Automobile sliding door split door drive

Abstract

The utility model discloses a kind of automobile sliding door split door drives, it includes: drive assembly, drive assembly is connected with reduction gearbox by transmission flexible axle, transmission box and reduction gearbox are installed on middle hinge, reduction gearbox power output to transmission box, middle hinge is equipped with moving assembly, moving assembly moves along middle guide rail;When using pull wire transmission, transmission box is configured as the mechanism of pull wire transmission, mechanism for tensioning pull wire is installed on middle guide rail;When using belt transmission, transmission box is configured as the mechanism of belt transmission, mechanism for tensioning belt is installed on middle guide rail.Make system structure more simple, reduce the problem of multiple transmission chain and reduce space occupation, while work efficiency and durability are improved, more convenient, simple on assembly, comprehensive cost is greatly reduced to benefit modularization popularization and use.

Description

Technical Field

[0001] This utility model relates to the field of automotive sliding door technology, and in particular to a split door drive for automotive sliding doors. Background Technology

[0002] Existing MPV sliding door drives generally adopt an integrated drive-cable transmission mode. The powertrain is arranged inside the sliding door and transmits power to the central hinge via a cable, ultimately driving the door to perform corresponding actions. Specifically, the drive motor is integrated with the gearbox and winding wheel. The cable is wound on the drive output wheel, and its trajectory changes at the central hinge, adjusting from a vertical direction to a horizontal direction. After rotating from the door to the hinge, it is installed along the guide rail, with both ends fixed to the guide rail. This integrated door-inside cable transmission method requires two sets of guide wheel mechanisms to be installed at the central hinge joint inside the door compartment and at the bottom of the central hinge outside the door compartment, respectively, to realize the cable's movement from the inside to the outside of the door.

[0003] Furthermore, the aforementioned structure involves two pull cables, which require guidance and positioning. This results in a complex door frame shape at the hinge, necessitating precise alignment of the two sets of guide wheel mechanisms. Ultimately, this leads to a complex overall structure with numerous transmission chains, large space occupation, relatively low work efficiency, low durability, a large number of parts, and high costs.

[0004] Therefore, there is an urgent need for a split door drive for automotive sliding doors that can solve one or more of the above problems. Utility Model Content

[0005] To address one or more problems existing in the prior art, this utility model provides a split door drive for automotive sliding doors. The technical solution adopted by this utility model to solve the above problems is: a split door drive for automotive sliding doors, comprising: a drive assembly, the power source of which is a motor; the drive assembly is connected to a reduction gearbox via a transmission flexible shaft; the reduction gearbox is provided with an output wheel; a transmission box and the reduction gearbox are mounted on a central hinge; a moving component is mounted on the central hinge; the moving component is a slider moving mechanism and / or a pulley moving mechanism; the moving component moves along a central guide rail; a first docking component and a second docking component are respectively mounted at both ends of the central guide rail.

[0006] When using a pull-wire drive, the moving component is moved by the pull wire. The first docking component is a first tensioning component, and the second docking component is a tensioning box. A winding wheel is installed inside the transmission box. The winding wheel is connected to the output wheel. One end of the door opening pull wire and the door closing pull wire are respectively connected to the winding wheel. The other end of the door opening pull wire and the door closing pull wire are led out of the box through the first winding guide wheel. The other end of the door closing pull wire is connected to the first tensioning component, and the other end of the door opening pull wire is connected to the tensioning box.

[0007] When using belt drive, the moving component is moved by the belt. The first docking component is a fixing component, and the second docking component is a second tensioning component. The output wheel enters the housing of the transmission box. The housing of the transmission box is equipped with a first belt guide pulley and a second belt guide pulley. The belt is wound around the output wheel, the first belt guide pulley, and the second belt guide pulley. The fixing component limits and fixes one end of the belt. One end of the belt is connected to the fixing component via the second belt guide pulley, and the other end of the belt is connected to the second tensioning component via the first belt guide pulley.

[0008] In some embodiments, the motor output shaft of the drive assembly is connected to a first gear, the outer surface of the first gear is provided with a mating groove, a compression spring is provided between the first gear and the end face of the motor, the first gear is used to mesh with a coupling, the compression spring pushes the first gear against the coupling, and the output end of the coupling is connected to the transmission flexible shaft.

[0009] The drive assembly is equipped with a switch assembly, which has a housing that encloses the motor output shaft, the first gear, and the coupling. A shift fork is rotatably mounted on the housing, with its first end connected to the mating groove. The shift fork is elastically reset by a torsion spring. Rotating the shift fork causes the first gear to engage or disengage with the coupling.

[0010] Furthermore, it also includes: a buffer assembly disposed between the first gear and the coupling, the buffer assembly comprising: a resilient flange buffer disc and a gasket.

[0011] In some embodiments, when the moving component is a pulley moving mechanism, the pulley moving mechanism is provided with a support connected to the pivot of the central hinge, and a pulley is mounted on the support.

[0012] In some embodiments, a worm gear is installed inside the gearbox housing, the first end of the worm gear is connected to the transmission flexible shaft, the pivot of the middle hinge passes through the housing and installs the output wheel and the worm wheel, the worm wheel meshes with the worm gear, and the worm wheel drives the output wheel to rotate.

[0013] In some embodiments, the flexible shaft includes a flexible shaft body and a protective sleeve, wherein the protective sleeve covers the flexible shaft body.

[0014] In some embodiments, the first tensioning assembly is provided with an installation cavity, in which a first tensioning spring is installed. A first connector is provided at a first end of the first tensioning spring, and a second end of the first tensioning spring is limited. The other end of the door closing cable passes through the first tensioning spring and is fixedly connected to the first connector. The first tensioning spring tensions the door closing cable.

[0015] In some embodiments, the second tensioning assembly includes a docking part, a tensioning shaft, and a second tensioning spring. The docking part has a mounting groove and is fixedly connected to the other end of the belt. The first end of the tensioning shaft is limited and fixed. The second tensioning spring is sleeved on the tensioning shaft, and the second end of the tensioning shaft limits the first end of the second tensioning spring. The tensioning shaft and the second tensioning spring are installed in the mounting groove, and the limiting structure in the mounting groove limits the second end of the second tensioning spring. The second tensioning spring drives the docking part to tension the belt.

[0016] In some embodiments, the tensioning box is equipped with a second winding guide wheel, a tensioning wheel and a coil spring. The coil spring is connected to the tensioning wheel, and the other end of the door opening cable is connected to the tensioning wheel via the second winding guide wheel. The coil spring drives the tensioning wheel to tighten the door opening cable.

[0017] In some embodiments, the central hinge is provided with a base, the pivot of the central hinge is rotatably mounted on the base, the transmission box and the reduction gearbox are mounted on the pivot, and the belt, the door opening cable and the door closing cable are arranged on the central guide rail.

[0018] The technical advantages achieved by this utility model are as follows: When the door drive uses cable transmission, a flexible transmission shaft is used to connect the drive assembly and the reducer. The flexible transmission shaft passes through the door wall, that is, the power of the motor is directly transmitted to the middle hinge end through the flexible transmission shaft. This eliminates the need for a cable inside the door, reduces the number of transmission guide wheels inside the door, makes the system structure simpler, reduces the problem of multiple transmission chains and reduces space occupation, while improving working efficiency and durability. Assembly is more convenient and simple, and the overall cost is greatly reduced, which is conducive to modular promotion and use.

[0019] When using belt drive, a flexible drive shaft is used to connect the drive assembly and the reducer. The flexible drive shaft passes through the door wall, meaning the motor's power is directly transmitted to the middle hinge end. The belt is installed at the outer hinge end and connected in series with the output end of the flexible drive shaft. This eliminates the traditional cable structure, reduces the number of drive pulleys inside the door, simplifies the system structure, reduces the number of drive chains and space occupation, improves working efficiency and durability, and makes assembly more convenient and simple. The overall cost is significantly reduced, which is conducive to modular promotion and use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the drive assembly and switch component of this utility model;

[0022] Figure 3 This is an exploded view of the drive assembly and switch assembly of this utility model;

[0023] Figure 4 This is a cross-sectional view of the drive assembly of this utility model;

[0024] Figure 5 This is a schematic diagram of the central hinge, gearbox, and transmission box of this utility model;

[0025] Figure 6 This is a schematic diagram of the central hinge, gearbox, transmission box, and central guide rail of this utility model.

[0026] Figure 7 This is a schematic diagram showing the connection between the gearbox and the transmission box of this utility model;

[0027] Figure 8 This is an exploded view of the gearbox of this utility model;

[0028] Figure 9 This is an exploded view of the transmission box when using wire drive in this utility model;

[0029] Figure 10 This is a schematic diagram of the internal structure of the transmission box when using belt drive in this utility model;

[0030] Figure 11 This is an exploded view of the first tensioning component of this utility model;

[0031] Figure 12 This is an exploded view of the second tensioning component of this utility model;

[0032] Figure 13 This is an exploded view of the tensioning box of this utility model.

[0033] In the diagram, 1. Drive assembly; 10. Motor output shaft; 11. First gear; 110. Connecting groove; 12. Coupling; 120. Output end; 13. Compression spring; 14. Buffer assembly; 140. Flange buffer plate; 141. Gasket; 2. Switch assembly; 20. Housing; 21. Shift fork; 210. Torsion spring; 22. Status switch; 3. Transmission flexible shaft; 30. Flexible shaft body; 31. Protective sleeve; 32. Sealing sleeve; 4. Middle hinge; 40. Rotating shaft; 41. Base; 42. Moving assembly; 420. Support; 421. Pulley; 5. Gearbox; 50. Housing; 51. First end; 52. Worm gear; 53. Worm wheel; 54. Output... 6. Output wheel; 7. Transmission box; 8. Box body; 9. Winding wheel; 10. First winding guide wheel; 11. First belt guide wheel; 12. Second belt guide wheel; 13. Middle guide rail; 14. Belt; 15. Door opening cable; 16. Door closing cable; 17. First docking assembly; 18. First tensioning assembly; 19. Mounting cavity; 10. Cover plate; 11. First tensioning spring; 12. First connector; 13. Second docking assembly; 14. Second tensioning assembly; 15. Dating piece; 16. Mounting groove; 17. Tensioning shaft; 18. Second tensioning spring; 19. Tensioning box; 10. Cover; 11. Second winding guide wheel; 12. Tensioning wheel; 19. Coil spring. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0035] This utility model discloses a split door drive for automotive sliding doors, combined with... Figures 1-4 As shown, it includes: a drive assembly 1, the power source of the drive assembly 1 is a motor, and the drive assembly 1 is connected to a reduction gearbox 5 via a transmission flexible shaft 3;

[0036] Combination Figures 5-8 As shown, the reduction gearbox 5 is equipped with an output wheel 54. The transmission box 6 and the reduction gearbox 5 are mounted on the central hinge 4. The central hinge 4 is equipped with a moving component 42, which is a slider moving mechanism and / or a pulley moving mechanism. The moving component 42 moves along the central guide rail 7, in conjunction with... Figure 1 As shown, a first docking assembly 8 and a second docking assembly 9 are respectively installed at both ends of the middle guide rail 7;

[0037] Combination Figure 1 , Figure 7 , Figure 9 , Figure 11 , Figure 13 As shown, when using the pull-wire drive, the moving component 42 is moved by the pull wire. The first docking component 8 is the first tensioning component 80, and the second docking component 9 is the tensioning box 94. They are both used to tension the pull wire, so as to retract excess pull wire in time or release pull wire when needed. The transmission box 6 has a winding wheel 61 installed in the box body 60. The winding wheel 61 is connected (engaged) with the output wheel 54. One end of the door opening pull wire 71 and the door closing pull wire 72 are respectively connected and fixed to the winding wheel 61. The other end of the door opening pull wire 71 and the door closing pull wire 72 are led out to the outside of the box body 60 through the first winding guide wheel 62. The other end of the door closing pull wire 72 is connected to the first tensioning component 80, and the other end of the door opening pull wire 71 is connected to the tensioning box 94.

[0038] Combination Figure 1 , Figure 6 , Figure 7 , Figure 10 , Figure 12 As shown, when using belt drive, the moving component 42 is moved by the belt. The first docking component 8 is a fixed component, and the second docking component 9 is a second tensioning component 90. The output wheel 54 enters the housing 60 of the transmission box 6. The housing 60 of the transmission box 6 is equipped with a first belt guide pulley 63 and a second belt guide pulley 64. The belt 70 is wound around the output wheel 54, the first belt guide pulley 63, and the second belt guide pulley 64. Figure 7 As shown, the fastener (i.e., the first docking assembly 8) limits and fixes one end of the belt 70; one end of the belt 70 is connected to the fastener via the second belt guide pulley 64, and the other end of the belt 70 is connected to the second tensioning assembly 90 via the first belt guide pulley 63.

[0039] It should be noted that the components on the central hinge 4 are referred to as the execution assembly. The execution assembly moves back and forth along the central guide rail under the action of a pull cable or belt, thereby realizing the door closing and opening actions. The drive assembly 1 of this application is located inside the door, and the execution assembly is located outside the door. They are connected and transmit power through the transmission flexible shaft 3. After the power is reduced by the reduction gearbox 5, it is output by pull cable or belt transmission through the transmission box 6, thereby simplifying the number and structure of the internal guide wheel group.

[0040] Combination Figure 8As shown, the transmission flexible shaft 3 includes a flexible shaft body 30 and a protective sleeve 31. The protective sleeve 31 encloses the flexible shaft body 30. The flexible shaft body 30 is a winding structure with multiple layers of steel wire wound around the flexible shaft core, which forms a highly flexible structure capable of transmitting rotational power in a bent state, and can bypass obstacles or transmit power in situations where space is limited or the path is complex. Figure 6 As shown, a sealing sleeve 32 can be provided at the mating end of the transmission flexible shaft 3 to achieve isolation. Furthermore, the outer surface of the flexible shaft body 30 can be flocked to reduce friction and noise, and improve reliability.

[0041] Specifically, in combination Figures 2-4 As shown, the motor output shaft 10 of the drive assembly 1 is connected to the first gear 11. The outer surface of the first gear 11 is provided with a mating groove 110 (annular groove). A compression spring 13 is provided between the first gear 11 and the end face of the motor. The first gear 11 is used to mesh with the coupling 12. The compression spring 13 pushes the first gear 11 against the coupling 12. The output end 120 of the coupling 12 is connected to the transmission flexible shaft 3.

[0042] The drive assembly 1 is equipped with a switch assembly 2, which has a housing 20. The housing 20 encloses the motor output shaft 10, the first gear 11, and the coupling 12. A shift fork 21 is rotatably mounted on the housing 20. The first end of the shift fork 21 is connected to the mating groove 110. The shift fork 21 is elastically reset by a torsion spring 210. Rotating the shift fork 21 causes the first gear 11 to engage or disengage with the coupling 12. A status switch 22 is provided on the housing 20. The status switch 22 is used to detect the position of the shift fork 21, thereby detecting whether the drive assembly 1 is in manual mode.

[0043] Combination Figure 4 As shown, it also includes: a buffer assembly 14, which is disposed between the first gear 11 and the coupling 12, and the buffer assembly 14 includes: a resilient flange buffer disc 140 and a gasket 141.

[0044] In electric mode, the compression spring 13 causes the first gear 11 to mesh with the coupling 12. At this time, the shift fork 21 also causes the first gear 11 to mesh with the coupling 12 under the action of the torsion spring 210. The opening and closing of the door is achieved by starting and stopping the motor of the drive assembly 1.

[0045] In manual mode, by moving the shift fork 21 via an electric or mechanical mechanism, the first gear 11 is disengaged from the coupling 12. At this time, the drive assembly 1 can no longer transmit power through the transmission flexible shaft 3, and the user can easily manually pull the door to move it. The position of the shift fork 21 is detected by the status switch 22 to determine the current status, and the motor is stopped according to actual needs.

[0046] Specifically, in combination Figure 5 As shown, when the moving component 42 is a pulley moving mechanism, the pulley moving mechanism is provided with a support 420 connected to the rotating shaft 40 of the central hinge 4, a pulley 421 is installed on the support 420, and the central guide rail 7 is provided with a guide rail groove that cooperates with the pulley 421.

[0047] Specifically, in combination Figure 5 , Figure 6 As shown, the central hinge 4 is provided with a base 41, the pivot 40 of the central hinge 4 is rotatably mounted on the base 41, the transmission box 6 and the reduction gearbox 5 are mounted on the pivot 40, and the belt 70, the door opening cable 71 and the door closing cable 72 are arranged on the central guide rail 7.

[0048] Specifically, in combination Figure 7 , Figure 8 As shown, a worm gear 52 is installed inside the housing 50 of the gearbox 5. The first end of the worm gear 52 is connected to the transmission flexible shaft 3. The rotating shaft 40 of the middle hinge 4 passes through the housing 50 and installs the output wheel 54 and the worm wheel 53. The worm wheel 53 meshes with the worm gear 52, and the worm wheel 53 drives the output wheel 54 to rotate.

[0049] Specifically, in combination Figure 11 As shown, the first tensioning assembly 80 is provided with an installation cavity 800, which is sealed by a cover plate 81. A first tensioning spring 82 is installed in the installation cavity 800. A first connector 83 is provided at the first end of the first tensioning spring 82, and the second end of the first tensioning spring 82 is limited. The other end of the door closing cable 72 passes through the first tensioning spring 82 and is fixedly connected to the first connector 83. The first tensioning spring 82 tensions the door closing cable 72.

[0050] Specifically, in combination Figure 12As shown, the second tensioning assembly 90 is provided with a docking part 91, a tensioning shaft 92, and a second tensioning spring 93. The docking part 91 is provided with a mounting groove 910 and is fixedly connected to the other end of the belt 70. The first end of the tensioning shaft 92 is limited and fixed. The second tensioning spring 93 is sleeved on the tensioning shaft 92, and the second end of the tensioning shaft 92 limits the first end of the second tensioning spring 93. The tensioning shaft 92 and the second tensioning spring 93 are installed in the mounting groove 910. The limiting structure (step or snap-fit ​​structure, etc.) in the mounting groove 910 limits the second end of the second tensioning spring 93. The second tensioning spring 93 drives the docking part 91 to tension the belt 70. By screwing in or out the tensioning shaft 92, the second tensioning spring 93 can be adjusted to achieve the tension adjustment of the belt 70.

[0051] Specifically, in combination Figure 13 As shown, the tension box 94 is provided with a cover 940 for sealing. The tension box 94 is equipped with a second winding guide wheel 95, a tension wheel 96 and a coil spring 97. The coil spring 97 is connected to the tension wheel 96. The other end of the door opening pull cable 71 is connected to the tension wheel 96 via the second winding guide wheel 95. The coil spring 97 drives the tension wheel 96 to tighten the door opening pull cable 71.

[0052] When there is redundant length during the cable pull, the first tensioning component 80 and the tensioning box 94 promptly retract or release the cable, avoiding problems such as uneven cable return and tangling / skipping. The front end of the belt is fixed by the fastener, and the rear end is adjusted by the second tensioning component 90.

[0053] In summary, when using cable drive, the door drive uses a flexible shaft to connect the drive assembly and the reducer. The flexible shaft passes through the door wall, meaning the motor's power is directly transmitted to the middle hinge end. This eliminates the need for internal cable drives and reduces the number of internal drive pulleys, resulting in a simpler system structure, fewer transmission chains, and less space occupation. At the same time, it improves work efficiency and durability, makes assembly more convenient and simple, and significantly reduces overall costs, facilitating modular adoption.

[0054] When using belt drive, a flexible drive shaft is used to connect the drive assembly and the reducer. The flexible drive shaft passes through the door wall, meaning the motor's power is directly transmitted to the middle hinge end. The belt is installed at the outer hinge end and connected in series with the output end of the flexible drive shaft. This eliminates the traditional cable structure, reduces the number of drive pulleys inside the door, simplifies the system structure, reduces the number of drive chains and space occupation, improves working efficiency and durability, and makes assembly more convenient and simple. The overall cost is significantly reduced, which is conducive to modular promotion and use.

[0055] The embodiments described above are merely illustrative of one or more implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A split door drive for an automotive sliding door, characterized in that, include: The drive assembly is powered by an electric motor. The drive assembly is connected to a reduction gearbox via a transmission flexible shaft. The reduction gearbox is equipped with an output wheel. The transmission box and the reduction gearbox are mounted on a central hinge. The central hinge is equipped with a moving component, which is a slider moving mechanism and / or a pulley moving mechanism. The moving component moves along a central guide rail. A first docking component and a second docking component are respectively mounted at both ends of the central guide rail. When using a pull-wire drive, the moving component is moved by the pull wire. The first docking component is a first tensioning component, and the second docking component is a tensioning box. A winding wheel is installed inside the transmission box. The winding wheel is connected to the output wheel. One end of the door opening pull wire and the door closing pull wire are respectively connected to the winding wheel. The other end of the door opening pull wire and the door closing pull wire are led out of the box through the first winding guide wheel. The other end of the door closing pull wire is connected to the first tensioning component, and the other end of the door opening pull wire is connected to the tensioning box. When using belt drive, the moving component is moved by the belt. The first docking component is a fixing component, and the second docking component is a second tensioning component. The output wheel enters the housing of the transmission box. The housing of the transmission box is equipped with a first belt guide pulley and a second belt guide pulley. The belt is wound around the output wheel, the first belt guide pulley, and the second belt guide pulley. The fixing component limits and fixes one end of the belt. One end of the belt is connected to the fixing component via the second belt guide pulley, and the other end of the belt is connected to the second tensioning component via the first belt guide pulley.

2. The split door drive for automotive sliding doors according to claim 1, characterized in that, The motor output shaft of the drive assembly is connected to the first gear. The outer surface of the first gear is provided with a mating groove. A compression spring is provided between the first gear and the end face of the motor. The first gear is used to mesh with the coupling. The compression spring pushes the first gear against the coupling. The output end of the coupling is connected to the transmission flexible shaft. The drive assembly is equipped with a switch assembly, which has a housing that encloses the motor output shaft, the first gear, and the coupling. A shift fork is rotatably mounted on the housing, with its first end connected to the mating groove. The shift fork is elastically reset by a torsion spring. Rotating the shift fork causes the first gear to engage or disengage with the coupling.

3. The split door drive for automotive sliding doors according to claim 2, characterized in that, Also includes: A buffer assembly is disposed between the first gear and the coupling, and the buffer assembly includes: a resilient flange buffer disc and a gasket.

4. The split door drive for automotive sliding doors according to claim 1, characterized in that, When the moving component is a pulley moving mechanism, the pulley moving mechanism is provided with a support connected to the pivot of the central hinge, and a pulley is installed on the support.

5. The split door drive for automotive sliding doors according to claim 1, characterized in that, A worm gear is installed inside the gearbox. The first end of the worm gear is connected to the transmission flexible shaft. The rotating shaft of the middle hinge passes through the gearbox and installs the output wheel and the worm wheel. The worm wheel meshes with the worm gear and drives the output wheel to rotate.

6. The split door drive for automotive sliding doors according to claim 1, characterized in that, The transmission flexible shaft includes a flexible shaft body and a protective sleeve, wherein the protective sleeve covers the flexible shaft body.

7. The split door drive for automotive sliding doors according to claim 1, characterized in that, The first tensioning component is provided with an installation cavity, in which a first tensioning spring is installed. The first end of the first tensioning spring is provided with a first connector, and the second end of the first tensioning spring is limited. The other end of the door closing cable passes through the first tensioning spring and is fixedly connected to the first connector. The first tensioning spring tensions the door closing cable.

8. The split door drive for automotive sliding doors according to claim 1, characterized in that, The second tensioning assembly includes a docking part, a tensioning shaft, and a second tensioning spring. The docking part has an installation groove and is fixedly connected to the other end of the belt. The first end of the tensioning shaft is limited and fixed. The second tensioning spring is sleeved on the tensioning shaft, and the second end of the tensioning shaft limits the first end of the second tensioning spring. The tensioning shaft and the second tensioning spring are installed into the installation groove, and the limiting structure in the installation groove limits the second end of the second tensioning spring. The second tensioning spring drives the docking part to tension the belt.

9. The split door drive for automotive sliding doors according to claim 1, characterized in that, The tensioning box is equipped with a second winding guide wheel, a tensioning wheel, and a coil spring. The coil spring is connected to the tensioning wheel. The other end of the door opening cable is connected to the tensioning wheel via the second winding guide wheel. The coil spring drives the tensioning wheel to tighten the door opening cable.

10. The split door drive for automotive sliding doors according to claim 1, characterized in that, The central hinge is provided with a base, and the pivot of the central hinge is rotatably mounted on the base. The transmission box and the reduction gearbox are mounted on the pivot, and the belt, the door opening cable, and the door closing cable are arranged on the central guide rail.

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