WO2022142971A1

WO2022142971A1 - Hub motor and vehicle

Info

Publication number: WO2022142971A1
Application number: PCT/CN2021/134654
Authority: WO
Inventors: 吴文镜; 金明亮
Original assignee: 广东美的制冷设备有限公司; 美的集团(上海)有限公司
Priority date: 2020-12-31
Filing date: 2021-11-30
Publication date: 2022-07-07

Abstract

Disclosed in the present invention is a hub motor and a vehicle. The hub motor comprises stators, rotors, a hub, a decelerator, and a brake; each rotor is sleeved outside each stator and can rotate relative to the stator; the hub is fixedly sleeved outside the rotor; the decelerator comprises a low-speed end and a high-speed end; the rotation speed of the low-speed end is less than the rotation speed of the high-speed end; the low-speed end is connected to the rotor; and the brake is connected to the high-speed end, so that the output torque of the rotor is reduced by the decelerator and then is transmitted to the brake. Therefore, the present invention can reduce the braking torque required by the brake and further reduce the size of the brake, so that the hub motor can achieve the effect of high direct drive control precision, and also can occupy a smaller space, thereby being capable of improving the motion reliability of a driving system, and reducing the manufacturing difficulty and cost.

Description

In-wheel motor and vehicle

This application claims the priority of the Chinese patent application with the application number 202011632925X filed on December 31, 2020, and the invention title is "An in-wheel motor and vehicle", which is fully incorporated into this application by reference.

【Technical field】

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

【Background technique】

In-wheel motors can simplify the drive system and vehicle structure of the vehicle, improve the transmission efficiency, increase the space available for the chassis, and realize the dynamic control of complex vehicles. It is an important development direction of vehicle drive at present.

The inventor of the present application found in the long-term research and development that the size of the general in-wheel motor is relatively large at present, which leads to a large space occupied, which in turn makes the control of the in-wheel motor difficult, and the operation reliability of the entire drive system is low. Difficulty and cost are also high.

[Content of the invention]

The present invention provides an in-wheel motor and a vehicle, so as to solve the technical problems in the prior art that the in-wheel motor occupies a large space, has low operational reliability, and has poor structural compactness.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a kind of in-wheel motor, including:

stator;

a rotor sleeved outside the stator and capable of rotating relative to the stator;

a wheel hub, which is fixedly sleeved outside the rotor;

a speed reducer, the speed reducer includes a low-speed end and a high-speed end, the rotation speed of the low-speed end is lower than the rotation speed of the high-speed end, and the low-speed end is connected to the wheel hub;

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

In a specific embodiment, the reducer is arranged in the stator, and the projections of the stator, the rotor and the reducer on the radial direction of the rotor are all located on the radial direction of the rotor of the hub. In the upward projection.

In a specific embodiment, the in-wheel motor further includes an encoder connected to the high-speed end.

In a specific embodiment, the reducer is a planetary reducer, and the planetary reducer includes a planet carrier, a planetary gear and a sun gear that mesh with each other, and the planetary gear is rotatably arranged on the planetary carrier, so 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 gear or the high-speed end is connected to the sun gear.

In a specific embodiment, the in-wheel motor further includes a support frame, the support frame is arranged in the stator, the planet carrier is arranged in the support frame, and a ring gear is arranged inside the support frame, so The ring gear meshes with the planetary gear.

In a specific embodiment, the in-wheel motor further includes a hub cover disposed on one side of the hub, the hub and the hub cover together form a first accommodating cavity, the stator, the rotor and the The speed reducers 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, and the brake is arranged on the connecting frame and is located in the connecting frame. In the second accommodating cavity, 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, and the suspension connection flange is used for connecting with an external suspension, The brake connecting flange is used for connecting with the brake, and an adapter shaft support bearing is arranged between the support groove and the adapter shaft.

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

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 annular encoder, and the stator sleeves are sleeved on the Outside the support frame, one end of the central shaft is connected with the hub, and the other end of the central shaft is connected with the low-speed end.

In a specific embodiment, a square first shaft hole is formed on the hub, a square second shaft hole is formed on the planet carrier of the reducer, and both ends of the central shaft are respectively provided with a square first shaft hole. A shaft end and a second shaft end, the first shaft hole is matched with the first shaft end, and the second shaft hole is matched with the second shaft end.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a vehicle, including a vehicle body and the above-mentioned in-wheel motor, wherein the in-wheel motor is arranged on the vehicle body and is used to drive the vehicle body to move. .

The hub motor of the present invention includes a stator, a rotor, a hub, a reducer and a brake. The rotor is sleeved outside the stator and can rotate relative to the stator. The hub is fixed sleeved outside the rotor. The reducer includes a low-speed end and a high-speed end. The rotation speed of the low-speed end Less than the rotation speed of the high end, the low speed end is connected to the rotor, and the brake is connected to the high speed end, so that the output torque of the rotor is reduced by the reducer and then transmitted to the brake, which can reduce the braking torque required by the brake, thereby reducing the brake force. Due to its size, the in-wheel motor can not only achieve the effect of high direct drive control accuracy, but also occupy a smaller space, thereby improving the motion reliability of the drive system and reducing the difficulty and cost of manufacture.

【Description of drawings】

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is a schematic three-dimensional structure diagram of an embodiment of an in-wheel motor of the present invention;

2 is a schematic cross-sectional structural diagram of an embodiment of the in-wheel motor of the present invention;

3 is a schematic cross-sectional structural diagram of a support frame in an embodiment of the in-wheel motor of the present invention;

4 is a schematic cross-sectional structural diagram of an adapter shaft in an embodiment of the in-wheel motor of the present invention;

5 is a schematic cross-sectional structural diagram of a connecting frame in an embodiment of the in-wheel motor of the present invention;

6 is a schematic three-dimensional structure diagram of another embodiment of the in-wheel motor of the present invention;

7 is a schematic cross-sectional structural diagram of another embodiment of the in-wheel motor of the present invention;

8 is a schematic three-dimensional structure diagram of a wheel hub in another embodiment of the in-wheel motor of the present invention;

9 is a schematic three-dimensional structure diagram of a central shaft in another embodiment of the in-wheel motor of the present invention;

10 is a schematic cross-sectional structural diagram of a partial structure in another embodiment of the in-wheel motor of the present invention;

11 is a cross-sectional structural schematic diagram of a support frame in another embodiment of the in-wheel motor of the present invention;

Figure 12 is a schematic three-dimensional structure diagram of an encoder mounting plate in another embodiment of the in-wheel motor of the present invention;

13 is a cross-sectional structural schematic diagram of a connecting frame in another embodiment of the in-wheel motor of the present invention;

FIG. 14 is a schematic three-dimensional structure diagram of an embodiment of a vehicle of the present invention.

【Detailed ways】

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first" and "second" in this application are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices. The term "and/or" is only an association relationship to describe the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone these three situations. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

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 reducer 120 and a brake 130. The rotor 112 is sleeved outside the stator 111 and can rotate relative to the stator 111. The hub 113 The speed reducer 120 is fixedly sleeved outside the rotor 112. The reducer 120 includes a low-speed end and a high-speed end. The rotation speed of the low-speed end is lower than the rotation speed of the high-speed end. The speed reducer 120 is reduced and transmitted to the brake 130 .

At present, in-wheel motors mainly include two drive modes: motor and reducer in series, and direct drive motor. In the series connection of motor and reducer, the power torque output by the motor is small, which can be increased by the reducer, so the motor can be connected to a The brake with smaller braking torque can realize braking, but the motor is arranged in series with the reducer and the brake. Although the size of the brake with smaller braking torque is smaller, it will still cause the entire drive system to be longer in the axial direction of the motor. , occupies a large space; in the direct drive motor mode, because the transmission process of the reducer is omitted, the control is more accurate, but due to the large power torque output by the motor, it is necessary to connect a brake with a large braking torque to realize the control If the brake is moved, the volume of the brake will be larger, and the space occupied by the entire drive system will be larger. Therefore, the above two methods will lead to lower operational reliability of the drive system, higher manufacturing difficulty and higher cost. In the present application, the output torque of the rotor 112 is reduced by the reducer 120 and then transmitted to the brake 130, which can reduce the braking torque required by the brake 130, thereby reducing the volume of the brake 130, so that the in-wheel motor 10 can be directly driven The effect of higher control precision can occupy a smaller space, thereby improving the motion reliability of the drive system and reducing the difficulty and cost of preparation.

In this embodiment, the speed reducer 120 is arranged in the stator 111, and the projections of the stator 111, the rotor 112 and the speed reducer 120 on the radial direction of the rotor 112 are all located within the projection of the hub 113 on the radial direction of the rotor 112, so that the speed reducer 120 can not occupy additional space, so that 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 support frame 140 , the support frame 140 is arranged in the stator 111 , and the reducer 120 is fixedly arranged in the support frame 140 , so that the reducer 120 can be more stably fixed in the stator 111 , so that the The in-wheel motor 10 is more reliable.

In this embodiment, the reducer 120 is a planetary reducer, and the planetary reducer includes a planet carrier 121, a planetary gear 122 and a sun gear 123 that mesh with each other. The planetary gear 122 is rotatably arranged on the planetary carrier 121, and the low-speed end is a planetary gear. The frame 121, the high-speed end is the sun gear 123, so that the output torque of the rotor 112 can be reduced by the reducer 120 and then transmitted to the brake 130, and the output speed of the rotor 112 can be increased by the reducer 120 and then transmitted to the brake 130.

In other embodiments, the low-speed end and the high-speed end may also be shaft bodies independent of the reducer 120 , the low-speed end is connected to the planet carrier 121 , and the high-speed end is connected to the sun gear 123 , which is not limited here.

In other embodiments, the reducer 120 may also be other types of reducers such as a cylindrical gear reducer, which is not limited herein.

Referring to FIG. 3 , in this embodiment, a ring gear 141 is arranged inside the support frame 140 , the planetary carrier 121 is arranged in the support frame 140 , and the ring gear 141 meshes with the planetary gear 122 , so that the planetary gear 122 can rotate during the rotation process. It is more stable and improves the reliability of the in-wheel motor 10.

In this embodiment, the ring gear 141 can be integrally formed on the support frame 140 to make its structure more stable.

In other embodiments, the ring gear 141 can also be fixedly connected to the support frame 140 by means of key connection, interference fit, screw fixing or sticking, which is not limited herein.

In this embodiment, a first wiring hole 142 is formed at one end of the support frame 140 away from the hub 113 , and the first wiring hole 142 is used for accommodating the connecting wire of the stator 111 or the rotor 112 (not shown in the figure), and can The interference of the connecting wire with other components is avoided, thereby reducing the wear of the connecting wire and improving the reliability of the in-wheel motor 10 .

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, and the stator 111 , the rotor 112 and the reducer 120 are all located in the first accommodating cavity. The accommodating cavity can protect the stator 111 , the rotor 112 and the reducer 120 , and prevent the stator 111 , the rotor 112 and the reducer 120 from being damaged by the pollution of the external environment.

In this embodiment, a main bearing 151 is arranged between the support frame 140 and the hub cap 114 , and a planetary carrier support bearing 152 is arranged between the support frame 140 and the planetary carrier 121 . The planet carrier support bearing 152 can better support the support frame 140, and the planet carrier support bearing 152 can support the rotation of the hub 113 and the rotation of the planet carrier 121, so that the structure of the hub motor 10 is more Simple, further reducing the volume and weight of the in-wheel motor 10, by arranging the main bearing 151 and the planet carrier support bearing 152, the wear between the support frame 140 and the hub cap 114 and the planet carrier 121 can also be reduced, and the support frame 140 and the hub can be extended. Service life of cover 114 and planet carrier 121 .

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

In other embodiments, the sun gear 123 and the transfer shaft 160 may be integrally provided, which can make the structure simpler and the occupied space further reduced.

Referring to FIG. 4 together, in this embodiment, a reducer connecting hole 161 is formed at one end of the adapter shaft 160 , and the reducer connecting hole 161 extends along the axial direction of the adapter shaft 160 for connecting with the reducer 120 . In order to connect with the sun gear 123, the brake 130 is sleeved on the other end of the adapter shaft 160, so that the power generated by the rotor 112 can be output through the reducer 120 and the adapter shaft 160, and the brake 130 can pass through the adapter shaft 160 and the reducer. 120 brakes the rotor 112 .

In this embodiment, the in-wheel motor 10 may further include an encoder 170, and the encoder 170 is connected to the high-speed end. Specifically, an encoder connection hole 162 is formed at one end of the adapter shaft 160 away from the reducer connection hole 161 . The encoder connection hole 162 extends along the axial direction of the adapter shaft 160 , and the encoder 170 is connected to the adapter through the encoder connection hole 162 . The shaft 160 is connected, and by arranging the encoder 170 , the control accuracy of the wheel hub 113 can be improved, thereby improving the reliability of the wheel hub motor 10 .

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

In this embodiment, an encoder locking hole 163 may also be formed at one end of the encoder 170 away from the reducer connection hole 161 . extending upward, so that the locking piece (not shown in the figure) can penetrate the encoder locking hole 163 and extend into the encoder connecting hole 162 to act on the part of the encoder 170 in the encoder connecting hole 162, so as to The encoder 170 is locked with the adapter shaft 160 , so that the connection between the encoder 170 and the adapter 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, the in-wheel motor 10 may further include a connecting frame 180, the connecting frame 180 is connected with the supporting frame 140, the connecting frame 180 forms a second accommodating cavity, and the brake 130 is disposed on the connecting frame 180 and is located in the second accommodating cavity Internally, by providing the connecting frame 180, it can not only play a supporting role for the brake 130, but also play a protective role on the brake 130, so as to avoid the damage caused by the pollution of the external environment of the brake 130. The connecting frame 180, the brake 130 and the supporting frame 140 The connection structure of components such as the speed reducer 120 is compact, so that the overall volume of the in-wheel motor 10 is small, and the space occupied is small.

Referring to FIG. 5 together, in this embodiment, the connecting frame 180 includes a connecting frame body 181, a suspension connecting flange 182 and a brake connecting flange 183. The suspension connecting flange 182 is sleeved on the outer side of the connecting frame body 181, For connecting with an external suspension (not shown in the figure), the brake connecting flange 183 is provided at one end of the connecting frame body 181 for connecting with the brake 130, wherein the connecting frame body 181, the suspension connecting flange 182 and The brake connecting flange 183 can be integrally formed, which can make the structure of the connecting frame 180 more stable.

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

In this embodiment, a support groove 184 is formed at one end of the brake connecting flange 183 away from the connecting frame main body 181 , and an adapter shaft support bearing 153 may be provided between the support groove 184 and the adapter shaft 160 , which can support the adapter shaft 160 . It plays a supporting role, making the transfer shaft 160 more stable during rotation, and can reduce the wear between the connecting frame 180 and the connecting shaft 160 , and prolong the service life of the connecting frame 180 and the connecting shaft 160 .

In this embodiment, a second wiring hole 185 and a third wiring hole 186 may be formed on the connecting frame body 181 , and the second wiring hole 185 penetrates the connecting frame body 181 along the axial direction of the connecting frame body 181 for The connection wire of the stator 111 or the rotor 112 is accommodated, and the third wire hole 186 penetrates the connection frame body 181 along the radial direction of the connection frame body 181 and communicates with the second wire wire hole 185 for accommodating the connection wire of the brake 130 , the interference of the connecting wire with other components can be avoided, thereby reducing the wear of the connecting wire and improving the reliability of the in-wheel motor 10 .

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

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 reducer 220 and a brake 230. 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 reducer 220 includes a low-speed end and a high-speed end. The rotation speed of the low-speed end is lower than that of the high-speed end. After being reduced by the reducer 220, it is transmitted to the brake 230, which can reduce the braking torque required by the brake 230, thereby reducing the volume of the brake 230, so that the in-wheel motor 20 can not only achieve the effect of high direct drive control accuracy, but also can Occupying a smaller space, the motion reliability of the drive system can be improved, and the manufacturing difficulty and cost can be reduced.

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

In this embodiment, the projections of the stator 211 , the rotor 212 and the ring encoder 250 on the radial direction of the rotor 212 are all located within the projection of the hub 213 on the radial direction of the rotor 212 , so that the ring encoder 250 can not occupy additional space , so that the structure of the in-wheel motor 20 is more compact and the volume is smaller.

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, and the stator 211, the rotor 212 and the ring encoder 250 are all located in the accommodating cavity. In the cavity, the stator 211 , the rotor 212 and the ring encoder 250 can be protected, and the stator 211 , the rotor 212 and the ring encoder 250 can be prevented from being damaged by the pollution of the external environment.

In this embodiment, the reducer 220 is a planetary reducer. The planetary reducer includes a planet carrier 221 , a planetary gear 222 and a sun gear 223 that mesh with each other. Repeat. The planet carrier 221 is fixedly connected to the central shaft 240 , and the sun gear 223 is connected to the brake 230 .

In this embodiment, the brake 230 may be connected to the reducer 220 through the transfer shaft 231 . Specifically, one end of the adapter shaft 231 is formed with a reducer connection hole (not shown in the figure), the sun gear 223 is fixedly connected to the adapter shaft 231 through the reducer connection hole, and the brake 230 is sleeved on the other side of the adapter shaft 231. One end, so that the brake 230 can brake the rotor 212 through the transfer shaft 231 and the reducer 220 .

8 and 9, in this embodiment, a square first shaft hole 215 is formed on the hub 213, a square second shaft hole (not shown in the figure) is formed on the planet carrier 221, and the central shaft The two ends of the 240 are respectively provided with a square first shaft end 241 and a second shaft end 242, the first shaft hole 215 is matched with the first shaft end 241, and the second shaft hole is matched with the second shaft end 242, which can prevent When the central shaft 240 rotates with the wheel hub 213 , relative sliding occurs with the wheel hub 213 or the planet carrier 221 , thereby improving the reliability of the wheel hub motor 20 .

Referring to FIGS. 10 to 12 together, in this embodiment, a wire routing slot 261 may be formed on the inner wall of the support frame 260 , and the wire routing slot 261 extends along the axial direction of the support frame 260 for accommodating the stator 211 or the rotor. The connecting wire of 212 can prevent the connecting wire from interfering with other components, thereby reducing the wear of the connecting wire and improving the reliability of the in-wheel motor 20 .

In this embodiment, a mounting slot 262 may be further formed on the inner wall of the support frame 260 , and the in-wheel motor 20 may further include an encoder mounting plate 251 , the encoder mounting plate 251 is disposed on the mounting slot 262 , and the encoder mounting plate 251 A first mounting hole 252 and a second mounting hole 253 are formed thereon, the ring encoder 250 is provided with a third mounting hole (not shown in the figure) corresponding to the first mounting hole 252, and the ring encoder 250 passes through the first mounting hole 252 , the third mounting hole and the first fixing member (such as screws, etc.) are fixedly connected with the encoder mounting plate 251, the support frame 260 is provided with a fourth mounting hole (not marked in the figure) corresponding to the second mounting hole 253, 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 (eg, screw, etc.), so that the ring 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 arranged on the inner wall of the support frame 260 , which can further improve the stability of the ring encoder 250 .

13 , in this embodiment, the in-wheel motor 20 may further include a connecting frame 270 , the connecting frame 270 is connected with the supporting frame 260 , the connecting frame 270 is located on the side of the hub cover 214 away from the wheel hub 213 , and the connecting frame 270 is arranged on the There is a suspension connecting flange 271 , and the suspension connecting flange 271 is used for connecting with an external suspension (not shown in the figure), so as to realize the installation of the in-wheel motor 20 .

In this embodiment, the connecting frame 270 is formed with a wiring hole 272 , and the wiring hole 272 penetrates the connecting frame 270 along the axial direction of the connecting frame 270 for accommodating the connecting wires of the stator 211 , the rotor 212 or the ring encoder 250 , the interference of the connecting wire with other components can be avoided, thereby reducing the wear of the connecting wire and improving the reliability of the in-wheel motor 20 .

In this embodiment, the hub motor 20 further includes a ring gear frame 224, the ring gear frame 224 is disposed on the side of the connecting frame 270 away from the hub cover 214, and the inner wall of the ring gear frame 224 is provided with a ring gear (not shown in the figure). ), the planetary carrier 221 is arranged in the ring gear carrier 224 , and the ring gear meshes with the planetary gear 222 , which can make the planetary gear 222 more stable during rotation and improve the reliability of the hub motor 20 .

Referring to FIG. 14 , the vehicle embodiment of the present invention includes a vehicle body 30 and an in-wheel motor 40 . The in-wheel motor 40 is disposed on the vehicle body 30 and is used to drive the vehicle body 30 to move. The structure of the in-wheel motor 40 can be referred to the above-mentioned embodiment of the in-wheel motor, which will not be repeated here.

In this embodiment, the in-wheel motor 40 is provided with a reducer to reduce the output torque of the rotor and then transmit it to the brake, which can reduce the braking torque required by the brake, thereby reducing the volume of the brake, so that the in-wheel motor 40 can realize direct drive. The effect of higher control precision can occupy a smaller space, thereby improving the motion reliability of the drive system and reducing the difficulty and cost of preparation.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims

An in-wheel motor, characterized in that it includes:

stator;

a rotor sleeved outside the stator and capable of rotating relative to the stator;

a wheel hub, which is fixedly sleeved outside the rotor;

a speed reducer, the speed reducer includes a low-speed end and a high-speed end, the rotation speed of the low-speed end is lower than the rotation speed of the high-end end, the low-speed end and the high-speed end, and the low-speed end is connected to the hub;

A brake is connected to 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 in-wheel motor according to claim 1, wherein the reducer is arranged in the stator, and the stator, the rotor and the projection of the reducer on the radial direction of the rotor are all located in the The hub is in the radial projection of the rotor.
The in-wheel motor according to claim 1, wherein the in-wheel motor further comprises an encoder, and the encoder is connected to the high-speed end.
The in-wheel motor according to claim 1, wherein the reducer is a planetary reducer, and the planetary reducer includes a planet carrier, a planetary gear and a sun gear that mesh with each other, and the planetary gear is rotatably arranged on the 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 gear or the high-speed end is connected to the sun gear.
The in-wheel motor according to claim 4, wherein the in-wheel motor further comprises a support frame, the support frame is arranged in the stator, the planet carrier is arranged in the support frame, the support frame A ring gear is arranged on the inner side, and the ring gear meshes with the planetary gear.
The in-wheel motor according to claim 5, wherein the in-wheel motor further comprises a hub cover disposed on one side of the hub, the hub and the hub cover together form a first accommodating cavity, the The stator, the rotor and the reducer are all located in the first accommodating cavity, a main bearing is arranged between the support frame and the hub cover, and a main bearing is arranged between the support frame and the planet carrier Planet carrier support bearing.
The in-wheel motor according to claim 5, characterized in that, the in-wheel motor further comprises a connecting frame, the connecting frame is connected with the supporting frame, the connecting frame forms a second accommodating cavity, and the brake is arranged in the The connecting frame is located in the second accommodating cavity, and the brake is connected with the sun gear through a transfer shaft.
The in-wheel motor according to claim 7, wherein the connection frame comprises a suspension connection flange and a brake connection flange, the brake connection flange is formed with a support groove, and the suspension connection flange is used for In connection with the external suspension, the brake connecting flange is used for connecting with the brake, and an adapter shaft support bearing is arranged between the support groove and the adapter shaft.
The in-wheel motor according to claim 3, wherein a reducer connection hole is formed at one end of the adapter shaft, and the reducer connection hole extends along the axial direction of the adapter shaft for connecting with the adapter shaft. Reducer connection, the brake is sleeved on the other end of the transfer shaft, and the other end of the transfer shaft is formed with an encoder connection hole, and the encoder connection hole is along the axial direction of the transfer shaft extension for connecting with the encoder.
The in-wheel motor according to claim 1, wherein the in-wheel motor further comprises a center shaft, a ring encoder sleeved outside the center shaft, and a support frame sleeved outside the ring encoder, the The stator is sleeved outside the support frame, one end of the central shaft is connected to the hub, and the other end of the central shaft is connected to the low-speed end.
The in-wheel motor according to claim 10, wherein a square first shaft hole is formed on the wheel hub, a square second shaft hole is formed on the planet carrier of the reducer, and two shaft holes of the central shaft are formed. The ends are respectively provided with a square first shaft end and a second shaft end, the first shaft hole is matched with the first shaft end, and the second shaft hole is matched with the second shaft end.
A vehicle is characterized by 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 is used to drive the vehicle body to move.