CN213655686U

CN213655686U - Integrated central driving system

Info

Publication number: CN213655686U
Application number: CN202022571802.1U
Authority: CN
Inventors: 顾俊; 吴云峰
Original assignee: Zf Transmission Technology Jiaxing Co ltd
Current assignee: Zf Transmission Technology Jiaxing Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-07-09
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses an integrated form central drive system. The integrated central drive system includes: a motor module and a reducer module. The motor module includes a cover plate attached to a left end of the motor housing, a motor housing, and a motor accommodated inside the motor housing, the motor including a stator fixed to the motor housing, a rotor rotatably disposed inside the stator, and a motor output shaft fixed to the rotor, the cover plate having a bearing housing formed thereon, in which a first bearing for supporting the motor output shaft is mounted; the speed reducer module comprises a speed reducer shell and a speed reducer accommodated in the speed reducer shell, a lubricating oil channel is formed in the cover plate, and when the motor output shaft drives the speed reducer, the lubricating oil accommodated in the speed reducer shell is driven to flow to the first bearing through the lubricating oil channel, so that the first bearing is lubricated.

Description

Integrated central driving system

Technical Field

The utility model relates to an integrated form central drive system especially relates to an integrated form central drive system for new forms of energy vehicle.

Background

The existing integrated central driving system is characterized in that a speed reducing mechanism is introduced into a motor direct-drive system (namely, a motor output shaft is directly connected with a drive axle), and the same system output torque can be realized by using the reduced motor specification, so that the weight and the size of the motor are reduced, and the motor controller is also helped to reduce the specification of the motor controller.

However, as the motor speed increases, the requirements for system lubrication, particularly the lubrication of the motor bearings, increase. The conventional method is to lubricate the motor bearing by grease lubrication, and the method cannot meet the lubrication requirement of a high-speed bearing in an integrated central driving system. Therefore, the existing method needs to be improved, so that the integrated central driving system has the characteristic of simple structure, and meanwhile, the purpose that the motor bearing has better lubricating effect is achieved.

Disclosure of Invention

The utility model provides an integrated form central driving system to solve the lubricated problem of motor bearing among the integrated form central driving system.

An integrated central drive system comprising:

a motor module including a cover plate attached to one end of the motor housing, a motor housing, and a motor accommodated inside the motor housing, the motor including a stator fixed to the motor housing, a rotor rotatably disposed inside the stator, and a motor output shaft fixed to the rotor, the cover plate having a bearing housing formed thereon, in which a first bearing for supporting the motor output shaft is mounted;

a reducer module attached to the motor module, the reducer module including a reducer housing and a reducer housed within the reducer housing, the reducer housing being attached to the cover plate, the reducer being coupled to the motor output shaft,

and a lubricating oil channel is formed on the cover plate, and when the motor output shaft drives the speed reducer, the lubricating oil contained in the shell of the speed reducer is driven to flow to the first bearing through the lubricating oil channel on the cover plate.

Preferably, when the reducer is driven by the motor output shaft, the lubricating oil flows to a side of the first bearing close to the motor through the lubricating oil passage, and after lubricating the first bearing, the lubricating oil flows to the reducer side, flows through the first bearing, and returns to the reducer case, thereby forming a lubricating oil flow circuit.

Preferably, the reducer module further comprises a cooler disposed in the reducer housing, the cooler being configured to cool the lubricating oil in the reducer housing.

Preferably, a coolant passage for cooling the stator is integrally formed in the motor housing, and the cooler communicates with the coolant passage so that the coolant in the cooler flows together with the coolant in the coolant passage.

Preferably, the reduction gear case further includes a lubricant oil accommodating portion integrally formed at a bottom portion of the reduction gear case, and the cooler is disposed in the lubricant oil accommodating portion.

Preferably, the motor output shaft is further fixedly sleeved with an oil slinger, the oil slinger is adjacent to the first bearing and is positioned at one side of the first bearing, which is adjacent to the reducer module, one or more oil slinger holes communicated with two sides of the oil slinger are formed in the oil slinger, the oil slinger holes form a part of a lubricating oil flowing loop of the integrated central driving system, and when the motor output shaft drives the reducer, the lubricating oil flowing to the oil slinger is thrown back into the reducer housing through the oil slinger holes by the oil slinger.

Preferably, the gap between the oil slinger and the first bearing is set so that the level of lubricating oil between the oil slinger and the first bearing is not lower than the central axis of the motor output shaft.

Preferably, the oil slinger hole is an inclined hole, and a vertical distance between an inlet of the oil slinger hole adjacent to the motor and a central axis of the motor output shaft is smaller than a vertical distance between an outlet of the oil slinger hole adjacent to the speed reducer and the central axis of the motor output shaft.

Preferably, the cover plate is provided with a shaft hole located on one side of the bearing seat adjacent to the motor, a sealing element for preventing lubricating oil from entering the motor is fixedly arranged in the shaft hole of the cover plate, the motor output shaft is further fixedly sleeved with a wear-resistant shaft sleeve, the wear-resistant shaft sleeve movably penetrates through a through hole of the sealing element, and when the motor output shaft drives the speed reducer, the lubricating oil contained in the speed reducer shell is driven to flow to a gap between the first bearing and the sealing element through a lubricating oil channel on the cover plate.

Preferably, the bottom of the reducer housing is provided with an oil discharge hole and an oil discharge bolt arranged in the oil discharge hole.

Compared with the prior art, the beneficial effects of the utility model include at least:

the utility model discloses an among the integrated form central drive system, during motor output shaft drive reduction gear, the lubricating oil passageway that the drive holds in the reduction gear casing on the apron flows to first bearing department, lubricate first bearing, and motor output shaft's slew velocity is big more, the lubricating oil that flows to first bearing is more, thereby make first bearing obtain abundant lubrication, guarantee motor output shaft's even running, the design make full use of lubricating oil passageway has current integrated form central drive system's structure, the characteristics that the structure retrencied have.

Additionally, the utility model discloses an integrated form central driving system occupies the motor energy consumption when providing the circulating lubrication very little, compares and reduces by a wide margin in taking the lubricated motor consumption of oil pump, compares in the motor that does not take the oil pump self-lubricating, and lubricated effect is better.

Drawings

Fig. 1 is a cross-sectional view of an integrated central drive system according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion S in fig. 1.

In the figure: 1. an integrated central drive system; 10. a motor module; 11. a cover plate; 111. a lubricant oil passage; 12. a motor housing; 13. a stator; 14 a rotor; 15. an output shaft of the motor; 16. a baffle plate; 20. a retarder module; 21. a reducer housing; 211. a cooler; 212. an oil discharge hole; 30. a first bearing; 40. a second bearing; 50. an oil slinger; 51. an oil throwing hole; 60. a wear-resistant shaft sleeve; 70. a seal member; 80. oil discharge bolts; l1, static liquid level; l2, dynamic liquid level.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Before describing in detail, it is noted that the directional terms "left", "right", "upper", "lower" in the present disclosure are used with reference to the accompanying drawings, and are not intended to limit the scope of the present disclosure.

The embodiment of the utility model provides an integrated form central driving system 1. The integrated central drive system 1 can be applied to a hybrid vehicle or a pure electric vehicle. However, the application of the integrated central drive system 1 of the present invention is not limited thereto, and it can also be used for a central drive system of other vehicles (e.g., a ship, a train, or an aircraft, etc.).

Referring to fig. 1 and 2, the integrated central drive system 1 includes a motor module 10 and a reducer module 20. A decelerator module 20 is attached to one end of the motor module 10 for decelerating the output rotation speed of the motor and increasing the output torque of the motor. In addition, the integrated central drive system 1 may further comprise a terminal block module (not shown) for connection to the motor module 10 to provide power to the motor module 10. The components of the integrated central drive system 1 according to the present invention will be described in detail below with reference to the accompanying drawings.

The motor module 10 includes a cover plate (left end cover in the drawing) 11, a motor housing 12, and a motor accommodated inside the motor housing 12, and may further include a baffle plate (right end cover in the drawing) 16, the cover plate 11 and the baffle plate 16 being respectively located on left and right sides of the motor housing 12, the cover plate 11 may be attached to a left end of the motor housing 12 by a fastener (e.g., a bolt), and the baffle plate 16 may be attached to a right end of the motor housing 12 by a fastener (e.g., a bolt). The motor housing 12 may be manufactured by injection molding. The motor used by the integrated central driving system 1 of the present invention may be, for example, a three-phase asynchronous motor or a permanent magnet synchronous motor. The motor includes a motor stator 13 fixed to the motor housing 12, a motor rotor 14 rotatably disposed inside the motor stator 13, and a motor output shaft 15 fixed to the motor rotor 14. The cover plate 11 is formed with a bearing seat, which may be located at the center of the cover plate 11, in which a first bearing (a left bearing in the drawing) 30 (e.g., a deep groove ball bearing) for supporting the motor output shaft 15 is installed, the first bearing 30 may be used to support a portion of the motor output shaft 15 adjacent to the left end, and an inner ring of the first bearing 30 may be fixed on an outer surface of the motor output shaft 15 adjacent to the left end by interference fit. The baffle 16 may also be formed with a bearing seat, the bearing seat on the baffle 16 may be located at the center of the baffle 16, a second bearing (a right bearing in the drawing) 40 (for example, a deep groove ball bearing) for supporting the motor output shaft 15 is installed in the bearing seat on the baffle 16, the second bearing 40 may be used for supporting the right end of the motor output shaft 15, and an inner ring of the second bearing 40 may be fixed on an outer surface of the right end of the motor output shaft 15 by interference fit.

The retarder module 20 includes a retarder housing 21 and a retarder (not shown) accommodated in the retarder housing 21. The reducer housing 21 may be attached to the cover plate 11 of the motor module 10 by means of fasteners (e.g., bolts) at the left end of the motor module 10. One end of the motor output shaft 15 extends into the reducer module 20 so as to be coupled with a reducer, the reducer used in the present invention may be an existing reducer, for example, a planetary gear reduction mechanism, and the structure of the reducer may be a known structure, which is not described herein in detail.

The gear case 21 contains lubricating oil therein, and specifically, the gear case 21 further includes a lubricating oil containing portion integrally formed at the bottom of the gear case 21 for containing lubricating oil, and the static level of the lubricating oil in a static condition may be as shown by a line L1 in fig. 2. In one embodiment, the bottom of the reducer case 21 is provided with an oil discharge hole 212 and an oil discharge bolt 80 disposed in the oil discharge hole 212, and the lubricating oil can be periodically replaced using the oil discharge bolt 80.

The cover plate 11 is formed with a lubricant passage 111 for allowing the lubricant in the reducer case 21 to flow to the first bearing 30 and lubricate the first bearing 30, the lubricant passage 111 may be an inclined hole, the left end of the lubricant passage 111 is adjacent to the lubricant accommodating portion of the reducer case 21, the right end of the lubricant passage 111 is adjacent to the first bearing 30, and when the motor output shaft 15 drives the reducer, the lubricant accommodated in the reducer case 21 is driven to flow to the first bearing 30 through the lubricant passage 111 on the cover plate 11. Specifically, when the motor output shaft 15 drives the speed reducer, a gear (not shown) fixed at the left end of the motor output shaft 15 meshes with a gear in the speed reducer and stirs the lubricating oil in the speed reducer housing 21, the liquid level of the lubricating oil changes from a static liquid level shown by a line L1 in fig. 2 to a dynamic liquid level shown by a line L2, due to the dynamic liquid level and pressure balance of the lubricating oil, the lubricating oil contained in the speed reducer housing 21 flows to the first bearing 30 through the lubricating oil channel 111 and lubricates the first bearing 30, and the larger the rotation speed of the motor output shaft 15 is, the more the lubricating oil flows to the first bearing 30, so that the first bearing 30 is sufficiently lubricated, the smooth operation of the motor output shaft 15 is ensured, and the design of the lubricating oil channel 111 fully utilizes the structure of the existing integrated central driving system 1, and has the characteristic of simple structure.

The cover plate 11 is preferably further provided with a shaft hole, the shaft hole may be located in the center of the cover plate 11 and located on one side of the bearing seat on the cover plate 11, the sealing member 70 for preventing lubricating oil from entering into the motor is fixedly disposed in the shaft hole of the cover plate 11, the sealing member 70 is, for example, a shaft seal, the motor output shaft 15 is further fixedly sleeved with a wear-resistant shaft sleeve 60, the wear-resistant shaft sleeve 60 may be fixed on the outer surface of the motor output shaft 15 through interference fit, the wear-resistant shaft sleeve 60 movably passes through the through hole of the sealing member 70, the wear-resistant shaft sleeve 60 may prevent the motor output shaft 15 from directly contacting with the sealing member 70, the service life of the motor output shaft 15 is prolonged, when the motor output shaft 15 drives the speed reducer, the lubricating oil contained in the speed reducer casing is driven to flow to the gap between the first bearing 30, the abrasion between the wear-resistant shaft sleeve 60 and the sealing element 70 is reduced, the service lives of the wear-resistant shaft sleeve 60 and the sealing element 70 are prolonged, and the sealing element 70 keeps better sealing performance.

In some embodiments of the present invention, when the motor output shaft 15 drives the speed reducer, the lubricant oil flows to one side of the first bearing 30 close to the motor via the lubricant oil channel 111, after lubricating the first bearing 30, the lubricant oil flows to one side of the speed reducer, flow through the first bearing 30 and then return to the inside of the speed reducer casing 21 again, and form a lubricant oil flowing loop, specifically, the lubricant oil flowing to the first bearing 30 can exchange heat with the first bearing 30, which is in friction, the wear-resistant shaft sleeve 60 and the sealing member 70, the lubricant oil after heat exchange passes through the first bearing 30 and returns to the inside of the speed reducer casing 21 again, while lubricating the components of the integrated central driving system, the heat is also taken away, the temperature of the above components is reduced, and the better performance is maintained.

In some embodiments of the present invention, the retarder module 20 further includes a cooler 211 disposed inside the retarder housing 21, the cooler 211 being used for cooling the lubricating oil inside the retarder housing 21. Specifically, the cooler 211 contacts with the lubricant oil and performs heat exchange to take away heat of the lubricant oil, thereby reducing the temperature of the lubricant oil, maintaining the lubricant oil with a better lubricating effect and continuously taking away heat generated by friction, and enabling the lubricant oil flowing loop to be an oil cooling loop at the same time. The cooler 211 is preferably disposed in the lubricant oil receiving portion so that the cooler 211 can be in continuous contact with and exchange heat with the lubricant oil in the reduction gear case 21, and preferably takes away heat of the lubricant oil. The integrated central drive system 1 may also include coolant passages (not shown, so-called "water jackets") integrally formed within the motor housing 12, the coolant passages being connected to an external coolant pump (not shown) and a radiator (not shown). A coolant channel may be formed in the motor housing 12 in the form of a helical duct along which coolant flows around the outer circumference of the motor in order to cool the stator 13 of the motor. The cooler 211 communicates with a coolant passage in the motor housing 12, and the coolant in the cooler 211 flows together with the coolant in the coolant passage, thereby continuously taking away heat generated by heat exchange.

The utility model discloses in some embodiments, fixed cover is equipped with oil slinger 50 on the motor output shaft 15, oil slinger 50 is close to first bearing 30 and is located one side of the adjacent reduction gear module 20 of first bearing 30, specifically, be provided with the oil slinger hole 51 of one or more intercommunication oil slinger 50 both sides on oil slinger 50, a plurality of oil slingers hole 51 can equidistant interval set up on oil slinger 50, oil slinger hole 51 constitutes the partly of the lubricating oil flow return circuit of integrated form central drive system 1, when motor output shaft 15 drives the reduction gear, oil slinger hole 51 gets rid of the lubricating oil that holds in oil slinger 50 under the effect of centrifugal force and gets back to in reduction gear housing 21, form lubricating oil flow return circuit, oil slinger 50 can promote the flow of lubricating oil in the above-mentioned lubricating oil flow return circuit, improve the lubrication and the cooling effect of lubricating oil.

The smaller the gap between the oil slinger 50 and the first bearing 30 is, the more favorable the lubricating oil between the oil slinger 50 and the first bearing 30 enters the oil slinger hole 51, as a preferable mode, the gap between the oil slinger 50 and the first bearing 30 is set to make the liquid level of the lubricating oil between the oil slinger 50 and the first bearing 30 not lower than the central axis of the motor output shaft 15, so that the oil slinger 50 can throw enough lubricating oil in the rotation process, the oil slinger hole 51 is preferably an inclined hole, the vertical distance between the inlet of the oil slinger hole 51 adjacent to the motor side and the central axis of the motor output shaft 15 is smaller than the vertical distance between the outlet of the oil slinger hole 51 adjacent to the reducer side and the central axis of the motor output shaft 15, compared with the left end of the oil slinger hole 51 as the outlet, the right end of the oil slinger hole 51 as the inlet is closer to the motor output shaft 15, the lubricating oil between the oil slinger 50, thereby promoting the flow of the lubricating oil.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and all such changes are intended to be within the scope of the following claims.

Claims

1. An integrated central drive system comprising:

the speed reducer is characterized in that a lubricating oil channel is formed in the cover plate, and when the motor output shaft drives the speed reducer, lubricating oil contained in a shell of the speed reducer is driven to flow to the first bearing through the lubricating oil channel in the cover plate.

2. The integrated central drive system according to claim 1, wherein when the reducer is driven by the motor output shaft, the lubricant oil flows to a side of the first bearing close to the motor through the lubricant oil passage, and after lubricating the first bearing, the lubricant oil flows to the reducer side, flows through the first bearing, and returns to the reducer housing, thereby forming a lubricant oil flow circuit.

3. The integrated central drive system of claim 2, wherein the retarder module further comprises a cooler disposed within the retarder housing for cooling lubricating oil within the retarder housing.

4. The integrated central drive system according to claim 3, wherein a coolant passage for cooling the stator is integrally formed in the motor housing, and the cooler communicates with the coolant passage so that the coolant in the cooler flows together with the coolant in the coolant passage.

5. The integrated central drive system of claim 3, wherein the retarder housing further includes a lubrication receptacle integrally formed at a bottom of the retarder housing, the cooler being disposed within the lubrication receptacle.

6. The integrated central drive system according to claim 2, wherein the motor output shaft is further fixedly sleeved with an oil slinger adjacent to the first bearing and on a side of the first bearing adjacent to the retarder module, the oil slinger being provided with one or more oil slinger holes communicating with both sides of the oil slinger, the oil slinger holes forming part of the lubricating oil flow circuit of the integrated central drive system, the oil slinger slinging the lubricating oil flowing to the oil slinger back into the retarder housing through the oil slinger holes when the motor output shaft drives the retarder.

7. The integrated central drive system of claim 6, wherein the clearance between the oil slinger and the first bearing is such that a level of lubricating oil between the oil slinger and the first bearing is no lower than the central axis of the motor output shaft.

8. The integrated central drive system according to claim 6, wherein the oil slinger hole is an inclined hole, and a vertical distance between an inlet of the oil slinger hole on a side adjacent to the motor and a central axis of the motor output shaft is smaller than a vertical distance between an outlet of the oil slinger hole on a side adjacent to the decelerator and the central axis of the motor output shaft.

9. The integrated central drive system according to claim 1, wherein the cover plate is formed with an axial hole at a side of the bearing seat adjacent to the motor, a sealing member for preventing lubricant from entering the motor is fixedly disposed in the axial hole of the cover plate, the motor output shaft is further fixedly sleeved with a wear-resistant bushing, the wear-resistant bushing movably penetrates through the through hole of the sealing member, and the motor output shaft drives the reducer to drive the lubricant contained in the reducer housing to flow to the gap between the first bearing and the sealing member through the lubricant passage of the cover plate.

10. The integrated central drive system of claim 1, wherein the bottom of the reducer case is provided with an oil discharge hole and an oil discharge bolt disposed in the oil discharge hole.