Cooling device, reducer and vehicle

Abstract

The present application discloses a cooling device, a reducer and a vehicle. A cavity is formed in the cooling device; a cooling channel connected to the cavity is arranged on the cooling device; the cooling channel includes a first cooling channel and a second cooling channel connected to each other; the first cooling channel and the second cooling channel extend in the vertical direction of the cooling device; and the first cooling channel is arranged toward a cold source, and the second cooling channel is arranged away from the cold source; a flow direction control valve is arranged on the first cooling channel to control the first cooling channel to be connected to the cavity, so that the coolant in the cooling device circulates in the cavity and the cooling channel.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more specifically, to a cooling device, a reducer and a vehicle. Background Art

[0002] The reducer is a deceleration and torque-increasing device in the automobile transmission system. The use of the reducer can meet the conditions of the same total transmission ratio, so that the load of the transmission, drive shaft, main reducer, differential, half-axle and other components is reduced, the size is reduced, and the drive axle has a larger ground clearance. It is widely used in heavy-duty trucks, large buses, off-road vehicles and some other large industrial and mining vehicles.

[0003] When the reducer is in use, a large amount of heat will be generated due to factors such as friction between the gears in the reduction mechanism. The existing reducer has poor heat dissipation effect, which is very likely to cause heat accumulation in the reducer, thereby damaging the internal components of the reducer and affecting the service life of the reducer. Summary of the invention

[0004] An object of the present application is to provide a new technical solution for a cooling device, a reducer and a vehicle.

[0005] According to a first aspect of an embodiment of the present application, a cooling device is provided. A cavity is formed in the cooling device;

[0006] The cooling device is provided with a cooling channel connected to the cavity;

[0007] The cooling channel comprises a first cooling channel and a second cooling channel which are interconnected;

[0008] The first cooling channel and the second cooling channel extend in the vertical direction of the cooling device; the first cooling channel is arranged toward the cooling source, and the second cooling channel is arranged away from the cooling source;

[0009] The first cooling channel is provided with a flow direction control valve, and the flow direction control valve is used to control the first cooling channel to be connected with the cavity, so that the cooling liquid in the cooling device circulates in the cavity and the cooling channel.

[0010] Optionally, along the horizontal direction of the cooling device, the first cooling channel has a first size, and the second cooling channel has a second size; the first size is larger than the second size.

[0011] Optionally, the flow direction control valve includes a valve; a liquid outlet is provided on the first cooling flow channel, and the valve is adapted to the liquid outlet to open or close the liquid outlet.

[0012] Optionally, the flow direction control valve further comprises an elastic portion, wherein the elastic portion is connected to the valve to apply an elastic force to the valve to close the liquid outlet.

[0013] Optionally, along the thickness direction of the cooling device, a plurality of cooling channels are provided on the cooling device, and the plurality of cooling channels are interconnected.

[0014] Optionally, the shell of the cooling device protrudes in a direction away from the cavity to form a cooling channel.

[0015] Optionally, a liquid inlet and an air pressure hole corresponding to the liquid inlet are provided on the second cooling channel, and the air pressure hole is configured to balance the internal and external pressures of the cooling device.

[0016] Optionally, the cooling device has a rhombus-shaped structure.

[0017] Optionally, a stopper is provided on the shell of the cooling device; the stopper is located between the first cooling channel and the second cooling channel.

[0018] According to a second aspect of the embodiment of the present application, a reducer is provided, wherein the reducer comprises a reduction mechanism and the cooling device as described in the first aspect, wherein the reduction mechanism is installed in the cavity.

[0019] Optionally, the speed reduction mechanism comprises a driving gear, a driven gear and an idle gear, and the idle gear is meshed with the driving gear and the driven gear respectively.

[0020] According to a second aspect of an embodiment of the present application, a vehicle is provided, wherein the vehicle comprises a reducer as described in the second aspect.

[0021] One technical effect of the present application is that an embodiment of the present application provides a cooling device. A cavity and a cooling channel connected to the cavity are formed in the cooling device. The cooling channel includes a first cooling channel facing the cold source and a second cooling channel away from the cold source. Since the first cooling channel faces the cold source and the second cooling channel faces away from the cold source, the coolant in the first cooling channel has a low temperature and a high density, and the coolant will sink. The temperature of the coolant in the second cooling channel is higher than that of the coolant in the first cooling channel; the coolant in the cavity expands due to heat, so that the coolant in the cavity flows along the cooling channel. When the temperature of the coolant in the first cooling channel is low enough and its density is large enough, the flow control valve is subjected to an unbalanced force and will open, so that the coolant in the first cooling channel flows into the cavity and finally forms a cycle.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 The structure of the reducer of the embodiment of the present application is shown as follows Figure 1 .

[0025] Figure 2 The structure of the reducer of the embodiment of the present application is shown as follows Figure 2 .

[0026] Figure 3 The structure of the cooling device of the present invention is shown as follows: Figure 1 .

[0027] Figure 4 The structure of the cooling device of the present invention is shown as follows: Figure 2 .

[0028] Figure 5 Shown is a schematic diagram of a cooling channel according to an embodiment of the present application.

[0029] Figure 6 Shown is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100. Cooling device; 300. Speed ​​reducer;

[0032] 1. Cavity; 2. Cooling channel; 200. Liquid inlet; 201. Opening; 202. Liquid outlet; 203. Air pressure hole; 21. First cooling channel; 22. Second cooling channel; 211. First sub-cooling channel; 212. Second sub-cooling channel; 221. Third sub-cooling channel; 222. Fourth sub-cooling channel; 3. Air supply channel; 4. Flow direction control valve; 41. Elastic part; 42. Valve; 5. Stop part; 6. Mounting hole; 71. Driving gear; 72. Driven gear; 73. Inert gear; 8. Wheel; 9. Air duct. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0035] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0036] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0037] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] When the reducer is in use, a large amount of heat will be generated due to factors such as friction of gears inside the reduction mechanism. The heat dissipation effect of the reducer in the prior art is poor, or even the reducer in the prior art does not have a heat dissipation function, which is very likely to cause heat accumulation in the reducer, thereby damaging the internal components of the reducer and affecting the service life of the reducer.

[0039] Based on the above technical problems, a first aspect of the embodiment of the present application provides a cooling device 100. In the embodiment of the present application, the cooling device 100 can be applied to a reducer. Figure 1-Figure 6 As shown, a cavity 1 is formed in the cooling device; a cooling channel 2 connected to the cavity 1 is arranged on the cooling device; the cooling channel 2 includes a first cooling channel 21 and a second cooling channel 22 connected to each other; the first cooling channel 21 and the second cooling channel 22 extend along the vertical direction of the cooling device; and the first cooling channel 21 is arranged toward the cold source, and the second cooling channel 22 is arranged away from the cold source; a flow direction control valve 4 is arranged on the first cooling channel 21, and the flow direction control valve 4 is used to control the first cooling channel 21 to be connected to the cavity 1, so that the coolant in the cooling device circulates in the cavity and the cooling channel.

[0040] In this embodiment, the cooling device 100 is applied to the field of speed reducers. A cavity 1 is formed in the cooling device 100, and the cavity 1 is used to install a speed reducer and a coolant that lubricates the speed reducer. For example, the coolant can be lubricating oil, cooling liquid, etc.

[0041] The cooling device 100 of the present application has the function of protecting the speed reduction mechanism on one hand, and on the other hand, the cooling device 100 of the present application is equivalent to a heat dissipation component, and the cooling channel 2 of the cooling device 100 itself can cool the internal cavity 1 of the speed reducer.

[0042] In this embodiment, the cooling channel 2 includes a first cooling channel 21 and a second cooling channel 22 which are interconnected. The first cooling channel 21 and the second cooling channel 22 extend in the vertical direction of the cooling device. That is, "extending in the vertical direction" means that the flow direction of the coolant in the first cooling channel 21 and the second cooling channel 22 extends in the vertical direction.

[0043] In this embodiment, the first cooling channel 21 is arranged toward the cold source, and the second cooling channel 22 is arranged away from the cold source. Since the first cooling channel 21 is arranged toward the cold source, and the second cooling channel 22 is arranged away from the cold source, the flow rate of the coolant entering the first cooling channel 21 is faster than the flow rate of the coolant entering the second cooling channel 22. The heat exchange efficiency of the first cooling channel 21 is higher than the heat exchange efficiency of the second cooling channel 22.

[0044] In this embodiment, a flow control valve 4 is provided on the first cooling channel 21, and the flow control valve 4 is used to control the first cooling channel 21 to be connected with the cavity 1, so that the cooling liquid in the cooling device circulates in the cavity 1 and the cooling channel 2. Specifically, the flow control valve 4 controls the connection between the first cooling channel 21 and the cavity 1. When the first cooling channel 21 is in a connected state with the cavity 1, the cooling liquid in the first cooling channel 21 flows into the cavity 1, and the cavity 1 is cooled.

[0045] In a specific embodiment, the coolant in the cavity 1, the first cooling channel 21 and the second cooling channel 22 is full or nearly full at the beginning, so that when the coolant in the cavity 1 is heated and expanded, the coolant in the cavity 1 enters the second cooling channel 22 through the opening 201. The coolant in the second cooling channel 22 has a higher temperature and a lower coolant density. The coolant in the second cooling channel 22 flows upward and then into the first cooling channel 21. When the coolant temperature in the first cooling channel 21 is low enough and its density is large enough, the flow control valve 4 is subjected to an unbalanced force and will open, so that the coolant in the first cooling channel 21 flows into the cavity 1 and finally forms a cycle.

[0046] In a specific embodiment, the cooling device is applied to a reducer. After the coolant in the cavity 1 and the coolant in the cooling channel 2 are cooled for the same time, the temperature of the coolant in the cavity 1 is still higher than the temperature of the coolant in the cooling channel 2. The temperature of the coolant in the second cooling channel 22 is higher than the temperature of the coolant in the first cooling channel 21.

[0047] Specifically, a speed reduction mechanism is provided in the cavity 1. As the speed reduction mechanism in the cavity 1 works, the friction of the speed reduction mechanism generates heat, and the temperature in the cavity 1 rises. As a result, a temperature difference will be generated between the coolant in the cavity 1 and the coolant in the cooling channel 2. That is, the temperature of the coolant in the cavity 1 will still be higher than the temperature of the coolant in the cooling channel 2.

[0048] The first cooling channel 21 is arranged toward the cold source, and the second cooling channel 22 is arranged away from the cold source. The flow rate of the coolant in the first cooling channel 21 is faster, and the heat exchange efficiency of the first cooling channel 21 is higher. The flow rate of the coolant in the second cooling channel 22 is slower than that of the coolant in the first cooling channel 21, and the heat exchange efficiency of the second cooling channel 22 is lower. The temperature of the coolant in the second cooling channel 22 will be higher than the temperature of the coolant in the first cooling channel 21.

[0049] The temperature of the coolant in the cavity 1 is too high, and the coolant in the cavity 1 expands. The coolant in the cavity 1 is squeezed into the second cooling channel 22 through the opening 201 for cooling. The temperature of the coolant in the second cooling channel is higher than that of the coolant in the first cooling channel. The temperature of the coolant in the second cooling channel 22 is higher, and the coolant density is lower. The coolant in the second cooling channel 22 flows to the top of the second cooling channel 22, and then flows into the first cooling channel 21; the coolant in the first cooling channel has a low temperature and a high density, and the coolant will sink. When the temperature of the coolant in the first cooling channel is low enough and its density is high enough, the flow control valve will open due to the unbalanced force, so that the coolant in the first cooling channel flows into the cavity and finally forms a cycle.

[0050] In a specific embodiment, the coolant is lubricating oil. The lubricating oil in the cavity 1 can lubricate the reduction mechanism installed in the cavity 1. The lubricating oil in the cooling channel 2 acts as a cooling medium. The lubricating oil in the cavity 1 and the lubricating oil in the cooling channel 2 are both low-viscosity lubricating oils. The low-viscosity lubricating oil provides better lubrication and protection for the reduction mechanism. In addition, the low-viscosity lubricating oil flows more smoothly in the cavity 1 and the cooling channel 2, further improving the heat dissipation effect of the reducer.

[0051] In one embodiment, referring to Figure 1 and Figure 2 As shown, along the horizontal direction of the cooling device, the first cooling channel 21 has a first size, and the second cooling channel 22 has a second size; the first size is greater than the second size.

[0052] In this embodiment, the cooling device 100 is applied to a vehicle, and the first cooling channel 21 on the cooling device 100 is arranged closer to the front of the vehicle than the second cooling channel 22. That is, when the vehicle is moving forward, the first cooling channel 21 is located on the windward side, and the second cooling channel 22 is located on the leeward side.

[0053] In the horizontal direction of the cooling device, the first dimension of the first cooling channel 21 on the windward side is greater than the second dimension of the second cooling channel 22 on the leeward side, that is, the width of the first cooling channel 21 disposed toward the cold source is greater than the width of the second cooling channel 22 disposed away from the cold source. In this way, the heat exchange effect in the first cooling channel 21 is better than the heat exchange effect in the second cooling channel 22.

[0054] Furthermore, the width of the first cooling channel 21 is relatively large, and the area of ​​the first cooling channel 21 is relatively large. Since the area of ​​the first cooling channel 21 is large and it is set toward the cold source, the temperature of the coolant in the first cooling channel 21 is low, the density is large, and it will sink; the width of the second cooling channel 22 is relatively small, and the area of ​​the second cooling channel 22 is relatively small. Since the area of ​​the second cooling channel 22 is small and it is set away from the cold source, the temperature of the coolant in the second cooling channel 22 is relatively higher than the temperature of the coolant in the first cooling channel 21; and the coolant in the cavity 1 expands due to heat, so that the coolant flows along the second cooling channel 22 into the first cooling channel 21. When the temperature of the coolant in the first cooling channel 21 is low enough and its density is large enough, the flow control valve 4 is subjected to an unbalanced force and will open, and the coolant in the first cooling channel 21 flows into the cavity, eventually forming a cycle.

[0055] In one embodiment, referring to Figure 1 and Figure 2 As shown, the flow direction control valve 4 includes a valve 42 ; a liquid outlet 202 is opened on the first cooling flow channel 21 , and the valve 42 is adapted to the liquid outlet 202 to open or close the liquid outlet 202 .

[0056] In this embodiment, a flow direction control valve 4 is provided in the cooling device 100. The flow direction control valve 4 is provided on the first cooling flow channel 21.

[0057] The first cooling channel 21 is provided with a liquid outlet 202, and the flow direction control valve 4 is provided with a valve 42, which is matched with the liquid outlet 202. The flow direction control valve 4 is used to control the communication between the first cooling channel 21 and the cavity 1.

[0058] When the valve 42 is in an open state, the coolant in the first cooling channel 21 flows into the cavity 1 to cool the cavity 1 .

[0059] When the valve 42 is in a closed state, the first cooling channel 21 is disconnected from the cavity 1 .

[0060] In one embodiment, an opening 201 is provided on the second cooling channel 22, and the second cooling channel 22 is connected to the cavity 1 through the opening 201. Along the vertical direction of the cooling device 100, the opening 201 is provided at a position higher than the liquid outlet 202. When the opening 201 is provided at a position higher than the liquid outlet 202, when the valve 42 blocks the liquid outlet 202, the coolant in the cavity 1 expands due to heat, and the coolant in the cavity 1 enters the second cooling channel 22 through the opening 201.

[0061] In one embodiment, referring to Figure 1 and Figure 2 As shown, the flow direction control valve 4 further includes an elastic portion 41 , and the elastic portion 41 is connected to the valve 42 to apply an elastic force to the valve 42 to close the liquid outlet 202 .

[0062] Specifically, the flow control valve 4 has a first state and a second state. When the flow control valve 4 is in the first state, the valve 42 blocks the liquid outlet 202 to prevent the coolant in the first cooling channel 21 from flowing into the cavity 1. Specifically, when the force exerted by the coolant pressure in the first cooling channel 21 on the valve 42 is less than the supporting force of the elastic part 41 on the valve 42 and the force exerted by the coolant in the cavity 1 on the elastic part 41, the valve 42 blocks the liquid outlet 202 of the cooling channel 2.

[0063] The flow control valve 4 is in the second state, the valve 42 is opened, and the coolant in the first cooling channel 21 will flow into the cavity 1, reducing the temperature of the coolant in the cavity 1. Specifically, when the coolant in the first cooling channel 21 has been fully cooled, the coolant temperature in the first cooling channel 21 is lower than the coolant temperature in the cavity 1, and the coolant density in the first cooling channel 21 is higher than the coolant density in the cavity 1. Therefore, a pressure difference is generated on both sides of the valve 42 of the flow control valve 4. When the pressure difference is greater than the elastic supporting force of the spring part supporting the valve 42, the valve 42 is opened, and the cooled coolant flows into the cavity 1. Until the pressure of the coolant in the first cooling channel 21 on the valve 42 is less than the force of the elastic part 41 on the valve 42, the valve 42 is closed again. In this way, the control of the flow direction of the coolant can be completed through the simple and purely mechanical structure of the flow control valve 4.

[0064] In one embodiment, referring to Figure 3-Figure 5 As shown, along the thickness direction of the cooling device, a plurality of cooling channels 2 are arranged on the cooling device, and the plurality of cooling channels 2 are interconnected.

[0065] In this embodiment, a plurality of interconnected cooling channels 2 are formed on the cooling device 100. Each cooling channel 2 is distributed along the circumference of the cooling device 100, that is, the cooling channel 2 is arranged outside the cavity 1, and the cooling channel 2 can cool the cooling liquid in the cavity 1 in all directions.

[0066] In one embodiment, referring to Figure 3-Figure 5 As shown, the shell of the cooling device protrudes in a direction away from the cavity 1 to form a cooling channel 2.

[0067] In this embodiment, the first cooling channel 21 protrudes in a direction away from the cavity 1 to form a cavity containing the cooling liquid. The second cooling channel 22 protrudes in a direction away from the cavity 1 to form a cavity containing the cooling liquid.

[0068] Since the first cooling channel 21 is protruded in the direction away from the cavity 1, and the second cooling channel 22 is protruded in the direction away from the cavity 1, in the thickness direction of the cooling device, two adjacent cooling channels 2 are arranged at intervals, and an air supply channel 3 is formed between adjacent cooling channels 2. For example, along the thickness direction of the cooling device 100, multiple cooling channels 2 are stacked. In the embodiment of the present application, multiple cooling channels 2 are stacked in the thickness direction of the cooling device 100, and the cooling channels 2 are distributed along the circumferential direction of the cooling device 100, further cooling the coolant in the cavity 1 in all directions.

[0069] When a cold source is introduced into the air supply channel 3, the coolant in the cooling device 100 circulates between the cavity 1 and the cooling channel 2. For example, when the cooling device is applied to the field of reducers, the cooling channel 2 and the air supply channel 3 are provided on the cooling device to realize the circulation between the coolant in the cavity 1 and the coolant in the cooling channel 2.

[0070] In one embodiment, referring to Figure 1 As shown, the second cooling channel 22 is provided with a liquid inlet 200 and an air pressure hole 203 corresponding to the liquid inlet 200 , and the air pressure hole 203 is configured to balance the internal and external pressures of the cooling device.

[0071] Specifically, an air pressure hole 203 is provided on the cooling channel 2, and the air pressure hole 203 is connected to the liquid inlet 200. The air pressure hole 203 is used to balance the external air pressure and the air pressure in the cooling channel 2, and assist the injection and discharge of the cooling liquid in the cooling channel 2 and the cavity 1.

[0072] In one embodiment, the cooling device has a diamond-shaped structure.

[0073] Specifically, the structure of the cooling device is a diamond structure. For example, the shell of the cooling device is a diamond structure. The cooling device is provided with a cooling channel 2, and the cooling channel 2 is arranged on the cooling device. The cooling channel 2 also has a diamond structure. The cooling channel 2 with a diamond structure facilitates the cooling liquid in the cooling channel 2, and the heat exchange efficiency of the cooling channel 2 is high.

[0074] In one embodiment, referring to Figure 1 and Figure 2 As shown, a stopper 5 is provided on the shell of the cooling device; the stopper 5 is located between the first cooling channel 21 and the second cooling channel 22 .

[0075] Since the stopper 5 is located between the first cooling channel 21 and the second cooling channel 22 and the first cooling channel 21 is arranged toward the cold source and the second cooling channel 22 is arranged away from the cold source, the heat exchange efficiency of the first cooling channel 21 is greater than that of the second cooling channel 22.

[0076] In a specific embodiment, the first cooling channel 21 includes a first sub-cooling channel 211 and a second sub-cooling channel 212 communicating with the first sub-cooling channel 211 , and the first sub-cooling channel 211 is located above the second sub-cooling channel 212 .

[0077] The second cooling channel 22 includes a third sub-cooling channel 221 and a fourth sub-cooling channel 222 communicating with the third sub-cooling channel 221 . The third sub-cooling channel 221 is located above the fourth sub-cooling channel 222 .

[0078] In this embodiment, a stopper 5 is formed on the cooling device 100 , and the stopper 5 is located between the second sub-cooling channel 212 and the fourth sub-cooling channel 222 .

[0079] In this embodiment, the first cooling channel 21 is on the windward side, and the cold air entering the air supply channel 3 flows toward the first sub-cooling channel 211 and the second sub-cooling channel 212 respectively. The cold air flowing toward the first sub-cooling channel 211 flows clockwise, which can cool down the coolant in the first sub-cooling channel 211 and the coolant in the third sub-cooling channel 221. The cold air flowing toward the second sub-cooling channel 212 flows counterclockwise, which can cool down the coolant in the second sub-cooling channel 212 and the coolant in the fourth sub-cooling channel 222. Figure 2 As shown, the hollow arrow shows the flow direction of the cold air entering the air supply channel 3.

[0080] The external cold wind flows toward the first sub-cooling channel 211 and the second sub-cooling channel 212 respectively, and the heat exchange effect of the first sub-cooling channel 211 is basically the same as the heat exchange effect of the second sub-cooling channel 212. Since the stopper 5 is formed between the second sub-cooling channel 212 and the fourth sub-cooling channel 222, and since the stopper is provided between the second sub-cooling channel 212 and the fourth sub-cooling channel 222, the external cold wind flows toward the second sub-cooling channel 212, and the stopper 5 will resist the flow of the external cold wind, thereby weakening the cold wind effect. Therefore, the stopper 5 has the effect of blocking the flow of cold wind, so that the heat exchange effect of the fourth sub-cooling channel 222 is weaker than that of the third sub-cooling channel 221.

[0081] Due to the different air flow velocities of the cold air in the air supply channel 3, the heat exchange effects on the liquid in the first cooling channel 21 and the second cooling channel 22 are different. The first cooling channel 21 is arranged toward cooling, and the cooling effect of the first cooling channel 21 is good.

[0082] After the first sub-cooling channel 211, the second sub-cooling channel 212, the third sub-cooling channel 221 and the fourth sub-cooling channel 222 have been air-cooled for the same period of time, the coolant in the first sub-cooling channel 211, the coolant in the second sub-cooling channel 212, the coolant in the third sub-cooling channel 221 and the coolant in the fourth sub-cooling channel 222 will produce a temperature gradient. The coolant in the first sub-cooling channel 211 and the second sub-cooling channel 212 on the windward side has a low temperature and a high density, and the coolant flows toward the bottom of the cooling channel 2. The coolant in the cavity 1 expands due to the heat, and the coolant in the cavity 1 flows into the fourth sub-cooling channel 222 and the third sub-cooling channel 221 through the opening 201. The coolant in the third sub-cooling channel 221 and the fourth sub-cooling channel 222 on the leeward side has a high temperature and a low density, and the coolant flows toward the first cooling channel 21.

[0083] For example, refer to Figure 2 As shown, the hollow arrow is a schematic diagram of the flow direction of the cold air. The solid arrow is a schematic diagram of the flow direction of the coolant in the cooling channel 2. The coolant in the cooling channel 2 flows counterclockwise. When the coolant in the first sub-cooling channel 211 and the second sub-cooling channel 212 has been fully cooled, the coolant temperature in the first sub-cooling channel 211 and the second sub-cooling channel 212 is lower than the coolant temperature in the cavity 1. The coolant density in the first sub-cooling channel 211 and the second sub-cooling channel 212 is higher than the coolant density in the cavity 1. Therefore, a pressure difference is generated on both sides of the valve 42 flowing to the control valve 4. When the pressure difference is greater than the supporting force of the elastic part 41 supporting the valve 42 and the force of the coolant in the cavity 1 on the elastic part 41, the valve 42 is opened, and the cooled coolant flows into the cavity 1, reducing the temperature of the coolant in the cavity 1.

[0084] The coolant in the cavity 1 expands due to heat, and the coolant in the cavity 1 flows into the fourth sub-cooling channel 222 and the third sub-cooling channel 221 through the opening 201. The coolant in the third sub-cooling channel 221 and the fourth sub-cooling channel 222 gradually flows into the first sub-cooling channel 211 and the second sub-cooling channel 212, so that the temperature of the coolant in the first sub-cooling channel 211 and the second sub-cooling channel 212 is close to the temperature of the coolant in the cavity 1, and the valve 42 is closed again. During the driving process of the vehicle, the flow control valve 4 is repeatedly opened and closed, so that the coolant circulates in the cavity 1 and the cooling channel 2, thereby improving the heat dissipation efficiency of the reducer.

[0085] Further, in this embodiment, the liquid outlet 202 is disposed on the first cooling channel 21, and the opening 201 is disposed on the second cooling channel 22. In particular, the liquid outlet 202 is disposed on the second sub-cooling channel 212, and the opening 201 is disposed on the fourth sub-cooling channel 222.

[0086] For example, the coolant with a higher temperature in the cavity 1 enters the second cooling channel 22 through the opening 201 for cooling treatment. In addition, due to the different heat exchange efficiencies of the first cooling channel 21 and the second cooling channel 22, the coolant entering the second cooling channel 22 flows counterclockwise toward the first cooling channel 21 to perform a more efficient heat exchange treatment. For example, the coolant after cooling treatment enters the cavity 1 through the liquid outlet 202 to realize the circulation of the coolant with a higher temperature in the cavity 1 and the coolant with a lower temperature in the cooling channel 2, so as to improve the heat dissipation effect of the reducer.

[0087] In one embodiment, a mounting hole 6 is provided on the cooling device. The cooling device is applied to the field of reducers. The cooling device is equivalent to the housing of the reducer. For example, the reducer is a wheel-side reducer, and the wheel-side reducer is arranged on the vehicle through the mounting hole 6.

[0088] According to a second aspect of the embodiment of the present application, a reducer 300 is provided. The reducer comprises a reduction mechanism and the cooling device 100 described in the first aspect, wherein the reduction mechanism is installed in the cavity 1.

[0089] Specifically, this embodiment provides a reducer. The cooling device 100 is applied to the reducer. When the temperature of the coolant in the cavity 1 is high (the speed reduction mechanism works to increase the temperature of the coolant in the cavity 1), the coolant in the cavity 1 flows through the opening 201 to the cooling channel 2 for heat exchange treatment; the coolant in the cooling channel 2 and after the heat exchange treatment flows through the liquid outlet 202 to the cavity 1, realizing the circulation between the coolant in the cavity 1 and the coolant in the cooling channel 2.

[0090] In one embodiment, referring to Figure 1 As shown, the speed reduction mechanism includes a driving gear 71, a driven gear 72 and an idler gear 73, and the idler gear 73 is meshed with the driving gear 71 and the driven gear 72 respectively.

[0091] Specifically, the driving gear 71 meshes with the idler gear 73, and the driven gear 72 meshes with the idler gear 73. The driving gear 71 drives the driven gear 72 to rotate. The driving gear 71 is provided with a first connecting shaft, which is connected to the engine, and the driven gear 72 is provided with a second connecting shaft, which is connected to the wheel.

[0092] Idle gear 73: Idle gear 73 is a gear that plays a transmission role between two non-contacting transmission gears and meshes with the two gears to change the rotation direction of the passive gear to make it the same as the driving gear 71. Its function is only to change the direction of rotation and cannot change the transmission ratio.

[0093] According to a third aspect of the embodiment of the present application, a vehicle is provided, wherein the vehicle comprises the reducer 300 described in the second aspect.

[0094] Specifically, in this embodiment, the reducer is applied to the vehicle, and the reducer is connected to the wheel 8. In the embodiment of the present application, air cooling is used to cool the reducer. An air duct 9 (a reserved hole on the vehicle itself) is provided on the front of the vehicle, and the air duct 9 is connected to the through hole of the brake disc, and the through hole of the brake disc is connected to the air supply channel 3, so that the outside air flows in from the front of the vehicle, passes through the air duct and the through hole on the brake disc to the air supply channel 3, so as to dissipate heat from the reducer. This embodiment uses the through hole originally provided on the front of the vehicle and the through hole on the brake disc to transmit outside air, thereby achieving the effect of reducing costs and saving layout space.

[0095] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0096] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A cooling device, characterized in that: A cavity (1) is formed in the cooling device; The cooling device is provided with a cooling channel (2) which is in communication with the cavity (1); The cooling channel (2) comprises a first cooling channel (21) and a second cooling channel (22) which are interconnected; The first cooling channel (21) and the second cooling channel (22) extend in a vertical direction of the cooling device; the first cooling channel (21) is arranged toward a cooling source, and the second cooling channel (22) is arranged away from the cooling source; The cavity (1) is connected to the second cooling channel (22), and a flow control valve (4) is provided on the first cooling channel (21). When the temperature of the coolant in the first cooling channel (21) is lower than the temperature of the coolant in the cavity (1), and the density of the coolant in the first cooling channel (21) is higher than the density of the coolant in the cavity (1), the flow control valve (4) controls the first cooling channel (21) to be connected to the cavity (1), so that the coolant in the cooling device circulates in the cavity (1) and the cooling channel (2).

2. The cooling device according to claim 1, characterized in that: Along the horizontal direction of the cooling device, the first cooling channel (21) has a first size, and the second cooling channel (22) has a second size; the first size is greater than the second size.

3. The cooling device according to claim 1, characterized in that: The flow direction control valve (4) comprises a valve (42); The first cooling flow channel (21) is provided with a liquid outlet (202), and the valve (42) is adapted to the liquid outlet (202) to open or close the liquid outlet (202).

4. The cooling device according to claim 3, characterized in that: The flow direction control valve further comprises an elastic part (41), wherein the elastic part (41) is connected to the valve (42) so as to apply an elastic force to the valve (42) to close the liquid outlet (202).

5. The cooling device according to any one of claims 1 to 4, characterized in that: Along the thickness direction of the cooling device, a plurality of cooling channels (2) are provided on the cooling device, and the plurality of cooling channels (2) are interconnected.

6. The cooling device according to claim 5, characterized in that: The shell of the cooling device protrudes in a direction away from the cavity (1) to form a cooling flow channel (2).

7. The cooling device according to claim 1, characterized in that: The second cooling channel (22) is provided with a liquid inlet (200) and an air pressure hole (203) corresponding to the liquid inlet (200), and the air pressure hole (203) is configured to balance the internal and external pressures of the cooling device.

8. The cooling device according to claim 1, characterized in that: The cooling device has a rhombus-shaped structure.

9. The cooling device according to claim 1, characterized in that: A stopper (5) is provided on the housing of the cooling device; the stopper (5) is located between the first cooling channel (21) and the second cooling channel (22).

10. A reducer, characterized in that: The reducer comprises a reduction mechanism and a cooling device according to any one of claims 1 to 9, wherein the reduction mechanism is installed in the cavity (1).

11. The reducer according to claim 10, characterized in that: The speed reduction mechanism comprises a driving gear (71), a driven gear (72) and an idle gear (73), and the idle gear (73) is respectively meshed with the driving gear (71) and the driven gear (72).

12. A vehicle, characterized in that: The vehicle comprises a retarder as claimed in claim 10 or 11.

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