An electric drive axle lubricating oil quantity control system

Abstract

The application provides an electric drive axle lubricating oil quantity control system, which comprises a shell, an oil storage cavity is formed in the shell, a transmission shaft is arranged above the oil storage cavity, an oil sending channel is formed in the transmission shaft, an oil collecting groove is formed in the inner wall of the shell, a first rotating body, a second rotating body and a third rotating body are sequentially arranged on the outer side of the transmission shaft in the axial direction, and an oil collecting groove is formed in one end of the third rotating body; a plurality of oil throwing pieces are uniformly distributed on the outer side of the transmission shaft in the circumferential direction, the part of the oil throwing piece between the first rotating body and the second rotating body is a radial oil sending section, and the part of the oil throwing piece between the second rotating body and the third rotating body is an axial oil sending section; when the transmission shaft rotates, the radial oil sending section can throw the lubricating oil into the oil collecting groove, and the axial oil sending section can throw the lubricating oil into the oil collecting groove; and the second rotating body is connected with an adjusting assembly. The application can adjust the oil level and the lubricating oil supply quantity according to the rotating speed of the transmission shaft, and can realize the lubricating effect and the transmission efficiency under different rotating speeds.

Description

Technical Field

[0001] This invention relates to the automotive field, specifically to an electric drive axle lubricating oil quantity control system. Background Technology

[0002] The electric drive axle is typically located at the end of the vehicle's drivetrain, responsible for changing the speed and torque of the power source and transmitting power to the drive wheels. Currently, integrated parallel shaft drive systems are widely used in electric drive axles. This system directly connects the drive motor to the drive axle, and due to the high motor speed, the electric drive axle incorporates a multi-stage reduction gear structure. Lubricating oil, an indispensable component of the reduction gear structure, is responsible for cooling, lubricating, and preventing rust on the gears and bearings. Splash lubrication, as one of the main lubrication methods, offers advantages such as simple and compact structure.

[0003] However, the effectiveness of splash lubrication is affected by the driveshaft rotation speed and oil level. When the driveshaft rotation speed is low, the splashing ability is weak. In this case, it is appropriate to raise the oil level of the electric drive axle to increase the immersion depth of the gears and increase the lubricating oil supply to the bearings, thereby ensuring that the gears and bearings of the reduction gear structure are adequately lubricated. When the driveshaft rotation speed is high, the splashing ability is strong. In this case, it is necessary to lower the oil level of the electric drive axle to reduce the immersion depth of the gears and decrease the lubricating oil supply to the bearings, thereby reducing the energy consumption of oil churning in the gears and bearings and improving transmission efficiency. However, traditional electric drive axles cannot adjust the oil level and lubricating oil supply according to the driveshaft rotation speed, making it difficult to balance lubrication effect and transmission efficiency at different speeds. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an electric drive axle lubricating oil quantity control system, which can adjust the oil level and lubricating oil supply according to the rotational speed of the drive shaft, so as to achieve both lubrication effect and transmission efficiency at different speeds.

[0005] The present invention adopts the following technical solution.

[0006] An electric drive axle lubricating oil quantity control system includes a housing, an oil storage cavity for storing lubricating oil is formed inside the housing, a horizontally extending drive shaft is provided above the oil storage cavity, an oil delivery channel is formed inside the drive shaft, an oil collection groove is formed on the inner wall of the housing in the radial direction of the drive shaft, and a first rotating body, a second rotating body and a third rotating body are sequentially sleeved on the outer side of the drive shaft along the axial direction, and an oil collection groove communicating with the oil delivery channel is formed at the end of the third rotating body near the second rotating body;

[0007] Multiple oil-slinging plates are evenly distributed circumferentially on the outer side of the drive shaft, passing through the second rotating body. The portion of the oil-slinging plate between the first and second rotating bodies is the radial oil delivery section, and the portion of the oil-slinging plate between the second and third rotating bodies is the axial oil delivery section.

[0008] When the drive shaft rotates, the radial oil delivery section can throw the lubricating oil into the oil collection groove, and the axial oil delivery section can throw the lubricating oil into the oil collection groove.

[0009] The second rotating body is connected to an adjustment component, which can drive the second rotating body to move along its axial direction according to the rotational speed of the transmission shaft, so as to change the length of the radial oil delivery section and the axial oil delivery section.

[0010] The length of the radial oil delivery section is directly proportional to the rotational speed of the drive shaft, and the length of the axial oil delivery section is inversely proportional to the rotational speed of the drive shaft.

[0011] Furthermore, the second rotating body has a clearance groove through which the oil-slinging plate passes and is slidably connected to the oil-slinging plate.

[0012] Furthermore, the oil slinger is a rigid structure, and the oil slinger extends spirally along the axial direction of the drive shaft.

[0013] Furthermore, the oil slinger is an elastic structure, and both the front and rear ends of the oil slinger are connected to the drive shaft as a whole. The radial oil delivery section is horizontally arranged, and the axial oil delivery section is inclined.

[0014] Furthermore, the elastic restoring force of the oil-slinging plate causes the second rotating body to tend to move away from the third rotating body and to tend to move closer to the first rotating body, and the second rotating body is slidably connected to the drive shaft.

[0015] Furthermore, the adjustment component includes a first permanent magnet and a second permanent magnet that are mutually exclusive;

[0016] The first permanent magnet is slidably connected to the first rotating body in the radial direction. An elastic element is connected between the first permanent magnet and the first rotating body. The elastic element causes the first permanent magnet to tend to move closer to the axis of the first rotating body. The distance from the first permanent magnet to the axis of the first rotating body is inversely proportional to the distance from the first permanent magnet to the second permanent magnet.

[0017] The second permanent magnet is connected to the second rotating body as a whole.

[0018] Furthermore, the adjustment assembly also includes a third permanent magnet that is mutually repelled by the second permanent magnet, and the third permanent magnet is connected to the third rotating body as a whole.

[0019] Furthermore, the oil collection tank is connected to an oil collection chamber, and an oil discharge channel is connected between the oil collection chamber and the oil storage chamber.

[0020] The beneficial effects of this invention are as follows:

[0021] The transmission shaft of this invention has multiple oil-throwing plates evenly distributed circumferentially along its outer side, passing through the second rotating body. The portion of the oil-throwing plates between the first and second rotating bodies is a radial oil-feeding section, and the portion between the second and third rotating bodies is an axial oil-feeding section. When the transmission shaft rotates, the radial oil-feeding section throws lubricating oil from the oil storage chamber into the oil collection groove, and the axial oil-feeding section throws lubricating oil from the oil storage chamber into the oil collection groove. The lubricating oil entering the oil collection groove is temporarily stored, thereby lowering the oil level in the oil storage chamber; while the lubricating oil entering the oil collection groove is supplied to the bearing to be lubricated through the oil delivery channel. Furthermore, the second rotating body is connected to an adjustment assembly, which can drive the second rotating body to move axially according to the rotational speed of the transmission shaft, thereby changing the lengths of the radial and axial oil-feeding sections.

[0022] Specifically, when the rotational speed of the drive shaft decreases, the adjusting component drives the second rotating body closer to the first rotating body. On the one hand, this reduces the length of the radial oil delivery section, thereby decreasing the oil intake of the oil collection groove and causing the oil level in the oil storage chamber to rise, thus increasing the oil immersion depth of the gears. On the other hand, it increases the length of the axial oil delivery section, thereby increasing the oil intake of the oil collection groove and thus increasing the lubricating oil supply to the bearings. In this way, both the gears and bearings receive sufficient lubrication.

[0023] Specifically, when the rotational speed of the drive shaft increases, the adjusting component drives the second rotating body closer to the third rotating body. On the one hand, this increases the length of the radial oil delivery section, thereby increasing the oil intake of the oil collection groove and lowering the oil level in the oil storage chamber, thus reducing the oil immersion depth of the gears. On the other hand, it decreases the length of the axial oil delivery section, thereby reducing the oil intake of the oil collection groove and thus reducing the amount of lubricating oil supplied to the bearings. In this way, the energy consumption of oil churning in the gears and bearings is reduced, improving transmission efficiency.

[0024] As can be seen, the present invention can adjust the oil level and lubricating oil supply according to the rotational speed of the drive shaft, so as to achieve both lubrication effect and transmission efficiency at different speeds. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0027] Figure 2 for Figure 1A schematic diagram of the AA-direction structure;

[0028] Figure 3 This is a schematic diagram of the structure of a second embodiment of the present invention;

[0029] Figure 4 for Figure 3 A schematic diagram of the BB-oriented structure.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Shell 1, 11. Oil collection tank 11, 12. Oil collection chamber 12, 13.

[0032] Drive shaft 2, oil supply passage 21,

[0033] First rotating body 3,

[0034] Second rotating body 4,

[0035] Third rotating body 5, oil collection tank 51

[0036] Oil slinger 6, radial oil delivery section 61, axial oil delivery section 62.

[0037] First permanent magnet 71, second permanent magnet 72, third permanent magnet 73, elastic element 74.

[0038] Positioning rib 8. Detailed Implementation

[0039] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0040] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] As attached Figures 1 to 4 The electric drive axle lubricating oil quantity control system shown includes a housing 1, an oil storage cavity for storing lubricating oil is formed inside the housing 1, a horizontally extending drive shaft 2 is provided above the oil storage cavity, an oil delivery channel 21 is formed inside the drive shaft 2, an oil collection groove 11 located radially on the inner wall of the housing 1 is provided, and a first rotating body 3, a second rotating body 4 and a third rotating body 5 are sequentially sleeved on the outer side of the drive shaft 2 along the axial direction, and an oil collection groove 51 communicating with the oil delivery channel 21 is provided at the end of the third rotating body 5 near the second rotating body 4;

[0042] Multiple oil-slinging plates 6 are evenly distributed circumferentially on the outer side of the drive shaft 2, passing through the second rotating body 4. The part of the oil-slinging plate 6 located between the first rotating body 3 and the second rotating body 4 is the radial oil delivery section 61, and the part of the oil-slinging plate 6 located between the second rotating body 4 and the third rotating body 5 is the axial oil delivery section 62.

[0043] When the drive shaft 2 rotates, the radial oil delivery section 61 can throw the lubricating oil into the oil collection groove 11, and the axial oil delivery section 62 can throw the lubricating oil into the oil collection groove 51.

[0044] The second rotating body 4 is connected to an adjustment component, which can drive the second rotating body 4 to move along its axial direction according to the rotation speed of the transmission shaft 2, so as to change the length of the radial oil delivery section 61 and the axial oil delivery section 62.

[0045] The length of the radial oil delivery section 61 is directly proportional to the rotational speed of the drive shaft 2, and the length of the axial oil delivery section 62 is inversely proportional to the rotational speed of the drive shaft 2.

[0046] Specifically, the lubricating oil entering the oil collection tank 11 will be temporarily stored, thereby reducing the oil level in the oil storage chamber; while the lubricating oil entering the oil collection tank 51 will be supplied to the bearing to be lubricated through the oil delivery channel 21.

[0047] Specifically, when the rotational speed of the drive shaft 2 decreases, the adjusting component drives the second rotating body 4 closer to the first rotating body 3. On the one hand, this reduces the length of the radial oil delivery section 61, thereby reducing the oil intake of the oil collection groove 11, causing the oil level in the oil storage chamber to rise, and thus increasing the oil immersion depth of the gears. On the other hand, it increases the length of the axial oil delivery section 62, thereby increasing the oil intake of the oil collection groove 51, and thus correspondingly increasing the lubricating oil supply to the bearings. This ensures that both the gears and bearings receive sufficient lubrication.

[0048] Specifically, when the rotational speed of the drive shaft 2 increases, the adjusting component drives the second rotating body 4 closer to the third rotating body 5. On the one hand, this increases the length of the radial oil delivery section 61, thereby increasing the oil intake of the oil collection groove 11, causing the oil level in the oil storage chamber to drop, and thus reducing the oil immersion depth of the gears. On the other hand, it decreases the length of the axial oil delivery section 62, thereby reducing the oil intake of the oil collection groove 51, and thus reducing the lubricating oil supply to the bearings. This reduces the energy consumption of oil churning in the gears and bearings, and improves transmission efficiency.

[0049] It is understandable that the third rotating body 5 could be a gear or a disc.

[0050] The second rotating body 4 has a clearance groove through which the oil-slinging plate 6 passes and is slidably connected to the oil-slinging plate 6.

[0051] As an example, see attached Figure 1 and 2As shown, the oil slinger 6 is a rigid structure, extending spirally along the axial direction of the drive shaft 2. During the rotation of the drive shaft 2, the oil slinger 6 drives the lubricating oil in the oil storage chamber to move from the first rotating body 3 to the third rotating body 5. The lubricating oil located between the first rotating body 3 and the second rotating body 4 collides with the second rotating body 4 during its movement towards the third rotating body 5, thus changing its axial motion to radial motion, and is finally thrown into the oil collection groove 11. The lubricating oil located between the second rotating body 4 and the third rotating body 5 is directly thrown into the oil collection groove 51.

[0052] The adjustment assembly includes a first permanent magnet 71 and a second permanent magnet 72 that are mutually exclusive, and a third permanent magnet 73 that is mutually exclusive with the second permanent magnet 72;

[0053] The first permanent magnet 71 is slidably connected to the first rotating body 3 in the radial direction. An elastic element 74 is connected between the first permanent magnet 71 and the first rotating body 3. The elastic element 74 makes the first permanent magnet 71 tend to move closer to the axis of the first rotating body 3. The distance from the first permanent magnet 71 to the axis of the first rotating body 3 is inversely proportional to the distance from the first permanent magnet 71 to the second permanent magnet 72.

[0054] The second permanent magnet 72 is connected to the second rotating body 4 as a whole, and the third permanent magnet 73 is connected to the third rotating body 5 as a whole. In this example, multiple first permanent magnets 71, second permanent magnets 72 and third permanent magnets 73 are evenly distributed along the circumference of the drive shaft 2.

[0055] The first rotating body 3 and the third rotating body 5 are both connected to the transmission shaft 2 as a whole.

[0056] Specifically, when the drive shaft 2 is stationary, both the first permanent magnet 71 and the third permanent magnet 73 generate magnetic repulsion forces on the second permanent magnet 72, thereby keeping the second rotating body 4 in a balanced position. When the rotational speed of the drive shaft 2 increases, the first permanent magnet 71 overcomes the elastic restoring force of the elastic element 74 and moves away from the axis of the first rotating body 3. As the distance between the first permanent magnet 71 and the axis of the first rotating body 3 increases, the distance between the first permanent magnet 71 and the second permanent magnet 72 decreases accordingly, thereby increasing the magnetic repulsion force of the first permanent magnet 71 on the second permanent magnet 72, and thus driving the second permanent magnet 72 to move closer to the third rotating body 5.

[0057] As another example, see attached Figure 3 and 4As shown, the oil slinger 6 is an elastic structure. Both its head and tail ends are connected to the drive shaft 2 as a whole. The radial oil delivery section 61 is horizontally positioned, while the axial oil delivery section 62 is inclined. It is understood that the horizontally positioned radial oil delivery section 61 can directly throw the lubricating oil between the first rotating body 3 and the second rotating body 4 into the oil collection groove 11, and the inclined axial oil delivery section 62 can directly throw the lubricating oil between the second rotating body 4 and the third rotating body 5 into the oil collection groove 51. In this example, the head and tail ends of the oil slinger 6 are connected to the drive shaft 2 as a whole via positioning ribs 8, and the side of the oil slinger 6 is movably connected to the drive shaft 2.

[0058] The elastic restoring force of the oil slinger 6 causes the second rotating body 4 to tend to move away from the third rotating body 5 and to tend to move closer to the first rotating body 3. The second rotating body 4 is slidably connected to the drive shaft 2.

[0059] The adjustment assembly includes a first permanent magnet 71 and a second permanent magnet 72 that are mutually exclusive;

[0060] The first permanent magnet 71 is slidably connected to the first rotating body 3 in the radial direction. An elastic element 74 is connected between the first permanent magnet 71 and the first rotating body 3. The elastic element 74 makes the first permanent magnet 71 tend to move closer to the axis of the first rotating body 3. The distance from the first permanent magnet 71 to the axis of the first rotating body 3 is inversely proportional to the distance from the first permanent magnet 71 to the second permanent magnet 72.

[0061] The second permanent magnet 72 is connected to the second rotating body 4 as a whole. In this example, both the first permanent magnet 71 and the second permanent magnet 72 are evenly distributed in multiples along the circumference of the transmission shaft 2.

[0062] Specifically, when the drive shaft 2 is stationary, the elastic restoring force of the oil slinger 6 causes the first rotating body 3 and the second rotating body 4 to move away from the third rotating body 5, while the magnetic repulsion between the first permanent magnet 71 and the second permanent magnet 72 causes the first rotating body 3 to move away from the second rotating body 4, thus keeping the first rotating body 3 and the second rotating body 4 in a balanced position. When the rotational speed of the drive shaft 2 increases, the first permanent magnet 71 overcomes the elastic restoring force of the elastic element 74 and moves away from the axis of the first rotating body 3. As the distance between the first permanent magnet 71 and the axis of the first rotating body 3 increases, the distance between the first permanent magnet 71 and the second permanent magnet 72 decreases accordingly, thereby increasing the magnetic repulsion of the first permanent magnet 71 on the second permanent magnet 72, which in turn drives the first rotating body 3 and the second rotating body 4 to move closer to the third rotating body 5. Since the displacement of the first rotating body 3 is less than the displacement of the second rotating body 4, the length of the radial oil delivery section 61 increases, while the length of the axial oil delivery section 62 decreases.

[0063] Furthermore, as the distance between the second rotating body 4 and the third rotating body 5 decreases, the tilt angle of the axial oil delivery section 62 also increases, which also helps to reduce the amount of oil delivered by the axial oil delivery section 62 to the oil collection tank 51.

[0064] Preferably, the oil collection trough 11 is connected to the oil collection chamber 12, and the oil collection chamber 12 is connected to the oil storage chamber by an oil drain channel 13. It is understood that the lubricating oil thrown into the oil collection trough 11 will flow into the oil collection chamber 12 and then return to the oil storage chamber through the oil drain channel 13. As the rotational speed of the drive shaft 2 increases, when the oil inflow into the oil collection trough 11 exceeds the oil outflow into the oil drain channel 13, the oil collection chamber 12 can buffer the lubricating oil, thereby lowering the oil level in the oil storage chamber.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electric drive axle lubricating oil quantity control system, comprising a housing, wherein an oil reservoir for storing lubricating oil is formed within the housing, a horizontally extending drive shaft is disposed above the oil reservoir, and an oil delivery channel is formed within the drive shaft, characterized in that, The inner wall of the housing is provided with an oil collection groove located radially on the drive shaft. The outer side of the drive shaft is provided with a first rotating body, a second rotating body and a third rotating body in sequence along the axial direction. The end of the third rotating body near the second rotating body is provided with an oil collection groove that communicates with the oil delivery channel. Multiple oil-slinging plates are evenly distributed circumferentially on the outer side of the drive shaft, passing through the second rotating body. The portion of the oil-slinging plates located between the first and second rotating bodies is the radial oil delivery section, and the portion of the oil-slinging plates located between the second and third rotating bodies is the axial oil delivery section. When the drive shaft rotates, the radial oil delivery section can throw the lubricating oil into the oil collection groove, and the axial oil delivery section can throw the lubricating oil into the oil collection groove. The second rotating body is connected to an adjustment component, which can drive the second rotating body to move along its axial direction according to the rotational speed of the transmission shaft, so as to change the length of the radial oil delivery section and the axial oil delivery section. The length of the radial oil delivery section is directly proportional to the rotational speed of the drive shaft, and the length of the axial oil delivery section is inversely proportional to the rotational speed of the drive shaft. The second rotating body has a clearance groove through which the oil-slinging plate passes and is slidably connected to the oil-slinging plate; The oil collection tank is connected to an oil collection chamber, and an oil discharge channel is connected between the oil collection chamber and the oil storage chamber.

2. The electric drive axle lubricating oil quantity control system according to claim 1, characterized in that, The oil slinger is a rigid structure and extends spirally along the axial direction of the drive shaft.

3. The electric drive axle lubricating oil quantity control system according to claim 1, characterized in that, The oil slinger is an elastic structure, and its head and tail ends are connected to the drive shaft as a whole. The radial oil delivery section is horizontally arranged, and the axial oil delivery section is inclined.

4. The electric drive axle lubricating oil quantity control system according to claim 3, characterized in that, The elastic restoring force of the oil slinger causes the second rotating body to tend to move away from the third rotating body and to tend to move closer to the first rotating body. The second rotating body is slidably connected to the drive shaft.

5. The electric drive axle lubricating oil quantity control system according to claim 1, characterized in that, The adjustment assembly includes a first permanent magnet and a second permanent magnet that are mutually exclusive; The first permanent magnet is slidably connected to the first rotating body in the radial direction. An elastic element is connected between the first permanent magnet and the first rotating body. The elastic element causes the first permanent magnet to tend to move closer to the axis of the first rotating body. The distance from the first permanent magnet to the axis of the first rotating body is inversely proportional to the distance from the first permanent magnet to the second permanent magnet. The second permanent magnet is connected to the second rotating body as a whole.

6. The electric drive axle lubricating oil quantity control system according to claim 5, characterized in that, The adjustment assembly also includes a third permanent magnet that is mutually repelled by the second permanent magnet, and the third permanent magnet is connected to the third rotating body as a whole.

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