Cooling and lubricating device, driving system and vehicle

Abstract

The utility model provides a cooling and lubricating device, a driving system and a vehicle. The cooling and lubricating device comprises a box body, a shunting piece and a first shaft; a first bearing and a second bearing are arranged in the box body and support the first shaft; a first oil duct is formed in the box body, and a first oil conveying channel is formed in the first shaft; the flow dividing piece is connected with the box body, a first flow dividing opening and a second flow dividing opening which communicate with the first oil channel are formed in the flow dividing piece, the first flow dividing opening is used for supplying lubricating oil to a first bearing on the box body, and the second flow dividing opening is in butt joint with the first oil conveying channel so as to supply lubricating oil to a second bearing to lubricate the second bearing on the box body; the number of oil channels on the box body is reduced, so that the overall strength of the box body is improved, the machining difficulty of the box body is reduced, and the production yield of the box body is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle drive system lubrication, and in particular to a cooling and lubrication device, a drive system and a vehicle. Background Art

[0002] The vehicle's drive system is arranged with multiple shafts and shaft systems for transmission. To ensure the normal operation of the drive system, the moving structures and main heat-generating structures in the drive system, such as the bearings supporting each shaft, need to be cooled and lubricated. At present, active lubrication is usually performed by setting oil channels on the housing; however, if a lubrication oil channel is designed for each bearing on the housing, there will be too many oil channels on the housing, affecting the overall structural strength of the housing, making the housing processing complicated, and reducing the housing production yield. Utility Model Content

[0003] The present application provides a cooling and lubrication device, a drive system and a vehicle that are beneficial to improving the structural strength and production yield of a rear box.

[0004] In a first aspect, an embodiment of the present application provides a cooling and lubrication device, which includes a housing, a diverter and a first shaft; a first bearing and a second bearing are provided in the housing, and the first bearing and the second bearing support the first shaft; a first oil passage is provided on the housing, and a first oil delivery channel is provided in the first shaft; the diverter is connected to the housing, and a first diverter port and a second diverter port connected to the first oil passage are provided on the diverter, the first diverter port is used to supply lubricating oil to the first bearing, and the second diverter port is connected to the first oil delivery channel to supply lubricating oil to the second bearing.

[0005] According to the first aspect, in a possible implementation manner, a through hole is opened on the housing, the second bearing is disposed in the through hole, and the oil outlet of the first oil delivery channel is disposed toward a side wall of the through hole.

[0006] According to the first aspect, in a possible implementation, the first shaft includes a hollow portion and an oil hole formed on the outside of the first shaft, one end of the oil hole is connected to the hollow portion to form the first oil delivery channel, and the other end of the oil hole forms the oil outlet on the first shaft, the hollow portion forms an opening at one end of the first shaft to dock with the second diversion port, and the oil hole is arranged toward the side wall of the through hole.

[0007] According to the first aspect, in a possible implementation, an end cover is provided on one side of the housing, and a third bearing is provided on the end cover; the cooling and lubrication device also includes a second shaft transmission-connected to the first shaft, and the second shaft is rotatably supported in the housing through the second bearing and the third bearing.

[0008] According to the first aspect, in a possible implementation, a second oil delivery channel is formed in the second shaft, a second oil channel is formed in the end cover, and a first oil port and a second oil port are opened on the side of the end cover facing the inside of the casing, the first oil port and the second oil port are both connected to the second oil channel, the first oil port is used to supply lubricating oil to the third bearing, and the second oil port is connected to the second oil delivery channel to supply lubricating oil to the rotor sleeved on the second shaft.

[0009] According to the first aspect, in a possible implementation, the second bearing is disposed at one end of the through hole facing the end cover, the first shaft is inserted into the end of the second shaft, and the second shaft is inserted into the second bearing.

[0010] According to the first aspect, in a possible implementation, the first oil channel includes a first core pulling oil channel and a second core pulling oil channel, the first core pulling oil channel has a first end and a second end, the second core pulling oil channel has a third end and a fourth end, the second end of the first core pulling oil channel and the fourth end of the second core pulling oil channel are both provided with plugs, the second core pulling oil channel is connected to the first core pulling oil channel and the connection point is arranged close to the second end; the diverter is connected to the first core pulling oil channel and / or the second core pulling oil channel.

[0011] According to the first aspect, in a possible implementation, the cooling and lubrication device also includes a circulating pump, an oil cooler and a pressure filter arranged in the box body, the circulating pump, the oil cooler and the pressure filter are connected in series in sequence, and the inlet of the circulating pump is connected to the inner cavity of the box body.

[0012] According to the first aspect, in a possible implementation, an oil storage tank connected to the first oil channel is opened on the box body, the diverter cover is arranged at the notch of the oil storage tank, and the first diverter port and the second diverter port are both connected to the oil storage tank.

[0013] According to the first aspect, in a possible implementation, the diverter includes a bottom plate and a side panel, the bottom plate cover is arranged at the notch of the oil storage tank, one end of the side panel is connected to the edge of the bottom plate, and the other end of the side panel is pressed against the outer ring of the first bearing; the first diverter port and the second diverter port are opened on the bottom plate.

[0014] According to the first aspect, in a possible implementation, a first protruding structure is further provided on the bottom plate, the first protruding structure and the side panel are provided on the same side of the bottom plate, the second diversion port passes through the first protruding structure and the bottom plate, and the first protruding structure extends from the end of the first shaft into the first oil transfer channel.

[0015] According to the first aspect, in a possible implementation, a second protruding structure is protruded on the end cover, the second oil port is opened at an end of the second protruding structure, and the second protruding structure extends from the end of the second shaft into the second oil delivery channel.

[0016] In a second aspect, an embodiment of the present application further provides a drive system, which includes the cooling and lubrication device described in the first aspect.

[0017] In a third aspect, an embodiment of the present application further provides a vehicle, wherein the vehicle comprises the drive system described in the second aspect.

[0018] The cooling and lubrication device, drive system and vehicle provided by the present application are characterized in that a first diverter port and a second diverter port connected to the first oil channel are formed on the diverter member, the first diverter port is arranged toward the first bearing, and a portion of the lubricating oil in the first oil channel is diverted through the first diverter port to lubricate the first bearing; a first oil delivery channel is formed in the first shaft, and the second diverter port of the diverter member and the first oil delivery channel cooperate to achieve lubrication of the second bearing on the housing, thereby reducing the number of oil channels on the housing, thereby improving the overall strength of the housing, reducing the difficulty of processing the housing, and improving the production yield of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the cooling and lubrication device provided in the first embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of the lubrication scheme for the drive motor shaft and the drive motor rotating shaft provided in the first embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of the lubrication scheme for the generator shaft and the generator rotating shaft provided in the first embodiment of the present application.

[0023] Figure 4 yes Figure 2 A magnified schematic diagram of area A in the middle.

[0024] Figure 5 It is a schematic diagram of the diverter provided in the first embodiment of the present application.

[0025] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the middle diverter.

[0026] Figure 7 yes Figure 2 A magnified schematic diagram of area B.

[0027] Figure 8 It is a cross-sectional schematic diagram of the connection between the drive motor shaft and other structures.

[0028] Fig. 9 yes Figure 3 Enlarged schematic diagram of area C in the middle.

[0029] Fig.10 yes Figure 3 A magnified schematic diagram of region D in the middle.

[0030] Fig.11 It is a schematic structural diagram of the end cover side of the cooling and lubrication device provided in the first embodiment of the present application.

[0031] Fig.12 It is a schematic diagram of the second oil channel on the end cover provided in the first embodiment of the present application.

[0032] Fig.13 It is a schematic structural diagram of the first box side of the cooling and lubrication device provided in the first embodiment of the present application.

[0033] Fig.14 It is a schematic diagram of the lubrication circuit of the cooling and lubrication device provided in the first embodiment of the present application.

[0034] Fig.15 It is a schematic diagram of the lubrication circuit of the cooling and lubrication device provided in the first embodiment of the present application.

[0035] Reference numerals:

[0036] 100-cooling and lubricating device; 10-box; 11-rear box; 111-through hole; 12-front box; 121-first oil channel; 1211-first core pulling oil channel; 1212-second core pulling oil channel; 1213-plug; 122-oil storage tank; 13-end cover; 131-second oil channel; 1311-first branch; 1312-second branch; 1313-third branch; 132-first oil port; 133-second oil port; 134-third oil port; 135-second protruding structure; 15-accommodating cavity; 171-first bearing; 172-second bearing; 173-third bearing; 20-diverter; 21-first diverter port; 22-second diverter port; 23-bottom plate; 24-side panel; 25-first protruding structure; 301-drive motor shaft; 302-generator shaft; 31-first oil delivery channel; 311-hollow portion; 312-oil hole; 401-drive motor shaft; 402-generator shaft; 41-second oil delivery channel; 411-hollow channel; 412-oil supply hole; 51-circulating pump; 52-oil cooler; 53-pressure filter; 57-high-pressure mechanical pump; 61-first valve; 63-second valve. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] The following descriptions of the various embodiments are made with reference to the attached drawings to illustrate specific embodiments that may be implemented in the present application. Directional terms mentioned herein, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are intended to better and more clearly describe and understand the present application, rather than to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, the serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0040] The present application provides a vehicle, including a drive system. The drive system is used to provide driving force for the vehicle to move. The vehicle can be a new energy vehicle that adopts a coaxial dual-motor and engine hybrid drive, and the above-mentioned drive system is applied. Other parts of the vehicle can refer to existing new energy vehicles.

[0041] The present application provides a drive system, including a cooling and lubricating device, an engine and a transmission shaft system. The cooling and lubricating device includes a housing, a generator and a drive motor. The generator, the drive motor and the transmission shaft system are arranged in the housing, and more energy transfer paths and more speed ratios are formed through the cooperation of the engine, the generator, the drive motor and the transmission shaft system, which can better adapt to the working conditions of the whole vehicle. The housing, the generator and the drive motor in the present application cooperate with each other to form a plurality of lubricating oil circuits, which can provide the stator and rotor of the generator, the stator and rotor of the drive motor, the bearings supporting the generator shaft and the generator shaft, and the bearings supporting the drive motor shaft and the drive motor shaft to realize cooling and lubrication of the above structures. Other parts of the drive system, such as the engine, the connection structure between the engine and the dual motors and the transmission shaft system, can refer to the prior art, and this application will not elaborate on them.

[0042] See also Figure 1 and Figure 2The cooling and lubricating device 100 includes a housing 10, a flow divider 20, a first shaft, a second shaft, a circulating pump 51, an oil cooler 52 and a pressure filter 53. A first bearing 171 and a second bearing 172 are provided in the housing. The housing includes a rear housing 11 and a front housing 12 connected to each other. An end cover 13 is provided on the side of the rear housing 11 away from the front housing 12. The front housing 12, the rear housing 11 and the end cover 13 form a receiving chamber 15. A first bearing 171 is provided on the front housing 12, a second bearing 172 is provided on the rear housing 11, and a third bearing 173 is provided on the end cover 13. The first shaft and the second shaft are connected in transmission and are rotatably supported in the receiving chamber 15 through the first bearing 171, the second bearing 172 and the third bearing 173. A first oil passage 121 is provided on the front housing 12, and a second oil passage 131 is provided on the end cover 13. The inlet of the circulation pump 51 is connected with the receiving chamber 15. The circulation pump 51 is used to extract the lubricating oil in the receiving chamber 15 and transport it to the oil cooler 52 to realize the circulation of the lubricating oil. The lubricating oil is rapidly cooled when passing through the oil cooler 52 and flows to the pressure filter 53. The pressure filter 53 filters and removes impurities from the lubricating oil and provides pressure for the circulation of the lubricating oil. The pressure filter 53 transports the lubricating oil to the first oil channel 121 and the second oil channel 131. The lubricating oil flowing out of the first oil channel 121 flows to the first bearing 171 and the second bearing 172 after being diverted by the diverter 20. The end cover 13 is provided with a first oil port 132 and a second oil port 133. The lubricating oil in the second oil channel 131 flows to the third bearing 173 through the first oil port 132 and flows to the rotor on the second shaft through the second oil port 133. In this way, the main heat-generating and moving parts in the drive system are cooled and lubricated.

[0043] Among them, the driving system has a clear installation direction during use. The lubricating oil after cooling and lubricating the main heat-generating components and moving components is collected at the bottom of the receiving chamber 15. The inlet of the circulating pump 51 can be set at the bottom of the receiving chamber 15, which is convenient for extracting the collected lubricating oil and putting it into the cooling and lubrication cycle again.

[0044] The first shaft may be a drive motor shaft 301, and correspondingly, the second shaft is a drive motor shaft 401. The drive motor shaft 301 and the drive motor shaft 401 are coaxially arranged and transmission-connected. The drive motor shaft 401 is sleeved with a drive motor rotor, and the rear housing 11 is provided with a drive motor stator, which is sleeved on the periphery of the drive motor rotor. Figure 2 As shown. The first shaft may also be the generator shaft 302, and correspondingly, the second shaft is the generator shaft 402, and the generator shaft 302 and the generator shaft 402 are coaxially arranged and transmission-connected. The generator shaft 402 is sleeved with a generator rotor, and the rear housing 11 is provided with a generator stator, and the generator stator is sleeved on the periphery of the generator rotor, as shown. Figure 3 shown.

[0045] The specific cooling and lubrication scheme for the shaft system where the drive motor shaft 301 and the drive motor rotating shaft 401 are located is as follows.

[0046] See also Figure 2 and Figure 4 A through hole 111 is provided on the rear box body 11, and two second bearings 172 are arranged in the through hole 111 along the axial direction of the through hole 111; a first end of the drive motor shaft 301 is penetrated through the first bearing 171, and the other end is penetrated through one of the second bearings 172, one end of the drive motor shaft 401 is penetrated through the other second bearing 172, and the other end is penetrated through the third bearing 173, and the end of the drive motor shaft 301 penetrated through the second bearing 172 and the end of the drive motor shaft 401 penetrated through the third bearing 173 are transmission-connected, thereby supporting the drive motor shaft 301 through the first bearing 171 and the second bearing 172, and supporting the drive motor shaft 401 through the second bearing 172 and the third bearing 173.

[0047] See also Figure 4 The flow divider 20 forms a first flow divider port 21 and a second flow divider port 22 connected to the first oil passage 121. The first flow divider port 21 is arranged toward the first bearing 171. A portion of the lubricating oil in the first oil passage 121 is diverted through the first flow divider port 21 to lubricate the first bearing 171. A first oil delivery channel 31 is formed in the drive motor shaft 301. The inlet of the first oil delivery channel 31 is connected to the second flow divider port 22. The outlet of the first oil delivery channel 31 is arranged toward the inner wall of the through hole 111. A portion of the lubricating oil in the first oil passage 121 is diverted through the second flow divider port 22 and flows through the first oil delivery channel 31. After that, it is collected in the through hole 111 and flows along the inner wall of the through hole 111 to the second bearing 172. The outlet of the first oil delivery channel 31 is located between the two second bearings 172. The lubricating oil can flow along the inner wall of the through hole 111 to lubricate the two second bearings 172 at the same time. In this embodiment, a first oil delivery channel 31 is formed on the driving motor shaft 401, and the second diversion port 22 of the diversion member 20 and the first oil delivery channel 31 cooperate to achieve lubrication of the second bearing 172 on the rear housing 11, thereby reducing the number of oil channels on the rear housing 11, thereby improving the overall strength of the rear housing 11, reducing the difficulty of processing the rear housing 11, and improving the production yield of the rear housing 11.

[0048] In some embodiments, an oil storage tank 122 connected to the first oil channel 121 is provided on the front box body 12, and the diverter 20 cover is provided at the notch of the oil storage tank 122, and the first diverter port 21 and the second diverter port 22 are both connected to the oil storage tank 122. The oil storage tank 122 can play a buffering effect, and the first oil channel 121 guides the lubricating oil to the oil storage tank 122, and the lubricating oil accumulates in the oil storage tank 122, and the oil output is distributed according to the aperture of the first diverter port 21 and the second diverter port 22. That is, the aperture of the first diverter port 21 and the second diverter port 22 is determined according to the flow rate of the lubricating oil required for cooling and lubricating the first bearing 171 and the second bearing 172, so as to realize the reasonable distribution of the lubricating oil without setting up a separate adjustment structure.

[0049] In the above embodiment, the aperture of the first diversion port 21 can be 2 mm, and the aperture of the second diversion port 22 can be 3 mm. In other embodiments, the apertures of the first diversion port 21 and the second diversion port 22 can be larger or smaller, which is not limited in the present application.

[0050] It can be understood that the aperture of the first diverter port 21 is limited by the size of the first bearing 171, and the aperture of the second diverter port 22 is limited by the size of the drive motor shaft 401. The apertures of the first diverter port 21 and the second diverter port 22 should not be greater than 5 mm. Since the front box body 12 is usually made of a die-cast aluminum shell, it is easy to break the knife when processing small-sized holes, which reduces the product yield. In this embodiment, a diverter 20 is provided, and the first diverter port 21 or the second diverter port 22 is formed by machining on the diverter 20, thereby reducing the processing difficulty and improving the product yield.

[0051] See also Figures 4 to 6 The flow divider 20 includes a bottom plate 23 and a side panel 24. The bottom plate 23 is covered at the notch of the oil storage tank 122. One end of the side panel 24 is connected to the edge of the bottom plate 23, and the other end of the side panel 24 is pressed against the outer ring of the first bearing 171. The first flow divider 21 and the second flow divider 22 are provided on the bottom plate 23. The second flow divider 22 only serves to connect with the first oil delivery channel 31. The first flow divider 21 is arranged toward the first bearing 171. Since the aperture of the first flow divider 21 is small, the lubricating oil forms a spraying effect when flowing out of the first flow divider 21, which is beneficial to improve the lubrication efficiency. The side panel 24 is pressed against the outer ring of the first bearing 171, reducing the amount of lubricating oil overflowing from the gap between the side panel 24 and the first bearing 171. Most of the lubricating oil flows from the gap between the inner ring and the outer ring of the first bearing 171 to the receiving chamber 15, so that the lubricating oil is fully in contact with the first bearing 171, thereby improving the cooling effect and the lubricating effect.

[0052] The number of the first diversion openings 21 can be multiple, and the multiple first diversion openings 21 are arranged at intervals in the circumferential direction with the second diversion opening 22 as the axis. That is, the first bearing 171 has multiple cooling and lubrication points along the circumference, which can further improve the lubrication efficiency and cooling effect. The number of the first diversion openings 21 can be 2, 3 or even more, and the present application does not limit the number of the first diversion openings 21.

[0053] A first protruding structure 25 is also provided on the bottom plate 23. The first protruding structure 25 and the side panel 24 are provided on the same side of the bottom plate 23. The second diversion port 22 passes through the first protruding structure 25 and the bottom plate 23. The first protruding structure 25 extends from the end of the driving motor shaft 301 into the first oil delivery channel 31 to directly provide lubricating oil to the first oil delivery channel 31, thereby reducing the risk of the lubricating oil in the first oil delivery channel 31 flowing back and overflowing to the diversion member 20, thereby ensuring the oil supply to the first oil delivery channel 31 and the second bearing 172.

[0054] The drive motor shaft 301 includes a hollow portion 311 and an oil hole 312 formed on the outside of the drive motor shaft 301. The oil hole 312 is connected to the hollow portion 311 to form a first oil delivery channel 31. The hollow portion 311 forms an opening at one end of the drive motor shaft 301 to dock with the second diversion port 22, and the oil hole is arranged toward the side wall of the through hole 111. The first protrusion structure 25 is inserted into the hollow portion 311 from the opening. When the drive motor shaft 301 rotates, the lubricating oil in the hollow portion 311 is thrown out from the oil hole 312 into the through hole 111. The lubricating oil flows in the through hole 111 to lubricate the two second bearings 172. The lubricating oil is thrown out from the oil hole 312 to form a negative pressure in the hollow portion 311, which is adapted to the first protrusion structure 25 to transport the lubricating oil to the hollow portion 311, so as to prevent the lubricating oil from flowing back and overflowing from the opening at the end of the drive motor shaft 301.

[0055] The number of the oil holes 312 can be multiple, and the multiple oil holes 312 are arranged at intervals along the circumference of the drive motor shaft 301. Without affecting the supporting strength of the drive motor shaft 301, the number of the oil holes 312 can be 3, 4 or even more.

[0056] Similar to the first protruding structure 25, see Figure 7 and Figure 8 A second protruding structure 135 is protruded on the end cover 13, and the second oil port 133 is opened at the end of the second protruding structure 135. The second protruding structure 135 extends from the end of the driving motor shaft 401 into the second oil delivery channel 41 to directly provide lubricating oil to the second oil delivery channel 41, thereby reducing the risk of backflow and overflow of the lubricating oil in the second oil delivery channel 41 and ensuring the oil supply to the second oil delivery channel 41 and the rotor.

[0057] The drive motor shaft 401 includes a hollow channel 411 and an oil supply hole 412 formed on the outside of the drive motor shaft 401. The oil supply hole 412 is connected to the hollow channel 411 to form a second oil delivery channel 41. The hollow channel 411 forms an opening at one end of the drive motor shaft 401 to dock with the second oil port 133, and the oil supply hole 412 is set toward the rotor. The second protrusion structure 135 is inserted into the hollow channel 411 from the opening. When the drive motor shaft 401 rotates, the lubricating oil in the hollow channel 411 is thrown out from the oil supply hole 412 to the rotor for cooling and lubrication. The lubricating oil is thrown out from the oil supply hole 412, thereby forming a negative pressure in the hollow channel 411 to prevent the lubricating oil from flowing back and overflowing from the opening at the end of the drive motor shaft 401.

[0058] The number of oil supply holes 412 can be 4, and multiple oil supply holes 412 are arranged at circumferential intervals along the drive motor shaft 401. Without affecting the supporting strength of the drive motor shaft 401, the number of oil supply holes 412 can be 3, 5, 6 or even more. This application does not limit the number of oil supply holes 412.

[0059] The aperture of the first oil port 132 can be 5 mm, and the aperture of the second oil port 133 can be 2 mm. The apertures of the first oil port 132 and the second oil port 133 are determined according to the flow rate of lubricating oil required by the third bearing 173 and the rotor to achieve reasonable distribution of the lubricating oil. This application does not limit the apertures of the first oil port 132 and the second oil port 133.

[0060] See also Figure 3 , Fig. 9 and Fig.10 The specific cooling and lubrication scheme for the shaft system where the generator shaft 302 and the generator shaft 402 are located is roughly the same as the specific cooling and lubrication scheme for the shaft system where the drive motor shaft 301 and the drive motor shaft 401 are located, with the difference that the number of the second bearing 172 is one, and the second bearing 172 is arranged on the side of the through hole 111 facing the end cover 13, one end of the generator shaft 302 is penetrated by the first bearing 171, and the other end is inserted into the generator shaft 402 and is transmission-connected with the generator shaft 402, one end of the generator shaft 402 connected to the generator shaft 302 is penetrated by the second bearing 172, and the other end is penetrated by the third bearing 173, and the first protrusion structure 25 on the diverter 20 extends into the first oil delivery channel 31 of the generator shaft 402, and as the generator shaft 402 rotates, the lubricating oil in the first oil delivery channel 31 is thrown out to the inner wall of the through hole 111, and flows along the inner wall of the through hole 111 to achieve lubrication of the second bearing 172.

[0061] The oil hole 312 on the generator shaft 402 can be set at an angle. Since there is only one second bearing 172, the angle of the oil hole can be set to face the second bearing 172, thereby achieving spray cooling and lubrication of the second bearing 172, thereby improving the cooling effect and lubrication efficiency.

[0062] The above description is only an example. The present application does not limit the assembly relationship between the first shaft, the second shaft and the second bearing 172. It is only necessary to install the second bearing 172 in the through hole 111 to form an oil collecting structure similar to a closed end, and the oil outlet of the first oil delivery channel 31 on the first shaft faces the side wall of the through hole 111 so that the lubricating oil flows into the oil collecting structure to achieve lubrication of the second bearing 172.

[0063] For a hybrid drive system with dual motors, the shaft group where the drive motor shaft 301 and the drive motor rotating shaft 401 are located is arranged side by side with the shaft group where the generator shaft 302 and the generator rotating shaft 402 are located. The drive motor shaft 301 and the drive motor rotating shaft 401 are each provided with a corresponding flow divider 20, and the first oil passage 121 is connected to the two flow dividers 20 in sequence. The first oil passage 121 simultaneously provides lubricating oil to the first bearing 171 and the second bearing 172 corresponding to the drive motor shaft 301 and the first bearing 171 and the second bearing 172 corresponding to the generator shaft 302. The second oil circuit is divided into three branches, namely the first branch 1311, the second branch 1312 and the third branch 1313, as shown in FIG. Fig.11 and Fig.12 As shown, the first oil port 132 corresponding to the generator shaft 402 is connected to the first branch 1311, the first oil port 132 corresponding to the drive motor shaft 401 is connected to the second branch 1312, and the second oil port 133 corresponding to the generator shaft 402 and the second oil port 133 corresponding to the drive motor shaft 401 are connected to the third branch 1313, that is, the pressure filter 53 provides lubricating oil to the third bearing 173 corresponding to the generator shaft 402, the third bearing 173 corresponding to the drive motor shaft 401, and the rotor (including the generator rotor and the drive motor rotor) through different branches, so that the branches can be controlled separately according to different working conditions. That is, the cooling and lubrication device 100 includes two or more first shafts, and the number of second shafts and first shafts is known and they are connected in a one-to-one transmission manner.

[0064] The first branch 1311, the second branch 1312 and the third branch 1313 are not connected to each other on the end cover, that is, the first branch 1311, the second branch 1312 and the third branch 1313 respectively have an oil inlet, and the lubricating oil is divided into three branches to supply the lubricating oil to different positions.

[0065] See also Fig.13The first oil passage 121 includes a first core pulling oil passage 1211 and a second core pulling oil passage 1212. The first core pulling oil passage 1211 has a first end and a second end, and the second core pulling oil passage 1212 has a third end and a fourth end. The second end of the first core pulling oil passage 1211 and the fourth end of the second core pulling oil passage 1212 are both provided with a plug 1213. The second core pulling oil passage 1212 is connected to the first core pulling oil passage 1211 and the connection point is arranged near the second end; the diverter 20 is connected to the first core pulling oil passage 1211 and / or the second core pulling oil passage 1212. The first core pulling oil channel 1211 and the second core pulling oil channel 1212 are both formed by core pulling, and the plug 1213 is arranged at the opening formed by core pulling of the first core pulling oil channel 1211 and the second core pulling oil channel 1212. In this embodiment, the two plugs 1213 are staggered to stagger the core pulling directions of the first core pulling oil channel 1211 and the second core pulling oil channel 1212, thereby avoiding interference between the first core pulling oil channel 1211 and the second core pulling oil channel 1212 when the core is pulled at the same time. Compared with the oil channels formed by machining, this embodiment simultaneously realizes the core pulling of the first core pulling oil channel 1211 and the second core pulling oil channel 1212, thereby improving the processing efficiency and the airtightness qualification rate.

[0066] The plug 1213 can be a core-pulling rivet composed of a rivet core and a cap body, or a threaded plug. The present application does not limit the specific structure of the plug 1213, as long as the plug 1213 can seal the second end of the first core-pulling oil passage 1211 and the fourth end of the second core-pulling oil passage 1212.

[0067] See also Fig.14 The cooling and lubricating device 100 may also be provided with a first valve 61, which is used to control the on-off of the third branch 1313. Specifically, at low speed, the first valve 61 is closed, and no lubricating oil is provided to the third branch 1313, that is, no lubricating oil is provided to the second oil port 133, thereby reducing the oil throwing loss of the drive motor rotor at low speed.

[0068] When the generator stator needs cooling and lubrication, a third oil port 134 connected to the first branch 1311 can be opened on the end cover 13. The third oil port 134 is used to provide lubricating oil to the generator stator arranged outside the rotor.

[0069] See also Fig.15The cooling and lubricating device 100 further includes a high-pressure mechanical pump 57 and a second valve 63 which are arranged in linkage. The inlet of the high-pressure mechanical pump 57 is connected to the receiving chamber 15. The high-pressure mechanical pump 57 and the circulating pump 51 are connected in parallel to the inlet end of the oil cooler 52. The high-pressure mechanical pump 57 is connected in transmission to the generator shaft 402. This embodiment adopts a combination of the circulating pump 51 and the high-pressure mechanical pump 57 as a source of lubricating oil. In the series mode of the generator and the drive motor, the high-pressure mechanical pump 57 is connected in transmission to the generator shaft 402. When the generator shaft 402 moves, the high-pressure mechanical pump 57 starts to run. At this time, the circulating pump 51 and the high-pressure mechanical pump 57 jointly provide lubricating oil to the oil cooler 52. Since the high-pressure mechanical pump 57 and the second valve 63 are linked, that is, when the high-pressure mechanical pump 57 is turned on, the second valve 63 conducts the first branch 1311, thereby providing lubricating oil to the generator stator and the third bearing 173 corresponding to the generator shaft 402. In this embodiment, the high-pressure mechanical pump 57 and the second valve 63 are automatically opened with the movement of the generator shaft 402, and automatically closed with the stop of the generator shaft 402. Only when the generator is working will the first branch 1311 be opened to lubricate the generator stator and the third bearing 173 corresponding to the generator shaft 402, thereby realizing automatic control of the on and off of the first branch 1311 and improving the efficiency of the entire cooling and lubrication device 100.

[0070] The present application adopts a combination of a circulating pump 51 and a high-pressure mechanical pump 57 as a source of lubricating oil. An oil passage is designed on the housing 10, and a first oil delivery passage 31 is opened inside the drive motor shaft 301 and the generator shaft 302 to guide oil, thereby solving the lubrication problem of the second bearing 172 on the rear housing 11. The lubrication ideas according to different driving conditions of the vehicle are as follows:

[0071] In EV mode (pure electric mode), the circulating pump 51 provides lubricating oil, which flows through the oil cooler 52 and the pressure filter 53 in sequence and is divided into three oil passages. The first oil passage: enters the third branch 1313 on the end cover 13 through the first valve 61, enters the second oil delivery channel 41 through the second oil port 133 to provide lubricating oil to the rotor of the generator and the rotor of the drive motor; the second oil passage: enters the first oil passage 121 on the front box 12, and provides lubricating oil to the first bearing 171 through the first diverter port 21 of the diverter 20; enters the first oil delivery channel 31 through the second diverter port 22 of the diverter 20 to provide lubricating oil to the second bearing 172; the third oil passage: enters the second branch 1312 on the end cover 13, and provides lubricating oil to the third bearing 173 corresponding to the drive motor shaft 401 and the stator of the drive motor through the first oil port 132 corresponding to the drive motor shaft 401. A first valve 61 is provided on the pipeline connecting the pressure filter 53 and the third branch 1313. The first valve 61 is closed under low speed conditions to reduce the oil throwing loss of the rotor of the driving motor.

[0072] In the generator and drive motor series mode, the dual pumps (circulation pump 51 plus high-pressure mechanical pump 57) jointly provide lubricating fluid, wherein when the high-pressure mechanical pump 57 is started, the pressure oil opens the second valve 63 and conducts the first branch 1311. The circulation pump 51 and the high-pressure mechanical pump 57 provide lubricating oil, which is divided into four oil passages after passing through the oil cooler 52 and the pressure filter 53. The first three oil passages are the same as those in the EV mode, and the fourth oil passage: enters the first branch 1311 on the end cover 13 through the second valve 63, and provides lubricating oil to the third bearing 173 corresponding to the generator shaft 402 through the first oil port 132 corresponding to the generator shaft 402, and provides lubricating oil to the stator of the generator through the third oil port 134.

[0073] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A cooling and lubrication device, characterized in that: The cooling and lubricating device comprises a housing, a flow divider and a first shaft; a first bearing and a second bearing are arranged in the housing, and the first bearing and the second bearing support the first shaft; The housing is provided with a first oil passage, and the first shaft is provided with a first oil delivery passage; the flow divider is connected to the housing, and the flow divider is provided with a first flow diversion port and a second flow diversion port connected to the first oil passage, the first flow diversion port is used to supply lubricating oil to the first bearing, and the second flow diversion port is connected to the first oil delivery passage to supply lubricating oil to the second bearing.

2. The cooling and lubricating device according to claim 1, characterized in that: A through hole is formed on the box body, the second bearing is arranged in the through hole, and the oil outlet of the first oil delivery channel is arranged toward the side wall of the through hole.

3. The cooling and lubricating device according to claim 2, characterized in that: The first shaft includes a hollow portion and an oil hole formed on the outer side of the first shaft, one end of the oil hole is connected to the hollow portion to form the first oil delivery channel, the other end of the oil hole forms the oil outlet on the first shaft, the hollow portion forms an opening at one end of the first shaft to dock with the second diversion port, and the oil hole is arranged toward the side wall of the through hole.

4. The cooling and lubricating device according to claim 2, characterized in that: An end cover is provided on one side of the box body, a third bearing is provided on the end cover, and the end cover is connected to one side of the box body; the cooling and lubrication device also includes a second shaft drivingly connected to the first shaft, and the second shaft is rotatably supported in the box body through the second bearing and the third bearing.

5. The cooling and lubricating device according to claim 4, characterized in that: A second oil delivery channel is formed in the second shaft, and a second oil channel is formed in the end cover. A first oil port and a second oil port are formed on a side of the end cover facing the inside of the casing. Both the first oil port and the second oil port are connected to the second oil channel. The first oil port is used to supply lubricating oil to the third bearing, and the second oil port is connected to the second oil delivery channel to supply lubricating oil to the rotor sleeved on the second shaft.

6. The cooling and lubricating device according to claim 4, characterized in that: The second bearing is arranged at one end of the through hole facing the end cover, the first shaft is inserted into the end of the second shaft, and the second shaft is inserted into the second bearing.

7. The cooling and lubricating device according to claim 4, characterized in that: The first oil passage includes a first core pulling oil passage and a second core pulling oil passage, the first core pulling oil passage has a first end and a second end, the second core pulling oil passage has a third end and a fourth end, the second end of the first core pulling oil passage and the fourth end of the second core pulling oil passage are both provided with plugs, the second core pulling oil passage is connected to the first core pulling oil passage and the connection point is arranged close to the second end; the diverter is connected to the first core pulling oil passage and / or the second core pulling oil passage.

8. The cooling and lubricating device according to claim 1, characterized in that: The cooling and lubricating device also includes a circulation pump, an oil cooler and a pressure filter arranged in the box body. The circulation pump, the oil cooler and the pressure filter are connected in series in sequence, and the inlet of the circulation pump is connected to the inner cavity of the box body.

9. The cooling and lubricating device according to claim 1, characterized in that: An oil storage tank connected to the first oil channel is provided on the box body, the flow divider cover is arranged at the notch of the oil storage tank, and the first flow divider port and the second flow divider port are both connected to the oil storage tank.

10. The cooling and lubricating device according to claim 9, characterized in that: The diverter member includes a bottom plate and a side panel, the bottom plate cover is arranged at the notch of the oil storage tank, one end of the side panel is connected to the edge of the bottom plate, and the other end of the side panel is pressed against the outer ring of the first bearing; the first diverter port and the second diverter port are opened on the bottom plate.

11. The cooling and lubricating device according to claim 10, characterized in that: The bottom plate is also provided with a first protruding structure, the first protruding structure and the side panel are arranged on the same side of the bottom plate, the second diversion port passes through the first protruding structure and the bottom plate, and the first protruding structure extends from the end of the first shaft into the first oil delivery channel.

12. The cooling and lubricating device according to claim 5, characterized in that: A second protruding structure is protruded on the end cover, the second oil port is opened at the end of the second protruding structure, and the second protruding structure extends from the end of the second shaft into the second oil delivery channel.

13. A drive system, characterized in that: The drive system comprises a cooling and lubrication device according to any one of claims 1 to 12.

14. A vehicle, characterized in that: The vehicle includes a drive system according to claim 13.

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