CN105281487A - A wheel-edge motor assembly used for vehicle driving and a vehicle using the same - Google Patents

Abstract

The invention provides a wheel motor assembly for driving a vehicle, which includes a motor housing and installed in the housing: a first motor and a first reducer, the first reducer reduces the rotation output of the first motor Finally, the output is output through the output shaft of the first reducer; the second motor and the second reducer, the second reducer decelerates the rotation output of the second motor and then outputs it through the output shaft of the second reducer; the second reducer The shafts of the first motor and the second motor are arranged in parallel, and the first motor and the second motor are installed in parallel in a "two" shape, and the output shaft of the first reducer and the output shaft of the second reducer are roughly in the same axial direction , and both of them face in opposite directions to respectively drive two opposite driving wheels; the first speed reducer and the second speed reducer are both fixed shaft speed reducers. The invention can reduce the width and height of the vehicle-mounted motor drive unit, and improve the integration degree of the vehicle chassis system.

Description

In-wheel motor assembly for vehicle drive and vehicle using in-wheel motor assembly

technical field

The invention relates to the field of vehicles, in particular to a wheel-side motor assembly for driving a vehicle and a vehicle using the wheel-side motor assembly.

Background technique

In response to the global warming trend and the non-renewability of fossil energy, new energy vehicle technologies that use rotating electric machines as the driving source of vehicles are constantly being developed and developed. For example, in front-wheel drive, rear-wheel drive, and four-wheel drive vehicles that use only rotating electrical machines, or engines and rotating electrical machines as main power, there are mechanical connections between the rotating electrical machine and the engine and transmission, or between the engine and the transmission. Or the case of installing a rotating electric machine in a transmission.

In such a vehicle, the rotating electric machine used for driving the vehicle usually exists in the vehicle chassis system as a wheel motor or hub motor. Half-shaft rotation, this design of setting a motor on the rear axle is basically satisfactory for low-power and low-torque applications, but for high-torque and high-power applications, such as load, climbing, etc. Under the circumstances, the entire drive system requires high power and high torque output characteristics. The traditional method is to increase the power of the motor, usually by increasing the volume. However, such a motor structure design with increased volume is applied in new It is more difficult for the limited and compact chassis system of energy vehicles (especially electric vehicles or hybrid vehicles). At the same time, simply relying on the increase of the motor power to increase the output driving torque of the chassis system, its output characteristics are not ideal.

Contents of the invention

The purpose of the present invention is to provide a new type of wheel-side motor assembly for vehicle driving, using dual motors to drive the two opposite driving wheels respectively to achieve high torque output, reduce the width and height of the driving unit at the same time, and improve the integration of the system .

Another object of the present invention is to provide a vehicle using the aforementioned in-wheel motor assembly.

The above objects of the invention are achieved by the technical features of the independent claims, which the dependent claims develop in an alternative or advantageous manner.

In order to achieve the above object, the present invention proposes a wheel motor assembly for driving a vehicle, including a motor housing and installed in the housing:

A first motor and a first reducer, the first motor is configured to transmit rotational motion to the input gear of the first reducer through its rotating shaft, the output gear of the first reducer is connected to the output shaft of the first reducer , the first reducer decelerates the rotation output of the first motor and outputs it through the output shaft of the first reducer;

A second motor and a second reducer, the second motor is configured to transmit rotational motion to the input gear of the second reducer through its rotating shaft, the output gear of the second reducer is connected to the output shaft of the second reducer , the second reducer decelerates the rotation output of the second motor and outputs it through the output shaft of the second reducer;

Wherein, the shafts of the first motor and the second motor are arranged in parallel, and the first motor and the second motor are installed in parallel in a "two" shape, and the output shaft of the first reducer and the output shaft of the second reducer are roughly in the same direction. The same axial direction, and the two are facing opposite directions to respectively drive the two opposite driving wheels;

Both the first reducer and the second reducer are fixed-axis reducers, and their respective output shafts at least partially protrude outside the motor housing;

The outside of the motor housing is also equipped with a breathing device, which is set to communicate with the housing chamber defined by the motor housing through an air channel interface, and the air in the housing chamber is heated or cooled When pressure changes occur, the interior volume of the breathing apparatus changes adaptively.

In a further embodiment, a heat dissipation device is provided outside the motor casing, such as a heat dissipation fin and/or a heat dissipation pipe connected with the motor casing.

In a further embodiment, a shield and/or bracket for protecting or supporting the breathing device is installed outside the motor housing, and is fixed on the outside of the motor housing.

In a further embodiment, the breathing device is configured as an air bag, which is fixed outside the motor housing and communicates with the accommodation chamber defined by the motor housing through the air channel interface.

In a further embodiment, the breathing apparatus is configured as a sleeve assembly, the sleeve assembly has a sleeve body and an elastic mechanism located in the sleeve body, and the sleeve body is connected to the electrical outlet through the air channel interface. The accommodating cavity defined by the casing is communicated, and the elastic mechanism is arranged between the sleeve body and the outer surface of the motor casing, and the sleeve assembly is arranged in the accommodating cavity in the motor casing The internal space of the sleeve body can be adaptively changed when the air is heated or cooled and the pressure changes.

It can be seen from the above technical solutions of the present invention that the wheel motor assembly for vehicle drive proposed by the present invention shares the housing and heat dissipation device, and is realized by adopting the design that two drive motors are arranged in parallel in the shape of a "two" in the axial direction. High power output realizes efficient driving of the two driving wheels, and the output shafts of the respective reducers are basically on the same axis, ensuring the consistency and smoothness of output and driving, and can reduce the width and height of the vehicle-mounted motor drive unit as a whole , improving the integration of the vehicle chassis system. In a further solution, such a wheel drive motor assembly is also equipped with a breathing device, which adaptively adjusts its internal space according to the pressure change inside the motor, so as to prevent the motor from absorbing water under negative pressure, causing water accumulation or damage.

It should be understood that all combinations of the foregoing concepts, as well as additional concepts described in more detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent. Additionally, all combinations of claimed subject matter are considered a part of the inventive subject matter of this disclosure.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description when taken in conjunction with the accompanying drawings. Other additional aspects of the invention, such as the features and/or advantages of the exemplary embodiments, will be apparent from the description below, or learned by practice of specific embodiments in accordance with the teachings of the invention.

Description of drawings

The figures are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like reference numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of the various aspects of the invention will now be described by way of example with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of an in-wheel motor assembly for driving a vehicle according to some embodiments of the present invention.

Fig. 2 is a schematic diagram of adding a breathing device on the basis of the in-wheel motor assembly for driving a vehicle in the embodiment of Fig. 1 .

Fig. 3 is a structural schematic diagram of another example of adding a breathing device to the wheel motor assembly for driving the vehicle in the embodiment of Fig. 1 .

detailed description

In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of numerous ways, since the concepts and embodiments disclosed herein are not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

As shown in FIG. 1 , according to an embodiment of the present invention, an in-wheel motor assembly for driving a vehicle includes a motor housing 100 and installed in the housing:

The first motor 120 and the first reducer 140, the first motor 120 is configured to transmit the rotational motion to the input gear 141 of the first reducer 140 through its rotating shaft 123, the output gear 142 of the first reducer 140 is connected to the The output shaft 143 of the first reducer is connected, and the first reducer 140 outputs the rotation output of the first motor 120 through the output shaft 132 of the first reducer after deceleration;

The second motor 160 and the second speed reducer 180, the second motor 160 is configured to transmit the rotational motion to the input gear 181 of the second speed reducer 180 through its rotating shaft 163, the output gear 182 of the second speed reducer 180 is connected to the second speed reducer 180 The output shaft 183 of the second speed reducer is connected, and the second speed reducer 180 decelerates the rotation output of the second motor 160 and outputs it through the output shaft 183 of the second speed reducer.

As shown in Fig. 1, the shafts (123, 163) of the first motor 120 and the second motor 160 are arranged in parallel and the first motor 120 and the second motor 160 are roughly installed in parallel in a "two" shape, and the first reducer The output shaft 143 of 140 and the output shaft 183 of the second speed reducer 180 are substantially in the same axial direction, and both face in opposite directions to respectively drive two oppositely disposed driving wheels.

Both the first reducer 140 and the second reducer 180 are fixed shaft reducers, and their respective output shafts at least partially protrude outside the motor housing 100 .

As shown in FIG. 1 , the first motor 120 further includes a motor stator 121 and a motor rotor 122 , and the rotor 122 of the first motor is configured to rotate through a rotating shaft 123 to provide power output.

The first motor 160 also includes a motor stator 161 and a motor rotor 162 , and the rotor 162 of the second motor is configured to rotate through a rotating shaft 163 to provide power output.

As shown in FIG. 1 , preferably, a cooling device 110 is provided outside the motor housing 100 , such as a cooling fin and/or a cooling pipe connected to the motor housing 100 , for cooling the motor.

As shown in FIG. 2 , in some examples, a breathing device 150 is installed outside the motor housing 100, and the breathing device 150 is configured to communicate with the housing chamber defined by the motor housing 100 through an air channel interface, And when the pressure of the air in the accommodating cavity changes when it is heated or cooled, the internal space of the breathing apparatus 150 changes adaptively.

In this way, when the motor generates heat during operation, the gas inside it expands after being heated, and when the internal pressure of the accommodation cavity in the motor housing increases, its internal space expands and discharges gas to the outside. Through the adaptive change of the breathing device 150 (internal space changes large) to adapt to the change of air pressure inside the motor casing, and at the same time, after the motor cools down, the internal air pressure decreases, through the adaptive change of the breathing device 150 (the internal space shrinks) to adapt to the inside of the motor casing The air pressure changes to prevent water from entering the motor.

In some optional examples, a shield and/or bracket for supporting the breathing device 150 is installed outside the motor housing 100 and fixed on the outside of the motor housing. For example, in the example shown in FIG. 2 , a shield 155 is fixed outside the motor housing 100 for supporting the breathing apparatus 150 .

In some examples, the aforementioned breathing device 150 is configured as an air bag, which is fixed outside the motor housing 100 and communicates with the accommodation chamber defined by the motor housing through the air channel interface.

In some other examples, as shown in FIG. 3 , the aforementioned breathing apparatus 150 is configured as a sleeve assembly, and the sleeve assembly is provided with a sleeve body 151 and an elastic mechanism 152 located in the sleeve body. The sleeve body 151 It communicates with the housing cavity defined by the air channel interface and the motor housing, and the elastic mechanism 152 is arranged between the sleeve body 151 and the outer surface of the motor housing 100, and the sleeve assembly is arranged in the The inner space of the sleeve body can be adaptively changed when the air in the accommodation cavity in the motor housing is heated or cooled and its pressure changes.

In the example shown in Fig. 3, the internal components of the motor are the same as those shown in Fig. 2, so they are not shown in the diagram.

In some other embodiments, more such breathing devices can also be arranged on the aforementioned motor casing 100, through their joint action to realize the self-adaptive change of the inner space of the motor, so as to adapt to the heating and cooling conditions of the motor. changes in internal air pressure.

It can be seen that the wheel-side motor assembly for vehicle drive proposed by the present invention adopts a design in which two drive motors are arranged in parallel in the shape of a "two" in the axial direction to achieve high power output and achieve high efficiency for the two drive wheels. Drive, and the output shafts of the respective reducers are basically on the same axis to ensure the consistency and smoothness of the output and drive; at the same time, the shared housing and heat dissipation device reduce the width and height of the drive unit and improve the system integration. In a further solution, such a wheel drive motor assembly is also equipped with a breathing device to adaptively adjust its internal space according to the pressure change inside the motor, so as to prevent the motor from absorbing water under negative pressure, causing water accumulation or damage to the motor.

According to the aforementioned embodiments disclosed in the present invention, a vehicle, especially a new energy vehicle, is also proposed, comprising the wheel-side motor assembly of one or more of the aforementioned embodiments to drive the vehicle.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (8)

1. A wheel-side motor assembly for vehicle drive, characterized in that it comprises a motor housing and is installed in the housing: A first motor and a first reducer, the first motor is configured to transmit rotational motion to the input gear of the first reducer through its rotating shaft, the output gear of the first reducer is connected to the output shaft of the first reducer , the first reducer decelerates the rotation output of the first motor and outputs it through the output shaft of the first reducer; A second motor and a second reducer, the second motor is configured to transmit rotational motion to the input gear of the second reducer through its rotating shaft, the output gear of the second reducer is connected to the output shaft of the second reducer , the second reducer decelerates the rotation output of the second motor and outputs it through the output shaft of the second reducer; Wherein, the shafts of the first motor and the second motor are arranged in parallel, and the first motor and the second motor are installed in parallel in a "two" shape, and the output shaft of the first reducer and the output shaft of the second reducer are roughly in the same direction. on the same axis, and the two are facing in opposite directions to respectively drive the two opposite driving wheels; Both the first reducer and the second reducer are fixed-axis reducers, and their respective output shafts at least partially protrude outside the motor housing; The outside of the motor housing is also equipped with a breathing device, which is set to communicate with the housing chamber defined by the motor housing through an air channel interface, and the air in the housing chamber is heated or cooled When pressure changes occur, the interior volume of the breathing apparatus changes adaptively. 2 . The in-wheel motor assembly for driving a vehicle according to claim 1 , wherein a heat dissipation device is provided outside the motor housing. 3 . 3. The wheel motor assembly for driving a vehicle according to claim 1, wherein a shield for protecting and/or supporting the breathing apparatus is installed on the outside of the motor housing, and is fixed on outside of the motor housing. 4. The wheel-side motor assembly for driving a vehicle according to claim 1, wherein a bracket for protecting and/or supporting the breathing device is installed on the outside of the motor housing, and is fixed on the the outside of the motor housing. 5. The wheel-side motor assembly for driving a vehicle according to claim 1, wherein the breathing device is configured as an air bag, which is fixed on the outside of the motor housing and passes through the air passage The interface communicates with the accommodation chamber defined by the motor housing. 6. The wheel-side motor assembly for vehicle drive according to claim 1, wherein the breathing apparatus is configured as a sleeve assembly, and the sleeve assembly is equipped with a sleeve body and a Elastic mechanism, the sleeve body communicates with the housing cavity defined by the air channel interface and the motor housing, and the elastic mechanism is arranged between the sleeve body and the motor housing, the sleeve assembly is It is arranged so that the inner space of the sleeve body can be adaptively changed when the air in the accommodation cavity in the motor housing is heated or cooled and the pressure changes. 7. The in-wheel motor assembly for driving a vehicle according to claim 1, characterized in that at least two such breathing devices are arranged on the motor housing. 8. A vehicle using the in-wheel motor assembly according to any one of claims 1-7 as a vehicle drive source.