A reducer system and vehicle

Abstract

The application provides a reducer system and a vehicle, and relates to the field of reducer control. In the technical scheme of the application, a reducer and an oil tank are arranged in the reducer system, and the reducer and the oil tank are connected through a first oil path and a second oil path. When the amount of lubricating oil in the reducer is relatively large, the reducer can deliver the lubricating oil to the oil tank, so as to reduce the amount of lubricating oil in the reducer and reduce the loss of lubricating oil. When the amount of lubricating oil in the reducer is relatively small, the lubricating oil in the oil tank can be delivered to the reducer, so as to supplement the lubricating oil in the reducer. By adopting the technical scheme of the application, the amount of lubricating oil in the reducer can be continuously adjusted when the vehicle is in different working conditions, so that the amount of lubricating oil in the reducer is adapted to the working condition of the vehicle, the operation efficiency of the reducer is improved, and the service life of the reducer is prolonged.

Description

Technical Field

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

[0002] The reducer contains shaft assemblies. Adding lubricating oil to the reducer can reduce the coefficient of friction between the shaft assemblies and lower the surface temperature of the shaft assemblies. However, the optimal amount of lubricating oil required in the reducer varies depending on the vehicle's operating conditions. In related technologies, the amount of lubricating oil in the reducer is not adjustable, making it difficult to improve the reducer's operating efficiency. Summary of the Invention

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

[0004] To achieve the above objectives, the first aspect of this application discloses a speed reducer system applied to a vehicle, comprising:

[0005] A speed reducer containing lubricating oil;

[0006] An oil tank containing lubricating oil;

[0007] The first oil circuit is configured to connect the reducer and the oil tank;

[0008] The second oil circuit is configured to connect the reducer and the oil tank;

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

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

[0011] When the amount of lubricating oil in the reducer is greater than or equal to the first oil quantity, at least a portion 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 may also include:

[0013] The oil pump is located in the second oil circuit;

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

[0015] Optionally, the reducer system may also include:

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

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

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

[0019] When the vehicle is in a first operating condition, it is determined that the lubricating oil in the reducer is greater than or equal to a first oil quantity, where the first operating condition is 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 quantity. The second operating condition is at least one of the following: the vehicle starts 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, wherein the second speed is less than the first speed.

[0021] Optionally, the reducer includes: a housing, the housing having an oil inlet and an oil outlet;

[0022] The oil inlet is connected to the second oil passage. When the lubricating oil in the reducer is less than or equal to the second oil quantity, at least a portion of the lubricating oil in the oil tank flows to the reducer through the second oil passage and the oil inlet.

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

[0024] Optionally, the reducer further includes:

[0025] Input shaft, the input shaft including input shaft teeth;

[0026] An oil tank, the oil tank including 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 teeth;

[0027] Connected to the oil inlet, the oil tank includes a sidewall close to the input shaft bearing. A plurality of oil injection holes are spaced apart on the sidewall and are oriented toward the input shaft gear. This allows at least a portion of the lubricating oil in the oil tank to enter the oil tank from the second oil passage and be sprayed from the oil injection holes to the input shaft gear when the lubricating oil in the reducer is less than or equal to the second oil quantity.

[0028] Optionally, the input shaft further includes an input shaft bearing, which is disposed in an input shaft bearing seat, the input shaft bearing seat being annular. The reducer further includes:

[0029] An oil return plate is provided in a conformal manner to the annular input shaft bearing position to at least recover the lubricating oil splashed out from the input shaft bearing position;

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

[0031] Optionally, the reducer further includes:

[0032] An oil guide plate is disposed 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;

[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] The second aspect of this application discloses a vehicle equipped with a system as described in any of the first aspects.

[0035] In summary, according to the technical solution disclosed in this application, the reducer system may include a reducer containing lubricating oil; an oil tank containing lubricating oil; a first oil passage configured to connect the reducer and the oil tank; and a second oil passage configured to connect the reducer and the oil tank. When the amount of lubricating oil in the reducer is greater than or equal to the first oil quantity, at least a portion of the lubricating oil in the reducer flows from the first oil passage to the oil tank. When the amount of lubricating oil in the reducer is less than or equal to the second oil quantity, at least a portion of the lubricating oil in the oil tank flows from the second oil passage to the reducer. In this application's technical solution, the reducer system includes a reducer and an oil tank, which are connected via the first and second oil passages respectively. When there is a large amount of lubricating oil in the reducer, the reducer can transfer lubricating oil to the oil tank to reduce the amount of lubricating oil in the reducer. When there is a small amount of lubricating oil in the reducer, the lubricating oil in the oil tank can be transferred to the reducer to replenish the lubricating oil in the reducer. By adopting the technical solution of this application, the amount of lubricating oil in the reducer can be continuously adjusted when the vehicle is under different working conditions, so as to make the amount of lubricating oil in the reducer match the working conditions of the vehicle, improve the operating efficiency of the reducer, and extend the service life of the reducer.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

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

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the reducer system structure provided in the embodiments of this application is shown. Figure 1 ;

[0040] Figure 2 A schematic diagram of the reducer system structure provided in the embodiments of this application is shown. Figure 2 ;

[0041] Figure 3 A schematic diagram of the reducer system structure provided in the embodiments of this application is shown. Figure 3 ;

[0042] Figure 4 A schematic diagram of the reducer structure provided in an embodiment of this application is shown. Figure 1 ;

[0043] Figure 5a A schematic diagram of the reducer structure provided in an embodiment of this application is shown. Figure 2 ;

[0044] Figure 5b A schematic diagram of the reducer structure provided in an embodiment of this application is shown. Figure 3 ;

[0045] Figure 5c A schematic diagram of the reducer structure provided in an embodiment of this application is shown. Figure 4 ;

[0046] Figure 6a Figure 5 shows a schematic diagram of the reducer structure provided in an embodiment of this application;

[0047] Figure 6b Sixth schematic diagram of the reducer structure provided in the embodiment of this application is shown. Detailed Implementation

[0048] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to 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 document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

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

[0051] A speed reducer contains shaft components, such as bearings and gears. The reducer changes the direction and torque of power transmission through the meshing of these gears. The reducer contains lubricating oil, which forms an oil film on the surfaces of the shaft components, reducing direct contact and wear. The lubricating oil also accelerates heat dissipation from the shaft components. However, the amount of lubricating oil required by the reducer varies depending on the vehicle's operating conditions. For example, when a vehicle is traveling at high speed, the gears in the reducer rotate at higher speeds, resulting in greater churning losses and a lower lubricating oil level. In this case, the reducer requires more lubricating oil.

[0052] In view of the above situation, this application provides a speed reducer system, such as Figure 1 As shown, it includes:

[0053] Reducer 11 contains lubricating oil;

[0054] 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 quantity, at least a portion of the lubricating oil in the reducer flows from the first oil passage to the oil tank; when the lubricating oil in the reducer is less than or equal to the second oil quantity, at least a portion of the lubricating oil in the oil tank flows from the second oil passage to the reducer.

[0058] The reducer system in this embodiment includes an oil tank, which is connected to the reducer via two oil lines. When there is a lot of lubricating oil in the reducer, the first oil line is activated to discharge some of the lubricating oil from the reducer, and the discharged oil is loaded into the oil tank. When there is a little lubricating oil in the reducer, the second oil line is activated to replenish the lubricating oil from the oil tank into the reducer.

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

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

[0061] When the amount of lubricating oil in the reducer is greater than or equal to the first oil quantity, at least a portion of the lubricating oil in the reducer flows from the first oil passage 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 by gravity. For example... Figure 1 As shown, the reducer 11 is installed at a higher position than the oil tank 12, which allows the lubricating oil to flow without relying on other devices.

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

[0064] The oil pump is located in the second oil circuit;

[0065] The controller, electrically connected to the oil pump, is configured to control the oil pump to pump out at least a portion of the lubricating oil from the oil tank and flow from the second oil passage to the reducer when the lubricating oil in the reducer is less than or equal to the second oil quantity.

[0066] To facilitate the flow of lubricating oil from the oil tank to the controller, this embodiment proposes installing an oil pump 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 draw lubricating oil from the oil tank and pressurize it to the reducer through the second pipeline.

[0067] The reducer system is also equipped with a controller, which is used to control the start and stop of the oil pump. When the second oil circuit is activated, the controller can activate the oil pump, which draws lubricating oil from the oil tank and delivers the drawn lubricating oil to the reducer through the second oil circuit.

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

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

[0070] The three-way valve has its first end connected to the reducer, its second end connected to the reducer, and its third end connected to the oil tank.

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

[0072] To facilitate switching between the first and second oil circuits, this embodiment proposes incorporating a three-way valve into the reducer system. A three-way valve is a valve device with three ports; when fluid flows through it, the valve controls the flow direction of the lubricating oil. The reducer system includes a first oil circuit and a second oil circuit, and the three-way valve enables switching between them. Figure 1 On the basis of, such as Figure 2As shown, a three-way valve 15 is provided, which includes a first end A, a second end B, and a third end C. The third end C is connected to the oil tank. When the third end C is connected to the first end A, the first oil circuit is connected; when the third end C is connected to the second end B, the second oil circuit is connected.

[0073] When the controller controls the opening of the first or second oil circuit, it can do so by controlling the opening of a three-way valve port. Additionally, at least one port of the three-way valve (first end A, second end B, and third end C) can be equipped with a flow sensor. The controller is connected to the flow sensor, and when lubricating oil is delivered through the three-way valve, the controller can determine the amount of lubricating oil being transmitted by acquiring the flow signal from the flow meter.

[0074] In other embodiments, when it is necessary to maintain a stable 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 a stable amount of lubricating oil in the reducer.

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

[0076] When the vehicle is in the first operating condition, the lubricating oil in the reducer is determined to be greater than or equal to the first oil quantity, and the first operating condition is greater than or equal to the first speed; and / or

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

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

[0079] The first operating condition represents a high vehicle speed. In this state, the shaft system components in the reducer rotate at high speeds, causing the lubricating oil in the reducer to splash and resulting in oil loss. The more lubricating oil in the reducer, the greater the oil loss. To reduce oil splashing loss, when the vehicle speed is detected to be greater than or equal to the first speed, it can be determined that the vehicle has entered the first operating condition. Further determining that there is too much lubricating oil in the reducer indicates that the oil splashing caused by the shaft system components is relatively serious. Therefore, at least some of the lubricating oil in the reducer is diverted from the first oil passage to the oil tank to reduce the oil loss in the reducer.

[0080] The second operating condition indicates insufficient lubricating oil in the reducer, particularly when some parts of the reducer's shaft components are not covered by lubricating oil, or when there is very little lubricating oil adhering to their surfaces. For the aforementioned situations, the second operating condition may refer to low-speed, high-torque driving or incline driving. The low-speed, high-torque driving condition could represent the user-selected off-road mode. In the low-speed, high-torque driving condition, the reducer's gears rotate at lower speeds but have higher torque, requiring adequate lubrication to prevent gear failure due to insufficient lubrication. In the incline driving condition, the lubricating oil in the reducer slopes with the incline, and some shaft components may not be in contact with the lubricating oil, leading to deteriorated lubrication conditions. Therefore, when the vehicle speed reaches a level less than or equal to the second speed or when the vehicle is in a slope driving condition, it can be directly confirmed that the lubricating oil level in the reducer is less than or equal to the second oil level. This indicates poor lubrication of the shaft components, requiring the addition of lubricating oil to prevent abnormal driving caused by poor lubrication.

[0081] Additionally, the second operating condition can also represent the vehicle's cold start at low temperatures. A cold start can be defined as starting the vehicle at a temperature less than or equal to a preset temperature while its speed is less than or equal to a second speed. This second speed can be the same as or different from the second speed in the low-speed, high-torque driving condition. Since the viscosity of lubricating oil increases sharply as temperature decreases, in low ambient temperatures, to quickly achieve a cold start, the lubricating oil level can be increased to enhance the heating effect of the churning oil, thereby rapidly warming the lubricating oil in the reducer and accelerating the reducer's entry into normal operating conditions. When it is determined that the vehicle is in a cold start state, it can be determined that the lubricating oil in the reducer is insufficient to quickly perform a cold start; at least some of the lubricating oil in the oil tank needs to flow from the second oil passage 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. When the lubricating oil in the reducer is less than or equal to the second oil quantity, 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 quantity, 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] To facilitate the injection and extraction of lubricating oil into and from the reducer, an oil inlet and an oil outlet are respectively provided on the reducer's housing. Figure 2 On the basis of, such as 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 passage 14. When the lubricating oil in the reducer is less than or equal to the second oil quantity, the lubricating oil obtained from the oil tank by the second oil passage is transported to the reducer housing through the oil inlet. The oil outlet 32 ​​is connected to the first oil passage 13. When the lubricating oil in the reducer is greater than or equal to the first oil quantity, the lubricating oil in the reducer is transported to the oil tank through the oil outlet 32 ​​and the second oil passage 14.

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

[0087] Input shaft, the input shaft includes input shaft teeth;

[0088] An oil tank, including a side wall, with multiple oil injection holes spaced apart on the side wall, the multiple oil injection holes being oriented toward the input shaft gear;

[0089] Connected to the oil inlet, the oil tank includes a side wall, which is close to the input shaft bearing. Multiple oil spray holes are spaced apart on the side, and the multiple oil spray holes are arranged towards the input shaft gear, so that when the lubricating oil in the reducer is less than or equal to the second oil quantity, at least part of the lubricating oil in the oil tank enters the oil tank from the second oil passage and is sprayed out from the oil spray holes to the input shaft gear.

[0090] The reducer contains a shaft system assembly, specifically including an input shaft, an intermediate shaft, and an output shaft. The input shaft contains input shaft teeth, the intermediate shaft contains intermediate shaft teeth, and the output shaft contains output shaft teeth. The input shaft teeth mesh with the intermediate shaft teeth, and the intermediate shaft teeth mesh with the output shaft teeth. The input shaft teeth, intermediate shaft teeth, and output shaft teeth all serve as the gear teeth in the reducer. Insufficient lubricating oil on these gear teeth can increase friction, leading to increased energy consumption and reduced gear lifespan. Conversely, when the gear teeth are positioned high and the lubricating oil level in the reducer is low, the gear teeth may not reach the lubricating oil during rotation, further increasing energy consumption and shortening the lifespan of the shaft system assembly.

[0091] This embodiment specifically focuses on the input axis. For example, in... Figure 3 Based on this, the reducer structure is as follows 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 located at a relatively high position, and the radius of the input shaft is small. When the lubricating oil level is low, there is insufficient lubricating oil adhering to the surface of the input shaft gear.

[0092] To ensure that the input shaft teeth can be quickly coated with lubricating oil, this embodiment further describes the structure of the reducer. The reducer is equipped with an oil groove, and multiple oil injection holes are provided on the sidewall of the oil groove, with the injection holes facing towards 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 trough 32 connected to the oil inlet 31. The oil trough 32 is provided with an oil passage 321, and the direction of lubricating oil transport in the oil passage 321 is as detailed below. Figure 5b As indicated by the arrows, this serves as a conduit for conveying lubricating oil. Additionally, multiple oil spray holes 322 are provided on the side wall of the oil tank 32. The lubricating oil conveyed in the oil passage 321 is sprayed onto the input shaft gear through these spray holes. The multiple oil spray holes 322 through which the lubricating oil passes are as follows: Figure 5c As shown.

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

[0095] After passing through the reducer structure provided in this embodiment, the lubricating oil injected into the reducer can be directly sprayed onto the input shaft teeth, allowing the lubricating oil to cover the surface of the input shaft teeth more quickly and alleviating the problem of insufficient lubricating oil on the surface of the input shaft teeth.

[0096] In some embodiments, the reducer is further provided with a cover plate, bolt holes and bolts. The cover plate is used to cover the oil sump, and the cover plate is fixed to the oil sump by the bolts and bolt holes, so as to seal the oil passage in the oil sump and reduce the possibility of leakage when the lubricating oil is transported in the oil passage.

[0097] In some embodiments, the input shaft further includes an input shaft bearing, which is disposed in an input shaft bearing seat and is annular in shape. The reducer further includes:

[0098] The oil return plate is configured to conform to the annular input shaft bearing position to at least recover the lubricating oil splashed out from the input shaft bearing position;

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

[0100] In addition to the input shaft teeth, the input shaft also has an input shaft bearing. The reducer has an annular input shaft bearing seat for fixing the input shaft bearing, thus fixing the input shaft bearing.

[0101] During rotation, especially at high speeds, the input, intermediate, and output shafts of the reducer will carry lubricating oil and splash it to other parts of the reducer cavity. To recover the splashed lubricating oil, this embodiment includes an oil return plate in the reducer. The oil return plate easily collects the splashed lubricating oil and allows it to flow back to the lubricating oil level along the plate.

[0102] like Figure 4 In the reducer structure shown, the input shaft is most likely to experience insufficient oil. In this embodiment, as shown in Figure 5, the reducer is provided with a reducer bearing seat 51, in which the input shaft bearing is fixed. An oil return groove 511 is also provided in the input shaft bearing seat. 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 oil return plate 52, but can also be injected directly into the input shaft bearing fixed in the input shaft bearing seat 51 through the oil return groove 511. This allows the lubricating oil to quickly cover the surface of the input shaft bearing, alleviating the problem of insufficient lubricating oil on the surface of the input shaft bearing.

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

[0104] An oil guide plate is positioned 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] To specifically realize the transfer of lubricating oil from the return plate to the tank, such as 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 into the oil return groove. Figure 6b The arrows indicate the flow trajectory of the lubricating oil. The lubricating oil is transported downwards on the return oil plate 52 under gravity. As it passes the first end 531 of the guide plate 53 connected to the return oil plate 52, it is conveyed along the guide plate towards the return oil groove, ensuring good contact between the input shaft bearing fixed in the input shaft bearing position and the lubricating oil. To enhance the oil guiding effect of the guide plate 53, the vertical height of the first end 531 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, allowing the guide plate 53 to collect more lubricating oil into the oil groove.

[0107] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

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

[0109] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0110] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification. Clearly, those skilled in the art can make various alterations and variations to this specification without departing from its spirit and scope. Thus, if such modifications and variations fall within the scope of the claims and their equivalents, this specification also intends to include such modifications and variations.

Claims

1. A reducer system, characterized by, The application is applied to a vehicle, and the reducer system comprises: a reducer containing lubricating oil therein; an oil tank containing lubricating oil therein; a first oil path configured to communicate the reducer and the oil tank; a second oil path configured to communicate the reducer and the oil tank; wherein, when the lubricating oil in the reducer is greater than or equal to a first oil amount, at least part of the lubricating oil in the reducer flows from the first oil path to the oil tank, and when the lubricating oil in the reducer is less than or equal to a second oil amount, at least part of the lubricating oil in the oil tank flows from the second oil path to the reducer; the reducer comprises a housing provided with an oil inlet and an oil outlet; the oil inlet is connected with the second oil path, 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 path and the oil inlet; the oil outlet is connected with the first oil path, and 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 path; the reducer further comprises: an input shaft comprising an input shaft bearing; an oil groove comprising a side wall, the side wall being provided with a plurality of oil injection holes at intervals, and the plurality of oil injection holes being arranged towards the input shaft bearing; the oil groove is connected with the oil inlet, the oil groove comprises a side wall, the side wall being close to the input shaft bearing, the side wall being provided with a plurality of oil injection holes at intervals, and the plurality of oil injection holes being arranged towards the input shaft bearing, 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 flows from the second oil path into the oil groove and is injected from the oil injection holes to the input shaft bearing.

2. The system of claim 1, wherein, In a direction perpendicular to a vehicle body of the vehicle, the position of the oil 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 path to the oil tank under the action of gravity.

3. The system of claim 1, wherein, Further comprising: an oil pump arranged in the second oil path; a controller electrically connected with the oil pump and configured to control the oil pump to pump at least part of the lubricating oil in the oil tank out and flow from the second oil path to the reducer when the lubricating oil in the reducer is less than or equal to the second oil amount.

4. The system of claim 1, wherein, Further comprising: a three-way valve, a first end of the three-way valve being connected with the reducer, a second end of the three-way valve being connected with the reducer, and a third end of the three-way valve being connected with the oil tank; a controller electrically connected with the three-way valve and configured to control the first end and the third end of the three-way valve to be communicated when the lubricating oil in the reducer is greater than or equal to the first oil amount, and control the second end and the third end of the three-way valve to be communicated when the lubricating oil in the reducer is less than or equal to the second oil amount.

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

6. The system of claim 1, wherein, The input shaft further comprises an input shaft bearing arranged in an input shaft bearing position, the input shaft bearing position being annular, and the speed reducer further comprises: an oil return plate arranged in a conforming manner with the annular input shaft bearing position to at least collect the lubricating oil splashed from the input shaft bearing position; an oil return groove arranged in the input shaft bearing position and connected with the oil return plate to collect the lubricating oil and then guide the lubricating oil into the input shaft bearing.

7. The system of claim 6, wherein, The speed reducer further comprises: an oil guide plate arranged between the oil return groove and the oil return plate and configured to guide the lubricating oil collected by the oil return plate into the oil return groove; the oil guide plate comprises a first end connected with the oil return plate and a second end connected with the oil return groove, a vertical height of the first end being greater than a vertical height of the second end, and / or a horizontal width of the first end being greater than a horizontal width of the second end.

8. A vehicle characterized by comprising: The vehicle is equipped with the speed reducer system according to any one of claims 1-7.

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