CN211377807U

CN211377807U - Optimized hub motor

Info

Publication number: CN211377807U
Application number: CN202020229794.XU
Authority: CN
Inventors: 刘辰阳; 龚永晖
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-29
Filing date: 2020-02-29
Publication date: 2020-08-28
Anticipated expiration: 2030-02-28

Abstract

An optimized hub motor comprises a speed reducer assembly, a motor assembly, a central shaft and a hub. The motor assembly is connected with the speed reducer assembly, the speed reducer assembly is integrally embedded in the motor assembly, the speed reducer assembly is connected with one end of the central shaft, and the other end of the central shaft is connected with the wheel hub. The reducer assembly includes a two-stage planetary reducer sharing a fixed gear ring. The motor assembly is an external rotor motor, the speed reducer shared gear ring replaces a motor stator support to be embedded inside the stator, the rotor is provided with an internal gear ring to be connected with a sun gear of the first-stage planetary speed reducer, an internal spline is arranged in a planet carrier of the second-stage planetary speed reducer, one end of the planet carrier is connected with a central shaft of an external spline, and the other end of the central shaft is connected with the hub through a screw. The heat dissipation is that inside oil pipe interlude stator core carries out oil cooling, and the outside is that axial fan wheel hub carries out the forced air cooling. The design structure is compact, the installation is convenient, the high-speed rotation of the outer rotor motor is realized, the noise is low, the maintenance is easy, and the axial size is greatly shortened while the inherent characteristic that the torque can be improved by the speed reducer is realized.

Description

Optimized hub motor

Technical Field

The design is a hub motor suitable for high-torque and axial structure compact complex precision instruments and is provided with a heat dissipation mode combining oil cooling and air cooling, and belongs to the field of mechanical structure design.

Background

With the continuous development and the gradual popularization of the modularized production, the problem of the hub motor is promoted. The existing inner rotor hub motor mostly adopts speed reduction driving, and the type is large in noise, large in axial size and not easy to maintain. The traditional external rotor motor has the stator bracket inside, occupies a large space and is difficult to dissipate heat.

Disclosure of Invention

The design mainly aims at solving the defects of the prior art, and provides the hub motor which has large torque, small noise, easy maintenance, easy heat dissipation and small axial dimension.

The specific technical scheme is as follows: the optimized hub motor comprises a speed reducer assembly, a motor assembly, a central shaft and a hub. The motor assembly is connected with the speed reducer assembly, the speed reducer assembly is integrally embedded in the motor assembly, the speed reducer assembly is connected with one end of the central shaft, and the other end of the central shaft is connected with the wheel hub. The planetary gear reducer is characterized in that the reducer assembly comprises two stages of planetary reducers, each stage of planetary reducer comprises a sun gear, a planet carrier and three planet gears, and the two planet reducers share a fixed gear ring. The motor component is an external rotor motor and comprises a stator and a rotor, a speed reducer shared gear ring replaces a motor stator support to be embedded inside the stator, the rotor is provided with an internal gear ring connected with a sun gear of a first-stage planetary speed reducer of the speed reducer, an internal spline is connected in a planetary gear carrier of a second-stage planetary speed reducer, one end of the central shaft is a central shaft of an external spline, the other end of the central shaft is connected with a motor shell through a screw, and the motor shell is connected with a hub through a. Inside the motor element is embedded in the reducer element, the stator support which can provide large torque and simultaneously reduce the occupied space of the axial dimension province is large.

The stator core is virtually and evenly divided into four sectors with central angles of 90 degrees by taking the circle center of the stator core as the center, the sectors are respectively wound in the stator core gap in a penetrating and penetrating mode through the one-way S-shaped independent oil cooling oil through pipes, the pipe orifices are respectively arranged at the virtual boundary positions and form an inlet and an outlet in the axial direction, the structure and the length of the four oil pipes are the same as the winding mode, and oil is introduced to absorb heat generated by the stator core during working, so that oil cooling is realized.

The outside parcel of iron core is insulating PVC sealing layer, wraps up whole stator core and coil and the oil pipe of winding on it, forms independent space, prevents the leakage of cooling oil. The hub blade grids are designed into axial flow fan-shaped hubs through external matching, centripetal airflow is formed during starting rotation for air cooling, and internal and external double cooling is comprehensively achieved.

The optimized hub motor has the following characteristics:

1. the installation and maintenance are convenient, the structure is compact, and the axial size is reduced by adopting an embedded structure design.

2. Has large torque and high output.

3. Possesses better heat dissipation and less noise.

Optimize the advantage that the in-wheel motor design possesses:

to sum up, this design is designed for robot and precision apparatus specially, compact structure, simple to operate, realize external rotor motor high-speed rotatory, the noise is little and easy maintenance and the speed reducer can promote the inherent characteristic of moment of torsion simultaneously, greatly shortened the axial dimensions, saved the space, stator support saves and has reduced complete machine weight, built-in oil cooling and external forced air cooling have promoted the radiating effect, realize high-efficient high output, it is fixed for the single face to have changed the structure that traditional in-wheel motor two-sided is fixed, convenient assembly and dismantlement, and can dispose according to the demand is nimble, possess foresight.

Drawings

FIG. 1 is a schematic view of the overall shape (from inside to outside) of an optimized in-wheel motor

FIG. 2 is a schematic view of the overall profile (from outside to inside) of an optimized in-wheel motor

FIG. 3 is a schematic side view of an optimized in-wheel motor internal assembly

FIG. 4 is a schematic front view of an interior assembly of an optimized in-wheel motor

FIG. 5 is a partial view of the internal oil cooling heat dissipation

FIG. 6 is a schematic diagram of the working principle of internal oil cooling heat dissipation

FIG. 7 is a schematic diagram of a manner of inserting an oil pipe

FIG. 8 is a schematic view of a fan-shaped hub with air cooling and heat dissipating

Detailed Description

The overall profile of the in-wheel motor is shown in fig. 1 and 2, and the internal assembly view is shown in fig. 3 and 4.

The optimized hub motor comprises a speed reducer assembly, a motor assembly, a central shaft and a hub. The speed reducer assembly comprises two stages of planetary speed reducers, each stage of planetary speed reducer comprises a sun gear, a planet carrier and three planet gears, and the two planet speed reducers share the fixed gear ring (13). The motor component is an external rotor motor, which comprises a stator (15) and a rotor (2), a reducer shared gear ring (13) replaces a motor stator support to be embedded inside the stator (15), the rotor (2) is externally connected with a rotor frame (3) for fixing the rotor (2), an internal gear ring (4) is arranged in the rotor frame (3) and is connected with a reducer first-stage planetary reducer sun gear (5), the sun gear (5) is matched with three planet gears (6), the three planet gears are connected with a first-stage planet carrier and a second-stage sun gear (7), the first-stage planet carrier and the second-stage sun gear (7) are also matched with three planet gears (8) with different parameters, the planet gears (8) are provided with planet carriers (9), an internal spline (10) is arranged in the second-stage planetary reducer planet carrier (9) and is connected with a central shaft (11) with one end being an external spline, and the other end, the motor housing (14) is connected to the fan-shaped hub (16) by means of screws.

During operation, an internal circuit of the device enters the motor through a circuit pipeline inside the wiring layer (1) to enable the rotor (2) to start to operate, so that the rotor frame (3) is driven to rotate, the rotor frame (3) is matched with a sun gear (5) of a first-stage planetary reducer through an internal tooth gear ring (4) to transmit power to the sun gear (5) of the first-stage planetary reducer, then a first-stage planetary gear (6) matched with the rotor frame starts to rotate, so that the first-stage planetary gear frame and a second-stage sun gear (7) are driven to operate, a second-stage planetary gear (8) matched with the rotor frame starts to rotate to drive a second-stage planetary gear frame (9) to operate, the two-stage planetary reducer performs speed reduction, and shares a fixed gear ring (13) and is embedded; then, the two-stage planet carrier (9) transmits power to the central shaft (11) through the internal two splines (10), the central shaft (11) is connected with the motor shell (12) through screws to rotate, then the motor shell (14) rotates through the screw connection, finally, the movement of the fan-shaped hub (16) is realized, and centripetal wind flow is generated during the movement to perform complete machine air cooling.

The oil-cooled heat dissipation part is shown in fig. 5, fig. 6 and fig. 7, a coil (17) is wound outside a stator (15), the center of a stator core is virtually and evenly divided into four sectors with central angles of 90 degrees as the center, independent oil-cooled oil pipes (18) are respectively inserted and wound in gaps of the stator core in a one-way S shape, pipe orifices are respectively arranged at virtual boundaries and face the axial direction to form an inlet and an outlet, the structure and the length of the four oil pipes are the same as the winding mode, when oil is introduced to absorb heat generated by the stator core in working, oil flowing out of the pipe orifices (20) is accumulated in the sealing layer, when the height of the pipe orifices is reached, the oil enters the pipeline again through the pipe orifices (20) to realize circulating oil cooling, an insulating PVC sealing layer (19) is wrapped outside the core, the whole stator core is wrapped with the coil and the oil pipes wound thereon to form an independent space to prevent leakage of cooling oil, and then a hub (16) with a hub, cooling by combining the inside and the outside.

Claims

1. A hub motor comprises a speed reducer assembly, a motor assembly, a central shaft and a hub; the motor assembly is connected with the speed reducer assembly, the speed reducer assembly is integrally embedded in the motor assembly, the speed reducer assembly is connected with one end of the central shaft, and the other end of the central shaft is connected with the wheel hub; the speed reducer is characterized in that the speed reducer component comprises a two-stage planetary speed reducer and a fixed gear ring shared by the two, the motor component is an external rotor motor and comprises a stator and a rotor, the gear ring shared by the speed reducer replaces a motor stator support to be embedded inside the stator, the rotor is provided with an internal gear ring connected with a sun gear of a first-stage planetary speed reducer of the speed reducer, an internal spline is arranged in a planet carrier of a second-stage planetary speed reducer, one end of the second-stage planetary speed reducer is a central shaft of an external spline, and the other end.

2. The in-wheel motor as claimed in claim 1, wherein: the hub motor radiating part is divided into an internal oil cooling part and an external air cooling part, an insulating PVC sealing layer is wrapped outside the iron core, the whole stator iron core is wrapped with a coil and an oil pipe wound on the whole stator iron core to form an independent space, and the hub blade grid is designed to be a fan-shaped hub of axial flow air to rotate to form air cooling.

3. The in-wheel motor as claimed in claim 1, wherein: the stator core is virtually and evenly divided into four sectors with central angles of 90 degrees by internal oil cooling with the center of a circle of the stator core as the center, the sectors are respectively wound in the gap of the stator core in a one-way S-shaped mode through independent oil cooling oil pipes in an inserting mode, and the pipe orifices are respectively arranged at virtual boundary positions and face the axial direction to form an inlet and an outlet.