Linkage type four-point positioning mechanism

Abstract

The utility model relates to the technical field of positioning equipment, in particular to a linkage type four-point positioning mechanism which comprises a linkage base, a linkage sliding plate, two first connecting rods, two second connecting rods, two first sliding blocks, two first positioning pieces, two second sliding blocks, two second positioning pieces and a linkage driving mechanism used for driving the linkage sliding plate to reciprocate. One ends of the two first connecting rods are hinged to the linkage sliding plate, the other ends of the two first connecting rods are hinged to the other ends of the two first sliding blocks, one ends of the two second connecting rods are hinged to the linkage sliding plate, and the other ends of the two second connecting rods are hinged to the other ends of the two second sliding blocks. And a positioning space is formed between the two first positioning pieces and the two second positioning pieces. The linkage driving mechanism drives the two first positioning pieces and the two second positioning pieces to act synchronously, so that four-point positioning can be achieved, and the precision and stability of deviation rectifying and positioning of the target piece in the transverse direction can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning devices, in particular to a linkage four-point positioning mechanism. Background Technique

[0002] In industrial production, it is often necessary to position a target part to ensure that the position accuracy of the target part in the production process meets the production requirements. In the existing patents, the Chinese patent document with the application number 202121462792.6 discloses a four-side linkage positioning device, including a base cushion block, a jig component, and a driving component. The jig component is arranged on the top of the base cushion block. The jig component includes a jig base, a jig cushion plate, an acrylic jig, a first backrest adjustment block, a second backrest adjustment block, two first jig corner blocks, and two second jig corner blocks. The first backrest adjustment block and the second backrest adjustment block are installed at intervals on the top of the base cushion block. The jig base is slidably arranged on the tops of the first backrest adjustment block and the second backrest adjustment block. The jig cushion plate is installed on the top of the jig base. The acrylic jig is clamped on the top of the jig cushion plate. The two first jig corner blocks are respectively installed on the tops of the first backrest adjustment block and the second backrest adjustment block. The two second jig corner blocks are respectively installed on the tops of the first backrest adjustment block and the second backrest adjustment block. And the two first jig corner blocks and the two second jig corner blocks are arranged in a rectangle. The driving component is arranged at the bottom of the base cushion block. The driving component includes a limit block, a first corner block guide block, a second corner block guide block, a corner block collision block, a driving cylinder, two corner block fixing blocks, two first guide rails, two second guide rails, two driving connecting rods, and two third corner block guide blocks. The corner block collision block is slidably arranged at the bottom of the base cushion block. The driving cylinder, the limit block, the two first guide rails, and the two second guide rails are installed at intervals at the bottom of the base cushion block. And the output end of the driving cylinder is fixedly connected with the corner block collision block. The first corner block guide block and the second corner block guide block are respectively slidably arranged at the bottoms of the two first guide rails. The two third corner block guide blocks are respectively slidably arranged at the bottoms of the two second guide rails. One end of each of the two driving connecting rods is rotatably arranged at the bottom of the corner block collision block. And the other ends of the two driving connecting rods are respectively rotatably arranged at the bottoms of the first corner block guide block and the second corner block guide block. The two corner block fixing blocks are respectively installed on the tops of the first corner block guide block and the second corner block guide block. And the two corner block fixing blocks are respectively fixedly connected with the two third corner block guide blocks. The tops of the two corner block fixing blocks are respectively fixedly connected with the first backrest adjustment block and the second backrest adjustment block.

[0003] In this patent document, two driving connecting rods drive the first corner guiding block and the second corner guiding block to slide on two first guide rails respectively, synchronously driving the first backrest adjusting block and the second backrest adjusting block to move relatively, so that the two first fixture corners and the two second fixture corners cooperate to clamp and fix the four sides of the glass sheet. It realizes the four-sided positioning of the glass sheet by using the surrounding positioning method. When the specification of the glass sheet is relatively large (for example, the length of the glass sheet is relatively long, etc.), and only the width direction of the glass sheet needs to be positioned, the surrounding positioning method is not suitable, which will cause the large volume of the four-sided linkage positioning device and is not conducive to meeting the positioning requirements for target parts of different specifications.

[0004] Therefore, the defect is very obvious and a solution is urgently needed. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the present utility model is to provide a linkage four-point positioning mechanism.

[0006] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] A linkage four-point positioning mechanism includes a linkage base, two first connecting rods, two second connecting rods, a linkage slide plate longitudinally slidably connected to the top surface of the linkage base, two first sliders horizontally slidably connected to one end of the top surface of the linkage base and located on both sides of the linkage slide plate respectively, two first positioning members respectively installed at one ends of the two first sliders, two second sliders horizontally slidably connected to the other end of the top surface of the linkage base and located on both sides of the linkage slide plate respectively, two second positioning members respectively installed at one ends of the two second sliders, and a linkage driving mechanism installed on the linkage base and used to drive the linkage slide plate to reciprocate. One ends of the two first connecting rods are respectively hinged to the linkage slide plate, the other ends of the two first connecting rods are respectively hinged to the other ends of the two first sliders, one ends of the two second connecting rods are respectively hinged to the linkage slide plate, and the other ends of the two second connecting rods are respectively hinged to the other ends of the two second sliders. A positioning space is formed between the two first positioning members and the two second positioning members.

[0008] Further, the first positioning member or / and the second positioning member is a roller arranged to rotate.

[0009] Further, two first stroke grooves are provided at one end of the linkage base, the two first stroke grooves are respectively located on both sides of the linkage slide plate, the two first positioning members respectively penetrate the two first stroke grooves, and the first positioning members are movably arranged in the first stroke grooves.

[0010] Further, two second stroke grooves are provided at the other end of the linkage base, the two second stroke grooves are respectively located on both sides of the linkage slide plate, the two second positioning members respectively penetrate the two second stroke grooves, and the second positioning members are movably arranged in the second stroke grooves.

[0011] Further, the linkage driving mechanism includes a support frame installed on the linkage base, a lead screw rotatably connected to the support frame, a moving nut sleeved on the lead screw in a threaded manner, a rotation driver installed on the support frame or the linkage base and used to drive the lead screw to rotate, and a connecting plate connecting the moving nut and the linkage slide plate.

[0012] Further, the support frame is provided with a through hole, and the linkage slide plate passes through the through hole.

[0013] Further, the linkage slide plate is slidably connected to the linkage base via a longitudinal guide rail.

[0014] Further, both the first slider and the second slider are slidably connected to the linkage base via a transverse guide rail.

[0015] Further, at least one first slider or at least one second slider is provided with a trigger piece, the linkage base is provided with two limit switches, the two limit switches are arranged at intervals along the transverse sliding direction of the first slider or the second slider, the trigger piece is used to trigger one of the limit switches, and the limit switch is electrically connected to the linkage driving mechanism.

[0016] Advantages of the utility model: In practical applications, initially, the two first positioning members are in an open state (away from each other), and the two second positioning members are in an open state (away from each other). After the target member is located in the positioning space, the linkage driving mechanism drives the linkage slide plate to slide forward. The forward-sliding linkage slide plate drives the two first sliders to move closer to each other via the two first connecting rods, so that the two first positioning members are closer to each other. And the forward-sliding linkage slide plate drives the two second sliders to move closer to each other via the two second connecting rods, so that the two second positioning members are closer to each other, enabling the two first positioning members and the two second positioning members to abut against the target member in the positioning space to perform four-point deviation correction positioning on the target member. When it is necessary to release the target member, the linkage driving mechanism drives the linkage slide plate to slide backward and return to the initial state, so that the two first positioning members and the two second positioning members are all in an open state, facilitating four-point positioning of the next target member. The structural design of the utility model is ingenious. One linkage driving mechanism drives the two first positioning members and the two second positioning members to act synchronously, so as to be able to achieve four-point positioning, which is beneficial to improving the accuracy and stability of deviation correction positioning of the target member in the horizontal direction. And the four-point positioning belongs to open positioning, which can meet the positioning of target members of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Description of the reference numerals:

[0019] 1. Linkage base; 2. First connecting rod; 3. Second connecting rod; 4. Linkage slide plate; 5. First slider; 6. Second slider; 7. First positioning member; 8. Second positioning member; 9. Linkage driving mechanism; 10. First travel groove; 11. Second travel groove; 12. Support frame; 13. Lead screw; 14. Moving nut; 15. Rotating driver; 16. Connecting plate; 17. Through hole; 18. Longitudinal guide rail; 19. Transverse guide rail; 20. Trigger piece; 21. Limit switch. Detailed implementation manners

[0020] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation manners does not limit the present utility model.

[0021] As Figure 1 shown, a linkage type four-point positioning mechanism provided by the present utility model includes a linkage base 1, two first connecting rods 2, two second connecting rods 3, a linkage slide plate 4 longitudinally slidably connected to the top surface of the linkage base 1, two first sliders 5 laterally slidably connected to one end of the top surface of the linkage base 1 and located on both sides of the linkage slide plate 4 respectively, two first positioning members 7 respectively installed at one ends of the two first sliders 5, two second sliders 6 laterally slidably connected to the other end of the top surface of the linkage base 1 and located on both sides of the linkage slide plate 4 respectively, two second positioning members 8 respectively installed at one ends of the two second sliders 6, and a linkage driving mechanism 9 installed on the linkage base 1 and used to drive the linkage slide plate 4 to reciprocate. One ends of the two first connecting rods 2 are respectively hinged to the linkage slide plate 4, and the other ends of the two first connecting rods 2 are respectively hinged to the other ends of the two first sliders 5. One ends of the two second connecting rods 3 are respectively hinged to the linkage slide plate 4, and the other ends of the two second connecting rods 3 are respectively hinged to the other ends of the two second sliders 6. A positioning space is formed between the two first positioning members 7 and the two second positioning members 8.

[0022] In practical applications, at the beginning, the two first positioning members 7 are in an open state (away from each other), and the two second positioning members 8 are in an open state (away from each other). After the target member is located within the positioning space, the linkage driving mechanism 9 drives the linkage slide plate 4 to slide forward. The forward-sliding linkage slide plate 4 drives the two first sliders 5 to move closer to each other via the two first linkages 2, causing the two first positioning members 7 to move closer to each other. Moreover, the forward-sliding linkage slide plate 4 drives the two second sliders 6 to move closer to each other via the two second linkages 3, causing the two second positioning members 8 to move closer to each other, so that the two first positioning members 7 and the two second positioning members 8 abut against the target member within the positioning space to perform four-point deviation correction and positioning on the target member in the lateral direction. When it is necessary to release the target member, the linkage driving mechanism 9 drives the linkage slide plate 4 to slide backward and return to the initial state, so that the two first positioning members 7 and the two second positioning members 8 are both in an open state, facilitating four-point positioning of the next target member. The structural design of the present utility model is ingenious. One linkage driving mechanism 9 drives the two first positioning members 7 and the two second positioning members 8 (four positioning members) to act synchronously, so as to achieve four-point positioning, which is beneficial to improving the accuracy and stability of deviation correction and positioning of the target member in the lateral direction. Moreover, the four-point positioning belongs to open positioning and can meet the positioning requirements for target members of different specifications.

[0023] In this embodiment, the first positioning member 7 or / and the second positioning member 8 is a roller shaft arranged to rotate. When the first positioning member 7 or the second positioning member 8 abuts against the target member, when there is a relative displacement between the first positioning member 7 or the second positioning member 8 and the target member, the roller shaft can roll against the target member to reduce the frictional resistance and wear between the two.

[0024] In this embodiment, two first stroke grooves 10 are provided at one end of the linkage base 1. The two first stroke grooves 10 are respectively located on both sides of the linkage slide plate 4. The two first positioning members 7 respectively penetrate through the two first stroke grooves 10, and the first positioning member 7 is movably arranged within the first stroke groove 10. In practical applications, the first positioning member 7 reciprocates within the first stroke groove 10 to limit the moving stroke of the first positioning member 7.

[0025] In this embodiment, two second stroke grooves 11 are provided at the other end of the linkage base 1. The two second stroke grooves 11 are respectively located on both sides of the linkage slide plate 4. The two second positioning members 8 respectively penetrate through the two second stroke grooves 11, and the second positioning member 8 is movably arranged within the second stroke groove 11. In practical applications, the second positioning member 8 reciprocates within the second stroke groove 11 to limit the moving stroke of the second positioning member 8.

[0026] In this embodiment, the linkage driving mechanism 9 includes a support frame 12 installed on the linkage base 1, a lead screw 13 rotatably connected to the support frame 12, a moving nut 14 threadedly sleeved on the lead screw 13, a rotation driver 15 installed on the support frame 12 or the linkage base 1 and used to drive the lead screw 13 to rotate, and a connecting plate 16 connecting the moving nut 14 and the linkage slide plate 4. Specifically, the rotation driver 15 can be a motor. In practical applications, the rotation driver 15 drives the lead screw 13 to rotate, and the rotating lead screw 13 drives the moving nut 14, the connecting plate 16, and the linkage slide plate 4 to move along the axial direction of the lead screw 13 (longitudinal movement). By controlling the forward and reverse rotation of the lead screw 13, the forward or backward movement of the linkage slide plate 4 can be controlled.

[0027] In this embodiment, the support frame 12 is provided with a through hole 17, and the linkage slide plate 4 passes through the through hole 17. This structural design makes the structure of the linkage slide plate 4 and the support frame 12 compact and does not affect the reciprocating movement of the linkage slide plate 4.

[0028] In this embodiment, the linkage slide plate 4 is slidably connected to the linkage base 1 via a longitudinal guide rail 18. This structural design improves the stability of the longitudinal movement of the linkage slide plate 4.

[0029] In this embodiment, both the first slider 5 and the second slider 6 are slidably connected to the linkage base 1 via a transverse guide rail 19. This structural design improves the stability of the transverse movement of the first slider 5 and the second slider 6.

[0030] In this embodiment, at least one first slider 5 or at least one second slider 6 is provided with a trigger piece 20, and the linkage base 1 is provided with two limit switches 21. The two limit switches 21 are arranged at intervals along the transverse sliding direction of the first slider 5 or the second slider 6. The trigger piece 20 is used to trigger one of the limit switches 21, and the limit switch 21 is electrically connected to the linkage driving mechanism 9. In practical applications, when the trigger piece 20 triggers one of the limit switches 21, it proves that the linkage slide plate 4 slides forward to the extreme position, and the linkage driving mechanism 9 stops driving the linkage slide plate 4 to move forward; when the trigger piece 20 triggers the other limit switch 21, it proves that the linkage slide plate 4 slides backward to the extreme position, and the linkage driving mechanism 9 stops driving the linkage slide plate 4 to move backward.

[0031] Specifically, when the length of the first connecting rod 2 is equal to the length of the second connecting rod 3, the distance between the two first positioning members 7 is equal to the distance between the two second positioning members 8; when the length of the first connecting rod 2 is less than the length of the second connecting rod 3, the distance between the two first positioning members 7 is less than the distance between the two second positioning members 8; when the length of the first connecting rod 2 is greater than the length of the second connecting rod 3, the distance between the two first positioning members 7 is greater than the distance between the two second positioning members 8.

[0032] Specifically, the linkage driving mechanism (9) can also adopt a linear driving module such as a cylinder or a linear motor.

[0033] All the technical features in this embodiment can be freely combined according to actual needs.

[0034] The above embodiments are preferred implementation schemes of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A linkage four-point positioning mechanism, characterized in that: It includes a linkage base (1), two first link rods (2), two second link rods (3), a linkage slide plate (4) longitudinally slidably connected to the top surface of the linkage base (1), two first sliders (5) transversely slidably connected to one end of the top surface of the linkage base (1) and located on both sides of the linkage slide plate (4) respectively, two first positioning members (7) respectively installed at one ends of the two first sliders (5), two second sliders (6) transversely slidably connected to the other end of the top surface of the linkage base (1) and located on both sides of the linkage slide plate (4) respectively, two second positioning members (8) respectively installed at one ends of the two second sliders (6), and a linkage driving mechanism (9) installed on the linkage base (1) and used to drive the linkage slide plate (4) to reciprocate. One ends of the two first link rods (2) are respectively hinged to the linkage slide plate (4), the other ends of the two first link rods (2) are respectively hinged to the other ends of the two first sliders (5), one ends of the two second link rods (3) are respectively hinged to the linkage slide plate (4), and the other ends of the two second link rods (3) are respectively hinged to the other ends of the two second sliders (6). A positioning space is formed between the two first positioning members (7) and the two second positioning members (8).

2. The linkage four-point positioning mechanism according to claim 1, characterized in that: The first positioning member (7) or / and the second positioning member (8) is a roller arranged to rotate.

3. The linkage four-point positioning mechanism according to claim 1, characterized in that: Two first stroke grooves (10) are provided at one end of the linkage base (1). The two first stroke grooves (10) are respectively located on both sides of the linkage slide plate (4). The two first positioning members (7) respectively penetrate through the two first stroke grooves (10), and the first positioning member (7) is movably arranged in the first stroke groove (10).

4. A linkage four-point positioning mechanism according to claim 1, characterized in that: Two second stroke grooves (11) are provided at the other end of the linkage base (1). The two second stroke grooves (11) are respectively located on both sides of the linkage slide plate (4). The two second positioning members (8) respectively penetrate through the two second stroke grooves (11), and the second positioning member (8) is movably arranged in the second stroke groove (11).

5. A linkage type four-point positioning mechanism according to claim 1, characterized in that: The linkage driving mechanism (9) includes a support frame (12) installed on the linkage base (1), a lead screw (13) rotatably connected to the support frame (12), a moving nut sleeve (14) threadedly sleeved on the lead screw (13), a rotation driver (15) installed on the support frame (12) or the linkage base (1) and used to drive the lead screw (13) to rotate, and a connecting plate (16) connecting the moving nut sleeve (14) and the linkage slide plate (4).

6. The linkage four-point positioning mechanism according to claim 5, wherein: The support frame (12) is provided with a through hole (17), and the linkage slide plate (4) passes through the through hole (17).

7. A linkage type four-point positioning mechanism according to claim 1, characterized in that: The linkage slide plate (4) is slidably connected to the linkage base (1) via a longitudinal guide rail (18).

8. A linkage four-point positioning mechanism according to claim 1, characterized in that: Both the first slider (5) and the second slider (6) are slidably connected to the linkage base (1) via a transverse guide rail (19).

9. The linkage four-point positioning mechanism according to claim 1, wherein: At least one first slider (5) or at least one second slider (6) is installed with a trigger piece (20). Two limit switches (21) are installed on the linkage base (1). The two limit switches (21) are spaced along the transverse sliding direction of the first slider (5) or the second slider (6). The trigger piece (20) is used to trigger one of the limit switches (21), and the limit switch (21) is electrically connected to the linkage driving mechanism (9).

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