CN114696531A

CN114696531A - In-wheel motor and car

Info

Publication number: CN114696531A
Application number: CN202011632925.XA
Authority: CN
Inventors: 吴文镜; 金明亮
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Shanghai Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Shanghai Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01

Abstract

The invention discloses an in-wheel motor and a vehicle, the in-wheel motor comprises a stator, a rotor, a hub, a speed reducer and a brake, the rotor is sleeved outside the stator and can rotate relative to the stator, the hub is fixedly sleeved outside the rotor, the speed reducer comprises a low-speed end and a high-speed end, the rotating speed of the low-speed end is smaller than that of the high-speed end, the low-speed end is connected with the rotor, and the brake is connected with the high-speed end, so that the output torque of the rotor is reduced by the speed reducer and then transmitted to the brake, the braking torque required by the brake can be reduced, the size of the brake is further reduced, the in-wheel motor can realize the effect of higher direct drive control precision, occupy smaller space, improve the motion reliability of a drive system and reduce the preparation difficulty and cost.

Description

In-wheel motor and car

Technical Field

The invention relates to the technical field of motors, in particular to a hub motor and a vehicle.

Background

The hub motor can simplify a driving system and a whole vehicle structure of a vehicle, improve transmission efficiency, increase the available space of a chassis, and realize the dynamic control of a complex vehicle, and is an important development direction of vehicle driving at present.

The inventor of the application discovers in long-term research and development that the size of the common hub motor is large at present, so that the occupied space of the common hub motor is large, the control of the hub motor is difficult, and the running reliability of the whole driving system is low, and the preparation difficulty and the cost are also high.

Disclosure of Invention

The invention provides a hub motor and a vehicle, and aims to solve the technical problems that in the prior art, the hub motor occupies a large space, is low in operation reliability and is poor in structure compactness.

In order to solve the above technical problem, one technical solution adopted by the present invention is to provide an in-wheel motor, including:

a stator;

the rotor is sleeved outside the stator and can rotate relative to the stator;

the hub is fixedly sleeved outside the rotor;

the speed reducer comprises a low-speed end and a high-speed end, the rotating speed of the low-speed end is smaller than that of the high-speed end, and the low-speed end is connected with the hub;

and the brake is connected with the high-speed end, so that the output torque of the rotor is reduced by the speed reducer and then is transmitted to the brake.

In a specific embodiment, the speed reducer is disposed in the stator, and the projection of the stator, the rotor, and the speed reducer in the radial direction of the rotor are all located in the projection of the hub in the radial direction of the rotor.

In a specific embodiment, the hub motor further comprises an encoder, and the encoder is connected with the high-speed end.

In a specific embodiment, the speed reducer is a planetary speed reducer, the planetary speed reducer includes a planet carrier, a planet wheel and a sun wheel, the planet wheel is rotatably disposed on the planet carrier, the low-speed end is the planet carrier or the low-speed end is connected to the planet carrier, and the high-speed end is the sun wheel or the high-speed end is connected to the sun wheel.

In a specific embodiment, the in-wheel motor further includes a support frame, the support frame is disposed in the stator, the planet carrier is disposed in the support frame, a gear ring is disposed inside the support frame, and the gear ring is engaged with the planet gear.

In a specific embodiment, the in-wheel motor further includes a hub cover covering one side of the hub, the hub and the hub cover together form a first accommodating cavity, the stator, the rotor and the speed reducer are all located in the first accommodating cavity, a main bearing is arranged between the support frame and the hub cover, and a planet carrier support bearing is arranged between the support frame and the planet carrier.

In a specific embodiment, the in-wheel motor further includes a connecting frame, the connecting frame is connected with the supporting frame, the connecting frame forms a second accommodating cavity, the brake is disposed on the connecting frame and located in the second accommodating cavity, and the brake is connected with the sun gear through a transfer shaft.

In a specific embodiment, the connection frame includes a suspension connection flange and a brake connection flange, the brake connection flange is formed with a support groove, the suspension connection flange is used for connecting with an external suspension, the brake connection flange is used for connecting with the brake, and a transfer shaft support bearing is arranged between the support groove and the transfer shaft.

In a specific embodiment, a reducer connecting hole is formed at one end of the transfer shaft, the reducer connecting hole extends along the axial direction of the transfer shaft and is used for being connected with a reducer, the brake is sleeved at the other end of the transfer shaft, an encoder connecting hole is formed at the other end of the transfer shaft, and the encoder connecting hole extends along the axial direction of the transfer shaft and is used for being connected with an encoder.

In a specific embodiment, the in-wheel motor further includes a central shaft, a ring encoder sleeved outside the central shaft, and a support frame sleeved outside the ring encoder, the stator is sleeved outside the support frame, one end of the central shaft is connected to the wheel hub, and the other end of the central shaft is connected to the low-speed end.

In a specific embodiment, a square first shaft hole is formed in the hub, a square second shaft hole is formed in the planet carrier of the speed reducer, a square first shaft end and a square second shaft end are respectively arranged at two ends of the central shaft, the first shaft hole is connected with the first shaft end in a matched mode, and the second shaft hole is connected with the second shaft end in a matched mode.

In order to solve the technical problem, another technical scheme adopted by the invention is to provide a vehicle, which comprises a vehicle body and the in-wheel motor, wherein the in-wheel motor is arranged on the vehicle body and is used for driving the vehicle body to move.

The hub motor comprises a stator, a rotor, a hub, a speed reducer and a brake, wherein the rotor is sleeved outside the stator and can rotate relative to the stator, the hub is fixedly sleeved outside the rotor, the speed reducer comprises a low-speed end and a high-speed end, the rotating speed of the low-speed end is smaller than that of the high-speed end, the low-speed end is connected with the rotor, and the brake is connected with the high-speed end, so that the output torque of the rotor is reduced by the speed reducer and then transmitted to the brake, the braking torque required by the brake can be reduced, the size of the brake is further reduced, the hub motor can achieve the effect of high direct drive control precision, the hub motor can occupy smaller space, the motion reliability of a driving system can be improved, and the preparation difficulty and the cost can be reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic perspective view of an embodiment of a hub motor according to the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of the hub motor of the present invention;

FIG. 3 is a schematic cross-sectional view of a support frame in an embodiment of the hub motor of the present invention;

FIG. 4 is a schematic cross-sectional view of an embodiment of an electric hub motor according to the present invention;

FIG. 5 is a schematic cross-sectional view of a connecting frame of an embodiment of the hub motor of the present invention;

FIG. 6 is a schematic perspective view of another embodiment of the hub motor of the present invention;

FIG. 7 is a cross-sectional view of another embodiment of the hub motor of the present invention;

FIG. 8 is a schematic perspective view of a hub in another embodiment of the hub motor of the present invention;

FIG. 9 is a schematic perspective view of a central shaft of another embodiment of the hub motor of the present invention;

fig. 10 is a cross-sectional structural view of a part of the structure of another embodiment of the hub motor of the present invention;

FIG. 11 is a cross-sectional view of the support bracket of another embodiment of the hub motor of the present invention;

FIG. 12 is a schematic perspective view of an encoder mounting plate in another embodiment of the hub motor of the present invention;

FIG. 13 is a cross-sectional view of the connecting frame of another embodiment of the hub motor of the present invention;

fig. 14 is a schematic perspective view of an embodiment of the cart of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. While the term "and/or" is merely one type of association that describes an associated object, it means that there may be three types of relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1 and 2, an embodiment of the in-wheel motor 10 of the present invention includes a stator 111, a rotor 112, a hub 113, a speed reducer 120 and a brake 130, wherein the rotor 112 is sleeved outside the stator 111 and can rotate relative to the stator 111, the hub 113 is fixedly sleeved outside the rotor 112, the speed reducer 120 includes a low-speed end and a high-speed end, the rotation speed of the low-speed end is less than that of the high-speed end, the low-speed end is connected to the hub 113, and the brake 130 is connected to the high-speed end, so that the output torque of the rotor 112 is reduced by the speed reducer 120 and then transmitted to the brake 130.

The conventional hub motor mainly comprises two driving modes, namely a motor and a speed reducer which are connected in series, and a direct drive motor, wherein in the mode of connecting the motor and the speed reducer in series, the power torque output by the motor is smaller and can be increased through the speed reducer, so that the motor can be connected with a brake with smaller braking torque to realize braking, but the motor is respectively connected with the speed reducer and the brake in series, and although the brake with smaller braking torque has smaller volume, the whole driving system still has longer axial dimension along the motor and larger occupied space; in the mode of directly driving the motor, owing to save the transmission process of reduction gear, control is more accurate, but because the power moment of motor output is great, consequently need connect the great stopper of a braking moment and realize the braking, can cause the volume of stopper great, and then cause whole actuating system's occupation space great. Therefore, the two modes can cause the lower operation reliability of the driving system and higher preparation difficulty and cost. And in this application, the output torque of the rotor 112 is reduced by the reducer 120 and then transmitted to the brake 130, so that the braking torque required by the brake 130 can be reduced, and further the volume of the brake 130 is reduced, so that the in-wheel motor 10 can achieve the effect of high direct drive control precision, and can occupy a smaller space, and further the motion reliability of the drive system can be improved, and the preparation difficulty and cost can be reduced.

In the present embodiment, the speed reducer 120 is disposed in the stator 111, and the radial projections of the stator 111, the rotor 112 and the speed reducer 120 on the rotor 112 are all located in the radial projection of the hub 113 on the rotor 112, so that the speed reducer 120 can occupy no additional space, and the in-wheel motor 10 has a more compact structure and a smaller volume.

In this embodiment, the in-wheel motor 10 further includes a supporting frame 140, the supporting frame 140 is disposed in the stator 111, and the speed reducer 120 is fixedly disposed in the supporting frame 140, so that the speed reducer 120 is more stably fixed in the stator 111, and the reliability of the in-wheel motor 10 is higher.

In the present embodiment, the speed reducer 120 is a planetary speed reducer, the planetary speed reducer includes a planet carrier 121, a planet wheel 122 and a sun wheel 123, the planet wheel 122 is rotatably disposed on the planet carrier 121, the planet carrier 121 is disposed at a low-speed end, and the sun wheel 123 is disposed at a high-speed end, so that the output torque of the rotor 112 can be reduced by the speed reducer 120 and then transmitted to the brake 130, and the output speed of the rotor 112 is increased by the speed reducer 120 and then transmitted to the brake 130.

In other embodiments, the low-speed end and the high-speed end may also be shafts independent from the speed reducer 120, the low-speed end is connected to the carrier 121, and the high-speed end is connected to the sun gear 123, which is not limited herein.

In other embodiments, the speed reducer 120 may also be another type of speed reducer such as a cylindrical gear speed reducer, and is not limited herein.

Referring to fig. 3, in the present embodiment, a ring gear 141 is disposed inside the supporting frame 140, the planet carrier 121 is disposed inside the supporting frame 140, and the ring gear 141 is meshed with the planet gear 122, so that the planet gear 122 is more stable in the rotating process, and the reliability of the in-wheel motor 10 is improved.

In this embodiment, the gear ring 141 may be integrally formed on the supporting frame 140, so that the structure thereof is more stable.

In other embodiments, the gear ring 141 may also be fixedly connected to the supporting frame 140 by a key connection, an interference fit, a screw fixation, or an adhesion manner, which is not limited herein.

In the embodiment, the first wire hole 142 is formed at one end of the supporting frame 140 away from the hub 113, and the first wire hole 142 is used for accommodating a connecting wire (not shown in the figure) of the stator 111 or the rotor 112, so that the interference between the connecting wire and other components can be avoided, the abrasion of the connecting wire is reduced, and the reliability of the in-wheel motor 10 is improved.

In this embodiment, the in-wheel motor 10 further includes a hub cover 114 covering one side of the hub 113, the hub 113 and the hub cover 114 together form a first accommodating cavity, the stator 111, the rotor 112 and the speed reducer 120 are all located in the first accommodating cavity, so as to protect the stator 111, the rotor 112 and the speed reducer 120, and prevent the stator 111, the rotor 112 and the speed reducer 120 from being damaged by pollution of an external environment.

In this embodiment, a main bearing 151 is disposed between the support frame 140 and the hub cover 114, a planet carrier supporting bearing 152 is disposed between the support frame 140 and the planet carrier 121, the main bearing 151 and the planet carrier supporting bearing 152 are staggered on the support frame 140, the support frame 140 can be better supported, the planet carrier supporting bearing 152 can support the rotation of the hub 113, and the planet carrier 121 can also be supported, the structure of the hub motor 10 is simpler, the size and the weight of the hub motor 10 are further reduced, the wear between the support frame 140 and the hub cover 114 and the wear between the planet carrier 121 can be reduced by disposing the main bearing 151 and the planet carrier supporting bearing 152, and the service lives of the support frame 140, the hub cover 114 and the planet carrier 121 are prolonged.

Wherein the brake 130 can be connected with the high-speed end of the decelerator 120 through the transfer shaft 160. In the present embodiment, the brake 130 is connected to the sun gear 123 through the coupling shaft 160, so that the brake 130 can brake the hub 113 through the coupling shaft 160.

In other embodiments, the sun gear 123 and the transfer shaft 160 may be integrally provided, so that the structure is simpler and the occupied space is further reduced.

Referring to fig. 4, in the present embodiment, a reducer connection hole 161 is formed at one end of the adapter shaft 160, the reducer connection hole 161 extends along an axial direction of the adapter shaft 160 and is used for being connected to the reducer 120, specifically, the sun gear 123, and the brake 130 is sleeved at the other end of the adapter shaft 160, so that power generated by the rotor 112 can be output through the reducer 120 and the adapter shaft 160, and the brake 130 can brake the rotor 112 through the adapter shaft 160 and the reducer 120.

In this embodiment, the in-wheel motor 10 further includes an encoder 170, and the encoder 170 is connected to the high-speed end. Specifically, an encoder connecting hole 162 is formed at one end of the adapter shaft 160, which is far away from the reducer connecting hole 161, the encoder connecting hole 162 extends along the axial direction of the adapter shaft 160, the encoder 170 is connected with the adapter shaft 160 through the encoder connecting hole 162, and the control precision of the hub 113 can be improved by arranging the encoder 170, so that the reliability of the hub motor 10 is improved.

In this embodiment, the connection between the adapter shaft 160 and the speed reducer 120 and the encoder 170 may be a key connection. In other embodiments, the connection between the adapter shaft 160 and the speed reducer 120 and the encoder 170 may also be an interference fit, and the like, which is not limited herein.

In this embodiment, an encoder locking hole 163 may be further formed at one end of the encoder 170, which is far away from the reducer connecting hole 161, the encoder locking hole 163 is communicated with the encoder connecting hole 162, and extends along the radial direction of the adapting shaft 160, so that a locking member (not shown in the figure) can extend into the encoder connecting hole 162 through the encoder locking hole 163, and acts on the portion of the encoder 170 in the encoder connecting hole 162, thereby locking the encoder 170 and the adapting shaft 160, so that the connection between the encoder 170 and the adapting shaft 160 is more stable, and the stability and reliability of the overall structure of the in-wheel motor 10 are improved.

In this embodiment, in-wheel motor 10 further can include link 180, link 180 is connected with support frame 140, link 180 forms second holding chamber, stopper 130 sets up on link 180 and is located second holding chamber, can play the supporting role to stopper 130 through setting up link 180, can play the guard action to stopper 130 again, can avoid the pollution of stopper 130 external environment to cause the damage, link 180, stopper 130 and support frame 140, the connection structure of parts such as reduction gear 120 is compact, make in-wheel motor 10's whole volume less, occupation space is less.

Referring to fig. 5, in the present embodiment, the connection frame 180 includes a connection frame main body 181, a suspension connection flange 182, and a brake connection flange 183, the suspension connection flange 182 is sleeved outside the connection frame main body 181 and is used for being connected to an external suspension (not shown in the figure), the brake connection flange 183 is disposed at one end of the connection frame main body 181 and is used for being connected to the brake 130, wherein the connection frame main body 181, the suspension connection flange 182, and the brake connection flange 183 may be integrally formed, so that the structure of the connection frame 180 is more stable.

In other embodiments, the connecting frame body 181, the suspension connecting flange 182, and the brake connecting flange 183 may also be fixedly connected by welding, adhering, or snapping, which is not limited herein.

In this embodiment, a supporting groove 184 is formed at one end of the brake connecting flange 183 far from the connecting frame main body 181, and a transfer shaft supporting bearing 153 may be disposed between the supporting groove 184 and the transfer shaft 160, so as to support the transfer shaft 160, so that the transfer shaft 160 is more stable in the rotating process, abrasion between the connecting frame 180 and the transfer shaft 160 can be reduced, and the service lives of the connecting frame 180 and the transfer shaft 160 can be prolonged.

In this embodiment, the link body 181 may be formed with a second wire hole 185 and a third wire hole 186, the second wire hole 185 penetrates the link body 181 along an axial direction of the link body 181 to accommodate a connection wire of the stator 111 or the rotor 112, and the third wire hole 186 penetrates the link body 181 along a radial direction of the link body 181 and communicates with the second wire hole 185 to accommodate a connection wire of the brake 130, so as to avoid interference between the connection wire and other components, thereby reducing wear of the connection wire and improving reliability of the in-wheel motor 10.

In this embodiment, the in-wheel motor 10 may further include a rubber wheel 115, and the rubber wheel 115 is sleeved outside the wheel hub 113 and can provide a buffering effect for the stress of the wheel hub 113.

Referring to fig. 6 and 7, another embodiment of the in-wheel motor 20 of the present invention includes a stator 211, a rotor 212, a hub 213, a speed reducer 220 and a brake 230, wherein the rotor 212 is sleeved outside the stator 211 and can rotate relative to the stator 211, the hub 213 is fixedly sleeved outside the rotor 212, the speed reducer 220 includes a low-speed end and a high-speed end, the rotating speed of the low-speed end is less than the rotating speed of the high-speed end, the low-speed end is connected to the hub 213, and the brake 230 is connected to the high-speed end, such that the output torque of the rotor 212 is reduced by the speed reducer 220 and then transmitted to the brake 230, the braking torque required by the brake 230 can be reduced, and further the volume of the brake 230 is reduced, such that the in-wheel motor 20 can achieve an effect of high direct drive control accuracy, and occupy a smaller space, thereby improving the motion reliability of a driving system, and reducing the manufacturing difficulty and cost.

In this embodiment, the in-wheel motor 20 further includes a central shaft 240, a ring encoder 250 sleeved outside the central shaft 240, and a supporting frame 260 sleeved outside the ring encoder 250, the stator 211 is sleeved outside the supporting frame 260, one end of the central shaft 240 is connected to the wheel hub 213, and the other end of the central shaft 240 is connected to the low-speed end. The annular encoder 250 is directly connected to the rotor 212 through the central shaft 240 and the hub 213, and the transmission process of the speed reducer 220 is omitted, so that the control accuracy of the annular encoder 250 can be further improved.

In the present embodiment, the projections of the stator 211, the rotor 212 and the annular encoder 250 in the radial direction of the rotor 212 are located in the projection of the hub 213 in the radial direction of the rotor 212, so that the annular encoder 250 can occupy no extra space, and the in-wheel motor 20 is more compact in structure and smaller in volume.

In this embodiment, the in-wheel motor 20 further includes a hub cover 214 covering one side of the hub 213, the hub 213 and the hub cover 214 together form an accommodating cavity, the stator 211, the rotor 212 and the annular encoder 250 are all located in the accommodating cavity, which can protect the stator 211, the rotor 212 and the annular encoder 250, and prevent the stator 211, the rotor 212 and the annular encoder 250 from being damaged by the pollution of the external environment.

In this embodiment, the speed reducer 220 is a planetary speed reducer, and the planetary speed reducer includes a planet carrier 221, a planet wheel 222 and a sun wheel 223, which are engaged with each other, and the structure thereof is similar to the speed reducer 120 in the above embodiment, and the description thereof is omitted. The carrier 221 is fixedly connected to the central shaft 240, and the sun gear 223 is connected to the brake 230.

In the present embodiment, the brake 230 may be connected to the decelerator 220 through the transfer shaft 231. Specifically, a reducer connection hole (not shown) is formed at one end of the transfer shaft 231, the sun gear 223 is fixedly connected to the transfer shaft 231 through the reducer connection hole, and the brake 230 is sleeved at the other end of the transfer shaft 231, so that the brake 230 can brake the rotor 212 through the transfer shaft 231 and the reducer 220.

Referring to fig. 8 and 9 together, in the present embodiment, a square first shaft hole 215 is formed in the hub 213, a square second shaft hole (not shown) is formed in the planet carrier 221, a square first shaft end 241 and a square second shaft end 242 are respectively disposed at two ends of the central shaft 240, the first shaft hole 215 is connected to the first shaft end 241, and the second shaft hole is connected to the second shaft end 242, so that the central shaft 240 can be prevented from sliding relative to the hub 213 or the planet carrier 221 when rotating with the hub 213, and the reliability of the in-wheel motor 20 can be improved.

Referring to fig. 10 to 12 together, in this embodiment, a wiring groove 261 may be formed on an inner wall of the supporting frame 260, and the wiring groove 261 extends along an axial direction of the supporting frame 260 and is used for accommodating a connection line of the stator 211 or the rotor 212, so that the connection line can be prevented from interfering with other components, thereby reducing wear of the connection line and improving reliability of the in-wheel motor 20.

In this embodiment, the inner wall of the supporting bracket 260 may further be formed with a mounting groove 262, and the in-wheel motor 20 may further include an encoder mounting plate 251, the encoder mounting plate 251 being disposed on the mounting groove 262, the first mounting hole 252 and the second mounting hole 253 are formed on the encoder mounting plate 251, the annular encoder 250 is provided with a third mounting hole (not marked in the figure) corresponding to the first mounting hole 252, the annular encoder 250 is fixedly connected with the encoder mounting plate 251 through the first mounting hole 252, the third mounting hole and a first fixing member (for example, a screw, etc.), the support frame 260 is provided with a fourth mounting hole (not marked in the figure) corresponding to the second mounting hole 253, and the support frame 260 is fixedly connected with the encoder mounting plate 251 through the second mounting hole 253, the fourth mounting hole and the second fixing member (for example, a screw, etc.), so that the annular encoder 250 is stably mounted on the support frame 260.

In this embodiment, the number of the encoder mounting plates 251 may be two, and the two encoder mounting plates 251 are symmetrically disposed on the inner wall of the supporting frame 260, so as to further improve the stability of the annular encoder 250.

Referring to fig. 13, in the present embodiment, the in-wheel motor 20 further includes a connecting frame 270, the connecting frame 270 is connected to the supporting frame 260, the connecting frame 270 is located on a side of the hub cover 214 away from the wheel hub 213, a suspension connecting flange 271 is disposed on the connecting frame 270, and the suspension connecting flange 271 is used for connecting with an external suspension (not shown in the figure) for mounting the in-wheel motor 20.

In this embodiment, the connecting frame 270 is formed with a wire passing hole 272, the wire passing hole 272 passes through the connecting frame 270 along the axial direction of the connecting frame 270, and is used for accommodating the connecting wire of the stator 211, the rotor 212 or the annular encoder 250, so as to avoid the interference of the connecting wire with other components, thereby reducing the wear of the connecting wire and improving the reliability of the in-wheel motor 20.

In this embodiment, the in-wheel motor 20 further includes a ring gear rack 224, the ring gear rack 224 is disposed on a side of the connecting frame 270 away from the hub cover 214, a ring gear (not shown) is disposed on an inner wall of the ring gear rack 224, the planet carrier 221 is disposed in the ring gear rack 224, and the ring gear is engaged with the planet gear 222, so that the planet gear 222 is more stable in the rotating process, and the reliability of the in-wheel motor 20 is improved.

Referring to fig. 14, the vehicle according to the embodiment of the present invention includes a vehicle body 30 and an in-wheel motor 40, wherein the in-wheel motor 40 is disposed on the vehicle body 30 and is used for driving the vehicle body 30 to move. The structure of the in-wheel motor 40 refers to the above-mentioned embodiment of the in-wheel motor, and is not described herein again.

In this embodiment, the hub motor 40 transmits the output torque of the rotor to the brake after being reduced by the reducer, so that the braking torque required by the brake can be reduced, and the size of the brake is reduced, so that the hub motor 40 can realize the effect of high direct drive control precision, and can occupy a smaller space, and further the motion reliability of the driving system can be improved, and the preparation difficulty and the cost can be reduced.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An in-wheel motor, comprising:

a stator;

the rotor is sleeved outside the stator and can rotate relative to the stator;

the hub is fixedly sleeved outside the rotor;

the speed reducer comprises a low-speed end and a high-speed end, the rotating speed of the low-speed end is less than that of the high-speed end, and the low-speed end is connected with the hub;

2. The in-wheel motor according to claim 1, wherein the reducer is disposed in the stator, and the stator, the rotor, and a projection of the reducer in a radial direction of the rotor are all located in a projection of the hub in a radial direction of the rotor.

3. The in-wheel motor of claim 1, further comprising an encoder coupled to the high speed end.

4. The in-wheel motor according to claim 1, wherein the reducer is a planetary reducer, the planetary reducer comprises a planet carrier, a planet wheel meshed with the planet wheel and a sun wheel, the planet wheel is rotatably arranged on the planet carrier, the low-speed end is the planet carrier or the low-speed end is connected with the planet carrier, and the high-speed end is the sun wheel or the high-speed end is connected with the sun wheel.

5. The in-wheel motor of claim 4, further comprising a support frame disposed within the stator, wherein the planet carrier is disposed within the support frame, and wherein a ring gear is disposed inside the support frame and is engaged with the planet gears.

6. The in-wheel motor according to claim 5, further comprising a hub cover covering one side of the hub, wherein the hub and the hub cover together form a first accommodating cavity, the stator, the rotor and the speed reducer are located in the first accommodating cavity, a main bearing is disposed between the supporting frame and the hub cover, and a planet carrier supporting bearing is disposed between the supporting frame and the planet carrier.

7. The in-wheel motor of claim 5, further comprising a connecting frame, wherein the connecting frame is connected with the supporting frame, the connecting frame forms a second accommodating cavity, the brake is arranged on the connecting frame and located in the second accommodating cavity, and the brake is connected with the sun gear through a transfer shaft.

8. The in-wheel motor according to claim 7, wherein the connection bracket comprises a suspension connection flange and a brake connection flange, the brake connection flange is formed with a support groove, the suspension connection flange is used for connecting with an external suspension, the brake connection flange is used for connecting with the brake, and an adapter shaft support bearing is arranged between the support groove and the adapter shaft.

9. The in-wheel motor according to claim 3, wherein a reducer connecting hole is formed at one end of the coupling shaft, the reducer connecting hole extends along the axial direction of the coupling shaft and is used for being connected with the reducer, the brake sleeve is arranged at the other end of the coupling shaft, an encoder connecting hole is formed at the other end of the coupling shaft, and the encoder connecting hole extends along the axial direction of the coupling shaft and is used for being connected with the encoder.

10. The in-wheel motor of claim 1, further comprising a central shaft, a ring encoder sleeved outside the central shaft, and a supporting frame sleeved outside the ring encoder, wherein the stator is sleeved outside the supporting frame, one end of the central shaft is connected to the wheel hub, and the other end of the central shaft is connected to the low-speed end.

11. The in-wheel motor according to claim 10, wherein a square first shaft hole is formed in the hub, a square second shaft hole is formed in the planet carrier of the speed reducer, a square first shaft end and a square second shaft end are respectively arranged at two ends of the central shaft, the first shaft hole is connected with the first shaft end in a matched mode, and the second shaft hole is connected with the second shaft end in a matched mode.

12. A vehicle comprising a vehicle body and an in-wheel motor according to any one of claims 1 to 11, wherein the in-wheel motor is arranged on the vehicle body and used for driving the vehicle body to move.