Distributed dual-motor cooling system

Abstract

The invention belongs to the technical field of motor cooling, and discloses a distributed dual-motor cooling system which comprises a left speed reducer assembly, a dual-motor assembly, a right speed reducer assembly and an electric control assembly, the left speed reducer assembly and the right speed reducer assembly are located on the two sides of the dual-motor assembly, and the electric control assembly is located on the front side of the dual-motor assembly; a left oil inlet channel is formed in the bottom of the left speed reducer assembly and connected with an inlet of a first oil pump, an outlet of the first oil pump is connected with a first oil way of the first heat exchanger, and a left oil way, an oil injection way, a left motor cooling oil way, an oil outlet channel, a right oil way and a right motor cooling oil way are arranged in the shell. A right oil inlet channel is formed in the bottom of the right speed reducer assembly and connected with an inlet of a second oil pump, and an outlet of the second oil pump is connected with a second oil way of the second heat exchanger. When the heating amount of the assembly is small, only the first oil pump or the second oil pump can be started to cool the double motors and the speed reducer, and the energy consumption of the whole vehicle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor cooling, and in particular to a distributed dual-motor cooling system. Background Art

[0002] The existing dual-motor cooling system mostly adopts a solution of cooling the left and right motors separately. The two cooling oil channels are not connected to each other. When the motor is working, the left and right cooling pumps work at the same time to supply cooling oil to the left and right motors and reducers respectively. The two sides are not connected to each other or only the oil pan is connected. The existing solution is that the cooling oil in the left and right heat exchangers flows to the left and right motor housings respectively. Oil holes are drilled between the heat exchanger and the housing. The heat exchanger is directly fixed on the housing. After the oil is cooled by the heat exchanger, it flows from the motor side housing to the motor surface, and then flows to the motor winding for cooling. The two cooling circuits are unrelated to each other. However, since the two cooling circuits are independent, the two oil pumps must start working at the same time to cool the motors on both sides, which consumes a lot of energy. When one side of the oil pump is aged or damaged, the cooling of the motors on both sides is uneven, affecting the normal life and power. Summary of the invention

[0003] The object of the present invention is to provide a distributed dual-motor cooling system to solve the problems raised in the above background technology.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A distributed dual-motor cooling system comprises a left reducer assembly, a dual-motor assembly, a right reducer assembly and an electric control assembly, wherein the left reducer assembly and the right reducer assembly are located on both sides of the dual-motor assembly, and the electric control assembly is located on the front side of the dual-motor assembly;

[0006] The left reducer assembly comprises a left reducer end cover and a left reducer gear set;

[0007] The dual motor assembly comprises a housing, a motor cover, a first motor and a second motor, wherein the motor cover is disposed on the top of the housing, the first motor and the second motor are disposed inside the housing, the left reducer end cover is disposed on the left side of the housing, the left reducer gear set is disposed inside the left reducer end cover, and the output end of the first motor is connected to the input end of the left reducer gear set;

[0008] The right reducer assembly comprises a right reducer end cover and a right reducer gear set, wherein the right reducer end cover is arranged on the right side of the housing, the right reducer gear set is arranged inside the right reducer end cover, and the output end of the second motor is connected to the input end of the right reducer gear set;

[0009] The electric control assembly comprises an electric control cover plate and a power module, wherein the electric control cover plate is arranged at the front side of the housing, and the power module is arranged inside the electric control cover plate;

[0010] A first heat exchanger is disposed on the top of the left reducer assembly, a first oil pump is disposed on the bottom of the left reducer assembly, a second heat exchanger is disposed on the top of the right reducer assembly, and a second oil pump is disposed on the bottom of the right reducer assembly;

[0011] A left oil inlet passage is provided at the bottom of the left reducer assembly, the left oil inlet passage is connected to the inlet of the first oil pump, the outlet of the first oil pump is connected to the first oil circuit of the first heat exchanger, a left oil circuit, an oil injection circuit, a left motor cooling oil circuit and an oil outlet passage are provided in the shell, the left oil circuit is connected to the first oil circuit of the first heat exchanger, the left oil circuit is connected to the oil injection circuit, the left motor cooling oil circuit is connected to the oil injection circuit, the left motor cooling oil circuit is used to provide cooling oil for cooling the first motor, the oil outlet passage is communicated with the oil injection circuit, and the oil outlet passage is used to transport cooling oil to the left reducer assembly and the right reducer assembly;

[0012] A right oil inlet passage is provided at the bottom of the right reducer assembly, the right oil inlet passage is connected to the inlet of the second oil pump, the outlet of the second oil pump is connected to the second oil circuit of the second heat exchanger, a right oil circuit and a right motor cooling oil circuit are also provided in the housing, the right oil circuit is connected to the second oil circuit of the second heat exchanger, the right oil circuit is connected to the oil injection circuit, the right motor cooling oil circuit is connected to the oil injection circuit, and the right motor cooling oil circuit is used to provide cooling oil for cooling the second motor;

[0013] A water inlet is provided at the bottom of the electric control component, a cooling plate is provided in the electric control component, the cooling plate forms a cooling area in the electric control component, the power module is located in the cooling area, the water inlet channel of the cooling plate is connected to the water inlet, the first water outlet channel of the cooling plate is connected to the first water path of the first heat exchanger, the second water outlet channel of the cooling plate is connected to the second water path of the second heat exchanger, the first oil path of the first heat exchanger exchanges heat with the first water path of the first heat exchanger, and the second oil path of the second heat exchanger exchanges heat with the second water path of the second heat exchanger.

[0014] Optionally, the left-side oil inlet channel includes a left-side first oil inlet channel and a left-side second oil inlet channel, the left-side first oil inlet channel is connected to the left-side second oil inlet channel, the left-side first oil inlet channel is communicated with the interior of the left reducer assembly, and the left-side second oil inlet channel is connected to the inlet of the first oil pump.

[0015] Optionally, the right-side oil inlet channel includes a right-side first oil inlet channel and a right-side second oil inlet channel, the right-side first oil inlet channel is connected to the right-side second oil inlet channel, the right-side first oil inlet channel is communicated with the interior of the right reducer assembly, and the right-side second oil inlet channel is connected to the inlet of the second oil pump.

[0016] Optionally, the left motor cooling oil circuit is provided with a plurality of first oil spray holes, and the right motor cooling oil circuit is provided with a plurality of second oil spray holes.

[0017] Optionally, the oil filling circuit is connected to a bearing lubricating oil channel, a bearing hole is provided in the housing, the bearing lubricating oil channel is connected to the bearing hole, the motor bearing is installed in the bearing hole, and the bearing lubricating oil channel is used to provide cooling oil to the motor bearing for lubrication.

[0018] Optionally, the left reducer end cover is provided with a left first oil outlet passage and a left second oil outlet passage, and the left first oil outlet passage and the left second oil outlet passage are connected to the oil outlet passage, and the left first oil outlet passage and the left second oil outlet passage are used to provide cooling oil for the left reducer gear set.

[0019] Optionally, the right reducer end cover is provided with a first oil outlet passage on the right side and a second oil outlet passage on the right side, and the first oil outlet passage on the right side and the second oil outlet passage on the right side and the oil outlet channel, and the first oil outlet passage on the right side and the second oil outlet passage on the right side are used to provide cooling oil for the right reducer gear set.

[0020] Optionally, the left oil circuit is provided with a first one-way valve;

[0021] The right oil circuit is provided with a second one-way valve.

[0022] Optionally, the first water outlet channel of the cooling plate is connected to a first left water channel, the first left water channel is connected to a second left water channel, and the second left water channel is connected to the first water channel of the first heat exchanger;

[0023] The second water outlet channel of the cooling plate is connected to the first right water channel, the first right water channel is connected to the second right water channel, and the second right water channel is connected to the second water channel of the second heat exchanger.

[0024] Optionally, the first water circuit of the first heat exchanger is connected to a first water outlet pipe;

[0025] The second water channel of the second heat exchanger is connected to a second water outlet pipe.

[0026] Beneficial effects of the present invention:

[0027] The distributed dual-motor cooling system provided by the present invention, when in use, cooling water enters into the cooling plate from the water inlet, the cooling range of the cooling plate is the cooling area, the power module is cooled and dissipated, and after the cooling water passes through the cooling plate to take away the heat, it enters the first heat exchanger and the second heat exchanger to exchange heat and cool with the cooling oil. The overall cooling structure is very simple, without complex piping design, and water enters from the bottom and exits from the top, ensuring uniform heat dissipation of the power module, reducing the failure rate of the electronic control and increasing its service life; when the first oil pump is turned on, the cooling oil is pumped out from the bottom of the left reducer assembly, enters the first oil pump through the left oil inlet channel, and then the cooling oil enters the first heat exchanger. After heat exchange with the cooling water, the cooling oil flows out from the first heat exchanger, enters the oil filling circuit through the left oil circuit, and then passes through the left motor cooling oil circuit and the right The motor cooling oil circuit provides cooling oil to the first motor and the second motor for cooling, and the cooling oil in the oil filling circuit flows through the oil outlet channel to the left reducer assembly and the right reducer assembly to provide lubrication and cooling for the left reducer gear set and the right reducer gear set; when the second oil pump is turned on, the cooling oil is drawn out from the bottom of the right reducer assembly, enters the second oil pump through the right oil inlet channel, and then enters the second heat exchanger. After heat exchange with the cooling water, the cooling oil flows out of the second heat exchanger, enters the oil filling circuit through the right oil circuit, and then provides cooling oil to the first motor and the second motor through the left motor cooling oil circuit and the right motor cooling oil circuit for cooling, and the cooling oil in the oil filling circuit flows through the oil outlet channel to the left reducer assembly and the right reducer assembly to provide lubrication and cooling for the left reducer gear set and the right reducer gear set. The distributed dual-motor cooling system provided by the present invention can enable only the first oil pump or the second oil pump to provide cooling for the dual motors and the reducer when the heat generated by the assembly is relatively low, thereby reducing the energy consumption of the entire vehicle; when the heat generated by the assembly is relatively high, the first oil pump and the second oil pump can be enabled at the same time to provide cooling for the dual motors and the reducer, thereby ensuring the normal driving of the entire vehicle under extreme working conditions; when the first oil pump or the second oil pump is damaged, the other undamaged oil pump can be started to provide cooling for the dual motors and the reducer, thereby ensuring that the entire vehicle can still drive normally under a local fault environment; the first oil pump and the second oil pump can be used intermittently and alternately to increase the service life of the oil pump; when on an inclined road, the oil pump on the lower side can be enabled according to the different inclination angles of the entire vehicle, thereby preventing the occurrence of vacuum and reducing the amount of refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 It is a structural schematic diagram of the distributed dual-motor cooling system provided by the present invention;

[0030] Figure 2 is a top view of the distributed dual-motor cooling system provided by the present invention;

[0031] Figure 3 is a front view of the distributed dual-motor cooling system provided by the present invention;

[0032] Figure 4 yes Figure 3 Cross-sectional view of the middle BB;

[0033] Figure 5 is a bottom view of the distributed dual-motor cooling system provided by the present invention;

[0034] Figure 6 yes Figure 2 Sectional view of AA in the middle;

[0035] Figure 7 It is a left view of the distributed dual-motor cooling system provided by the present invention.

[0036] In the figure:

[0037] 10. Left reducer assembly; 11. Left reducer end cover; 12. First heat exchanger; 13. First water outlet pipe; 14. First oil pump; 15. First one-way valve; 20. Dual motor assembly; 21. Housing; 22. Motor cover; 23. First motor; 24. Second motor; 30. Right reducer assembly; 31. Right reducer end cover; 32. Second heat exchanger; 33. Second water outlet pipe; 34. Second oil pump; 35. Second one-way valve; 40. Electric control assembly; 41. Electric control cover; 42. Water inlet; 43. Cooling plate; 501. Cooling area; 502. First left water channel; 503. Second left water channel; 504. First water outlet channel; 505. The second water outlet channel; 506, the first right water channel; 507, the second right water channel; 601, the first oil inlet channel on the left; 602, the second oil inlet channel on the left; 603, the second oil inlet channel on the right; 604, the first oil inlet channel on the right; 605, the first lifting oil circuit; 606, the left oil circuit; 607, the left motor cooling oil circuit; 608, the first oil outlet channel on the left; 609, the second oil outlet channel on the left; 610, the oil outlet channel; 611, the oil filling circuit; 612, the second oil outlet channel on the right; 613, the first oil outlet channel on the right; 614, the right motor cooling oil circuit; 615, the right oil circuit; 616, the second lifting oil circuit; 617, the bearing lubrication oil channel. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0043] like Figures 1 to 7As shown, the present invention provides a distributed dual-motor cooling system, including a left reducer assembly 10, a dual-motor assembly 20, a right reducer assembly 30 and an electronic control assembly 40, wherein the left reducer assembly 10 and the right reducer assembly 30 are located on both sides of the dual-motor assembly 20, and the electronic control assembly 40 is located on the front side of the dual-motor assembly 20. Among them, the left reducer assembly 10 includes a left reducer end cover 11 and a left reducer gear set; the dual-motor assembly 20 includes a housing 21, a motor cover 22, a first motor 23 and a second motor 24, the motor cover 22 is covered on the top of the housing 21, the first motor 23 and the second motor 24 are arranged inside the housing 21, the left reducer end cover 11 is covered on the left side of the housing 21, the left reducer gear set is arranged inside the left reducer end cover 11, and the output end of the first motor 23 is connected to the input end of the left reducer gear set; the right reducer assembly 30 includes a right reducer end cover 31 and a right reducer gear set, and the right reducer end cover 31 is covered on the housing 21, the right reducer gear set is arranged inside the right reducer end cover 31, and the output end of the second motor 24 is connected to the input end of the right reducer gear set; the electric control component 40 includes an electric control cover plate 41 and a power module, the electric control cover plate 41 is arranged on the front side of the housing 21, and the power module is arranged inside the electric control cover plate 41; the top of the left reducer component 10 is provided with a first heat exchanger 12, the bottom of the left reducer component 10 is provided with a first oil pump 14, the top of the right reducer component 30 is provided with a second heat exchanger 32, and the bottom of the right reducer component 30 is provided with a second oil pump 34; the bottom of the left reducer component 10 is provided with a left inlet The left oil inlet channel is connected to the inlet of the first oil pump 14, and the outlet of the first oil pump 14 is connected to the first oil circuit of the first heat exchanger 12. The housing 21 is provided with a left oil circuit 606, an oil injection circuit 611, a left motor cooling oil circuit 607 and an oil outlet channel 610. The left oil circuit 606 is connected to the first oil circuit of the first heat exchanger 12, the left oil circuit 606 is connected to the oil injection circuit 611, the left motor cooling oil circuit 607 is connected to the oil injection circuit 611, and the left motor cooling oil circuit 607 is used to provide cooling oil for cooling the first motor 23. The oil outlet channel 610 is communicated with the oil injection circuit 611, and the oil outlet channel 610 is used to cool the first motor 23. The cooling oil is transported to the left reducer assembly 10 and the right reducer assembly 30; a right oil inlet channel is provided at the bottom of the right reducer assembly 30, the right oil inlet channel is connected to the inlet of the second oil pump 34, the outlet of the second oil pump 34 is connected to the second oil circuit of the second heat exchanger 32, and a right oil circuit 615 and a right motor cooling oil circuit 614 are also provided in the housing 21, the right oil circuit 615 is connected to the second oil circuit of the second heat exchanger 32, the right oil circuit 615 is connected to the oil injection circuit 611, the right motor cooling oil circuit 614 is connected to the oil injection circuit 611, and the right motor cooling oil circuit 614 is used to provide cooling oil for the second motor 24 for cooling;A water inlet 42 is provided at the bottom of the electric control component 40, a cooling plate 43 is provided inside the electric control component 40, the cooling plate 43 forms a cooling area 501 inside the electric control component 40, the power module is located in the cooling area 501, the water inlet channel of the cooling plate 43 is connected to the water inlet 42, the first water outlet channel 504 of the cooling plate 43 is connected to the first water path of the first heat exchanger 12, the second water outlet channel 505 of the cooling plate 43 is connected to the second water path of the second heat exchanger 32, the first oil path of the first heat exchanger 12 exchanges heat with the first water path of the first heat exchanger 12, and the second oil path of the second heat exchanger 32 exchanges heat with the second water path of the second heat exchanger 32. ;

[0044] The distributed dual-motor cooling system provided by the present invention, when in use, cooling water enters the cooling plate 43 from the water inlet 42, the cooling range of the cooling plate 43 is the cooling area 501, the power module is cooled and dissipated, and after the cooling water passes through the cooling plate 43 to take away the heat, it enters the first heat exchanger 12 and the second heat exchanger 32 to exchange heat with the cooling oil for cooling. The overall cooling structure is very simple, without complex pipeline design, and water enters from the bottom and exits from the top, ensuring uniform heat dissipation of the power module, reducing the failure rate of the electronic control and increasing its service life; when the first oil pump 14 is turned on, the cooling oil is pumped out from the bottom of the left reducer assembly 10, enters the first oil pump 14 through the left oil inlet channel, and then the cooling oil enters the first heat exchanger 12. After heat exchange with the cooling water, the cooling oil flows out from the first heat exchanger 12, passes through the left oil circuit 606 to enter the oil injection circuit 611, and then passes through the left motor cooling oil circuit 607 and the right motor cooling oil circuit 614 Cooling oil is provided to the first motor 23 and the second motor 24 for cooling. The cooling oil in the oil filling circuit 611 flows into the left reducer assembly 10 and the right reducer assembly 30 through the oil outlet channel 610 to provide lubrication and cooling for the left reducer gear set and the right reducer gear set. When the second oil pump 34 is turned on, the cooling oil is pumped out from the bottom of the right reducer assembly 30, enters the second oil pump 34 through the right oil inlet channel, and then enters the second heat exchanger 32. After heat exchange with cooling water, the cooling oil flows out of the second heat exchanger 32, enters the oil filling circuit 611 through the right oil circuit 615, and then provides cooling oil to the first motor 23 and the second motor 24 through the left motor cooling oil circuit 607 and the right motor cooling oil circuit 614 for cooling. The cooling oil in the oil filling circuit 611 flows into the left reducer assembly 10 and the right reducer assembly 30 through the oil outlet channel 610 to provide lubrication and cooling for the left reducer gear set and the right reducer gear set.

[0045] The distributed dual-motor cooling system provided by the present invention can enable only the first oil pump 14 or the second oil pump 34 to cool the dual motors and the reducer when the heat generated by the assembly is low, thereby reducing the energy consumption of the entire vehicle; when the heat generated by the assembly is high, the first oil pump 14 and the second oil pump 34 can be enabled at the same time to cool the dual motors and the reducer to ensure normal driving of the entire vehicle under extreme working conditions; when the first oil pump 14 or the second oil pump 34 is damaged, the other undamaged oil pump can be started to cool the dual motors and the reducer to ensure that the entire vehicle can still drive normally under a local fault environment; the first oil pump 14 and the second oil pump 34 can be used intermittently and alternately to increase the service life of the oil pump; when on an inclined road, the oil pump on the lower side can be enabled according to the different inclination angles of the entire vehicle to prevent the cooling oil from being emptied and reduce the amount of refueling.

[0046] It should be noted that the cooling oil at the bottom of the left reducer assembly 10 in the present invention is connected to the cooling oil at the bottom of the right reducer assembly 30, so that when on an inclined road, the oil pump on the lower side can be activated according to the different inclination angles of the entire vehicle to prevent the phenomenon of emptying and reduce the amount of oil added. The cooling plate 43 is provided with a rib plate for dividing and guiding the cooling water and a heat dissipation column for enhancing the heat dissipation effect.

[0047] In some embodiments, the left oil inlet passage includes a left first oil inlet passage 601 and a left second oil inlet passage 602, the left first oil inlet passage 601 is connected to the left second oil inlet passage 602, the left first oil inlet passage 601 is communicated with the interior of the left reducer assembly 10, the left second oil inlet passage 602 is connected to the inlet of the first oil pump 14, and the bottom cooling oil in the left reducer assembly 10 is pumped out through the first oil pump 14 through the left first oil inlet passage 601 and the left second oil inlet passage 602. The right oil inlet passage includes a right first oil inlet passage 604 and a right second oil inlet passage 603, the right first oil inlet passage 604 is connected to the right second oil inlet passage 603, the right first oil inlet passage 604 is communicated with the interior of the right reducer assembly 30, the right second oil inlet passage 603 is connected to the inlet of the second oil pump 34, and the bottom cooling oil in the right reducer assembly 30 is pumped out through the second oil pump 34 through the right first oil inlet passage 604 and the right second oil inlet passage 603.

[0048] In some embodiments, the outlet of the first oil pump 14 is connected to the first oil circuit of the first heat exchanger 12 through the first lifting oil circuit 605, and the cooling oil is pumped out from the bottom of the left reducer assembly 10, enters the first oil pump 14 through the left oil inlet channel, and then enters the first heat exchanger 12 through the first lifting oil circuit 605; the outlet of the second oil pump 34 is connected to the second oil circuit of the second heat exchanger 32 through the second lifting oil circuit 616, and the cooling oil is pumped out from the bottom of the right reducer assembly 30, enters the second oil pump 34 through the right oil inlet channel, and then enters the second heat exchanger 32 through the second lifting oil circuit 616.

[0049] In some embodiments, the left motor cooling oil circuit 607 is provided with a plurality of first oil spray holes, and the right motor cooling oil circuit 614 is provided with a plurality of second oil spray holes. The cooling oil passing through the left motor cooling oil circuit 607 is sprayed on the surface of the first motor 23 through the first oil spray holes; the cooling oil passing through the right motor cooling oil circuit 614 is sprayed on the surface of the second motor 24 through the second oil spray holes.

[0050] In some embodiments, the oil injection path 611 is connected to a bearing lubricating oil passage 617, a bearing hole is provided in the housing 21, the bearing lubricating oil passage 617 is connected to the bearing hole, the motor bearing is installed in the bearing hole, and the bearing lubricating oil passage 617 is used to provide cooling oil to the motor bearing for lubrication. Through the above structure, it is possible to provide lubrication for the motor bearing.

[0051] In some embodiments, the left reducer end cover 11 is provided with a left first oil outlet passage 608 and a left second oil outlet passage 609, and the left first oil outlet passage 608 and the left second oil outlet passage 609 are connected to an oil outlet passage 610, and the left first oil outlet passage 608 and the left second oil outlet passage 609 are used to provide cooling oil for the left reducer gear set. The cooling oil in the oil injection passage 611 flows to the left first oil outlet passage 608 and the left second oil outlet passage 609 through the oil outlet passage 610, thereby providing lubrication and cooling for the left reducer gear set.

[0052] In some embodiments, the right reducer end cover 31 is provided with a right first oil outlet passage 613 and a right second oil outlet passage 612, and the right first oil outlet passage 613 and the right second oil outlet passage 612 are connected to the oil outlet passage 610, and the right first oil outlet passage 613 and the right second oil outlet passage 612 are used to provide cooling oil for the right reducer gear set. The cooling oil in the oil injection passage 611 flows to the right first oil outlet passage 613 and the right second oil outlet passage 612 through the oil outlet passage 610, thereby providing lubrication and cooling for the right reducer gear set.

[0053] In some embodiments, the left oil circuit 606 is provided with a first one-way valve 15; the right oil circuit 615 is provided with a second one-way valve 35. By providing the first one-way valve 15, it is possible to prevent the cooling oil passing through the right oil circuit 615 from flowing back to the left oil circuit 606, thereby reducing the cooling effect; by providing the second one-way valve 35, it is possible to prevent the cooling oil passing through the left oil circuit 606 from flowing back to the right oil circuit 615, thereby reducing the cooling effect. Of course, in other embodiments, the first one-way valve 15 can also be provided on the first oil circuit, the first lifting oil circuit 605, the left first oil inlet channel 601 or the left second oil inlet channel 602 of the first heat exchanger 12, and the second one-way valve 35 can also be provided on the second oil circuit, the second lifting oil circuit 616, the right first oil inlet channel 604 or the right second oil inlet channel 603 of the second heat exchanger 32.

[0054] In some embodiments, the first water outlet channel 504 of the cooling plate 43 is connected to the first left water channel 502, the first left water channel 502 is connected to the second left water channel 503, the second left water channel 503 is connected to the first water channel of the first heat exchanger 12; the second water outlet channel 505 of the cooling plate 43 is connected to the first right water channel 506, the first right water channel 506 is connected to the second right water channel 507, and the second right water channel 507 is connected to the second water channel of the second heat exchanger 32. A part of the cooling water of the cooling plate 43 flows to the first water channel of the first heat exchanger 12 through the first left water channel 502 and the second left water channel 503, and another part of the cooling water of the cooling plate 43 flows to the second water channel of the second heat exchanger 32 through the first right water channel 506 and the second right water channel 507.

[0055] In some embodiments, the first water circuit of the first heat exchanger 12 is connected to the first water outlet pipe 13; the second water circuit of the second heat exchanger 32 is connected to the second water outlet pipe 33. The water inlet 42 is connected to the outlet of the cooling water system on the vehicle, and the first water outlet pipe 13 and the second water outlet pipe 33 are connected to the inlet of the cooling water system on the vehicle, thereby realizing the circulation of cooling water.

[0056] The working principle of the distributed dual-motor cooling system provided by the present invention is as follows:

[0057] When the electronic control component 40 is cooled, cooling water enters the cooling plate 43 from the water inlet 42. The cooling range of the cooling plate 43 is the cooling area 501, which cools and dissipates the power module. After the cooling water takes away the heat through the cooling plate 43, it flows out through the first water outlet channel 504 and the second water outlet channel 505. A part of the cooling water of the cooling plate 43 flows from the first water outlet channel 504 through the first left water channel 502 and the second left water channel 503 to the first water channel of the first heat exchanger 12. Another part of the cooling water of the cooling plate 43 flows from the second water outlet channel 505 through the first right water channel 506 and the second right water channel 507 to the second water channel of the second heat exchanger 32. The cooling water exchanges heat with the cooling oil in the first heat exchanger 12 and the second heat exchanger 32, and finally flows out from the first water outlet pipe 13 and the second water outlet pipe 33.

[0058] When the first oil pump 14 is turned on, cooling oil is pumped out from the bottom of the left reducer assembly 10, enters the first oil pump 14 through the left first oil inlet channel 601 and the left second oil inlet channel 602, and then enters the first heat exchanger 12 through the first lifting oil channel 605. After heat exchange with cooling water, the cooling oil flows out of the first heat exchanger 12, enters the oil filling channel 611 through the left oil channel 606, and then provides cooling oil to the first motor 23 and the second motor 24 through the left motor cooling oil channel 607 and the right motor cooling oil channel 614 for cooling. The cooling oil in the oil filling channel 611 provides lubrication for the motor bearings through the bearing lubrication oil channel 617, and the cooling oil in the oil filling channel 611 flows through the oil outlet channel 610 to the left first oil outlet channel 608, the left second oil outlet channel 609, the right first oil outlet channel 613 and the right second oil outlet channel 612, thereby providing lubrication and cooling for the left reducer gear set and the right reducer gear set.

[0059] When the second oil pump 34 is turned on, cooling oil is pumped out from the bottom of the right reducer assembly 30, enters the second oil pump 34 through the right first oil inlet channel 604 and the right second oil inlet channel 603, and then enters the second heat exchanger 32 through the second lifting oil passage 616. After heat exchange with cooling water, the cooling oil flows out of the second heat exchanger 32, enters the oil filling passage 611 through the right oil passage 615, and then provides cooling oil to the first motor 23 and the second motor 24 through the left motor cooling oil passage 607 and the right motor cooling oil passage 614 for cooling. The cooling oil in the oil filling passage 611 provides lubrication for the motor bearings through the bearing lubrication oil passage 617, and the cooling oil in the oil filling passage 611 flows through the oil outlet passage 610 to the left first oil outlet passage 608, the left second oil outlet passage 609, the right first oil outlet passage 613 and the right second oil outlet passage 612, thereby providing lubrication and cooling for the left reducer gear set and the right reducer gear set.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A distributed dual-motor cooling system, characterized in that: It comprises a left reducer assembly, a dual motor assembly, a right reducer assembly and an electric control assembly, wherein the left reducer assembly and the right reducer assembly are located on both sides of the dual motor assembly, and the electric control assembly is located on the front side of the dual motor assembly; The left reducer assembly comprises a left reducer end cover and a left reducer gear set; The dual motor assembly comprises a housing, a motor cover, a first motor and a second motor, wherein the motor cover is disposed on the top of the housing, the first motor and the second motor are disposed inside the housing, the left reducer end cover is disposed on the left side of the housing, the left reducer gear set is disposed inside the left reducer end cover, and the output end of the first motor is connected to the input end of the left reducer gear set; The right reducer assembly comprises a right reducer end cover and a right reducer gear set, wherein the right reducer end cover is arranged on the right side of the housing, the right reducer gear set is arranged inside the right reducer end cover, and the output end of the second motor is connected to the input end of the right reducer gear set; The electric control assembly comprises an electric control cover plate and a power module, wherein the electric control cover plate is arranged at the front side of the housing, and the power module is arranged inside the electric control cover plate; A first heat exchanger is disposed on the top of the left reducer assembly, a first oil pump is disposed on the bottom of the left reducer assembly, a second heat exchanger is disposed on the top of the right reducer assembly, and a second oil pump is disposed on the bottom of the right reducer assembly; A left oil inlet passage is provided at the bottom of the left reducer assembly, the left oil inlet passage is connected to the inlet of the first oil pump, the outlet of the first oil pump is connected to the first oil circuit of the first heat exchanger, a left oil circuit, an oil injection circuit, a left motor cooling oil circuit and an oil outlet passage are provided in the shell, the left oil circuit is connected to the first oil circuit of the first heat exchanger, the left oil circuit is connected to the oil injection circuit, the left motor cooling oil circuit is connected to the oil injection circuit, the left motor cooling oil circuit is used to provide cooling oil for cooling the first motor, the oil outlet passage is communicated with the oil injection circuit, and the oil outlet passage is used to transport cooling oil to the left reducer assembly and the right reducer assembly; A right oil inlet passage is provided at the bottom of the right reducer assembly, the right oil inlet passage is connected to the inlet of the second oil pump, the outlet of the second oil pump is connected to the second oil circuit of the second heat exchanger, a right oil circuit and a right motor cooling oil circuit are also provided in the housing, the right oil circuit is connected to the second oil circuit of the second heat exchanger, the right oil circuit is connected to the oil injection circuit, the right motor cooling oil circuit is connected to the oil injection circuit, and the right motor cooling oil circuit is used to provide cooling oil for cooling the second motor; A water inlet is provided at the bottom of the electric control component, a cooling plate is provided in the electric control component, the cooling plate forms a cooling area in the electric control component, the power module is located in the cooling area, the water inlet channel of the cooling plate is connected to the water inlet, the first water outlet channel of the cooling plate is connected to the first water path of the first heat exchanger, the second water outlet channel of the cooling plate is connected to the second water path of the second heat exchanger, the first oil path of the first heat exchanger exchanges heat with the first water path of the first heat exchanger, and the second oil path of the second heat exchanger exchanges heat with the second water path of the second heat exchanger.

2. The distributed dual-motor cooling system according to claim 1, characterized in that: The left-side oil inlet channel includes a left-side first oil inlet channel and a left-side second oil inlet channel, the left-side first oil inlet channel is connected to the left-side second oil inlet channel, the left-side first oil inlet channel is communicated with the interior of the left reducer assembly, and the left-side second oil inlet channel is connected to the inlet of the first oil pump.

3. The distributed dual-motor cooling system according to claim 1, characterized in that: The right side oil inlet channel includes a right side first oil inlet channel and a right side second oil inlet channel, the right side first oil inlet channel is connected to the right side second oil inlet channel, the right side first oil inlet channel is communicated with the interior of the right reducer assembly, and the right side second oil inlet channel is connected to the inlet of the second oil pump.

4. The distributed dual-motor cooling system according to claim 1, characterized in that: The left motor cooling oil circuit is provided with a plurality of first oil spray holes, and the right motor cooling oil circuit is provided with a plurality of second oil spray holes.

5. The distributed dual-motor cooling system according to claim 1, characterized in that: The oil filling passage is connected to a bearing lubricating oil passage, a bearing hole is provided in the housing, the bearing lubricating oil passage is connected to the bearing hole, the motor bearing is installed in the bearing hole, and the bearing lubricating oil passage is used to provide cooling oil to the motor bearing for lubrication.

6. The distributed dual-motor cooling system according to claim 1, characterized in that: The left reducer end cover is provided with a left first oil outlet passage and a left second oil outlet passage, and the left first oil outlet passage and the left second oil outlet passage are connected to the oil outlet passage, and the left first oil outlet passage and the left second oil outlet passage are used to provide cooling oil for the left reducer gear set.

7. The distributed dual-motor cooling system according to claim 1, characterized in that: The right reducer end cover is provided with a first oil outlet passage on the right side and a second oil outlet passage on the right side, and the first oil outlet passage on the right side and the second oil outlet passage on the right side are connected with the oil outlet passage, and the first oil outlet passage on the right side and the second oil outlet passage on the right side are used to provide cooling oil for the right reducer gear set.

8. The distributed dual-motor cooling system according to claim 1, characterized in that: The left oil circuit is provided with a first one-way valve; The right oil circuit is provided with a second one-way valve.

9. The distributed dual-motor cooling system according to claim 1, characterized in that: The first water outlet channel of the cooling plate is connected to a first left water channel, the first left water channel is connected to a second left water channel, and the second left water channel is connected to the first water channel of the first heat exchanger; The second water outlet channel of the cooling plate is connected to the first right water channel, the first right water channel is connected to the second right water channel, and the second right water channel is connected to the second water channel of the second heat exchanger.

10. The distributed dual-motor cooling system according to claim 1, characterized in that: The first water channel of the first heat exchanger is connected to a first water outlet pipe; The second water channel of the second heat exchanger is connected to a second water outlet pipe.

Images