Driving device applied to electric sliding door

Abstract

The utility model belongs to the technical field of electric sliding doors, and provides a driving device applied to an electric sliding door, which comprises a motor assembly, a speed reduction transmission assembly, a stay wire pulley assembly and a reel assembly, a stay wire is arranged on the stay wire pulley assembly and is connected with a sliding door hinge, and when the stay wire on one side moves, the stay wire on the other side moves. The other side of the pull wire is tightened and moves under the action of the tensile force, so that the pull wire cannot be scattered; the stay wire is wound on the reel assembly, and the reel assembly is connected with one end of the speed reduction transmission assembly and used for driving the stay wire to move front and back to achieve movement of the sliding door. The electric sliding door driving device has the advantages that high torque is provided to drive the sliding door to be electrically opened and closed by the aid of two-stage transmission matching of the helical teeth and the straight teeth, the electric sliding door driving device can output large torque by the aid of a small electromagnetic clutch, the clutch cannot slip when the electric sliding door is in a normal working state, and the service life of the electric sliding door is prolonged. Therefore, the driving device is lighter, smaller, lower in cost and more reliable in function.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric sliding doors, and in particular relates to a driving device applied to an electric sliding door. Background Art

[0002] With the rapid development of automobile electrification, networking, intelligence and sharing, electric sliding doors are becoming more and more common in automobiles. Electric sliding doors are easy to operate and can greatly improve customer comfort and convenience. Generally, the electromagnetic clutch of the electric sliding door drive is installed on the turbine or on the transmission part that is finally connected to the winding device. The static plate is fixed and the dynamic plate provides torque when it rotates. Insufficient friction leads to small torque, which is prone to slippage and difficult to increase the torque. The greater the torque, the higher the cost and the larger the volume. The production and processing are difficult, the process is complex and the precision requirements are high. Therefore, it is necessary to design a new drive device for the electric sliding door. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a driving device for an electric sliding door that is lighter, smaller, lower in cost and provides high torque, in view of the current status of the existing technology.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: This patent also provides a driving device for an electric sliding door, which is installed on a vehicle body and is characterized by comprising:

[0005] A motor assembly for providing power output;

[0006] A reduction transmission assembly connected to the motor assembly and used to transmit power and increase torque;

[0007] A pull wire pulley assembly has a pull wire on it and is connected to the sliding door hinge. When the pull wire on one side moves, the other side will be tightened and move due to the tensioning force, so that the pull wire will not become tangled.

[0008] The wire pulley assembly is connected to one end of the reduction transmission assembly and is used to drive the wire pulley to move back and forth to realize the movement of the sliding door.

[0009] In the above-mentioned driving device applied to an electric sliding door, the motor assembly includes a motor assembly, a motor output shaft, a Hall magnet ring, a motor PCBA board and a motor helical gear. The motor helical gear and the Hall magnet ring are installed on the motor output shaft, and the motor PCBA board is installed on the brush holder of the motor assembly.

[0010] In the above-mentioned driving device applied to the electric sliding door, the driving device further includes a reduction gear box seat and a reduction gear box cover, and the reduction transmission assembly is installed in the space formed by the reduction gear box seat and the reduction gear box cover.

[0011] In the above-mentioned driving device applied to the electric sliding door, the motor is assembled into a module having a separate housing or is integrated in a reduction gearbox seat and a reduction gearbox cover.

[0012] In the above-mentioned driving device applied to the electric sliding door, the driving device also includes an ECU controller, which is connected to the motor assembly and the motor PCBA board through a wiring harness. The ECU controller is a module with a separate housing or integrated in a reduction gear box seat and a reduction gear box cover.

[0013] In the above-mentioned driving device applied to the electric sliding door, the reduction transmission assembly includes a primary gear and a secondary gear. The primary gear has a helical tooth surface, and the helical tooth surface of the primary gear is connected to the helical gear of the motor. The other end of the primary gear is a spur gear and is connected to the secondary gear.

[0014] As another embodiment, in the above-mentioned driving device applied to the electric sliding door, the driving device further includes a clutch assembly, and the clutch assembly is connected and mounted on the primary gear.

[0015] In the above-mentioned driving device applied to the electric sliding door, the clutch assembly includes an electromagnetic coil, a clutch spline, an armature, a friction plate and a spring plate. The clutch spline is fixed to the armature, one end of the clutch spline is connected to the primary gear through a spline pair, and the other end is connected to the reduction gear cover. A friction plate and a spring plate are arranged between the armature and the primary gear, and the friction plate is connected to the primary gear through a slot structure.

[0016] In the above-mentioned driving device applied to the electric sliding door, the winding wheel assembly includes a winding wheel and a winding tensioning cover, and a winding wheel spline is installed in the middle of the secondary gear. One end of the winding wheel spline is connected to the reduction gear box cover, and the other end passes through the oil-containing bearing coated in the reduction gear box seat and is connected to the winding wheel through a spline pair and then connected to the winding tensioning cover.

[0017] In the above-mentioned driving device applied to the electric sliding door, one end of the winding wheel is a spline groove and the other end is cylindrical. The end of the winding wheel spline after passing through the winding wheel has a step structure, and the step structure has a retaining ring, and the winding wheel is fixed by the retaining ring.

[0018] In the above-mentioned driving device applied to the electric sliding door, a tensioning assembly is arranged next to the winding wheel, and the tensioning assembly includes at least one pair of tensioning wheels, tensioning wheel shafts and tensioning springs. The tensioning wheels and tensioning wheel shafts are clamped between the reduction gear box seat and the winding tensioning cover. The end faces of the reduction gear box seat and the winding tensioning cover have oblong holes for placing the tensioning wheel shafts. A round pancake-shaped boss is provided on one side of the tensioning wheel shaft, and the tensioning wheel is inserted into the other side.

[0019] In the above-mentioned driving device applied to the electric sliding door, grooves are provided on both sides of the tensioning wheel shaft, and two tensioning springs are installed in the grooves.

[0020] In the above-mentioned driving device applied to the electric sliding door, the cable pulley assembly includes a front cable assembly, a rear cable assembly, a front pulley assembly and a rear pulley assembly. The front cable assembly and the rear cable assembly wound in directions opposite to each other are installed on the winding wheel. The cable of the cable pulley assembly then passes through the symmetrical tensioning wheel, passes through the winding tensioning cover, and is connected to the front pulley assembly and the rear pulley assembly.

[0021] In the above-mentioned driving device applied to the electric sliding door, the front pulley assembly includes a front pulley, a front pulley mounting shaft, a front pulley seat, a front pulley cover, a front pulley seat waterproof rubber sleeve, a front pulley seat waterproof foam and a front pull wire assembly plastic snap ring end; the rear pulley assembly includes a rear pulley, a rear pulley seat, a rear pulley mounting shaft, a rear pulley seat waterproof rubber sleeve, a rear pulley cover, a rear pulley seat waterproof foam and a rear pull wire assembly plastic snap ring end; the pull wire of the pull wire assembly then passes through the symmetrical tensioning pulley and out of the winding tensioning cover, and then passes through the pull wire protective tube, the front pulley, the rear pulley, the front pulley shaft, the rear pulley shaft, the front pulley seat, the front pulley cover, the rear pulley seat, the rear pulley cover, the front pulley seat waterproof rubber sleeve, the rear pulley seat waterproof rubber sleeve, the front pulley seat waterproof foam, the rear pulley seat waterproof foam and the front pull wire assembly plastic snap ring end and the rear pull wire assembly plastic snap ring end.

[0022] In the above-mentioned driving device applied to the electric sliding door, the winding tensioning cover is specifically provided with an inverted slot, and the connectors of the front and rear pull wire assemblies are installed in the inverted slot by interference fit.

[0023] Compared with the existing technology, the advantage of the present invention is that it uses the combination of helical teeth and straight teeth in the two-stage transmission to provide high-torque drive for the electric opening and closing of the sliding door. There are multiple versions to choose from. The use of a smaller electromagnetic clutch can also enable the electric sliding door drive device to output a larger torque, and the clutch will not slip when the electric sliding door is in normal working condition. The absence of an electromagnetic clutch makes the drive device lighter, smaller, lower cost and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1Is the installation schematic diagram of the driving device applied to the electric sliding door;

[0025] Figure 2 Is the front view of the driving device applied to the electric sliding door;

[0026] Figure 3 Is the bottom view of the driving device applied to the electric sliding door;

[0027] Figure 4 Is the explosion view of the driving device applied to the electric sliding door without clutch;

[0028] Figure 5 Is the explosion view of the driving device applied to the electric sliding door with small clutch;

[0029] Figure 6 Is the motor reduction box assembly of the driving device applied to the electric sliding door;

[0030] Figure 7 Is the integrated explosion view of the ECU integrated Hall sensor driving mechanism;

[0031] Figure 8 Is the front and rear pull wire assembly plastic snap ring end structure schematic view. DETAILED DESCRIPTION

[0032] The following is a specific embodiment of the utility model and in combination with the drawings, the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0033] In the drawing, motor assembly 1; reduction transmission assembly 2; pull wire pulley assembly 3; winding wheel assembly 4; ECU controller 5; reduction box seat 6; reduction box cover 7; sliding door hinge 8; pull wire 9; clutch assembly 10; electromagnetic coil 11; clutch spline 12; armature 13; friction plate 14; elastic sheet 15; motor assembly 16; motor output shaft 17; Hall magnetic ring 18; motor PCBA board 19; motor helical gear 20; primary gear 21; secondary gear 22; straight gear 23; winding wheel 24; winding tension cover 25; winding wheel spline 26; snap ring 27; tension pulley 28; tension pulley shaft 29; tension spring 30; groove 31; front pull wire assembly 32; rear pull wire assembly 33; front pulley assembly 34; rear pulley assembly 35; front pulley 36; front pulley seat 37; front pulley seat waterproof rubber sleeve 38; front pulley seat waterproof foam 39; front pull wire assembly plastic snap ring end 40; rear pulley 41; rear pulley seat 42; rear pulley seat waterproof rubber sleeve 43; rear pulley seat waterproof foam 44; rear pull wire assembly plastic snap ring end 45; driving device 46; front pulley mounting shaft 47; front pulley cover 48; rear pulley mounting shaft 49; rear pulley cover 50.

[0034] As Figure 1 , Figure 2 、 Figure 3 as well as Figure 5 As shown, the driving device of the electric sliding door is installed on the vehicle body. Here, the driving device 46 is installed on the rear side of the vehicle body by means including but not limited to clips and screws. The entire driving device 46 includes a motor assembly 1, a reduction transmission assembly 2, a cable pulley assembly 3, a winding wheel assembly 4, an ECU controller 5, a reduction box seat 6 and a reduction box cover 7. Here, the ECU controller 5 is a module with a separate housing or integrated in the reduction box seat 6 and the reduction box cover 7. When the ECU controller 5 is installed on the reduction box seat 6 and the reduction box cover 7 The entire volume is lighter and smaller. The motor assembly 1 is used to provide power output; the reduction transmission assembly 2 is connected to the motor assembly 1 and is used to transmit power and increase torque; the cable pulley assembly 3 has a cable 9 on the cable pulley assembly 3 and is connected to the sliding door hinge 8. When the cable 9 on one side moves, the other side will be tightened and move due to the tension, so that the cable 9 will not be scattered. The cable 9 of the winding wheel assembly 4 is wound on the winding wheel assembly. The winding wheel assembly 4 is connected to one end of the reduction transmission assembly 2 and is used to drive the cable 9 to move back and forth to realize the sliding door movement, such as Figure 8 As shown, one end of the front and rear pull wires with plastic clamping rings are respectively connected to the sliding door through a hinge. The driving device also includes a reduction box seat 6 and a reduction box cover 7. The reduction transmission assembly 2 is installed in the space formed by the reduction box seat 6 and the reduction box cover 7. This patent can choose a solution with a small clutch or a solution without a clutch. In order to save effort in operation after power failure, Figure 5 As shown, when a small clutch solution is selected, the clutch assembly 10 includes an electromagnetic coil 11, a clutch spline 12, an armature 13, a friction plate 14 and a spring 15.

[0035] Specifically, if Figure 4 As shown, the motor assembly 1 includes a motor assembly 16, a motor output shaft 17, a Hall magnetic ring 18, a motor PCBA board 19 and a motor bevel gear 20. The motor bevel gear 20 and the Hall magnetic ring 18 are installed on the motor output shaft 17. The motor PCBA board 19 is installed on the brush holder of the motor assembly 16. The ECU controller 5 is installed in the ECU housing. The ECU controller 5 is connected to the motor assembly 16 and the motor PCBA board 19 through a wiring harness. When there is a clutch assembly 10, the ECU controller 5 is also electrically connected to the electromagnetic coil 11. The ECU housing is connected to the reduction gear seat 6 or placed elsewhere through but not limited to buckles, cable ties, screws, etc. The motor assembly 16 is fixed to the reduction gear seat 6 by the motor mounting screws and has a waterproof function such as a sealing structure or a sealing gasket. The electromagnetic coil 11 is fixed to the reduction gear cover 7 through a structure or screws. In this patent, the motor assembly 16 is a module with a separate housing or integrated in the reduction gear seat 6 and the reduction gear cover 7, such as Figure 7As shown, this is a brushless motor solution, in which the motor assembly 16 is an original component without a housing and is directly assembled in the reduction gearbox seat 6 and the reduction gearbox cover 7, so that the overall volume is smaller.

[0036] The Hall magnetic ring 18 at the center of this patent is in the shape of a circular pancake and is fixed on the motor output shaft 17 or the magnet on the brushless motor rotor is directly used as the Hall magnetic ring 18 to identify the motor rotation position. At least one of the ECU controller 5 or the motor PCBA board 19 is provided with a Hall sensor or magnetic encoder, which is installed 1-2 mm from the end face or side face of the Hall magnetic ring 18 or the brushless motor rotor to identify the motor rotation position.

[0037] like Figure 6 As shown, in this patent, in order to provide high torque to drive the sliding door to open and close electrically, as an optimization, the reduction transmission assembly 2 includes a primary gear 21 and a secondary gear 22, the primary gear 21 has a helical tooth surface, the helical tooth surface of the primary gear 21 is connected to the motor helical gear 20, the other end of the primary gear 21 is a helical gear or a spur gear 23 and is connected to the secondary gear 22, wherein the primary gear 21 is a helical gear, and the secondary gear 22 is a spur gear or a helical gear, the helical gear 21 and the spur gear 23 can be made into an integral part or can be installed as two parts or made into a plastic package, such as Figure 5 As shown, when the clutch solution is selected, the clutch assembly 10 is connected and installed on the primary gear 21. The clutch assembly 10 includes an electromagnetic coil 11, a clutch spline 12, an armature 13, a friction plate 14 and a spring plate 15. The clutch spline 12 is fixed to the armature 13. One end of the clutch spline 12 is connected to the primary gear 21 through a spline pair, and the other end is connected to the reduction gear cover 7. A friction plate 14 and a spring plate 15 are arranged between the armature 13 and the primary gear 21. The friction plate 14 is connected to the primary gear 21 through a slot structure. The clutch assembly 10 of this patent is placed on the primary gear 21. In this way, using a smaller electromagnetic clutch can also enable the electric sliding door drive device to output a larger torque, and meet the requirement that the clutch will not slip when the electric sliding door is in normal working condition.

[0038] In electric operation mode: when the electric sliding door driving device receives the door opening / closing signal from the ECU controller 5, the electromagnetic coil 11 of the clutch is energized to attract the friction plate 14 and compress the spring plate 15 to connect with the magnetic yoke, and the driving device drives the winding wheel assembly 4 to rotate through the secondary gear reduction so that the ends of the front and rear cables with the plastic clamping end rings slide with the hinges, thereby driving the sliding door to realize the electric opening and closing function; or in the case of no clutch, the driving device directly drives the winding wheel assembly 4 to rotate through the secondary gear reduction so that the ends of the front and rear cables with the plastic clamping end rings slide with the above-mentioned hinges, thereby driving the sliding door to realize the electric opening and closing function;

[0039] In manual working condition: the power signal of the electric sliding door drive remains disconnected, the clutch friction plate 14 is bounced open by the shrapnel 15, and there is no resistance from the secondary gear 22, the primary gear 21, the motor bevel gear 20, and the motor assembly 16 when manually opening and closing the door. The door can be opened and closed with a lighter manual force; or there is no clutch and the door is opened and closed manually directly. At this time, there will be resistance from the secondary gear 22, the primary gear 21, the motor bevel gear 20, and the motor assembly 16, but the design is within a certain smaller force value range and does not affect user use.

[0040] The winding wheel assembly 4 includes a winding wheel 24 and a winding tensioning cover 25. A winding wheel spline 26 is installed in the middle of the secondary gear 22. One end of the winding wheel spline 26 is connected to the reduction box cover 7, and the other end passes through the oil-containing bearing coated in the reduction box seat 6 and is connected to the winding wheel 24 through a spline pair and then connected to the tensioning cover. One end of the winding wheel 24 is a spline groove, and the other end is cylindrical. The end of the winding wheel spline 26 after passing through the winding wheel 24 has a step structure, and a snap ring 27 is provided on the step structure, and the winding wheel 24 is fixed by the snap ring 27. A tensioning assembly is provided next to the winding wheel 24, and the tensioning assembly includes at least one pair of tensioning wheels 28, a tensioning wheel shaft 29 and a tensioning spring 30. The tensioning assembly is a symmetrical structure, and the tensioning wheel 28 and the tensioning wheel shaft 2 9 rotates in a straight line, and the tensioning wheel 28 and the tensioning wheel shaft 29 are clamped between the reduction gear box seat 6 and the winding tensioning cover 25. The end faces of the reduction gear box seat 6 and the winding tensioning cover 25 are provided with oblong holes for placing the tensioning wheel shaft 29. One side of the tensioning wheel shaft 29 has a round pancake-shaped boss, so it has a limiting effect after being inserted into the oblong hole, and the other side passes through the tensioning wheel 28. There are grooves 31 on both sides of the tensioning wheel shaft 29, and two tensioning springs 30 are installed in the grooves 31, which are respectively installed on both sides of the above-mentioned tensioning wheel shaft 29 to connect the tensioning wheel shaft 29 to play a tensioning role. When the tensioning wheel shaft 29 on one side moves, the other side will tighten the wire of the above-mentioned wire pulling assembly due to the action of the tensioning force and move, so that the wire will not be scattered. The tensioning spring 30 includes but is not limited to a tension spring, a spring, and a torsion spring.

[0041] The reduction gearbox mounting screws pass through the winding tensioning cover 25, the reduction gearbox seat 6 and the reduction gearbox cover 7 to connect. The connection includes but is not limited to buckles, self-tapping screws, screws and nuts, etc. Metal bushings can be added to the connection to increase strength, such as Figure 6 The reduction gearbox mounting screws shown can also directly pass through the modified reduction gearbox seat 6 and connect with the reduction gearbox cover 7 to assemble into a motor reduction gearbox assembly component.

[0042] The pull wire pulley assembly 3 includes a front pull wire assembly 32, a rear pull wire assembly 33, a front pulley assembly 34, and a rear pulley assembly 35. Specifically, the front pulley assembly 34 includes a front pulley 36, a front pulley mounting shaft 47, a front pulley cover 48, a front pulley seat 37, a front pulley seat waterproof rubber sleeve 38, a front pulley seat waterproof foam 39, and a front pull wire assembly plastic snap ring end 40. The rear pulley assembly 35 includes a rear pulley 41, a rear pulley seat 42, a rear pulley mounting shaft 49, a rear pulley cover 50, a rear pulley seat waterproof rubber sleeve 43, a rear pulley seat waterproof foam 44, and a rear pull wire assembly plastic snap ring end 45.

[0043] When installed, the middle of the winding tension cover 25 has a reverse buckle structure to position the winding wheel 24. The winding wheel 24 is installed with the front pull wire assembly 32 and the rear pull wire assembly 33 wound in opposite directions. The pull wires of the pull wire assemblies are wound around the symmetrical tension pulley 28, out of the winding tension cover 25, through the pull wire protection pipe, the front pulley 36, the rear pulley 41, the front pulley mounting shaft 47, the rear pulley mounting shaft 49, the front pulley seat 37, the rear pulley seat 42, the front pulley cover 48, the rear pulley cover 50, the front pulley seat waterproof rubber sleeve 38, the rear pulley seat waterproof rubber sleeve 43, the front pulley seat waterproof foam 39, the rear pulley seat waterproof foam 44, and the front pull wire assembly plastic snap ring end 40 and the rear pull wire assembly plastic snap ring end 45. The front pull wire assembly plastic snap ring end 40 and the rear pull wire assembly plastic snap ring end 45 are designed to include but not limited to cylindrical, reverse buckle connection, ball head connection, etc. The middle of the symmetrical tension pulley 28 has a tension pulley shaft 29, which is limited in the sliding groove by the winding tension cover 25 and the reduction box seat 6 and is installed with a tension spring 30 for tensioning. The tension pulley 28 and the tension pulley shaft 29 work in rotational motion and linear displacement motion. One end of the pull wire protection pipe of the front pull wire assembly and the rear pull wire assembly is connected through the reverse buckle slot on the winding tension cover 25 and is fitted therein. The other end is installed in the slot of the front pulley seat and the rear pulley seat and is pressed and fixed by the front pulley cover 48 and the rear pulley cover 50 and the reverse buckle structure of the front pulley seat and the rear pulley seat, like the pulley mounting shaft installed in the front pulley and the rear pulley. The front pulley seat waterproof rubber sleeve 38 and the rear pulley seat waterproof rubber sleeve 43 are installed on the front pulley seat and the rear pulley seat through the reverse buckle structure. Finally, the front pulley seat waterproof foam 39, the rear pulley seat waterproof foam 44, and the front pulley seat waterproof foam are compressed through the connection of the front pulley seat, the rear pulley seat, and the vehicle body, playing a waterproof and dustproof role.

[0044] The driving device of the application on the electric sliding door can have multiple versions to choose from. Using a smaller electromagnetic clutch can also make the electric sliding door driving device output a larger torque, and meet the normal working state of the electric sliding door without slipping the clutch. Without an electromagnetic clutch, the driving device is lighter, smaller, lower in cost, and more reliable in function.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the present application and the skilled in the art of the present application can make various modifications or substitutions of similar ways to the described specific embodiments, but will not deviate from the scope defined by the spirit of the present application.

Claims

1. A driving device for an electric sliding door, mounted on a vehicle body, characterized in that: include: A motor assembly for providing power output; A reduction transmission assembly connected to the motor assembly and used to transmit power and increase torque; A pull wire pulley assembly is provided with a pull wire and is connected to the sliding door hinge; when the pull wire on one side moves, the other side is tightened and moves due to the tensioning force, so that the pull wire will not become tangled; The wire pulley assembly is connected to one end of the reduction transmission assembly and is used to drive the wire pulley to move back and forth to realize the movement of the sliding door.

2. The driving device for an electric sliding door according to claim 1, wherein: The motor assembly includes a motor assembly, a motor output shaft, a Hall magnetic ring, a motor PCBA board and a motor helical gear. The motor helical gear and the Hall magnetic ring are installed on the motor output shaft, and the motor PCBA board is installed on the brush holder of the motor assembly.

3. The driving device for an electric sliding door according to claim 1, wherein: The driving device also includes a reduction box seat and a reduction box cover, and the reduction transmission component is installed in the space formed by the reduction box seat and the reduction box cover.

4. The driving device for an electric sliding door according to claim 2, wherein: The motor assembly is a separate module with a housing or integrated in a reduction gearbox seat and a reduction gearbox cover.

5. The driving device for an electric sliding door according to claim 4, characterized in that: The drive device also includes an ECU controller, which is connected to the motor assembly and the motor PCBA board through a wiring harness. The ECU controller is a module with a separate shell or integrated in the reduction gear box seat and the reduction gear box cover.

6. The driving device for an electric sliding door according to claim 2, wherein: The reduction transmission assembly includes a primary gear and a secondary gear. The primary gear has a helical tooth surface, and the helical tooth surface of the primary gear is connected to the helical gear of the motor. The other end of the primary gear is a spur gear and is connected to the secondary gear.

7. The driving device for an electric sliding door according to claim 6, wherein: The driving device also includes a clutch assembly, and the clutch assembly is connected and installed on the first-stage gear.

8. The driving device for an electric sliding door according to claim 7, wherein: The clutch assembly includes an electromagnetic coil, a clutch spline, an armature, a friction plate and a spring plate. The clutch spline is fixed to the armature. One end of the clutch spline is connected to the primary gear through a spline pair, and the other end is connected to the reduction gear cover. A friction plate and a spring plate are arranged between the armature and the primary gear. The friction plate is connected to the primary gear through a slot structure.

9. The driving device for an electric sliding door according to claim 6, wherein: The winding wheel assembly includes a winding wheel and a winding tensioning cover. A winding wheel spline is installed in the middle of the secondary gear. One end of the winding wheel spline is connected to the reduction gear cover, and the other end passes through the plastic-coated oil-containing bearing in the reduction gear seat and is connected to the winding wheel through a spline pair and then connected to the winding tensioning cover.

10. The driving device for an electric sliding door according to claim 9, characterized in that: One end of the winding wheel is a spline groove, and the other end is cylindrical. The end of the winding wheel after the spline passes through the winding wheel has a step structure, and the step structure has a retaining ring, and the winding wheel is fixed by the retaining ring.

11. The driving device for an electric sliding door according to claim 9, wherein: A tensioning assembly is provided next to the winding wheel, and the tensioning assembly includes at least a pair of tensioning wheels, tensioning wheel shafts and tensioning springs. The tensioning wheels and tensioning wheel shafts are clamped between the reduction gear box seat and the winding tensioning cover. The end faces of the reduction gear box seat and the winding tensioning cover have long circular holes for placing the tensioning wheel shafts. One side of the tensioning wheel shaft has a round pancake-shaped boss, and the other side passes through the tensioning wheel.

12. The driving device for an electric sliding door according to claim 11, wherein: Both sides of the tensioning wheel shaft are provided with grooves, and two tensioning springs are installed in the grooves.

13. The driving device for an electric sliding door according to claim 11, wherein: The wire pulling pulley assembly includes a front wire pulling assembly, a rear wire pulling assembly, a front pulley assembly and a rear pulley assembly. The front wire pulling assembly and the rear wire pulling assembly that are wound in directions opposite to each other are installed on the winding wheel. The wire of the wire pulling pulley assembly then passes through the symmetrical tensioning wheel, passes through the winding tensioning cover, and is connected to the front pulley assembly and the rear pulley assembly.

14. The driving device for an electric sliding door according to claim 13, wherein: The front pulley assembly includes a front pulley, a front pulley seat, a front pulley mounting shaft, a front pulley cover, a front pulley seat waterproof rubber sleeve, a front pulley seat waterproof foam and a front pulley assembly plastic snap ring end; the rear pulley assembly includes a rear pulley, a rear pulley seat, a rear pulley mounting shaft, a rear pulley, a rear pulley seat waterproof rubber sleeve, a rear pulley seat waterproof foam and a rear pulley assembly plastic snap ring end; the pull wire of the pull wire assembly then passes through the symmetrical tensioning pulley and out of the winding tensioning cover, and then passes through the pull wire protective tube, the front pulley, the rear pulley, the front pulley mounting shaft, the rear pulley mounting shaft, the front pulley seat, the rear pulley seat, the front pulley seat waterproof rubber sleeve, the front pulley cover, the rear pulley cover, the rear pulley seat waterproof rubber sleeve, the front pulley seat waterproof foam, the rear pulley seat waterproof foam and the front pulley assembly plastic snap ring end and the rear pulley assembly plastic snap ring end.

15. The driving device for an electric sliding door according to claim 13, wherein: The winding tensioning cover is specifically provided with an inverted card slot, and the connectors of the front wire pulling assembly and the rear wire pulling assembly are installed in the inverted card slot through interference fit.

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