CN220754451U - Planetary reduction electric vehicle motor and wheel hub - Google Patents

Abstract

The utility model discloses a planetary reduction electric vehicle motor, which comprises a motor assembly body integrated with a planetary reduction assembly, wherein the motor assembly body comprises a motor rotor, and a sine wave magnetic field structure is arranged on the motor rotor. A wheel hub is also disclosed. According to the planetary reduction electric vehicle motor, the magnetic field is optimized at the part of the motor rotor, so that the change of the magnetic field is closer to a sine waveform, namely a sine waveform of driving current, and the use efficiency of electric energy is higher. Because the magnetic field of the rotor is more similar to a sine waveform, the effect of the controller is better when the controller performs weak magnetic treatment, and the weak magnetic effect can reach about 40%. Meanwhile, the design requirements of the electric vehicle for large torque and high rotation speed are met, the hub of the electric vehicle adopts an integrated design, the structure is compact, and the use design requirements of electric vehicles of different models can be met.

Description

Planetary reduction electric vehicle motor and wheel hub

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to a planetary reduction electric vehicle motor and a vehicle hub.

Background

The existing electric vehicle, such as a scooter and the like, is generally driven by a motor, but the traditional inner rotor brushless BLDC direct current motor is limited by a magnetic field, so that the use efficiency of electric energy is low, the effect of a controller is not ideal when the controller performs weak magnetic treatment, and the design requirements of high torque and high rotation speed cannot be met at the same time. That is, if the high torque is satisfied, the high rotational speed requirement cannot be satisfied, and if the high rotational speed is satisfied, the high torque operation cannot be realized, and the high torque and the high rotational speed requirement cannot be realized at the same time.

Chinese patent literature (publication day: 2019-01-11, publication number: CN 208369393U) discloses a permanent magnet direct current motor with high rotation speed and large torque, which comprises a motor body, one end of the motor body is welded with a differential mechanism, a rotating shaft is connected inside the differential mechanism in a penetrating way, a brake roller is sleeved on the outer wall of the rotating shaft, a fixed clamping ring is sleeved on the outer wall of the motor body, two mounting plates are symmetrically welded on the outer wall of the fixed clamping ring through a connecting part, a control motor is fixed on the top of one of the mounting plates through a fixing frame, an output shaft of the control motor penetrates through the mounting plate, a threaded rod is welded on the output shaft of the control motor, and bearings are sleeved on two ends of the threaded rod. According to the utility model, the braking roller is sleeved on the rotating shaft of the motor body, and meanwhile, the braking clamp for carrying out emergency stop on the braking roller is arranged on the threaded rod between the two mounting plates, so that the motor has an effect of being capable of carrying out emergency stop, and the safety of the device is improved.

Although the technical scheme can realize high rotation speed and high torque, the motor cannot be applied to vehicles such as electric vehicles and scooter.

Disclosure of Invention

The utility model aims to solve the problem that the existing motor for the electric vehicle cannot meet the design requirements of high rotating speed and high torque at the same time, and provides a planetary reduction electric vehicle motor which can meet the design requirements of the electric vehicle on high rotating speed and high torque at the same time, and can optimize a magnetic field, so that the change of the magnetic field is more similar to a sine waveform, namely a sine waveform of driving current, the use efficiency of electric energy is higher, and the effect of a controller in weak magnetic treatment is better. The wheel hub with the planetary reduction electric vehicle motor is capable of meeting the requirements of high torque and high rotation speed of the electric vehicle.

The technical scheme adopted by the utility model for realizing the first utility model purpose is as follows: the utility model provides a planetary reduction electric motor car motor, is used for with planetary reduction subassembly integrated as an organic whole motor assembly body, the motor assembly body include motor rotor be provided with sine wave magnetic field structure on the motor rotor.

According to the planetary reduction electric vehicle motor, through brand new design of the motor rotor, the sine wave magnetic field structure is arranged on the motor rotor, a waveform close to sine is generated through the sine wave magnetic field structure, namely, a sine waveform of driving current is generated, so that the use efficiency of electric energy can be greatly improved, the use efficiency is higher, meanwhile, the effect of an electric vehicle controller in weak magnetic treatment is better, the effect of weak magnetic can reach about 40% by utilizing the sine wave magnetic field structure, and the electric vehicle motor is improved by at least one time compared with a conventional weak magnetic scheme. The motor of the planetary reduction electric vehicle is simple in structure and convenient to manufacture, can be integrated with a planetary reduction assembly into a whole, is compact in structure and small in occupied space, and can meet the design requirements of high rotating speed and large torque.

Preferably, the sine wave magnetic field structure is a plurality of V-shaped through grooves uniformly distributed on the motor rotor and used for forming a sine wave magnetic field and magnetic steel inserted into the V-shaped through grooves. The sine wave magnetic field structure is preferably a V-shaped through groove and magnetic steel inserted in the V-shaped through groove, and the motor rotor is in the rotating process, because the magnetic steel is inserted in the V-shaped through groove and forms a magnetic field which approximates to a sine wave shape with the stator, the electric energy utilization efficiency is greatly improved, and the weak magnetic treatment effect is good.

Preferably, the V-shaped through groove is formed by a first through groove and a second through groove, wherein the end parts of the first through groove and the end parts of the second through groove are not communicated with each other; the V-shaped through groove is unfolded along the horizontal direction to form a sine wave structure. The V-shaped through grooves are preferably formed by a first through groove and a second through groove, the end parts of the first through groove are not communicated with the end parts of the first through groove, and the second through groove are not communicated with the first through groove.

Preferably, the V-shaped through groove comprises an inner V-shaped through groove and an outer V-shaped through groove which are arranged in parallel. As another preferable mode, the V-shaped through grooves can be arranged into an inner group and an outer group, and the structure can form two parallel sine wave magnetic fields in the use process, so that the electric energy utilization efficiency can be further improved.

Preferably, the inner V-shaped through groove is formed by an inner first through groove and an inner second through groove, the end parts of which are not communicated with each other; the outer V-shaped through groove is composed of an outer first through groove and an outer second through groove, the end parts of which are not communicated with each other. The V-shaped through groove on the inner side is also formed by the first through groove on the inner side and the second through groove on the inner side, the ends of the first through groove are not communicated with each other, the V-shaped through groove on the outer side is also formed by the first through groove on the outer side and the second through groove on the outer side, and after the magnetic steel is inserted into the V-shaped through groove, two magnetic fields close to sine waveforms are formed, so that the magnetic energy utilization efficiency is higher.

Preferably, the inner V-shaped through groove forms an inner sine wave structure after being unfolded along the horizontal direction; the outer V-shaped through groove is unfolded along the horizontal direction to form an outer sine wave structure; the inner sine wave structure and the outer sine wave structure form two sine wave structures which are arranged in parallel up and down.

Preferably, the motor assembly further comprises a motor shell, a motor output shaft and a motor stator, wherein the motor rotor is fixed on the motor output shaft and drives the motor output shaft to rotate, and the motor stator is arranged outside the motor rotor and is positioned inside the motor shell; one end of the motor output shaft is connected with an outlet shaft with an outlet hole, and the other end of the motor output shaft is connected with the planetary reduction assembly. The motor assembly body also comprises motor stator and other parts, and as a preferred scheme, the motor adopts a design structure of an inner rotor outer stator, namely a motor rotor is connected with a motor output shaft and drives the motor output shaft to rotate together, and generates a magnetic field with an external stator coil to be converted into electric energy.

The technical scheme adopted by the utility model for achieving the second utility model purpose is as follows: a wheel hub comprises the planetary reduction electric vehicle motor. The wheel hub is mainly applied to electric vehicles, such as electric scooter and the like. The hub adopts the planetary reduction electric vehicle motor, can simultaneously meet the design requirements of high rotating speed and large torque of the electric vehicle, and can optimize the magnetic field, so that the change of the magnetic field is closer to a sine waveform, namely a sine waveform of driving current, the service efficiency of electric energy is higher, and the effect of the controller in weak magnetic treatment is better.

Preferably, the motor assembly and the electric planetary reduction assembly are integrated in a wheel hub assembly and drive the electric planetary reduction assembly to rotate. Adopt integrated form structure with planet speed reduction electric motor car motor and electric planet speed reduction subassembly integrated inside the wheel hub combination, compact structure can satisfy the operation design requirement of different models' electric motor car.

Preferably, the wheel hub assembly comprises a wheel hub, a disc brake connecting ring, a disc brake end cover, a brake-free connecting ring and a brake-free end cover, wherein the disc brake connecting ring is connected with the disc brake end cover, a planetary reduction assembly installation space is formed inside the disc brake end cover and the disc brake connecting ring, a motor installation space is formed inside the wheel hub, one end of the brake-free connecting ring is connected with the brake-free end cover, and the other end of the brake-free connecting ring is connected with the wheel hub.

The beneficial effects of the utility model are as follows: compared with a traditional inner rotor brushless BLDC direct current motor, the planetary reduction electric vehicle motor has the advantages that the magnetic field is optimized at the rotor part of the motor, so that the change of the magnetic field is more similar to a sine waveform, namely the sine waveform of the driving current, and the use efficiency of electric energy is higher. The magnetic field of the rotor is closer to a sine waveform, so that the effect of the controller is better when the weak magnetic treatment is carried out, the weak magnetic effect can reach about 40%, and is much better than 20% of the conventional weak magnetic scheme. Meanwhile, the design requirements of high torque and high rotation speed of the electric vehicle are met, the hub of the electric vehicle is designed in an integrated mode, the structure is compact, and the use design requirements of electric vehicles of different types can be met.

Drawings

FIG. 1 is a schematic diagram of a planetary reduction electric vehicle motor according to the present utility model;

FIG. 2 is an exploded schematic view of the planetary reduction electric vehicle motor of the present utility model;

FIG. 3 is an axial cross-sectional view of the motor of the planetary reduction electric vehicle of the present utility model;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic view of a motor rotor according to the present utility model;

FIG. 6 is a schematic view of an expanded configuration of the motor rotor of FIG. 5;

fig. 7 is a schematic structural view of a motor rotor in embodiment 2;

fig. 8 is a schematic view showing an expanded structure of a rotor of the motor in embodiment 2;

FIG. 9 is a schematic view of a wheel hub of the present utility model;

FIG. 10 is a schematic view of an exploded construction of the wheel hub of the present utility model;

FIG. 11 is a cross-sectional view of the wheel hub of the present utility model;

FIG. 12 is a schematic view of a planetary reduction assembly according to the present utility model;

FIG. 13 is a schematic view of an exploded view of the planetary reduction assembly of the present utility model;

in the figure: 1. the motor assembly body 10, a motor bearing 11, a motor shell 12, a motor output shaft 13, a motor stator 14, a motor rotor 15, a motor end cover 16, an outlet shaft end cover 17, an outlet shaft, 18, an outlet hole 19 and an outlet bearing;

2. the planetary reduction assembly 21, an inner sun gear, 22, planetary gears, 23, an outer sun gear, 24, a planet carrier, 25 and an overrunning clutch;

3. the wheel hub assembly 31, the wheel hub 32, the disc brake connector ring 33, the disc brake end cover 34, the brake-free connector ring 35 and the brake-free end cover;

4. the planetary speed reduction assembly is arranged in a space, 5, a disc brake output shaft, 6 and a disc brake bearing;

7. a sine wave magnetic field structure 71, an inner side V-shaped through groove 72, an outer side V-shaped through groove 73, an inner side first through groove 74, an inner side second through groove 75, an outer side first through groove 76, an outer side second through groove 77, a first through groove 78 and a second through groove;

8. and magnetic steel 9 and a motor installation space.

Detailed Description

The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1:

in the embodiment shown in fig. 1, 2 and 3, a planetary reduction electric vehicle motor comprises a motor assembly 1 integrated with a planetary reduction assembly 2, wherein the motor assembly 1 comprises a motor rotor 14, and a sine wave magnetic field structure 7 is arranged on the motor rotor 14. The sine wave magnetic field structure 7 is a plurality of V-shaped through grooves uniformly distributed on the motor rotor 14 and used for forming a sine wave magnetic field, and magnetic steel 8 inserted into the V-shaped through grooves. The V-shaped through grooves are provided on the end faces of the motor rotor in the axial direction of the motor rotor 14 and penetrate through both end faces of the motor rotor.

Specifically, the motor assembly 1 includes a motor housing 11, a motor output shaft 12, a motor stator 13 and a motor rotor 14 disposed inside the motor housing 11, the motor rotor 14 is fixed on the motor output shaft 1 and drives the motor output shaft 12 to rotate, the motor stator 13 is disposed outside the motor rotor 14, and motor end covers 15 and outlet shaft end covers 16 are disposed at two ends of the motor housing 11 respectively. The end of the motor rotor 14 facing the outlet spool end cover 16 is connected with an outlet spool 17 through a motor outlet shaft, and the outlet spool 17 is provided with an outlet hole 18. One end of the motor output shaft 12 is connected with the planetary reduction assembly 2, and the other end is connected with the output shaft 17. The motor output shaft 12 is in rotary connection with the motor end cover 15 and the output shaft 17 through a set of motor bearings 10. The outlet shaft 17 is rotatably connected with the brake-free end cover 35 through an outlet bearing 19.

As shown in fig. 4 and 5, a sine wave magnetic field structure 7 is disposed inside the motor rotor 14, and the sine wave magnetic field structure 7 is a plurality of V-shaped through grooves which are uniformly distributed on the motor rotor 14 and can form a sine wave magnetic field. The V-shaped through grooves comprise an inner V-shaped through groove 71 and an outer V-shaped through groove 72, and the inner V-shaped through groove 71 and the outer V-shaped through groove 72 are arranged in parallel. When in use, the magnetic steel 8 is inserted into the V-shaped through groove. The V-shaped openings of the inner V-shaped through groove 71 and the outer V-shaped through groove 72 are respectively provided toward the outer circumference of the motor rotor 14, and the inner V-shaped through groove 71 is semi-enclosed to enclose the outer V-shaped through groove 72.

In this embodiment, the ends of the inner V-shaped through groove 71 and the outer V-shaped through groove 72 are not connected. Each inner V-shaped through groove is formed by arranging an inner first through groove 73 and an inner second through groove 74 which are not communicated with each other in a splayed structure. Each outer V-shaped through groove is formed by arranging an outer first through groove 75 and an outer second through groove 76 which are not communicated with each other in a splayed structure. As shown in fig. 6, when the motor rotor is unfolded along the horizontal direction, the inner V-shaped through grooves form an inner sine wave structure along the horizontal direction; the outer V-shaped through grooves form an outer sine wave structure in the horizontal direction. The two sine wave structures form a magnetic field that more closely approximates a sine wave during use.

Copper wires are wound on the motor stator 13, and outgoing wires of the motor stator 13 are led out through wire outlet holes 18 on the wire outlet shaft 17 and are connected with an external controller. The on-off of the motor stator 13 is realized through the controller, and when the motor stator 13 is electrified, an alternating magnetic field is generated to the motor rotor 14. Due to the sine wave magnetic field structure, a magnetic field similar to a sine wave is generated between the motor stator 13 and the motor rotor 14 after the power is applied, so that the change of the magnetic field is more similar to a sine wave, namely, the sine wave of the driving current, and the use efficiency of electric energy is greatly improved. Because the magnetic field of the motor rotor 14 is more similar to a sine waveform, the efficiency of the controller is better when the weak magnetic treatment is carried out, the weak magnetic effect can reach about 40%, and the weak magnetic effect is greatly improved compared with 20% of the conventional weak magnetic scheme.

Example 2:

in the embodiments shown in fig. 7 and 8, a motor of a planetary reduction electric vehicle is basically the same as embodiment 1, except that: the inside of the motor rotor 14 is provided with a sine wave magnetic field structure 7, and the sine wave magnetic field structure 7 is a plurality of V-shaped through grooves which are uniformly distributed on the motor rotor 14 and can form sine waves. When in use, the magnetic steel 8 is inserted into the V-shaped through groove. The ends of the V-shaped through grooves in the embodiment are not communicated, and each V-shaped through groove is formed by arranging a first through groove 77 and a second through groove 78 which are not communicated with each other in a splayed structure. The first through groove 77 and the second through groove 78 are respectively inserted with magnetic steel. When the motor rotor is unfolded along the horizontal direction, the V-shaped through grooves form a sine wave structure in the horizontal direction.

Example 3:

in the embodiments shown in fig. 9, 10 and 11, a vehicle hub comprises a planetary reduction electric vehicle motor in embodiment 1 or embodiment 2, specifically, the motor assembly 1 is integrally connected with a planetary reduction assembly 2 of the motor assembly, and the motor assembly 1 and the planetary reduction assembly 2 are integrated inside a vehicle hub assembly 3.

The wheel hub subassembly 3 include wheel hub 31, dish brake the retainer plate 32, dish brake end cover 33, have not braked the retainer plate 34 and have not stopped end cover 35, the dish brake the retainer plate 32 connect the dish and stop end cover 33, dish brake end cover 33 and the inside planet reduction assembly installation space 4 that forms of retainer plate 32, the planet reduction assembly 2 on be connected with a dish and stop out the axle 5, the dish stop out the axle 5 through a dish and stop bearing 6 and the rotation of dish brake end cover 33 be connected to the dish stop out the axle 5 extend to the dish and stop the end cover 33 outside for install dish brake piece arresting gear, realize the braking to the electric motor car through dish brake piece arresting gear. One end of the brake-free connecting ring 34 is connected with a brake-free end cover 35, and the other end of the brake-free connecting ring 34 is connected with the wheel hub 31.

As shown in fig. 12 and 13, the planetary reduction assembly 2 includes an inner sun gear 21 connected to the motor output shaft 12, a plurality of planetary gears 2, an outer sun gear 23, a planet carrier 24, and an overrunning clutch 25, wherein the outer teeth of the inner sun gear 21 are meshed with the plurality of planetary gears 22, the plurality of planetary gears 22 are meshed with the inner teeth of the outer sun gear 23 to transmit power to the hub 31 through the outer sun gear 23, and the hub 31 and the tire thereon are driven to rotate together. The overrun clutch is a device with self-clutch function by utilizing the speed change or rotation direction change of the driving part and the driven part, and is used for realizing the rotation of the outer hub when the motor is not started or downhill.

The motor rotor 14 drives the motor output shaft 12 to rotate, and as the motor output shaft 12 is connected with the planetary reduction assembly 2, a planetary reduction gear inside the planetary reduction assembly 2 is driven to rotate, and the planetary reduction gear drives the wheel hub 31 connected with the planetary reduction gear to rotate together, so that the quick rotation of the electric vehicle wheel is realized.

The planetary reduction electric vehicle motor in the embodiment realizes the high-torque and high-rotation speed operation of electric vehicles, such as scooter and the like. Compared with a traditional inner rotor brushless BLDC direct current motor, the motor rotor with the sine wave magnetic field structure 7 is adopted, and magnetic field optimization is carried out on the part of the motor rotor, so that the change of the magnetic field is more similar to a sine waveform, namely a sine waveform of driving current, and the use efficiency of electric energy is higher. The magnetic field of the rotor is closer to a sine waveform, so that the effect of the controller is better when the weak magnetic treatment is carried out, the weak magnetic effect can reach about 40%, and is much better than 20% of the conventional weak magnetic scheme.

Meanwhile, the wheel hub with the planetary reduction electric vehicle motor integrates the planetary reduction assembly 2 and the motor assembly 1 in the wheel hub assembly 3, so that the wheel hub is compact in overall structure, small in space and integrated in design, and can meet any design requirements of different sizes, thereby meeting the use requirements of different electric vehicles and scooters.

The above-described embodiments are only some, but not all, of the embodiments of the present utility model. Meanwhile, based on the embodiments described in the present utility model, all other embodiments obtained by those skilled in the art on the basis of the technical solution of the present application should fall within the scope of protection of the present utility model without making any inventive effort.

Claims (10)

1. The utility model provides a planet speed reduction electric motor car motor which characterized in that: the planetary speed reduction assembly comprises a motor assembly body (1) which is integrated with a planetary speed reduction assembly (2), wherein the motor assembly body (1) comprises a motor rotor (14), and a sine wave magnetic field structure (7) is arranged on the motor rotor (14).

2. The planetary reduction electric vehicle motor of claim 1, wherein: the sine wave magnetic field structure (7) is a plurality of V-shaped through grooves uniformly distributed on the motor rotor (14) and used for forming a sine wave magnetic field, and magnetic steel (8) inserted into the V-shaped through grooves.

3. The planetary reduction electric vehicle motor of claim 2, wherein: the V-shaped through groove is formed by a first through groove (77) and a second through groove (78) which are not communicated with each other at the end parts; the V-shaped through groove is unfolded along the horizontal direction to form a sine wave structure.

4. The planetary reduction electric vehicle motor of claim 2, wherein: the V-shaped through grooves comprise inner side V-shaped through grooves (71) and outer side V-shaped through grooves (72) which are arranged in parallel.

5. The planetary reduction electric vehicle motor of claim 4, wherein: the inner V-shaped through groove (71) is composed of an inner first through groove (73) and an inner second through groove (74) which are not communicated with each other at the end parts; the outer V-shaped through groove (72) is composed of an outer first through groove (75) and an outer second through groove (76) which are not communicated with each other at the end parts.

6. The planetary reduction electric vehicle motor of claim 4, wherein: the inner V-shaped through groove (71) is unfolded along the horizontal direction to form an inner sine wave structure; the outer V-shaped through groove (72) is unfolded along the horizontal direction to form an outer sine wave structure; the inner sine wave structure and the outer sine wave structure form two sine wave structures which are arranged in parallel up and down.

7. The planetary reduction electric vehicle motor according to any one of claims 1 to 6, characterized in that: the motor assembly body (1) further comprises a motor shell (11), a motor output shaft (12) and a motor stator (13), wherein the motor rotor (14) is fixed on the motor output shaft (12) and drives the motor output shaft (12) to rotate, and the motor stator (13) is arranged outside the motor rotor (14) and is positioned inside the motor shell (11); one end of the motor output shaft (12) is connected with an output shaft (17) with an output hole (18), and the other end of the motor output shaft (12) is connected with the planetary reduction assembly (2).

8. A wheel hub, characterized in that: comprising a planetary reduction electric vehicle motor according to any one of claims 1 to 7.

9. The wheel hub of claim 8, wherein: the motor assembly (1) and the electric planetary reduction assembly (2) are integrated in a wheel hub assembly (3).

10. The wheel hub of claim 9, wherein: the wheel hub subassembly (3) include wheel hub (31), dish connect circle (32), dish to stop end cover (33), have not to stop and connect circle (34) and have not to stop end cover (35), dish connect circle (32) to connect dish and stop end cover (33), dish stop end cover (33) and dish to stop and connect the inside planet reduction assembly installation space (4) that forms of circle (32), wheel hub (31) inside be formed with motor installation space (9), have not to stop and connect circle (34) one end be connected with have not to stop end cover (35), the other end that has not to stop and connect circle (34) connect wheel hub (31).