Stator wire pressing device

Abstract

The utility model belongs to stator production technical field discloses stator wire pressing device, this stator wire pressing device includes base, press seat and drive assembly. Among them, the top recess of base along height direction is connected with first limit slot and avoidance groove, first limit slot is located above avoidance groove, and the bottom wall of first limit slot forms the core lap joint surface, press seat is located above base along height direction, the bottom of press seat recess along height direction has second limit slot, and the wire hole that communicates second limit slot and the top outside of press seat, screw rod is fixed relative to base, first gear is connected with screw rod thread, first gear is connected with press seat rotation and is located above press seat along height direction, and the bottom end of screw rod along axial direction passes through press seat and hangs in the air, and height direction is parallel with the axial direction of screw rod. The universality of this stator wire pressing device is good, and wire pressing stability is good, and wire pressing quality is good, second, the structure of this stator wire pressing device is simple, can effectively reduce production cost and space occupancy.

Description

Technical Field

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

[0002] With the continuous development of electric motors, the types of stators are also increasing, which has greatly increased the demand for stator trial production. The stator includes the stator core and the windings. The windings are formed by winding and connecting multiple wires, and the quality of the wire connection directly affects the working performance of the stator produced in the trial production.

[0003] Currently, one existing stator wire pressing device uses a motor, a driving sprocket, a driven sprocket, and a transmission chain to form a drive unit. As the driven sprocket rotates around its central axis, it drives a screw to rise and fall along the height direction, simultaneously causing a pressure plate fixedly connected to the screw to rise and fall synchronously along the height direction. This allows the pressure plate to descend along the height direction towards the mounting cylinder and apply downward pressure to the stator assembly on the mounting cylinder, thereby pressing the wire onto the stator core. However, this stator wire pressing device is only suitable for stators with a hairpin end formed at the bottom of the axial direction. It is not suitable for stators with hairpin ends formed at both ends of the axial direction during the trial production stage, resulting in poor versatility. Furthermore, the pressing stability and pressing quality of this stator wire pressing device need improvement. Secondly, this stator wire pressing device has a complex structure and a large space occupation. Utility Model Content

[0004] The purpose of this invention is to provide a stator wire pressing device to solve the aforementioned problems existing in the stator wire pressing devices of the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Stator wire clamping device, including:

[0007] The base has a first limiting groove and a clearance groove that are connected and recessed at the top along the height direction. The first limiting groove is located above the clearance groove, and the bottom wall of the first limiting groove forms an iron core lap surface.

[0008] A pressure seat, which is located above the base along the height direction, has a second limiting groove recessed at the bottom along the height direction and a wire passage hole connecting the second limiting groove and the outside of the top of the pressure seat;

[0009] A drive assembly includes a first gear and a screw fixed relative to the base. The first gear is threadedly connected to the screw and rotatably connected to the pressure seat, and is located above the pressure seat along the height direction. The bottom end of the screw passes through the pressure seat along the axial direction and is suspended in the air. The height direction is parallel to the axial direction of the screw.

[0010] As a preferred embodiment of the above-mentioned stator pressing device, the drive assembly further includes an outer sleeve and an inner sleeve. The inner sleeve is sleeved on the screw and fixedly connected to the first gear. The outer sleeve is sleeved on the inner sleeve and is limited between the inner sleeve and the first gear along the axial direction of the screw. The outer sleeve is configured to be able to move up and down synchronously with the first gear only along the axial direction of the screw.

[0011] The drive assembly further includes a second gear, which is rotatably connected to the outer sleeve about its own central axis and meshes with the first gear.

[0012] As a preferred embodiment of the above-mentioned stator pressing device, both the first gear and the second gear are bevel gears, and along the height direction, the second gear is located above the first gear.

[0013] As a preferred embodiment of the above-mentioned stator pressing device, the stator pressing device further includes a frame fixedly connected to the base, the frame having a guide groove extending along the height direction, the outer sleeve having a guide block, and the guide block slidingly engaging with the guide groove.

[0014] As a preferred embodiment of the above-mentioned stator wire pressing device, there are multiple guide blocks and multiple guide grooves, and the multiple guide blocks and multiple guide grooves slide in a one-to-one correspondence.

[0015] As a preferred embodiment of the above-mentioned stator pressing device, the outer sleeve is further provided with a first connecting part, and the drive assembly further includes a first bearing, wherein the second gear is rotatably connected to the first connecting part through the first bearing.

[0016] As a preferred embodiment of the above-mentioned stator pressing device, the second gear is provided with a second connecting part, and the driving assembly further includes a driving member, which is connected to the second connecting part and can drive the second gear to rotate around its own central axis.

[0017] As a preferred embodiment of the above-mentioned stator pressing device, the stator pressing device further includes a second bearing, which is sleeved on the screw, and the first gear is rotatably connected to the pressing base through the second bearing.

[0018] As a preferred embodiment of the above-mentioned stator pressing device, the top of the base along the height direction is further recessed with an avoidance notch, which connects the outer circumferential side of the base with the first limiting groove.

[0019] As a preferred embodiment of the above-mentioned stator pressure device, the number of the clearance notches is multiple, and the multiple clearance notches are distributed at intervals along the circumference of the base.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a stator wire pressing device. When pressing the semi-finished winding product onto the stator core using this device, the stator core is first inserted into the first limiting groove on the base, limiting the setting position of the stator core and supporting it on the core lap surface. It can be understood that at this time, the bottom center area of ​​the stator core is suspended, so that after the wire pressing is completed, the hairpin end of the semi-finished winding product near the base along the height direction can extend out of the bottom of the stator core. Then, the first gear is driven to engage with the screw thread, so that the first gear moves closer to the base along the axial direction of the screw, driving the pressing seat to move closer to the base along the axial direction of the screw. During this process, the semi-finished winding product is inserted into the second limiting groove, and for the end of the semi-finished winding product near the pressing seat along the height direction, the hairpin end of the semi-finished winding product near the pressing seat along the height direction extends to the top of the pressing seat through the wire hole. Then, the pressing seat continues to move closer to the base, so that the pressing seat applies downward pressure evenly to all parts of the top of the semi-finished winding product until the wire pressing is completed. Since the first gear is rotatably connected to the pressure base, if the end of the winding semi-finished product near the pressure base along the height direction has a hairpin end, the hairpin end of the winding semi-finished product near the pressure base along the height direction extends to the top of the pressure base through the wire hole, which can synchronously restrict the pressure base from rotating synchronously with the first gear; if the end of the winding semi-finished product near the pressure base along the height direction does not have a hairpin end, when the pressure base applies downward pressure to the winding semi-finished product, the pressure base will no longer rotate synchronously with the first gear.

[0022] By setting the first limiting groove and the avoidance groove, the setting position of the stator core can be limited, and the bottom center area of ​​the stator core can be suspended, thereby effectively improving the stability and quality of the wire pressing. By setting the second limiting groove, the pressing seat can evenly apply downward pressure to the top of the winding semi-finished product, thereby further improving the stability and quality of the wire pressing.

[0023] Secondly, by setting the wire passage hole, the stator wire pressing device is suitable for pressing the winding semi-finished product with a hairpin end on one end, as well as for pressing the winding semi-finished product with hairpin ends on both ends, which facilitates stator testing and has good versatility.

[0024] Secondly, the drive assembly of this stator pressing device has a simple structure and few parts, which can effectively reduce production costs and space occupancy.

[0025] Therefore, the stator crimping device has good versatility, good crimping stability, and good crimping quality; secondly, the stator crimping device has a simple structure, which can effectively reduce production costs and space occupancy. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the stator wire pressing device provided in a specific embodiment of this utility model;

[0027] Figure 2 This is a cross-sectional view of the base provided in a specific embodiment of this utility model;

[0028] Figure 3 This is a partial structural schematic diagram of the stator wire pressing device provided in a specific embodiment of this utility model;

[0029] Figure 4 This is a partial cross-sectional view of the stator wire pressing device provided in a specific embodiment of this utility model.

[0030] In the picture:

[0031] 1. Base; 11. First limiting groove; 111. Iron core lap surface; 12. Clearance groove; 13. Clearance notch;

[0032] 2. Pressure seat; 21. Second limit groove; 22. Wire passage hole;

[0033] 31. First gear; 311. Limiting surface; 32. Screw; 33. Outer sleeve; 331. Guide block; 332. First connecting part; 34. Inner sleeve; 341. Limiting part; 35. Second gear; 351. Second connecting part; 36. First bearing;

[0034] 4. Frame; 41. Guide groove;

[0035] 5. Second bearing. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This utility model provides a stator wire pressing device, such as... Figure 1-4 As shown, the stator wire pressing device includes a base 1, a pressing seat 2, and a drive assembly. The base 1 has a first limiting groove 11 and a clearance groove 12 recessed at its top along the height direction, with the first limiting groove 11 located above the clearance groove 12. The bottom wall of the first limiting groove 11 forms a core contact surface 111. The pressing seat 2 is located above the base 1 along the height direction. The bottom of the pressing seat 2 has a second limiting groove 21 recessed along the height direction, and a wire-passing hole 22 connecting the second limiting groove 21 and the top of the pressing seat 2 to the outside. The drive assembly includes a first gear 31 and a screw 32 fixed relative to the base 1. The first gear 31 is threadedly connected to the screw 32 and rotatably connected to the pressing seat 2, located above the pressing seat 2 along the height direction. The bottom end of the screw 32 passes through the pressing seat 2 along the axial direction and is suspended, with the height direction parallel to the axial direction of the screw 32.

[0041] Before each conductor is pressed into the stator core by the stator pressing device, each conductor is partially inserted into the stator core to form a semi-finished winding. Along the axial direction of the stator core, one end of the semi-finished winding has a hairpin end, or both ends of the semi-finished winding have hairpin ends. Then, the stator pressing device presses the semi-finished winding into the stator core.

[0042] When the stator winding semi-finished product is pressed onto the stator core using this stator pressing device, the stator core is first inserted into the first limiting groove 11 on the base 1, which limits the setting position of the stator core and supports the stator core on the core lap surface 111. It can be understood that at this time, the bottom center area of ​​the stator core is suspended, so that after the pressing is completed, the hairpin end of the winding semi-finished product near the base 1 along the height direction can extend out of the bottom of the stator core; then the first gear 31 is driven to engage with the screw 32 in a threaded manner, so that the first gear 31... The screw 32 moves closer to the base 1 along the axial direction, causing the pressure seat 2 to move closer to the base 1 along the axial direction of the screw 32. During this process, the winding semi-finished product is inserted into the second limiting groove 21. For the end of the winding semi-finished product that is close to the pressure seat 2 along the height direction, the hairpin end of the winding semi-finished product that is close to the pressure seat 2 along the height direction extends to the top of the pressure seat 2 through the wire hole 22. Then, the pressure seat 2 continues to move closer to the base 1, so that the pressure seat 2 applies downward pressure evenly to all parts of the top of the winding semi-finished product until the wire pressing is completed. Since the first gear 31 is rotatably connected to the pressure base 2, if the end of the winding semi-finished product near the pressure base 2 along the height direction has a hairpin end, after the hairpin end of the winding semi-finished product near the pressure base 2 along the height direction extends to the top of the pressure base 2 through the wire hole 22, it can synchronously restrict the pressure base 2 from rotating synchronously with the first gear 31; if the end of the winding semi-finished product near the pressure base 2 along the height direction does not have a hairpin end, when the pressure base 2 applies downward pressure to the winding semi-finished product, the pressure base 2 will no longer rotate synchronously with the first gear 31.

[0043] The first limiting groove 11 and the clearance groove 12 are provided to limit the setting position of the stator core and to suspend the bottom center area of ​​the stator core, thereby effectively improving the stability and quality of the wire pressing. The second limiting groove 21 is provided to allow the pressing seat 2 to apply downward pressure evenly to the top of the winding semi-finished product, thereby further improving the stability and quality of the wire pressing.

[0044] Secondly, by setting the wire passage hole 22, the stator wire pressing device is suitable for pressing the winding semi-finished product with a hairpin end on one end, as well as for pressing the winding semi-finished product with hairpin ends on both ends, which facilitates stator testing and has good versatility.

[0045] Secondly, the drive assembly of this stator pressing device has a simple structure and few parts, which can effectively reduce production costs and space occupancy.

[0046] Therefore, the stator crimping device has good versatility, good crimping stability, and good crimping quality; secondly, the stator crimping device has a simple structure, which can effectively reduce production costs and space occupancy.

[0047] Specifically, after the pressing is completed, the first gear 31 is driven to engage with the screw 32, so that the first gear 31 moves away from the base 1 along the axial direction of the screw 32, thereby driving the pressing seat 2 to move away from the base 1 along the axial direction of the screw 32, and moving the pressed stator away from the base 1.

[0048] Specifically, the outer diameter of the core lap surface 111 can be adapted to be larger, while the inner diameter of the core lap surface 111 can be smaller. Furthermore, the inner diameter of the second limiting groove 21 is set according to the outer diameter of the core lap surface 111. Furthermore, multiple wire-passing holes 22 are provided, divided into multiple groups, with the groups of wire-passing holes 22 radially spaced along the second limiting groove 21, and each group including multiple wire-passing holes 22 circumferentially spaced along the second limiting groove 21. This allows the stator wire-pressing device to be applicable to pressing stators of different sizes and specifications, thereby further improving the versatility of the stator wire-pressing device.

[0049] It is understandable that, such as Figure 1-4 As shown, the central axis of the first gear 31, the rotation center line of the first gear 31, and the central axis of the screw 32 are all collinear. The central axis of the first gear 31, the rotation center line of the first gear 31, the central axis of the screw 32, and the axial and height directions of the screw 32 are all parallel. Figure 1 In this context, the direction ab represents the height direction.

[0050] Among them, such as Figure 1 , Figure 3 and Figure 4 As shown, the drive assembly also includes an outer sleeve 33 and an inner sleeve 34. The inner sleeve 34 is sleeved on the screw 32 and fixedly connected to the first gear 31. The outer sleeve 33 is sleeved on the inner sleeve 34 and is limited between the inner sleeve 34 and the first gear 31 along the axial direction of the screw 32. The outer sleeve 33 is configured to only be able to move up and down synchronously with the first gear 31 along the axial direction of the screw 32. The drive assembly also includes a second gear 35, which is rotatably connected to the outer sleeve 33 around its own central axis and meshes with the first gear 31.

[0051] By setting the outer sleeve 33 to only move up and down synchronously with the first gear 31 along the axial direction of the screw 32, the second gear 35 can both drive the first gear 31 to engage with the screw 32 and move up and down synchronously with the first gear 31 along the axial direction of the screw 32 during its rotation around its own central axis, so as to adjust the pressure seat 2 to move up and down in the height direction.

[0052] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the axial directions of the outer sleeve 33, the inner sleeve 34, and the screw 32 are all parallel.

[0053] Preferably, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the inner sleeve 34 has a limiting portion 341 at one end axially away from the first gear 31, and the first gear 31 forms a limiting surface 311 at one end axially close to the outer sleeve 33. The outer sleeve 33 is sleeved on the inner sleeve 34 and located between the limiting portion 341 and the limiting surface 311. One end of the outer sleeve 33 abuts against the limiting portion 341, and the other end of the outer sleeve 33 abuts against the limiting surface 311. This achieves the goal of confining the outer sleeve 33 between the inner sleeve 34 and the first gear 31 along the axial direction of the screw 32, and effectively simplifies the structure of the inner sleeve 34.

[0054] In other embodiments, the inner sleeve 34 may be provided with two limiting portions 341 spaced apart along the axial direction, and the outer sleeve 33 may be sleeved on the inner sleeve 34 and located between the two limiting portions 341, with the two ends of the outer sleeve 33 correspondingly abutting against the two limiting portions 341 along the axial direction. This also allows the outer sleeve 33 to be confined between the inner sleeve 34 and the first gear 31 along the axial direction of the screw 32.

[0055] Preferably, in this embodiment, such as Figure 1 , Figure 3 and Figure 4 As shown, both the first gear 31 and the second gear 35 are bevel gears, with the second gear 35 positioned above the first gear 31 along the height direction. This arrangement further reduces the space occupancy of the stator pressing device compared to the fact that both the first gear 31 and the second gear 35 are cylindrical gears.

[0056] In other embodiments, both the first gear 31 and the second gear 35 are cylindrical gears, with the second gear 35 located on the outer periphery of the first gear 31. This also enables the first gear 31 to engage with the screw 32 via a threaded connection.

[0057] In this embodiment, the transmission ratio of the first gear 31 and the second gear 35 is exemplarily set to 2. This amplifies the driving force applied to the first gear 31, thereby effectively improving the wire pressing efficiency. In other embodiments, the transmission ratio of the first gear 31 and the second gear 35 may also be set to 3, etc.

[0058] Among them, such as Figure 1 , Figure 3 and Figure 4 As shown, the stator wire pressing device also includes a frame 4 fixedly connected to the base 1. The frame 4 is provided with a guide groove 41 extending along the height direction, and the outer sleeve 33 is provided with a guide block 331, which slides in conjunction with the guide groove 41. This arrangement ensures that the outer sleeve 33 can only move up and down synchronously with the first gear 31 along the axial direction of the screw 32.

[0059] Optionally, there are multiple guide blocks 331 and guide grooves 41, with each guide block 331 and guide groove 41 slidingly engaging in a one-to-one correspondence. This further improves the reliability and stability of the second gear 35 moving synchronously with the first gear 31 only along the axial direction of the screw 32, thereby effectively improving the meshing stability and reliability of the first gear 31 and the second gear 35, and also further extending the service life of the first gear 31 and the second gear 35. In this embodiment, as... Figure 1 , Figure 3 and Figure 4 As shown, the exemplary configuration includes two guide blocks 331 and two guide grooves 41, with the two guide blocks 331 and the two guide grooves 41 slidingly engaging in a one-to-one correspondence, and the two guide blocks 331 being located on both sides of the outer sleeve 33 along the radial direction.

[0060] Among them, such as Figure 3 and Figure 4 As shown, the outer sleeve 33 is provided with a first connecting part 332, and the drive assembly also includes a first bearing 36. The second gear 35 is rotatably connected to the first connecting part 332 through the first bearing 36. This enables the second gear 35 to be rotatably connected to the outer sleeve 33, allowing the second gear 35 to rotate stably and smoothly around its own central axis, thereby further improving the meshing stability of the second gear 35 and the first gear 31.

[0061] Specifically, in this embodiment, the first bearing 36 is a cylindrical roller bearing. The inner ring of the first bearing 36 is fixedly sleeved on the first connecting portion 332, and the second gear 35 is fixedly sleeved on the outer ring of the first bearing 36.

[0062] Specifically, in this embodiment, the first connecting part 332 is welded to the outer periphery of the outer sleeve 33, and the guide block 331 is welded to the outer periphery of the outer sleeve 33. In other embodiments, the first connecting part 332 and the guide block 331 may also be fixed to the outer periphery of the outer sleeve 33 by integral molding or screw connection.

[0063] Among them, such as Figure 1 , Figure 3 and Figure 4 As shown, the second gear 35 is provided with a second connecting part 351, and the drive assembly also includes a drive member. The drive member is connected to the second connecting part 351 and can drive the second gear 35 to rotate around its own central axis.

[0064] In this embodiment, as Figure 1 , Figure 3 and Figure 4 As shown, the second connecting part 351 is a hexagonal nut, and the driving component is an electric wrench. The output end of the electric wrench is inserted into the hexagonal nut. This enables the second gear 35 to rotate around its own central axis and mesh with the first gear 31.

[0065] In other embodiments, the second connecting part 351 may be a square-headed nut, and the driving component may be an electric wrench, with the output end of the electric wrench engaging with the square-headed nut. This can also drive the second gear 35 to rotate around its own central axis and mesh with the first gear 31.

[0066] In other embodiments, the driving component may also be a manual wrench.

[0067] Among them, such as Figure 1 and Figure 4 As shown, the stator pressing device also includes a second bearing 5, which is sleeved on the outer periphery of the screw 32. The first gear 31 is rotatably connected to the pressing base 2 through the second bearing 5. This enables the first gear 31 to be rotatably connected to the pressing base 2.

[0068] Specifically, in this embodiment, the second bearing 5 is a planar thrust bearing. One of the fixed disc and the movable disc of the second bearing 5 is fixedly connected to the first gear 31, and the other is fixedly connected to the pressure seat 2.

[0069] In other embodiments, an annular groove can be provided on one end face of the first gear 31 and the pressure seat 2, and a slider can be provided on the other end face. The annular groove axially confines the slider within the annular groove and slides within it. This also enables a rotatable connection between the first gear 31 and the pressure seat 2. Furthermore, the slider can be an annular slider, or the slider can include multiple sub-sliders spaced circumferentially along the annular groove. All of these improvements enhance the reliability and stability of the rotatable connection between the first gear 31 and the pressure seat 2.

[0070] Optionally, such as Figure 1 and Figure 2 As shown, the top of the base 1 along the height direction is also recessed with an avoidance notch 13, which connects the outer circumferential side of the base 1 and the first limiting groove 11. This facilitates the transport and insertion of the stator core into the first limiting groove 11, and also facilitates the removal of the stator core from the base 1.

[0071] Further optional, such as Figure 1 and Figure 2 As shown, the clearance notch 13 also connects the outer circumferential side of the base 1 and the clearance groove 12. This further facilitates the transport and insertion of the stator core into the first limiting groove 11, and the removal of the stator core from the base 1; secondly, it can improve the lightweight effect of the base 1.

[0072] Optionally, the number of clearance notches 13 is multiple, and the multiple clearance notches 13 are distributed at intervals along the circumference of the base 1. In this embodiment, as... Figure 1 and Figure 2 As shown, the exemplary configuration has two clearance gaps 13.

[0073] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A stator wire pressing device, characterized in that, include: The base (1) has a first limiting groove (11) and a relief groove (12) that are connected and recessed at the top along the height direction. The first limiting groove (11) is located above the relief groove (12), and the bottom wall of the first limiting groove (11) forms an iron core lap surface (111). Pressure seat (2), the pressure seat (2) is located above the base (1) along the height direction, the bottom of the pressure seat (2) along the height direction is provided with a second limiting groove (21), and a wire hole (22) connecting the second limiting groove (21) and the top outside of the pressure seat (2); The drive assembly includes a first gear (31) and a screw (32) fixed relative to the base (1). The first gear (31) is threadedly connected to the screw (32). The first gear (31) is rotatably connected to the pressure seat (2) and is located above the pressure seat (2) along the height direction. The bottom end of the screw (32) passes through the pressure seat (2) and is suspended in the air. The height direction is parallel to the axial direction of the screw (32).

2. The stator wire pressing device according to claim 1, characterized in that, The drive assembly further includes an outer sleeve (33) and an inner sleeve (34). The inner sleeve (34) is sleeved on the screw (32) and fixedly connected to the first gear (31). The outer sleeve (33) is sleeved on the inner sleeve (34) and is limited between the inner sleeve (34) and the first gear (31) along the axial direction of the screw (32). The outer sleeve (33) is configured to move up and down synchronously with the first gear (31) only along the axial direction of the screw (32). The drive assembly further includes a second gear (35), which is rotatably connected to the outer sleeve (33) about its own central axis and meshes with the first gear (31).

3. The stator wire pressing device according to claim 2, characterized in that, Both the first gear (31) and the second gear (35) are bevel gears, and along the height direction, the second gear (35) is located above the first gear (31).

4. The stator wire pressing device according to claim 2, characterized in that, The stator pressing device also includes a frame (4) fixedly connected to the base (1). The frame (4) is provided with a guide groove (41) extending along the height direction. The outer sleeve (33) is provided with a guide block (331). The guide block (331) is slidably engaged with the guide groove (41).

5. The stator wire pressing device according to claim 4, characterized in that, The number of guide blocks (331) and guide grooves (41) are both multiple, and the multiple guide blocks (331) and multiple guide grooves (41) slide in a one-to-one correspondence.

6. The stator wire pressing device according to claim 2, characterized in that, The outer sleeve (33) is also provided with a first connecting part (332), and the drive assembly further includes a first bearing (36), and the second gear (35) is rotatably connected to the first connecting part (332) through the first bearing (36).

7. The stator wire pressing device according to claim 2, characterized in that, The second gear (35) is provided with a second connecting part (351), and the driving assembly further includes a driving member, which is connected to the second connecting part (351) and can drive the second gear (35) to rotate around its own central axis.

8. The stator wire pressing device according to any one of claims 1-7, characterized in that, The stator pressing device further includes a second bearing (5), which is sleeved on the screw (32), and the first gear (31) is rotatably connected to the pressing base (2) through the second bearing (5).

9. The stator wire pressing device according to any one of claims 1-7, characterized in that, The base (1) is also recessed at the top along the height direction with a clearance notch (13), which connects the outer circumferential side of the base (1) with the first limiting groove (11).

10. The stator wire pressing device according to claim 9, characterized in that, The number of the clearance gaps (13) is multiple, and the multiple clearance gaps (13) are distributed at intervals along the circumference of the base (1).

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