CN111799983A

CN111799983A - Motor car wheel hub motor and assembly method thereof

Info

Publication number: CN111799983A
Application number: CN202010661730.1A
Authority: CN
Inventors: 李军
Original assignee: Ziyang Sunfull Mechanical & Electrical Co ltd
Current assignee: Ziyang Sunfull Mechanical & Electrical Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-10-20

Abstract

The invention relates to the technical field of wheel hub motors, in particular to a wheel hub motor of a bullet train and an assembling method thereof, which are used for solving the problem that the motor cannot normally work because the thickness of an axial air gap between a stator and a rotor of the motor is changed when a train vibrates in the prior art. The invention comprises a motor supporting shaft and a magnetic suspension bearing mechanism, wherein a gap regulating and controlling assembly and a stator disc are also arranged on the motor supporting shaft, a rotor disc is arranged on the outer peripheral surface of the magnetic suspension bearing mechanism, an air gap regulating assembly which is in contact with the stator disc is arranged on the rotor disc, the rotor disc is connected with a bullet train wheel core through a rotor shell, and the bullet train wheel core is connected with a wheel hub. The air gap adjusting assembly and the gap adjusting and controlling assembly can adjust and supplement the displacement between the rotor disc and the stator disc, so that the axial air gap thickness of the rotor disc and the axial air gap thickness of the stator disc are not changed, and the motor can normally work.

Description

Motor car wheel hub motor and assembly method thereof

Technical Field

The invention relates to the technical field of wheel hub motors, in particular to a wheel hub motor of a bullet train and an assembling method thereof.

Background

At present, urban rail trains at home and abroad are powered by a direct-current power grid, and a driving mode of a motor train unit is that a direct-current brush motor is mostly hung on a vehicle bogie, and torque sent by the motor can be transmitted to wheels through a support of a wheel set axle and a reduction gear pair, so that the running of the train is realized. In order to ensure the stable running of the train and reduce the vibration, a spring system mechanism is arranged between a bogie of a running part of the train and a wheel rotating part, and the traditional driving mode has the advantages that the brush direct current motor has huge volume and weight which cannot be reduced, and in addition, the efficiency loss of a reduction gear pair is caused, so that people hope that a hub motor capable of directly driving wheels appears.

In the prior art, the rapid development of the rare earth permanent magnet brushless direct current motor can design and manufacture a high-power hub motor for a vehicle. In order to achieve the purposes of directly driving a driving wheel by large torque and improving the running speed, running safety and running stability of a train, experts in the industry propose that unsprung weight of the train is reduced as much as possible to eliminate the limitation of the excessive weight of a rotating part on the improvement of the running speed of the train, and most of the weight of a hub motor can be preferably transferred and installed on a bogie. For such requirements, after the motors are all transferred and mounted on the bogie, a speed reducing mechanism with a large speed reducing ratio is needed to be adopted to transmit the torque of the motors to wheels, so that the original motor car driving mode of the train is returned, and all advantages of the hub motors are lost.

The hub motor is adopted, the rotor component of the motor is directly connected with the wheel to transmit large torque, the stator of the motor is arranged on a train bogie in a contract way with all the fixed components, the vibration inevitably generated during the running of the train forces the stator and the rotor of the motor to mutually displace, and the air gap of the motor depending on the work is greatly changed, so that the motor can not normally work. Therefore, there is an urgent need for a hub motor in which the thickness of the axial air gap between the stator and the rotor of the motor is not changed when the train vibrates, so that the motor can normally operate.

Disclosure of Invention

Based on the above problems, the present invention provides a wheel hub motor for a bullet train and an assembling method thereof, which are used for solving the problem that the axial air gap thickness between the stator and the rotor of the motor varies when a train vibrates, so that the motor cannot work normally. When radial displacement is generated between the rotor disc and the stator disc, the air gap adjusting assembly and the gap adjusting and controlling assembly can adjust and supplement the displacement between the rotor disc and the stator disc, so that the axial air gap thickness of the rotor disc and the axial air gap thickness of the stator disc are not changed, and the motor can normally work.

The invention specifically adopts the following technical scheme for realizing the purpose:

the motor car wheel hub motor comprises a motor support shaft, wherein two sets of magnetic suspension bearing mechanisms which are oppositely arranged are installed on the motor support shaft, a gap regulation and control assembly and a stator disc are further installed on the motor support shaft, the stator disc is located between the two sets of magnetic suspension bearing mechanisms, the gap regulation and control assembly is in contact with the magnetic suspension bearing mechanisms, a rotor disc is installed on the outer peripheral surface of each magnetic suspension bearing mechanism, an air gap regulation assembly in contact with the stator disc is installed on the rotor disc, the rotor disc is connected with a motor car wheel core through a rotor shell, and the motor car wheel core is connected with a wheel hub.

One structure of the magnetic suspension bearing mechanism is as follows: the magnetic suspension bearing mechanism comprises an external magnetic steel mounting seat, an external magnetic steel sleeve group, an internal magnetic steel sleeve group and an internal magnetic steel mounting seat which are sequentially connected from outside to inside, and the external magnetic steel mounting seat is connected with the rotor shell.

As a preferred mode, the external magnetic steel sleeve set comprises an external magnetic steel flux sleeve and an external magnetic steel protective sleeve, an external magnetic steel flux ring is installed between the external magnetic steel flux sleeve and the external magnetic steel protective sleeve, and the external magnetic steel sleeve positioned between the external magnetic steel flux sleeve and the external magnetic steel protective sleeve is installed on two sides of the external magnetic steel flux ring; the inner magnetic steel sleeve set comprises an inner magnetic steel sleeve and an inner magnetic steel protective sleeve, the inner magnetic steel sleeve is installed on the circumferential surface of the inner magnetic steel installation seat, an inner magnetic steel magnetic ring is installed between the inner magnetic steel sleeve and the inner magnetic steel protective sleeve, the inner magnetic steel sleeve located between the inner magnetic steel sleeve and the inner magnetic steel protective sleeve is installed on the two sides of the inner magnetic steel magnetic ring, the inner magnetic steel protective sleeve is located in the outer magnetic steel protective sleeve, and a suspension air gap is reserved between the inner magnetic steel protective sleeve and the outer magnetic steel protective sleeve.

The structure of the gap regulating assembly is as follows: the clearance adjusting and controlling assembly comprises a spring seat arranged on a motor supporting shaft, a radial groove is formed in the spring seat, a bearing seat is arranged in the radial groove, a rolling bearing in contact with the inner side of the outer magnetic steel mounting seat is arranged in the bearing seat through a spacing washer, a radial spring in contact with the bearing seat is further arranged in the radial groove, and a radial nut is further arranged on the circumferential surface of the spring seat.

The structure of the air gap adjusting assembly is as follows: open on the rotor disc has the mounting hole, the air gap adjusting part is including installing the base in the mounting hole, install the axial nut on the periphery of base, it has the axial groove to open in the base, the axial spring is installed to the axial inslot, the other end of axial spring is connected with the ball tile seat of installing in the mounting groove is downthehole, it has the ball socket to open in the ball tile seat, install the spin with the contact of stator disc in the ball socket, still install the ball tile lid that can block the spin in the mounting hole.

As a preferable mode, the base comprises a circular bottom plate and a coaxial cylinder which are formed into a whole, the axial nut is arranged on the coaxial cylinder, and a guide groove which is communicated with the axial groove and is coaxial with the axial groove and the ball tile seat is arranged in the coaxial cylinder; the ball bearing seat comprises a bearing part and a guide rod which are formed into a whole, the ball socket is arranged in the bearing part, the guide rod is positioned in the axial spring, and the diameter of the guide groove is smaller than that of the axial groove and larger than that of the guide rod.

The structure of the stator disc is as follows: the stator disc is including installing the iron core seat on the motor support shaft, install stator core and armature coil winding on the iron core seat, closed slot disc is installed to the outer terminal surface of armature coil winding, install hall element on the closed slot disc, still open the hole on the motor support shaft, be connected with on the stator core and pass the hole and extend to the power supply cable in the motor support shaft, hall element is connected with the signal line that passes the hole and extend to the motor support shaft.

Preferably, the stator core has a plurality of slots formed in a radial end surface thereof, and the armature coil winding is fitted in the slots.

The structure of the rotor disc is as follows: the rotor disc includes from inside to outside shaping inner ring, collar and outer loop as an organic whole in proper order, the inner ring is installed on the outer peripheral face of magnetic suspension bearing mechanism, it has a plurality of columnar order grooves to open on the collar, the magnetic conduction dish is installed to the bottom in columnar order groove, the columnar order inslot install with the permanent magnet of magnetic conduction dish contact, the safety cover is still installed to the terminal surface of rotor disc.

The assembling method of the wheel hub motor of the bullet train comprises the following steps:

step 1: assembling a stator disc and a rotor disc, and fixedly connecting an inner magnetic steel sleeve group with an inner magnetic steel mounting seat;

step 2: fixing the inner magnetic steel mounting seat on the motor supporting shaft in a manner of clamping a stator disc, and uniformly fixing the spring seats of the multiple groups of gap regulation and control assemblies on the outer peripheral side of the motor supporting shaft;

and step 3: mounting a plurality of groups of air gap adjusting assemblies into mounting holes on the rotor disc, and adjusting axial nuts on the air gap adjusting assemblies to enable the rolling balls to protrude out of the surface of the rotor disc; respectively installing a plurality of groups of outer magnetic steel sleeve sets and outer magnetic steel sleeve installation seats into a rotor disc and a rotor shell;

and 4, step 4: respectively assembling a plurality of groups of external magnetic steel sleeve sets in the step 3 onto a plurality of groups of internal magnetic steel sleeve sets in the step 2, fixedly connecting a rotor disc with a rotor shell, and then adjusting a working air gap and a suspension air gap of the motor by adjusting an axial nut on an air gap adjusting assembly and a radial nut on a gap adjusting assembly;

and 5: fixedly installing a left supporting shaft cover plate and a right supporting shaft cover plate on a motor supporting shaft;

step 6: fixing the rotor disc and the rotor shell to a wheel core of the motor car;

and 7: and (4) interference assembling the bullet train wheel core to the wheel hub.

The invention has the following beneficial effects:

(1) when the motor car runs and the rotor disc and the stator disc generate radial displacement due to vehicle vibration, a pair of magnetic suspension bearing mechanisms made of two sets of rare earth permanent magnet steel are used for assembly, the displacement change between the rotor disc and the stator disc can be instantly adapted, and the gap between the outer magnet steel sleeve group and the inner magnet steel sleeve group is instantly regulated and controlled through two sets of assembly mechanisms, namely three sets of rolling bearings, springs and the like, so that the rotor disc is continuously supported and continuously runs around the axis parallel to the stator disc, and the motor can still normally, continuously, stably and safely work.

(2) The twelve rare earth permanent magnet steels of the rotor disc have sufficient magnetic energy product, the bodies of the twelve rare earth permanent magnet steels are designed into equilateral trapezoid cylinders, and the right fit tolerance is selected, so that the twelve rare earth permanent magnet steels can be conveniently assembled and disassembled with the mounting ring.

(3) Thirty-six lower special-shaped slotted holes are cut on the radial surface of the stator core, the special-shaped slotted holes are designed into the special-shaped slotted holes with narrow inner ring notches and deep slotted holes, wide outer ring notches and shallow slotted holes, and the sectional area of the slotted holes is enlarged as much as possible, so that a lead which can be electrified by 200 amperes of current can be contained in the armature coil winding, and after the armature coil winding is completely off-line, a closed-slot disc made of a magnetic conductive material is arranged outside the special-shaped slotted holes, so that the electromagnetic torque capacity which can be sent by an armature can be greatly excavated.

(4) The invention integrates the rotor disc and the rotor shell into a whole and then installs the rotor disc on the wheel core of the motor car wheel, and actually changes partial weight of the motor rotor into the original weight of the wheel of the prime motor car, so that no matter what kind of material is adopted to design and manufacture the disc drive hub motor, excessive unsprung weight is not added to the motor car wheel.

(5) The disc drive hub motor is a new special type of the rare earth permanent magnet brushless direct current motor, needs to be matched with a special electronic driver for design and manufacture, is suitable for replacement and upgrade of urban rail trains, implements automatic control and unmanned driving, and has wide application range.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is a schematic front sectional view of a stator disk of the present invention;

FIG. 3 is a schematic side view of a rotor disk of the present invention;

FIG. 4 is a schematic front sectional view of a rotor disk of the present invention;

FIG. 5 is a schematic view of the sectional structure of the magnetic suspension bearing mechanism of the present invention installed on the motor supporting shaft;

FIG. 6 is a schematic view of the magnetic bearing mechanism of the present invention in cross-sectional elevation;

FIG. 7 is a schematic side view of the gap control assembly of the present invention mounted on a motor support shaft;

FIG. 8 is a schematic side view of a gap-setting assembly of the present invention;

FIG. 9 is a schematic front sectional view of a gap adjustment assembly of the present invention;

FIG. 10 is a schematic side view of the air gap adjustment assembly of the present invention mounted to a rotor disk;

FIG. 11 is a simplified elevational cross-sectional view of the air gap adjustment assembly of the present invention;

FIG. 12 is a schematic front sectional view of a base according to the present invention;

FIG. 13 is a schematic front sectional view of a ball shoe seat according to the present invention;

reference numerals: 1 wheel hub, 2 magnetic suspension bearing mechanism, 21 external magnetic steel sleeve, 22 external magnetic steel sleeve, 23 external magnetic steel ring, 24 external magnetic steel sleeve, 25 internal magnetic steel sleeve, 26 internal magnetic steel sleeve, 27 internal magnetic steel ring, 28 internal magnetic steel sleeve, 29 internal magnetic steel mount, 210 external magnetic steel mount, 3 air gap adjustment assembly, 31 ball, 32 ball cover, 33 ball seat, 331 guide rod, 332 bearing portion, 3321 ball socket, 34 axial spring, 35 axial nut, 36 base, 361 round base plate, 362 coaxial cylinder, 3621 guide slot, 3622 axial slot, 4 motor vehicle wheel core, 5 rotor disk, 51 mounting ring, 52 outer ring, 53 inner ring, 54 magnetic disk, 55 permanent magnet, 56 protective cover, 57 mounting hole, 6 disk stator, 61 stator core, 62 armature coil winding, 63 core seat, 64 closed slot disk, 65 hall element, 66 power supply cable, 67 signal line, 7 rotor shell, 8 motor supporting shaft, 9 clearance adjusting and controlling component, 91 rolling bearing, 92 spacing washer, 93 bearing seat, 94 radial nut, 95 spring seat, 951 radial groove and 96 radial spring.

Detailed Description

For a better understanding of the present invention by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and the following examples. The description is directed to a disc drive hub motor designed by taking the selected bullet train wheel with the outer diameter of phi 840mm as a sample plate, but the invention is not limited to be applied to any other types of urban rail trains, and is required to be used for matching and popularizing bullet train wheels with different outer diameters according to the technical indexes required by the trains. The method comprises the following steps: the outer diameter of the wheels of the motor train, the highest running speed of the train, the voltage of a power supply, the maximum torque required by the start of the train (the total mass of the whole train when the train carries passengers at the maximum) and the like, and various technical parameters of the motor are determined. The train power supply provided by the invention adopts DC440V, and the main technical indexes which can be realized by the motor are as follows: the rotation speed is 800-.

Example 1:

as shown in fig. 1, a wheel hub motor of a motor car and an assembly method thereof comprise a motor support shaft 8, two sets of magnetic suspension bearing mechanisms 2 which are oppositely arranged are installed on the motor support shaft 8, a gap regulation and control assembly 9 and a stator disc 6 are also installed on the motor support shaft 8, the stator disc 6 is positioned between the two sets of magnetic suspension bearing mechanisms 2, the gap regulation and control assembly 9 is contacted with the magnetic suspension bearing mechanisms 2, a rotor disc 5 is installed on the outer peripheral surface of the magnetic suspension bearing mechanisms 2, an air gap regulation assembly 3 which is contacted with the stator disc 6 is installed on the rotor disc 5, the rotor disc 5 is connected with a wheel core 4 of the motor car through a rotor shell 7, and the wheel core 4 of the.

The working principle is as follows: the stator disc 6 is fixedly arranged on the motor supporting shaft 8, the rotor disc 5 realizes motor air gap adjustment through a plurality of air gap adjusting assemblies 3 arranged on the stator disc 6, after the required air gap thickness is adjusted, the rotor disc 5 and the rotor shell 7 are assembled into a whole, and then the rotor disc 5 and the wheel core 4 of the motor car are assembled through a plurality of connecting bolts, the wheel core 4 of the motor car and the wheel hub 1 of the motor car are completed by adopting a heating sleeving process according to the interference required by the technical conditions of the train, and part of the weight of the rotor of the motor is actually converted into the original weight of the wheel of the prime vehicle, so that the excessive unsprung weight of the wheel of the motor car is not increased no matter which material is adopted to design and manufacture the disc drive hub motor. When radial displacement is generated between the rotor disc 5 and the stator disc 6, the air gap adjusting component 3 and the gap adjusting and controlling component 9 can adjust and supplement the displacement between the rotor disc 5 and the stator disc 6, so that the axial air gap thickness of the rotor disc 5 and the axial air gap thickness of the stator disc 6 are not changed, and the motor can normally work.

As shown in fig. 2, the specific structure of the stator disc is as follows: stator disc 6 is including installing the iron core seat 63 on motor support shaft 8, install stator core 61 and armature coil winding 62 on the iron core seat 63, closed slot disc 64 is installed to the outer terminal surface of armature coil winding 62, install hall element 65 on the closed slot disc 64, still open the hole on the motor support shaft 8, be connected with on the stator core 61 and pass the hole and extend to the power supply cable 66 in the motor support shaft 8, hall element 65 is connected with and passes the hole and extend to the signal line 67 in the motor support shaft 8. The stator core 61 is formed by combining silicon steel sheets into a cylindrical shape, and thirty-six special-shaped slotted holes uniformly distributed according to the circumference are cut on the radial end face of the stator core. The slotted hole is a special-shaped slotted hole with narrow inner ring notch, deep slotted hole, wide outer ring notch and shallow slotted hole, the structure enlarges the sectional area of the slotted hole as much as possible, the armature coil winding 62 can realize the flow of large current of about 200 amperes under the size of the stator disc 6, and the electromagnetic torque capacity and the power density are improved. The armature coil winding 62 is dispersedly embedded in the twelve special-shaped slotted holes, after the armature coil winding 62 is offline, the outer end face is provided with the closed-slot disc 64 made of magnetic conductive materials, and the closed-slot disc 64 not only can eliminate the magnetic leakage effect of the slotted holes, but also can greatly improve the effective electromagnetic function emitted by the motor and also can lighten the electromagnetic noise and the vibration emitted by the motor. The stator core 61 having completed the coil insertion is fitted with the core holder 63 and integrally mounted to the motor supporting shaft 8. The motor supporting shaft 8 is provided with a hollow inner hole, the power supply cable 66 and the signal wire 67 are pulled out of the inner hole of the motor supporting shaft 8 together, and meanwhile, the inner hole of the motor supporting shaft 8 is also used for being connected with an air supply mechanism for forced cooling of the motor and used for forced air cooling of the armature coil winding 62.

As shown in fig. 3-4, the rotor disc 5 includes an inner ring 53, a mounting ring 51, and an outer ring 52, which are sequentially formed as a whole from inside to outside, the inner ring 53 is mounted on the outer peripheral surface of the magnetic suspension bearing mechanism 2, the mounting ring 51 is provided with a plurality of cylindrical grooves, the bottoms of the cylindrical grooves are provided with magnetic conductive discs 54, permanent magnets 55 contacting with the magnetic conductive discs 54 are mounted in the cylindrical grooves, and the end surfaces of the rotor disc 5 are further provided with protective covers 56. The mounting ring 51 is a cylindrical structure, the mounting ring 51 is provided with equilateral cylindrical grooves, the inner and outer rings of which are equal in number in the radial direction, the cylindrical grooves are preferably twelve sides, and a circular inner ring 53 and a circular outer ring 52 are respectively arranged in the radial direction of the cylindrical grooves. The inner ring 53 has a circular hollow structure for accommodating the magnetic bearing mechanism 2, and a plurality of holes are uniformly distributed on the circumference of the inner ring 53 for accommodating the air gap adjusting assembly 3, preferably three holes. A plurality of fixing holes are uniformly distributed on the circumference of the outer ring 52, the rotor disc 5 and the rotor shell 7 are integrally assembled through the fixing holes, a cylindrical groove on the mounting ring 51 is used for mounting a permanent magnet 55, the permanent magnet 55 can be selected from rare earth permanent magnet steel blocks, and the mounting ring 51 is used for transmitting mechanical torque. The bottom of the cylindrical groove is provided with a magnetic conductive disc 54, the magnetic conductive disc 54 has the same number of sides as the cylindrical groove, the permanent magnets 55 are all made into isosceles trapezoid columns which are matched with the cylindrical groove and arranged in the cylindrical groove, and the protective cover 56 is made of non-magnetic conductive materials, such as non-embroidered steel sheets, and is arranged on the end face of the magnetic pole on the mounting ring 51.

Example 2:

as shown in fig. 5-6, on the basis of the above embodiment 1, this embodiment provides a preferred structure of the magnetic suspension bearing mechanism, that is, the magnetic suspension bearing mechanism 2 includes an outer magnetic steel mounting seat 210, an outer magnetic steel sleeve group, an inner magnetic steel sleeve group and an inner magnetic steel mounting seat 29 which are connected in sequence from outside to inside, and the outer magnetic steel mounting seat 210 is connected with the rotor housing 7. The external magnetic steel sleeve set comprises an external magnetic steel flux sleeve 21 and an external magnetic steel protective sleeve 24, an external magnetic steel flux ring 23 is arranged between the external magnetic steel flux sleeve 21 and the external magnetic steel protective sleeve 24, and external magnetic steel sleeves 22 positioned between the external magnetic steel flux sleeve 21 and the external magnetic steel protective sleeve 24 are arranged on two sides of the external magnetic steel flux ring 23; the inner magnetic steel sleeve group comprises an inner magnetic steel flux sleeve 28 and an inner magnetic steel protective sleeve 25, the inner magnetic steel flux sleeve 28 is installed on the circumferential surface of the inner magnetic steel installation seat 29, an inner magnetic steel flux ring 27 is installed between the inner magnetic steel flux sleeve 28 and the inner magnetic steel protective sleeve 25, the inner magnetic steel sleeve 26 located between the inner magnetic steel flux sleeve 28 and the inner magnetic steel protective sleeve 25 is installed on the two sides of the inner magnetic steel flux ring 27, the inner magnetic steel protective sleeve 25 is located in the outer magnetic steel protective sleeve 24, and a suspension air gap is reserved between the inner magnetic steel protective sleeve 25 and the outer magnetic steel protective sleeve 24.

In this embodiment: two groups of magnetic suspension bearing mechanisms 2 are respectively arranged at two sides of a stator disc 6 to respectively realize the rotary connection of a rotor disc 5 and a rotor shell 7 with a motor support shaft 8, an outer magnetic steel magnetic conduction sleeve 21 is annular and is positioned at the outermost side, two groups of annular outer magnetic steel sleeves 22 with opposite polarities are fixed on the inner surface of each outer magnetic steel sleeve, an annular outer magnetic steel magnetic conduction ring 23 is arranged between the two outer magnetic steel sleeves 22, and an outer magnetic steel protective sleeve 24 is fixedly arranged on the inner surfaces of the outer magnetic steel sleeves 22 and the outer magnetic steel magnetic conduction rings 23. The inner magnetic steel protective sleeve 25 is arranged in the outer magnetic steel protective sleeve 24, and a suspension air gap is formed between the inner magnetic steel protective sleeve and the outer magnetic steel protective sleeve. Two groups of annular inner magnetic steel sleeves 26 with opposite polarities are fixed on the inner surface of the inner magnetic steel protective sleeve 25, an annular inner magnetic steel magnetic conductive ring 27 is arranged between the two inner magnetic steel sleeves 26, the inner magnetic steel sleeves 26 and the inner magnetic steel magnetic conductive ring 27 are fixedly provided with the inner magnetic steel magnetic conductive sleeve 28, the inner magnetic steel magnetic conductive sleeve 28 is fixedly connected with the inner magnetic steel mounting seat 29, the inner magnetic steel mounting seat 29 is fixedly connected with the motor support shaft 8, and the pair of outer magnetic steel magnetic conductive sleeves 21 is fixedly connected with the rotor disc 5 and the rotor shell 7.

Example 3:

as shown in fig. 7 to 9, based on the

above embodiments

1 and 2, this embodiment provides a preferred structure of the gap adjusting and controlling assembly, the gap adjusting and controlling assembly 9 includes a spring seat 95 installed on the motor supporting shaft 8, a radial groove 951 is formed in the spring seat 95, a bearing seat 93 is installed in the radial groove 951, a rolling bearing 91 contacting with the inner side of the outer magnetic steel installation seat 210 is installed in the bearing seat 93 through a spacer washer 92, a radial spring 96 contacting with the bearing seat 93 is also installed in the radial groove 951, and a radial nut 94 is also installed on the circumferential surface of the spring seat 95.

In this embodiment: two ends of the radial spring 96 respectively abut against the bottom of the radial groove 951 and one end of the bearing seat 93, so that the bearing seat 93 can slide in the radial groove 951, the spring seats 95 of the three groups of bearing gap regulation and control assemblies 9 are uniformly fixed on the outer peripheral side of the motor supporting shaft 8, and the rolling bearing 91 abuts against the inner side of the outer magnetic steel mounting seat 210. Firstly, two groups of three sets of bearing gap regulating and controlling assemblies 9 and inner magnetic steel sleeve sets and inner magnetic steel mounting seats 29 are respectively mounted at the set positions of the motor supporting shaft 8, and then two groups of outer magnetic steel sleeve sets and outer magnetic steel sleeve 22 mounting seats are mounted on the rotor disc 5. Because the spring seat 95 is connected with the radial nut 94 through threads, the air gap is adjusted through the radial nut 94, the radial nut 94 is not rotated after the air gap is adjusted, and the spring seat 95 is locked by the radial nut 94. When the rotor disc 5 vibrates to cause the radial displacement between the rotor disc 5 and the stator disc 6, the clearance between the outer magnetic steel sleeve 22 is changed instantaneously to adapt to the displacement change between the rotor disc 5 and the stator disc 6, and the rolling shaft of the bearing clearance adjusting and controlling assembly 9 and the radial spring 96 can be adjusted and compensated instantaneously and frequently under the action of elastic force, so that the motor can normally work.

Example 4:

as shown in fig. 10 to 13, this embodiment provides a preferred structure of the air gap adjusting assembly based on the above embodiment 1, the rotor disc 5 is provided with a mounting hole 57, the air gap adjusting assembly 3 includes a base 36 installed in the mounting hole 57, an axial nut 35 is installed on the circumferential surface of the base 36, an axial groove 3622 is opened in the base 36, an axial spring 34 is installed in the axial groove 3622, the other end of the axial spring 34 is connected with a ball shoe seat 33 installed in the mounting hole, a ball socket 3321 is opened in the ball shoe seat 33, a ball 31 contacting with the stator disc 6 is installed in the ball socket 3321, and a ball cap 32 capable of blocking the ball 31 is also installed in the mounting hole 57.

In this embodiment: the base 36 comprises a circular bottom plate 361 and a coaxial cylinder 362 which are formed into a whole, the axial nut 35 is installed on the coaxial cylinder 362, and a guide groove 3621 which is communicated with the axial groove 3622 and is coaxial with the axial groove 3622 and the ball tile seat 33 is further formed in the coaxial cylinder 362; the ball socket 33 comprises a bearing part 332 and a guide rod 331 which are integrally formed with each other, a ball socket is opened in the bearing part 332, the guide rod 331 is positioned in the axial spring 34, and the diameter of the guide groove 3621 is smaller than that of the axial groove 3622 and larger than that of the guide rod 331. The outer peripheral wall of the coaxial cylinder 362 is provided with threads matched with the axial nut 35, the three groups of air gap adjusting assemblies 3 are uniformly arranged at the same circumferential position of the radial plane of the rotor disc 5, and the rolling balls 31 are abutted against the stator disc 6. The air gaps of the motor can be respectively adjusted through the three groups of air gap adjusting assemblies 3, and the specific adjusting mode is as follows: because the base 36 is connected with the axial nut 35 through the screw thread, the adjustment of the motor air gap can be realized by adjusting the axial nut 35, after the motor air gap is adjusted, the axial nut 35 is not rotated any more, so that the motor air gap reaches the air gap thickness required by the technology, the air gap thickness of the same plane is kept consistent, and the motor air gap is locked through the axial nut 35 after the air gap thickness is adjusted. In operation of the motor, the three balls 31 support the stator disc 6 and rotate with the rotor disc 5 together with all of the air gap adjustment assemblies 3. Meanwhile, when the stator disk 6 and the rotor disk 5 generate radial displacement, the thickness of the plane air gap of the motor is kept unchanged under the action of the elastic force of the axial spring 34, so that the motor can normally work.

As shown in fig. 1 to 13, the method for assembling the motor of the wheel hub 1 of the bullet train comprises the following steps:

step 1: assembling the stator disc 6 and the rotor disc 5, and fixedly connecting the inner magnetic steel sleeve group with the inner magnetic steel mounting seat 29;

step 2: the inner magnetic steel mounting seat 29 is fixed on the motor supporting shaft 8 in a mode of clamping the stator disc 6, and the spring seats 95 of the multiple groups of gap regulating and controlling assemblies 9 are uniformly fixed on the outer peripheral side of the motor supporting shaft 8;

and step 3: mounting a plurality of groups of air gap adjusting assemblies 3 into mounting holes 57 on the rotor disc 5, and adjusting axial nuts 35 on the air gap adjusting assemblies to enable the rolling balls 31 to protrude out of the surface of the rotor disc 5; a plurality of groups of outer magnetic steel sleeve sets and outer magnetic steel sleeve 22 mounting seats are respectively mounted inside the rotor disc 5 and the rotor shell 7;

and 4, step 4: respectively assembling a plurality of groups of external magnetic steel sleeve sets in the step 3 onto a plurality of groups of internal magnetic steel sleeve sets in the step 2, fixedly connecting the rotor disc 5 with the rotor shell 7, and then adjusting the working air gap and the suspension air gap of the motor by adjusting the axial nut 35 on the air gap adjusting assembly 3 and the radial nut 94 on the gap adjusting assembly 9;

and 5: fixedly mounting a left supporting shaft cover plate and a right supporting shaft cover plate on a motor supporting shaft 8;

step 6: fixing the rotor disc 5 and the rotor shell 7 on the motor car wheel core 4;

and 7: the bullet wheel core 4 is interference fitted to the wheel hub 1.

The number of the preferred air gap adjusting assemblies 3 is three, the number of the sleeve bearing gap adjusting assemblies 9 is two, each group is three, and each group of the sleeve bearing gap adjusting assemblies 9 corresponds to one group of the magnetic suspension bearing mechanisms 2. Only the outer magnetic steel mounting seat 210 in the right set of magnetic suspension bearing mechanism 2 is connected with the rotor housing 7, only the outer peripheral surface of the left set of magnetic suspension bearing mechanism 2 is provided with the rotor disc 5, and the motor support shaft 8 is also provided with a left support shaft cover plate and a right support shaft cover plate.

The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only for the purpose of clearly illustrating the verification process of the invention and are not intended to limit the scope of the invention, which is defined by the claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.

Claims

1. The utility model provides a motor car wheel in-wheel motor, includes motor back shaft (8), its characterized in that: install two sets of magnetic suspension bearing mechanism (2) of relative setting on motor back shaft (8), still install gapped regulation and control subassembly (9) and stator disc (6) on motor back shaft (8), stator disc (6) are located between two sets of magnetic suspension bearing mechanism (2), gapped regulation and control subassembly (9) and magnetic suspension bearing mechanism (2) contact, install rotor disc (5) on the outer peripheral face of magnetic suspension bearing mechanism (2), install air gap adjusting part (3) with stator disc (6) contact on rotor disc (5), rotor disc (5) are connected with motor car wheel core (4) through rotor shell (7), motor car wheel core (4) are connected with wheel hub (1).

2. A motor car wheel hub motor as claimed in claim 1, wherein: the magnetic suspension bearing mechanism (2) comprises an external magnetic steel mounting seat (210), an external magnetic steel sleeve set, an internal magnetic steel sleeve set and an internal magnetic steel mounting seat (29) which are sequentially connected from outside to inside, and the external magnetic steel mounting seat (210) is connected with the rotor shell (7).

3. A motor car wheel hub motor as claimed in claim 2, wherein: clearance regulation and control subassembly (9) is including installing spring holder (95) on motor support shaft (8), radial groove (951) have been seted up in spring holder (95), install bearing frame (93) in radial groove (951), install antifriction bearing (91) with outer magnet steel mount pad (210) inboard contact through interval packing ring (92) in bearing frame (93), still install radial spring (96) with bearing frame (93) contact in radial groove (951), still install radial nut (94) on the periphery of spring holder (95).

4. A motor car wheel hub motor as claimed in claim 2, wherein: the external magnetic steel sleeve set comprises an external magnetic steel flux sleeve (21) and an external magnetic steel protective sleeve (24), an external magnetic steel conductive ring (23) is arranged between the external magnetic steel flux sleeve (21) and the external magnetic steel protective sleeve (24), and external magnetic steel sleeves (22) positioned between the external magnetic steel flux sleeve (21) and the external magnetic steel protective sleeve (24) are arranged on two sides of the external magnetic steel conductive ring (23); interior magnetic steel suit includes interior magnetic steel flux sleeve (28) and interior magnetic steel protective sheath (25), install on the periphery of interior magnetic steel mount pad (29) interior magnetic steel flux sleeve (28), install interior magnetic steel flux ring (27) between interior magnetic steel flux sleeve (28) and interior magnetic steel protective sheath (25), interior magnetic steel cover (26) that are located between interior magnetic steel flux sleeve (28) and interior magnetic steel protective sheath (25) are installed to the both sides of interior magnetic steel flux ring (27), interior magnetic steel protective sheath (25) are located outer magnetic steel protective sheath (24), and leave the suspension air gap between interior magnetic steel protective sheath (25) and outer magnetic steel protective sheath (24).

5. A motor car wheel hub motor as claimed in claim 1, wherein: open on rotor disc (5) and have mounting hole (57), air gap adjusting part (3) is including installing base (36) in mounting hole (57), install axial nut (35) on the periphery of base (36), axial groove (3622) have been seted up in base (36), axial spring (34) are installed in axial groove (3622), the other end of axial spring (34) is connected with ball tile seat (33) of installing in mounting groove hole (57), it has ball socket (331) to open in ball tile seat (33), install spin (31) with stator disc (6) contact in ball socket (331), still install ball tile lid (32) that can block (31) in mounting hole (57).

6. A motor car wheel hub motor as claimed in claim 5, wherein: the base (36) comprises a circular bottom plate (361) and a coaxial cylinder (362) which are formed into a whole, the axial nut (35) is installed on the coaxial cylinder (362), and a guide groove (3621) which is communicated with the axial groove (3622) and is coaxial with the axial groove (3622) and the spherical tile seat (33) is further formed in the coaxial cylinder (362); the ball bush seat (33) comprises a bearing part (332) and a guide rod (331) which are integrally formed, the ball socket (331) is arranged in the bearing part (332), the guide rod (331) is located in the axial spring (34), and the diameter of the guide groove (3621) is smaller than that of the axial groove (3622) and larger than that of the guide rod (331).

7. A motor car wheel hub motor as claimed in claim 1, wherein: stator disc (6) is including installing iron core seat (63) on motor support shaft (8), install stator core (61) and armature coil winding (62) on iron core seat (63), closed slot disc (64) are installed to the outer terminal surface of armature coil winding (62), install hall element (65) on closed slot disc (64), still open the hole on motor support shaft (8), be connected with on stator core (61) and pass the hole and extend to power supply cable (66) in motor support shaft (8), hall element (65) are connected with and pass hole and extend to signal line (67) in motor support shaft (8).

8. A motor car wheel hub motor as claimed in claim 7, wherein: the radial end face of the stator core (61) is provided with a plurality of special-shaped slotted holes, and the armature coil winding (62) is embedded in the special-shaped slotted holes.

9. A motor car wheel hub motor as claimed in claim 1, wherein: rotor disc (5) include from inside to outside shaping inner ring (53), collar (51) and outer ring (52) as an organic whole in proper order, install on the outer peripheral face of magnetic suspension bearing mechanism (2) inner ring (53), it has a plurality of columnar order to open on collar (51), magnetic conduction dish (54) is installed to the bottom in columnar order groove, the columnar order is inslot install permanent magnet (55) with magnetic conduction dish (54) contact, safety cover (56) are still installed to the terminal surface of rotor disc (5).

10. The assembling method of the wheel hub motor of the bullet train is characterized by comprising the following steps: the method comprises the following steps:

step 1: assembling a stator disc (6) and a rotor disc (5), and fixedly connecting an inner magnetic steel sleeve group with an inner magnetic steel mounting seat (29);

step 2: the inner magnetic steel mounting seat (29) is fixed on the motor supporting shaft (8) in a mode of clamping the stator disc (6), and the spring seats (95) of the multiple groups of gap regulating and controlling assemblies (9) are uniformly fixed on the outer peripheral side of the motor supporting shaft (8);

and step 3: mounting a plurality of groups of air gap adjusting assemblies (3) into mounting holes (57) on a rotor disc (5), and adjusting axial nuts (35) on the air gap adjusting assemblies (3) to enable rolling balls (31) to protrude out of the surface of the rotor disc (5); respectively installing a plurality of groups of outer magnetic steel sleeve sets and outer magnetic steel sleeve (22) installing seats into the rotor disc (5) and the rotor shell (7);

and 4, step 4: respectively assembling a plurality of groups of external magnetic steel sleeve sets in the step 3 onto a plurality of groups of internal magnetic steel sleeve sets in the step 2, fixedly connecting a rotor disc (5) with a rotor shell (7), and then adjusting a working air gap and a suspension air gap of the motor by adjusting an axial nut (35) on an air gap adjusting assembly (3) and a radial nut (94) on a gap adjusting assembly (9);

and 5: fixedly mounting a left supporting shaft cover plate and a right supporting shaft cover plate on a motor supporting shaft (8);

step 6: fixing the rotor disc (5) and the rotor shell (7) on the motor car wheel core (4);

and 7: and (3) assembling the bullet train wheel core (4) to the wheel hub (1) in an interference fit mode.