CN112296703A - Self-positioning four-point positioning device - Google Patents

Self-positioning four-point positioning device Download PDF

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Publication number
CN112296703A
CN112296703A CN202011221954.7A CN202011221954A CN112296703A CN 112296703 A CN112296703 A CN 112296703A CN 202011221954 A CN202011221954 A CN 202011221954A CN 112296703 A CN112296703 A CN 112296703A
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Prior art keywords
guide
moving block
block
wedge
guide part
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CN202011221954.7A
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CN112296703B (en
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宋爱平
潘建州
闫创
卢重望
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Yangzhou University
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Yangzhou University
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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
    • 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
    • B23Q2703/00—Work clamping
    • B23Q2703/02—Work clamping means
    • B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Machine Tool Units (AREA)

Abstract

The invention discloses a self-positioning four-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 baffle plate, the baffle plate is provided with two guide ports arranged at intervals in the height direction, 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 baffle plate is connected with two upper clamping rollers arranged at intervals in the left and right direction, the lower wedge extending out of the baffle plate is connected with two lower clamping rollers arranged at intervals in the left and right direction, the inner guide plate is connected with a driving assembly for driving the upper guide part and the lower guide part to synchronously move in opposite directions, and the two upper clamping rollers and the lower clamping rollers can clamp a workpiece; the invention realizes point contact when clamping and positioning, and the clamping is reliable.

Description

Self-positioning four-point positioning device
Technical Field
The invention belongs to the technical field of lathe machining, and particularly relates to a self-positioning four-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 four-point positioning device.
The purpose of the invention is realized as follows: a self-positioning four-point positioning device comprises an inner guide plate fixed on a machine tool, wherein one end of the inner guide plate in the left and right directions is connected with a baffle, the baffle is provided with two guide ports arranged at intervals in the height direction, 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 comprises an upper liftable guide part, one side of the upper guide part, facing inwards, is provided with an upper connecting part, one end, far away from the upper guide part, of the upper connecting part horizontally extends out of the baffle along the guide port above, the lower wedge comprises a lower liftable guide part, one end, far away from the lower guide part, of the lower guide part, horizontally extends out of the baffle along the guide port below, the inner guide plate is connected with a driving assembly which drives the upper guide part and the lower guide part to synchronously move in opposite directions, the workpiece clamping device is characterized in that an upper connecting seat extending downwards is connected to the upper connecting portion, a lower connecting seat extending upwards is connected to the lower connecting portion, two upper clamping rollers arranged at intervals in the left-right direction are connected to the upper connecting seat, two lower clamping rollers arranged at intervals in the left-right direction are connected to the lower connecting seat, and workpieces can be clamped by the two upper clamping rollers and the lower clamping rollers.
In the invention, the upper connecting part can be lifted in the upper guide port, and the lower connecting part can be lifted in the lower guide port; the driving assembly acts to enable the upper guide part and the lower guide part to synchronously move upwards and downwards respectively, the positioning radius between the upper clamping roller and the lower clamping roller is expanded, a workpiece to be machined is placed in the upper clamping roller and the lower clamping roller, the driving assembly acts in a reverse direction, the upper clamping roller moves downwards, meanwhile, the lower clamping roller moves upwards, the positioning radius is reduced until the workpiece to be machined is clamped, the driving assembly stops acting, point contact is formed between the two upper clamping rollers and the two lower clamping rollers and the workpiece in the cutting process of the workpiece, the friction force is reduced, and the machining quality of the surface of the workpiece is improved; the method can be applied to the work of positioning the workpiece during machining.
In order to realize the lifting of the upper guide part and the lower guide part, the driving assembly comprises a moving block which is connected to the inner guide plate in a sliding manner, the moving block can horizontally slide in the left-right direction, the upper end of the moving block can just slide along the inclined plane at the upward end of the upper guide part, and the lower end of the moving block can just slide along the inclined plane at the downward end of the lower guide part.
In order to improve the lifting reliability of the upper guide part and the lower guide part, the upper end and the lower end of the moving block are fixedly connected with inclined guide plates, the upper inclined guide plate is attached to the inclined surface of the upper guide part, and the lower inclined guide plate is attached to the inclined surface of the lower guide part.
In order to further improve the lifting reliability of the upper guide part and the lower guide part, an upper sliding groove and a lower sliding groove which are obliquely arranged are respectively formed in the upper guide part and the lower guide part, an upper limiting guide block is slidably arranged on the upper guide part through the upper sliding groove, a lower limiting guide block is slidably arranged on the lower guide part through the lower sliding groove, the upper part of the moving block is connected with the upper limiting guide block, the lower part of the moving block is connected with the lower limiting guide block, the sliding direction of the upper limiting guide block is parallel to the direction of the inclined plane of the upper guide part, and the sliding direction of the lower limiting guide block is parallel to the direction of the inclined plane of the lower guide part.
In order to further realize the movement of the moving block, linear drivers are respectively and fixedly connected to the inner guide plates above and below the moving block, the linear drivers are connected with driving rods which can extend towards the other end of the inner guide plates in the left-right direction and can perform reciprocating linear movement in the left-right direction, the outer ends of the two driving rods are connected with a cross beam push rod, the moving block is provided with a connecting groove relative to one end of the cross beam push rod, one end of the cross beam push rod extending towards the moving block is inserted into the connecting groove, the cross beam push rod is provided with a sliding groove, one end of the moving block, far away from the upper wedge, is provided with a connecting hole, and the connecting pin sequentially penetrates through the connecting hole and the sliding; in the design, a front linear driver is used for acting, so that the driving rod continuously extends outwards, when the shortest end of a sliding groove in a beam push rod is in contact with a connecting pin, a moving block can horizontally move rightwards under the action of the beam push rod, the moving block generates an upward oblique component force for an upper sliding groove of an upper wedge, and generates a downward oblique component force for a lower sliding groove of a lower wedge, so that the upper wedge vertically moves upwards, the lower wedge vertically moves downwards, the upper wedge and the lower wedge respectively drive an upper clamping roller and a lower clamping roller to move, and the expansion of the positioning radius formed between the upper clamping roller and the lower clamping roller is realized.
In order to further realize automatic positioning of a workpiece, one outward side of each of the upper limiting guide block and the lower limiting guide block 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 support 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 support 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 support 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, the positioning radius is enlarged, and if the profile radius of the workpiece is reduced, the reset spring automatically resets.
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 first perspective view of the present invention.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a second perspective view of the present invention.
Fig. 5 is a partially enlarged view of B in fig. 4.
Fig. 6 is a partially enlarged view at C in fig. 4.
The device comprises a lower wedge 1, a lower guide part 101, a lower connecting part 102, a lower connecting seat 2, a lower clamping roller 3, an upper clamping roller 4, an upper connecting seat 5, an upper wedge 6, an upper connecting part 601, an upper guide part 602, a driving component 7, a guide rod 701, a linear driver 702, a moving block 703, a guide rail 704, a cross beam push rod 705, a sliding groove 706, a connecting pin 707, a reset spring 708, a slope guide plate 709, a top plate 710, a guide support block 711, a guide hole 712, an inner guide plate 8, a baffle 9, an upper sliding groove 10, a lower sliding groove 11, an upper limiting guide block 12, a lower sliding block 13, a lower fixing seat 14, an upper fixing seat 15, an upper sliding block 16, a lower limiting guide block 17, a lower lifting groove 18 and a guide opening 19.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 6, a self-positioning four-point positioning device comprises an inner guide plate 8 fixed on a machine tool, a baffle plate 9 is connected to one end of the inner guide plate 8 in the left-right direction, two guide openings 19 arranged at intervals in the height direction are arranged on the baffle plate 9, an upper inclined wedge 6 and a lower inclined wedge 1 which can slide in the height direction and are oppositely arranged in the height direction are respectively connected to the upper part and the lower part of the inner guide plate 8, the upper inclined wedge 6 comprises an upper lifting guide part 602, an upper connecting part 601 is arranged on the inward side of the upper guide part 602 relative to the baffle plate 9, one end of the upper connecting part 601 far away from the upper guide part 602 horizontally extends out of the baffle plate 9 along the upper guide opening 19, the lower inclined wedge 1 comprises a lower lifting guide part 101, a lower connecting part 102 is arranged on the inward end of the lower guide part 101 relative to the baffle plate 9, one end of the lower connecting part 102 far away from the lower guide part 101 horizontally extends out of, the inner guide plate 8 is connected with a driving component 7 which drives the upper guide part 602 and the lower guide part 101 to synchronously move in opposite directions, the upper connecting seat 5 which extends downwards is connected with the upper connecting part 601, the lower connecting seat 2 which extends upwards is connected with the lower connecting part 102, the upper connecting seat 5 is connected with two upper clamping rollers 4 which are arranged at intervals in the left-right direction, the lower connecting seat 2 is connected with two lower clamping rollers 3 which are arranged at intervals in the left-right direction, and the two upper clamping rollers 4 and the lower clamping rollers 3 can clamp workpieces tightly.
In order to realize the lifting of the upper guide part 602 and the lower guide part 101, the driving assembly 7 comprises a moving block 703 slidably connected to the inner guide plate 8, the moving block 703 can horizontally slide in the left-right direction, a guide rail 704 is fixedly connected to the inner guide plate 8, the moving block 703 is slidably connected to the guide rail 704, the upper end of the moving block 703 can slide along the inclined plane of the upward end of the upper guide part 602, the lower end of the moving block 703 can slide along the inclined plane of the downward end of the lower guide part 101, the upper end and the lower end of the moving block 703 are both fixedly connected with inclined guide plates 709, the inclined guide plates 709 are made of brass, the friction force between the moving block 703 and the inclined wedges is reduced, the upper inclined guide plate 709 is attached to the inclined plane of the upper guide part 602, and the lower inclined guide plate 709 is attached to; an upper sliding groove 10 and a lower sliding groove 11 which are obliquely arranged are respectively arranged on the upper guide part 602 and the lower guide part 101, an upper limit guide block 12 is slidably arranged on the upper guide part 602 through the upper sliding groove 10, a lower limit guide block 17 is slidably arranged on the lower guide part 101 through the lower sliding groove 11, the upper part of the moving block 703 is connected with the upper limit guide block 12, the lower part of the moving block 703 is connected with the lower limit guide block 17, the sliding direction of the upper limit guide block 12 is parallel to the direction of the inclined plane of the upper guide part 602, and the sliding direction of the lower limit guide block 17 is parallel to the direction of the inclined plane of the lower guide part 101; the upper wedge 6 and the lower wedge 1 are disposed symmetrically with respect to the center of the moving block 703 in the height direction.
In order to further realize the movement of the moving block 703, linear drivers 702 are fixedly connected to the inner guide plates 8 above and below the moving block 703 respectively, the linear drivers 702 are preferably electric push rods, the linear drivers 702 are connected with driving rods which can extend towards the other ends of the inner guide plates 8 in the left-right direction and can perform reciprocating linear movement in the left-right direction, the outer ends of the two driving rods are connected with a beam push rod 705, one end of the moving block 703, which is opposite to the beam push rod 705, is provided with a connecting groove, one end of the beam push rod 705, which extends towards the moving block 703, is inserted into the connecting groove, the beam push rod 705 is provided with a sliding groove 706, one end of the moving block 703, which is far away from the upper wedge 6, is provided with a connecting hole, and the moving block 703.
In order to further improve the lifting stability of the upper wedge 6 and the lower wedge 1, the upper portion of the inner guide plate 8 is fixedly connected with an upper fixed seat 15, the lower portion of the inner guide plate 8 is fixedly connected with a lower fixed seat 14, an upper lifting groove is formed in the upper fixed seat 15, a lower lifting groove 18 is formed in the lower fixed seat 14, the upper fixed seat 15 is slidably connected with an upper sliding block 16 through the upper lifting groove, the lower fixed seat 14 is slidably connected with a lower sliding block 13 through the lower lifting groove 18, an upper guide portion 602 is fixedly connected with the upper sliding block 16, and a lower guide portion 101 is fixedly connected with the lower sliding block 13.
In order to further realize the automatic positioning of the workpiece, a top plate 710 is fixedly connected to one outward side of the upper limiting guide block 12 and one outward side of the lower limiting guide block 17, a guide rod 701 is connected to the top plate 710, a return spring 708 is sleeved on the guide rod 701, two guide support blocks 711 arranged at intervals in the height direction are connected to an inner guide plate 8 of the top plate 710 in the outward direction relative to one end of the cross beam push rod 705, guide holes 712 are formed in the guide support blocks 711, the guide rods 701 can horizontally slide along the corresponding guide holes 712 in the left-right direction, and the return spring 708 is arranged between the top plate 710 and the guide support blocks 711.
In the invention, the upper connecting part 601 can be lifted in the upper guide opening 19, the lower connecting part 102 can be lifted in the lower guide opening 19, and the upper clamping roller 4 and the lower clamping roller 3 are preferably made of nylon materials; firstly, an inner guide plate 8 is installed and fixed on a machine tool guide rail 704 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 704 along with a turning tool, before the tool changing frame is used, a linear driver 702 acts to extend a driving rod rightwards, a beam push rod 705 horizontally moves rightwards under the pushing of the driving rod, when the leftmost end of a sliding groove 706 in the beam push rod 705 is contacted with a connecting pin 707, a moving block 703 can horizontally move rightwards under the action of the beam push rod 705, at the moment, a return spring 708 is compressed under the action of a top plate 710, an upper limiting guide block 12 which is connected with the moving block 703 and embedded in an upper sliding groove 10 horizontally moves rightwards under the driving of the moving block 703, at the moment, the upper limiting guide block 12 generates an oblique component force to the upper sliding groove 10 on an upper wedge 6, so that the upper wedge 6 and the upper limiting, similarly, the lower inclined wedge 1 and the lower limiting guide block 17 connected with the lower inclined wedge move vertically downwards to realize the expansion of the positioning radius; when the invention is used for clamping the slender rod piece, the linear driver 702 reversely acts to reset the driving rod, at this time, the moving block 703 is only subjected to the elastic force of the reset spring 708 and horizontally moves to the left under the action of the reset spring 708, the upper inclined guide plate 709 on the moving block 703 generates a component force which is downward inclined to the upper surface of the upper inclined wedge 6, so that the upper inclined wedge 6 and the upper limiting guide block 12 connected with the upper inclined wedge 6 vertically move downward along the upper lifting groove fixed on the inner guide plate 8, similarly, the lower inclined wedge 1 and the lower limiting guide block 17 connected with the lower inclined wedge 1 vertically move upward along the lower lifting groove 18 fixed on the inner guide plate 8, the upper clamping roller 4 moves downward, the lower clamping roller 3 moves upward until clamping the workpiece, if the contour radius of the workpiece is enlarged, the reset spring 708 is stressed and compressed to enlarge the positioning radius, if the contour radius of the workpiece is reduced, the reset spring 708 automatically resets to reduce the positioning radius; 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; in the working process, point contact is formed between the two upper clamping rollers 4 and the two lower clamping rollers 3 and the workpiece, so that the friction force is reduced, and the processing quality of the surface of the workpiece is improved; 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)

1.一种自定位四点定位装置，其特征在于，包括固定在机床上的内导向板，所述内导向板在左右方向上的一端连接有挡板，所述挡板上开有在高度方向上间隔设置的两个导向口，所述内导向板的上部和下部分别连接有可在高度方向上滑动且在高度方向上相对设置的上斜楔和下斜楔，所述上斜楔包括可升降的上导向部，上导向部相对挡板朝里的一侧设有上连接部，所述上连接部远离上导向部的一端沿着上面的导向口水平伸出挡板外，所述下斜楔包括可升降的下导向部，下导向部相对挡板朝里的一端设有下连接部，所述下连接部远离下导向部的一端沿着下面的导向口水平伸出挡板外，所述内导向板上连接有驱动上导向部和下导向部同步往相反方向移动的驱动组件，所述上连接部上连接有向下伸出的上连接座，下连接部上连接有向上伸出的下连接座，所述上连接座上连接有两个在左右方向上间隔设置的上夹持滚轮，所述下连接座上连接有两个在左右方向上间隔设置的下夹持滚轮，所述两个上夹持滚轮和下夹持滚轮可将工件夹紧。1. A self-positioning four-point positioning device, characterized in that it comprises an inner guide plate fixed on the machine tool, one end of the inner guide plate in the left-right direction is connected with a baffle plate, and a Two guide ports are arranged at intervals in the direction, the upper and lower parts of the inner guide plate are respectively connected with an upper wedge and a lower wedge that can slide in the height direction and are oppositely arranged in the height direction, and the upper wedge includes The upper guide part that can be raised and lowered, the upper guide part is provided with an upper connecting part on the inward side of the baffle plate, and the end of the upper connecting part far away from the upper guide part extends horizontally out of the baffle along the upper guide port; The inclined wedge includes a lower guide part that can be lifted and lowered, and the end of the lower guide part facing inward relative to the baffle is provided with a lower connecting part, and one end of the lower connecting part away from the lower guide part horizontally extends out of the baffle along the lower guide port, so The inner guide plate is connected with a drive assembly that drives the upper guide portion and the lower guide portion to move in opposite directions synchronously, the upper connecting portion is connected with an upper connecting seat extending downward, and the lower connecting portion is connected with an upwardly extending The lower connecting seat is connected with two upper clamping rollers arranged at intervals in the left and right directions, and the lower connecting seat is connected with two lower clamping rollers arranged at intervals in the left and right directions, so The two upper and lower clamping rollers can clamp the workpiece. 2.根据权利要求1所述的一种自定位四点定位装置，其特征在于，所述驱动组件包括可滑动地连接在内导向板上的移动块，所述移动块可在左右方向上水平滑动，所述移动块的上端可刚好沿着上导向部朝上一端的斜面滑动，同时移动块的下端可刚好沿着下导向部朝下一端的斜面滑动。2 . The self-positioning four-point positioning device according to claim 1 , wherein the driving assembly comprises a moving block slidably connected to the inner guide plate, and the moving block can be horizontal in the left-right direction. 3 . When sliding, the upper end of the moving block can just slide along the inclined surface of the upper end of the upper guide part, while the lower end of the moving block can just slide along the inclined surface of the lower guide part. 3.根据权利要求2所述的一种自定位四点定位装置，其特征在于，所述移动块的上下两端均固定连接有斜面导向板，上面的斜面导向板贴合在上导向部的斜面上，下面的斜面导向板贴合在下导向部的斜面上。3 . The self-positioning four-point positioning device according to claim 2 , wherein the upper and lower ends of the moving block are fixedly connected with inclined surface guide plates, and the upper inclined surface guide plates are attached to the upper and lower guide parts of the upper guide part. 4 . On the inclined surface, the lower inclined surface guide plate is attached to the inclined surface of the lower guide part. 4.根据权利要求3所述的一种自定位四点定位装置，其特征在于，所述上导向部和下导向部上分别开有倾斜设置的上滑动槽和下滑动槽，所述上导向部经上滑动槽可滑动地设有上限位导向块，下导向部经下滑动槽可滑动地设有下限位导向块，所述移动块的上部与上限位导向块连接，移动块的下部与下限位导向块连接，上限位导向块的滑动方向与上导向部的斜面所在方向平行，下限位导向块的滑动方向与下导向部的斜面所在方向平行。4 . The self-positioning four-point positioning device according to claim 3 , wherein the upper guide part and the lower guide part are respectively provided with an upper sliding groove and a lower sliding groove arranged obliquely, and the upper guide The upper part is slidably provided with an upper limit guide block through the upper sliding groove, and the lower guide part is slidably provided with a lower limit guide block through the lower sliding groove. The upper part of the moving block is connected with the upper limit guide block, and the lower part of the moving block is connected with The lower limit guide block is connected, the sliding direction of the upper limit guide block is parallel to the direction of the inclined surface of the upper guide part, and the sliding direction of the lower limit guide block is parallel to the direction of the inclined surface of the lower guide part. 5.根据权利要求3所述的一种自定位四点定位装置，其特征在于，所述移动块的上方和下方的内导向板上分别固定连接有直线驱动器，所述直线驱动器上连接有可朝着内导向板在左右方向上的另一端伸出且可在左右方向上做往复直线移动的驱动杆，两个驱动杆的外端连接有横梁推杆，所述移动块相对横梁推杆的一端开有连接槽，所述横梁推杆朝着移动块所在方向伸出的一端插进连接槽内，横梁推杆上开有滑槽，所述移动块远离上斜楔的一端开有连接孔，使用连接销依次穿过连接孔和滑槽将移动块和横梁推杆连接在一起。5 . The self-positioning four-point positioning device according to claim 3 , wherein a linear driver is fixedly connected to the inner guide plates above and below the moving block, and a linear driver is connected to the linear driver. 6 . A drive rod that protrudes toward the other end of the inner guide plate in the left-right direction and can reciprocate linearly in the left-right direction. A connecting groove is opened at one end, the end of the beam push rod that protrudes toward the direction of the moving block is inserted into the connecting groove, a sliding groove is opened on the beam push rod, and a connecting hole is opened at the end of the moving block away from the upper wedge , use the connecting pin to pass through the connecting hole and the chute to connect the moving block and the beam push rod together. 6.根据权利要求5所述的一种自定位四点定位装置，其特征在于，所述上限位导向块和下限位导向块朝外的一侧分别固定连接有顶板，所述顶板上连接有导杆，导杆上套装有复位弹簧，所述顶板相对横梁推杆一端朝外方向的内导向板上连接有两个在高度方向上间隔设置的导向支撑块，所述导向支撑块上开有导向孔，所述导杆可在左右方向上分别沿着对应的导向孔水平滑动，所述复位弹簧在顶板和导向支撑块之间。6 . The self-positioning four-point positioning device according to claim 5 , wherein the outer side of the upper limit guide block and the lower limit guide block are respectively fixedly connected with a top plate, and the top plate is connected with a top plate. 7 . The guide rod is sleeved with a return spring, and two guide support blocks spaced in the height direction are connected to the inner guide plate with one end of the top plate facing the outward direction of the cross beam push rod, and the guide support blocks are provided with Guide holes, the guide rods can slide horizontally along the corresponding guide holes in the left and right directions respectively, and the return spring is between the top plate and the guide support block. 7.根据权利要求1～6任一项所述的一种自定位四点定位装置，其特征在于，所述内导向板的上部固定连接有上固定座，内导向板的下部固定连接有下固定座，所述上固定座上开有上升降槽，所述下固定座上开有下升降槽，上固定座经上升降槽可滑动地连接有上滑块，下固定座经下升降槽可滑动地连接有下滑块，所述上导向部与上滑块固定连接，所述下导向部与下滑块固定连接。7 . The self-positioning four-point positioning device according to claim 1 , wherein an upper fixing seat is fixedly connected to the upper part of the inner guide plate, and a lower part is fixedly connected to the lower part of the inner guide plate. 8 . A fixed seat, the upper fixed seat is provided with an upper lifting groove, the lower fixed seat is provided with a lower lifting groove, the upper fixed seat is slidably connected with the upper sliding block through the upper lifting groove, and the lower fixed seat is connected with the lower lifting groove. A lower slider is slidably connected, the upper guide portion is fixedly connected with the upper slider, and the lower guide portion is fixedly connected with the lower slider. 8.根据权利要求1～6任一项所述的一种自定位四点定位装置，其特征在于，所述上斜楔和下斜楔关于移动块在高度方向上的中心对称设置。8 . The self-positioning four-point positioning device according to claim 1 , wherein the upper wedge and the lower wedge are symmetrically arranged with respect to the center of the moving block in the height direction. 9 .
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