KR20240002450A - Drive system having coupling structure of motor and reducer - Google Patents

Abstract

A drive system integrated with a drive motor and a reducer is disclosed. The drive motor and reducer integrated drive system according to an exemplary embodiment of the disclosed present invention includes i) a drive motor including a motor housing provided with a first oil storage portion and a motor unit installed inside the motor housing, and ii) ) A reducer housing that is coupled to the motor housing and in which the second oil storage part is provided separately from the first oil storage part, and a reducer installed inside the reducer housing and including a reduction unit connected to the motor unit, iii) 1 A first pumping unit connected to the first oil storage unit through a suction path and connected to the motor unit through a first discharge path, iv) connected to the first pumping unit through a power transmission unit, and a second suction pass. It may include a second pumping unit connected to the second oil storage unit through a second discharge path and connected to the deceleration unit through a second discharge path, and v) a pumping motor unit connected to any one of the first pumping unit and the second pumping unit. there is.

Description

Drive motor and reducer integrated drive system {DRIVE SYSTEM HAVING COUPLING STRUCTURE OF MOTOR AND REDUCER}

Embodiments of the present invention relate to a drive system for an electric vehicle, and more specifically, to a drive system integrated with a drive motor and a reducer.

Recently, electric-powered, eco-friendly vehicles such as electric vehicles or hydrogen-electric vehicles have been attracting attention. These electric-powered eco-friendly vehicles are equipped with electric motors (hereinafter referred to as 'drive motors') as a driving source that obtains rotational force from electrical energy instead of internal combustion engines such as existing engines.

The drive motor includes a motor housing, a motor unit installed inside the motor housing, for example, a stator, and a rotor that is disposed with a certain gap between the stator and rotates around the drive shaft.

Meanwhile, a reducer is connected to the drive motor to increase torque by reducing the rotation speed of the drive shaft. Previously, the drive motor and reducer were manufactured as separate parts, but recently, there is an increasing number of cases where the drive motor and reducer are integrated into one piece to reduce weight and cost.

The reducer has a reducer housing coupled to the motor housing of the drive motor, a driven shaft coupled to the drive shaft of the drive motor, and is provided with a reduction unit (e.g., reduction gear device) disposed in the reducer housing.

The integrated drive system of the drive motor and reducer as described above requires lubrication and cooling of the motor unit and reduction unit during the process of transmitting the driving force of the drive motor to the reducer.

Meanwhile, in a drive system integrated with a drive motor and a reducer, oil (e.g., general-purpose oil) shared between the motor housing and the reducer housing is used for lubrication and cooling of the motor unit and the reduction unit.

This drive motor and reducer integrated drive system accommodates oil inside the interconnected motor housing and reducer housing, churning the oil shared inside the motor housing and reducer housing through one oil pump, and connecting the motor unit and the reducer housing. Lubrication and cooling of the reduction unit occur simultaneously.

However, according to the prior art, since the oil is shared inside the motor housing and the reducer housing, it is disadvantageous to manage the cleanliness of the drive motor and reducer due to foreign substances contained in the oil, and either the drive motor or the reducer is exposed to oil. If it breaks down due to foreign substances, the other one may also break down.

In addition, in the prior art, as the drive motor and reducer use general-purpose oil, it is disadvantageous to optimize oil performance suited to the characteristics of each drive motor and reducer.

Furthermore, in the prior art, the same ratio of oil is supplied to the drive motor and the reducer even though the rotation speeds of the drive motor and the reducer are different, which is disadvantageous in optimizing the oil supply flow rate to the drive motor and the reducer.

The matters described in this background art section have been written to improve understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art in the field to which this technology belongs.

Embodiments of the present invention seek to provide a drive system integrated with a drive motor and a reducer that allows oil to be supplied to the drive motor and the reducer respectively in a simple configuration without sharing oil for lubrication and cooling of the drive motor and the reducer.

A drive system integrated with a drive motor and a reducer according to an embodiment of the present invention includes i) a motor housing provided with a first oil storage unit, a drive motor including a motor unit installed inside the motor housing, and ii) the motor. A reducer housing coupled to the housing and having a second oil storage portion separate from the first oil storage portion, a reducer installed inside the reducer housing and including a deceleration unit connected to the motor unit, iii) a first pumping unit connected to the first oil storage unit through a first suction path and connected to the motor unit through a first discharge path; iv) connected to the first pumping unit through a power transmission unit; 2 a second pumping unit connected to the second oil storage unit through a suction path and connected to the deceleration unit through a second discharge path, and v) to any one of the first pumping unit and the second pumping unit. It may include a connected pumping motor unit.

Additionally, in the drive system integrated with the drive motor and reducer according to an embodiment of the present invention, the first pumping unit sucks the first oil contained in the first oil storage unit through the first suction path, and It can be discharged to the motor unit through the discharge pass.

Additionally, in the drive system integrated with the drive motor and reducer according to an embodiment of the present invention, the second pumping unit sucks the second oil contained in the second oil storage unit through the second suction path, and It can be discharged to the reduction unit through the discharge pass.

Additionally, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the first pumping unit may include a first pumping drive shaft disposed along a set axial direction.

Additionally, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the second pumping unit may include a second pumping drive shaft disposed in parallel with the first pumping drive shaft.

Additionally, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the first and pumping drive shafts and the second pumping drive shaft may be rotated at different rotation speeds by the power transmission unit.

In addition, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the power transmission unit includes a first sprocket coupled to the first pumping drive shaft, and a second pumping drive shaft with a gear ratio different from the first sprocket. It may include a second sprocket coupled to and a chain connected to the first sprocket and the second sprocket.

In addition, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the power transmission unit is coupled to a first gear coupled to the first pumping drive shaft and the second pumping drive shaft, and the first gear It may include a second gear meshed with the first gear at a different gear ratio.

Additionally, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the pumping motor unit may include a pumping motor shaft connected to one of the first pumping drive shaft and the second pumping drive shaft.

In addition, in the drive motor and reducer integrated drive system according to an embodiment of the present invention, the first pumping unit and the second pumping unit may be installed in the first pump housing and the second pump housing, respectively, having independent spaces. .

Embodiments of the present invention are advantageous in managing the cleanliness of the drive motor and reducer, can prevent total failure of the drive motor and reducer, and can contribute to cost reduction and performance improvement of the drive system.

In addition, effects that can be obtained or expected due to 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 expected according to embodiments of the present invention will be disclosed in the detailed description to be described later.

Since these drawings are for reference in explaining exemplary embodiments of the present invention, the technical idea of the present invention should not be interpreted as limited to the attached drawings.
1 is a block diagram schematically showing a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.
Figure 2 is a diagram schematically showing a first pumping unit and a second pumping unit applied to a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.
Figure 3 is a diagram schematically showing an example of a power transmission unit applied to a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.
Figure 4 is a diagram for explaining the operation of a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.
Figure 5 is a diagram schematically showing another example of a power transmission unit applied to a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.
The drawings referenced above are not necessarily drawn to scale and should be understood as presenting a rather simplified representation of various preferred features illustrating the basic principles of the invention. The specific design features of the invention, including, for example, specific dimensions, orientation, location, and shape, will be determined in part by the particular intended application and usage environment.

The terminology used herein is for the purpose of describing specific embodiments and is not intended to limit the invention. As used herein, the singular forms are intended to also include the plural forms, unless the context clearly dictates otherwise. As used herein, the terms 'comprise' and/or 'comprising' indicate the presence of specified features, integers, steps, operations, elements and/or components, but may also include one or more other features, integers or steps. It should also be understood that this does not exclude the presence or addition of elements, operations, components, and/or groups thereof. As used herein, the term 'and/or' includes any one or all combinations of one or more items listed in association. In this specification, the term 'coupled' refers to two components in which the components are directly connected to each other by welding, SPR (Self Piercing Rivet), FDS (Flow Drill Screw), structural adhesive, etc., or indirectly connected through one or more intermediate components. Displays the physical relationship between components.

As used herein, “vehicle,” “vehicle of,” “automobile,” or other similar terms generally refer to passenger vehicles, including sports cars, sport utility vehicles (SUVs), buses, trucks, and various commercial vehicles. (passenger automobiles), hybrid vehicles, electric vehicles, hybrid electric vehicles, hydrogen-powered vehicles, electric vehicle-based Purpose Built Vehicle (PBV) vehicles, and other alternative fuel vehicles (e.g., non-petroleum-based vehicles). fuel derived from other resources).

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

1 is a block diagram schematically showing a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.

Referring to FIG. 1, the drive system 100 integrated with a drive motor and a reducer according to an embodiment of the present invention can be applied to a pure electric vehicle, such as an electric vehicle or a hydrogen electric vehicle.

Furthermore, the drive system 100 integrated with a drive motor and a reducer according to an embodiment of the present invention may be applied to a hybrid eco-friendly vehicle that uses the driving force of the engine and electric power.

The drive system 100 integrated with a drive motor and a reducer according to an embodiment of the present invention includes a drive motor 10 that generates rotational driving force by receiving electrical energy from a high-voltage battery, and a drive motor 10 that reduces the rotation speed of the drive motor 10. The reducer 20 (e.g., transmission) to increase torque is integrated.

Here, the drive motor 10 includes a motor housing 11 and a motor unit 13 installed inside the motor housing 11. The motor unit 13 includes a stator (not shown) fixed to the inside of the motor housing 11, and a rotor (not shown) that rotates around the drive motor shaft 15 with a certain gap between the stator and the stator. Contains. Since the configuration of the motor unit 13 is well known to those skilled in the art, further detailed description of the configuration will be omitted in this specification.

In addition, the reducer 20 includes a reducer housing 21 that is integrally coupled (or formed) with the motor housing 11 and a reduction unit 23 installed inside the reducer housing 21. The reducer housing 21 forms a space independent of the inside of the motor housing 11. The reduction unit 23 includes a reduction gear shaft 25 connected to the drive motor shaft 15 of the motor unit 13, and a reduction gear group 27 connected to the reduction shaft 25. Since the configuration of the deceleration unit 23 is well known to those skilled in the art, further detailed description of the configuration will be omitted in this specification.

Furthermore, the motor unit 13 and the reduction unit 23 as described above can be lubricated and cooled by oil. Accordingly, a flow path (not shown) through which oil as a lubricating or cooling medium can flow may be formed in the motor unit 13 and the reduction unit 23.

The drive system 100 integrated with a drive motor and a reducer according to an embodiment of the present invention does not share oil for lubrication and cooling of the motor unit 13 and the reduction unit 23, but has a simple configuration in which oil is used in the motor unit 13. ) and a reduction unit 23, respectively.

To this end, the driving motor and reducer integrated drive system 100 according to an embodiment of the present invention includes a first oil storage unit 31, a second oil storage unit 32, a first pumping unit 40, and a second pumping unit. It is composed of a unit 50, a power transmission unit 60, and a pumping motor unit 70, and each component is described as follows.

In an embodiment of the present invention, the first oil reservoir 31 is provided inside the motor housing 11, as shown in the drawing, in one example, and the first oil 1 can be accommodated. there is. In another example, the first oil storage unit 31 is provided on the outside of the motor housing 11 and may be connected to the inside of the motor housing 11 (not shown).

In an embodiment of the present invention, the second oil storage unit 32 is provided inside the reducer housing 21 separately from the first oil storage unit 31, as shown in the drawing. , the second oil 2 can be accommodated. In another example, the second oil storage unit 32 is provided on the outside of the reducer housing 21 and may be connected to the inside of the reducer housing 21 (not shown).

Here, the first oil 1 and the second oil 2 may be the same oil with the same composition and lubrication/cooling performance, or may be different oils with the same composition and lubrication/cooling performance.

In addition, the first oil 1 is supplied to the flow path of the motor unit 13, and may be discharged from the flow path and flow into the first oil storage unit 31. The second oil 2 is supplied to the flow path of the reduction unit 23, and may be discharged from the flow path and flow into the second oil storage unit 32.

In an embodiment of the present invention, the first pumping unit 40 sucks the first oil 1 contained in the first oil storage unit 31 at a set pumping pressure and supplies the first oil 1 at a set flow rate. It is designed to be discharged (eg, supplied) into the flow path of the motor unit 13.

Figure 2 is a diagram schematically showing a first pumping unit and a second pumping unit applied to a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.

Referring to Figures 1 and 2, the first pumping unit 40 includes a first pumping drive shaft 41 arranged along a set axial direction. As is well known to those skilled in the art, the first pumping unit 40 may generate pumping pressure by rotating the first pumping drive shaft 41.

The first pumping unit 40 is connected to the first oil storage unit 31 through the first suction path 43, and may be connected to the flow path of the motor unit 13 through the first discharge path 45. .

The first suction path 43 includes a first suction port 44a formed in the first pumping unit 40, and a first suction line 44b connected to the first suction port 44a and the first oil storage unit 31. may include.

In addition, the first discharge path 45 includes a first discharge port 46a formed in the first pumping unit 40, and a first discharge line 46b connected to the first discharge port 46a and the flow path of the motor unit 13. ) may include.

Accordingly, the first pumping unit 40 sucks the first oil 1 contained in the first oil storage unit 31 through the first suction path 43, and pumps the first oil 1 into the motor through the first discharge path 45. It can be discharged into the flow path of the unit 13.

This first pumping unit 40 may be installed inside the first pump housing 47. In one example, the first pump housing 47 may be coupled to the motor housing 11 from the outside of the motor housing 11 . As an alternative, the first pump housing 47 may be installed inside the motor housing 11.

In an embodiment of the present invention, the second pumping unit 50 sucks the second oil 2 contained in the second oil storage unit 32 at a set pumping pressure and supplies the second oil 2 at a set flow rate. It is designed to be discharged (eg, supplied) into the flow path of the deceleration unit 23.

The second pumping unit 50 includes a second pumping drive shaft 51 arranged in parallel along an axial direction different from the first pumping drive shaft 41 of the first pumping unit 40. That is, the second pumping drive shaft 51 may be arranged along an axial direction parallel to and spaced apart from the first pumping drive shaft 41.

The reason why the first pumping drive shaft 41 of the first pumping unit 40 and the second pumping drive shaft 51 of the second pumping unit 50 cannot be configured on the same axis is because the first oil storage unit ( This is because the oil levels of the first oil 1 contained in 31) and the second oil 2 contained in the second oil storage unit 32 are different from each other.

The second pumping drive shaft 51 may be connected to the first pumping drive shaft 41 through a power transmission unit 60, which will be explained further later. As is well known to those skilled in the art, the second pumping unit 50 can generate pumping pressure by rotating the second pumping drive shaft 51.

This second pumping unit 50 is connected to the first pumping unit 40 through the power transmission unit 60, and is connected to the second oil storage unit 32 through the second suction path 53. It can be connected to the flow path of the deceleration unit 23 through the second discharge path 55.

The second suction path 53 includes a second suction port 54a formed in the second pumping unit 50, and a second suction line 54b connected to the second suction port 54a and the second oil storage unit 32. may include.

In addition, the second discharge path 55 includes a second discharge port 56a formed in the second pumping unit 50, and a second discharge line 56b connected to the second discharge port 56a and the flow path of the deceleration unit 23. ) may include.

Therefore, the second pumping unit 50 sucks the second oil 2 contained in the second oil storage unit 32 through the second suction path 53 and decelerates the second oil 2 through the second discharge path 55. It can be discharged through the flow path of the unit 23.

The second pumping unit 50 as described above may be installed inside the second pump housing 57, which has a space independent of the inside of the first pump housing 47. In one example, the second pump housing 57 may be coupled to the reducer housing 21 from the outside of the reducer housing 21 . As an alternative, the second pump housing 57 may be installed inside the reducer housing 21.

1 and 2, in an embodiment of the present invention, the power transmission unit 60 connects the first pumping unit 40 and the second pumping unit 50, and the first pumping unit 40 and the driving force input to one of the second pumping units 50 is transmitted to the other.

The power transmission unit 60 is connected to the first pumping drive shaft 41 of the first pumping unit 40 and the second pumping drive shaft 51 of the second pumping unit 50.

Figure 3 is a diagram schematically showing an example of a power transmission unit applied to a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.

Referring to FIGS. 1 to 3 , the power transmission unit 60 according to an example includes a first sprocket 61, a second sprocket 62, and a chain 63.

The first sprocket 61 is coupled to the first pumping drive shaft 41. The second sprocket 62 is coupled to the second pumping drive shaft 51 with a different gear ratio than the first sprocket 61. And, the chain 63 is connected to the first sprocket 61 and the second sprocket 62.

Here, because the first sprocket 61 and the second sprocket 62 are provided with different gear ratios, the first pumping drive shaft 41 and the second pumping drive shaft 51 can each rotate at different rotation speeds. there is.

The power transmission unit 60 configured as above is a driving force input to any one of the first pumping drive shaft 41 of the first pumping unit 40 and the second pumping drive shaft 51 of the second pumping unit 50. Can be transmitted to one another through the first sprocket 61, the second sprocket 62, and the chain 63.

Referring to Figures 1 to 3, in an embodiment of the present invention, the pumping motor unit 70 generates a motor driving force, and a motor is installed in any one of the first pumping unit 40 and the second pumping unit 50. It is designed to apply driving force.

The pumping motor unit 70 has a motor structure well known to those skilled in the art, and is connected to either the first pumping unit 40 or the second pumping unit 50.

The pumping motor unit 70 may be connected to either the first pumping drive shaft 41 of the first pumping unit 40 or the second pumping drive shaft 51 of the second pumping unit 50. In one example, the pumping motor unit 70 may be connected to the first pumping drive shaft 41 of the first pumping unit 40.

Hereinafter, the operation of the drive motor and reducer integrated drive system 100 according to an embodiment of the present invention configured as described above will be described in detail.

Figure 4 is a diagram for explaining the operation of the drive system integrated with the drive motor and reducer according to an embodiment of the present invention.

Referring to FIGS. 1 to 4, first, the motor unit 13 is mounted inside the motor housing 11 of the drive motor 10, and the first oil storage portion 31 inside the motor housing 11. The first oil 1 is accommodated in .

In addition, the reduction unit 23 is mounted inside the reducer housing 21 of the reducer 20, and the second oil 2 is accommodated in the second oil storage portion 32 inside the reducer housing 21. there is.

In this state, the driving force generated by driving the motor unit 13 is transmitted to the reducer shaft 25 of the reduction unit 23 through the drive motor shaft 15, and the driving force causes the reduction unit 23 to This works.

In the above process, the pumping motor unit 70 generates driving force and applies the driving force to the first pumping drive shaft 41 of the first pumping unit 40. Then, the first pumping unit 40 generates pumping pressure by rotating the first pumping drive shaft 41.

Accordingly, the first pumping unit 40 sucks the first oil 1 contained in the first oil storage unit 31 through the first suction path 43, and pumps the first oil 1 into the motor through the first discharge path 45. It is discharged into the flow path of unit 13.

Accordingly, the motor unit 13 is lubricated and cooled by the first oil 1, and the first oil 1 used for lubrication and cooling the motor unit 13 is the first oil storage unit 31. ) is accepted.

At the same time, the driving force of the first pumping unit 40 is transmitted to the second pumping drive shaft 51 of the second pumping unit 50 through the power transmission unit 60. Then, the second pumping unit 50 generates pumping pressure by rotating the second pumping drive shaft 51.

Therefore, the second pumping unit 50 sucks the second oil 2 contained in the second oil storage unit 32 through the second suction path 53 and decelerates the second oil 2 through the second discharge path 55. It is discharged into the flow path of unit 23.

Accordingly, the reduction unit 23 is lubricated and cooled by the second oil 2, and the second oil 2 used for lubrication and cooling of the reduction unit 23 is supplied to the second oil storage unit 32. ) is accepted.

Here, the first pumping drive shaft 41 and the second pumping drive shaft 51 are each rotated at different rotation speeds by the power transmission unit 60, and the set driving of the drive motor 10 and the reducer 20 Each can be rotated at a different number of rotations depending on the conditions.

As the first pumping drive shaft 41 and the second pumping drive shaft 51 are each rotated at different rotation speeds by the power transmission unit 60, the first pumping unit 40 and the second pumping unit 50 ) can pump each of the first oil (1) and the second oil (2) with different pumping capacities.

According to the drive motor and reducer integrated drive system 100 according to the embodiment of the present invention as described so far, the oil for lubrication and cooling of the drive motor 10 and the reducer 20 is not shared, but the first oil is used. (1) and the second oil (2) can be supplied to the motor unit 13 of the drive motor 10 and the reduction unit 23 of the reducer 20, respectively.

Therefore, in the embodiment of the present invention, it is advantageous to manage the cleanliness of the drive motor 10 and the reducer 20, and it is possible to prevent a total failure of the drive motor 10 and the reducer 20 due to foreign substances. This can improve reliability and reduce repair costs.

In addition, in the embodiment of the present invention, oil that satisfies the driving conditions of the drive motor 10 and the reducer 20 is used, thereby optimizing the oil performance according to the characteristics of the drive motor 10 and the reducer 20. can do.

Furthermore, according to the drive motor and reducer integrated drive system 100 according to an embodiment of the present invention, the first pumping unit 40 and the second pumping unit 50 are respectively operated through a single pumping motor unit 70. While driving, the first oil (1) can be supplied to the motor unit (13), and the second oil (2) can be supplied to the deceleration unit (23).

As a result, embodiments of the present invention can contribute to reducing manufacturing costs and improving performance of the entire drive system.

In addition, in the embodiment of the present invention, the first pumping unit 40 and the second pumping unit 50 can be driven at different rotational speeds by the power transmission unit 60, so the driving motor 10 and the reducer ( 20), the oil supply flow rate can be optimized.

Figure 5 is a diagram schematically showing another example of a power transmission unit applied to a drive system integrated with a drive motor and a reducer according to an embodiment of the present invention.

Referring to FIG. 5 , the power transmission unit 160 according to another example includes a first gear 161 and a second gear 162.

The first gear 161 is coupled to the first pumping drive shaft 41 of the first pumping unit 40. In addition, the second gear 162 is coupled to the second pumping drive shaft 51 of the second pumping unit 50, and is meshed with the first gear 161 at a different gear ratio. In one example, the first gear 161 and the second gear 162 may be provided as external gears.

Therefore, the power transmission unit 160 provides the driving force input to any one of the first pumping drive shaft 41 of the first pumping unit 40 and the second pumping drive shaft 51 of the second pumping unit 50. It can be transmitted to the other through the first gear 161 and the second gear 162.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and can be implemented with various modifications within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this can also be done with various modifications. It is natural that it falls within the scope of the invention.

1: first oil 2: second oil
10: Drive motor 11: Motor housing
13: motor unit 15: drive motor shaft
20: Reducer 21: Reducer housing
23: Reduction unit 25: Reducer shaft
27: reduction gear group 31: first oil reservoir
32: second oil storage unit 40: first pumping unit
41: first pumping drive shaft 43: first suction pass
44a: first suction port 44b: first suction line
45: first discharge pass 46a: first discharge port
46b: first discharge line 47: first pump housing
50: second pumping unit 51: second pumping drive shaft
53: second suction pass 54a: second suction port
54b: second suction line 55: second discharge pass
56a: second discharge port 56b: second discharge line
57: second pump housing 60, 160: power transmission unit
61: 1st sprocket 62: 2nd sprocket
63: Chain 70: Pumping motor unit
100: Drive motor and reducer integrated drive system
161: first gear 162: second gear

Claims (9)

A drive motor including a motor housing provided with a first oil storage portion and a motor unit installed inside the motor housing;
A reducer that is coupled to the motor housing and includes a reducer housing in which a second oil storage portion is provided separately from the first oil storage portion, and a reduction unit installed inside the reducer housing and connected to the motor unit;
a first pumping unit connected to the first oil storage unit through a first suction path and connected to the motor unit through a first discharge path;
a second pumping unit connected to the first pumping unit through a power transmission unit, connected to the second oil storage unit through a second suction path, and connected to the deceleration unit through a second discharge path; and
a pumping motor unit connected to one of the first pumping unit and the second pumping unit;
An integrated drive system including a drive motor and a reducer. According to claim 1,
The first pumping unit,
A drive system integrated with a drive motor and a reducer that suctions the first oil contained in the first oil storage unit through the first suction path and discharges it to the motor unit through the first discharge path. According to clause 2,
The second pumping unit,
A drive system integrated with a drive motor and a reducer that sucks the second oil contained in the second oil storage unit through the second suction path and discharges it to the reduction unit through the second discharge path. According to claim 1,
The first pumping unit includes a first pumping drive shaft disposed along a set axial direction,
The second pumping unit is a driving motor and reducer integrated drive system including a second pumping drive shaft disposed in parallel with the first pumping drive shaft. According to clause 4,
The first and pumping drive shafts and the second pumping drive shaft,
A drive system with an integrated drive motor and reducer that rotates at different rotation speeds by the power transmission unit. According to clause 4,
The power transmission unit,
A first sprocket coupled to the first pumping drive shaft,
A second sprocket coupled to the second pumping drive shaft with a gear ratio different from that of the first sprocket,
Chain connected to the first sprocket and the second sprocket
An integrated drive system including a drive motor and a reducer. According to clause 4,
The power transmission unit,
A first gear coupled to the first pumping drive shaft,
A second gear coupled to the second pumping drive shaft and meshed with the first gear at a gear ratio different from that of the first gear.
An integrated drive system including a drive motor and a reducer. According to clause 4,
The pumping motor unit,
A pumping motor shaft connected to one of the first pumping drive shaft and the second pumping drive shaft.
An integrated drive system including a drive motor and a reducer. According to claim 1,
The first pumping unit and the second pumping unit are respectively installed in a first pump housing and a second pump housing having independent spaces. A drive system integrated with a drive motor and a reducer.

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