Vehicle hub motor and carrying tool

Abstract

The utility model discloses a vehicle wheel hub motor and a carrying tool, and the motor comprises a motor housing which comprises a cover plate, a front end cover, a supporting plate, and a rear end cover. The front end cover comprises a concave part, a front end part and a circumferential part; the recessed part is recessed towards the rear end cover in the axial direction and comprises the circumference of the recessed part and the end face of the recessed part. When the supporting plate and the cover plate are fixedly connected into a whole, the rear end cover, the circumference part, the front end part, the circumference of the concave part and the cover plate form a motor cavity; the cover plate, the circumference of the concave part and the end face of the concave part form a speed reducer cavity; when the supporting plate and the end face of the concave part are fixedly connected into a whole, the rear end cover, the circumferential part, the front end part, the circumference of the concave part and the end face of the concave part form a motor cavity. And the cover plate, the circumference of the concave part and the end face of the concave part form a speed reducer cavity. According to the utility model, the axial size is compact, and the motor cavity and the speed reducer cavity are independent cavities.

Description

Technical Field

[0001] The utility model relates to a vehicle hub motor and a vehicle, belonging to the technical field of motors. Background Art

[0002] The hub motor is installed inside the wheel rim and directly drives the corresponding wheel. It has the advantages of high driving efficiency, large vehicle space, low center of gravity, and easy implementation of advanced vehicle dynamics control. Therefore, as a key component of the distributed drive system, the hub motor is receiving increasing attention.

[0003] The wheel hub motor solution is divided into direct drive wheel hub motor and reduction wheel hub motor with reducer. The reduction wheel hub motor has more advantages in output torque and reliability. However, most of the existing reduction wheel hub motors simply integrate the motor body and the reducer together, resulting in a large size and weight.

[0004] In the prior art, Schaeffler's hub motor is a reduction hub motor. The rotor bracket and the sun gear are an integral structure, and can only be driven by spur gears. The overlap is low, and there is high noise and vibration when running at high speed. The output shaft is arranged in a single cantilever structure with poor rigidity. The planetary carrier output is unsupported and has poor reliability.

[0005] In the prior art, the NTN hub motor is a reduction hub motor, which adopts dual motors and three-stage planetary gear transmission, has a complex structure and low transmission efficiency; the bearings need to be specially designed and calculated before they can be matched and used, have poor versatility, and are difficult to maintain. It adopts a tandem structure with a large axial size, and the reducer part protrudes too much from the hub and is easy to be damaged.

[0006] Existing patent applications CN201710537261.0 provide a hub motor with a column, CN201710537653.7 provide a hub motor for automobiles, and CN201710537095.4 provide a hub motor. The reducer is arranged in the cavity of the drive motor, and the motor cavity and the reducer cavity are not distinguished. This not only makes the motor assembly and maintenance difficult, but also the motor and the reducer interfere with each other. In particular, when using efficient immersion oil cooling, high-speed and low-speed components are in the same cavity, resulting in great oil stirring losses. The rotor assembly (including the rotor, rotor bracket and transmission main shaft) is supported on the inner end cover by bearings on one side and on the planet carrier by bearings on the other side. At this time, the planet carrier not only needs to rotate itself, but also is supported on the inner side of the cylindrical member by bearings. This unstable cascade support method and structure is not sufficient to provide stability and durability for the rotor assembly and the reducer assembly when they rotate at high speed and / or the motor vibrates due to the influence of the wheels. When the reducer assembly or the rotor assembly is vibrated or damaged, the vibration and damage will be transmitted to the other party, causing a chain reaction and poor system reliability. Summary of the invention

[0007] The purpose of the present utility model is to overcome the deficiencies in the prior art and provide a vehicle hub motor and a vehicle carrier, which have a compact axial dimension and the motor cavity and the reducer cavity are independent cavities. To achieve the above purpose, the present utility model is implemented by the following technical solutions:

[0008] In a first aspect, the present utility model provides a vehicle hub motor, including a motor housing, and the motor housing includes a cover plate, a front end cover, a support plate and a rear end cover;

[0009] The front end cover includes a recessed portion, a front end portion and a circumferential portion; the recessed portion is provided in the middle of the front end cover and is recessed axially towards the rear end cover to form a recessed portion; the recessed portion includes the circumference of the recessed portion and the end face of the recessed portion; the front end portion connects the circumference of the recessed portion and the circumferential portion; the circumferential portion connects the front end portion and the rear end cover;

[0010] The support plate is fixedly connected to the cover plate as a whole, or fixedly connected to the end face of the recessed portion as a whole;

[0011] When the support plate is fixedly connected to the cover plate as a whole, the end face of the recessed portion and the front end face of the front end portion are consolidated into a whole; the rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion and the cover plate form a motor cavity; the cover plate, the circumference of the recessed portion and the end face of the recessed portion form a reducer cavity;

[0012] When the support plate is fixedly connected to the end face of the recessed portion as a whole, the cover plate is connected to the front end face of the front end portion; the rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion and the end face of the recessed portion form a motor cavity; the cover plate, the circumference of the recessed portion and the end face of the recessed portion form a reducer cavity;

[0013] Both the motor cavity and the reducer cavity are independent cavities.

[0014] Combined with the first aspect, optionally, there is a lubricating and heat-dissipating medium in the motor housing;

[0015] When the support plate is fixedly connected to the cover plate as a whole and the motor cavity and the reducer cavity adopt the same lubricating and heat-dissipating medium, through holes are provided on the cover plate, and the heat-dissipating medium flows through the motor cavity and the reducer cavity through the through holes;

[0016] When the support plate is fixedly connected to the end face of the recessed portion as a whole and the motor cavity and the reducer cavity adopt the same lubricating and heat-dissipating medium, through holes are provided on the end face of the recessed portion, and the heat-dissipating medium flows through the motor cavity and the reducer cavity through the through holes.

[0017] Combined with the first aspect, optionally, it further includes a rotating shaft and a motor, a reducer and a brake arranged along the axial direction of the rotating shaft;

[0018] The motor includes a stator and a rotor. The stator is fixed inside the circumferential part, and the rotor is connected to the rotating shaft through a rotor bracket.

[0019] The speed reducer includes a sun gear, a ring gear, and planet gears that mesh with the sun gear and the internal gear ring. The sun gear is connected to the rotating shaft, the ring gear is fixedly connected inside the circumference of the recessed part, and the planet gears are supported in the speed reducer cavity through a planet carrier; the end face of the planet carrier is connected to the rim using the in-wheel motor of the vehicle to transmit the output torque of the speed reducer.

[0020] The brake includes a brake caliper and a brake disc; the brake caliper is installed outside the rear end cover and includes brake pads and a caliper body; the brake disc is connected to the rotating shaft; when the caliper body applies pressure to the brake pads, the brake pads contact the brake disc to generate a braking force, and this braking force is transmitted through the speed reducer and then by the planet carrier to brake the output torque of the rim.

[0021] Combined with the first aspect, optionally, a first limiting bearing is provided between the support frame in the middle of the rotor bracket and the rear end cover.

[0022] When the support plate is fixedly connected to the cover plate as a whole, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the cover plate; when the support plate is fixedly connected to the end face of the recessed part as a whole, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the end face of the recessed part.

[0023] The first limiting bearing and the second limiting bearing cooperate to form a paired double-limiting and supporting for the rotor bracket.

[0024] Combined with the first aspect, optionally, a positioning device is provided on the outer ring of the rotor bracket. The positioning device and the outer ring of the rotor bracket cooperate to form a concave mechanism, and the rotor part is nested in the concave structure.

[0025] Combined with the first aspect, optionally, the planet carrier is connected to the speed reducer cavity through bearing pairs arranged on the left and right sides of the ring gear.

[0026] Combined with the first aspect, optionally, the minimum clearance between the brake disc and the brake pads in the non-braking state is greater than 0.1 mm.

[0027] Combined with the first aspect, optionally, it further includes a driver provided inside the rear end cover. The driver is electrically connected to the coil of the stator through a busbar provided at the end of the stator and drives the rotor to rotate under set control.

[0028] In combination with the first aspect, optionally, it further includes a plurality of control arm connection points provided on the outer end surface of the rear end cover, and the control arm connection points are used to install a control arm connected to the vehicle body.

[0029] In a second aspect, the present utility model provides a vehicle carrier, including the vehicle hub motor described in the first aspect.

[0030] Compared with the prior art, the beneficial effects achieved by the vehicle hub motor and the vehicle carrier provided by the embodiments of the present utility model include:

[0031] The motor housing of the present utility model includes a cover plate, a front end cover, a support plate, and a rear end cover; the front end cover includes a recessed portion, a front end portion, and a circumferential portion; the recessed portion is recessed axially towards the rear end cover, including the circumference of the recessed portion and the end face of the recessed portion; when the support plate is fixedly connected to the end face of the recessed portion as a whole in the present utility model, the cover plate is connected to the front end face of the front end portion, and the rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion, and the end face of the recessed portion form a motor cavity; the cover plate, the circumference of the recessed portion, and the end face of the recessed portion form a reducer cavity; the motor cavity and the reducer cavity of the present utility model are independent cavities, and the reducer cavity is nested in the motor cavity, with a compact axial dimension;

[0032] When the support plate is fixedly connected to the cover plate as a whole in the present utility model, the rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion, and the cover plate form a motor cavity; the cover plate, the circumference of the recessed portion, and the end face of the recessed portion form a reducer cavity; the motor cavity and the reducer cavity of the present utility model are independent cavities, and the reducer cavity is nested in the motor cavity, with a compact axial dimension; the end face of the recessed portion of the present utility model is fixedly connected to the front end face of the front end portion as a whole. When assembling the vehicle hub motor assembly, it only needs to be assembled in the same direction, fixing the cover plate and the rear end cover, saving processing costs and improving positioning accuracy;

[0033] A first limiting bearing is provided between the support frame in the middle of the rotor bracket of the present utility model and the rear end cover; when the support plate is fixedly connected to the cover plate as a whole, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the cover plate; when the support plate is fixedly connected to the end face of the recessed portion as a whole, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the end face of the recessed portion; the present utility model provides a paired double limiting and support for the rotor bracket by the cooperation of the first limiting bearing and the second limiting bearing, and the structure is stable during high-speed operation;

[0034] The planet carrier of the present utility model is connected to the reducer cavity through bearing pairs arranged on the left and right sides of the ring gear; the present utility model provides double support for the planet carrier, with a stable structure, high efficiency, and low noise during high-speed operation. Description of the Drawings

[0035] Figure 1Schematic diagram of a vehicle hub motor provided in Embodiment 1 of the present utility model;

[0036] Figure 2 Simplified diagram of a cavity structure of a vehicle hub motor provided in Embodiment 1 of the present utility model;

[0037] Figure 3 Another simplified diagram of a cavity structure of a vehicle hub motor provided in Embodiment 1 of the present utility model;

[0038] Figure 4 Exploded view of a speed reducer of a vehicle hub motor provided in Embodiment 1 of the present utility model;

[0039] Figure 5 Schematic diagram of the rear end cover and brake of a vehicle hub motor provided in Embodiment 1 of the present utility model.

[0040] In the figure:

[0041] 1. Motor housing; 101. Cover plate; 102. Front end cover; 10201. Recessed part, 102011. Circumference of the recessed part, 102012. End face of the recessed part, 10202. Front end part, 10203. Circumferential part; 103. Rear end cover; 10301. Control arm connection point;

[0042] 2. Rotating shaft;

[0043] 301. Stator; 302. Rotor, 30201. Rotor bracket; 303. First limiting bearing; 304. Second limiting bearing;

[0044] 401. Sun gear; 402. Ring gear; 403. Planet gear; 40301. Planet carrier, 40302. Bearing pair;

[0045] 5. Driver; 501. Heat dissipation pad;

[0046] 601. Brake disc; 602. Brake caliper. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0048] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper / lower end", "inside", "outside", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "set / sleeved with", "socket connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] Embodiment 1

[0051] In this embodiment, there is provided a vehicle hub motor as shown in Figure 1 which includes a motor housing 1, a rotating shaft 2, a motor, a reducer, and a brake arranged along the axial direction of the rotating shaft, and also includes a driver 5.

[0052] The motor housing includes a cover plate 101, a front end cover 102, a support plate, and a rear end cover 103. The front end cover includes a recessed portion 10201, a front end portion 10202, and a circumferential portion 10203. The recessed portion is provided in the middle of the front end cover and is recessed axially towards the rear end cover to form the recessed portion. Specifically, the recessed portion includes the circumference 102011 of the recessed portion and the end face 102012 of the recessed portion. The front end portion connects the circumference of the recessed portion and the circumferential portion. The circumferential portion connects the front end portion and the rear end cover.

[0053] As shown in Figure 2 is an implementation manner provided in this embodiment. The support plate is fixedly connected to the end face of the recessed portion integrally, and the cover plate is connected to the front end face of the front end portion. The rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion, and the end face of the recessed portion form a motor cavity, and the cover plate, the circumference of the recessed portion, and the end face of the recessed portion form a reducer cavity.

[0054] Preferably, the support plate is fixedly connected to the end face of the recessed portion integrally by an integral molding process or a processing method such as welding.

[0055] When adopting as shown in Figure 2When assembling the motor using the shown motor housing, first face the motor cavity towards the processing tooling, assemble and process the components in the motor cavity, and after completing the assembly of the motor cavity, connect the rear end cover and the circumferential part; flip the motor housing, face the reducer cavity towards the processing tooling, assemble and process the components in the reducer cavity, and after completing the assembly of the reducer cavity, connect the cover plate and the front face of the front end part. Or, first face the reducer cavity towards the processing tooling, assemble the components in the reducer cavity, and after completing the assembly of the reducer cavity, connect the cover plate and the front face of the front end part; flip the motor housing, face the motor cavity towards the processing tooling, assemble and process the components in the motor cavity, and after completing the assembly of the motor cavity, connect the rear end cover and the circumferential part.

[0056] Preferably, the cover plate and the front face of the front end part are connected by bolts, and the rear end cover and the circumferential part are connected by bolts, or other connection methods can be adopted according to actual requirements.

[0057] As Figure 3 Shown is another implementation provided in this embodiment. When the support plate and the cover plate are fixedly connected as a whole, the end face of the recessed part and the front face of the front end part are consolidated into a whole. The rear end cover, the circumferential part, the front end part, the circumference of the recessed part, and the cover plate form the motor cavity, and the cover plate, the circumference of the recessed part, and the end face of the recessed part form the reducer cavity.

[0058] Preferably, the support plate and the cover plate are fixedly connected as a whole by an integral molding processing method or other processing methods such as welding.

[0059] It should be noted that the end face of the recessed part and the front face of the front end part are fixedly connected into an inseparable whole by an integral molding processing method or other processing methods such as welding, or can also be fixedly connected into a separable whole by connection methods such as bolt connection.

[0060] When using the motor housing as shown in Figure 3 for motor assembly, first place the consolidated end face of the recessed part and the front face of the front end part at the bottom, face the reducer cavity towards the processing tooling, assemble and process the components in the reducer cavity, and after completing the assembly of the reducer cavity, connect the cover plate (formed by fixedly connecting the support plate and the cover plate) and the circumference of the recessed part; assemble and process the components in the motor cavity, and after completing the assembly of the motor cavity, connect the rear end cover and the circumferential part.

[0061] Preferably, the rear end cover and the circumferential part are connected by bolts, or other connection methods can be adopted according to actual requirements.

[0062] In the two implementation manners provided in this embodiment, compared with a hub motor with a column provided in the existing patent application CN201710537261.0, a hub motor for an automobile provided in CN201710537653.7, and a hub motor provided in CN201710537095.4, the motor cavity and the reducer cavity are independent cavities, the motor and the reducer do not interfere with each other, and the assembly and maintenance of the motor are easier. Moreover, the reducer cavity is nested or partially nested in the motor cavity, and the axial dimension is compact.

[0063] When assembling the motor using the motor housing as shown in Figure 3 , after fixing the end face of the recessed part consolidated into a whole and the front end face of the front end part at the machining position, only assembly in the same direction is required, without flipping the motor housing. Only the cover plate and the rear end cover need to be fixed, saving the processing cost and improving the positioning accuracy, which is superior to the embodiment shown in Figure 2 . The embodiment shown in Figure 3 is the optimal choice.

[0064] It should be noted that Figure 2 and Figure 3 are schematic diagrams for cavity illustration, and the holes required for bearing or shaft installation are not drawn.

[0065] There is a lubricating and heat-dissipating medium in the motor housing. When the support plate and the cover plate are fixedly connected into one body and the motor cavity and the reducer cavity adopt the same lubricating and heat-dissipating medium, through holes are provided on the cover plate, and the heat-dissipating medium flows through the motor cavity and the reducer cavity through the through holes. When the support plate and the end face of the recessed part are fixedly connected into one body and the motor cavity and the reducer cavity adopt the same lubricating and heat-dissipating medium, through holes are provided on the end face of the recessed part, and the heat-dissipating medium flows through the motor cavity and the reducer cavity through the through holes.

[0066] This embodiment also provides a situation where different lubricating and heat-dissipating media are used in the motor cavity and the reducer cavity. A set lubricating grease (generally a lubricating grease with a higher viscosity to enhance the lubrication of gears) is provided in the reducer cavity, and a set heat-conducting grease (generally a heat-dissipating grease with a lower viscosity to reduce the oil agitation loss) is provided in the motor cavity. When different lubricating and heat-dissipating media are used in the motor cavity and the reducer cavity, through holes are not provided on the cover plate or the end face of the recessed part.

[0067] In the two implementation manners provided in this embodiment, compared with a hub motor with a column provided in the existing patent application CN201710537261.0, a hub motor for an automobile provided in CN201710537653.7, and a hub motor provided in CN201710537095.4, the motor cavity and the reducer cavity are independent cavities. When an efficient immersion oil cooling method is adopted, the high-speed components and the low-speed components are in different cavities, and the oil stirring loss is small.

[0068] A control arm connection point 10301 for suspension and / or steering is provided on the motor housing. The control arm connection point 10301 is provided on the outer end surface of the rear end cover, as Figure 1 and Figure 5 shown.

[0069] The control arm connection point is also provided on the circumferential part and the outer end surface of the front end part of the front end cover.

[0070] The control arm connection point also includes an example of indirectly connecting the control arm through an adapter.

[0071] The control arm is used to connect the vehicle hub motor to the vehicle body and control the movement of the wheel. Specifically, the control arm includes upper and lower control arms for suspension, a control arm for a steering tie rod, a control arm for a stabilizer bar, etc.

[0072] Furthermore, there are reinforcing ribs on the motor housing to reduce the weight, improve the strength, and enhance the heat dissipation. A socket for the motor power supply and communication is also provided on the motor housing.

[0073] As Figure 1 shown, the motor of this embodiment includes a stator 301 and a rotor 302. The stator is fixed inside the circumferential part, and the rotor is connected to the rotating shaft through a rotor bracket 30201. The rotor rotates relative to the stator, and the rotor is connected to the reducer through the rotating shaft.

[0074] The motor body provided in this embodiment is an inner-rotor radial flux motor, and this embodiment is also applicable to the case where the motor body is an axial flux motor. Case 1: When the motor body adopts an axial flux motor, preferably, the stator 301 is installed in an annular groove formed by the circumferences of the circumferential part, the front end part, and the recessed part. The rotor 302 is axially set between the stator 301 and the rear cover plate. The rotor is directly connected to the rotating shaft or connected to the rotating shaft through a rotor bracket 30201. Case 2: When the motor body adopts an axial flux motor, the rotor 302 is in an annular groove formed by the circumferences of the circumferential part, the front end part, and the recessed part. The rotor is directly connected to the rotating shaft or connected to the rotating shaft through a C-shaped rotor bracket 30201. The stator 301 is axially set between the rotor 302 and the rear cover plate.

[0075] Busbars are provided at the ends of the stator. The busbars include a copper bar in the shape of a circular ring and an insulator that is spaced apart from and wraps around the copper bar. Connection points for connecting to the stator coils and the driver are provided on the copper bar.

[0076] The driver is electrically connected to the coils of the stator through the busbars provided at the ends of the stator, and drives the rotor to rotate under set control. Specifically, a heat dissipation pad 501 is provided between the driver and the inner wall of the rear end cover.

[0077] In this embodiment, an existing stator and busbars in the prior art are adopted.

[0078] The function of the rotor bracket is to reduce the thickness of the rotor ring to reduce the weight, and to support the rotor in the motor cavity to accommodate the reducer cavity. Preferably, reinforcing ribs are also provided on the rotor bracket to reduce the deformation caused by the rotation of the rotor.

[0079] A stationary part of the rotor angle sensor is provided on the rear end cover. Correspondingly, a moving part of the rotor angle sensor is provided on the rotor and / or the rotor bracket. As Figure 1 shown, in this embodiment, the moving part of the rotor angle sensor is provided on the rotor bracket.

[0080] As Figure 1 shown, a first limiting bearing 303 is provided between the support frame in the middle of the rotor bracket and the rear end cover. When the support plate and the cover plate are fixedly connected into one body, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the cover plate. As Figure 1 shown, when the support plate and the end face of the recessed part are fixedly connected into one body, a second limiting bearing 304 is provided between the support frame in the middle of the rotor bracket and the end face of the recessed part.

[0081] The first limiting bearing and the second limiting bearing cooperate to form a pair of double limiting and supporting for the rotor bracket, so as to maintain structural stability during the high-speed operation of the in-wheel motor for vehicles.

[0082] In this embodiment, the second limiting bearing is preferably a double-row deep groove ball bearing.

[0083] As Figure 1 shown, a positioning device is provided on the outer ring of the rotor bracket. The positioning device cooperates with the outer ring of the rotor bracket to form a concave mechanism, and the rotor part is nested in the concave structure.

[0084] The positioning device includes a flanging and a positioning boss. The flanging and the positioning boss respectively form two sides of the concave mechanism. The flanging can enhance the strength of the rotor bracket, reduce the deformation amount, and axially fix the rotor. The positioning boss can enhance the strength of the rotor bracket and facilitate the disassembly and adjustment of the installation position.

[0085] Further, the rotor bracket can adopt a split-type rotor bracket provided in the utility model with the publication number CN201821600527.8.

[0086] As Figure 1 shown, the speed reducer of this embodiment includes a sun gear 401, a ring gear 402, and planet gears 403 meshing with the sun gear and the internal gear ring. The sun gear is connected to the rotating shaft, the ring gear is fixedly connected to the inner side of the circumference of the recessed part, and the planet gears are supported in the speed reducer cavity through a planet carrier 40301.

[0087] The speed reducer adopts a NW or NGW reduction form, the total reduction ratio is not less than 2.3, and at least the ring gear needs to adopt helical teeth to enhance the torque bearing capacity.

[0088] As Figure 1 shown, in this embodiment, the end face of the planet carrier is connected to the rim of the vehicle-mounted hub motor to transmit the output torque of the speed reducer.

[0089] It should be noted that the planet carrier is directly connected to the rim externally, or connected to the rim through an adapter such as a flange.

[0090] As Figure 4 shown, the planet carrier is connected to the speed reducer cavity through bearing pairs 40302 arranged on the left and right sides of the ring gear. The bearing pairs on the left and right sides provide double support for the planet carrier, so as to still maintain structural stability when the vehicle-mounted hub motor runs at high speed. Preferably, the bearings forming the bearing pairs adopt deep groove ball bearings, tapered roller bearings, flat needle or roller bearings.

[0091] As Figure 1 shown, the brake of this embodiment includes a brake caliper 602 and a brake disc 601, and the brake disc is connected to the rotating shaft. The brake caliper is installed on the outside of the rear end cover and includes brake pads and a caliper body. When the caliper body applies pressure to the brake pads, the brake pads contact the brake disc to generate a braking force, and this braking force is transmitted through the speed reducer and then transmitted by the planet carrier to brake the output torque of the rim.

[0092] The brake disc passing through the speed reducer is beneficial to magnify the braking force of the brake disc after deceleration, so as to obtain a larger braking torque, thereby reducing the volume and weight of the brake, and even being able to omit the brake booster device of the whole vehicle. Preferably, the brake can adopt a vacuum booster brake or an electric booster brake.

[0093] The minimum gap between the brake disc and the brake pads in the non-braking state is greater than 0.1 mm. The minimum gap greater than 0.1 mm must be satisfied in actual use, because the brake disc rotates at a higher speed than a conventional brake. If the gap is less than 0.1 mm, the brake disc and the brake pads will generate frictional losses in the non-braking state.

[0094] This embodiment provides the first limiting bearing and the second limiting bearing to cooperate to form paired double limiting and support for the rotor bracket, so that the structure of the rotor assembly (including the rotor, the rotor bracket and the transmission main shaft) is stable during high-speed operation.

[0095] In this embodiment, the planet carrier is connected to the reducer cavity through bearing pairs arranged on the left and right sides of the ring gear, providing double support for the planet carrier, with stable structure, high efficiency and low noise during high-speed operation.

[0096] Embodiment 2

[0097] In this embodiment, a vehicle is provided, including the vehicle hub motor described in Claim Embodiment 1.

[0098] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0099] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0100] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vehicle hub motor, characterized in that, It includes a motor housing, and the motor housing includes a cover plate, a front end cover, a support plate, and a rear end cover; The front end cover includes a recessed portion, a front end portion, and a circumferential portion; the recessed portion is provided in the middle of the front end cover and recesses axially in the direction of the rear end cover to form a recessed portion; the recessed portion includes the circumference of the recessed portion and the end face of the recessed portion; the front end portion connects the circumference of the recessed portion with the circumferential portion; the circumferential portion connects the front end portion with the rear end cover; The support plate is fixedly connected to the cover plate as a whole or fixedly connected to the end face of the recessed portion as a whole; When the support plate is fixedly connected to the cover plate as a whole, the end face of the recessed portion and the front end face of the front end portion are consolidated into a whole; the rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion, and the cover plate form a motor cavity; the cover plate, the circumference of the recessed portion, and the end face of the recessed portion form a reducer cavity; When the support plate is fixedly connected to the end face of the recessed portion as a whole, the cover plate is connected to the front end face of the front end portion; the rear end cover, the circumferential portion, the front end portion, the circumference of the recessed portion, and the end face of the recessed portion form a motor cavity; the cover plate, the circumference of the recessed portion, and the end face of the recessed portion form a reducer cavity; Both the motor cavity and the reducer cavity are independent cavities.

2. The vehicle hub motor according to claim 1, wherein There is a lubricating and heat-dissipating medium in the motor housing; When the support plate is fixedly connected to the cover plate as a whole and the motor cavity and the reducer cavity adopt the same lubricating and heat-dissipating medium, through holes are provided on the cover plate, and the heat-dissipating medium flows through the motor cavity and the reducer cavity through the through holes; When the support plate is fixedly connected to the end face of the recessed portion as a whole and the motor cavity and the reducer cavity adopt the same lubricating and heat-dissipating medium, through holes are provided on the end face of the recessed portion, and the heat-dissipating medium flows through the motor cavity and the reducer cavity through the through holes.

3. The vehicle hub motor according to claim 1, characterized in that, It further includes a rotating shaft and a motor, a reducer, and a brake arranged along the axial direction of the rotating shaft; The motor includes a stator and a rotor, the stator is fixed inside the circumferential portion, and the rotor is connected to the rotating shaft through a rotor bracket; The reducer includes a sun gear, a ring gear, and planet gears meshing with the sun gear and the internal gear ring. The sun gear is connected to the rotating shaft, the ring gear is fixedly connected inside the circumference of the recessed portion, and the planet gears are supported in the reducer cavity through a planet carrier; the end face of the planet carrier is connected to the rim using the vehicle hub motor to transmit the output torque of the reducer; The brake includes a brake caliper and a brake disc; the brake caliper is installed on the outside of the rear end cover and includes brake pads and a caliper body; the brake disc is connected to the rotating shaft; when the caliper body applies pressure to the brake pads, the brake pads contact the brake disc to generate a braking force, and this braking force is transmitted through the reducer and then by the planet carrier to brake the output torque of the rim.

4. The vehicle hub motor according to claim 3, wherein A first limiting bearing is provided between the support frame in the middle of the rotor bracket and the rear end cover; When the support plate is fixedly connected to the cover plate as a whole, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the cover plate; when the support plate is fixedly connected to the end face of the recessed portion as a whole, a second limiting bearing is provided between the support frame in the middle of the rotor bracket and the end face of the recessed portion; The first limiting bearing and the second limiting bearing cooperate to form a paired double-limiting and supporting structure for the rotor bracket.

5. The vehicle hub motor according to claim 3, wherein, A positioning device is provided on the outer ring of the rotor bracket. The positioning device and the outer ring of the rotor bracket cooperate to form a concave mechanism, and the rotor part is nested in the concave mechanism.

6. The in-wheel motor for vehicle according to claim 3, characterized in that The planet carrier is connected to the reducer cavity through bearing pairs arranged on the left and right sides of the ring gear.

7. The vehicle hub motor according to claim 3, wherein, The minimum clearance between the brake disc and the brake pads in the non-braking state is greater than 0.1 mm.

8. The vehicle hub motor according to claim 4, wherein, It further includes a driver provided on the inner side of the rear end cover. The driver is electrically connected to the coil of the stator through a bus bar provided at the end of the stator, and drives the rotor to rotate under set control.

9. The vehicle hub motor according to claim 4, wherein, It further includes a plurality of control arm connection points provided on the outer end face of the rear end cover. The control arm connection points are used to install a control arm connected to the vehicle body.

10. A vehicle, characterized in that, It includes the vehicle hub motor according to any one of claims 1-9.

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