Motor shell welding device

Abstract

The invention relates to the technical field of welding, and discloses a motor shell welding device which comprises a base, an outer welding mechanical arm and an inner welding mechanical arm, the outer welding mechanical arm is fixed outside the base, the inner welding mechanical arm is arranged above the base, the center of the base is rotatably connected with a center rod, and the center rod is slidably sleeved with a lifting sliding sleeve; a plurality of sliding blocks are arranged on the edge of the top face of the base in a sliding mode, inner vertical limiting rollers and horizontal bearing rollers are arranged on the tops of the sliding blocks, and a plurality of L-shaped limiting blocks are arranged on the periphery of the outer side of the lifting sliding sleeve. Compared with the prior art, the motor end cover welding device has the advantages that interference with a protruding structure of a motor shell is avoided through the external expansion mechanism, the motor shell welding device can adapt to motor shells of different sizes, welding spots are moved in a mode of rotating the motor shell, the rotating speed of the motor end cover and the rotating speed of the motor shell can be kept constant, and it is guaranteed that shell gaps do not slip; and a good welding effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a motor housing welding device. Background Art

[0002] The motor casing is generally composed of a cylindrical shell and an end cover. The cylindrical shell and the end cover are generally connected by flange connection or welding. For some motor casings with water-cooling structures, welding is selected to provide a good sealing effect. Currently, common motor casing welding equipment fixes the shell and the end cover by external clamping, and uses a welding robot arm to weld the external seams of the shell. During the welding process, the shell and the end cover are rotated to move the welding point.

[0003] In order to keep the shell and the end cover aligned during rotation, the clamping mechanism of the welding device is generally fixed to the same rotating shaft to clamp the shell and the end cover for rotation. However, various new motors currently have installation structures for various control devices added to the outside of the shell, making it difficult for externally clamped welding equipment to adapt to such motors. At the same time, such motors often have higher requirements for welding effects. In addition to external seam welding, internal seam welding is also required. It is difficult to set up a welding robot arm in the space inside the shell using internally clamped welding equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing motor housing welding device is difficult to adapt to the motor with a complex outer shell shape and difficult to achieve welding of the inner seam, and a motor housing welding device is provided.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a motor casing welding device, which includes a base, an external welding mechanical arm and an internal welding mechanical arm, the external welding mechanical arm is fixed to the outside of the base, the internal welding mechanical arm is arranged above the base, a center rod is rotatably connected to the center of the base, a lifting sleeve is slidably sleeved on the center rod, a plurality of sliding blocks are slidably arranged on the edge of the top surface of the base, a vertical limiting roller and a horizontal supporting roller are arranged on the top of the sliding block, a motor casing is placed on the top of the supporting roller, a motor end cover is placed on the top of the motor casing, the limiting roller is fitted with the motor casing, a bearing hole is provided in the center of the motor end cover, a plurality of L-shaped limiting blocks are arranged around the outer side of the lifting sleeve, and the L-shaped limiting blocks are fitted with the inner wall of the bearing hole.

[0006] A pitch adjusting disk is rotatably connected inside the base, and the pitch adjusting disk is provided with a plurality of inclined pitch adjusting slots. An extension cylinder extending vertically downward is provided at the bottom of the slider, and the extension cylinder passes through the pitch adjusting slot, and a reducer is suspended at the end. An input shaft is provided on the side of the reducer, and the reducer points to the central axis of the base. The axis of the input shaft is set as a polygonal shaft hole. A plurality of transmission shafts are rotatably arranged inside the base, and the cross-section of the transmission shaft is matched with the polygonal shaft hole and passes through the polygonal shaft hole.

[0007] The lifting sleeve is hingedly provided with a plurality of first connecting rods and a second connecting rod on the side thereof, the end of the first connecting rod is hingedly connected to the top of the back side of the L-shaped limit block, the second connecting rod is hingedly connected to the bottom of the back side of the L-shaped limit block, a traction ring is vertically slidably sleeved at the bottom of the lifting sleeve, a plurality of traction rods are hingedly provided on the traction ring, and the end of the traction rod is hingedly connected to the bottom of the L-shaped limit block.

[0008] Furthermore, a plurality of slide grooves are arranged on the top surface of the base, the sliders are slidably connected to the slide grooves, and the axial direction of the slide grooves is parallel to the axial direction of the transmission shaft.

[0009] Furthermore, a worm wheel is arranged at the center of the pitch adjusting disk, a worm engaged with the worm wheel is arranged in the base, and a pitch adjusting motor driving the worm is arranged.

[0010] Furthermore, a first bevel gear is arranged at one end of the transmission shaft pointing to the central axis of the base, and a second bevel gear is arranged at the center of the base to mesh with the first bevel gear.

[0011] Furthermore, a first gear is arranged at the bottom of the second bevel gear, a main motor is arranged in the base, the main motor is powered and connected to a transfer case, the transfer case is provided with power connections to an extension shaft and a continuously variable transmission, and a second gear is arranged at the output end of the continuously variable transmission to mesh with the first gear.

[0012] Furthermore, the extension shaft extends upward to be dynamically connected to the center rod, and the cross-section of the center rod is set to be a polygon.

[0013] Furthermore, the output end of the reducer is dynamically connected to the limiting roller.

[0014] Furthermore, the bottom of the lifting sleeve is rotatably connected to the lifting platform, the internally welded mechanical arm is hoisted at the bottom of the lifting platform, and a lifting screw for driving the lifting platform is arranged on the top surface of the base.

[0015] Furthermore, the bottom of the traction ring is rotatably sleeved with the extension arm, a hydraulic cylinder is vertically arranged on the side of the lifting platform, and the free end of the hydraulic cylinder is connected to the extension arm.

[0016] The advantages of the present invention compared with the prior art are: The external expansion mechanism is used to achieve limited clamping from the inside of the motor end cover and the motor housing, which will not interfere with the protruding structure of the motor housing and can also adapt to motor housings of different sizes.

[0017] The welding point is moved by rotating the motor housing, and the rotation speed of the motor end cover and the motor housing can be kept constant, ensuring that the housing gap does not slip, thereby achieving a good welding effect.

[0018] A transmission mechanism is provided to simultaneously realize distance adjustment, power transmission and rotation speed matching of the outer expansion mechanism, and can automatically match according to the size of the shell to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the present invention when it is in use.

[0021] Figure 3 It is a schematic diagram of the internal structure of the base of the present invention.

[0022] Figure 4 Yes Figure 3 Enlarged schematic diagram of point a in the middle.

[0023] Figure 5 It is a structural schematic diagram of a slider of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the lifting sleeve of the present invention.

[0025] Figure 7 Yes Figure 6 Enlarged schematic diagram of point b in the middle.

[0026] Figure 8 It is a schematic diagram of the L-shaped limiting block of the present invention being retracted.

[0027] Fig. 9 It is a schematic diagram of the outward expansion of the L-shaped limiting block of the present invention.

[0028] Fig.10 It is a schematic diagram of the outward expansion of the limiting roller of the present invention.

[0029] Fig.11 It is a structural schematic diagram of the base when the limiting roller of the present invention is expanded outward.

[0030] Fig.12 It is a schematic diagram of the limiting roller retracting of the present invention.

[0031] Fig.13 It is a structural schematic diagram of a base when the limiting roller is retracted inwardly according to the present invention.

[0032] As shown in the figure: 1. Motor end cover; 2. Bearing hole; 3. Motor housing; 4. Base; 5. External welding mechanical arm; 6. Center rod; 7. Lifting sleeve; 8. Lifting platform; 9. Internal welding mechanical arm; 10. Lifting screw; 11. Screw motor; 12. Slide; 13. Sliding block; 14. Limit roller; 15. Support roller; 16. Extension tube; 17. Reducer; 18. Pitch adjustment disk; 19. Pitch adjustment slot; 20. Worm wheel; 21. Worm; 22. Pitch adjustment motor ; 23. Drive shaft fixing block; 24. Drive shaft; 25. First bevel gear; 26. Second bevel gear; 27. First gear; 28. Main motor; 29. ​​Transfer case; 30. Extension shaft; 31. CVT; 32. Adjustment motor; 33. Second gear; 34. Input shaft; 35. Polygonal shaft hole; 36. L-shaped limit block; 37. First connecting rod; 38. Second connecting rod; 39. Towing ring; 40. Towing rod; 41. Extension arm; 42. Hydraulic cylinder. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0034] Combined with Figure 1 , Attachment Figure 2 , and attached Figure 7 A motor housing welding device comprises a base 4, an external welding mechanical arm 5 and an internal welding mechanical arm 9, the external welding mechanical arm 5 is fixed to the outside of the base 4, the center of the base 4 is rotatably connected to set a center rod 6, the center rod is slidably sleeved with a lifting sleeve 7, the bottom of the lifting sleeve 7 is rotatably sleeved with a lifting platform 8, the internal welding mechanical arm 9 is hoisted at the bottom of the lifting platform 8, the top surface of the base 4 is provided with a lifting screw 10 for driving the lifting platform 8, and a screw motor 11 for driving the lifting screw 10 is provided, a plurality of slide grooves 12 are arranged on the top surface of the base 4, a slider 13 is slidably connected with the slide groove 12, a vertical limiting roller 14 and a horizontal supporting roller 15 are arranged on the top of the slider 13, a motor housing 3 is placed on the top of the supporting roller 15, a motor end cover 1 is placed on the top of the motor housing 3, the limiting roller 14 is in contact with the motor housing 3, a bearing hole 2 is arranged in the center of the motor end cover 1, a plurality of L-shaped limiting blocks 36 are arranged around the outer side of the lifting sleeve 7, and the L-shaped limiting blocks 36 are in contact with the inner wall of the bearing hole 2.

[0035] Before the present invention works, the motor end cover 1 and the motor casing 3 to be welded need to be placed on the base 4 by hoisting or other means, the inner welding robot arm 9 is located inside the motor casing 3 to weld the inner seam, and the outer welding robot arm 5 is located outside the motor casing 3 to weld the outer seam. The central rod 6 is rotated to drive the multiple L-shaped limit blocks 36 on the lifting sleeve 7 to expand and tighten the bearing hole 2, thereby driving the motor end cover 1 to rotate, and at the same time, the motor casing 3 is driven to rotate by the limit roller 14, so that the outer welding robot arm 5 and the inner welding robot arm 9 are rotated relative to the motor end cover 1 and the motor casing 3 to change the welding point position.

[0036] Combined with Figure 6 and attached Figure 7 The lifting sleeve 7 is hingedly provided with a plurality of first connecting rods 37 and second connecting rods 38 on the side thereof, and the first connecting rods 37 and second connecting rods 38 are evenly arranged along the circumferential direction of the lifting sleeve 7. The end of the first connecting rod 37 is hingedly connected to the top of the back side of the L-shaped limit block 36, and the second connecting rod 38 is hingedly connected to the bottom of the back side of the L-shaped limit block 36. A traction ring 39 is vertically slidably sleeved at the bottom of the lifting sleeve 7, and a plurality of traction rods 40 are hingedly provided on the traction ring 39. The ends of the traction rods 40 are hingedly connected to the bottom of the L-shaped limit block 36 in a one-to-one correspondence. The bottom of the traction ring 39 is rotatably sleeved with an extension arm 41. A hydraulic cylinder 42 is vertically arranged on the side of the lifting platform 8, and the free end of the hydraulic cylinder 42 is connected to the extension arm 41.

[0037] In the above structure, the extension arm 41 drives the traction ring 39 to rise and fall by controlling the hydraulic cylinder 42, so that the L-shaped limit block 36 expands or retracts. Figure 8 For the external expansion status, please refer to the attached Fig. 9 .

[0038] The L-shaped limit block 36 and the limit roller 14 are both equipped with an adjustable external expansion mechanism to adapt to motor end covers 1 and motor housings 3 of different sizes. In order to ensure a good welding effect, during the welding process, the rotational linear speeds of the motor end cover 1 and the motor housing 3 at the joint are required to be equal. The present invention simultaneously realizes the external expansion mechanism and the corresponding rotational speed output and adjustment through the following mechanism.

[0039] Combined with Figure 3 , Attachment Figure 4 and attached Figure 5 A pitch-adjusting disk 18 is rotatably connected in the base 4, and the pitch-adjusting disk 18 is provided with a plurality of inclined pitch-adjusting slots 19. An extension tube 16 extending vertically downward is provided at the bottom of the slider 13, and the extension tube 16 passes through the pitch-adjusting slot 19, and a reducer 17 is suspended at the end. The output end of the reducer 17 is dynamically connected to the limiting roller 14, and an input shaft 34 is provided on the side of the reducer 17. The reducer 17 points to the central axis of the base 4, and the axis of the input shaft 34 is set as a polygonal shaft hole 35. The base 4 is provided with a plurality of transmission shaft fixing blocks 23, and the transmission shaft fixing blocks 23 are rotatably connected with a transmission shaft 24. The cross section of the transmission shaft 24 is arranged in accordance with the polygonal shaft hole 35 and passes through the polygonal shaft hole 35. A worm wheel 20 is arranged at the center of the pitch-adjusting disk 18, and a worm 21 meshing with the worm wheel 20 is provided in the base 4, and a pitch-adjusting motor 22 driving the worm 21 is provided, and the pitch-adjusting motor 22 is fixed to the housing of the base 4.

[0040] Since the slider 13 and the extension tube 16 are on the same vertical axis, the positions of the slider 13 and the extension tube 16 are respectively limited by the slide groove 12 and the distance adjusting groove 19, so the overall position of the two is at the intersection of the slide groove 12 and the distance adjusting groove 19. When the distance adjusting disk 18 rotates, due to the inclination of the distance adjusting groove 19, its intersection with the slide groove 12 will move away from or approach the center of the base 4. The distance adjusting disk 18 is rotated by driving the worm 21 and the worm wheel 20 through the distance adjusting motor 22, which can synchronously change the positions of multiple limit rollers 14 to adapt to motor housings 3 of different sizes.

[0041] The extended state of the limit roller 14 is shown in the attached Fig.10 and attached Fig.11 , the limit roller 14 retracted state refers to the attached Fig.12 and attached Fig.13 .

[0042] When the position of the slider 13 changes, the reducer 17 synchronously slides on the transmission shaft 24. Since the input shaft 34 of the reducer 17 is provided with a polygonal shaft hole 35 which meshes with the transmission shaft 24, when the reducer 17 slides on the axis of the transmission shaft 24, the rotation of the transmission shaft 24 can still realize power transmission to the reducer 17.

[0043] Combined with Figure 4 A first bevel gear 25 is arranged at one end of the transmission shaft 24 pointing to the axis center of the base 4, a second bevel gear 26 is arranged at the center of the base 4 to mesh with the first bevel gear 25, a first gear 27 is arranged at the bottom of the second bevel gear 26, a main motor 28 is arranged in the base 4, the main motor 28 is connected to the transfer case 29 by power, the transfer case 29 is provided with an extension shaft 30 and a continuously variable transmission 31, a second gear 33 is arranged at the output end of the continuously variable transmission 31 to mesh with the first gear 27, the extension shaft 30 extends upward to be connected to the center rod 6 by power, and the cross section of the center rod 6 is set to a polygon.

[0044] The main motor 28 transmits power to the center rod 6 and the second bevel gear 26 through the transfer case 29. The center rod 6 drives the motor end cover 1 to rotate by external expansion clamping. The second bevel gear 26 drives multiple first bevel gears 25 to rotate so that the transmission shaft 24 rotates accordingly, thereby driving the motor housing 3 to rotate through the reducer 17 and the limiting roller 14.

[0045] In the above transmission structure, the rotational speeds output by the center rod 6 and the limit roller 14 are relatively fixed. For motors of different sizes, the larger the radius of the circle formed by the weld, the greater the linear speed at the weld. It is necessary to increase the rotational speed of the limit roller 14 so that the rotational speed of the motor housing 3 driven by it is equal to the rotational speed of the motor end cover 1 driven by the center rod 6, and the required rotational speed of the limit roller 14 is proportional to the length of the limit roller 14 from the center axis of the base 4. Therefore, a continuously variable transmission 31 is added between the transfer case 29 and the transmission mechanism of the second bevel gear 26. The continuously variable transmission 31 belongs to the prior art and is not further described in this application. An adjustment mechanism for driving the continuously variable transmission 31 with an adjustment motor 32 is provided outside the continuously variable transmission 31 to electrically adjust the speed ratio of the continuously variable transmission 31.

[0046] When the above-mentioned speed change mechanism is implemented, a commonly used speed sensor and a PLC or other form of control computer can be set outside the base 4, and the control signal of the regulating motor 32 can be adjusted according to the data collected by the speed sensor. After the motor end cover 1 and the motor housing 3 are placed on the base 4, the corresponding clamping mechanisms are adjusted to clamp the motor end cover 1 and the motor housing 3 respectively, and the main motor 28 is started to rotate. The speed of the motor end cover 1 and the motor housing 3 is detected by an external speed sensor respectively, and the regulating motor 32 is controlled to change the speed ratio of the continuously variable transmission 31 until the speeds of the motor end cover 1 and the motor housing 3 are stable and equal. At this time, the external welding robot arm 5 and the internal welding robot arm 9 are controlled to start welding.

[0047] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by it, and does not deviate from the purpose of the invention, and does not creatively design a structure and implementation method similar to the technical solution, they should all fall within the protection scope of the present invention.

Claims

1. A motor housing welding device, comprising a base (4), an external welding mechanical arm (5) and an internal welding mechanical arm (9), wherein the external welding mechanical arm (5) is fixed to the outside of the base (4), the internal welding mechanical arm (9) is arranged above the base (4), a central rod (6) is rotatably connected to the center of the base (4), a lifting sleeve (7) is slidably sleeved on the central rod, a plurality of sliders (13) are slidably arranged on the edge of the top surface of the base (4), a vertical limiting roller (14) and a horizontal supporting roller (15) are arranged on the top of the slider (13), a motor housing (3) is placed on the top of the supporting roller (15), a motor end cover (1) is placed on the top of the motor housing (3), the limiting roller (14) is fitted with the motor housing (3), a bearing hole (2) is arranged at the center of the motor end cover (1), a plurality of L-shaped limiting blocks (36) are arranged around the outer side of the lifting sleeve (7), and the L-shaped limiting blocks (36) are fitted with the inner wall of the bearing hole (2), characterized in that: A pitch adjusting disk (18) is rotatably connected to the base (4), the pitch adjusting disk (18) is provided with a plurality of inclined pitch adjusting slots (19), an extension tube (16) extending vertically downward is provided at the bottom of the slider (13), the extension tube (16) passes through the pitch adjusting slot (19), and a reducer (17) is suspended at the end, an input shaft (34) is provided on the side of the reducer (17), the axis of the input shaft (34) points to the central axis of the base (4), a polygonal shaft hole (35) is provided in the input shaft (34), and a plurality of transmission shafts (24) are rotatably provided in the base (4), the cross section of the transmission shaft (24) is arranged to match the contour of the polygonal shaft hole (35) and passes through the polygonal shaft hole (35); The lifting sleeve (7) is hingedly provided with a plurality of first connecting rods (37) and second connecting rods (38) on the side thereof; the ends of the first connecting rods (37) are hingedly connected to the top of the back side of the L-shaped limit block (36); the second connecting rods (38) are hingedly connected to the bottom of the back side of the L-shaped limit block (36); a traction ring (39) is vertically slidably sleeved at the bottom of the lifting sleeve (7); a plurality of traction rods (40) are hingedly provided on the traction ring (39); and the ends of the traction rods (40) are hingedly connected to the bottom of the L-shaped limit block (36) in a one-to-one correspondence.

2. A motor housing welding device according to claim 1, characterized in that: A plurality of slide grooves (12) are arranged on the top surface of the base (4), the sliding block (13) is slidably connected to the slide groove (12), and the axial direction of the slide groove (12) is parallel to the axial direction of the transmission shaft (24).

3. The motor housing welding device according to claim 1, characterized in that: A worm gear (20) is arranged at the center of the pitch adjusting disk (18), a worm (21) meshing with the worm gear (20) is arranged in the base (4), a pitch adjusting motor (22) is arranged in the housing of the base (4), and a worm gear (21) meshing with the worm gear (20) is arranged at the power end of the pitch adjusting motor (22).

4. A motor housing welding device according to claim 3, characterized in that: A first bevel gear (25) is arranged at one end of the transmission shaft (24) pointing toward the central axis of the base (4), and a second bevel gear (26) is rotatably arranged below the central axis of the worm gear (20) and meshes with the first bevel gear (25).

5. A motor housing welding device according to claim 4, characterized in that: A first gear (27) is arranged at the bottom of the second bevel gear (26), a main motor (28) is arranged in the base (4), the main motor (28) is motively connected to a transfer case (29), the transfer case (29) is motively connected to an extension shaft (30) and a continuously variable transmission (31), and a second gear (33) is arranged at the output end of the continuously variable transmission (31) to mesh with the first gear (27).

6. A motor housing welding device according to claim 5, characterized in that: The extension shaft (30) extends upwards and is dynamically connected to the central rod (6), and the cross section of the central rod (6) is configured to be polygonal.

7. The motor housing welding device according to claim 1, characterized in that: The output end of the reducer (17) is dynamically connected to the limiting roller (14).

8. The motor housing welding device according to claim 1, characterized in that: The bottom of the lifting sleeve (7) is rotatably sleeved on the lifting platform (8), the bottom of the lifting platform (8) is hoisted with an internal welding mechanical arm (9), and the top surface of the base (4) is provided with a lifting screw (10) for driving the lifting platform (8) to move.

9. The motor housing welding device according to claim 7, characterized in that: An extension arm (41) is rotatably sleeved at the bottom of the traction ring (39), a hydraulic cylinder (42) is vertically arranged on the side of the lifting platform (8), and a free end of the hydraulic cylinder (42) is connected to the extension arm (41).

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