WO2016068470A1

WO2016068470A1 - Driving module for vehicle

Info

Publication number: WO2016068470A1
Application number: PCT/KR2015/008987
Authority: WO
Inventors: 이민성; 한승도; 민율홍
Original assignee: 엘지전자 주식회사
Priority date: 2014-10-30
Filing date: 2015-08-27
Publication date: 2016-05-06
Also published as: KR101618554B1; CN106160333A; CN106160333B

Abstract

The present invention comprises a motor, a gear device mounted on the motor, and a drive shaft which rotates interlocking with the gear device, wherein the motor comprises: a motor housing; a hollow stator mounted in the motor housing; a rotor rotatably disposed inside the stator; and a hollow motor shaft having a hollow portion through which the drive shaft passes, and having the rotor mounted thereon. At least one of the hollow motor shaft and the drive shaft has an oil transfer unit for guiding, in the direction of the gear device, an oil which is introduced from the gear device into between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft, thereby being capable of preventing the oil of the gear device from leaking through between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft, and of minimizing damage to the inside of the motor which may occur when the oil which has passed between the inner circumference of the hollow motor and the outer circumference of the drive shaft leaks into the motor.

Description

Vehicle drive module

The present invention relates to a drive module for a vehicle, and more particularly, to a drive module for a vehicle combined with a motor and a gear device.

In general, a vehicle may be divided into a chassis in which an exterior body and various devices are organically connected.

The chassis includes a driving source such as an engine or a motor which is a driving force for driving, and main devices such as a power transmission device, a steering device, a suspension device and a braking device.

An internal combustion engine such as an engine is used for a drive source installed in a vehicle.In an internal combustion engine, which mainly uses volatile fuels, the fuel is compressed in a state where the fuel is mixed well with oxygen in the air to combust and then burned. The kinetic energy is obtained directly from the generated heat energy. Since internal combustion engines using such volatile fuels cause environmental pollution and exhaustion of petroleum resources due to exhaust gas, electric vehicles powered by electricity have been attracting attention as an alternative.

The electric vehicle may drive the vehicle by rotating the motor for driving the vehicle with electric power accumulated in the battery without using petroleum fuel and an engine, and may be a pollution-free vehicle without exhaust gas.

When the vehicle uses the motor as a driving source, a gear device for transmitting the driving force of the motor may be installed, and in this case, oil may be contained in the gear device.

It is an object of the present invention to provide a driving module for a vehicle that can minimize the inflow of the oil of the gear device into the motor through the motor shaft.

The present invention is a motor; A gear device installed in the motor; A drive shaft rotated in association with the gear device, the motor comprising a motor housing; A stator installed inside the motor housing and hollowed out; A rotor rotatably positioned inside the stator; And a hollow motor shaft through which the drive shaft penetrates and the rotor is installed, wherein at least one of the hollow motor shaft and the drive shaft is introduced between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft in the gear device. An oil conveying part is formed to guide oil to the gear device.

The present invention is a motor; A gear device installed in the motor; A drive shaft rotated in association with the gear device, the motor comprising a motor housing; A stator installed inside the motor housing and hollowed out; A rotor rotatably positioned inside the stator; A hollow motor shaft through which the drive shaft penetrates, the rotor is installed, and one end of which is positioned inside the gear device; A slip ring disposed closer to the other end of one end and the other end of the hollow motor shaft; And a brush assembly in contact with the slip ring, wherein at least one of the hollow motor shaft and the drive shaft includes oil introduced between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft in the gear device in a direction opposite to the slip ring. Inducing oil conveying portions are formed.

The gear device may include a gear box mounted to the motor and having a space formed therein, and the oil transfer part may be formed by a groove part formed at an inner circumference of one end of the hollow motor shaft.

The oil transfer part may be formed to step with the groove part.

The oil transfer unit may be alternately formed peaks and valleys in the circumferential direction of the hollow motor shaft.

The height of the mountain is less than the pitch of the mountain and may exceed half the pitch of the mountain.

The oil transfer part may have an oil splash surface formed in a zigzag shape in the circumferential direction of the hollow motor shaft to scatter oil flowing from the gear device into the gear device.

The oil transfer part may include a spiral groove formed at an inner circumference of the hollow motor shaft to guide oil in the direction of the gearbox when the hollow motor shaft is rotated.

The motor may rotate the hollow motor shaft in a first rotation direction when the vehicle is advanced, and the spiral groove may guide oil to the gear device when the hollow motor shaft is rotated in the first rotation direction.

The gear device may include a gear box mounted to the motor and having a space formed therein, the hollow motor shaft may have a stepped groove formed at an inner circumference of one end of the hollow motor shaft, and the oil transfer unit may It may be formed to face the groove on the outer circumferential surface of the drive shaft.

The oil transfer part may protrude from the outer circumferential surface of the drive shaft toward the groove part.

The oil transfer part may have an oil splash surface in which acid and valley are alternately formed.

The outer diameter of the oil transfer part may be smaller than the inner diameter of the groove part, and may be larger than the inner diameter of the hollow motor shaft or the same as the inner diameter of the hollow motor shaft.

The slip ring may be formed with a plurality of blades facing the brush assembly on the outer circumference.

The brush assembly may be spaced apart from the first brush, the second brush, and the brush housing, and the slip ring may include a first lead wire in contact with the first brush, and a second lead wire in contact with the second brush. The plurality of blades may be sequentially disposed in the circumferential direction of the insulating guide on the outer circumference of the insulating guide.

The present invention can prevent the oil of the gear unit from leaking between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft, and the oil passing between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft may leak into the motor. There is an advantage that can minimize the damage to the internal motor that can occur when.

In addition, it is possible to prevent the inflow of oil vapor by forming a blade for blowing toward the brush assembly on the outer circumference of the slip ring installed closer to the other end opposite to the one end close to the gear device of the hollow motor shaft. In addition, it is possible to prevent the brush powder from being deposited on the slip ring or the brush assembly by the oil vapor introduced therein, thereby destroying the insulation.

1 is a cross-sectional view showing the inside of a first embodiment of a vehicle driving module according to the present invention;

Figure 2 is a view showing the oil transfer unit of the vehicle drive module first embodiment according to the present invention,

3 is a view showing an oil conveying unit of a second embodiment of a vehicle driving module according to the present invention;

4 is a view showing the inside of the main part of a third embodiment of a vehicle driving module according to the present invention;

5 is a view showing a third embodiment of the oil transfer unit for a vehicle drive module according to the present invention;

6 is a view showing the inside of the main part of the fourth embodiment of the vehicle drive module according to the present invention.

Figure 7 is a view showing the shape of the blade formed in the slip ring according to the present invention.

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

1 is a cross-sectional view showing the inside of a first embodiment of a vehicle drive module according to the present invention, Figure 2 is a view showing the oil transfer unit of the first embodiment of the vehicle drive module according to the present invention.

The vehicle driving module includes a motor 2; A gear device 4 installed on the motor 2; It may include a drive shaft (6) rotated in conjunction with the gear device (4).

The motor 2 may be installed in a vehicle and may be a driving source for generating a driving force for rotating the wheel. The motor 2 includes a motor housing 12; A stator 14 installed inside the motor housing 12 and hollowed therein; A rotor 16 rotatably positioned inside the stator 14; The rotor 16 includes a hollow motor shaft 18 provided with a hollow portion through which the drive shaft 6 is penetrated.

The motor 2 may rotate the rotor 16 by the electromagnetic action of the rotor 16 and the stator 14, and when the rotor 16 is rotated, the hollow motor shaft 18 may be rotated. When driving the motor 2, the rotational force of the hollow motor shaft 18 can be transmitted to the drive shaft 6 via the gear device 4.

The motor housing 12 may form an appearance of the motor 2. The motor space in which the rotor 16 and the stator 14 are accommodated may be formed in the motor housing 12. The motor housing 12 may be composed of a combination of a plurality of members. The motor housing 12 includes a frame 21 surrounding the outer circumference of the stator 14, a first cover 22 coupled to one side of the frame 21, and a second coupled to the other side of the frame 21. The cover 23 may be included.

The frame 21 may be formed in a hollow cylinder shape surrounding the stator 14. A first bearing 24 supporting the hollow motor shaft 18 may be installed in the first cover 22. A second bearing 25 supporting the hollow motor shaft 18 may be installed at the second cover 23.

The motor 2 may be a driving motor installed in the electric vehicle to drive the electric vehicle. An electric vehicle having a motor 2 may include a battery, and may include an inverter electrically connected to the battery. The inverter may be connected to the stator 14 to apply three-phase alternating current to the stator 14. The inverter may be electrically connected to the brush assembly 40 which will be described later to apply a direct current to the brush assembly 40.

The stator 14 includes a stator core, a stator coil wound around the stator core, and may be coupled to the motor housing 12. The stator 14 may be fixed to at least one of the frame 21, the first cover 22, and the second cover 23.

The stator coil may be installed in the stator core to form magnetic flux, and three-phase alternating current applied from the inverter may be applied.

The rotor 16 includes a rotor core and a rotor coil wound around the rotor core, which may be coupled to the hollow motor shaft 18 and rotated about the hollow motor shaft 18.

DC may be applied to the rotor coil through the brush assembly 40 and the slip ring 30 to be described later.

The hollow motor shaft 18 may be connected to the gear device 4. The hollow motor shaft 18 may have a hollow portion through which the drive shaft 6 penetrates in a long direction of the hollow motor shaft 18.

The inner diameter D1 of the hollow motor shaft 18 may be larger than the outer diameter D2 of the drive shaft 6. The hollow motor shaft 18 may be formed shorter in length than the drive shaft 6. A gap T may exist between the inner circumference of the hollow motor shaft 18 and the outer circumference of the drive shaft 6.

The motor 2 may be constituted by a brush type DC motor, and the motor 2 includes a slip ring 30 installed on the hollow motor shaft 18 and a brush assembly in contact with the slip ring 30 ( 40) may be further included.

The motor 2 may generate torque by the rotor current flowing through the slip ring 30 to the rotor coil and the alternating current of the stator coil.

The slip ring 30 is a commutator installed in the hollow motor shaft 2 and may be rotated together with the hollow motor shaft 18 in contact with the brushes 52 and 54 of the brush assembly 40. The slip ring 30 may be installed on the hollow motor shaft 2 to rotate together with the hollow motor shaft 2, and may apply a current applied from the brush assembly 40 to the rotor coil of the rotor 16. .

The slip ring 30 may be disposed at an outer circumference of one side in the longitudinal direction of the hollow motor shaft 18. The slip ring 30 may be installed at an outer circumference of a portion between one end 18A and the other end 18B of the hollow motor shaft 18.

The slip ring 30 may be installed closer to the other end 18B of the one end 18A and the other end 18B of the hollow motor shaft 18.

The slip ring 30 may be installed on the insulation guide 32 so that the first lead wire 34 and the second lead wire 36 are spaced apart from each other. The insulation guide 32 may be a lead wire holder that insulates the first lead wire 34 and the second lead wire 36 and fixes the first lead wire 34 and the second lead wire 36.

The insulation guide 32 may include a center guide 332 disposed between the first lead wire 34 and the second lead wire 36. The insulation guide 32 may include a first side guide 334 forming a first space in which the center guide 332 and the first lead wire 34 are accommodated. The insulation guide 32 may include a second side guide 336 forming a second space in which the center guide 332 and the second lead wire 36 are accommodated.

The insulation guide 32 may be formed of synthetic resin such as plastic. The insulation guide 32 may be formed in a hollow shape through which the hollow motor shaft 18 penetrates.

The first lead wire 34 and the second lead wire 36 may be formed of a copper material. The first lead wire 34 and the second lead wire 36 may be spaced apart from the insulation guide 32.

Slip ring 30 may be formed with a plurality of blades (B) facing the brush assembly 40 on the outer circumference. The plurality of blades B may be sequentially disposed in the circumferential direction of the insulation guide 32 on the outer circumference of the insulation guide 32.

The plurality of blades B may be formed on at least one outer circumference of the center guide 332, the first side guide 334, and the second side guide 336.

As shown in FIG. 7, each of the plurality of blades B has a first section B1 in which the distance L4 between the outer edge and the rotation axis of the slip ring gradually increases toward the circumferential direction of the slip ring 30. It may include. Each of the plurality of blades B may further include a second section B2 having a uniform distance L5 between the outer edge and the rotation axis of the slip ring toward the circumferential direction of the slip ring 30. Each of the plurality of blades B may further include a third section B3 in which the distance between the outer edge and the rotation axis of the slip ring gradually decreases in the circumferential direction of the slip ring 30.

In addition, each of the plurality of blades (B) does not include the second section (B2) and the section and the slip is gradually increased the distance between the outer edge and the rotation axis of the slip ring toward the circumferential direction of the slip ring 30 It may also include a section in which the distance between the outer edge and the rotation axis of the slip ring gradually decreases in the circumferential direction of the ring 30.

The plurality of blades B may be spaced apart from the brush assembly 40, and may form an air flow in a portion of the brush assembly 40 facing the slip ring 30 when the slip ring 30 is rotated. Air flow formed in the plurality of blades B may flow to the brush housing 56, which will be described later, of the brush assembly 40, and the air flowed into the brush housing 56 may include the first brush 52 and the second brush ( 54) can be prevented from being energized by a mixture of brush powder and oil or brush powder.

The brush assembly 40 may be installed to face the slip ring 30 inside the motor housing 12.

In the brush assembly 40, the first brush 52 and the second brush 54 may be spaced apart from the brush housing 56.

The first brush 52 may be disposed to contact the first lead wire 34 of the slip ring 30. The first brush 52 may be disposed in the brush housing 56 such that a portion of the first brush 52 is exposed to the outside of the brush housing 56, and an end of the portion located outside the brush housing 56 may be disposed at the first of the slip ring 30. The lead wire 34 may be in contact with the lead wire 34.

The second brush 54 may be disposed to contact the second lead wire 36 of the slip ring 30. The second brush 54 may be disposed in the brush housing 56 to be spaced apart from the first brush 52. The second brush 54 may be disposed in the brush housing 56 so that a portion thereof is exposed to the outside of the brush housing 56, and an end portion of the portion located outside the brush housing 56 is second of the slip ring 30. It may be in contact with the lead wire 36. An elastic member for elastically supporting the first brush 52 may be installed in the brush housing 56, and an elastic member for elastically supporting the second brush 54 may be installed.

The gear device 4 may be combined with the motor 2 to constitute one integrated vehicle driving module together with the motor 2 and the drive shaft 6, and the motor 2 and the gear device 4 may be integrated. Can be. The gear device 4 may be a drive shaft drive source for rotating the drive shaft 6 by the motor 2.

The gear device 4 may include a gear box 42 mounted to the motor 2 and having a space S formed therein. The gear device 4 may comprise a differential gear device 44 on which the drive shaft 6 is connected and rotated. The gear device 4 is connected to the hollow motor shaft 18 of the motor 2 and engaged with the differential gear device 44 to transfer the driving force of the motor 2 to the differential gear device 44. ) May be further included.

The gearbox 42 may be coupled to the motor housing 12 of the motor 2. The gear box 42 may be coupled to one of the first cover 22 and the second cover 23, and a space in which the differential gear device 44 is accommodated may be formed therein.

The gear box 42 has one member having a space therein coupled to one of the first cover 22 and the second cover 23, and a drive gear device 46 and a differential gear device 44 therebetween. It is possible to be located. The gear box 42 includes a first gear box coupled to one of the first cover 22 and the second cover 23, and a second gear coupled to the first gear box and having a space formed therebetween. It is possible to include a gear box, and the drive gear device 46 and the differential gear device 44 are located between the first gear box and the second gear box.

The differential gear device 44 and the drive gear device 46 may be located inside the gearbox 42. When the hollow motor shaft 18 of the motor 2 is rotated, the drive shaft 6 may be rotated. Can be. The driving force of the motor 2 can be transmitted to the differential gear device 44 through the drive gear device 46, and can be transmitted from the differential gear device 44 to the drive shaft 6.

The drive shaft 6 may be connected to the differential gear device 44, and the differential gear device 44 may rotate the drive shaft 6.

The differential gear device 44 may transmit the rotational force transmitted to the differential case 44B through the spur gear 44A to the drive shaft 6 through the differential gear 44C and the side gear 44D. The spur gear 44A may be a kind of input gear into which the driving force is input to the differential gear device 44, and may be engaged with the driven gear 46D described later of the drive gear device 46. The side gear 44D may be an output gear that transmits rotational force to the drive shaft 6.

The drive gear device 46 is provided on the drive gear 46A provided in the hollow motor shaft 18 of the motor 2, the counter shaft 46B parallel to the hollow motor shaft 18, and the counter shaft 46B. The counter gear 46C meshed with the drive gear 46A and the driven gear 46D provided on the counter shaft 46B and having a different gear ratio from the counter gear 46C may be included. The driven gear 46D of the drive gear device 46 may be composed of a spur gear. The drive gear device 46 may be configured as a reduction gear device, and may reduce the rotational force transmitted from the hollow motor shaft 18 of the motor 2 and transmit the deceleration force to the differential gear device 44.

The drive shaft 6 is connected to the differential gear device 44 and can be connected to the wheel to rotate the wheel.

The drive shaft 6 may include a first drive shaft 6A connected to the first wheel of the vehicle and a second drive shaft 6B connected to the second wheel of the vehicle. One of the first drive shaft 6A and the second drive shaft 6B may pass through the hollow motor shaft 18 of the motor 2.

In the vehicle drive module, it is preferable that oil of the gear device 4 does not flow in the direction opposite to the gear device 4 through the gap T between the drive shaft 6 and the hollow motor shaft 18.

If the oil of the gear device 4 flows in the opposite direction of the gear device 4 through the gap T between the drive shaft 6 and the hollow motor shaft 18, then the oil on the opposite side of the gear device 4. The flowed oil may be directed to the brush assembly 40 or the slip ring 30. Such oil may be mixed with the brush powder generated in the brush assembly 40 and adsorbed to the brush assembly 40 or the slip ring 30. When the oil is mixed with the brush powder and adsorbed to the brush assembly 40 or the slip ring 30 as described above, the insulation of the brush assembly 40 or the slip ring 30 may be destroyed, and the reliability of the motor 2 may be reduced. This can be low.

The vehicle drive module preferably does not allow oil of the gear device 4 to flow between the inner circumference of the hollow motor shaft 18 and the outer circumference of the drive shaft 6 so as not to flow to the opposite side of the gear device 4.

The vehicle driving module may be formed with an oil transfer part 80 for guiding oil introduced between the inner circumference of the hollow motor shaft 18 and the outer circumference of the drive shaft 6 from the gear device 4 to the gear device 4. have.

The oil transfer part 80 is formed in at least one of the hollow motor shaft 18 and the drive shaft 6, so that the oil is geared through a gap T between the drive shaft 6 and the hollow motor shaft 18. It can be prevented from flowing in the opposite direction of 4). The oil transfer part 80 may be configured to guide oil introduced between the inner circumference of the hollow motor shaft 18 and the outer circumference of the drive shaft 6 in the opposite direction of the slip ring 30.

The oil transfer part 80 may guide oil into the gear device 4 when the hollow motor shaft 18 and the drive shaft 6 rotate.

The oil transfer part 80 may be formed to face the outer circumference 7 of the drive shaft 6 on the inner circumference of the hollow motor shaft 18.

The oil transfer part 80 may be formed at an inner circumference of one end portion 18A located inside the gear device 4 of the hollow motor shaft 18. The one end 18A of the hollow motor shaft 18 has a first inner circumferential surface 180a having a first inner diameter and a second inner circumferential surface 180b having a second inner diameter smaller than the first inner diameter. The first inner circumferential surface and the second inner circumferential surface are formed stepped to form the oil transfer part.

The oil transfer part 80 may be formed by the groove part G formed in the inner circumference of one end 18A of the hollow motor shaft 18. The oil transfer part 80 may be formed to step with the groove part G. The hollow motor shaft 18 may be configured as a groove motor shaft in which the oil transfer unit 80 is integrally formed.

The oil transfer part 80 may be alternately formed with the peak 82A and the valley 82B in the circumferential direction of the hollow motor shaft 18. The oil transfer part 80 may have an oil splash surface 82 that is zigzag in the circumferential direction of the hollow motor shaft 18. The oil scattering surface 82 may scatter oil flowing from the gear device 4 into the gear device 4. The oil scattering surface 82 may face the space S of the gearbox 42. The oil scattering surface 82 may include

inclined surfaces

82C and 82D inclined in opposite directions with respect to the acid 82A inside the hollow motor shaft 18. The oil transfer part 80 preferably has a height H of the acid 82A and a pitch P of the acid 82A, which enables efficient scattering of the oil. When the height H of the acid 82A is too high, the oil transfer part 80 may have a portion of the oil remaining between the acid 82A and the acid 82A, so that the height H of the acid 82A is It is preferred that the oil is formed to a height where it does not stay. The height H of the peak 82A may be less than the pitch P of the peak 82A and may exceed half of the pitch P of the peak 82.

Hereinafter, the operation of the present invention will be described.

First, when driving the motor 2, the hollow motor shaft 18 and the drive shaft 6 can be rotated at different speeds, a speed difference can be generated between the two. When the speed difference occurs as described above, a speed component for inducing oil to the gearbox 42 side may be generated in the groove portion G of the hollow motor shaft 18.

When the hollow motor shaft 18 and the drive shaft 6 are rotated by the driving of the motor 2, the oil inside the gearbox 42 is partially partially in the inner circumferential surface of the hollow motor shaft 18 and the drive shaft. It may enter toward the clearance T between (6), and especially may enter into the groove part G among the clearances T between the inner circumferential surface of the hollow motor shaft 18 and the drive shaft 6. The oil entered into the groove G may be advanced toward the oil feeder 80 in the groove G, and thus the oil advanced toward the oil feeder 80 may be the oil splash surface 82 of the oil feeder 80. In particular, after hitting the mountain 82A and the

inclined surfaces

82C and 82D, it may be splashed in the opposite direction of the oil transfer unit 80. The oil splashed by the oil transfer part 80 may flow toward the space S that is outside the gap T between the inner circumferential surface of the hollow motor shaft 18 and the drive shaft 6.

The oil may be restricted to move in the opposite direction of the gearbox 42 through the gap T between the inner circumferential surface of the hollow motor shaft 18 and the drive shaft 6, the oil in the gearbox 42 While the amount is maintained in an appropriate amount, the possibility of damage by oil of the brush assembly 40 or the slip ring 30 can be minimized.

3 is a view illustrating an oil transfer unit of a second embodiment of a vehicle driving module according to the present invention.

The oil transfer part 80 of the present embodiment is formed on the inner circumference 19 of the hollow motor shaft 18 so as to guide oil in the direction of the gearbox 4 when the hollow motor shaft 18 rotates. And other constructions and actions other than the helical groove G 'are the same as or similar to those of the first embodiment of the present invention, and therefore the same reference numerals as those of the first embodiment of the present invention will be omitted. .

The helical groove G 'may be elongated helically along the inner circumference 19 of the hollow motor shaft 18. The helical groove G 'can start from one end 18A located in the space S inside the gear device 4 of the hollow motor shaft 18, and has a predetermined length in the longitudinal direction of the hollow motor shaft 18. Can be formed. The helical groove G 'can also be formed to the other end 18B of the hollow motor shaft 18. The helical groove G 'is not formed to the other end 18B of the hollow motor shaft 18 but may be formed to 1/2 to 1/4 of the length of the hollow motor shaft 18. One end of the helical groove G 'may be open to one end 18A of the hollow motor shaft 18, and the other end thereof may be closed.

The motor 2 may rotate the hollow motor shaft 18 in the first rotation direction when the vehicle is advanced, and the helical groove G 'gears oil when the first rotation direction of the hollow motor shaft 18 is rotated. It can guide in the direction of (4). For example, when the motor 2 rotates the hollow motor shaft 18 in the clockwise direction when the vehicle is advanced, the spiral groove G 'gears oil during the clockwise rotation of the hollow motor shaft 18. It may be formed in the spiral direction leading to (4). Conversely, when the motor 2 rotates the hollow motor shaft 18 counterclockwise when the vehicle is advanced, the spiral groove G 'gears oil when the hollow motor shaft 18 rotates counterclockwise. It may be formed in the spiral direction leading to (4).

When the motor 2 is driven, oil can enter between the hollow motor shaft 18 and the drive shaft 6 in the gear device 4, with oil entering between the hollow motor shaft 18 and the drive shaft 6. May flow into the spiral groove G 'and be guided in a spiral direction along the spiral groove G', and the oil guided in the spiral groove G 'is at one end 18A of the hollow motor shaft 18. It can be sprinkled into the gear unit 4.

4 is a view showing the inside of the main part of the third embodiment of the vehicle drive module according to the present invention, Figure 5 is a view showing the oil transfer unit of the third embodiment of the vehicle drive module according to the present invention.

In the hollow motor shaft 18 ′ of the present embodiment, the groove G 'may be formed stepwise at an inner circumference of one end portion 18A positioned in the space S inside the gear device 4, and the oil transfer portion ( 80 ') may be formed in the drive shaft 6, and other configurations and actions other than the groove portion G' and the oil conveying portion 80 'are the same or similar to those of the first embodiment of the present invention, and therefore the same reference numerals are used. Detailed description thereof will be omitted.

The oil transfer part 80 ′ may be formed on an outer circumferential surface of the drive shaft 6. The oil transfer part 80 ′ may be formed to face the groove part G ′. The oil transfer part 80 ′ may protrude from the outer circumferential surface of the drive shaft 6 toward the groove part G ′.

The oil transfer part 80 ′ may have an oil splash surface 82 ′ in which the peaks 82A and the valleys 82B are alternately formed. The oil transfer portion 80 'may be composed of a protrusion having a peak 82A and a valley 82B and protruding toward the groove portion G'.

The hill 82A and the valley 82B may be alternately formed in the circumferential direction of the oil transfer unit 80 ′ on a surface of the oil transfer unit 80 ′ facing the space S of the gearbox 42.

The oil splash surface 82 'is an

inclined surface

82C and 82D inclined in opposite directions with respect to the mountain 82A on the surface facing the space S of the gearbox 42 among the oil conveying portions 80'. It may include.

The oil transfer part 80 ′ may have an outer diameter D3 larger than an inner diameter D1 of the hollow motor shaft 18 or equal to an inner diameter D1 of the hollow motor shaft 18. The oil transfer part 80 ′ may have an outer diameter D3 smaller than an inner diameter D4 of the groove portion G ′.

In the hollow motor shaft 18 of the present embodiment, one end portion 18A may be located in the space S inside the gear device 4, and the oil transfer portion 80 ″ is recessed in the outer circumference of the drive shaft 6. It may be formed, other configurations and actions other than the oil transfer portion 80 "is the same or similar to the first embodiment of the present invention, so the same reference numerals are used and detailed description thereof will be omitted.

The oil conveying portion 80 "may be formed on the drive shaft 6 in proximity to one end 18A of the other end 18B of the one end 18A of the hollow motor shaft 18. The oil conveying portion 80" May be formed at a position facing the inner circumferential surface 19 of the hollow motor shaft 18.

The oil conveying part 80 "may be formed by the groove part G" formed in the outer periphery of the drive shaft 6. The oil transfer part 80 "may have an oil splash surface 82" in which the peaks 82A and the valleys 82B are alternately formed.

The hill 82A and the valley 82B may be alternately formed in the circumferential direction on the outer circumference of the drive shaft 6.

The oil splash surface 82 "may include

inclined surfaces

82C and 82D inclined in opposite directions with respect to the acid 82A.

The present invention is not limited to the above embodiments, and various modifications are possible within the technical scope of the present invention.

Claims

A motor; A gear device installed in the motor; A drive shaft rotated in association with the gear device,

The motor is

A motor housing;

A stator installed inside the motor housing and hollowed out;

A rotor rotatably positioned inside the stator;

A hollow part through which the drive shaft penetrates and includes a hollow motor shaft on which the rotor is installed,

At least one of the hollow motor shaft and the drive shaft is a vehicle drive module formed with an oil transfer unit for inducing the oil flowing in the gear unit between the inner circumference of the hollow motor shaft and the outer circumference of the drive shaft.
The method of claim 1,

The oil transfer unit is a vehicle drive module is formed on the inner circumference of one end of the hollow motor shaft close to the gear device.
The method of claim 2,

The one end portion of the hollow motor shaft has a first inner circumferential surface having a first inner diameter and a second inner circumferential surface having a second inner diameter formed smaller than the first inner diameter,

And the first inner circumferential surface and the second inner circumferential surface are formed stepped to form the oil transfer part.
The method of claim 3, wherein

The oil transfer unit is a vehicle drive module that is formed alternately in the axial direction along the circumferential direction of the hollow motor shaft ridges and valleys.
The method of claim 4, wherein

The height of the mountain is less than the pitch of the mountain, vehicle driving module for more than half the pitch of the mountain.
The method of claim 1,

The inner side surface of the hollow motor shaft is formed stepped to form the oil conveying portion, the oil conveying portion vehicle drive module having a scattering surface for transferring the oil in the gear device direction in accordance with the rotation of the motor.
The method of claim 1,

The oil transfer unit is formed on the inner circumference of the hollow motor shaft, the vehicle drive module including a spiral groove for guiding oil in the direction of the gearbox when the hollow motor shaft rotates.
The method of claim 7, wherein

The motor rotates the hollow motor shaft in the first rotation direction when the vehicle is advanced,

The spiral groove is a vehicle drive module for guiding oil to the gear device when the first rotational direction of rotation of the hollow motor shaft.
The method of claim 1,

The hollow motor shaft is formed with a stepped groove in the inner circumference of one end close to the gear device,

On the outer circumferential surface of the drive shaft is formed a protruding portion or stepped portion facing the groove portion to form the oil transfer unit.
The method of claim 9,

The oil transfer unit is a vehicle drive module having an oil scattering surface is formed alternately with the valley.
The method of claim 10,

The outer diameter of the oil transfer unit is

Smaller than the inner diameter of the groove,

Vehicle driving module larger than the inner diameter of the hollow motor shaft or the same as the inner diameter of the hollow motor shaft.
The method of claim 1,

The outer circumference of one end of the drive shaft close to the gear device is formed stepped to form the oil transfer part, and the oil transfer part has a scattering surface for transferring oil in the gear device direction according to the rotation of the motor. .
The method according to any one of claims 1 to 12,

A slip ring disposed closer to the other end of the hollow motor shaft opposite to one end close to the gear device;

Further comprising a brush assembly in contact with the slip ring,

And a plurality of blades formed in the slip ring to blow toward the brush assembly.
The method of claim 13,

The brush assembly includes a first brush and a second brush spaced apart from each other,

The slip ring may include a center guide facing the first brush and the second brush, a first side guide forming a space for receiving the center guide and the first lead wire in contact with the first brush, the center guide, and the first guide. A second side guide defining a space for receiving a second lead wire in contact with the second brush,

The plurality of blades is a vehicle drive module formed on at least one of the center guide, the first side guide and the second side guide.
The method of claim 14,

Each of the plurality of blades

A first section in which the distance between the outer edge and the rotation axis of the slip ring gradually increases toward the circumferential direction of the slip ring, and a second in which the distance between the outer edge and the rotation axis of the slip ring gradually decreases toward the circumferential direction of the slip ring; Vehicle drive module comprising a section.