CN112318165A - Self-positioning three-point positioning device - Google Patents
Self-positioning three-point positioning device Download PDFInfo
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- CN112318165A CN112318165A CN202011221945.8A CN202011221945A CN112318165A CN 112318165 A CN112318165 A CN 112318165A CN 202011221945 A CN202011221945 A CN 202011221945A CN 112318165 A CN112318165 A CN 112318165A
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- block
- wedge
- guide
- guide plate
- moving block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/064—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding elongated workpieces, e.g. pipes, bars or profiles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a self-positioning three-point positioning device in the technical field of lathe processing, which comprises an inner guide plate fixed on a machine tool, wherein one end of the inner guide plate in the left and right direction is connected with a front baffle, the upper part and the lower part of the inner guide plate are respectively connected with an upper inclined wedge and a lower inclined wedge which can slide in the height direction, the upper inclined wedge extending out of the front baffle is connected with an upper clamping block extending downwards, the lower inclined wedge extending out of the front baffle is connected with a lower clamping block extending upwards, the inner guide plate is slidably connected with a movable block, the movable block can horizontally move in the left and right direction, one end of the movable block close to the front baffle is connected with a middle pressing block, one end of the middle pressing block extending out of the front baffle is connected with a side clamping block and an, the lower clamping block and the side clamping block can clamp the workpiece together, and when the moving block moves, the upper wedge and the lower wedge do opposite motion in the height direction; the invention realizes line contact when clamping and positioning, and the clamping is reliable.
Description
Technical Field
The invention belongs to the technical field of lathe machining, and particularly relates to a self-positioning three-point positioning device.
Background
When a slender shaft is machined, one end of the slender shaft is usually clamped by a three-jaw chuck, but the slender shaft is poor in rigidity and is subjected to the action of cutting force of a cutter in machining engineering, so that the vibration phenomenon is easily generated, the machining quality and precision of the surface of a workpiece are affected, and the slender shaft needs to be clamped and positioned in an auxiliary manner by a center frame.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the technical problem of difficult positioning and clamping in the prior art and provides a self-positioning three-point positioning device.
The purpose of the invention is realized as follows: a self-positioning three-point positioning device comprises an inner guide plate fixed on a machine tool, wherein one end of the inner guide plate in the left-right direction is connected with a front baffle, three guide ports arranged at intervals in the height direction are formed in the front baffle, the upper part and the lower part of the inner guide plate are respectively connected with an upper wedge and a lower wedge which can slide in the height direction and are oppositely arranged in the height direction, the upper wedge extending out of the front baffle along the uppermost guide port is connected with an upper clamping block extending downwards, the lower wedge extending out of the front baffle along the lowermost guide port is connected with a lower clamping block extending upwards, the inner guide plate is slidably connected with a moving block, the moving block can horizontally move in the left-right direction, one end, close to the front baffle, of the moving block is connected with an intermediate pressing block, one end, extending out of the front baffle, of the intermediate pressing block along the intermediate guide port is connected with a side clamping block, the upper clamping block, the lower clamping block and the side clamping blocks can clamp a workpiece together, and when the moving block moves, the upper wedge and the lower wedge do opposite movement in the height direction.
In the invention, the upper inclined wedge can lift in the uppermost guide port, and the lower inclined wedge can lift in the lowermost guide port; the moving block moves rightwards, so that the upper wedge and the lower wedge move upwards and downwards synchronously respectively, the upper clamping block, the lower clamping block and the side clamping blocks expand, when a workpiece needs to be clamped, the moving block moves reversely, the upper clamping block moves downwards, the lower clamping block moves upwards, the side clamping blocks move leftwards, and the three clamping blocks clamp until the clamping blocks are in contact with the workpiece; the invention realizes line contact when clamping and positioning, and the clamping is reliable; the method can be applied to the work of positioning the workpiece during machining.
In order to realize the lifting of the upper wedge and the lower wedge, the upper wedge is provided with an upper connecting groove, the lower wedge is provided with a lower connecting groove, the upper part and the lower part of one end of the middle pressing block, which is far away from the side clamping block, are respectively arranged in the upper connecting groove and the lower connecting groove, the upward end of the middle pressing block is attached to the first inclined plane of the upper inclined wedge, the downward end of the middle pressing block is attached to the second inclined plane of the lower inclined wedge, the projection of one end of the middle pressing block, which is far away from the side clamping block, in the front-back direction is an isosceles right triangle, an upper inclined plane guide plate is fixedly connected with the upward end of the moving block, the upper inclined plane guide plate is attached to an upper inclined plane at the upward end of the upper inclined wedge, a lower inclined plane guide plate is fixedly connected with the downward end of the moving block, the lower inclined plane guide plate is attached to a lower inclined plane at the downward end of the lower inclined wedge, and the ends of the upper inclined wedge and the lower inclined wedge, which are far away from the upper clamping block, are both in the moving block; in the design, when the moving block drives the middle pressing block to move rightwards, the upper end of the middle pressing block generates a component force towards the upper right side to the upper inclined wedge, the lower end of the middle pressing block generates a component force towards the lower right side with the same magnitude to the lower inclined wedge, the upper inclined wedge and the lower inclined wedge do vertical back-to-back movement under the action of the component force, one end of the middle pressing block, far away from the clamping block, is arranged in an isosceles triangle shape, the horizontal moving distance of the side clamping block and the vertical moving distance of the upper clamping block and the lower clamping block are ensured to be the same, and the expansion action of; when a workpiece needs to be positioned and clamped, the moving block moves leftwards, the lateral clamping block moves leftwards along with the same principle, the upper clamping block and the lower clamping block move vertically and oppositely, and clamping actions of the three clamping blocks are realized until the three clamping blocks are contacted with the workpiece.
In order to further realize the left and right movement of the middle pressing block, the upper end and the lower end of the moving block are respectively provided with a middle guide block, the moving block is provided with a groove, one end of the middle guide block, which is opposite to the moving block in the height direction, is provided with a bulge matched with the corresponding groove, the upper middle guide block is connected with the upper part of the middle pressing block, and the lower middle guide block is connected with the upper part of the middle pressing block.
In order to realize the movement of the moving block, linear drivers are fixedly connected to the inner guide plates above and below the moving block respectively, driving rods extending towards the direction of the other end of the inner guide plate in the left-right direction are connected to the linear drivers, the outer ends of the two driving rods are connected with beam push rods, and the beam push rods are connected with the moving block.
In order to further realize the connection between the beam push rod and the moving block, one end of the moving block, which is opposite to the beam push rod, is provided with a side connecting groove, one end, which extends towards the moving block, of the beam push rod is inserted into the side connecting groove, the beam push rod is provided with a sliding groove, one end, which is far away from the front baffle, of the moving block is provided with a connecting hole, and the moving block and the beam push rod are connected together by sequentially penetrating through the connecting hole and the sliding groove through a connecting; in the design, the front linear driver is used for acting, the driving rod continuously extends outwards, and when the shortest end of the sliding groove in the cross beam push rod is contacted with the connecting pin, the moving block can horizontally move rightwards under the action of the cross beam push rod.
In order to further realize automatic positioning of a workpiece, one outward side of each of the upper inclined guide plate and the lower inclined guide plate is fixedly connected with a top plate, a guide rod is connected to the top plate, a return spring is sleeved on the guide rod, two guide supporting blocks arranged at intervals in the height direction are connected to an inner guide plate of the top plate in the outward direction relative to one end of a push rod of the cross beam, guide holes are formed in the guide supporting blocks, the guide rods can horizontally slide along the corresponding guide holes in the left and right directions, and the return spring is arranged between the top plate and the guide supporting blocks; in the design, when the connecting pin is in contact with the leftmost end of the sliding groove, the reset spring is in a compressed state, when a slender rod piece is clamped, the linear driver reversely moves, the driving rod moves leftwards, the moving block only receives the elastic force of the reset spring, the moving block horizontally moves leftwards under the action of the reset spring, the inclined guide plate at the upper end of the moving block can generate an inclined component force for the inclined surface of the upper inclined wedge, the inclined guide plate at the lower end of the moving block can generate an inclined component force for the inclined surface of the lower inclined wedge, so that the upper inclined wedge vertically moves downwards, the lower inclined wedge vertically moves upwards until a workpiece is clamped, in the machining process, if the profile radius of the workpiece is enlarged, the reset spring is stressed and compressed, so that the three clamping blocks automatically expand, and if the profile radius of the workpiece is reduced, the reset spring automatically resets, so.
In order to further improve the stationarity that goes up the slide wedge and go up and down the slide wedge lift, the upper portion fixedly connected with of interior deflector goes up the fixing base, and the lower part fixedly connected with of interior deflector is down the fixing base, it has last lift groove to go up to open on the fixing base, it has lower lift groove to open on the fixing base down, goes up the fixing base and is connected with the top shoe through going up lift groove slidable, and lower fixing base is connected with down the slider through going up lift groove slidable, go up guide part and top shoe fixed connection, guide part and lower slider fixed connection down.
In order to further realize synchronous reverse movement of the upper wedge and the lower wedge, the upper wedge and the lower wedge are symmetrically arranged relative to the center of the moving block in the height direction.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a front view of the present invention with the outer guide plate hidden.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a first perspective view of the present invention with the outer guide plate hidden.
Fig. 5 is a partially enlarged view of B in fig. 4.
Fig. 6 is a second perspective view of the present invention with the outer guide plate hidden.
The device comprises a lower connecting groove 1, a lower wedge 2, a lower clamping block 3, a side clamping block 4, an upper clamping block 5, an upper wedge 6, a middle pressing block 7, an upper connecting groove 8, an inner guide plate 9, a moving block 10, a guide supporting block 11, a cross beam push rod 12, a sliding groove 13, a linear driver 14, a middle guide block 15, a bulge 16, a lower inclined guide plate 17, a lower fixed seat 18, a lower sliding block 19, an upper fixed seat 20, an upper sliding block 21, an upper inclined guide plate 22, a top plate 23, a reset spring 24, a guide rod 25, a drive rod 26, a lower inclined guide plate 27, an upper inclined guide plate 28, an outer guide plate 29 and a connecting pin 30.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 6, a self-positioning three-point positioning device comprises an inner guide plate 9 fixed on a machine tool, wherein one end of the inner guide plate 9 in the left-right direction is connected with a front baffle plate, the front baffle plate is provided with three guide ports arranged at intervals in the height direction, the upper part and the lower part of the inner guide plate 9 are respectively connected with an upper inclined wedge 6 and a lower inclined wedge 2 which can slide in the height direction and are oppositely arranged in the height direction, the upper inclined wedge 6 extending out of the front baffle plate along the uppermost guide port is connected with an upper clamping block 5 extending downwards, the lower inclined wedge 2 extending out of the front baffle plate along the lowermost guide port is connected with a lower clamping block 3 extending upwards, the inner guide plate 9 is slidably connected with a moving block 10, the moving block 10 can horizontally slide in the left-right direction, the upper inclined wedge 6 and the lower inclined wedge 2 are symmetrically arranged relative to the center of the moving block 10 in the height direction, the moving block 10 can horizontally move in the left-right direction, one end, close to the front baffle, of the moving block 10 is connected with the middle pressing block 7, one end, extending out of the front baffle, of the middle pressing block 7 along a middle guide port is connected with the side clamping block 4, the upper clamping block 5, the lower clamping block 3 and the side clamping block 4 can clamp a workpiece together, and when the moving block 10 moves, the upper wedge 6 and the lower wedge 2 do opposite movement in the height direction.
In order to realize the lifting of the upper inclined wedge 6 and the lower inclined wedge 2, the upper inclined wedge 6 is provided with an upper connecting groove 8, the lower inclined wedge 2 is provided with a lower connecting groove 1, the upper part and the lower part of one end of the middle pressing block 7, which is far away from the side clamping block 4, are respectively arranged in the upper connecting groove 8 and the lower connecting groove 1, the upward and downward end of the right end of the middle pressing block 7 is respectively connected with an upper inclined plane guide sheet 28 and a lower inclined plane guide sheet 27, the upward end of the upper inclined plane guide sheet 28 is attached to the first inclined plane of the upper inclined wedge 6, the downward end of the lower inclined plane guide sheet 27 is attached to the second inclined plane of the lower inclined wedge 2, the front-back projection of one end of the middle pressing block 7, which is far away from the side clamping block 4, is in an isosceles right triangle shape, the upward end of the moving block 10 is fixedly connected with an upper inclined plane guide plate 22, the upward end of the upper inclined plane, the lower inclined plane guide plate 17 is attached to a lower inclined plane at the downward end of the lower inclined wedge 2, and the ends of the upper inclined wedge 6 and the lower inclined wedge 2 far away from the upper clamping block 5 are both arranged in the moving block 10; the upper end and the lower end of the moving block 10 are respectively provided with a middle guide block 15, the moving block 10 is provided with a groove, one end of the middle guide block 15, which is opposite to the moving block 10 in the height direction, is provided with a bulge 16 matched with the corresponding groove, the upper middle guide block 15 is connected with the upper part of the middle pressing block 7, and the lower middle guide block 15 is connected with the upper part of the middle pressing block 7.
In order to further improve the lifting stability of the upper wedge 6 and the lower wedge 2, the upper portion of the inner guide plate 9 is fixedly connected with an upper fixed seat 20, the lower portion of the inner guide plate 9 is fixedly connected with a lower fixed seat 18, an upper lifting groove is formed in the upper fixed seat 20, a lower lifting groove is formed in the lower fixed seat 18, the upper fixed seat 20 is slidably connected with an upper sliding block 21 through the upper lifting groove, the lower fixed seat 18 is slidably connected with a lower sliding block 19 through the lower lifting groove, an upper guide portion is fixedly connected with the upper sliding block 21, and the lower guide portion is fixedly connected with the lower sliding block 19.
In order to realize the movement of the moving block 10, linear drivers 14 are fixedly connected to the inner guide plates 9 above and below the moving block 10 respectively, driving rods 26 extending towards the other ends of the inner guide plates 9 in the left-right direction are connected to the linear drivers 14, the outer ends of the two driving rods 26 are connected with cross beam push rods 12, the cross beam push rods 12 are connected with the moving block 10, the connection structure of the cross beam push rods 12 and the moving block 10 specifically comprises that a side connection groove is formed in one end, opposite to the cross beam push rods 12, of the moving block 10, one end, extending towards the moving block 10, of the cross beam push rods 12 is inserted into the side connection groove, a sliding groove 13 is formed in the cross beam push rods 12, a connection hole is formed in one end, far away from a front baffle, of the moving block 10, and.
In order to further realize the automatic positioning of the workpiece, one outward side of the upper inclined guide plate 22 and one outward side of the lower inclined guide plate 17 are respectively and fixedly connected with a top plate 23, the top plate 23 is connected with a guide rod 25, the guide rod 25 is sleeved with a return spring 24, two guide supporting blocks 11 which are arranged at intervals in the height direction are connected on the inner guide plate 9 of the top plate 23 relative to one end of the cross beam push rod 12 in the outward direction, guide holes are formed in the guide supporting blocks 11, the guide rods 25 can respectively horizontally slide along the corresponding guide holes in the left and right directions, and the return spring 24 is arranged between the top plate 23 and the guide supporting blocks 11; in the design, when the connecting pin 30 contacts with the leftmost end of the sliding groove 13, the return spring 24 is in a compressed state, when clamping a slender rod piece, the linear driver 14 reversely acts, the driving rod 26 moves leftwards, the moving block 10 only receives the elastic force of the return spring 24, the moving block 10 horizontally moves leftwards under the action of the return spring 24, an inclined plane guide plate at the upper end of the moving block 10 generates an inclined downward component force on an inclined plane of the upper inclined wedge 6, an inclined plane guide plate at the lower end of the moving block 10 generates an inclined upward component force on an inclined plane of the lower inclined wedge 2, so that the upper inclined wedge 6 vertically moves downwards, the lower inclined wedge 2 vertically moves upwards until clamping a workpiece, and in the machining process, if the contour radius of the workpiece is enlarged, the return spring 24 is stressed and compressed, so that the three clamping blocks automatically expand, and if the contour radius of the workpiece is reduced, the, so that the three clamping blocks are automatically clamped.
In the invention, the upper inclined wedge 6 can be lifted in the uppermost guide port, the lower inclined wedge 2 can be lifted in the lowermost guide port, the upper clamping block 5, the side clamping block 4 and the lower clamping block 3 are preferably made of copper materials, and the upper clamping block 5, the lower clamping block 3 and the side clamping block 4 are the same in shape and are all V-shaped; the front side of the front baffle is fixedly connected with an outer guide plate 29, and the linear driver 14 and the guide supporting block 11 are fixed between the inner guide plate 9 and the outer guide plate 29; firstly, an inner guide plate 9 is installed and fixed on a machine tool guide rail and is matched with a tool changing frame at the same time, so that the inner guide plate can slide along the machine tool guide rail along with a turning tool, before the tool changing frame is used, a linear driver 14 acts to enable a driving rod 26 to extend out rightwards, a cross beam push rod 12 horizontally moves rightwards under the pushing of the driving rod 26, when the leftmost end of a chute 13 in the cross beam push rod 12 is in contact with a connecting pin 30, a moving block 10 can horizontally move rightwards under the action of the cross beam push rod 12, at the moment, a return spring 24 can be compressed under the action of a top plate 23, the upper end of a middle pressing block 7 generates a component force towards the upper right upper part on an upper inclined wedge 6, the lower end of the middle pressing block 7 generates a component force towards the lower inclined wedge 2 with the same size, the upper inclined wedge 6 and the lower inclined wedge 2 vertically move backwards under the action of the component force, the vertical moving distances of the upper clamping block 5 and the lower clamping block 3 are the same, so that the expansion action of the three clamping blocks is realized; when the workpiece needs to be positioned and clamped, the moving block 10 moves leftwards, the side clamping block 4 moves leftwards, the linear driver 14 reversely acts to reset the driving rod 26, the linear driver 14 stops acting, at this time, the moving block 10 only receives the elastic force of the reset spring 24, and moves horizontally to the left under the action of a return spring 24, an upper inclined guide plate 22 on the moving block 10 generates a component force which is inclined downwards to the upper surface of the upper inclined wedge 6, the upper inclined wedge 6 and the upper inclined plane guide plate 22 connected with the upper inclined wedge are enabled to vertically move downwards along an upper lifting groove fixed on the inner guide plate 9, and similarly, the lower inclined wedge 2 and the lower inclined plane guide plate 17 connected with the lower inclined plane guide plate are enabled to vertically move upwards along a lower lifting groove fixed on the inner guide plate 9, the upper clamping roller moves downwards, the lower clamping roller moves upwards, and clamping actions of the three clamping blocks are realized until the three clamping blocks are contacted with a workpiece; in the machining process, if the contour radius of the workpiece is enlarged, the reset spring 24 is stressed and compressed to expand the three clamping blocks, and if the contour radius of the workpiece is reduced, the reset spring 24 automatically resets to clamp the three clamping blocks; the automatic clamping device is ingenious in structure, can automatically position and clamp a workpiece, can automatically change the positioning radius according to the change of the external profile of the workpiece, saves the process time of repeated clamping and positioning, and greatly improves the production efficiency; the method can be applied to the work of positioning the workpiece during machining.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical solutions, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (8)
1. A self-positioning three-point positioning device is characterized by comprising an inner guide plate fixed on a machine tool, wherein one end of the inner guide plate in the left-right direction is connected with a front baffle, three guide ports arranged at intervals in the height direction are formed in the front baffle, the upper part and the lower part of the inner guide plate are respectively connected with an upper wedge and a lower wedge which can slide in the height direction and are oppositely arranged in the height direction, the upper wedge extending out of the front baffle along the uppermost guide port is connected with an upper clamping block extending downwards, the lower wedge extending out of the front baffle along the lowest guide port is connected with a lower clamping block extending upwards, a movable block is slidably connected on the inner guide plate and can horizontally move in the left-right direction, one end, close to the front baffle, of the movable block is connected with a middle pressing block, and one end, extending out of the front baffle, of the middle pressing block along the middle guide port is connected with a side clamping block, the upper clamping block, the lower clamping block and the side clamping blocks can clamp a workpiece together, and when the moving block moves, the upper wedge and the lower wedge do opposite movement in the height direction.
2. The self-positioning three-point positioning device of claim 1, wherein the upper wedge has an upper connecting groove and the lower wedge has a lower connecting groove, the upper part and the lower part of one end of the middle pressing block, which is far away from the side clamping block, are respectively arranged in the upper connecting groove and the lower connecting groove, the upward end of the middle pressing block is attached to the first inclined plane of the upper inclined wedge, the downward end of the middle pressing block is attached to the second inclined plane of the lower inclined wedge, the projection of one end of the middle pressing block, which is far away from the side clamping block, in the front-back direction is an isosceles right triangle, an upper inclined plane guide plate is fixedly connected with the upward end of the moving block, the upper inclined plane guide plate is attached to an upper inclined plane at the upward end of the upper inclined wedge, a lower inclined plane guide plate is fixedly connected with the downward end of the moving block, the lower inclined plane guide plate is attached to a lower inclined plane at the downward end of the lower inclined wedge, and the upper inclined wedge and the lower inclined wedge are both arranged in the moving block at the end far away from the upper clamping block.
3. The self-positioning three-point positioning device as claimed in claim 2, wherein the upper and lower ends of the moving block are respectively provided with a middle guide block, the moving block is provided with a groove, one end of the middle guide block, which is opposite to the moving block in the height direction, is provided with a protrusion which is matched with the corresponding groove, the upper middle guide block is connected with the upper part of the middle pressing block, and the lower middle guide block is connected with the upper part of the middle pressing block.
4. The self-positioning three-point positioning device according to claim 1, wherein the inner guide plates above and below the moving block are respectively and fixedly connected with a linear driver, the linear drivers are connected with driving rods extending towards the other end of the inner guide plates in the left-right direction, the outer ends of the two driving rods are connected with beam push rods, and the beam push rods are connected with the moving block.
5. The self-positioning three-point positioning device as claimed in claim 4, wherein one end of the moving block opposite to the cross beam push rod is provided with a side connecting groove, one end of the cross beam push rod extending towards the moving block is inserted into the side connecting groove, the cross beam push rod is provided with a sliding groove, one end of the moving block far away from the front baffle is provided with a connecting hole, and the moving block and the cross beam push rod are connected together by sequentially penetrating the connecting hole and the sliding groove through a connecting pin.
6. The self-positioning three-point positioning device according to claim 5, wherein the outward sides of the upper inclined guide plate and the lower inclined guide plate are fixedly connected with a top plate respectively, the top plate is connected with a guide rod, the guide rod is sleeved with a return spring, the inner guide plate of the top plate facing outward from one end of the push rod of the cross beam is connected with two guide support blocks arranged at intervals in the height direction, the guide support blocks are provided with guide holes, the guide rod can horizontally slide along the corresponding guide holes in the left-right direction respectively, and the return spring is arranged between the top plate and the guide support blocks.
7. The self-positioning three-point positioning device according to any one of claims 1 to 6, wherein an upper fixing seat is fixedly connected to an upper portion of the inner guide plate, a lower fixing seat is fixedly connected to a lower portion of the inner guide plate, an upper lifting groove is formed in the upper fixing seat, a lower lifting groove is formed in the lower fixing seat, an upper sliding block is slidably connected to the upper fixing seat through the upper lifting groove, a lower sliding block is slidably connected to the lower fixing seat through the lower lifting groove, the upper guide portion is fixedly connected to the upper sliding block, and the lower guide portion is fixedly connected to the lower sliding block.
8. The self-positioning three-point positioning device according to any one of claims 1 to 6, wherein the upper wedge and the lower wedge are symmetrically arranged with respect to the center of the moving block in the height direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011221945.8A CN112318165B (en) | 2020-11-05 | 2020-11-05 | Self-positioning three-point positioning device |
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| CN202011221945.8A CN112318165B (en) | 2020-11-05 | 2020-11-05 | Self-positioning three-point positioning device |
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| CN112318165B CN112318165B (en) | 2022-08-09 |
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