Passive oil cooling system

Abstract

The utility model discloses a passive oil cooling system which comprises a speed reducer shell, a cover plate, an input shaft system oil cooling unit, an intermediate shaft system oil cooling unit and an output shaft system oil cooling unit, the cover plate covers the speed reducer shell, and an input shaft system mounting position, an intermediate shaft system mounting position and an output shaft system mounting position are arranged in the speed reducer shell and the cover plate respectively. The input shaft system oil cooling unit is arranged at an input shaft system mounting position, the intermediate shaft system oil cooling unit is arranged at an intermediate shaft system mounting position, the output shaft system oil cooling unit is mounted at an output shaft system mounting position, and the intermediate shaft system oil cooling unit is communicated with the output shaft system oil cooling unit; an arc-shaped oil baffle plate is arranged below the input shaft system installation position in the speed reducer shell, and a first oil storage hopper is formed between the oil baffle plate and the inner wall of the speed reducer shell. The working efficiency and the cooling effect of the speed reducer can be both considered.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive housings, in particular to a passive oil cooling system for cooling a reducer. Background Art

[0002] The oil cooling system within the reducer housing of new energy vehicles is a crucial component of their electric drive systems. With the rapid development of new energy vehicles, performance requirements for electric drive systems are becoming increasingly demanding. Traditional air cooling methods are no longer sufficient to meet the heat dissipation requirements of high-power density motors, so oil cooling technology is becoming an increasingly important option for these systems.

[0003] The oil cooling inside the existing reducer housing usually adopts the oil immersion type. Half of the gears and shafts inside the reducer are immersed in oil. The rotation of the gears drives the oil to splash and cool the gears and shafts of the reducer.

[0004] However, when there is too much oil, it will affect the working efficiency of the reducer; if there is too little oil, it will affect the cooling effect.

[0005] Therefore, it is necessary to design a passive oil cooling system that can take into account both the working efficiency and cooling effect of the reducer. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a passive oil cooling system that can take into account both the working efficiency and cooling effect of the reducer.

[0007] The technical solution of the utility model provides a passive oil cooling system, comprising a reducer housing and a cover plate, wherein the cover plate is arranged on the reducer housing, and the reducer housing and the cover plate are both provided with an input shaft system mounting position, an intermediate shaft system mounting position, and an output shaft system mounting position, and further comprising an input shaft system oil cooling unit, an intermediate shaft system oil cooling unit, and an output shaft system oil cooling unit, wherein the input shaft system oil cooling unit is arranged at the input shaft system mounting position, the intermediate shaft system oil cooling unit is arranged at the intermediate shaft system mounting position, the output shaft system oil cooling unit is mounted at the output shaft system mounting position, and the intermediate shaft system oil cooling unit is connected to the output shaft system oil cooling unit;

[0008] An arc-shaped oil baffle is provided below the input shaft system installation position in the reducer housing, and a first oil storage hopper is formed between the oil baffle and the inner wall of the reducer housing.

[0009] Furthermore, the input shaft oil cooling unit includes a first oil storage tank and a first oil channel, the first oil storage tank and the first oil channel are arranged in the reducer housing, and the first oil storage tank is located above the input shaft mounting position, and the first oil channel connects the first oil storage tank to the housing input bearing mounting groove of the input shaft mounting position.

[0010] Furthermore, the intermediate shafting oil cooling unit includes a second oil storage tank and a second oil channel, the second oil storage tank and the second oil channel are arranged in the reducer housing, the second oil storage tank is located above the intermediate shafting mounting position, the second oil channel connects the second oil storage tank to the intermediate bearing mounting groove of the housing of the intermediate shafting mounting position, and a first oil dam is provided between the first oil storage tank and the second oil storage tank.

[0011] Furthermore, the intermediate bearing installation groove of the housing and the output bearing installation groove of the housing are connected through a third oil passage.

[0012] Furthermore, the output shaft oil cooling unit includes a second oil dam and a fourth oil channel, the second oil dam and the fourth oil channel are arranged in the reducer housing, the second oil dam is connected between the housing intermediate bearing mounting groove and the housing output bearing mounting groove and is located above the third oil channel, and the fourth oil channel is connected between the second oil dam and the housing output bearing mounting groove.

[0013] Furthermore, a second oil storage hopper is provided above the output shaft system installation position in the reducer housing, and a gap is provided in the middle of the second oil storage hopper, and the gap corresponds to the output gear of the reducer.

[0014] Furthermore, a first oil guide groove, a third oil storage groove and a first oil hole are provided above the input shaft system mounting position in the cover plate. One end of the first oil guide groove is located above the intermediate shaft system mounting position, and the other end is connected to the third oil storage groove. The first oil hole is connected to the third oil storage groove and the cover plate input bearing mounting groove.

[0015] Furthermore, a second oil guide groove, a fourth oil storage groove and a fifth oil channel are provided above the intermediate shaft system mounting position in the cover plate, a third oil dam is provided between the second oil guide groove and the first oil guide groove, the fourth oil storage groove connects the second oil guide groove and the fifth oil channel, and the fifth oil channel connects the fourth oil storage groove and the intermediate bearing mounting groove of the cover plate.

[0016] Furthermore, a fifth oil storage tank and a second oil hole are provided above the output shaft system mounting position in the cover plate, and the second oil hole connects the fifth oil storage tank and the cover plate output bearing mounting groove.

[0017] Furthermore, a sixth oil channel is provided between the cover plate intermediate bearing installation groove and the cover plate output bearing installation groove, and the sixth oil channel is used to transport the oil at the cover plate intermediate bearing installation groove to the cover plate output bearing installation groove.

[0018] The above technical solution has the following beneficial effects:

[0019] This utility model cools the gears and bearings of the reducer by providing an input shaft oil cooling unit, an intermediate shaft oil cooling unit, and an output shaft oil cooling unit. An oil dam, located below the input shaft mounting area, serves to block, store, and drain oil. The intermediate shaft oil cooling unit is connected to the output shaft oil cooling unit, transferring excess oil from the intermediate shaft oil cooling unit to the output shaft oil cooling unit. This allows gears and bearings throughout the reducer to be cooled, optimizing the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0021] Figure 1 This is an exploded view of the reducer housing and cover plate in one embodiment of the present utility model;

[0022] Figure 2 It is a schematic diagram of a reducer housing in one embodiment of the present utility model;

[0023] Figure 3 This is a partial enlarged view of the input shaft system installation position of the reducer housing in one embodiment of the present utility model;

[0024] Figure 4 This is a partial enlarged view of the intermediate shaft system installation position of the reducer housing in one embodiment of the present utility model;

[0025] Figure 5 This is a partial enlarged view of the intermediate shaft system installation position and the output shaft system installation position of the reducer housing in one embodiment of the present utility model;

[0026] Figure 6 This is a partial enlarged view of the output shaft system installation position of the reducer housing in one embodiment of the present utility model;

[0027] Figure 7 It is a schematic diagram of a cover plate in one embodiment of the present utility model;

[0028] Figure 8 This is a partial enlarged view of the input shaft system installation position of the cover plate in one embodiment of the present utility model;

[0029] Figure 9This is a partial enlarged view of the intermediate shaft system installation position of the cover plate in one embodiment of the present utility model;

[0030] Figure 10 This is a partial enlarged view of the intermediate shaft system installation position of the cover plate in one embodiment of the present utility model;

[0031] Figure 11 It is a partial enlarged view of the intermediate shaft system installation position and the output shaft system installation position of the cover plate in one embodiment of the present utility model.

[0032] Reference table of accompanying symbols:

[0033] Reducer housing 1: oil baffle 11, first oil storage hopper 12, oil dam 13, oil storage ladder 14;

[0034] Cover plate 2, input shaft system installation position 3, intermediate shaft system installation position 4, output shaft system installation position 5;

[0035] First oil storage tank 31, first oil channel 32, housing input bearing mounting groove 33, first oil guide groove 34, third oil storage tank 35, first oil hole 36, cover plate input bearing mounting groove 37;

[0036] Second oil reservoir 41, second oil passage 42, first oil dam 43, housing intermediate bearing mounting groove 44, second oil guide groove 45, fourth oil reservoir 46, fifth oil passage 47, third oil dam 48, cover plate intermediate bearing mounting groove 49;

[0037] Housing output bearing mounting groove 51, third oil channel 52, second oil dam 53, fourth oil channel 54, second oil storage hopper 55, fifth oil storage tank 56, second oil hole 57, sixth oil channel 58, cover plate output bearing mounting groove 59, notch 551. DETAILED DESCRIPTION

[0038] The specific implementation of the present utility model will be further described below with reference to the accompanying drawings.

[0039] It is easy to understand that according to the technical solution of the present invention, a variety of structural methods and implementation methods can be replaced by those skilled in the art without changing the essential spirit of the present invention. Therefore, the following specific embodiments and drawings are only illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the utility model.

[0040] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the drawings. They are relative concepts and may vary depending on the location and usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0041] In some embodiments of the present invention, Figure 1-Figure 2 and Figure 8 As shown, the passive oil cooling system includes a reducer housing 1 and a cover plate 2. The cover plate 2 is arranged on the reducer housing 1. The reducer housing 1 and the cover plate 2 are both provided with an input shaft system mounting position 3, an intermediate shaft system mounting position 4 and an output shaft system mounting position 5. The system also includes an input shaft system oil cooling unit, an intermediate shaft system oil cooling unit and an output shaft system oil cooling unit. The input shaft system oil cooling unit is arranged at the input shaft system mounting position 3, the intermediate shaft system oil cooling unit is arranged at the intermediate shaft system mounting position 4, and the output shaft system oil cooling unit is arranged at the output shaft system mounting position 5.

[0042] An arc-shaped oil baffle plate 11 is provided below the input shaft system installation position 3 in the reducer housing 1 , and a first oil storage hopper 12 is formed between the oil baffle plate 11 and the inner wall of the reducer housing 1 .

[0043] Specifically, Figure 1 As shown, the reducer housing 1 is used to install the gears and bearings of the reducer, and the cover plate 2 is arranged on one side of the reducer housing 1 and forms a closed cavity with the reducer housing 1, which is used to install the reducer.

[0044] The reducer consists of an input shaft system, an intermediate shaft system, and an output shaft system. The input shaft system is connected to the motor, the intermediate shaft system is connected between the input and output shaft systems, and the output shaft system is used to connect to the external wheel axle. The motor transmits power to the input shaft system. After the power of the input shaft system is reduced by the intermediate shaft system and the output shaft system, the output shaft system transmits the power to the wheel axle, thereby driving the wheel rotation.

[0045] like Figure 2 and Figure 8 As shown, the reducer housing 1 and the cover plate 2 are provided with an input shaft system mounting position 3, an intermediate shaft system mounting position 4 and an output shaft system mounting position 5, which are used to install bearings and gears of the input shaft system, intermediate shaft system and output shaft system respectively.

[0046] The passive oil cooling system also includes an input shaft system oil cooling unit, an intermediate shaft system oil cooling unit and an output shaft system oil cooling unit. The input shaft system oil cooling unit is set at the input shaft system mounting position 3, the intermediate shaft system oil cooling unit is set at the intermediate shaft system mounting position 4, and the output shaft system oil cooling unit is installed at the output shaft system mounting position 5. They are used to cool the bearings and gears on the input shaft system, intermediate shaft system and output shaft system respectively, thereby optimizing the cooling effect.

[0047] Among them, Figure 2-Figure 3 As shown, an arc-shaped oil baffle 11 is provided below the input shaft system mounting position 3, and the first end of the oil baffle 11 is connected to the inner wall of the reducer housing 1, and the other end of the oil baffle 11 is tilted upward, so that an angle is formed between the oil baffle 11 and the inner wall of the reducer housing 1, thereby from the first oil storage hopper 12, the first oil storage hopper 12 can store a certain amount of oil, play the role of oil storage, and increase the cooling effect on the gears and bearings of the input shaft system.

[0048] When the oil in the first oil storage hopper 12 exceeds the highest point of the other end of the oil baffle 11, the excess oil flows away, and the oil baffle 11 plays the role of oil drainage.

[0049] In addition, the lower surface of the oil baffle 11 also plays the role of blocking oil, reducing excessive oil at the bottom from soaking the gears of the input shaft system, thereby avoiding affecting the working efficiency of the gears of the input shaft system.

[0050] Therefore, the oil baffle 11 and the first oil storage hopper 12 can simultaneously have the functions of blocking, storing and draining oil, so that the gears and bearings of the input shaft system can be sufficiently cooled while preventing excessive oil from affecting work efficiency.

[0051] Further, if Figure 3 As shown, the input shaft oil cooling unit includes a first oil storage tank 31 and a first oil channel 32. The first oil storage tank 31 and the first oil channel 32 are arranged in the reducer housing 1, and the first oil storage tank 31 is located above the input shaft installation position 3. The first oil channel 32 connects the first oil storage tank 31 to the housing input bearing installation groove 33 of the input shaft installation position 3.

[0052] The first oil storage tank 31 is used to store oil, and the first oil passage 32 is relatively narrow, which can slowly transport the oil in the first oil storage tank 31 to the housing input bearing mounting groove 33 to cool the input bearing installed in the housing input bearing mounting groove 33.

[0053] Further, if Figure 4 As shown, the intermediate shafting oil cooling unit includes a second oil storage tank 41 and a second oil channel 42. The second oil storage tank 41 and the second oil channel 42 are arranged in the reducer housing 1. The second oil storage tank 41 is located above the intermediate shafting mounting position 4. The second oil channel 42 connects the second oil storage tank 41 to the intermediate bearing mounting groove 44 of the housing of the intermediate shafting mounting position 4. A first oil dam 43 is provided between the first oil storage tank 31 and the second oil storage tank 41.

[0054] The second oil reservoir 41 is used to store oil, and the second oil passage 42 is relatively narrow, allowing the oil in the second oil reservoir 41 to be slowly transported to the intermediate bearing mounting groove 44 of the housing, thereby cooling the intermediate bearing therein. A first oil dam 43 is provided between the first oil reservoir 31 and the second oil reservoir 41. The first oil dam 43 separates the first oil reservoir 31 from the second oil reservoir 41, preventing the oil in the second oil reservoir 41 from flowing into the first oil reservoir 31.

[0055] Further, if Figure 5 As shown, the housing intermediate bearing installation groove 44 and the housing output bearing installation groove 51 are connected via a third oil passage 52 .

[0056] Among them, the third oil channel 52 is an oil channel opened inside the reducer housing 1. The two ends of the third oil channel 52 are respectively connected to the housing intermediate bearing mounting groove 44 and the housing output bearing mounting groove 51, and the end located in the housing intermediate bearing mounting groove 44 is higher than the end located in the housing output bearing mounting groove 51. Therefore, the oil in the housing intermediate bearing mounting groove 44 can be transported to the housing output bearing mounting groove 51, thereby increasing the cooling of the output bearing.

[0057] Further, if Figure 5 As shown, the output shaft oil cooling unit includes a second oil dam 53 and a fourth oil channel 54. The second oil dam 53 and the fourth oil channel 54 are arranged in the reducer housing 1. The second oil dam 53 is connected between the housing intermediate bearing mounting groove 44 and the housing output bearing mounting groove 51 and is located above the third oil channel 52. The fourth oil channel 54 is connected between the second oil dam 53 and the housing output bearing mounting groove 51.

[0058] The second oil dam 53 is connected between the intermediate bearing mounting slot 44 and the output bearing mounting slot 51, and slopes downward toward one side of the output bearing mounting slot 51. The second oil dam 53 serves as an oil reservoir and feeds the oil into the fourth oil passage 54, where it then flows into the output bearing mounting slot 51, cooling the output bearing.

[0059] Further, if Figure 5-Figure 6 As shown, a second oil storage hopper 55 is provided above the output shaft system mounting position 5 in the reducer housing 1. A notch 551 is provided in the middle of the second oil storage hopper 55. The notch 551 corresponds to the output gear of the reducer (not shown).

[0060] The second oil storage hopper 55 also plays the role of storing oil, and the gap 551 can slowly drip the oil downward onto the output gear of the reducer, thereby cooling the output gear.

[0061] Further, if Figure 7As shown, a plurality of oil dams 13 are provided below the output bearing mounting groove 51 of the housing, and oil storage steps 14 are formed between adjacent oil dams 13. The heights of the plurality of oil storage steps 14 increase successively, and the oil can be brought to the plurality of oil storage steps 14 as the output gear of the output shaft system rotates. The oil storage steps 14 can increase the oil storage and reduce the speed at which the oil flows back to the bottom of the reducer housing 1, thereby better cooling the output shaft system.

[0062] Further, if Figure 8-Figure 9 As described above, a first oil guide groove 34, a third oil storage groove 35 and a first oil hole 36 are provided above the input shaft system mounting position 3 in the cover plate 2. One end of the first oil guide groove 34 is located above the intermediate shaft system mounting position 4, and the other end is connected to the third oil storage groove 35. The first oil hole 36 connects the third oil storage groove 35 and the cover plate input bearing mounting groove 37.

[0063] Among them, the first oil guide groove 34 is an arc-shaped groove and is located to the upper right of the intermediate shaft system mounting position 4. The first oil guide groove 34 transports the oil to the third oil storage tank 35, and then slowly transports the oil to the cover plate input bearing mounting groove 37 through the first oil hole 36 to cool the input bearing.

[0064] Further, if Figure 10 As shown, a second oil guide groove 45, a fourth oil storage groove 46 and a fifth oil channel 47 are provided above the intermediate shaft system mounting position 4 in the cover plate 2. A third oil dam 48 is provided between the second oil guide groove 45 and the first oil guide groove 34. The fourth oil storage groove 46 connects the second oil guide groove 45 and the fifth oil channel 47. The fifth oil channel 47 connects the fourth oil storage groove 46 and the cover plate intermediate bearing mounting groove 49.

[0065] The second oil guide groove 45 is also an arc-shaped groove and is located to the upper left of the intermediate shafting mounting position 4. The second oil guide groove 45 is separated from the first oil guide groove 34 by a third oil dam 48. The second oil guide groove 45 transfers oil to the fourth oil reservoir 46, which is then slowly fed through the fifth oil passage 47 to the intermediate bearing mounting groove 49 in the cover plate to cool the intermediate bearing.

[0066] Further, if Figure 11 As shown, a fifth oil storage tank 56 and a second oil hole 57 are provided above the output shaft system mounting position 5 in the cover plate 2 , and the second oil hole 57 connects the fifth oil storage tank 56 and the cover plate output bearing mounting groove 59 .

[0067] The fifth oil storage tank 56 is used to store oil, and the second oil hole 57 slowly transports the oil to the cover plate output bearing mounting groove 59 to cool the output bearing.

[0068] Further, if Figure 11As shown, a sixth oil passage 58 is provided between the cover plate intermediate bearing mounting groove 49 and the cover plate output bearing mounting groove 59 in the cover plate 2 . The sixth oil passage 58 is used to transport the oil at the cover plate intermediate bearing mounting groove 49 to the cover plate output bearing mounting groove 59 .

[0069] Among them, the sixth oil channel 58 is opened inside the cover plate 2 and connects the cover plate intermediate bearing installation groove 49 and the cover plate output bearing installation groove 59. The oil flows into the cover plate output bearing installation groove 59 along the direction of the arrow to cool the output bearing.

[0070] In the present invention, the reducer is installed in a cavity between the reducer housing 1 and the cover plate 2. There is a portion of oil at the bottom of the cavity, and some gears of the reducer are immersed in the oil. When the gears of the reducer rotate, the gears can drive the oil to splash, and can bring the oil into various oil storage tanks, or oil storage buckets, or oil storage ladders, or oil dams, or oil channels, or oil holes. In addition, an oil pump can also be installed in the reducer housing 1 of the present invention. The oil pump can transport the oil to various positions of the reducer housing 1 and the cover plate 2, and then flow into various oil storage tanks, or oil storage buckets, or oil storage ladders, or oil dams, or oil channels, or oil holes, to achieve sufficient cooling of the various gears and bearings in the reducer and optimize the cooling effect.

[0071] The above description is only the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other variations can be made, which should also be considered as the scope of protection of the present invention.

Claims

1. A passive oil cooling system, comprising a reducer housing and a cover plate, wherein the cover plate is arranged on the reducer housing, and the reducer housing and the cover plate are both provided with an input shaft system mounting position, an intermediate shaft system mounting position, and an output shaft system mounting position, characterized in that: The invention also includes an input shaft system oil cooling unit, an intermediate shaft system oil cooling unit and an output shaft system oil cooling unit, wherein the input shaft system oil cooling unit is arranged at the input shaft system mounting position, the intermediate shaft system oil cooling unit is arranged at the intermediate shaft system mounting position, the output shaft system oil cooling unit is mounted at the output shaft system mounting position, and the intermediate shaft system oil cooling unit is in communication with the output shaft system oil cooling unit; An arc-shaped oil baffle is provided below the input shaft system installation position in the reducer housing, and a first oil storage hopper is formed between the oil baffle and the inner wall of the reducer housing.

2. The passive oil cooling system according to claim 1, characterized in that: The input shaft oil cooling unit includes a first oil storage tank and a first oil channel. The first oil storage tank and the first oil channel are arranged in the reducer housing, and the first oil storage tank is located above the input shaft installation position. The first oil channel connects the first oil storage tank to the housing input bearing installation groove of the input shaft installation position.

3. The passive oil cooling system according to claim 2, characterized in that: The intermediate shafting oil cooling unit includes a second oil storage tank and a second oil channel. The second oil storage tank and the second oil channel are arranged in the reducer housing. The second oil storage tank is located above the intermediate shafting installation position. The second oil channel connects the second oil storage tank to the intermediate bearing installation groove of the housing of the intermediate shafting installation position. A first oil dam is provided between the first oil storage tank and the second oil storage tank.

4. The passive oil cooling system according to claim 1, characterized in that: The intermediate bearing installation groove of the housing is connected to the output bearing installation groove of the housing via a third oil passage.

5. The passive oil cooling system according to claim 4, characterized in that: The output shaft oil cooling unit includes a second oil dam and a fourth oil channel, which are arranged in the reducer housing. The second oil dam is connected between the housing intermediate bearing mounting groove and the housing output bearing mounting groove and is located above the third oil channel. The fourth oil channel is connected between the second oil dam and the housing output bearing mounting groove.

6. The passive oil cooling system according to claim 1, characterized in that: A second oil storage hopper is provided above the output shaft system installation position in the reducer housing, and a notch is provided in the middle of the second oil storage hopper, and the notch corresponds to the output gear of the reducer.

7. The passive oil cooling system according to claim 1, characterized in that: A first oil guide groove, a third oil storage groove and a first oil hole are provided above the input shaft system mounting position in the cover plate. One end of the first oil guide groove is located above the intermediate shaft system mounting position, and the other end is connected to the third oil storage groove. The first oil hole is connected to the third oil storage groove and the cover plate input bearing mounting groove.

8. The passive oil cooling system according to claim 7, characterized in that: A second oil guide groove, a fourth oil storage groove and a fifth oil channel are provided above the intermediate shaft system mounting position in the cover plate. A third oil dam is provided between the second oil guide groove and the first oil guide groove. The fourth oil storage groove connects the second oil guide groove and the fifth oil channel. The fifth oil channel connects the fourth oil storage groove and the intermediate bearing mounting groove of the cover plate.

9. The passive oil cooling system according to claim 1, characterized in that: A fifth oil storage tank and a second oil hole are provided above the output shaft system mounting position in the cover plate, and the second oil hole connects the fifth oil storage tank and the cover plate output bearing mounting groove.

10. The passive oil cooling system according to claim 1, characterized in that: A sixth oil passage is provided between the cover plate intermediate bearing installation groove and the cover plate output bearing installation groove, and the sixth oil passage is used to transport the oil at the cover plate intermediate bearing installation groove to the cover plate output bearing installation groove.

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