Positioning mechanism and welding apparatus

Abstract

The application provides a positioning mechanism and a welding device. The positioning mechanism comprises a base, a chuck rotatably installed on the base, a plurality of clamping claws arranged in a ring array, one end of each clamping claw being rotatably installed on the base, a rotary driving unit installed on the base and connected with the chuck, and a plurality of pushing units installed on the chuck and respectively connected with the plurality of clamping claws. When the rotary driving unit drives the chuck to rotate forward, the plurality of pushing units are driven by the chuck to respectively push the plurality of clamping claws to rotate, the plurality of clamping claws are close to each other, and the end of the plurality of clamping claws can clamp a welding piece. When the rotary driving unit drives the chuck to rotate reversely, the plurality of pushing units are driven by the chuck to respectively push the plurality of clamping claws to rotate reversely, the plurality of clamping claws are away from each other to release the clamping of the welding piece. Therefore, the application can realize automatic clamping operation of the welding piece, can replace manual operation, saves time and effort, and helps to improve the welding efficiency.

Description

Technical Field

[0001] This application belongs to the field of welding technology, and more specifically, relates to a positioning mechanism and welding equipment using the positioning mechanism. Background Technology

[0002] Before welding, the welding equipment needs to fix the position of the workpiece to be welded to prevent it from shifting during the welding process, which helps to improve the welding quality.

[0003] The workpieces to be welded are usually held and fixed by a clamping mechanism. However, the current clamping mechanism is relatively complex and often requires manual opening and closing, which is time-consuming and labor-intensive and seriously affects welding efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a positioning mechanism and welding equipment to solve the problem in the related art that the clamping mechanism used to clamp and fix the workpiece to be welded requires manual operation, which is time-consuming, labor-intensive, and has low welding efficiency.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] On the one hand, a positioning mechanism is provided, including:

[0007] Base;

[0008] A chuck is rotatably mounted on the base;

[0009] Multiple jaws are arranged in a ring array, with one end of each jaw rotatably mounted on the base;

[0010] A rotation drive unit is mounted on the base and connected to the chuck, used to drive the chuck to rotate forward and backward;

[0011] Multiple pushing units are installed on the chuck and connected to multiple jaws respectively, and are used to push the other ends of the multiple jaws closer to each other or further away from each other when the chuck rotates.

[0012] In this structure, when the rotary drive unit drives the chuck to rotate forward, multiple pushing units, driven by the chuck, push multiple jaws to rotate, bringing the jaws closer together. The ends of the jaws form a clamping area for holding the workpiece to be welded. When the rotary drive unit drives the chuck to rotate in the reverse direction, the multiple pushing units, driven by the chuck, push the multiple jaws to rotate in the opposite direction, moving the jaws away from each other to release the workpiece from clamping. Therefore, this application, by driving the rotation of the chuck and multiple jaws through the rotary drive unit, and with the action of multiple pushing units, can achieve automated clamping of the workpiece to be welded, replacing manual operation, saving time and labor, and helping to improve welding efficiency.

[0013] In one embodiment, each of the jaws is provided with a first arc-shaped groove, and each of the pushing units includes a first locking member that passes through the corresponding first arc-shaped groove and is installed on the chuck. Each first locking member is used to cooperate with the corresponding first arc-shaped groove to guide the corresponding jaw to rotate.

[0014] In this structure, each first locking element cooperates with the corresponding first arc groove to limit the rotation trajectory of the corresponding claw, and can also limit the rotation angle of each claw.

[0015] In one embodiment, the chuck has a plurality of second arc-shaped grooves arranged in an annular array; the base is equipped with a plurality of second locking members, each of the second locking members passing through the corresponding second arc-shaped groove, and one end of each claw is sleeved on the corresponding second locking member.

[0016] In this structure, each second locking element can cooperate with the corresponding second arc-shaped groove, which not only guides the rotation of the chuck but also limits the rotation angle of the chuck.

[0017] In one embodiment, the rotation drive unit includes a base mounted on the base, a slider slidably mounted on the base, and a power output module for driving the slider to slide. The power output module is mounted on the base and connected to the slider, and the chuck is hinged to the slider.

[0018] This structure uses a power output module to drive a slider to slide back and forth on the base, thereby driving the chuck to rotate in both directions.

[0019] In one embodiment, the rotation drive unit further includes a first sensing plate mounted on the slider, and a first sensor is correspondingly mounted on the base for cooperating with the first sensing plate to limit the movement stroke of the slider.

[0020] In this structure, when the first sensing plate cooperates with the first sensor to sense, it indicates that the slider has moved into position and the chuck has rotated into position.

[0021] In one embodiment, a second sensing plate is mounted on the chuck, and a second sensor is correspondingly mounted on the base to cooperate with the second sensing plate to limit the rotation angle of the chuck.

[0022] In this structure, when the second sensing plate engages with the second sensor, it indicates that the chuck has rotated into position, and the multiple jaws clamp and fix the workpiece to be welded.

[0023] In one embodiment, the positioning mechanism further includes a lateral movement drive unit for driving the base to move laterally, a longitudinal movement drive unit for driving the base to move longitudinally, and a lifting drive unit for driving the base to lift. The base is mounted on the lateral movement drive unit, the lateral movement drive unit is mounted on the longitudinal movement drive unit, and the longitudinal movement drive unit is mounted on the lifting drive unit.

[0024] This structure allows for multi-directional adjustment of multiple jaws in the XYZ directions via a transverse drive unit, a longitudinal drive unit, and a lifting drive unit.

[0025] In one embodiment, the positioning mechanism further includes a spot welding base for supporting the workpiece to be welded, a mounting base for supporting the spot welding base, and a third locking member mounted on the mounting base to lock the spot welding base onto the mounting base.

[0026] This structure allows for the support and positioning of the workpiece to be welded via the spot welding base, the support and positioning of the spot welding base via the mounting base, and the locking mechanism via the third locking element to lock the spot welding base onto the mounting base.

[0027] In one embodiment, the spot welding base has a through hole for the workpiece to be welded to extend into, the mounting base is equipped with an air nozzle, and the mounting base has an air passage connecting the air nozzle and the through hole.

[0028] With this structure, the air nozzle can be connected to an external air supply device, thereby enabling the adsorption and fixation of the workpiece to be welded, as well as the blowing out of the workpiece, through the air passage and through hole.

[0029] On the other hand, a welding device is provided, including the positioning mechanism provided in any of the above embodiments.

[0030] With this structure, welding equipment using this positioning mechanism can automatically clamp and fix the workpiece to be welded through multiple jaws, ensuring stable clamping and fixation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the positioning mechanism provided in the embodiments of this application;

[0033] Figure 2 for Figure 1 A schematic diagram of the decomposition process;

[0034] Figure 3 A schematic diagram showing the connection between the base, chuck, multiple jaws, rotation drive unit, and multiple pushing units provided in an embodiment of this application;

[0035] Figure 4 for Figure 3 A schematic diagram of the decomposition process;

[0036] Figure 5 This is a schematic diagram of the structure of the chuck provided in an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the chuck structure provided in an embodiment of this application;

[0038] Figure 7 This is a schematic diagram showing the connection between the lifting drive unit, the longitudinal drive unit, and the transverse drive unit provided in an embodiment of this application.

[0039] Figure 8 This is a schematic diagram of the connection between the support unit and the workpiece to be welded, provided in an embodiment of this application.

[0040] Figure 9 for Figure 8 A schematic diagram of the decomposition process;

[0041] Figure 10 This is a schematic diagram of the mounting base provided in an embodiment of this application.

[0042] The main markings in the attached figures are as follows:

[0043] 1. Base; 11. Second locking element; 12. Second bushing; 13. First sensor; 14. Second sensor; 15. Second mounting hole;

[0044] 2. Chuck; 21. First mounting hole; 22. Second arc groove; 23. Shaft hole; 24. Second sensing plate;

[0045] 3. Claw; 31. First arc-shaped groove; 32. Clearance groove;

[0046] 4. Rotation drive unit; 41. Base; 42. Slider; 421. Positioning guide rod; 43. Power output module; 44. First sensing plate;

[0047] 5. Pushing unit; 51. First locking element;

[0048] 6. Lifting drive unit; 61. Lifting seat; 62. Lifting sliding seat; 63. Fine-tuning knob;

[0049] 7. Support unit; 71. Spot welding seat; 710. Through hole; 72. Mounting seat; 721. Mounting base plate; 722. Mounting boss; 7221. Mounting groove; 723. Air nozzle; 724. Air passage; 7241. First air passage; 7242. Second air passage; 73. Third locking element; 74. Positioning seat;

[0050] 8. Horizontal movement drive unit; 9. Vertical movement drive unit; 10. Workpiece to be welded. Detailed Implementation

[0051] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0052] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0053] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0054] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] Throughout this specification, references to "an embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0057] For ease of description, we define three mutually perpendicular coordinate axes in space as the X-axis, Y-axis, and Z-axis. The direction along the X-axis is vertical, the direction along the Y-axis is horizontal, and the direction along the Z-axis is vertical. The X-axis and Y-axis are two mutually perpendicular coordinate axes on the same horizontal plane, and the Z-axis is the vertical coordinate axis. The X-axis, Y-axis, and Z-axis lie on three mutually perpendicular planes in space: the XY-plane, the YZ-plane, and the XZ-plane. The XY-plane is horizontal, and the XZ-plane and YZ-plane are both vertical, with the XZ-plane perpendicular to the YZ-plane. Movement along these three axes in space refers to movement along the three mutually perpendicular axes in space, specifically movement along the X, Y, and Z axes. Planar movement, on the other hand, refers to movement within the XY-plane.

[0058] Please see Figure 3 and Figure 4The positioning mechanism provided in this application embodiment will now be described. The positioning mechanism includes a base 1, a chuck 2, multiple jaws 3, a rotation drive unit 4, and multiple pushing units 5. The base 1 can be approximately cubic in shape, with a cylindrical sleeve protruding upwards from the top. The chuck 2 can be fitted onto this sleeve, allowing the chuck 2 to rotate on the base 1. Multiple jaws 3 are arranged in a ring array above the chuck 2. One end of each jaw 3 is rotatably mounted on the base 1, and the jaws 3 can rotate towards the center of the chuck 2. The other end of each jaw 3 can engage with the workpiece 10 to be welded, thereby clamping and fixing the workpiece 10. The number of jaws 3 can be three, and each jaw 3 can be approximately arc-shaped. That is, in the initial position, the end of each jaw 3 furthest from its rotating end extends towards the center of the chuck 2, thereby reducing the rotational stroke of each jaw 3. A rotation drive unit 4 is mounted on the base 1 and connected to the chuck 2. Under the driving action of the rotation drive unit 4, the chuck 2 can rotate forward and backward on the base 1. Multiple pushing units 5 can be mounted on the chuck 2, and each pushing unit 5 can be connected to a corresponding jaw 3. The multiple pushing units 5 are used to push the other ends of the multiple jaws 3 closer to or further away from each other when the chuck 2 rotates. The number of pushing units 5 is the same as the number of jaws 3; when there are three jaws 3, the number of pushing units 5 can also be three. Of course, in other embodiments, the number of jaws 3 and the number of pushing units 5 can be adjusted according to actual needs, and are not limited here.

[0059] In this structure, when the rotary drive unit 4 drives the chuck 2 to rotate in the forward direction, multiple pushing units 5, driven by the chuck 2, push multiple jaws 3 to rotate, causing the jaws 3 to move closer together. The ends of the jaws 3 form a clamping area for holding the workpiece 10 to be welded, thus clamping and fixing the workpiece 10. When the rotary drive unit 4 drives the chuck 2 to rotate in the reverse direction, the multiple pushing units 5, driven by the chuck 2, push the multiple jaws 3 to rotate in the reverse direction, causing the jaws 3 to move away from each other to release the clamping of the workpiece 10. Therefore, this application, by driving the rotation of the chuck 2 and multiple jaws 3 through the rotary drive unit 4, and with the action of multiple pushing units 5, can achieve automated clamping of the workpiece 10 to be welded, replacing manual operation, saving time and effort, and helping to improve welding efficiency.

[0060] In one embodiment, see Figure 3 , Figure 5 and Figure 6As a specific embodiment of the positioning mechanism provided in this application, each claw 3 has a first arc-shaped groove 31, and each pushing unit 5 includes a first locking member 51 that passes through the corresponding first arc-shaped groove 31 and is installed on the chuck 2. Each first locking member 51 is used to cooperate with the corresponding first arc-shaped groove 31 to guide the corresponding claw 3 to rotate. Specifically, each first locking member 51 can be a screw, and the chuck 2 has a first mounting hole 21 that is threadedly connected to each first locking member 51. Each claw 3 can be clamped and limited by the cooperation of the chuck 2 and the end of the corresponding first locking member 51, thereby preventing the first locking member 51 from disengaging from the corresponding claw 3. In this structure, when the chuck 2 is driven to rotate forward by the rotation drive unit 4, it is stopped and limited by the cooperation of each first locking member 51 and the corresponding first arc-shaped groove 31. Each claw 3 rotates along the trajectory of its first arc-shaped groove 31 and toward the center of the chuck 2, thereby driving multiple claws 3 to rotate synchronously and move closer to each other to achieve clamping and fixing of the workpiece 10 to be welded. Conversely, each claw 3 can rotate in the opposite direction to its initial position under the stopping and limiting action of the corresponding first locking member 51, thereby releasing the clamping of the workpiece 10 to be welded. Each first locking member 51 and the corresponding first arc-shaped groove 31 can not only limit the rotation trajectory of each claw 3, but each first locking member 51 can also cooperate with the two ends of the corresponding first arc-shaped groove 31 to stop and limit the rotation angle of each claw 3. For example, when each first locking member 51 abuts against one end of the corresponding first arc groove 31, it indicates that each claw 3 has rotated to its initial position; when each first locking member 51 abuts against the other end of the corresponding first arc groove 31, it indicates that each claw 3 has rotated to the position of maximum rotation angle, that is, the position where each claw 3 abuts against the workpiece 10 to be welded.

[0061] In some embodiments, each pushing unit 5 may also be a cam mounted on the base 1, and each cam can push the corresponding jaw 3 toward the center of the chuck 2, thereby enabling the multiple jaws 3 to approach each other. In other embodiments, each pushing unit 5 may also be a push rod mounted on the chuck 2, and each jaw 3 has a guide groove for the push rod to extend into, and each push rod can slide along the corresponding guide groove to push the corresponding jaw 3 toward the center of the chuck 2. Of course, in other embodiments, the structure of each pushing unit 5 can also be adjusted according to actual needs, and is not limited here.

[0062] In some embodiments, a first bushing (not shown) may be fitted onto each first locking member 51, and the outer peripheral surface of each first bushing may abut against the inner sidewall of the corresponding first arcuate groove 31. The first bushing can convert the sliding friction between each first locking member 51 and the corresponding first arcuate groove 31 into rolling friction, thereby reducing the frictional wear between each first locking member 51 and the inner sidewall of the corresponding first arcuate groove 31, so as to protect each first locking member 51 and each claw 3.

[0063] In one embodiment, see Figure 3 , Figure 4 and Figure 6 As a specific embodiment of the positioning mechanism provided in this application, the chuck 2 has a plurality of second arc-shaped grooves 22 arranged in a ring array; a plurality of second locking members 11 are installed on the base 1, each second locking member 11 passing through the corresponding second arc-shaped groove 22, and one end of each claw 3 is sleeved on the corresponding second locking member 11. Specifically, each second locking member 11 can be a screw, and the base 1 has a corresponding second mounting hole 15 that is threadedly connected to the corresponding second locking member 11. Each claw 3 can be clamped by the end of the chuck 2 and the corresponding second locking member 11, so that each claw 3 rotates about the corresponding second locking member 11 as a pivot. In this structure, each second locking member 11 can cooperate with the corresponding second arc-shaped groove 22, which on the one hand can guide the rotation of the chuck 2; on the other hand, can limit the rotation angle of the chuck 2. For example, when each of the second locking members 11 engages with one end of the corresponding second arc groove 22 to block, each claw 3 moves to the initial position; when each of the second locking members 11 engages with the other end of the corresponding second arc groove 22 to block, each claw 3 moves to the position where it abuts against the workpiece 10 to be welded.

[0064] In one embodiment, see Figure 4 Each second locking member 11 may be fitted with a second bushing 12, the outer circumferential surface of each second bushing 12 abutting against the inner sidewall of the corresponding second arc-shaped groove 22. The second bushing 12 transforms the sliding friction between each second locking member 11 and the corresponding second arc-shaped groove 22 into rolling friction, thereby reducing frictional wear between each second locking member 11 and the inner sidewall of the corresponding second arc-shaped groove 22, thus protecting each second locking member 11 and the chuck 2.

[0065] In one embodiment, see Figure 4 As a specific embodiment of the positioning mechanism provided in this application, the rotation drive unit 4 includes a base 41 mounted on the base 1, a slider 42 slidably mounted on the base 41, and a power output module 43 for driving the slider 42 to slide. The power output module 43 is mounted on the base 41 and connected to the slider 42, and the chuck 2 is hinged to the slider 42. Specifically, please refer to... Figure 4 and Figure 6 The base 41 and the slider 42 are connected via a guide rail pair, thereby improving the reliability of the reciprocating movement of the slider 42. A positioning guide rod 421 is mounted on the slider 42, and a shaft hole 23 is provided on the chuck 2 near the slider 42 for the positioning guide rod 421 to extend into, allowing the chuck 2 to rotate around the positioning guide rod 421. In this structure, the slider 42 is driven to reciprocate on the base 41 by the power output module 43, thereby driving the forward and reverse rotation of the chuck 2. The power output module 43 can be a cylinder, electric cylinder, hydraulic cylinder, etc., and is not limited to any particular type.

[0066] In some embodiments, the rotation drive unit 4 may also be a screw drive mechanism, a linear motor, or the like mounted on the base 1. In other embodiments, a driven wheel is mounted on the chuck 2, and the rotation drive unit 4 may include a motor mounted on the base 1, a drive wheel mounted on the output shaft of the motor, and a belt connecting the drive wheel and the driven wheel. The drive wheel, belt, and driven wheel can drive the chuck 2 to rotate together. Alternatively, the outer circumferential surface of the chuck 2 may be provided with teeth, and the rotation drive unit 4 may be a motor and a gear mounted on the output shaft of the motor. The gear meshes with the outer circumferential surface of the chuck 2, and the rotation of the gear can drive the rotation of the chuck 2 together. Of course, in other embodiments, the structure of the rotation drive unit 4 can also be adjusted according to actual needs, and is not limited here.

[0067] In one embodiment, see Figure 3 and Figure 4 As a specific embodiment of the positioning mechanism provided in this application, the rotation drive unit 4 further includes a first sensing plate 44 mounted on the slider 42, and a first sensor 13 correspondingly mounted on the base 1 for cooperating with the first sensing plate 44 to limit the movement stroke of the slider 42. Specifically, the first sensor 13 has a groove for the first sensing plate 44 to extend into, thereby facilitating its cooperation with the first sensing plate 44. In this structure, when the first sensing plate 44 cooperates with the first sensor 13 to sense, it indicates that the slider 42 has moved into position and the chuck 2 has rotated into position.

[0068] In some embodiments, the number of first sensors 13 and the number of first sensing plates 44 can both be two. Two first sensors 13 are spaced apart on the base 1, and two first sensing plates 44 are spaced apart on the slider 42. Each of the two first sensors 13 can cooperate with one of the two first sensing plates 44. Specifically, when one sensing plate cooperates with the corresponding first sensor 13, it indicates that the chuck 2 has rotated to the correct position, and the multiple jaws 3 rotate to the position where they clamp and fix the workpiece 10 to be welded. When the other sensing plate cooperates with the corresponding first sensor 13, it indicates that the chuck 2 has rotated to its initial position, and the multiple jaws 3 have rotated to their initial position, achieving a reset. Therefore, by cooperating with the two first sensors 13 and the two first sensing plates 44, the two positions of the slider 42 can be limited, thereby improving the rotational reliability of the chuck 2.

[0069] In one embodiment, see Figure 3 and Figure 4As a specific embodiment of the positioning mechanism provided in this application, a second sensing plate 24 is mounted on the chuck 2, and a second sensor 14 is correspondingly mounted on the base 1 to cooperate with the second sensing plate 24 to limit the rotation angle of the chuck 2. Specifically, the second sensor 14 has a groove for the second sensing plate 24 to extend into, thereby facilitating cooperation with the second sensing plate 24. With this structure, when the second sensing plate 24 cooperates with the second sensor 14, it indicates that the chuck 2 has rotated to the correct position, and the multiple jaws 3 clamp and fix the workpiece 10 to be welded.

[0070] In some embodiments, the number of second sensing plates 24 and the number of second sensors 14 can both be two. Two second sensing plates 24 are spaced apart on the chuck 2, and two second sensors 14 are spaced apart on the base 1. Specifically, when one second sensing plate 24 engages with its corresponding second sensor 14, it indicates that the chuck 2 has rotated to its correct position, and the multiple jaws 3 clamp and fix the workpiece 10 to be welded. When another second sensing plate 24 engages with its corresponding second sensor 14, it indicates that the chuck 2 has rotated to its initial position, and the multiple jaws 3 have also rotated to their initial positions, releasing the clamping and fixing of the workpiece 10 to be welded. Therefore, through the engagement of the two second sensing plates 24 and the two second sensors 14, the rotation angle of the chuck 2 can be precisely controlled.

[0071] In one embodiment, see Figure 1 and Figure 7 As a specific embodiment of the positioning mechanism provided in this application, the positioning mechanism further includes a transverse drive unit 8 for driving the base 1 to move laterally, a longitudinal drive unit 9 for driving the base 1 to move longitudinally, and a lifting drive unit 6 for driving the base 1 to rise and fall. The base 1 is mounted on the transverse drive unit 8, the transverse drive unit 8 is mounted on the longitudinal drive unit 9, and the longitudinal drive unit 9 is mounted on the lifting drive unit 6. In this structure, the transverse drive unit 8 can drive the base 1 and multiple claws 3 to move along the X-axis direction, the longitudinal drive unit 9 can drive the transverse drive unit 8, the base 1, and multiple claws 3 to move along the Y-axis direction, and the lifting drive unit 6 can drive the longitudinal drive unit 9, the transverse drive unit 8, the base 1, and multiple claws 3 to move along the Z-axis direction, thereby realizing multi-directional adjustment of the position of multiple claws 3 in the XYZ directions.

[0072] In one embodiment, see Figure 7The lifting drive unit 6 may include a lifting base 61, a lifting slide seat 62 slidably mounted on the lifting base 61 along the Z-axis, and a fine-tuning knob 63 for adjusting the height of the lifting slide seat 62. The fine-tuning knob 63 is mounted on the lifting base 61 and abuts against the lifting slide seat 62. With this structure, the amount of sliding of the lifting slide seat 62 on the lifting base 61 can be precisely controlled by the fine-tuning knob 63. Of course, in other embodiments, the lifting drive unit 6 may also be a lead screw drive mechanism, a linear motor, a cylinder drive mechanism, etc., and is not limited to any particular type.

[0073] In one embodiment, see Figure 7 The longitudinal drive unit 9 may include a longitudinal base mounted on the lifting sliding seat 62, a longitudinal lead screw mounted on the longitudinal base, a longitudinal sliding seat mounted on the longitudinal lead screw, and a longitudinal drive motor for driving the longitudinal lead screw to rotate. The longitudinal drive motor is mounted on the longitudinal base and connected to the longitudinal lead screw. The transverse drive unit 8 is mounted on the longitudinal sliding seat. In other words, the longitudinal drive unit 9 is a lead screw transmission mechanism commonly used in the market. This structure achieves the movement of the transverse drive unit 8, the base 1, and multiple jaws 3 along the Y-axis direction through the lead screw transmission mechanism, with high precision and good stability. Of course, in other embodiments, the longitudinal drive unit 9 may also be a linear motor on a slide table, a cylinder transmission mechanism, etc., and is not limited here.

[0074] In one embodiment, see Figure 7 The transverse drive unit 8 may include a transverse base mounted on a longitudinal sliding base, a transverse lead screw mounted on the transverse base, a transverse sliding base mounted on the transverse lead screw, and a transverse drive motor for driving the transverse lead screw to rotate. The transverse drive motor is mounted on the transverse base and connected to the transverse lead screw. The base 1 is mounted on the transverse sliding base. In other words, the transverse drive unit 8 is a commonly used lead screw transmission mechanism. This structure achieves high precision and good stability by moving the base 1 and multiple jaws 3 along the X-axis through the lead screw transmission mechanism. Of course, in other embodiments, the transverse drive unit 8 may also be a linear motor on a slide table, a cylinder transmission mechanism, etc., and is not limited to this specific embodiment.

[0075] In one embodiment, see Figure 8 and Figure 9As a specific embodiment of the positioning mechanism provided in this application, the positioning mechanism further includes a spot welding seat 71 for supporting the workpiece 10 to be welded, a mounting seat 72 for supporting the spot welding seat 71, and a third locking member 73 mounted on the mounting seat 72 to lock the spot welding seat 71 onto the mounting seat 72. Specifically, the third locking member 73 may be a locking nut. The mounting seat 72 may include a mounting base plate 721 and a mounting boss 722 mounted on the mounting base plate 721. The mounting boss 722 may be generally cylindrical in shape. The mounting boss 722 has a mounting groove 7221 for accommodating the spot welding seat 71, which can realize the quick positioning and installation of the spot welding seat 71. The outer peripheral surface of the mounting boss 722 is provided with an external thread that is threaded to engage with the locking nut. This structure allows for the support and positioning of the workpiece 10 to be welded via the spot welding base 71, the support and positioning of the spot welding base 71 via the mounting base 72, and the locking element 73 to lock the spot welding base 71 onto the mounting base 72.

[0076] In one embodiment, see Figure 8 and Figure 9 The positioning mechanism may also include a positioning seat 74 that supports the mounting base 72. The mounting base 72 and the positioning seat 74 can be detachably connected by fasteners such as screws. The positioning seat 74 can be used to connect and fix with external support members; moreover, the positioning seat 74 can increase the height of the workpiece 10 to be welded in the Z-axis direction to accommodate the height of multiple jaws 3.

[0077] In one embodiment, see Figure 1 and Figure 2 The positioning seat 74, mounting seat 72, spot welding seat 71, and third locking member 73 can be combined to form a support unit 7 for supporting the workpiece 10 to be welded. The lifting drive unit 6, longitudinal drive unit 9, transverse drive unit 8, and base 1 are each provided with openings for the support unit 7 to extend into. In this structure, the support unit 7 can extend into the interior of the base 1, thus facilitating the insertion of the workpiece 10 into the clamping area enclosed by multiple jaws 3. This facilitates the clamping and fixing of the workpiece 10 by the multiple jaws 3, and helps reduce the overall size of the positioning mechanism.

[0078] In one embodiment, see Figure 9 and Figure 10As a specific embodiment of the positioning mechanism provided in this application, the spot welding base 71 has a through hole 710 for the workpiece 10 to be welded to extend into, and the mounting base 72 has an air nozzle 723 installed on it. The mounting base 72 also has an air passage 724 connecting the air nozzle 723 and the through hole 710. Specifically, the air nozzle 723 can be installed on the mounting base plate 721. The air passage 724 may include a first air passage 7241 opened on the mounting base plate 721 and a second air passage 7242 opened on the mounting boss 722. The first air passage 7241 connects the air nozzle 723 and the second air passage 7242, and the second air passage 7242 connects the first air passage 7241 and the through hole 710. The first air passage 7241 is arranged in a horizontal direction, and the second air passage 7242 is arranged in a vertical direction. The first air passage 7241 is perpendicular to the second air passage 7242, thereby changing the airflow direction and reducing the space occupied in the vertical direction. In this structure, the air nozzle 723 can be connected to an external air supply and extraction device, allowing air to be supplied or extracted into the through hole 710 via the air passage 724. When the workpiece 10 is mounted on the spot welding base 71, the external air supply and extraction device extracts air to achieve adsorption and fixation of the workpiece 10, improving the connection strength between the workpiece 10 and the spot welding base 71 and preventing positional displacement during welding. After the workpiece 10 is spot welded, the external air supply and extraction device supplies air to blow the workpiece 10 out of the through hole 710, facilitating material removal by the operator.

[0079] In one embodiment, see Figure 5 and Figure 8 The spot welding base 71 is roughly cylindrical in shape. Each claw 3 has a relief groove 32 at one end near the spot welding base 71. The spot welding base 71 can extend into the relief groove 32 so that each claw 3 can rotate to the top of the spot welding base 71 and abut against the workpiece 10 to be welded.

[0080] This application also provides a welding device, including the positioning mechanism provided in any of the above embodiments. With this structure, the welding device using this positioning mechanism can automatically clamp and fix the workpiece 10 to be welded through multiple jaws 3, ensuring stable clamping and fixation.

[0081] The specific steps for the welding equipment to clamp the workpiece 10 to be welded are as follows:

[0082] 1. Insert the workpiece 10 to be welded into the through hole 710, and the air supply device works to draw air to generate negative pressure through the air passage 724 and the through hole 710, so as to adsorb and fix the workpiece 10 to be welded onto the spot welding seat 71.

[0083] 2. The rotation drive unit 4 drives the chuck 2 to rotate, and multiple jaws 3 rotate and move closer to each other under the pushing action of multiple pushing units 5. The multiple jaws 3 achieve clamping and fixing of the workpiece 10 to be welded.

[0084] 3. The spot welding mechanism of the welding equipment performs spot welding operations on the workpiece 10 to be welded.

[0085] 4. After spot welding is completed, the rotating drive unit 4 continues to drive the chuck 2 to rotate in the opposite direction. Multiple jaws 3 rotate in the opposite direction and move away from each other under the pushing action of multiple pushing units 5. Multiple jaws 3 release the clamping and fixing of the workpiece 10 to be welded.

[0086] 5. The air supply device supplies air and blows the welded workpiece 10 out of the through hole 710 through the air passage 724 and the through hole 710, so that the operator can pick it up.

[0087] The welding equipment can repeat steps 1-5 above to achieve repetitive welding operations and mass production.

[0088] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A positioning mechanism, applied in welding equipment, characterized in that, include: Base; A chuck is rotatably mounted on the base; Multiple jaws are arranged in a ring array, with one end of each jaw rotatably mounted on the base; A rotation drive unit is mounted on the base and connected to the chuck, used to drive the chuck to rotate forward and backward; Multiple pushing units are installed on the chuck and connected to multiple jaws respectively, and are used to push the other ends of the multiple jaws closer to each other or further away from each other when the chuck rotates; The rotation drive unit includes a base mounted on the base and a slider slidably mounted on the base; The rotation drive unit further includes a first sensing plate mounted on the slider, and a first sensor is correspondingly mounted on the base for cooperating with the first sensing plate to limit the movement stroke of the slider; wherein, the first sensor has a groove for the first sensing plate to extend into; when the first sensing plate cooperates with the first sensor to sense, it indicates that the slider has moved into position and the chuck has rotated into position; A second sensing plate is installed on the chuck, and a second sensor is correspondingly installed on the base to cooperate with the second sensing plate to limit the rotation angle of the chuck; wherein, the second sensor has a groove for the second sensing plate to extend into; when the second sensing plate cooperates with the second sensor, it indicates that the chuck has rotated to the correct position, and the multiple jaws clamp and fix the workpiece to be welded; The positioning mechanism further includes a spot welding base for supporting the workpiece to be welded, a mounting base for supporting the spot welding base, and a third locking member mounted on the mounting base to lock the spot welding base onto the mounting base; wherein, the third locking member is a locking nut, the mounting base includes a mounting base plate and a mounting boss mounted on the mounting base plate, the mounting boss is cylindrical in shape, and the mounting boss has a mounting groove for accommodating the spot welding base; the outer circumferential surface of the mounting boss is provided with an external thread that is threadedly connected to the locking nut; The spot welding base has a through hole for the workpiece to be welded to extend into, and the mounting base is equipped with an air nozzle. The mounting base has an air passage connecting the air nozzle and the through hole. The air nozzle is connected to an external air supply device, and the air passage and the through hole are used to adsorb and fix the workpiece to be welded, and to blow the workpiece out. The air nozzle is mounted on the mounting base plate. The air passage includes a first air passage opened on the mounting base plate and a second air passage opened on the mounting boss. The first air passage connects the air nozzle and the second air passage. The second air passage connects the first air passage and the through hole. The first air passage is arranged in a horizontal direction, and the second air passage is arranged in a vertical direction. The spot welding base is cylindrical in shape, and each of the claws has a clearance groove at one end near the spot welding base. The spot welding base extends into each of the clearance grooves so that each of the claws can rotate to the top of the spot welding base and abut against the workpiece to be welded.

2. The positioning mechanism as described in claim 1, characterized in that: Each of the jaws is provided with a first arc-shaped groove, and each of the pushing units includes a first locking member that passes through the corresponding first arc-shaped groove and is installed on the chuck. Each first locking member is used to cooperate with the corresponding first arc-shaped groove to guide the corresponding jaw to rotate.

3. The positioning mechanism as described in claim 1, characterized in that: The chuck has a ring array of multiple second arc-shaped grooves; the base is equipped with multiple second locking components, each of which passes through the corresponding second arc-shaped groove, and one end of each claw is sleeved on the corresponding second locking component.

4. The positioning mechanism as described in claim 1, characterized in that: The rotation drive unit further includes a power output module for driving the slider to slide. The power output module is mounted on the base and connected to the slider. The chuck is hinged to the slider.

5. The positioning mechanism as described in any one of claims 1-4, characterized in that: The positioning mechanism further includes a lateral movement drive unit for driving the base to move laterally, a longitudinal movement drive unit for driving the base to move longitudinally, and a lifting drive unit for driving the base to lift. The base is mounted on the lateral movement drive unit, the lateral movement drive unit is mounted on the longitudinal movement drive unit, and the longitudinal movement drive unit is mounted on the lifting drive unit.

6. Welding equipment, characterized in that: Includes the positioning mechanism as described in any one of claims 1-5.

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