A method for ensuring oil supply to bearings at both ends of a reducer input shaft

Abstract

The application discloses a method for ensuring oil supply of bearings at both ends of a reducer input shaft, which comprises the following steps: 1, intercepting sufficient splashed lubricating oil in the reducer space above the input shaft; 2, collecting the intercepted lubricating oil and enabling the collected lubricating oil to flow into a left bearing position on the left side and a right bearing position on the right side respectively; and 3, performing minimum guarantee distribution on the collected lubricating oil, so that the collected lubricating oil is prevented from flowing to the bearing position on the outside of the lane under the action of centrifugal force when the vehicle is running in a curve, and the bearing position on the inside of the lane is completely cut off. Step 1 is to set an intercepting plate in the axial direction of the input shaft. Step 2 is to set an oil collecting groove below the intercepting plate, and set a left oil leakage port and a right oil leakage port for leaking oil to the left bearing position and the right bearing position respectively at both ends of the oil collecting groove. Step 3 is to set a flow distribution point in the oil collecting groove, and set a flow distribution block on the flow distribution point, so that the oil collecting groove is divided into a left oil collecting groove and a right oil collecting groove by the flow distribution block.

Description

TECHNICAL FIELD

[0001] The application relates to a method for ensuring oil supply of bearings at both ends of an input shaft of a speed reducer, and belongs to the technical field of lubrication of speed reducers. BACKGROUND

[0002] A new energy electric vehicle speed reducer is a three-in-one speed reducer integrating a motor, a speed reducer and a differential. An input shaft in the speed reducer is generally directly connected with a motor shaft through a spline, or the input shaft and the motor shaft are the same shaft. The input shaft has bearings installed on a front housing and a rear housing of the speed reducer. According to the installation mode of the speed reducer on the electric vehicle, a front input bearing and a rear input bearing are respectively located on the left side and the right side of the vehicle. In addition to the input shaft, the speed reducer also has a main reduction gear shaft and an output shaft, and each of the shafts has its own bearing installed on the front housing and the rear housing. Lubrication of all the gears and bearings in the speed reducer mainly relies on the rotation of the main reduction gear to stir up the lubricating oil accumulated at the bottom of the speed reducer to form splashing lubricating oil. Part of the splashing lubricating oil directly splashes on the gears to lubricate the gears, and part of the splashing lubricating oil falls into oil channels constructed on the walls of the front housing and the rear housing, and is guided into the bearing positions of the transmission shafts to supply oil to the bearings for lubrication.

[0003] In recent years, with the light-weighting of new energy electric drive, the duty cycle requirement is higher and higher, and the motor of the electric drive develops towards high speed, so the speed of the bearings in the speed reducer is higher, especially the speed of the input shaft bearings, which has increased from several thousand revolutions per minute to more than 12,000 revolutions per minute. Therefore, higher requirements are put forward for lubrication, and sufficient splashing lubricating oil is needed to lubricate the bearings to improve the lubrication effect of the bearings. At the same time, the heat generated by the bearings needs to be reduced and taken away by the flowing lubricating oil.

[0004] With the development of road traffic, the road conditions are getting better and better. The roads in the suburbs and rural areas, especially the continuous mountain roads in the mountains, are hardening. The speed of the vehicles driving on the curves is increasing. Whether it is the lubricating oil accumulated at the bottom of the speed reducer, the splashing lubricating oil or the lubricating oil entering the oil channels, they will all flow to the outside of the curve under the action of centrifugal force formed during fast driving on the curve, resulting in insufficient lubricating oil supply to the bearings on the inside of the curve. If the vehicle enters a curve in the same direction continuously, the bearings on the inside of the curve will be starved for a long time, which will inevitably lead to different degrees of wear and ablation of the bearings and shorten the service life of the bearings.

[0005] On the other hand, the main reduction gear in the speed reducer, which mainly plays a splashing role, is a helical gear. When the main reduction gear rotates, the stirred-up lubricating oil will flow to one side of the speed reducer along the helical gear, which will also cause the splashing lubricating oil to be more on one side of the speed reducer and less on the other side, resulting in insufficient lubricating oil supply to the bearings on the side with less splashing lubricating oil.

[0006] In summary, for the housing oil way design, the splash lubrication oil guide structure design difficulty is more and more big, only through the traditional design of oil guide rib in the housing cavity, the way of opening slot on the bearing mounting hole, already can not completely satisfy the lubrication requirement of input shaft front and rear bearing. SUMMARY

[0007] The technical problem to be solved by the present application is how to make the bearings at both ends of the input shaft continuously obtain lubricating oil under any road conditions.

[0008] To solve the above problems, the technical solution provided by the present application is:

[0009] A method for ensuring oil supply to bearings at both ends of a reducer input shaft, comprising the following steps:

[0010] I. Intercepting sufficient splash lubricating oil in the space of the reducer above the input shaft;

[0011] II. Collecting the intercepted lubricating oil and enabling the collected lubricating oil to flow into the left bearing position on the left side and the right bearing position on the right side, respectively;

[0012] III. Implementing minimum guaranteed distribution of the collected lubricating oil to avoid that, when the vehicle enters curve driving, the collected lubricating oil all flows to the bearing position on the outside of the lane under the action of centrifugal force, resulting in complete interruption of supply to the bearing position on the inside of the lane.

[0013] Step I is to set an intercepting plate in the axial direction of the input shaft.

[0014] Step II is to set an oil collecting groove below the intercepting plate, and set a left oil leakage port and a right oil leakage port for leaking oil to the left bearing position and the right bearing position, respectively, at both ends of the oil collecting groove.

[0015] Step III is to establish a flow distribution point in the oil collecting groove, and set a flow distribution block on the flow distribution point, so as to divide the oil collecting groove into a left oil collecting groove and a right oil collecting groove by the distribution block.

[0016] Further, the collected lubricating oil is dynamically and sufficiently distributed, so that the left bearing position and the right bearing position can obtain sufficient lubricating oil when the vehicle is driving in a straight line or a curve.

[0017] Further, the flow distribution adjusting section is established in the oil collecting groove, the flow distribution point is located in the middle of the flow distribution adjusting section, and the flow distribution block can slide in the flow distribution adjusting section; when the vehicle is driving straight, the flow distribution block is located at the flow distribution point; when the vehicle is turning right, the flow distribution block slides to the left, the length of the left oil collecting groove is shortened, and a part of the lubricating oil that tends to be splashed to the left of the intercepting plate under the action of centrifugal force flows into the right oil collecting groove; when the vehicle is turning left, the flow distribution block slides to the right, the length of the right oil collecting groove is shortened, and a part of the lubricating oil that tends to be splashed to the right of the intercepting plate under the action of centrifugal force flows into the left oil collecting groove.

[0018] Further, the flow distribution block slides in the flow distribution adjusting section of the oil collecting groove in the same direction as the direction in which the splashed lubricating oil is splashed more under the action of centrifugal force when the vehicle is turning.

[0019] Further, when the vehicle is driving straight, the flow distribution block is located at the flow distribution point by concavely arranging the flow distribution adjusting section and locating the flow distribution point at the lowest point, so that the flow distribution block that slides to the left or to the right can automatically return to the flow distribution point when the centrifugal force is reduced or removed.

[0020] Further, when the vehicle is driving straight, the flow distribution block is located at the flow distribution point by horizontally arranging the flow distribution adjusting section in the concave direction of the arc that is consistent with the direction in which the lubricating oil is splashed, and locating the flow distribution point at the top of the concave arc, so that the part of the flow distribution block that is higher than the oil collecting groove can bear the impact of the splashed lubricating oil after the flow distribution block slides to the left or to the right, and the flow distribution block can slide to the flow distribution point and return when the centrifugal force is reduced or removed by the component force of the impact force of the splashed lubricating oil in the concave direction of the arc.

[0021] Further, the part of the flow distribution block that is higher than the oil collecting groove is arranged as a rain sail with a left oil receiving surface and a right oil receiving surface, so that when the flow distribution block slides to the right in the concave arc-shaped flow distribution adjusting section, the right oil receiving surface gradually turns to the direction from which the splashed lubricating oil comes by arc sliding, and then the oil receiving amount of the right oil receiving surface is greater than that of the left oil receiving surface, so that the flow distribution block obtains a greater component force for returning to the flow distribution point by the impact force of the splashed lubricating oil on the right oil receiving surface; when the flow distribution block slides to the left in the concave arc-shaped flow distribution adjusting section, the left oil receiving surface gradually turns to the direction from which the splashed lubricating oil comes by arc sliding, and then the oil receiving amount of the left oil receiving surface is greater than that of the right oil receiving surface, so that the flow distribution block obtains a greater component force for returning to the flow distribution point by the impact force of the splashed lubricating oil on the left oil receiving surface. Beneficial effects

[0022] 1. When the vehicle is running in curve, the left bearing position (front bearing position) and the right bearing position (rear bearing position) of the input shaft can obtain sufficient lubricating oil supply, at least the lubricating oil supply of one side bearing position will not be interrupted;

[0023] 2. The centrifugal force, vibration, and the force of gravity or splashing lubricating oil are reasonably utilized, and the oil distribution can be automatically completed without manual operation and complex system control;

[0024] 3. The structure is simple, and the manufacturing and assembling are easy. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a partial sectional view of the speed reducer;

[0026] Figure 2 is a partial sectional view of the speed reducer; Figure 1

[0027] Figure 3 is a perspective view of a product made according to the method of embodiment one;

[0028] Figure 4 is a perspective view of a product made according to the method of embodiment two, wherein the straight arrow indicates that the flow distribution block can slide left and right;

[0029] Figure 5 is a perspective view of the bottom of the oil collecting groove according to embodiment two, wherein the bottom of the oil collecting groove is concave under the flow distribution adjusting section;

[0030] Figure 6 is a perspective view of the flow distribution block according to embodiment two;

[0031] Figure 7 is a perspective view of a product made according to the method of embodiment three, wherein the straight arrow indicates that the flow distribution block can slide left and right, and the flow distribution block is shown at the flow distribution point;

[0032] Figure 8 is a perspective view of the flow distribution block according to embodiment three;

[0033] Figure 9 is another perspective view of the product shown in Figure 7 , wherein the flow distribution block has slid to the right, and the right oil collecting groove is shortened;

[0034] Figure 10 is another perspective view of the product shown in Figure 9 ​The force analysis diagram of the flow distribution block under the impact of splashed lubricating oil is shown in the figure. In the figure: F1 is the impact force of splashed lubricating oil on the right side of the flow distribution block 4, the oil surface 412, F2 is the impact force of splashed lubricating oil on the left side of the flow distribution block 4, the oil surface 411, F is the resultant force of F1 and F2 on the flow distribution block 4, and F3 is the component force generated by F that causes the flow distribution block 4 to return to the left flow distribution point 215 and slide back. When the vehicle turns left, and the centrifugal force to the right generated by the flow distribution block 4 is less than the left component force F3 of the impact force of splashed lubricating oil on the flow distribution block 4, the flow distribution block 4 will return to the left flow distribution point 215 and slide back.

[0035] In the diagram: 1. Interceptor plate; 2. Slot seat; 21. Oil collection trough; 210. Flow distribution adjustment section; 211. Left oil collection trough; 212. Right oil collection trough; 213. Left oil drain port; 214. Right oil drain port; 215. Flow distribution point; 22. Reverse oil collection trough; 3. Connecting pipe; 31. Pipe hole; 4. Flow distribution block; 41. Rain sail; 411. Left oil receiving surface; 412. Right oil receiving surface; 5. Reducer; 51. Front housing; 511. Left bearing position; 512. Mounting hole; 513. Oil drain hole; 52. Rear housing; 521. Right bearing position; 6. Input shaft; 61. Bearing; 7. Main reduction gear; 8. Limit guide plate. Detailed Implementation

[0036] To facilitate understanding of the present invention, the reducer involved in this application will be briefly described below with reference to the accompanying drawings.

[0037] like Figure 1 As shown, the reducer 5 involved in this application is a new energy electric vehicle reducer 5, which is integrated with the motor and differential. The input shaft 6 inside the reducer 5 is generally directly connected to the motor shaft via a spline, or the input shaft 6 and the motor shaft are on the same shaft. The input shaft 6 has bearings 61 on both the front housing 51 and the rear housing 52 of the reducer 5. The position of the input shaft bearing 61 on the front housing 51 is called the front bearing position of the input shaft 6. The lubrication supply of the input shaft bearing 61 on the front housing is only described in this application up to the lubrication supply of the front bearing position. The position of the input shaft bearing 61 on the rear housing 52 is called the rear bearing position of the input shaft 6. The lubrication supply of the input shaft bearing 61 on the rear housing is only described in this application up to the lubrication supply of the rear bearing position. In addition to the input shaft 6, the reducer 5 also has a main reduction gear shaft and an output shaft, and each of them has its own mounting bearings on the front housing 51 and the rear housing 52 (not involved in this application). The lubrication of all gears and bearings in the reducer 5 mainly relies on the rotation of the main reduction gear 7 in the reducer 5 to agitate and splash the lubricating oil accumulated at the bottom of the reducer, forming splash lubricating oil. Part of the splash lubricating oil directly splashes onto the gears to lubricate them, while part falls into the oil passages built on the walls of the front housing 51 and the rear housing 52 in the reducer 5, and is then guided through the oil passages to the bearing positions of each transmission shaft to supply oil lubrication to each bearing.

[0038] According to the installation method of the reducer 5 on the electric vehicle, the front housing 51 and the rear housing 52 are located on the left and right sides of the vehicle, respectively. For ease of description and interpretation, in this application, the front bearing position of the input shaft 6 is defined as the left bearing position 511, and the rear bearing position of the input shaft 6 is defined as the right bearing position 521.

[0039] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1

[0040] like Figure 1 As shown in Figure 3, a method for ensuring oil supply to the bearings at both ends of the input shaft of a reducer includes the following steps:

[0041] 1. Intercept sufficient splashed lubricating oil in the reducer space above input shaft 6;

[0042] 2. Collect the intercepted lubricating oil and allow the collected lubricating oil to flow into the left bearing position 511 on the left side and the right bearing position 521 on the right side respectively.

[0043] Third, implement minimum guaranteed distribution of lubricating oil to prevent the lubricating oil from flowing entirely to the bearing positions on the outer side of the lane under the action of centrifugal force when the vehicle enters a curve, thus avoiding a complete supply interruption to the bearing positions on the inner side of the lane.

[0044] This ensures that when the vehicle is turning, the bearing 61 in the bearing position on the inside of the lane will not dry-grind due to lack of oil supply, thus preventing the bearing 61 on that side of the input shaft 6 from being worn or burned.

[0045] Step one, which involves intercepting a sufficient amount of splashed lubricating oil in the reducer space above the input shaft 6, involves setting an interceptor plate 1 along the axial direction of the input shaft 6. The size of the interceptor plate 1 is determined to be sufficient to intercept the amount of lubricating oil required to simultaneously lubricate the bearings 61 in the left and right bearing positions.

[0046] Step two involves collecting the intercepted lubricating oil and ensuring it flows into the left bearing seat 511 on the left and the right bearing seat 521 on the right. This is achieved by installing an oil collection trough 21 below the interceptor plate 1, allowing the intercepted lubricating oil to flow directly downwards into the trough. A left oil drain port 213 and a right oil drain port 214 are installed at both ends of the oil collection trough 21, allowing lubricating oil to flow out of the left bearing seat 511 and the right bearing seat 521, respectively. Specifically, the left oil drain port 213 and the right oil drain port 214 can be ports at both ends of the oil collection trough 21 that allow lubricating oil to flow out.

[0047] The step three said that the intercepted lubricating oil is collected, and the collected lubricating oil is able to flow into the left bearing position 511 on the left side and the right bearing position 521 on the right side respectively, which is to establish a flow distribution point 215 in the oil collecting groove 21, and to set a flow distribution block 4 on the flow distribution point 215, and to divide the oil collecting groove 21 into a left oil collecting groove 211 and a right oil collecting groove 212 by the distribution block.

[0048] Since the main reduction gear 7 in the reduction gear 5 is a helical gear, the amount of splashed lubricating oil is larger on one side and smaller on the other side, so the flow distribution point 215 deviates from the midpoint of the oil collecting groove 21 according to the direction of the helical gear. According to the general setting, the amount of splashed lubricating oil is larger on the left side, i.e. the front housing 51, so the flow distribution point 215 deviates to the left side of the oil collecting groove 21.

[0049] The embodiment selects to fix the distribution block at the flow distribution point 215, so that when the vehicle is turning, the distribution block can block the lubricating oil in one side of the oil groove from flowing completely to the other side, and force the collected lubricating oil in the oil groove to still flow to the oil leakage hole on the side, so as to ensure that the bearing 61 on the side has a basic oil supply guarantee. Embodiment two

[0050] As shown in Figure 1 , 2 , 4, 5, 6, which is different from embodiment one, the collected lubricating oil is dynamically and adequately distributed, so that the left bearing position 511 and the right bearing position 521 can obtain adequate lubricating oil when the vehicle is driving in a straight line or a curve. The problem of the embodiment is that when the vehicle enters curve driving, the splashed lubricating oil will deviate to one side under the action of centrifugal force, so that the amount of lubricating oil splashed on the intercepting plate 1 on the side opposite to the turning direction increases, and the amount of lubricating oil splashed on the intercepting plate 1 on the side consistent with the turning direction decreases, which will lead to insufficient lubricating oil on the bearing position on the side. To avoid this phenomenon, the measures are:

[0051] A flow distribution adjustment section 210 is established in the oil collecting groove 21, the flow distribution point 215 is located in the middle of the flow distribution adjustment section 210, and the flow distribution block 4 is able to slide in the flow distribution adjustment section 210; when the vehicle is driving in a straight line, the flow distribution block 4 is located at the flow distribution point 215; when the vehicle is turning to the right, the flow distribution block 4 slides to the left, shortens the length of the left oil collecting groove 211, and makes part of the lubricating oil splashed to the left side of the intercepting plate under the action of centrifugal force flow into the right oil collecting groove 212; when the vehicle is turning to the left, the flow distribution block 4 slides to the right, shortens the length of the right oil collecting groove 212, and makes part of the lubricating oil splashed to the right side of the intercepting plate under the action of centrifugal force flow into the left oil collecting groove 211.

[0052] The aforementioned sliding of the flow distribution block 4 within the flow distribution adjustment section 210 utilizes the centrifugal force generated when the vehicle turns, which is opposite to the turning direction. This causes the flow distribution block 4 to slide within the flow distribution adjustment section 210 of the oil collection tank 21 in the same direction as the direction in which the splashed lubricating oil is more concentrated due to centrifugal force. That is, when the vehicle turns left, a rightward centrifugal force is generated, causing the splashed lubricating oil to deflect to the right, resulting in more splashing on the right side. At this time, the flow distribution block 4 is also used to slide to the right using this centrifugal force, shortening the length of the right-side oil collection tank 212 as described above. This allows a portion of the lubricating oil that tends to splash to the right side due to centrifugal force to flow into the left-side oil collection tank 211. When the vehicle turns right, the sliding adjustment of the flow distribution block 4 follows the same principle.

[0053] When the vehicle enters straight-line driving, the flow distribution block 4 must be returned to the flow distribution point 215 or near the flow distribution point 215. The method to achieve this is to set the flow distribution adjustment section 210 to be recessed so that the flow distribution point 215 is at the lowest point. By using gravity and vehicle running vibration, the flow distribution block 4, which has slid to the left or right, can automatically reset to the flow distribution point 215 when the centrifugal force is reduced or released.

[0054] In this way, when the vehicle moves from straight driving to driving on a curve, or from driving on a curve to driving on a straight road, the flow distribution block 4 can automatically adjust its position to achieve immediate and sufficient distribution of lubricating oil between the left bearing position 511 and the right bearing position 521. Example 3

[0055] like Figure 1 , 2 As shown in Figures 7, 8, 9, and 10, the difference from Embodiment 2 is that the flow distribution adjustment section 210 is set in a concave arc shape with the horizontal concave direction consistent with the direction of lubricating oil splashing, so that the flow distribution point 215 is located at the apex of the concave arc, and the flow distribution block 4 has a part that is higher than the oil collection groove 21. After the flow distribution block 4 slides to the left or right, the part that is higher than the oil collection groove 21 can withstand the impact of splashed lubricating oil. When the centrifugal force is reduced or released, the impact force of splashed lubricating oil is used to slide the flow distribution block 4 back to the flow distribution point 215 by the component force of the concave arc apex.

[0056] Further, the part of the flow distribution block 4 above the oil collecting groove 21 is provided with a rain canopy 41 having a left oil receiving surface 411 and a right oil receiving surface 412. When the flow distribution block 4 slides to the right along the concave arc-shaped flow distribution adjusting section 210, the right oil receiving surface 412 gradually turns to the direction of the splashing lubricating oil, and the amount of oil received by the right oil receiving surface 412 is greater than that of the left oil receiving surface 411. The impact of the splashing lubricating oil on the right oil receiving surface 412 makes the flow distribution block 4 obtain a greater force for returning to the flow distribution point 215. When the flow distribution block 4 slides to the left along the concave arc-shaped flow distribution adjusting section 210, the left oil receiving surface 411 gradually turns to the direction of the splashing lubricating oil, and the amount of oil received by the left oil receiving surface 411 is greater than that of the right oil receiving surface 412. The impact of the splashing lubricating oil on the left oil receiving surface 411 makes the flow distribution block 4 obtain a greater force for returning to the flow distribution point 215.

[0057] Figure 10 Fig. 6 shows the force analysis diagram of the flow distribution block 4 after it slides to the right. F1 is the impact of the splashing lubricating oil on the right oil receiving surface 412 of the flow distribution block 4, F2 is the impact of the splashing lubricating oil on the left oil receiving surface 411 of the flow distribution block 4, F is the resultant force of F1 and F2 on the flow distribution block 4, and F3 is the force of F for returning the flow distribution block 4 to slide to the left flow distribution point 215. When the centrifugal force of the flow distribution block 4 formed by the turning of the vehicle to the left is smaller than the left force F3 of the impact of the splashing lubricating oil on the flow distribution block 4, the flow distribution block 4 slides to the left flow distribution point 215.

[0058] On the top surface of the intercepting plate 1 of the actual product, a limiting guide plate 8 is arranged for limiting and guiding the flow distribution block 4.

[0059] As in Embodiment Two, when the vehicle changes from straight driving to curve driving, or is driving in a curve, or changes from curve driving to straight driving, the flow distribution block 4 can automatically adjust the position to realize the instant and sufficient distribution of lubricating oil to the left bearing position 511 and the right bearing position 521. The difference between this embodiment and Embodiment Two is that the flow distribution block 4 is slightly simpler.

[0060] As Figure 1 , 2The device for ensuring oil supply to the bearings 61 at both ends of the input shaft 6, which is made according to the above method, comprises a hollow insertion pipe 3 for installation, an intercepting plate 1 and a groove seat 2 with an oil collecting groove 21, the intercepting plate 1 is erected in the oil collecting groove 21 and is fixedly connected with or integrally formed with the groove seat 2, the left end of the groove seat 2 is fixedly connected with or integrally formed with the insertion pipe 3, so that the oil collecting groove 21 is communicated with the pipe hole 31 of the insertion pipe 3. A horizontal installation hole 512 is formed in the front shell 51 above the left bearing position 511, and an oil leakage hole 513 is formed to communicate the left bearing position 511 and the installation hole 512. During installation, the insertion pipe 3 of the device is inserted into the installation hole 512 with force. After installation, the lubricating oil in the left oil collecting groove 211 can enter the left bearing position 511 through the left oil leakage hole 213, the pipe hole 31 of the insertion pipe 3 and the oil leakage hole 513; the right oil leakage hole 214 of the right oil collecting groove 212 is located above the right bearing position 521, and the lubricating oil in the right oil collecting groove 212 falls into the right bearing position 521 through the right oil leakage hole 214.

[0061] In the actual product, there is a reverse oil collecting groove 22 behind the oil collecting groove 21 for distributing lubricating oil when the main reduction gear 7 is reversed during the car reversing, which is only shown in the drawings and is not within the protection scope of the present application.

[0062] The above embodiments are only used for more clearly describing the present application and cannot be regarded as limiting the protection scope of the present application, and any equivalent modification shall be regarded as falling within the protection scope of the present application.

Claims

1. A method of providing oiling assurance to bearings at both ends of a reducer input shaft, characterized by Comprising the following steps: I. Intercepting sufficient splashed lubricating oil in the reducer space above the input shaft (6); II. Collecting the intercepted lubricating oil and enabling the collected lubricating oil to flow into the left bearing position (511) on the left side and the right bearing position (521) on the right side respectively; III. Implementing minimum guaranteed distribution of the collected lubricating oil to avoid that the collected lubricating oil flows to the bearing position on the outside of the lane under the action of centrifugal force when the vehicle is driving in a curve, resulting in complete interruption of supply to the bearing position on the inside of the lane; Step III is to establish a flow distribution point (215) in the oil collecting groove (21), and set a flow distribution block (4) on the flow distribution point (215), which divides the oil collecting groove (21) into a left oil collecting groove (211) and a right oil collecting groove (212). Implementing dynamic sufficient distribution of the collected lubricating oil to enable the left bearing position (511) and the right bearing position (521) to obtain sufficient lubricating oil when the vehicle is driving in a straight line or a curve.

2. The method of claim 1, wherein the bearings at both ends of the input shaft of the reduction gear are ensured of oil supply, characterized by, Step I is to set an intercepting plate (1) according to the axial direction of the input shaft (6).

3. The method of claim 2, wherein the bearings at both ends of the input shaft of the reduction gear are ensured of oil supply, characterized by, Step II is to set an oil collecting groove (21) below the intercepting plate (1), and set a left oil leakage port (213) and a right oil leakage port (214) at both ends of the oil collecting groove (21) respectively for leaking oil to the left bearing position (511) and the right bearing position (521).

4. The method of claim 1, wherein the bearings at both ends of the input shaft of the speed reducer are ensured of oil supply. Establishing a flow distribution adjustment section (210) in the oil collecting groove (21) to enable the flow distribution point (215) to be located in the middle of the flow distribution adjustment section (210) and enable the flow distribution block (4) to slide in the flow distribution adjustment section (210); when the vehicle is driving in a straight line, enabling the flow distribution block (4) to be located at the flow distribution point (215); when the vehicle is turning right, enabling the flow distribution block (4) to slide left, shorten the length of the left oil collecting groove (211), and enable part of the lubricating oil that is splashed to the left side of the intercepting plate under the action of centrifugal force to flow into the right oil collecting groove (212); when the vehicle is turning left, enabling the flow distribution block (4) to slide right, shorten the length of the right oil collecting groove (212), and enable part of the lubricating oil that is splashed to the right side of the intercepting plate under the action of centrifugal force to flow into the left oil collecting groove (211).

5. The method of claim 4, wherein the bearings at both ends of the input shaft of the reduction gear are ensured of oil supply, characterized by, It is to use the centrifugal force in the opposite direction to the turning direction of the vehicle when the vehicle is turning to enable the flow distribution block (4) to slide in the flow distribution adjustment section (210) of the oil collecting groove (21) in the same direction as the direction in which the splashed lubricating oil is splashed more.

6. The method of claim 5, wherein the bearings at both ends of the input shaft of the reduction gear are ensured of oil supply. When the vehicle is driving in a straight line, the flow distribution block (4) is located at the flow distribution point (215), which is to set the flow distribution adjustment section (210) concave, enable the flow distribution point (215) to be located at the lowest point, and enable the flow distribution block (4) to automatically reset to the flow distribution point (215) when the centrifugal force is reduced or removed.

7. The method of claim 5, wherein the bearings at both ends of the input shaft of the reduction gear are ensured of oil supply. The flow distribution block (4) is located at the flow distribution point (215) when the vehicle is driving straight, the flow distribution adjusting section (210) is set as a concave arc shape in the horizontal direction of the curve, the direction of the lubricating oil splash is consistent, the flow distribution point (215) is located at the top of the concave arc, the flow distribution block (4) has a part that is higher than the oil collecting groove (21), after the flow distribution block (4) slides to the left or to the right, the part that is higher than the oil collecting groove (21) can withstand the impact of the splash lubricating oil, when the centrifugal force is reduced or removed, the component of the impact force of the splash lubricating oil in the direction of the curve makes the flow distribution block (4) slide to the flow distribution point (215) and reset.

8. The method of claim 7, wherein the bearings at both ends of the input shaft of the speed reducer are ensured of oil supply. The part of the flow distribution block (4) that is higher than the oil collecting groove (21) is set as a rain sail (41) with a left oil receiving surface (411) and a right oil receiving surface (412), after the flow distribution block (4) slides to the right on the concave arc-shaped flow distribution adjusting section (210), the right oil receiving surface (412) gradually turns to the direction of the splash lubricating oil by arc sliding, and then the oil receiving amount of the right oil receiving surface (412) is greater than that of the left oil receiving surface (411), the impact force of the splash lubricating oil on the right oil receiving surface (412) makes the flow distribution block (4) obtain a greater component force to reset to the flow distribution point (215); after the flow distribution block (4) slides to the left on the concave arc-shaped flow distribution adjusting section (210), the left oil receiving surface (411) gradually turns to the direction of the splash lubricating oil by arc sliding, and then the oil receiving amount of the left oil receiving surface (411) is greater than that of the right oil receiving surface (412), the impact force of the splash lubricating oil on the left oil receiving surface (411) makes the flow distribution block (4) obtain a greater component force to reset to the flow distribution point (215).

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