An automatic clamping device for motor assembly

Abstract

The utility model discloses a kind of automatic clamping equipment for motor assembly, it is related to motor assembly relevant field, to solve the moving distance of clamping structure in prior art is shorter, only can be clamped to the motor component of smaller size difference, and the component of larger size difference needs to use different clamping structure, and the problem of weaker applicability. The clamping unit includes two outer threaded rods;The clamping unit further includes two outer rotating shafts, the outer surface of the outer rotating shaft is penetrated and opened into limit slot at upper and lower ends, the outer threaded rod and outer rotating shaft outside are jointly connected with sliding push plate, outer threaded rod is connected with sliding push plate by thread, the inboard of sliding push plate is fixed with fixed ring along outer rotating shaft outside, the intermediate rotating piece is composed of limiting portion and threaded portion, the inboard of limiting portion and threaded portion is jointly fixed with inner convex strip in corresponding position of limit slot.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly, specifically to an automatic clamping device for motor assembly. Background Technology

[0002] As a widely used driving device in industrial production and daily life, the assembly quality of electric motors directly affects product performance, operational stability, and service life. In the electric motor manufacturing process, the clamping process is one of the core steps. Its purpose is to accurately position and fix key components such as the motor stator, rotor, and end covers to ensure the smooth implementation of subsequent processes such as welding, winding, and assembly.

[0003] The development of clamping equipment for motor assembly has evolved from manual to mechanized operation. Early clamping tools were mostly simple chucks or fixed clamps, requiring bolts, pressure plates, and other auxiliary components to fix parts, which was cumbersome and lacked flexibility in adjustment. With the popularization of hydraulic and pneumatic technologies, clamping equipment gradually incorporated power components such as hydraulic cylinders and air cylinders, achieving automatic opening and closing of clamps and clamping of parts through pressure control. For example, hydraulic three-jaw chucks achieve radial positioning of cylindrical parts through synchronously extending and retracting jaws, while pneumatic pressure arm devices achieve axial clamping by driving pressure blocks with air pressure.

[0004] For example, the Chinese authorized patent with publication number CN 222464408 U (A Flow-Type Operating Table for Motor Assembly) includes a table body and a table surface on top of the table body. A drive disc is located inside the table body, and a slanted slot is formed on the table surface. A connecting rod is located on the top of the drive disc, and the connecting rod is slidably connected to the slanted slot. A support is located on the top of the connecting rod, and the bottom of the support is in contact with the table surface. A top rod is also located on the support, and a gripper is installed on the top rod. A motor is fixedly installed at the bottom of the table body. A protruding rod is integrally formed on the bottom of the drive disc, and the output shaft of the motor is fixedly connected to the protruding rod. The motor can drive the drive disc to rotate. This invention, by setting multiple grippers that can deflect on the support, and through the cooperation of the drive disc and the connecting rod, can clamp motor housings of different shapes without changing clamps, effectively saving manpower and increasing assembly efficiency.

[0005] Although the aforementioned existing technology has the function of clamping components during motor assembly, the driving method of the drive structure limits the moving distance of the clamping structure to a short distance. It can only clamp motor components with small size differences. For components with large size differences, such as the motor housing and the internal stator or rotor, different clamping structures are required, resulting in weak applicability. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic clamping device for motor assembly, so as to solve the problem that the clamping structure mentioned in the background art has a short moving distance, can only clamp motor components with small size differences, and requires different clamping structures for components with large size differences, resulting in weak applicability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic clamping device for motor assembly, comprising an outer protective shell, wherein a clamping unit is fitted inside the outer protective shell, the clamping unit comprising two externally threaded rods symmetrically arranged at the lower ends of both sides inside the outer protective shell; the clamping unit further comprising two externally rotating shafts symmetrically arranged at the upper ends of both sides inside the outer protective shell, the externally threaded rods and the externally rotating shafts being rotatably connected to the inner side of the outer protective shell, and the upper and lower ends of the outer surfaces of the externally rotating shafts having limit notches extending through them; the externally threaded rods and the externally rotating shafts... An external sliding push plate is connected to the outer side. The external threaded rod is connected to the sliding push plate by a thread. The sliding push plate has a hole or groove larger than the diameter of the outer rotating shaft. A fixing ring is fixed on the inner side of the sliding push plate along the outer side of the outer rotating shaft. An intermediate rotating component is also provided outside the outer rotating shaft. The intermediate rotating component consists of a limiting part and a threaded part. The limiting part is fixed on the inner side of the threaded part. An inner protrusion is fixed inside the limiting part and the threaded part at a position corresponding to the limiting notch. A rotating groove is opened on the outer side of the inner side of the threaded part. The fixing ring is located in the rotating groove and is rotatably connected to the intermediate rotating component through a bearing.

[0008] Preferably, a trapezoidal limiting slider is threadedly connected to the outside of the threaded portion, a rectangular plate is fixed to the upper end of the trapezoidal limiting slider, a clamping member is fixed to the upper end of the inner side of the rectangular plate, and a clamping groove is formed on the inner side of the clamping member.

[0009] Preferably, a lower fixing plate is installed at the center of the upper end of the lower inner surface of the outer protective shell, a middle fixing block is fixed at the center of the upper end of the lower fixing plate, and an upper fixing block is fixed at the center of the upper end of the middle fixing block.

[0010] Preferably, a first drive motor is installed at the lower end of one side of the outer protective shell, a lower rotating shaft is transversely passed through the interior of the intermediate fixed block, the lower rotating shaft is rotatably connected to the intermediate fixed block through a bearing, two external threaded rods are fixed on both sides of the lower rotating shaft, the output shaft end of the first drive motor is connected to one end of one of the external threaded rods, and limit rods are fixed at the front and rear ends of both sides of the intermediate fixed block, and the sliding push plate slides along the limit rods.

[0011] Preferably, a second drive motor is installed at the upper end of the other side of the outer protective shell, an upper rotating shaft runs horizontally through the interior of the upper fixed block, the upper rotating shaft is rotatably connected to the upper fixed block through a bearing, two outer rotating shafts are fixed on both sides of the upper rotating shaft, and the output shaft end of the second drive motor is connected to one end of one of the outer rotating shafts.

[0012] Preferably, a connecting column is fixed at the center of the upper end of the upper fixed block, the connecting column passes through the upper surface of the outer protective shell and is fixed with a connecting plate, and a buffer pad is attached to the surface of the connecting plate.

[0013] Preferably, the lower end of the outer protective shell is welded and fixed with connecting rods at the front and rear ends, and the lower ends of the two connecting rods are welded and fixed with mounting brackets. The upper surface of the outer protective shell is provided with a limiting groove along the movement trajectory of the trapezoidal limiting slider, and the trapezoidal limiting slider slides along the limiting groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) In this utility model, the initial position of the clamping component can be flexibly adjusted according to the different sizes of the components to be clamped, which greatly improves the versatility and applicability of the equipment. It can be applied to components of various sizes during motor assembly, reducing the time and cost of equipment replacement and debugging. It solves the problem that the clamping structure has a short moving distance and can only clamp motor components with small size differences. Components with large size differences need to use different clamping structures, which has weak applicability.

[0016] (2) In this utility model, the lateral adjustment of the initial position of the intermediate rotating part and the driving rotation of the intermediate rotating part after the initial position of the intermediate rotating part is adjusted to the position are realized by the limiting notch and the inner protrusion strip, so as to realize the conversion of the clamping part in the adjustment state and the clamping state, and to realize the clamping applicability of the clamping equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device from the main viewpoint of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of the device from an elevation perspective;

[0019] Figure 3 This is a schematic diagram of the clamping unit of the device of this utility model;

[0020] Figure 4 This is a cross-sectional view of the clamping unit of the device of this utility model;

[0021] Figure 5 This is an enlarged view of the structure at point A of the device of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the intermediate rotating component of the device of this utility model.

[0023] In the diagram: 1. Outer protective shell; 2. Connecting rod; 3. Mounting bracket; 4. Limiting groove; 5. First drive motor; 6. Second drive motor; 7. Clamping unit; 8. Lower fixing plate; 9. Intermediate fixing block; 10. Upper fixing block; 11. Connecting column; 12. Connecting plate; 13. Lower rotating shaft; 14. External threaded rod; 15. Limiting rod; 16. Upper rotating shaft; 17. External rotating shaft; 18. Limiting notch; 19. Sliding push plate; 20. Fixing ring; 21. Intermediate rotating component; 22. Limiting part; 23. Threaded part; 24. Inner protrusion; 25. Rotating groove; 26. Trapezoidal limiting slider; 27. Rectangular plate; 28. Clamping component; 29. ​​Clamping groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 1-6 This embodiment mainly includes the following parts:

[0026] (1) Basic structure

[0027] The device includes an outer protective shell 1, with connecting rods 2 welded and fixed to the front and rear ends of the lower end of the outer protective shell 1. The lower ends of the two connecting rods 2 are welded and fixed to a mounting bracket 3. The mounting bracket 3 is fixed to the external drive robotic arm with screws. This design enables the robotic arm to stably drive the clamping equipment to move when it moves, realizing positioning and movement operations during the motor assembly process, and improving the flexibility and applicability of the equipment on the motor assembly line.

[0028] A lower fixing plate 8 is centrally mounted on the upper end of the lower surface inside the outer protective shell 1. A middle fixing block 9 is centrally fixed on the upper end of the lower fixing plate 8, and an upper fixing block 10 is centrally fixed on the upper end of the middle fixing block 9. This multi-layer fixing structure provides stable support and fixation for the core components of the entire equipment.

[0029] (2) Clamping unit

[0030] A clamping unit 7 is internally connected to the outer protective shell 1. The clamping unit 7 includes two threaded rods 14 symmetrically arranged at the lower ends of both sides of the outer protective shell 1; it also includes two external rotating shafts 17 symmetrically arranged at the upper ends of both sides of the outer protective shell 1. The threaded rods 14 and the external rotating shafts 17 are rotatably connected to the inner surface of the outer protective shell 1. Limiting grooves 18 are formed through the upper and lower ends of the outer surface of the external rotating shafts 17. A sliding push plate 19 is connected to both the threaded rods 14 and the external rotating shafts 17 externally. The threaded rods 14 and the sliding push plate 19 are threaded together. The sliding push plate 19 has a hole or groove larger than the diameter of the external rotating shaft 17. A fixing ring 20 is fixed to the inner side of the sliding push plate 19 along the outer side of the external rotating shaft 17. An intermediate rotating component 21 is also provided on the outer side of the external rotating shaft 17.

[0031] The intermediate rotating component 21 is composed of a limiting part 22 and a threaded part 23. The limiting part 22 is fixed to the inner side of the threaded part 23. The inner protrusion 24 is fixed in the inner side of the limiting part 22 and the threaded part 23 at the corresponding position of the limiting notch 18. A rotating groove 25 is opened on the outer side of the inner side of the threaded part 23. The fixing ring 20 is located in the rotating groove 25 and is rotatably connected to the intermediate rotating component 21 through a bearing.

[0032] A first drive motor 5 is installed at the lower end of one side of the outer protective shell 1. A lower rotating shaft 13 runs horizontally through the interior of the intermediate fixed block 9. The lower rotating shaft 13 is rotatably connected to the intermediate fixed block 9 via bearings. Two external threaded rods 14 are fixed to both sides of the lower rotating shaft 13. The output shaft end of the first drive motor 5 is connected to one end of one of the external threaded rods 14. Limit rods 15 are fixed at the front and rear ends of both sides of the intermediate fixed block 9. The sliding push plate 19 slides along the limit rods 15. The first drive motor 5 provides power for the rotation of the external threaded rods 14, and controls the sliding push plate 19 through transmission, thereby adjusting the initial position of the clamping component 28. The setting of the limit rods 15 further restricts the movement trajectory of the sliding push plate 19, ensuring its movement stability and improving the accuracy of the clamping structure position adjustment.

[0033] A trapezoidal limiting slider 26 is threadedly connected to the outside of the threaded part 23. A rectangular plate 27 is fixed to the upper end of the trapezoidal limiting slider 26, and a clamping member 28 is fixed to the upper end of the inner side of the rectangular plate 27. A clamping groove 29 is formed on the inner side of the clamping member 28. A limiting groove 4 is formed on the upper surface of the outer protective shell 1 along the movement trajectory of the trapezoidal limiting slider 26 to guide the movement of the trapezoidal limiting slider 26 and ensure the stability and accuracy of the movement of the clamping member 28.

[0034] A second drive motor 6 is installed on the upper end of the other side of the outer protective shell 1. An upper rotating shaft 16 runs horizontally through the interior of the upper fixed block 10. The upper rotating shaft 16 is rotatably connected to the upper fixed block 10 via bearings. Two outer rotating shafts 17 are fixed to both sides of the upper rotating shaft 16. The output shaft end of the second drive motor 6 is connected to one end of one of the outer rotating shafts 17. The second drive motor 6 provides power for the rotation of the outer rotating shaft 17, and through transmission, realizes the clamping action of the clamping structure.

[0035] During operation, when adjusting the initial position of the clamping component 28 according to the size of the component to be clamped, the first drive motor 5 drives the lower rotating shaft 13 and the external threaded rod 14 to rotate. Through the threaded connection between the external threaded rod 14 and the sliding push plate 19, the two sliding push plates 19 are pushed to move synchronously inward or outward. Since the fixing ring 20 fixed inside the sliding push plate 19 is located in the rotating groove 25 of the intermediate rotating component 21 and is rotatably connected to the intermediate rotating component 21 through a bearing, and the inner protrusion 24 on the intermediate rotating component 21 can slide along the limiting notch 18 opened on the surface of the outer rotating shaft 17, the movement of the sliding push plate 19 will drive the two intermediate rotating components 21 to move synchronously. Due to the connection between the trapezoidal limiting slider 26 and the intermediate rotating component 21, the clamping component 28 is driven to move synchronously inward or outward, realizing the adjustment of the initial distance between the two clamping components 28. This design allows the equipment to flexibly adapt to components of different sizes to be clamped, improves the versatility and applicability of the equipment, and reduces the time and cost consumption caused by changing clamping equipment.

[0036] (3) Connecting column and connecting plate structure

[0037] A connecting column 11 is fixed at the center of the upper end of the upper fixed block 10. The connecting column 11 passes through the upper end face of the outer protective shell 1 and is fixed with a connecting plate 12. A buffer pad is attached to the surface of the connecting plate 12. The connecting plate 12 provides end face limit, so that when the clamping component is in contact with it, it indicates that the clamping component is in place, and the various drive structures can be used for clamping, which improves the quality and reliability of motor assembly.

[0038] During clamping, the robotic arm moves the clamping device toward the clamping component, causing one end face of the clamping component to contact the end face of the connecting plate 12. Then, the second drive motor 6 drives the upper rotating shaft 16 and the outer rotating shaft 17 to rotate. Because the inner protrusion 24 on the intermediate rotating component 21 in the circumferential position is limited by the limiting notch 18 on the surface of the outer rotating shaft 17, the intermediate rotating component 21 is driven to rotate. The threaded connection between the threaded portion 23 on the intermediate rotating component 21 and the trapezoidal limiting slider 26 causes the trapezoidal limiting slider 26 to move toward the clamping component, and the clamping component 28 clamps and fixes the clamping component. This clamping method, through mechanical transmission and a limiting structure, achieves stable and precise clamping of the clamping component.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic clamping device for motor assembly, comprising an outer protective housing (1), characterized in that: The outer protective shell (1) is internally connected to a clamping unit (7). The clamping unit (7) includes two external threaded rods (14), which are symmetrically arranged at the lower ends of both sides inside the outer protective shell (1). The clamping unit (7) also includes two external rotating shafts (17), which are symmetrically arranged at the upper ends of both sides inside the outer protective shell (1). The external threaded rods (14) and the external rotating shafts (17) are rotatably connected to the inner side of the outer protective shell (1). Limiting notches (18) are provided through the upper and lower ends of the outer surface of the external rotating shafts (17). The external threaded rods (14) and the external rotating shafts (17) are connected to a sliding push plate (19). The external threaded rods (14) and the sliding push plate (19) are connected by threads. The sliding push plate (19) is provided with a hole and groove larger than the diameter of the outer rotating shaft (17). A fixing ring (20) is fixed on the inner side of the sliding push plate (19) along the outer side of the outer rotating shaft (17). An intermediate rotating component (21) is also provided on the outer side of the outer rotating shaft (17). The intermediate rotating component (21) is composed of a limiting part (22) and a threaded part (23). The limiting part (22) is fixed on the inner side of the threaded part (23). An inner protruding strip (24) is fixed in the inner side of the limiting part (22) and the threaded part (23) at the corresponding position of the limiting notch (18). A rotating groove (25) is provided on the outer side of the inner side of the threaded part (23). The fixing ring (20) is located in the rotating groove (25) and is rotatably connected to the intermediate rotating component (21) through a bearing.

2. The automatic clamping device for motor assembly according to claim 1, characterized in that: The threaded part (23) is connected to a trapezoidal limiting slider (26) by a thread. A rectangular plate (27) is fixed to the upper end of the trapezoidal limiting slider (26). A clamping member (28) is fixed to the upper end of the inner side of the rectangular plate (27). A clamping groove (29) is formed on the inner side of the clamping member (28).

3. The automatic clamping device for motor assembly according to claim 1, characterized in that: The lower fixing plate (8) is installed in the center of the upper end of the lower end face inside the outer protective shell (1). The middle fixing block (9) is fixed in the center of the upper end of the lower fixing plate (8). The upper fixing block (9) is fixed in the center of the upper end of the middle fixing block (9). The upper fixing block (10) is fixed in the center of the upper end of the middle fixing block (9).

4. The automatic clamping device for motor assembly according to claim 3, characterized in that: The lower end of one side of the outer protective shell (1) is equipped with a first drive motor (5). The lower rotating shaft (13) runs horizontally through the interior of the middle fixed block (9). The lower rotating shaft (13) and the middle fixed block (9) are rotatably connected by bearings. The two external threaded rods (14) are fixed on both sides of the lower rotating shaft (13). The output shaft end of the first drive motor (5) is connected to one end of one of the external threaded rods (14). The front and rear ends of both sides of the middle fixed block (9) are fixed with limit rods (15). The sliding push plate (19) slides along the limit rods (15).

5. The automatic clamping device for motor assembly according to claim 4, characterized in that: A second drive motor (6) is installed on the upper end of the other side of the outer protective shell (1). An upper rotating shaft (16) runs horizontally through the interior of the upper fixed block (10). The upper rotating shaft (16) and the upper fixed block (10) are rotatably connected by bearings. Two outer rotating shafts (17) are fixed on both sides of the upper rotating shaft (16). The output shaft end of the second drive motor (6) is connected to one end of one of the outer rotating shafts (17).

6. The automatic clamping device for motor assembly according to claim 3, characterized in that: The upper fixed block (10) is fixed with a connecting column (11) at the center of the upper end. The connecting column (11) passes through the upper surface of the outer protective shell (1) and is fixed with a connecting plate (12). A buffer pad is pasted and fixed on the surface of the connecting plate (12).

7. The automatic clamping device for motor assembly according to claim 2, characterized in that: The lower end of the outer protective shell (1) is welded and fixed with connecting rods (2) at the front and rear ends. The lower ends of the two connecting rods (2) are welded and fixed with mounting brackets (3). The upper surface of the outer protective shell (1) is provided with a limiting groove (4) along the movement trajectory of the trapezoidal limiting slider (26). The trapezoidal limiting slider (26) slides along the limiting groove (4).

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