CN214324874U - Drive axle with in-wheel motor - Google Patents

Abstract

The utility model discloses a drive axle with a wheel hub motor, which relates to the technical field of drive systems and comprises a drive axle body and wheels, wherein the drive axle body comprises an axle housing, the wheels comprise a first wheel and a second wheel, and the first wheel and the second wheel are respectively rotatably arranged at two ends of the axle housing; a wheel hub motor and a speed reducer are installed in the first wheel, and a brake is installed on the second wheel; the hub motor is arranged on the axle housing, connected with the first wheel and used for driving the first wheel to rotate; the hub motor is connected with a power supply through an electric wire and used for supplying power to the hub motor; the axle housing is close to and still rotates in one side of first wheel and installs the semi-axis, and the one end of semi-axis is used for being connected with the engine, and the other end passes the axle housing and is connected with the reduction gear, and the reduction gear is connected with first wheel for drive first wheel rotates. The utility model discloses can carry out energy recuperation through control motor and utilize, can reduce fuel consumption.

Description

Drive axle with in-wheel motor

Technical Field

The utility model relates to a driving system technical field especially relates to a transaxle with in-wheel motor.

Background

With the development of electric automobile technology and the application of hub motors, it has become a considerable development direction of trucks to drive trucks by using hub motors as power sources, and in current trucks adopting pure electric vehicles, the motors transmit power to a drive axle through a transmission shaft, and the power has a large amount of energy loss in the mechanical transmission process, so that the endurance mileage is affected. Therefore, the in-wheel motor drive axle is adopted to directly drive the vehicle, so that the energy loss can be reduced, and the endurance mileage of the truck can be improved. The axle with the hub motor drive can form a multi-shaft driven pure electric vehicle and a multi-shaft driven hybrid vehicle, and is more beneficial to the realization of the unmanned technology.

Compared with the traditional driving system scheme, the hub motor driving fundamentally changes the power transmission structure, partial transmission parts are omitted, the transmission efficiency and the energy recycling are improved, the oil consumption can be reduced due to the assistance of the motor under the working conditions of starting, accelerating and the like, and the braking energy can be recycled in the process.

The patent "an electronic wheel assembly, axle and vehicle suitable for double-tire and dress wheel" (patent number: CN109130839A) provides the technical scheme for with wheel hub motor and stopper integration inside inboard wheel hub, its shortcoming is that install motor, stopper and reduction gear simultaneously in limited space, can lead to the space that the motor takes up to reduce the output that influences the motor on the one hand, on the other hand can lead to easily generating heat and radiating effect is poor, very easily reduces the life of in-wheel motor and stopper etc.. Meanwhile, the speed reducer is also arranged in the inner wheel in order to be matched with the hub motor, so that the limited space of the inner wheel is occupied, the applied axle is greatly changed, and the research and development cost is increased.

The patent of 'an in-wheel motor integrated system' (patent number: 108749556A) is characterized in that an in-wheel motor, a braking device and a speed reducing mechanism are distributed in hubs on the inner side and the outer side, but a speed reducer and a brake are arranged in wheels on the outer side in the technical scheme, so that the original axle and chassis structure of a truck is greatly changed.

Therefore, it is desirable to develop a new driving axle with an in-wheel motor to solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a transaxle with in-wheel motor to solve the above-mentioned problem that prior art exists, can carry out energy recuperation through the control motor and utilize, can reduce fuel consumption.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a drive axle with in-wheel motor, including drive axle body and wheel, the drive axle body includes the axle housing, the wheel includes first wheel and second wheel, first wheel and the second wheel respectively rotate and install in the both ends of axle housing; a wheel hub motor and a speed reducer are installed in the first wheel, and a brake is installed on the second wheel; the hub motor is mounted on the axle housing, and is connected with the first wheel and used for driving the first wheel to rotate; the hub motor is connected with a power supply through a wire and used for supplying power to the hub motor; the axle housing is close to it installs the semi-axis still to rotate in one side of first wheel, the one end of semi-axis is used for being connected with the engine, and the other end passes the axle housing with retarder connection, the reduction gear with first wheel is connected, is used for driving first wheel rotates.

Preferably, the hub motor comprises a sleeve, a stator core, a magnet, an outer rotor shell and a motor end cover; the inner side of the sleeve is provided with a middle wheel side shell, and the inner side of the sleeve is connected with the outer side of the middle wheel side shell through a flat key; the inner side of the middle wheel side shell is fixedly connected with the axle housing through a flange; the stator core is sleeved on the outer side of the sleeve, the magnet is installed on the outer side of the stator core to form a rotor part, the outer rotor shell is sleeved on the outer side of the rotor part, and an air gap is reserved between the outer rotor shell and the rotor part; the motor end cover is fixed at the outer end of the outer rotor shell.

Preferably, the motor end cover further comprises an end wheel side shell and an inner wheel side shell, wherein the end wheel side shell is fixed on the inner side of the motor end cover and is used for being connected with the speed reducer; the inner wheel side shell is arranged in the outer rotor shell, the end part of the inner wheel side shell is fixedly connected with the inner end of the outer rotor shell, and the inner wheel side shell is fixedly connected with the wheel; the end wheel side shell and the inner wheel side shell are respectively sleeved at two ends of the middle wheel side shell, and a sealing piece is arranged at the sleeved position.

Preferably, the speed reducer is a planetary gear speed reducer and comprises a sun gear, a planet gear, a gear ring and a planet gear rack; the planet disk rack is fixed on the inner side of the end wheel side shell through bolts; an installation groove is formed in one side, away from the end wheel side shell, of the planetary plate frame, a plurality of installation parts are arranged in the installation groove, and each installation part is provided with one planetary wheel; the inner side of the planet gear is meshed with the sun gear, the outer side of the planet gear is meshed with the gear ring, the sun gear is installed on the half shaft, and the gear ring is fixedly connected with the second flange.

Preferably, the hub motor comprises a sleeve, a stator core, a magnet, a rotor yoke and a motor housing; the stator core is sleeved outside the sleeve, and the inner side of the sleeve is fixedly connected with the axle housing through a flange; the magnet is sleeved on the outer side of the stator core, and the magnet is fixed on the inner side of the motor shell through the rotor magnetic yoke.

Preferably, the speed reducer is a planetary gear speed reducer and comprises a sun gear, a planet gear, a gear ring and a planet gear rack; the outer edge of the planetary plate frame is connected with the motor shell through a bolt; an installation part is arranged on one side, far away from the motor shell, of the planetary wheel frame, and the planetary wheel is sleeved on the installation part; the inner side of the planet gear is meshed with the sun gear, the outer side of the planet gear is meshed with the gear ring, the sun gear is installed on the half shaft, and the gear ring is fixedly connected with the wheel.

Preferably, a wheel side shell is further arranged in the first wheel, the wheel side shell comprises a left wheel side shell and a right wheel side shell which are mutually connected, the left end of the right wheel side shell is connected with the left wheel side shell, and the right end of the right wheel side shell is connected with the first wheel; the right side wheel limit shell with be formed with the cavity in the left side wheel limit shell, in-wheel motor and the reduction gear all install in the cavity, the ring gear of reduction gear is fixed in on the left side wheel limit shell.

Preferably, the planetary gear reducer adopts a two-stage planetary gear reducer to perform two-stage speed reduction.

Preferably, the wheel comprises a hub, the hub is connected with a bearing connecting piece, the bearing connecting piece is rotatably mounted on the axle housing through a bearing, and a tire is mounted on the outer side of the hub;

one of the first wheel and the second wheel is mounted;

or the first wheel and the second wheel are both provided with two wheels, and the hub motor and the speed reducer are both arranged in the hub of the first wheel on the outer side; the brake is mounted on the second wheel on the inner side.

Preferably, the drive axle body adopts a through drive axle or a drive axle with an independent suspension;

a groove is formed in the outer side of the axle housing of the drive axle body and used for enabling the electric wire to supply power to the hub motor; the two flanges comprise a first flange and a second flange which are arranged from inside to outside in a back-to-back mode, and a gap is formed between the first flange and the second flange and used for enabling the electric wire to pass through; the first flange and the second flange are fixed on the axle housing through bolts.

The utility model discloses following beneficial technological effect has been gained for prior art:

1. the utility model relates to an in-wheel motor drive axle can increase in-wheel motor with current axle, forms pure electronic or hybrid drive axle, can increase the electric drive mode for the vehicle.

2. The vehicle using the drive axle can increase the insufficiency of the torque of the internal combustion engine by using the torque of the in-wheel motor when the vehicle has a large torque demand; when braking, the electromagnetic braking force of the hub motor is utilized to assist the friction braking to work, and the service life of the friction braking is prolonged.

3. The utility model relates to a wheel hub motor and actuating system thereof need not change the chassis structure of existing truck.

4. The utility model discloses in the transaxle that relates can adopt through drive axle also can adopt independent suspension type drive axle.

5. The utility model discloses the motor that the transaxle described adopted both can adopt direct drive formula in-wheel motor, can also adopt drive reduction gear formula in-wheel motor, and cheap and easily installation, application scope is wider.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 shows a drive axle with a hub motor according to the present invention;

FIG. 2 is a cross-sectional view of an in-wheel motor according to an embodiment;

FIG. 3 is an exploded view of an in-wheel motor according to an embodiment;

FIG. 4 is a front view of the axle housing of the present invention;

FIG. 5 is a top view of the axle housing of the present invention;

FIG. 6 is an isometric view of an in-wheel motor according to an embodiment;

FIG. 7 is a front cross-sectional view of a hub motor according to an embodiment;

fig. 8 is a three-dimensional schematic view of a second flange of the present invention;

fig. 9 is a cross-sectional view of a second flange of the present invention;

FIG. 10 is a three-dimensional schematic view of an end wheel housing of an embodiment;

FIG. 11 is a cross-sectional view of an end wheel housing of an embodiment;

FIG. 12 is a three-dimensional schematic view of a mid-wheel rim shell according to an embodiment;

FIG. 13 is a cross-sectional view of a mid-wheel rim shell according to an embodiment;

FIG. 14 is a three-dimensional schematic view of an inner wheel rim shell according to an embodiment;

FIG. 15 is a cross-sectional view of an inner wheel rim shell according to one embodiment;

FIG. 16 is a three-dimensional schematic view of a sleeve according to an embodiment;

FIG. 17 is a cross-sectional view of a sleeve according to an embodiment;

FIG. 18 is a cross-sectional view of a second in-wheel motor according to an embodiment;

FIG. 19 is an exploded view of a second in-wheel motor according to an embodiment;

FIG. 20 is a schematic structural view of a right wheel side shell of the second embodiment;

FIG. 21 is a cross-sectional view of a right wheel side shell of the second embodiment;

FIG. 22 is a schematic structural view of a left wheel side shell of the second embodiment;

FIG. 23 is a cross-sectional view of a left wheel side shell of the second embodiment;

FIG. 24 is a schematic structural view of a second planetary plate carrier of the embodiment;

FIG. 25 is a cross-sectional view of a second planetary plate carrier of the embodiment;

FIG. 26 is a schematic structural view of a second sleeve according to an embodiment;

FIG. 27 is a cross-sectional view of a sleeve according to a second embodiment;

in the figure, an axle housing 01, a half axle 02, a first flange 03, a second flange 04, a first bearing 05, a second bearing 06, a third bearing 07, a bearing connecting piece 08, a planetary gear reducer 1, a sun gear 11, a planet gear 12, a ring gear 13, a planet carrier 14, a hub motor 2, a sleeve 21, a stator core 22, a magnet 23, a rotor yoke 24, a motor housing 25, an outer rotor housing 204, a motor end cover 205, a wheel side housing 3, a right wheel side housing 31, a left wheel side housing 32, an end wheel side housing 301, a middle wheel side housing 302, an inner wheel side housing 303, a first hub 41, a second hub 42, a first tire 43, a second tire 44, a hub 401, a tire 402, a first sealing piece 51 and a second sealing piece 52.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Example one

As shown in fig. 1 to 17, the present embodiment provides a drive axle with an in-wheel motor, which can be used for a hybrid or pure electric truck, a bus, an engineering vehicle, etc., and comprises a drive axle body and wheels, wherein the drive axle body comprises an axle housing 01, the wheels comprise a first wheel and a second wheel, and the first wheel and the second wheel are respectively rotatably mounted at two ends of the axle housing 01; a wheel hub motor 2 and a speed reducer are installed in the first wheel, and a brake is installed on the second wheel; the hub motor 2 is arranged on the axle housing 01, and the hub motor 2 is connected with the first wheel and used for driving the first wheel to rotate; the hub motor 2 is connected with a power supply through an electric wire and used for supplying power to the hub motor 2; first wheel rotates and installs on the axle housing, and axle housing 01 is located the middle part of wheel, and axle housing 01 still rotates in one side that is close to first wheel and installs semi-axis 02, and the one end of semi-axis 02 is used for being connected with the engine, and the other end passes axle housing 01 and retarder connection, and the retarder is connected with first wheel, is used for driving first wheel rotates.

Further, a half shaft 02 is also rotatably mounted in one side of the axle housing 01 close to the second wheel to drive the second wheel to rotate.

In the present embodiment, the drive axle may form a through drive axle, and may also be applied to a drive axle having an independent suspension; the brake may be a drum brake or a disc brake.

In the present embodiment, the in-wheel motor includes a sleeve 21, a stator core 22, a magnet 23, an outer rotor case 204, and a motor end cover 205; the stator core 22 is connected with the axle housing 01 through a sleeve 21, a middle wheel side shell 302, a first flange 03 and a second flange 04 to realize fixation, specifically, the middle wheel side shell 302 is installed on the inner side of the sleeve 21, key grooves are correspondingly turned on the inner side of the sleeve 21 and the outer side of the middle wheel side shell 302, and the two are connected in a flat key mode; the inner side of the middle wheel side shell 302 is fixedly connected with the axle housing 01 through a flange; the stator core 22 is fitted outside the sleeve 21. The magnets 23 are mounted on the outer side of the stator core 22 to form a rotor part, specifically, the magnets 23 are fixed inside the grooves on the outer side of the stator core 22 through fiber materials and resin, the rotor part formed by the stator core 22 and the magnets 23 is sleeved with the outer rotor shell 204, and an air gap of 1 mm to 3 mm is left between the rotor part and the outer rotor shell 204. The motor end cover 205 is fixed to an outer end (an end facing the outer side of the wheel) of the outer rotor shell 204 through a bolt, specifically, a bolt hole is formed in an edge (a position far away from the center of a circle) of the motor end cover 205, a bolt hole is correspondingly formed in an end face of the outer end of the outer rotor shell 204, and the bolt hole penetrate through the bolt hole through a bolt to achieve fixed connection.

In the embodiment, two flanges are provided, including a first flange 03 and a second flange 04 which are arranged from inside to outside and are back to back, the second flange 04 is located at one side close to the outer side of the wheel, and a gap is provided between the first flange 03 and the second flange 04 for passing an electric wire; key grooves are correspondingly turned on the inner side of the middle wheel side shell 302 and the outer sides of the first flange 03 and the second flange 04, and the middle wheel side shell 302 is connected with the first flange 03 and the second flange 04 through flat keys; first flange 03 and second flange 04 all bore radial screw hole, are fixed in on the axle housing 01 through the bolt.

In the embodiment, grooves are formed in the outer side of the axle housing 01, so that electric wires enter the hub motor through the gap between the first flange 03 and the second flange 04 along the grooves of the axle housing 01 and enter the wire harness winding on the stator core 22 of the hub motor to be electrified.

In this embodiment, the motor end cover further comprises a wheel side shell, the wheel side shell comprises an end wheel side shell 301, an inner wheel side shell 303 and a middle wheel side shell 302, the end wheel side shell 301 is fixed on the inner side of the motor end cover 205 and is used for connecting a speed reducer, specifically, a threaded hole is formed in the middle (close to the circle center) of the motor end cover and is connected with the end wheel side shell 301 in a bolt manner; the inner wheel side shell 303 is cylindrical and is mounted in the outer rotor shell 204, an annular mounting plate is arranged at one end, facing the inner side of the wheel, of the inner wheel side shell, threaded holes are formed in the mounting plate, axial threaded holes are correspondingly formed in the end face of the inner end of the outer rotor shell 204 and are used for being in bolted connection with the inner wheel side shell 303, and the inner wheel side shell 303 is fixedly connected with the wheel.

Further, in order to ensure that the end wheel side shell 301 and the inner wheel side shell 303 rotate relative to the middle wheel side shell 302, the end wheel side shell 301 and the inner wheel side shell 303 are sleeved on two end part ring sleeves of the middle wheel side shell 302, the first sealing element 51 and the second sealing element 52 are respectively arranged at the positions of the ring sleeves, non-contact connection is achieved, and the first sealing element 51 and the second sealing element 52 can be used for selecting common sealing rings from the market according to needs.

In this embodiment, the wheel includes a hub 401, and the hub motor and the speed reducer are both mounted in the hub 401; the wheel hub 401 is connected with a bearing connecting piece 08, the bearing connecting piece 08 is rotatably mounted on the axle housing 01 through a bearing, the inner wheel side shell 303 is sleeved on the left side (the side close to the wheel hub motor) of the bearing connecting piece 08, the outer rotor shell 204, the inner wheel side shell 303, the wheel hub 401 and the bearing connecting piece 08 are connected together through the same group of bolts, and the wheel is directly driven by the outer rotor shell 204 after the wheel hub motor is electrified. A bearing attachment 08 is wound around the axle case 01 via the second bearing 06 and the first bearing 05, the bearing attachment 08 functions to support the outer rotor case 204, the inner hub case 303, and the hub 401 connected thereto, and the tire 402 is mounted on the outer side of the hub 401.

In this embodiment, two first wheels and two second wheels are installed, and the hub motor 2 and the speed reducer are installed in the hub 401 of the first wheel on the outer side; the brake is arranged on the second wheel on the inner side; wherein, the installation of inboard wheel hub and outside wheel hub adopts the anti-dress mode.

In the present embodiment, the axle shaft 02 is rotatably mounted in the axle housing 01 through a third bearing 07, so as to realize power transmission.

In this embodiment, the speed reducer is a planetary gear speed reducer, and the planetary gear speed reducer is a speed and torque conversion device composed of a sun gear 11, a planet gear 12 and a ring gear 13, and realizes speed reduction through different gear ratios, and comprises the sun gear 11, the planet gear 12, the ring gear 13 and a planet carrier 14; the outer ring of the planet disc rack 14 is provided with a threaded hole, the end wheel side shell 301 is correspondingly provided with a threaded hole, the planet disc rack 14 is fixed on the inner side of the end wheel side shell 301 through a bolt, the end wheel side shell 301 is in bolt connection with the motor end cover 205, and the motor end cover 205 is in bolt connection with the outer rotor shell 204, so that the planet disc rack 14 is fixedly connected with the outer rotor shell of the motor; a mounting groove is formed in one side, away from the end wheel side shell 301, of the planetary wheel frame 14, a plurality of cylindrical mounting portions are arranged in the mounting groove, a planetary wheel 12 is mounted on each mounting portion, the inner side of each planetary wheel 12 is meshed with the sun wheel 11, and the outer side of each planetary wheel 12 is meshed with the gear ring 13; specifically, the sun gear 11 is mounted on the half shaft 02 and fixedly connected with the half shaft 02 through a flat key, gear teeth are arranged on an inner ring of the gear ring 13, the gear ring 13 is located on one surface, facing the outer side of the wheel, of the second flange 04, a threaded hole is formed in the gear ring 13, and the gear ring is fixedly connected with the second flange 04 in a bolt mode to realize fixation; at this time, the ring gear 13 is sleeved on the sun gear 11, a plurality of planet gears 12 are installed between the sun gear 11 and the sun gear, and the three are meshed and connected.

The utility model discloses an operating mode divide into three kinds:

1. the engine is driven. The power from the engine is transmitted into the planetary gear reducer through the half shaft to reduce speed and increase torque, and the power after reducing speed and increasing torque is transmitted to the wheel hub through the planetary plate frame, the end wheel side shell, the motor end cover and the motor outer rotor in the planetary gear reducer to drive the tire to rotate. In the working mode, when braking is performed, the rotating speed of the stator magnetic field is controlled to be lower than the corresponding rotating speed of the wheels, so that the rotor magnetic field cuts the stator magnetic field, electromagnetic braking is realized, and braking energy recovery is achieved.

2. And (4) pure electric drive. Under the working mode, the hub motor generates a magnetic field through a copper wire placed on the stator core, the outer rotor shell of the motor is driven to rotate, and power is directly transmitted to the hub to drive the tire to rotate. In the working mode, when braking is performed, the rotating speed of the stator magnetic field is controlled to be lower than the corresponding rotating speed of the wheels, so that the rotor magnetic field cuts the stator magnetic field, electromagnetic braking is realized, and braking energy recovery is achieved.

3. And (4) hybrid power driving. When the tire is in the working mode, after the power from the engine is subjected to speed reduction and torque increase, the torque is further increased by the hub motor and is transmitted to the hub to drive the tire to rotate.

Example two

The embodiment is an improvement on the basis of the first embodiment, and the improvement is as follows: as shown in fig. 18-27, one is mounted to each of the first wheel and the second wheel.

In the embodiment, the hub motor 2 and the speed reducer are both arranged in a first wheel, and the axle housing 01 is positioned in the middle of the wheel; the hub motor 2 is arranged on the axle housing 01, the hub motor 2 is connected with the speed reducer, and a groove is formed in the outer side of the axle housing 01 and used for enabling an electric wire to supply power to the hub motor 2; the wheels are rotatably mounted on the axle housing 01, and the speed reducer is connected with the first wheel and used for driving the first wheel to rotate; a half shaft 02 is rotatably arranged in the axle housing 01, one end of the half shaft 02 is used for being connected with an engine, and the other end of the half shaft 02 penetrates through the axle housing 01 to be connected with a speed reducer.

In the present embodiment, the in-wheel motor includes a sleeve 21, a stator core 22, a magnet 23, a rotor yoke 24, and a motor case 25; the stator core 22 is sleeved outside the sleeve 21, and the inner side of the sleeve 21 is fixedly connected with the axle housing 01 through a flange; the magnet 23 is fitted to the outside of the stator core 22, and the magnet 23 is fixed to the inside of the motor case 25 via the rotor yoke 24.

In this embodiment, two flanges are provided, including a first flange 03 and a second flange 04 which are arranged back to back, and a gap is provided between the first flange and the second flange for allowing an electric wire to pass through, so that the electric wire enters the hub motor through the gap between the first flange 03 and the second flange 04 and is electrified along the groove of the axle housing 01; key grooves are correspondingly turned on the inner side of the sleeve 21 and the outer sides of the first flange 03 and the second flange 04, and the sleeve 21 is connected with the first flange 03 and the second flange 04 through flat keys arranged in the key grooves; the first flange 03, the second flange 04 and the axle housing 01 are correspondingly provided with threaded holes, and the first flange 03 and the second flange 04 are fixedly installed on the axle housing 01 through bolts.

In the present embodiment, the magnet 23 is fixed inside the groove of the rotor yoke 24 by a fiber material and resin, and the rotor yoke 24 is fixed inside the motor case 25 by a positioning groove and a bolt.

In this embodiment, the speed reducer is a planetary gear speed reducer, and includes a sun gear 11, a planet gear 12, a ring gear 13 and a planet carrier 14, and the speed reducer is realized by using a rotating speed and torque conversion device composed of the sun gear 11, the planet gear 12 and the ring gear 13 and by using different gear ratios; threaded holes are correspondingly formed in the outer edge of the planetary plate frame 14 and the outer side of the motor shell 25, and the motor shell 25 is connected with the planetary plate frame 14 through bolts to transmit power to the planetary gear reducer; a cylindrical mounting part is arranged on one side of the planet wheel rack 14 away from the motor shell 25, and the planet wheel 12 is sleeved on the mounting part; the inner side of the planet wheel 12 is meshed with a sun wheel 11, the outer side of the planet wheel is meshed with a gear ring 13, the sun wheel 11 is arranged on a half shaft, and the gear ring 13 is fixedly connected with a left wheel side shell 32 of the wheel so as to drive the wheel to rotate; the sun gear is fixedly connected with the half shaft through a flat key, and the half shaft 02 is sleeved in the axle housing 01 through a third bearing 07 to rotate, so that the power of an engine is transmitted into the planetary gear reducer.

In this embodiment, the wheel includes a first hub 41 and a second hub 42, a bearing connecting member 08 is connected between the first hub 41 and the second hub 42, and the bearing connecting member is rotatably mounted on the axle housing through a bearing, wherein two bearings are provided, and include a first bearing 05 and a second bearing 06 which are arranged in parallel, and the first bearing 05 and the second bearing 06 are sleeved on the axle housing 01; the first and second hubs 41 and 42 are provided with first and second tires 43 and 44, respectively.

In the present embodiment, a wheel rim shell is further disposed in the first wheel hub 41, and the wheel rim shell includes a right wheel rim shell 31 and a left wheel rim shell 32 which are connected with each other; the cavity is formed in the right wheel side shell 31 and the left wheel side shell 32, the hub motor and the speed reducer are both installed in the cavity, and the gear ring 13 of the speed reducer is fixed on the left wheel side shell 32. The left wheel side shell 32 is provided with two groups of threaded holes, the inner threaded holes are connected with the gear ring 13 in a bolt mode, and the outer threaded holes are connected with the right wheel side shell 31 in a bolt mode; the right wheel side shell 31 is provided with two groups of threaded holes, the left end threaded hole is connected with the left wheel side shell 32 in a bolt mode, and the right end threaded hole is connected with the first hub 41 in a bolt mode; the power after being reduced by the planetary gear reducer is transmitted to the wheels.

The utility model discloses an operating mode divide into three kinds:

1. driving an engine: the power from the engine is transmitted into the planetary gear reducer through the half shaft to reduce the speed and increase the torque, and the power after reducing the speed and increasing the torque drives the tire to rotate through the planetary gear reducer; in the working mode, when braking is performed, the rotating speed of the stator magnetic field is controlled to be lower than the corresponding rotating speed of the wheels, so that the rotor magnetic field cuts the stator magnetic field, electromagnetic braking is realized, and braking energy recovery is achieved.

2. Pure electric drive: in the working mode, the hub motor generates a magnetic field through a copper wire placed on a stator core, drives an outer rotor (a magnet, a rotor magnetic yoke and a motor shell) of the motor to rotate, and transmits power to a hub through a speed reducer to drive a tire to rotate; in the working mode, when braking is performed, the rotating speed of the stator magnetic field is controlled to be lower than the corresponding rotating speed of the wheels, so that the rotor magnetic field cuts the stator magnetic field, electromagnetic braking is realized, and braking energy recovery is achieved.

3. Hybrid power drive: when the tire is in the working mode, after the power from the engine is subjected to speed reduction and torque increase, the torque is further increased by the hub motor and is transmitted to the hub to drive the tire to rotate.

EXAMPLE III

The embodiment is an improvement on the basis of the first embodiment and the second embodiment, and the improvement is as follows: the planetary gear reducer 1 adopts a two-stage planetary gear reducer to carry out two-stage speed reduction; specifically, the sun gear 11, the planet gear 12, the ring gear 13 and the planet carrier 14 are provided in two sets, and the sun gear 11 of the second stage planet gear is mounted on the planet carrier 14 of the first stage planet gear;

in the first embodiment, after the half shaft 02 drives the planet disk rack 14 of the first-stage planet gear, the sun gear 11 of the second-stage planet gear is continuously driven, so that two-stage speed reduction is realized; the planet disk rack 14 of the second-stage planet gear is fixedly connected with the end wheel side shell 301 through bolts

In the second embodiment, after the motor housing 25 drives the planet disk rack 14 of the first-stage planet gear, the sun gear of the second-stage planet gear is continuously driven, so that two-stage speed reduction is realized; the planetary plate carrier of the second stage planetary gear is fixedly connected with the motor housing 25 through bolts.

Further, the planetary gear reducer 1 may also be provided with multiple stages as needed.

It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. A transaxle with in-wheel motor which characterized in that: the wheel-mounted type automobile axle comprises a drive axle body and wheels, wherein the drive axle body comprises an axle housing, the wheels comprise a first wheel and a second wheel, and the first wheel and the second wheel are respectively rotatably mounted at two ends of the axle housing; a wheel hub motor and a speed reducer are installed in the first wheel, and a brake is installed on the second wheel; the hub motor is mounted on the axle housing, and is connected with the first wheel and used for driving the first wheel to rotate; the hub motor is connected with a power supply through a wire and used for supplying power to the hub motor; the axle housing is close to it installs the semi-axis still to rotate in one side of first wheel, the one end of semi-axis is used for being connected with the engine, and the other end passes the axle housing with retarder connection, the reduction gear with first wheel is connected, is used for driving first wheel rotates.

2. The transaxle having an in-wheel motor of claim 1 wherein: the hub motor comprises a sleeve, a stator core, a magnet, an outer rotor shell and a motor end cover; the inner side of the sleeve is provided with a middle wheel side shell, and the inner side of the sleeve is connected with the outer side of the middle wheel side shell through a flat key; the inner side of the middle wheel side shell is fixedly connected with the axle housing through a flange; the stator core is sleeved on the outer side of the sleeve, the magnet is installed on the outer side of the stator core to form a rotor part, the outer rotor shell is sleeved on the outer side of the rotor part, and an air gap is reserved between the outer rotor shell and the rotor part; the motor end cover is fixed at the outer end of the outer rotor shell.

3. The transaxle having an in-wheel motor of claim 2 wherein: the end wheel side shell is fixed on the inner side of the motor end cover and is used for being connected with the speed reducer; the inner wheel side shell is arranged in the outer rotor shell, the end part of the inner wheel side shell is fixedly connected with the inner end of the outer rotor shell, and the inner wheel side shell is fixedly connected with the wheel; the end wheel side shell and the inner wheel side shell are respectively sleeved at two ends of the middle wheel side shell, and a sealing piece is arranged at the sleeved position.

4. The transaxle having an in-wheel motor of claim 3 wherein: the speed reducer is a planetary gear speed reducer and comprises a sun gear, a planet gear, a gear ring and a planet gear plate rack; the planet disk rack is fixed on the inner side of the end wheel side shell through bolts; an installation groove is formed in one side, away from the end wheel side shell, of the planetary plate frame, a plurality of installation parts are arranged in the installation groove, and each installation part is provided with one planetary wheel; the inner side of the planet gear is meshed with the sun gear, the outer side of the planet gear is meshed with the gear ring, the sun gear is installed on the half shaft, and the gear ring is fixedly connected with the flange.

5. The transaxle having an in-wheel motor of claim 1 wherein: the hub motor comprises a sleeve, a stator core, a magnet, a rotor magnetic yoke and a motor shell; the stator core is sleeved outside the sleeve, and the inner side of the sleeve is fixedly connected with the axle housing through a flange; the magnet is sleeved on the outer side of the stator core, and the magnet is fixed on the inner side of the motor shell through the rotor magnetic yoke.

6. The transaxle having an in-wheel motor of claim 5 wherein: the speed reducer is a planetary gear speed reducer and comprises a sun gear, a planet gear, a gear ring and a planet gear plate rack; the outer edge of the planetary plate frame is connected with the motor shell through a bolt; an installation part is arranged on one side, far away from the motor shell, of the planetary wheel frame, and the planetary wheel is sleeved on the installation part; the inner side of the planet gear is meshed with the sun gear, the outer side of the planet gear is meshed with the gear ring, the sun gear is installed on the half shaft, and the gear ring is fixedly connected with the wheel.

7. The transaxle having an in-wheel motor of claim 6 wherein: a wheel side shell is further arranged in the first wheel and comprises a left wheel side shell and a right wheel side shell which are mutually connected, the left end of the right wheel side shell is connected with the left wheel side shell, and the right end of the right wheel side shell is connected with the first wheel; the right side wheel limit shell with be formed with the cavity in the left side wheel limit shell, in-wheel motor and the reduction gear all install in the cavity, the ring gear of reduction gear is fixed in on the left side wheel limit shell.

8. The transaxle having an in-wheel motor of claim 4 or 7 wherein: the planetary gear reducer adopts a two-stage planetary gear reducer to carry out two-stage speed reduction.

9. The transaxle having an in-wheel motor of claim 4 or 7 wherein: the wheel comprises a wheel hub, the wheel hub is connected with a bearing connecting piece, the bearing connecting piece is rotatably arranged on the axle housing through a bearing, and a tire is arranged on the outer side of the wheel hub;

one of the first wheel and the second wheel is mounted;

or the first wheel and the second wheel are both provided with two wheels, and the hub motor and the speed reducer are both arranged in the hub of the first wheel on the outer side; the brake is mounted on the second wheel on the inner side.

10. The transaxle having an in-wheel motor of claim 4 or 7 wherein: the drive axle body adopts a through drive axle or a drive axle with an independent suspension;

a groove is formed in the outer side of the axle housing of the drive axle body and used for enabling the electric wire to supply power to the hub motor; the two flanges comprise a first flange and a second flange which are arranged from inside to outside in a back-to-back mode, and a gap is formed between the first flange and the second flange and used for enabling the electric wire to pass through; the first flange and the second flange are fixed on the axle housing through bolts.

Images