High-precision stator and rotor punching device and process for automotive window motor

Abstract

The present application relates to a high-precision stator and rotor punching device for an automotive window motor and its process. The high-precision stator and rotor punching device for an automotive window motor includes a machine body, an upper die base, and a lower die base located below the upper die base. The upper die base is slidably connected to the machine body in the vertical direction, and the upper die base is used to move downward and punch with the lower die base to form a stator and a rotor. A blower is provided on the machine body, and the blower is used to blow off the burrs attached to the upper die base. After the upper die base and the lower die base complete one stamping of the silicon steel sheet, the upper die base moves upward and prepares for the next stamping. At this time, the blower blows off the burrs attached to the upper die base, so that when the upper die base performs the next stamping, the burrs will not attach to the upper die base, and no indentations will appear on the formed stator and rotor, improving the installation accuracy during the lamination of the stator and rotor, and thus improving the accuracy of the motor.

Description

Technical Field

[0001] This application relates to the field of motor stators and rotors, and in particular to a high-precision stator and rotor punching device and process for automotive window motors. Background Art

[0002] Motor stators and rotors are devices used to achieve the mutual conversion between electrical energy and mechanical energy. The motor stator and rotor are formed by stamping a silicon steel sheet through a punching device, and at the same time, a rotor and a stator circumscribing the rotor are formed. The outer circumference of the rotor and the inner circumference of the stator are simultaneously formed with groove shapes for winding coils during stamping.

[0003] When the upper die of the punching device punches the silicon steel sheet, burrs will be generated on the stator and rotor. Some burrs are easily detached and attached to the upper die of the punching device. As a result, during the next stamping, the burrs will come into contact with the stator or rotor, leaving indentations on the stator and rotor. If such a stator and rotor are applied to a motor for controlling the lifting and lowering of automotive windows, it will affect the subsequent lamination of the stator and rotor, resulting in poor motor accuracy, and thus the window start and stop cannot be well controlled, affecting the use of personnel. Summary of the Invention

[0004] In order to improve the accuracy of the motor, this application provides a high-precision stator and rotor punching device and process for automotive window motors.

[0005] In a first aspect, this application provides a high-precision stator and rotor punching device for automotive window motors, adopting the following technical solution:

[0006] A high-precision stator and rotor punching device for automotive window motors includes a machine body, an upper die holder, and a lower die holder located below the upper die holder. The upper die holder is slidably connected to the machine body in the vertical direction, and the upper die holder is used to move downward and punch with the lower die holder to form a stator and a rotor. A blower is provided on the machine body, and the blower is used to blow off the burrs attached to the upper die holder.

[0007] By adopting the above technical solution, after the upper die holder and the lower die holder complete one stamping of the silicon steel sheet, the upper die holder moves upward and is ready for the next stamping. At this time, the blower blows off the burrs attached to the upper die holder, so that when the upper die holder performs the next stamping, the burrs will not be attached to the upper die holder, ensuring that there are no indentations on the stamped stator and rotor, improving the installation accuracy during the lamination of the stator and rotor, and thus improving the accuracy of the motor.

[0008] Preferably, it further includes a driving mechanism disposed on the machine body. The driving mechanism is located on the end face of the machine body close to the lower die holder. The driving mechanism includes a rotating shaft, a clockwork spring and a pulling rope. The rotating shaft is horizontally arranged and rotatably connected to the machine body. The fan is coaxially connected to the rotating shaft. The clockwork spring is sleeved on the rotating shaft. Two ends of the clockwork spring are respectively fixed to the rotating shaft and the machine body. The pulling rope is wound around the rotating shaft. One end of the pulling rope is fixed to the rotating shaft. The other end of the pulling rope is used to connect to the upper die holder. And the winding direction of the pulling rope is opposite to the winding direction of the clockwork spring.

[0009] By adopting the above technical solution, during use, one end of the pulling rope can be tied to the upper die holder. When the upper die holder completes stamping and moves upward, the pulling rope is stretched. Then the pulling rope drives the rotating shaft to rotate. The rotation of the rotating shaft further drives the clockwork spring to tightly wind around the rotating shaft. When the upper die holder moves upward to a fixed position, the pulling rope is released. The elastic restoring force of the clockwork spring drives the rotating shaft to rotate. Then the fan rotates to blow off the burrs attached to the upper die holder. At the same time, the rotating shaft winds up the pulling rope. It can fix the orientation of the fan, so that the fan is started after the upper die holder completes stamping and moves to a determined position, enabling the fan to accurately blow off the burrs. At the same time, the mechanical energy of the upper die holder is used to store energy for the fan, saving energy.

[0010] Preferably, a hook ring is connected to the end of the pulling rope used to connect to the upper die holder. A pull rod is provided on the peripheral side of the upper die holder close to the lower die holder. One end of the pull rod is rotatably connected to the upper die holder. The other end of the pull rod is a pulling part. The rotation axis of the pull rod is horizontally arranged and perpendicular to the pull rod. When the upper die holder moves away from the lower die holder, the pulling part is higher than the axis of the pull rod and is used to pass through the hook ring and pull the hook ring away from the rotating shaft. When the pull rod moves to a position where the hook ring can no longer move away from the rotating shaft, the hook ring drives the pulling part to rotate to a position lower than the rotating shaft of the pull rod and disengages from the pull rod.

[0011] By adopting the above technical solution, during the upward movement of the upper die holder, when the pull rod passes through the hook ring, the pull rod passes through the hook ring, thereby stretching the pulling rope, eliminating the need for manual tying of the pulling rope to the upper die holder and realizing unmanned operation. After the upper die holder moves gradually closer to the fixed position, the pulling rope cannot be stretched further. Then the hook ring drives the pull rod to rotate and disengage from the pull rod. Then the rotating shaft winds up the pulling rope under the action of the elastic restoring force of the clockwork spring, and at the same time drives the fan to rotate to blow off the burrs. The purpose of automatically storing energy for the fan and winding up the pulling rope is achieved.

[0012] Preferably, it further includes a mortar board, which is located below the driving mechanism and is slidably connected to the machine body in the horizontal direction. A push rod is rotatably connected to one side of the mortar board, and the push rod is rotatably connected to the machine body. The rotational connection between the push rod and the machine body is higher than the rotational connection between the push rod and the mortar board. The rotational axes of the push rod are all horizontally arranged. A positive magnet is provided at the upper end of the push rod. The pulling part has magnetism. When the hook ring disengages from the pull rod, the pulling part approaches the positive magnet and pushes the positive magnet away. The push rod rotates and moves the mortar board directly below the upper die base.

[0013] By adopting the above technical solution, when the hook ring disengages from the pull rod, at this time, the pulling part rotates and faces the push rod, thereby driving the positive magnet away. The push rod rotates around its rotational connection with the machine body and drives the mortar board to move below the upper die base. The mortar board catches the burrs blown off by the blower, restricting the burrs from directly falling on the lower die base and saving the trouble of additional cleaning of the lower die base.

[0014] Preferably, a return torsion spring is provided on the pull rod. The return torsion spring is coaxial with the rotational axis of the pull rod and is used to drive the pulling part to rotate and is higher than the rotational axis of the pull rod.

[0015] By adopting the above technical solution, the pull rod after the hook ring rotates is reset by the return spring, so that when the upper die base completes stamping and rises next time, the pull rod can pass through the hook ring without manual resetting.

[0016] Preferably, a driving part is provided on the pulling part. The driving part has magnetism opposite to that of the pulling part. When the pulling part rotates above the rotational axis of the pull rod, the driving part is located on the side facing the push rod.

[0017] By adopting the above technical solution, after the pull rod is reset, the upper die base moves downward for the next stamping. During the movement, the driving part gradually approaches the positive magnet to attract the positive magnet to approach the driving part. The push rod rotates around its rotational connection with the machine body, and then the mortar board moves and moves away from directly below the upper die base, enabling the upper die base to move downward smoothly and stamp the silicon steel sheet. The automatic reset of the mortar board is realized.

[0018] Preferably, a guiding surface is provided on the mortar board. When the mortar board moves directly below the upper die base, the guiding surface is located on the side facing the upper die base, and the distance between the guiding surface and the upper die base gradually decreases as it approaches the axis of the upper die base.

[0019] By adopting the above technical solution, the burrs are blown onto the guiding surface and then slide down along the guiding surface, making it difficult for the burrs to reattach to the upper die base during the movement of the upper die base.

[0020] Preferably, a guiding groove extending in the vertical direction is provided on the body, and the hook ring is slidably connected to the wall of the guiding groove, and the wall of the guiding groove is used to limit the hook ring from disengaging in the horizontal direction.

[0021] By adopting the above technical solution, the guiding groove is used to keep the hook ring in the correct state, so that the pull rod can pass through the hook ring smoothly, thereby ensuring the normal use of the fan.

[0022] Preferably, the hook ring is made of an elastic material.

[0023] By adopting the above technical solution, during the downward movement of the pull rod, interference will occur between the pull rod and the hook ring. Due to the deformable characteristics of the material of the hook ring itself, the pull rod can move downward smoothly, and at the same time, the wear between the pull rod and the hook ring is reduced.

[0024] In a second aspect, the present application provides a punching process, adopting the following technical solution:

[0025] A punching process, applying the above-mentioned high-precision stator and rotor punching device for automotive window motors, includes the following steps carried out in sequence: placing the silicon steel sheet on the upper surface of the lower die base, moving the upper die base downward to press the silicon steel sheet, continuing to move the upper die base downward, and the forming convex block of the upper die base pushing the silicon steel sheet into the forming groove of the lower die base to complete the punching of the silicon steel sheet and obtain the motor rotor and stator.

[0026] By adopting the above technical solution, through the cooperation of the upper die base and the lower die base, the stator and rotor can be obtained in one punching.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the upper die base and the lower die base complete one punching of the silicon steel plate, the upper die base moves upward and is ready for the next punching. At this time, the fan blows off the burrs attached to the upper die base, so that when the upper die base performs the next punching, the burrs will not adhere to the upper die base, and no indentations will appear on the punched stator and rotor, improving the installation accuracy during the lamination of the stator and rotor, and thus improving the accuracy of the motor.

[0029] 2. During the upward movement of the upper die base, when the pull rod passes through the hook ring, the pull rod passes through the hook ring, thereby stretching the pull rope. There is no need to manually tie the pull rope to the upper die base, realizing unmanned operation. After the upper die base moves to gradually approach the fixed position, the pull rope cannot be stretched any further, and then the hook ring drives the pull rod to rotate and disengage from the pull rod. Then, under the elastic restoring force of the spiral spring, the rotating shaft winds up the pull rope, and at the same time drives the fan to rotate to blow off the burrs. The purpose of automatically storing energy for the fan and winding up the pull rope is achieved.

[0030] 3. Through the cooperation of the upper die base and the lower die base, the stator and rotor can be obtained in one punching. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0032] Figure 2 is a schematic diagram of the structure in one state of an embodiment of the present application.

[0033] Figure 3 is Figure 2 an enlarged view of part A in

[0034] Figure 4 is a schematic diagram of the structure in another state of an embodiment of the present application.

[0035] Description of the reference numerals: 1, body; 11, chute; 12, guiding groove; 13, push rod; 131, positive magnetic block; 2, upper die base; 21, pull rod; 211, pulling part; 212, driving part; 22, return spring; 3, lower die base; 4, power mechanism; 5, driving mechanism; 51, rotating shaft; 52, clockwork spring; 53, pulling rope; 54, hook ring; 6, ash tray; 61, guiding surface; 7, fan. Detailed Description of the Embodiment

[0036] The following further elaborates on the present application in conjunction with the attached Figures 1-4 drawings.

[0037] Referring to Figure 1 , an embodiment of the present application discloses a high-precision stator and rotor punching device for an automotive window motor, which includes a body 1, an upper die base 2, and a lower die base 3.

[0038] A vertically downwardly penetrating chute 11 is provided on the body 1, and the upper die base 2 is disposed in the chute 11 and moves vertically. The lower die base 3 is located directly below the chute 11 and there is a gap between the lower die base 3 and the end of the lower end opening of the chute 11. The upper end surface of the lower die base 3 is used for placing the silicon steel sheet. A power mechanism 4 for driving the upper die base 2 to reciprocate vertically is provided on the body 1. The power mechanism 4 drives the upper die base 2 to move downward and extend out of the chute 11, so that the upper die base 2 approaches the lower die base 3, and the upper die base 2 and the lower die base 3 cooperate with each other to punch the silicon steel sheet to form a stator and a rotor.

[0039] Referring to Figure 2 , a high-precision stator and rotor punching device for an automotive window motor further includes a driving mechanism 5 and an ash tray 6.

[0040] Referring to Figure 3, the driving mechanism 5 includes a rotating shaft 51, a clockwork spring 52, and a pulling rope 53. One end of the rotating shaft 51 is rotatably connected to the machine body 1. The other end of the rotating shaft 51 is higher than one end of the rotating shaft 51 and faces the sliding groove 11, and the rotating shaft 51 is close to the notch of the sliding groove 11. A blower 7 is provided on the machine body 1. The blower 7 is fixedly connected to the rotating shaft 51 and is coaxial with the rotating shaft 51. When the upper die holder 2 moves upward until it can no longer move, the air outlet of the blower 7 faces the lower end of the upper die holder 2.

[0041] The clockwork spring 52 is sleeved on the rotating shaft 51. One end of the clockwork spring 52 is fixedly connected to the rotating shaft 51, and the other end of the clockwork spring 52 is fixedly connected to the machine body 1. One end of the pulling rope 53 is fixedly connected to the rotating shaft 51. The pulling rope 53 is wound around the rotating shaft 51, and the winding direction of the pulling rope 53 is opposite to the winding direction of the clockwork spring 52. The other end of the pulling rope 53 is fixedly connected with a hook ring 54. The hook ring 54 is made of an elastic material such as rubber or silica gel. In this embodiment, the hook ring 54 is made of rubber material.

[0042] A guiding groove 12 extending in the vertical direction is provided on the groove wall of the sliding groove 11. The width of the notch of the guiding groove 12 is smaller than the width of the bottom of the guiding groove 12, and the guiding groove 12 is provided as a T-shaped groove. The hook ring 54 is slidably inserted into the guiding groove 12, and the groove wall of the guiding groove 12 is used to limit the hook ring 54 from disengaging in the horizontal direction. The extending length of the guiding groove 12 is greater than the length of the pulling rope 53.

[0043] Refer to Figure 3 , a pull rod 21 is provided on the periphery of the upper die holder 2. One end of the pull rod 21 is rotatably connected to the upper die holder 2. The other end of the pull rod 21 is provided as a pulling part 211. The rotation axis of the pull rod 21 is horizontally arranged and perpendicular to the pull rod 21. The pulling part 211 is used to extend into the guiding groove 12 and pass through the hook ring 54. A return spring 22 is provided at one end of the pull rod 21 away from the pulling part 211. The return spring 22 is coaxial with the rotation axis of the pull rod 21, and the return spring 22 is used to drive the pull rod 21 to rotate so that the pulling part 211 is higher than the rotation axis of the pull rod 21. The pulling part 211 is made of iron to make it magnetic.

[0044] Refer to Figure 4 , a push rod 13 is rotatably connected to the machine body 1. The ash tray 6 is rotatably connected to the lower end of the push rod 13. The rotation axes of the push rod 13 are all horizontally arranged and away from both ends of the push rod 13. A positive magnetic block 131 is provided at the upper end of the push rod 13. The magnetism of the push rod 13 is the same as that of the pulling part 211. The ash tray 6 is horizontally arranged. The ash tray 6 is slidably connected to the machine body 1 in the horizontal direction and is located below the sliding groove 11, and the ash tray 6 is used to block the notch of the sliding groove 11. The end of the push rod 13 rotatably connected to the ash tray 6 is a telescopic rod.

[0045] A guide surface 61 is provided on the side of the ash supporting plate 6 facing away from the lower die base 3 . When the guide surface 61 moves to the notch of the slide groove 11 , the distance between the guide surface 61 and the upper die base 2 gradually decreases as it approaches the axis of the upper die base 2 .

[0046] The pulling part 211 is fixedly connected to a driving part 212 ( Figure 3 The driving part 212 is made of iron to make it magnetic, and the magnetism of the driving part 212 is opposite to that of the pulling part 211. When the pull rod 21 rotates until the pulling part 211 is higher than the rotation axis of the pull rod 21, the driving part 212 is located on the side facing the pull rod 21.

[0047] When the upper die holder 2 moves upward until it cannot move further, the pull rod 21 rotates to the pulling portion 211 ( Figure 3 When the pull portion 211 ( Figure 3 center) toward the positive magnetic block 131.

[0048] When the pull rod 21 rotates under the action of the return spring 22 and the pulling portion 211 rotates to be higher than the rotation axis of the pull rod 21 , the driving portion 212 faces the push rod 13 .

[0049] The implementation principle of a high-precision stator and rotor punching device for a car window motor in the embodiment of the present application is as follows:

[0050] When the upper mold base 2 rises, the pulling portion 211 extends into the guide groove 12 and into the hook ring 54, and then the hook ring 54 is pulled upward, the pull rope 53 is lengthened, the rotating shaft 51 rotates and tightens the clockwork spring 52, and when the upper mold base 2 moves upward until it can no longer move, the hook ring 54 drives the pull rod 21 to rotate so that the pulling portion 211 rotates to be lower than the rotation axis of the pull rod 21, and then the hook ring 54 disengages from the pull rod 21, and the rotating shaft 51 rotates under the elastic restoring force of the clockwork spring 52. The rotation of the rotating shaft 51 drives the fan 7 to rotate to blow off the burrs attached to the upper mold base 2, and at the same time, the rotating shaft 51 reels the pull rope 53.

[0051] When the pulling part 211 rotates to below the rotation axis of the pull rod 21, the pulling part 211 faces the positive magnetic block 131, and the same magnetic poles repel each other, so that the positive magnetic block 131 moves away from the pulling part 211, and the push rod 13 rotates around the rotation axis between itself and the body 1, so that the push rod 13 pushes the ash supporting plate 6 to slide horizontally to the lower end notch of the slide groove 11, and the ash supporting plate 6 receives the burrs blown off, so that the burrs will not fall into the lower mold base 3.

[0052] Meanwhile, the reset spring 22 drives the pull rod 21 to rotate, causing the pulling portion 211 to rotate and be above the axis of rotation of the pull rod 21. At this time, the driving portion 212 faces the positive magnetic block 131. When the upper die base 2 moves downward, when the driving portion 212 moves closer to the positive magnetic block 131, the magnetic poles with different polarities attract each other. As a result, the positive magnetic block 131 approaches the pulling portion 211, and the push rod 13 rotates around its axis of rotation with the machine body 1. Thus, the push rod 13 pushes the ash tray 6 to slide horizontally away from the lower end opening of the chute 11, preventing the ash tray 6 from interfering with the downward movement of the upper die base 2.

[0053] When the upper die base 2 moves downward and approaches the hook ring 54, since the hook ring 54 can deform, the pull rod 21 can move downward smoothly and be inserted into the hook ring 54. At this time, the upper die base 2 moves downward until it can no longer move, and the upper die base 2 and the lower die base 3 complete the stamping of the silicon steel sheet to form the stator and rotor.

[0054] The embodiment of the present application also discloses a punching process. By applying the above-mentioned high-precision stator and rotor punching device for automotive window motors, the punching process includes the following steps carried out in sequence: placing the silicon steel sheet on the upper surface of the lower die base 3, moving the upper die base 2 downward to press the silicon steel sheet, and then continuing to move the upper die base 2 downward. The forming protrusion of the upper die base 2 pushes the silicon steel sheet into the forming groove of the lower die base 3 to complete the stamping of the silicon steel sheet and obtain the rotor and stator.

[0055] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-precision stator and rotor punching device for an automotive window motor, characterized in that: It includes a machine body, an upper die base, and a lower die base located below the upper die base. The upper die base is slidably connected to the machine body in the vertical direction, and the upper die base is used to move downward and punch with the lower die base to form a stator and a rotor. A blower is provided on the machine body, and the blower is used to blow off the burrs attached to the upper die base. It also includes a driving mechanism provided on the machine body. The driving mechanism is located on the end face of the machine body close to the lower die base. The driving mechanism includes a rotating shaft, a spiral spring, and a pull rope. The rotating shaft is horizontally arranged and rotatably connected to the machine body. The blower is coaxially connected to the rotating shaft. The spiral spring is sleeved on the rotating shaft. Two ends of the spiral spring are respectively fixed to the rotating shaft and the machine body. The pull rope is wound around the rotating shaft. One end of the pull rope is fixed to the rotating shaft, and the other end of the pull rope is used to connect to the upper die base. And the winding direction of the pull rope is opposite to the winding direction of the spiral spring. One end of the pull rope used to connect to the upper die base is connected with a hook ring. A pull rod is provided on the circumferential side of the upper die base close to the lower die base. One end of the pull rod is rotatably connected to the upper die base. The other end of the pull rod is set as a pulling part. The rotation axis of the pull rod is horizontally arranged and perpendicular to the pull rod. When the upper die base moves away from the lower die base, the pulling part is higher than the axis of the pull rod and is used to pass through the hook ring and pull the hook ring away from the rotating shaft. When the pull rod moves to a position where the hook ring can no longer move away from the rotating shaft, the hook ring drives the pulling part to rotate to a position lower than the rotating shaft of the pull rod and detach from the pull rod. It also includes an ash tray. The ash tray is located below the driving mechanism and is slidably connected to the machine body in the horizontal direction. A push rod is rotated on one side of the ash tray. The push rod is rotatably connected to the machine body. The rotation connection position of the push rod and the machine body is higher than the rotation connection position of the push rod and the ash tray. The rotation axes of the push rod are all horizontally arranged. A positive magnet is provided at the upper end of the push rod. The pulling part has magnetism. When the hook ring detaches from the pull rod, the pulling part approaches the positive magnet and pushes the positive magnet away. The push rod rotates and moves the ash tray to directly below the upper die base.

2. The high-precision stator and rotor punching device for automotive window motors according to claim 1, characterized in that: A reset torsion spring is provided on the pull rod. The reset torsion spring is coaxial with the rotation axis of the pull rod and is used to drive the pulling part to rotate and be higher than the rotation axis of the pull rod.

3. The high-precision stator and rotor punching device for automotive window motors according to claim 2, characterized in that: A driving part is provided on the pulling part. The driving part has magnetism opposite to that of the pulling part. When the pulling part rotates to a position higher than the rotation axis of the pull rod, the driving part is located on the side facing the push rod.

4. The high-precision stator and rotor punching device for automotive window motors according to claim 1, characterized in that: A guiding surface is provided on the ash tray. When the ash tray moves to directly below the upper die base, the guiding surface is located on the side facing the upper die base. The distance between the guiding surface and the upper die base gradually decreases as it approaches the axis of the upper die base.

5. The high-precision stator and rotor punching device for automotive window motors according to claim 1, wherein: A guiding groove extending in the vertical direction is provided on the machine body. The hook ring is slidably connected to the groove wall of the guiding groove. The groove wall of the guiding groove is used to limit the hook ring from detaching in the horizontal direction.

6. The high-precision stator and rotor punching device for automotive window motors according to claim 1, characterized in that: The hook ring is made of an elastic material.

7. A punching process, applying the high-precision stator and rotor punching device for automotive window motors according to any one of claims 1-6, characterized in that: It includes the following steps carried out in sequence: Place the silicon steel sheet on the upper surface of the lower die base. The upper die base moves downward and presses the silicon steel sheet. The upper die base continues to move downward. The forming convex block of the upper die base pushes the silicon steel sheet into the forming groove of the lower die base to complete the stamping of the silicon steel sheet and obtain the motor rotor and stator.

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