CN220076131U

CN220076131U - Wheel motor drive assembly, chassis and vehicle

Info

Publication number: CN220076131U
Application number: CN202321480409.9U
Authority: CN
Inventors: 何弢; 廖文龙; 刘旺太; 李孝林
Original assignee: Kuwa Environmental Technology Co ltd; Kuwa Technology Co ltd
Current assignee: Kuwa Environmental Technology Co ltd; Kuwa Technology Co ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-11-24
Anticipated expiration: 2033-06-12

Abstract

The utility model provides a wheel motor driving assembly, a chassis and a vehicle, wherein the wheel motor driving assembly comprises a motor assembly and a speed reducer assembly, the motor assembly is fixedly connected with the speed reducer assembly, a plurality of hanging mounting holes are formed in the motor assembly, and the hanging mounting holes are used for connecting hanging of the chassis of the vehicle. The motor drive assembly of this scheme transmits the unsprung mass to the automobile body through hanging, and the unsprung mass of this part refers to the mass of motor element and reduction gear subassembly, has increased the stationarity of wheel motion. Therefore, the power selection range of the hub motor is larger, and a high-speed inner rotor motor can be adopted.

Description

Wheel motor drive assembly, chassis and vehicle

Technical Field

The utility model relates to the field of new energy automobiles, in particular to a wheel-side motor driving assembly, a chassis and a vehicle.

Background

The electric drive assembly is an engine of new energy equipment, the integration difficulty is high, the systematicness is strong, and the position of the electric drive assembly is inferior to that of a battery pack; is one of the key parts of the electric drive equipment, and the importance of the key parts is self-evident.

The new energy automobile generally adopts an electric drive axle structure form, and due to the high power and wide speed regulation requirements of the automobile; the electric drive axle structure generally adopts a three-in-one and multiple-in-one electric drive mode, namely, the electric drive axle is integrated by a motor, a speed reducer, a controller or other components; according to the use requirement, the automobile chassis is matched with the original traditional automobile chassis parts, and the original chassis transmission, suspension, wheels and the like are matched; the device has the advantages of large volume, heavy weight, complex accessory system and high cost; the requirements of high-integration new energy equipment cannot be met.

The hub motor is driven by an outer rotor motor, and is used in the field of automobiles, and high integration levels such as wheels, a driving mechanism, a motor control module, a braking system, a damping system, an auxiliary lubricating system and a cooling system are required to be integrated; the manufacturing and maintenance difficulties are great; the installation and the debugging are complex; the unsprung mass is larger, and the steering stability of the whole vehicle is poor; and the cost is high; the current mass production application is less, and the optimization improvement and the technical investment are more restricted.

In summary, the technical problems to be solved by the present utility model are as follows: how to solve the technical problem that the stability of the whole vehicle control generated by large unsprung mass of the hub motor is poor.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a wheel motor driving assembly, a chassis and a vehicle, wherein the wheel motor driving assembly transmits unsprung mass to a vehicle body through suspension, and the unsprung mass of the part refers to the mass of a motor component and a speed reducer component, so that the stability of the movement of wheels is improved. Therefore, the power selection range of the hub motor is larger, and a high-speed inner rotor motor can be adopted.

Specifically, the utility model provides a wheel motor driving assembly, which comprises a motor assembly and a speed reducer assembly, wherein the motor assembly is fixedly connected with the speed reducer assembly, a plurality of suspension mounting holes are formed in the motor assembly, and the suspension mounting holes are used for connecting suspension of a vehicle chassis.

Preferably, the motor assembly comprises a motor shell, a stator, a rotor bracket, a motor shaft, a motor bearing and a rear cover; the stator, the rotor and the rotor support are all positioned inside the motor casing;

the motor casing comprises a first motor casing and a second motor casing, and the stator is fixedly arranged on the inner wall of the second motor casing; the rotor is fixedly arranged on the rotor bracket; the motor shaft penetrates through the center of the rotor bracket and is fixedly connected with the rotor bracket; the inner ring of the motor bearing is fixedly connected with the motor shaft, and the outer ring of the motor bearing is fixedly connected with the motor shell; the rear cover is fixedly connected to the second motor casing through bolts, and the second motor casing is provided with the hanging mounting holes.

Preferably, a brake assembly is arranged in a space between the second motor casing and the rear cover, and the brake assembly is used for decelerating and braking and can feed back a braking signal.

Preferably, the speed reducer assembly comprises a speed reducer shell, a gear ring, a planetary gear set, a planetary carrier, a front carrier bearing, a wheel side flange and a flange bearing;

the speed reducer shell comprises a second speed reducer shell and a first speed reducer shell which are fixedly connected through bolts; the gear ring is fixedly arranged on the inner wall of the second speed reducer shell; the planetary gear set comprises a plurality of planetary gears, and each planetary gear is arranged on a supporting rod of the planetary carrier through a planetary gear bearing; the planet carrier comprises a second planet carrier and a first planet carrier, and the second planet carrier and the first planet carrier are fixed through cylindrical protruding parts; the second planet carrier is arranged on the inner wall of the second speed reducer shell through the front carrier bearing; the first planet carrier and the wheel side flange are fixedly connected with the inner ring of the flange bearing respectively; the outer ring of the flange bearing is fixedly arranged on the first speed reducer shell; the wheel side flange is fixedly connected to a hub of the wheel through bolts.

Preferably, the motor bearings include a first motor bearing and a second motor bearing; the inner ring of the first motor bearing is fixedly connected with the motor shaft, and the outer ring of the first motor bearing is fixedly connected with the inner wall of the central hole of the first motor shell; the inner ring of the second motor bearing is fixedly connected with the motor shaft, and the outer ring of the second motor bearing is fixedly connected with the inner wall of the central hole of the second motor shell.

Preferably, the brake assembly comprises a brake caliper and a brake disc, wherein the brake caliper is fixedly arranged on the outer wall of the second motor shell, and the brake disc is fixedly arranged on the motor shaft through a flat key.

Preferably, the motor assembly further comprises a sensor assembly comprising a position sensor and a sensor bracket;

the position sensor is disc-shaped and is fixedly arranged on a brake caliper of the brake assembly through the sensor bracket, and the position sensor is arranged opposite to the end part of the motor shaft;

the position sensor is used for detecting the position of the rotor so as to assist the speed regulation control of the motor.

Preferably, the flange bearing adopts a double-row tapered roller bearing, a double-row angular contact ball bearing or a hub bearing so as to bear large axial load.

Meanwhile, the utility model also provides a chassis, and one or more wheel motor driving assemblies are arranged on the suspension of the chassis;

each wheel-side motor driving assembly is fixedly connected with one wheel through a wheel-side flange, the wheels provided with the wheel-side motor driving assemblies are driving wheels, and the number of the wheel-side motor driving assemblies possessed by the chassis is the number of the driving wheels.

Furthermore, the utility model also provides a vehicle, which comprises the chassis.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a perspective view of a wheel motor drive assembly according to one embodiment;

FIG. 2 is a perspective view of another view of the wheel motor drive assembly according to the present embodiment;

FIG. 3 is a cross-sectional view of the wheel motor drive assembly of the present embodiment;

fig. 4 is a perspective view of the motor assembly in the present embodiment;

fig. 5 is a sectional view of the motor assembly in the present embodiment;

fig. 6 is a perspective view of the decelerator assembly in the present embodiment;

fig. 7 is a sectional view of the decelerator assembly in the present embodiment;

fig. 8 is a schematic view of an oil return hole in the present embodiment;

fig. 9 is a schematic view showing the positions of the oil filler and drain holes in the present embodiment;

figure 10 is a schematic illustration of the location of the vent chamber, vent hole and vent plug in this embodiment.

Wherein reference numerals are as follows:

1-a motor assembly, 2-a decelerator assembly;

101-motor housing, 102-stator, 103-rotor, 104-rotor bracket, 105-motor shaft, 106-motor bearing, 107-brake assembly, 108-rear cover, 109-sensor assembly, 1010-harness assembly;

201-a speed reducer shell, 202-a gear ring, 203-a planetary gear set, 204-a planet carrier, 205-a front carrier bearing, 206-a wheel side flange, 207-a flange bearing and 208-an oil seal assembly;

10101-a first motor casing, 10102-a second motor casing;

10601-first motor bearing, 10602-second motor bearing;

10701-brake caliper, 10702-brake disc;

10901-position sensor, 10902-sensor holder;

20101-a second reducer casing, 20102-a first reducer casing;

20301-planet wheels, 20302-planet wheel bearings;

20401-a second planet carrier, 20402-a first planet carrier;

20801-first oil seal, 20802-second oil seal;

1010201-hanging mounting holes;

2010101-vent lumen, 2010102-vent hole, 2010103-vent plug;

2010201-oil return hole, 2010202-oil filling hole, 2010203-oil drain hole.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 to 10, this embodiment proposes a wheel motor drive assembly, including motor assembly 1 and reduction gear assembly 2, motor assembly 1 and reduction gear assembly 2 fixed connection, be equipped with a plurality of on motor assembly 1 and hang mounting hole 1010201, hang mounting hole 1010201 is used for connecting the suspension of vehicle chassis.

The technical effect of this scheme lies in: the motor drive assembly of this scheme transmits the unsprung mass to the automobile body through hanging, and the unsprung mass of this part refers to the mass of motor assembly 1 and reduction gear assembly 2, has increased the stationarity of wheel motion. Therefore, the power selection range of the hub motor is larger, and a high-speed inner rotor motor can be adopted, and the method specifically comprises the following steps:

as one implementation of the present embodiment, the motor assembly 1 includes a motor housing 101, a stator 102, a rotor 103, a rotor bracket 104, a motor shaft 105, a motor bearing 106, and a rear cover 108; the stator 102, the rotor 103 and the rotor bracket 104 are all located inside the motor casing 101;

the motor casing 101 comprises a first motor casing 10101 and a second motor casing 10102, and the stator 102 is fixedly arranged on the inner wall of the second motor casing 10102; the rotor 103 is fixedly arranged on the rotor bracket 104; the motor shaft 105 passes through the center of the rotor bracket 104 and is fixedly connected with the rotor bracket 104; the inner ring of the motor bearing 106 is fixedly connected with the motor shaft 105, and the outer ring of the motor bearing 106 is fixedly connected with the motor casing 101; the rear cover 108 is fixedly connected to the second motor casing 10102 through bolts, and the second motor casing 10102 is provided with the suspension mounting hole 1010201.

The first motor casing 10101 and the second motor casing 10102 may be welded or integrally formed, or may be split and fixed by a bolt assembly.

Further, a brake assembly 107 is disposed in a space between the second motor housing 10102 and the rear cover 108, and the brake assembly 107 is used for decelerating and braking and can feed back a braking signal.

Further, the speed reducer assembly 2 includes a speed reducer case 201, a ring gear 202, a planetary gear set 203, a carrier 204, a front carrier bearing 205, a wheel side flange 206, and a flange bearing 207;

the reducer casing 201 includes a second reducer casing 20101 and a first reducer casing 20102, which are fixedly connected by bolts; the gear ring 202 is fixedly arranged on the inner wall of the second reducer casing 20101; the planetary gear set 203 comprises a plurality of planetary gears 20301, and each planetary gear 20301 is arranged on a supporting rod of the planetary carrier 204 through a planetary gear bearing 20302; the planet carrier 204 includes a second planet carrier 20401 and a first planet carrier 20402, the second planet carrier 20401 and the first planet carrier 20402 being fixed by cylindrical projections; the second planet carrier 20401 is provided on the inner wall of the second reducer case 20101 by the front carrier bearing 205; the first planet carrier 20402 and the wheel-side flange 206 are fixedly connected with an inner ring of the flange bearing 207, respectively; the outer ring of the flange bearing 207 is fixedly disposed on the first reducer case 20102; the wheel side flange 206 is fixedly attached to the hub of the wheel by bolts.

In this scheme, motor assembly 1 and reduction gear subassembly 2 pass through bolt assembly fixed connection, can independently take apart and the combination installation. When the motor assembly 1 and the speed reducer assembly 2 are assembled, the motor shaft 105 of the motor assembly 1 is inserted into the center hole of the second speed reducer shell 20101 of the speed reducer assembly 2 to reach the center of the planetary gear set 203, and then is meshed with the planetary gears 20301 of the planetary gear set 203 through the teeth of the motor shaft 105, and meanwhile the second speed reducer shell 20101 and the first motor shell 10101 are tightly attached and fixedly connected through bolts; at this time, the motor shaft 105 of the motor assembly 1, the gear ring 202, the planetary gear set 203 and the planet carrier 204 of the reducer assembly 2 together form a planetary gear structure, so as to realize variable speed transmission.

As one implementation of the present embodiment, the motor bearing 106 includes a first motor bearing 10601 and a second motor bearing 10602; an inner ring of the first motor bearing 10601 is fixedly connected with the motor shaft 105, and an outer ring of the first motor bearing 10601 is fixedly connected with an inner wall of a central hole of the first motor housing 10101; the inner ring of the second motor bearing 10602 is fixedly connected with the motor shaft 105, and the outer ring of the second motor bearing 10602 is fixedly connected with the inner wall of the central hole of the second motor housing 10102.

In addition, as an alternative to the present embodiment, only one second motor bearing 10602 may be included in the motor bearing 106 of the present utility model.

Further, an assembling space is recessed in the middle of the first motor housing 10101, and the motor shaft 105 extends into the assembling space.

As an implementation manner of this embodiment, the brake assembly 107 includes a brake caliper 10701 and a brake disc 10702, the brake caliper 10701 is fixedly disposed on an outer wall of the second motor casing 10102, and the brake disc 10702 is fixedly disposed on the motor shaft 105 through a flat key.

As an implementation of the present embodiment, the motor assembly 1 further includes a sensor assembly 109, the sensor assembly 109 including a position sensor 10901 and a sensor holder 10902;

the position sensor 10901 is disc-shaped, and is fixedly arranged on a brake caliper 10701 of the brake assembly 107 through the sensor bracket 10902, and the position sensor 10901 is arranged opposite to the end part of the motor shaft 105;

the position sensor 10901 is used to detect the position of the rotor 103 and thereby assist in motor speed regulation control.

Further, the motor assembly 1 further includes a harness assembly 1010 that integrates power lines and various kinds of signal lines;

the wire harness assembly 1010 achieves a waterproof and dustproof sealing function through hole interference fit of the second motor casing 10102.

As an embodiment of the present embodiment, the flange bearing 207 is a double row tapered roller bearing, a double row angular contact ball bearing, or a hub bearing, so as to bear a large axial load.

Further, the motor casing 101 and the reducer casing 201 are both made of aluminum alloy.

The reducer assembly 2 further comprises an oil seal assembly 208 for sealing gear lubrication oil;

the oil seal assembly 208 includes a first oil seal 20801 and a second oil seal 20802, the first oil seal 20801 is fixedly disposed on an inner wall of a center hole of the second reducer casing 20101, and the second oil seal 20802 is fixedly disposed on an inner wall of the center hole of the first reducer casing 20102 and on a rear portion of the flange bearing 207.

The inside of first reduction gear shell 20102 is provided with oil gallery 2010201, the one end of oil gallery 2010201 with second oil blanket 20802 is connected, and its other end communicates with the inner space of reduction gear assembly 2 to make things convenient for lubricating oil to reach second oil blanket 20802 department, guarantees the good lubrication of second oil blanket 20802.

Further, the first reducer casing 20102 is provided with an oil filling hole 2010202 and an oil drain hole 2010203, which are respectively used for filling and replacing gear lubricating oil of the reducer assembly 2;

a refueling screw plug is arranged in the refueling hole 2010202, and is tightened when in normal operation and taken down when being filled with lubricating oil;

an oil drain screw plug is arranged in the oil drain hole 2010203, and is tightened during normal operation and taken down during the replacement of lubricating oil.

Further, the second reducer case 20101 is provided with a ventilation cavity 2010101 and a ventilation hole 2010102, and the ventilation hole 2010102 is provided with a ventilation plug 2010103 therein, and the ventilation cavity 2010101 and the ventilation plug 2010103 are used for air pressure balancing of the reducer assembly 2.

The working principle of the scheme is as follows: after power is applied, the rotor 103 of the motor assembly 1 starts to rotate, the rotor support 104 is driven to synchronously rotate, the rotation of the rotor support 104 drives the motor shaft 105 to synchronously rotate, the gear planetary gear set 203 on the motor shaft 105 rotates, the rotation of the planetary gear set 203 drives the planet carrier 204 to rotate, the rotation of the planet carrier 204 drives the wheel side flange 206 to rotate, and the rotation of the wheel side flange 206 drives the wheel to synchronously rotate, so that power transmission from the motor to the wheel is realized, and energy conversion from electric energy to kinetic energy is also realized.

each wheel-side motor driving assembly is fixedly connected with one wheel through a wheel-side flange 206, the wheels provided with the wheel-side motor driving assemblies are driving wheels, and the number of the wheel-side motor driving assemblies possessed by the chassis is the number of the driving wheels.

It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. The utility model provides a wheel limit motor drive assembly, its characterized in that includes motor element (1) and reduction gear subassembly (2), motor element (1) and reduction gear subassembly (2) fixed connection, be equipped with a plurality of on motor element (1) and hang mounting hole (1010201), hang mounting hole (1010201) and be used for connecting the suspension of vehicle chassis.

2. The rim motor drive assembly according to claim 1, wherein the motor component (1) comprises a motor housing (101), a stator (102), a rotor (103), a rotor support (104), a motor shaft (105), a motor bearing (106) and a rear cover (108); the stator (102), the rotor (103) and the rotor bracket (104) are all positioned inside the motor casing (101);

the motor casing (101) comprises a first motor casing (10101) and a second motor casing (10102), and the stator (102) is fixedly arranged on the inner wall of the second motor casing (10102); the rotor (103) is fixedly arranged on the rotor bracket (104); the motor shaft (105) penetrates through the center of the rotor bracket (104) and is fixedly connected with the rotor bracket (104); the inner ring of the motor bearing (106) is fixedly connected with the motor shaft (105), and the outer ring of the motor bearing (106) is fixedly connected with the motor shell (101); the rear cover (108) is fixedly connected to the second motor casing (10102) through bolts, and the second motor casing (10102) is provided with the hanging mounting holes (1010201).

3. The wheel side motor drive assembly according to claim 2, wherein a brake assembly (107) is provided in a space between the second motor housing (10102) and the rear cover (108), the brake assembly (107) being adapted for a slow down brake and being adapted to feed back a brake signal.

4. A wheel side motor drive assembly according to claim 3, characterized in that the reducer component (2) comprises a reducer housing (201), a gear ring (202), a planetary gear set (203), a planet carrier (204), a front carrier bearing (205), a wheel side flange (206) and a flange bearing (207);

the speed reducer shell (201) comprises a second speed reducer shell (20101) and a first speed reducer shell (20102), and the second speed reducer shell and the first speed reducer shell are fixedly connected through bolts; the gear ring (202) is fixedly arranged on the inner wall of the second speed reducer shell (20101); the planetary gear set (203) comprises a plurality of planetary gears (20301), and each planetary gear (20301) is arranged on a supporting rod of the planetary carrier (204) through a planetary gear bearing (20302); the planet carrier (204) comprises a second planet carrier (20401) and a first planet carrier (20402), the second planet carrier (20401) and the first planet carrier (20402) being fixed by cylindrical protrusions; the second planet carrier (20401) is arranged on the inner wall of the second speed reducer shell (20101) through the front carrier bearing (205); the first planet carrier (20402) and the wheel-side flange (206) are respectively and fixedly connected with the inner ring of the flange bearing (207); an outer ring of the flange bearing (207) is fixedly arranged on the first speed reducer shell (20102); the wheel-side flange (206) is fixedly connected to the hub of the wheel by means of bolts.

5. The rim motor drive assembly of claim 4, wherein the motor bearing (106) comprises a first motor bearing (10601) and a second motor bearing (10602); the inner ring of the first motor bearing (10601) is fixedly connected with the motor shaft (105), and the outer ring of the first motor bearing (10601) is fixedly connected with the inner wall of the central hole of the first motor shell (10101); the inner ring of the second motor bearing (10602) is fixedly connected with the motor shaft (105), and the outer ring of the second motor bearing (10602) is fixedly connected with the inner wall of the central hole of the second motor shell (10102).

6. The wheel side motor drive assembly according to claim 4, wherein the brake assembly (107) comprises a brake caliper (10701) and a brake disc (10702), the brake caliper (10701) is fixedly arranged on the outer wall of the second motor casing (10102), and the brake disc (10702) is fixedly arranged on the motor shaft (105) through a flat key.

7. The wheel-side motor drive assembly of claim 6, wherein the motor assembly (1) further comprises a sensor assembly (109), the sensor assembly (109) comprising a position sensor (10901) and a sensor bracket (10902);

the position sensor (10901) is disc-shaped and is fixedly arranged on a brake caliper (10701) of the brake assembly (107) through the sensor bracket (10902), and the position sensor (10901) is arranged opposite to the end part of the motor shaft (105);

the position sensor (10901) is used for detecting the position of the rotor (103) so as to assist in speed regulation control of the motor.

8. The rim motor drive assembly according to claim 4, characterized in that the flange bearing (207) is a double row tapered roller bearing, a double row angular contact ball bearing or a hub bearing.

9. A chassis having one or more wheel motor drive assemblies as claimed in any one of claims 1 to 8 mounted on a suspension of the chassis;

each wheel side motor driving assembly is fixedly connected with one wheel through a wheel side flange (206), the wheels provided with the wheel side motor driving assemblies are driving wheels, and the number of the wheel side motor driving assemblies on the chassis is consistent with that of the driving wheels.

10. A vehicle comprising a chassis according to claim 9.