Speed reducer system and vehicle

Abstract

The invention provides a speed reducer system and a vehicle, and relates to the field of speed reducer control. According to the technical scheme, the speed reducer and the oil tank are arranged in the speed reducer system and connected through the first oil way and the second oil way correspondingly, and under the condition that much lubricating oil exists in the speed reducer, the speed reducer can convey the lubricating oil to the oil tank, so that the amount of the lubricating oil in the speed reducer is reduced, and lubricating oil losses are reduced. And under the condition of less lubricating oil in the speed reducer, the lubricating oil in the oil tank can be conveyed to the speed reducer, so that the lubricating oil in the speed reducer is supplemented. By the adoption of the technical scheme, the lubricating oil quantity in the speed reducer can be continuously adjusted when the vehicle is in different working conditions, so that the lubricating oil quantity in the speed reducer is matched with the working conditions of the vehicle, the operation efficiency of the speed reducer is improved, and the service life of the speed reducer is prolonged.

Description

Technical Field

[0001] The present application relates to the field of speed reducer control, and in particular to a speed reducer system and a vehicle. Background Art

[0002] The reducer is provided with a shaft assembly. Filling the reducer with lubricating oil can reduce the friction coefficient between the shaft assemblies and reduce the surface temperature of the shaft assemblies. However, the optimal amount of lubricating oil required in the reducer is different under different vehicle driving conditions. In the related art, the amount of lubricating oil in the reducer cannot be adjusted, making it difficult to improve the operating efficiency of the reducer. Summary of the invention

[0003] In view of this, the present application provides a reducer system and a vehicle, the main purpose of which is to adjust the amount of lubricating oil in the reducer so that the amount of lubricating oil adapts to the operating requirements of the reducer and improves the operating efficiency of the reducer.

[0004] To achieve the above objectives, the present application discloses a first aspect of a reducer system, which is applied to a vehicle and includes:

[0005] A reducer, wherein the reducer contains lubricating oil;

[0006] an oil tank containing lubricating oil;

[0007] A first oil circuit, configured to communicate with the reducer and the oil tank;

[0008] a second oil circuit, configured to communicate with the reducer and the oil tank;

[0009] When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil circuit to the oil tank; when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows from the second oil circuit to the reducer.

[0010] Optionally, in a direction perpendicular to the body of the vehicle, the position of the fuel tank is lower than the position of the reducer;

[0011] When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil passage to the oil tank under the action of gravity.

[0012] Optionally, the reducer system further comprises:

[0013] an oil pump, disposed in the second oil circuit;

[0014] The controller is electrically connected to the oil pump and is configured to control the oil pump to pump out at least part of the lubricating oil in the oil tank and flow the lubricating oil from the second oil path to the reducer when the lubricating oil in the reducer is less than or equal to a second oil amount.

[0015] Optionally, the reducer system further comprises:

[0016] A three-way valve, wherein a first end of the three-way valve is connected to the reducer, a second end of the three-way valve is connected to the reducer, and a third end of the three-way valve is connected to the oil tank;

[0017] The controller is electrically connected to the three-way valve and is configured to control the first end and the third end of the three-way valve to be connected when the lubricating oil in the reducer is greater than or equal to the first oil amount, and to control the second end and the third end of the three-way valve to be connected when the lubricating oil in the reducer is less than or equal to the second oil amount.

[0018] Optionally, the controller is further configured as:

[0019] When the vehicle is in a first operating condition, determining that the lubricating oil in the reducer is greater than or equal to a first oil amount, the first operating condition being greater than or equal to a first speed; and / or

[0020] When the vehicle is in a second operating condition, it is determined that the lubricating oil in the reducer is less than or equal to a second oil amount, and the second operating condition is at least one of the following: the vehicle is started at a temperature less than or equal to a preset temperature, the speed of the vehicle is less than or equal to a second speed, and the vehicle is in a slope driving state, and the second speed is less than the first speed.

[0021] Optionally, the reducer comprises: a housing, the housing being provided with an oil inlet and an oil outlet;

[0022] The oil inlet is connected to the second oil circuit, and when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows to the reducer through the second oil circuit and the oil inlet;

[0023] The oil outlet is connected to the first oil circuit. When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer is transported to the oil tank through the oil outlet and the first oil circuit.

[0024] Optionally, the reducer further includes:

[0025] an input shaft, the input shaft comprising input shaft gears;

[0026] An oil groove, the oil groove comprising a side wall, the side wall being provided with a plurality of oil injection holes at intervals, the plurality of oil injection holes being arranged toward the input shaft gear;

[0027] The oil groove is connected to the oil inlet, and includes a side wall, the side wall is close to the input shaft bearing, and a plurality of oil injection holes are arranged at intervals on the side edge, and the plurality of oil injection holes are arranged toward the input shaft teeth, so that when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank enters the oil groove from the second oil circuit and is sprayed from the oil injection holes to the input shaft teeth.

[0028] Optionally, the input shaft further includes an input shaft bearing, the input shaft bearing is arranged at an input shaft bearing position, the input shaft bearing position is annular, and the reducer further includes:

[0029] An oil return plate, the oil return plate being arranged in a conformal manner with the annular input shaft bearing seat, so as to at least recover the lubricating oil splashed out from the input shaft bearing seat;

[0030] An oil return groove is arranged at the bearing position of the input shaft, and the oil return groove is connected to the oil return plate to collect the recovered lubricating oil and then introduce it into the bearing.

[0031] Optionally, the reducer further includes:

[0032] an oil guide plate, the oil guide plate being disposed between the oil return groove and the oil return plate and configured to guide the lubricating oil recovered by the oil return plate into the oil return groove;

[0033] The oil guide plate includes a first end connected to the oil return plate and a second end connected to the oil return groove, the vertical height of the first end is greater than the vertical height of the second end, and / or the horizontal width of the first end is greater than the horizontal width of the second end.

[0034] A second aspect of the present application discloses a vehicle, in which the system as described in any one of the first aspects is mounted.

[0035] In summary, according to the technical solution disclosed in the present application, the reducer system may include a reducer, the reducer contains lubricating oil; an oil tank, the oil tank contains lubricating oil; a first oil circuit, configured to connect the reducer and the oil tank; a second oil circuit, configured to connect the reducer and the oil tank; wherein, when the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil circuit to the oil tank, and when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows from the second oil circuit to the reducer. In the technical solution of the present application, a reducer and an oil tank are provided in the reducer system, and the reducer and the oil tank are connected respectively through the first oil circuit and the second oil circuit. When there is more lubricating oil in the reducer, the reducer can transport the lubricating oil to the oil tank to reduce the amount of lubricating oil in the reducer. When there is less lubricating oil in the reducer, the lubricating oil in the oil tank can be transported to the reducer to replenish the lubricating oil in the reducer. By adopting the technical solution of the present application, the amount of lubricating oil in the reducer can be continuously adjusted when the vehicle is in different operating conditions, so that the amount of lubricating oil in the reducer is adapted to the operating conditions of the vehicle, thereby improving the operating efficiency of the reducer and extending the service life of the reducer.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 The schematic diagram of the reducer system structure provided by the embodiment of the present application is shown in FIG. Figure 1 ;

[0040] Figure 2 The schematic diagram of the reducer system structure provided by the embodiment of the present application is shown in FIG. Figure 2 ;

[0041] Figure 3 The schematic diagram of the reducer system structure provided by the embodiment of the present application is shown in FIG. Figure 3 ;

[0042] Figure 4 The structure of the reducer provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0043] Figure 5a The structure of the reducer provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0044] Figure 5b The structure of the reducer provided in the embodiment of the present application is shown in FIG. Figure 3 ;

[0045] Figure 5c The structure of the reducer provided in the embodiment of the present application is shown in FIG. Figure 4 ;

[0046] Figure 6a A fifth schematic diagram of the structure of a reducer provided in an embodiment of the present application is shown;

[0047] Figure 6b Schematic diagram six of the reducer structure provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0048] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0049] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0050] The reducer is an important mechanical device installed in vehicles, mainly used to reduce the speed of the engine or motor output and increase the torque to adapt to different driving conditions and load requirements.

[0051] The reducer contains shaft components, such as bearings, shaft gears and other structures. The reducer can change the transmission direction and torque of power through the meshing between the shaft gears. The reducer carries lubricating oil, which can cover the surface of the shaft components to form an oil film, reduce direct contact between the shaft components, reduce wear, and at the same time, the lubricating oil can speed up the heat dissipation of the shaft components. However, the amount of lubricating oil required in the reducer is different under different working conditions. For example, when the vehicle is driving at high speed, the speed of the shaft gears in the reducer is high, the oil churning loss of the gears is high, and the liquid level of the lubricating oil drops. At this time, the reducer needs more lubricating oil to be replenished.

[0052] In view of the above situation, the present application provides a reducer system, such as Figure 1 As shown, including:

[0053] A reducer 11, wherein the reducer 11 contains lubricating oil;

[0054] An oil tank 12, wherein the oil tank 12 contains lubricating oil;

[0055] The first oil circuit 13 is configured to connect the reducer and the oil tank;

[0056] The second oil circuit 14 is configured to connect the reducer and the oil tank;

[0057] When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil circuit to the oil tank; when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows from the second oil circuit to the reducer.

[0058] The reducer system in this embodiment is provided with an oil tank, which is connected to the reducer via two oil circuits. When there is more lubricating oil in the reducer, the first oil circuit is activated to discharge part of the lubricating oil in the reducer, and the discharged oil is loaded into the oil tank. When there is less lubricating oil in the reducer, the second oil circuit is activated to replenish the lubricating oil in the oil tank into the reducer.

[0059] By adopting the technical solution of this embodiment, dynamic adjustment of the amount of lubricating oil in the reducer can be achieved. By dynamically adjusting the lubricating oil between the reducer and the oil tank, dynamic adjustment of the amount of lubricating oil in the reducer can be achieved. Under the action of the lubricating oil with a variable amount of oil, the reducer can adapt to different working conditions of the vehicle, and the working efficiency of the reducer can be improved.

[0060] In some embodiments, in a direction perpendicular to the body of the vehicle, the position of the fuel tank is lower than the position of the reducer;

[0061] When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil path to the oil tank under the action of gravity.

[0062] In this embodiment, when the first oil circuit is open, the lubricating oil flows from the reducer into the oil tank, and the lubricating oil flows by gravity. Figure 1 As shown, the installation position of the reducer 11 is higher than the installation position of the oil tank 12, so that the circulation of lubricating oil can be achieved without relying on other devices.

[0063] In some embodiments, the reducer system further includes:

[0064] an oil pump, disposed in the second oil circuit;

[0065] The controller is electrically connected to the oil pump and is configured to control the oil pump to pump out at least part of the lubricating oil in the oil tank and flow it to the reducer from the second oil path when the lubricating oil in the reducer is less than or equal to the second oil amount.

[0066] In order to guide the lubricating oil in the oil tank to the controller, in this embodiment, an oil pump is provided in the second oil circuit, such as Figure 1 As shown in 141, the main function of the oil pump in the reducer system is to suck the lubricating oil from the oil tank and press it to the reducer through the second pipeline.

[0067] A controller is also provided in the reducer system, and the controller is used to control the start and stop of the oil pump. When it is determined that the second oil circuit is enabled, the controller can enable the oil pump, and the oil pump sucks lubricating oil from the oil tank and transports the sucked lubricating oil to the reducer through the second oil circuit.

[0068] In some embodiments, the controller can be used to control the conduction of the first oil circuit or the second oil circuit.

[0069] In some embodiments, the reducer system further includes:

[0070] A three-way valve, wherein a first end of the three-way valve is connected to the reducer, a second end of the three-way valve is connected to the reducer, and a third end of the three-way valve is connected to the oil tank;

[0071] The controller is electrically connected to the three-way valve and is configured to control the first end and the third end of the three-way valve to be connected when the lubricating oil in the reducer is greater than or equal to the first oil amount, and to control the second end and the third end of the three-way valve to be connected when the lubricating oil in the reducer is less than or equal to the second oil amount.

[0072] In order to facilitate the switching between the first oil circuit and the second oil circuit, a three-way valve is provided in the reducer system in this embodiment. The three-way valve is a valve device with three ports. When the fluid flows through the three-way valve, the three-way valve can control the flow direction of the lubricating oil. In the reducer system, a first oil circuit and a second oil circuit are provided, and the switching between the first oil circuit and the second oil circuit is achieved by the three-way valve. Figure 1 On the basis of Figure 2As shown, a three-way valve 15 is provided, and the three-way valve 15 includes a first end A, a second end B and a third end C. The third end C is connected to the oil tank, and when the third end C is connected to the first end A, the first oil circuit is connected, and when the third end C is connected to the second end B, the second oil circuit is connected.

[0073] When the controller controls the conduction of the first oil circuit or the second oil circuit, it can be implemented by controlling the ports of the three-way valve. In addition, at least one of the first end A, the second end B and the third end C of the three-way valve can be provided with a flow sensor, and the controller is connected to the flow sensor. When the lubricating oil is transported through the three-way valve, the controller can determine the amount of the lubricating oil transported by obtaining the flow signal of the flow meter.

[0074] In other embodiments, when it is necessary to maintain the stability of the amount of lubricating oil in the reducer, the first end A and the second end B of the three-way valve are opened, and the first end A and the second end B are connected. The lubricating oil flowing out of the reducer can be re-injected into the reducer through the three-way valve and the oil pump to maintain the stability of the amount of lubricating oil in the reducer.

[0075] In some embodiments, the controller is further configured to:

[0076] When the vehicle is in a first operating condition, determining that the lubricating oil in the reducer is greater than or equal to a first oil amount, the first operating condition being greater than or equal to a first speed; and / or

[0077] When the vehicle is in a second operating condition, it is determined that the lubricating oil in the reducer is less than or equal to a second oil amount, and the second operating condition is at least one of the following: the vehicle is started at a temperature less than or equal to a preset temperature, the vehicle speed is less than or equal to a second speed, and the vehicle is in a slope driving state, and the second speed is less than the first speed.

[0078] In this embodiment, the parameters used to represent different vehicle operating conditions are described. The vehicle operating condition can be represented by parameters such as speed, temperature or driving conditions. The parameters listed in this embodiment are respectively used to represent the operating condition where the reducer needs more fuel and the operating condition where the reducer does not need fuel.

[0079] The first operating condition indicates a condition where the vehicle is traveling at a relatively high speed. In this state, the rotation speed of the shaft system assembly in the reducer is relatively high, and the shaft system assembly will stir the lubricating oil in the reducer to splash, causing the loss of the lubricating oil. The more lubricating oil there is in the reducer, the more lubricating oil will be lost. In order to reduce the splashing loss of the lubricating oil, when it is detected that the vehicle's traveling speed is greater than or equal to the first speed, it can be determined that the vehicle has entered the first operating condition at this time, and it can be further determined that there is too much lubricating oil in the reducer. It can be considered that the splashing of the lubricating oil caused by the shaft system assembly is relatively serious at this time, so it is further executed to flow at least part of the lubricating oil in the reducer from the first oil circuit to the oil tank to reduce the loss of the lubricating oil in the reducer.

[0080] The second operating condition indicates that the lubricating oil in the reducer is insufficient, especially when some positions in the shaft system components in the reducer cannot be covered by the lubricating oil, or there is less lubricating oil attached to the surface. In view of the above-mentioned situation, the second operating condition may be represented by a low-speed high-torque driving condition or a slope driving condition, wherein the low-speed high-torque driving condition may represent the vehicle off-road mode actively selected by the user. In the low-speed high-torque driving condition, the speed of the shaft teeth in the reducer is low, but the torque is large, and the lubrication condition of the shaft teeth needs to be guaranteed to prevent the gears from failing due to insufficient lubrication. In the slope driving condition, the lubricating oil in the reducer follows the slope, and some shaft system components in the reducer may not be able to contact the lubricating oil liquid, and the lubrication condition deteriorates. Therefore, when the vehicle speed enters a state less than or equal to the second speed and the vehicle is in a slope driving state, it can be directly confirmed that the lubricating oil in the reducer is less than or equal to the second oil amount. It can be considered that the lubrication condition of the shaft system components is poor at this time, and it is necessary to add lubricating oil to the reducer to prevent driving abnormalities caused by poor lubrication conditions of the shaft system components.

[0081] In addition, the second operating condition can also represent the situation of a low-temperature cold start of the vehicle. The low-temperature cold start can be represented by the vehicle starting at a temperature less than or equal to a preset temperature and the vehicle speed less than or equal to a second speed. The second speed at this time can be the same as or different from the second speed of the low-speed high-torque driving condition. Since the viscosity of the lubricating oil increases sharply as the temperature decreases, when the temperature of the external environment is low, in order to quickly achieve a cold start of the vehicle, the lubricating oil level can be increased to enhance the heating of the oil stirring, so as to achieve a rapid temperature increase of the lubricating oil in the reducer and accelerate the speed at which the reducer enters a normal working state. When it is determined that the vehicle is in a low-temperature cold start state, it can be determined that the lubricating oil in the reducer is insufficient to quickly perform a low-temperature cold start, and at least part of the lubricating oil in the oil tank needs to flow from the second oil circuit to the reducer.

[0082] In some embodiments, the reducer includes: a housing, the housing having an oil inlet and an oil outlet;

[0083] The oil inlet is connected to the second oil circuit, and when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows to the reducer through the second oil circuit and the oil inlet;

[0084] The oil outlet is connected to the first oil circuit. When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer is transported to the oil tank through the oil outlet and the first oil circuit.

[0085] In order to inject lubricating oil into and extract lubricating oil from the reducer, an oil inlet and an oil outlet are respectively provided on the housing of the reducer. Figure 2 On the basis of Figure 3The schematic diagram of the reducer system shown includes an oil inlet 31 and an oil outlet 32. The oil inlet 31 is connected to the second oil circuit 14. When the lubricating oil in the reducer is less than or equal to the second oil volume, the lubricating oil obtained from the oil tank by the second oil circuit is transported to the housing of the reducer through the oil inlet. The oil outlet 32 ​​is connected to the first oil circuit 13. When the lubricating oil in the reducer is greater than or equal to the first oil volume, the lubricating oil in the reducer is transported to the oil tank through the oil outlet 32 ​​and the second oil circuit 14.

[0086] In some embodiments, the reducer further includes:

[0087] An input shaft, the input shaft comprising input shaft gears;

[0088] An oil groove, the oil groove comprises a side wall, a plurality of oil injection holes are arranged at intervals on the side wall, and the plurality of oil injection holes are arranged toward the shaft teeth of the input shaft;

[0089] The oil tank is connected to the oil inlet and includes a side wall, the side wall is close to the input shaft bearing, and a plurality of oil injection holes are arranged at intervals on the side edge, and the plurality of oil injection holes are arranged toward the input shaft gear, so that when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank enters the oil tank from the second oil path and is sprayed from the oil injection holes to the input shaft gear.

[0090] The reducer includes a shaft system component. Specifically, the shaft system component may include an input shaft, an intermediate shaft and an output shaft, wherein the input shaft includes input shaft gears, the intermediate shaft includes intermediate shaft gears, and the output shaft includes output shaft gears. The input shaft gears and the intermediate shaft gears, as well as the intermediate shaft gears and the output shaft gears, are meshed with each other. The input shaft gears, the intermediate shaft gears and the output shaft gears all serve as shaft gears in the reducer. If the lubricating oil covering the shaft gears is insufficient, the friction between the shaft gears is likely to increase, which increases energy consumption and reduces the service life of the shaft gears. When the shaft gears are set at a high position and the lubricating oil level in the reducer is low, it is difficult for the shaft gears to contact the lubricating oil during rotation, which is likely to increase energy consumption and shorten the service life of the shaft system component.

[0091] In this embodiment, the input shaft is specifically described. For example, Figure 3 Based on the reducer structure, Figure 4 As shown, Figure 4 The reducer includes an input shaft gear 41, an intermediate shaft gear 42 and an output shaft gear 43. The input shaft gear is arranged at a relatively high position. Meanwhile, the radius of the input shaft is small. When the lubricating oil level is low, the lubricating oil adhered to the surface of the input shaft gear is insufficient.

[0092] In order to allow the input shaft teeth to be quickly covered with lubricating oil, this embodiment further describes the structure in the reducer. The reducer is provided with an oil groove, and a plurality of oil spray holes are provided on the side wall of the oil groove, and the oil spray holes are arranged toward the input shaft teeth.

[0093] like Figure 5a As shown, after the lubricating oil is injected into the reducer through the oil inlet 31, the lubricating oil is further transported to the oil groove 32 connected to the oil inlet 31. The oil groove 32 is provided with an oil passage 321. The transport direction of the lubricating oil in the oil passage 321 is as shown in the specific development Figure 5b As shown by the arrow in the figure, as a pipeline for conveying lubricating oil, at the same time, a plurality of oil injection holes 322 are also provided on the side wall of the oil groove 32, and the lubricating oil conveyed in the oil passage 321 is sprayed toward the input shaft gear through the oil injection holes. The plurality of oil injection holes 322 through which the lubricating oil passes are shown in FIG. Figure 5c shown.

[0094] In one embodiment, in order to better atomize the lubricating oil during the lubricating oil injection process, the oil injection hole 322 can be set to have a shape with a gradually increasing aperture from the oil passage 321 toward the input shaft teeth. Specifically, the oil injection hole 322 can be set to a cone-like shape.

[0095] After the lubricating oil injected into the reducer passes through the reducer structure provided in this embodiment, the lubricating oil can be directly sprayed onto the input shaft teeth, so that the lubricating oil can cover the surface of the input shaft teeth more quickly, thereby alleviating the problem of lack of lubricating oil on the surface of the input shaft teeth.

[0096] In some embodiments, a cover plate, bolt holes and bolts are also provided in the reducer. The cover plate is used to cover the oil tank. The cover plate is fixed to the oil tank through the bolts and bolt holes to seal the oil channel in the oil tank, thereby reducing the possibility of leakage of the lubricating oil when being transported in the oil channel.

[0097] In some embodiments, the input shaft further includes an input shaft bearing, the input shaft bearing is arranged at the input shaft bearing position, the input shaft bearing position is annular, and the reducer further includes:

[0098] An oil return plate is arranged in a circular shape with the input shaft bearing seat to at least recover the lubricating oil splashed out from the input shaft bearing seat;

[0099] An oil return groove is arranged at the bearing position of the input shaft, and the oil return groove is connected to the oil return plate to collect the recovered lubricating oil and then introduce it into the bearing.

[0100] In addition to the input shaft teeth, the input shaft is also provided with an input shaft bearing, and the reducer is provided with an annular input shaft bearing seat for fixing the input shaft bearing, so as to fix the input shaft bearing.

[0101] During the rotation of the input shaft, intermediate shaft and output shaft in the reducer, especially during high-speed rotation, the lubricating oil will be picked up and splashed to other locations in the reducer cavity. In order to recover the splashed lubricating oil, this embodiment is provided with an oil return plate in the reducer. The oil return plate can easily collect the splashed lubricating oil and make the collected lubricating oil flow back to the lubricating oil level along the plate body of the oil return plate.

[0102] like Figure 4 In the reducer structure shown, the input shaft is most likely to be short of oil. In this embodiment, as shown in FIG5 , a reducer bearing position is provided in the reducer, wherein the input shaft bearing is fixed in the reducer bearing position 51, and an oil return groove 511 is also provided in the input shaft bearing position. The lubricating oil obtained by the oil return plate can not only return to the lubricating oil level at the bottom of the reducer along the plate body of the oil return plate 52, but also can be directly injected from the plate body of the oil return plate 52 through the oil return groove 511 to the input shaft bearing fixed in the input shaft bearing position 51, so that the lubricating oil can quickly cover the surface of the input shaft bearing, alleviating the problem of less lubricating oil on the surface of the input shaft bearing.

[0103] In some embodiments, the reducer further comprises:

[0104] An oil guide plate, the oil guide plate is arranged between the oil return groove and the oil return plate, and is configured to guide the lubricating oil recovered by the oil return plate into the oil return groove;

[0105] The oil guide plate includes a first end connected to the oil return plate and a second end connected to the oil return groove, the vertical height of the first end is greater than the vertical height of the second end, and / or the horizontal width of the first end is greater than the horizontal width of the second end.

[0106] In order to realize the transmission of lubricating oil from the oil return plate to the tank body, Figure 6a As shown, in this embodiment, an oil guide plate 53 is provided between the oil return groove and the oil return plate. The oil guide plate 53 can guide the lubricating oil flowing on the oil return plate 52 to be injected into the oil return groove. Figure 6b , the arrow indicates the flow trajectory of the lubricating oil. The lubricating oil is transported downward on the plate body of the oil return plate 52 under the action of gravity. When passing through the first end 531 of the oil guide plate 53 connected to the oil return plate 52, the lubricating oil is transported to the oil return groove along the oil guide plate, so that the input shaft bearing fixed in the input shaft bearing position can be in good contact with the lubricating oil. In order to enhance the oil guiding effect of the oil guide plate 53, the vertical height of the first end 531 of the oil guide plate 53 is greater than the vertical height of the second end 532, and / or the horizontal width of the first end 531 is greater than the horizontal width of the second end 532, so that the oil guide plate 53 can collect more lubricating oil into the oil groove.

[0107] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0108] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0109] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0110] Although preferred embodiments of the present specification have been described, additional changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present specification. Obviously, those skilled in the art may make various changes and modifications to the present specification without departing from the spirit and scope of the present specification. Thus, if these modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalents, the present specification is also intended to include these modifications and variations.

Claims

1. A reducer system, characterized in that: Applied to a vehicle, the reducer system comprises: A reducer, wherein the reducer contains lubricating oil; an oil tank containing lubricating oil; A first oil circuit, configured to communicate with the reducer and the oil tank; a second oil circuit, configured to communicate with the reducer and the oil tank; When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil circuit to the oil tank; when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows from the second oil circuit to the reducer.

2. The system according to claim 1, characterized in that In a direction perpendicular to the body of the vehicle, the position of the fuel tank is lower than the position of the reducer; When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer flows from the first oil passage to the oil tank under the action of gravity.

3. The system according to claim 1, characterized in that Also includes: an oil pump, disposed in the second oil circuit; The controller is electrically connected to the oil pump and is configured to control the oil pump to pump out at least part of the lubricating oil in the oil tank and flow the lubricating oil from the second oil path to the reducer when the lubricating oil in the reducer is less than or equal to a second oil amount.

4. The system according to claim 1, characterized in that Also includes: A three-way valve, wherein a first end of the three-way valve is connected to the reducer, a second end of the three-way valve is connected to the reducer, and a third end of the three-way valve is connected to the oil tank; The controller is electrically connected to the three-way valve and is configured to control the first end and the third end of the three-way valve to be connected when the lubricating oil in the reducer is greater than or equal to the first oil amount, and to control the second end and the third end of the three-way valve to be connected when the lubricating oil in the reducer is less than or equal to the second oil amount.

5. The system according to claim 3 or 4, characterized in that: The controller is also configured to: When the vehicle is in a first operating condition, determining that the lubricating oil in the reducer is greater than or equal to a first oil amount, the first operating condition being greater than or equal to a first speed; and / or When the vehicle is in a second operating condition, it is determined that the lubricating oil in the reducer is less than or equal to a second oil amount, and the second operating condition is at least one of the following: the vehicle is started at a temperature less than or equal to a preset temperature, the speed of the vehicle is less than or equal to a second speed, and the vehicle is in a slope driving state, and the second speed is less than the first speed.

6. The system according to claim 1, characterized in that The reducer comprises: a housing, the housing being provided with an oil inlet and an oil outlet; The oil inlet is connected to the second oil circuit, and when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank flows to the reducer through the second oil circuit and the oil inlet; The oil outlet is connected to the first oil circuit. When the lubricating oil in the reducer is greater than or equal to the first oil amount, at least part of the lubricating oil in the reducer is transported to the oil tank through the oil outlet and the first oil circuit.

7. The system according to claim 6, characterized in that The reducer also includes: an input shaft, the input shaft comprising input shaft gears; An oil groove, the oil groove comprising a side wall, the side wall being provided with a plurality of oil injection holes at intervals, the plurality of oil injection holes being arranged toward the shaft teeth of the input shaft; The oil groove is connected to the oil inlet, and includes a side wall, the side wall is close to the input shaft bearing, and a plurality of oil injection holes are arranged at intervals on the side edge, and the plurality of oil injection holes are arranged toward the input shaft teeth, so that when the lubricating oil in the reducer is less than or equal to the second oil amount, at least part of the lubricating oil in the oil tank enters the oil groove from the second oil circuit and is sprayed from the oil injection holes to the input shaft teeth.

8. The system according to claim 7, characterized in that The input shaft further includes an input shaft bearing, which is arranged at an input shaft bearing position, and the input shaft bearing position is annular. The reducer further includes: An oil return plate, the oil return plate being arranged in a conformal manner with the annular input shaft bearing seat to at least recover the lubricating oil splashed out from the input shaft bearing seat; An oil return groove is arranged at the bearing position of the input shaft, and the oil return groove is connected to the oil return plate to collect the recovered lubricating oil and then introduce it into the bearing.

9. The system according to claim 8, characterized in that The reducer also includes: an oil guide plate, the oil guide plate being disposed between the oil return groove and the oil return plate and configured to guide the lubricating oil recovered by the oil return plate into the oil return groove; The oil guide plate includes a first end connected to the oil return plate and a second end connected to the oil return groove, the vertical height of the first end is greater than the vertical height of the second end, and / or the horizontal width of the first end is greater than the horizontal width of the second end.

10. A vehicle, characterized in that: The vehicle is equipped with the speed reducer system according to any one of claims 1 to 9.

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