A car door actuator and its usage method

Abstract

This invention discloses an automotive door actuator and its usage method, including a drive mechanism, a front pulley structure, and a rear pulley structure. The drive mechanism includes a main housing, a drive motor, a worm, a worm wheel, and a winding wheel. The worm and worm wheel are connected by a transmission connection, and the output shaft of the drive motor is fixedly connected to the worm through a buffer and shock-absorbing structure. The winding wheel has a helical winding groove, around which a first cable and a second cable are wound. An electromagnetic clutch is provided in the inner cavity of the winding wheel. The electromagnetic clutch includes an electromagnetic shaft, an electromagnetic stator, an electromagnetic rotor, and an electromagnetic armature. The electromagnetic shaft is coaxially fixed to the worm wheel, and the electromagnetic rotor is coaxially fixed to the electromagnetic shaft. The electromagnetic stator is fixedly connected to the main housing through a fixing plate. The electromagnetic armature is engaged with the winding wheel to prevent rotation through a positioning structure. An elastic reset element is provided between the electromagnetic rotor and the electromagnetic armature. This design offers good buffering and shock absorption, and a long service life.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and in particular to an automotive door actuator and its usage method. Background Technology

[0002] With the development of the times and the improvement of living standards, cars with sliding doors have gradually become more popular, especially for commercial vehicles and MPVs. To meet people's demand for intelligence and automation, many sliding doors now use automated drive mechanisms to automatically open and close the doors. Because there are many types of vehicles available, each car model has a different structure.

[0003] A common problem with existing automotive door drive mechanisms is that the motor output shaft and worm gear are directly connected for transmission. The torque generated by the motor output shaft acts directly on the worm gear. After long-term use, the connection between the worm gear and the motor output shaft will deform due to the torque, affecting the concentricity of the worm gear rotation and even causing the worm gear and worm wheel to jam. This needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide an automotive door actuator and its usage method, which has the effects of good buffering and shock absorption and long service life.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automobile door actuator, comprising a drive mechanism, a front pulley structure and a rear pulley structure, wherein the drive mechanism comprises a main housing, a drive motor and a worm, a worm wheel and a winding wheel disposed inside the main housing, wherein the worm is drivenly connected to the worm wheel, and the output shaft of the drive motor is fixedly connected to the worm through a buffer and shock absorption structure; The outer wall of the winding wheel is provided with a spiral winding groove, and a first cable is wound around the spiral winding groove. The drive mechanism and the front pulley structure are connected by the first cable. A second cable is wound around the spiral winding groove, and the drive mechanism and the rear pulley structure are connected by the second cable. The winding directions of the first cable and the second cable are opposite. An electromagnetic clutch is provided in the inner cavity of the winding reel. The electromagnetic clutch includes an electromagnetic shaft, an electromagnetic stator, an electromagnetic rotor, and an electromagnetic armature. The electromagnetic rotor is located between the electromagnetic stator and the electromagnetic armature. The electromagnetic shaft is coaxially fixed to the worm gear, and the electromagnetic rotor is coaxially fixed to the electromagnetic shaft. The electromagnetic stator is fixedly connected to the main housing through a fixing plate. The electromagnetic stator is electrically connected to a power connector. The electromagnetic armature is anti-rotating with the winding reel through a positioning structure. An elastic reset member is provided between the electromagnetic rotor and the electromagnetic armature axially. When the electromagnetic stator is energized, it generates magnetism, and the electromagnetic armature is attracted to the electromagnetic rotor. The driving mechanism drives the electromagnetic rotor to rotate, and the electromagnetic rotor drives the winding reel to rotate in the same direction through the electromagnetic armature.

[0006] By adopting the above technical solution, the output shaft of the drive motor drives the worm to rotate synchronously through the buffer and shock absorption structure. The worm drives the electromagnetic shaft to rotate through the worm wheel, and the electromagnetic shaft drives the electromagnetic rotor to rotate. At this time, the electromagnetic stator is energized through the power plug and magnetism is generated, causing the electromagnetic armature to be attracted towards the electromagnetic stator. At this time, the elastic reset element is compressed and accumulates elastic potential energy. Since the electromagnetic rotor is located between the electromagnetic stator and the electromagnetic armature, the electromagnetic armature will be tightly attached to the electromagnetic rotor. When the electromagnetic rotor rotates, due to the friction between the end faces of the electromagnetic armature and the electromagnetic rotor, the electromagnetic rotor carries the electromagnetic armature to rotate together, thereby driving the winding wheel fixed to the electromagnetic armature to rotate. When the winding wheel rotates, it will drive the first cable and the second cable to rotate. The cable is wound and unwound in the spiral winding groove to control the opening and closing of the car door. When the car door is fully open or closed, the electromagnetic stator is de-energized, causing it to de-adhere to the electromagnetic armature. The elastic reset component releases its elastic potential energy and pushes the electromagnetic armature away from the electromagnetic rotor to reset, preventing damage caused by excessive opening or closing of the car door. This invention uses a buffer and shock absorption structure between the drive motor output shaft and the worm gear for transition. The buffer and shock absorption structure can effectively prevent the torque generated between the drive motor output shaft and the worm gear due to the speed difference during deceleration or acceleration, which could cause twisting deformation at the connection between the drive motor output shaft and the worm gear. This gives the invention good buffer and shock absorption performance and a long service life.

[0007] A further configuration of the present invention is as follows: the buffer and shock absorption structure is a flexible connector; a fastener is coaxially fixed at the end of the output shaft of the drive motor; an insertion part is provided at the end of the worm gear; a slot is provided in the middle of the flexible connector corresponding to the insertion part; the insertion part is inserted into the slot for positioning; clamping parts are symmetrically provided on both sides of the fastener; positioning holes are symmetrically provided on both sides of the slot of the flexible connector; the clamping parts are inserted into the corresponding positioning holes for positioning; and when the fastener is fixedly connected to the worm gear through the flexible connector, the clamping parts on both sides are anti-rotationally engaged with the insertion part.

[0008] By adopting the above technical solution, the flexible connector acts as a transition piece to fill the gap between the clamping part and the insertion part, preventing abnormal noise caused by gaps between the fastener and the end of the worm. At the same time, the flexible connector can also play a sealing role, improving the connection reliability between the fastener and the end of the worm. It can also play a shock absorption and buffering role for the torque generated at the connection between the drive motor output shaft and the worm, preventing deformation of the connection due to torque.

[0009] A further configuration of the present invention is as follows: the buffer and shock absorption structure includes a shock absorption sleeve and a flexible shock absorption component; a fastener is coaxially fixed at the output shaft end of the drive motor; both the fastener and the outer wall of the worm end are provided with spline portions; spline mating grooves are opened at both ends of the shock absorption sleeve corresponding to the spline portions; the spline portions of the fastener and the worm are anti-rotationally connected to the corresponding spline mating grooves through the flexible shock absorption component.

[0010] By adopting the above technical solution, a flexible damping element is set in the spline groove at each end of the damping sleeve. Then, the splined parts of the fastener and the worm are respectively inserted into the spline groove at both ends of the damping sleeve to prevent rotation. A flexible damping element is correspondingly and sealed between the splined part of the fastener and the spline groove at one end of the damping sleeve, and between the splined part of the worm and the spline groove at the other end of the damping sleeve for transition. The buffering capacity of the flexible damping element is used to buffer the inertial torque between the output shaft of the drive motor and the worm, which plays a good protective role for the drive motor and can effectively prevent the connection between the output shaft of the drive motor and the worm from deforming due to torque.

[0011] A further configuration of the present invention is as follows: the positioning structure includes an anti-rotation groove and an anti-rotation part; the electromagnetic armature is movably sleeved on the electromagnetic shaft; the anti-rotation part protrudes from the winding wheel; the anti-rotation groove is formed on the electromagnetic armature corresponding to the anti-rotation part; and the anti-rotation part is positioned to prevent rotation by corresponding to the anti-rotation groove.

[0012] By adopting the above technical solution, unlike the traditional method of connecting the electromagnetic armature and the winding wheel by welding, the separate design of the electromagnetic armature facilitates the assembly of the electromagnetic armature on the winding wheel, and also reduces the operation process of welding the electromagnetic armature on the winding wheel, thus saving costs.

[0013] A further feature of the present invention is that the two ends of the electromagnetic shaft are rotatably connected to the main housing via a first bearing.

[0014] By adopting the above technical solution, the addition of the first bearing can improve the smoothness of the electromagnetic shaft rotation in the main housing, and at the same time, it can also reduce noise during the operation of the equipment.

[0015] A further provision of the present invention is that a Hall magnetic ring is fixed on the winding reel, and a Hall sensor electrically connected to the stroke counting module is provided on the main housing, wherein the Hall sensor and the Hall magnetic ring are inductively coupled.

[0016] By adopting the above technical solution, when the drive mechanism drives the winding wheel to rotate forward or backward, it will drive the Hall magnetic ring to rotate synchronously. The Hall sensor senses the rotation of the Hall magnetic ring and feeds back the data of the number of rotations of the winding wheel to the stroke counting module. The stroke counting module is used to read the opening and closing position of the car door in real time.

[0017] A further feature of the present invention is that the main housing has a sliding cavity, and the sliding cavity has two sets of symmetrically arranged elastic damping structures. The elastic damping structure includes an elastic element and a first roller. A sliding seat is slidably provided in the sliding cavity. The first roller is rotatably connected to the sliding seat. The first cable and the second cable are linked and reversed with the corresponding first roller. The elastic element always has a tendency to drive the first rollers on both sides to move away from each other.

[0018] By adopting the above technical solution, when the drive mechanism drives the winding wheel to rotate, the first cable and the second cable will exert an inward squeezing force on the first rollers on both sides. The symmetrically arranged elastic damping structure plays an elastic tensioning role on the first cable and the second cable, so that the first cable and the second cable always remain taut during the pulling of the car door. At the same time, the elastic damping structure can also effectively prevent the first cable and the second cable from playing a stress buffering role during the pulling of the car door, preventing the first cable and the second cable from breaking due to excessive instantaneous tension.

[0019] A further configuration of the present invention is as follows: a fixing plate is fixedly provided on the main housing, the fixing plate and the main housing are fastened together to form the sliding cavity, the main housing is provided with a slide channel communicating with the sliding cavity, the sliding seat is provided with a sliding part corresponding to the slide channel, and the sliding part is guided and cooperated with the slide channel.

[0020] By adopting the above technical solution, the sliding direction of the sliding seat in the sliding cavity is more consistent, thereby enabling the elastic elements on both sides to produce linear elastic deformation, making the buffer force distribution of the elastic damping structure of the present invention on the first cable and the second cable more uniform, and preventing the sliding seat from accidentally getting stuck in the sliding cavity.

[0021] A further configuration of the present invention is as follows: both the front pulley structure and the rear pulley structure include a foot clamping housing assembly through which the first cable or the second cable passes, and a second roller is rotatably disposed within the foot clamping housing assembly, wherein the first cable, the second cable and the corresponding second roller are linked and reversed.

[0022] By adopting the above technical solution, the second roller is fixed to the car through the clamping foot housing assembly, and the first cable and the second cable are linked and reversed through the corresponding second roller. The setting of the second roller improves the smoothness of the reversal of the first cable and the second cable.

[0023] Another technical objective of this invention is to provide a method for using an automotive door actuator, characterized by comprising the following steps: S1: The drive motor starts, and its output shaft drives the worm gear to rotate synchronously through the buffer and shock absorption structure; S2: The worm drives the worm wheel to rotate, the worm wheel drives the electromagnetic shaft to rotate, and the electromagnetic shaft drives the electromagnetic rotor to rotate. S3: By connecting the power plug, the electromagnetic stator is energized, making it magnetic. The electromagnetic armature is attracted towards the electromagnetic stator. Since the electromagnetic rotor is located between the electromagnetic stator and the electromagnetic armature, the electromagnetic armature will be tightly attached to the electromagnetic rotor. When the electromagnetic rotor rotates, due to the friction between the end faces of the electromagnetic armature and the electromagnetic rotor, the electromagnetic rotor rotates with the electromagnetic armature, thereby driving the winding wheel fixed to the electromagnetic armature to rotate. S4: The winding wheel rotates, driving the corresponding first and second cables to release or retract wires in the spiral winding groove, thereby opening or closing the car door.

[0024] In summary, the present invention has the following beneficial effects: 1. A buffer and shock-absorbing structure is used for transition between the output shaft of the drive motor and the worm gear. The buffer and shock-absorbing structure can play a role in buffering and shock absorption, and can effectively prevent the torque generated between the output shaft of the drive motor and the worm gear due to the speed difference during the deceleration or acceleration of the drive motor output shaft, which would cause twisting deformation at the connection between the output shaft of the drive motor and the worm gear. It has the effects of good buffering and shock absorption and long service life.

[0025] 2. A sliding cavity is opened in the main shell, and two sets of symmetrically arranged elastic damping structures are installed in the sliding cavity. When the drive mechanism drives the winding wheel to rotate, the first cable and the second cable will generate an inward squeezing force on the first rollers on both sides. The symmetrically arranged elastic damping structures play an elastic tensioning role on the first cable and the second cable, so that the first cable and the second cable remain taut during the pulling of the door. At the same time, the elastic damping structure can also effectively prevent the first cable and the second cable from playing a stress buffering role during the pulling of the door, preventing the first cable and the second cable from breaking due to excessive instantaneous tension.

[0026] 3. The output shaft of the drive motor drives the worm gear to rotate synchronously through a buffer and shock absorption structure. The worm gear drives the electromagnetic shaft to rotate through the worm wheel, and the electromagnetic shaft drives the electromagnetic rotor to rotate. At the same time, the electromagnetic stator is energized, and the electromagnetic rotor moves by cutting the magnetic field and becomes magnetic, attracting the electromagnetic armature to rotate synchronously on the electromagnetic rotor. Since the electromagnetic armature and the winding wheel are anti-rotationally coupled, the winding wheel is driven to rotate in the same direction. When the winding wheel rotates, it drives the first and second cables to take in and release the wire in the spiral winding groove, thereby controlling the opening or closing of the car door, which has the effect of automatically controlling the opening and closing of the car door.

[0027] 4. A Hall magnetic ring is fixed on the winding wheel, and a Hall sensor electrically connected to the stroke counting module is used to sense the rotation of the Hall magnetic ring and feed back the number of rotations of the winding wheel to the stroke counting module to determine the effect of the opening and closing position of the car door in real time. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the present invention.

[0029] Figure 2 This is a side view of a specific embodiment of the present invention.

[0030] Figure 3 This is the present invention. Figure 2 A sectional view of section AA in the middle.

[0031] Figure 4 This is the present invention. Figure 3 A magnified view of a portion of region B in the middle.

[0032] Figure 5 This is an exploded view of the drive motor, fastener, flexible connector and worm gear in a specific embodiment of the present invention.

[0033] Figure 6 This is a top view of the present invention.

[0034] Figure 7 This is the present invention. Figure 6 A sectional view of section CC.

[0035] Figure 8 This is a cross-sectional view of the present invention at the location of the elastic damping structure.

[0036] Figure 9 This is an exploded view of the clamp housing assembly of the present invention.

[0037] Figure 10 This is an exploded view of the driving mechanism of the present invention.

[0038] Figure 11 This is an exploded view of the driving mechanism of the present invention from another perspective.

[0039] Figure 12 This is a longitudinal sectional view along the axial direction of the worm gear in a specific embodiment of the present invention.

[0040] Figure 13 This is an exploded view of the drive motor, shock absorber sleeve, flexible shock absorber and worm gear in a specific embodiment of the present invention.

[0041] In the diagram: 1. Main housing; 1a. Sliding cavity; 1b. Slide rail; 11. Upper cover; 12. Lower cover; 13. Fixing plate; 131. Buffer pad; 14. Elastic element; 15. First roller; 16. Sliding seat; 161. Sliding part; 2. Drive motor; 21. Fastener; 211. Clamping part; 212. Bushing; 213. Spline part; 22. Flexible connector; 22a. Slot; 22b. Positioning hole; 23. Shock-absorbing sleeve; 23a. Spline mating groove; 231. Flexible shock absorber; 3. Worm gear; 31. Insertion part; 32. Second bearing; 321. Snap ring; 4. Worm wheel; 5. Winding wheel; 50 5a. Anti-rotation part; 51. Helical winding groove; 52. First cable; 53. Second cable; 54. Hall sensor; 55. Hall magnetic ring; 56. Anti-wear sleeve; 57. Card holder; 68. Electromagnetic clutch; 69. Electromagnetic shaft; 60. First bearing; 61. Electromagnetic stator; 62. Power connector; 63. Electromagnetic rotor; 64. Electromagnetic armature; 65. Anti-rotation groove; 76. Front pulley structure; 71. Card foot housing assembly; 71.11. Base; 71.11a. Buckle; 71.12. Top cover; 71.12a. Card slot; 71.2. Second roller; 72. Rear pulley structure; 8. Elastic reset component. Detailed Implementation

[0042] The invention will now be further described with reference to the accompanying drawings. Specific Implementation Example 1 A car door actuator and its usage method, such as Figure 1-4As shown, the device includes a drive mechanism, a front pulley structure 71, and a rear pulley structure 72. The drive mechanism includes a main housing 1, a drive motor 2, and a worm 3, a worm wheel 4, and a winding wheel 5 disposed inside the main housing 1. The main housing 1 includes an upper cover 11 and a lower cover 12. The worm 3 and the worm wheel 4 are connected by a drive mechanism, and the output shaft of the drive motor 2 is fixedly connected to the worm 3 through a buffer and shock-absorbing structure. In this embodiment, the buffer and shock-absorbing structure is a flexible connector 22. The outer wall of the winding wheel 5 has a spiral winding groove 5a, and a first cable 51 is wound around the spiral winding groove 5a. The drive mechanism and the front pulley structure 71 are connected by the first cable 51. A second cable 52 is wound around the spiral winding groove 5a, and the drive mechanism and the rear pulley structure 72 are connected by the second cable 52. The winding directions of the first cable 51 and the second cable 52 are the same. Conversely, an electromagnetic clutch 6 is provided in the inner cavity of the winding wheel 5. The electromagnetic clutch 6 includes an electromagnetic shaft 61, an electromagnetic stator 62, an electromagnetic rotor 63, and an electromagnetic armature 64. The electromagnetic rotor 63 is located between the electromagnetic stator 62 and the electromagnetic armature 64. The electromagnetic shaft 61 is coaxially fixed with the worm gear 4, and the electromagnetic rotor 63 is coaxially fixed on the electromagnetic shaft 61. The electromagnetic stator 62 is fixedly connected to the main housing 1 through a fixing plate 13. The electromagnetic stator 62 is electrically connected to a power connector 621. The electromagnetic armature 64 is engaged with the winding wheel 5 to prevent rotation through a positioning structure. An elastic reset member 8 is provided between the electromagnetic rotor 63 and the electromagnetic armature 64. When the electromagnetic stator 62 is energized, it generates magnetism, and the electromagnetic armature 64 is attracted to the electromagnetic rotor 63. The drive mechanism drives the electromagnetic rotor 63 to rotate, and the electromagnetic rotor 63 drives the winding wheel 5 to rotate in the same direction through the electromagnetic armature 64.

[0044] like Figure 3-5As shown, a fastener 21 is coaxially fixed to the end of the output shaft of the drive motor 2, and a plug-in portion 31 is provided at the end of the worm gear 3. A slot 22a is provided in the middle of the flexible connector 22 corresponding to the plug-in portion 31. In this embodiment, the slot 22a is rectangular. The plug-in portion 31 is plugged into and positioned with the slot 22a. Clamping portions 211 are symmetrically provided on both sides of the fastener 21. Positioning holes 22b are symmetrically provided on both sides of the slot 22a on the flexible connector 22. In this embodiment, the positioning holes 22b are semi-circular. The clamping portions 211 are plugged into and positioned with the corresponding positioning holes 22b. When the fastener 21 is fixedly connected to the worm gear 3 through the flexible connector 22, the clamping portions 211 on both sides and the plug-in portion 31 are anti-rotationally engaged. The flexible connector 22 acts as a transition piece, filling the gap between the clamping portions 211 and the plug-in portion 31, preventing abnormal noise caused by gaps between the fastener 21 and the end of the worm gear 3. At the same time, the flexible connector 22 can also play a sealing role, improving... To ensure the reliability of the connection between the fastener 21 and the end of the worm 3, it can dampen and buffer the torque generated at the connection between the output shaft of the drive motor 2 and the worm 3, preventing deformation of the connection due to torque. In addition, the main housing 1 is provided with a bushing 212, and the flexible connector 22 is rotatably connected inside the bushing 212. The addition of the bushing 212 improves the smoothness of the rotation of the flexible connector 22 relative to the main housing 1, and the rotatable connection between the flexible connector 22 and the bushing 212 reduces the noise generated during the operation of the drive mechanism, and also improves the concentricity of the output shaft of the drive motor 2 and the fastener 21 when rotating. The worm 3 is fixed with a second bearing 32 by a retaining ring 321. The worm 3 is rotatably connected to the main housing 1 through the second bearing 32. The addition of the second bearing 32 improves the smoothness of the rotation of the worm 3 relative to the main housing 1, and can also effectively reduce the operating noise of the worm 3 when rotating relative to the main housing 1.

[0045] like Figure 6-7 As shown, the positioning structure includes an anti-rotation groove 64a and an anti-rotation part 50. The electromagnetic armature 64 is a ring-shaped part, movably sleeved on the electromagnetic shaft 61. The anti-rotation part 50 protrudes from the winding wheel 5. The anti-rotation groove 64a is formed on the electromagnetic armature 64 corresponding to the anti-rotation part 50. The anti-rotation part 50 and the corresponding anti-rotation groove 64a provide anti-rotation positioning. Unlike the traditional method of connecting the electromagnetic armature 64 and the winding wheel 5 by welding, the split design of the electromagnetic armature 64 facilitates the assembly of the electromagnetic armature 64 on the winding wheel 5 and reduces the welding process, saving costs. In addition, compared with the existing method of placing the electromagnetic armature 64 near the worm gear 3, which results in a large installation space, the electromagnetic armature 64 of this invention is placed away from the worm gear 3, which can reduce the installation space of this actuator, making the actuator structure of this invention more compact and smaller in appearance.

[0046] like Figure 6-7 and Figure 10-11 As shown, the electromagnetic shaft 61 is rotatably connected to the main housing 1 at both ends via first bearings 611. Three first bearings 611 are provided: the upper first bearing 611 connects the upper end of the electromagnetic shaft 61 to the upper cover 11; the middle first bearing 611 connects the middle part of the electromagnetic shaft 61 to the electromagnetic stator 62; and the lower first bearing 611 connects the lower end of the electromagnetic shaft 61 to the lower cover 12. The addition of three first bearings 611 improves the concentricity of the electromagnetic shaft 61's rotation, thereby enhancing the smoothness of its rotation within the main housing 1. This not only improves the efficiency of the device but also reduces noise during operation. A Hall magnetic ring 531 is fixed on the winding wheel 5, and a Hall sensor 53 is electrically connected to the stroke counting module on the main housing 1. The Hall sensor 53 and the Hall magnetic ring 531 work together. When the drive mechanism drives the winding wheel 5 to rotate forward or backward, it will drive the Hall magnetic ring 531 to rotate synchronously. The Hall sensor senses the rotation of the Hall magnetic ring 531 and feeds back the data of the number of rotations of the winding wheel 5 to the stroke counting module. The stroke counting module is used to read the opening and closing position of the car door in real time.

[0047] like Figure 8 and Figure 10-11As shown, the main housing 1 has a sliding cavity 1a, and two sets of symmetrically arranged elastic damping structures are provided in the sliding cavity 1a. The elastic damping structure includes an elastic element 14 and a first roller 15. A sliding seat 16 is slidably provided in the sliding cavity 1a. The first roller 15 is rotatably connected to the sliding seat 16. The first cable 51 and the second cable 52 are linked and reversed with the corresponding first roller 15. The elastic element 14 always has a tendency to drive the first rollers 15 on both sides to move away from each other. When the drive mechanism drives the winding wheel 5 to rotate, the first cable 51 and the second cable 52 will generate an inward squeezing force on the first rollers 15 on both sides. The symmetrically arranged elastic damping structure provides elastic tension to the first cable 51 and the second cable 52, so that the first cable 51 and the second cable 52 remain taut during the pulling of the door. At the same time, the elastic damping structure can also effectively prevent the first cable 51 and the second cable 52 from exerting force on the door. The door provides stress buffering during the pulling process, preventing breakage due to excessive instantaneous tension in the first cable 51 and the second cable 52. The main housing 1 is fixedly provided with a fixing plate 13, which is fastened to the main housing 1 to form a sliding cavity 1a. The main housing 1 has a slide rail 1b that connects to the sliding cavity 1a. The sliding seat 16 is provided with a sliding part 161 corresponding to the slide rail 1b. The sliding part 161 is guided and cooperated with the slide rail 1b, making the sliding direction of the sliding seat 16 in the sliding cavity 1a more consistent. This allows the elastic elements 14 on both sides to generate linear elastic deformation, making the buffering force distribution of the elastic damping structure of the present invention on the first cable 51 and the second cable 52 more uniform, and preventing the sliding seat 16 from accidentally getting stuck in the sliding cavity 1a. In this embodiment, the fixing plate 13 is provided with several buffer pads 131, and the fixing plate 13 is softly connected to the corresponding mounting point of the car body through the buffer pads 131.

[0048] like Figure 1-2 and Figure 9 As shown, both the front pulley structure 71 and the rear pulley structure 72 include a foot-clamping housing assembly 711 through which the first cable 51 or the second cable 52 passes. A second roller 712 is rotatably mounted inside the foot-clamping housing assembly 711. The first cable 51 and the second cable 52 are linked to the corresponding second roller 712 for reversal. The second roller 712 is fixed to the vehicle via the foot-clamping housing assembly 711. The first cable 51 and the second cable 52 are linked to the first roller 712 for reversal. The design of the second roller 712... The device improves the smoothness of the reversal of the first cable 51 and the second cable 52; the clamping foot housing assembly 711 includes a base 7111 and a top cover 7112. The side wall of the base 7111 is provided with a buckle 7111a, and the top cover 7112 is provided with a groove 7112a corresponding to the buckle 7111a. The buckle 7111a and the groove 7112a are engaged and cooperated; in this embodiment, both the first cable 51 and the second cable 52 are covered with anti-wear sleeves 54, and the anti-wear sleeves 54 are fixed to the vehicle by a clamping seat 55.

[0049] Another technical objective of this invention is to provide a method for using an automotive door actuator, comprising the following steps: S1: Drive motor 2 starts, and its output shaft drives worm gear 3 to rotate synchronously through a buffer and shock absorption structure; S2: The worm 3 drives the worm wheel 4 to rotate, and the worm wheel 4 drives the electromagnetic shaft 61 to rotate, and the electromagnetic shaft 61 drives the electromagnetic rotor 63 to rotate. S3: When the electromagnetic stator 62 is energized by the power connector 621, the electromagnetic stator becomes magnetic. The electromagnetic armature 64 is attracted towards the electromagnetic stator 62. Since the electromagnetic rotor 63 is located between the electromagnetic stator 62 and the electromagnetic armature 64, the electromagnetic armature 64 will be tightly attached to the electromagnetic rotor 63. When the electromagnetic rotor 63 rotates, due to the friction between the end faces of the electromagnetic armature 64 and the electromagnetic rotor 63, the electromagnetic rotor 63 rotates with the electromagnetic armature 64, thereby driving the winding wheel 5 fixed to the electromagnetic armature 64 to rotate. S4: The winding wheel 5 rotates, driving the corresponding first cable 51 and second cable 52 to release or retract wire in the spiral winding groove 5a, thereby opening or closing the car door.

[0050] The basic working principle of this invention is as follows: The output shaft of the drive motor 2 drives the worm gear 3 to rotate synchronously through the buffer and shock absorption structure. The worm gear 3 drives the electromagnetic shaft 61 to rotate through the worm wheel 4. The electromagnetic shaft 61 drives the electromagnetic rotor 63 to rotate. At this time, the electromagnetic stator 62 is energized through the power connector 621 and magnetism is generated, causing the electromagnetic armature 64 to be attracted towards the electromagnetic stator 62. At this time, the elastic reset member 8 is compressed and accumulates elastic potential energy. Since the electromagnetic rotor 63 is located between the electromagnetic stator 62 and the electromagnetic armature 64, the electromagnetic armature 64 will be tightly attached to the electromagnetic rotor 63. When the electromagnetic rotor 63 rotates, due to the friction between the end faces of the electromagnetic armature 64 and the electromagnetic rotor 63, the electromagnetic rotor 63 rotates with the electromagnetic armature 64, thereby driving the winding wheel 5 fixed to the electromagnetic armature 64 to rotate. When the winding wheel 5 rotates... This will drive the first cable 51 and the second cable 52 to correspondingly reel in and unelute within the spiral winding groove 5a, thereby controlling the opening or closing of the car door. When the car door is fully opened or closed, the electromagnetic stator 62 is de-energized, causing it to de-adhere to the electromagnetic armature 64. The elastic reset component 8 releases its elastic potential energy and pushes the electromagnetic armature 64 away from the electromagnetic rotor 63 to reset, preventing damage caused by excessive opening or closing of the car door. This invention uses a buffer and shock absorption structure between the output shaft of the drive motor 2 and the worm gear 3 for transition. The buffer and shock absorption structure can play a buffering and shock absorption role, effectively preventing the torque generated between the output shaft of the drive motor 2 and the worm gear 3 due to the speed difference during deceleration or acceleration, which could cause twisting deformation at the connection between the output shaft of the drive motor 2 and the worm gear 3. This gives the invention good buffering and shock absorption performance and a long service life. Specific Implementation Example 2 A car door actuator and its usage method, such as Figure 12-13 As shown, the difference between this embodiment and specific embodiment one is that: the buffer and shock absorption structure includes a shock absorption sleeve and a flexible shock absorber; a fastener is coaxially fixed to the output shaft end of the drive motor; both the fastener and the outer wall of the worm end are provided with spline portions; spline mating grooves are opened at both ends of the shock absorption sleeve corresponding to the spline portions; the spline portions of the fastener and the worm are anti-rotatingly connected to the corresponding spline mating grooves through the flexible shock absorber; a flexible shock absorber is set in each of the spline mating grooves at both ends of the shock absorption sleeve; and then the fastener is... The splined parts of the fastener and worm gear are respectively inserted into the splined grooves at both ends of the shock-absorbing sleeve to prevent rotation. A flexible shock absorber is correspondingly and sealed between the splined part of the fastener and the splined groove at one end of the shock-absorbing sleeve, and between the splined part of the worm gear and the splined groove at the other end of the shock-absorbing sleeve for transition. The buffering capacity of the flexible shock absorber is used to buffer the inertial torque between the output shaft of the drive motor and the worm gear, which plays a good protective role for the drive motor and can effectively prevent the connection between the output shaft of the drive motor and the worm gear from deforming due to torque.

[0052] The other structures of this embodiment are the same as those of Specific Embodiment 1, and will not be described again here.

[0053] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A car door actuator, comprising a drive mechanism, a front pulley structure (71) and a rear pulley structure (72), characterized in that: The drive mechanism includes a main housing (1), a drive motor (2), and a worm (3), a worm wheel (4), and a winding wheel (5) disposed inside the main housing (1). The worm (3) is connected to the worm wheel (4) in a transmission connection, and the output shaft of the drive motor (2) is fixedly connected to the worm (3) through a buffer and shock absorption structure. The outer wall of the winding wheel (5) is provided with a spiral winding groove (5a), and a first cable (51) is wound in the spiral winding groove (5a). The driving mechanism is connected to the front pulley structure (71) through the first cable (51). A second cable (52) is wound in the spiral winding groove (5a). The driving mechanism is connected to the rear pulley structure (72) through the second cable (52). The winding directions of the first cable (51) and the second cable (52) are opposite. An electromagnetic clutch (6) is provided in the inner cavity of the winding wheel (5). The electromagnetic clutch (6) includes an electromagnetic shaft (61), an electromagnetic stator (62), an electromagnetic rotor (63), and an electromagnetic armature (64). The electromagnetic rotor (63) is located between the electromagnetic stator (62) and the electromagnetic armature (64). The electromagnetic shaft (61) is coaxially fixed to the worm gear (4). The electromagnetic rotor (63) is coaxially fixed to the electromagnetic shaft (61). The electromagnetic stator (62) is fixedly connected to the main housing (1) through a fixing plate (13). The electromagnetic stator (62) is electrically connected to a power connector (621). The electromagnetic armature (64) is engaged with the winding wheel (5) through a positioning structure to prevent rotation. An elastic reset member (8) is provided between the electromagnetic rotor (63) and the electromagnetic armature (64) in the axial direction. When the electromagnetic stator (62) is energized, it generates magnetism. The electromagnetic armature (64) is attracted to the electromagnetic rotor (63). The driving mechanism drives the electromagnetic rotor (63) to rotate. The electromagnetic rotor (63) drives the winding wheel (5) to rotate in the same direction through the electromagnetic armature (64).

2. The automotive door actuator according to claim 1, characterized in that: The buffer and shock absorption structure is configured as a flexible connector (22). The output shaft end of the drive motor (2) is coaxially fixed with a fastener (21). The end of the worm (3) is provided with a plug-in part (31). The flexible connector (22) has a slot (22a) in the middle corresponding to the plug-in part (31). The plug-in part (31) is inserted and positioned with the slot (22a). The fastener (21) is symmetrically provided with clamping parts (211) on both sides. The flexible connector (22) has symmetrically provided with positioning holes (22b) on both sides of the slot (22a). The clamping parts (211) are inserted and positioned with the corresponding positioning holes (22b). When the fastener (21) is fixedly connected to the worm (3) through the flexible connector (22), the clamping parts (211) on both sides are anti-rotationally engaged with the plug-in part (31).

3. The automotive door actuator according to claim 1, characterized in that: The buffer and shock absorption structure includes a shock absorption sleeve (23) and a flexible shock absorber (231). The output shaft end of the drive motor (2) is coaxially fixed with a fastener (21). The outer wall of both the fastener (21) and the end of the worm (3) is provided with a spline portion (213). The two ends of the shock absorption sleeve (23) are provided with spline mating grooves (23a) corresponding to the spline portion (213). The spline portion (213) of the fastener (21) and the worm (3) are connected to the corresponding spline mating groove (23a) through the flexible shock absorber (231) to prevent rotation.

4. The automotive door actuator according to claim 1, characterized in that: The positioning structure includes an anti-rotation groove (64a) and an anti-rotation part (50). The electromagnetic armature (64) is movably sleeved on the electromagnetic shaft (61). The anti-rotation part (50) protrudes from the winding wheel (5). The anti-rotation groove (64a) is opened on the electromagnetic armature (64) corresponding to the anti-rotation part (50). The anti-rotation part (50) is positioned to prevent rotation by corresponding to the anti-rotation groove (64a).

5. A car door actuator according to claim 4, characterized in that: The electromagnetic shaft (61) is rotatably connected to the main housing (1) at both ends via the first bearing (611).

6. The automotive door actuator according to claim 1, characterized in that: A Hall magnetic ring (531) is fixed on the winding wheel (5), and a Hall sensor (53) electrically connected to the stroke counting module is provided on the main housing (1). The Hall sensor (53) and the Hall magnetic ring (531) are inductively coupled.

7. A car door actuator according to claim 1, characterized in that: The main housing (1) has a sliding cavity (1a), and two sets of symmetrically arranged elastic damping structures are provided in the sliding cavity (1a). The elastic damping structure includes an elastic element (14) and a first roller (15). A sliding seat (16) is slidably provided in the sliding cavity (1a). The first roller (15) is rotatably connected to the sliding seat (16). The first cable (51) and the second cable (52) are linked and reversed with the corresponding first roller (15). The elastic element (14) always has a tendency to drive the first rollers (15) on both sides to move away from each other.

8. A car door actuator according to claim 7, characterized in that: The main housing (1) is fixedly provided with a fixing plate (13), the fixing plate (13) and the main housing (1) are fastened together to form the sliding cavity (1a), the main housing (1) is provided with a slide (1b) communicating with the sliding cavity (1a), the sliding seat (16) is provided with a sliding part (161) corresponding to the slide (1b), and the sliding part (161) is guided and cooperated with the slide (1b).

9. A car door actuator according to claim 1, characterized in that: Both the front pulley structure (71) and the rear pulley structure (72) include a foot-clamping housing assembly (711) through which the first cable (51) or the second cable (52) passes. A second roller (712) is rotatably provided inside the foot-clamping housing assembly (711). The first cable (51), the second cable (52) and the corresponding second roller (712) are linked and reversed.

10. A method of using an automotive door actuator as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The drive motor starts, and its output shaft drives the worm gear to rotate synchronously through the buffer and shock absorption structure; S2: The worm drives the worm wheel to rotate, the worm wheel drives the electromagnetic shaft to rotate, and the electromagnetic shaft drives the electromagnetic rotor to rotate. S3: By connecting the power plug, the electromagnetic stator is energized, making it magnetic. The electromagnetic armature is attracted towards the electromagnetic stator. Since the electromagnetic rotor is located between the electromagnetic stator and the electromagnetic armature, the electromagnetic armature will be tightly attached to the electromagnetic rotor. When the electromagnetic rotor rotates, due to the friction between the end faces of the electromagnetic armature and the electromagnetic rotor, the electromagnetic rotor rotates with the electromagnetic armature, thereby driving the winding wheel fixed to the electromagnetic armature to rotate. S4: The winding wheel rotates, driving the corresponding first and second cables to release or retract wires in the spiral winding groove, thereby opening or closing the car door.

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