Triaxial positioner with adjustable axle distance

Abstract

The utility model relates to the technical field of position changing machines, and discloses a three-shaft position changing machine with an adjustable shaft distance, which comprises a base and is characterized in that the upper side of the base is fixedly connected with a second gear, the upper side of the second gear is rotatably connected with a bearing beam, the inner side of the bearing beam is slidably connected with a balancing weight, and the upper side of the balancing weight is fixedly connected with a plurality of chains. The other ends of the chains are jointly and fixedly connected with a pull hoop, the lower side of the pull hoop is fixedly connected with a mounting plate, and the side, close to the mounting plate, of the bearing beam is fixedly connected with two first sliding rails. The chain wheel rotates to drive the chain to lift the mounting plate, so that the height of the rotating arm is increased, a rotating space is vacated for rotation of the rotating arm, and collision with the ground is avoided.

Description

Technical Field

[0001] This utility model relates to the field of positioner technology, and in particular to a three-axis positioner with adjustable shaft pitch. Background Technology

[0002] Welding positioners generally consist of a worktable rotation mechanism and a tilting mechanism. By lifting, tilting, and rotating the worktable, the workpiece fixed on the worktable can be adjusted to the required welding and assembly angle. The worktable rotation is frequency-controlled and steplessly adjustable, which can achieve a satisfactory welding speed. The positioner generally fixes the workpiece from both ends using two chuck jaws. Depending on the length of different welding workpieces, the two chuck jaws can be adapted by adjusting the wheelbase. However, when the wheelbase is increased, the workpiece may rotate in the vertical plane, which may cause side collision problems due to the excessive wheelbase.

[0003] For example, Chinese utility model patent CN218225349U discloses a three-axis hollow C-type positioner, including a base. A main body housing assembly is fixedly connected to the upper end of the base. A rocker arm housing assembly is connected to one side of the upper end of the main body housing assembly. The two ends of the rocker arm housing assembly away from the main body housing assembly are respectively connected to a head frame housing assembly and a tail frame housing assembly through a centering adjustment assembly and a slide assembly. The slide assembly includes a plate and a slider. Although this utility model can achieve the effect of reaching the internal weld seam of the workpiece, when the axial distance between the head frame gripper and the tail frame gripper increases, that is, the length specification of the workpiece increases, the rocker arm housing assembly rotates. Because the height of the supporting shell is fixed, it cannot provide sufficient rotation space, which may lead to the workpiece side collision problem. Based on this, a three-axis positioner with adjustable axial distance is proposed. Utility Model Content

[0004] To address the technical problem of adjustable wheelbase in positioners, this utility model provides a three-axis positioner with adjustable wheelbase.

[0005] This utility model is achieved using the following technical solution: a three-axis positioner with adjustable wheelbase, comprising a base, a second gear fixedly connected to the upper side of the base, a load-bearing beam rotatably connected to the upper side of the second gear, a counterweight slidably connected to the inner side of the load-bearing beam, multiple chains fixedly connected to the upper side of the counterweight, a tie rod fixedly connected to the other end of the multiple chains, a mounting plate fixedly connected to the lower side of the tie rod, and two first-order slide rails fixedly connected to the side of the load-bearing beam near the mounting plate. The plates are slidably connected. A sixth gear is rotatably connected to the side of the mounting plate away from the load-bearing beam. A rotating arm is fixedly connected to the side of the sixth gear away from the mounting plate. A baffle plate is fixedly connected to the upper side of the rotating arm. The rotating arm is equipped with a wheelbase adjustment mechanism. A rotating arm drive mechanism for rotating the rotating arm is provided on one side of the mounting plate. A height adjustment mechanism for reciprocating up and down movement of the mounting plate is provided on the upper side of the load-bearing beam. A load-bearing beam rotation mechanism for rotating the load-bearing beam is provided on the side of the load-bearing beam near the second gear.

[0006] As a further improvement to the above solution, the wheelbase adjustment mechanism includes a second servo motor fixedly connected to one side of the rotating arm. The output end of the second servo motor is fixedly connected to a bidirectional threaded rod rotatably connected to one side of the rotating arm. Two threaded sleeves are threaded onto the bidirectional threaded rod, and a clamping arm is fixedly connected to one side of each threaded sleeve. Two second slide rails are fixedly connected to the side of the rotating arm near the clamping arm. The two second slide rails are slidably connected to the two clamping arms simultaneously. A chuck rotation mechanism is provided on each of the two clamping arms.

[0007] As a further improvement to the above solution, the chuck rotation mechanism includes a fourth servo motor fixedly connected to the inner side of one of the clamping arms, a third gear fixedly connected to the output end of the fourth servo motor, the third gear meshing with a fourth gear rotatably connected to one side of the clamping arm, and a chuck unit fixedly connected to the side of the fourth gear away from the clamping arm.

[0008] As a further improvement to the above solution, the rotating arm drive mechanism includes a No. 5 servo motor fixedly connected to one side of the mounting plate, and a No. 5 gear fixedly connected to the output end of the No. 5 servo motor, which meshes with the No. 6 gear.

[0009] As a further improvement to the above solution, the height adjustment mechanism includes a fixed plate fixedly connected to the upper side of the load-bearing beam. A servo motor is fixedly connected to one side of the fixed plate. The output end of the servo motor passes through the fixed plate and is fixedly connected to multiple sprockets. The multiple sprockets are respectively connected to multiple chains for transmission.

[0010] As a further improvement to the above solution, the load-bearing beam rotation mechanism includes a No. 3 servo motor fixedly connected to one side of the load-bearing beam, and a No. 1 gear fixedly connected to the output end of the No. 3 servo motor, which meshes with the No. 2 gear.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model uses a height adjustment mechanism and a wheelbase adjustment mechanism to work together. When the wheelbase of the clamping arm is widened to accommodate longer workpieces, the sprocket rotates and drives the chain to pull up the mounting plate, thereby raising the height of the rotating arm and creating rotation space for the rotating arm to rotate, thus avoiding collision with the ground.

[0013] 2. This utility model uses the rotation of the No. 2 servo motor to drive the two threaded sleeves to move closer or further apart, directly pushing the two clamping arms to adjust the distance between the two chuck units fixing the workpiece. This allows the positioner to load workpieces of more sizes for welding robots to weld, making it highly practical. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a three-axis positioner with adjustable wheelbase provided by this utility model;

[0015] Figure 2 for Figure 1 Side view;

[0016] Figure 3 for Figure 1 A schematic diagram of the exploded structure;

[0017] Figure 4 for Figure 1 A schematic diagram of a partial structure;

[0018] Figure 5 for Figure 1 Schematic diagram of the drive mechanism for the rotating arm;

[0019] Figure 6 for Figure 1 A schematic diagram of the height adjustment mechanism.

[0020] Explanation of key symbols:

[0021] 1. Base; 2. Clamping arm; 3. Chuck unit; 4. Rotating arm; 5. Cover plate; 6. Load-bearing beam; 7. No. 1 slide rail; 8. No. 1 servo motor; 9. Fixing plate; 10. Chain; 11. No. 2 slide rail; 12. No. 2 servo motor; 13. Bidirectional threaded rod; 14. No. 3 servo motor; 15. No. 1 gear; 16. No. 2 gear; 17. No. 4 servo motor; 18. Threaded sleeve; 19. No. 3 gear; 20. No. 4 gear; 21. Mounting plate; 22. No. 5 gear; 23. No. 6 gear; 24. Tie clamp; 25. Counterweight; 26. Sprocket; 27. No. 5 servo motor. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example:

[0024] Please combine Figures 1-6 This embodiment of a three-axis positioner with adjustable wheelbase includes a base 1. A second gear 16 is fixedly connected to the upper side of the base 1. A load-bearing beam 6 is rotatably connected to the upper side of the second gear 16. An electrical control cabinet is installed on one side of the load-bearing beam 6. The load-bearing beam 6 has a hollow structure, and a counterweight 25 is slidably connected to the inner side of the load-bearing beam 6. In this embodiment, four chains 10 are fixedly connected to the upper side of the counterweight 25. The other ends of the four chains 10 are all fixedly connected to a tie 24. A mounting plate 21 is fixedly connected to the lower side of the tie 24. Two first-order slide rails 7 are fixedly connected to the side of the load-bearing beam 6 near the mounting plate 21. The two first-order slide rails 7 allow the mounting plate 21 to run more smoothly and with higher precision control, which is beneficial to welding quality. To improve performance, two slide rails 7 are simultaneously slidably connected to the mounting plate 21. A gear 23 is rotatably connected to the side of the mounting plate 21 away from the load-bearing beam 6. A rotating arm 4 is fixedly connected to the side of the gear 23 away from the mounting plate 21. A baffle plate 5 is fixedly connected to the upper side of the rotating arm 4 to block flying metal and protect workers. The rotating arm 4 is equipped with a wheelbase adjustment mechanism to adapt to workpieces of different lengths. A rotating arm drive mechanism is provided on one side of the mounting plate 21 to rotate the rotating arm 4. A height adjustment mechanism for the mounting plate 21 to move up and down is provided on the upper side of the load-bearing beam 6. A load-bearing beam rotation mechanism is provided on the side of the load-bearing beam 6 near the gear 16 to rotate the load-bearing beam 6.

[0025] Please combine Figure 3As shown, the wheelbase adjustment mechanism includes a second servo motor 12 fixedly connected to one side of the rotating arm 4. The output end of the second servo motor 12 is fixedly connected to a bidirectional threaded rod 13 rotatably connected to one side of the rotating arm 4. Two threaded sleeves 18 are threadedly sleeved on the bidirectional threaded rod 13. A clamping arm 2 is fixedly connected to one side of each threaded sleeve 18. Two second slide rails 11 are fixedly connected to the side of the rotating arm 4 near the clamping arm 2. The two second slide rails 11 are slidably connected to the two clamping arms 2 at the same time. A chuck rotation mechanism is provided on each of the two clamping arms 2.

[0026] Please combine Figure 4 As shown, the chuck rotation mechanism includes a fourth servo motor 17 fixedly connected to the inner side of one of the clamping arms 2. A third gear 19 is fixedly connected to the output end of the fourth servo motor 17. The third gear 19 meshes with a fourth gear 20 that is rotatably connected to one side of the clamping arm 2. A chuck unit 3 is fixedly connected to the side of the fourth gear 20 away from the clamping arm 2. When the fourth gear 20 rotates, it can drive the chuck unit 3 to rotate, thereby realizing the rotation adjustment of the workpiece.

[0027] Please combine Figure 5 As shown, the rotating arm drive mechanism includes a No. 5 servo motor 27 fixedly connected to one side of the mounting plate 21. The No. 5 servo motor 27 is mounted on the back side of the mounting plate 21. The output end of the No. 5 servo motor 27 is fixedly connected to a No. 5 gear 22, which meshes with a No. 6 gear 23.

[0028] Please combine Figure 6 As shown, the height adjustment mechanism includes a fixed plate 9 fixedly connected to the upper side of the load-bearing beam 6. A servo motor 8 is fixedly connected to one side of the fixed plate 9. The output end of the servo motor 8 passes through the fixed plate 9 and is fixedly connected to four sprockets 26. The four sprockets 26 are respectively connected to four chains 10 for transmission.

[0029] Please combine Figure 5 As shown, the load-bearing beam rotation mechanism includes a No. 3 servo motor 14 fixedly connected to one side of the load-bearing beam 6. The output end of the No. 3 servo motor 14 is fixedly connected to a No. 1 gear 15, which meshes with a No. 2 gear 16. When the operator needs to load or unload materials, the two clamping arms 2 can be moved to the side away from the welding robot by starting the No. 3 servo motor 14, thus facilitating the operator to load or unload materials.

[0030] The implementation principle of a three-axis positioner with adjustable wheelbase in this embodiment is as follows: The operator first starts servo motor 27 (number 5), which drives the bidirectional threaded rod 13 to rotate, pushing the two gripping arms 2 closer together or further apart, so that the wheelbase between the two chuck units 3 matches the length of the current workpiece. Then, by fixing the grippers on the chuck unit 3, the workpiece is fixed on the positioner. Servo motor 17 (number 4) is started, driving gear 19 (number 3) to rotate, which in turn drives gear 20 (number 4) to rotate, which in turn drives chuck unit 3 to rotate, thus adjusting the welding surface of the workpiece. When it is necessary to adjust the tilt position of the entire workpiece in the vertical plane, servo motor 27 (number 5) is started, driving gear 22 (number 5) to rotate, which in turn drives gear 23 (number 6) to rotate, thereby achieving the tilting effect of the rotating arm 4, facilitating the welding needs of the welding robot. For workpieces with large lengths, requiring a large axial distance between the two clamping arms 2, the height of the rotating arm 4 needs to be raised before rotating it. At this time, the first servo motor 8 is started, which drives the sprocket 26 to rotate, thereby achieving the purpose of driving the chain 10. At this time, the counterweight 25 fixed at one end of the chain 10 slides inside the load-bearing beam 6, while the other end pulls the mounting plate 21 upward. During the welding process, the shielding plate 5 can shield the hot molten metal chips from splashing, protecting the workers. When the welding is completed and the workpiece needs to be unloaded or reloaded, the third servo motor 14 is started, which drives the first gear 15 to rotate, meshing with the second gear 16, pushing the load-bearing beam 6 to rotate, thereby rotating the workpiece 180 degrees away from the welding robot, making it easier for the workers to load and unload the workpiece.

[0031] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A three-axis positioner with adjustable wheelbase, comprising a base (1), characterized in that, A second gear (16) is fixedly connected to the upper side of the base (1). A load-bearing beam (6) is rotatably connected to the upper side of the second gear (16). A counterweight (25) is slidably connected to the inner side of the load-bearing beam (6). Multiple chains (10) are fixedly connected to the upper side of the counterweight (25). The other ends of the multiple chains (10) are fixedly connected to a tie rod (24). A mounting plate (21) is fixedly connected to the lower side of the tie rod (24). Two first slide rails (7) are fixedly connected to the side of the load-bearing beam (6) near the mounting plate (21). The two first slide rails (7) are slidably connected to the mounting plate (21) at the same time. (21) A sixth gear (23) is rotatably connected to the side away from the load-bearing beam (6). A rotating arm (4) is fixedly connected to the side of the sixth gear (23) away from the mounting plate (21). A baffle plate (5) is fixedly connected to the upper side of the rotating arm (4). The rotating arm (4) is provided with a wheelbase adjustment mechanism. A rotating arm drive mechanism for rotating the rotating arm (4) is provided on one side of the mounting plate (21). A height adjustment mechanism for reciprocating up and down movement of the mounting plate (21) is provided on the upper side of the load-bearing beam (6). A load-bearing beam rotation mechanism for rotating the load-bearing beam (6) is provided on the side of the load-bearing beam (6) near the second gear (16).

2. The three-axis positioner with adjustable wheelbase as described in claim 1, characterized in that, The wheelbase adjustment mechanism includes a second servo motor (12) fixedly connected to one side of the rotating arm (4). The output end of the second servo motor (12) is fixedly connected to a bidirectional threaded rod (13) rotatably connected to one side of the rotating arm (4). Two threaded sleeves (18) are threadedly sleeved on the bidirectional threaded rod (13). A clamping arm (2) is fixedly connected to one side of each threaded sleeve (18). Two second slide rails (11) are fixedly connected to the side of the rotating arm (4) near the clamping arm (2). The two second slide rails (11) are slidably connected to the two clamping arms (2) at the same time. A chuck rotation mechanism is provided on each of the two clamping arms (2).

3. A three-axis positioner with adjustable wheelbase as described in claim 2, characterized in that, The chuck rotation mechanism includes a fourth servo motor (17) fixedly connected to the inner side of one of the clamping arms (2), a third gear (19) fixedly connected to the output end of the fourth servo motor (17), the third gear (19) meshing with a fourth gear (20) rotatably connected to one side of the clamping arm (2), and a chuck unit (3) fixedly connected to the side of the fourth gear (20) away from the clamping arm (2).

4. A three-axis positioner with adjustable wheelbase as described in claim 1, characterized in that, The rotating arm drive mechanism includes a No. 5 servo motor (27) fixedly connected to one side of the mounting plate (21). The output end of the No. 5 servo motor (27) is fixedly connected to a No. 5 gear (22), which meshes with the No. 6 gear (23).

5. A three-axis positioner with adjustable wheelbase as described in claim 1, characterized in that, The height adjustment mechanism includes a fixed plate (9) fixedly connected to the upper side of the load-bearing beam (6). A first servo motor (8) is fixedly connected to one side of the fixed plate (9). The output end of the first servo motor (8) passes through the fixed plate (9) and is fixedly connected to multiple sprockets (26). The multiple sprockets (26) are respectively connected to multiple chains (10) for transmission.

6. A three-axis positioner with adjustable wheelbase as described in claim 1, characterized in that, The load-bearing beam rotation mechanism includes a third servo motor (14) fixedly connected to one side of the load-bearing beam (6), and a first gear (15) fixedly connected to the output end of the third servo motor (14), which meshes with the second gear (16).

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