Rotor core stacking device for electric vehicle drive motor

Abstract

The application discloses a rotor core stacking device of an electric vehicle driving motor, relates to the technical field of stacking production of a rotor body, and comprises an integrally-formed core shaft body and a core shaft cone body, the conical surface of the core shaft cone body can guide the rotor punching sheet falling from above, and the rotor punching sheet is easily sleeved on the outer ring of the core shaft body by using gravity. The scheme can effectively solve the jamming problem of the rotor punching sheet caused by alignment deviation during stacking, automatic deviation correction and continuous and stable discharging are realized through the synergistic effect of the inclined surface guiding structure and the vibrating piece. In the scheme, the vibration source is designed by using negative pressure pneumatic, the amplitudes of all regions of the vibrating piece can be balanced, the operation reliability of the device is improved, the stacking efficiency of the rotor core is significantly improved, the equipment failure rate and the manual intervention frequency are reduced, and the high-speed automatic production demand is met. The scheme also designs a positioning column, which can effectively limit the initial falling position of the rotor punching sheet, and further improve the stacking precision.

Description

Technical Field

[0001] This invention relates to the field of rotor body stacking production technology, specifically to a rotor core stacking device for electric vehicle drive motors. Background Technology

[0002] The rotor core stacking device is a specialized piece of equipment used in electric vehicle motor manufacturing to precisely stack rotor laminations (mostly silicon steel sheets) into a complete core. Its core function is to ensure the stacking accuracy, density, and structural strength of the core, laying the foundation for subsequent motor assembly.

[0003] Chinese utility model patent CN218335668U, entitled "A Stator and Rotor Core Stacking Device," discloses a device comprising a support frame, an operating panel, a hydraulic column, and a fixing assembly. The fixing assembly includes a push spring, a limiting plate, an elastic element, a fixing strip, and a pressing rod. The push spring is disposed within the operating cavity, with both ends fixedly connected to the operating panel and the limiting plate, respectively. One end of the elastic element is fixedly connected to the limiting plate, and the fixing strip is fixedly connected to the other end of the elastic element. The pressing rod is slidably connected to the operating panel. By pressing the pressing rod, the fixing strip is pushed out of the slot. Under the rebound force of the push spring, the limiting plate pushes the stacked stator and rotor cores out of the operating cavity, thus facilitating the removal of the stacked rotor cores and improving processing efficiency.

[0004] The aforementioned utility model patent improves upon existing technology from the perspective of efficiently removing the stacked iron core, but existing technology still suffers from the technical problem of poor automation in rotor stacking production process.

[0005] In existing technologies, when producing motor rotor cores using automated production lines, the stamped rotor laminations are conveyed along a conveyor belt. A base and mandrel are installed below the end of the conveyor belt, allowing the rotor laminations to fall directly onto the mandrel. To prevent the rotor laminations from falling vertically, a mechanism that provides a throwing force to the rotor laminations can be added at the end of the conveyor belt, which will not be elaborated here. However, the following problems exist: The existing technology reduces the error tolerance by decreasing the diameter of the mandrel, resulting in poor uniformity among the stacked rotor laminations. After stacking, they cannot be directly pressed, reducing rotor core production efficiency and automation. Therefore, there is an urgent need in this field for a rotor core pressing device for electric vehicle drive motors to solve the problems existing in the existing technology. Summary of the Invention

[0006] The purpose of this invention is to provide a technical solution for a rotor core stacking device for electric vehicle drive motors, so as to solve the technical problem of low automation in core stacking in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A rotor core stacking device for an electric vehicle drive motor includes a base and a mandrel mounted on the base. Rotor laminations are stacked on the mandrel. The device also includes a pressing component capable of applying downward pressure to the stacked rotor laminations. The mandrel comprises an integrally formed mandrel body and a mandrel cone. The conical surface of the mandrel cone guides rotor laminations falling from above, allowing the laminations to be effectively and efficiently fitted onto the outer ring of the mandrel body using gravity. At least eight movable slots are arranged in a circular array on the sidewall of the mandrel. Several springs are vertically and equidistantly fixed on the sidewall of each movable slot near the axis of the mandrel body. The free ends of the springs are all fixed to the same vibrating plate. Without external force, the vibrating plate is located inside the movable slot, with the side of the vibrating plate away from the axis of the mandrel body protruding from the sidewall of the mandrel. The vibrating plate is driven by a vibration generating component.

[0008] As a preferred embodiment, limit grooves are respectively formed on the opposite side walls of the top of the movable groove, and a limit rod is fixedly installed on the side wall of the top of the vibrating plate near the limit groove. The limit rod is movably embedded in the limit groove, and the limit groove plays a limiting and guiding role for the limit rod, preventing the top of the vibrating plate from having too large an amplitude during vibration, and avoiding obstruction of the falling rotor laminations.

[0009] As a preferred embodiment, the top of the vibrating plate and the end away from the axis of the spindle body are provided with rounded corners to prevent the vibrating plate from rubbing against the rotor laminations during vibration, which would cause scratches or jamming on the surface of the rotor laminations. The rounded corner design allows the top of the vibrating plate to smoothly transition with the contact area of ​​the rotor laminations, effectively reducing frictional resistance and further ensuring that the rotor laminations slide off smoothly.

[0010] As a preferred embodiment, both the limiting groove and the limiting rod are cylindrical structures, and the two are fitted with a clearance to ensure that the limiting rod slides smoothly within the limiting groove.

[0011] As a preferred embodiment, a positioning column is horizontally slidably mounted on the base. The positioning column can slide back and forth on the base in a horizontal direction. The positioning column includes an integrally formed positioning column body and a guide area. The horizontal cross-sectional shape of the positioning column body matches the contour of the area of ​​the slot near the axis of the mandrel body, allowing for a tight fit. A transmission rod is fixedly connected to one end of the positioning column body away from the axis of the mandrel body. The other end of the transmission rod away from the positioning column body is connected to an external linear drive device, which can drive the positioning column to move back and forth along a horizontal line intersecting the axis of the mandrel body. When the positioning column moves towards the axis of the mandrel body, the positioning column body can push the vertical slot to align, forming the basic shape of the rotor. Then, it can directly enter the next stacking process of rotor production without manual intervention to adjust the neatness between the stacked rotor laminations, greatly improving the efficiency of rotor core stacking and reducing the labor intensity of operators. The guide area, as the upper extension of the positioning post, has a smaller side wall area on the side closer to the main axis of the mandrel than on the side farther from the main axis of the mandrel. The top surface area of ​​the guide area is smaller than the bottom horizontal cross-sectional area of ​​the guide area. This allows the falling rotor laminations to be guided and corrected when they contact the guide area, ensuring that the slots are automatically aligned to the correct position during the fall. This facilitates the horizontal movement of the positioning post and the alignment of the rotor laminations, reducing the risk of stacking failure due to initial position deviation.

[0012] As a preferred embodiment, the top of the guide area near the main axis of the mandrel body is provided with an inclined guide surface. The inclined guide surface extends from bottom to top away from the main axis of the mandrel body, reducing the top surface area of ​​the mandrel, thereby more effectively guiding the rotor laminations to fall accurately into the predetermined stacking area.

[0013] As a preferred embodiment, several inclined shims are vertically and equidistantly fixed on the side wall of the movable groove near the axis of the mandrel body. Viewed from above, the side wall of the inclined shims away from the axis of the mandrel body is a clockwise inclined surface extending towards the axis of the mandrel body. The end of the spring near the axis of the mandrel body is perpendicularly fixed to the inclined surface. A telescopic sleeve is fitted around the outside of the spring, with one end fixed to the inclined surface and the other end fixed to a vibrating plate. The telescopic sleeve restricts the spring's oscillation, ensuring that the spring can only deform in its own compression or relaxation direction, thus maintaining axial stability when under force. The side wall of the vibrating plate away from the axis of the mandrel body is a correction inclined surface, which, viewed from above, is a clockwise inclined surface extending towards the axis of the mandrel body. This design causes a shift in the vibration direction of the vibrating plate, allowing vibration energy to be transmitted perpendicular to the inclined surface. Using the above technical solution, when the rotor laminations fall, if a low-probability event occurs: the rotor lamination area between adjacent slots happens to come into contact with the inclined guide surface, causing the rotor laminations to be obstructed and unable to fall quickly, the correction slope can use the vibration force perpendicular to the slope to apply rotational guiding force to the rotor laminations, causing the guide area to be stuck into the slot, reducing the fault tolerance rate of continuous stacking of rotor laminations.

[0014] As a preferred embodiment, the base has a mounting groove in the center, the bottom of the mandrel body is located in the mounting groove, and the bottom end of the side wall of the mandrel body is fixedly connected to the side wall of the mounting groove by a stabilizing ring.

[0015] As a preferred embodiment, the vibration generating component includes a main air groove vertically formed in the center of the bottom surface of the spindle body. A vent is formed between the main air groove and the movable groove. A negative pressure pump is connected to the bottom of the main air groove. The negative pressure pump draws negative pressure, causing the vibrating plate to contract into the movable groove. Air is supplied into the main air groove from the gap between the vibrating plate and the movable groove. Since the spring itself cannot maintain stability, when there is no absolutely strong and stable external force to compress the spring, the spring is prone to a fluctuating state, so that the vibrating plate can be vibrated under force. As a preferred solution, the use of an intermittent start-stop negative pressure pump can enhance the amplitude of the vibrating plate, thereby further improving the vibration transmission efficiency. This causes the rotor laminations to be subjected to periodic disturbances during the falling process, effectively avoiding jamming. The intermittent start-stop control is achieved through a PLC timing module.

[0016] As a preferred embodiment, the vibration generating component includes a vibrating plate and a vibration motor. The vibration motor is installed in the mounting groove and drives the vibrating plate. The vibrating plate extends downward and protrudes from the bottom surface of the spindle body. The bottom end of the vibrating plate is fixedly connected to the vibrating plate. After the vibration motor is started, it drives the vibrating plate to vibrate, thereby transmitting the vibration to the vibrating plate. The vibrating plate vibrates under the influence of its own sheet-like structure.

[0017] As a preferred embodiment, the pressure-applying component has a slot that avoids the mandrel and the positioning post, ensuring that it does not interfere with the mandrel and the positioning post during the pressure application process.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This solution can effectively solve the jamming problem caused by misalignment during the stacking of rotor laminations. Through the synergistic effect of the inclined guide structure and the vibrating plate, automatic correction and continuous stable feeding are achieved. 2. In this scheme, the vibration source adopts a negative pressure pneumatic design, which can balance the amplitude of each area of ​​the vibrating plate, improve the reliability of the device operation, significantly improve the stacking efficiency of the rotor core, reduce the equipment failure rate and the frequency of manual intervention, and meet the needs of high-speed automated production.

[0019] 3. In this solution, during the rotor's descent, a rotational guiding force can be provided to the rotor laminations, enabling them to automatically adjust their posture and correct their deflection angle during slight vibrations. This ensures precise alignment between the slot opening and the guiding area, guaranteeing the rapid descent of the rotor laminations without obstructing the rotor laminations that continue to fall from above.

[0020] 4. In this solution, a positioning post is designed. The positioning post can effectively limit the initial falling position of the rotor laminations, avoid positional deviation caused by free fall, and further improve the stacking accuracy. At the same time, it can use its own horizontal drive to push the positioning post to further align the vertical slots after the rotor laminations are stacked, and can also play a clamping role to keep the aligned slots in a stable alignment state, preventing misalignment caused by vibration or external force during subsequent processing. Attached Figure Description

[0021] Figure 1 This is a left oblique view of the overall structure of the rotor core stacking device for the electric vehicle drive motor of the present invention. Figure 2 This is a right oblique view of the overall structure of the rotor core stacking device for the electric vehicle drive motor of the present invention. Figure 3 This is a front view of the rotor core stacking device for the electric vehicle drive motor of the present invention; Figure 4 This is a disassembled schematic diagram of the spindle structure of the rotor core stacking device for the electric vehicle drive motor of the present invention. Figure 5 for Figure 4 Enlarged view of region A in the middle; Figure 6 This is a top-view disassembled view of the mandrel structure in Embodiment 1 of the rotor core stacking device for the electric vehicle drive motor of the present invention; Figure 7 for Figure 6 Cross-sectional view of region B in the middle; Figure 8 This is a top-view disassembled view of the mandrel structure in Embodiment 2 of the rotor core stacking device for the electric vehicle drive motor of the present invention; Figure 9 for Figure 8 Cross-sectional view of region C in the middle; Figure 10 This is a schematic diagram showing the positional relationship between the positioning post and the slot opening during the rotor lamination falling and stacking process of the rotor core stacking device for the electric vehicle drive motor of the present invention. Figure 11 This is a schematic diagram showing the positional relationship between the positioning post and the slot opening in the rotor core stacking device for the electric vehicle drive motor of the present invention, after the rotor laminations are stacked and are in the stacking state. Figure 12This is a schematic diagram illustrating the technical problem of the center hole being held in an inclined position on the mandrel cone.

[0022] The following are the labeling elements in the diagram: 101, base; 102, spindle; 103, rotor lamination; 104, positioning post; 105, mounting groove; 106, stabilizing ring; 201, spindle body; 202, spindle cone; 203, movable groove; 204, spring; 205, vibrating plate; 206, limiting groove; 207, limiting rod; 211, inclined shim; 212, corrective inclined surface; 213, telescopic sleeve; 301, groove opening; 302, center hole; 401, positioning post body; 402, guide area; 403, inclined guide surface; 404, transmission rod; 501, main air groove; 502, vent hole. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example: Figures 1-7 , Figure 10 , Figure 11As shown, this invention provides a rotor core stacking device for an electric vehicle drive motor, including a base 101 and a mandrel 102 mounted above the base 101. Rotor laminations 103 are stacked and sleeved on the mandrel 102. The device also includes a pressing component capable of applying downward pressure to the stacked rotor laminations 103. The mandrel 102 includes an integrally formed mandrel body 201 and a mandrel cone 202. The conical surface of the mandrel cone 202 can guide the rotor laminations 103 falling from above, making it easier for the rotor laminations 103 to be effectively sleeved onto the outer ring of the mandrel body 201 using gravity. In the prior art, when producing motor rotor cores using an automated production line, the stamped rotor laminations 103 are conveyed by a conveyor belt. A base 101 and a mandrel 102 are set below the end position of the conveyor belt, allowing the rotor laminations 103 to fall directly from the conveyor belt and be sleeved onto the mandrel 102. To avoid the rotor laminations 103 falling directly onto the mandrel 102, the device... When falling, the rotor laminations are in a vertical position, and a mechanism is added at the end of the conveyor belt to provide throwing force for the rotor laminations 103, which will not be described in detail here. However, the following problems exist: the falling rotor laminations 103 need to be effectively fitted onto the mandrel 102. The existing technology reduces the error tolerance by reducing the diameter of the mandrel 102, which results in poor uniformity between the stacked rotor laminations 103. After stacking, they cannot be directly stacked, reducing the production efficiency of the rotor core and the degree of automation. To solve the above problems, this solution designs a conical mandrel cone 202. The conical surface structure of the mandrel cone 202 is used to dynamically guide the rotor laminations 103 during the falling process. When the rotor laminations 103 that are off-axis come into contact with the conical surface of the mandrel cone 202, they are automatically corrected by the guiding force, thereby ensuring that the rotor laminations 103 are accurately fitted onto the outer ring of the mandrel body 201 and improving the positioning accuracy before stacking. Ten movable slots 203 are arranged in a circular array on the side wall of the mandrel 102. Several springs 204 are vertically and equidistantly fixed on the side wall of the movable slots 203 near the axis of the mandrel body 201. The free ends of the springs 204 are all fixed to the same vibrating plate 205. Without external force, the vibrating plate 205 is located inside the movable slot 203, and the side of the vibrating plate 205 away from the axis of the mandrel body 201 protrudes from the side wall of the mandrel 102. The vibrating plate 205 is connected to a vibration generating component, which applies a vibration force to the vibrating plate 205. The vibrating plate 205 has a sheet-like structure and is prone to vibration. When the rotor lamination 103 falls onto the mandrel cone 202, the mandrel cone 202 in its stationary state will have the following problems: Figure 12As shown, the center hole 302 is stuck on the mandrel cone 202 in an inclined state, which will cause the rotor laminations 103 to be unable to continue stacking and the automated production to continue. In this solution, the vibration generating component is activated at this time, which drives the vibrating plate 205 to generate high-frequency vibration. The amplitude can be limited by the spring 204 to avoid damage to the rotor laminations 103 due to excessive amplitude. It can also prevent the vibrating plate 205 from being completely detached from the movable slot 203 due to excessive amplitude, thus ensuring the stability of the device operation. The high-frequency vibration is transmitted to the rotor laminations 103 through the vibrating plate 205, causing the rotor laminations 103 stuck on the cone surface to be readjusted by the vibration disturbance, so that they can slide down smoothly and be fitted onto the outer ring of the mandrel body 201, ensuring the continuous and stable stacking process. Meanwhile, vibration disturbance can also eliminate the static frictional resistance between the rotor lamination 103 and the conical surface of the mandrel cone 202, accelerate the falling response speed, and further improve the installation efficiency. This solution uses the vibration plate 205 to disturb the attitude of the rotor lamination 103, rather than using the overall vibration of the mandrel 102. This effectively avoids disturbance to the stacked rotor laminations 103, ensuring that the lower stacked rotor laminations 103 remain stable when the upper rotor laminations 103 are adjusting their attitude. This minimizes mutual friction between the stacked rotor laminations 103, thereby reducing the risk of surface damage and improving the overall assembly quality of the rotor core. In addition, the vibration range of the vibration plate 205 is concentrated in the contact area between a single rotor lamination 103 and the conical surface, resulting in high energy utilization. There is no need to add an additional damping structure to suppress the vibration of the whole machine, simplifying the equipment design. The vibrating plate 205, in conjunction with the tapered guide surface, efficiently achieves dynamic correction of the rotor lamination 103, significantly improving the success rate of installation. It is suitable for high-speed automated production lines and meets the process requirements of continuous stacking of large batches of rotor cores.

[0025] Limiting grooves 206 are respectively opened on the two side walls opposite to the top of the movable groove 203. A limiting rod 207 is fixedly installed on the side wall of the top of the vibrating plate 205 near the limiting groove 206. The limiting rod 207 is movably embedded in the limiting groove 206. The limiting groove 206 plays a limiting and guiding role for the limiting rod 207, preventing the top of the vibrating plate 205 from having too large an amplitude during vibration, and avoiding obstruction to the falling rotor lamination 103.

[0026] The top of the vibrating plate 205 and the end away from the axis of the spindle body 201 are provided with rounded corners to prevent the vibrating plate 205 from rubbing against the rotor lamination 103 during vibration, which would cause scratches or jamming on the surface of the rotor lamination 103. The rounded corner design allows the top of the vibrating plate 205 to smoothly transition with the contact area of ​​the rotor lamination 103, effectively reducing frictional resistance and further ensuring that the rotor lamination 103 slides off smoothly.

[0027] Both the limiting groove 206 and the limiting rod 207 are cylindrical structures, and they are fitted with a clearance to ensure that the limiting rod 207 slides smoothly within the limiting groove 206.

[0028] A positioning post 104 is horizontally slidably mounted on the base 101. The positioning post 104 can reciprocate horizontally on the base 101. The positioning post 104 includes an integrally formed positioning post body 401 and a guide area 402. The horizontal cross-sectional shape of the positioning post body 401 matches the contour of the area of ​​the groove 301 near the axis of the spindle body 201, allowing for a tight fit. A transmission rod 404 is fixedly connected to one end of the positioning post body 401 away from the axis of the spindle body 201. The transmission rod 404 is connected to the other end of the positioning post body 401 away from the axis of the spindle body 201. With an external linear drive device, the positioning column 104 can be driven to move back and forth along a horizontal line intersecting the axis of the spindle body 201. When the positioning column 104 moves closer to the axis of the spindle body 201, the positioning column body 401 can push the vertical slot 301 to align, forming the basic shape of the rotor. Then it can directly enter the next stacking process of rotor production without manual intervention to adjust the neatness between the stacked rotor laminations 103, which greatly improves the stacking efficiency of the rotor core and reduces the labor intensity of the operators. The guide area 402 serves as the upper extension of the positioning post 104. The area of ​​the side wall of the guide area 402 near the axis of the spindle body 201 is smaller than the area of ​​the side wall of the guide area 402 away from the axis of the spindle body 201. The area of ​​the top surface of the guide area 402 is smaller than the area of ​​the bottom horizontal cross section of the guide area 402. This allows the falling rotor lamination 103 to be guided and corrected when it contacts the guide area 402, ensuring that the slot 301 is automatically calibrated to the correct position during the falling process. This facilitates the horizontal movement of the positioning post 104 and the alignment preparation of the rotor lamination 103, reducing the risk of stacking failure due to initial position deviation.

[0029] The top of the guide area 402 near the axis of the spindle body 201 is provided with an inclined guide surface 403. The inclined guide surface 403 extends from bottom to top away from the axis of the spindle body 201, reducing the top surface area of ​​the spindle 102, thereby more effectively guiding the rotor laminations 103 to fall accurately into the predetermined stacking area.

[0030] like Figures 8-9As shown, in another embodiment 2, several inclined pads 211 are vertically and equidistantly fixed on the side wall of the movable groove 203 near the axis of the spindle body 201. In a top view, the inclined pads 211 on the side wall away from the axis of the spindle body 201 are inclined surfaces extending clockwise towards the axis of the spindle body 201. The end of the spring 204 near the axis of the spindle body 201 is perpendicularly fixed to the inclined surface. A telescopic sleeve 213 is fitted around the outside of the spring 204. One end of the telescopic sleeve 213 is fixed to the inclined surface, and the other end is fixed to a vibrating plate 205. The telescopic sleeve 213 can restrict the swinging of the spring 204, ensuring that the spring 204 can only deform in its own compression or relaxation direction, thus ensuring the axial stability of the spring 204 when under force. The vibrating plate 205 is located away from the spindle body. One side wall of axis 201 is a correction slope 212. In a top view, the correction slope 212 is a clockwise slope that extends towards the axis of the spindle body 201. This design causes the vibration direction of the vibrating plate 205 to shift, so that the vibration energy is transmitted in a direction perpendicular to the slope. With the above technical solution, when the rotor lamination 103 falls, if a low-probability event occurs: the area of ​​the rotor lamination 103 between adjacent slots 301 just touches the inclined guide surface 403, causing the rotor lamination 103 to be obstructed and unable to fall quickly, then the correction slope 212 can use the vibration force perpendicular to the slope to apply a rotational guiding force to the rotor lamination 103, causing the guide area 402 to be stuck into the slot 301, reducing the fault tolerance of the continuous stacking of rotor laminations 103.

[0031] The base 101 has a mounting groove 105 in the center, the bottom of the spindle body 201 is located in the mounting groove 105, and the bottom end of the side wall of the spindle body 201 is fixedly connected to the side wall of the mounting groove 105 by a stabilizing ring 106.

[0032] The vibration generating component includes a main air groove 501 vertically opened in the center of the bottom surface of the spindle body 201. A vent hole 502 is opened through the main air groove 501 and the movable groove 203. A negative pressure pump is connected to the bottom end of the main air groove 501. The negative pressure pump draws negative pressure, causing the vibrating plate 205 to contract into the movable groove 203. Air is replenished into the main air groove 501 from the gap between the vibrating plate 205 and the movable groove 203. Since the spring 204 itself cannot maintain stability, when there is no absolute force and stable external force to compress the spring, the spring is prone to fluctuating, so that the vibrating plate 205 can be subjected to force and vibrate. In another embodiment 3, the intermittent start and stop of the negative pressure pump is used to enhance the amplitude of the vibrating plate 205, thereby further improving the vibration transmission efficiency. The rotor lamination 103 is subjected to periodic disturbance during the falling process, effectively avoiding jamming. The intermittent start and stop control is realized by the PLC timing module.

[0033] In another embodiment 4, the vibration generating component includes a vibrating plate and a vibration motor. The vibration motor is installed in the mounting groove 105 and drives the vibrating plate. The vibrating plate 205 extends downward and protrudes from the bottom surface of the spindle body 201. The bottom end of the vibrating plate 205 is fixedly connected to the vibrating plate. After the vibration motor is started, it drives the vibrating plate to vibrate, and then transmits the vibration to the vibrating plate 205. The vibrating plate 205 vibrates under the influence of its own sheet-like structure.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rotor core stacking device for an electric vehicle drive motor, comprising a base (101) and a mandrel (102) mounted above the base (101), wherein rotor laminations (103) are stacked on the mandrel (102), and further comprising a pressure-applying component capable of applying downward pressure to the stacked rotor laminations (103), characterized in that: The mandrel (102) includes an integrally formed mandrel body (201) and mandrel cone (202). At least eight movable slots (203) are arranged in a ring array on the side wall of the mandrel (102). Several springs (204) are vertically and equidistantly fixed on the side wall of the movable slot (203) near the axis of the mandrel body (201). The free ends of the springs (204) are all fixed to the same vibrating plate (205). Under no external force, the vibrating plate (205) is located inside the movable slot (203), and the side of the vibrating plate (205) away from the axis of the mandrel body (201) protrudes from the side wall of the mandrel (102). The vibrating plate (205) is connected to a vibration generating component, and the vibration generating component applies a vibration force to the vibrating plate (205).

2. The rotor core stacking device for an electric vehicle drive motor according to claim 1, characterized in that: Limiting grooves (206) are respectively opened on the top of the movable groove (203) and the side walls opposite to each other. A limiting rod (207) is fixedly installed on the side wall of the top of the vibrating plate (205) near the limiting groove (206). The limiting rod (207) is movably embedded in the limiting groove (206).

3. The rotor core stacking device for an electric vehicle drive motor according to claim 2, characterized in that: The top of the vibrating plate (205) and the end away from the axis of the spindle body (201) are provided with rounded corners to prevent the vibrating plate (205) from rubbing against the rotor lamination (103) during vibration, which would cause scratches on the surface of the rotor lamination (103).

4. The rotor core stacking device for an electric vehicle drive motor according to claim 3, characterized in that: Both the limiting groove (206) and the limiting rod (207) are cylindrical structures, ensuring that the limiting rod (207) slides smoothly within the limiting groove (206).

5. The rotor core stacking device for an electric vehicle drive motor according to claim 1, characterized in that: A positioning post (104) is horizontally slidably mounted on the base (101). The positioning post (104) can slide back and forth on the base (101) in the horizontal direction. The positioning post (104) includes an integrally formed positioning post body (401) and a guide area (402). The horizontal cross-sectional shape of the positioning post body (401) matches the contour of the area of ​​the groove (301) near the axis of the spindle body (201) and can fit tightly. A transmission rod (404) is fixedly connected to one end of the positioning post body (401) away from the axis of the spindle body (201). An external linear drive device is connected to one end of the transmission rod (404) away from the positioning post body (401). The side wall area of ​​the guide area (402) near the axis of the spindle body (201) is smaller than the side wall area of ​​the guide area (402) away from the axis of the spindle body (201). The top surface area of ​​the guide area (402) is smaller than the bottom horizontal cross-sectional area of ​​the guide area (402).

6. The rotor core stacking device for an electric vehicle drive motor according to claim 5, characterized in that: The guide area (402) has an inclined guide surface (403) at the top of the side near the axis of the spindle body (201), and the inclined guide surface (403) extends from bottom to top away from the axis of the spindle body (201).

7. The rotor core stacking device for an electric vehicle drive motor according to claim 1, characterized in that: On the side wall of the movable groove (203) near the axis of the spindle body (201), several inclined pads (211) are vertically and equidistantly fixed. In a top view, the side wall of the inclined pad (211) away from the axis of the spindle body (201) is an inclined surface that extends clockwise towards the axis of the spindle body (201). The end of the spring (204) near the axis of the spindle body (201) is perpendicularly fixed to the inclined surface. A telescopic sleeve (213) is fitted on the outside of the spring (204). One end of the telescopic sleeve (213) is fixed to the inclined surface, and the other end is fixed to the vibrating plate (205). The telescopic sleeve (213) can restrict the spring (204) from swinging, so that the spring (204) can only produce deformation in its own compression or relaxation direction. The side wall of the vibrating plate (205) away from the axis of the spindle body (201) is the correction inclined surface (212). In the top view, the correction inclined surface (212) is a clockwise inclined surface that extends towards the axis of the spindle body (201).

8. The rotor core stacking device for an electric vehicle drive motor according to claim 1, characterized in that: The base (101) has a mounting groove (105) in the center. The bottom of the spindle body (201) is located in the mounting groove (105). The bottom end of the side wall of the spindle body (201) is fixedly connected to the side wall of the mounting groove (105) through a stabilizing ring (106).

9. The rotor core stacking device for an electric vehicle drive motor according to claim 8, characterized in that: The vibration generating component includes a main air groove (501) vertically opened in the center of the bottom surface of the spindle body (201). A vent hole (502) is opened through the main air groove (501) and the movable groove (203). A negative pressure pump is connected to the bottom end of the main air groove (501). The negative pressure pump draws negative pressure to make the vibrating plate (205) vibrate.

10. The rotor core stacking device for an electric vehicle drive motor according to claim 8, characterized in that: The vibration generating component includes a vibrating plate and a vibration motor. The vibration motor is installed in the mounting groove (105). The vibration motor drives the vibrating plate. The vibrating plate (205) extends downward and protrudes from the bottom surface of the spindle body (201). The bottom end of the vibrating plate (205) is fixedly connected to the vibrating plate.

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