple in structure, high in automation degree, high in efficiency and high in positioning precision.

Description

Positioning jig

Technical Field

The invention relates to the field of electronic product assembly, in particular to a positioning jig for automatically assembling a product.

Background

With the rapid development of scientific technology and the demand of people for high-quality life, electronic products such as mobile phones, tablet computers, vehicle-mounted computers and the like are also developed towards high-density integration and ultra-refinement, and the heat dissipation performance of the electronic products is also increasingly important, so that the requirements on mounting equipment for assembling the heat dissipation module of the electronic products and a circuit board are higher and higher. Wherein, in the assembling process of the shaping frame that will be adorned long, two kinds of conducting strip of weak point subsides on heat dissipation module in order to form to protect CPU, because heat dissipation module's shape is irregular, and has certain curvature, therefore difficult location to, two kinds of conducting strip's shape is also irregular, still has certain elasticity, therefore is difficult for laminating more, and the assembly error between two kinds of conducting strip and the heat dissipation module and the assembly error between two kinds of conducting strip must strictly control at required numerical range class each other. At present, the alignment and the attachment of the conductive adhesive tape and the heat dissipation module mostly adopt a manual operation mode, the manual operation efficiency is low, and the mounting precision cannot be effectively ensured.

Therefore, there is a need for a positioning fixture with simple structure, high precision and high efficiency, which can be used in automated line production to overcome the above-mentioned problems, so as to improve the bonding quality while improving the production efficiency.

Disclosure of Invention

The invention aims to provide a positioning jig which is simple in structure, high in positioning accuracy and high in efficiency.

In order to achieve the above object, the present invention discloses a positioning jig, comprising a base plate, a top plate and a bottom plate installed at two opposite ends of the base plate, a movable plate slidably embedded between the base plate and the bottom plate, a cam assembly disposed between the bottom plate and the movable plate, a first clamping block and a second clamping block connected with the cam assembly and movably disposed on the top plate, the opposite center of the top plate is provided with a profile groove for fixing a workpiece, the first clamping block and the second clamping block are correspondingly arranged at the edges of two vertical side ends of the profile groove, when the movable plate slides relative to the bottom plate, the cam assembly can be driven to act, so that the first clamping block and the second clamping block can move linearly to be close to or far away from the profile groove along with the cam assembly, and a workpiece arranged in the profile groove can be clamped or unclamped.

Compared with the prior art, the positioning jig drives the cam component arranged between the base plate and the movable plate to act by sliding the movable plate embedded between the base plate and the base plate relative to the base plate, so that the first clamping block and the second clamping block connected with the cam component synchronously move close to or far away from the profile groove in a linear mode under the driving of the cam component, and a workpiece arranged in the profile groove can be clamped or loosened in two vertical directions. The positioning jig can realize automatic operation of clamping a workpiece, and has the advantages of simple structure, accurate positioning, convenience and quickness in use, high efficiency and high attaching accuracy.

Preferably, the cam assembly includes a cam and a pushing member, the cam is slidably disposed on the bottom plate and located beside the movable plate, the pushing member is disposed on a side end of the movable plate opposite to the cam, an abutting surface of the pushing member abutting against the cam is an inclined surface or a curved surface, a lower end of the first clamping block is connected to the cam, an upper end of the first clamping block penetrates through the base plate and the top plate and is located at a right side end of the profile groove, a lower end of the second clamping block is connected to the movable plate, and an upper end of the second clamping block penetrates through the base plate and the top plate and is located at a front side end of the profile groove.

Preferably, the profile modeling groove is arranged in a plurality of on the roof, first clamp splice and second clamp splice with the profile modeling groove is the arrangement of one-to-one, the cam with first clamp splice is the connection of one-to-one, propelling movement spare with the cam is the setting of one-to-one, or, one propelling movement spare is followed the lengthwise direction of fly leaf arranges, have on the propelling movement spare a plurality of be arranged at interval ground and with the cam is the butt head that the butt is the ground butt of one-to-one.

Preferably, the pushing member and the movable plate are of an integral structure, and one end of the side wall of the movable plate, which is opposite to the cam, is concave-convex outwards to form the pushing member.

Preferably, the first clamping block is detachably connected with the cam, and the second clamping block is detachably connected with the movable plate.

Preferably, the cam assembly further comprises a base and a mounting seat, the cam is rotatably mounted on the mounting seat, the lower end of the mounting seat is slidably connected with the base, and the upper end of the mounting seat is connected with the first clamping block.

Preferably, the cam assembly further comprises an elastic member, and the elastic member is disposed between the first clamping block and the bottom plate or the base plate, and between the second clamping block and the base plate or the top plate, and is used for constantly driving the first clamping block and the second clamping block to move linearly in a direction close to the profiling groove.

Preferably, a containing groove is formed in the center of the substrate, a first through hole and a second through hole communicated with the containing groove are formed in the top wall of the substrate, a first penetrating hole and a second penetrating hole are formed in the top plate at positions corresponding to the first through hole and the second through hole, the bottom plate is connected to the notch of the containing groove in a combined mode, the movable plate is slidably embedded in the containing groove, the first clamping block penetrates through the first through hole and then penetrates through the first penetrating hole, the second clamping block penetrates through the second through hole and then penetrates through the second penetrating hole, and a third through hole communicated with the containing groove is further formed in the side wall of the substrate.

Preferably, the top plate is further provided with a first positioning element, a second positioning element and a third positioning element which are distributed at the edge of the profile groove at intervals, and the first positioning element, the second positioning element and the third positioning element are correspondingly used for positioning reference of a workpiece in the profile groove along the X-axis direction, the Y-axis direction and the Z-axis direction.

Preferably, the front end and the rear end of the bottom plate are respectively provided with a linear guide rail, the movable plate is slidably arranged on the two linear guide rails, the bottom plate or the base plate is further provided with a stop piece along the sliding direction of the movable plate, and a blocking piece matched with the stop piece is convexly arranged at the side end of the movable plate.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of a workpiece clamped on the positioning fixture of the present invention.

Fig. 2 is a schematic plan view of a workpiece clamped on the positioning fixture of the present invention.

Fig. 3 is a schematic perspective view of an angle of the positioning fixture of the present invention.

Fig. 4 is a schematic perspective view of another angle of the positioning fixture of the present invention.

Fig. 5 is a schematic plan view of a positioning fixture according to the present invention.

Fig. 6 is a schematic plan view of the substrate of the present invention.

Fig. 7 is a schematic perspective view of the cam assembly assembled with the bottom plate and the movable main plate according to the present invention.

Fig. 8 is a schematic plan view of the cam assembly assembled with the base plate and the movable main plate according to the present invention.

Fig. 9 is an exploded view of the cam assembly of the present invention assembled with a base plate and a movable main plate.

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 and 2, the present invention discloses a positioning fixture 100, which is suitable for positioning a workpiece 200 so that other components are aligned and assembled on the workpiece 200. In the present application, the workpiece 200 is specifically a heat dissipation module for heat dissipation protection of a circuit board in a vehicle-mounted computer, and the whole heat dissipation module is in a bat shape, and includes a heat dissipation portion 201 having two side wings and a positioning portion 202 located at the relative center of the heat dissipation portion 201, and the two side wings are provided with heat dissipation fins. Specifically, the two side wings of the heat dissipating portion 201 are symmetrically arranged and have a certain curvature, the heat dissipating portion 201 is substantially shaped like a Chinese character ji, the positioning portion 202 is rectangular, the two long conductive adhesive strips 300 and the two short conductive adhesive strips 400 are attached to the edges of the two long frames and the two short frames of the positioning portion 202 in an aligned manner, so as to form a rubber frame for protecting the CPU, and the at least two conductive adhesive blocks 500 are attached to the opposite positions of the two side wings of the heat dissipating portion 201 in an aligned manner. The shapes of the top end surfaces of the long conductive adhesive tape 300 and the short conductive adhesive tape 400 are irregular and have a certain curvature, and the conductive adhesive block 500 has a certain thickness.

Referring to fig. 1 to 6, a positioning fixture 100 according to a preferred embodiment of the present invention includes a base plate 10, a top plate 20 and a bottom plate 30 disposed at two opposite ends of the base plate 10, a movable plate 40 slidably inserted between the base plate 10 and the bottom plate 30, a cam assembly 50 disposed between the bottom plate 30 and the movable plate 40, and a first clamping block 60 and a second clamping block 70 connected to the cam assembly 50 and movably disposed on the top plate 20, wherein a contour groove 20a for fixing a workpiece 200 is disposed at an opposite center of the top plate 20, and the first clamping block 60 and the second clamping block 70 are correspondingly disposed at two vertical edges of the contour groove 20 a. When the movable plate 40 slides relative to the base plate 30, the cam assembly 50 is actuated to linearly move the first clamping block 60 and the second clamping block 70 toward or away from the contour groove 20a, thereby clamping or releasing the workpiece 200 disposed in the contour groove 20 a.

Specifically, in the present embodiment, the accommodating groove 10a is formed at the opposite center of the base plate 10, the accommodating groove 10a is formed by recessing the opposite center of the bottom wall 11 of the base plate 10 toward the opposite center of the top wall 12 of the base plate 10, and the end surface of the opposite center of the top wall 12 is higher than the end surfaces of the opposite sides thereof, so that the base plate 10 is shaped like a fisher cap, that is, has an accommodating space protruding upward. The movable plate 40 is slidably inserted into the receiving groove 10a, the bottom plate 30 is assembled to the notch of the receiving groove 10a to close the notch, the top plate 20 is fixed to the opposite center of the top wall 12 of the base plate 10, and the shape of the curved groove 20a of the top plate 20 corresponds to the shape of the connecting end of the positioning portion 202 of the workpiece 200 and the connecting end of the heat dissipation portion 201 connected to the positioning portion 202. The top wall 12 of the substrate 10 is provided with positioning blocks 80 at positions corresponding to two opposite sides of the accommodating groove 10a, for overlapping two side wings of the heat dissipation portion 201 of the workpiece 200.

Referring to fig. 1, 4 and 6, in the present embodiment, in the top wall 12 of the substrate 10, a first through hole 121 and a second through hole 122 are further formed corresponding to the first clamping block 60 and the second clamping block 70 and communicated with the accommodating groove 10a, a first penetrating hole 21 and a second penetrating hole 22 are formed at positions corresponding to the first through hole 121 and the second through hole 122 on the top plate 20, the first clamping block 60 penetrates through the first through hole 121 and then is disposed in the first penetrating hole 21, and the second clamping block 70 penetrates through the second through hole 122 and then is disposed in the second penetrating hole 22. The front and rear opposite sidewalls of the base plate 10 are further provided with third through holes 10b communicated with the accommodating groove 10a, and the movable plate 40 is exposed in the third through holes 10b, so that the sliding operation of the movable plate 40 in the accommodating groove 10a is facilitated. Specifically, the movable plate 40 can be sucked or pushed through the third through hole 10b by the output end of the external suction cup or the driver, so as to drive the movable plate 40 to slide.

Specifically, in the present embodiment, in order to achieve efficient positioning, the top plate 20 is further provided with a first positioning element 23, a second positioning element 24 and a third positioning element 25 which are distributed at intervals at the edge of the contour groove 20a, and the first positioning element, the second positioning element and the third positioning element correspond to positioning references of the workpiece 200 in the contour groove 20a along the X-axis direction, the Y-axis direction and the Z-axis direction. When the workpiece 200 is placed in the contour groove 20a, the first positioning element 23, the second positioning element 24 and the third positioning element 25 can be used for quick alignment, thereby improving the efficiency and accuracy of subsequent clamping and fixing. The first positioning element 23 and the second positioning element 24 are correspondingly disposed on opposite sides of the first clamping block 60 and the second clamping block 70, the third positioning element 25 is disposed in the contour groove 20a at a position corresponding to a connecting end of the heat dissipation portion 201 and the positioning portion 202 of the workpiece 200, the first positioning element 23 and the second positioning element 24 are in a block shape, and the third positioning element 25 is in a column shape.

Referring to fig. 7 to 9, in the present embodiment, a linear guide 31 is respectively disposed at two opposite ends of the front and back of the bottom plate 30, the movable plate 40 is slidably disposed on the two linear guide 31, a stop member 111 is further disposed on the bottom plate 30 or the base plate 10 along the sliding direction of the movable plate 40, and a blocking member 41 engaged with the stop member 111 is convexly disposed at a side end of the movable plate 40. The blocking piece 41 is in a bar shape, the stopping piece 111 is in a slot shape, and the sliding of the movable plate 40 is simply and effectively limited by the alignment and clamping of the two pieces.

Specifically, in the present embodiment, the cam assembly 50 includes a cam 51 and a pushing member 52 abutting against each other, the cam 51 is slidably disposed on the bottom plate 30 and located at a side of the movable plate 40, the pushing member 52 is disposed on the movable plate 40 and located at a side end opposite to the cam 51, an abutting surface 521 of the pushing member 52 abutting against the cam 51 is an inclined surface or a curved surface, a lower end of the first clamping block 60 is connected to the cam 51, an upper end of the first clamping block 60 sequentially passes through the base plate 10 and the top plate 20 and is located at a right side end of the contour groove 20a, a lower end of the second clamping block 70 is connected to the movable plate 40, and an upper end of the second clamping block 70 sequentially passes through the base plate 10 and the top plate 20 and is located at a front side end of the contour groove.

Specifically, in the present embodiment, a plurality of contour grooves 20a are arranged on the top plate 20, the first clamping blocks 60 and the second clamping blocks 70 are arranged in a one-to-one correspondence with the contour grooves 20a, the cams 51 are connected to the first clamping blocks 60 in a one-to-one correspondence, and the pushing members 52 are arranged in a one-to-one correspondence with the cams 51, or one pushing member 52 is arranged along the longitudinal direction of the movable plate 40, and the pushing member 52 has a plurality of abutting surfaces 521 arranged at intervals and abutting against the cams 51 in a one-to-one correspondence. The cams 51 can be driven to slidingly engage with the abutting surface 521 of the pushing member 52 by the action of the movable plate 40, so as to quickly and effectively clamp the workpieces 200.

Preferably, the pushing member 52 and the movable plate 40 are of an integral structure, and one end of the side wall 43 of the movable plate 40, which is opposite to the cam 52, is outwardly concave-convex to form the pushing member 52, so that the structure is further optimized, and the processing and the assembly are convenient.

Specifically, in this embodiment, the first clamping block 60 is detachably connected to the cam 52, and the second clamping block 70 is detachably connected to the movable plate 40, so that the corresponding first clamping block 60 and the corresponding second clamping block 70 can be replaced according to actual needs, thereby effectively improving the adaptability of the jig. Specifically, the cam assembly 50 further includes a base 53 and a mounting seat 54, the cam 52 is rotatably installed on the mounting seat 54, the lower end of the mounting seat 54 is slidably connected to the base 53, the upper end of the mounting seat 54 is connected to the first clamping block 60, and when in use, the first clamping block 60 required correspondingly is sleeved on the mounting seat 54. The top end of the movable plate 40 may further be provided with a positioning seat 42, and the second clamping block 70 required by the positioning seat 42 is sleeved with the positioning seat.

Specifically, in the present embodiment, the cam assembly 50 further includes an elastic member 55, and the elastic member 55 is disposed between the first clamping block 60 and the bottom plate 30 or the base plate 10, and between the second clamping block 70 and the base plate 10 or the top plate 20, for constantly driving the first clamping block 60 and the second clamping block 70 to move linearly toward the curved groove 20 a. Of course, the elastic member 55 may also be disposed between the movable plate 40 and the bottom plate 30 or the base plate 10 for constantly urging the movable plate 40 to return, so as to drive the first clamping block 60 and the second clamping block 70 to move linearly in a direction approaching the contour groove 20 a.

The working principle of the positioning fixture 100 of the present invention is described below with reference to fig. 1 to 9:

when in use, the movable plate 40 is driven to slide in the accommodating groove 10a along the Y-axis direction manually or by a driver or a suction cup, so as to drive the plurality of second clamping blocks 70 installed at the top side end of the movable plate 40 to move in the corresponding second penetrating holes 22 along the Y-axis direction, so as to simultaneously move away from the profile groove 20a for abdicating, meanwhile, the plurality of abutting surfaces 521 of the one or more pushing pieces 52 on the side wall of the movable plate 40 abut against the cam 51 abutting against the same, so as to drive the plurality of first clamping blocks 60 to linearly move in the corresponding first penetrating holes 21 along the X-axis direction, so as to simultaneously move away from the profile groove 20a for abdicating, so as to oppositely place the plurality of workpieces 200 in the corresponding profile grooves 20a, and during this process, the corresponding elastic pieces 55 are compressed;

then, the pushing force on the movable plate 40 is released manually by a driver or a suction cup, under the restoring force of the elastic members 55, the movable plate 40 slides in the accommodating groove 10a in the Y-axis direction in the opposite direction, the second clamping blocks 70 move in the opposite direction in the Y-axis direction in the corresponding second penetrating holes 22 to be reset, thereby simultaneously approaching the corresponding contour grooves 20a to clamp the workpiece 200 placed in each contour groove 20a from the Y-axis direction, at the same time, the pushing surfaces 521 of the pushing member or pushing members 52 release the pushing force on the cam 51, the first clamping blocks 60 move in the opposite direction in the X-axis direction in the corresponding first penetrating holes 21 to be reset, thereby simultaneously approaching the corresponding contour grooves 20a to clamp the workpiece 200 placed in each contour groove 20a from the X-axis direction, thereby clamping and positioning the workpiece 200 in two perpendicular directions, the positioning effect is better.

Compared with the prior art, the positioning jig 100 of the present invention slides relative to the base plate 30 through the movable plate 40 embedded between the base plate 10 and the base plate 30, so as to drive the cam assembly 50 disposed between the base plate 30 and the movable plate 40 to move, and thus, under the driving of the cam assembly 50, the first clamping block 60 and the second clamping block 70 connected to the cam assembly 50 synchronously perform linear movements approaching to or departing from the contour groove 20a, so as to clamp or release the workpiece 200 disposed in the contour groove 20a from two perpendicular directions. The positioning jig 100 can realize automatic operation of clamping the workpiece 200, and has the advantages of simple structure, accurate positioning, convenient use, high efficiency and high attaching accuracy.

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 jig is characterized by comprising a base plate, a top plate and a bottom plate which are arranged at the upper end and the lower end of the base plate, a movable plate which is embedded between the base plate and the bottom plate in a sliding way, a cam component which is arranged between the bottom plate and the movable plate, a first clamping block and a second clamping block which are connected with the cam component and are movably arranged on the top plate, the opposite center of the top plate is provided with a profile groove for fixing a workpiece, the first clamping block and the second clamping block are correspondingly arranged at the edges of two vertical side ends of the profile groove, when the movable plate slides relative to the bottom plate, the cam assembly can be driven to act, so that the first clamping block and the second clamping block can move linearly to be close to or far away from the profile groove along with the cam assembly, and a workpiece arranged in the profile groove can be clamped or unclamped.

2. The positioning fixture according to claim 1, wherein the cam assembly includes a cam and a pushing member, the cam is slidably disposed on the bottom plate and located beside the movable plate, the pushing member is disposed on the movable plate at a side opposite to the cam, an abutting surface of the pushing member abutting against the cam is an inclined surface or a curved surface, a lower end of the first clamping block is connected to the cam, an upper end of the first clamping block passes through the base plate and the top plate and is located at a right side end of the contour groove, a lower end of the second clamping block is connected to the movable plate, and an upper end of the second clamping block passes through the base plate and the top plate and is located at a front side end of the contour groove.

3. The positioning fixture according to claim 2, wherein the top plate has a plurality of grooves, the first and second blocks are disposed in a one-to-one correspondence with the grooves, the cams are connected to the first blocks in a one-to-one correspondence, the pushing members are disposed in a one-to-one correspondence with the cams, or one of the pushing members is disposed along a longitudinal direction of the movable plate, and the pushing members has a plurality of abutting heads disposed at intervals and abutting against the cams in a one-to-one correspondence.

4. The positioning fixture according to claims 2 and 3, wherein the pushing member and the movable plate are of an integral structure, and one end of the side wall of the movable plate, which is opposite to the cam, is concave-convex outwards to form the pushing member.

5. The positioning fixture according to claim 2, wherein the first clamping block is detachably connected to the cam, and the second clamping block is detachably connected to the movable plate.

6. The positioning jig of claim 2, wherein the cam assembly further comprises a base and a mounting base, the cam being rotatably mounted on the mounting base, a lower end of the mounting base being slidably connected to the base, and an upper end of the mounting base being connected to the first clamping block.

7. The positioning fixture according to claim 2, wherein the cam assembly further comprises an elastic member, the elastic member is disposed between the first clamping block and the bottom plate or the base plate, and between the second clamping block and the base plate or the top plate, and is configured to constantly drive the first clamping block and the second clamping block to move linearly in a direction approaching the contour groove.

8. The positioning fixture according to claim 2, wherein a receiving groove is formed at a center of the substrate, a first through hole and a second through hole communicated with the receiving groove are formed on a top wall of the substrate, a first penetrating hole and a second penetrating hole are formed at positions of the top plate corresponding to the first through hole and the second through hole, the bottom plate is assembled to the notch of the receiving groove, so that the movable plate is slidably inserted into the receiving groove, the first clamping block penetrates through the first through hole and then penetrates through the first penetrating hole, the second clamping block penetrates through the second through hole and then penetrates through the second penetrating hole, and a third through hole communicated with the receiving groove is further formed on a side wall of the substrate.

9. The positioning fixture according to claim 1, wherein the top plate further has a first positioning element, a second positioning element and a third positioning element spaced apart from each other and disposed at an edge of the contour groove, and the first positioning element, the second positioning element and the third positioning element are used for positioning references of the workpiece in the contour groove along an X-axis direction, a Y-axis direction and a Z-axis direction.

10. The positioning fixture according to claim 1, wherein the bottom plate has a linear guide rail at each of the front and rear opposite ends thereof, the movable plate is slidably disposed on the linear guide rails, the bottom plate or the base plate further has a stop member along the sliding direction of the movable plate, and a stop member is protrudingly disposed at a side end of the movable plate and engaged with the stop member.