KR102029846B1 - Drive system having coupling structure of motor and reducer - Google Patents

Abstract

Disclosed is a drive system with an all-in-one drive motor and reducer. According to an exemplary embodiment of the present invention, the drive system with an all-in-one drive motor and reducer is configured to be integrated with a drive motor having a motor unit and a reducer having a reduction unit. The drive motor includes a motor housing accommodating the motor unit. The reducer includes a reducer housing accommodating the reduction unit and coupled with the motor housing. An inverter mounting unit for mounting an inverter can be integratedly provided in the reducer housing.

Description

DRIVE SYSTEM HAVING COUPLING STRUCTURE OF MOTOR AND REDUCER}

An embodiment of the present invention relates to an electric power drive vehicle, and more particularly to a drive system and a drive system integrated with a drive motor applied to the electric power drive vehicle.

Recently, pure electric powered eco-friendly vehicles such as electric vehicles or fuel cell vehicles have attracted attention. An electric motor (hereinafter referred to as a drive motor) is mounted on such an electric power-friendly vehicle as a driving source for obtaining rotational power by electric energy instead of an internal combustion engine such as an existing engine.

The drive motor used as a power source of the eco-friendly vehicle includes a motor housing, a stator fixedly installed inside the motor housing, and a rotor disposed with a predetermined gap with the stator and rotating about a rotating shaft as a drive shaft.

On the other hand, the drive motor is connected to a reducer for increasing the torque by reducing the rotation speed of the rotary shaft. Previously, the drive motor and the reducer were manufactured as separate parts, but recently, the number of cases in which the drive motor and the reducer are integrally formed is increasing.

Here, the reducer is provided with a reducer case, which is fastened to the front cover of the drive motor via the reducer case, and may be connected through a rotating shaft of the drive motor.

Such a drive motor and reducer integrated structure has advantages such as weight reduction, cost reduction, and package reduction of the drive system, and can also be expected to have the simplicity of AS.

Matters described in this Background section are intended to enhance the understanding of the background of the invention, and may include matters other than the prior art already known to those skilled in the art.

Embodiments of the present invention are advantageous to reduce the overall length of a drive motor, and to provide a drive system of a drive motor and a reducer integrated to improve the cooling efficiency of the drive motor and to cope with package of an electric power drive vehicle.

According to an embodiment of the present invention, a driving motor and a reduction gear integrated driving system include a driving motor having a motor unit and a reduction gear having a reduction unit as an integrated type, and the driving motor includes a motor housing accommodating the motor unit. The speed reducer may include a speed reducer housing accommodating the speed reducer unit and coupled to the motor housing, and the speed reducer housing may be integrally provided with an inverter mounting unit for mounting an inverter.

In addition, in the drive system of the drive motor and reducer integrated according to an embodiment of the present invention, the inverter mounting portion electrically connects the motor unit and the inverter, and a current applying unit for applying an alternating current to the motor unit. Can be mounted.

In addition, in the drive system of the drive motor and reducer integrated according to an embodiment of the present invention, the inverter mounting portion is formed to protrude in the reducer housing and the fastening boss provided to be fastened to the inverter housing of the inverter, and the reducer housing It may include a mounting boss protruding in the current applying unit is removably provided and is provided to be fastened to the current applying unit.

In addition, the drive system of the drive motor and reducer integrated type according to an embodiment of the present invention, the drive motor having a motor unit and the reducer having a reduction unit are integrally formed, the drive motor is a motor housing for accommodating the motor unit The speed reducer may include a speed reducer housing accommodating the speed reducer unit and coupled to the motor housing, and the speed reducer housing may include a sensor unit configured to detect a rotational speed and an absolute position of the rotor of the motor unit. .

In addition, in the driving system integrated with the drive motor and the reducer according to an embodiment of the present invention, the sensor unit may include a resolver.

In addition, in the driving system of the drive motor and reducer integrated according to an embodiment of the present invention, the resolver is disposed with a resolver stator coupled to the reducer housing and a predetermined gap inside the resolver stator, It may include a resolver rotor mounted to the end of the rotating shaft of the motor unit.

In addition, the drive system of the drive motor and reducer integrated type according to an embodiment of the present invention, the drive motor having a motor unit and the reducer having a reduction unit are integrally formed, the drive motor is a motor housing for accommodating the motor unit The speed reducer includes a speed reducer housing accommodating the speed reducer unit and coupled to the motor housing. The motor housing includes a cooling medium flow path for cooling the motor unit as a cooling medium. A branching portion is formed to branch from the flow passage, and the branching portion may be equipped with a temperature sensor for detecting the temperature of the cooling medium.

In addition, in the driving system integrated with the drive motor and the reducer according to an embodiment of the present invention, the motor housing may be provided with a cooling medium inlet connected to the cooling medium flow passage.

In addition, in the driving system integrated with the drive motor and the reducer according to the embodiment of the present invention, the branch portion may be disposed close to the inlet of the cooling medium.

In addition, the drive system of the drive motor and reducer integrated type according to an embodiment of the present invention, the drive motor having a motor unit and the reducer having a reduction unit are integrally formed, the drive motor is a motor housing for accommodating the motor unit The speed reducer includes a speed reducer housing accommodating the speed reducer unit and coupled to the motor housing, wherein the speed reducer housing is integrally provided with an inverter mounting unit for mounting an inverter, and the inverter mounting unit includes the motor unit and A current applying unit for electrically connecting the inverter and applying an alternating current to the motor unit is mounted, and the reducer housing includes a sensor unit as a resolver for detecting the rotational speed and the absolute position of the rotor of the motor unit. Can be.

Furthermore, the drive system of the drive motor and reducer integrated type according to an embodiment of the present invention comprises a drive motor having a motor unit and a reducer having a reduction unit integrally, and the drive motor includes a motor housing accommodating the motor unit. The speed reducer includes a speed reducer housing accommodating the speed reducer unit and coupled to the motor housing, wherein the speed reducer housing is integrally provided with an inverter mounting unit for mounting an inverter, and the inverter mounting unit includes the motor unit and A current applying unit for electrically connecting the inverter and applying an alternating current to the motor unit is mounted, and a cooling medium flow passage for cooling the motor unit as a cooling medium is formed in the motor housing. A branch portion is formed to branch from the passage, and the branch portion A temperature sensor for detecting the temperature of the cooling medium may be mounted.

In addition, the drive system of the drive motor and reducer integrated type according to an embodiment of the present invention, the drive motor having a motor unit and the reducer having a reduction unit are integrally formed, the drive motor is a motor housing for accommodating the motor unit The speed reducer includes a speed reducer housing accommodating the speed reducer unit and coupled to the motor housing, and the speed reducer housing includes a sensor unit as a resolver for detecting a rotational speed and an absolute position of the rotor of the motor unit. A cooling medium flow passage for cooling the motor unit as a cooling medium is formed in the motor housing, a branching portion is formed in the cooling medium flow passage, and the branching portion is configured to detect the temperature of the cooling medium. A temperature sensor can be mounted.

Furthermore, the drive system of the drive motor and reducer integrated type according to an embodiment of the present invention, the drive motor having a motor unit and the reducer having a reduction unit are integrally formed, wherein the drive motor is a motor accommodating the motor unit And a reduction gear housing accommodating the reduction gear unit and coupled to the motor housing, wherein the reduction gear housing includes an inverter mounting portion for mounting an inverter, and the inverter mounting portion includes the motor unit. A current applying unit for electrically connecting the inverter to the motor unit and applying an alternating current to the motor unit, and the reducer housing includes a sensor unit as a resolver for detecting the rotational speed and the absolute position of the rotor of the motor unit. The motor housing includes the motor unit as a cooling medium. The cooling medium flow passage for cooling the cooling medium is formed, the branching portion is formed in the cooling medium flow passage is formed, the branch portion may be equipped with a temperature sensor for detecting the temperature of the cooling medium.

Embodiments of the present invention can reduce the overall length of the drive motor, it is advantageous to the package package of the vehicle due to the reduction of the full length of the drive motor, it is possible to reduce the weight and cost.

In addition, the effects that can be obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to an embodiment of the present invention will be disclosed in the detailed description to be described later.

Since these drawings are for reference in describing exemplary embodiments of the present invention, the technical spirit of the present invention should not be construed as being limited to the accompanying drawings.
1 is a perspective view illustrating a driving system of a driving motor and a reduction gear integrated according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a driving system of a driving motor and a reduction gear integrated according to an embodiment of the present invention.
3 and 4 are diagrams illustrating an inverter mounting structure applied to a driving system integrated with a drive motor and a reducer according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a resolver mounting structure applied to a driving system of a driving motor and a reduction gear integrated according to an embodiment of the present invention.
FIG. 6 is a view illustrating a cooling structure and a temperature sensor mounting structure applied to a driving system integrated with a drive motor and a reducer according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to those illustrated in the drawings, and the thicknesses are enlarged to clearly express various parts and regions.

In the following detailed description, the names of the configurations are divided into first, second, and the like in order to distinguish them in the same relationship, and the description is not necessarily limited to the order in the following description.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In addition, the terms "... unit", "... means", "... part", "... member", etc. described in the specification refer to a unit of a comprehensive configuration that performs at least one function or operation. it means.

1 is a perspective view illustrating a driving system integrated with a drive motor and a reducer according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a driving system with a drive motor and a reducer integrated according to an embodiment of the present invention.

1 and 2, the driving system 100 of the driving motor and the reduction gear integrated according to an embodiment of the present invention may be applied to a pure electric power environment-friendly vehicle such as an electric driving vehicle or a fuel cell vehicle. Furthermore, the driving system 100 of the driving motor and the reduction gear integrated according to the embodiment of the present invention may be applied to a hybrid eco-friendly vehicle using driving power and electric power of the engine.

Such a drive system 100 is integrally formed with a drive motor 10 as an electric motor that generates a rotational driving force, and a reducer 20 for increasing torque by reducing the rotation speed of the drive motor 10. Hereinafter, "end" may be defined as either end, or may be defined as a portion including the end.

The driving motor 10 applied to the embodiment of the present invention may include, for example, a permanent magnet synchronous motor (PMSM), and a field wound linear synchronous motor (WRSM). It may also include.

The driving motor 10 as described above includes a motor housing 11 and a motor unit 13 installed inside the motor housing 11. The motor unit 13 includes a stator 15 fixedly installed inside the motor housing 11 and a rotor which is disposed with a predetermined gap with the stator 15 and rotates about a rotating shaft 17 as a drive shaft. It contains (19). Here, the front end of the rotary shaft 17 is rotatably supported by the first bearing B1 on the front side of the motor housing 11.

On the other hand, the reducer 20 is integrally formed with the drive motor 10 is configured to reduce the rotational speed transmitted from the rotary shaft 17 of the drive motor 10. The speed reducer 20 includes a speed reducer housing 21 and a speed reducer unit 23 installed inside the speed reducer housing 21.

The reducer housing 21 is coupled to the rear side of the motor housing 11, and is coupled to the rear side of the motor housing 11 through fastening means such as bolts.

In addition, the reduction unit 23 is configured to substantially reduce the rotation speed transmitted from the rotation shaft 17 of the drive motor 10, and an output shaft coupled to the rear end of the rotation shaft 17 in a spline manner. And a reduction gear group 27 such as an intermediate gear, an output gear, a parking gear, and the like connected to the output shaft 25. Since the configuration of the deceleration unit 23 is well known in the art, a detailed description of the configuration will be omitted herein.

Here, the front end of the output shaft 25 is rotatably supported by the second bearing B2 on the front side of the reducer housing 21, and the rear side end of the output shaft 25 on the rear side of the reducer housing 21. Is rotatably supported by the third bearing B3.

The drive system 100 of the driving motor and the reduction gear integrated according to the embodiment of the present invention as described above is advantageous in reducing the overall length of the driving motor 10, and improves the cooling efficiency of the driving motor 10 and the electric power driving vehicle. It is made of a structure that is advantageous for the package correspondence.

3 and 4 are diagrams illustrating an inverter mounting structure applied to a driving system of a driving motor and a reduction gear integrated according to an embodiment of the present invention.

1 to 4, the driving system 100 of the driving motor and the reduction gear integrated according to an embodiment of the present invention may include an inverter 30 installed in the reduction gear housing 21.

The inverter 30 converts the DC power of the vehicle battery unit into AC power and supplies the AC power to the motor unit 13 of the driving motor 10, and is electrically connected to the motor unit 13. do. The inverter 30 includes an inverter housing 31 constituting an inverter element or the like therein.

The inverter 30 is mounted to the reducer housing 21 through the inverter housing 31. For this purpose, the reducer housing 21 is an inverter mounting part 51 for mounting the inverter 30. ) Are integrally formed. The inverter mounting portion 51 is provided on the upper surface side of the reducer housing 21.

Furthermore, the inverter mounting unit 51 is equipped with a current applying unit 33 for applying an alternating current to the motor unit 13 while electrically connecting the motor unit 13 and the inverter 30.

The current applying unit 33 is detachably provided to the inverter mounting portion 51 in the reduction gear housing 21. The current applying unit 33 is provided as a terminal assembly for electrically connecting the inverter element of the motor unit 13 and the inverter 30, since it is a common structure well known in the art, more of the structure herein Detailed description will be omitted.

Here, the inverter mounting unit 51 as described above is used for mounting the fastening boss 53 for mounting the inverter housing 31 to the reducer housing 21, and for mounting the current application unit 33 to the reducer housing 21. The mounting boss 55 is included.

The plurality of fastening bosses 53 are integrally formed to protrude from the upper surface of the reducer housing 21 and provided to be fastened to the inverter housing 31 through fastening means such as bolts.

In addition, the mounting boss 55 forms a mounting hole 57 into which the current application unit 33 can be inserted, and is formed to protrude integrally in a substantially square shape on the upper surface of the reducer housing 21, and is fastened like a bolt. It is provided to be fastened to the current applying unit 33 through the means.

Therefore, in the embodiment of the present invention, since the inverter mounting portion 51 for mounting the inverter housing 31 and the current applying unit 33 is configured in the reducer housing 21 as described above, the drive motor 10 and the reducer ( In the assembly of 20), the ease of assembly can be ensured.

In addition, in the embodiment of the present invention, since the inverter mounting unit 51 is configured in the reduction gear housing 21, the overall length of the driving motor 10 can be reduced, and the package of the vehicle due to the reduction in the total length of the driving motor 10 is provided. It is advantageous in response and can save weight and cost.

5 is a diagram illustrating a resolver mounting structure applied to a driving system of a driving motor and a reduction gear integrated according to an embodiment of the present invention.

Referring to FIG. 5 together with FIGS. 1 and 2, the driving system 100 of the driving motor and the reduction gear integrated according to the embodiment of the present invention includes a rotor 19 in the motor unit 13 of the driving motor 10. It includes a sensor unit 61 for detecting the rotational speed and absolute position of the.

The sensor part 61 is provided on the side of the second bearing B2 mentioned above on the front side of the reducer housing 21. The sensor unit 61 includes a resolver 63 in the embodiment of the present invention. This resolver 63 includes a resolver stator 65 and a resolver rotor 67.

The resolver stator 65 is coupled to the second bearing B2 side at the front side of the reducer housing 21. The resolver stator 65 is provided in a ring form (or disc form) having a set width.

In addition, the resolver rotor 67 is disposed to have a predetermined gap with the resolver stator 65 inside the resolver stator 65, and at the end of the rear side rotation shaft 17 of the motor unit 13. It is fixedly mounted.

Since the remaining components of the resolver stator 65 and the resolver rotor 67 as described above are formed as resolver assemblies of a known technique well known in the art, a detailed description thereof will be omitted herein. .

Accordingly, in the embodiment of the present invention, as the sensor unit 61 as the resolver 63 is mounted on the reduction gear housing 21 as described above, the overall length of the driving motor 10 can be reduced, and the driving motor 10 can be reduced. It is advantageous for the vehicle's package response due to the reduction of the overall length, and can reduce weight and cost.

6 is a view illustrating a cooling structure and a temperature sensor mounting structure applied to a driving system of a driving motor and a reduction gear integrated according to an embodiment of the present invention.

Referring to FIG. 6 together with FIGS. 1 and 2, the driving system 100 of the driving motor and the reduction gear integrated according to the embodiment of the present invention is for cooling the motor unit 13 of the driving motor 10 as a cooling medium. The cooling medium flow passage 71 is formed inside the motor housing 11.

Herein, the interior of the motor housing 11 means the interior of the housing wall, not the inner space of the motor housing 11. The cooling medium flow passage 71 is also known in the art as a cooling channel, and may coolant or cooling oil flow as a cooling medium. The cooling medium flow passage 71 is provided at the front side of the motor housing 11.

The motor housing 11 includes a cooling medium inlet 73 for introducing a cooling medium into the cooling medium flow passage 71 and a cooling medium outlet for outflow of the cooling medium from the cooling medium flow passage 71. It includes (75).

Furthermore, in the embodiment of the present invention, the motor housing 11 further includes a branch 77 branched from the cooling medium flow passage 71. The branch portion 77 is provided as a protruding conduit connected to the cooling medium flow passage 71 and is disposed in the motor housing 11 to be close to the cooling medium inflow portion 73.

Furthermore, in the embodiment of the present invention, the branch 77 is equipped with a temperature sensor 81 for detecting the temperature of the cooling medium. The temperature sensor 81 may be formed of a temperature sensor of a known technology that senses the temperature of the cooling medium flowing into the cooling medium flow passage 71 through the cooling medium inlet 73.

Therefore, in the embodiment of the present invention, since the temperature sensor 81 is mounted on the cooling medium inlet 73 side for introducing the cooling medium into the cooling medium flow passage 71 in the motor housing 11 as described above, cooling is performed. By accurately sensing the temperature of the cooling medium flowing into the cooling medium flow passage 71 through the medium inlet 73, precise temperature control of the driving motor 10 can be achieved.

As described above, according to the driving system 100 of the driving motor and the reduction gear integrated type according to the embodiment of the present invention, the inverter mounting portion 51 is formed in the reduction gear housing 21, and the sensor portion as the resolver 63 ( 61 may be mounted on the reduction gear housing 21, and a temperature sensor 81 for sensing the temperature of the cooling medium may be configured on the cooling medium inlet 73 side of the motor housing 11.

Here, the drive system 100 of the driving motor and the reduction gear integrated may constitute any one of the inverter mounting unit 51, the sensor unit 61 and the temperature sensor 81 as described above in the embodiment of the present invention. .

In addition, the driving system 100 of the driving motor and the reduction gear integrated according to the embodiment of the present invention may constitute the inverter mounting unit 51 and the sensor unit 61, and the inverter mounting unit 51 and the temperature sensor 81 may be formed. It can be configured, the sensor unit 61 and the temperature sensor 81 can be configured, and the inverter mounting unit 51, the sensor unit 61 and the temperature sensor 81 as a whole may be configured.

Although the embodiments of the present invention have been described above, the technical idea of the present invention is not limited to the embodiments presented herein, and those skilled in the art to understand the technical idea of the present invention are within the scope of the same technical idea, Other embodiments may be easily proposed by the addition, modification, deletion, addition, etc., but this is also within the scope of the present invention.

10: Drive motor 11: motor housing
13: motor unit 15: stator
17: rotating shaft 19: rotor
20: reducer 21: reducer housing
23: reduction unit 25: output shaft
27: reduction gear group 30: inverter
31: inverter housing 33: current applying unit
51: inverter mounting portion 53: fastening boss
55: mounting boss 57: mounting hole
61: sensor unit 63: resolver
65: resolver stator 67: resolver rotor
71: cooling medium flow path 73: cooling medium inlet
75: cooling medium outlet 77: branch
81: temperature sensor B1: first bearing
B2: second bearing B3: third bearing
100: drive system

Claims (11)

delete delete delete delete delete delete delete A drive system comprising a drive motor with a motor unit and a reducer with a reduction unit in one piece,
The drive motor includes a motor housing for receiving the motor unit, the reducer includes a reducer housing for receiving the reduction unit and coupled to the motor housing,
A cooling medium flow passage for cooling the motor unit as a cooling medium is formed in the motor housing, and a branching portion is formed in the cooling medium flow passage, and the branching portion is provided as a protruding passage connected to the cooling medium flow passage. ,
The motor housing is provided with a cooling medium inlet and a cooling medium outlet connected to the cooling medium flow passage, and the branch part is equipped with a temperature sensor for detecting the temperature of the cooling medium, and the branching part is provided with the cooling medium inlet. A drive motor and drive reducer integrated drive system, characterized in that disposed close to the unit. delete The method of claim 8,
The reducer housing is integrally provided with an inverter mounting portion for mounting the inverter,
And a current applying unit for electrically connecting the motor unit and the inverter and applying an alternating current to the motor unit. The method of claim 10,
The reduction gear housing has a drive motor and a reduction gear integrated drive system, characterized in that the sensor unit as a resolver for detecting the rotational speed and the absolute position of the rotor of the motor unit.

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