Rotary drive device, side door drive assembly and automobile body

Abstract

This invention provides a rotary drive device, a side door drive assembly, and an automobile body. The rotary drive device includes a housing, a motor assembly, and a reducer. Both the motor assembly and the reducer are housed within the housing. The reducer is a planetary gear reducer. The rotary drive device also includes an oil baffle, which comprises an oil baffle plate and multiple fixed parts distributed circumferentially and connected to the oil baffle plate. The oil baffle plate is positioned between the gear ring of the reducer and the stator winding of the motor assembly. The multiple fixed parts are all fixedly connected to the gear ring. A shaft clearance hole is formed in the oil baffle plate, and one end of the rotor shaft of the motor assembly passes through the shaft clearance hole and is fixedly connected to the sun gear of the reducer. In this invention, the oil baffle, through its multiple circumferentially distributed fixed parts, is fixedly connected to the gear ring, which improves the deformation resistance of the gear ring. Furthermore, the oil baffle plate prevents lubricating grease from the reducer from flowing into the motor assembly, ensuring the service life and stability of the rotary drive device.

Description

Technical Field

[0001] This utility model relates to the field of automotive equipment, specifically to a rotary drive device, a side door drive assembly, and an automotive body. Background Technology

[0002] In vehicles with larger and wider bodies, sliding doors are typically used on both sides of the rear passenger area to ensure smooth entry and exit and to prevent the doors from being restricted by the surrounding space. Compared with traditional rotating side doors, sliding doors can be smoothly pushed open and pulled open even when the vehicle is in a confined space, ensuring a better user experience.

[0003] To further optimize the user experience, a motor can also be installed on the side of the vehicle to drive the side door to open and close automatically. Specifically, the motor and reducer drive an actuator (such as a cable pull mechanism) to move the side door linearly. However, existing automotive side door drive motors often cannot simultaneously achieve miniaturization and stability of the internal structure of the motor.

[0004] Therefore, how to provide a compact and stable side door motor has become a technical problem that urgently needs to be solved in this field. 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 rotary drive device, a side door drive assembly, and an automobile body. The rotary drive device is equipped with an oil baffle, which can improve the deformation resistance of the gear ring and prevent lubricating grease in the reducer from flowing into the motor assembly, thus ensuring the service life and stability of the rotary drive device.

[0006] To achieve the above objectives, as one aspect of this utility model, a rotary drive device is provided, including a housing, a motor assembly, and a reducer. Both the motor assembly and the reducer are disposed within the housing. The reducer is a planetary gear reducer. The rotary drive device further includes an oil baffle, which comprises an oil baffle plate and a plurality of fixed portions distributed circumferentially and connected to the oil baffle plate. The oil baffle plate is disposed between the gear ring of the reducer and the stator winding of the motor assembly. The plurality of fixed portions are fixedly connected to the gear ring. A shaft clearance hole is formed in the oil baffle plate, and one end of the rotor shaft of the motor assembly passes through the shaft clearance hole and is fixedly connected to the sun gear of the reducer.

[0007] Optionally, the gear ring has multiple slots on the side facing the stator winding, and the multiple fixing parts are correspondingly accommodated in the multiple slots.

[0008] Optionally, a baffle receiving groove is formed on the side of the gear ring facing the stator winding, the baffle receiving groove is connected to the inner wall of the gear ring, the slot is formed at the bottom of the receiving groove, and the edge of the oil baffle is received in the baffle receiving groove.

[0009] Optionally, the oil baffle can be made of metal, such as aluminum alloy or stainless steel.

[0010] Optionally, the fixing part is connected to the outer edge of the oil baffle, and the thickness of the fixing part is the same as the thickness of the oil baffle.

[0011] Optionally, the fixing part is rectangular in shape.

[0012] Optionally, the plurality of fixing parts are evenly distributed circumferentially.

[0013] Optionally, the number of fixing parts is 6 to 20.

[0014] Optionally, the number of fixing parts is 10.

[0015] Optionally, the rotary drive device further includes a first limiting ball, which is rotatably disposed between the end face of the rotor shaft and the portion of the reducer opposite to the end face of the rotor shaft, such that there is a gap between the end face of the rotor shaft and the portion of the reducer opposite to the end face of the rotor shaft, wherein the position of the first limiting ball in the rotary drive device remains unchanged.

[0016] Optionally, the end face of the rotor shaft facing the reducer is formed with a first limiting groove, and the first limiting ball is partially accommodated in the first limiting groove, and / or

[0017] A second limiting groove is formed on the surface of the central shaft or planetary carrier of the reducer facing the rotor shaft, and the first limiting ball is partially accommodated in the second limiting groove.

[0018] Optionally, the housing includes a housing base and a top cover. The motor assembly and the reducer are both disposed in the housing base. The top of the housing base has a top opening. The top cover is fixedly connected to the housing base and closes the top opening. An output through hole is formed on the top cover. The output shaft of the reducer passes through the output through hole to the outside of the housing.

[0019] Optionally, the top cover has a top bearing groove on the side facing the motor assembly, and the output through hole extends from the bottom of the top bearing groove to the outer surface of the top cover; the rotary drive device also includes an output bearing, the outer ring structure of the output bearing is disposed in the top bearing groove, and the inner ring structure of the output bearing is sleeved on the output shaft of the reducer.

[0020] Optionally, the inner wall of the housing has multiple positioning grooves, and the gear ring of the reducer includes a gear ring body and multiple positioning protrusions. The multiple positioning protrusions are distributed on the outer side of the gear ring body, and the multiple positioning protrusions are respectively accommodated in the multiple positioning grooves.

[0021] Optionally, the reducer includes at least one planetary assembly, which includes a central shaft, a planet carrier, a ring gear, a sun gear, and a plurality of planetary gears. The central shaft is fixedly disposed on the side of the planet carrier opposite to the motor assembly. The plurality of planetary gears are movably disposed on the planet carrier and distributed around the axis of the central shaft. The ring gear is sleeved on the outside of the plurality of planetary gears and meshes with the plurality of planetary gears, and the ring gear is fixedly disposed in the housing. The first limiting ball is disposed between the rotor shaft and the planet carrier of the reducer.

[0022] Optionally, the bottom of the top cover has an annular positioning boss that extends around the output through hole, is housed inside the housing, and abuts against the top surface of the gear ring.

[0023] Optionally, the output bearing is a deep groove ball bearing.

[0024] Optionally, the planetary assembly further includes multiple gear shafts, each gear shaft comprising an assembly section, a mating section, and a limiting section connected sequentially along its length and with increasing diameters. The planetary carrier has multiple gear mounting holes, and the planetary gears have gear limiting holes and gear mating holes connected sequentially along their axial direction. The gear shaft passes through the gear limiting holes and the gear mating holes sequentially and is fixed in the gear mounting holes. The assembly section is accommodated in the gear mating holes, and the limiting section is accommodated in the gear limiting holes.

[0025] Optionally, the central shaft and the planetary carrier are integrally formed by powder metallurgy.

[0026] Optionally, the first limiting ball is made of steel.

[0027] Optionally, the motor assembly includes the rotor shaft, a magnetic element, a stator core, and multiple stator windings. The magnetic element is sleeved on the rotor shaft and has multiple magnetic poles distributed circumferentially. The stator core surrounds the magnetic element and is fixedly disposed in the housing. The multiple stator windings are distributed circumferentially and are all wound around the stator core. The stator windings can generate a magnetic field when energized to drive the magnetic element to rotate the rotor shaft.

[0028] Optionally, the stator core includes a plurality of stator laminations stacked along the axial direction. Each stator lamination includes a connecting ring and a winding portion distributed circumferentially and connected to the outside of the connecting ring. The plurality of stator windings are respectively wound on the winding portions of the plurality of stator laminations at corresponding positions.

[0029] Optionally, the motor assembly further includes a top stator support and a bottom stator support. The top stator support is disposed on the side of the stator core facing the reducer and covers the surface of the stator core facing the reducer. The bottom stator support is disposed on the side of the stator core away from the reducer and covers the surface of the stator core away from the reducer. The plurality of stator windings are respectively wound on the winding portions of the plurality of stator laminations and on the top stator support and the bottom stator support on both sides.

[0030] Optionally, the motor assembly further includes a stator end cover, which is disposed on the side of the stator core facing the reducer. The stator end cover is fixedly connected to the housing, and the edge of the stator end cover contacts the inner wall of the housing. The oil baffle is disposed between the gear ring and the stator end cover. One end of the rotor shaft passes through the stator end cover and the oil baffle in sequence and is connected to the reducer.

[0031] Optionally, the motor assembly further includes a top bearing, the stator end cover having a top bearing groove on the side facing the stator core, the outer ring structure of the top bearing being fixedly disposed in the top bearing groove, and the inner ring structure of the top bearing being sleeved on the stator shaft.

[0032] Optionally, the top bearing is a deep groove ball bearing.

[0033] Optionally, the stator end cover is fixedly connected to the bottom wall of the housing by mounting fasteners.

[0034] Optionally, the stator lamination further includes multiple winding mounting portions connected to the outside of the winding portion. The winding mounting portions have stator mounting through holes formed therein. The mounting fasteners pass through the stator end cover and the multiple stator mounting through holes of the stator core in sequence and are fixedly connected to the bottom wall of the housing.

[0035] Optionally, the motor assembly further includes a bottom bearing, the bottom wall of the housing has a bottom bearing groove, the outer ring structure of the bottom bearing is fixedly disposed in the bottom bearing groove, and the inner ring structure of the bottom bearing is sleeved on the stator shaft.

[0036] Optionally, the bottom bearing is a deep groove ball bearing.

[0037] Optionally, the bottom wall of the housing also has an assembly through hole, which extends from the bottom of the bottom bearing groove to the outside of the housing.

[0038] Optionally, the motor assembly includes a rotor shaft, a magnetic coil, a magnetic coil frame, a stator core, and multiple stator windings. The stator core is arranged around the rotor shaft, and the multiple stator windings are distributed circumferentially and wound around the stator core. The magnetic coil is arranged around the outside of the stator core and has multiple magnetic poles distributed circumferentially. The magnetic coil frame is connected between the magnetic coil and the rotor shaft. The stator windings can generate a magnetic field when energized to drive the magnetic coil to rotate the magnetic coil frame and the rotor shaft.

[0039] Optionally, the inner wall of the housing opposite to the reducer has a mounting sleeve extending along the axial direction of the rotor shaft. The stator winding is sleeved on the mounting sleeve. The motor assembly also includes multiple rotor bearings. The outer ring structure of the multiple rotor bearings is fixed in the mounting sleeve, and the inner ring structure of the multiple rotor bearings is sleeved on the stator shaft.

[0040] Optionally, the rotor bearing is a deep groove ball bearing.

[0041] Optionally, the motor assembly further includes at least one first bearing washer, which is sleeved on the rotor shaft and stacked between the outer ring structures of adjacent rotor bearings.

[0042] Optionally, the motor assembly further includes a second bearing washer, which is sleeved on the rotor shaft and stacked between the magnetic coil frame and the inner ring structure of the adjacent rotor bearing.

[0043] Optionally, the motor assembly further includes an elastic retaining ring, an annular groove is formed on the rotor shaft, the elastic retaining ring is disposed in the annular groove and abuts against the bottom of the inner ring structure of the lowest end of the rotor bearing.

[0044] Optionally, the magnetic ring includes a magnetic pole fixing cylinder and a plurality of magnetic parts. The magnetic pole fixing cylinder is arranged around the outside of the stator core, and one end of the magnetic pole fixing cylinder facing the reducer is fixedly connected to the magnetic ring frame. The plurality of magnetic parts are fixedly arranged on the inner wall of the fixing cylinder and distributed circumferentially, and the plurality of magnetic parts form the plurality of magnetic poles of the magnetic ring.

[0045] Optionally, the magnetic coil frame includes a frame plate, a first mating cylinder, and a second mating cylinder. The frame plate is disposed between the stator core and the reducer. The rotor shaft passes through the frame plate. The first mating cylinder and the second mating cylinder are both fixed to the side of the frame plate facing the stator core. The second mating cylinder is arranged around the outside of the first mating cylinder. The first mating cylinder is sleeved on the rotor shaft. The outer side wall of the second mating cylinder contacts and is fixedly connected to the inner side wall of the magnetic pole fixing cylinder.

[0046] Optionally, the bottom wall of the housing also has an assembly through hole, which connects the mounting cylinder to the outside of the housing.

[0047] As a second aspect of this utility model, a side door drive assembly is provided, including an actuator and the aforementioned rotary drive device. The rotary drive device is fixedly connected to one of the side door and the passenger compartment of a vehicle. The actuator is connected to the other of the side door and the passenger compartment. The actuator is connected to the output shaft of the reducer in the rotary drive device and is capable of converting the rotational motion of the reducer output shaft into a sliding motion of the side door relative to the passenger compartment.

[0048] As a third aspect of this utility model, a car body is provided, including a passenger compartment and at least one side door, the side door being disposed on the side of the passenger compartment and movably connected to the passenger compartment, the car body further including the aforementioned side door drive assembly, the side door drive assembly being connected between the side door and the passenger compartment.

[0049] In the rotary drive device, side door drive assembly, and vehicle body provided by this utility model, the reducer of the rotary drive device is a planetary gear reducer. One end of the rotor shaft is inserted into the reducer and fixedly connected to the sun gear of the reducer. As the rotor shaft and the sun gear rotate, the planetary gears rotate on their own axes and revolve around the ring gear under the meshing action, thereby driving the planetary carrier and the output shaft of the reducer to rotate, thus achieving the transmission effect of reducing speed and increasing torque. Moreover, the planetary gear reducer and the motor assembly are both cylindrical structures with the output shaft located in the center, which can effectively reduce the overall size of the brushless motor, thereby saving wiring space in the vehicle side door drive area.

[0050] Furthermore, the rotary drive device also includes an oil baffle, which is fixedly connected to the gear ring through multiple fixed parts distributed circumferentially. This fixes the oil baffle, a planar structure, to the bottom of the gear ring, allowing it to reinforce the spokes of the wheel, improve the gear ring's resistance to deformation, and enhance the stability of the internal structure of the rotary drive device. In addition, the oil baffle also acts as an oil barrier, separating the motor assembly from the reducer and preventing lubricating grease from flowing between the components of the reducer into the motor assembly. This ensures the smooth operation and transmission effect of the motor assembly, as well as the service life of the components in the reducer, further guaranteeing the stability of the internal structure of the rotary drive device. Attached Figure Description

[0051] The present invention will be further described below with reference to the accompanying drawings:

[0052] Figure 1 This is a disassembled structural diagram of the rotary drive device provided in this embodiment of the utility model;

[0053] Figure 2 This is a schematic diagram of the assembly relationship between the oil baffle and the gear ring in the rotary drive device provided in this embodiment of the utility model;

[0054] Figure 3 This is a schematic diagram of the internal structure of a rotary drive device provided in one embodiment of the present invention;

[0055] Figure 4 yes Figure 2 A cross-sectional schematic diagram of the rotating drive device;

[0056] Figure 5 This is a schematic diagram of the internal structure of a rotary drive device provided in another embodiment of the present invention;

[0057] Figure 6 yes Figure 5 A cross-sectional schematic diagram of the rotating drive device;

[0058] Figure 7 This is a partial structural diagram of a car body provided in one embodiment of the present invention;

[0059] Figure 8 This is a partial structural diagram of a car body provided in another embodiment of the present invention.

[0060] Explanation of reference numerals in the attached figures:

[0061] Housing 100; Housing base 110; Positioning groove 111; Mounting cylinder 112; Top cover 120; Annular positioning boss 121; Motor assembly 200; Circuit board 201; Control cable 202; Rotor shaft 210; Magnetic component 220; Stator core 230; Winding mounting part 231; Stator winding 240; Top stator bracket 251; Bottom stator bracket 252; Stator end cover 260; Top bearing 271; Bottom bearing 272; Rotor bearing 273; First bearing washer 274; Second bearing washer 275; Elastic retaining ring 276; Magnetic ring 280 ; Magnetic pole fixing cylinder 281; Magnetic part 282; Magnetic ring frame 290; Reducer 300; Central shaft 310; Planetary carrier 320; Gear mounting hole 321; First weight reduction hole 322; Bearing clearance groove 323; Gear ring 330; Gear ring body 331; Positioning protrusion 332; Baffle receiving groove 333; Planetary gear 340; Second weight reduction hole 341; Gear shaft 350; Assembly section 351; Mating section 352; Limiting section 353; Output bearing 410; First limiting ball 510; Oil baffle 600; Oil baffle plate 610; Fixing part 620. Detailed Implementation

[0062] 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.

[0063] 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.

[0064] In related technologies, a planetary gear reducer is used to connect to the rotor shaft of the motor assembly. The output shaft of the planetary gear reducer is also located at the center of the rotor shaft, and integrating it with the motor as a single structure can effectively reduce the overall size of the device. However, in this device, the gear ring of the planetary gear reducer often deforms after prolonged use. Furthermore, since the planetary gear reducer and the motor assembly are located in the same housing, lubricating grease from the reducer can easily enter the motor structure, causing abnormal changes in the damping of the motor assembly, affecting the motor speed and transmission performance. In addition, problems such as lubricating grease loss and changes in oil film thickness can also occur in the reducer, affecting the lifespan of components in the reducer and resulting in poor overall stability of the device.

[0065] To address the aforementioned technical problems, as one aspect of this utility model, a rotary drive device is provided, such as... Figures 1 to 6As shown, the rotary drive device includes a housing 100, a motor assembly 200, and a reducer 300. Both the motor assembly 200 and the reducer 300 are disposed in the housing 100. The reducer 300 is a planetary gear reducer. The rotary drive device also includes an oil baffle 600, which includes an oil baffle plate 610 and a plurality of fixing parts 620 distributed circumferentially and connected to the oil baffle plate 610. The oil baffle plate 610 is disposed between the gear ring 330 of the reducer 300 and the stator winding 240 of the motor assembly 200. The plurality of fixing parts 620 are fixedly connected to the gear ring 330. A shaft clearance hole is formed in the oil baffle plate 610. One end of the rotor shaft 210 of the motor assembly 200 passes through the shaft clearance hole and is fixedly connected to the sun gear of the reducer 300.

[0066] In this invention, the reducer 300 of the rotary drive device is a planetary gear reducer. One end of the rotor shaft 210 is inserted into the reducer 300 and fixedly connected to the sun gear 360 of the reducer 300. As the rotor shaft 210 and the sun gear 360 rotate, the planetary gears 340 rotate on their own axes and revolve around the ring gear 330 under the meshing action, thereby driving the planetary carrier 320 and the output shaft of the reducer 300 to rotate, thus achieving the transmission effect of reducing speed and increasing torque. Furthermore, the planetary gear reducer and the motor assembly 200 are both cylindrical structures with the output shaft located in the center, which can effectively reduce the overall size of the brushless motor, thereby saving wiring space in the vehicle side door transmission area.

[0067] Furthermore, the rotary drive device also includes an oil baffle 600, which is fixedly connected to the gear ring 330 via multiple circumferentially distributed fixing parts 620. This fixes the planar structure of the oil baffle 610 to the bottom of the gear ring 330, allowing the oil baffle 610 to act as a reinforcement for the spokes in the wheel, improving the deformation resistance of the gear ring 330 and enhancing the stability of the internal structure of the rotary drive device. In addition, the oil baffle 610 can also act as an oil barrier to separate the motor assembly 200 from the reducer 300, preventing lubricating grease between the components in the reducer 300 from flowing into the motor assembly 200. This ensures the smooth operation and transmission effect of the motor assembly 200, as well as the service life of the components in the reducer 300, further guaranteeing the stability of the internal structure of the rotary drive device.

[0068] In some embodiments of this utility model, the fixing part 620 can be fixed to the gear ring 330 by means of snap-fit ​​connection, welding, bonding, assembly connection, etc.

[0069] To facilitate the disassembly and assembly of the oil baffle 600, in a preferred embodiment of this utility model, the oil baffle 600 and the gear ring 330 can be connected by a plug-in connection. Specifically, the gear ring 330 has multiple slots on the side facing the stator winding 240, and multiple fixing parts 620 are correspondingly accommodated in the multiple slots.

[0070] As a preferred embodiment of this utility model, such as Figures 5 to 6 As shown, a baffle receiving groove 333 is formed on the side of the gear ring 330 facing the stator winding 240. The baffle receiving groove 333 is connected to the inner wall of the gear ring 330. A slot is formed at the bottom of the receiving groove, and the edge of the oil baffle 610 is received in the baffle receiving groove 333.

[0071] In this embodiment of the utility model, a baffle receiving groove 333 is formed at the bottom of the gear ring 330, so that the oil baffle 610 and the gear ring 330 share the axial space, which further shortens the overall size of the rotary drive device while ensuring the structural strength of the gear ring 330.

[0072] Optionally, the oil baffle 600 can be made of metal materials, such as aluminum alloy or stainless steel.

[0073] As a preferred embodiment of this utility model, such as Figures 1 to 6 As shown, the fixing part 620 is connected to the outer edge of the oil baffle 610, and the thickness of the fixing part 620 is the same as the thickness of the oil baffle 610.

[0074] In this embodiment of the utility model, the fixing part 620 also adopts a sheet structure and the thickness is the same as that of the oil baffle 610, so the oil baffle 600 can be formed by sheet metal process, that is, multiple fixing parts 620 are bent from the initial position coplanar with the oil baffle 610 to the upright state.

[0075] Optionally, such as Figure 2 As shown, the fixing part 620 is rectangular in shape.

[0076] Preferably, such as Figure 2 As shown, multiple fixing parts 620 are evenly distributed circumferentially to improve the uniformity of the gear ring's strength along the circumferential direction.

[0077] Optionally, the number of fixing parts 620 is 6 to 20.

[0078] Optionally, such as Figure 2 As shown, there are 10 fixing parts 620.

[0079] Preferably, such as Figures 3 to 6 As shown, the rotary drive device also includes a first limiting ball 510, which is rotatably disposed between the end face of the rotor shaft 210 and the portion of the reducer 300 opposite to the end face of the rotor shaft 210, so that there is a gap between the end face of the rotor shaft 210 and the portion of the reducer 300 opposite to the end face of the rotor shaft 210. The position of the first limiting ball 510 in the rotary drive device remains unchanged.

[0080] In this embodiment of the invention, a first limiting ball 510 is provided between the end face of the rotor shaft 210 and the components of the reducer 300. Thus, even if the rotor shaft 210 and the components of the reducer 300 are made axially adjacent in order to shorten the axial dimension of the rotary drive device, the first limiting ball 510 can be used to maintain an axial gap between the rotor shaft 210 and the components of the reducer 300, thereby reducing the friction between the rotor shaft 210 and the components of the reducer 300, and thus ensuring the transmission efficiency of the rotary drive device and the internal structural stability of the rotary drive device.

[0081] Optionally, such as Figures 3 to 6 As shown, a first limiting groove is formed on the end face of the rotor shaft 210 facing the reducer 300, and a first limiting ball 510 is partially accommodated in the first limiting groove, and / or

[0082] A second limiting groove is formed on the surface of the central shaft 310 or planetary carrier 320 of the reducer 300 facing the rotor shaft 210, and the first limiting ball 510 is partially accommodated in the second limiting groove.

[0083] In this embodiment of the present invention, a first limiting ball 510 is provided between the rotor shaft 210 of the motor assembly 200 and the components of the reducer 300, and at least one of the rotor shaft 210 and the components of the reducer 300 is grooved at the position corresponding to the first limiting ball 510. The positional stability of the first limiting ball 510 is maintained by the first limiting groove at the top of the rotor shaft 210 and / or the second limiting groove at the bottom of the reducer 300.

[0084] As an optional embodiment of this utility model, the sun gear 360 of the reducer 300 is integrated with the rotor shaft 210, that is, the rotor shaft 210 is a splined shaft, which meshes with multiple planetary gears 340 through the spline at the top of the rotor shaft 210.

[0085] Optionally, such as Figure 1 , Figures 3 to 6 As shown, the housing 100 includes a housing base 110 and a top cover 120. The motor assembly 200 and the reducer 300 are both disposed in the housing base 110. The top of the housing base 110 has a housing top opening. The top cover 120 is fixedly connected to the housing base 110 and closes the housing top opening. An output through hole is formed on the top cover 120. The output shaft of the reducer 300 passes through the output through hole to the outside of the housing 100.

[0086] Optionally, such as Figures 3 to 6 As shown, the top cover 120 has a top bearing groove on the side facing the motor assembly 200, and the output through hole extends from the bottom of the top bearing groove to the outer surface of the top cover 120; the rotary drive device also includes an output bearing 410, the outer ring structure of the output bearing 410 is disposed in the top bearing groove, and the inner ring structure of the output bearing 410 is sleeved on the output shaft of the reducer 300.

[0087] Optionally, the inner wall of the housing 110 has a plurality of positioning grooves 111, and the gear ring 330 of the reducer 300 includes a gear ring body 331 and a plurality of positioning protrusions 332. The plurality of positioning protrusions 332 are distributed on the outer side of the gear ring body 331, and the plurality of positioning protrusions 332 are respectively accommodated in the plurality of positioning grooves 111.

[0088] Optionally, such as Figure 1 , Figures 3 to 6 As shown, the reducer 300 includes at least one planetary assembly, which includes a central shaft 310, a planet carrier 320, a ring gear 330, a sun gear 360, and multiple planetary gears 340. The central shaft 310 is fixedly disposed on the side of the planet carrier 320 away from the motor assembly 200. The multiple planetary gears 340 are movably disposed on the planet carrier 320 and distributed around the axis of the central shaft 310. The ring gear 330 is sleeved on the outside of the multiple planetary gears 340 and meshes with the multiple planetary gears 340, and the ring gear 330 is fixedly disposed in the housing 100. The rotor shaft 210 is fixedly connected to the sun gear 360 closest to the rotor shaft 210 in the reducer 300. A first limiting ball 510 is disposed between the rotor shaft 210 and the planet carrier 320 closest to the rotor shaft 210 in the reducer 300.

[0089] Understandably, when the reducer 300 includes multiple planetary assemblies, the central shaft 310 of the outermost planetary assembly extends out of the housing 100 and forms the output shaft of the reducer 300. The first limiting ball 510 is disposed between the rotor shaft 210 and the planet carrier 320 closest to the rotor shaft 210. Correspondingly, the second limiting groove is formed at the bottom of the planet carrier 320 closest to the rotor shaft 210.

[0090] Optionally, such as Figures 3 to 6 As shown, the bottom of the top cover 120 has an annular positioning boss 121, which extends around the output through hole. The annular positioning boss 121 is accommodated inside the housing 110 and abuts against the top surface of the gear ring 330.

[0091] Optionally, the output bearing 410 is a deep groove ball bearing.

[0092] To improve the overall axial structural compactness of the rotary drive device, preferably, as follows: Figure 1 As shown, at least one planetary carrier 320 has a bearing clearance groove 323 on the side opposite to the motor assembly 200, and the output bearing 410 is partially accommodated in the corresponding bearing clearance groove 323.

[0093] Optionally, such as Figures 3 to 6As shown, the planetary assembly also includes multiple gear shafts 350. Each gear shaft 350 includes an assembly section 351, a mating section 352, and a limiting section 353 that are connected sequentially along its length and whose diameters increase sequentially. The planet carrier 320 has multiple gear mounting holes 321, and the planetary gear 340 has gear limiting holes and gear mating holes that are connected sequentially along its axial direction. The gear shaft 350 passes through the gear limiting holes and gear mating holes sequentially and is fixed in the gear mounting holes 321. The assembly section 351 is accommodated in the gear mating hole, and the limiting section 353 is accommodated in the gear limiting hole.

[0094] In this embodiment of the utility model, the shaft hole of the planetary gear 340 adopts a countersunk design, and the assembly section 351 and the limiting section 353 of the gear shaft 350 are both hidden inside the planetary gear 340, thereby further shortening the overall axial dimension of the reducer 300 and improving the overall axial structural compactness of the rotary drive device.

[0095] To reduce the overall weight of the rotary drive device, preferably, such as Figure 1 As shown, a plurality of first weight reduction holes 322 are formed in the planetary carrier 320. The plurality of first weight reduction holes 322 are disposed between adjacent gear mounting holes 321. The first weight reduction holes 322 penetrate the planetary carrier 320 along the axial direction of the central shaft 310 and extend circumferentially around the central shaft 310, thereby reducing the weight of the planetary carrier 320 components and thus reducing the overall weight of the rotary drive device, which is beneficial to achieving lightweighting of the vehicle side door structure.

[0096] To further reduce the overall weight of the rotary drive device, preferably, such as Figure 1 As shown, a plurality of second weight-reducing holes 341 are formed in the planetary gear 340. The second weight-reducing holes 341 penetrate the planetary gear 340 along the axial direction of the gear shaft 350. The plurality of second weight-reducing holes 341 are distributed circumferentially around the gear shaft 350 and extend circumferentially.

[0097] In some embodiments of this invention, the central shaft 310 can be inserted into the central hole of the planetary carrier 320, in which case the central shaft 310 and the rotor shaft 210 abut against each other via the first limiting ball 510. Correspondingly, a second limiting groove can be formed on the side of the central shaft 310 facing the rotor shaft 210.

[0098] Preferably, such as Figures 3 to 6 As shown, the central shaft 310 and the planetary carrier 320 are formed into one piece by powder metallurgy.

[0099] In this embodiment of the utility model, the central shaft 310 and the planetary carrier 320 are formed into one piece by powder metallurgy. Compared with the scheme of assembling or welding the central shaft 310 and the planetary carrier 320, this can effectively improve the coaxiality between the central shaft 310 and the rotor shaft 210, and improve the stability of the internal structure of the reducer 300, thereby ensuring the stability and smoothness of the operation of the rotary drive device.

[0100] In one optional embodiment of this utility model, the first limiting ball 510 is made of steel. That is, the first limiting ball 510 is a steel ball.

[0101] To further improve the compactness of the vehicle side door structure, as a preferred embodiment of this utility model, such as Figures 3 to 6 As shown, motor assembly 200 is a brushless motor.

[0102] In related technologies, the motor of the side door usually adopts a brushed motor structure. When the user manually pushes and pulls the side door, the brushed motor will reverse under the action of external force and generate a large resistance to the side door under the action of stator inductance. In order to eliminate this resistance, an additional clutch structure is often required between the motor and the actuator, resulting in a large overall size of the side door structure.

[0103] In this embodiment of the utility model, the motor assembly 200 is a brushless motor. The resistance generated by the brushless motor when reversing is much smaller than that of the brushed motor. Therefore, the rotary drive device can be directly connected to the actuator, eliminating the need for structures such as clutches, and further improving the compactness of the vehicle side door structure.

[0104] As an optional embodiment of this utility model, the motor assembly 200 can be an internal rotor motor, specifically, as shown in the example below. Figures 3 to 4 As shown, the motor assembly 200 includes a rotor shaft 210, a magnetic element 220, a stator core 230, and multiple stator windings 240. The magnetic element 220 is sleeved on the rotor shaft 210 and has multiple magnetic poles distributed circumferentially. The stator core 230 surrounds the magnetic element 220 and is fixedly disposed in the housing 100. The multiple stator windings 240 are distributed circumferentially and are all wound on the stator core 230. The stator windings 240 can generate a magnetic field when energized to drive the magnetic element 220 to rotate the rotor shaft 210.

[0105] Optionally, the stator core 230 includes a plurality of stator laminations stacked along the axial direction. Each stator lamination includes a connecting ring and a winding portion distributed circumferentially and connected to the outside of the connecting ring. A plurality of stator windings 240 are respectively wound on the winding portions of the plurality of stator laminations at corresponding positions.

[0106] Optionally, such as Figures 3 to 4As shown, the motor assembly 200 also includes a top stator support 251 and a bottom stator support 252. The top stator support 251 is disposed on the side of the stator core 230 facing the reducer 300 and covers the surface of the stator core 230 facing the reducer 300. The bottom stator support 252 is disposed on the side of the stator core 230 away from the reducer 300 and covers the surface of the stator core 230 away from the reducer 300. Multiple stator windings 240 are respectively wound on the winding portion of multiple stator laminations and on the top stator support 251 and the bottom stator support 252 on both sides.

[0107] Optionally, such as Figures 3 to 4 As shown, the motor assembly 200 also includes a stator end cover 260, which is disposed on the side of the stator core 230 facing the reducer 300. The stator end cover 260 is fixedly connected to the housing 100, and the edge of the stator end cover 260 contacts the inner wall of the housing 100. An oil baffle 610 is disposed between the gear ring 330 and the stator end cover 260. One end of the rotor shaft 210 passes through the stator end cover 260 and the oil baffle 610 in sequence and is connected to the reducer 300.

[0108] Optionally, such as Figures 3 to 4 As shown, the motor assembly 200 also includes a top bearing 271. The stator end cover 260 has a top bearing groove on the side facing the stator core 230. The outer ring structure of the top bearing 271 is fixedly installed in the top bearing groove, and the inner ring structure of the top bearing 271 is sleeved on the stator shaft.

[0109] Optionally, the top bearing 271 is a deep groove ball bearing.

[0110] Optionally, such as Figures 3 to 4 As shown, the stator end cover 260 is fixedly connected to the bottom wall of the housing 100 by mounting fasteners.

[0111] Optionally, such as Figures 3 to 4 As shown, the stator lamination also includes multiple winding mounting portions 231. The winding mounting portions 231 are connected to the outside of the winding portion. Stator mounting through holes are formed in the winding mounting portions 231. Mounting fasteners pass through the multiple stator mounting through holes of the stator end cover 260 and the stator core 230 in sequence and are fixedly connected to the bottom wall of the housing 100.

[0112] Optionally, such as Figures 3 to 4 As shown, the motor assembly 200 also includes a bottom bearing 272. The bottom wall of the housing 100 has a bottom bearing groove. The outer ring structure of the bottom bearing 272 is fixedly installed in the bottom bearing groove, and the inner ring structure of the bottom bearing 272 is sleeved on the stator shaft.

[0113] Optionally, the bottom bearing 272 is a deep groove ball bearing.

[0114] Optionally, such as Figures 3 to 4As shown, the bottom wall of the housing 100 also has an assembly through hole, which extends from the bottom of the bottom bearing groove to the outside of the housing 100.

[0115] As another optional embodiment of this utility model, the motor assembly 200 can also be an external rotor motor, specifically, as shown in the example below. Figures 5 to 6 As shown, the motor assembly 200 includes a rotor shaft 210, a magnetic coil 280, a magnetic coil frame 290, a stator core 230, and multiple stator windings 240. The stator core 230 is arranged around the rotor shaft 210. The multiple stator windings 240 are distributed circumferentially and are all wound on the stator core 230. The magnetic coil 280 is arranged around the outside of the stator core 230 and has multiple magnetic poles distributed circumferentially. The magnetic coil frame 290 is connected between the magnetic coil 280 and the rotor shaft 210. The stator windings 240 can generate a magnetic field when energized to drive the magnetic coil 280 to drive the magnetic coil frame 290 and the rotor shaft 210 to rotate.

[0116] Optionally, such as Figures 5 to 6 As shown, the inner wall of the housing 100 on the side opposite to the reducer 300 has a mounting sleeve 112 extending along the axial direction of the rotor shaft 210. The stator winding 240 is sleeved on the mounting sleeve 112. The motor assembly 200 also includes multiple rotor bearings 273. The outer ring structure of the multiple rotor bearings 273 is fixed in the mounting sleeve 112, and the inner ring structure of the multiple rotor bearings 273 is sleeved on the stator shaft.

[0117] Optionally, rotor bearing 273 is a deep groove ball bearing.

[0118] Optionally, such as Figures 5 to 6 As shown, the motor assembly 200 also includes at least one first bearing washer 274, which is sleeved on the rotor shaft 210 and stacked between the outer ring structures of adjacent rotor bearings 273.

[0119] Optionally, such as Figures 5 to 6 As shown, the motor assembly 200 also includes a second bearing washer 275, which is sleeved on the rotor shaft 210 and stacked between the magnetic coil frame 290 and the inner ring structure of its adjacent rotor bearing 273.

[0120] Optionally, such as Figures 5 to 6 As shown, the motor assembly 200 also includes an elastic retaining ring 276. An annular groove is formed on the rotor shaft 210, and the elastic retaining ring 276 is disposed in the annular groove and abuts against the bottom of the inner ring structure of the lowest rotor bearing 273.

[0121] Optionally, such as Figures 5 to 6As shown, the magnetic coil 280 includes a magnetic pole fixing cylinder 281 and a plurality of magnetic parts 282. The magnetic pole fixing cylinder 281 is arranged around the outside of the stator core 230, and the end of the magnetic pole fixing cylinder 281 facing the reducer 300 is fixedly connected to the magnetic coil frame 290. The plurality of magnetic parts 282 are fixedly arranged on the inner wall of the fixing cylinder and distributed circumferentially, and the plurality of magnetic parts 282 form a plurality of magnetic poles of the magnetic coil 280.

[0122] Optionally, such as Figures 5 to 6 As shown, the magnetic coil frame 290 includes a frame plate, a first mating cylinder, and a second mating cylinder. The frame plate is disposed between the stator core 230 and the reducer 300. The rotor shaft 210 passes through the frame plate. The first mating cylinder and the second mating cylinder are both fixed to the side of the frame plate facing the stator core 230. The second mating cylinder is arranged around the outside of the first mating cylinder. The first mating cylinder is sleeved on the rotor shaft 210. The outer side wall of the second mating cylinder contacts and is fixedly connected to the inner side wall of the magnetic pole fixing cylinder 281.

[0123] Optionally, such as Figures 5 to 6 As shown, the bottom wall of the housing 100 also has an assembly through hole, which connects the mounting cylinder 112 to the outside of the housing 100.

[0124] As an optional embodiment of this utility model, such as Figures 3 to 6 As shown, the motor assembly 200 also includes a circuit board 201, which is disposed between the stator core 230 and the bottom wall of the housing 100, and is electrically connected to the stator winding 240.

[0125] Optionally, such as Figures 3 to 6 As shown, the motor assembly 200 also includes a control cable 202. The first end of the control cable 202 is electrically connected to the circuit board 201, and the second end of the control cable 202 extends out of the housing 100 through the cable hole on the housing 100. The control cable 202 is used to connect to the control components on the vehicle so that the control components can control the rotary drive device to work through electrical signals to realize automatic opening and closing of the car door.

[0126] Optionally, such as Figures 3 to 6 As shown, the second end of the control cable 202 is connected to a plug, which can be quickly plugged into a socket on the side door or the passenger compartment of the car, so as to facilitate the quick installation of the rotary drive device provided in this embodiment of the utility model on the vehicle body structure.

[0127] As a second aspect of this utility model, a side door drive assembly is provided, including an actuator and a rotary drive device provided in the embodiments of this utility model. The rotary drive device is fixedly connected to one of the side door and the passenger compartment of a car, and the actuator is connected to the other of the side door and the passenger compartment. The actuator is connected to the output shaft of the reducer 300 in the rotary drive device and is capable of converting the rotational movement of the output shaft of the reducer 300 into the sliding movement of the side door relative to the passenger compartment.

[0128] As an optional embodiment of this utility model, the actuator can be a wire pull mechanism. Specifically, the actuator may include a wire pull, a first wire and a second wire. The wire pull is connected to the output shaft of the reducer 300. The rotary drive device is disposed on one of the side door and the carriage. The first end of the first wire and the first end of the second wire are both wound on the wire pull, and the winding directions of the first wire and the second wire on the wire pull are opposite. The second end of the first wire and the second end of the second wire are both fixedly disposed on the other of the side door and the carriage, and the second end of the first wire and the second end of the second wire are respectively located on both sides of the wire pull.

[0129] Taking a rotary drive device installed on the carriage, with the second end of the first cable and the second end of the second cable connected to the side door as an example, when it is necessary to control the door to move to one side, the rotary drive device can be controlled to drive the pulley to rotate in a certain direction, so that the pulley tightens the first cable and releases the second cable, and the second end of the first cable pulls the door to that side; when it is necessary to control the door to move to the other side, the rotary drive device can be controlled to drive the pulley to rotate in the other direction, so that the pulley tightens the second cable and releases the first cable, and the second end of the second cable pulls the door to the other side in the opposite direction.

[0130] As an optional embodiment of this utility model, the actuator can also be a transmission pair in the form of a pulley. Specifically, the actuator includes a driving wheel, a driven wheel, a flexible traction belt, and a connecting seat. The driving wheel is connected to the output shaft of the reducer 300. The rotary drive device and the driven wheel are disposed on one of the side door and the carriage. The flexible traction belt is wound around the driving wheel and the driven wheel. The connecting seat is fixedly disposed on the flexible traction belt and connected to the other of the side door and the carriage. The rotary drive device can drive the driving wheel to rotate and drive the flexible traction belt and the connecting seat disposed on it to move together, thereby driving the side door and the carriage to slide relative to each other.

[0131] Alternatively, the flexible tension belt can be a belt, wire harness, or chain.

[0132] As an optional embodiment of this utility model, the actuator can also be a gear and rack transmission pair. Specifically, the actuator includes a guide rack and a mating gear. The mating gear meshes with the guide rack and is connected to the output shaft of the reducer 300. The guide rack is used to connect with one of the side door and the carriage, and the rotary drive device is used to connect with the other of the side door and the carriage.

[0133] As a third aspect of this utility model, a car body is provided, such as... Figure 7 , Figure 8 As shown, the vehicle body includes a passenger compartment 10 and at least one side door 20. The side door 20 is disposed on the side of the passenger compartment 10 and is movably connected to the passenger compartment 10. The vehicle body also includes a side door drive assembly 30 provided in this embodiment of the present invention, which is connected between the side door 20 and the passenger compartment 10.

[0134] Optionally, such as Figure 7 , Figure 8 As shown, the side of the carriage 10 is provided with a top guide rail 12, a middle guide rail 13 and a bottom guide rail 14. The top guide rail 12, the middle guide rail 13 and the bottom guide rail 14 all extend in the horizontal direction and are located at the top, side and bottom of the entrance and exit 11 on the side of the carriage 10, respectively. The side door 20 is movably disposed on the top guide rail 12, the middle guide rail 13 and the bottom guide rail 14 and can slide horizontally along the guide direction of the guide rail to selectively open or close the entrance and exit 11.

[0135] As an optional embodiment of this utility model, such as Figure 7 As shown, the position of the side door drive assembly 30 corresponds to the position of the middle guide rail 13, that is, its height is between the top guide rail 12 and the bottom guide rail 14, and it is located on the same side of the entrance and exit 11 as the middle guide rail 13.

[0136] As another optional embodiment of this utility model, such as Figure 8 As shown, the position of the side door drive assembly 30 corresponds to the bottom guide rail 14, that is, its height is below the entrance / exit 11.

[0137] 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 rotary drive device comprising a housing (100), a motor assembly (200) and a speed reducer (300), the motor assembly (200) and the speed reducer (300) are each provided in the housing (100), characterized in that, The reducer (300) is a planetary gear reducer. The rotary drive device also includes an oil baffle (600). The oil baffle (600) includes an oil baffle plate (610) and a plurality of fixing parts (620) distributed circumferentially and connected to the oil baffle plate (610). The oil baffle plate (610) is disposed between the gear ring (330) of the reducer (300) and the stator winding (240) of the motor assembly (200). The plurality of fixing parts (620) are fixedly connected to the gear ring (330). A shaft clearance hole is formed in the oil baffle plate (610). One end of the rotor shaft (210) of the motor assembly (200) passes through the shaft clearance hole and is fixedly connected to the sun gear (360) of the reducer (300).

2. The rotary drive device according to claim 1, characterized in that The gear ring (330) has a plurality of slots on the side facing the stator winding (240), and the plurality of fixing parts (620) are accommodated in the plurality of slots in a corresponding manner.

3. The rotary drive device according to claim 2, characterized in that A baffle receiving groove (333) is formed on the side of the gear ring (330) facing the stator winding (240). The baffle receiving groove (333) is connected to the inner wall of the gear ring (330). The slot is formed at the bottom of the receiving groove. The edge of the oil baffle (610) is received in the baffle receiving groove (333).

4. The rotary drive device according to claim 1, characterized in that The fixing part (620) is connected to the outer edge of the oil baffle (610), and the thickness of the fixing part (620) is the same as the thickness of the oil baffle (610).

5. The rotary drive device according to claim 1, characterized in that The plurality of fixing parts (620) are evenly distributed circumferentially.

6. The rotary drive device according to any one of claims 1 to 5, characterized in that, The motor assembly (200) includes the rotor shaft (210), a magnetic element (220), a stator core (230), and a plurality of stator windings (240). The magnetic element (220) is sleeved on the rotor shaft (210) and has a plurality of magnetic poles distributed circumferentially. The stator core (230) surrounds the magnetic element (220) and is fixedly disposed in the housing (100). The plurality of stator windings (240) are distributed circumferentially and are all wound on the stator core (230). The stator windings (240) can generate a magnetic field when energized to drive the magnetic element (220) to drive the rotor shaft (210) to rotate.

7. The rotary drive device according to claim 6, characterized in that The motor assembly (200) also includes a stator end cover (260), which is disposed on the side of the stator core (230) facing the reducer (300). The stator end cover (260) is fixedly connected to the housing (100), and the edge of the stator end cover (260) contacts the inner wall of the housing (100). The oil baffle (610) is disposed between the gear ring (330) and the stator end cover (260). One end of the rotor shaft (210) passes through the stator end cover (260) and the oil baffle (610) in sequence and is connected to the reducer (300).

8. The rotary drive device according to any one of claims 1 to 5, characterized in that The motor assembly (200) includes the rotor shaft (210), magnetic coil (280), magnetic coil frame (290), stator core (230), and multiple stator windings (240). The stator core (230) is arranged around the rotor shaft (210). The multiple stator windings (240) are distributed circumferentially and are all wound around the stator core (230). The magnetic coil (280) is arranged around the outside of the stator core (230) and has multiple magnetic poles distributed circumferentially. The magnetic coil frame (290) is connected between the magnetic coil (280) and the rotor shaft (210). The stator windings (240) can generate a magnetic field when energized to drive the magnetic coil (280) to drive the magnetic coil frame (290) and the rotor shaft (210) to rotate.

9. A side door drive assembly, characterized in that, The device includes an actuator and a rotary drive device as described in any one of claims 1 to 8, the rotary drive device being fixedly connected to one of a side door and a passenger compartment of an automobile, the actuator being connected to the other of the side door and the passenger compartment, the actuator being connected to the output shaft of a reducer (300) in the rotary drive device, and being capable of converting the rotational motion of the output shaft of the reducer (300) into a sliding motion of the side door relative to the passenger compartment.

10. A motor vehicle body comprising a vehicle cabin and at least one side door, the side door being provided on a side of the vehicle cabin and being movably connected to the vehicle cabin, characterized in that The vehicle body also includes the side door drive assembly as described in claim 9, the side door drive assembly being connected between the side door and the passenger compartment.

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