Speed reducer and vehicle

Abstract

The utility model provides a speed reducer and a vehicle, relates to the technical field of vehicles, the speed reducer comprises a shell, a water inlet, a water outlet and a cooling cavity are arranged on the wall body of the shell, the water inlet and the water outlet are respectively communicated with the cooling cavity, the water inlet is used for being communicated with a water outlet pipe of a whole vehicle cooling system, and the water outlet is used for being communicated with a water outlet pipe. The water outlet is used for being communicated with a water return pipe of a whole vehicle cooling system, a first cooling structure is arranged at the position, corresponding to the cooling cavity, of the inner wall of the shell, and the first cooling structure is used for absorbing heat of lubricating oil in the shell and transmitting the heat to the shell. Therefore, the speed reducer is cooled through the cooling liquid of the whole vehicle cooling system, the number of parts of the speed reducer cooling system is reduced, the production cost is reduced, meanwhile, the first cooling structure is arranged on the inner side of the shell, the cooling effect is improved, and the speed reducer can meet the heat dissipation requirement of the speed reducer under the limiting working condition.

Description

Technical Field

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

[0002] As competition in the new energy electric vehicle market becomes increasingly fierce, the performance requirements of various OEMs for the entire vehicle are also getting higher and higher. As the heart of new energy electric vehicles, the electric drive system has been constantly updated with performance parameters. Especially at a time when cost competition is fierce, how to meet the additional functions required by customers within a limited cost range has become a difficult point in the research and development of electric drive systems. Among them, the reducer, as one of the important components of the electric drive system, is usually equipped with a cooling system to dissipate heat during the operation of the reducer. Under the background of high-speed requirements, how to reduce the BOM (Bill of Materials) cost of the reducer cooling system while meeting the heat dissipation requirements has become an important topic in the research and development of electric drive systems.

[0003] At present, the traditional reducer cooling system is mainly composed of a suction filter, an oil inlet channel, an oil pump, an oil cooler, an oil return channel and an oil storage chamber. It not only has a complex structure, many parts and high production cost, but also has limited heat dissipation capacity. It can usually only meet the heat dissipation requirements of the reducer under medium and low speed conditions (i.e., normal conditions), but cannot meet the heat dissipation requirements of the reducer under high speed conditions (i.e., extreme conditions). Utility Model Content

[0004] The problem solved by the utility model is: how to make the reducer cooling system meet the heat dissipation demand of the reducer under extreme working conditions while ensuring low production cost.

[0005] In order to solve the above problems, the utility model provides a reducer and a vehicle.

[0006] In the first aspect, the utility model provides a reducer, including a shell, a cooling cavity, a water inlet and a water outlet are provided on the wall of the shell, the water inlet and the water outlet are respectively connected to the cooling cavity, the water inlet is used to connect with the water outlet pipe of the whole vehicle cooling system, the water outlet is used to connect with the return pipe of the whole vehicle cooling system, and a first cooling structure is provided at a position corresponding to the cooling cavity on the inner wall of the shell, the first cooling structure is used to absorb the heat of the lubricating oil inside the shell and transfer it to the shell.

[0007] Optionally, the reducer further comprises a sealing cover plate, an outer wall of the shell is provided with a receiving groove, the sealing cover plate is arranged at the receiving groove and is sealedly connected to the shell to enclose the receiving groove to form the cooling cavity.

[0008] Optionally, the sealing cover plate is located at the lower end of the shell and is tilted obliquely downward.

[0009] Optionally, the sealing cover plate is welded to the shell.

[0010] Optionally, a partition is provided in the cooling cavity, the partition divides the cooling cavity into a plurality of coolant channels, the plurality of coolant channels are connected in sequence, and the water inlet and the water outlet are respectively connected to two coolant channels located at both ends.

[0011] Optionally, the cooling chamber includes a first chamber wall and a second chamber wall that are arranged opposite to each other, the water inlet and the water outlet are respectively arranged on the first chamber wall, and one end of the partition is connected to the first chamber wall, and the other end of the partition extends to the second chamber wall and is spaced apart from the second chamber wall to separate the cooling chamber into two coolant channels.

[0012] Optionally, a protrusion structure is provided on the partition, and the protrusion structure is provided on the side of the partition located in the channel structure.

[0013] Optionally, the first cooling structure includes a plurality of heat dissipation fins, and the plurality of heat dissipation fins are arranged at intervals along the circumference of the shell.

[0014] Optionally, a second cooling structure is provided in the cooling cavity, and the second cooling structure includes a plurality of heat dissipation columns, and the plurality of heat dissipation columns are distributed in a plurality of rows and columns in the cooling cavity, and the heat dissipation columns in two adjacent rows or two adjacent columns are staggered.

[0015] In a second aspect, the utility model provides a vehicle, comprising the reducer as described above.

[0016] The beneficial effect of the reducer of the utility model is that a water inlet, a water outlet and a cooling cavity can be set on the wall of the reducer housing, and the water inlet and the water outlet are connected to the cooling cavity respectively. At the same time, the water inlet is connected to, for example, a water outlet pipe of the whole vehicle cooling system, and the water outlet is connected to, for example, a water return pipe of the whole vehicle cooling system, so that the reducer is connected to the whole vehicle cooling system, so that the coolant of the whole vehicle cooling system can flow into the housing of the reducer from the water inlet, flow in the cooling cavity, and take away the heat of the reducer, and then flow back from the water outlet to the water return pipe of the whole vehicle cooling system, so as to achieve the use of the coolant of the whole vehicle cooling system to cool the reducer. In this way, the setting of components such as oil pumps and oil coolers can be omitted, which can not only reduce the number of components of the reducer cooling system, achieve the purpose of reducing production costs, but also reduce the occupied space of the entire reducer, making the structure of the reducer more compact and convenient for layout. Moreover, by arranging a first cooling structure at a position corresponding to the cooling cavity on the inner wall of the shell, the heat of the lubricating oil inside the shell can be absorbed by the first cooling structure and transferred to the shell at a position corresponding to the cooling cavity, so that the coolant in the cooling cavity can take away more heat, thereby improving the cooling effect of the reducer, and further making the reducer not only meet the heat dissipation requirements of the reducer under normal working conditions, but also meet the heat dissipation requirements of the reducer under extreme working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of the reducer housing in the embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of the reducer housing in the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the reducer housing in another perspective in the embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the local structure of the first cooling structure provided on the inner side of the reducer housing in the embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the partition in the embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. Shell; 11. Water inlet; 12. Water outlet; 13. Cooling chamber; 131. First coolant channel; 132. Second coolant channel; 14. Receiving groove; 15. Partition; 151. Protruding structure; 16. First cooling structure; 17. Second cooling structure; 2. Sealing cover plate; 3. Water inlet joint; 4. Water outlet joint. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. Although some embodiments of the utility model are shown in the accompanying drawings, it should be understood that the utility model can be implemented in various forms and should not be interpreted as being limited to the embodiments described here. On the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for exemplary purposes and are not used to limit the scope of protection of the utility model.

[0025] The Z axis in the accompanying drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the accompanying drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the accompanying drawings represents the left and right positions, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] The term "including" and its variations used in this article are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0027] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0028] In the related art, the reducer of the electric drive system is usually cooled by oil cooling, that is, by setting oil cooling components such as an oil pump, an oil cooler, an oil inlet channel, an oil return channel and an oil storage chamber on the housing of the reducer, and using an oil pump to pump the lubricating oil in the reducer through the oil inlet channel to the oil cooler, and then flow back to the housing of the reducer from the oil return channel after being cooled by the oil cooler. However, this cooling method not only makes the overall structure of the reducer complex, with more parts and high production costs, but also has limited heat dissipation capacity. It can usually only meet the heat dissipation requirements of the reducer under medium and low speed conditions (i.e., normal conditions), but cannot meet the heat dissipation requirements of the reducer under high speed conditions (i.e., extreme conditions).

[0029] In view of the problems existing in the above-mentioned related technologies, the utility model provides a reducer and a vehicle.

[0030] Combination Figure 1 and Figure 2 As shown, a reducer provided by an embodiment of the utility model includes a shell 1, a water inlet 11, a water outlet 12 and a cooling chamber 13 are provided on the wall of the shell 1, the water inlet 11 and the water outlet 12 are respectively connected to the cooling chamber 13, the water inlet 11 is used to be connected to the water outlet pipe of the whole vehicle cooling system, the water outlet 12 is used to be connected to the return pipe of the whole vehicle cooling system, and a first cooling structure 16 is provided at a position corresponding to the cooling chamber 13 on the inner wall of the shell 1, and the first cooling structure 16 is used to absorb the heat of the lubricating oil inside the shell 1 and transfer it to the shell 1.

[0031] Specifically, the cooling cavity 13 is usually arranged on the wall of the housing 1 and is not connected to the internal space of the housing 1, wherein the internal space of the housing 1 refers to the space surrounded by the inner wall of the housing 1. The first cooling structure 16 is arranged in the internal space of the housing 1, specifically, at a position on the inner wall of the housing 1 corresponding to the cooling cavity 13. The cooling cavity 13 is arranged on the wall of the shell 1, which can be understood as machining the cooling cavity 13 on the shell wall of the shell 1 with a certain thickness, so that the cooling cavity 13 is located between the outer wall and the inner wall of the shell 1. At this time, if a second cooling structure 17 is arranged in the cooling cavity 13, the second cooling structure 17 can be arranged on the cavity wall shared by the cooling cavity 13 and the outer wall of the shell 1, or on the cavity wall shared by the cooling cavity 13 and the inner wall of the shell 1, or on both of the two cavity walls; the cooling cavity 13 is arranged on the wall of the shell 1, which can also be understood as machining, for example, a receiving groove 14 on the outer wall of the shell 1, and sealing with a sealing cover plate 2 (described later), so that the shell 1 and the sealing cover plate 2 are combined to form the cooling cavity 13. At this time, if a second cooling structure 17 is arranged in the cooling cavity 13, the second cooling structure 17 can be arranged on the sealing cover plate 2, or on the outer wall of the shell 1, or on both the outer wall of the shell 1 and the sealing cover plate 2. In practical applications, the design can be selected according to the structure of the shell 1, and no specific limitation is made here. The water inlet 11 and the water outlet 12 are usually arranged on the outer wall of the housing 1 at the cooling cavity 13, and penetrate the cavity wall on one side of the cooling cavity 13, so that the water inlet 11 and the water outlet 12 are respectively connected to the cooling cavity 13. During cooling, the water outlet pipe of the vehicle cooling system can be connected to the water inlet 11, and the water return pipe of the vehicle cooling system can be connected to the water outlet 12, so that the reducer is connected to the vehicle cooling system, so that the coolant of the vehicle cooling system can flow from the water inlet 11 into the housing 1 of the reducer and then flow in the cooling cavity 13 to take away the heat transferred from the reducer lubricating oil to the housing 1 through the first cooling structure 16, and then flow back from the water outlet 12 to the water return pipe of the vehicle cooling system.

[0032] The reducer in this embodiment can be provided with a water inlet 11, a water outlet 12 and a cooling cavity 13 on the wall of the reducer housing 1, and the water inlet 11 and the water outlet 12 are connected to the cooling cavity 13 respectively, and at the same time, the water inlet 11 is connected to, for example, a water outlet pipe of the whole vehicle cooling system, and the water outlet 12 is connected to, for example, a water return pipe of the whole vehicle cooling system, so that the reducer is connected to the whole vehicle cooling system, so that the coolant of the whole vehicle cooling system can flow into the reducer housing 1 from the water inlet 11, flow in the cooling cavity 13, and take away the heat of the reducer, and then flow back to the water return pipe of the whole vehicle cooling system from the water outlet 12, so as to realize the use of the coolant of the whole vehicle cooling system to cool the reducer. In this way, the setting of components such as oil pumps and oil coolers can be omitted, which can not only reduce the number of components of the reducer cooling system, achieve the purpose of reducing production costs, but also reduce the occupied space of the entire reducer, making the structure of the reducer more compact and convenient for layout. Moreover, by setting a first cooling structure 16 at a position corresponding to the cooling chamber 13 on the inner wall of the shell 1, the first cooling structure 16 can be used to absorb the heat of the lubricating oil inside the shell 1 and transfer it to the shell 1 at a position corresponding to the cooling chamber 13, so that the coolant in the cooling chamber 13 can take away more heat, thereby improving the cooling effect of the reducer, and further enabling the reducer to not only meet the heat dissipation requirements of the reducer under normal working conditions, but also meet the heat dissipation requirements of the reducer under extreme working conditions.

[0033] Furthermore, combined with Figure 3 As shown, a water inlet joint 3 is provided at the water inlet 11, and the water inlet joint 3 is used to communicate with the water outlet pipe of the vehicle cooling system, and a water outlet joint 4 is provided at the water outlet 12, and the water outlet joint 4 is used to communicate with the water return pipe of the vehicle cooling system. Such an arrangement can realize the connection between the reducer and the water outlet pipe of the vehicle cooling system and the water return pipe of the vehicle cooling system, and make the connection operation of the cooling pipeline simple and convenient.

[0034] Optionally, combined Figure 1 and Figure 2 As shown, the reducer further includes a sealing cover plate 2 , an outer wall of the housing 1 is provided with a receiving groove 14 , the sealing cover plate 2 is arranged at the receiving groove 14 and is sealedly connected to the housing 1 to enclose the receiving groove 14 to form a cooling chamber 13 .

[0035] In this optional embodiment, the sealing cover plate 2 and the housing 1 are independent parts, which can be produced separately and then assembled into the housing structure of the reducer. The receiving groove 14 is usually set at the bottom of the housing 1 or near the bottom of the housing 1, and the sealing cover plate 2 is usually set at the notch of the receiving groove 14, and the sealing cover plate 2 is sealed and connected to the housing 1 to form a cooling cavity 13. Among them, the sealing cover plate 2 and the housing 1 can be connected and sealed by welding, or by bolts and sealing rings, which are not specifically limited here. In this way, compared with the method of directly processing the cooling cavity 13 on the shell wall of the reducer housing 1, by setting the receiving groove 14 on the outer wall of the housing 1 and using the sealing cover plate 2 to seal the receiving groove 14 to form the cooling cavity 13, not only the processing difficulty of the cooling cavity 13 can be reduced, but also the structure of the production mold of the housing 1 can be simplified, thereby reducing the mold cost and improving production efficiency.

[0036] Optionally, combined Figure 1 As shown, the sealing cover plate 2 is located at the lower end of the housing 1 and is tilted downward.

[0037] In this optional embodiment, the sealing cover plate 2 is arranged at the lower end of the shell 1 and is inclined downward, so that the cooling chamber 13 is also roughly inclined, and the water inlet 11 and the water outlet 12 are usually arranged at the lower end of the cooling chamber 13, so that the cooling pipeline connected to the water inlet 11 and the water outlet 12 can be arranged below the shell 1 to facilitate the arrangement of the cooling pipeline; and, compared with the horizontal arrangement of the sealing cover plate 2, the sealing cover plate 2 is inclined downward, which can reduce the horizontal size of the lower end of the reducer, thereby reducing the space occupied by the lower end of the reducer, so as to facilitate the arrangement of the reducer in a limited space.

[0038] Optionally, combined Figure 3 As shown, the sealing cover plate 2 is welded to the housing 1 .

[0039] In this optional embodiment, the sealing cover plate 2 and the housing 1 are usually connected and sealed by friction welding, which not only has high assembly efficiency but also reduces the use of components such as bolts and sealing rings, thereby further reducing the manufacturing cost of the reducer.

[0040] Optionally, combined Figure 3 As shown, a partition 15 is provided in the cooling chamber 13, and the partition 15 divides the cooling chamber 13 into a plurality of coolant channels, and the plurality of coolant channels are connected in sequence, and the water inlet 11 and the water outlet 12 are respectively connected to the two coolant channels located at the two ends.

[0041] In this optional embodiment, the partition 15 can be arranged on the side of the sealing cover plate 2 facing the receiving groove 14, or can be arranged at the bottom of the receiving groove 14, so that the partition 15 can form an integrated structure with the sealing cover plate 2, or can form an integrated structure with the housing 1, such as Figure 3 As shown. In actual applications, the design can be selected as needed and is not specifically limited here. Moreover, the partition 15 divides the cooling chamber 13 into a plurality of coolant channels, and the plurality of coolant channels are sequentially connected to form a tortuous channel structure, and the water inlet 11 and the water outlet 12 are respectively connected to the two coolant channels located at the two ends of the tortuous channel structure. At this time, if a second cooling structure 17 is provided in the cooling chamber 13, the second cooling structure 17 can be provided in at least one of the plurality of coolant channels. Among them, one or more partitions 15 can be provided. For example, when a partition 15 is provided, the cooling chamber 13 is usually divided into two coolant channels by this partition 15, such as Figure 3 As shown; when multiple partitions 15 are provided, the cooling chamber 13 is usually divided into at least three coolant channels by the multiple partitions 15, and the formed zigzag channel structure is roughly a "snake-shaped" structure. In this way, by providing partitions 15 in the cooling chamber 13, and making the partitions 15 divide the cooling chamber 13 into multiple coolant channels that are connected in sequence, the coolant is guided by the inner wall of the coolant channel, thereby improving the fluidity of the coolant in the cooling chamber 13, increasing the heat exchange area, and thus improving the cooling effect.

[0042] Optionally, combined Figure 3 As shown, the cooling chamber 13 includes a first chamber wall and a second chamber wall that are arranged opposite to each other, the water inlet 11 and the water outlet 12 are respectively arranged on the first chamber wall, and one end of the partition 15 is connected to the first chamber wall, and the other end of the partition 15 extends to the second chamber wall and is spaced apart from the second chamber wall to separate the cooling chamber 13 into two coolant channels.

[0043] In this optional embodiment, the water inlet 11 and the water outlet 12 are arranged on the cavity wall on the same side of the cooling cavity 13, that is, both are arranged on the first cavity wall of the cooling cavity 13, and a partition 15 is provided in the cooling cavity 13, one end of the partition 15 is connected to the first cavity wall of the cooling cavity 13, and the other end of the partition 15 extends from the first cavity wall to the second cavity wall of the cooling cavity 13 to a position close to the second cavity wall of the cooling cavity 13, so that the partition 15 divides the cooling cavity 13 into two coolant channels, namely the first coolant channel 131 and the second coolant channel 132, wherein the first coolant channel 13 One end of the first coolant channel 131 and one end of the second coolant channel 132 are connected to the water inlet 11 and the water outlet 12 respectively, and the other end of the first coolant channel 131 and the other end of the second coolant channel 132 are connected to each other, so that the first coolant channel 131 and the second coolant channel 132 form the tortuous channel structure; at this time, if a second cooling structure 17 is provided in the cooling cavity 13, the second cooling structure 17 can be arranged in the first coolant channel 131, can also be arranged in the second coolant channel 132, and can also be arranged in the first coolant channel 131 and the second coolant channel 132, such as Figure 3 As shown, no specific limitation is given here.

[0044] Thus, compared with setting the water inlet 11 and the water outlet 12 on the cavity wall on different sides of the cooling cavity 13, setting the water inlet 11 and the water outlet 12 on the cavity wall on the same side of the cooling cavity 13 can facilitate the layout of the cooling pipeline on the one hand, and can reduce the size of the reducer in the cooling cavity 13 after the reducer is connected to the cooling pipeline on the other hand, thereby reducing the overall volume of the reducer after the reducer is connected to the cooling pipeline, and thus facilitating the layout. Moreover, by setting a partition 15 in the cooling cavity 13 to avoid occupying more space in the cooling cavity 13 when multiple partitions 15 are set, it can not only ensure that the cooling cavity 13 can accommodate more coolant to cool the reducer housing 1 and improve the cooling effect, but also provide more setting space for the second cooling structure 17 when the second cooling structure 17 is set in the cooling cavity 13. In addition, by connecting one end of the partition 15 to the first cavity wall of the cooling cavity 13, and extending the other end of the partition 15 along the direction from the first cavity wall to the second cavity wall of the cooling cavity 13 to a position close to the second cavity wall of the cooling cavity 13, after the coolant enters the first coolant channel 131 of the cooling cavity 13 from the water inlet 11, it can flow from one end of the partition 15 to the other end of the partition 15 under the action of the partition 15, and enter the second coolant channel 132, and then flow from the other end of the partition 15 to one end of the partition 15 in the second coolant channel 132, so that the partition 15 has a guiding effect, so as to further improve the fluidity of the coolant in the cooling cavity 13, thereby further improving the cooling effect.

[0045] Optionally, combined Figure 3 and Figure 5As shown, a protruding structure 151 is provided on the partition 15 , and the protruding structure 151 is provided on the side surface of the partition 15 located in the coolant channel.

[0046] In this optional embodiment, the protruding structure 151 generally extends from one end of the partition 15 toward the sealing cover plate 2 to the end of the partition 15 away from the sealing cover plate 2, and the protruding structure 151 can be arranged on the side of the partition 15 located in the coolant channel, for example Figure 5 As shown, the side of the partition 15 located in the first coolant channel 131, the side of the partition 15 located in the second coolant channel 132, and the side of the partition 15 located at the connection between the first coolant channel 131 and the second coolant channel 132 are all provided with a protruding structure 151. In addition, the side of the partition 15 located in the channel structure is usually provided with a plurality of protruding structures 151, and these plurality of protruding structures 151 are arranged at intervals along the extension direction of the partition 15, so that the side of the partition 15 located in the coolant channel is roughly in a wavy structure. In this way, the contact area between the partition 15 and the coolant can be increased, thereby improving the cooling effect of the coolant on the reducer.

[0047] Optionally, combined Figure 1 and Figure 4 As shown, the first cooling structure 16 includes a plurality of heat dissipation fins, and the plurality of heat dissipation fins are arranged at intervals along the circumference of the housing 1 .

[0048] In this optional embodiment, the inner wall of the shell 1 is usually surrounded by a cylindrical cavity structure, and the circumferential direction of the shell 1 can be understood as the circumference of the cylindrical cavity structure, and a plurality of heat dissipation fins are usually arranged at the open end of the shell 1. In this way, by setting the first cooling structure 16 as a heat dissipation fin and arranging a plurality of heat dissipation fins on the inner wall of the shell 1, the contact area between the first cooling structure 16 and the lubricating oil in the shell 1 is increased, so that more heat of the lubricating oil is transferred to the shell 1 and to the coolant in the cooling cavity 13, thereby improving the cooling effect, and by arranging a plurality of heat dissipation fins at intervals along the circumference of the shell 1, it is convenient to demold the shell 1 at the first cooling structure 16 during the production of the shell 1, thereby improving the convenience of processing and manufacturing.

[0049] Optionally, combined Figure 3 As shown, a second cooling structure 17 is provided in the cooling cavity 13. The second cooling structure 17 includes a plurality of heat dissipation columns. The plurality of heat dissipation columns are distributed in a plurality of rows and columns in the cooling cavity 13, and the heat dissipation columns in two adjacent rows or columns are staggered.

[0050] In this optional embodiment, the second cooling structure 17 is disposed in the cooling cavity 13 and is used to transfer the heat of the housing 1 to the coolant in the cooling cavity 13. Moreover, the second cooling structure 17 can be a heat dissipation column (such as Figure 3As shown), a heat dissipation column may be provided on the sealing cover plate 2, or a heat dissipation column may be provided on the bottom of the receiving groove 14 and the sealing cover plate 2 respectively. No specific limitation is made here, and the design can be selected according to the needs in actual application. In this way, by setting the second cooling structure 17 as a heat dissipation column, the structure of the second cooling structure 17 is simplified, and processing and manufacturing are convenient; moreover, by distributing a plurality of heat dissipation columns in multiple rows and columns in the cooling cavity 13, and distributing the heat dissipation columns of two adjacent rows or two adjacent columns in a staggered manner, the flow range of the coolant in the cooling cavity 13 is increased, and at the same time, the contact area between the second cooling structure 17 and the coolant can be increased, so that more heat absorbed by the second cooling structure 17 is transferred to the coolant, thereby improving the cooling effect.

[0051] A vehicle provided by an embodiment of the utility model includes the reducer as described above.

[0052] The beneficial effects of the vehicle of this embodiment relative to the prior art are the same as those of the above-mentioned reducer, which will not be described again here.

[0053] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A reducer, characterized in that: The invention comprises a shell (1), wherein a cooling cavity (13), a water inlet (11) and a water outlet (12) are provided on the wall of the shell (1), wherein the water inlet (11) and the water outlet (12) are respectively connected to the cooling cavity (13), wherein the water inlet (11) is used to be connected to a water outlet pipe of a whole vehicle cooling system, and the water outlet (12) is used to be connected to a water return pipe of the whole vehicle cooling system, and wherein a first cooling structure (16) is provided at a position on the inner wall of the shell (1) corresponding to the cooling cavity (13), wherein the first cooling structure (16) is used to absorb heat from lubricating oil inside the shell (1) and transfer the heat to the shell (1).

2. The reducer according to claim 1, characterized in that: It also comprises a sealing cover plate (2); the outer wall of the shell (1) is provided with a receiving groove (14); the sealing cover plate (2) is arranged at the receiving groove (14) and is sealedly connected to the shell (1) so as to enclose the receiving groove (14) to form the cooling cavity (13).

3. The reducer according to claim 2, characterized in that: The sealing cover plate (2) is located at the lower end of the shell (1) and is tilted downward.

4. The reducer according to claim 2, characterized in that: The sealing cover plate (2) is welded to the shell (1).

5. The reducer according to claim 1, characterized in that: A partition (15) is provided in the cooling chamber (13), and the partition (15) divides the cooling chamber (13) into a plurality of cooling liquid channels, and the plurality of cooling liquid channels are connected in sequence, and the water inlet (11) and the water outlet (12) are respectively connected to the two cooling liquid channels located at the two ends.

6. The reducer according to claim 5, characterized in that: The cooling chamber (13) comprises a first chamber wall and a second chamber wall which are arranged opposite to each other, the water inlet (11) and the water outlet (12) are respectively arranged on the first chamber wall, and one end of the partition (15) is connected to the first chamber wall, and the other end of the partition (15) extends to the second chamber wall and is spaced apart from the second chamber wall, so as to separate the cooling chamber (13) into two cooling liquid channels.

7. The reducer according to claim 5, characterized in that: The partition plate (15) is provided with a protruding structure (151), and the protruding structure (151) is arranged on the side surface of the partition plate (15) located in the coolant channel.

8. The reducer according to claim 1, characterized in that: The first cooling structure (16) comprises a plurality of heat dissipation fins, and the plurality of heat dissipation fins are arranged at intervals along the circumference of the housing (1).

9. The reducer according to claim 1, characterized in that: A second cooling structure (17) is provided in the cooling cavity (13), and the second cooling structure (17) comprises a plurality of heat dissipation columns, wherein the plurality of heat dissipation columns are distributed in a plurality of rows and columns in the cooling cavity (13), and the heat dissipation columns in two adjacent rows or columns are staggered.

10. A vehicle, characterized in that: Comprising a reducer as described in any one of claims 1-9.

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