Speed reducer and new energy vehicle

Abstract

The utility model belongs to the technical field of new energy vehicles, and particularly relates to a speed reducer and a new energy vehicle. The speed reducer comprises a speed reducer shell, and a first bearing mounting cavity, a second bearing mounting cavity and a third bearing mounting cavity are formed in the speed reducer shell. A liquid flow channel is formed in one end of the speed reducer shell and divided into a first liquid flow channel, a second liquid flow channel, a third liquid flow channel, a fourth liquid flow channel, a fifth liquid flow channel and a sixth liquid flow channel. The first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel and the sixth liquid flow channel are communicated in sequence; the speed reducer shell is further provided with a liquid inlet end communicating with the first liquid flow channel and a liquid outlet end communicating with the sixth liquid flow channel. According to the utility model, the cost can be reduced while effective heat dissipation is carried out on the speed reducer.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, in particular to a speed reducer and a new energy vehicle. Background Art

[0002] Due to the long-term heavy load requirement and harsh operating environment of new energy engineering vehicles, it is difficult to dissipate heat from the drive system of new energy engineering vehicles. Currently, the speed reducer of engineering vehicles uses an oil-cooled exchanger to transfer heat and dissipate heat. The heat generated by the speed reducer of new energy vehicles is transferred to the oil circuit system. The oil becomes thinner at high temperatures and is then pumped to the radiator. In the radiator, the oil exchanges heat with the outside air through a series of pipes and fins and is then cooled down and recycled. However, the aforementioned method requires an additional oil-cooled exchanger to be set for the speed reducer, so the cost is relatively high. Summary of the Utility Model

[0003] In view of this, the embodiments of the utility model provide a speed reducer and a new energy vehicle, which are used to solve the technical problem of high cost of the cooling method of the speed reducer in the prior art.

[0004] The technical solution adopted by the utility model is as follows:

[0005] In the first aspect, the utility model provides a speed reducer, including a speed reducer housing, and a first bearing installation cavity, a second bearing installation cavity and a third bearing installation cavity are arranged on the speed reducer housing;

[0006] One end of the speed reducer housing is provided with a liquid flow channel, and the liquid flow channel is divided into a first liquid flow channel, a second liquid flow channel, a third liquid flow channel, a fourth liquid flow channel, a fifth liquid flow channel and a sixth liquid flow channel;

[0007] The first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel and the sixth liquid flow channel are communicated in sequence, wherein the second liquid flow channel is located at the back of the position where the first bearing installation cavity is located, the fourth liquid flow channel is located at the back of the position where the second bearing installation cavity is located, and the sixth liquid flow channel is located at the back of the position where the third bearing installation cavity is located;

[0008] A liquid inlet end communicated with the first liquid flow channel and a liquid outlet end communicated with the sixth liquid flow channel are further arranged on the speed reducer housing.

[0009] Preferably, an output end bearing installation cavity is arranged on the speed reducer housing, and the first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel and the sixth liquid flow channel are arranged around the output end bearing installation cavity in sequence. The first liquid flow channel is located at the lower part of the first housing, and the sixth liquid flow channel is located at the upper part of the first housing.

[0010] Preferably, the first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel, and the sixth liquid flow channel are partitioned into a plurality of cavities.

[0011] Preferably, the second liquid flow channel includes a plurality of fan-shaped cavities surrounded by a peripheral wall and rib plates. The plurality of fan-shaped cavities are arranged in sequence in the circumferential direction of the second liquid flow channel, and the liquid passes through the plurality of fan-shaped cavities in sequence according to the arrangement order of the plurality of fan-shaped cavities.

[0012] Preferably, the plurality of fan-shaped cavities include a first fan-shaped cavity, a second fan-shaped cavity, a third fan-shaped cavity, and a fourth fan-shaped cavity. The liquid flows through the first fan-shaped cavity, the second fan-shaped cavity, the third fan-shaped cavity, and the fourth fan-shaped cavity in sequence. The first fan-shaped cavity is communicated with the first liquid flow channel, the second fan-shaped cavity is communicated with the first fan-shaped cavity, the third fan-shaped cavity is communicated with the second fan-shaped cavity, and the fourth fan-shaped cavity is communicated with the third fan-shaped cavity.

[0013] Preferably, the first liquid flow channel includes a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity, and a sixth cavity. The first cavity, the second cavity, and the third cavity are located on a side of the first liquid flow channel away from the output end bearing mounting cavity. The fourth cavity, the fifth cavity, and the sixth cavity are located on a side of the first liquid flow channel close to the output end bearing mounting cavity. The sixth cavity is communicated with the second liquid flow channel;

[0014] The liquid outlet of the first cavity is communicated with the second cavity, the liquid outlet of the second cavity is communicated with the third cavity, the liquid outlet of the third cavity is communicated with the fourth cavity, one liquid outlet of the fourth cavity is communicated with the fifth cavity, and the other liquid outlet is communicated with the sixth cavity.

[0015] Preferably, the third liquid flow channel includes a seventh cavity, an eighth cavity, a ninth cavity, a tenth cavity, an eleventh cavity, a twelfth cavity, a thirteenth cavity, and a fourteenth cavity;

[0016] The seventh cavity, the eighth cavity, the thirteenth cavity, and the fourteenth cavity are located on a side of the third liquid flow channel close to the output end bearing mounting cavity. The ninth cavity, the tenth cavity, the eleventh cavity, and the twelfth cavity are located on a side of the third liquid flow channel away from the output end bearing mounting cavity. The fourteenth cavity is communicated with the fourth liquid flow channel;

[0017] The liquid inlet of the seventh cavity is communicated with the second liquid flow channel, the liquid outlet of the seventh cavity is communicated with the eighth cavity, the liquid outlet of the eighth cavity is communicated with the ninth cavity, the liquid outlet of the ninth cavity is communicated with the tenth cavity, the liquid outlet of the tenth cavity is communicated with the eleventh cavity, the first liquid outlet of the eleventh cavity is communicated with the twelfth cavity, the second liquid outlet of the eleventh cavity is communicated with the thirteenth cavity, the liquid outlet of the thirteenth cavity is communicated with the fourteenth cavity, the liquid outlet of the twelfth cavity is communicated with the thirteenth cavity, and the liquid outlet of the thirteenth cavity is communicated with the fourteenth cavity.

[0018] Preferably, the fifth liquid flow channel includes a fifteenth cavity, a sixteenth cavity, a seventeenth cavity, an eighteenth cavity, a nineteenth cavity, a twentieth cavity, a twenty-first cavity and a twenty-second cavity;

[0019] The fifteenth cavity, the sixteenth cavity, the twenty-first cavity and the twenty-second cavity are located on one side of the fifth liquid flow channel close to the output end bearing installation cavity, the seventeenth cavity, the eighteenth cavity, the nineteenth cavity and the twentieth cavity are located on the side of the fifth liquid flow channel far from the output end bearing installation cavity, and the twenty-second cavity is communicated with the sixth liquid flow channel;

[0020] The liquid inlet of the fifteenth cavity is communicated with the fourth liquid flow channel, the liquid outlet of the fifteenth cavity is communicated with the sixteenth cavity, the liquid outlet of the sixteenth cavity is communicated with the seventeenth cavity, and the liquid outlet of the seventeenth cavity is communicated with the eighteenth cavity;

[0021] The liquid outlet of the eighteenth cavity is communicated with the nineteenth cavity, the first liquid outlet of the nineteenth cavity is communicated with the twenty-first cavity, the second liquid outlet of the nineteenth cavity is communicated with the twentieth cavity, the liquid outlet of the twentieth cavity is communicated with the twenty-first cavity, and the liquid outlet of the twenty-first cavity is communicated with the twenty-second cavity.

[0022] Preferably, the outer edges of the first liquid flow channel and the third liquid flow channel form a semi-surrounding structure, at least a part of the second liquid flow channel is in the semi-surrounding structure formed by the first liquid flow channel and the third liquid flow channel and / or the outer edges of the third liquid flow channel and the fifth liquid flow channel form a semi-surrounding structure, at least a part of the fourth liquid flow channel is in the semi-surrounding structure formed by the third liquid flow channel and the fifth liquid flow channel, a buffer baffle is arranged in the liquid flow channel, and a gap is left between the buffer baffle and the bottom wall of the liquid flow channel close to the inner cavity of the reducer housing.

[0023] In a second aspect, the present utility model provides a new energy vehicle, including the reducer described in the first aspect.

[0024] Beneficial effects: For the reducer and new energy vehicle of the present utility model, a liquid flow channel is provided in the reducer housing, and the liquid flow channel is divided into at least six liquid flow channels. The liquid can take away the heat generated by the reducer during the process of flowing through each liquid flow channel in sequence, so as to effectively dissipate the heat of the reducer in the case of reducing or completely removing the oil cooler, and thus the cost is lower. Since the present utility model adopts the structure of flow channel separation and sequential arrangement of flow channels, the liquid can flow through the areas corresponding to each liquid flow channel on the back of the reducer housing in sequence according to the set path, and a part of the liquid can be buffered during the flow through each liquid flow channel, so that the liquid can flow to each area of each liquid flow channel, thereby significantly increasing the contact between the liquid and the first housing. The present utility model correspondingly arranges a liquid flow channel at the position on the back corresponding to the input bearing with a higher rotational speed, so as to strengthen the heat dissipation effect of these positions and avoid the accumulation of heat at these positions. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, and all of them are within the protection scope of the present utility model.

[0026] Figure 1 It is a three-dimensional structure schematic diagram of the reducer provided by the present utility model;

[0027] Figure 2 It is a schematic diagram of the position layout of the bearing installation cavity on the first housing in the present utility model;

[0028] Figure 3 It is a schematic diagram of the position layout of the liquid flow channel in the present utility model;

[0029] Figure 4 It is a schematic diagram of the flow path of the liquid in the liquid flow channel in the present utility model;

[0030] Figure 5 It is a schematic diagram of the structure of the first liquid flow channel in the present utility model;

[0031] Figure 6 It is a schematic diagram of the structure of the second liquid flow channel in the present utility model;

[0032] Figure 7 It is a schematic diagram of the structure of the third liquid flow channel in the present utility model;

[0033] Figure 8 It is a schematic diagram of the structure of the fourth liquid flow channel in the present utility model;

[0034] Figure 9Schematic diagram of the fifth liquid flow channel structure in the present utility model;

[0035] Figure 10 Schematic diagram of the sixth liquid flow channel structure in the present utility model;

[0036] Figure 11 Exploded structural diagram of the first housing and the cover plate in the present utility model;

[0037] Figure 12 Three-dimensional structural diagram of the cover plate in the present utility model;

[0038] Figure 13 Position relationship diagram of the buffer baffle and the cavity in the present utility model.

[0039] Components and their numbers in the figure:

[0040] First housing 100, liquid inlet end 110, liquid outlet end 120, peripheral wall 130, rib plate 140, cover plate 150, buffer baffle 151, fourth buffer baffle 1513, liquid outlet 141, third liquid outlet 2131, fourth liquid outlet 2141, output end bearing installation cavity 11, first bearing installation cavity 12, second bearing installation cavity 13, third bearing installation cavity 14, first liquid flow channel 21, first cavity 211, second cavity 212, third cavity 213, fourth cavity 214, fifth cavity 215, sixth cavity 216, second liquid flow channel 22, first sector cavity 221, second sector cavity 222, third sector cavity 223, fourth sector cavity 224, first channel 225, second channel 226, third channel 227, fourth channel 228, third liquid flow channel 23, seventh cavity 231, eighth cavity 232, ninth cavity 233, tenth cavity 234, eleventh cavity 235, twelfth cavity 236, thirteenth cavity 237, fourteenth cavity 238, fourth liquid flow channel 24, fifth sector cavity 241, sixth sector cavity 242, seventh sector cavity 243, eighth sector cavity 244, fifth liquid flow channel 25, fifteenth cavity 251, sixteenth cavity 252, seventeenth cavity 253, eighteenth cavity 254, nineteenth cavity 255, twentieth cavity 256, twenty-first cavity 257, twenty-second cavity 258, sixth liquid flow channel 26, ninth sector cavity 261, tenth sector cavity 262, eleventh sector cavity 263, twelfth sector cavity 264, fifth channel 265, sixth channel 266, seventh channel 267, eighth channel 268, second housing 200. Specific implementation manner

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements. If there is no conflict, the embodiments of the present utility model and the various features in the embodiments can be combined with each other, and all are within the protection scope of the present utility model.

[0042] Embodiment 1

[0043] As Figure 1 shown, this embodiment provides a speed reducer. The speed reducer in this embodiment is used to convert the power input by the motor according to a certain transmission ratio and output it through the output end of the speed reducer. The speed reducer housing in this embodiment includes a first housing 100 and a second housing 200.

[0044] After the first housing 100 and the second housing 200 are combined into a box, they form a complete speed reducer housing. The gear transmission system of the speed reducer and supporting components such as bearings are installed in the cavity surrounded by the first housing 100 and the second housing 200. The second housing 200 is the housing at the end of the speed reducer close to the motor, and the first housing 100 is the housing at the end of the speed reducer facing away from the motor.

[0045] As Figure 2 shown, an output end bearing installation cavity 11, a first bearing installation cavity 12, a second bearing installation cavity 13, and a third bearing installation cavity 14 are provided on the first housing 100. The output end bearing installation cavity 11 is used to install the bearing at the output end of the speed reducer.

[0046] In this embodiment, three input gears can be used for power input. The first bearing installation cavity 12 is used to install the bearing at one end of the first input gear close to the motor, the second bearing installation cavity 13 is used to install the bearing at one end of the second input gear close to the motor, and the third bearing installation cavity 14 is used to install the bearing at one end of the third input gear close to the motor.

[0047] As Figure 3 shown, at one end of the first housing 100 facing away from the second housing 200, a liquid flow channel is provided, and the liquid flow channel is divided into a first liquid flow channel 21, a second liquid flow channel 22, a third liquid flow channel 23, a fourth liquid flow channel 24, a fifth liquid flow channel 25, and a sixth liquid flow channel 26.

[0048] In this embodiment, one side of the liquid flow channel is close to the inner cavity of the first housing 100, and the other side is near the surface of the first housing 100. In this way, while the liquid continuously flows in the liquid flow channel, the heat of the reducer housing is quickly taken away, and it is beneficial to dissipate the heat inside the reducer housing to the outside of the reducer housing. A liquid inlet end 110 communicating with the first liquid flow channel 21 and a liquid outlet end 120 communicating with the sixth liquid flow channel 26 are further provided on the first housing 100; the aforementioned liquid can be water, coolant, antifreeze, etc. that can be used for cooling and heat dissipation, and the specific type of liquid used here is not limited.

[0049] The first liquid flow channel 21, the second liquid flow channel 22, the third liquid flow channel 23, the fourth liquid flow channel 24, the fifth liquid flow channel 25, and the sixth liquid flow channel 26 are connected in sequence, that is, the water outlet of the first liquid flow channel 21 is connected to the second liquid flow channel 22, the water outlet of the second liquid flow channel 22 is connected to the third liquid flow channel 23, the water outlet of the third liquid flow channel 23 is connected to the fourth liquid flow channel 24, the water outlet of the fourth liquid flow channel 24 is connected to the fifth liquid flow channel 25, and the water outlet of the fifth liquid flow channel 25 is connected to the sixth liquid flow channel 26.

[0050] As Figure 4 shown, after adopting the structure in which the aforementioned six liquid flow channels are connected in sequence, the liquid for cooling enters the first liquid flow channel 21 through the liquid inlet end 110 provided on the first housing 100, then flows from the first liquid flow channel 21 into the second liquid flow channel 22, then from the second liquid flow channel 22 into the third liquid flow channel 23, then from the third liquid flow channel 23 into the fourth liquid flow channel 24, then from the fourth liquid flow channel 24 into the fifth liquid flow channel 25, then from the fifth liquid flow channel 25 into the sixth liquid flow channel 26, and finally flows out from the liquid outlet end 120 on the first housing 100.

[0051] Among them, the second liquid flow channel 22 is located on the back of the position where the first bearing mounting cavity 12 is located, the fourth liquid flow channel 24 is located on the back of the position where the second bearing mounting cavity 13 is located, and the sixth liquid flow channel 26 is located on the back of the position where the third bearing mounting cavity 14 is located;

[0052] Three bearing mounting cavities are respectively installed with bearings of three input gears. The bearings at the positions where these three mounting cavities are located have high rotational speeds and large heat generation. In this embodiment, the second liquid flow channel 22, the fourth liquid flow channel 24, and the sixth liquid flow channel 26 are respectively arranged on the backs of the aforementioned three bearing mounting cavities, so that when the liquid passes through the aforementioned three flow channels, it flows at the positions facing the aforementioned three bearing mounting cavities, so as to quickly absorb and carry away the heat generated by the high-speed rotation of the bearings of the three input shafts, avoiding the situation of untimely heat dissipation in these places.

[0053] The first liquid flow channel 21, the second liquid flow channel 22, the third liquid flow channel 23, the fourth liquid flow channel 24, the fifth liquid flow channel 25, and the sixth liquid flow channel 26 are arranged in sequence around the output end bearing mounting cavity 11. The first liquid flow channel 21 is located at the lower part of the first housing 100, and the sixth flow channel 26 is located at the upper part of the first housing 100.

[0054] Since the liquid in the liquid flow channels flows sequentially along the arrangement path of the first liquid flow channel 21, the second liquid flow channel 22, the third liquid flow channel 23, the fourth liquid flow channel 24, the fifth liquid flow channel 25, and the sixth liquid flow channel 26, after adopting the aforementioned structure, the liquid in the flow channels starts from the lower part of the first housing 100 of the reducer and gradually flows towards the upper part of the reducer along the circumferential direction of the rotation of the output end large gear. And the liquid flow channels are integrally divided into six liquid flow channels, which can increase the contact between the liquid and the surface of the first housing 100 during the flow process, so that the liquid can fill all the spaces of the liquid flow channels as much as possible, effectively avoiding the situation of untimely heat dissipation in some areas, thereby improving the overall heat dissipation effect of the reducer.

[0055] When the reducer is working, the lubricating oil in the reducer is splashed to the upper part of the reducer after being agitated by the gears, and then flows downward under the action of gravity. In this embodiment, the liquid used for cooling flows reversely relative to the lubricating oil in the liquid flow channels, so the heat in the lubricating oil can be quickly carried away, further improving the heat dissipation effect of the reducer.

[0056] In this embodiment, the first liquid flow channel 21, the second liquid flow channel 22, the third liquid flow channel 23, the fourth liquid flow channel 24, the fifth liquid flow channel 25, and the sixth liquid flow channel 26 are divided into multiple cavities.

[0057] For example, the first liquid flow channel 21 is a relatively large cavity formed by the peripheral wall of the speed reducer and the rib plates. In this embodiment, more rib plates are also used to divide the first liquid flow channel 21 into more relatively small cavities. In this way, when the liquid flows in the first liquid flow channel 21, due to the obstruction of the peripheral wall and the rib plates on each small cavity, the liquid flows through each small cavity along a relatively tortuous path, so that the liquid can flow to each area of the first liquid flow channel 21 as much as possible, making the liquid fully contact with each area of the first liquid flow channel 21 during the flow process, thereby increasing the contact between the liquid and the first housing 100, so that the heat dissipation of the speed reducer is more sufficient and the heat dissipation efficiency is higher. Similarly, the second liquid flow channel 22, the third liquid flow channel 23, the fourth liquid flow channel 24, the fifth liquid flow channel 25 and the sixth liquid flow channel 26 are all divided into multiple small cavities, so that the liquid can fully contact each area in these liquid flow channels, further improving the overall heat dissipation effect of the speed reducer.

[0058] In this embodiment, the second liquid flow channel 22 includes a plurality of fan-shaped cavities formed by the peripheral wall and the rib plates. The plurality of fan-shaped cavities are arranged in sequence along the circumferential direction of the second liquid flow channel 22, and the liquid sequentially passes through the plurality of fan-shaped cavities along the arrangement sequence of the plurality of fan-shaped cavities.

[0059] After entering the second liquid flow channel 22, the liquid sequentially passes through each fan-shaped cavity along the circumferential direction of the second liquid flow channel 22. After the liquid makes a full circle in the liquid flow channel, it flows into the next flow channel through the outlet. By adopting the foregoing method, the liquid can flow through each fan-shaped area on the back of the first input bearing installation cavity, so as to sufficiently dissipate heat and cool down the first input bearing installation position.

[0060] As Figure 6 shown, in this embodiment, the plurality of fan-shaped cavities include a first fan-shaped cavity 221, a second fan-shaped cavity 222, a third fan-shaped cavity 223 and a fourth fan-shaped cavity 224. The liquid sequentially flows through the first fan-shaped cavity 221, the second fan-shaped cavity 222, the third fan-shaped cavity 223 and the fourth fan-shaped cavity 224. The first fan-shaped cavity 221 is communicated with the first liquid flow channel 21 through a first channel 225. The second fan-shaped cavity 222 is communicated with the first fan-shaped cavity 221 through a second channel 226. The third fan-shaped cavity 223 is communicated with the second fan-shaped cavity 222 through a third channel 227. The fourth fan-shaped cavity 224 is communicated with the third fan-shaped cavity 223 through a fourth channel 228. The second liquid flow channel 22 is surrounded by a circular peripheral wall 130, and the second liquid flow channel 22 is divided into four fan-shaped cavities by two intersecting rib plates 140.

[0061] As Figure 6As shown, the first channel 225 is located on the peripheral wall 130 of the first sector cavity 221. The peripheral wall 130 of the first sector cavity 221 is an arc. One end of this arc is close to the second sector cavity 222, and the other end is close to the fourth sector cavity 224. The first channel 225 is provided at one end of this arc that is close to the fourth sector cavity 224, i.e., far from the second sector cavity 222.

[0062] As Figure 6 As shown, the first sector cavity 221 is surrounded by a circular arc-shaped peripheral wall 130 and two rib plates 140. One of the rib plates 140 is closer to the first channel 225, and the other rib plate 140 is farther from the first channel 225. The second channel 226 is located at the rib plate 140 on the first cavity 211 that is far from the first channel 225, and the second channel 226 is located at one end of this rib plate 140 close to the peripheral wall 130, while the first channel 225 faces the other end of this rib plate 140, i.e., the end far from the peripheral wall 130. The second channel 226 faces the peripheral wall 130 of the second cavity 212.

[0063] After adopting the above structure, a part of the liquid entering the first sector cavity 221 will not directly flow into the second sector cavity 222 through the second channel 226, but will be blocked by the rib plate 140 and the peripheral wall 130 to form a buffer. In this way, the liquid can be made to fill the entire first sector cavity 221 as much as possible during the flow process, thereby further increasing the contact between the liquid and the sector cavity and further improving the heat dissipation effect of the housing.

[0064] Among them, the third sector cavity 223 is also surrounded by an arc-shaped peripheral wall 130 and two rib plates 140. One rib plate 140 is closer to the second cavity 212, and the other is farther from the second cavity 212. The third channel 227 is located on the rib plate 140 that is farther from the second cavity 212. The third channel 227 is located at a position on the rib plate 140 that is far from the center of the first bearing installation cavity 12, i.e., the third channel 227 is provided at the end of the rib plate 140 that is closer to the peripheral wall. The fourth channel 228 is located on the rib plate 140 of the third cavity 213 that is far from the second cavity 212. The fourth channel 228 is located at a position on the rib plate 140 that is close to the center of the first bearing installation cavity 12.

[0065] After adopting the foregoing structure, a part of the liquid entering the third sector cavity 223 will not directly flow into the fourth sector cavity 224 through the fourth channel 228, but will be blocked by the rib plate 140 and the peripheral wall 130 to form a buffer. In this way, the liquid can be made to fill the entire third sector cavity 223 as much as possible during the flow process, thereby increasing the contact between the liquid and the sector cavity to improve the heat dissipation effect of the housing.

[0066] As Figure 8As shown, the fourth liquid flow channel 24 includes a plurality of sector cavities surrounded by a peripheral wall and rib plates. The plurality of sector cavities are arranged in sequence along the circumferential direction of the fourth liquid flow channel 24, and the liquid passes through the plurality of sector cavities in sequence according to the arrangement order of the plurality of sector cavities.

[0067] After entering the fourth liquid flow channel 24, the liquid passes through each sector cavity in sequence along the circumferential direction of the fourth liquid flow channel 24. After the liquid travels one week in the liquid flow channel, it flows into the next flow channel through the liquid outlet. By adopting the foregoing method, the liquid can flow through each sector area on the back of the second input bearing installation cavity in sequence, so as to sufficiently dissipate heat and cool down the installation position of the second input bearing.

[0068] In this embodiment, the plurality of sector cavities of the fourth liquid flow channel 24 include a fifth sector cavity 241, a sixth sector cavity 242, a seventh sector cavity 243, and an eighth sector cavity 244. The liquid flows through the fifth sector cavity 241, the sixth sector cavity 242, the seventh sector cavity 243, and the eighth sector cavity 244 in sequence.

[0069] As Figure 10 shown, in this embodiment, the sixth liquid flow channel 26 includes a plurality of sector cavities surrounded by a peripheral wall and rib plates. The plurality of sector cavities are arranged in sequence along the circumferential direction of the sixth liquid flow channel 26, and the liquid passes through the plurality of sector cavities in sequence according to the arrangement order of the plurality of sector cavities.

[0070] After entering the sixth liquid flow channel 26, the liquid passes through each sector cavity in sequence along the circumferential direction of the fourth liquid flow channel 24. After the liquid travels one week in the sixth liquid flow channel 26, it flows out through the liquid outlet. By adopting the foregoing method, the liquid can flow through each sector area on the back of the third input bearing installation cavity in sequence, so as to sufficiently dissipate heat and cool down the installation position of the third input bearing.

[0071] In this embodiment, the plurality of sector cavities of the sixth liquid flow channel 26 include a ninth sector cavity 261, a tenth sector cavity 262, an eleventh sector cavity 263, and a twelfth sector cavity 264. The liquid flows through the ninth sector cavity 261, the tenth sector cavity 262, the eleventh sector cavity 263, and the twelfth sector cavity 264 in sequence.

[0072] The ninth sector-shaped cavity 261 is communicated with the fifth liquid flow channel 25 through the fifth channel 265, the tenth sector-shaped cavity 262 is communicated with the ninth sector-shaped cavity 261 through the sixth channel 266, the eleventh sector-shaped cavity 263 is communicated with the tenth sector-shaped cavity 262 through the seventh channel 267, and the eleventh sector-shaped cavity 263 is communicated with the tenth sector-shaped cavity 262 through the eighth channel 268. The sixth channel 266, the seventh channel 267 and the eighth channel 268 are respectively arranged on three ribs for separating the sixth liquid flow channel 26, wherein the sixth channel 266 and the seventh channel 267 are located at one end of the rib far from the center of the third input bearing installation cavity, and the eighth channel 268 is located at one end of the rib far from the center of the third input bearing installation cavity. In this way, a portion of the liquid flowing from the seventh channel 267 into the eleventh fan-shaped cavity 263 will not flow out directly from the eighth channel 268, but will flow to the rib plate under the action of gravity, and after being blocked and buffered by the rib plate, will flow to various areas of the eleventh fan-shaped cavity 263, thereby increasing the contact between the liquid and the first shell 100 during the flow process.

[0073] like Figure 5 As shown, in this embodiment, the first liquid flow channel 21 includes a first cavity 211, a second cavity 212, a third cavity 213, a fourth cavity 214, a fifth cavity 215 and a sixth cavity 216. The first cavity 211, the second cavity 212 and the third cavity 213 are located on a side of the first liquid flow channel 21 away from the output end bearing installation cavity 11, the fourth cavity 214 and the fifth cavity 215 are located on a side of the first liquid flow channel 21 close to the output end bearing installation cavity 11, and the sixth cavity 216 is communicated with the second flow channel;

[0074] The liquid outlet of the first cavity 211 is connected to the second cavity 212, the liquid outlet of the second cavity 212 is connected to the third cavity 213, the liquid outlet of the third cavity 213 is connected to the fourth cavity 214, one liquid outlet of the fourth cavity 214 is connected to the fifth cavity 215, and the other liquid outlet is connected to the sixth cavity 216. The fifth cavity 215 is located on the side of the fourth cavity 214 away from the sixth cavity 216.

[0075] With the above structure, the liquid flows from the first cavity 211 through the second cavity 212, the third cavity 213, and the fourth cavity 214 in sequence, and then a part of the liquid flows from the fourth cavity 214 into the sixth cavity 216, and another part of the liquid flows from the fourth cavity 214 into the fifth cavity 215. When the liquid flows along the above path and direction, it can take away the heat generated by the inner cavity of the reducer after fully contacting the surface of the first shell 100, thereby further increasing the efficiency of water cooling.

[0076] After adopting the foregoing structure and flow path, part of the liquid can continue to flow towards the liquid outlet end 120 through the sixth cavity 216 after passing through the fourth cavity 214, and the other part of the liquid can enter the fifth cavity 215 to fully contact the corner area in the first liquid flow path 21. Since the fifth cavity 215 and the sixth cavity 216 are respectively located on both sides of the fourth cavity 214, these two liquid flows do not affect each other. Therefore, in this embodiment, good heat dissipation can be achieved at each position of the first liquid flow path 21 without affecting the heat dissipation speed of the subsequent liquid flow path.

[0077] The foregoing channels and liquid outlets can be manufactured by opening grooves on the rib plate. The groove is located at one end of the rib plate close to the inner cavity of the reducer, so that the liquid can flow as close as possible to the surface of the first housing 100 to quickly take away the heat on the housing. As Figure 11 and Figure 12 shown, in this embodiment, a buffer baffle 151 can also be provided at one end of the cavity far from the inner cavity of the reducer, and the buffer baffle 151 is at a certain distance from the bottom wall of the cavity. Specifically, when implementing, a cover plate 150 can be provided on the side of the first housing 100 facing away from the inner cavity of the reducer, and several protrusions extending towards the inner cavity of the reducer are provided on the inner side surface of the cover plate 150, and these protrusions serve as the foregoing buffer baffle 151. Since there is a certain distance between the buffer baffle 151 and the bottom wall of the cavity, part of the liquid can flow quickly along the bottom wall of the cavity, and the other part of the liquid flows to each area in the cavity after being buffered by the buffer baffle 151, thereby increasing the contact between the liquid and the surface of the first housing 100.

[0078] As Figure 13 shown, a fourth buffer baffle 1513 is provided in the fourth cavity 214 of the first liquid flow path 21. The fourth buffer baffle 1513 is located on the side of the liquid outlet (the third liquid outlet 2131) of the third cavity 213 close to the fifth cavity 215, and the fourth buffer baffle 1513 is located on the side of the liquid outlet (the fourth liquid outlet 2141) of the fourth cavity 214 close to the third cavity 213. In this way, part of the water flow flowing from the third liquid outlet 2131 into the fourth cavity 214 flows towards the fifth cavity 215 under the guidance of the buffer baffle 151, and part of the water flow flows towards the direction in the fourth cavity 214 away from the fourth liquid outlet 2141 under the guidance of the buffer baffle 151 to fill the other parts of the fourth cavity 214. It can be seen that through the guidance of the buffer baffle 151, the liquid can flow fully in each chamber, thereby increasing the contact between the liquid and the surface of the first housing 100.

[0079] As Figure 7As shown, in this embodiment, the third liquid flow channel 23 includes a seventh cavity 231, an eighth cavity 232, a ninth cavity 233, a tenth cavity 234, an eleventh cavity 235, a twelfth cavity 236, a thirteenth cavity 237 and a fourteenth cavity 238;

[0080] The seventh cavity 231, the eighth cavity 232, the thirteenth cavity 237 and the fourteenth cavity 238 are located on the side of the third liquid flow channel 23 close to the output end bearing installation cavity 11, the ninth cavity 233, the tenth cavity 234, the eleventh cavity 235 and the twelfth cavity 236 are located on the side of the first flow channel away from the output end bearing installation cavity 11, and the fourteenth cavity 238 is connected to the third flow channel;

[0081] The liquid inlet of the seventh cavity 231 is communicated with the second liquid flow channel 22, the liquid outlet of the seventh cavity 231 is communicated with the eighth cavity 232, the liquid outlet of the eighth cavity 232 is communicated with the ninth cavity 233, the liquid outlet of the ninth cavity 233 is communicated with the tenth cavity 234, the liquid outlet of the tenth cavity 234 is communicated with the eleventh cavity 235, the first liquid outlet of the eleventh cavity 235 is communicated with the twelfth cavity 236, the second liquid outlet of the eleventh cavity 235 is communicated with the thirteenth cavity 237, the liquid outlet of the thirteenth cavity 237 is communicated with the fourteenth cavity 238, the liquid outlet of the twelfth cavity 236 is communicated with the thirteenth cavity 237, the liquid outlet of the thirteenth cavity 237 is communicated with the fourteenth cavity 238, the first liquid outlet is located above the second liquid outlet, and the twelfth cavity 236 is located above the eleventh cavity 235.

[0082] After adopting the above structure, the liquid flows from the seventh cavity 231 to the eighth cavity 232, the ninth cavity 233, the tenth cavity 234, and the eleventh cavity 235 in sequence, and then a part of the liquid flows from the eleventh cavity 235 into the twelfth cavity 236, and another part of the liquid flows from the eleventh cavity 235 into the thirteenth cavity 237, and the liquid in the twelfth cavity 236 can also flow into the thirteenth cavity 237. The liquid in the thirteenth cavity 237 flows into the fourteenth cavity 238.

[0083] When the liquid flows in the third liquid flow channel 23 according to the aforementioned path and direction, it can take away the heat generated by the inner cavity of the reducer after fully contacting the surface of the first shell 100, thereby further increasing the efficiency of water cooling and heat dissipation.

[0084] After the third liquid flow channel 23 adopts the foregoing structural flow path, a part of the liquid can continue to flow in the direction of the liquid outlet end 120 through the thirteenth cavity 237 after passing through the eleventh cavity 235, and another part of the liquid can enter the twelfth cavity 236 to fill the upper corner area in the third liquid flow channel 23. The two liquid flows do not affect each other. The liquid in the twelfth cavity 236 can also flow along the inner wall of the top of the second cavity 212 into the top of the thirteenth cavity 237, so that the liquid can also be in full contact with each area of the thirteenth cavity 237. Therefore, in this embodiment, good heat dissipation can be achieved at each position of the third liquid flow channel 23 without affecting the heat dissipation speed of the subsequent liquid flow channel.

[0085] As Figure 9 shown in this embodiment, the fifth liquid flow channel 25 includes a fifteenth cavity 251, a sixteenth cavity 252, a seventeenth cavity 253, an eighteenth cavity 254, a nineteenth cavity 255, a twentieth cavity 256, a twenty-first cavity 257, and a twenty-second cavity 258;

[0086] The fifteenth cavity 251, the sixteenth cavity 252, the twenty-first cavity 257, and the twenty-second cavity 258 are located on one side of the fifth flow channel close to the output end bearing installation cavity 11, and the seventeenth cavity 253, the eighteenth cavity 254, the nineteenth cavity 255, and the twentieth cavity 256 are located on the side of the fifth flow channel far from the output end bearing installation cavity 11. The twenty-second cavity 258 communicates with the sixth flow channel;

[0087] The liquid inlet of the fifteenth cavity 251 communicates with the fourth flow channel, the liquid outlet of the fifteenth cavity 251 communicates with the sixteenth cavity 252, the liquid outlet of the sixteenth cavity 252 communicates with the seventeenth cavity 253, and the liquid outlet of the seventeenth cavity 253 communicates with the eighteenth cavity 254.

[0088] The liquid outlet of the eighteenth cavity 254 communicates with the nineteenth cavity 255, the first liquid outlet of the nineteenth cavity 255 communicates with the twenty-first cavity 257, the second liquid outlet of the nineteenth cavity 255 communicates with the twentieth cavity 256, the liquid outlet of the twentieth cavity 256 communicates with the twenty-first cavity 257, the liquid outlet of the twenty-first cavity 257 communicates with the twenty-second cavity 258. The twentieth cavity 256 is located above the twenty-first cavity 257, and the twentieth cavity 256 is located on the side of the nineteenth cavity 255 far from the fourth flow channel.

[0089] After adopting the above structure, the liquid flows from the fifteenth cavity 251 through the sixteenth cavity 252, the seventeenth cavity 253, the eighteenth cavity 254, and the nineteenth cavity 255 in sequence, and then a part of the liquid flows from the nineteenth cavity 255 into the twentieth cavity 256, and another part of the liquid flows from the nineteenth cavity 255 into the twenty-first cavity 257, and the liquid in the twentieth cavity 256 can also flow into the twenty-first cavity 257. The liquid in the twenty-first cavity 257 then flows into the twenty-second cavity 258.

[0090] When the liquid flows in the fifth liquid flow channel 25 according to the aforementioned path and direction, it can take away the heat generated by the inner cavity of the reducer after fully contacting the surface of the first shell 100, thereby further increasing the efficiency of water cooling and heat dissipation.

[0091] like Figure 9 As shown, the liquid outlet 141 of the seventeenth cavity 253 and the liquid outlet 141 of the eighteenth cavity 254 are arranged at different heights, and the liquid outlet 141 of the eighteenth cavity 254 and the liquid outlet 141 of the nineteenth cavity 255 are arranged at different heights. After adopting the above structure, a part of the liquid in the seventeenth cavity 253 will not flow out directly from the liquid outlet 141 of the eighteenth cavity 254, but will flow to various parts of the eighteenth cavity 254 after being buffered by the inner wall of the eighteenth cavity 254. Similarly, a part of the liquid in the nineteenth cavity 255 will not flow out directly from the liquid outlet 141 of the nineteenth cavity 255, but will flow to various parts of the nineteenth cavity 255 after being buffered by the inner wall of the nineteenth cavity 255. In this way, the contact area between the liquid and the surface of the first shell 100 can be further increased, thereby improving the heat dissipation effect of the reducer.

[0092] After the aforementioned structure and flow path of the third liquid flow channel 23, a part of the liquid can continue to flow toward the liquid outlet end 120 through the twenty-first cavity 257 after passing through the nineteenth cavity 255, and the other part of the liquid can enter the twenty-second cavity 258 to fill the upper left corner area in the third liquid flow channel 23. The two liquid flows do not affect each other. The liquid in the twenty-first cavity 257 can also flow into the twenty-second cavity 258 from the top of the twenty-second cavity 258, so that the liquid can also fully contact various areas of the twenty-second cavity. Therefore, this embodiment can achieve good heat dissipation at various positions of the fifth liquid flow channel 25 without affecting the heat dissipation speed of subsequent liquid flow channels.

[0093] In this embodiment, the outer edges of the first liquid flow channel 21 and the third liquid flow channel 23 form a semi-surrounding structure, and at least a part of the second liquid flow channel 22 is located within the semi-surrounding structure formed by the first liquid flow channel 21 and the third liquid flow channel 23. The outer edges of the third liquid flow channel 23 and the fifth liquid flow channel 25 form a semi-surrounding structure, and at least a part of the fourth liquid flow channel 24 is located within the semi-surrounding structure formed by the third liquid flow channel 23 and the fifth liquid flow channel 25.

[0094] In this embodiment, by guiding the liquid to flow in the second liquid flow channel 22, the heat dissipation of the position of the first input bearing is strengthened. And by setting the second liquid flow channel 22 to be partially embedded in the semi-surrounding structure of the first liquid flow channel 21 and the third liquid flow channel 23, there is liquid flow and sufficient contact with the back surface and the vicinity of the cavity wall of the first input bearing installation cavity, so that a large amount of heat generated by the high-speed rotation of the first input bearing can be quickly taken away, avoiding heat accumulation at the bearing position. Similarly, the fourth liquid flow channel 24 is embedded in the semi-surrounding structure formed by the third liquid flow channel 23 and the fifth liquid flow channel 25, so that a large amount of heat generated by the high-speed rotation of the input bearing can be quickly taken away by the flowing liquid, thereby further improving the heat dissipation effect of the reducer.

[0095] The dashed boxes in the foregoing drawings are used to represent the position ranges of the respective liquid flow channels, rather than the lines representing the actual structure of the reducer.

[0096] For the reducer in this embodiment, an experimental test on the heat dissipation effect is carried out under working conditions. When the fan is not started and only water flow is introduced into the liquid flow channel, after the reducer runs at a speed of 6000 rpm for 1.6 hours, the oil temperature stabilizes at 53 degrees Celsius.

[0097] When the initial temperature is 45 degrees Celsius and no water flow is introduced into the liquid flow channel, the temperature of the reducer reaches 135 degrees Celsius after running at a speed of 9400 rpm for 1 hour and 20 minutes.

[0098] When the initial temperature is 45 degrees Celsius and water flow is introduced into the liquid flow channel, the temperature of the reducer stabilizes at 81 degrees Celsius after running at a speed of 9400 rpm for 1 hour and 20 minutes.

[0099] It can be seen from the foregoing experiments that the reducer with water-cooled heat dissipation in this embodiment can achieve good heat dissipation effect.

[0100] Embodiment 2

[0101] This embodiment provides a new energy vehicle, which includes the reducer described in Embodiment 1. Since the new energy vehicle in this embodiment adopts the reducer in Embodiment 1, the new energy vehicle has good heat dissipation performance and lower cost.

[0102] The above is a detailed introduction to a speed reducer and a new energy vehicle provided by the embodiments of the present utility model.

[0103] The above is only the specific implementation manner of the present utility model. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated herein. It should be understood that the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model.

Claims

1. Reducer, characterized in that, It includes a reducer housing, on which a first bearing mounting cavity, a second bearing mounting cavity and a third bearing mounting cavity are provided; One end of the reducer housing is provided with a liquid flow channel, which is divided into a first liquid flow channel, a second liquid flow channel, a third liquid flow channel, a fourth liquid flow channel, a fifth liquid flow channel and a sixth liquid flow channel; The first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel and the sixth liquid flow channel are connected in sequence. Among them, the second liquid flow channel is located on the back of the position where the first bearing mounting cavity is located, the fourth liquid flow channel is located on the back of the position where the second bearing mounting cavity is located, and the sixth liquid flow channel is located on the back of the position where the third bearing mounting cavity is located; The reducer housing is also provided with a liquid inlet end communicated with the first liquid flow channel and a liquid outlet end communicated with the sixth liquid flow channel.

2. The speed reducer according to claim 1, wherein, The reducer housing is provided with an output end bearing mounting cavity. The first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel and the sixth liquid flow channel are arranged in sequence around the output end bearing mounting cavity. The first liquid flow channel is located at the lower part of the first housing, and the sixth liquid flow channel is located at the upper part of the first housing.

3. The speed reducer according to claim 1, wherein The first liquid flow channel, the second liquid flow channel, the third liquid flow channel, the fourth liquid flow channel, the fifth liquid flow channel and the sixth liquid flow channel are divided into multiple cavities.

4. The speed reducer according to claim 3, wherein The second liquid flow channel includes a number of fan-shaped cavities surrounded by a peripheral wall and rib plates. The number of fan-shaped cavities are arranged in sequence along the circumferential direction of the second liquid flow channel, and the liquid passes through the number of fan-shaped cavities in sequence according to the arrangement order of the number of fan-shaped cavities.

5. The speed reducer according to claim 4, wherein The number of fan-shaped cavities includes a first fan-shaped cavity, a second fan-shaped cavity, a third fan-shaped cavity and a fourth fan-shaped cavity. The liquid flows through the first fan-shaped cavity, the second fan-shaped cavity, the third fan-shaped cavity and the fourth fan-shaped cavity in sequence. The first fan-shaped cavity is communicated with the first liquid flow channel, the second fan-shaped cavity is communicated with the first fan-shaped cavity, the third fan-shaped cavity is communicated with the second fan-shaped cavity, and the fourth fan-shaped cavity is communicated with the third fan-shaped cavity.

6. The speed reducer according to claim 3, characterized in that, The first liquid flow channel includes a first cavity, a second cavity, a third cavity, a fourth cavity, a fifth cavity and a sixth cavity. The first cavity, the second cavity and the third cavity are located on the side of the first liquid flow channel far from the output end bearing mounting cavity, and the fourth cavity, the fifth cavity and the sixth cavity are located on the side of the first liquid flow channel close to the output end bearing mounting cavity. The sixth cavity is communicated with the second liquid flow channel; The liquid outlet of the first cavity is communicated with the second cavity, the liquid outlet of the second cavity is communicated with the third cavity, the liquid outlet of the third cavity is communicated with the fourth cavity, one liquid outlet of the fourth cavity is communicated with the fifth cavity, and the other liquid outlet is communicated with the sixth cavity.

7. The speed reducer according to claim 3, wherein The third liquid flow channel includes a seventh cavity, an eighth cavity, a ninth cavity, a tenth cavity, an eleventh cavity, a twelfth cavity, a thirteenth cavity and a fourteenth cavity; The seventh cavity, eighth cavity, thirteenth cavity, and fourteenth cavity are located on one side of the third liquid flow channel close to the output end bearing installation cavity. The ninth cavity, tenth cavity, eleventh cavity, and twelfth cavity are located on the side of the third liquid flow channel far from the output end bearing installation cavity. The fourteenth cavity communicates with the fourth liquid flow channel; The liquid inlet of the seventh cavity communicates with the second liquid flow channel. The liquid outlet of the seventh cavity communicates with the eighth cavity. The liquid outlet of the eighth cavity communicates with the ninth cavity. The liquid outlet of the ninth cavity communicates with the tenth cavity. The liquid outlet of the tenth cavity communicates with the eleventh cavity. The first liquid outlet of the eleventh cavity communicates with the twelfth cavity. The second liquid outlet of the eleventh cavity communicates with the thirteenth cavity. The liquid outlet of the thirteenth cavity communicates with the fourteenth cavity. The liquid outlet of the twelfth cavity communicates with the thirteenth cavity. The liquid outlet of the thirteenth cavity communicates with the fourteenth cavity.

8. The speed reducer according to claim 3, wherein The fifth liquid flow channel includes a fifteenth cavity, sixteenth cavity, seventeenth cavity, eighteenth cavity, nineteenth cavity, twentieth cavity, twenty-first cavity, and twenty-second cavity; The fifteenth cavity, sixteenth cavity, twenty-first cavity, and twenty-second cavity are located on one side of the fifth liquid flow channel close to the output end bearing installation cavity. The seventeenth cavity, eighteenth cavity, nineteenth cavity, and twentieth cavity are located on the side of the fifth liquid flow channel far from the output end bearing installation cavity. The twenty-second cavity communicates with the sixth liquid flow channel; The liquid inlet of the fifteenth cavity communicates with the fourth liquid flow channel. The liquid outlet of the fifteenth cavity communicates with the sixteenth cavity. The liquid outlet of the sixteenth cavity communicates with the seventeenth cavity. The liquid outlet of the seventeenth cavity communicates with the eighteenth cavity; The liquid outlet of the eighteenth cavity communicates with the nineteenth cavity. The first liquid outlet of the nineteenth cavity communicates with the twenty-first cavity. The second liquid outlet of the nineteenth cavity communicates with the twentieth cavity. The liquid outlet of the twentieth cavity communicates with the twenty-first cavity. The liquid outlet of the twenty-first cavity communicates with the twenty-second cavity.

9. The speed reducer according to any one of claims 1 to 8, characterized in that The outer edges of the first liquid flow channel and the third liquid flow channel form a semi-surrounding structure. At least a part of the second liquid flow channel is within the semi-surrounding structure formed by the first liquid flow channel and the third liquid flow channel and / or the outer edges of the third liquid flow channel and the fifth liquid flow channel form a semi-surrounding structure. At least a part of the fourth liquid flow channel is within the semi-surrounding structure formed by the third liquid flow channel and the fifth liquid flow channel. A buffer baffle is provided in the liquid flow channel, and there is a gap between the buffer baffle and the bottom wall of the liquid flow channel close to the inner cavity of the reducer housing.

10. New energy vehicle, characterized in that, Including the reducer according to any one of claims 1 to 9.

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