Push-pull motor, side door driving assembly and automobile body

Abstract

The utility model provides a push-and-pull motor, side door drive assembly and car body, push-and-pull motor includes shell and drive structure, drive structure is provided in the shell, and drive structure's output shaft passes through the shell outside along preset axis direction, the outer surface of shell is equipped with a plurality of fixed ear, fixed ear is used for the assembly connection with side door or carriage, and the fixed ear is equipped with the drive structure. The multiple fixing lugs are arranged on the periphery of an output shaft of the driving structure in a surrounding mode and symmetrically distributed on the two sides of the preset axis. The push-and-pull motor provided by the utility model is provided with the symmetrically distributed fixing lug shafts, the fixing lugs at different parts can be respectively used for being connected with side doors at different sides or mirror image fixing structures on a carriage, the push-and-pull motor is compatible with mounting point positions of vehicle doors at the left side and the right side, and the manufacturing cost of the push-and-pull motor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive equipment, specifically to a push-pull motor, 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 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 pulley mechanism) to move the side door linearly. However, in order to achieve a compact design for the vehicle's side door and increase the interior space, the side door motor needs to be minimized in size while meeting power requirements, resulting in excessively high overall manufacturing costs for the vehicle's side door drive structure.

[0004] Therefore, how to reduce the manufacturing cost of vehicle side door motors 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 push-pull motor, a side door drive assembly, and a car body. The push-pull motor has symmetrically distributed fixed trunnions, which can be used to connect to fixed structures on side doors or car bodies on different sides, compatible with the installation points of left and right side doors, and reducing the manufacturing cost of the push-pull motor.

[0006] To achieve the above objectives, as one aspect of this utility model, a push-pull motor is provided for driving the opening and closing of a vehicle's side door. The push-pull motor includes a housing and a drive structure. The drive structure is disposed in the housing, and the output shaft of the drive structure extends out of the housing along a preset axis. The outer surface of the housing has multiple pairs of fixing ears for assembly and connection with the side door or the vehicle body. The multiple fixing ears are arranged around the output shaft of the drive structure, and the multiple pairs of fixing ears are symmetrically distributed on both sides of the preset axis.

[0007] Optionally, the plurality of fixed ears includes a first fixed ear, a second fixed ear, a third fixed ear, and a fourth fixed ear, wherein the distance between the first fixed ear and the second fixed ear is greater than the distance between the third fixed ear and the fourth fixed ear, and the positions of the first fixed ear and the third fixed ear are symmetrically distributed about the preset axis with respect to the positions of the second fixed ear and the fourth fixed ear.

[0008] Optionally, a mounting hole is formed in the fixing ear, and the mounting hole extends along the preset axis direction.

[0009] Optionally, the housing includes a housing base and a top cover, the drive structure is 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, and the output shaft of the drive structure passes through the output through hole to the outside of the housing along a preset axial direction;

[0010] The fixing lug includes a first fixing protrusion formed on the outer wall of the housing and a second fixing protrusion formed on the periphery of the top cover. The first fixing protrusion has a first through hole extending along a preset axis, and the second fixing protrusion has a second through hole extending along a preset axis. The first through hole and the second through hole communicate to form the assembly hole.

[0011] Optionally, the housing further includes a plurality of housing fasteners, which pass through a plurality of first through holes and enter a plurality of second through holes in a one-to-one correspondence, so as to fix the top cover to the housing base.

[0012] Optionally, the housing fastener is a screw, and the second through hole is a threaded hole.

[0013] Optionally, the top surface height of the first fixing protrusion is lower than the top end surface height of the housing, and the second fixing protrusion contacts the first fixing protrusion.

[0014] Optionally, the drive structure includes a motor assembly and a reducer, wherein the reducer is a planetary gear reducer, the rotor shaft of the motor assembly is fixedly connected to the sun gear of the reducer, and the output shaft of the reducer is formed as the output shaft of the drive structure.

[0015] Optionally, the motor assembly further includes 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.

[0016] 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.

[0017] 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.

[0018] 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. One end of the rotor shaft passes through the stator end cover and is connected to the reducer.

[0019] 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.

[0020] Optionally, the top bearing is a deep groove ball bearing.

[0021] Optionally, the stator end cover is fixedly connected to the bottom wall of the housing by mounting fasteners.

[0022] 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.

[0023] 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.

[0024] Optionally, the bottom bearing is a deep groove ball bearing.

[0025] 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.

[0026] Optionally, the motor assembly further includes 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.

[0027] 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.

[0028] Optionally, the rotor bearing is a deep groove ball bearing.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Optionally, the bottom wall of the housing also has an assembly through hole, which connects the mounting cylinder to the outside of the housing.

[0035] As a second aspect of this utility model, a side door drive assembly is provided, including an actuator and the aforementioned push-pull motor. The push-pull motor 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 drive structure in the push-pull motor and is capable of converting the rotational motion of the output shaft of the drive structure into a sliding motion of the side door relative to the passenger compartment.

[0036] As a third aspect of this utility model, a car body is provided, including a passenger compartment and a plurality of side doors. The side doors are disposed on the left and right sides of the passenger compartment relative to the direction of travel and are movably connected to the passenger compartment. The car body also includes a plurality of the aforementioned side door drive assemblies. The plurality of side door drive assemblies are respectively connected between the passenger compartment and the plurality of side doors. The push-pull motors in the plurality of side door drive assemblies are all fixedly connected to the side doors through partial fixing ears, or are all fixedly connected to the passenger compartment through partial fixing ears. The positions of the fixing ears used by the push-pull motors on the left and right sides are symmetrical to each other.

[0037] Optionally, the multiple pairs of fixing ears of the push-pull motor include a first fixing ear, a second fixing ear, a third fixing ear, and a fourth fixing ear. The push-pull motors located on the left and right sides are respectively fixedly connected to the side door or the multiple fixing structures on the corresponding side of the carriage through the first fixing ear, the second fixing ear, the third fixing ear, and the first fixing ear, the second fixing ear, and the fourth fixing ear.

[0038] In the push-pull motor provided by this utility model, the outer surface of the housing has multiple fixing ears for assembly and connection with the side door or the vehicle compartment, and the multiple fixing ear shafts are symmetrically distributed on both sides of the preset axis (i.e. the axis of the output shaft). Thus, when the housing is connected to the side door or the vehicle compartment on the left and right sides, some fixing ears can be symmetrically activated, and different fixing ears in the same pair can be used to connect to the fixing structures of the mirror points on the side door or the vehicle compartment on the left and right sides respectively. The push-pull motor provided by this utility model can be compatible with the installation points of the left and right doors through the same housing structure, which reduces the manufacturing cost of the push-pull motor and thus reduces the cost of automobile production line. Attached Figure Description

[0039] The present invention will be further described below with reference to the accompanying drawings:

[0040] Figure 1 This is a schematic diagram of the external structure of the push-pull motor provided in this embodiment of the utility model;

[0041] Figure 2 This is a schematic diagram of the disassembly structure of the push-pull motor provided in this embodiment of the utility model;

[0042] Figure 3 This is a schematic diagram showing the distribution of the fixing lugs of the push-pull motor provided in this embodiment of the utility model;

[0043] Figure 4 This is a schematic diagram of the structure of the top cover in the push-pull motor provided in this embodiment of the utility model;

[0044] Figure 5 This is a schematic diagram of the internal structure of a push-pull motor provided in one embodiment of the present invention;

[0045] Figure 6 yes Figure 5 A cross-sectional structural diagram of the push-pull motor;

[0046] Figure 7 This is a schematic diagram of the internal structure of a push-pull motor provided in another embodiment of the present invention;

[0047] Figure 8 yes Figure 7 A cross-sectional structural diagram of the push-pull motor;

[0048] Figure 9 This utility model provides a schematic diagram of the connection relationship between the push-pull motor and the two side doors in the automobile body.

[0049] Figure 10 This is a partial structural diagram of a car body provided in one embodiment of the present invention;

[0050] Figure 11This is a partial structural diagram of a car body provided in another embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] Housing 100; Fixing lug 101; First fixing lug 101a; Second fixing lug 101b; Third fixing lug 101c; Fourth fixing lug 101d; Assembly hole 102; Housing base 110; Positioning groove 111; Mounting cylinder 112; First fixing protrusion 113; First through hole 113a; Top cover 120; Annular positioning boss 121; Second fixing protrusion 122; Second through hole 122a; Housing fastener 130; Flat washer 131; Spring washer 132; Motor assembly 200; Rotor shaft 210; Magnetic component 220; Stator core 230; Winding assembly Assembly part 231; stator winding 240; top stator support 251; bottom stator support 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; circuit board 201; reducer 300; central shaft 310; planetary carrier 320; gear ring 330; planetary gear 340; gear shaft 350; output bearing 410; first limiting ball 510; symmetry axis α. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] In existing vehicle side door fixing schemes, the motor is fixedly connected to the fixing structure (such as fixing holes) on the side door or carriage through the fixing lugs around the housing. In order to avoid other components such as reducers, clutches and linear transmission structures, the fixing lugs of the motor usually need to be spaced at a large angle in a certain direction to allow enough space. This makes it difficult to achieve a symmetrical design such as an equilateral triangle or square around the motor.

[0056] Because the output shafts of the motors face opposite directions when applied to the left and right sides, and the fixed structures and other components on the left and right side doors or carriages need to be mirrored, the motors on the left and right sides need to have housings with different fixed lug distribution patterns, which increases the manufacturing cost of the side door motor device.

[0057] To address the aforementioned technical problems, as one aspect of this utility model, a push-pull motor is provided for driving the opening and closing of a vehicle's side door, such as... Figures 1 to 4 As shown, the push-pull motor includes a housing 100 and a drive structure. The drive structure is disposed within the housing 100, and its output shaft extends outward from the housing 100 along a predetermined axis. The outer surface of the housing 100 has multiple pairs of fixing ears 101 for assembly and connection with a side door or carriage. These fixing ears 101 are arranged around the output shaft of the drive structure, and the multiple pairs of fixing ears 101 are symmetrically distributed on both sides of the predetermined axis (e.g., as shown in the diagram). Figure 3 As shown, the distribution is symmetrical about the axis of symmetry α.

[0058] In the push-pull motor provided by this utility model, the drive structure in the housing 100 may include a motor, a reducer, and other structures. The output shaft of the drive structure is used to connect with the actuator of the car side door, and drives the side door to open and close by rotating the actuator. The outer surface of the housing 100 has multiple fixing ears 101 for assembly and connection with the side door or the car body. The multiple fixing ears 101 are symmetrically distributed on both sides of a preset axis (i.e., the axis of the output shaft). Thus, when the housing 100 is connected to the side doors or the car body on the left and right sides of the vehicle, some fixing ears 101 can be symmetrically used. Different fixing ears 101 in the same pair are used to connect with the fixing structures at mirrored points on the left and right side doors or the car body. The push-pull motor provided by this utility model can be compatible with the installation points of the left and right car doors through the same housing 100 structure, which eliminates the need to customize different housings 100 for the two side doors or the car body, reducing the manufacturing cost of the push-pull motor and thus reducing the cost of the automobile production line.

[0059] As an optional embodiment of this utility model, such as Figure 4 As shown, the multiple pairs of fixing ears 101 include a first fixing ear 101a, a second fixing ear 101b, a third fixing ear 101c, and a fourth fixing ear 101d. The distance between the first fixing ear 101a and the second fixing ear 101b is greater than the distance between the third fixing ear 101c and the fourth fixing ear 101d. The positions of the first fixing ear 101a and the third fixing ear 101c are symmetrically distributed with respect to the positions of the second fixing ear 101b and the fourth fixing ear 101d about a preset axis. That is, the first fixing ear 101a and the second fixing ear 101b are a pair of fixing ears 101, and the third fixing ear 101c and the fourth fixing ear 101d are a pair of fixing ears 101.

[0060] In this embodiment of the utility model, the housing 100 has four fixing ears 101 around its perimeter: a first fixing ear 101a, a second fixing ear 101b, a third fixing ear 101c, and a fourth fixing ear 101d. The distance between one pair is greater than the distance between the other pair. Thus, when connected to a vehicle side door or carriage, the third fixing ear 101c and the fourth fixing ear 101d, which have a smaller spacing, can be selectively connected to the side door or carriage.

[0061] For example, such as Figure 9 As shown, when the push-pull motor is connected to the right side door of the vehicle, the first fixing ear 101a, the second fixing ear 101b, and the third fixing ear 101c can be fixedly connected to the three fixing structures A, B, and C on the left side door, respectively. When the push-pull motor is connected to the left side door of the vehicle, the first fixing ear 101a, the second fixing ear 101b, and the fourth fixing ear 101d can be fixedly connected to the three fixing structures A, B, and C on the right side door, respectively. That is, when applied to different side doors, the third fixing ear 101c and the fourth fixing ear 101d can form a stable three-point fixation with the first fixing ear 101a and the second fixing ear 101b, which have a larger spacing, thereby adapting to the mirrored fixing structure of different side doors.

[0062] As an optional embodiment of this utility model, such as Figures 1 to 4 As shown, a mounting hole 102 is formed in the fixing ear 101, and the mounting hole 102 extends along a predetermined axis. Correspondingly, the fixing structure on the door or carriage is a fixing hole. When fixing the push-pull motor to the door or carriage, the housing 100 can be fixedly connected to the fixing hole on the door or carriage by fasteners passing through the mounting hole 102.

[0063] In other embodiments of this utility model, the fixing ear 101 may also adopt other forms of assembly structure such as snap fasteners, studs, and irregular grooves.

[0064] As an optional embodiment of this utility model, such as Figure 2 As shown, the housing 100 includes a housing base 110 and a top cover 120. The drive structure is disposed in the housing base 110. The top of the housing base 110 (in this utility model, the top and bottom refer to the upper and lower positions shown in the figure) has a top opening. The top cover 120 is fixedly connected to the housing base 110 and closes the top opening. An output through hole is formed on the top cover 120. The output shaft of the drive structure passes through the output through hole along the preset axis direction to the outside of the housing 100.

[0065] The fixing lug 101 includes a first fixing protrusion 113 formed on the outer wall of the housing 110 and a second fixing protrusion 122 formed on the periphery of the top cover 120. The first fixing protrusion 113 has a first through hole 113a extending along a predetermined axis, and the second fixing protrusion 122 has a second through hole 122a extending along a predetermined axis. The first through hole 113a and the second through hole 122a communicate to form an assembly hole 102.

[0066] In some embodiments of this utility model, the housing 110 and the top cover 120 can be fixed together by means of snap-fit ​​connection, assembly connection, adhesive connection, etc., and together they are fixedly connected to the carriage or side door by fasteners passing through the first through hole 113a and the second through hole 122a.

[0067] Alternatively, to simplify the overall structure of the push-pull motor, preferably, the housing 110 and the top cover 120 can also be assembled and connected via the first fixing protrusion 113 and the second fixing protrusion 122, specifically, as shown below. Figure 2 As shown, the housing 100 also includes a plurality of housing fasteners 130, which pass through a plurality of first through holes 113a and enter a plurality of second through holes 122a in a corresponding manner to fix the top cover 120 to the housing base 110.

[0068] Optionally, such as Figure 2 As shown, the outer casing fastener 130 is a screw, and the second through hole 122a is a threaded hole.

[0069] To ensure the stability of the connection between the housing 110 and the top cover 120, preferably, as follows: Figure 2 As shown, the housing 100 also includes a plurality of flat washers 131 and a plurality of spring washers 132. The flat washers 131 are placed between the nail head of the housing fastener 130 and the second fixing protrusion 122, and the spring washers 132 are placed between the nail head of the housing fastener 130 and the spring washers 132.

[0070] To ensure the coaxiality between the top cover 120 and the housing 110, preferably, as follows: Figures 1 to 4 As shown, the top surface height of the first fixing protrusion 113 is lower than the top end surface height of the housing 110, and the second fixing protrusion 122 is in contact with the first fixing protrusion 113.

[0071] In this embodiment of the present invention, the position of the first fixing protrusion 113 is set to be lower than the height of the top end face of the housing 110, and the second fixing protrusion 122 extends downward to contact the first fixing protrusion 113, so that the second fixing protrusion 122 can be locked around the housing 110 to achieve precise positioning with the outer wall of the housing 110, thereby ensuring the coaxiality between the top cover 120 and the housing 110.

[0072] To further ensure the coaxiality between the top cover 120 and the housing 110, preferably, as follows: Figure 4 As shown, the bottom of the top cover 120 has an annular positioning boss 121, which extends around the output through hole and contacts the inner wall of the housing 110.

[0073] To further improve the compactness of the vehicle side doors, preferably, such as Figures 5 to 8 As shown, the drive structure includes a motor assembly 200 and a reducer 300. The reducer 300 is a planetary gear reducer. The rotor shaft 210 of the motor assembly 200 is fixedly connected to the sun gear of the reducer 300. The output shaft (i.e., the outermost central shaft) of the reducer 300 forms the output shaft of the drive structure.

[0074] In this embodiment of the invention, the reducer 300 is a planetary gear reducer. The rotor shaft 210 of the motor assembly 200 is inserted into the reducer 300 and fixedly connected to the sun gear of the reducer 300. As the rotor shaft 210 and the sun gear 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 push-pull motor, thereby saving wiring space in the vehicle side door transmission area.

[0075] To ensure the transmission efficiency and internal structural stability of the push-pull motor, preferably, as follows: Figure 5 , Figure 7 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

[0076] A second limiting groove is formed on the surface of the reducer 300 facing the rotor shaft 210, and the first limiting ball 510 is partially accommodated in the second limiting groove.

[0077] 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 reducer 300, and at least one of the rotor shaft 210 and 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. Thus, the first limiting ball 510 can be used to maintain the gap between the rotor shaft 210 and the reducer 300, reduce the friction between the rotor shaft 210 and the reducer 300, and thus ensure the transmission efficiency of the push-pull motor and the internal structural stability of the push-pull motor.

[0078] Optionally, such as Figures 5 to 8 As shown, an output through hole is formed on the top cover 120, and the output shaft of the reducer 300 passes through the output through hole to the outside of the housing 100 and forms the output shaft of the drive structure.

[0079] Optionally, such as Figures 5 to 8 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 push-pull motor 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.

[0080] Optionally, the output bearing 410 is a deep groove ball bearing.

[0081] Optionally, such as Figures 5 to 8 As shown, the reducer 300 includes at least one planetary assembly. The planetary assembly includes a central shaft 310, a planet carrier 320, a ring gear 330, a sun gear, and a plurality of 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 plurality of planetary gears 340 are movably disposed on the planet carrier 320 and distributed around the axis of the central shaft 310. The sun gear meshes with the plurality of planetary gears 340. The ring gear 330 is sleeved on the outside of the plurality of planetary gears 340 and meshes with the plurality of planetary gears 340. The ring gear 330 is fixedly disposed in the housing 100.

[0082] As an optional embodiment of this utility model, such as Figures 5 to 8 As shown, the sun gear 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.

[0083] It is understood that when the reducer 300 includes multiple planetary assemblies (i.e., the reducer 300 is a two-stage, three-stage or more planetary gear reducer), the central shaft 310 of the outermost planetary assembly extends to the outside of the housing 100 and forms the output shaft of the drive mechanism. 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.

[0084] To further improve the overall axial (in this invention, axial refers to the length direction of the rotor shaft and output shaft (central shaft) of the push-pull motor) structural compactness, preferably, as follows: Figures 5 to 8As shown, the planetary assembly also includes multiple gear shafts 350. Each gear shaft 350 includes an assembly section, a mating section, and a limiting section that are connected sequentially along its length and whose diameters increase sequentially. The planet carrier 320 has multiple gear mounting holes, and the planetary gear 340 has gear limiting holes and gear mating holes that are connected sequentially along its axial direction. The gear shafts 350 pass through the gear limiting holes and gear mating holes sequentially and are fixed in the gear mounting holes. The assembly section is accommodated in the gear mating hole, and the limiting section is accommodated in the gear limiting hole.

[0085] In this embodiment of the utility model, the shaft hole of the planetary gear 340 adopts a countersunk design, and the assembly section and the limiting section 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 push-pull motor.

[0086] Preferably, the central shaft 310 and the planetary carrier 320 are integrally formed by powder metallurgy.

[0087] In this embodiment of the utility model, the central shaft 310 and the planetary carrier 320 are integrally formed by powder metallurgy. Compared with the existing scheme of assembling or welding the central shaft 310 and the planetary carrier 320 in the reducer 300, 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 push-pull motor operation.

[0088] To further improve the compactness of the vehicle side door structure, as a preferred embodiment of this utility model, such as Figures 5 to 8 As shown, motor assembly 200 is a brushless motor.

[0089] 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.

[0090] 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 push-pull motor 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.

[0091] 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 5 to 6As shown, the motor assembly 200 also includes 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.

[0092] 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.

[0093] Optionally, such as Figures 5 to 6 As 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.

[0094] Optionally, such as Figures 5 to 6 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. One end of the rotor shaft 210 passes through the stator end cover 260 and is connected to the reducer 300.

[0095] Optionally, such as Figures 5 to 6 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.

[0096] Optionally, the top bearing 271 is a deep groove ball bearing.

[0097] Optionally, such as Figures 5 to 6 As shown, the stator end cover 260 is fixedly connected to the bottom wall of the housing 100 by mounting fasteners.

[0098] Optionally, such as Figures 5 to 6As 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.

[0099] Optionally, such as Figures 5 to 6 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.

[0100] Optionally, the bottom bearing 272 is a deep groove ball bearing.

[0101] Optionally, such as Figures 5 to 6 As 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.

[0102] 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 7 to 8 As shown, the motor assembly 200 also includes 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.

[0103] Optionally, such as Figures 7 to 8 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.

[0104] Optionally, rotor bearing 273 is a deep groove ball bearing.

[0105] Optionally, such as Figures 7 to 8 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.

[0106] Optionally, such as Figures 7 to 8 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.

[0107] Optionally, such as Figures 7 to 8 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.

[0108] Optionally, such as Figures 7 to 8 As 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.

[0109] Optionally, such as Figures 7 to 8 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.

[0110] Optionally, such as Figures 7 to 8 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.

[0111] Optionally, such as Figures 7 to 8 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.

[0112] As a second aspect of this utility model, a side door drive assembly is provided, including an actuator and a push-pull motor provided in the embodiments of this utility model. The push-pull motor is used to be fixedly connected to one of the side door and the passenger compartment of a car, and the actuator is used to be connected to the other of the side door and the passenger compartment. The actuator is connected to the output shaft of the drive structure in the push-pull motor and can convert the rotational movement of the output shaft of the drive structure into the sliding movement of the side door relative to the passenger compartment.

[0113] 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 pull wire, and a second pull wire. The wire pull is connected to the output shaft of the reducer 300. The push-pull motor is installed on one of the side door and the carriage. The first end of the first pull wire and the first end of the second pull wire are both wound on the wire pull, and the winding directions of the first pull wire and the second pull wire on the wire pull are opposite. The second end of the first pull wire and the second end of the second pull wire are both fixedly installed on the other of the side door and the carriage, and the second end of the first pull wire and the second end of the second pull wire are respectively located on both sides of the wire pull.

[0114] Taking a push-pull motor installed on the carriage, with the second end of the first pull cable and the second end of the second pull cable connected to the side door as an example, when it is necessary to control the door to move to one side, the push-pull motor can be controlled to drive the pulley to rotate in a certain direction, so that the pulley tightens the first pull cable and releases the second pull cable, and the second end of the first pull cable pulls the door to that side; when it is necessary to control the door to move to the other side, the push-pull motor can be controlled to drive the pulley to rotate in the other direction, so that the pulley tightens the second pull cable and releases the first pull cable, and the second end of the second pull cable pulls the door to the other side in the opposite direction.

[0115] 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 push-pull motor 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 push-pull motor 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.

[0116] Alternatively, the flexible tension belt can be a belt, wire harness, or chain.

[0117] Optionally, the actuator can also be a gear and rack transmission pair, specifically including a lead screw, a lead screw seat, a coupling, and a mating nut. The lead screw is movably disposed in the lead screw seat and can rotate around its own axis. The mating nut is sleeved on the lead screw and meshes with the lead screw. The lead screw is connected to the output shaft of the drive structure through the coupling. The mating nut is used to connect to one of the side door and the carriage, and the lead screw seat and push-pull motor are used to connect to the other of the side door and the carriage.

[0118] Optionally, the actuator includes a lead screw, a lead screw seat, a mating nut, and a gear transmission mechanism. The lead screw is movably disposed in the lead screw seat and can rotate around its own axis. The mating nut is sleeved on the lead screw and meshes with the lead screw. The gear transmission mechanism is connected between the output shaft of the drive structure and the mating nut and can drive the mating nut to rotate when the output shaft of the drive structure rotates. The push-pull motor is used to connect to one of the side door and the carriage, and the lead screw seat is used to connect to the other of the side door and the carriage.

[0119] Optionally, the actuator includes a guide rack and a mating gear, the mating gear meshing with the guide rack and connected to the output shaft of the drive structure, the guide rack being used to connect to one of the side door and the carriage, and the push-pull motor being used to connect to the other of the side door and the carriage.

[0120] As a third aspect of this utility model, a car body is provided, such as... Figure 10 , Figure 11 As shown, the vehicle body includes a passenger compartment 10 and multiple side doors 20. The side doors 20 are located on the left and right sides of the passenger compartment 10 relative to the direction of travel and are movably connected to the passenger compartment 10. The vehicle body also includes multiple side door drive assemblies 30 provided in this utility model embodiment. The multiple side door drive assemblies 30 are respectively connected between the passenger compartment 10 and the multiple side doors 20. The push-pull motors in the multiple side door drive assemblies 30 are all fixedly connected to multiple fixed structures on the side doors 20 through partial fixing ears 101, or are all fixedly connected to multiple fixed structures on the passenger compartment 10 through partial fixing ears 101. The positions of the side doors 20 or the fixed structures on the passenger compartment 10 located on the left and right sides are symmetrical to each other, and the push-pull motors located on the left and right sides are fixedly connected to the fixed structures through different fixing ears 101 in at least one pair of fixing ears 101.

[0121] Optionally, such as Figure 10 , Figure 11 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.

[0122] As an optional embodiment of this utility model, such as Figure 10 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.

[0123] As another optional embodiment of this utility model, such as Figure 11As 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.

[0124] Optionally, such as Figure 9 As shown, the push-pull motor has multiple pairs of fixing ears 101, including a first fixing ear 101a, a second fixing ear 101b, a third fixing ear 101c, and a fourth fixing ear 101d. The push-pull motors located on the left and right sides are respectively fixedly connected to the side door 20 or multiple fixing structures (fixing structure A, fixing structure B, and fixing structure C) on the corresponding side through the first fixing ear 101a, the second fixing ear 101b, the third fixing ear 101c, the first fixing ear 101a, the second fixing ear 101b, and the fourth fixing ear 101d.

[0125] 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 push-pull motor for driving the opening and closing of a vehicle side door, the push-pull motor comprising a housing (100) and a drive structure, the drive structure being disposed within the housing (100), and the output shaft of the drive structure extending outward from the housing (100) along a predetermined axial direction, characterized in that, The housing (100) has multiple pairs of fixing ears (101) for assembly and connection with the side door or carriage. Multiple fixing ears (101) are arranged around the output shaft of the drive structure, and multiple pairs of fixing ears (101) are symmetrically distributed on both sides of the preset axis.

2. The push-pull motor according to claim 1, characterized in that, The plurality of fixed ears (101) include a first fixed ear (101a), a second fixed ear (101b), a third fixed ear (101c), and a fourth fixed ear (101d), wherein the distance between the first fixed ear (101a) and the second fixed ear (101b) is greater than the distance between the third fixed ear (101c) and the fourth fixed ear (101d), and the positions of the first fixed ear (101a) and the third fixed ear (101c) are axially symmetrical about the preset axis with respect to the positions of the second fixed ear (101b) and the fourth fixed ear (101d).

3. The push-pull motor according to claim 1, characterized in that, An assembly hole (102) is formed in the fixing ear (101), and the assembly hole (102) extends along the preset axis direction.

4. The push-pull motor according to claim 3, characterized in that, The housing (100) includes a housing base (110) and a top cover (120). The drive structure is disposed in the housing base (110). The top of the housing base (110) has a top opening. The top cover (120) is fixedly connected to the housing base (110) and closes the top opening. An output through hole is formed on the top cover (120). The output shaft of the drive structure passes through the output through hole along a preset axial direction to the outside of the housing (100). The fixing lug (101) includes a first fixing protrusion (113) formed on the outer wall of the housing (110) and a second fixing protrusion (122) formed on the periphery of the top cover (120). The first fixing protrusion (113) has a first through hole (113a) extending along a preset axis, and the second fixing protrusion (122) has a second through hole (122a) extending along a preset axis. The first through hole (113a) and the second through hole (122a) communicate to form the assembly hole (102).

5. The push-pull motor according to claim 4, characterized in that, The housing (100) also includes a plurality of housing fasteners (130), which pass through a plurality of first through holes (113a) and enter a plurality of second through holes (122a) to fix the top cover (120) to the housing base (110).

6. The push-pull motor according to claim 4, characterized in that, The top surface height of the first fixing protrusion (113) is lower than the top end surface height of the housing (110), and the second fixing protrusion (122) is in contact with the first fixing protrusion (113).

7. The push-pull motor according to any one of claims 1 to 6, characterized in that, The drive structure includes a motor assembly (200) and a reducer (300). The reducer (300) is a planetary gear reducer. The rotor shaft (210) of the motor assembly (200) is fixedly connected to the sun gear of the reducer (300). The output shaft of the reducer (300) is formed as the output shaft of the drive structure.

8. A side door drive assembly, characterized in that, The device includes an actuator and a push-pull motor as described in any one of claims 1 to 7, the push-pull motor being fixedly connected to one of the side door and the passenger compartment of the vehicle, the actuator being connected to the other of the side door and the passenger compartment, the actuator being connected to the output shaft of the drive structure in the push-pull motor, and being capable of converting the rotational motion of the output shaft of the drive structure into a sliding motion of the side door relative to the passenger compartment.

9. A vehicle body, comprising a passenger compartment (10) and a plurality of side doors (20), said side doors (20) being disposed on the left and right sides of the passenger compartment (10) relative to the direction of travel and being movably connected to the passenger compartment (10), characterized in that, The vehicle body also includes a plurality of side door drive assemblies (30) as described in claim 8. The plurality of side door drive assemblies (30) are respectively connected between the passenger compartment (10) and the plurality of side doors (20). The push-pull motors in the plurality of side door drive assemblies (30) are all fixedly connected to the plurality of fixed structures on the side door (20) through a portion of the fixed ears (101), or are all fixedly connected to the plurality of fixed structures on the passenger compartment (10) through a portion of the fixed ears (101). The fixed structures on the side doors (20) or the passenger compartment (10) located on the left and right sides are symmetrical to each other. The push-pull motors located on the left and right sides are fixedly connected to the fixed structures through different fixed ears (101) in at least one pair of fixed ears (101).

10. The automobile body according to claim 9, characterized in that, The multiple pairs of fixing ears (101) of the push-pull motor include a first fixing ear (101a), a second fixing ear (101b), a third fixing ear (101c), and a fourth fixing ear (101d). The push-pull motors located on the left and right sides are respectively fixedly connected to the side door (20) or the carriage (10) on the corresponding side through the first fixing ear (101a), the second fixing ear (101b), the third fixing ear (101c), the first fixing ear (101a), the second fixing ear (101b), and the fourth fixing ear (101d).

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