Lifting device with three-dimensional limiting function

Abstract

The lifting device with the three-dimensional limiting function comprises a supporting frame (1), the bottom of the supporting frame (1) is provided with a lifting device body and a lifting guide device, and the top of the supporting frame (1) is provided with a workpiece falling guide mechanism, a workpiece positioning mechanism and a workpiece clamping mechanism. The workpiece can be limited in the X direction and the Y direction and clamped in the Z direction, the workpiece is effectively positioned, and the welding precision is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to a lifting device, in particular a lifting device with three-dimensional limiting function. BACKGROUND

[0002] The existing lifting device exposes many shortcomings in actual application that cannot meet the needs of welding operation. In the aspect of mechanical positioning, it can only realize the vertical lifting of the workpiece, and after lifting is completed, there is lack of effective limiting structure for X and Y directions. When the workpiece is lifted to the welding station, due to the lack of transverse constraint, slight external force will cause displacement in left and right and front and back directions, so that the workpiece is difficult to maintain a stable posture; in Z direction, the device also lacks reliable clamping mechanism, and cannot firmly fix the workpiece, which not only easily causes up and down shaking during lifting, but also aggravates the shaking amplitude due to welding thermal deformation, mechanical vibration and other factors during welding operation. The problems of lack of X and Y direction limiting and Z direction clamping failure lead to the fact that the positioning accuracy of the workpiece cannot be guaranteed, the relative position between the welding gun and the weld is difficult to maintain accurate, which seriously affects the welding quality and production efficiency, and even may cause welding offset, welding leakage and other adverse consequences. SUMMARY

[0003] The purpose of the present application is to provide a lifting device with three-dimensional limiting function to solve the technical problems in the prior art, which can limit the workpiece in X and Y directions and clamp the workpiece in Z direction, effectively position the workpiece and ensure the welding precision.

[0004] The present application provides a lifting device with three-dimensional limiting function, comprising a support frame, the bottom of the support frame is provided with a lifting device and a lifting guide device, the top of the support frame is provided with a workpiece falling guide mechanism, a workpiece positioning mechanism and a workpiece clamping mechanism.

[0005] In the foregoing lifting device with three-dimensional limiting function, preferably, the support frame comprises a U-shaped support beam, a support vertical beam and a linear support beam, the middle part of the U-shaped support beam is fixedly connected with one end of the support vertical beam, the middle part of the linear support beam is fixedly connected with the other end of the support vertical beam, and the opening direction of the U-shaped support beam is away from the direction of the linear support beam.

[0006] In the foregoing lifting device with three-dimensional limiting function, preferably, the workpiece clamping mechanism comprises a first clamping mechanism, a second clamping mechanism and a third clamping mechanism, one end of the U-shaped support beam is fixedly provided with a first L-shaped connecting bracket, the first L-shaped connecting bracket is provided with the first clamping mechanism and a first guide plate, the other end of the U-shaped support beam is fixedly provided with a second L-shaped connecting bracket, and the second L-shaped connecting bracket is fixedly provided with a second guide plate.

[0007] Preferably, the first guide plate and the second guide plate together form the workpiece falling guide mechanism, and the upper ends of the first guide plate and the second guide plate are provided with inclined guide sliding surfaces.

[0008] Preferably, one end of the linear support beam is provided with a third L-shaped connecting bracket, the third L-shaped connecting bracket is provided with the second clamping mechanism, the other end of the linear support beam is provided with a fourth L-shaped connecting bracket, and the fourth L-shaped connecting bracket is provided with the third clamping mechanism.

[0009] Preferably, the first clamping mechanism, the second clamping mechanism and the third clamping mechanism are completely the same in structure, and each of them comprises a cylinder mounting plate, a clamping cylinder, a clamping block and a workpiece support table, the clamping cylinder and the workpiece support table are fixedly installed on the cylinder mounting plate, one side of the workpiece support table facing the clamping cylinder is formed with a connecting protrusion, one end of the clamping block is rotationally connected with the end of the cylinder rod of the clamping cylinder, and the middle part of the clamping block is connected with the connecting protrusion through two connecting plates.

[0010] Preferably, the workpiece positioning mechanism comprises a secondary positioning pin and a primary positioning pin, the secondary positioning pin is fixed on the linear support beam through a positioning pin support, and the primary positioning pin is fixed on the U-shaped support beam through a primary positioning pin base.

[0011] Preferably, the lifting device comprises a lifting cylinder and a cylinder support, the lifting cylinder is fixedly arranged on the cylinder support, and the cylinder rod of the lifting cylinder is fixedly connected with the middle part of the support longitudinal beam.

[0012] Preferably, the lifting guide device comprises guide columns and guide pipes, the number of the guide columns is two, the upper ends of the two guide columns are fixedly connected with the two ends of the bottom surface of the support longitudinal beam, and the lower ends of the two guide columns are respectively inserted into and slidably connected with the two guide pipes.

[0013] Preferably, the outer wall of one of the cylinder supports is fixedly provided with a position sensor.

[0014] Compared with the prior art, the workpiece can be guided when falling on the support frame, so that the workpiece is guided to the accurate position when falling, the workpiece positioning mechanism is arranged to position the workpiece, so that the workpiece is automatically limited in the X direction and the Y direction, the workpiece cannot move in the X direction and the Y direction, the workpiece clamping mechanism is arranged to clamp the workpiece, so as to limit the freedom of the workpiece in the Z direction, the lifting guide device is arranged to keep the workpiece stable during lifting, so that the support frame cannot shake during welding, so as to ensure the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the axonometric view of the overall structure of the present application;

[0016] Figure 2 is the top view of the support frame in the present application;

[0017] Figure 3 is the front view of the lifting device in the present application;

[0018] Figure 4 is the front view of the workpiece clamping mechanism in the present application;

[0019] Figure 5 is the front view of the first guide plate in the present application;

[0020] Figure 6 is the front view of the overall structure in the present application;

[0021] Figure 7 is the front view of the main positioning pin in the present application.

[0022] BRIEF DESCRIPTION OF DRAWINGS: support frame 1, U-shaped support cross beam 2, support longitudinal beam 3, straight line type support cross beam 4, first L-shaped connecting support 5, first clamping mechanism 6, first guide plate 7, second L-shaped connecting support 8, second guide plate 9, inclined guide sliding surface 10, third L-shaped connecting support 11, second clamping mechanism 12, fourth L-shaped connecting support 13, third clamping mechanism 14, cylinder mounting plate 15, clamping cylinder 16, clamping block 17, workpiece support table 18, connecting protrusion 19, connecting plate 20, auxiliary positioning pin 21, main positioning pin 22, positioning pin support 23, main positioning pin base 24, lifting cylinder 25, cylinder support 26, guide column 27, guide pipe 28, in-place inductor 29. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] Embodiments of the present invention: such as Figures 1-7 As shown, a lifting device with three-dimensional limiting function includes a support frame 1. The bottom of the support frame 1 is provided with a lifting device and a lifting guide device, and the top of the support frame 1 is provided with a workpiece falling guide mechanism, a workpiece positioning mechanism and a workpiece clamping mechanism.

[0025] This product guides the workpiece through a workpiece falling guide mechanism, allowing it to quickly fall to the designated position on the support frame 1. The workpiece positioning mechanism and the workpiece clamping mechanism work together to limit the workpiece in the X, Y, and Z directions on the support frame 1, preventing displacement and ensuring welding accuracy.

[0026] Specifically, the support frame 1 includes a U-shaped support beam 2, a support longitudinal beam 3, and a straight support beam 4. The middle part of the U-shaped support beam 2 is fixedly connected to one end of the support longitudinal beam 3 by a bolt assembly, and the middle part of the straight support beam 4 is fixedly connected to the other end of the support longitudinal beam 3 by a bolt assembly. The opening direction of the U-shaped support beam 2 is facing away from the straight support beam 4.

[0027] The support frame 1 of this product has a simple structure and uses less material, which reduces manufacturing costs while meeting the workpiece support requirements.

[0028] The workpiece clamping mechanism includes a first clamping mechanism 6, a second clamping mechanism 12 and a third clamping mechanism 14. One end of the U-shaped support beam 2 is fixedly provided with a first L-shaped connecting bracket 5. The first L-shaped connecting bracket 5 is provided with the first clamping mechanism 6 and a first guide plate 7. The other end of the U-shaped support beam 2 is fixedly provided with a second L-shaped connecting bracket 8. The second L-shaped connecting bracket 8 is fixedly provided with a second guide plate 9.

[0029] The first guide plate 7 is located outside the first clamping mechanism 6. The first guide plate 7 and the second guide plate 9 are located in the same plane. The first guide plate 7 and the second guide plate 9 together form a workpiece falling guide mechanism. The upper ends of the first guide plate 7 and the second guide plate 9 both have inclined guide surfaces 10.

[0030] With the setting of the first guide plate 7 and the second guide plate 9, if there is a deviation in the position of the workpiece during the process of placing the workpiece into the support frame 1, it can be guided by the inclined guide surface 10 at the upper end of the first guide plate 7 and the second guide plate 9, so that one side of the workpiece falls along the first guide plate 7 and the second guide plate 9, ensuring that the position in the X direction is accurate during the falling process.

[0031] Furthermore, a third L-shaped connecting bracket 11 is fixedly installed at one end of the straight support beam 4 by a bolt assembly, and a second clamping mechanism 12 is fixedly installed on the third L-shaped connecting bracket 11 by a bolt assembly. A fourth L-shaped connecting bracket 13 is fixedly installed at the other end of the straight support beam 4 by a bolt assembly, and a third clamping mechanism 14 is fixedly installed on the fourth L-shaped connecting bracket 13 by a bolt assembly.

[0032] In this embodiment, workpiece support blocks are fixedly installed on the top surfaces of both ends of the U-shaped support beam 2 using bolt assemblies, and workpiece support blocks are also installed on the top surfaces of both ends of the straight support beam 4. The four workpiece support blocks are used to support the workpieces.

[0033] The first clamping mechanism 6, the second clamping mechanism 12, and the third clamping mechanism 14 have the same structure. They all include a cylinder mounting plate 15, a clamping cylinder 16, a clamping block 17, and a workpiece support platform 18. The clamping cylinder 16 and the workpiece support platform 18 are fixedly mounted on the cylinder mounting plate 15. A connecting protrusion 19 is formed on one side of the workpiece support platform 18. One end of the clamping block 17 is rotatably connected to the end of the cylinder rod of the clamping cylinder 16. The middle part of the clamping block 17 is connected to the connecting protrusion 19 through two connecting plates 20.

[0034] The clamping cylinder 16 is fixedly installed at the bottom of the cylinder mounting plate 15 by bolts. The cylinder rod of the clamping cylinder 16 passes through the cylinder mounting plate 15 and extends above it. The workpiece support table 18 is fixed to the top surface of the cylinder mounting plate 15 by bolts. The connecting protrusion 19 faces the cylinder rod. There are two connecting plates 20. One end of the two connecting plates 20 is rotatably connected to the middle of the clamping block 17 by a pin. The other end of the two connecting plates 20 is rotatably connected to the connecting protrusion 19 by a pin.

[0035] The workpiece positioning mechanism includes a secondary positioning pin 21 and a primary positioning pin 22. The secondary positioning pin 21 is fixed to the linear support beam 4 by a positioning pin bracket 23, and the primary positioning pin 22 is fixed to the U-shaped support beam 2 by a primary positioning pin base 24.

[0036] After the workpiece comes into contact with the four workpiece support blocks, the secondary positioning pin 21 and the main positioning pin 22 are respectively inserted into the positioning holes on the workpiece. Through the cooperation of the secondary positioning pin 21 and the main positioning pin 22 with the positioning holes on the workpiece, the workpiece cannot be displaced in the X and Y directions, thus achieving the positioning of the workpiece in the horizontal direction.

[0037] At the same time, the edge of the workpiece falls onto the workpiece support table 18. After the cylinder rods of the three clamping cylinders 16 extend, they push the free end of the clamping block 17 to fall and cooperate with the workpiece support table 18 to clamp the workpiece, reliably limiting the workpiece in the Z direction and ensuring that the workpiece remains stable in subsequent operations.

[0038] The lifting device includes a lifting cylinder 25 and a cylinder bracket 26. The lifting cylinder 25 is fixed on the cylinder bracket 26, and the cylinder rod of the lifting cylinder 25 is fixedly connected to the middle part of the supporting longitudinal beam 3.

[0039] The lifting guide device includes guide columns 27 and guide tubes 28. There are two guide columns 27. The upper ends of the two guide columns 27 are fixedly connected to both ends of the bottom surface of the supporting longitudinal beam 3, and the lower ends of the two guide columns 27 are respectively inserted into and slidably connected to the two guide tubes 28. A positioning sensor 29 is fixedly installed on the outer wall of the cylinder bracket 26.

[0040] Both the guide tube 28 and the cylinder bracket 26 are fixed on the frame of the automated production line. The guide tube 28 guides the guide column 27, so that the support frame 1 can rise and fall smoothly, and ensures that there is no shaking during welding, thus ensuring the welding accuracy.

[0041] The working principle of this invention is as follows: During operation, the operator or robotic arm guides the workpiece through the first guide plate 7 and the second guide plate 9 on the support frame 1 and places it on the support frame 1. After the workpiece is placed stably, it contacts the four workpiece support blocks. The secondary positioning pin 21 and the main positioning pin 22 are respectively inserted into the positioning holes on the workpiece. At this time, the X and Y directions of the workpiece have been accurately positioned.

[0042] The first clamping mechanism 6, the second clamping mechanism 12, and the third clamping mechanism 14 operate synchronously. The cylinder rod of the clamping cylinder 16 extends and pushes the clamping block 17 to rotate. The free end of the clamping block 17 falls and cooperates with the workpiece support table 18 to clamp the workpiece, reliably limiting the workpiece in the Z direction and ensuring that the workpiece remains stable in subsequent operations.

[0043] The lifting cylinder 25 is activated, and under the guidance of the guide column 27, it pushes the support frame 1 and the workpiece to rise smoothly to the designated height for subsequent robotic welding.

[0044] After welding is completed, the three clamping structures open and the workpiece is removed. The lifting cylinder 25 drives the support frame 1 to descend. When the position sensor 29 detects that the support frame 1 has fallen to the set position, the lifting cylinder 25 stops moving and waits for the next work cycle.

[0045] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A lifting device with three-dimensional limiting function, comprising a support frame (1), characterized in that: The bottom of the support frame (1) is provided with a lifting device and a lifting guide device, and the top of the support frame (1) is provided with a workpiece falling guide mechanism, a workpiece positioning mechanism and a workpiece clamping mechanism.

2. The lifting device with three-dimensional limiting function according to claim 1, characterized in that: The support frame (1) includes a U-shaped support beam (2), a support longitudinal beam (3) and a straight support beam (4). The middle part of the U-shaped support beam (2) is fixedly connected to one end of the support longitudinal beam (3), and the middle part of the straight support beam (4) is fixedly connected to the other end of the support longitudinal beam (3). The opening direction of the U-shaped support beam (2) is away from the straight support beam (4).

3. The lifting device with three-dimensional limiting function according to claim 2, characterized in that: The workpiece clamping mechanism includes a first clamping mechanism (6), a second clamping mechanism (12) and a third clamping mechanism (14). One end of the U-shaped support beam (2) is fixedly provided with a first L-shaped connecting bracket (5). The first L-shaped connecting bracket (5) is provided with the first clamping mechanism (6) and a first guide plate (7). The other end of the U-shaped support beam (2) is fixedly provided with a second L-shaped connecting bracket (8). The second L-shaped connecting bracket (8) is fixedly provided with a second guide plate (9).

4. The lifting device with three-dimensional limiting function according to claim 3, characterized in that: The first guide plate (7) and the second guide plate (9) together form the workpiece falling guide mechanism. The upper ends of the first guide plate (7) and the second guide plate (9) both have inclined guide surfaces (10).

5. The lifting device with three-dimensional limiting function according to claim 3, characterized in that: One end of the straight support beam (4) is fixedly provided with a third L-shaped connecting bracket (11), and the second clamping mechanism (12) is fixedly provided on the third L-shaped connecting bracket (11). The other end of the straight support beam (4) is fixedly provided with a fourth L-shaped connecting bracket (13), and the third clamping mechanism (14) is fixedly provided on the fourth L-shaped connecting bracket (13).

6. The lifting device with three-dimensional limiting function according to claim 5, characterized in that: The first clamping mechanism (6), the second clamping mechanism (12), and the third clamping mechanism (14) have the same structure. They all include a cylinder mounting plate (15), a clamping cylinder (16), a clamping block (17), and a workpiece support platform (18). The clamping cylinder (16) and the workpiece support platform (18) are fixedly mounted on the cylinder mounting plate (15). A connecting protrusion (19) is formed on the side of the workpiece support platform (18) facing the clamping cylinder (16). One end of the clamping block (17) is rotatably connected to the cylinder rod end of the clamping cylinder (16). The middle part of the clamping block (17) is connected to the connecting protrusion (19) through two connecting plates (20).

7. The lifting device with three-dimensional limiting function according to claim 2, characterized in that: The workpiece positioning mechanism includes a secondary positioning pin (21) and a primary positioning pin (22). The secondary positioning pin (21) is fixed on the straight support beam (4) by a positioning pin bracket (23), and the primary positioning pin (22) is fixed on the U-shaped support beam (2) by a primary positioning pin base (24).

8. The lifting device with three-dimensional limiting function according to claim 7, characterized in that: The lifting device includes a lifting cylinder (25) and a cylinder bracket (26). The lifting cylinder (25) is fixed on the cylinder bracket (26), and the cylinder rod of the lifting cylinder (25) is fixedly connected to the middle part of the supporting longitudinal beam (3).

9. The lifting device with three-dimensional limiting function according to claim 8, characterized in that: The lifting guide device includes guide columns (27) and guide tubes (28). There are two guide columns (27). The upper ends of the two guide columns (27) are fixedly connected to both ends of the bottom surface of the support longitudinal beam (3). The lower ends of the two guide columns (27) are respectively inserted into and slidably connected to the two guide tubes (28).

10. The lifting device with three-dimensional limiting function according to claim 8, characterized in that: A position sensor (29) is fixed on the outer wall of one of the cylinder brackets (26).

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