A decelerator and vehicle

Abstract

The application belongs to the technical field of power systems, and discloses a reducer and a vehicle, wherein the reducer comprises a shell and a heat exchange structure, the inside of the shell has a containing cavity, the bottom of the shell has a protruding part, the inside of the protruding part forms a heat exchange cavity communicated with the containing cavity, the heat exchange structure is located in the heat exchange cavity, the inside of the heat exchange structure has a liquid cooling channel capable of containing liquid, the heat exchange structure is provided with a liquid inlet pipe extending out of the protruding part and a liquid outlet pipe extending out of the protruding part, and the liquid inlet pipe and the liquid outlet pipe are both communicated with the liquid cooling channel to realize cooling of gear oil by liquid, reduce the production and manufacturing difficulty of the reducer, reduce the production cost of the reducer, avoid the heat exchange structure from interfering with components in the containing cavity, and ensure stable work of the reducer.

Description

Technical Field

[0001] This application belongs to the technical field of power systems, specifically relating to a speed reducer and a vehicle. Background Technology

[0002] An automobile is a non-rail vehicle with multiple wheels that is driven by a power unit. It is mainly used to transport people and goods and is one of the most important means of transportation in modern society. An automobile mainly includes a power system, chassis system, body system, and electrical and electronic system. The power system is mainly used to generate and transmit power. The reducer is the core component of the power system. It is responsible for reducing the high speed from the drive shaft to a low speed and then transmitting it to the wheels through the half-shaft. While reducing the speed, it can also proportionally increase the output torque so that the wheels can obtain a large enough driving force to propel the car.

[0003] To reduce the friction coefficient of internal components of a speed reducer, gear oil is usually installed inside the speed reducer. When the speed reducer is working, the gear oil can form an oil film on the surface of the gears and bearings under the driving action of the gears and bearings, thereby reducing the friction coefficient of internal components of the speed reducer.

[0004] Currently, speed reducers typically use air cooling for heat dissipation, meaning that the wind blows onto the reducer during vehicle operation to carry away its heat. However, for high-speed operating conditions, air cooling alone is insufficient to meet the cooling requirements of the speed reducer. This leads to a continuous increase in the temperature of the gear oil inside the reducer, resulting in increased internal air pressure. The gear oil will leak out through oil seals and other points. At the same time, the high temperature environment can also cause gear oil failure and oil seal aging, thus affecting the lubrication effect of the gear oil and the sealing effect of the reducer. In severe cases, it can even cause the bearings and gears inside the reducer to burn out, affecting the service life of the reducer.

[0005] To ensure the service life of the gear reducer, one approach is to use liquid cooling to cool the gear oil, thereby improving the cooling effect, lowering the gear oil temperature, and ultimately extending the gear reducer's lifespan. Two main liquid cooling methods are considered. One involves installing liquid cooling channels in the reducer housing wall, allowing the liquid to carry away heat from the gear oil as it flows through these channels. While this achieves liquid cooling, creating these channels is challenging, impacting the reducer's manufacturing costs. The other method involves installing heat exchange tubes inside the reducer, using the liquid flowing within them to remove heat from the gear oil. While this also achieves liquid cooling, the heat exchange tubes may interfere with internal components, affecting the reducer's operational stability. Furthermore, the limited contact area between the heat exchange tubes and the gear oil results in less effective cooling of the gear oil. Utility Model Content

[0006] This application provides a speed reducer that, while reducing the difficulty of manufacturing the speed reducer, ensures the working stability of the speed reducer and increases the contact area between the heat exchange structure and the gear oil, thereby improving the cooling effect on the gear oil.

[0007] The technical solution adopted in this application is as follows: A speed reducer includes a housing and a heat exchange structure. The housing has an internal cavity and a protrusion at the bottom of the housing protruding outwards. The protrusion forms a heat exchange chamber communicating with the internal cavity. The heat exchange structure is located in the heat exchange chamber and has a liquid cooling channel capable of containing liquid. The heat exchange structure is provided with an inlet pipe extending out of the protrusion and an outlet pipe extending out of the protrusion. Both the inlet pipe and the outlet pipe are connected to the liquid cooling channel.

[0008] By adopting the above technical solution, after the reducer of this application is installed on the vehicle, the heat dissipation piping system on the vehicle needs to be connected to the inlet pipe and the outlet pipe respectively, so that the liquid in the heat dissipation piping system can enter the liquid cooling channel inside the heat exchange structure through the inlet pipe, and then the liquid flows in the liquid cooling channel and finally returns to the heat dissipation piping system through the outlet pipe.

[0009] Because the protrusion forms a heat exchange chamber that communicates with the accommodating cavity, and the heat exchange structure is located in the heat exchange chamber, the gear oil in the accommodating cavity can enter the heat exchange chamber and come into contact with the heat exchange structure. Thus, when the liquid flows in the liquid cooling channel, the liquid inside the liquid cooling channel can exchange heat with the gear oil inside the shell through the heat exchange structure, thereby achieving cooling of the gear oil through the liquid.

[0010] Furthermore, since a liquid cooling channel is formed inside the heat exchange structure and the heat exchange structure is located in the heat exchange cavity, the difficulty of forming the liquid cooling channel is reduced compared to the existing technology where the liquid cooling channel is located in the wall of the reducer housing. This reduces the difficulty of manufacturing the reducer and thus lowers the production cost of the reducer.

[0011] Furthermore, since the protrusion is located at the bottom of the housing and protrudes outwards from the housing, a heat exchange cavity is formed inside the protrusion. The heat exchange structure is located in the heat exchange cavity, which allows the heat exchange structure to avoid interfering with the components in the housing cavity, thereby ensuring the stable operation of the reducer.

[0012] Meanwhile, since the protrusion is located at the bottom of the housing and forms a heat exchange chamber that communicates with the accommodating cavity, the heat exchange structure can be completely immersed in the gear oil, thereby increasing the contact area between the heat exchange structure and the gear oil. This greatly improves the cooling effect of the heat exchange structure on the gear oil, thus avoiding leakage due to high-temperature expansion of the gear oil caused by high-speed vehicle operation, as well as accelerated gear oil failure and oil seal aging, thereby ensuring the service life of the reducer.

[0013] Furthermore, since the protrusion is designed to protrude outwards from the housing, it can also increase the contact area between the reducer and the air, thereby improving the heat dissipation effect of air cooling on the reducer, and further enhancing the heat dissipation effect of the reducer.

[0014] Optionally, the heat exchange structure includes an inlet collector connected to the inlet pipe, an outlet collector connected to the outlet pipe, and a first distributor connected to the inlet collector and the outlet collector, wherein the first distributor has multiple first distribution channels inside.

[0015] By adopting the above technical solution, when the reducer is cooled, the liquid in the cooling pipe system enters the inlet collector through the inlet pipe, the liquid in the inlet collector enters the first distributor, and then the liquid enters the outlet collector through multiple first distribution channels inside the first distributor. The liquid in the outlet collector finally returns to the cooling pipe system through the outlet pipe.

[0016] Because the first distributor has multiple first distribution channels inside, the contact area between the liquid and the first distributor is increased, thereby improving the heat exchange effect between the liquid and the gear oil through the first distributor, and further improving the cooling effect on the gear oil.

[0017] Furthermore, since the liquid inlet collector is connected to the liquid inlet pipe, the difficulty of connecting the heat exchange structure to the liquid inlet pipe is reduced, thus avoiding the need for multiple pipes to be connected to the liquid inlet pipe, and further reducing the manufacturing difficulty of the heat exchange structure.

[0018] Furthermore, since the liquid collector is connected to the liquid outlet pipe, the difficulty of connecting the heat exchange structure to the liquid outlet pipe is reduced, thus avoiding the need for multiple pipes to be connected to the liquid inlet pipe, and further reducing the manufacturing difficulty of the heat exchange structure.

[0019] Optionally, the heat exchange structure further includes a transition collector, and two first distributors are provided, both of which are connected to the transition collector, and the two first distributors are respectively connected to the inlet collector and the outlet collector.

[0020] By adopting the above technical solution, since both first fluid distributors are connected to the transition collector and the two first fluid distributors are connected to the inlet collector and the outlet collector respectively, the liquid entering the heat exchange structure through the inlet pipe first enters the inlet collector, then enters one of the first fluid distributors, the liquid in the first fluid distributor then enters the transition collector, then enters the other first fluid distributor, the liquid in the other first fluid distributor then enters the outlet collector, and finally the liquid entering the outlet collector returns to the heat dissipation pipe system through the outlet pipe, so as to realize the flow of liquid in the liquid cooling channel.

[0021] Since both first distributors are connected to the transition collector, the multiple liquids entering the transition collector via one of the first distributors will mix in the transition collector. The mixed liquids will then enter the outlet collector via the other first distributor, thereby keeping the temperature of the multiple liquids entering the other first distributor as consistent as possible. This improves the cooling effect of the first distributor on the gear oil, and further enhances the cooling effect of the heat exchange structure on the gear oil.

[0022] In addition, since both first fluid distributors are connected to the transition collector, the flow path of the liquid in the heat exchange structure can be increased, thereby extending the flow time of the liquid in the heat exchange structure. At the same time, the contact area between the heat exchange structure and the gear oil is increased, thereby improving the heat exchange effect between the liquid and the gear oil through the heat exchange structure, and further improving the cooling effect on the gear oil.

[0023] Optionally, at least two transition current collectors are provided, and the heat exchange structure further includes a second flow divider that connects two adjacent transition current collectors, the second flow divider having multiple second flow channels inside.

[0024] By adopting the above technical solution, since there are at least two transition current collectors, the heat exchange structure also includes a second distributor connecting the two adjacent transition current collectors. This allows the liquid entering one of the transition current collectors to enter the other transition current collector via the second distributor, thereby further increasing the flow path of the liquid in the heat exchange structure. This further extends the flow time of the liquid in the heat exchange structure and further increases the contact area between the heat exchange structure and the gear oil, thereby further improving the cooling effect on the gear oil.

[0025] Because the second fluid separator has multiple second flow channels inside, the contact area between the liquid and the second fluid separator is increased, thereby improving the heat exchange effect between the liquid and the gear through the second fluid separator, and further improving the cooling effect on the gear oil.

[0026] Optionally, the interior of the first flow divider is provided with at least one first baffle, which divides the interior space of the first flow divider into multiple first flow channels; And / or, the interior of the second flow divider is provided with at least one second baffle, and multiple second baffles divide the interior space of the second flow divider into multiple second flow channels.

[0027] By adopting the above technical solution, since the first baffle divides the internal space of the first fluid distributor into multiple first flow channels, the manufacturing difficulty of the first fluid distributor is reduced, thereby reducing the manufacturing difficulty of the heat exchange structure. At the same time, the first baffle can also be used to increase the structural strength of the first fluid distributor.

[0028] Since the second baffle divides the internal space of the second fluid distributor into multiple second flow channels, it reduces the manufacturing difficulty of the second fluid distributor, thereby reducing the manufacturing difficulty of the heat exchange structure. At the same time, the second baffle can also be used to increase the structural strength of the second fluid distributor.

[0029] Optionally, the protrusion is provided with a first through hole for the liquid outlet pipe to pass through, and the external thread of the liquid outlet pipe is connected to a first nut located at both ends of the first through hole, and a first sealing gasket is provided between the first nut and the protrusion. And / or, the protrusion is provided with a second through hole for the liquid inlet pipe to pass through, the external thread of the liquid inlet pipe is connected to a second nut located at both ends of the second through hole, and a second sealing gasket is provided between the second nut and the protrusion.

[0030] By adopting the above technical solution, since the external thread of the liquid outlet pipe is connected to the first nuts located at both ends of the first through hole, the liquid outlet pipe can be fixedly connected to the protrusion by the compression of the first nuts, thereby increasing the stability of the heat exchange structure; since the first sealing gasket is provided between the first nut and the protrusion, the first sealing gasket can be deformed and pressed against the protrusion and the first nut by the compression of the first nut, thereby ensuring the sealing between the liquid outlet pipe and the protrusion, so as to avoid the leakage of gear oil inside the reducer through the first through hole, thereby ensuring the sealing of the reducer.

[0031] Because the inlet pipe is externally threaded with second nuts located at both ends of the second through hole, the inlet pipe can be fixedly connected to the protrusion by the compression of the second nuts, thereby increasing the stability of the heat exchange structure. Furthermore, because a second sealing gasket is provided between the second nut and the protrusion, the second sealing gasket can be deformed and pressed against the protrusion and the second nut by the compression of the second nut, thereby ensuring the sealing between the outlet pipe and the protrusion and preventing the gear oil inside the reducer from leaking through the second through hole, thus ensuring the sealing performance of the reducer.

[0032] Optionally, the external thread of the outlet pipe is connected to a first nut, a first sealing gasket is provided between the first nut and the protrusion, and a first washer is provided between the first sealing gasket and the first nut. And / or, the inlet pipe is externally threaded with a second nut, a second sealing gasket is provided between the second nut and the protrusion, and a second washer is provided between the second sealing gasket and the second nut.

[0033] By adopting the above technical solution, since a first gasket is provided between the first sealing gasket and the first nut, the first nut and the first sealing gasket can be isolated by the first gasket, so as to avoid the first sealing gasket from twisting and deforming under the action of the first nut during the tightening of the first nut, thereby ensuring the sealing between the liquid outlet pipe and the protrusion.

[0034] Because a second gasket is provided between the second sealing gasket and the second nut, the second gasket can be used to isolate the second nut from the second sealing gasket, so as to prevent the second sealing gasket from twisting and deforming under the action of the second nut during the tightening of the second nut, thereby ensuring the sealing between the liquid inlet pipe and the protrusion.

[0035] Optionally, the protrusion has a connecting wall, which has an inner wall surface facing the heat exchange chamber and an outer wall surface opposite to the inner wall surface. The inner wall surface and the outer wall surface are arranged parallel to each other. The connecting wall is provided with a first through hole for the liquid outlet pipe to pass through and a second through hole for the liquid inlet pipe to pass through. The central axis of the first through hole and the central axis of the second through hole are both perpendicular to the inner wall surface.

[0036] By adopting the above technical solution, since the inner wall surface and the outer wall surface are arranged in parallel, and the central axis of the first through hole and the central axis of the second through hole are both perpendicular to the inner wall surface, the end faces of the first sealing gasket and the second sealing gasket located inside the protrusion facing the inner wall surface can completely contact the inner wall surface, and the end faces of the first sealing gasket and the second sealing gasket located outside the protrusion facing the outer wall surface can completely contact the outer wall surface, thereby increasing the contact area between the first sealing gasket and the second sealing gasket and the protrusion, and thus increasing the sealing performance between the liquid outlet pipe and the liquid inlet pipe and the protrusion.

[0037] Optionally, the lowest point of the heat exchange cavity relative to the horizontal plane is lower than the lowest point of the accommodating cavity relative to the horizontal plane; And / or, the protrusion is provided with heat dissipation ribs, which are located outside the protrusion.

[0038] By adopting the above technical solution, since the lowest point of the heat exchange chamber relative to the horizontal plane is lower than the lowest point of the receiving chamber relative to the horizontal plane, the gear oil flowing along the cavity wall of the receiving chamber can enter the heat exchange chamber. This allows the gear oil flowing along the cavity wall of the receiving chamber to mix with the relatively cool gear oil in the heat exchange chamber, thereby improving the cooling effect of the heat exchange structure on the gear oil. In addition, it also allows metal debris inside the reducer to settle on the bottom wall of the heat exchange chamber, reducing the phenomenon of metal debris coming into contact with the internal components of the reducer again along with the gear oil, thus ensuring the service life of the reducer.

[0039] Furthermore, since the protruding part is equipped with heat dissipation fins, which are located on the outside of the protruding part, the contact area between the reducer and the air can be further increased, thereby further increasing the cooling effect of the reducer by air cooling, and thus further increasing the heat dissipation effect of the reducer; at the same time, the heat dissipation fins can also be used to increase the structural strength of the housing, so as to improve the reducer's impact resistance.

[0040] This application also provides a vehicle to improve the heat dissipation of the reducer and reduce the vehicle's failure rate.

[0041] A vehicle comprising a speed reducer as described above.

[0042] By adopting the above technical solution, the vehicle in this application uses the aforementioned reducer, thereby improving the cooling effect of the gear oil. This prevents the gear oil inside the reducer from flowing to the outside of the reducer due to high-temperature expansion of the gear oil, and also avoids gear oil failure and oil seal aging caused by high-temperature gear oil, thereby reducing the vehicle's failure rate.

[0043] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. The reducer in this application includes a housing and a heat exchange structure. The housing has an internal cavity, and the bottom of the housing has a protrusion protruding outwards. The protrusion forms a heat exchange cavity communicating with the internal cavity. The heat exchange structure is located in the heat exchange cavity, and the internal part of the heat exchange structure has a liquid cooling channel capable of containing liquid. The heat exchange structure is provided with an inlet pipe extending out of the protrusion and an outlet pipe extending out of the protrusion. Both the inlet pipe and the outlet pipe are connected to the liquid cooling channel, thereby realizing the cooling of gear oil by liquid. At the same time, compared with the prior art where the liquid cooling channel is located in the wall of the reducer housing, the formation difficulty of the liquid cooling channel is reduced, thereby reducing the manufacturing difficulty of the reducer and reducing the production cost of the reducer. Furthermore, the heat exchange structure can avoid interference with the components in the internal cavity, so as to ensure the stable operation of the reducer.

[0044] 2. The heat exchange structure in this application includes an inlet collector connected to the inlet pipe, an outlet collector connected to the outlet pipe, and a first distributor connected to the inlet collector and the outlet collector. The first distributor has multiple first distribution channels inside, which increases the contact area between the liquid and the first distributor, thereby improving the heat exchange effect between the liquid and the gear oil through the first distributor, and further improving the cooling effect on the gear oil.

[0045] 3. The heat exchange structure in this application also includes a transition collector. There are two first distributors, both of which are connected to the transition collector and are respectively connected to the inlet collector and the outlet collector. This allows multiple liquids entering the transition collector via one of the first distributors to mix in the transition collector, so that the mixed liquids can then enter the outlet collector via the other first distributor. This ensures that the temperature of the multiple liquids entering the other first distributor is kept as consistent as possible, thereby improving the cooling effect of the first distributor on the gear oil and further improving the cooling effect of the heat exchange structure on the gear oil. Attached Figure Description

[0046] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the reducer described in one embodiment of this application; Figure 2 This is a schematic diagram of the reducer from another perspective in one embodiment of this application; Figure 3 This is a partial structural diagram of the speed reducer described in one embodiment of this application; Figure 4 This is a schematic diagram of the heat exchange structure described in one embodiment of this application; Figure 5 This is a schematic diagram of the heat exchange structure described in one embodiment of this application from another perspective; Figure 6 This is a schematic diagram of the heat exchange structure described in one embodiment of this application from another perspective. Figure 7 This is a cross-sectional view of the heat exchange structure described in one embodiment of this application.

[0047] Figure label: 1. Shell; 11. Receiving cavity; 12. Protrusion; 121. Heat exchange cavity; 122. Connecting wall; 123. Heat dissipation fin; 2. Heat exchange structure; 21. Liquid inlet collector; 211. Liquid inlet pipe; 212. Second nut; 213. Second gasket; 214. Quick connector; 22. Liquid outlet collector; 221. Liquid outlet pipe; 222. First nut; 223. First gasket; 23. First distributor; 231. First distributor channel; 24. Transition collector; 25. Second distributor; 3. Input shaft. Detailed Implementation

[0048] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0049] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0050] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0053] Reference Figures 1 to 7 A speed reducer is disclosed, which includes a housing 1 and a heat exchange structure 2. The housing 1 has an internal accommodating cavity 11, and the bottom of the housing 1 has a protrusion 12 protruding outward from the housing 1. The protrusion 12 forms a heat exchange cavity 121 communicating with the accommodating cavity 11. The heat exchange structure 2 is located in the heat exchange cavity 121, and the heat exchange structure 2 has a liquid cooling channel capable of accommodating liquid. The heat exchange structure 2 is provided with an inlet pipe 211 extending out of the protrusion 12 and an outlet pipe 221 extending out of the protrusion 12. Both the inlet pipe 211 and the outlet pipe 221 are connected to the liquid cooling channel.

[0054] Understandably, after the gear oil is added to the reducer, the gear oil is located in the heat exchange chamber 121 and the receiving chamber 11.

[0055] After the reducer of this application is installed on the vehicle, the cooling pipe system on the vehicle needs to be connected to the inlet pipe 211 and the outlet pipe 221 respectively, so that the liquid in the cooling pipe system can enter the liquid cooling channel inside the heat exchange structure 2 through the inlet pipe 211, and then the liquid flows in the liquid cooling channel and finally returns to the cooling pipe system through the outlet pipe 221.

[0056] Since the protrusion 12 forms a heat exchange chamber 121 that communicates with the accommodating cavity 11, and the heat exchange structure 2 is located in the heat exchange chamber 121, the gear oil in the accommodating cavity 11 can enter the heat exchange chamber 121 and contact the heat exchange structure 2. Thus, when the liquid flows in the liquid cooling channel, the liquid inside the liquid cooling channel can exchange heat with the gear oil inside the housing 1 through the heat exchange structure 2, so as to achieve cooling of the gear oil by the liquid.

[0057] Furthermore, since a liquid cooling channel is formed inside the heat exchange structure 2 and the heat exchange structure 2 is located in the heat exchange cavity 121, the difficulty of forming the liquid cooling channel is reduced compared to the prior art where the liquid cooling channel is located in the wall of the reducer housing 1. This reduces the difficulty of manufacturing the reducer and thus reduces the production cost of the reducer.

[0058] Furthermore, since the protrusion 12 is located at the bottom of the housing 1 and protrudes outward from the housing 1, a heat exchange cavity 121 is formed inside the protrusion 12. The heat exchange structure 2 is located in the heat exchange cavity 121, which allows the heat exchange structure 2 to avoid interfering with the components in the accommodating cavity 11, thereby ensuring the stable operation of the reducer.

[0059] Meanwhile, since the protrusion 12 is located at the bottom of the housing 1, and the interior of the protrusion 12 forms a heat exchange chamber 121 that communicates with the accommodating cavity 11, the heat exchange structure 2 can be completely immersed in the gear oil, thereby increasing the contact area between the heat exchange structure 2 and the gear oil. This greatly improves the cooling effect of the heat exchange structure 2 on the gear oil, thus avoiding leakage due to high temperature expansion of the gear oil caused by high-speed vehicle operation, as well as accelerated gear oil failure and oil seal aging, thereby ensuring the service life of the reducer.

[0060] Furthermore, since the protrusion 12 protrudes outward toward the housing 1, the contact area between the reducer and the air can be increased by the protrusion 12, thereby improving the heat dissipation effect of air cooling on the reducer, and further improving the heat dissipation effect of the reducer.

[0061] The better one is to refer to Figure 1 and Figure 2The reducer has an input shaft 3 and a half-shaft gear meshing and driving with the input shaft 3. The central axis of the input shaft 3 is set perpendicular to the central axis of the half-shaft gear. The reducer has a first direction parallel to the axial direction of the input shaft 3 and a second direction parallel to the axial direction of the half-shaft gear. The protrusion 12 protrudes outward from the housing 1 along the first and second directions.

[0062] This application does not impose specific limitations on the heat exchange structure 2, which can adopt any of the following embodiments: In this embodiment, the heat exchange structure 2 includes an inlet collector 21 connected to the inlet pipe 211, an outlet collector 22 connected to the outlet pipe 221, and a first distributor 23 connected to the inlet collector 21 and the outlet collector 22. The first distributor 23 has multiple first distribution channels 231 inside.

[0063] It is understood that the interiors of the liquid inlet collector 21 and the liquid outlet collector 22 are hollow, and one end of each first diversion channel 231 is connected to the liquid inlet collector 21, while the other end of each first diversion channel 231 is connected to the liquid outlet collector 22.

[0064] It should be noted that, in this embodiment, the internal space of the liquid inlet collector 21, the internal space of the liquid outlet collector 22, and the multiple first diversion channels 231 together constitute the liquid cooling channel.

[0065] When cooling the reducer, the liquid in the cooling pipe system enters the inlet collector 21 through the inlet pipe 211. The liquid in the inlet collector 21 then enters the first distributor 23, and then enters the outlet collector 22 through multiple first distribution channels 231 inside the first distributor 23. The liquid in the outlet collector 22 finally returns to the cooling pipe system through the outlet pipe 221.

[0066] Since the first distributor 23 has multiple first distribution channels 231 inside, the contact area between the liquid and the first distributor 23 is increased, thereby improving the heat exchange effect between the liquid and the gear oil through the first distributor 23, and further improving the cooling effect on the gear oil.

[0067] Furthermore, since the liquid inlet collector 21 is connected to the liquid inlet pipe 211, the difficulty of connecting the heat exchange structure 2 to the liquid inlet pipe 211 is reduced, thus avoiding the need for multiple pipes to be connected to the liquid inlet pipe 211, thereby reducing the manufacturing difficulty of the heat exchange structure 2.

[0068] Furthermore, since the liquid outlet collector 22 is connected to the liquid outlet pipe 221, the difficulty of connecting the heat exchange structure 2 and the liquid outlet pipe 221 is reduced, thus avoiding the need for multiple pipes to be connected to the liquid inlet pipe 211, thereby reducing the manufacturing difficulty of the heat exchange structure 2.

[0069] This application does not specifically limit the connection method between the first distributor 23 and the inlet collector 21 and the outlet collector 22. Preferably, the first distributor 23 is fixedly connected to the inlet collector 21 and the outlet collector 22 by welding to increase the connection stability between the first distributor 23 and the inlet collector 21 and the outlet collector 22. Both the inlet collector 21 and the outlet collector 22 are provided with multiple perforated structures corresponding to the multiple first distribution channels 231 to achieve communication between the first distribution channels 231 and the inlet collector 21 and the outlet collector 22. In other embodiments, the first distributor 23 can also be fixedly connected to the inlet collector 21 and the outlet collector 22 through a pipe joint.

[0070] In this embodiment, the shape of the first fluid distributor 23 is not specifically limited. Preferably, the first fluid distributor 23 is a flat plate structure to reduce the difficulty of manufacturing the first fluid distributor 23. In other embodiments, the first fluid distributor 23 can also be a structure with a cross-section of C-shaped, V-shaped, W-shaped, or other shapes.

[0071] This application does not specifically limit the formation of the first diversion channel 231. Preferably, the interior of the first diversion fluid 23 is provided with at least one first partition, and the multiple first partitions divide the interior space of the first diversion fluid 23 into multiple first diversion channels 231.

[0072] Since the first partition divides the internal space of the first fluid distributor 23 into multiple first flow channels 231, the manufacturing difficulty of the first fluid distributor 23 is reduced, thereby reducing the manufacturing difficulty of the heat exchange structure 2. At the same time, the first partition can also be used to increase the structural strength of the first fluid distributor 23.

[0073] This application does not specifically limit the structure and number of the first partition. Preferably, the first partition is a plate-like structure, and multiple first partitions are provided, which are arranged in parallel and spaced apart, so that the first fluid distributor 23 constitutes a harmonica tube, thereby further reducing the manufacturing difficulty of the first fluid distributor 23. In other embodiments, the first partition can also be a corrugated plate, and only one first partition is provided.

[0074] In other embodiments, the first distributor 23 is composed of multiple parallel and spaced tubes, and the internal space of each tube forms a first distribution channel to increase the contact area between the gear oil and the first distributor 23, thereby improving the cooling effect of the first distributor 23 on the gear oil.

[0075] Preferably, the inlet pipe 211 is fixedly connected to the inlet manifold 21 by welding to increase the connection stability between the inlet pipe 211 and the inlet manifold 21. The inlet manifold 21 is provided with a perforated structure corresponding to the inlet pipe 211 to achieve communication between the inlet pipe 211 and the inlet manifold 21. The outlet pipe 221 is fixedly connected to the outlet manifold 22 by welding to increase the connection stability between the outlet pipe 221 and the outlet manifold 22. The outlet manifold 22 is provided with a perforated structure corresponding to the outlet pipe 221 to achieve communication between the outlet pipe 221 and the outlet manifold 22.

[0076] In the second embodiment, the difference between this embodiment and the first embodiment is that the heat exchange structure 2 further includes a transition collector 24, and two first distributors 23 are provided. Both first distributors 23 are connected to the transition collector 24, and the two first distributors 23 are connected to the inlet collector 21 and the outlet collector 22, respectively.

[0077] It is understood that the transition collector 24 is hollow inside; one end of the plurality of first diversion channels 231 on one of the first diversion channels 23 is connected to the liquid inlet collector 21, and the other end of the plurality of first diversion channels 231 is connected to the transition collector 24; one end of the plurality of first diversion channels 231 on the other first diversion channel 23 is connected to the liquid outlet collector 22, and the other end of the plurality of first diversion channels 231 is connected to the transition collector 24.

[0078] It should be noted that, in this embodiment, the internal space of the transition current collector 24, the internal space of the inlet current collector 21, the internal space of the outlet current collector 22, and the multiple first diversion channels 231 together constitute the liquid cooling channel.

[0079] Since both first fluid distributors 23 are connected to the transition collector 24, and both first fluid distributors 23 are connected to the inlet collector 21 and the outlet collector 22 respectively, the liquid entering the heat exchange structure 2 through the inlet pipe 211 first enters the inlet collector 21, then enters one of the first fluid distributors 23, the liquid in the first fluid distributor 23 then enters the transition collector 24, then enters the other first fluid distributor 23, the liquid in the other first fluid distributor 23 then enters the outlet collector 22, and finally the liquid entering the outlet collector 22 returns to the heat dissipation pipe system through the outlet pipe 221, so as to realize the flow of liquid in the liquid cooling channel.

[0080] Since both first distributors 23 are connected to the transition collector 24, the multiple liquids entering the transition collector 24 via one of the first distributors 23 will mix in the transition collector 24. The mixed liquids will then enter the outlet collector 22 via the other first distributor 23, thereby keeping the temperature of the multiple liquids entering the other first distributor 23 as consistent as possible. This improves the cooling effect of the first distributor 23 on the gear oil, and further enhances the cooling effect of the heat exchange structure 2 on the gear oil.

[0081] In addition, since both first fluid distributors 23 are connected to the transition fluid collector 24, the flow path of the liquid in the heat exchange structure 2 can be increased, thereby extending the flow time of the liquid in the heat exchange structure 2. At the same time, the contact area between the heat exchange structure 2 and the gear oil is increased, thereby improving the heat exchange effect between the liquid and the gear oil through the heat exchange structure 2, and further improving the cooling effect on the gear oil.

[0082] Preferably, the inlet collector 21, the outlet collector 22, the transition collector 24, and the two first distributors 23 together form a V-shaped structure to improve the compactness of the heat exchange structure 2, thereby facilitating the miniaturization design of the reducer.

[0083] This application does not specifically limit the connection method between the first distributor 23 and the transition collector 24. Preferably, the first distributor 23 is fixedly connected to the transition collector 24 by welding to increase the connection stability between the first distributor 23 and the transition collector 24. Furthermore, the transition collector 24 is provided with multiple perforated structures corresponding to the multiple first distribution channels 231 to achieve communication between the transition collector 24 and the first distribution channels 231. In other embodiments, the first distributor 23 can also be fixedly connected to the transition collector 24 using a pipe joint.

[0084] Implementation method three differs from implementation method two in that, referring to... Figures 4 to 7 At least two transition current collectors 24 are provided. The heat exchange structure 2 also includes a second flow divider 25 that connects two adjacent transition current collectors 24. The interior of the second flow divider 25 has multiple second flow divider channels.

[0085] It is understood that two adjacent transition current collectors 24 are connected by multiple second diversion channels inside the second diversion channel 25, that is, one end of each second diversion channel is connected to one of the two adjacent transition current collectors 24, and the other end of each second diversion channel is connected to the other of the two adjacent transition current collectors 24.

[0086] It should be noted that, in this embodiment, the internal space of the transition current collector 24, the internal space of the liquid inlet current collector 21, the internal space of the liquid outlet current collector 22, the first diversion channel 231, and the second diversion channel together constitute the liquid cooling channel.

[0087] Since at least two transition current collectors 24 are provided, the heat exchange structure 2 also includes a second distributor 25 that connects two adjacent transition current collectors 24. This allows the liquid entering one of the transition current collectors 24 to enter the other transition current collector 24 via the second distributor 25, thereby further increasing the flow path of the liquid in the heat exchange structure 2. This further extends the flow time of the liquid in the heat exchange structure 2 and further increases the contact area between the heat exchange structure 2 and the gear oil, thereby further improving the cooling effect on the gear oil.

[0088] Since the second distributor 25 has multiple second distribution channels inside, the contact area between the liquid and the second distributor 25 is increased, thereby improving the heat exchange effect between the liquid and the gear through the second distributor 25, and further improving the cooling effect on the gear oil.

[0089] This application does not specifically limit the connection method between the second flow distributor 25 and the transition flow collector 24. Preferably, the second flow distributor 25 is fixedly connected to the transition flow collector 24 by welding to increase the connection stability between the second flow distributor 25 and the transition flow collector 24. Furthermore, the transition flow collector 24 is provided with multiple perforated structures corresponding to the multiple second flow distribution channels to achieve communication between the second flow distribution channels and the transition flow collector 24. In other embodiments, the second flow distributor 25 can also be fixedly connected to the transition flow collector 24 through a pipe joint.

[0090] In this embodiment, the number of transition current collectors 24 is not specifically limited; preferably, refer to... Figures 4 to 6 Two transition current collectors 24 are provided, and one second current collector 25 is provided between the two transition current collectors 24. The inlet current collector 21, the two second current collectors 25, the two transition current collectors 24, and the second current collector 25 together form a C-shaped structure. This improves the cooling effect of the heat exchange structure 2 on the gear oil while increasing the compactness of the heat exchange structure 2, thus facilitating the miniaturization design of the reducer. In other embodiments, three transition current collectors 24 can also be provided, and two second current collectors 25 are provided, each located between the three transition current collectors 24, so that the heat exchange structure 2 has a W-shaped structure, further improving the cooling effect of the heat exchange structure 2 on the gear oil.

[0091] This application does not specifically limit the formation of the second diversion channel. Preferably, the interior of the second diversion fluid 25 is provided with at least one second partition, which divides the interior space of the second diversion fluid 25 into multiple second diversion channels.

[0092] Since the second baffle divides the internal space of the second fluid distribution 25 into multiple second flow channels, the manufacturing difficulty of the second fluid distribution 25 is reduced, thereby reducing the manufacturing difficulty of the heat exchange structure 2. At the same time, the second baffle can also be used to increase the structural strength of the second fluid distribution 25.

[0093] This application does not specifically limit the structure and number of the second partition. Preferably, the second partition is a plate-like structure, and multiple second partitions are provided, which are arranged in parallel and spaced apart, so that the second fluid distributor 25 constitutes a harmonica tube, thereby further reducing the manufacturing difficulty of the second fluid distributor 25. In other embodiments, the second partition can also be a corrugated plate, and only one second partition is provided.

[0094] In other embodiments, the second fluid distributor 25 may also be a structure composed of multiple parallel and spaced tubes, the internal space of each tube forming a second distribution channel to increase the contact area between the second fluid distributor 25 and the gear oil, thereby increasing the cooling effect of the second fluid distributor 25 on the gear oil.

[0095] In other embodiments, the heat exchange structure 2 may also include a heat exchange tube, which may be C-shaped or have a coiled tube structure, in order to reduce the manufacturing cost of the heat exchange structure 2.

[0096] This application does not specifically limit the materials used to manufacture the heat exchange structure 2, the inlet pipe 211, and the outlet pipe 221. Preferably, all three are made of aluminum to improve the heat exchange efficiency between the heat exchange structure 2 and the gear oil, thereby further improving the cooling effect on the gear oil. In other embodiments, the heat exchange structure 2, the inlet pipe 211, and the outlet pipe 221 can also be made of other metal materials such as iron or copper.

[0097] This application does not limit the fixed connection method between the outlet pipe 221 and the protrusion 12. Preferably, refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The protrusion 12 is provided with a first through hole through which the liquid supply pipe 221 passes. The external thread of the liquid supply pipe 221 is connected to a first nut 222 located at both ends of the first through hole. A first sealing gasket is provided between the first nut 222 and the protrusion 12.

[0098] It is understood that there are two of the first nut 222 and the first sealing gasket. One of the first nut 222 and the first sealing gasket is located in the heat exchange chamber 121, and the other first nut 222 and the first sealing gasket are located outside the protrusion 12, and the first sealing gasket is sleeved on the outside of the liquid outlet pipe 221.

[0099] Since the external thread of the liquid outlet pipe 221 is connected to the first nut 222 located at both ends of the first through hole, the liquid outlet pipe 221 can be fixedly connected to the protrusion 12 by the compression of the protrusion 12 by the first nut 222, thereby increasing the stability of the heat exchange structure 2.

[0100] Furthermore, since a first sealing gasket is provided between the first nut 222 and the protrusion 12, the first sealing gasket can be deformed and pressed against the protrusion 12 and the first nut 222 by the compression of the first nut 222, so as to ensure the sealing between the liquid outlet pipe 221 and the protrusion 12, so as to prevent the gear oil inside the reducer from leaking through the first through hole, thereby ensuring the sealing of the reducer.

[0101] This application does not specifically limit the material used to manufacture the first sealing gasket. Preferably, the first sealing gasket is made of fluororubber to ensure its sealing performance. In other embodiments, the first sealing gasket may also be made of silicone rubber.

[0102] Furthermore, the external thread of the outlet pipe 221 is connected to a first nut 222, a first sealing gasket is provided between the first nut 222 and the protrusion 12, and a first gasket 223 is provided between the first sealing gasket and the first nut 222.

[0103] Understandably, the first gasket 223 is fitted onto the outside of the liquid outlet pipe 221.

[0104] Since a first gasket 223 is provided between the first sealing gasket and the first nut 222, the first nut 222 and the first sealing gasket can be isolated by the first gasket 223, so as to avoid the first sealing gasket from twisting and deforming under the action of the first nut 222 during the tightening of the first nut 222, thereby ensuring the sealing between the liquid outlet pipe 221 and the protrusion 12.

[0105] In other embodiments, the liquid outlet pipe 221 can also be fixedly connected to the protrusion 12 by welding to increase the connection stability between the liquid outlet pipe 221 and the protrusion 12 and to increase the sealing between the liquid outlet pipe 221 and the protrusion 12.

[0106] This application does not specify the method of fixing the liquid inlet pipe 211 to the protrusion 12. Preferably, refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The protrusion 12 is provided with a second through hole through which the liquid inlet pipe 211 passes. The external thread of the liquid inlet pipe 211 is connected to a second nut 212 located at both ends of the second through hole. A second sealing gasket is provided between the second nut 212 and the protrusion 12.

[0107] It is understood that there are two second nuts 212 and two second gaskets. One second nut 212 and one second gasket are located in the heat exchange chamber 121, and the other second nut 212 and second gasket are located outside the protrusion 12, and the second gasket is sleeved on the outside of the liquid inlet pipe 211.

[0108] Since the external thread of the liquid inlet pipe 211 is connected to the second nuts 212 located at both ends of the second through hole, the liquid inlet pipe 211 can be fixedly connected to the protrusion 12 by the compression of the protrusion 12 by the second nuts 212, thereby increasing the stability of the heat exchange structure 2.

[0109] Furthermore, since a second sealing gasket is provided between the second nut 212 and the protrusion 12, the second sealing gasket can be deformed and pressed against the protrusion 12 and the second nut 212 by the compression of the second nut 212, so as to ensure the sealing between the liquid outlet pipe 221 and the protrusion 12, so as to prevent the gear oil inside the reducer from leaking through the second through hole, thereby ensuring the sealing of the reducer.

[0110] This application does not specify the material for the second sealing gasket. Preferably, the second sealing gasket is made of fluororubber to ensure its sealing performance. In other embodiments, the second sealing gasket may also be made of silicone rubber.

[0111] Furthermore, the inlet pipe 211 is threadedly connected to a second nut 212, a second sealing gasket is provided between the second nut 212 and the protrusion 12, and a second gasket 213 is provided between the second sealing gasket and the second nut 212.

[0112] Understandably, the second gasket 213 is fitted onto the outside of the inlet pipe 211.

[0113] Since a second gasket 213 is provided between the second sealing gasket and the second nut 212, the second nut 212 and the second sealing gasket can be isolated by the second gasket 213, so as to avoid the second sealing gasket from twisting and deforming under the action of the second nut 212 during the tightening of the second nut 212, thereby ensuring the sealing between the liquid inlet pipe 211 and the protrusion 12.

[0114] In other embodiments, the inlet pipe 211 can also be fixedly connected to the protrusion 12 by welding to increase the connection stability between the inlet pipe 211 and the protrusion 12 and to increase the sealing between the inlet pipe 211 and the protrusion 12.

[0115] In a preferred embodiment, refer to Figures 4 to 6 The inlet pipe 211 and the outlet pipe 221 are both located on the same side of the heat exchange structure 2. This facilitates the installation of the heat exchange structure 2 and allows the heat dissipation piping system to be connected to the inlet pipe 211 and the outlet pipe 221.

[0116] In a preferred embodiment, refer to Figure 3 The protrusion 12 has a connecting wall 122, which has an inner wall surface facing the heat exchange chamber 121 and an outer wall surface opposite to the inner wall surface. The inner wall surface and the outer wall surface are arranged in parallel. The connecting wall 122 is provided with a first through hole through which the liquid outlet pipe 221 passes and a second through hole through which the liquid inlet pipe 211 passes. The central axis of the first through hole and the central axis of the second through hole are both perpendicular to the inner wall surface.

[0117] It is understood that the wall surface of the connecting wall 122 that is away from the heat exchange cavity 121 is the outer wall surface of the connecting wall 122, and both the inner and outer wall surfaces are planar.

[0118] Since the inner and outer wall surfaces are arranged parallel to each other, and the central axes of the first and second through holes are both perpendicular to the inner wall surface, the end faces of the first and second sealing gaskets located inside the protrusion 12 facing the inner wall surface can fully contact the inner wall surface, and the end faces of the first and second sealing gaskets located outside the protrusion 12 facing the outer wall surface can fully contact the outer wall surface, thereby increasing the contact area between the first and second sealing gaskets and the protrusion 12, and thus increasing the sealing performance between the liquid outlet pipe 221 and the liquid inlet pipe 211 and the protrusion 12.

[0119] In a preferred embodiment, the lowest point of the heat exchange cavity 121 relative to the horizontal plane is lower than the lowest point of the receiving cavity 11 relative to the horizontal plane.

[0120] It should be noted that the lowest point of the heat exchange chamber 121 relative to the horizontal plane is lower than the lowest point of the receiving chamber 11 relative to the horizontal plane, with reference to the vehicle equipped with the reducer of this application when it is stopped on the horizontal plane.

[0121] Since the lowest point of the heat exchange chamber 121 relative to the horizontal plane is lower than the lowest point of the receiving chamber 11 relative to the horizontal plane, the gear oil flowing along the cavity wall of the receiving chamber 11 can enter the heat exchange chamber 121, so that the gear oil flowing along the cavity wall of the receiving chamber 11 can mix with the relatively cool gear oil in the heat exchange chamber 121, thereby improving the cooling effect of the heat exchange structure 2 on the gear oil. In addition, it can also allow metal debris inside the reducer to settle at the bottom of the heat exchange chamber 121, thereby reducing the phenomenon of metal debris coming into contact with the internal components of the reducer again along with the gear oil, thus ensuring the service life of the reducer.

[0122] Preferably, the bottom wall of the heat exchange chamber 121 is flat to increase the volume of gear oil that can be contained in the heat exchange chamber 121, thereby further improving the cooling effect of the heat exchange structure 2 on the gear oil.

[0123] This application does not specifically limit the formation method in which the lowest point of the heat exchange cavity 121 relative to the horizontal plane is lower than the lowest point of the receiving cavity 11 relative to the horizontal plane. Preferably, refer to Figure 3 The wall thickness of the protrusion 12 is less than the wall thickness of the shell 1, and the outer contour of the protrusion 12 smoothly transitions with the outer contour of the shell 1, i.e., there is no step difference between the outer contour of the protrusion 12 and the outer contour of the shell 1, so that the lowest point of the heat exchange cavity 121 relative to the horizontal plane is lower than the lowest point of the receiving cavity 11 relative to the horizontal plane. In other embodiments, the protrusion 12 is provided to protrude towards the bottom of the shell 1, so that the lowest point of the heat exchange cavity 121 relative to the horizontal plane is also lower than the lowest point of the receiving cavity 11 relative to the horizontal plane.

[0124] This application does not specify the connection method between the liquid inlet pipe 211 and the liquid outlet pipe 221 and the heat dissipation piping system. Preferably, refer to Figures 4 to 6 Both the inlet pipe 211 and the outlet pipe 221 are equipped with quick connectors 214. These quick connectors 214 connect the inlet pipe 211 to the outlet branch of the heat dissipation piping system and the outlet pipe 221 to the return branch of the heat dissipation piping system, thereby improving the efficiency of connecting the heat dissipation piping system to the inlet pipe 211 and the outlet pipe 221. In other embodiments, the outlet branch of the heat dissipation piping system can be directly fitted onto the outside of the inlet pipe 211, and the return branch can be directly fitted onto the outside of the outlet pipe 221, thus connecting the inlet pipe 211 and the outlet pipe 221 to the heat dissipation piping system.

[0125] In a preferred embodiment, refer to Figure 1 and Figure 2The protrusion 12 is provided with heat dissipation ribs 123. The heat dissipation ribs 123 are located outside the protrusion 12, which can further increase the contact area between the reducer and the air, thereby further increasing the cooling effect of the reducer by air cooling, and further increasing the heat dissipation effect of the reducer; at the same time, the heat dissipation ribs 123 can also increase the structural strength of the housing 1 to improve the reducer's impact resistance.

[0126] The better one is to refer to Figure 1 and Figure 2 Multiple heat dissipation fins 123 are spaced apart to further increase the contact area between the reducer and the air, thereby further increasing the cooling effect of air cooling on the reducer, and also further increasing the structural strength of the housing 1.

[0127] This application also discloses a vehicle that includes the speed reducer as described above.

[0128] It is understandable that the vehicle has a cooling pipe system, with the inlet pipe 211 and the outlet pipe 221 connected to the outlet branch and return branch of the cooling pipe system, respectively.

[0129] Because the vehicle in this application uses the aforementioned reducer, the cooling effect on the gear oil is improved, thus preventing the gear oil inside the reducer from flowing to the outside of the reducer due to high temperature expansion. At the same time, it avoids gear oil failure and oil seal aging caused by high temperature, thereby reducing the vehicle's failure rate.

[0130] This application does not specifically limit the power source of the vehicle. It can be a pure electric vehicle powered by a battery pack, a gasoline vehicle powered by fuel, or a hybrid vehicle powered by both a battery pack and fuel. For a pure electric vehicle, the cooling piping system can be a piping system for cooling the motor or battery pack. For a gasoline vehicle, the cooling piping system can be a piping system for cooling the engine. For a hybrid vehicle, the cooling piping system can be a piping system for cooling the motor, battery pack, or engine.

[0131] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0132] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0133] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A speed reducer, characterized in that, The device includes a housing (1) and a heat exchange structure (2). The housing (1) has an internal cavity (11) and a protrusion (12) protruding outward from the bottom of the housing (1). The protrusion (12) forms a heat exchange cavity (121) that communicates with the internal cavity (11). The heat exchange structure (2) is located in the heat exchange cavity (121) and has a liquid cooling channel that can accommodate liquid. The heat exchange structure (2) is provided with an inlet pipe (211) extending out of the protrusion (12) and an outlet pipe (221) extending out of the protrusion (12). Both the inlet pipe (211) and the outlet pipe (221) are connected to the liquid cooling channel.

2. The speed reducer according to claim 1, characterized in that, The heat exchange structure (2) includes an inlet collector (21) connected to the inlet pipe (211), an outlet collector (22) connected to the outlet pipe (221), and a first distributor (23) connected to the inlet collector (21) and the outlet collector (22). The first distributor (23) has multiple first distribution channels (231) inside.

3. A speed reducer according to claim 2, characterized in that, The heat exchange structure (2) further includes a transition collector (24). There are two first distributors (23). Both first distributors (23) are connected to the transition collector (24), and the two first distributors (23) are connected to the inlet collector (21) and the outlet collector (22) respectively.

4. A speed reducer according to claim 3, characterized in that, At least two transition current collectors (24) are provided. The heat exchange structure (2) also includes a second flow divider (25) that connects two adjacent transition current collectors (24). The second flow divider (25) has multiple second flow divider channels inside.

5. A speed reducer according to claim 4, characterized in that, The first flow divider (23) has at least one first partition plate inside, which divides the internal space of the first flow divider (23) into multiple first flow divider channels (231). And / or, the interior of the second flow divider (25) is provided with at least one second baffle, which divides the interior space of the second flow divider (25) into a plurality of second flow channels.

6. A speed reducer according to any one of claims 1-5, characterized in that, The protrusion (12) is provided with a first through hole through which the liquid outlet pipe (221) passes. The external thread of the liquid outlet pipe (221) is connected to a first nut (222) located at both ends of the first through hole. A first sealing gasket is provided between the first nut (222) and the protrusion (12). And / or, the protrusion (12) is provided with a second through hole through which the liquid inlet pipe (211) passes, and the external thread of the liquid inlet pipe (211) is connected to a second nut (212) located at both ends of the second through hole, and a second sealing gasket is provided between the second nut (212) and the protrusion (12).

7. A speed reducer according to any one of claims 1-5, characterized in that, The external thread of the outlet pipe (221) is connected to a first nut (222), a first sealing gasket is provided between the first nut (222) and the protrusion (12), and a first gasket (223) is provided between the first sealing gasket and the first nut (222). And / or, the inlet pipe (211) is externally threaded with a second nut (212), a second sealing gasket is provided between the second nut (212) and the protrusion (12), and a second gasket (213) is provided between the second sealing gasket and the second nut (212).

8. A speed reducer according to any one of claims 1-5, characterized in that, The protrusion (12) has a connecting wall (122), which has an inner wall surface facing the heat exchange chamber (121) and an outer wall surface opposite to the inner wall surface. The inner wall surface and the outer wall surface are arranged in parallel. The connecting wall (122) is provided with a first through hole for the liquid outlet pipe (221) to pass through and a second through hole for the liquid inlet pipe (211) to pass through. The central axis of the first through hole and the central axis of the second through hole are both perpendicular to the inner wall surface.

9. The reducer according to any one of claims 1-5, characterized in that, The lowest point of the heat exchange chamber (121) relative to the horizontal plane is lower than the lowest point of the accommodating chamber (11) relative to the horizontal plane; And / or, the protrusion (12) is provided with heat dissipation ribs (123), the heat dissipation ribs (123) being located outside the protrusion (12).

10. A vehicle, characterized in that, Includes the speed reducer as described in any one of claims 1-9 above.

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