Assembly process for automotive starter motor rotor

Abstract

The application discloses an assembling process of a rotor of a car starter motor, and particularly comprises the following steps: S1, placing an unshafted rotor to be assembled on an assembling device; S2, inserting a positioning pin into a shaft hole of the unshafted rotor; and S3, moving the unshafted rotor so that it can be sequentially moved to a processing position and positioned. The application relates to the technical field of rotor assembling. The assembling process of the rotor of the car starter motor is characterized in that a rotating placement structure is intermittently rotated by a driving mechanism, so that the rotating shaft can be sequentially moved to the processing position, thereby sequentially completing the assembling work of the rotor. When the rotating shaft is ejected by an ejection mechanism, the bottom of the rotor is first extruded by a placement cylinder, so that the rotor can be tightly fixed and prevented from being deviated, and then the end of the positioning pin is inserted into the placement cylinder, and then the baffle pushes the rotating shaft to eject the positioning pin, thereby assisting the positioning of the contact point of the rotating shaft and the positioning pin.

Description

Technical Field

[0001] This invention relates to the field of motor rotor assembly technology, specifically the assembly process of automobile starter motor rotors. Background Technology

[0002] Chinese Patent Publication No. CN103986284A discloses a motor rotor assembly fixture, including a circular base with three radially arranged grooves evenly distributed on the base. A slider capable of sliding radially along the grooves is provided within each groove. A support block is located in the center of the base, consisting of an upper cylindrical structure and a lower hemispherical structure. A spherical groove in the center of the base mates with the lower hemispherical structure of the support block. A through hole is provided at the bottom of the groove, leading to the bottom of the base. A positioning pin passes through the through hole from bottom to top in the bottom of the base. A pin hole in the center of the support block accommodates the positioning pin. This invention also relates to a method for assembling a motor rotor assembly fixture. The motor rotor assembly fixture of this invention is simple to manufacture, has low manufacturing cost, and is easy to assemble. It can prevent tilting or bending of the shaft during assembly, ensure the coaxiality of the shaft and the center position of the shaftless rotor, improve product performance, and increase enterprise efficiency.

[0003] The existing technical solutions described above have the following drawbacks: First, when fixing the shaftless rotor, manual assistance is required to adjust the position of the slider according to the position of the shaftless rotor. After adjustment, the bolts need to be manually rotated to fix the position of the slider. Second, when assembling the shaftless rotor, manual assistance is required for loading and unloading, which increases the labor intensity of the workers. Third, in this technical solution, there is no auxiliary guiding structure at the contact point between the rotating shaft and the positioning pin, which causes the rotating shaft to wobble during the ejection of the positioning pin, thus affecting the assembly effect. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an assembly process for an automotive starter motor rotor, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: the assembly process of the rotor of an automotive starter motor, specifically including the following steps: S1. Place the shaftless rotor to be assembled on the assembly equipment; S2. Insert the locating pin into the shaft hole of the shaftless rotor; S3. Move the shaftless rotor so that it can move sequentially to the processing area, and position the shaftless rotor that has been moved to the processing area to prevent its position from shifting. S4. Insert the rotating shaft into the shaft hole of the shaftless rotor and push out the locating pin to complete the assembly of the shaftless rotor. The assembled rotor is removed from the equipment and the next shaftless rotor to be assembled is moved to the processing area. The equipment in step S1 includes a workbench with a guide groove open at both ends on the top. One end of a positioning pin passes through the guide groove. The workbench is equipped with a positioning and moving mechanism for sequentially shifting and positioning the rotor. The workbench is equipped with a rotating placement structure for placing the rotating shaft and an ejection mechanism for pushing the rotating shaft upward. The rotating placement structure is driven to rotate intermittently by a drive mechanism, which simultaneously drives the ejection mechanism to push the rotating shaft out.

[0006] Preferably, the positioning and moving mechanism includes a fixed plate fixedly mounted on the worktable and located on one side of the guide groove, a moving plate located on the other side of the guide groove on the worktable, and a driving component on the worktable for driving the moving plate to fix the rotor and move it.

[0007] Preferably, the driving component includes a drive shaft rotatably mounted on the worktable, the outer surfaces of the two drive shafts are connected by a transmission component, a cam is fixedly mounted on the top end of the drive shaft, a fixed rod is rotatably mounted between the protrusion of the cam and the moving plate, a drive motor is fixedly mounted on the worktable, and the output shaft of the drive motor is fixedly connected to the end of one of the drive shafts through a coupling.

[0008] Preferably, the rotary placement structure includes a rotary shaft rotatably disposed inside the worktable, a rotary disk fixedly disposed at the top end of the rotary shaft, and a placement cylinder for placing the rotary shaft slidably disposed inside the rotary disk.

[0009] Preferably, a baffle is slidably provided inside the placement tube, and a connecting part is slidably provided on the outer surface of the placement tube. The baffle is fixedly connected to the connecting part, and a connecting elastic component is fixedly provided on the outer surface of the placement tube. One end of the connecting elastic component is fixedly connected to the connecting part.

[0010] Preferably, the ejection mechanism includes an ejection plate slidably disposed inside the worktable, an ejection rod slidably disposed inside the worktable, an ejection block fixedly disposed at the top end of the ejection rod, and the ejection plate moving drives the ejection rod to move the ejection block in the vertical direction.

[0011] Preferably, a stabilizing rod is fixedly installed on the outer side of the ejector plate and slidably disposed on the inner surface of the workbench. The interior of the ejector plate is hollow, and inclined grooves are opened through both sides of its inner wall. An extension column through the inclined groove is fixedly installed at the bottom of the outer side of the ejector rod.

[0012] Preferably, the driving mechanism includes a rotary motor fixedly installed inside the worktable, the output shaft of the rotary motor being fixedly connected to a connecting shaft via a coupling, a driving disk being fixedly installed at the bottom end of the connecting shaft, an eccentric shaft being rotatably installed at the bottom of the driving disk, a driving rod being slidably installed inside the worktable, the bottom end of the eccentric shaft extending into the driving rod and slidably installed therewith, a connecting rod being fixedly installed between the driving rod and the ejector plate, and a connecting transmission component being installed between the connecting shaft and the rotary shaft.

[0013] Preferably, the connecting transmission component includes a transmission gear fixedly disposed on the outer surface of the rotating shaft, a first limiting disk fixedly disposed on the top of the transmission gear, a drive gear meshing with the transmission gear fixedly disposed on the outer surface of the connecting shaft, and a second limiting disk that can limit the first limiting disk fixedly disposed on the top of the drive gear.

[0014] Beneficial effects This invention provides an assembly process for an automotive starter motor rotor. Compared with existing technologies, it has the following advantages: (1) The assembly process of the automobile starter motor rotor is to open a guide groove on the workbench so that when the rotor is placed, one end of the positioning pin passes through the guide groove to guide the movement direction of the rotor to be processed; at the same time, the positioning and moving mechanism can drive the rotor to be processed to be processed to the processing location in sequence, without the need for staff to place them one by one, which improves the processing efficiency, and the processed rotor can fall along the guide plate, which facilitates the automated collection of the processed rotor.

[0015] (2) The assembly process of the automobile starter motor rotor is to drive the rotating placement structure to rotate intermittently through the drive mechanism, so that the rotating shaft can be moved to the processing position in sequence, thereby completing the assembly of the rotor in sequence; and when the ejection mechanism ejects the rotating shaft, the bottom of the rotor is first squeezed by the placement cylinder to press and fix it to prevent its position from shifting. At the same time, the end of the positioning pin is inserted into the placement cylinder, and then the baffle pushes the rotating shaft to eject the positioning pin, thereby assisting in positioning the contact point between the rotating shaft and the positioning pin, effectively improving the stability of the rotor in the assembly process and improving the assembly accuracy of the rotor. Attached Figure Description

[0016] Figure 1 This is a perspective view of the external structure of the present invention; Figure 2 This is a schematic cross-sectional view of the external structure of the present invention; Figure 3 For the present invention Figure 2 sectional view diagram; Figure 4 This is a perspective view of the workbench structure of the present invention; Figure 5 This is a perspective view of the internal structure of the present invention; Figure 6 This is a perspective view of the positioning and moving mechanism of the present invention; Figure 7 This is a perspective view of the rotating placement structure of the present invention; Figure 8 For the present invention Figure 7 A partial sectional view of the structure; Figure 9 This is a schematic diagram showing the disassembly of the placement tube of the present invention; Figure 10 This is a perspective view of the connecting and transmission components of the present invention; Figure 11 This is a perspective view of the ejection mechanism of the present invention.

[0017] In the diagram: 1-Workbench, 2-Guide groove, 3-Positioning and moving mechanism, 301-Fixed plate, 302-Moving plate, 303-Drive shaft, 304-Transmission component, 305-Cam, 306-Fixed rod, 307-Drive motor, 4-Rotating placement structure, 401-Rotating shaft, 402-Rotating disk, 403-Placement cylinder, 404-Baffle, 405-Connecting part, 406-Connecting elastic component, 5-Ejection Mechanism, 501-Ejection plate, 502-Ejection rod, 503-Ejection block, 504-Stabilizing rod, 505-Inclined groove, 506-Extension column, 6-Drive mechanism, 601-Rotary motor, 602-Connecting shaft, 603-Drive disk, 604-Eccentric shaft, 605-Drive rod, 606-Connecting rod, 607-Transmission gear, 608-First limit disk, 609-Drive gear, 6010-Second limit disk. Detailed Implementation

[0018] 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.

[0019] This invention provides the following two technical solutions: Example 1: The assembly process of an automotive starter motor rotor includes the following steps: S1. Place the shaftless rotor to be assembled on the assembly equipment; S2. Insert the locating pin into the shaft hole of the shaftless rotor; S3. Move the shaftless rotor so that it can move sequentially to the processing area, and position the shaftless rotor that has been moved to the processing area to prevent its position from shifting. S4. Insert the rotating shaft into the shaft hole of the shaftless rotor and push out the locating pin to complete the assembly of the shaftless rotor. The assembled rotor is removed from the equipment, and the next shaftless rotor to be assembled is moved to the processing area.

[0020] Example 2: Please refer to Figure 1-11 Based on Embodiment 1, this invention provides another technical solution: The equipment in step S1 includes a workbench 1, with an inclined guide plate fixedly installed on one side of the workbench 1. A guide groove 2 with openings at both ends is provided on the top of the workbench 1, wherein one end of a positioning pin passes through the guide groove 2, and the outer surface of the positioning pin contacts the inner surface of the guide groove 2 without squeezing, thus improving its guiding effect. Through the setting of the guide groove 2, the movement direction of the rotor to be processed is guided by the positioning pin. A positioning and moving mechanism 3 is provided on the workbench 1 for sequentially shifting and positioning the rotor. Through the setting of the positioning and moving mechanism 3, automated unloading can be achieved after the rotor assembly is completed, and the next rotor to be processed can be moved to the processing location simultaneously. A rotating placement structure 4 for placing the rotating shaft is provided inside the workbench 1, and an ejection mechanism 5 for pushing the rotating shaft upwards is provided inside the workbench 1. The rotating placement structure 4 is driven to rotate intermittently by a driving mechanism 6, while the ejection mechanism 5 pushes the rotating shaft out simultaneously.

[0021] Regarding the design of the positioning and moving mechanism 3, it includes a fixed plate 301 fixedly mounted on the worktable 1 and located on one side of the guide groove 2. The fixed plate 301 has an inverted L-shaped design, and its inner top wall contacts the top of the rotor without squeezing, so that the rotor will not move when the positioning pin is ejected. A moving plate 302 is provided on the worktable 1 on the other side of the guide groove 2. Multiple arc-shaped grooves are formed on the side of the moving plate 302 opposite to the fixed plate 301, and these grooves are equidistant from each other, allowing the moving plate 302 to better fit against the outer surface of the rotor and improve its fixing effect. A driving component is provided on the worktable 1 to drive the moving plate 302 to fix and move the rotor.

[0022] Regarding the design of the drive component, it includes drive shafts 303 rotatably mounted on the worktable 1. The outer surfaces of two drive shafts 303 are connected by a transmission component 304. The transmission component 304 includes pulleys fixedly mounted on the outer surfaces of the two drive shafts 303, and the two pulleys are connected by a belt drive, allowing the two drive shafts 303 to rotate synchronously. A cam 305 is fixedly mounted at the top of each drive shaft 303. A fixed rod 306 is rotatably mounted between the protrusion of the cam 305 and the moving plate 302. A drive motor 307 is fixedly mounted on the worktable 1 and electrically connected to an external power source. The output shaft of the drive motor 307 is fixedly connected to the end of one of the drive shafts 303 via a coupling. When the drive motor 307 is running, it drives the drive shaft 303 connected to it to rotate. The drive shaft 303 drives another drive shaft 303 to rotate synchronously through the transmission component 304. The drive shaft 303 drives the cam 305 to rotate. When the protrusion of the cam 305 rotates away from the fixed plate 301, the cam 305 pulls the moving plate 302 away from the fixed plate 301 through the fixed rod 306, and the fixed plate 301 disengages from the rotor. When the protrusion of the cam 305 rotates towards the fixed plate 301, it pushes the moving plate 302 towards the fixed plate 301 through the fixed rod 306, thereby squeezing the outer surface of the rotor and pushing the rotor to move towards one side of the guide plate, thereby driving the rotor to move towards the side of the guide plate in sequence, so that the assembled rotor falls onto the guide plate, and the unassembled rotor moves to the processing area in sequence. One of the rotors to be processed just coincides with the axis of one of the rotating shafts. Therefore, this position is the processing area.

[0023] Regarding the design of the rotating placement structure 4, the rotating placement structure 4 includes a rotating shaft 401 rotatably disposed inside the worktable 1. A rotating disk 402 is fixedly disposed at the top end of the rotating shaft 401. The edge of the rotating disk 402 extends outward to form an extension portion, which is slidably disposed with the inner wall of the worktable 1, effectively improving the stability of the rotating disk 402 during rotation. A placement cylinder 403 for placing the rotating shaft is slidably disposed inside the rotating disk 402. Preferably, there are eight placement cylinders 403, which are distributed in a circular array.

[0024] As a further technical solution, a baffle 404 is slidably disposed inside the placement cylinder 403, and a rotating shaft is located on the baffle 404. A connecting part 405 is slidably disposed on the outer surface of the placement cylinder 403, and the baffle 404 is fixedly connected to the connecting part 405. A stabilizing groove is formed through the inner wall of the placement cylinder 403, so that the connecting part 405 and the baffle 404 can move synchronously in the vertical direction. A connecting elastic member 406 is fixedly disposed on the outer surface of the placement cylinder 403, and one end of the connecting elastic member 406 is fixedly connected to the connecting part 405. The connecting elastic member 406 is a spring, and its elastic coefficient can be set according to requirements. When the ejector mechanism 5 pushes the baffle 404 upward, the baffle 404 drives the placement cylinder 403 upward through the connecting elastic component 406. The placement cylinder 403 moves upward until it is pressed against the bottom of the rotor and fits over the outside of the positioning pin. At this time, the placement cylinder 403 is blocked and cannot move. The baffle 404 continues to move upward, pushing the rotating shaft. The rotating shaft ejects the positioning pin. During the ejection of the positioning pin, the placement cylinder 403 first fits the positioning pin inside it, so that even if the force is too great during the ejection of the positioning pin, the contact point between the rotating shaft and the positioning pin will not shake, thus improving the stability of the rotor assembly process.

[0025] To illustrate, a sliding connection is fixedly provided on the outer surface of the placement cylinder 403. The outer surface of the sliding connection is slidably connected to the inner surface of the rotating disk 402, and the sliding connection prevents the placement cylinder 403 from detaching from the rotating disk 402. Therefore, when the connecting elastic member 406 is at its original length and is not subjected to external force, its top contacts the bottom of the rotating disk 402 without compression, and the placement cylinder 403 extends a certain distance onto the rotating disk 402.

[0026] Regarding the design of the ejection mechanism 5, the ejection mechanism 5 includes an ejection plate 501 slidably disposed inside the worktable 1. An ejection rod 502 is slidably disposed inside the worktable 1, with an ejection block 503 fixedly disposed at the top of the ejection rod 502. The diameters of both the ejection rod 502 and the ejection block 503 are smaller than the inner diameter of the placement cylinder 403, allowing them to move into the placement cylinder 403 to eject the positioning pin. The movement of the ejection plate 501 drives the ejection rod 502 to move the ejection block 503 in the vertical direction.

[0027] As a further technical solution, a stabilizing rod 504 is fixedly installed on the outer side of the ejector plate 501 and slidably disposed on the inner surface of the worktable 1. The interior of the ejector plate 501 is hollow, and inclined slots 505 are opened through both opposite sides of its inner wall. An extension column 506 is fixedly installed at the bottom of the outer side of the ejector rod 502, passing through the inclined slots 505. When the ejector plate 501 moves in the horizontal direction, the extension column 506 is pushed along its inner wall by the inclined slots 505, so that the extension column 506 pushes or pulls the ejector rod 502. The ejector rod 502 drives the ejector block 503 to move, so that the ejector block 503 can eject the rotor shaft upward. After ejecting the rotor shaft and completing the rotor assembly, it can be reset to the initial state, which is convenient for assembling the next rotor.

[0028] Regarding the design of the drive mechanism 6, the drive mechanism 6 includes a rotary motor 601 fixedly installed inside the worktable 1, and the rotary motor 601 is electrically connected to an external power source. A connecting shaft 602 is fixedly installed on the output shaft of the rotary motor 601 via a coupling. A drive disk 603 is fixedly installed at the bottom end of the connecting shaft 602. An eccentric shaft 604 is rotatably installed at the bottom of the drive disk 603, and the eccentric shaft 604 is rotatably located at the edge of the drive disk 603. A drive rod 605 is slidably installed inside the worktable 1. The bottom end of the eccentric shaft 604 extends into and slides with the drive rod 605. A drive groove is formed at the top of the drive rod 605, and the bottom end of the eccentric shaft 604 extends into and slides with it. A connecting rod 606 is fixedly installed between the drive rod 605 and the ejector plate 501. A connecting transmission component is installed between the connecting shaft 602 and the rotary shaft 401. When the rotary motor 601 is running, it drives the connecting shaft 602 to rotate. The connecting shaft 602 drives the drive disk 603 to rotate. The drive disk 603 drives the eccentric shaft 604 to perform circular motion, so that the eccentric shaft 604 drives the drive rod 605 to move back and forth in the horizontal direction, thereby driving the ejector plate 501 to move in the horizontal direction through the connecting rod 606.

[0029] Regarding the design of the connecting transmission components, the connecting transmission components include a transmission gear 607 fixedly mounted on the outer surface of the rotating shaft 401. A first limiting disk 608 is fixedly mounted on the top of the transmission gear 607, and the edge of the first limiting disk 608 is recessed inward to form multiple limiting grooves. A drive gear 609 that meshes with the transmission gear 607 is fixedly mounted on the outer surface of the connecting shaft 602. The drive gear 609 is only partially provided with serrations, and the number of serrations on the drive gear 609 is one-eighth of the number of serrations on the transmission gear 607. This allows the transmission gear 607 to rotate forty-five degrees after the drive gear 609 rotates one revolution, thereby facilitating the rotation of the rotating shaft to the processing location sequentially. A second limiting disk 6010 that can limit the first limiting disk 608 is fixedly mounted on the top of the drive gear 609, and a rotating groove is opened on the outer side of the second limiting disk 6010. The rotation of the connecting shaft 602 simultaneously drives the drive gear 609 to rotate, causing the drive gear 609 to intermittently rotate the transmission gear 607. Each rotation of the drive gear 609 moves the next placement cylinder 403 directly beneath the rotor to be processed. Through the cooperation of the second limiting plate 6010 and the first limiting plate 608, when the drive gear 609 disengages from the transmission gear 607, the second limiting plate 6010 can limit the first limiting plate 608, effectively preventing its rotation and thus improving processing accuracy.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. The assembly process of an automotive starter motor rotor, characterized in that, Specifically, the following steps are included: S1. Place the shaftless rotor to be assembled on the assembly equipment; S2. Insert the locating pin into the shaft hole of the shaftless rotor; S3. Move the shaftless rotor so that it can move sequentially to the processing area, and position the shaftless rotor that has been moved to the processing area to prevent its position from shifting. S4. Insert the rotating shaft into the shaft hole of the shaftless rotor and push out the locating pin to complete the assembly of the shaftless rotor. The assembled rotor is removed from the equipment, and the next shaftless rotor to be assembled is moved to the processing area. The equipment in step S1 includes a workbench (1), the top of which is provided with a guide groove (2) with openings at both ends, wherein one end of the positioning pin passes through the guide groove (2), the workbench (1) is provided with a positioning and moving mechanism (3) for sequentially shifting and positioning the rotor, the workbench (1) is provided with a rotating placement structure (4) for placing the rotating shaft, and the workbench (1) is provided with an ejection mechanism (5) for ejecting the rotating shaft upwards, wherein the rotating placement structure (4) is driven to rotate intermittently by a driving mechanism (6), and the ejection mechanism (5) is driven to eject the rotating shaft at the same time; The rotating placement structure (4) includes a rotating shaft (401) rotatably disposed inside the workbench (1), a rotating disk (402) is fixedly disposed at the top of the rotating shaft (401), and a placement cylinder (403) for placing the rotating shaft is slidably disposed inside the rotating disk (402). A baffle (404) is slidably provided inside the placement cylinder (403), and a connecting part (405) is slidably provided on the outer surface of the placement cylinder (403). The baffle (404) is fixedly connected to the connecting part (405), and a connecting elastic member (406) is fixedly provided on the outer surface of the placement cylinder (403). One end of the connecting elastic member (406) is fixedly connected to the connecting part (405). When the ejector mechanism (5) ejects the rotating shaft, the bottom of the rotor is first squeezed by the placement cylinder (403) to press and fix it to prevent its position from shifting. At the same time, the end of the positioning pin is inserted into the placement cylinder (403), and then the baffle (404) pushes the rotating shaft to eject the positioning pin, thereby assisting in positioning the contact point between the rotating shaft and the positioning pin.

2. The assembly process of the automobile starter motor rotor according to claim 1, characterized in that: The positioning and moving mechanism (3) includes a fixed plate (301) fixedly mounted on the workbench (1) and located on one side of the guide groove (2), a moving plate (302) located on the other side of the guide groove (2) on the workbench (1), and a driving component that drives the moving plate (302) to fix the rotor and move it on the workbench (1).

3. The assembly process of the automobile starter motor rotor according to claim 2, characterized in that: The driving component includes a drive shaft (303) rotatably mounted on the worktable (1). The outer surfaces of the two drive shafts (303) are connected by a transmission component (304). A cam (305) is fixedly mounted on the top end of the drive shaft (303). A fixed rod (306) is rotatably mounted between the protrusion of the cam (305) and the moving plate (302). A drive motor (307) is fixedly mounted on the worktable (1). The output shaft of the drive motor (307) is fixedly connected to the end of one of the drive shafts (303) through a coupling.

4. The assembly process of the automobile starter motor rotor according to claim 1, characterized in that: The ejection mechanism (5) includes an ejection plate (501) slidably disposed inside the worktable (1), an ejection rod (502) slidably disposed inside the worktable (1), and an ejection block (503) fixedly disposed at the top of the ejection rod (502). When the ejection plate (501) moves, it drives the ejection rod (502) to move the ejection block (503) in the vertical direction.

5. The assembly process of the automobile starter motor rotor according to claim 4, characterized in that: The outer side of the ejector plate (501) is fixedly provided with a stabilizing rod (504) that slides on the inner surface of the workbench (1). The interior of the ejector plate (501) is hollow, and inclined grooves (505) are opened through both sides of its inner wall. An extension column (506) that passes through the inclined groove (505) is fixedly provided at the bottom of the outer side of the ejector rod (502).

6. The assembly process of the automobile starter motor rotor according to claim 4, characterized in that: The drive mechanism (6) includes a rotary motor (601) fixedly installed inside the worktable (1). The output shaft of the rotary motor (601) is fixedly connected to a connecting shaft (602) via a coupling. A drive disk (603) is fixedly installed at the bottom end of the connecting shaft (602). An eccentric shaft (604) is rotatably installed at the bottom of the drive disk (603). A drive rod (605) is slidably installed inside the worktable (1). The bottom end of the eccentric shaft (604) extends into the drive rod (605) and slides therewith. A connecting rod (606) is fixedly installed between the drive rod (605) and the ejector plate (501). A connecting transmission component is installed between the connecting shaft (602) and the rotary shaft (401).

7. The assembly process of the automobile starter motor rotor according to claim 6, characterized in that: The connecting transmission component includes a transmission gear (607) fixedly disposed on the outer surface of the rotating shaft (401), a first limiting disk (608) fixedly disposed on the top of the transmission gear (607), a drive gear (609) meshing with the transmission gear (607) fixedly disposed on the outer surface of the connecting shaft (602), and a second limiting disk (6010) fixedly disposed on the top of the drive gear (609) for limiting the first limiting disk (608).

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