A welding fixture for improving stator perpendicularity

Abstract

This utility model discloses a welding fixture for improving the verticality of a stator, including a lower connecting plate. A mandrel is centrally located at the top of the lower connecting plate. A lower arc-guiding plate, sleeved on the outside of the mandrel, is located above the lower connecting plate. An inner first positioning keyway is provided on the outer wall of the mandrel, and an inner second positioning keyway is provided on the inner wall of the lower arc-guiding plate. An inner positioning key is inserted into both the inner first and inner second positioning keyways. An outer first positioning keyway is provided on the lower connecting plate outside the mandrel, and an outer positioning key is installed within the outer first positioning keyway. This utility model, through a dual-layer positioning method using inner and outer positioning keys, effectively ensures the coaxiality and verticality of each component during multi-layer structure assembly, allowing the entire welding fixture to be in a stable and precise positioning state during operation, thereby contributing to improving the verticality of the stator after welding.

Description

Technical Field

[0001] This utility model relates to a welding fixture for improving the verticality of the stator. Background Technology

[0002] In the manufacturing and assembly process of motor production equipment, the verticality of the stator has a crucial impact on the performance and operational stability of the motor. As one of the core components of the motor, the verticality of the stator installation directly affects key performance indicators such as the uniformity of the air gap between the motor rotor and stator, the electromagnetic induction effect, and the vibration and noise levels during operation.

[0003] Traditional stator welding processes often lack effective tooling specifically designed for controlling stator perpendicularity. During welding, the stator is susceptible to various factors, such as welding stress, leading to varying degrees of tilting or perpendicularity deviation. Utility Model Content

[0004] The main purpose of this invention is to provide a welding fixture for improving the verticality of the stator, so as to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved by adopting the following technical solution:

[0006] A welding fixture for improving stator perpendicularity includes a lower connecting plate, a mandrel centrally located above the lower connecting plate, a lower arc-starting plate sleeved on the outside of the mandrel above the lower connecting plate, an inner first positioning keyway on the outer wall of the mandrel, an inner second positioning keyway on the inner wall of the lower arc-starting plate, and an inner positioning key inserted into the inner first and inner second positioning keyways. An outer first positioning keyway is located on the lower connecting plate outside the mandrel, and an outer positioning key is located within the outer first positioning keyway. An upper arc-starting plate is spaced above the lower arc-starting plate, and an inner third positioning keyway is provided on the upper arc-starting plate for inserting the inner positioning key. The lower and upper arc-starting plates are respectively provided with an outer second and outer third positioning keyway for inserting the outer positioning key. An upper connecting plate is located above the upper arc-starting plate.

[0007] Preferably, the internal positioning key has a convex structure, and the external positioning key has a rectangular structure.

[0008] Preferably, there are six internal positioning keys and six external positioning keys. The six internal positioning keys are evenly distributed along the circumference of the mandrel, and the six external positioning keys are evenly distributed along the circumference of the lower connecting plate.

[0009] Preferably, a material ejector plate is provided between the lower connecting plate and the lower arc-drawing plate. The material ejector plate is provided with an inner fourth positioning keyway for inserting the inner positioning key and an outer fourth positioning keyway for passing through the outer positioning key.

[0010] Preferably, the lower connecting plate has a guide post arranged upward inside the mandrel at its center, and the upper connecting plate has a guide sleeve arranged downward at its center, with the guide post inserted into the guide sleeve.

[0011] Preferably, a guide post fixing bushing is provided between the lower connecting plate and the guide post, and a guide post pressure block is provided on the guide post fixing bushing.

[0012] Preferably, a pressure plate is provided above the inner wall of the guide post pressure block, and a ring plate is provided on the outer wall of the guide post, with the pressure plate pressing against the ring plate.

[0013] Preferably, ten lower grooves are provided on the outer wall of the lower arc plate along its circumference, and lower arc blocks are provided in the lower grooves.

[0014] Preferably, the outer wall of the upper arc plate is provided with ten upper grooves along its circumference, and the upper arc blocks are provided in the upper grooves.

[0015] The beneficial technical effects of this utility model are as follows:

[0016] This invention employs a dual-layer positioning method using both internal and external positioning keys. During multi-layer structure assembly, this effectively ensures the coaxiality and perpendicularity of each component, allowing the entire welding fixture to maintain a stable and precise positioning state during operation. This, in turn, helps improve the perpendicularity of the stator after welding. Furthermore, by incorporating guide pillars and guide sleeves, the upper connecting plate is ensured to move accurately along a predetermined vertical direction, further guaranteeing the accuracy of the stator's perpendicularity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the welding fixture structure according to an embodiment of the present utility model;

[0018] Figure 2 This is a front sectional view of the welding fixture according to an embodiment of the present invention;

[0019] Figure 3 This is a side sectional view of the welding fixture according to an embodiment of the present invention;

[0020] Figure 4 This is a top view of the stator placed on the lower arc plate according to an embodiment of the present invention;

[0021] Figure 5 This is an exploded structural diagram of the welding fixture according to an embodiment of the present invention;

[0022] Figure 6This is a schematic diagram of the lower connecting plate structure according to an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the mandrel structure according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the lower arc plate structure according to an embodiment of the present invention;

[0025] Figure 9 This is a schematic diagram of the upper arc plate structure according to an embodiment of the present invention;

[0026] Figure 10 This is a schematic diagram of the upper connecting plate structure according to an embodiment of the present utility model;

[0027] Figure 11 This is a schematic diagram of the ejector plate structure according to an embodiment of the present utility model;

[0028] Figure 12 This is a schematic diagram of the internal positioning key, external positioning key, and guide post structure of an embodiment of this utility model;

[0029] Figure 13 This is a schematic diagram of the stator structure of an embodiment of the present invention.

[0030] In the diagram: 1. Lower connecting plate; 2. Mandrel; 3. Lower arc-guiding plate; 4. Inner first positioning keyway; 5. Inner second positioning keyway; 6. Inner positioning key; 7. Outer first positioning keyway; 8. Outer positioning key; 9. Upper arc-guiding plate; 10. Outer second positioning keyway; 11. Outer third positioning keyway; 12. Upper connecting plate; 13. Unloading plate; 14. Inner fourth positioning keyway; 15. Outer fourth positioning keyway; 16. Guide post; 17. Guide sleeve; 18. Guide post fixing bushing; 19. Guide post pressure block; 20. Pressure plate; 21. Ring plate; 22. Lower groove; 23. Lower arc-guiding block; 24. Upper groove; 25. Upper arc-guiding block; 26. Stator; 27. Inner third positioning keyway. Detailed Implementation

[0031] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0032] like Figures 1-13As shown, the welding fixture for improving stator perpendicularity provided in this embodiment includes a lower connecting plate 1, a mandrel 2 disposed at the center of the upper part of the lower connecting plate 1, a lower arc-starting plate 3 sleeved on the outside of the mandrel 2 disposed above the lower connecting plate 1, an inner first positioning keyway 4 disposed on the outer side wall of the mandrel 2, and an inner second positioning keyway 5 disposed on the inner side wall of the lower arc-starting plate 3, with an inner positioning key 6 inserted into the inner first positioning keyway 4 and the inner second positioning keyway 5. An external insertion first positioning keyway 7 is provided on the outer side of shaft 2, and an external insertion positioning key 8 is provided in the external insertion first positioning keyway 7. An upper insertion arc plate 9 is provided at intervals above the lower arc plate 3. An internal insertion third positioning keyway 27 is provided on the upper arc plate 9 for inserting the internal insertion positioning key 6. An external insertion second positioning keyway 10 and an external insertion third positioning keyway 11 for inserting the external insertion positioning key 8 are respectively provided on the lower arc plate 3 and the upper arc plate 9. An upper connecting plate 12 is provided above the upper arc plate 9.

[0033] The upper connecting plate 12 connects to a power device that can be externally pressurized.

[0034] In use, the stator 26 is fitted over the mandrel 2 and placed on the lower arc-drawing plate 3. During placement, the external positioning key 8 passes through the groove on the stator 26, and the outer side of the internal positioning key 6 passes through the groove on the stator 26 and communicates with the inner wall of the stator 26, thereby achieving precise positioning of the stator 26. The upper connecting plate 12 and the upper arc-drawing plate 9 are pressed down. During the pressing process, the external positioning key 8 is inserted into the external third positioning key groove 11 of the upper arc-drawing plate 9 to ensure vertical pressing. After the upper arc-drawing plate 9 is pressed onto the stator 26, the outer wall of the stator 26 is welded.

[0035] By using a dual-layer positioning method with internal positioning key 6 and external positioning key 8, the coaxiality and perpendicularity of each component can be effectively guaranteed during the assembly of multi-layer structures, ensuring that the entire welding fixture is in a stable and accurate positioning state during operation, which in turn helps to improve the perpendicularity of stator 26 after welding.

[0036] In this embodiment, as Figure 12 As shown, the inner positioning key 6 has a convex structure, and the outer positioning key 8 has a rectangular structure. The wide part of the inner positioning key 6 is inserted into the inner first positioning keyway 4 on the spindle 2, and the narrow part of the inner positioning key 6 is inserted into the inner second positioning keyway 5. When the stator 26 is placed on the lower arc plate 3, the outer positioning key 8 will pass through the groove on the stator 26, and the narrow part of the inner positioning key 6 will pass through the groove on the stator 26 and communicate with the inner wall of the stator 26, thereby determining the position of the stator 26. The verticality accuracy of the stator 26 is ensured through double positioning.

[0037] In this embodiment, as Figure 5As shown, there are six internal positioning keys 6 and six external positioning keys 8. The six internal positioning keys 6 are evenly distributed along the circumference of the mandrel 2, and the six external positioning keys 8 are evenly distributed along the circumference of the lower connecting plate 1. This helps to achieve precise positioning from all directions during the welding process of the stator 26, thereby better ensuring the verticality of the stator 26 and avoiding problems such as the stator 26 tilting due to uneven local force or inaccurate positioning.

[0038] In this embodiment, as Figure 1 and Figure 11 As shown, a ejector plate 13 is provided between the lower connecting plate 1 and the lower arc-starting plate 3. The ejector plate 13 is provided with an inner fourth positioning keyway 14 for inserting the inner positioning key 6 and an outer fourth positioning keyway 15 for passing through the outer positioning key 8. After welding is completed, the ejector plate 13 is pushed upward with a tool to push out the stator 26 for easy removal.

[0039] In this embodiment, as Figure 2 As shown, a guide post 16 is positioned upwards at the center of the lower connecting plate 1, inside the mandrel 2, and a guide sleeve 17 is positioned downwards at the center of the upper connecting plate 12. The guide post 16 is inserted into the guide sleeve 17, and the cooperation between the guide post 16 and the guide sleeve 17 forms a precise guiding mechanism. During the use of the welding fixture, when the upper connecting plate 12 and the lower connecting plate 1 are closed, the guide post 16 can slide within the guide sleeve 17, ensuring that the upper connecting plate 12 can move accurately along the predetermined vertical direction, further guaranteeing the verticality accuracy of the stator 26.

[0040] The guide post 16 can be the MISUMI brand RGSL40-120-FL70 model, and the matching guide sleeve 17 can be selected.

[0041] In this embodiment, as Figure 2 As shown, a guide post fixing bushing 18 is provided between the lower connecting plate 1 and the guide post 16. A guide post clamping block 19 is provided on the guide post fixing bushing 18. Four guide post clamping blocks 19 are evenly distributed along the circumference of the guide post fixing bushing 18. The guide post clamping blocks 19 are fixed to the guide post fixing bushing 18 by bolts. The guide post fixing bushing 18 provides support and fixation for the guide post 16, making its installation more stable and less prone to shaking. The guide post clamping blocks 19 further press the guide post fixing bushing 18 and the guide post 16, enhancing the stability of the entire guide post 16 structure. This prevents the guide post 16 from shifting position due to vibration, external forces, or other factors during use, thus affecting the verticality of the stator 26 and ensuring the reliability and accuracy retention of the welding fixture during long-term use.

[0042] In this embodiment, as Figure 12As shown, a pressure plate 20 is provided on the upper inner wall of the guide post pressure block 19, and an annular plate 21 is provided on the outer wall of the guide post 16. The pressure plate 20 is pressed against the annular plate 21, which enhances the fixing effect on the guide post 16. By pressing the annular plate 21 against the pressure plate 20, the guide post 16 is firmly fixed in the vertical direction, preventing the guide post 16 from moving up and down during use. This ensures the relative position stability of related components such as the upper connecting plate 12 and the lower connecting plate 1, and ultimately ensures that the stator 26 is always in an accurate vertical state during the welding process, which is beneficial to improving the welding quality and the verticality accuracy of the stator 26.

[0043] In this embodiment, as Figure 1 , Figure 8 and Figure 9 As shown, ten lower grooves 22 are provided along the circumference of the outer wall of the lower arc-starting plate 3, and lower arc-starting blocks 23 are provided in the lower grooves 22. Ten upper grooves 24 are provided along the circumference of the outer wall of the upper arc-starting plate 9, and upper arc-starting blocks 25 are provided in the upper grooves 24. The lower arc-starting plate 3 and the lower arc-starting blocks 23, and the upper arc-starting plate 9 and the upper arc-starting blocks 25 are all fixedly connected by bolts, which can provide multiple arc-starting points during welding, making the welding process more uniform and stable.

[0044] In summary, this embodiment utilizes a dual-layer positioning method with internal positioning key 6 and external positioning key 8 to effectively ensure the coaxiality and perpendicularity of each component during multi-layer structure assembly. This ensures that the entire welding fixture is in a stable and precise positioning state during operation, thereby improving the perpendicularity of the stator 26 after welding. Furthermore, by setting guide posts 16 and guide sleeves 17, the upper connecting plate 12 can be accurately moved along the predetermined vertical direction, further guaranteeing the accuracy of the stator 26's perpendicularity.

[0045] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A welding fixture for improving the perpendicularity of a stator, characterized by: The system includes a lower connecting plate (1), a mandrel (2) is disposed at the center of the upper part of the lower connecting plate (1), a lower arc-guiding plate (3) is disposed above the lower connecting plate (1) and sleeved on the outside of the mandrel (2), an inner first positioning keyway (4) is disposed on the outer side wall of the mandrel (2), an inner second positioning keyway (5) is disposed on the inner side wall of the lower arc-guiding plate (3), an inner positioning key (6) is inserted into the inner first positioning keyway (4) and the inner second positioning keyway (5), and an outer insertion key is disposed on the lower connecting plate (1) on the outside of the mandrel (2). The first positioning keyway (7) is provided with an external positioning key (8). An upper arc plate (9) is provided at intervals above the lower arc plate (3). An internal third positioning keyway (27) is provided on the upper arc plate (9) for inserting the internal positioning key (6). An external second positioning keyway (10) and an external third positioning keyway (11) for inserting the external positioning key (8) are provided on the lower arc plate (3) and the upper arc plate (9), respectively. An upper connecting plate (12) is provided above the upper arc plate (9).

2. The welding fixture of claim 1, wherein: The inner positioning key (6) has a convex structure, and the outer positioning key (8) has a rectangular structure.

3. The welding fixture for improving stator perpendicularity according to claim 1, characterized in that: There are six internal positioning keys (6) and six external positioning keys (8). The six internal positioning keys (6) are evenly distributed along the circumference of the spindle (2), and the six external positioning keys (8) are evenly distributed along the circumference of the lower connecting plate (1).

4. The welding fixture for improving stator perpendicularity according to claim 1, characterized in that: A material ejector plate (13) is provided between the lower connecting plate (1) and the lower arc-drawing plate (3). The material ejector plate (13) is provided with an inner fourth positioning keyway (14) for inserting the inner positioning key (6) and an outer fourth positioning keyway (15) for passing through the outer positioning key (8).

5. The welding fixture for improving stator perpendicularity according to claim 1, characterized in that: The center of the lower connecting plate (1) is provided with a guide post (16) inside the spindle (2) and the center of the upper connecting plate (12) is provided with a guide sleeve (17) and the guide post (16) is inserted into the guide sleeve (17).

6. The welding fixture for improving stator perpendicularity according to claim 5, characterized in that: A guide post fixing bushing (18) is provided between the lower connecting plate (1) and the guide post (16), and a guide post pressure block (19) is provided on the guide post fixing bushing (18).

7. A welding fixture for improving stator perpendicularity according to claim 6, characterized in that: A pressure plate (20) is provided on the upper part of the inner wall of the guide post pressure block (19), and a ring plate (21) is provided on the outer wall of the guide post (16). The pressure plate (20) is pressed onto the ring plate (21).

8. The welding fixture for improving stator perpendicularity according to claim 1, characterized in that: The outer wall of the lower arc plate (3) is provided with ten lower grooves (22) along its circumference, and the lower arc blocks (23) are provided in the lower grooves (22).

9. The welding fixture for improving stator perpendicularity according to claim 1, characterized in that: The outer wall of the upper arc plate (9) is provided with ten upper grooves (24) along its circumference, and the upper arc blocks (25) are provided in the upper grooves (24).

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