Speed reducer and vehicle

Abstract

The invention provides a speed reducer and a vehicle, the speed reducer is connected with an output shaft of a driving motor, and the speed reducer comprises a shell assembly, a speed reduction assembly and a pumping assembly. The shell assembly is provided with a first accommodating space; the speed reduction assembly is arranged in the first containing space, and the first containing space is configured to contain oil liquid used for lubricating the speed reduction assembly. The pumping assembly is used for pumping oil to a to-be-lubricated area of the speed reduction assembly and comprises an oil pump and an oil pipe connected with the oil pump, the oil pump is arranged outside the first containing space, and the oil pipe is arranged in the first containing space; wherein a transmission channel and an oil collecting pool are formed on the shell assembly, the transmission channel is matched with the oil pipe to be used for transmitting oil to a plurality of to-be-lubricated areas of the speed reduction assembly and is communicated with the transmission channel or the oil pipe, and the oil stored in the oil collecting pool can be conveyed to a to-be-cooled area of the driving motor. In this way, the transmission efficiency and the HVN performance of the speed reducer can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of reducers for new energy vehicles, and in particular to a reducer and a vehicle. Background Art

[0002] With the rapid development of the vehicle industry, new energy vehicles such as electric vehicles have been increasingly popularized in our daily lives. However, the electric drive assembly of existing new energy vehicles still has a lot of room for improvement. The reducer is a component in the electric drive assembly that is connected to the drive motor. The existing reducers used in new energy vehicles have low transmission efficiency and poor NVH performance. Therefore, how to improve the transmission efficiency and NVH performance of the reducer is an urgent problem that the new energy vehicle industry needs to solve. Summary of the invention

[0003] The present application provides a reducer, which is connected to the output shaft of a driving motor, and includes: a housing assembly, a reduction assembly, and a pumping assembly. The housing assembly is provided with a first accommodating space; the reduction assembly is provided in the first accommodating space, and the first accommodating space is configured to accommodate oil for lubricating the reduction assembly; the pumping assembly is used to pump the oil to the area to be lubricated of the reduction assembly, and the pumping assembly includes an oil pump and an oil pipe connected to the oil pump, the oil pump is provided outside the first accommodating space, and the oil pipe is provided in the first accommodating space; wherein, a transmission channel and an oil collecting tank are formed on the housing assembly, and the transmission channel and the oil pipe are used to transmit the oil to multiple areas to be lubricated of the reduction assembly, and the oil collecting tank is provided above the housing assembly in the direction of gravity, and is connected to the transmission channel or the oil pipe, and the oil stored in the oil collecting tank can be transported to the area to be cooled of the driving motor.

[0004] In some embodiments, the ratio of the volume of the oil collecting pool to the total oil storage is set to 0.05-0.15.

[0005] In some embodiments, the shell assembly is formed with multiple oil spray holes, and the multiple oil spray holes are arranged corresponding to the multiple areas to be lubricated. The transmission channel is connected to the corresponding oil spray holes, and the multiple oil spray holes are at least partially located in the upper area of ​​the area to be lubricated along the direction of gravity. The oil spray holes are used to spray oil directly or indirectly to the area to be lubricated.

[0006] In some embodiments, the housing assembly is provided with an oil inlet, which is arranged adjacent to the bottom of the housing assembly along the gravity direction, and the oil inlet is connected to an oil pump, which is used to pump oil through the oil inlet.

[0007] In some embodiments, the shell assembly includes a peripheral side wall, a first support wall and a second support wall, and one or both of the peripheral side wall, the first support wall and the second support wall form a transmission channel. The first support wall and the second support wall are arranged relative to each other along the axial direction of the output shaft of the driving motor. The peripheral side wall is connected between the first support wall and the second support wall to form a first accommodating space together with the first support wall and the second support wall. The first support wall and the second support wall are used to support the deceleration assembly. The peripheral side wall includes a bottom wall and a top wall arranged opposite to each other along the direction of gravity. One of the first support wall and the second support wall is provided with an oil inlet, and the oil inlet is arranged close to the bottom wall or at least part of the bottom edge of the oil inlet is in contact with the bottom wall.

[0008] In some embodiments, the oil inlet includes a first dimension and a second dimension, the first dimension is parallel to the direction of gravity, and the second dimension is perpendicular to the direction of gravity, wherein the maximum value of the second dimension is greater than the maximum value of the first dimension.

[0009] In some embodiments, the oil inlet is arranged in a crescent shape, a semicircular shape, a prolate shape, or an elliptical shape.

[0010] In some embodiments, the first support wall and the second support wall are provided with multiple bearing chambers for supporting the reduction assembly, and the reduction assembly at least includes an output-stage transmission mechanism, an intermediate-stage transmission mechanism and an input-stage transmission mechanism respectively connected to the corresponding bearing chambers, the rotating shaft of the input-stage transmission mechanism is connected to the output shaft of the drive motor, the output-stage transmission mechanism is used to be connected to the load, and the intermediate-stage transmission mechanism connects the input-stage transmission mechanism and the output-stage transmission mechanism to achieve output reduction of the drive motor, and the first support wall and / or the second support wall are also provided with an oil guide groove connected to the corresponding bearing chamber, and at least part of the oil spray holes are used to spray oil to the oil guide groove so that the oil can be guided along the oil guide groove to the corresponding bearing chamber.

[0011] In some embodiments, the reducer also includes an oil cooler and a filter connected to the oil pump assembly. The filter and the oil cooler are both arranged outside the first accommodation space. The filter is arranged adjacent to the oil pump. The oil cooler is arranged on the peripheral side wall. The oil pipe connects the filter and the oil cooler, and the oil cooler is also connected to the transmission channel. The transmission channel is connected to the oil collecting tank. The oil pump is used to pump the oil in the first accommodation space to the filter. The filter is used to filter the oil. The oil pipe is used to divert the filtered oil to the oil cooler. The oil cooler is used to cool the filtered oil. The transmission channel is used to divert the cooled oil to the oil collecting tank and the corresponding area to be lubricated.

[0012] The present application provides a vehicle, which includes a reducer according to any one of the above embodiments and a drive motor, wherein the drive motor is connected to the reduction assembly.

[0013] The beneficial effects of the embodiment of the present application are: a reducer, the reducer is connected to the output shaft of the driving motor, and the reducer includes: a housing component, a reduction component and a pumping component. The housing component is provided with a first accommodating space; the reduction component is arranged in the first accommodating space, and the first accommodating space is configured to accommodate oil for lubricating the reduction component; the pumping component is used to pump the oil to the area to be lubricated of the reduction component, and the pumping component includes an oil pump and an oil pipe connected to the oil pump, the oil pump is arranged outside the first accommodating space, and the oil pipe is arranged in the first accommodating space; wherein, a transmission channel and an oil collecting tank are formed on the housing component, and the transmission channel and the oil pipe are used to transmit the oil to multiple areas to be lubricated of the reduction component, and the oil collecting tank is arranged above the housing component in the direction of gravity, and is connected to the transmission channel or the oil pipe, and the oil stored in the oil collecting tank can be transported to the area to be cooled of the driving motor. Among them, the oil collecting tank is connected with the transmission channel, and the oil collecting tank has a certain volume. When the reducer is working, the oil pump pumps the oil to the transmission channel and also pumps the oil to the oil collecting tank. In this way, when the reducer is working, the oil in the first accommodating space will be distributed to the oil collecting tank, thereby reducing the oil storage in the first accommodating space, and then reducing the oil stirring amount of the reduction assembly, thereby effectively improving the transmission efficiency of the drive motor, and effectively reducing the noise of the reducer to improve the NVH performance of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the reducer of the present application;

[0015] Figure 2 yes Figure 1 The exploded structural diagram of the reducer shown;

[0016] Figure 3 yes Figure 2 A schematic diagram of the structure of the first housing facing the second housing and cooperating with the oil pipe;

[0017] Figure 4 yes Figure 2 A schematic structural diagram of a side of the second shell facing the first shell is shown;

[0018] Figure 5 yes Figure 2 The schematic diagram of the structure of the first shell side facing away from the second shell is shown. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] The terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited. In addition, the terms "including" and "having" and any of their variations are intended to cover exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present application provides a reducer 10, which can be applied to vehicles driven by electric drive, such as new energy vehicles. The reducer 10 is connected to the output shaft of the drive motor, and the reducer 10 includes: a housing assembly 100, a reduction assembly 200, and a pumping assembly. The housing assembly 100 is provided with a first accommodating space 104. The reduction assembly 200 is arranged in the first accommodating space 104, and the first accommodating space 104 is configured to accommodate oil for lubricating the reduction assembly 200. The pumping assembly is used to pump oil to the area to be lubricated of the reduction assembly 200. The pumping assembly includes an oil pump 310 and an oil pipe 320 connected to the oil pump 310. The oil pump 310 is arranged outside the first accommodating space 104, and the oil pipe 320 is arranged inside the first accommodating space 104; wherein, a transmission channel 130 and an oil collecting tank 160 are formed on the housing assembly 100, and the transmission channel 130 and the oil pipe 320 are used to transmit oil to multiple areas to be lubricated of the reduction assembly 200. The oil collecting tank 160 is arranged above the housing assembly 100 along the gravity direction x2, and is connected to the transmission channel 130 or the oil pipe 320. The oil stored in the oil collecting tank 160 can be transported to the area to be cooled of the drive motor.

[0022] Specifically, the reducer 10 generally lubricates the reduction assembly 200 by splash lubrication. For example, during the movement, the reduction assembly 200 stirs and drives the oil in the first accommodating space 104 so that the oil splashes to various areas to be lubricated of the reducer 10, thereby achieving lubrication. However, splash lubrication is uncontrollable, and splash lubrication cannot accurately and fully lubricate the areas to be lubricated of the reduction assembly 200, thereby greatly affecting the working stability and service life of the reduction assembly 200. Among them, in the embodiment of the present application, the reducer 10 is provided with an oil pump 310, and the housing assembly 100 is provided with a transmission channel 130 for transmitting oil, and the transmission channel 130 cooperates with the oil pipe 320. The oil pump 310 is used to pump the oil in the first accommodating space 104 and transport the oil to the lubricated area of ​​the reduction assembly 200 through the oil pipe 320 and the transmission channel 130. In this way, in addition to being able to drive the oil through the reduction assembly 200 to achieve splash lubrication, the reducer 10 can also pump the oil in the first accommodating space 104 through the oil pump 310, and transport the oil to the corresponding lubricated area with the cooperation of the transmission channel 130 and the oil pipe 320, thereby realizing active lubrication of the lubricated area of ​​the reduction assembly 200, so that the oil can more fully and accurately lubricate the lubricated area of ​​the reduction assembly 200, so as to effectively improve the working stability and service life of the reducer 10.

[0023] Among them, the transmission channel 130 is used as a channel for transmitting oil, and is formed on the housing assembly 100 by forming. For example, the transmission channel 130 can be opened on the housing assembly 100 by forming processes such as lathe, drilling or casting, so that the number of parts of the reducer 10 can be effectively reduced, thereby effectively simplifying the assembly process of the reducer 10 to improve the assembly efficiency of the reducer 10. In addition, compared with the method of setting an additional pipeline as a channel for transmitting oil in the first accommodating space 104, the transmission channel 130 formed on the housing assembly 100 by forming will not occupy the first accommodating space 104 for accommodating the reduction assembly 200. Based on this, when opening the first accommodating space 104, it is not necessary to reserve additional space for the transmission channel 130. Therefore, compared with the method of setting an additional pipeline as a channel for transmitting oil in the first accommodating space 104, the transmission channel 130 for transmitting oil is formed on the housing assembly 100 by forming, which can reduce the overall volume of the housing assembly 100 to a certain extent, thereby effectively reducing the overall volume of the reducer 10.

[0024] A large amount of oil for lubricating the reduction assembly 200 is stored in the first accommodating space 104. The reduction assembly 200 will be at least partially immersed in the oil. If the amount of oil in the first accommodating space 104 is too much, the oil stirring amount of the reduction assembly 200 will increase when the reducer 10 is working, so that the resistance of the oil to the reduction assembly 200 will increase, thereby increasing the oil stirring loss of the reduction assembly 200, and further reducing the transmission efficiency of the reducer 10. In addition, since the oil stirring amount of the reduction assembly 200 is too large, the noise of stirring the oil when the reduction assembly 200 is working will also increase, thereby affecting the NVH performance of the reducer 10. Therefore, in the embodiment of the present application, the housing assembly 100 is also formed with an oil collecting pool 160. In other words, the oil collecting pool 160 is formed on the housing assembly 100 in a forming manner, wherein the oil collecting pool 160 is connected to the transmission channel 130, and the oil collecting pool 160 has a certain volume. When the reducer 10 is working, the oil pump 310 pumps the oil to the transmission channel 130 and also pumps the oil to the oil collecting pool 160. In this way, when the reducer 10 is working, the oil storage in the first accommodating space 104 will be distributed to the oil collecting pool 160, thereby reducing the oil storage in the first accommodating space 104, and further reducing the oil stirring amount of the reduction assembly 200, thereby effectively improving the transmission efficiency of the drive motor while effectively reducing the noise of the reducer 10 to improve the NVH performance of the reducer 10.

[0025] Of course, in some embodiments, the oil collecting tank 160 may also be directly connected to the oil pipe 320 , and the oil in the first storage space 104 is guided to the oil collecting tank 160 along the oil pipe 320 under the action of the oil pump 310 , so that the oil collecting tank 160 can share the oil for the first storage space 104 .

[0026] Optionally, in some embodiments, the ratio of the volume of the oil collecting pool 160 to the total oil reserve is set to 0.05-0.15. Specifically, the volume of the oil collecting pool 160 determines the amount of oil that the oil collecting pool 160 distributes to the first accommodating space 104. The total oil reserve is the total oil reserve circulating in the reducer 10. The ratio of the volume of the oil collecting pool 160 to the total oil reserve is set to 0.05-0.15, so that when the reducer 10 is working, after the oil in the first accommodating space 104 is distributed by the oil collecting pool 160, the oil stirring amount of the reduction assembly 200 can be maintained in a more reasonable range, thereby reducing the oil stirring loss and oil stirring noise of the reduction assembly 200, and ensuring that the oil stirring amount of the reduction assembly 200 can enable the reduction assembly 200 to achieve lubrication of the lubricated area not covered by the transmission channel 130 through splash lubrication, thereby effectively improving the working stability of the reduction assembly 200.

[0027] Optionally, in some embodiments, the oil collecting tank 160 is arranged above the shell assembly 100 along the gravity direction x2. Based on this, when the reducer 10 stops working, the oil in the oil collecting tank 160 can also flow back to the first containing space 104 under the action of gravity, thereby ensuring that the oil in the oil collecting tank 160 can maintain a virtuous cycle with the oil in the first containing space 104, thereby ensuring the quality of the oil in the reducer 10 and ensuring the working stability of the reducer 10.

[0028] Alternatively, if Figure 4 As shown, in some embodiments, the oil stored in the oil collecting pool 160 can be transported to the area to be cooled of the motor. Specifically, in the embodiment of the present application, at least part of the housing assembly 100 serves as the housing of the drive motor, wherein the oil collecting pool 160 is arranged at the part of the housing assembly 100 serving as the housing of the drive motor, and the oil collecting pool 160 can be arranged around the end of the stator winding of the drive motor, and the corresponding housing assembly 100 is also provided with a spray port connected to the oil collecting pool 160, and the oil in the oil collecting pool 160 can be sprayed to the end of the stator winding through the spray port, thereby cooling the end of the stator winding. Among them, the oil pump 310 pumps the oil to the oil collecting pool 160, and the oil converges at the oil collecting pool 160, thereby achieving the effect of increasing the spray pressure, so that the oil after the oil collecting pool 160 is pressurized can be more efficiently sprayed to various areas of the end of the stator winding through the spray port, so that the oil can more fully cool the end of the stator winding.

[0029] Optionally, in some embodiments, the housing assembly 100 is formed with a plurality of oil spray holes (not shown), and the plurality of oil spray holes are arranged corresponding to the plurality of areas to be lubricated, the transmission channel 130 is connected to the corresponding oil spray holes, and the plurality of oil spray holes are at least partially located in the upper area of ​​the area to be lubricated along the gravity direction x2, and the oil spray holes are used to spray oil directly or indirectly to the area to be lubricated.

[0030] Specifically, in the embodiment of the present application, the housing assembly 100 is provided with a corresponding number of oil spray holes at positions adjacent to the area to be lubricated (wherein the number of oil spray holes in each area to be lubricated can be set according to actual conditions, which will not be described in detail herein), and the transmission channel 130 provided on the housing assembly 100 is connected to the corresponding oil spray holes, and the oil pumped by the oil pump 310 can be transmitted to the transmission channel 130 via the oil pipe 320, and the oil is guided to the corresponding oil spray holes via the transmission channel 130, and is sprayed directly or indirectly along the oil spray holes to the corresponding area to be lubricated, so that the oil spray holes connected to the transmission channel 130 are formed in a forming manner on the housing assembly 100, so that the oil can be sprayed to the corresponding area to be lubricated through the oil spray holes, so as to realize active lubrication of the area to be lubricated, thereby eliminating the need to install additional oil spray nozzles on the housing assembly 100, thereby effectively reducing the number of parts of the reducer 10. Moreover, in some embodiments, the oil spray hole can be set in the upper area of ​​the area to be lubricated along the gravity direction x2, so that the oil can spray from the oil spray hole to the upper area of ​​the area to be lubricated, and flow to the lower area of ​​the area to be lubricated under the action of gravity, so that the oil can lubricate the area to be lubricated more fully from top to bottom.

[0031] Among them, the multiple fuel injection holes may include a spray port, a first fuel injection hole, a second fuel injection hole, a third fuel injection hole, a fourth fuel injection hole, a fifth fuel injection hole 137 and a sixth fuel injection hole, and details can be found in the following content.

[0032] Alternatively, if Figure 3 As shown, in some embodiments, the housing assembly 100 is provided with an oil inlet 150, which is arranged near the bottom of the housing assembly 100 along the gravity direction x2, and is communicated with the oil pump 310, and the oil pump 310 is used to pump the oil in the first accommodation space 104 through the oil inlet 150 to pump the oil to the transmission channel 130. Due to the stirring of the reduction assembly 200 or the shaking of the vehicle during operation, the oil in the first accommodation space 104 will flow in a turbulent manner, thereby causing the liquid level of the oil to change all the time. When the liquid level of the oil is lower than the oil inlet 150, the oil will not be able to seal the oil inlet 150, thereby causing the oil pump 310 to be unable to pump the oil normally or causing air to enter the oil pump 310 from the oil inlet 150, thereby affecting the oil pumping efficiency of the oil pump 310 and increasing the working noise of the oil pump 310. Among them, arranging the oil inlet 150 adjacent to the bottom of the housing assembly 100 can reduce the risk that the oil cannot seal the oil inlet 150 , thereby effectively improving the working stability of the oil pump 310 and reducing the working noise of the oil pump 310 .

[0033] Alternatively, if Figure 3As shown, in some embodiments, the housing assembly 100 includes a peripheral side wall 112, a first support wall 111, and a second support wall 113. One or both of the peripheral side wall 112, the first support wall 111, and the second support wall 113 form a transmission channel 130. The first support wall 111 and the second support wall 113 are relatively spaced along the axial direction x1 of the output shaft of the driving motor. The peripheral side wall 112 is connected between the first support wall 111 and the second support wall 113 to form a first accommodating space 104 with the first support wall 111 and the second support wall 113. The first support wall 111 and the second support wall 113 are used to support The deceleration assembly 200 has a peripheral side wall 112 including a bottom wall 1121 and a top wall relatively arranged along the gravity direction x2, and one of the first support wall 111 and the second support wall 113 is provided with an oil inlet 150 connected to the pumping assembly, wherein the oil inlet 150 is arranged close to the bottom wall 1121 or at least part of the bottom edge of the oil inlet 150 is in contact with the bottom wall 1121, so that the oil inlet 150 as a whole can be arranged close to the bottom of the housing assembly 100, thereby effectively reducing the risk that the oil cannot seal the oil inlet 150, thereby effectively improving the working stability of the oil pump 310 and reducing the working noise of the oil pump 310.

[0034] Optionally, along the axial direction x1, the first support wall 111 is arranged closer to the drive motor than the second support wall 113. In other words, along the axial direction x1, the first support wall 111 is located between the second support wall 113 and the drive motor, wherein a connecting through hole (the connecting through hole is also the first bearing chamber 1110 described below) is arranged on the first support wall 111, and the output shaft of the drive motor can be connected to the reduction assembly 200 through the connecting through hole. The oil inlet 150 can be arranged on the first support wall 111, and the oil pump 310 can be arranged on the first support wall 111, and along the axial direction x1, the oil pump 310 and the drive motor are located on the same side of the first support wall 111, so that the space utilization rate of the side of the first support wall 111 away from the second support wall 113 can be effectively improved. For example, a mounting portion for mounting the oil pump 310 is provided on one side of the first support wall 111 away from the second support wall 113 , wherein the mounting portion is communicated with the oil inlet 150 , and the oil pump 310 is installed on the oil pump 310 to be communicated with the oil inlet 150 .

[0035] Of course, in some embodiments, the oil inlet 150 may also be provided on the second supporting wall 113 according to actual needs, which will not be described in detail herein.

[0036] Optionally, the oil inlet 150 includes a first dimension and a second dimension, the first dimension is parallel to the gravity direction x2, and the second dimension is perpendicular to the gravity direction x2, wherein the maximum value of the second dimension is greater than the maximum value of the first dimension. Specifically, the first dimension is a dimension parallel to the gravity direction x2, and the second dimension is a dimension parallel to the gravity direction x2. The first dimension and the second dimension jointly determine the opening area of ​​the oil inlet 150, wherein the first dimension affects the difficulty of liquid sealing of the oil inlet 150, and the larger the maximum value of the first dimension is, the greater the difficulty of liquid sealing of the oil inlet 150 by the oil in the first accommodating space 104 is, while the second dimension has a smaller effect on the difficulty of liquid sealing of the oil inlet 150, so setting the maximum value of the second dimension to be greater than the maximum value of the first dimension can effectively reduce the difficulty of liquid sealing of the oil inlet 150 while ensuring that the opening area of ​​the oil inlet 150 is large enough to ensure the oil pumping amount of the oil pump 310, thereby effectively improving the working stability of the oil pump 310.

[0037] Optionally, in some embodiments, the oil inlet 150 may be configured to be a crescent shape, a semicircle, a flat elongated shape, an ellipse, or other shapes, wherein the second dimension is larger than the first dimension. Figure 3 As shown, in the embodiment of the present application, the oil inlet 150 is in a crescent shape.

[0038] Alternatively, if Figure 3 and Figure 5 As shown, the first support wall 111 and the second support wall 113 are provided with a plurality of bearing chambers for supporting the reduction assembly 200 (the first bearing chamber 1110, the second bearing chamber 1111, the third bearing chamber 1112, the fourth bearing chamber 1113, the fifth bearing chamber 1114 and the sixth bearing chamber 1115 as described below), and the reduction assembly 200 at least includes an output stage transmission mechanism (not marked in the figure), an intermediate stage transmission mechanism (not marked in the figure) and an input stage transmission mechanism (not marked in the figure) respectively connected to the corresponding bearing chambers, and the input stage transmission mechanism The rotating shaft is connected to the output shaft of the driving motor, the output stage transmission mechanism is used to be connected to the load, the intermediate stage transmission mechanism connects the input stage transmission mechanism and the output stage transmission mechanism to realize the output deceleration of the driving motor, the first supporting wall 111 and / or the second supporting wall 113 are also provided with oil guide grooves (such as the first oil guide groove 140, the second oil guide groove 141 and the third oil guide groove 142 described below) connected to the corresponding bearing chamber, and at least part of the oil spray holes are used to spray the oil to the oil guide grooves so that the oil can be guided to the corresponding bearing chamber along the oil guide grooves.

[0039] Specifically, the output-stage transmission mechanism, the intermediate-stage transmission mechanism and the input-stage transmission mechanism may be gear reduction mechanisms, and the output-stage transmission mechanism, the intermediate-stage transmission mechanism and the input-stage transmission mechanism are connected to the housing assembly 100 in a relative rotational manner through bearings. The first support wall 111 is provided with three bearing chambers corresponding to the output-stage transmission mechanism, the intermediate-stage transmission mechanism and the input-stage transmission mechanism, respectively. Correspondingly, the second support wall 113 is also provided with three bearing chambers corresponding to the first support wall 111. The output-stage transmission mechanism, the intermediate-stage transmission mechanism and the input-stage transmission mechanism are respectively arranged between two corresponding bearing chambers through corresponding bearings, thereby realizing a rotational connection with the housing assembly 100. The first support wall 111 and / or the second support wall 113 are also provided with an oil guide groove connected to the corresponding bearing chamber, and the oil spray hole can spray oil into the oil guide groove, so that the oil can be guided into the bearing chamber along the oil guide groove, so that the oil can lubricate the bearing member located in the bearing chamber, so that the interference of the reduction assembly 200 on the oil spray hole can be reduced, so that the oil sprayed from the oil spray hole can avoid the shielding of the reduction assembly 200, and smoothly flow into the corresponding bearing member along the oil guide groove, so as to fully lubricate the bearing member. For example, in an embodiment of the present application, an oil guide groove is provided on the first support wall 111, wherein the oil guide groove is connected to the bearing chamber of the intermediate-stage transmission mechanism, wherein the oil spray hole adjacent to the intermediate-stage transmission mechanism can spray oil into the oil guide groove, so that the oil can flow along the oil guide groove into the bearing member of the intermediate-stage transmission mechanism to lubricate the bearing member. The oil guide groove can be opened according to actual conditions. For example, the second support wall 113 can also be provided with an oil guide groove to guide the oil sprayed from the oil injection hole into the corresponding bearing chamber, which will not be described in detail herein.

[0040] Optionally, the reducer 10 also includes an oil cooler 500 and a filter 400 connected to the pumping assembly. The filter 400 and the oil cooler 500 are both arranged outside the first accommodating space 104. The filter 400 is arranged adjacent to the oil pump 310. The oil cooler 500 is arranged on the peripheral side wall 112. The oil pipe 320 connects the filter 400 and the oil cooler 500, and the oil cooler 500 is also connected to the transmission channel 130. The transmission channel 130 is connected to the oil collecting tank 160. The oil pump 310 is used to pump the oil in the first accommodating space 104 to the filter 400, the filter 400 is used to filter the oil, the oil pipe 320 is used to divert the filtered oil to the oil cooler 500, the oil cooler 500 is used to cool the filtered oil, and the transmission channel 130 is used to divert the cooled oil to the oil collecting tank 160 and the corresponding area to be lubricated.

[0041] Specifically, in the embodiment of the present application, the oil pump 310 and the filter 400 are fixed on the first support wall 111, and the oil pump 310 and the filter 400 are arranged adjacent to each other, so that the number of parts of the reducer 10 can be effectively reduced by opening an oil passage on the first support wall 111 to connect the oil pump 310 and the filter 400. In addition, the oil pump 310 and the filter 400 are arranged adjacent to each other to reduce the length of the oil passage, thereby reducing the difficulty of manufacturing the housing assembly 100. Among them, the oil cooler 500 is a component for cooling the oil. The oil pumped by the oil pump 310 first passes through the filter 400, and the filter 400 filters the oil to reduce impurities in the oil. The output port of the filter 400 is connected to the input port of the oil cooler 500 through the oil pipe 320, and the output port of the oil cooler 500 is connected to the transmission channel 130. The filtered oil is guided to the oil cooler 500 through the oil pipe 320, and the oil cooler 500 cools the oil again. The cooled oil is then guided along the transmission channel 130 to the oil collecting pool 160 and multiple oil spray holes. Among them, the oil cooled by the oil cooler 500 can not only lubricate the lubrication area, but also cool the lubrication area. In addition, in the embodiment of the present application, the housing assembly 100 also serves as the housing of the drive motor. The housing assembly 100 forms a second accommodating space 102, wherein the stator core, stator winding, rotor and other components of the drive motor are arranged in the second accommodating space 102. The part of the housing assembly 100 used to form the housing of the drive motor is formed with an oil collecting pool 160, and the oil collecting pool 160 is arranged around the outer periphery of the end of the stator winding. The corresponding part of the housing assembly 100 used to form the housing of the drive motor is also formed with a plurality of oil spray holes arranged around the end of the stator winding. The oil cooled by the oil cooler 500 can be transmitted to the oil collecting pool 160 along the transmission channel 130, and gathered and pressurized at the oil collecting pool 160, and then sprayed to the end of the stator winding along the oil spray holes.

[0042] The oil cooler 500 and the filter 400 are two independent functional components, which are connected by an oil pipe 320. Based on this, there is no need to open an oil channel on the housing assembly 100 for connecting the oil cooler 500 and the filter 400, thereby reducing the difficulty of manufacturing the housing assembly 100. Therefore, the oil cooler 500 and the filter 400 are connected by the oil pipe 320, which can improve the layout flexibility of the oil cooler 500. For example, the oil cooler 500 is a component connected to the transmission channel 130, and the transmission channel 130 is an oil channel connected to the oil injection hole. The oil cooler 500 can be installed in an area close to the oil injection hole, thereby reducing the difficulty of opening the transmission channel 130.

[0043] Alternatively, if Figure 3 , Figure 4 and Figure 5As shown, the first supporting wall 111 is provided with a first bearing chamber 1110 for supporting an input-stage transmission mechanism, a second bearing chamber 1111 for an intermediate-stage transmission mechanism, and a third bearing chamber 1112 for supporting an output-stage transmission mechanism, and the second supporting wall 113 is provided with a fourth bearing chamber 1113 arranged opposite to the first bearing chamber 1110, a fifth bearing chamber 1114 arranged opposite to the second bearing chamber 1111, and a sixth bearing chamber 1115 arranged opposite to the fourth bearing chamber 1113, wherein the input-stage transmission mechanism is rotatably supported on the first bearing chamber 1110 and the fourth bearing chamber 1113 through a bearing member, the intermediate-stage transmission mechanism is supported on the second bearing chamber 1111 and the fifth bearing chamber 1114 through a bearing member, and the output-stage transmission mechanism is connected to the third bearing chamber 1112 and the sixth bearing chamber 1115 through a bearing member. The first support wall 111 is provided with a first oil guide groove 140 and a second oil guide groove 141, wherein the first oil guide groove 140 is in communication with the second bearing chamber 1111, and the second oil guide groove 141 is in communication with the third bearing chamber 1112. The second support wall 113 is provided with a third oil guide groove 142, and the third oil guide groove 142 is in communication with the sixth bearing chamber 1115. The area to be lubricated of the reduction assembly 200 may include connecting components, such as bearing components, transmission shafts, etc., respectively located in the first bearing chamber 1110, the second bearing chamber 1111, the third bearing chamber 1112, the fourth bearing chamber 1113, the fifth bearing chamber 1114, and the sixth bearing chamber 1115, and the area to be lubricated of the reduction assembly 200 may also include the meshing portion between the input stage transmission mechanism and the intermediate stage transmission mechanism, and the meshing portion between the intermediate stage transmission mechanism and the output stage transmission mechanism, etc. Of course, the area to be lubricated of the reduction assembly 200 is not limited to the areas to be lubricated listed above, and will not be described in detail herein.

[0044] The input stage transmission mechanism, the intermediate stage transmission mechanism and the output stage transmission mechanism are sequentially arranged along the arrangement direction x3, wherein the arrangement direction x3 is perpendicular to the axial direction x1 and the gravity direction x2. The transmission channel 130 includes a main transmission oil passage 131, a first branch oil passage 132, a second branch oil passage 133, a third branch oil passage 134, a fourth branch oil passage 135 and a fifth branch oil passage 136, wherein the main transmission oil passage 131 is connected to the output port of the oil cooler 500, and the main transmission oil passage 131 is arranged above the housing assembly 100 along the gravity direction x2, specifically, the main transmission oil passage 131 can be arranged above the top wall or the first support wall 111.

[0045] The main transmission oil passage 131 extends along the arrangement direction x3, and the first branch oil passage 132, the second branch oil passage 133 and the third branch oil passage 134 are connected to the main transmission oil passage 131 in sequence. Figure 3 and Figure 4As shown, the first branch oil passage 132 extends to the housing portion of the drive motor, and the first branch oil passage 132 is connected to the oil collecting tank 160 for directing the oil to the oil collecting tank 160 and the second accommodating space 102 .

[0046] like Figure 3 and Figure 5 As shown, the second branch oil passage 133 is connected with the main transmission oil passage 131, and the second branch oil passage 133 is arranged above the meshing position of the input stage transmission mechanism and the intermediate stage transmission mechanism along the gravity direction x2. Specifically, the peripheral side wall 112 located above the meshing position of the input stage transmission mechanism and the intermediate stage transmission mechanism along the gravity direction x2 is provided with the second branch oil passage 133 extending along the axial direction x1 and the first oil injection hole connected with the second branch oil passage 133. The oil is guided to the second branch oil passage 133 through the main transmission oil passage 131, and sprayed to the meshing position of the input stage transmission mechanism and the intermediate stage transmission mechanism through the first oil injection hole.

[0047] like Figure 3 and Figure 5 As shown, the third branch oil passage 134 is connected to the main transmission oil passage 131, and the third branch oil passage 134 is arranged above the meshing position of the output stage transmission mechanism and the intermediate stage transmission mechanism along the gravity direction x2. Specifically, the peripheral side wall 112 located above the meshing position of the output stage transmission mechanism and the intermediate stage transmission mechanism along the gravity direction x2 is provided with the third branch oil passage 134 extending along the axial direction x1 and a plurality of three oil injection holes arranged at intervals along the axial direction x1 and connected to the third branch oil passage 134, wherein the three oil injection holes are respectively the second oil injection hole, the third oil injection hole and the fourth oil injection hole arranged at intervals along the extended axial direction x1. The second oil injection hole is arranged adjacent to the first support wall 111, and is used to spray oil toward the first bearing chamber 1111 so as to indirectly spray the oil to the second bearing chamber 1111. The third oil injection hole is located between the first oil injection hole and the third oil injection hole, and is used to spray oil toward the meshing position of the intermediate stage transmission mechanism and the output stage transmission mechanism so as to directly spray the oil to the meshing position of the intermediate stage transmission mechanism and the output stage transmission mechanism. The third oil spray hole is disposed adjacent to the second supporting wall 113 and is used for spraying oil toward the third oil guide groove 142 , so as to indirectly spray the oil to the sixth bearing chamber 1115 .

[0048] like Figure 5As shown, the fourth branch oil passage 135 is arranged on the second support wall 113, the second branch oil passage 133 extends to the second support wall 113 along the axial direction x1 and is communicated with the fourth branch oil passage 135, the position where the second support wall 113 is provided with the fourth bearing chamber 1113 is provided with the fifth oil injection hole 137, the fourth branch oil passage 135 extends to the fifth oil injection hole 137 and is communicated with the fifth oil injection hole 137, the oil is guided to the fifth oil injection hole 137 through the fourth branch oil passage 135, and flows out to the fourth bearing chamber 1113 along the fifth oil injection hole 137. Optionally, the fifth oil injection hole 137 is coaxially arranged with the transmission shaft of the input stage transmission mechanism, the reducer 10 further includes a guide pipe (not shown), wherein the fifth oil injection hole 137 is also used to plug the guide pipe so that the guide pipe is communicated with the fourth branch oil passage 135, the guide pipe extends to the second accommodation space 102 along the axial direction x1, and is used to guide the oil to the second accommodation space 102. Specifically, the transmission shaft of the input-stage transmission mechanism may be a hollow shaft, and the flow guide tube may be arranged inside the transmission shaft of the input-stage transmission mechanism.

[0049] like Figure 1 and Figure 5 As shown, the second support wall 113 is also provided with a fifth branch oil channel 136, and the fourth branch oil channel 135 extends to be connected with the fifth branch oil channel 136, wherein the position where the fifth bearing chamber 1114 is provided on the second support wall 113 is provided with a sixth oil injection hole connected with the fifth bearing chamber 1114, and the fifth branch oil channel 136 is connected to the sixth oil injection hole, and the oil is guided to the sixth oil injection hole through the fifth branch oil channel 136, and flows out to the fifth bearing chamber 1114 along the sixth oil injection hole.

[0050] Alternatively, if Figure 3 As shown, the oil pipe 320 is arranged below the first bearing chamber 1110, the second bearing chamber 1111 and the third bearing chamber 1112 along the gravity direction x2, and the oil pipe 320 crosses the first bearing chamber 1110, the second bearing chamber 1111 and the third bearing chamber 1112 along the arrangement direction x3, and a first pair of interfaces (not marked in the figure) and a second pair of interfaces (not marked in the figure) are provided on the first support wall 111, the first pair of interfaces is connected to the output port of the filter 400, and the second pair of interfaces is connected to the input port of the oil cooler 500, and the two ends of the oil pipe 320 along the arrangement direction x3 are respectively connected to the first pair of interfaces and the second pair of interfaces to connect the filter 400 and the oil cooler 500. Optionally, a partial section of the oil pipe 320 is arranged adjacent to the third bearing chamber 1112, wherein the section of the oil pipe 320 adjacent to the third bearing chamber 1112 is provided with two oil nozzles, the two oil nozzles are connected to the oil pipe 320, and the oil in the oil pipe 320 can be sprayed out through the oil nozzles respectively, one of the two oil nozzles sprays oil toward the second oil guide groove 141, and the other of the two oil nozzles directly sprays oil toward the third bearing chamber 1112.

[0051] Optionally, Figure 3 As shown, the reducer 10 further includes a magnetic member (not shown), the bottom wall 1121 is provided with a mounting groove 151, the mounting groove 151 is provided adjacent to the oil inlet 150, and the magnetic member is provided in the mounting groove 151. Before the oil enters the oil pump 310 through the oil inlet 150, the magnetic member can absorb metallic impurities in the oil through magnetic attraction, thereby filtering the oil, thereby reducing damage to the oil pump 310 caused by the oil.

[0052] Alternatively, if Figure 3 and Figure 4 As shown, the housing assembly 100 as described above also serves as the housing of the drive motor, wherein the housing assembly 100 is formed with a second accommodation space 102 for accommodating components such as the stator core, stator winding and rotor of the drive motor, the first accommodation space 104 and the second accommodation space 102 are respectively located on both sides of the first support wall 111 along the axial direction x1, and the transmission channel 130 and the oil collecting pool 160 are also configured to transmit oil to the second accommodation space 102, wherein the first support wall 111 is provided with an oil return port (not marked in the figure) connecting the first accommodation space 104 and the second accommodation space 102, and the oil flowing into the second accommodation space 102 through the oil collecting pool 160 and the transmission channel 130 can flow back to the first accommodation space 104 along the oil return port. A magnetic member can also be provided near the bottom wall 1121 at the oil return port, so as to filter the oil flowing back to the first accommodation space 104 through the magnetic member, so as to reduce the content of metallic impurities in the oil in the first accommodation space 104.

[0053] Alternatively, if Figure 2 , Figure 3 and Figure 5 As shown, the shell assembly 100 includes a first shell 110 and a second shell 120 that cooperates with the first shell 110 along the axial direction x1, wherein the first shell 110 forms a first accommodating cavity 101, and the second shell 120 forms a second accommodating cavity 103. The first shell 110 includes a first supporting wall 111 and a first sub-peripheral side wall 112 arranged around the first supporting wall 111, and the first supporting wall 111 and the first sub-peripheral side wall 112 are arranged to form the first accommodating cavity 101. The second shell 120 includes a second supporting wall 113 and a second sub-side wall arranged around the second supporting wall 113, and the second supporting wall 113 and the second sub-peripheral side wall 112 are arranged to form the second accommodating cavity 103. The first shell 110 and the second shell 120 are detachably matched along the axial direction x1 to match the first accommodating cavity 101 with the second accommodating cavity 103 to form a first accommodating space 104.

[0054] Optionally, the present application also proposes a vehicle, which includes a reducer 10 according to any of the above embodiments and a drive motor, wherein the drive motor is connected to a reduction assembly 200 .

[0055] It is worth noting that the drawings in this article are only intended to illustrate the structural relationship and connection relationship of the invention product of this application, and do not limit the specific structural dimensions of the invention product of this application.

[0056] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A reducer, characterized in that: The reducer is connected to the output shaft of the driving motor, and the reducer comprises: The housing assembly is provided with a first accommodation space; A speed reduction assembly is disposed in the first accommodation space, and the first accommodation space is configured to accommodate oil for lubricating the speed reduction assembly; A pumping assembly, used for pumping the oil to the lubricated area of ​​the reduction assembly, the pumping assembly comprising an oil pump and an oil pipe connected to the oil pump, the oil pump is arranged outside the first accommodating space, and the oil pipe is arranged inside the first accommodating space; In which, a transmission channel and an oil collecting tank are formed on the housing assembly, and the transmission channel cooperates with the oil pipe to transmit the oil to multiple areas to be lubricated of the reduction assembly. The oil collecting tank is arranged above the housing assembly in the direction of gravity and is connected to the transmission channel or the oil pipe. The oil stored in the oil collecting tank can be transported to the area to be cooled of the drive motor.

2. The reducer according to claim 1, characterized in that: The ratio of the volume of the oil collecting pool to the total storage volume of the oil is set to 0.05-0.

15.

3. The reducer according to claim 1, characterized in that: The housing assembly is formed with a plurality of oil spray holes, and the plurality of oil spray holes are arranged corresponding to the plurality of areas to be lubricated, the transmission channel is connected to the corresponding oil spray holes, and the plurality of oil spray holes are at least partially located in the upper area of ​​the area to be lubricated along the gravity direction, and the oil spray holes are used to directly or indirectly spray the oil to the area to be lubricated.

4. The reducer according to claim 3, characterized in that: The housing component is provided with an oil inlet, which is arranged adjacent to the bottom of the housing component along the gravity direction, and is communicated with the oil pump, which is used to pump the oil through the oil inlet.

5. The reducer according to claim 4, characterized in that: The housing assembly includes a circumferential side wall, a first support wall and a second support wall, wherein the circumferential side wall, one or both of the first support wall and the second support wall form the transmission channel, the first support wall and the second support wall are arranged relatively spaced apart along the axial direction of the output shaft of the driving motor, the circumferential side wall is connected between the first support wall and the second support wall to form the first accommodating space together with the first support wall and the second support wall, the first support wall and the second support wall are used to support the deceleration assembly, the circumferential side wall includes a bottom wall and a top wall arranged relatively along the gravity direction, one of the first support wall and the second support wall is provided with the oil inlet, the oil inlet is arranged close to the bottom wall or at least part of the bottom edge of the oil inlet is in contact with the bottom wall.

6. The reducer according to claim 5, characterized in that: The oil inlet includes a first size and a second size, the first size is parallel to the gravity direction, the second size is perpendicular to the gravity direction, and the maximum value of the second size is greater than the maximum value of the first size.

7. The reducer according to claim 6, characterized in that: The oil inlet is arranged in a crescent shape, a semicircular shape, a flat and long shape, or an elliptical shape.

8. The reducer according to claim 5, characterized in that: The first supporting wall and the second supporting wall are provided with a plurality of bearing chambers for supporting the reduction assembly, and the reduction assembly at least includes an output-stage transmission mechanism, an intermediate-stage transmission mechanism and an input-stage transmission mechanism respectively connected to the corresponding bearing chambers, a rotating shaft of the input-stage transmission mechanism is connected to the output shaft of the drive motor, the output-stage transmission mechanism is used to be connected to a load, and the intermediate-stage transmission mechanism connects the input-stage transmission mechanism and the output-stage transmission mechanism to achieve output reduction of the drive motor, and the first supporting wall and / or the second supporting wall are also provided with an oil guide groove connected to the corresponding bearing chamber, and at least part of the oil spray holes are used to spray the oil to the oil guide groove so that the oil can be guided along the oil guide groove to the corresponding bearing chamber.

9. The reducer according to claim 5, characterized in that: The reducer also includes an oil cooler and a filter connected to the oil pump, the filter and the oil cooler are both arranged outside the first accommodating space, the filter is arranged adjacent to the oil pump, the oil cooler is arranged on the peripheral side wall, the oil pipe connects the filter and the oil cooler, and the oil cooler is also connected to the transmission channel, the transmission channel is communicated with the oil collecting tank, the oil pump is used to pump the oil in the first accommodating space to the filter, the filter is used to filter the oil, the oil pipe is used to guide the oil that has been filtered to the oil cooler, the oil cooler is used to cool the oil that has been filtered, and the transmission channel is used to guide the oil that has been cooled to the oil collecting tank and the corresponding area to be lubricated.

10. A vehicle, characterized in that: It comprises the reducer according to any one of claims 1 to 9 and a drive motor, wherein the drive motor is connected to the reduction assembly.

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