A driving assembly of an electric sliding door of an automobile and an electric sliding door of an automobile

Abstract

The utility model discloses a kind of drive assembly of automobile electric side sliding door and automobile electric side sliding door, it is related to automobile parts technical field, drive assembly includes winding box, driver and speed reducer, rotatable winding wheel and the pull line wound on winding wheel are equipped on winding box, pull line is used to drag side sliding door body to slide, speed reducer is used to transmit the torque of driver to winding wheel, winding wheel includes wheel body and the winding groove for positioning pull line set on the outer circumferential surface of wheel body, recess is equipped on wheel body, speed reducer is housed in recess and transmission cooperation with wheel body, driver is installed on winding box and its driving shaft extends into winding box and transmission cooperation with speed reducer.The utility model discloses drive assembly, its compact structure has smaller size, with good versatility.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to the drive assembly of an electric sliding door for automobiles and the electric sliding door itself. Background Technology

[0002] Some cars have sliding doors, which require sliding tracks installed below the door, on the roof, or in the middle of the vehicle. The doors themselves are often designed to be thicker and heavier to fit these tracks, requiring considerable force to open and close. For user convenience, some vehicles are equipped with power sliding doors.

[0003] Electric sliding doors include a drive system. Generally, the drive system moves the sliding door by retracting and extending a pull cable. The drive system needs to have sufficient force to move the sliding door and enable it to lock in place with the locking mechanism. The drive system includes a brushless motor and a reducer. The reducer can reduce the speed of the brushless motor drive shaft and increase the torque.

[0004] The reducer and drive unit are both quite large, making the overall drive assembly quite bulky and taking up a significant amount of installation space on the vehicle body. This is especially true for some small vehicles (small vans), where it is difficult to install electric sliding doors. Utility Model Content

[0005] This utility model aims to solve one of the technical problems in related technologies to a certain extent. To this end, this utility model provides a drive assembly for an electric sliding door for automobiles, which has a compact structure, small size, and good versatility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A drive assembly for an electric sliding door of an automobile includes a winding box, a driver, and a reducer. The winding box has a rotatable winding wheel and a pull cable wound on the winding wheel. The pull cable is used to drag the sliding door body to slide. The reducer is used to transmit the torque of the driver to the winding wheel. The winding wheel includes a wheel body and a winding groove on the outer peripheral surface of the wheel body for positioning the pull cable. The wheel body has a cavity. The reducer is received in the cavity and drivesly engages with the wheel body. The driver is mounted on the winding box and its drive shaft extends into the winding box and drivesly engages with the reducer.

[0008] This utility model discloses a drive assembly for use in automobiles, which controls the automatic opening and closing of a sliding door. The drive assembly includes a driver, a reducer, and a winding box. The driver generates torque, and the reducer reduces the output speed of the driver and increases the output torque, transmitting the torque to the winding wheel of the winding box. The winding wheel rotates under the torque to wind and unwind the cable. The cable is neatly arranged in the winding groove, preventing it from overlapping and tangling. During the winding and unwinding process, the cable drags the sliding door, thereby achieving the purpose of controlling the automatic opening and closing of the sliding door.

[0009] The winding reel has a cavity on its body that can accommodate the reducer, allowing the reducer to be hidden on the reel. The driver can then be directly mounted on the winding box, and the drive shaft can extend into the winding box to mate with the reducer. There is no need to increase the required dimensional space in the thickness direction of the drive assembly. Because the reducer is hidden, the overall thickness of the drive assembly (the axial dimension of the drive shaft) is reduced. This makes the drive assembly structure compact, reduces its requirements for assembly space, improves its applicability, and gives it high versatility.

[0010] Optionally, the cavity is annular and located along the center of the wheel body. The drive shaft extends into the cavity and engages with the reducer. The reducer engages with the inner wall of the cavity. Because the cavity is annular, the wheel body does not obstruct the rotational engagement between the drive shaft and the reducer during rotation. The engagement between the reducer and the inner wall of the cavity allows the engagement to remain within the cavity, avoiding the need to increase the thickness dimension due to the required fit.

[0011] Optionally, the driver is an external rotor motor, and the reducer includes a first gear and a second gear meshing with the first gear. The first gear is driven by the drive shaft, and the second gear is driven by the inner wall of the cavity. The number of teeth on the first gear is less than the number of teeth on the second gear. The reducer is a single-stage reducer. The driver transmits torque through the drive shaft, and the torque is transmitted to the second gear through the meshing of the first and second gears. The second gear then drives the winding wheel. Because the number of teeth on the first gear is less than the number of teeth on the second gear, the rotational speed of the second gear is less than that of the first gear, thus reducing the output speed of the second gear and increasing the torque to meet the rotational requirements of the winding wheel. The external rotor motor has the characteristics of low speed and high torque. Therefore, a single-stage reduction formed by the cooperation of the first and second gears can reduce the speed to the required value while generating sufficiently strong torque. In the prior art, drive assemblies generally use planetary gear reducers. However, this application uses a first gear and a second gear to form a single-stage reduction group, which reduces the number of gears and lowers the noise generated during gear meshing in the transmission process. At the same time, the reduction in the number of gears and the lower requirement for gear machining accuracy can also reduce the manufacturing cost. Therefore, the reducer can be hidden in the winding wheel.

[0012] Optionally, the first gear is mounted on the drive shaft to rotate synchronously with it. The second gear is annular, with the inner ring wall of the first gear meshing with the inner ring wall of the second gear. The outer ring wall of the second gear engages with the outer annular inner wall of the cavity, allowing them to rotate synchronously. The first gear, mounted on the drive shaft, rotates with it, eliminating the need for a transmission structure between them, thus reducing power loss and noise. The cavity is annular with two annular inner walls, the outer one being closer to the outer surface of the wheel. The second gear is designed to engage with the outer annular inner wall, which more easily drives the winding wheel to rotate compared to engaging with the inner annular inner wall. During transmission, the first gear remains in a fixed position with the drive shaft, while the second gear, through meshing, drives the winding wheel to rotate. Various forms of engagement are possible, such as gear meshing, spline engagement, and cam engagement, all ensuring synchronous rotation between the second gear and the winding wheel.

[0013] Optionally, the second gear component is formed on the outer annular inner wall of the cavity. The second gear component is actually a plurality of teeth that can mesh with the first gear component, and can be formed during the winding wheel processing. The first gear component directly meshes with the outer annular inner wall of the cavity, which can reduce the overall number of parts and simplify assembly.

[0014] Optionally, the winding box includes a first box body and a second box body that covers the first box body. A rotating shaft is provided between the first box body and the second box body. The wheel body includes an axially arranged central hole, and the cavity is located on the side of the central hole. The wheel body is fitted onto the rotating shaft through the central hole and is radially positioned by the rotating shaft. Under the radial positioning action of the rotating shaft, the winding wheel and the reducer can be positioned, ensuring stable transmission between the reducer and the driver, stable rotational movement of the winding wheel, and enabling the electric sliding door to move smoothly.

[0015] Optionally, the rotating shaft is provided with a radially protruding assembly part, and the inner wall of the central hole is provided with a connecting part that mates with the assembly part. Bearings are provided at both ends of the rotating shaft located at the assembly part. The first housing and the second housing are respectively provided with a first recess and a second recess corresponding to the two bearings. The outer ring of one bearing is interference-fitted with the inner wall of the first recess and the inner ring is axially abutted against one end of the assembly part. The outer ring of the other bearing is interference-fitted with the inner wall of the second recess and the inner ring is axially abutted against the other end of the assembly part.

[0016] Optionally, a bearing is fitted onto the rotating shaft. The first housing and the second housing are respectively provided with a first positioning hole and a second positioning hole at both ends of the rotating shaft. One end of the rotating shaft is inserted into the first positioning hole, and the other end of the rotating shaft is inserted into the second positioning hole. The inner ring of the bearing is interference-fitted with the rotating shaft, and the outer ring of the bearing is interference-fitted with the inner wall of the central hole. A radially protruding limiting member is provided on the rotating shaft near the second housing. The limiting member is used to axially limit the bearing, and the inner ring of the bearing is clamped between the limiting member and the first housing.

[0017] Optionally, the driver includes a housing, within which a rotor and a stator are housed. A portion of the drive shaft is located within the housing and rotates synchronously with the rotor. The winding box has a through hole corresponding to the drive shaft for insertion. The winding box also has multiple first mounting holes, and the housing has multiple second mounting holes. The driver is fixed to the winding box by fasteners that pass through the first mounting holes and lock into the second mounting holes. By providing multiple first and second mounting holes and securing them with fasteners, a tight fit between the driver and the winding box can be achieved, preventing relative movement between them that could affect the transmission between the driver and the reducer.

[0018] Optionally, the driver is a brushless motor, and the drive assembly further includes a controller electrically connected to the driver for controlling the driver's operation. The controller includes a circuit board and a Hall effect sensor. The Hall effect sensor is located inside the driver and fixedly mounted on the stator. The circuit board is mounted on the winding box, located on the side of the driver. Signal interaction is established between the circuit board and the Hall effect sensor. The brushless motor needs to detect changes in the internal magnetic field through the Hall effect sensor to adjust the current direction. The position of the Hall effect sensor within the driver needs to remain constant to detect the rotor's magnetic field and determine the rotor's real-time position, providing a commutation signal to achieve orderly switching of the stator winding current, ensuring continuous and stable rotation of the driver. Because the Hall effect sensor is fixedly mounted to the stator, its position relative to the driver can remain relatively fixed, avoiding changes in the relative position of the Hall effect sensor and the driver, which could affect the Hall effect sensor's magnetic field sensing error and the driver's control accuracy. The circuit board can interact with the Hall effect sensor to generate control signals acting on the driver, and the circuit board is mounted on the winding box, enabling synchronous assembly and disassembly of the winding box, controller, driver, and reducer.

[0019] Optionally, the circuit board is mounted on the sliding door body or the vehicle body, and the Hall effect sensor is fixedly mounted on the stator. The controller also includes a signal interaction interface, which is connected to both the circuit board and the Hall effect sensor to establish signal interaction between them. The circuit board and the Hall effect sensor are mounted on different structures, reducing the assembly space required for the drive assembly by eliminating the need for a circuit board on the winding box, thus improving the versatility of the drive assembly.

[0020] Optionally, the circuit board is mounted on the winding box at the side of the driver. A portion of the circuit board extends into the driver and remains relatively fixed to it. The Hall effect sensor is disposed on the portion of the circuit board extending into the driver. Because the circuit board is fixed to the winding box and can remain relatively fixed to it, its relative position to the driver can also remain unchanged. This ensures that the position of the Hall effect sensor disposed on the circuit board within the driver remains unchanged, so that the Hall effect sensor's sensing of the magnetic field is not affected. Since the Hall effect sensor is disposed on the circuit board and there is no fixed fit between it and the driver, it is not necessary to remove or replace the entire driver when the Hall effect sensor malfunctions.

[0021] An electric sliding door for automobiles includes a door body and a slider disposed on the door body. A slide rail is provided on the vehicle body corresponding to the slider and slides in cooperation with it. The door also includes the aforementioned drive assembly, which is mounted on the vehicle body. The two ends of a pull cable are respectively connected to both sides of the slider. The electric sliding door for automobiles disclosed in this utility model possesses all the beneficial effects of the aforementioned drive assembly, which will not be elaborated further here.

[0022] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the drive assembly in this utility model.

[0025] Figure 2 This is an exploded view of the drive assembly in this utility model.

[0026] Figure 3 This is an exploded view of the drive assembly with a single bearing and a hidden first housing in this utility model.

[0027] Figure 4 This is a cross-sectional view of the dual-bearing drive assembly in this utility model.

[0028] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0029] Figure 6 This is a schematic diagram of the winding wheel of the dual-bearing drive assembly in this utility model.

[0030] Figure 7 This is a cross-sectional view of the single-bearing drive assembly in this utility model.

[0031] Figure 8 This is a schematic diagram of the structure of the first box in this utility model.

[0032] Figure 9 This is a schematic diagram showing the connection between the circuit board and the Hall plate of a drive assembly in this utility model.

[0033] Figure 10 This is a schematic diagram showing the connection between the circuit board and the Hall plate of another drive assembly in this utility model.

[0034] Figure 11 This is a schematic diagram showing the connection between the circuit board and the Hall plate of another drive assembly in this invention.

[0035] Figure 12 This is a schematic diagram showing the connection between the circuit board and the Hall plate of another drive assembly in this invention.

[0036] Figure label:

[0037] Driver 100, housing 110, drive shaft 120, second mounting hole 130;

[0038] Controller 200, circuit board 210, hole 211, signal interaction interface 220, external output interface 230, Hall plate 240, cover plate 250, wire harness assembly 260, wire harness plug 261;

[0039] The components include: a winding box 300, a first box body 301, a first recessed hole 3011, a first positioning hole 3012, a second box body 302, a second recessed hole 3021, a second positioning hole 3022, a winding wheel 310, a wheel body 311, a winding groove 312, a cavity 313, a center hole 314, a connector 315, a rotating shaft 320, an assembly part 321, a limiting part 322, a bearing 330, a through hole 340, a first mounting hole 350, a first surrounding edge 360, an assembly area 361, a second surrounding edge 370, a cavity 371, a circuit board support post 372, a protruding post 3721, a first notch 373, a second notch 374, a guide wheel 380, and a sleeve 390.

[0040] First gear component 400, second gear component 410;

[0041] Fastener 500. Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0043] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0044] Reference Figures 1 to 10This utility model discloses a drive assembly for an electric sliding door of an automobile. The drive assembly is used to drive the sliding door to slide, realizing the automatic opening and closing of the sliding door. The drive assembly includes a driver 100, a reducer, a controller 200, and a winding box 300. The winding box 300 is provided with a rotatable winding wheel 310 and a pull cable (not shown in the figure) wound on the winding wheel 310. The driver 100 can output torque and provide it to the winding box 300. The reducer can reduce the output speed of the driver 100 and increase the output torque of the driver 100, and transmit the enhanced torque to the winding wheel 310 of the winding box 300. The winding wheel 310 can rotate under the action of torque to wind and unwind the pull cable. During the winding and unwinding process, the pull cable can drag the sliding door to slide, thereby achieving the purpose of controlling the automatic opening and closing of the sliding door. The controller 200 interacts with the driver 100 and controls the operation of the driver 100 during the sliding of the sliding door.

[0045] The driver 100 includes a housing 110, a stator, a rotor, and a drive shaft 120. The stator and rotor are mounted on the housing 110. The drive shaft 120 extends out of the housing 110 and outputs torque to the outside. The rotor can rotate relative to the stator to drive the drive shaft 120 to rotate.

[0046] The winding wheel 310 includes a wheel body 311 and a winding groove 312 disposed on the outer circumferential surface of the wheel body 311 for positioning the pull wire. The pull wire can be wound into the winding groove 312 during the winding process and arranged in an orderly manner, avoiding the pull wires from overlapping and intersecting, which would cause knots.

[0047] The wheel body 311 has a cavity 313, in which the reducer is housed and drives the wheel body 311. The driver 100 is mounted on the winding box 300, and its drive shaft 120 extends into the winding box 300 and drives the reducer. The reducer can be hidden on the wheel body 311 and can be mounted in the winding box 300 together with the winding wheel 310. Therefore, the driver 100 can be directly mounted on the winding box 300, and the drive shaft 120 can extend into the winding box 300 and engage with the reducer within the winding box 300. There is no need to increase the dimensional space required for the engagement in the thickness direction of the drive assembly. Because the reducer is hidden, the overall thickness dimension of the drive assembly (the axial dimension of the drive shaft 120) is reduced. This makes the drive assembly structure compact, reduces its requirements for assembly space, improves its applicability, and has high versatility.

[0048] Reference Figure 3 and Figure 6Based on the above embodiments, in one embodiment of this utility model, the cavity 313 is annular and arranged along the center of the wheel 311. The drive shaft 120 extends into the cavity 313 and engages with the reducer. The reducer engages with the inner wall of the cavity 313. Because the cavity 313 is annular, the wheel 311 will not obstruct the rotational engagement between the drive shaft 120 and the reducer during rotation. The engagement between the reducer and the inner wall of the cavity 313 allows the engagement between the two to be within the range of the cavity 313, thus avoiding the need to increase the thickness dimension due to the engagement requirements.

[0049] Among them, the driver 100 is an external rotor motor, whose rotor is set on the outer periphery of the stator. Compared with the internal rotor motor, the external rotor motor can increase the rotor diameter without changing the size, and has a longer electromagnetic lever arm. With the input power unchanged, it can output a larger torque to the winding wheel 310, ensuring that the sliding door can be subjected to a larger force to stably realize automatic opening and closing, and avoiding the failure of the sliding door to lock due to insufficient force to drag the sliding door.

[0050] The reducer includes a first gear component 400 and a second gear component 410 meshing with the first gear component 400. The first gear component 400 is in transmission engagement with the drive shaft 120, and the second gear component 410 is in transmission engagement with the inner wall of the cavity 313. The number of teeth of the first gear component 400 is less than the number of teeth of the second gear component 410.

[0051] The reducer described above is a single-stage reducer. The driver 100 transmits torque through the drive shaft 120. The torque is transmitted to the second gear 410 through the meshing of the first gear 400 and the second gear 410. The second gear 410 then drives the winding wheel 310. Since the number of teeth of the first gear 400 is less than the number of teeth of the second gear 410, the rotational speed of the second gear 410 is less than the rotational speed of the first gear 400. This reduces the output speed of the second gear 410 and increases the torque, thus meeting the rotational requirements of the winding wheel 310.

[0052] The external rotor motor has the characteristics of low speed and high torque. Therefore, the speed can be reduced to the required value while generating sufficient torque by only one-stage reduction formed by the cooperation of the first gear component 400 and the second gear component 410. In the prior art, the drive assembly generally uses a planetary gear reducer. However, the use of the first gear component 400 and the second gear component 410 to form a single-stage reduction group in this application reduces the number of gears, thereby reducing the noise generated by the gear meshing process during transmission. At the same time, the reduction in the number of gears and the lower requirement for gear machining accuracy can also reduce the manufacturing cost. Therefore, the reducer can be hidden in the winding wheel 310.

[0053] Reference Figure 3 and Figure 6Based on the above embodiments, in one embodiment of this utility model, the specific structure of the reducer is disclosed.

[0054] The first gear 400 is mounted on the drive shaft 120 to rotate synchronously with the drive shaft 120. The second gear 410 is annular (actually an internal gear ring). The first gear 400 meshes with the inner ring wall of the second gear 410. The outer ring wall of the second gear 410 engages with the outer annular inner wall of the cavity 313, so that the two can rotate synchronously.

[0055] The first gear 400 is mounted on the drive shaft 120 and can rotate with it. There is no transmission structure between them, reducing power loss and noise. The cavity 313 is annular and has two annular inner walls. The outer annular inner wall is the one closer to the outer side of the wheel body 311. The second gear 410 is designed to mesh with the outer annular inner wall, which allows for easier rotation of the winding wheel 310 compared to meshing with the inner annular inner wall. During transmission, the first gear 400 remains in a fixed position with the drive shaft 120, while the second gear 410 drives the winding wheel 310 to rotate under the action of meshing.

[0056] There are various types of mating mechanisms, such as gear meshing, spline engagement, and cam engagement, all of which can ensure that the second gear 410 rotates synchronously with the winding wheel 310. For example... Figure 3 As shown in this application, the second gear component 410 and the winding wheel 310 adopt a spline-like engagement. Multiple protruding structures are provided on the outer periphery of the second gear component 410, and multiple recessed grooves are provided on the outer annular inner wall of the cavity 313. The protruding structures can be inserted into the grooves.

[0057] The first gear component 400 is integrally formed on the drive shaft 120 (i.e., the tooth structure is formed on the drive shaft 120), or it can be assembled on the drive shaft 120 by means of splines or the like.

[0058] In addition, the second gear component can also be formed on the outer annular inner wall of the cavity. That is, the second gear component is actually a plurality of toothed structures that can cooperate with the first gear component. It can be formed during the winding wheel processing. The first gear component directly meshes with the outer annular inner wall of the cavity. This can reduce the overall number of parts and simplify assembly.

[0059] Reference Figure 4 , Figure 5 and Figure 7Based on the above embodiments, in one embodiment of the present invention, the winding box 300 includes a first box body 301 and a second box body 302 that covers the first box body 301. A rotating shaft 320 is provided between the first box body 301 and the second box body 302. The wheel body 311 includes an axially arranged central hole 314. A cavity 313 is arranged around the central hole 314. The wheel body 311 is fitted onto the rotating shaft 320 through the central hole 314 and is radially positioned by the rotating shaft 320.

[0060] Under the radial positioning action of the rotating shaft 320, the winding wheel 310 can be positioned, and the second gear 410, which is set in the cavity 313 and cooperates with the winding wheel 310, can also be positioned. Since the driver 100 is fixedly connected to the winding box 300, the position of the first gear 400 is fixed, so as to ensure the stable transmission between the reducer and the driver 100 and the stable rotation of the winding wheel 310, so that the electric sliding door can move smoothly.

[0061] To ensure that the winding wheel 310 rotates smoothly and steadily, a bearing 330 is provided on the shaft 320.

[0062] Reference Figures 4 to 6 Based on the above embodiments, in one embodiment of this utility model, two bearings 330 are provided on the rotating shaft 320.

[0063] The rotating shaft 320 is provided with a radially protruding assembly part 321. The inner wall of the central hole 314 is provided with a connecting part 315 that is in concave-convex fit with the assembly part 321. Two bearings 330 are respectively provided on the rotating shaft 320 at both ends of the assembly part 321. The first housing 301 and the second housing 302 are respectively provided with a first recess 3011 and a second recess 3021 corresponding to the two bearings 330. The outer ring of one bearing 330 is in interference fit with the inner wall of the first recess 3011, and the inner ring is axially abutting one end of the assembly part 321. The outer ring of the other bearing 330 is in interference fit with the inner wall of the second recess 3021, and the inner ring is axially abutting the other end of the assembly part 321.

[0064] The first recess 3011 and the second recess 3021 are used to install and position two bearings 330, which are of the same model and size. The outer diameter of the assembly part 321 is larger than the outer diameter of the inner ring of the bearing 330 but smaller than the inner diameter of the outer ring. The first housing 301 and the second housing 302 abut against the ends of the outer rings of the two bearings 330 and maintain a certain distance from the inner rings. Under the pressure of the first housing 301 and the second housing 302, the inner rings of the two bearings 330 abut against the ends of the assembly part 321. Therefore, the rotating shaft 320 can drive the inner rings of the bearings 330 to rotate freely relative to the first housing 301 and the second housing 302. The two bearings 330 are not pressed on the connecting member 315, so the winding wheel 310 can rotate smoothly.

[0065] After the drive assembly is installed on the vehicle body, its vertical arrangement—the axis of the winding wheel 310 is horizontal. The winding wheel 310 has a force that applies pressure to the bearing 330 in the radial direction, but this force has a low influence on the relative rotation of the inner and outer rings of the bearing 330, so the winding wheel 310 can still rotate smoothly.

[0066] Reference Figure 3 and Figure 7 Unlike the above embodiments, in another embodiment of this utility model, the number of bearings 330 on the rotating shaft 320 is one.

[0067] The first housing 301 and the second housing 302 are respectively provided with a first positioning hole 3012 and a second positioning hole 3022 at both ends of the rotating shaft 320. One end of the rotating shaft 320 is inserted into the first positioning hole 3012 and the other end of the rotating shaft 320 is inserted into the second positioning hole 3022. The inner ring of the bearing 330 is interference-fitted with the rotating shaft 320, and the outer ring of the bearing 330 is interference-fitted with the inner wall of the center hole 314. A radially protruding limiting member 322 is provided on the rotating shaft 320 near the second housing 302. The limiting member 322 is used to axially limit the bearing 330. The inner ring of the bearing 330 is clamped between the limiting member 322 and the first housing 301.

[0068] The area around the first positioning hole 3012 on the first housing 301 protrudes towards the bearing 330 and presses against the inner ring of the bearing 330, so that the inner ring of the bearing 330 is clamped between it and the limiting member, while the outer ring of the bearing 330 does not contact the winding box 300 and the rotating shaft 320, so the outer ring can rotate freely and the winding wheel 310 can rotate smoothly.

[0069] Reference Figure 2 and Figure 8 Based on the above embodiments, in one embodiment of this utility model, the mounting structure of the driver 100 is specifically disclosed.

[0070] The driver 100 is mounted on the first housing 301. The first housing 301 has a through hole 340 for the drive shaft 120 to be inserted. Part of the drive shaft 120 is located inside the outer casing 110 and rotates synchronously with the rotor. The other part of the drive shaft 120 is inserted into the winding box 300 through the through hole 340 and extends into the cavity 313. The first housing 301 has a plurality of first mounting holes 350, and the outer casing 110 has a plurality of second mounting holes 130. The driver 100 is fixed to the winding box 300 by fasteners 500 that pass through the first mounting holes 350 and lock into the second mounting holes 130.

[0071] The first mounting hole 350 is a through hole, the second mounting hole 130 is a threaded hole, and the fastener 500 is a bolt.

[0072] In addition, both the first and second mounting holes can be configured as through holes, and the fasteners are bolts. The fasteners pass through the first mounting hole and the second mounting hole in sequence, then through the first housing body, and are then locked in place with the nuts.

[0073] Multiple sets of first mounting holes 350 and second mounting holes 130 are provided so that multiple parts of the outer periphery of the housing 110 can be fixedly connected to the winding box 300. The driver 100 and the winding box 300 fit tightly together, avoiding relative movement between the two and affecting the transmission between the driver 100 and the reducer.

[0074] Reference Figure 2 and Figure 8 Based on the above embodiments, in one embodiment of this utility model, the first housing 301 is further provided with a first mounting part. The first mounting part is used to position the driver 100. The first mounting part stops the housing 110 in the radial direction of the drive shaft 120 to position the driver 100. Under the action of the first mounting part, the driver 100 cannot move in the radial direction of the drive shaft 120. The first mounting hole 350 and the second mounting hole 130 can be aligned before the fastener 500 is installed. At the same time, it can also prevent the driver 100 from changing position during the installation of the fastener 500, which would cause it to misalign with the first mounting hole 350 and the second mounting hole 130. This facilitates the assembly of the driver 100 and improves the stability of the driver 100.

[0075] The first mounting portion can also assist in the installation of the driver 100 by positioning the driver 100 itself. Specifically, the first mounting portion includes a first perimeter 360 protruding axially from the first housing 301 along the drive shaft 120. The first perimeter 360 is arranged circumferentially along the through hole 340 to form an assembly area 361 adapted to the housing 110. The housing 110 is fitted into the assembly area 361 (from...). Figure 4 (As can be seen from the image). When installing the driver 100 onto the winding box 300, the drive shaft 120 can be aligned with the through hole 340 and inserted first, and then the housing 110 can be fitted into the assembly area 361. The first perimeter 360 is used to stop and position the housing 110, thus completing the pre-installation of the driver 100.

[0076] The assembly area 361 enclosed by the first perimeter 360 is a circular region that matches the shape of the outer shell 110. The side of the outer shell 110 has an outwardly protruding structure (from... Figure 2 As can be clearly seen in the image, the first mounting hole 350 is provided on this protruding structure, and the position of this protruding structure is a certain distance from the end of the housing 110 facing the winding box 300, so as not to interfere with the fitting of the housing 110 and the assembly area 361.

[0077] The outer side of the first perimeter 360 also has an outward protruding structure (from... Figure 2 As can be clearly seen, the second mounting hole 130 is set on the protruding structure of the first perimeter 360. The protruding structure on the outer shell 110 and the protruding structure on the first perimeter 360 can offset each other to avoid the fastener 500 being partially exposed between the outer shell 110 and the first box 301, thus affecting the aesthetics of the drive assembly.

[0078] Reference Figure 4 , Figure 8 and Figure 9 Based on the above embodiments, in one embodiment of this utility model, the driver 100 is a brushless motor, the controller 200 includes a circuit board 210 and a Hall component, the Hall component is located inside the driver 100 and is relatively fixed to the driver 100, the circuit board 210 is mounted on the winding box 300 and located on the side of the driver 100, and a signal interaction is established between the circuit board 210 and the Hall component.

[0079] Brushless motors require Hall effect sensors to detect changes in the internal magnetic field and adjust the current direction. The position of the Hall effect sensor within the driver 100 must remain constant to detect the rotor's magnetic field, determine the rotor's real-time position, and provide a commutation signal to achieve orderly switching of the stator winding current, ensuring continuous and stable rotation of the driver 100. The position of the Hall effect sensor relative to the driver 100 must be kept relatively fixed to avoid changes in their relative positions, which could affect the Hall effect sensor's magnetic field sensing error and thus the control accuracy of the driver 100.

[0080] The circuit board 210 can interact with the Hall effect components to generate control signals that act on the driver 100. The circuit board 210 is mounted on the winding box 300, which enables the synchronous assembly and disassembly of the winding box 300, the controller 200, the driver 100, and the reducer.

[0081] The controller 200 also includes an interface component. The first housing 301 is also provided with a second mounting part adjacent to the first mounting part. The second mounting part is used to position the circuit board 210 and the interface component of the controller 200, so that the position of the controller 200 on the winding box 300 is stable and the connection stability between the controller 200 and the driver 100 is improved.

[0082] The interface components include a signal interaction interface 220 and an external output interface 230. The Hall component is a Hall plate 240 installed inside the driver 100 and fixed to the stator. The signal interaction interface 220 is installed on the circuit board 210 and electrically connected to the Hall plate 240 to establish signal interaction between the circuit board 210 and the Hall plate 240. The external output interface 230 is electrically connected to the circuit board 210 and is used to establish signal interaction with external devices (such as the vehicle's infotainment system).

[0083] The second mounting section includes a second perimeter 370 protruding axially from the first housing 301 along the drive shaft 120. The second perimeter 370 forms a cavity 371 for accommodating the circuit board 210 and the interface assembly. The cavity 371 contains a plurality of circuit board support posts 372 that support and position the circuit board 210. These support posts 372 in the cavity 371 support and position the circuit board 210, ensuring its fixation while preventing it from touching the surface of the first housing 301, thus maintaining a gap between them for heat dissipation. Figure 4 As can be seen, the circuit board 210 is located in the middle of the cavity 371, and the ample space inside the cavity 371 also allows for the arrangement of larger electronic components on the circuit board 210.

[0084] The circuit board 210 has several holes 211. The end of the circuit board support post 372 is provided with a protrusion 3721 corresponding to the hole 211. The protrusion 3721 can pass through the hole 211 to position the circuit board 210, so as to facilitate the fixed installation of the circuit board 210.

[0085] A first notch 373 is provided on the side of the second perimeter 370 facing the driver 100, and a second notch 374 is also provided on the second perimeter 370 corresponding to the external output interface 230. The first notch 373 is positioned facing the driver 100, which can shorten the data line used to establish signal interaction between the two. At the same time, the first notch 373 also facilitates the installation and arrangement of the signal interaction interface 220. The signal interaction interface 220 can even be directly connected to the Hall plate 240 without the aid of a data line. The second notch 374 is provided corresponding to the external output interface 230 to facilitate the connection of external lines to the external output interface 230.

[0086] The controller 200 also includes a cover plate 250 that covers the second perimeter 370. The cover plate 250 and the second perimeter 370 can protect the circuit board 210 from being directly exposed and damaged by bumps or other reasons.

[0087] Reference Figure 11 Unlike the above embodiments, in another embodiment of this utility model, the circuit board 210 and the Hall plate 240 establish signal interaction through the wire harness assembly 260. One end of the wire harness assembly 260 extends from the first notch 373 into the cavity 371 and is plugged into the wire harness plug 261 on the circuit board 210. The other end extends into the driver 100 and is connected to the Hall plate 240 by soldering pins.

[0088] like Figure 12As shown, unlike the above embodiments, in another embodiment of this utility model, the Hall component is a Hall element, the circuit board 210 extends out of the cavity 371 from the first notch 373 and extends into the driver 100, the Hall element is fixed on the part of the circuit board 210 that extends into the driver 100, and the interface component is an external output interface 230 that is electrically connected to the circuit board 210.

[0089] Because the circuit board 210 is installed in the cavity 371 and can remain relatively fixed with the winding box 300, the circuit board 210 can also remain relatively fixed with the controller 200, allowing the Hall element to remain in a fixed position within the driver 100 for accurate detection of magnetic field changes. Since the Hall element is mounted on the circuit board 210 and there is no fixed connection between it and the driver 100, it is not necessary to remove or replace the entire driver when a problem occurs with the Hall element.

[0090] Reference Figure 10 Unlike the above embodiments, in another embodiment of this utility model, the winding box 300 does not have the second mounting part disclosed in the above embodiments. The circuit board 210 and the drive assembly are separately arranged. The circuit board 210 is installed on the side sliding door or the car body. The Hall component is a Hall plate 240 fixedly installed on the stator. The interface component is a signal interaction interface 220 that is electrically connected to the Hall plate 240 through a data line. The circuit board 210 is connected to the Hall plate 240 through the signal interaction interface 220 via a data line to perform signal interaction.

[0091] In this embodiment, the circuit board 210 and the Hall plate 240 are mounted on different structures. Since the circuit board 210 does not need to be mounted on the winding box 300, the assembly space required for the drive assembly is reduced, and the versatility of the drive assembly is improved.

[0092] Reference Figure 1 and Figure 3 Based on the above embodiments, in one embodiment of this utility model, the winding box 300 is further provided with two guide wheels 380 and two sleeves 390. The two sleeves 390 correspond to the two guide wheels 380 respectively. The two ends of the pull wire wound on the winding wheel 310 pass through a guide wheel 380 and then through the sleeve 390.

[0093] A pull line is wound on the winding wheel 310. When the winding wheel 310 rotates, one end of the pull line is pulled towards the winding wheel 310, while the other end is released and moves away from the winding wheel 310. The two ends of the pull line are fixed to the sides of the slider on the side sliding door, so that the slider can be dragged to slide and thus drag the side sliding door. When the winding wheel 310 reverses, the side sliding door moves in the opposite direction.

[0094] The guide wheel 380 guides the cable and prevents friction between the cable and other internal components during the winding process of the winding wheel 310, which could cause the cable to break or the winding box 300 to crack. The sleeve 390 protects the cable and prevents it from being damaged by friction with other structures on the vehicle body.

[0095] This utility model also discloses an electric sliding door for automobiles, including the drive assembly disclosed in the above embodiments. The electric sliding door for automobiles has all the beneficial effects of the drive assembly in the above embodiments, which will not be repeated here.

[0096] The electric sliding door for automobiles includes a door body and a slider mounted on the door body. A slide rail is provided on the vehicle body corresponding to the slider, and the door also includes the drive assembly disclosed in the above-mentioned solution. The drive assembly is mounted on the vehicle body, and the two ends of a pull cable are connected to the two sides of the slider. The pull cable, under the rotation of the winding wheel 310, pulls the slider to slide on the slide rail, causing the door body to slide and achieve automatic opening and closing.

[0097] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A drive assembly for an electric sliding door of an automobile, comprising a winding box (300), a driver (100), and a reducer, wherein the winding box (300) is provided with a rotatable winding wheel (310) and a pull cable wound on the winding wheel (310), the pull cable being used to drag the sliding door body to slide, and the reducer being used to transmit the torque of the driver (100) to the winding wheel (310), characterized in that, The winding wheel (310) includes a wheel body (311) and a winding groove (312) disposed on the outer circumferential surface of the wheel body (311) for positioning the pull wire. The wheel body (311) is provided with a cavity (313). The reducer is housed in the cavity (313) and drives the wheel body (311). The driver (100) is mounted on the winding box (300) and its drive shaft (120) extends into the winding box (300) and drives the reducer.

2. The drive assembly for an electric sliding door of an automobile according to claim 1, characterized in that, The cavity (313) is annular and arranged along the center of the wheel body (311). The drive shaft (120) extends into the cavity (313) and is in transmission cooperation with the reducer. The reducer is in transmission cooperation with the inner wall of the cavity (313).

3. The drive assembly for an electric sliding door of an automobile according to claim 2, characterized in that, The driver (100) is an external rotor motor, and the reducer includes a first gear (400) and a second gear (410) meshing with the first gear (400). The first gear (400) is in transmission engagement with the drive shaft (120), and the second gear (410) is in transmission engagement with the inner wall of the cavity (313). The number of teeth of the first gear (400) is less than the number of teeth of the second gear (410).

4. The drive assembly for an electric sliding door of an automobile according to claim 3, characterized in that, The first gear (400) is mounted on the drive shaft (120) to rotate synchronously with the drive shaft (120). The second gear (410) is annular. The first gear (400) meshes with the inner ring wall of the second gear (410). The outer ring wall of the second gear (410) is in concave-convex fit with the outer annular inner wall of the cavity (313) so that the two can rotate synchronously. Alternatively, the second gear component (410) is formed on the outer annular inner wall of the cavity (313).

5. The drive assembly for an electric sliding door of an automobile according to claim 1, characterized in that, The winding box (300) includes a first box body (301) and a second box body (302) that covers the first box body (301). A rotating shaft (320) is provided between the first box body (301) and the second box body (302). The wheel body (311) includes an axially arranged central hole (314). The cavity (313) is provided on the side of the central hole (314). The wheel body (311) is fitted onto the rotating shaft (320) through the central hole (314) and is radially positioned by the rotating shaft (320).

6. The drive assembly for an electric sliding door of an automobile according to claim 5, characterized in that, The rotating shaft (320) is provided with a radially protruding assembly part (321). The inner wall of the central hole (314) is provided with a connecting part (315) that is in concave-convex fit with the assembly part (321). The rotating shaft (320) is provided with bearings (330) at both ends of the assembly part (321). The first box (301) and the second box (302) are respectively provided with a first concave hole (3011) and a second concave hole (3021) corresponding to the two bearings (330). The outer ring of one bearing (330) is in interference fit with the inner wall of the first concave hole (3011), and the inner ring is axially abutting one end of the assembly part (321). The outer ring of the other bearing (330) is in interference fit with the inner wall of the second concave hole (3021), and the inner ring is axially abutting the other end of the assembly part (321).

7. The drive assembly for an electric sliding door of an automobile according to claim 5, characterized in that, A bearing (330) is fitted on the rotating shaft (320). The first housing (301) and the second housing (302) are respectively provided with a first positioning hole (3012) and a second positioning hole (3022) at the two ends of the rotating shaft (320). One end of the rotating shaft (320) is inserted into the first positioning hole (3012), and the other end of the rotating shaft (320) is inserted into the second positioning hole (3022). The inner ring of the bearing (330) is interference-fitted with the rotating shaft (320), and the outer ring of the bearing (330) is interference-fitted with the inner wall of the center hole (314). A radially protruding limiting member is provided on the rotating shaft (320) near the second housing (302). The limiting member is used to axially limit the bearing (330). The inner ring of the bearing (330) is clamped between the limiting member and the first housing (301).

8. The drive assembly for an electric sliding door of an automobile according to any one of claims 1 to 7, characterized in that, The driver (100) includes a housing (110), in which a rotor and a stator are provided. A portion of the drive shaft (120) is located inside the housing (110) and rotates synchronously with the rotor. The winding box (300) has a through hole (340) corresponding to the drive shaft (120) for insertion of the drive shaft (120). The winding box (300) also has a plurality of first mounting holes (350). The housing (110) has a plurality of second mounting holes (130). The driver (100) is fixed to the winding box (300) by fasteners (500) that pass through the first mounting holes (350) and lock into the second mounting holes (130).

9. The drive assembly for an electric sliding door of an automobile according to claim 8, characterized in that, The driver (100) is a brushless motor. The drive assembly also includes a controller (200). The controller (200) is electrically connected to the driver (100) for controlling the operation of the driver (100). The controller (200) includes a circuit board (210) and a Hall component (240). The Hall component (240) is located inside the driver (100) and fixedly mounted on the stator. The circuit board (210) is mounted on the winding box (300) on the side of the driver (100). Signal interaction is established between the circuit board (210) and the Hall component (240). Alternatively, the circuit board (210) is mounted on the sliding door or the vehicle body, the Hall component (240) is fixedly mounted on the stator, and the controller (200) further includes a signal interaction interface (220), which is connected to the circuit board (210) and the Hall component (240) respectively to establish signal interaction between the two. Alternatively, the circuit board (210) is mounted on the winding box (300) on the side of the driver (100), a portion of the circuit board (210) extends into the driver (100) and remains relatively fixed to the driver (100), and the portion of the circuit board (210) extending into the driver (100) is provided with the Hall component (240).

10. An electric sliding door for automobiles, comprising a door body and a slider disposed on the door body, wherein a slide rail is provided on the vehicle body corresponding to the slider and slidingly engaging with the slider, characterized in that, It also includes the drive assembly as described in any one of claims 1 to 9, the drive assembly being mounted on the vehicle body, and the two ends of the pull cable being respectively connected to both sides of the slider.

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