Oil way system of driving assembly

Abstract

The invention discloses an oil way system of a driving assembly, which comprises an oil pump, an oil cooler, a driving motor oil way, a speed reducing system oil way, a generator oil way and a speed increasing system oil way, the oil pump pumps oil into the oil cooler, the oil cooler cools the oil, the oil pump and the oil cooler are both arranged on a main shell, the oil way system also comprises a distribution oil cavity and a switch electromagnetic valve, the distribution oil cavity is arranged in the main shell, the oil cooler conveys cooled oil into the distribution oil cavity, the distribution oil cavity comprises a first oil cavity and a second oil cavity, the first oil cavity is communicated with a driving motor oil way and a speed reducing system oil way, and the second oil cavity is communicated with a generator oil way and a speed increasing system oil way; the switch electromagnetic valve is arranged between the first oil cavity and the second oil cavity, and when the switch electromagnetic valve is opened, oil flows into the second oil cavity from the first oil cavity; and when the switch electromagnetic valve is closed, the first oil cavity and the second oil cavity are cut off. On-off of the generator oil way and the speed increasing system oil way is controlled through the on-off electromagnetic valve, under the working condition that the generator does not need to work, the generator oil way and the speed increasing system oil way are closed, the flow resistance of the oil way system is reduced, the working power of the oil pump is reduced, and the working efficiency of the lubricating and cooling system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile drive assemblies, and in particular to an oil circuit system of a drive assembly. Background Art

[0002] The oil circuit system of the automobile's drive assembly includes the layout of the cooling oil circuit and the lubricating oil circuit. The oil cooling circuit cools the various parts of the drive assembly by direct spraying, and the lubricating oil circuit ensures the smooth operation and efficient performance of each part by transporting oil to the various components of the drive assembly.

[0003] The drive assembly of a hybrid vehicle usually includes an engine, a generator and a drive motor. The engine is used to directly drive the wheels, or drive the generator to generate electricity, which is then supplied to the drive motor, which is used to drive the wheels.

[0004] The existing oil system needs to cool and lubricate the generator, drive motor, reducer and speed increaser. When the generator is not working, if the generator is continuously cooled and lubricated, the system oil resistance and oil pump power consumption will increase, and the working efficiency of the oil pump system and assembly will be reduced.

[0005] Therefore, it is necessary to design an oil circuit system for the drive assembly that can reduce system oil resistance and oil pump power consumption and improve the working efficiency of the generator. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an oil circuit system that can reduce system oil resistance and oil pump power consumption and improve the working efficiency of the oil pump system.

[0007] The technical solution of the present invention provides an oil circuit system of a drive assembly, comprising an oil pump, an oil cooler, a drive motor oil circuit, a reduction system oil circuit, a generator oil circuit and a speed increasing system oil circuit, wherein the oil pump pumps oil into the oil cooler, and the oil cooler cools the oil, wherein the drive assembly comprises a main housing, a front end cover and a rear end cover, wherein the oil pump and the oil cooler are both mounted on the main housing, and further comprises an oil distribution chamber and a switch solenoid valve, wherein the oil distribution chamber is arranged in the main housing, and the oil cooler delivers cooled oil to the oil distribution chamber, wherein the oil distribution chamber comprises a first oil chamber and a second oil chamber, wherein the first oil chamber is connected to the drive motor oil circuit and the reduction system oil circuit, and the second oil chamber is connected to the generator oil circuit and the speed increasing system oil circuit;

[0008] The switch solenoid valve is arranged between the first oil chamber and the second oil chamber, and when the switch solenoid valve is opened, the oil flows from the first oil chamber into the second oil chamber;

[0009] When the switch solenoid valve is closed, the first oil chamber and the second oil chamber are cut off.

[0010] Further, the main housing includes a drive motor cavity, a generator cavity and a gear cavity, the drive motor cavity is used to install the drive motor, the generator cavity is used to install the generator, and the gear cavity is used to install the reducer and the speed increaser;

[0011] The drive motor cavity and the generator cavity are arranged on one side of the rear end cover, the gear cavity is arranged on one side of the front end cover, the distribution oil cavity is arranged between the drive motor cavity and the generator cavity, the first oil cavity leads to the drive motor cavity, and the second oil cavity leads to the generator cavity.

[0012] Further, the drive motor oil circuit includes a drive motor rotor cooling branch, and the drive motor rotor cooling branch includes a first oil hole, a first oil channel and a second oil channel, the first oil hole, the first oil channel and the second oil channel are all arranged on the rear end cover, the first oil hole is connected to the first oil chamber, one end of the first oil channel is connected to the first oil hole, one end of the second oil channel is connected to the first oil channel, and the other end is connected to the first hollow channel of the rotor shaft of the drive motor.

[0013] Furthermore, the drive motor oil circuit also includes a drive motor stator cooling branch, and the drive motor stator cooling branch includes a second oil hole and a first annular oil channel, the second oil hole connects the first oil cavity and the first annular oil channel, and the first annular oil channel is arranged in a circle on the inner wall of the drive motor cavity.

[0014] Furthermore, the front end cover includes a differential bearing slot, a drive motor bearing slot, an intermediate bearing slot and an engine input bearing slot;

[0015] The deceleration system oil circuit includes a third oil passage, a fourth oil passage, a fifth oil passage and a sixth oil passage. The third oil passage is arranged in the main housing, one end of the third oil passage is connected with the annular oil passage and extends into the gear chamber, the fourth oil passage, the fifth oil passage and the sixth oil passage are all arranged in the front end cover, the other end of the third oil passage is directly connected with the fourth oil passage and the fifth oil passage, the fourth oil passage leads to the differential bearing groove, the fifth oil passage leads to the drive motor bearing groove, one end of the sixth oil passage is connected with the fifth oil passage, and the other end leads to the engine input bearing groove.

[0016] Furthermore, the deceleration system oil circuit also includes a seventh oil channel, the seventh oil channel connects the drive motor bearing groove and the intermediate bearing groove, and the drive motor bearing groove is located above the intermediate bearing groove.

[0017] Furthermore, the generator oil circuit includes a third oil hole and a second annular oil passage, the third oil hole connects the second oil cavity and the second annular oil passage, and the second annular oil passage is arranged on a circle of the inner wall of the generator cavity.

[0018] Furthermore, the gear cavity includes a drive motor input bearing mounting position, an intermediate bearing mounting position, a differential bearing mounting position, an engine input bearing mounting position and a generator bearing mounting position, a speed-increasing bearing is mounted at the generator bearing mounting position, and a speed-increasing gear is mounted on the generator bearing mounting position and the engine input bearing mounting position;

[0019] The speed increasing system oil circuit includes an eighth oil channel and an oil pipe, one end of the eighth oil channel is connected to the second annular oil channel, the eighth oil channel extends from the generator chamber to the gear chamber, the other end of the eighth oil channel is located above the engine input bearing mounting position and is connected to the oil pipe, a plurality of oil spray holes are provided on the oil pipe, and the oil spray holes spray oil onto the gear surface of the speed increasing gear and the speed increasing bearing.

[0020] Furthermore, it also includes an engine input shaft lubricating oil circuit, which includes a ninth oil channel, and the ninth oil channel is directly connected to the oil pump. The ninth oil channel leads to the engine input bearing mounting position of the gear chamber and is connected to the second hollow channel of the engine input shaft.

[0021] Furthermore, an electromagnetic clutch push ring and a needle bearing are installed on the engine input shaft, and a first branch oil channel and a second branch oil channel are radially provided on the second hollow channel, the first branch oil channel leads to the electromagnetic clutch push ring, and the second branch oil channel leads to the needle bearing.

[0022] Furthermore, a drive motor oil return groove is provided on one side of the intermediate bearing mounting position in the gear cavity, the drive motor oil return groove is connected to the drive motor cavity, an oil baffle slope is provided below the drive motor oil return groove, and the oil baffle slope extends to below the intermediate bearing mounting position.

[0023] After adopting the above technical solution, the following beneficial effects are achieved:

[0024] The present invention controls the on-off of the generator oil circuit and the speed increasing system oil circuit by switching the solenoid valve. When the generator does not need to work, the generator oil circuit and the speed increasing system oil circuit are closed, thereby reducing the flow resistance of the oil circuit system, reducing the working power of the oil pump, and improving the working efficiency of the lubrication and cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0026] Figure 1 is a three-dimensional diagram of a drive assembly in one embodiment of the present invention;

[0027] Figure 2 is a rear view of the drive assembly in one embodiment of the present invention with the rear end cover omitted;

[0028] Figure 3 is a schematic diagram of an oil circuit system of a drive assembly in one embodiment of the present invention;

[0029] Figure 4 is a three-dimensional diagram of a transmission mechanism of a drive assembly in one embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the flow direction of oil in the main housing through the first oil chamber in one embodiment of the present invention;

[0031] Figure 6 It is a partial enlarged view of the oil distribution chamber in one embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of the inner side of the rear end cover in one embodiment of the present invention;

[0033] Figure 8 is a schematic diagram of the outer side of the rear end cover in one embodiment of the present invention;

[0034] Fig. 9 is a three-dimensional diagram of a rear end cover in one embodiment of the present invention;

[0035] Fig.10 is a cross-sectional view of a driving motor in one embodiment of the present invention;

[0036] Fig.11 is a schematic diagram of a stator cooling branch of a drive motor in one embodiment of the present invention;

[0037] Fig.12 is a partial enlarged view of a driving motor cavity in one embodiment of the present invention;

[0038] Fig.13 is a schematic diagram of a gear chamber in one embodiment of the present invention;

[0039] Fig.14 is a schematic diagram of the inner side of the front end cover in one embodiment of the present invention;

[0040] Fig.15 is a schematic diagram of the outer side surface of the front end cover in one embodiment of the present invention;

[0041] Fig.16 It is a partial enlarged view of the bearing groove of the driving motor in one embodiment of the present invention;

[0042] Fig.17 is a three-dimensional view of a front end cover in one embodiment of the present invention;

[0043] Fig.18 is a schematic diagram of a sixth oil passage and a seventh oil passage in one embodiment of the present invention;

[0044] Fig.19 is a partial enlarged view of a differential bearing groove in one embodiment of the present invention;

[0045] Fig. 20 is a schematic diagram of the flow direction of oil in the main housing through the second oil chamber in one embodiment of the present invention;

[0046] Fig.21 is a schematic diagram of a generator oil circuit in one embodiment of the present invention;

[0047] Fig. 22 is a schematic diagram of an eighth oil passage located in the second annular oil passage in one embodiment of the present invention;

[0048] Fig.23 is a schematic diagram of an eighth oil passage located in the main housing in one embodiment of the present invention;

[0049] Fig.24 is a schematic diagram of an eighth oil passage located in a gear chamber in an embodiment of the present invention;

[0050] Fig.25 is a schematic diagram of an oil pipe in a gear cavity in one embodiment of the present invention;

[0051] Fig.26 is a schematic diagram of a ninth oil passage in the main housing in one embodiment of the present invention;

[0052] Fig. 27 is a schematic diagram of a ninth oil passage in an engine input bearing installation position in one embodiment of the present invention;

[0053] Fig.28 sectional view of an engine input shaft in one embodiment of the present invention Figure 1 ;

[0054] Fig.29 sectional view of an engine input shaft in one embodiment of the present invention Figure 2 .

[0055] Reference table of reference numerals:

[0056] Driving motor 10, generator 20, speed reducer 30, speed increaser 40, first hollow channel 101, intermediate shaft system 301, differential 302, speed increaser bearing 401, speed increaser gear 402, engine input shaft 501, electromagnetic clutch 502, needle bearing 503, direct drive gear 504, second hollow channel 505, first branch oil passage 5051, second branch oil passage 5052;

[0057] Oil pump 1, oil cooler 2;

[0058] Main housing 3: distribution oil chamber 31, drive motor chamber 32, generator chamber 33, gear chamber 34, third oil passage 35, ninth oil passage 36, first oil chamber 311, second oil chamber 312, second oil hole 321, first annular oil passage 322, third oil hole 331, second annular oil passage 332, eighth oil passage 333, notch 340, drive motor input bearing mounting position 341, intermediate bearing mounting position 342, differential bearing mounting position 343, engine input bearing mounting position 344, generator bearing mounting position 345, drive motor oil return groove 346, oil blocking inclined surface 347, second arc-shaped flange 348, second boss 349;

[0059] Front end cover 4: differential bearing groove 41, drive motor bearing groove 42, intermediate bearing groove 43, engine input bearing groove 44, fourth oil passage 45, fifth oil passage 46, sixth oil passage 47, seventh oil passage 48, first arc-shaped flange 49, bearing lubrication oil guide groove 471, first boss 490;

[0060] Rear end cover 5: first oil hole 51, first oil passage 52, second oil passage 53, drive motor cover 54, generator cover 55;

[0061] Switch solenoid valve 6 and oil pipe 7. DETAILED DESCRIPTION

[0062] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0063] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the invention.

[0064] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0065] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the oil circuit system of the drive assembly includes an oil pump 1, an oil cooler 2, a drive motor oil circuit, a reduction system oil circuit, a generator oil circuit and a speed increasing system oil circuit. The oil pump 1 pumps the oil into the oil cooler 2, and the oil cooler 2 cools the oil. The drive assembly includes a main housing 3, a front cover 4 and a rear cover 5. The oil pump 1 and the oil cooler 2 are both installed on the main housing 3, and also include a distribution oil chamber 31 and a switch solenoid valve 6. The distribution oil chamber 31 is arranged in the main housing 3. The oil cooler 2 transports the cooled oil to the distribution oil chamber 31. The distribution oil chamber 31 includes a first oil chamber 311 and a second oil chamber 312. The first oil chamber 311 is connected to the drive motor oil circuit and the reduction system oil circuit, and the second oil chamber 312 is connected to the generator oil circuit and the speed increasing system oil circuit.

[0066] The switch solenoid valve 6 is disposed between the first oil chamber 311 and the second oil chamber 312. When the switch solenoid valve 6 is opened, the oil flows from the first oil chamber 311 into the second oil chamber 312.

[0067] When the switch solenoid valve 6 is closed, the first oil chamber 311 and the second oil chamber 312 are cut off.

[0068] Specifically, Figure 1 As shown, the drive assembly includes a main housing 3 and a rear end cover 5, and the rear end cover 5 is provided on the rear side of the main housing 3. An oil pump 1 and an oil cooler 2 are installed on the main housing 3. The oil pump 1 is used to pump oil into the oil cooler 2, and the oil cooler 2 is used to cool the oil. The oil cooler 2 performs heat exchange by water cooling.

[0069] like Figure 2 As shown, Figure 2 The rear end cover 5 is omitted, and a distribution oil chamber 31 is provided in the main housing 3. The distribution oil chamber 31 is connected to the oil cooler 2, and the oil cooler 2 delivers oil to the distribution oil chamber 31. The distribution oil chamber 31 includes a first oil chamber 311 and a second oil chamber 312. The first oil chamber 311 is connected to the drive motor oil circuit and the reduction system oil circuit. Figure 2 The middle drive motor 10 is located on the right side of the first oil chamber 311, the drive motor oil circuit is arranged in the drive motor chamber 32 of the main housing 3, and the reduction system oil circuit is arranged in the gear chamber 34 on the front side of the main housing 3 (see Fig.13 The second oil chamber 312 is connected to the generator oil circuit and the speed increasing system oil circuit. Figure 2The middle generator 20 is located on the left side of the second oil chamber 312, the generator oil circuit is arranged in the generator chamber 33 of the main housing 3, and the speed increasing system oil circuit is arranged in the gear chamber 34 on the front side of the main housing 3 (see Fig.13 )middle.

[0070] The first oil chamber 311 is not controlled by the switch solenoid valve 6, and the first oil chamber 311 maintains continuous cooling and lubrication of the drive motor oil circuit and the deceleration system oil circuit. Figure 5 and Figure 6 As shown, the black arrow indicates the flow direction of the oil. The oil is pumped from the oil pump 1 into the oil cooler 2, then enters the first oil chamber 311 from the oil cooler 2, and then enters the drive motor oil circuit and the reduction system oil circuit from the first oil chamber 311.

[0071] like Fig. 20 As shown, the black arrow indicates the flow direction of the oil. The oil is pumped from the oil pump 1 into the oil cooler 2, then enters the second oil chamber 312 from the oil cooler 2, and then enters the generator oil circuit and the speed increasing system oil circuit from the second oil chamber 312.

[0072] like Figure 2 As shown, a switch solenoid valve 6 is installed between the first oil chamber 311 and the second oil chamber 312 , and the switch solenoid valve 6 is used to control the on-off between the first oil chamber 311 and the second oil chamber 312 .

[0073] like Figure 3 As shown, the control current is used to control the opening or closing of the switch solenoid valve 6. When the switch solenoid valve 6 is opened, the oil flows from the first oil chamber 311 into the second oil chamber 312, and then enters the generator oil circuit and the speed increasing system oil circuit to cool the stator and the speed increasing gear 40 of the generator 20. When the switch solenoid valve 6 is closed, the oil circuit between the first oil chamber 311 and the second oil chamber 312 is disconnected, and the oil does not enter the generator oil circuit and the speed increasing system oil circuit. The switch solenoid valve 6 is closed, usually in the pure electric mode of the vehicle, at which time the generator 20 does not work, and the cooling and lubrication of the generator oil circuit and the speed increasing system oil circuit are stopped, thereby reducing the flow resistance of the oil circuit system, reducing the working power of the oil pump, and improving the working efficiency of the lubrication and cooling system.

[0074] Furthermore, if Figure 4-Figure 5 and Fig.13 As shown, the main housing 3 includes a drive motor chamber 32, a generator chamber 33 and a gear chamber 34. The drive motor chamber 32 is used to install the drive motor 10, the generator chamber 33 is used to install the generator 20, and the gear chamber 34 is used to install the reducer 30 and the speed increaser 40;

[0075] The drive motor cavity 32 and the generator cavity 33 are arranged on one side of the rear end cover 5, the gear cavity 34 is arranged on one side of the front end cover 4, the distribution oil cavity 31 is arranged between the drive motor cavity 32 and the generator cavity 33, the first oil cavity 311 leads to the drive motor cavity 32, and the second oil cavity 312 leads to the generator cavity 33.

[0076] Specifically, Figure 4 As shown, the transmission mechanism of the drive assembly includes a drive motor 10 (see Figure 2 ), generator 20, reducer 30 and speed increaser 40. Figure 4 The driving motor 10 is omitted, and the driving motor 10 is actually connected to the reducer 30 by transmission, and the generator 20 is connected to the speed increaser 40 by transmission. Wherein, the speed reducer 30 includes an intermediate shaft system 301 and a differential 302. The driving motor 10 transmits power to the differential 302 through the intermediate shaft system 301, and the differential 302 is used to connect with the external wheel shaft to transmit power to the wheel shaft. The speed increaser 40 includes a speed increaser bearing 401 and a speed increaser gear 402, wherein the speed increaser bearing 401 and a speed increaser gear 402 are coaxially connected to the generator 20, and the other speed increaser gear 402 is coaxially connected to the engine input shaft 501, the electromagnetic clutch 502 and the direct drive gear 504, and the two speed increaser gears 402 are meshed. The engine (not shown) can drive the generator 20 to generate electricity through the engine input shaft 501 and the speed increaser gear 402. In addition, the direct drive gear 504 is drivingly connected to the intermediate shaft system 301 , and the engine can directly drive the wheel axle through the engine input shaft 501 , the direct drive gear 504 , the intermediate shaft system 301 and the differential 302 .

[0077] like Figure 5 As shown, the rear side of the main housing 3 includes a drive motor cavity 32 and a generator cavity 33. The drive motor cavity 32 is used to install the drive motor 10, and the generator cavity 33 is used to install the generator 20. Figure 8 As shown, the rear end cover 5 is used to cover the rear side of the main housing 3.

[0078] like Fig.13 As shown, the front side of the main housing 3 includes a gear chamber 34, and the gear chamber 34 is used to install the reducer 30 and the speed increaser 40. Fig.14 As shown, the front end cover 4 is used to cover the front side of the main housing 3.

[0079] Furthermore, if Figure 7-10As shown, the drive motor oil circuit includes a drive motor rotor cooling branch, and the drive motor rotor cooling branch includes a first oil hole 51, a first oil channel 52 and a second oil channel 53. The first oil hole 51, the first oil channel 52 and the second oil channel 53 are all arranged on the rear end cover 5. The first oil hole 51 is connected to the first oil chamber 311, one end of the first oil channel 52 is connected to the first oil hole 51, one end of the second oil channel 53 is connected to the first oil channel 52, and the other end is connected to the first hollow channel 101 of the rotor shaft of the drive motor 10.

[0080] Specifically, Figure 7 As shown, the rear end cover 5 includes a drive motor cover 54 and a generator cover 55. The drive motor cover 54 covers the outside of the drive motor 10 and is arranged centrally with the drive motor 10. The generator cover 55 covers the outside of the generator 20 and is arranged centrally with the generator 20. A first oil hole 51 is provided on the inner side surface of the rear end cover 5, and the first oil hole 51 is communicated with the first oil chamber 311.

[0081] like Figure 8 As shown, the first oil passage 52 and the second oil passage 53 are both arranged inside the rear end cover 5, wherein the first oil hole 51 is directly connected to one end of the first oil passage 52, the first oil passage 52 extends obliquely downward, and the other end of the first oil passage 52 is blocked. Fig. 9 As shown, the lower end of the second oil passage 53 is connected to the first oil passage 52 , and the upper end leads to the center of the drive motor cover 54 , and the center of the drive motor cover 54 just corresponds to the rotor shaft of the drive motor 10 .

[0082] like Fig.10 As shown, the upper end of the second oil passage 53 is connected to the first hollow passage 101 of the rotor shaft of the drive motor 10, and can bring oil into the rotor shaft of the drive motor 10. The rotor shaft is provided with a plurality of radial oil holes (not shown). When the rotor shaft rotates, the oil enters the radial oil holes from the first hollow passage 101, and then enters the rotor from the radial oil holes to cool the rotor. When the rotor rotates, the oil is thrown toward the stator winding to cool the stator winding. The oil at the stator winding drips onto the rear bearing of the motor to lubricate the rear bearing of the motor. Fig.10 The direction of the black arrow in the figure indicates the flow path of the oil.

[0083] Furthermore, if Fig.11 As shown, the drive motor oil circuit also includes a drive motor stator cooling branch, and the drive motor stator cooling branch includes a second oil hole 321 and a first annular oil channel 322. The second oil hole 321 connects the first oil chamber 311 and the first annular oil channel 322. The first annular oil channel 322 is arranged on the inner wall of the drive motor chamber 32.

[0084] Among them, the second oil hole 321 and the first annular oil passage 322 are both arranged inside the main housing 3, the second oil hole 321 connects the first oil chamber 311 and the first annular oil passage 322, and the first annular oil passage 322 is a groove opened in a full circle on the inner wall of the drive motor chamber 32. The oil flows from the first oil chamber 311 into the second oil hole 321, then flows from the second oil hole 321 into the first annular oil passage 322, and then flows from the first annular oil passage 322 around the inner wall of the entire drive motor chamber 32. The first annular oil passage 322 corresponds to the stator of the drive motor 10, so the oil flows into the stator of the drive motor 10 to cool the stator.

[0085] Therefore, both the rotor and the stator of the drive motor 10 are cooled by the drive motor rotor cooling branch and the drive motor stator cooling branch.

[0086] Furthermore, if Figure 12-Figure 15 As shown, the front end cover 4 includes a differential bearing slot 41, a drive motor bearing slot 42, an intermediate bearing slot 43 and an engine input bearing slot 44;

[0087] The oil circuit of the reduction system includes a third oil passage 35, a fourth oil passage 45, a fifth oil passage 46 and a sixth oil passage 47. The third oil passage 35 is arranged in the main housing 3. One end of the third oil passage 35 is connected to the first annular oil passage 322 and extends into the gear chamber 34. The fourth oil passage 45, the fifth oil passage 46 and the sixth oil passage 47 are all arranged in the front end cover 4. The other end of the third oil passage 35 is directly connected to the fourth oil passage 45 and the fifth oil passage 46. The fourth oil passage 45 leads to the differential bearing groove 41, the fifth oil passage 46 leads to the drive motor bearing groove 42, one end of the sixth oil passage 47 is connected to the fifth oil passage 46, and the other end leads to the engine input bearing groove 44.

[0088] Specifically, Fig.12 As shown, one end of the third oil passage 35 is disposed in the first annular oil passage 322 , and the oil in the first annular oil passage 322 can flow into the third oil passage 35 .

[0089] like Fig.13 As shown, the third oil passage 35 passes through the driving motor chamber 32 , and the other end of the third oil passage 35 extends to the edge of the gear chamber 34 on the front side of the main housing 3 .

[0090] like Fig.14 As shown, one end opening of the fourth oil passage 45 is located on the inner side of the front end cover 4 and is just butted against the other end of the third oil passage 35 .

[0091] like Fig.15As shown, the fourth oil passage 45, the fifth oil passage 46 and the sixth oil passage 47 are all arranged inside the front end cover 4, and the fourth oil passage 45 overlaps with one end of the fifth oil passage 46, so the other end of the third oil passage 35 is directly connected to the fourth oil passage 45 and the fifth oil passage 46, and the fifth oil passage 46 is connected to the sixth oil passage 47. Among them, the fourth oil passage 45 leads to the differential bearing groove 41, the fifth oil passage 46 leads to the drive motor bearing groove 42, and the sixth oil passage 47 leads to the engine input bearing groove 44. Fig.15 The black arrow in the middle indicates the flow direction of the oil. The fourth oil passage 45 , the fifth oil passage 46 and the sixth oil passage 47 are actually all arranged inside the front end cover 4 , and only a partial outline can be seen from the outer side of the front end cover 4 .

[0092] like Fig.17 As shown, a differential bearing slot 41 , a drive motor bearing slot 42 , an intermediate bearing slot 43 and an engine input bearing slot 44 are provided on the inner side surface of the front end cover 4 .

[0093] like Fig.16 As shown, the other end of the fifth oil passage 46 leads to the drive motor bearing groove 42 , so as to cool the bearing of the drive motor 10 .

[0094] like Fig.18 As shown, the other end of the sixth oil passage 47 leads to the engine input bearing groove 44, which can cool the bearing of the engine input shaft 501. In addition, the oil outlet on the engine input bearing groove 44 of the sixth oil passage 47 is opened in the upper right area, so that the oil can be sprayed to the left to cool the left half of the coil of the electromagnetic clutch 502, and can also be cooled to the right along the coil surface under the action of gravity.

[0095] like Fig.18 As shown, the first oil passage 47 is provided with a bearing lubrication oil guide groove 471 radially downward, which can guide oil into the bearing for lubrication.

[0096] like Fig.19 As shown, the other end of the fourth oil passage 45 leads to the differential bearing groove 41 , so as to cool the bearing of the transmission 30 .

[0097] Furthermore, if Fig.17 and Fig.18 As shown, the reduction system oil circuit also includes a seventh oil passage 48 , which connects the drive motor bearing groove 42 with the middle bearing groove 43 , and the drive motor bearing groove 42 is located above the middle bearing groove 43 .

[0098] Specifically, Fig.17 As shown, one end of the seventh oil passage 48 is disposed at the lower portion of the drive motor bearing groove 42 .

[0099] like Fig.18As shown, the seventh oil passage 48 connects the drive motor bearing groove 42 and the intermediate bearing groove 43, and the other end of the seventh oil passage 48 leads to the intermediate bearing groove 43. The oil in the drive motor bearing groove 42 can be introduced into the intermediate bearing groove 43 to cool the bearing of the intermediate shaft system 301.

[0100] Therefore, the various bearings mounted on the front end cover 4 can be cooled and lubricated by arranging the oil circuit of the speed reduction system.

[0101] Furthermore, if Figure 20-21 As shown, the generator oil circuit includes a third oil hole 331 and a second annular oil passage 332 . The third oil hole 331 connects the second oil chamber 312 with the second annular oil passage 332 . The second annular oil passage 332 is arranged on a circle of the inner wall of the generator chamber 33 .

[0102] Specifically, Fig. 20 The black arrow in the figure indicates the flow direction of the oil. The oil flows from the oil pump 1 into the oil cooler 2, and then flows from the oil cooler 2 into the first oil chamber 311. When the switch solenoid valve 6 is turned on, the oil flows from the first oil chamber 311 into the second oil chamber 312.

[0103] like Fig.21 As shown, the third oil hole 331 communicates with the second oil chamber 312 and the second annular oil passage 332, and the second annular oil passage 332 is provided in an annular groove of a full circle on the inner wall of the generator chamber 33. The second annular oil passage 332 corresponds to the stator of the generator 20, so the oil flows from the second annular oil passage 332 into the stator of the generator 20 to cool the stator.

[0104] Furthermore, if Figure 22-Figure 25 As shown, the gear cavity 34 includes a drive motor input bearing mounting position 341, an intermediate bearing mounting position 342, a differential bearing mounting position 343, an engine input bearing mounting position 344 and a generator bearing mounting position 345, a speed increasing bearing 401 is mounted at the generator bearing mounting position 345, and a speed increasing gear 402 is mounted on the generator bearing mounting position 345 and the engine input bearing mounting position 344;

[0105] The speed increasing system oil circuit includes an eighth oil channel 333 and an oil pipe 7. One end of the eighth oil channel 333 is connected to the second annular oil channel 332. The eighth oil channel 333 extends from the generator chamber 33 to the gear chamber 34. The other end of the eighth oil channel 333 is located above the engine input bearing mounting position 344 and is connected to the oil pipe 7. The oil pipe 7 is provided with a plurality of oil spray holes, which spray oil onto the gear surface of the speed increasing gear 402 and the speed increasing bearing 401.

[0106] Specifically, Fig. 22 As shown, one end of the eighth oil passage 333 is in communication with the second annular oil passage 332 .

[0107] like Fig.23 As shown, the eighth oil passage 333 passes through the generator chamber 33 and then extends into the gear chamber 34 .

[0108] like Fig.24 As shown, the other end of the eighth oil passage 333 passes through the generator cavity 33 and is located above the engine input bearing mounting position 344 .

[0109] Fig.24 The middle gear cavity 34 includes a drive motor input bearing mounting position 341, an intermediate bearing mounting position 342, a differential bearing mounting position 343, an engine input bearing mounting position 344 and a generator bearing mounting position 345. A speed-increasing bearing 401 is installed at the generator bearing mounting position 345, and a speed-increasing gear 402 is installed on the generator bearing mounting position 345 and the engine input bearing mounting position 344.

[0110] like Figure 4 As shown, the speed increasing bearing 401 at the generator bearing installation position 345 is coaxially connected with the speed increasing gear 402 , and the speed increasing gear 402 at the generator bearing installation position 345 is meshed with the speed increasing gear 402 on the engine input bearing installation position 344 .

[0111] like Fig.25 As shown, the other end of the eighth oil passage 333 is connected to the oil pipe 7, and a plurality of oil spray holes (not shown) are provided on the oil pipe 7, and the oil spray holes spray oil to the gear surface of the speed-increasing gear 402 and the speed-increasing bearing 401, and the oil can cool and lubricate the speed-increasing gear 402 and the speed-increasing bearing 401. Therefore, the gears and bearings of the speed-increasing gear can be cooled by setting the speed-increasing system oil circuit.

[0112] Furthermore, if Fig.24 As shown, a drive motor oil return groove 346 is also provided on one side of the intermediate bearing mounting position 342 in the gear cavity 34. The drive motor oil return groove 346 is connected to the drive motor cavity 32. An oil baffle slope 347 is provided below the drive motor oil return groove 346. The oil baffle slope 347 extends to the bottom of the intermediate bearing mounting position 342.

[0113] Since the drive motor oil return groove 346 is connected to the drive motor cavity 32, the oil enters the gear cavity 34 from the drive motor cavity 32 through the drive motor oil return groove 346. The oil baffle slope 347 is a straight surface arranged below the drive motor oil return groove 346, extending from the side wall of the gear cavity 34 to a position close to the engine input bearing mounting position 344. The oil flows from the drive motor oil return groove 346 to the oil baffle slope 347. Since the oil baffle slope 347 is located below the intermediate bearing mounting position 342, when the intermediate shaft gear installed below the intermediate bearing mounting position 342 rotates, the oil is stirred and brought to the tooth surface of the intermediate shaft gear to cool and lubricate the intermediate shaft gear.

[0114] Furthermore, if Fig.14 and Fig.24 As shown, an oil storage chamber is provided at the bottom of the gear chamber 34, which is composed of a first arc-shaped flange 49 on the front end cover 4 and a second arc-shaped flange 348 on the gear chamber 34. The oil storage chamber is connected to the oil pump 1, and the oil pump 1 can pump the oil in the oil storage chamber into the oil cooler 2. The upper concave surface formed by the second arc-shaped flange 348 and the first arc-shaped flange 49 can store part of the gearbox oil to lubricate the tooth surface of the engine direct drive gear 504.

[0115] like Fig.14 As shown, the front end cover 4 is also provided with a first boss 490. Fig.24 As shown, a second boss 349 is provided in the gear cavity 34, and the first boss 490 and the second boss 349 are both arranged in the oil storage cavity to reduce the volume of the oil storage cavity, thereby ensuring that there is sufficient liquid level height for the oil pump 1 to absorb oil when a low amount of oil is added.

[0116] like Fig.24 As shown, the second arc-shaped flange 348 is provided with a notch 340 at one end close to the differential bearing mounting position 343. The notch 340 ensures that the oil flows into the oil storage chamber and returns to the oil pump 1 to achieve circulation.

[0117] Furthermore, if Figure 26-28 As shown, it also includes an engine input shaft lubricating oil circuit, which includes a ninth oil passage 36. The ninth oil passage 36 is directly connected to the oil pump 1. The ninth oil passage 36 leads to the engine input bearing mounting position 344 of the gear chamber 34 and is connected to the second hollow channel 505 of the engine input shaft 501.

[0118] Specifically, Fig.26 As shown, the main housing 3 is also provided with a ninth oil passage 36, which is directly connected to the oil pump 1 without passing through the oil cooler 2 and the distribution chamber 31. One end of the ninth oil passage 36 is located at the rear side of the main housing 3, as shown in FIG. Fig. 27 As shown, the other end of the ninth oil passage 36 extends to the front side of the main housing 3 and is located at the engine input bearing mounting position 344 , which corresponds to the engine input shaft 501 .

[0119] like Fig.28 As shown, the ninth oil passage 36 enters the second hollow passage 505 of the engine input shaft 501 from the engine input bearing mounting position 344 , and the oil enters the second hollow passage 505 to lubricate the bearing mounted on the engine input shaft 501 .

[0120] Since the ninth oil passage 36 does not pass through the oil cooler 2 and the distribution chamber 31, and directly enters the second hollow passage 505 from the oil pump 1, the oil is not cooled and only serves as lubrication. In addition, the ninth oil passage 36 is not controlled by the switch control valve 6, and can continuously provide oil lubrication.

[0121] Furthermore, if Fig.29 As shown, the electromagnetic clutch push ring and needle bearing 503 of the electromagnetic clutch 502 are installed on the engine input shaft 501, and the first branch oil channel 5051 and the second branch oil channel 5052 are radially provided on the second hollow channel 505. The first branch oil channel 5051 leads to the electromagnetic clutch push ring, and the second branch oil channel 5052 leads to the needle bearing 503, so that the electromagnetic clutch push ring and the needle bearing 503 can be lubricated.

[0122] The present invention controls the on-off of the generator oil circuit by switching the electromagnetic valve. When the generator is not working, the flow resistance of the oil circuit system is reduced, the working power of the oil pump is reduced, and the working efficiency of the lubrication and cooling system is improved. The present invention also cools the stator and rotor of the drive motor through the drive motor oil circuit; cools the stator of the generator through the generator oil circuit; lubricates the bearings of the reducer through the reduction system oil circuit; and lubricates the gears and bearings of the speed increaser through the speed increase system oil circuit. The present invention also lubricates the bearings and electromagnetic clutch push ring installed on the engine input shaft through the ninth oil channel.

[0123] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An oil circuit system of a drive assembly, comprising an oil pump, an oil cooler, a drive motor oil circuit, a speed reduction system oil circuit, a generator oil circuit and a speed increase system oil circuit, wherein the oil pump pumps oil into the oil cooler, and the oil cooler cools the oil, the drive assembly comprises a main housing, a front end cover and a rear end cover, the oil pump and the oil cooler are both mounted on the main housing, and characterized in that: It also includes an oil distribution chamber and a switch solenoid valve, wherein the oil distribution chamber is arranged in the main housing, the oil cooler delivers cooled oil to the oil distribution chamber, the oil distribution chamber includes a first oil chamber and a second oil chamber, the first oil chamber is connected to the oil circuit of the drive motor and the oil circuit of the speed reduction system, and the second oil chamber is connected to the oil circuit of the generator and the oil circuit of the speed increase system; The switch solenoid valve is arranged between the first oil chamber and the second oil chamber, and when the switch solenoid valve is opened, the oil flows from the first oil chamber into the second oil chamber; When the switch solenoid valve is closed, the first oil chamber and the second oil chamber are cut off.

2. The oil circuit system of the drive assembly according to claim 1, characterized in that: The main housing includes a drive motor cavity, a generator cavity and a gear cavity, wherein the drive motor cavity is used to install the drive motor, the generator cavity is used to install the generator, and the gear cavity is used to install the reducer and the speed increaser; The drive motor cavity and the generator cavity are arranged on one side of the rear end cover, the gear cavity is arranged on one side of the front end cover, the distribution oil cavity is arranged between the drive motor cavity and the generator cavity, the first oil cavity leads to the drive motor cavity, and the second oil cavity leads to the generator cavity.

3. The oil circuit system of the drive assembly according to claim 2, characterized in that: The drive motor oil circuit includes a drive motor rotor cooling branch, and the drive motor rotor cooling branch includes a first oil hole, a first oil channel and a second oil channel. The first oil hole, the first oil channel and the second oil channel are all arranged on the rear end cover. The first oil hole is connected to the first oil chamber, one end of the first oil channel is connected to the first oil hole, one end of the second oil channel is connected to the first oil channel, and the other end is connected to the first hollow channel of the rotor shaft of the drive motor.

4. The oil circuit system of the drive assembly according to claim 2, characterized in that: The drive motor oil circuit also includes a drive motor stator cooling branch, and the drive motor stator cooling branch includes a second oil hole and a first annular oil channel. The second oil hole connects the first oil cavity and the first annular oil channel. The first annular oil channel is arranged on a circle of the inner wall of the drive motor cavity.

5. The oil circuit system of the drive assembly according to claim 4, characterized in that: The front end cover includes a differential bearing slot, a drive motor bearing slot, an intermediate bearing slot and an engine input bearing slot; The reduction system oil circuit includes a third oil passage, a fourth oil passage, a fifth oil passage and a sixth oil passage, the third oil passage is arranged in the main housing, one end of the third oil passage is communicated with the annular oil passage and extends into the gear chamber, the fourth oil passage, the fifth oil passage and the sixth oil passage are all arranged in the front end cover, the other end of the third oil passage is directly communicated with the fourth oil passage and the fifth oil passage, the fourth oil passage leads to the differential bearing groove, the fifth oil passage leads to the drive motor bearing groove, one end of the sixth oil passage is communicated with the fifth oil passage, and the other end leads to the engine input bearing groove; the reduction system oil circuit also includes a seventh oil passage, the seventh oil passage connects the drive motor bearing groove and the intermediate bearing groove, and the drive motor bearing groove is located above the intermediate bearing groove.

6. The oil circuit system of the drive assembly according to claim 2, characterized in that: The generator oil circuit includes a third oil hole and a second annular oil passage, the third oil hole connects the second oil cavity and the second annular oil passage, and the second annular oil passage is arranged on a circle of the inner wall of the generator cavity.

7. The oil circuit system of the drive assembly according to claim 6, characterized in that: The gear cavity includes a drive motor input bearing mounting position, an intermediate bearing mounting position, a differential bearing mounting position, an engine input bearing mounting position and a generator bearing mounting position, a speed-increasing bearing is mounted at the generator bearing mounting position, and a speed-increasing gear is mounted on the generator bearing mounting position and the engine input bearing mounting position; The speed increasing system oil circuit includes an eighth oil channel and an oil pipe, one end of the eighth oil channel is connected to the second annular oil channel, the eighth oil channel extends from the generator chamber to the gear chamber, the other end of the eighth oil channel is located above the engine input bearing mounting position and is connected to the oil pipe, a plurality of oil spray holes are provided on the oil pipe, and the oil spray holes spray oil onto the gear surface of the speed increasing gear and the speed increasing bearing.

8. The oil circuit system of the drive assembly according to claim 7, characterized in that: It also includes an engine input shaft lubricating oil circuit, which includes a ninth oil passage, which is directly connected to the oil pump, and the ninth oil passage leads to the engine input bearing mounting position of the gear chamber and is connected to the second hollow channel of the engine input shaft.

9. The oil circuit system of the drive assembly according to claim 8, characterized in that: An electromagnetic clutch push ring and a needle bearing are installed on the engine input shaft, and a first branch oil channel and a second branch oil channel are radially provided on the second hollow channel. The first branch oil channel leads to the electromagnetic clutch push ring, and the second branch oil channel leads to the needle bearing.

10. The oil circuit system of the drive assembly according to claim 7, characterized in that: A drive motor oil return groove is also provided on one side of the intermediate bearing installation position in the gear cavity, and the drive motor oil return groove is connected to the drive motor cavity. An oil baffle slope is provided below the drive motor oil return groove, and the oil baffle slope extends to below the intermediate bearing installation position.

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