Rotor core laminating device of electric vehicle driving motor

Abstract

The invention discloses a rotor core lamination device of an electric vehicle driving motor, and relates to the technical field of lamination production of rotor bodies, the rotor core lamination device comprises a core shaft main body and a core shaft cone which are integrally formed, and the conical surface of the core shaft cone can guide a rotor punching sheet falling from the upper part. And the rotor punching sheet can be easily and effectively sleeved on the outer ring of the core shaft main body by utilizing gravity. According to the scheme, the problem of clamping stagnation caused by alignment deviation in the stacking process of the rotor punching sheets can be effectively solved, and automatic deviation correction and continuous and stable discharging are achieved through the synergistic effect of the inclined plane guide structure and the vibration sheets; in the scheme, the vibration source adopts a negative pressure pneumatic design, so that the amplitude of each area of the vibration sheet can be balanced, the operation reliability of the device is improved, the lamination efficiency of the rotor iron core is remarkably improved, the equipment failure rate and the manual intervention frequency are reduced, and the high-speed automatic production requirement is met; according to the scheme, a positioning column is further designed, the initial falling position of the rotor punching sheet can be effectively limited, and the stacking precision is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laminating production of rotor body, in particular to a rotor core laminating device of electric vehicle driving motor. BACKGROUND

[0002] The rotor core laminating device is a special device for accurately laminating rotor punching sheets (mostly silicon steel sheets) into complete cores in the manufacture of electric vehicle motors, and its core function is to ensure the lamination accuracy, density and structural strength of the core, laying a foundation for subsequent motor assembly.

[0003] The Chinese utility model patent with the authorization announcement number CN218335668U discloses a stator and rotor core laminating device, which comprises a support frame, an operation disc, a hydraulic column and a fixing assembly, the fixing assembly comprises a pushing spring, a limiting plate, an elastic piece, a fixing strip and a pressing rod, the pushing spring is arranged in an operation cavity, two ends of the pushing spring are fixedly connected with the operation disc and the limiting plate respectively, one end of the elastic piece is fixedly connected with the limiting plate, the fixing strip is fixedly connected with the other end of the elastic piece, the pressing rod is slidably connected with the operation disc, the fixing strip is pushed out of the clamping groove by pressing the pressing rod, and the limiting plate pushes out the laminated stator and rotor core in the operation cavity under the resilience of the pushing spring, so that the laminated rotor core is conveniently taken out, and the processing efficiency is improved.

[0004] The above-mentioned utility model patent improves the existing technology from the perspective of efficiently taking out the laminated core, but the existing technology still has the technical problem of poor automation degree of rotor lamination production process.

[0005] In the prior art, when an automatic production line is used to produce a motor rotor core, the punched rotor punching sheets are conveyed along with the conveying belt, a base and a core shaft are arranged below the terminal position of the conveying belt, so that the rotor punching sheets can directly fall off the conveying belt and be sleeved on the core shaft. In order to prevent the rotor punching sheets from falling vertically, a mechanism can be installed at the end of the conveying belt to provide a throwing force for the rotor punching sheets, which will not be described here. However, there are the following problems: the falling rotor punching sheets need to be effectively sleeved on the core shaft, and the existing technology reduces the fault tolerance by reducing the diameter of the core shaft, which leads to poor alignment between the stacked rotor punching sheets, and the stacked rotor punching sheets cannot be directly laminated after stacking, which reduces the production efficiency of the rotor core and lowers the degree of automation. Therefore, there is an urgent need for a rotor core laminating device of electric vehicle driving motor to solve the problems in the prior art. SUMMARY

[0006] The purpose of the present application is to provide a rotor core laminating device of electric vehicle driving motor to solve the technical problem of low automation degree of core lamination in the prior art.

[0007] To achieve the above object, the present application provides the following technical solutions: The rotor core stacking device of the electric vehicle driving motor comprises a base and a core shaft installed above the base, the core shaft is stacked with rotor punching sheets, and further comprises a pressing component capable of pressing the stacked rotor punching sheets downward, the core shaft comprises a core shaft body and a core shaft taper which are integrally formed, the taper surface of the core shaft taper can guide the rotor punching sheets falling from above, so that the rotor punching sheets are easily and effectively sleeved on the outer circle of the core shaft body by using gravity. At least 8 movable grooves are arranged in a ring array on the side wall of the core shaft, a plurality of springs are vertically and equidistantly fixed on the side wall near the axis of the core shaft body, the free ends of the springs are fixedly connected to the same vibration sheet, under the action of no external force, the vibration sheet is located inside the movable groove, and the side of the vibration sheet away from the axis of the core shaft body protrudes out of the side wall of the core shaft, and the vibration sheet is drivingly connected to a vibration generating component.

[0008] As a preferred scheme, a limiting groove is arranged on the side wall of each of the opposite sides of the top end of the movable groove, a limiting rod is correspondingly fixedly arranged on the side wall near the top end of the vibration sheet, the limiting rod is movably embedded in the limiting groove, the limiting groove plays a limiting and guiding role on the limiting rod, prevents the amplitude of the top end of the vibration sheet from being too large during vibration, and avoids blocking the falling rotor punching sheets.

[0009] As a preferred scheme, a rounded corner is arranged at the top end of the vibration sheet and away from the axis of the core shaft body, which avoids scratching the rotor punching sheets during vibration, causes the surface of the rotor punching sheets to be scratched or stuck, the rounded corner design can make the contact area between the top end of the vibration sheet and the rotor punching sheets smoothly transition, effectively reduce the friction resistance, and further ensure the smooth sliding of the rotor punching sheets.

[0010] As a preferred scheme, the limiting groove and the limiting rod are both cylindrical structures, and the gap between them is matched to ensure smooth sliding of the limiting rod in the limiting groove.

[0011] As a preferred scheme, a positioning column is horizontally slidably arranged on the base, the positioning column can reciprocate along the horizontal direction on the base, the positioning column comprises an integral positioning column body and a guide area, the horizontal section shape of the positioning column body matches the contour of the area close to the shaft body axis of the wire slot opening, can be closely fitted, a transmission rod is fixedly connected to the end of the positioning column body away from the shaft body axis, a linear driving device outside is drivingly connected to the end of the transmission rod away from the positioning column body, can drive the positioning column to reciprocate along the horizontal line intersecting the shaft body axis, when the positioning column moves towards the shaft body axis, the positioning column body can push the vertical wire slot opening to align, form the basic form of the rotor, and then can directly enter the next step of the rotor production process, without manual intervention to adjust the neatness between the stacked rotor punching sheets, greatly improve the rotor core stacking efficiency, while reducing the labor intensity of the operator. The guide area is an upper end extension of the positioning column, the side wall area of the side close to the shaft body axis of the guide area is smaller than the side wall area of the side away from the shaft body axis of the guide area, the top area of the guide area is smaller than the horizontal section area of the bottom of the guide area, so that the falling rotor punching sheet can guide and correct the position of the wire slot opening when contacting the guide area, ensure that the wire slot opening is automatically calibrated to the correct position during the falling process, facilitate the horizontal movement of the positioning column and the alignment of the rotor punching sheet, reduce the risk of stacking failure caused by initial position deviation.

[0012] As a preferred scheme, an inclined guide surface is arranged on the top of the side close to the shaft body axis of the guide area, the inclined guide surface expands away from the shaft body axis from bottom to top, reduces the top area of the shaft, so that the rotor punching sheet can be more effectively guided to fall accurately to the predetermined stacking area.

[0013] As a preferred scheme, a plurality of inclined surface washers are vertically and equidistantly fixed on the side wall of the end close to the shaft body axis of the movable slot, in the top view state, the side wall of the side away from the shaft body axis of the inclined surface washer is an inclined surface extending in the clockwise direction and towards the shaft body axis, the end close to the shaft body axis of the spring is fixedly connected to the inclined surface perpendicularly; a telescopic sleeve is arranged outside the spring, one end of the telescopic sleeve is fixedly connected to the inclined surface, and the other end is fixedly connected to a vibrating plate, the telescopic sleeve can limit the swing of the spring, so that the spring can only deform in the compression or relaxation direction, ensure the axial stability of the spring under stress, the side wall of the side away from the shaft body axis of the vibrating plate is a correction inclined surface, in the top view state, the correction inclined surface is an inclined surface extending in the clockwise direction and towards the shaft body axis; this scheme makes the vibration direction of the vibrating plate deviate, and the vibration energy is transmitted in the direction perpendicular to the inclined surface; Adopting the technical scheme, if a small probability event occurs when the rotor lamination falls, that is, the rotor lamination region between adjacent line slot openings just interferes with the inclined guide surface, the rotor lamination is blocked and cannot fall quickly, the deviation correction inclined surface can use the vibration force perpendicular to the inclined surface direction to exert a rotating guide force on the rotor lamination, so that the guide region is clamped into the line slot opening, and the fault tolerance of the continuous stacking of the rotor laminations is reduced.

[0014] As a preferred scheme, the base is centrally provided with a mounting groove, 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 with the side wall of the mounting groove through a stable ring.

[0015] As a preferred scheme, the vibration generating component comprises a main air groove vertically formed in the center of the bottom surface of the mandrel body, an air vent is formed through between the main air groove and the movable groove, a negative pressure pump is communicated with the bottom end of the main air groove, the negative pressure pump draws negative pressure, the vibration plate is contracted towards the inside of the movable groove, air is supplemented from the gap between the vibration plate and the movable groove into the main air groove, and due to the instability of the spring itself, when the spring is compressed without absolute force and stable external force, the spring is easily in a fluctuating state, so that the vibration plate can be vibrated under force. As a preferred scheme, the intermittent start-stop negative pressure pump mode can enhance the amplitude of the vibration plate, thereby further improving the vibration transmission efficiency, periodically disturbing the rotor laminations in the falling process, effectively avoiding the jamming phenomenon, and realizing the intermittent start-stop control through a PLC timing module.

[0016] As a preferred scheme, the vibration generating component comprises a vibration plate and a vibration motor, the vibration motor is installed in the mounting groove, the vibration motor is drivingly connected with the vibration plate, the vibration plate extends downward and protrudes from the bottom surface of the mandrel body, the bottom end of the vibration plate is fixedly connected with the vibration plate, the vibration motor drives the vibration plate to vibrate after being started, vibration is then transmitted to the vibration plate, and the vibration plate is vibrated under the influence of the plate-shaped structure thereof.

[0017] As a preferred scheme, the pressure applying component is provided with a slot opening capable of avoiding the mandrel and the positioning column, so that the mandrel and the positioning column are not interfered with during the pressure applying process.

[0018] Compared with the prior art, the application has the following beneficial effects: 1. The scheme can effectively solve the jamming problem of the rotor laminations caused by the alignment deviation during the stacking process, and automatic deviation correction and continuous and stable discharging are realized through the cooperation of the inclined surface guide structure and the vibration plate. 2. In the scheme, the vibration source adopts a negative pressure pneumatic design, the amplitudes of all regions of the vibration plate 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.

[0019] 3. In the scheme, the rotating guide force can be provided for the rotor lamination during the falling process of the rotor, so that the posture is automatically adjusted in the slight vibration, the deflection angle is corrected, the line slot opening and the guide area are accurately aligned, the rapid falling of the rotor lamination is ensured, and the rotor lamination falling from above is not blocked.

[0020] 4. In the scheme, the positioning column is designed, the initial falling position of the rotor lamination can be effectively limited, the position deviation caused by free fall is avoided, and the stacking accuracy is further improved; meanwhile, the horizontal driving of the positioning column can be utilized to further align the vertical line slot opening after the stacking of the rotor lamination is completed, and the clamping effect can be achieved, so that the aligned line slot opening can be kept in a stable alignment state, and the dislocation caused by vibration or external force in the subsequent processing process is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a left oblique view schematic diagram of the overall structure of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 2 It is a right oblique view schematic diagram of the overall structure of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 3 It is a front view of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 4 It is a partially exploded schematic diagram of the mandrel structure of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 5 It is a front view of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 4 Figure 6 It is a partially exploded top view of the mandrel structure in embodiment 1 of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 7 It is a front view of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 6 Figure 8 It is a partially exploded top view of the mandrel structure in embodiment 2 of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 9 It is a front view of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 8 Figure 10 It is a schematic diagram of the position relationship between the positioning column and the line slot opening in the falling and stacking process of the rotor lamination of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 11 It is a schematic diagram of the position relationship between the positioning column and the line slot opening in the falling and stacking process of the rotor lamination of the rotor core stacking device of the electric vehicle driving motor of the application; Figure 12 ​​​The technical problem of the center hole being clamped on the mandrel cone in an inclined state is shown in the schematic diagram.

[0022] Label in the figure: 101, base; 102, mandrel; 103, rotor lamination; 104, positioning column; 105, mounting groove; 106, stable ring; 201, mandrel main body; 202, mandrel cone; 203, movable slot; 204, spring; 205, vibrating reed; 206, limiting slot; 207, limiting rod; 211, inclined gasket; 212, deviation correction inclined surface; 213, telescopic sleeve; 301, wire slot; 302, center hole; 401, positioning column main body; 402, guide area; 403, inclined guide surface; 404, transmission rod; 501, main air groove; 502, air hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0024] Embodiment: as Figures 1-7 , Figure 10 , Figure 11As shown, the application provides a rotor core stacking device for an electric vehicle drive motor, which comprises a base 101 and a mandrel 102 mounted above the base 101, the mandrel 102 is stacked with rotor laminations 103 sleeved thereon, and further comprises a pressing component capable of pressing the stacked rotor laminations 103 downward, the mandrel 102 comprises a mandrel body 201 and a mandrel cone 202 formed integrally, and the conical surface of the mandrel cone 202 can guide the rotor laminations 103 falling from above, so that the rotor laminations 103 are easily sleeved on the outer circle of the mandrel body 201 by gravity. In the prior art, when producing a motor rotor core by using an automatic production line, the punched rotor laminations 103 are conveyed by a conveying belt, and the base 101 and the mandrel 102 are arranged below the terminal position of the conveying belt, so that the rotor laminations 103 can fall from the conveying belt and be directly sleeved on the mandrel 102. In order to avoid the rotor laminations 103 from being in a vertical state when falling, a mechanism capable of providing a throwing force for the rotor laminations 103 is additionally arranged at the end of the conveying belt, which will not be described here. However, the following problems exist: the falling rotor laminations 103 need to be effectively sleeved on the mandrel 102, and the prior art reduces the fault tolerance by reducing the diameter of the mandrel 102, which leads to poor alignment between the stacked rotor laminations 103, and the stacked rotor laminations 103 cannot be directly stacked after stacking is completed, thereby reducing the production efficiency of the rotor core and lowering the degree of automation. In order to solve the above problems, the mandrel cone 202 is designed to be conical, and the conical surface structure of the mandrel cone 202 dynamically guides the rotor laminations 103 during falling, so that the rotor laminations 103 deviating from the axis are automatically corrected by the guiding force when falling and contacting the conical surface of the mandrel cone 202, thereby ensuring that the rotor laminations 103 are accurately sleeved on the outer circle of the mandrel body 201 and improving the positioning accuracy before stacking. Figure 12As shown, the center hole 302 is clamped on the mandrel cone 202 in an inclined state, which will cause the rotor lamination 103 to be unable to continue stacking and unable to continue automatic production. At this time, the vibration generating component is started to drive the vibration piece 205 to generate high-frequency vibration, and the amplitude can be limited by the spring 204 to avoid damage to the rotor lamination 103 due to excessive amplitude, and also to avoid the whole vibration piece 205 from being separated from the movable groove 203 due to excessive amplitude, thereby ensuring the stability of the device operation. The high-frequency vibration is transmitted to the rotor lamination 103 through the vibration piece 205, so that the rotor lamination 103 clamped on the cone surface is disturbed by vibration to re-adjust the posture, thereby smoothly sliding and sleeving on the outer circle of the mandrel main body 201, ensuring the continuity and stability of the stacking process. At the same time, the vibration disturbance can also eliminate the static friction resistance between the rotor lamination 103 and the cone surface of the mandrel cone 202, speed up the falling response speed, and further improve the sleeving efficiency. The present scheme uses the vibration of the vibration piece 205 to disturb the posture of the rotor lamination 103, rather than using the whole vibration of the mandrel 102, which effectively avoids disturbing the already stacked rotor laminations 103, ensures that the upper rotor lamination 103 remains stable when adjusting the posture, and maximizes the avoidance of mutual friction between the already 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 piece 205 is concentrated in the contact area between a single rotor lamination 103 and the cone surface, with high energy utilization, and without the need for additional damping structure to suppress the vibration of the whole machine, thereby simplifying the design of the equipment. The vibrating vibration piece 205 cooperates with the conical guide surface to efficiently realize dynamic correction of the rotor lamination 103, significantly improve the success rate of sleeving, and is suitable for high-speed automatic production lines to meet the process requirements of continuous stacking of large quantities of rotor cores.

[0025] A limiting groove 206 is formed on the top end of the movable groove 203 on the opposite sides of the side wall, and a limiting rod 207 is fixed on the side wall of the limiting groove 206 at the top end of the vibration piece 205. The limiting rod 207 is movably embedded in the limiting groove 206, and the limiting groove 206 limits and guides the limiting rod 207, preventing the amplitude of the top end of the vibration piece 205 from being too large during vibration, and avoiding blocking the falling rotor lamination 103.

[0026] A rounded corner is formed at the top end of the vibration piece 205 away from the axis of the mandrel main body 201, which avoids scratching between the vibration piece 205 and the rotor lamination 103 during vibration, causing scratches or jamming on the surface of the rotor lamination 103. The rounded corner design can make the contact area between the top end of the vibration piece 205 and the rotor lamination 103 smooth, effectively reducing the friction resistance, and further ensuring the smooth sliding of the rotor lamination 103.

[0027] The limiting groove 206 and the limiting rod 207 are both cylindrical structures, and the gap between them ensures smooth sliding of the limiting rod 207 in the limiting groove 206.

[0028] The positioning column 104 is horizontally slidably installed on the base 101 and can reciprocate along the horizontal direction on the base 101. The positioning column 104 includes an integrally formed positioning column body 401 and a guide area 402. The horizontal cross-sectional shape of the positioning column body 401 matches the profile of the slot opening 301 near the axis line area of the shaft body 201, and can be closely fitted. The positioning column body 401 is fixedly connected with a transmission rod 404 at an end away from the axis line of the shaft body 201. The transmission rod 404 is drivingly connected with an external linear driving device at an end away from the positioning column body 401, and can drive the positioning column 104 to reciprocate along a horizontal line intersecting the axis line of the shaft body 201. When the positioning column 104 moves towards the axis line of the shaft body 201, the positioning column body 401 can push and align the vertical slot opening 301, forming the basic form of the rotor, and then directly entering the next lamination process of the rotor production without manual intervention for adjusting the neatness between the stacked rotor laminations 103, greatly improving the lamination efficiency of the rotor core and reducing the labor intensity of the operator. The guide area 402 is an upper end extension of the positioning column 104. The side wall area of the guide area 402 near the axis line of the shaft body 201 is smaller than the side wall area of the guide area 402 away from the axis line of the shaft body 201. The top area of the guide area 402 is smaller than the bottom horizontal cross-sectional area of the guide area 402, so that the falling rotor lamination 103 can guide and correct the position of the slot opening 301 when it contacts the guide area 402, ensuring that the slot opening 301 is automatically calibrated to the correct position during the falling process, providing convenience for the horizontal movement of the positioning column 104 and the alignment of the rotor lamination 103, and reducing the risk of lamination failure caused by initial position deviation.

[0029] The guide area 402 is provided with an inclined guide surface 403 at the top near the axis line of the shaft body 201. The inclined guide surface 403 expands away from the axis line of the shaft body 201 from bottom to top, reducing the top area of the shaft 102, so as to more effectively guide the rotor lamination 103 to accurately fall to the predetermined stacking area.

[0030] As Figures 8-9As shown in another embodiment 2, the movable groove 203 is vertically and equidistantly provided with a plurality of inclined pads 211 on the side wall of one end of the mandrel body 201 axis, and the inclined pad 211 away from the side wall of one end of the mandrel body 201 axis is an inclined surface extending in a clockwise direction and towards the mandrel body 201 axis in a top view; the spring 204 is vertically fixed to the inclined surface at one end of the mandrel body 201 axis; the spring 204 is sleeved with an expansion sleeve 213 at the outside, one end of the expansion sleeve 213 is fixed to the inclined surface, and the other end is fixed to the vibrating plate 205; the expansion sleeve 213 can limit the swing of the spring 204, so that the spring 204 can only deform in the direction of compression or relaxation, thereby ensuring the axial stability of the spring 204 under stress; the vibrating plate 205 away from the side wall of one end of the mandrel body 201 axis is a correction inclined surface 212, which is an inclined surface extending in a clockwise direction and towards the mandrel body 201 axis in a top view; this scheme makes the vibration direction of the vibrating plate 205 deviate, so that the vibration energy is transmitted in a direction perpendicular to the inclined surface; when the rotor punching sheet 103 falls, if a small probability event occurs: the rotor punching sheet 103 region between adjacent wire slot openings 301 just touches the inclined guide surface 403, causing the rotor punching sheet 103 to be blocked and unable to fall quickly, the correction inclined surface 212 can use the vibration force perpendicular to the inclined surface to exert a rotating guide force on the rotor punching sheet 103, so as to make the guide area 402 enter the wire slot opening 301, thereby reducing the fault tolerance of the continuous stacking of the rotor punching sheet 103.

[0031] The base 101 is centrally provided with a mounting groove 105, and the bottom of the mandrel body 201 is located in the mounting groove 105. The bottom end of the side wall of the mandrel body 201 is fixedly connected with the side wall of the mounting groove 105 through a stable ring 106.

[0032] The vibration generating component includes a main air groove 501 vertically provided in the central bottom surface of the mandrel body 201. The main air groove 501 and the movable groove 203 are provided with an air hole 502. The bottom end of the main air groove 501 is communicated with a negative pressure pump. The negative pressure pump draws negative pressure, so that the vibrating plate 205 shrinks into the movable groove 203. Air is supplemented from the gap between the vibrating plate 205 and the movable groove 203 into the main air groove 501. Due to the instability of the spring 204 itself, when there is no absolute force and stable external force to compress the spring, the spring is easy to be in a fluctuating state, so that the vibrating plate 205 can be vibrated under stress. In another embodiment 3, the negative pressure pump is intermittently started and stopped, which can enhance the amplitude of the vibrating plate 205, thereby further improving the vibration transmission efficiency, so that the rotor punching sheet 103 is periodically disturbed during the falling process, effectively avoiding the jamming phenomenon. The intermittent start and stop control is realized through a PLC timing module.

[0033] In another embodiment 4, the vibration generating component comprises a vibration plate and a vibration motor, the vibration motor is installed in the installation groove 105, the vibration motor is drivingly connected with the vibration plate, the vibration sheet 205 extends downwardly and protrudes from the bottom surface of the shaft body 201, the bottom end of the vibration sheet 205 is fixedly connected with the vibration plate, the vibration motor drives the vibration plate to vibrate after being started, and then the vibration is transmitted to the vibration sheet 205, and the vibration sheet 205 generates vibration under the influence of the sheet structure.

[0034] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered 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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