CN116620009A - Wheel motor drive assembly, chassis and vehicle - Google Patents

Abstract

The present invention proposes a wheel-side motor drive assembly, a chassis and a vehicle, wherein the wheel-side motor drive assembly includes a motor assembly and a reducer assembly, the motor assembly and the reducer assembly are fixedly connected, and the motor assembly is Several suspension installation holes are provided, and the suspension installation holes are used to connect the suspension of the vehicle chassis. The motor drive assembly of this solution transmits the unsprung mass to the vehicle body through the suspension. The unsprung mass of this part refers to the mass of the motor assembly and the reducer assembly, which increases the stability of the wheel movement. Therefore, the power selection range of the hub motor is wider, and a high-speed inner rotor motor can be used.

Description

A wheel motor drive assembly, chassis and vehicle

technical field

The invention relates to the field of new energy vehicles, in particular to a wheel-side motor drive assembly, a chassis and a vehicle.

Background technique

The electric drive assembly is the "engine" of new energy equipment. It is difficult to integrate and highly systematic. Its status is second only to the battery pack. It is one of the core key components of electric drive equipment, and its importance is self-evident.

New energy vehicles usually adopt the electric drive axle structure, due to the high power and wide speed regulation requirements of the car; the electric drive axle structure generally adopts the three-in-one and multi-in-one electric drive form, that is, the electric drive axle consists of a motor, a reducer, Integration of controllers or other components; according to their use requirements, match the original traditional car chassis components, match the original chassis transmission, suspension, wheels, etc.; it is large in size, heavy in weight, complex in auxiliary systems, and high in cost; it cannot meet the requirements of high integration Demand for new energy equipment.

Hub motor drive adopts external rotor motor, which is used in the automotive field. Because it needs to integrate wheels, drive mechanisms, motor control modules, braking systems, shock absorption systems, and auxiliary lubrication and cooling systems, it is difficult to manufacture and maintain. Large; complex installation and debugging; large unsprung mass, poor vehicle handling stability; and high cost; currently, there are few mass production applications, which further restricts its optimization and improvement and technical investment.

In summary, the technical problem to be solved in this application is: how to solve the technical problem of poor handling stability of the vehicle caused by the large unsprung mass of the in-wheel motor.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention proposes a wheel-side motor drive assembly, a chassis, and a vehicle, wherein, the wheel-side motor drive assembly, the motor drive assembly of this solution transmits the unsprung mass to the vehicle body through the suspension. Part of the unsprung mass refers to the mass of the motor assembly and the reducer assembly, which increases the smoothness of the wheel movement. Therefore, the power selection range of the hub motor is wider, and a high-speed inner rotor motor can be used.

Specifically, the present invention proposes a wheel-side motor drive assembly, including a motor assembly and a reducer assembly, the motor assembly and the reducer assembly are fixedly connected, the motor assembly is provided with several suspension mounting holes, the The suspension mounting holes are used to connect the suspension of the vehicle chassis.

Preferably, the motor assembly includes a motor housing, a stator, a rotor, a rotor bracket, a motor shaft, a motor bearing and a rear cover; the stator, the rotor and the rotor bracket are all located inside the motor housing;

The motor casing includes a first motor casing and a second motor casing, the stator is fixedly arranged on the inner wall of the second motor casing; the rotor is fixedly arranged on the rotor support; the motor The shaft passes 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 housing; The rear cover is fixedly connected to the second motor casing by bolts, and the second motor casing is provided with the suspension installation hole.

Preferably, a braking assembly is provided in the space between the second motor casing and the rear cover, and the braking assembly is used for deceleration and braking and can feed back braking signals.

Preferably, the reducer assembly includes a reducer housing, a ring gear, a planetary gear set, a planet carrier, a front frame bearing, a wheel side flange and a flange bearing;

The reducer casing includes a second reducer casing and a first reducer casing, which are fixedly connected by bolts; the ring gear is fixedly arranged on the inner wall of the second reducer casing; the planetary gear set includes multiple planetary gears, each planetary gear is set on the support rod of the planetary carrier through a planetary wheel bearing; the planetary carrier includes a second planetary carrier and a first planetary carrier, and the second planetary carrier and the first planetary carrier The cylindrical protrusion of the carrier is fixed; the second planet carrier is arranged on the inner wall of the second reducer housing through the front frame bearing; the first planet carrier and the wheel side flange are respectively connected to the method The inner ring of the flange bearing is fixedly connected; the outer ring of the flange bearing is fixedly arranged on the first reducer housing; the wheel side flange is fixedly connected to the wheel hub of the wheel through bolts.

Preferably, the motor bearing includes a first motor bearing and a second motor bearing; the inner ring of the first motor bearing is fixedly connected to the motor shaft, and the outer ring of the first motor bearing is connected to the first motor shaft. The inner wall of the central hole of the casing is fixedly connected; 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 fixed with the inner wall of the central hole of the second motor casing connect.

Preferably, the brake assembly includes a brake caliper and a brake disc, the brake caliper is fixed on the outer wall of the second motor housing, and the brake disc is fixed on the motor shaft through a flat key.

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

The position sensor is disc-shaped, and is fixedly arranged on the brake caliper of the brake assembly through the sensor bracket, and the position sensor is arranged facing the end of the motor shaft;

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

Preferably, the flange bearing adopts double-row tapered roller bearings, double-row angular contact ball bearings or hub bearings to bear large axial loads.

At the same time, the present application also proposes a chassis, the suspension of which is equipped with one or more above-mentioned wheel motor drive assemblies;

Each of the wheel-side motor drive assemblies is fixedly connected to a wheel through a wheel-side flange, and the wheel on which the wheel-side motor drive assemblies are installed is the driving wheel. The wheel-side motor drive assemblies possessed by the chassis The number is the number of its driving wheels.

Further, the present application also proposes a vehicle, which includes the above-mentioned chassis.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the drawings that are required in the embodiments or the description of the prior art.

Fig. 1 is a perspective view of a perspective view of the wheel motor drive assembly proposed in this embodiment;

2 is a perspective view of another perspective of the wheel motor drive assembly proposed in this embodiment;

Fig. 3 is a sectional view of the wheel motor drive assembly in this embodiment;

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

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

Figure 6 is a perspective view of the reducer assembly in this embodiment;

Figure 7 is a sectional view of the reducer assembly in this embodiment;

Fig. 8 is the schematic diagram of the oil return hole in the present embodiment;

Fig. 9 is a schematic diagram of the position of the oil filling hole and the oil discharge hole in the present embodiment;

Fig. 10 is a schematic diagram of the positions of the vent cavity, the vent hole and the vent plug in this embodiment.

Wherein the label involved in accompanying drawing is as follows:

1-motor assembly, 2-reducer assembly;

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

201-reducer housing, 202-ring gear, 203-planetary gear set, 204-planet carrier, 205-front frame bearing, 206-wheel side flange, 207-flange bearing, 208-oil seal assembly;

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

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

10701-brake caliper, 10702-brake disc;

10901-position sensor, 10902-sensor bracket;

20101-the second reducer shell, 20102-the first reducer shell;

20301-planetary wheel, 20302-planetary wheel bearing;

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

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

1010201 - suspension mounting hole;

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

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

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 10, this embodiment proposes a wheel-side motor drive assembly, including a motor assembly 1 and a reducer assembly 2, the motor assembly 1 and the reducer assembly 2 are fixedly connected, and the motor assembly 1 is provided with several suspension installation holes 1010201, and the suspension installation holes 1010201 are used to connect the suspension of the vehicle chassis.

The technical effect of this scheme is: the motor drive assembly of this scheme transmits the unsprung mass to the vehicle body through the suspension. The unsprung mass of this part refers to the quality of the motor assembly 1 and the reducer assembly 2, which increases the stability of the wheel movement sex. As a result, the power selection range of the hub motor is wider, and a high-speed inner rotor motor can be used, as follows:

As an implementation of this 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 Both the rotor 103 and the rotor bracket 104 are located inside the motor housing 101;

The motor housing 101 includes a first motor housing 10101 and a second motor housing 10102, the stator 102 is fixed on the inner wall of the second motor housing 10102; the rotor 103 is fixed on the rotor On the 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 motor bearing The outer ring of 106 is fixedly connected to the motor housing 101; the rear cover 108 is fixedly connected to the second motor housing 10102 by bolts, and the suspension mounting hole 1010201 is set on the second motor housing 10102 .

Wherein, the first motor housing 10101 and the second motor housing 10102 can be welded or integrally formed, or can be split and fixed by bolt assemblies.

Further, a braking assembly 107 is provided in the space between the second motor housing 10102 and the rear cover 108, and the braking assembly 107 is used for deceleration and braking and can feed back braking signals.

Further, the reducer assembly 2 includes a reducer housing 201, a ring gear 202, a planetary gear set 203, a planet carrier 204, a front frame 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, both of which are fixedly connected by bolts; the ring gear 202 is fixedly arranged on the inner wall of the second reducer casing 20101; the The planetary gear set 203 includes a plurality of planetary gears 20301, and each planetary gear 20301 is arranged on the support rod of the planetary carrier 204 through a planetary wheel bearing 20302; the planetary carrier 204 includes a second planetary carrier 20401 and a first planetary carrier 20402 , the second planet carrier 20401 and the first planet carrier 20402 are fixed by cylindrical protrusions; the second planet carrier 20401 is arranged on the inner wall of the second reducer housing 20101 through the front frame bearing 205; The first planetary carrier 20402 and the wheel side flange 206 are respectively fixedly connected to the inner ring of the flange bearing 207; the outer ring of the flange bearing 207 is fixedly arranged on the first reducer housing 20102 ; The wheel side flange 206 is fixedly connected to the hub of the wheel by bolts.

In this solution, the motor assembly 1 and the reducer assembly 2 are fixedly connected by a bolt assembly, and can be independently disassembled and assembled. When the motor assembly 1 and the reducer assembly 2 are installed in combination, the motor shaft 105 of the motor assembly 1 is inserted from the center hole of the second reducer housing 20101 of the reducer assembly 2 to reach the planetary gear The center of the group 203 is then meshed with the planetary gear 20301 of the planetary gear set 203 through the teeth of the motor shaft 105, and the second reducer housing 20101 is closely attached to the first motor housing 10101 and fixed with bolts connection; at this time, the motor shaft 105 of the motor assembly 1, the ring gear 202, the planetary gear set 203 and the planetary carrier 204 of the reducer assembly 2 together form a planetary gear structure to realize variable speed transmission.

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

In addition, as an alternative to this embodiment, the motor bearing 106 of the present application may also include only one second motor bearing 10602 .

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

As an implementation of this embodiment, the brake assembly 107 includes a brake caliper 10701 and a brake disc 10702, the brake caliper 10701 is fixedly arranged on the outer wall of the second motor housing 10102, and the brake disc 10702 It is fixedly arranged on the motor shaft 105 by means of a flat key.

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

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

The position sensor 10901 is used to detect the position of the rotor 103 so as to assist the speed control of the motor.

Further, the motor assembly 1 also includes a wire harness assembly 1010, which integrates power lines and various signal lines;

The wire harness assembly 1010 realizes the waterproof and dustproof sealing function through the interference fit of the hole of the second motor housing 10102 .

As an implementation of this embodiment, the flange bearing 207 adopts double-row tapered roller bearings, double-row angular contact ball bearings or hub bearings to bear large axial loads.

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

The reducer assembly 2 also includes an oil seal assembly 208 for sealing the gear lubricating 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 arranged on the inner wall of the central hole of the second reducer housing 20101, and the second oil seal 20802 is fixedly arranged on the On the inner wall of the center hole of the first reducer housing 20102, on the rear part of the flange bearing 207.

The inside of the first reducer housing 20102 is provided with an oil return hole 2010201, one end of the oil return hole 2010201 is connected to the second oil seal 20802, and the other end is communicated with the inner space of the reducer assembly 2, so as to facilitate lubrication The oil reaches the second oil seal 20802 to ensure good lubrication of the second oil seal 20802.

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

The filling hole 2010202 is provided with a filling screw plug, which is tightened during normal operation and removed when filling lubricating oil;

Described oil discharge hole 2010203 is provided with oil discharge screw plug, tightens up during its normal work, takes off when changing lubricating oil.

Further, the second reducer housing 20101 is provided with a vent chamber 2010101 and a vent hole 2010102, and the vent hole 2010102 is provided with a vent plug 2010103, and the vent chamber 2010101 and the vent plug 2010103 are used for the deceleration The air pressure balance of the device assembly 2.

The working principle of this solution: after power on, the rotor 103 of the motor assembly 1 starts to rotate, driving the rotor bracket 104 to rotate synchronously, the rotation of the rotor bracket 104 drives the motor shaft 105 to rotate synchronously, and the motor shaft 105 rotates synchronously. The gear planetary wheel set 203 on 105 rotates, the rotation of the planetary wheel set 203 drives the rotation of the planet carrier 204, the rotation of the planet carrier 204 drives the rotation of the wheel side flange 206, and the wheel side flange 206 The rotation of the motor drives the wheels to rotate synchronously, thereby realizing the power transmission from the motor to the wheels, and also realizing the energy conversion from electric energy to kinetic energy.

At the same time, the present application also proposes a chassis, the suspension of which is equipped with one or more above-mentioned wheel motor drive assemblies;

Each of the wheel-side motor drive assemblies is fixedly connected to a wheel through the wheel-side flange 206, and the wheel on which the wheel-side motor drive assemblies are installed is the driving wheel. The number of successes is the number of its driving wheels.

Further, the present application also proposes a vehicle, which includes the above-mentioned chassis.

For those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention.

Claims (10)

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).