Speed reducer with shell capable of achieving bidirectional oil collection and lubrication and power assembly

Abstract

The utility model provides a speed reducer with a shell capable of achieving two-way oil collection and lubrication and a power assembly. The speed reducer comprises two opposite shells, the inner walls of the shells are used for fixing two bearings corresponding to the same gear, the inner walls of the shells comprise annular protrusions and two strip-shaped protrusions, and the annular protrusions contain the bearings and comprise lubricating oil channels communicating the inner circumferential face and the outer circumferential face of the annular protrusions. The length direction of at least one strip-shaped protrusion intersects with or is parallel to the radial direction of one gear, one strip-shaped protrusion is arranged on the side, in the clockwise direction, of the other strip-shaped protrusion at intervals, and each strip-shaped protrusion comprises one end facing a lubricating inlet of the lubricating oil channel and is spaced from the outer circumferential face of the annular protrusion. One strip-shaped protrusion collects lubricating oil stirred up by the gear in the anticlockwise direction and guides the lubricating oil to the lubricating inlet, and the two strip-shaped protrusions collect lubricating oil stirred up by the gear in the clockwise direction at intervals and guide the lubricating oil to the lubricating inlet. According to the speed reducer, the passive lubrication requirement of the bearing under the clockwise and anticlockwise rotation working conditions can be met, and the structural arrangement is simple.

Description

Technical Field

[0001] The disclosed embodiments relate to the field of electric vehicles, and in particular to a reducer and a power assembly with bidirectional oil collection and lubrication of the housing. Background Art

[0002] In electric vehicles, a reducer is usually used to connect the drive motor and the wheels. During the operation of the reducer, the bearings of the gear assembly need to be lubricated. If the bearings are not lubricated sufficiently, the bearings will wear out during rotation. In addition, the heat generated by the friction of the bearings cannot be removed in time, which may cause the bearings to overheat.

[0003] At present, the lubrication of reducer bearings usually requires the use of additional oil collecting tanks or oil spray devices to guide the lubricating oil to the bearings, which is not conducive to the miniaturization of the reducer or the powertrain, and cannot take into account the working conditions of the reducer rotating counterclockwise or clockwise. Utility Model Content

[0004] The disclosed embodiment provides a reducer and a power assembly with bidirectional oil collection lubrication in the housing, which can solve the technical problems existing in the related art. Specifically, the technical solution is as follows.

[0005] On the one hand, a reducer with bidirectional oil collection lubrication of a housing is provided, the reducer is used for transmission connection of a driving motor and a wheel of an electric vehicle, the reducer comprises two housings arranged opposite to each other, the inner walls of the two housings are respectively used to fix two bearings corresponding to the same gear in the reducer, and the inner wall of one housing comprises:

[0006] an annular protrusion, the annular protrusion is used to accommodate and fix a bearing of a gear, the annular protrusion includes a lubricating oil passage, the lubricating oil passage is used to connect the inner peripheral surface and the outer peripheral surface of the annular protrusion;

[0007] Two strip-shaped protrusions, at least one of which has a length direction that intersects or is parallel to the radial direction of the one gear, one of which is arranged at a distance on one side of the other strip-shaped protrusion along the clockwise direction, each of which includes an end facing the lubrication inlet of the lubricating oil passage, and the one end of the strip-shaped protrusion is spaced from the outer peripheral surface of the annular protrusion;

[0008] Among them, the one strip-shaped protrusion is used to collect the lubricating oil stirred up by the one gear in the counterclockwise direction and guide it to the lubrication inlet, and the interval between the one strip-shaped protrusion and the other strip-shaped protrusion is used to collect the lubricating oil stirred up by the one gear rotating in the clockwise direction and guide it to the lubrication inlet.

[0009] The reducer provided by the embodiment of the present disclosure improves the structure of the housing, and forms two strip-shaped protrusions and an annular protrusion with a lubricating oil channel on the inner wall thereof, which can cooperate to form a two-way passive lubrication structure of the bearing. Specifically, by making the length direction of at least one strip-shaped protrusion intersect or be parallel to the radial direction of a gear, the strip-shaped protrusions can play the role of a lubricating oil baffle and a guide rib. By making a strip-shaped protrusion arranged at intervals on one side of another strip-shaped protrusion in the clockwise direction, when the gear rotates in the counterclockwise direction, the lubricating oil stirred up by the gear flows along the inner wall of the housing in the counterclockwise direction and is blocked and collected by the strip-shaped protrusion, so that the strip-shaped protrusion guides the lubricating oil stirred up by the gear in the counterclockwise direction to the lubrication inlet. When the gear rotates in the clockwise direction, the lubricating oil stirred up by the gear flows along the inner wall of the housing in the clockwise direction and is blocked by the strip-shaped protrusions. At the same time, the strip-shaped protrusions prevent the lubricating oil from falling freely due to gravity, so that the intervals between the strip-shaped protrusions and the strip-shaped protrusions can collect the lubricating oil stirred up by the gear in the clockwise direction and guide it to the lubrication inlet. By opening a lubricating oil channel on the annular protrusion that accommodates the bearing, the lubricating oil channel is used to connect the inner circumference and the outer circumference of the annular protrusion. In this way, the lubricating oil introduced into the lubrication inlet passes through the lubricating oil channel, thereby smoothly reaching the bearing, thereby achieving lubrication and cooling of the bearing. It can be seen that the reducer provided in the embodiment of the present disclosure has a housing with a two-way oil collection and lubrication function, which can not only take into account the passive lubrication requirements of the bearings of the gears under forward and reverse conditions, but also has the advantage of a simple structural arrangement.

[0010] In some possible implementations, the height of one of the strip-shaped protrusions along the axial direction of the one gear is greater than the height of the other strip-shaped protrusion along the axial direction of the one gear. By making the height of the strip-shaped protrusion relatively large, it is beneficial to fully collect the lubricating oil stirred up by the gear. By making the height of the strip-shaped protrusion relatively small, it is not only possible for the strip-shaped protrusion to fully block the flowing lubricating oil falling due to gravity, but also beneficial to further reduce the volume and weight of the strip-shaped protrusion, which is beneficial to the lightweight design of the housing.

[0011] In some possible implementations, the length of one strip protrusion is greater than the length of the other strip protrusion. On the basis of ensuring the bidirectional oil collection effect of the strip protrusion, the length of the strip protrusion is designed to be smaller, which is also conducive to the lightweight design of the shell.

[0012] In some possible implementations, each of the strip-shaped protrusions also includes another end facing away from the lubrication inlet of the lubrication oil channel, and the distance between the other end of the one strip-shaped protrusion and the outer peripheral surface of the annular protrusion is greater than the distance between the other end of the other strip-shaped protrusion and the outer peripheral surface of the annular protrusion.

[0013] In some possible implementations, the height of one end of at least one of the two strip-shaped protrusions is greater than the height of the other end. Such a configuration can not only ensure that the strip-shaped protrusions can fully and reliably block the lubricating oil, but also help reduce the volume and weight of the strip-shaped protrusions, and further facilitate the lightweight design of the housing.

[0014] In some possible implementations, a distance between the other end of the other strip-shaped protrusion and the one strip-shaped protrusion is greater than a distance between the one end of the other strip-shaped protrusion and the one strip-shaped protrusion.

[0015] In some possible implementations, the outer circumferential surface of the annular protrusion includes the lubrication inlet of the lubrication oil passage, the inner circumferential surface of the annular protrusion includes the lubrication outlet of the lubrication oil passage, and the length direction of the strip protrusion passes through the lubrication inlet. This not only allows the lubrication oil flowing in the clockwise direction to fully and reliably enter the interval area between the strip protrusions, but also facilitates the gathering of the lubrication oil located at the interval between the strip protrusions, so that it gathers at one end of the strip protrusion, and then smoothly enters the lubrication inlet of the lubrication oil passage.

[0016] In some possible implementations, the annular protrusion includes a notch, the notch is used to form the lubricating oil channel, the notch includes a groove wall and another groove wall arranged in a counterclockwise direction, wherein: the groove wall is arranged in a clockwise direction on one side of the strip-shaped protrusion; the other groove wall is arranged in a counterclockwise direction on the other side of the strip-shaped protrusion. The notch makes the lubricating oil channel present a semi-open cavity structure, which has the advantage of making the molding and preparation process of the lubricating oil channel simpler and easier to operate, and also facilitates the lubricating oil to enter the lubricating oil channel formed by the notch in both directions.

[0017] In some possible implementations, the interval between the one groove wall and the one strip-shaped protrusion is less than or equal to the interval between one end of the other strip-shaped protrusion and the one end of the one strip-shaped protrusion. This not only ensures that there is enough space between the other groove wall of the notch and the one strip-shaped protrusion to guide the lubricating oil, but also the strip-shaped protrusion can reliably block the lubricating oil that may overflow from the lubricating inlet due to gravity.

[0018] In some possible implementations, the distance between one groove wall and one strip-shaped protrusion is greater than the distance between one end of another strip-shaped protrusion and the outer peripheral surface of the annular protrusion, which helps to enhance the blocking effect of the strip-shaped protrusion on the lubricating oil falling due to gravity.

[0019] In some possible implementations, an inner wall of the shell includes two strip grooves, wherein: one strip groove is arranged on one side of the strip protrusion along the clockwise direction, and the strip groove is used to connect the gap between the groove wall and the strip protrusion; the other strip groove is arranged on the other side of the strip protrusion along the counterclockwise direction, and the other strip groove is used to connect the other groove wall and the gap between the strip protrusion.

[0020] The strip groove can collect the lubricating oil stirred up by the gear in the clockwise and counterclockwise directions, and promote the lubricating oil to be smoothly guided through the strip protrusion. In addition, due to the gap between the groove wall of the strip groove and the strip protrusion, it is more favorable for the lubricating oil to flow into the lubrication inlet.

[0021] In some possible implementations, the other strip groove is arranged between the one strip groove and the other strip groove at one end facing the annular protrusion, wherein: the groove width of the other strip groove at one end facing the annular protrusion is smaller than the groove width of the other end of the other strip groove away from the annular protrusion. This is not only conducive to further gathering the lubricating oil at a position close to the lubricating inlet to promote the flow of the lubricating oil into the lubricating inlet, but also conducive to fully and reliably collecting the lubricating oil coming in the counterclockwise direction to promote the flow of the lubricating oil to the strip groove.

[0022] In some possible implementations, the annular protrusion includes another notch, and along the circumference of the annular protrusion, the width of the other notch is smaller than the width of the one notch, and along the counterclockwise direction, the central angle between the one notch and the other notch is greater than 180 degrees.

[0023] In some possible implementations, the reducer includes an input wheel, an intermediate wheel and an output wheel, the input wheel is used to drive the motor shaft of the drive motor, the intermediate wheel is used to drive the input wheel and the output wheel, and the output wheel is used to drive the wheels of the electric vehicle, and the inner walls of the two housings respectively include three bearing cavities, and the three bearing cavities of each housing are respectively used to accommodate and fix one of the bearings of the input wheel, the intermediate wheel and the output wheel, wherein:

[0024] The annular protrusion surrounds the bearing cavity of the input wheel, the lubricating oil passage is used to connect the bearing cavity of the input wheel, and the angle between any one of the strip protrusions and the line connecting the bearing cavity of the input wheel and the bearing cavity of the output wheel in the clockwise direction is greater than 90 degrees and less than 180 degrees; or,

[0025] The annular protrusion surrounds the bearing cavity of the output wheel, the lubricating oil channel is used to connect to the bearing cavity of the output wheel, and the angle of any one of the strip protrusions relative to the line connecting the bearing cavity of the output wheel and the bearing cavity of the input wheel in the counterclockwise direction is greater than 90 degrees and less than 180 degrees.

[0026] On the other hand, a power assembly is provided, which includes a reducer with bidirectional oil collection and lubrication in the shell as described above and a drive motor, wherein the motor shaft of the drive motor is used for transmission connection to the input shaft of the reducer, and the input shaft of the reducer is used for transmission connection to the input wheel of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of an exemplary reducer provided in an embodiment of the present disclosure;

[0028] Figure 2 A cross-sectional view of an exemplary reducer provided by an embodiment of the present disclosure at a first viewing angle;

[0029] Figure 3 A cross-sectional view of an exemplary reducer provided by an embodiment of the present disclosure at a second viewing angle;

[0030] Figure 4 A schematic diagram of the overall structure of an exemplary housing provided in an embodiment of the present disclosure;

[0031] Figure 5 A schematic diagram of a first partial structure of an exemplary housing provided in an embodiment of the present disclosure;

[0032] Figure 6 A schematic diagram of a second partial structure of an exemplary housing provided in an embodiment of the present disclosure;

[0033] Figure 7 A schematic diagram of the arrangement relationship of a housing, a gear and a bearing obtained from a first perspective provided in an embodiment of the present disclosure;

[0034] Figure 8 A schematic diagram of the arrangement relationship of a housing, a gear and a bearing obtained from a second viewing angle provided in an embodiment of the present disclosure;

[0035] Fig. 9 A schematic diagram of the overall structure of another exemplary shell provided in an embodiment of the present disclosure.

[0036] The reference numerals represent:

[0037] 101 / 102, housing;

[0038] 11, annular protrusion; 110, lubricating oil channel; 111, lubricating inlet; 112, lubricating outlet; 114 / 115, notch; 1141 / 1142, groove wall;

[0039] 12 / 13, strip-shaped protrusion; 121, one end of the strip-shaped protrusion 12; 122, the other end of the strip-shaped protrusion 12; 131, one end of the strip-shaped protrusion 13; 132, the other end of the strip-shaped protrusion 13;

[0040] 14 / 15, strip groove;

[0041] 16. Circular steps; 161 / 162 / 163. Notch;

[0042] 17. Slotting;

[0043] 201. Bearing; 202. Gear. DETAILED DESCRIPTION

[0044] In the description of the embodiments of the present disclosure, the terms "counterclockwise", "clockwise", "height", "length", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present disclosure and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present disclosure.

[0045] The power system of electric vehicles such as electric cars usually adopts a combination of a drive motor and a reducer, wherein the reducer is used to realize the transmission connection between the drive motor and the wheels in the electric car.

[0046] In the disclosed embodiment, the reducer includes a reducer housing and a gear assembly, an input shaft, an output shaft, and bearings assembled inside the reducer housing. The input wheel in the gear assembly is connected to the input shaft, and the input shaft is assembled in the reducer housing through two bearings located on both sides of the input wheel. The input shaft is also connected to the motor shaft of the drive motor. The output wheel in the gear assembly is connected to the output shaft, and the output shaft is assembled in the reducer housing through two bearings located on both sides of the output wheel. The output shaft is used to drive and connect the wheels.

[0047] As mentioned above, the input shaft and output shaft of the reducer are assembled in the reducer housing through bearings. During the operation of the reducer, the bearings need to be lubricated, and the rotation of the bearings will cause wear. In addition, the heat generated by the friction of the bearings cannot be removed in time, which may cause the bearings to overheat.

[0048] At present, the solutions for reducer bearing lubrication include passive lubrication and active lubrication. Among them, passive lubrication is also called splash lubrication, which stirs the lubricating oil inside the reducer housing through gear rotation, causing the lubricating oil to splash. The splashed lubricating oil flows to the bearing through the oil channel arranged on the inner wall of the reducer housing, thereby achieving lubrication and cooling of the bearing.

[0049] However, the current passive lubrication solutions for reducer bearings can usually only meet the passive lubrication of bearings in a single gear rotation direction, and cannot simultaneously meet the passive lubrication requirements of bearings under forward and reverse gear rotation conditions.

[0050] In view of the technical problems existing in the related art, the embodiment of the present disclosure provides a reducer with bidirectional oil collection lubrication of the housing, which is used to drive and connect the driving motor and wheels of an electric vehicle. Figure 1 As shown, the reducer includes two housings 101 and 102 arranged opposite to each other, and further combined with Figure 2 It can be seen that the inner walls of the two housings 101 and 102 are respectively used to fix two bearings 201 corresponding to the same gear 202 in the reducer.

[0051] Further integration Figure 3 and Figure 4 It can be seen that the inner wall of a housing 101, 102 includes: an annular protrusion 11 and two strip protrusions 12, 13, wherein the annular protrusion 11 is used to accommodate and fix a bearing 201 of a gear 202, and the annular protrusion 11 includes a lubricating oil passage 110, and the lubricating oil passage 110 is used to connect the inner circumference and the outer circumference of the annular protrusion 11. The length direction of at least one strip protrusion 12, 13 intersects or is parallel to the radial direction of a gear 202, and one strip protrusion 12 is arranged at a distance on one side of another strip protrusion 13 in the clockwise direction, and each strip protrusion 12, 13 includes one end 121, 131 of a lubricating inlet 111 facing the lubricating oil passage 110, and one end 121 of a strip protrusion 12 is spaced from the outer circumference of the annular protrusion 11. Among them, a strip protrusion 12 is used to collect the lubricating oil stirred up by a gear 202 in the counterclockwise direction and guide it to the lubricating inlet 111, and the gap between a strip protrusion 12 and another strip protrusion 13 is used to collect the lubricating oil stirred up by a gear 202 rotating in the clockwise direction and guide it to the lubricating inlet 111.

[0052] The shell bidirectional oil collection lubrication reducer provided by the embodiment of the present disclosure is improved by at least one of the shell 101 or the shell 102, and two strip protrusions 12, 13 and an annular protrusion 11 with a lubricating oil passage 110 are formed on the inner wall of the shell 101 or the shell 102, which can cooperate to form a bearing bidirectional passive lubrication structure. Specifically, by making the length direction of at least one strip protrusion 12, 13 intersect or be parallel to the radial direction of a gear 202, the strip protrusions 12, 13 can play the role of lubricating oil baffles and guide ribs. By making a strip protrusion 12 arranged at intervals on one side of another strip protrusion 13 in the clockwise direction, when the gear 202 rotates in the counterclockwise direction, the lubricating oil stirred up by the gear 202 flows along the inner wall of the shell 101, 102 in the counterclockwise direction and is blocked and collected by the strip protrusion 12, so that the strip protrusion 12 guides the lubricating oil stirred up by the gear 202 in the counterclockwise direction to the lubrication inlet 111. When the gear 202 rotates in the clockwise direction, the lubricating oil stirred up by the gear 202 flows in the clockwise direction along the inner wall of the housing 101, 102 and is blocked by the strip protrusion 12. At the same time, the strip protrusion 13 prevents the lubricating oil from falling freely due to gravity, so that the interval between the strip protrusion 12 and the strip protrusion 13 can collect the lubricating oil stirred up by the gear 202 in the clockwise direction and guide it to the lubricating inlet 111. By opening a lubricating oil passage 110 on the annular protrusion 11 that accommodates the bearing 201, the lubricating oil passage 110 is used to connect the inner circumference and the outer circumference of the annular protrusion 11. In this way, the lubricating oil introduced into the lubricating inlet 111 passes through the lubricating oil passage 110, thereby smoothly reaching the bearing 201, thereby achieving lubrication and cooling of the bearing 201. It can be seen that the reducer provided in the embodiment of the present disclosure, its housing 101, 102 has a bidirectional oil collection and lubrication function, which can not only take into account the passive lubrication requirements of the bearing of the gear 202 under forward and reverse conditions, but also has the advantage of simple structural arrangement.

[0053] In the embodiment of the present disclosure, one strip protrusion 12 is arranged at an interval on one side of another strip protrusion 13 in the clockwise direction, that is, the strip protrusion 13 is located on one side of the strip protrusion 12 in the counterclockwise direction. Then, for the lubricating oil flowing in the clockwise direction, after the lubricating oil enters the interval between the strip protrusion 12 and the strip protrusion 13, the strip protrusion 13 is located on one side of the lubricating oil in the gravity direction, so that when the lubricating oil has a tendency to fall freely due to gravity, the strip protrusion 13 can block the free-falling lubricating oil, ensuring that the lubricating oil is smoothly guided to the lubrication inlet 111 through the interval between one strip protrusion 12 and another strip protrusion 13.

[0054] In combination with the above-mentioned reducer, in some examples, such as the attached Figure 5As shown, the height of one strip-shaped protrusion 12 along the axial direction of one gear 202 is greater than the height of another strip-shaped protrusion 13 along the axial direction of one gear 202 .

[0055] The height of the strip protrusions 12 and 13 refers to the dimensions of the strip protrusions 12 and 13 along the axial direction of the gear 202 , which can also be understood as the dimensions of the strip protrusions 12 and 13 along the direction perpendicular to the inner walls of the housings 101 , 102 .

[0056] The embodiment of the present disclosure makes the height of one strip protrusion 12 greater than the height of the other strip protrusion 13, which has at least the following advantages: since one strip protrusion 12 needs to collect the lubricating oil stirred up by the gear 202 in both clockwise and counterclockwise directions, the strip protrusion 12 plays the role of a main oil guide rib, and by making the height of the strip protrusion 12 relatively large, it is conducive to fully collecting the lubricating oil stirred up by the gear 202. Since the other strip protrusion 13 needs to collect the lubricating oil falling due to gravity, the strip protrusion 13 plays the role of an auxiliary oil guide rib relative to the strip protrusion 12, so by making the height of the strip protrusion 13 relatively small, it can not only meet the requirement that the strip protrusion 13 can fully block the flowing lubricating oil falling due to gravity, but also help to further reduce the volume and weight of the strip protrusion 13, which is conducive to the lightweight design of the housing 101, 102.

[0057] Furthermore, combined with Figure 5 It can be seen that the height of one end 121, 131 of at least one of the two strip-shaped protrusions 12, 13 is greater than the height of the other end 122, 132. For example, Figure 5 It is illustrated that the height of one end 121 of one strip-shaped protrusion 12 is greater than the height of the other end 122 thereof, and the height of one end 131 of another strip-shaped protrusion 13 is greater than the height of the other end 132 thereof.

[0058] like Figure 5 As shown, the inner walls of the housings 101 and 102 are arranged to form an envelope structure, which surrounds at least part of the outer circumference of the annular protrusion 11 and can contain lubricating oil. Two strip protrusions 12 and 13 are formed on the inner wall of the envelope structure.

[0059] In some examples, the envelope structure of the housing 101, 102 can be an arc-shaped cavity, and the radial dimension of the envelope structure gradually increases from one end of the envelope structure close to the annular protrusion 11 to the other end of the envelope structure away from the annular protrusion 11, which allows the lubricating oil stirred by the gear 202 to flow in a swirling manner by relying on its inertia, so that the lubricating oil is more easily blocked by the strip protrusion 12.

[0060] Then, for the position where one end 121, 131 of each strip protrusion 12, 13 faces the lubrication inlet 111 of the lubrication oil passage 110, the radial dimension of the envelope structure is small, and the height of the lubrication oil stirred up is high, so the height of at least one of the one end 121 of the strip protrusion 12 and the one end 131 of the strip protrusion 13 can be designed to be high. Conversely, for the position where the other end 122, 132 of each strip protrusion 12, 13 faces away from the lubrication inlet 111 of the lubrication oil passage 110, the radial dimension of the envelope structure is large, and the height of the lubrication oil stirred up is low, so the height of at least one of the other end 122 of the strip protrusion 12 and the other end 132 of the strip protrusion 13 can be designed to be low (smaller than the height of the one end 121 of the strip protrusion 12 and the one end 131 of the strip protrusion 13, respectively). Such a configuration can not only ensure that the strip-shaped protrusions 12 and 13 can fully and reliably block the lubricating oil, but also help to reduce the volume and weight of the strip-shaped protrusions 12 and 13, and further facilitate the lightweight design of the housings 101 and 102.

[0061] On the basis that the height of the end regions of the strip protrusions 12 and 13 meets the above characteristics, the height of the non-end regions of the strip protrusions 12 and 13 can be designed with equal height or with non-equal height. For the non-equal height design, for example, the height of the non-end regions of the strip protrusions 12 and 13 can be changed gradually or in steps. For an example, see Figure 5 or Figure 6 , the height of the strip protrusion 12 can be gradually reduced from one end 121 to the other end 122 of the strip protrusion 12. Another example can be seen in Figure 5 or Figure 6 , from one end 131 of the strip-shaped protrusion 13 to the other end 132 thereof, the height of the strip-shaped protrusion 13 may gradually decrease.

[0062] The arrangement of the strip-shaped protrusions 12 and 13 in the height direction is described above, and the arrangement of the strip-shaped protrusions 12 and 13 in the length direction is described below by way of example.

[0063] In the disclosed embodiment, the length direction of at least one strip protrusion 12, 13 intersects or is parallel to the radial direction of a gear 202, and the two ends of the strip protrusion 12 along its length direction are one end 121 facing the lubrication inlet 111 of the lubrication oil passage 110 and the other end 122 away from the lubrication inlet 111. The two ends of the strip protrusion 13 along its length direction are one end 131 facing the lubrication inlet 111 of the lubrication oil passage 110 and the other end 132 away from the lubrication inlet 111.

[0064] Based on the above, it can be seen that one strip protrusion 12 plays the role of the main oil guide rib, and the other strip protrusion 13 plays the role of the auxiliary oil guide rib. On this basis, as shown in the attached Figure 6 As shown, the length of one strip protrusion 12 is greater than that of the other strip protrusion 13. With this arrangement, on the basis of ensuring the bidirectional oil collection effect of the strip protrusions 12 and 13, the length of the strip protrusion 13 is designed to be smaller, which is also conducive to the lightweight design of the shells 101 and 102.

[0065] Based on the above, it can be known that the strip protrusion 12 includes the other end 122 of the lubrication inlet 111 away from the lubrication oil passage 110, and the strip protrusion 13 includes the other end 132 of the lubrication inlet 111 away from the lubrication oil passage 110. In some examples, such as the attached Figure 6 As shown, the distance between the other end 122 of one strip-shaped protrusion 12 and the outer peripheral surface of the annular protrusion 11 can be made greater than the distance between the other end 132 of another strip-shaped protrusion 13 and the outer peripheral surface of the annular protrusion 11 .

[0066] That is to say, the other end 132 of the strip protrusion 13 does not extend to the outer periphery of the inner wall of the shell 101, 102, so that there is a gap between the other end 132 of the strip protrusion 13 and the outer periphery of the inner wall of the shell 101, 102 to allow lubricating oil to pass through, and the lubricating oil that passes through is then blocked by the strip protrusion 12 and flows along the strip protrusion 12.

[0067] Through the above arrangement, on the one hand, the length of the strip protrusion 12 is long enough to ensure that the strip protrusion 12 can fully and reliably block and guide the lubricating oil flowing along the inner wall of the housing 101, 102; on the other hand, the length of the strip protrusion 13 is small and there is a gap between it and the outer peripheral edge of the inner wall of the housing 101, 102, so that the lubricating oil stirred up by the gear 102 in the clockwise direction can be smoothly collected by the strip protrusion 12. Since the lubricating oil falls due to gravity, it occurs on the path where it is guided to the lubrication inlet 111 by the strip protrusion 12. At this time, although the strip protrusion 13 is arranged as described above along its length direction, the strip protrusion 13 can still effectively block the lubricating oil falling due to gravity; on the other hand, the length of the strip protrusion 13 is designed to be small, which is also conducive to the lightweight design of the housing 101, 102.

[0068] In some examples, the other end 122 of a strip-shaped protrusion 12 may be extended to the outer periphery of the inner wall of the housing 101 , 102 , thereby improving the collection effect of the strip-shaped protrusion 12 on lubricating oil.

[0069] In the shells 101 and 102 provided in the embodiments of the present disclosure, one end 121 of a strip-shaped protrusion 12 is spaced apart from the outer circumferential surface of the annular protrusion 11, and one end 131 of another strip-shaped protrusion 13 may be spaced apart from the outer circumferential surface of the annular protrusion 11, or may extend to connect with the outer circumferential surface of the annular protrusion 11.

[0070] The strip protrusions 12 and the strip protrusions 13 can be arranged in parallel and spaced apart (i.e., the spacing between the two is equal), or can be arranged in non-parallel and non-intersecting spacing (i.e., the spacing between the two is variable). For example, the strip protrusions 12 and the strip protrusions 13 are arranged in non-parallel and non-intersecting spacing, as shown in the attached Figure 6 As shown, the distance W1 between the other end 132 of another strip-shaped protrusion 13 and one strip-shaped protrusion 12 is greater than the distance W2 between the one end 131 of another strip-shaped protrusion 13 and one strip-shaped protrusion 12 .

[0071] Furthermore, the change in the distance between another strip protrusion 13 and one strip protrusion 12 along the direction from the other end 132 to the one end 131 of the strip protrusion 13 may be a gradual change or a step change. For example, Figure 6 It is illustrated that the distance between another strip-shaped protrusion 13 and one strip-shaped protrusion 12 gradually decreases.

[0072] By designing the spacing W1 between the other end 132 of the strip protrusion 13 and the strip protrusion 12 to be larger, the lubricating oil flowing in the clockwise direction is allowed to fully and reliably enter the interval area between the strip protrusions 12 and 13. By designing the spacing W2 between the one end 131 of the strip protrusion 13 and the strip protrusion 12 to be smaller, the lubricating oil located at the interval between the strip protrusions 12 and 13 is facilitated to gather, so that the lubricating oil is gathered at the one end 121 of the strip protrusion 12, and then smoothly enters the lubricating inlet 111 of the lubricating oil channel 110.

[0073] As attached Figure 4 As shown, the outer circumference of the annular protrusion 11 includes a lubrication inlet 111 of the lubrication oil passage 110, the inner circumference of the annular protrusion 11 includes a lubrication outlet 112 of the lubrication oil passage 110, and the length direction of a strip protrusion 12 passes through the lubrication inlet 111. For further example, the length direction of a strip protrusion 12 passes through the lubrication inlet 111 in the middle.

[0074] Through the above arrangement, it can be ensured that the lubricating oil guided through one side of the strip protrusion 12 in the clockwise direction and the other side in the counterclockwise direction can be smoothly guided to the lubrication inlet 111, ensuring good adaptability to both the forward and reverse working conditions of the gear 202.

[0075] The above is an exemplary description of the arrangement of the strip-shaped protrusions 12 and 13 . The following is a further exemplary description of the arrangement of the annular protrusion 11 in the housings 101 and 102 and its arrangement relationship with the strip-shaped protrusion 12 .

[0076] In one embodiment, the annular protrusion 11 includes a notch 114, and the notch 114 is used to form a lubricating oil passage 110. The notch 114 includes a groove wall 1141 and another groove wall 1142 arranged in a counterclockwise direction. One groove wall 1141 is arranged in a clockwise direction on one side of a strip-shaped protrusion 12. Another groove wall 1142 is arranged in a counterclockwise direction on the other side of a strip-shaped protrusion 12).

[0077] As attached Figure 5 As shown, the annular protrusion 11 includes a notch 114, and the notch 114 is used to form a lubricating oil passage 110. Figure 6 A notch 114 includes a groove wall 1141 and another groove wall 1142 arranged in a counterclockwise direction. Among them, one groove wall 1141 is arranged in a clockwise direction on one side of a strip protrusion 12, and the other groove wall 1142 is arranged in a counterclockwise direction on the other side of a strip protrusion 12.

[0078] The reducer and power assembly provided by the embodiment of the present disclosure form the lubricating oil passage 110 by providing the notch 114 on the annular protrusion 11, so that the lubricating oil passage 110 is a semi-open cavity structure, which has the advantage of making the molding and preparation process of the lubricating oil passage 110 simpler and easier to operate. By arranging a groove wall 1141 of the notch 114 at intervals on one side of a strip-shaped protrusion 12 along the clockwise direction, the lubricating oil stirred up by the gear 202 in the counterclockwise direction is guided by the strip-shaped protrusion 12, and it is easier to enter the lubricating oil passage 110 formed by the notch 114 through the interval between the strip-shaped protrusion 12 and a groove wall 1141 of the notch 114. By arranging another groove wall 1142 at intervals on the other side of a strip protrusion 12 in the counterclockwise direction, the lubricating oil stirred up by the gear 202 in the clockwise direction is guided by the strip protrusion 12 and more easily enters the lubricating oil channel 110 formed by the notch 114 through the gap between the strip protrusion 12 and the other groove wall 1142 of the notch 114.

[0079] In one embodiment, as shown in the attached Figure 5 As shown, the annular protrusion 11 further includes another notch 115. Along the circumference of the annular protrusion 11, the width of the other notch 115 is smaller than the width of the one notch 114. The central angle between the one notch 114 and the other notch 115 in the counterclockwise direction is greater than 180 degrees.

[0080] The annular protrusion 11 further includes another notch 115. Along the circumference of the annular protrusion 11, the width of the other notch 115 is smaller than the width of the one notch 114. Along the counterclockwise direction, the central angle between the one notch 114 and the other notch 115 is greater than 180 degrees.

[0081] The reducer and power assembly provided by the embodiment of the present disclosure can improve the bearing lubrication effect by providing another notch 115 on the annular protrusion 11 for the lubricating oil in the bearing cavity to flow out. In addition, the central angle between one notch 114 and another notch 115 in the counterclockwise direction is greater than 180 degrees, so that the lubricating oil can flow in and out of the bearing cavity along with the rotating bearing, thereby improving the coverage of the lubricating oil. The width of the other notch 115 is smaller than the width of the one notch 114, and part of the lubricating oil can flow out through the through hole of the bearing cavity, thereby improving the lubrication effect.

[0082] In some examples, the extension line of the strip-shaped protrusion 12 along its length direction passes through the notch 114 in the center, so that the spacing between one groove wall 1141 and the other groove wall 1142 and the strip-shaped protrusion 12 can be the same.

[0083] In some examples, the spacing between a groove wall 1141 of the notch 114 and a strip protrusion 12 is less than or equal to the spacing between one end 131 of another strip protrusion 13 and one end 121 of a strip protrusion 12. For example, this can make one end 131 of another strip protrusion 13 be located on the outside of another groove wall 1142 of the notch 114, and one end 131 of the strip protrusion 13 does not extend into the notch 114. This not only ensures that there is sufficient spacing space between the other groove wall 1142 of the notch 114 and a strip protrusion 12 to guide the lubricating oil, but also, the strip protrusion 13 can reliably block the lubricating oil that may overflow from the lubrication inlet 111 due to gravity.

[0084] In some examples, the distance between one groove wall 1141 and one strip protrusion 12 is greater than the distance between one end 131 of another strip protrusion 13 and the outer peripheral surface of the annular protrusion 11. With this arrangement, one end 131 of another strip protrusion 13 is as close to the outer peripheral surface of the annular protrusion 11 as possible, thereby improving the blocking effect of the strip protrusion 13 on the lubricating oil falling due to gravity.

[0085] In combination with any of the above-mentioned reducers, in some implementations, such as the attached Figure 5 and attached Figure 6 As shown, the inner wall of a shell 101, 102 includes two strip grooves 14, 15, wherein one strip groove 14 is arranged on one side of a strip protrusion 12 along the clockwise direction, and one strip groove 14 is used to connect the gap between a groove wall 1141 and a strip protrusion 12; the other strip groove 15 is arranged on the other side of a strip protrusion 12 along the counterclockwise direction, and the other strip groove 15 is used to connect the gap between another groove wall 1142 and a strip protrusion 12.

[0086] Among them, the length directions of the two strip grooves 14 and 15 intersect or are parallel to the radial direction of a gear 202. By making the strip groove 14 located on one side of a strip protrusion 12 in the clockwise direction, the strip groove 14 can collect the lubricating oil stirred up by the gear 202 in the counterclockwise direction, and promote the lubricating oil to be smoothly diverted through the strip protrusion 12. In addition, since the strip groove 14 connects the interval between a groove wall 1141 of the notch 14 and a strip protrusion 12, it is more favorable for the lubricating oil to flow into the lubricating inlet 111. By making the strip groove 15 located on one side of a strip protrusion 12 in the counterclockwise direction, the strip groove 15 can collect the lubricating oil stirred up by the gear 202 in the clockwise direction, and promote the lubricating oil to be smoothly diverted through the strip protrusion 12. In addition, since the strip groove 15 connects the interval between another groove wall 1142 of the notch 14 and a strip protrusion 12, it is more favorable for the lubricating oil to flow into the lubricating inlet 111.

[0087] As attached Figure 6 As shown, another strip groove 15 is arranged between a strip protrusion 12 and another strip protrusion 13 at one end facing the annular protrusion 11, wherein the groove width of the other strip groove 15 at one end facing the annular protrusion 11 is smaller than the groove width of the other end of the other strip groove 15 away from the annular protrusion 11.

[0088] Through the above arrangement, on the one hand, the width of the groove at one end of the strip groove 15 facing the annular protrusion 11 is narrower, which is conducive to further gathering the lubricating oil at a position close to the lubricating inlet 111, so as to promote the flow of the lubricating oil into the lubricating inlet 111. On the other hand, the groove at the other end of the strip groove 15 away from the annular protrusion 11 is wider, which is conducive to fully and reliably collecting the lubricating oil coming in the counterclockwise direction, and promoting the flow of the lubricating oil to the strip protrusion 12.

[0089] For the groove width of the strip groove 14, the groove width of one end of the strip groove 14 facing the annular protrusion 11 can also be made smaller than the groove width of the other end of the strip groove 14 away from the annular protrusion 11, which can also achieve a technical effect equivalent to the groove width arrangement of the above-mentioned strip groove 15.

[0090] In combination with any of the above-mentioned reducers, the embodiment of the present disclosure further describes the inner wall structure of the housing 101 and 102. Figure 5 and Figure 6It can be seen that the inner wall of the housing 101, 102 includes a cylindrical cavity for accommodating the bearing 201, which is also the bearing cavity. An annular protrusion 11 and an annular step 16 are formed at both ends of the cylindrical cavity, respectively, and the annular step 16 is used to support an end face of the bearing 201. A slot 17 is provided on the inner side wall of the cylindrical cavity, one end of the slot 17 is connected to the lubrication outlet 112, and the annular step 16 has at least two gaps spaced apart in the circumferential direction, one of which is connected to the other end of the slot 17. In this way, after the lubricating oil enters the lubricating oil passage 110, it passes through the lubrication outlet 112, the slot 17 and a gap 161 in sequence, and finally enters the bearing 201 to lubricate and cool it.

[0091] In some examples, the annular step 16 has another notch 162 and another notch 163, and the notch 162 and the notch 163 can play a certain role in oil leakage. Further, a through-hole structure can be set on the inner wall of the cylindrical cavity, and another notch 162 can be connected to a through-hole structure set on the inner wall of the cylindrical cavity. In this way, the notch 162 can be connected to the outside based on the through-hole structure, which is conducive to setting an active lubrication structure in the reducer. When used, the lubricating oil sprayed by the oil nozzle in the active lubrication structure enters the notch 162 through the through-hole structure to actively cool and lubricate the bearing 201.

[0092] When the notch 162 and the notch 163 are arranged relatively spaced apart, the notch 162 and the notch 163 can be used as assembly operation holes to assist the installation of the bearing 201 .

[0093] According to any of the above-mentioned reducers, combined with Figure 7 and Figure 8 The distance between one end of the gear 202 facing the inner wall of the shell 101, 102 and the corresponding end of a strip protrusion 12 is defined as H. The distance H is along the axial direction of the gear 202, so that the value range of H can be 3mm-5mm, which includes but is not limited to: 3mm-3.5mm, 3mm-4mm, 3mm-4.5mm, 3.5mm-4mm, 3.5mm-4.5mm, 3.5mm-5mm, 4mm-4.5mm, 4mm-5mm, etc. By controlling the distance between the gear 202 and the strip protrusion 12 to 3mm-5mm, the strip protrusion 12 can achieve better oil blocking and oil collecting effects.

[0094] In addition, the present disclosure uses Figure 3-Figure 8 The example shows that a passive bearing lubrication structure is provided on the inner wall of the housing 101. Fig. 9 The passive lubrication structure of the bearing provided on the inner wall of the housing 102 is exemplified.

[0095] Depending on the number of transmission stages, the reducer provided in the embodiment of the present disclosure may be a single-stage reducer or a multi-stage reducer, including but not limited to a two-stage reducer, a three-stage reducer, etc.

[0096] In some examples, the reducer provided by the embodiments of the present disclosure is a multi-stage reducer, which includes an input wheel, an intermediate wheel and an output wheel, the input wheel is used to drive the motor shaft connected to the drive motor, the intermediate wheel is used to drive the input wheel and the output wheel, and the output wheel is used to drive the wheels of the electric vehicle. The inner walls of the two housings 101 and 102 respectively include three bearing cavities, and the three bearing cavities of each housing 101 and 102 are respectively used to accommodate and fix a bearing of the input wheel, the intermediate wheel and the output wheel.

[0097] In one embodiment, the bearing passive lubrication structure composed of the annular protrusion 11, the strip protrusions 12, 13, etc. is formed on the inner wall of the two housings 101, 102 corresponding to the output wheel, and the lubricating oil stirred up by the output wheel in the clockwise and counterclockwise directions is used to achieve bidirectional passive lubrication of the two bearings corresponding to the output wheel. For this solution, see Figure 4 The annular protrusion 11 surrounds the bearing cavity of the output wheel, and the lubricating oil channel 110 is used to connect the bearing cavity of the output wheel. The angle between any strip protrusion 12 and 13 along the counterclockwise direction and the connecting line L between the bearing cavity of the output wheel and the bearing cavity of the input wheel is greater than 90 degrees and less than 180 degrees. The range of the angle can also be 100 degrees-170 degrees, and further can be 110 degrees-160 degrees, 120 degrees-150 degrees, etc.

[0098] In the application scenario of the reducer, any of the strip protrusions 12 and 13 is located above the annular protrusion 11 and is arranged obliquely relative to the vertical direction. On the one hand, this is conducive to the strip protrusions 12 and 13 to collect and guide the lubricating oil inside the housing 101 and 102 in both directions. On the other hand, when the input wheel is in a low-speed rotation condition, the oblique arrangement of the strip protrusions 12 and 13 allows the lubricating oil to be more easily stirred to the other end 122 and 131 of the strip protrusions 12 and 13 away from the annular protrusion 11, thereby enhancing the adaptability of the bearing passive lubrication structure involved in the embodiment of the present disclosure to the low-speed rotation condition of the gear.

[0099] In another embodiment, the passive lubrication structure of the bearing formed by the annular protrusion 11, the strip protrusions 12, 13, etc. is formed on the inner wall of the two housings 101, 102 corresponding to the input wheel, and the lubricating oil stirred up by the input wheel in the clockwise and counterclockwise directions is used to realize the two bearings corresponding to the input wheel. For this scheme, the annular protrusion 11 surrounds the bearing cavity of the input wheel, and the lubricating oil channel 110 is used to connect the bearing cavity of the input wheel. The angle between the connecting line between the bearing cavity of the input wheel and the bearing cavity of the output wheel in the clockwise direction of any strip protrusion 12, 13 is greater than 90 degrees and less than 180 degrees (not shown in the figure). Among them, the range of the angle can also be 100 degrees-170 degrees, and further can be 110 degrees-160 degrees, 120 degrees-150 degrees, etc.

[0100] Similarly, this not only facilitates the strip protrusions 12 and 13 to collect and guide the lubricating oil inside the housings 101 and 102 in both directions, but also can enhance the adaptability of the passive lubrication structure of the bearing involved in the embodiment of the present disclosure to the low-speed rotation conditions of the gears.

[0101] In the embodiments of the present disclosure, one implementation scheme and another implementation scheme mentioned above may exist alone or simultaneously.

[0102] The following is a further exemplary description of the passive lubrication process of the bearings in the reducer in conjunction with an implementation scheme in which the passive lubrication structure of the bearings is formed on the inner walls of the two housings 101 and 102 corresponding to the output wheels.

[0103] As attached Figure 4 As shown in FIG. 1 , when the gear 202 rotates in the counterclockwise direction, the lubricating oil can be stirred in the counterclockwise direction, thereby driving the lubricating oil to rotate in the counterclockwise direction. Figure 4 The oil flows along the path A shown and is thrown to one side of a strip protrusion 12 in the clockwise direction. The lubricating oil flows under the action of gravity and is guided by the strip protrusion 12 to the lubrication inlet 111, then enters the lubricating oil channel 110, and finally reaches the bearing 201 to lubricate and cool it.

[0104] As attached Figure 4 As shown, when the gear 202 rotates in the clockwise direction, the lubricating oil can be stirred in the clockwise direction, thereby driving the lubricating oil liquid Figure 4 The oil flows along the path B shown and is thrown to the other side of a strip protrusion 12 in the clockwise direction. The lubricating oil has a tendency to fall due to the influence of gravity. The lubricating oil falling due to gravity is blocked by the cooperation of another strip protrusion 13. The lubricating oil flows to the lubrication inlet 111 through the guidance of the interval between the strip protrusions 12 and 13, and then enters the lubricating oil channel 110, and finally reaches the bearing 201 to lubricate and cool it.

[0105] It can be seen that the reducer provided by the embodiment of the present disclosure takes into account the passive lubrication requirements of the bearings under the forward and reverse working conditions of the drive motor, and makes up for the unreliable risk of the active lubrication solution at low temperatures. In addition, the two-way oil collection lubrication structure provided on the housings 101 and 102 of the reducer is relatively simple, and the two-way oil collection lubrication structure can be integrally formed on the housing, which is conducive to reducing its cost and facilitating large-scale industrial production.

[0106] On the other hand, the embodiment of the present disclosure also provides a power assembly, which includes any one of the above-mentioned reducers with bidirectional oil collection and lubrication in the shell and a drive motor, the motor shaft of the drive motor is used for transmission connection to the input shaft of the reducer, and the input shaft of the reducer is used for transmission connection to the input wheel of the reducer.

[0107] The powertrain provided in the embodiment of the present disclosure has all the advantages of the reducer with bidirectional oil collection lubrication of the housing provided in the embodiment of the present disclosure. In some examples, the powertrain can be applied to electric vehicles, for example, it can be a three-in-one electric drive powertrain or a multi-in-one electric drive powertrain for electric vehicles, suitable for front and rear drives of electric vehicles.

[0108] The above description is only for the purpose of facilitating those skilled in the art to understand the technical solution of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A reducer with bidirectional oil collection lubrication of the housing, characterized in that: The reducer is used for transmission connection between a driving motor and a wheel of an electric vehicle, and comprises two housings (101, 102) arranged opposite to each other, the inner walls of the two housings (101, 102) are respectively used for fixing two bearings (201) corresponding to a same gear (202) in the reducer, and the inner wall of one housing (101, 102) comprises: an annular protrusion (11), the annular protrusion (11) being used to accommodate and fix a bearing (201) of a gear (202), the annular protrusion (11) comprising a lubricating oil passage (110), the lubricating oil passage (110) being used to connect the inner peripheral surface and the outer peripheral surface of the annular protrusion (11); Two strip-shaped protrusions (12, 13), the length direction of at least one of the strip-shaped protrusions (12, 13) intersecting or parallel to the radial direction of the one gear (202), one of the strip-shaped protrusions (12) being arranged at intervals on one side of the other strip-shaped protrusion (13) along the clockwise direction, each of the strip-shaped protrusions (12, 13) comprising an end (121, 131) facing the lubrication inlet (111) of the lubrication oil passage (110), and the end (121) of the one strip-shaped protrusion (12) being spaced apart from the outer peripheral surface of the annular protrusion (11); The one strip-shaped protrusion (12) is used to collect the lubricating oil stirred up by the one gear (202) in the counterclockwise direction and guide it to the lubricating inlet (111), and the interval between the one strip-shaped protrusion (12) and the other strip-shaped protrusion (13) is used to collect the lubricating oil stirred up by the one gear (202) in the clockwise direction and guide it to the lubricating inlet (111).

2. The reducer with bidirectional oil collection lubrication of the housing according to claim 1, characterized in that: The height of the one strip-shaped protrusion (12) along the axial direction of the one gear (202) is greater than the height of the other strip-shaped protrusion (13) along the axial direction of the one gear (202).

3. The reducer with bidirectional oil collection lubrication of the housing according to claim 1, characterized in that: The length of the one strip-shaped protrusion (12) is greater than the length of the other strip-shaped protrusion (13).

4. The reducer with bidirectional oil collection lubrication of the housing according to claim 1, characterized in that: Each of the strip-shaped protrusions (12, 13) further comprises another end (122, 132) of the lubrication inlet (111) facing away from the lubrication oil passage (110), and the distance between the other end (122) of one strip-shaped protrusion (12) and the outer peripheral surface of the annular protrusion (11) is greater than the distance between the other end (132) of the other strip-shaped protrusion (13) and the outer peripheral surface of the annular protrusion (11).

5. The reducer with bidirectional oil collection lubrication of the housing according to claim 4, characterized in that: The height of the one end (121, 131) of at least one of the two strip-shaped protrusions (12, 13) is greater than the height of the other end (122, 132).

6. The reducer with bidirectional oil collection lubrication of the housing according to claim 4, characterized in that: The distance between the other end (132) of the other strip-shaped protrusion (13) and the one strip-shaped protrusion (12) is greater than the distance between the one end (131) of the other strip-shaped protrusion (13) and the one strip-shaped protrusion (12).

7. The reducer with bidirectional oil collection lubrication of the housing according to claim 1, characterized in that: The outer peripheral surface of the annular protrusion (11) includes the lubrication inlet (111) of the lubrication oil passage (110), the inner peripheral surface of the annular protrusion (11) includes the lubrication outlet (112) of the lubrication oil passage (110), and the length direction of the strip-shaped protrusion (12) passes through the lubrication inlet (111).

8. The reducer with bidirectional oil collection lubrication of the housing according to claim 1, characterized in that: The annular protrusion (11) comprises a notch (114), the notch (114) is used to form the lubricating oil passage (110), the notch (114) comprises a groove wall (1141) and another groove wall (1142) arranged in a counterclockwise direction at intervals, wherein: The groove walls (1141) are arranged at intervals on one side of the strip-shaped protrusion (12) along the clockwise direction; The other groove wall (1142) is arranged at intervals on the other side of the one strip-shaped protrusion (12) along the counterclockwise direction.

9. The reducer with bidirectional oil collection lubrication of the housing according to claim 8, characterized in that: The distance between the one groove wall (1141) and the one strip-shaped protrusion (12) is less than or equal to the distance between one end (131) of the other strip-shaped protrusion (13) and the one end (121) of the one strip-shaped protrusion (12).

10. The reducer with bidirectional oil collection lubrication of the housing according to claim 8, characterized in that: The distance between the one groove wall (1141) and the one strip-shaped protrusion (12) is greater than the distance between one end (131) of the other strip-shaped protrusion (13) and the outer peripheral surface of the annular protrusion (11).

11. The reducer with bidirectional oil collection lubrication of the housing according to claim 8, characterized in that: The inner wall of one of the housings (101, 102) comprises two strip-shaped grooves (14, 15), wherein: One of the strip-shaped grooves (14) is arranged on one side of the one of the strip-shaped protrusions (12) in the clockwise direction, and the one of the strip-shaped grooves (14) is used to connect the interval between the one of the groove walls (1141) and the one of the strip-shaped protrusions (12); Another strip-shaped groove (15) is arranged on the other side of the one strip-shaped protrusion (12) in the counterclockwise direction, and the other strip-shaped groove (15) is used to connect the gap between the other groove wall (1142) and the one strip-shaped protrusion (12).

12. The reducer with bidirectional oil collection lubrication of the housing according to claim 11, characterized in that: The other strip-shaped groove (15) is arranged between the one strip-shaped protrusion (12) and the other strip-shaped protrusion (13) toward one end of the annular protrusion (11), wherein: The groove width of one end of the other strip-shaped groove (15) facing the annular protrusion (11) is smaller than the groove width of the other end of the other strip-shaped groove (15) facing away from the annular protrusion (11).

13. The reducer with bidirectional oil collection lubrication of the housing according to claim 8, characterized in that: The annular protrusion (11) comprises another notch (115); along the circumference of the annular protrusion (11), the width of the other notch (115) is smaller than the width of the one notch (114); and along the counterclockwise direction, the central angle between the one notch (114) and the other notch (115) is greater than 180 degrees.

14. The reducer with bidirectional oil collection lubrication of the housing according to any one of claims 1 to 13, characterized in that: The reducer comprises an input wheel, an intermediate wheel and an output wheel, the input wheel is used for drivingly connecting the motor shaft of the driving motor, the intermediate wheel is used for drivingly connecting the input wheel and the output wheel, and the output wheel is used for drivingly connecting the wheel of the electric vehicle, the inner walls of the two housings (101, 102) respectively comprise three bearing cavities, and the three bearing cavities of each housing (101, 102) are respectively used to accommodate and fix one of the bearings of the input wheel, the intermediate wheel and the output wheel, wherein: The annular protrusion (11) surrounds the bearing cavity of the input wheel, the lubricating oil passage (110) is used to connect to the bearing cavity of the input wheel, and the angle between any one of the strip protrusions (12, 13) and the line connecting the bearing cavity of the input wheel and the bearing cavity of the output wheel in the clockwise direction is greater than 90 degrees and less than 180 degrees; or, The annular protrusion (11) surrounds the bearing cavity of the output wheel, the lubricating oil passage (110) is used to connect the bearing cavity of the output wheel, and the angle between any one of the strip protrusions (12, 13) and the line connecting the bearing cavity of the output wheel and the bearing cavity of the input wheel in the counterclockwise direction is greater than 90 degrees and less than 180 degrees.

15. A powertrain, characterized in that: The power assembly includes a reducer with bidirectional oil collection lubrication in the shell as described in any one of claims 1 to 14 and a drive motor, wherein the motor shaft of the drive motor is used for transmission connection to the input shaft of the reducer, and the input shaft of the reducer is used for transmission connection to the input wheel of the reducer.

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