Stator core press-fitting device

Abstract

The utility model discloses a stator iron core press-fitting device. The technical key points are that the device comprises a base, a limiting sleeve is arranged on the base, a pressing block used for pressing a stator punching sheet is arranged above the limiting sleeve, the pressing block is in sliding connection with the limiting sleeve, a driving mechanism used for driving the pressing block to press downwards is arranged on the pressing block, and a positioning rod is further in sliding connection with the base. And the positioning rod is used for being matched with a tooth groove of the inner circle of the stator punching sheet. The stator punching sheet pressing device has the advantages that the inner circle and the outer circle of the stator punching sheet are limited through the limiting sleeve and the positioning rod respectively, the stator punching sheet is prevented from displacing and deflecting in the pressing process, and therefore it is guaranteed that a stator iron core has higher quality after being laminated; and the pressure applying groove is directly covered on the stator punching sheet, so that the pressure can be transmitted more uniformly, and the stator punching sheet can be protected to a certain extent and prevented from being crushed by the output end of the hydraulic cylinder.

Description

A stator core pressing device Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a stator core pressing device. Background Technology

[0002] The stator core is one of the core components of the stator section in a rotating electric machine. It is an important part of the motor's magnetic circuit and supports the stator windings.

[0003] Stator cores are generally pressed into the stator housing by press fitting. The press fitting process of stator cores is also called stacking or pressing, which is a key process in motor stator manufacturing. Its core objective is to accurately, tightly and firmly stack a large number of stamped stator laminations into an integral cylindrical core according to design requirements, and to ensure its dimensional accuracy, tightness and mechanical strength.

[0004] Since the stator core cannot be machined on its outer diameter after press-fitting, the press-fitting device in the prior art usually sets a groove on the machine tool for placing the stator laminations, and then uses a pressure cylinder to press the stator laminations into shape. However, the groove can only limit the bottom outer edge, while the inner diameter and upper end of the stator laminations are still in a state of free movement, which may cause displacement or deflection during the stacking process, thus affecting the final stacking effect. Summary of the Invention

[0005] In order to solve the above problems, this utility model provides a stator core pressing device.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a stator core pressing device, including a base, a limiting sleeve provided on the base, a pressing block for pressing stator laminations provided above the limiting sleeve, the pressing block being slidably connected to the limiting sleeve, a driving mechanism for driving the pressing block to press down connected to the pressing block, and a positioning rod slidably connected to the base, the positioning rod being used to cooperate with the toothed grooves of the inner circle of the stator laminations.

[0007] By adopting the above scheme, the inner and outer circles of the stator laminations are limited by the limiting sleeve and positioning rod, preventing the stator laminations from tilting during the pressing process. This ensures that the pressed stator core has higher quality. The entire pressing block can apply uniform pressure to the stator core, preventing unbalanced pressure and ensuring the quality of the pressed stator core. The movable positioning rod can meet the limiting work of stator cores with different inner diameters, improving the flexibility of the device.

[0008] Furthermore: the middle part of the clamping block is recessed downward to form a pressure groove, and a height limiting block is provided at the bottom of the clamping block.

[0009] By adopting the above scheme, the pressure groove can abut against the base during clamping, thereby preventing the clamping work from continuing and achieving the preset clamping degree. In actual use, the clamping blocks with different height limit blocks can be replaced according to the actual height required by the stator core, thereby achieving the final height adjustment, making the equipment able to produce a wider range of product specifications and making adjustments more convenient.

[0010] Furthermore: a through-hole is formed on the base, the positioning rod is located in the moving groove, and a spring is also abutted between the positioning rod and the groove wall of the moving groove, and a push block matching the shape of the positioning rod is provided at the end of the spring.

[0011] By adopting the above scheme, the spring can apply an outward pushing force to the positioning rod at all times, and the upper limit sleeve restricts the stator lamination, thereby achieving the effect of clamping the stator lamination between the upper limit sleeve and the positioning rod. This makes the stator core more stable when pressed and less prone to displacement. Even if displacement occurs, the spring can correct the position in time. The push block can apply a more uniform force to the positioning rod, ensuring that the positioning rod can be pushed by the spring.

[0012] Furthermore: a support rod is slidably connected to the base, a stabilizing seat corresponding to the position of the moving groove is provided on the support rod, a tension spring is provided between the stabilizing seat and the bottom surface of the base, and the bottom of the positioning rod is placed inside the stabilizing seat.

[0013] By adopting the above scheme, the tension spring can be stretched due to the action of the positioning rod when the clamping block is pressed down. After the stacking is completed, the positioning rod will be reset. Furthermore, since the positioning rod will be positioned at two points between the stabilizing seat and the push block, the tilt of the top of the positioning rod is also restricted, thus strengthening the limiting effect of the positioning rod on the top stator lamination.

[0014] Furthermore, the bottom outer edge of the pressure groove is formed with a protruding tooth that matches the tooth groove of the inner circle of the stator lamination, and the top of the positioning rod is provided with a connecting groove for connecting with the protruding tooth.

[0015] By adopting the above scheme, the protruding teeth can engage the inner circle of the stator lamination at the upper end and connect with the positioning rod to limit the upper end of the positioning rod, thereby preventing the positioning rod from tilting. This allows the positioning rod to effectively position the entire inner circle of the stator lamination, preventing the stator lamination from deflecting during the pressing process and ensuring the final product quality.

[0016] Furthermore: the limiting sleeve is formed by multiple limiting plates, a through groove is formed between two adjacent limiting plates, the outer edge of the pressing block is folded down to form a edging and covers the upper end of the limiting plate, and the top of the pressing block is provided with a sliding groove for sliding connection with the limiting plate.

[0017] By adopting the above scheme: after the outer edge of the positioning block surrounds the limiting sleeve, the limiting sleeve itself will not expand outward, thus ensuring its limiting function on the stator lamination. Due to the existence of the sliding groove, the limiting sleeve can gradually slide out from above the pressing block when the pressing block is pressed down, without affecting the pressing process. At the same time, the pressing part of the pressing block does not need to make way for the limiting sleeve, thus ensuring that the stator lamination will not be displaced during the pressing process.

[0018] Furthermore, the base is provided with a slot for engaging with the bottom of the limiting plate.

[0019] By adopting the above solution, the card slot can pre-fix the bottom of the limiting plate, so that the limiting sleeve can be placed on the base more firmly and easily.

[0020] Furthermore, the driving mechanism includes a hydraulic cylinder disposed above the clamping block.

[0021] By adopting the above scheme, the hydraulic cylinder has a large pressure, and the output end of the hydraulic cylinder matches the recess of the pressure groove, so that the hydraulic cylinder can fully transmit the pressure to the clamping block, and then the clamping block will press the stator lamination.

[0022] In summary, this utility model has the following beneficial effects:

[0023] The inner and outer circles of the stator laminations are limited by the limiting sleeve and the positioning rod to prevent displacement and deflection of the stator laminations during the pressing process, thereby ensuring higher quality of the stator core after stacking. Since the pressing process uses the pressure transmitted by the pressure groove, and the pressure groove is located directly covering the stator laminations, this not only makes the pressure transmission more uniform, but also provides a certain degree of protection for the stator laminations, preventing them from being crushed by the output end of the hydraulic cylinder. Attached Figure Description

[0024] Figure 1 is a structural schematic diagram of this utility model.

[0025] Figure 2 is an exploded view of this utility model.

[0026] Figure 3 is a schematic diagram of the base structure in the utility model.

[0027] Figure 4 is a schematic diagram of the structure of the clamping block in the utility model.

[0028] Figure 5 is a schematic diagram of the structure of the clamping block in the utility model.

[0029] Figure 6 is a schematic diagram of the positioning rod in the utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Base; 11. Moving groove; 12. Spring; 13. Push block; 14. Support rod; 15. Stabilizing seat; 16. Tension spring; 17. Slot; 2. Limiting sleeve; 21. Limiting plate; 22. Through groove; 3. Pressing block; 31. Pressing groove; 32. Height limiting block; 33. Raised tooth; 34. Edge binding; 35. Sliding groove; 4. Drive mechanism; 5. Positioning rod; 51. Connecting groove. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] As shown in Figures 1-2 and 4-5, a stator core pressing device includes a base 1, a limiting sleeve 2 on the base 1, and a pressing block 3 for pressing stator laminations above the limiting sleeve 2. A driving mechanism 4 for pressing the pressing block 3 downwards is connected to the pressing block 3. The driving mechanism 4 includes a hydraulic cylinder positioned above the pressing block 3. The stator laminations are placed inside the limiting sleeve 2, which can limit the outer edge of the stator laminations from the outside, thus preventing displacement of the stator laminations during pressing and ensuring the final stacking quality. The pressing block 3 is the main structure for applying pressure. Using the pressing block 3 for pressure transmission instead of direct pressing by the hydraulic cylinder ensures that the pressure is evenly distributed on the pressing block 3 and then distributed to the stator laminations, thereby ensuring... The final stator core has a uniform clamping effect, and it also prevents direct contact between the stator laminations and the hydraulic cylinder, thus protecting the stator laminations to a certain extent. The middle of the clamping block 3 is recessed to form a pressure groove 31, and a height limiting block 32 is set at the bottom of the clamping block 3. The output shaft of the hydraulic cylinder is located in the pressure groove 31, and pressure is applied to the clamping block 3 through the pressure groove 31, which is then transmitted to the stator laminations. The height limiting block 32 can stop the clamping work by pressing against the base 1 when the clamping degree reaches the preset index. In actual use, the clamping block 3 with different height limiting blocks 32 can be replaced to adapt the equipment to the needs of stator cores of different sizes, thereby improving the applicability of the equipment.

[0034] As shown in Figures 2 to 6, a positioning rod 5 is slidably connected to the base 1. The positioning rod 5 is used to engage with the toothed groove on the inner circle of the stator lamination. The engagement of the positioning rod 5 with the toothed groove on the inner circle of the stator lamination limits the inner circle of the stator lamination, preventing the stator lamination from deflecting during the pressing process and ensuring the final quality of the stator core. Since the toothed groove is an inherent structure of the stator lamination itself, no special modifications are needed to directly engage it, avoiding any unnecessary design that might affect product use. The bottom outer edge of the pressure groove 31 forms a... The convex teeth 33 match the grooves on the inner circle of the stator lamination. The convex teeth 33 can be the same as the positioning rod 5. Since the positioning rod 5 is set on the base 1, it can only effectively limit the bottom of the stacked stator laminations. The convex teeth 33 compensate for the limitation on the upper end of the stator laminations. The top of the positioning rod 5 is provided with a connecting groove 51, which is used to connect with the convex teeth 33. When the convex teeth 33 are connected to the positioning rod 5, the clamping block 3 and the base 1 form a whole that slides along the positioning rod 5, so that the middle of the stator lamination can also be limited, thereby further ensuring the quality of the stator core.

[0035] As shown in Figure 3, a through movable groove 11 is provided on the base 1. The positioning rod 5 is located in the movable groove 11. A spring 12 is also abutted between the positioning rod 5 and the groove wall of the movable groove 11. The spring 12 allows the positioning block to move within the movable groove 11, thereby adjusting the distance between it and the center of the base 1. This adapts to stator laminations with different inner diameters, further expanding the applicability of the equipment. Furthermore, the spring 12 can push the positioning rod 5 when the stator laminations are displaced, thus pushing the stator laminations and promptly correcting their position. A push block 13, matching the shape of the positioning rod 5, is provided at the end of the spring 12. The push block 13 can... To make the movement of the positioning rod 5 smoother, a support rod 14 is slidably connected to the base 1. A stabilizing seat 15 corresponding to the position of the moving groove 11 is provided on the support rod 14. A tension spring 16 is provided between the stabilizing seat 15 and the bottom surface of the base 1. The bottom of the positioning rod 5 is placed in the stabilizing seat 15. The stabilizing seat 15 and the moving groove 11 can perform two-point positioning of the bottom of the positioning rod 5, thereby limiting the tilt of the upper end of the positioning rod 5 to a certain extent and ensuring that the positioning rod 5 has a good limiting effect on the stator lamination. The tension spring 16 will reset the positioning rod 5 after the stacking is completed, and can also correct the bottom position of the positioning rod during the pressing process.

[0036] As shown in Figure 4, the base 1 is provided with a slot 17 for engaging with the bottom of the limiting plate 21. The clamping block 3 is slidably connected to the limiting sleeve 2. The limiting sleeve 2 has a through slot 22, which divides the limiting sleeve 2 into multiple limiting plates. The outer edge of the clamping block 3 is folded down to form a rim 34, which covers the upper end of the limiting plate. After the rim 34 covers the limiting plate, a part of the limiting sleeve 2 actually enters the clamping block 3, thereby restraining the outward expansion trend of the limiting sleeve 2 and ensuring that the limiting sleeve 2 has sufficient limiting effect on the outer circle of the stator lamination. The top of the clamping block 3 is provided with a sliding groove 35 for sliding connection with the limiting plate. The sliding groove 35 engages with the through slot 22, so that during the pressing process of the clamping block 3, the limiting sleeve 2 will gradually protrude from the top of the clamping block 3 as the pressing progresses, thereby avoiding the influence of the limiting sleeve 2 on the pressing work.

[0037] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A stator core pressing device, comprising a base (1), characterized in that: A limiting sleeve (2) is provided on the base (1), and a pressing block (3) for pressing the stator lamination is provided above the limiting sleeve (2). The pressing block (3) is slidably connected to the limiting sleeve (2). A driving mechanism (4) for driving the pressing block (3) to press down is connected to the pressing block (3). A positioning rod (5) is also slidably connected to the base (1). The positioning rod (5) is used to cooperate with the tooth groove of the inner circle of the stator lamination.

2. A stator core press fitting device according to claim 1, characterized by: The middle part of the clamping block (3) is recessed downward to form a pressure groove (31), and a height limiting block (32) is provided at the bottom of the clamping block (3).

3. A stator core press fitting device according to claim 2, characterized by: The base (1) has a through moving groove (11), the positioning rod (5) is located in the moving groove (11), and the positioning rod (5) and the groove wall of the moving groove (11) are also in contact with a spring (12), and the end of the spring (12) is provided with a push block (13) that matches the shape of the positioning rod (5).

4. The stator core pressing device as described in claim 3, characterized in that: A support rod (14) is slidably connected to the base (1). A stabilizing seat (15) corresponding to the position of the moving groove (11) is provided on the support rod (14). A tension spring (16) is provided between the stabilizing seat (15) and the bottom surface of the base (1). The bottom of the positioning rod (5) is placed inside the stabilizing seat (15).

5. A stator core press fitting device according to claim 3, characterized by: The bottom outer edge of the pressure groove (31) is formed with a protruding tooth (33) that matches the tooth groove of the inner circle of the stator lamination. The top of the positioning rod (5) is provided with a connecting groove (51), which is used to connect with the protruding tooth (33).

6. The stator core pressing device as described in claim 1, characterized in that: The limiting sleeve (2) is formed by multiple limiting plates (21), and a through groove (22) is formed between two adjacent limiting plates (21). The outer edge of the pressing block (3) is folded down to form a edging (34) and covers the upper end of the limiting plate (21). The top of the pressing block (3) is provided with a sliding groove (35) for sliding connection with the limiting plate (21).

7. A stator core press fitting device according to claim 6, characterized by: The base (1) is provided with a slot (17) for engaging with the bottom of the limiting plate (21).

8. A stator core press fitting device according to claim 1, characterized by: The drive mechanism (4) includes a hydraulic cylinder disposed above the clamping block (3).

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