Coaxial electric drive oil collection lubricating structure and method

Abstract

The structure comprises a first oil collecting box and a second oil collecting box which are arranged on the two sides of a double planet row, a first notch is formed in the surface of the first oil collecting box, and a second notch is formed in the surface of the second oil collecting box; a first oil guide hole is formed in the bottom surface of the first oil collecting box, one end of the first oil guide hole communicates with the interior of the first oil collecting box, and the other end extends into the needle bearing on one side; a second oil guide hole is formed in the bottom surface of the second oil collecting box, one end of the second oil guide hole is communicated with the interior of the second oil collecting box, and the other end extends into the needle bearing on the other side; the second oil collecting box and the planetary gear differential are located on the same side of the double-planet row, and an oil stirring mechanism is arranged on the outer surface of the second oil collecting box; oil enters the oil collecting box from the first notch or the second notch, and the oil in the oil collecting box enters the planetary gear shaft and then enters the needle bearing through a hole in the planetary gear shaft; and the oil stirring mechanism on the second oil collecting box throws oil in the oil pan into the differential mechanism to provide lubrication for the differential mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive assembly lubrication, and in particular to a coaxial electric drive oil collecting lubrication structure and a lubrication method. Background Art

[0002] At present, new energy vehicles use coaxial electric drives to integrate motors, reducers and differentials to reduce transmission components and improve space utilization. Coaxial electric drives are suitable for front-wheel drive or rear-wheel drive electric vehicles.

[0003] Coaxial electric drives currently use a double planetary gear structure, which is always in a rotating state. Figure 1 As shown, the planetary gear a on the double planetary gear is connected to the planetary gear shaft b through a needle bearing c. The planetary gear a is located on the periphery of the needle bearing c, and the needle bearing c is sleeved on the periphery of the planetary gear shaft b. The needle bearing c is installed between the inner hole of the planetary gear a and the planetary gear shaft b, so that the planetary gear a can rotate freely around the axis. The needle bearing needs to be lubricated, but during the rotation of the planetary gear, the needle bearing rotates with the planetary gear, and the needle bearing is not immersed in the gear oil most of the time. It is necessary to provide lubrication for the needle bearing by setting an oil guide structure.

[0004] When the vehicle is driving in a straight line, the wheels on both sides rotate at the same speed, but when the vehicle turns, the wheels on both sides need to rotate at different speeds, and a planetary gear differential is needed to balance the speed difference between the wheels on both sides. The planetary gear differential uses a planetary gear mechanism to achieve the differential function. The coaxial electric drive planetary gear has very little oil dumping, and the planetary gear differential lacks lubrication, so an oil guide structure needs to be set up to provide lubrication for the differential. Summary of the invention

[0005] The purpose of the present invention is to provide an oil collecting lubrication structure and a lubrication method for a needle bearing and a planetary gear differential included in a coaxial electric drive, so as to solve the problem of insufficient lubrication of the needle bearings and the planetary gear differential of the planetary gear when the coaxial electric drive adopts a double planetary gear structure.

[0006] To achieve the above objectives, the technical solution of the present invention is:

[0007] A coaxial electric drive oil collecting and lubricating structure includes a double planetary gear set. The double planetary gear set includes planetary gear sets located on opposite sides. Each side's planetary gear set includes multiple planetary gears. First and second oil collecting boxes are respectively arranged on both sides of the double planetary gear set, and the first and second oil collecting boxes rotate with the planetary gear set. At least one first notch is formed on the surface of the first oil collecting box, and at least one second notch is formed on the surface of the second oil collecting box. At least one first oil guiding hole is provided on the bottom surface of the first oil collecting box. One end of the first oil guiding hole communicates with the inside of the first oil collecting box, and the other end extends into the inner side of the needle roller bearing on one side of the double planetary gear set. At least one second oil guiding hole is provided on the bottom surface of the second oil collecting box. One end of the second oil guiding hole communicates with the inside of the second oil collecting box, and the other end extends into the inner side of the needle roller bearing on the other side of the double planetary gear set. The second oil collecting box and the planetary gear differential are located on the same side of the double planetary gear set, and at least one set of protruding baffles is provided on the outer surface of the second oil collecting box.

[0008] Further, the first oil collecting box is integrally annular. The first oil collecting box includes an upper cover plate, a lower bottom plate and side plates. The side plates include an outer side plate and an inner side plate. The outer side plate connects the upper cover plate and the lower bottom plate, and the outside of the first oil collecting box is closed by the outer side plate. Opposite to the outer side plate is the inner side plate of the first oil collecting box, and the inner side surface of the first oil collecting box is closed by the inner side plate.

[0009] Further, a plurality of bolt mounting holes are evenly spaced along the circumferential direction on the lower bottom plate. Bolts pass through the bolt mounting holes on the first oil collecting box to mount the first oil collecting box on the outside of one set of planetary gear sets of the double planetary gear set. A first notch is provided on the upper cover plate corresponding to the bolt mounting holes, and the oil body enters the first oil collecting box through the first notch.

[0010] Further, a plurality of bumps are evenly spaced along the circumferential direction on the lower bottom plate. Each bump is provided with a first oil guiding hole. Both ends of the first oil guiding hole are open and the inside is hollow. The number of first oil guiding holes provided on the lower bottom plate is equal to the number of planetary gears included in the planetary gear set on one side.

[0011] Further, a protruding plate is provided on the upper cover plate corresponding to the first oil guiding hole. The protruding plate is located directly above the first oil guiding hole, and a protruding end is provided at a position on the outer side plate corresponding to the first oil guiding hole.

[0012] Further, during the rotation of the first oil collecting box, the oil hole of the vehicle's active lubrication mechanism is located above the first notch.

[0013] Furthermore, the second oil collecting box is integrally annular. The second oil collecting box includes an upper panel, a lower panel, and an edge panel. The edge panel includes an outer edge panel and an inner edge panel. The outer edge panel connects the upper panel and the lower panel, and the outer side of the second oil collecting box is closed through the outer edge panel. Opposite to the outer edge panel is the inner edge panel of the second oil collecting box, and the inner side of the second oil collecting box is closed through the inner edge panel.

[0014] Furthermore, a plurality of bolt mounting holes are circumferentially and evenly spaced on the lower panel. Bolts pass through the bolt mounting holes on the second oil collecting box to mount the second oil collecting box on the outside of another set of planetary gear sets of the double planetary row. A second notch is provided on the upper panel corresponding to the bolt mounting holes, and the oil body enters the second oil collecting box through the second notch.

[0015] Furthermore, a plurality of second oil guiding holes are evenly spaced on the lower panel. The second oil guiding holes and the bolt mounting holes on the lower panel are spaced on the lower panel. Both ends of the second oil guiding holes are open and the inside is hollow. The number of the second oil guiding holes provided on the lower panel is equal to the number of planetary gears included in the planetary gear set on the other side. A protruding portion is provided on the outer edge panel corresponding to the second oil guiding holes.

[0016] A method for realizing lubrication by using the coaxial electric drive oil collecting lubrication structure, the method includes:

[0017] Install a first oil collecting box on the planetary gear set on one side of the double planetary row, and install a second oil collecting box on the planetary gear set on the other side of the double planetary row;

[0018] During the rotation of the first oil collecting box, when a first notch at the lowest position is immersed in the oil in the oil pan, the oil in the oil pan enters the first oil collecting box through the first notch;

[0019] During the rotation of the first oil collecting box, when the first notch is aligned with the oil hole of the oil passage active lubrication mechanism, the oil in the oil passage active lubrication mechanism enters the first oil collecting box;

[0020] During the rotation of the second oil collecting box, when a second notch at the lowest position is immersed in the oil in the oil pan, the oil in the oil pan enters the first oil collecting box through the second notch;

[0021] The oil in the first oil collecting box enters the first oil guiding hole, and the oil enters one side planetary gear shaft along the first oil guiding hole, and then enters the needle bearing through the hole on the planetary gear shaft to lubricate the needle bearing on one side;

[0022] The oil in the second oil collecting box enters the second oil guiding hole, and the oil enters the planetary gear shaft on the other side along the second oil guiding hole, and then enters the needle bearing through the hole on the planetary gear shaft to lubricate the needle bearing on the other side;

[0023] During the rotation of the second oil collecting box, when the protruding baffle is immersed in the oil in the oil pan, under the action of rotation, the protruding baffle stirs up the oil in the oil pan and throws the oil in the oil pan into the planetary gear differential to provide lubrication for the planetary gear differential.

[0024] The beneficial effects of the present invention are as follows:

[0025] The oil collecting and lubricating structure and lubricating method of the present application can solve the lubrication problem of the coaxial electric drive planetary row and differential.

[0026] 1. In the prior art, the needle roller bearing needs lubrication. However, during the rotation of the planetary row, the needle roller bearing rotates with the planetary row, and the needle roller bearing is not immersed in the gear oil for most of the time. In the present invention, an oil collecting box is arranged outside the planetary row, and there is always oil in the oil collecting box. The oil in the oil collecting box enters the needle roller bearing, and the lubrication requirement of the needle roller bearing is met by setting the oil collecting box.

[0027] 2. In the present invention, the baffle of the oil collecting box can ensure that the oil collecting box blocks the oil into the oil guiding hole during rotation, and the oil in the guiding hole enters the needle roller bearing, so as to ensure that the needle roller bearing can still be lubricated by the oil in the oil collecting box when the needle roller bearing does not contact the oil in the oil pan at the highest point.

[0028] 3. In the present invention, the planetary gear differential is located outside the second oil collecting box, and multiple groups of baffles are arranged on the surface of the second oil collecting box. When the second oil collecting box rotates with the planetary row and the baffles are immersed in the oil in the oil pan, under the action of rotation, the protruding baffles stir up the oil in the oil pan, so as to throw the oil in the oil pan into the planetary gear differential to provide lubrication for the planetary gear differential.

[0029] 4. In the present invention, the oil collecting box can be ensured to have sufficient oil volume by the way that the oil in the oil pan enters and the oil passage active lubrication mechanism sprays.

[0030] 5. In the present invention, the oil collecting box can be fixed on the double planetary row by screws, which is convenient for installation. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the planetary row.

[0032] Figure 2 It is a schematic diagram of the oil collecting boxes installed on both sides of the double planetary row of the present invention.

[0033] Figure 3 It is a schematic diagram of the oil collecting boxes installed on both sides of the double planetary row of the present invention.

[0034] Figure 4 It is a cross-sectional view of the oil collecting boxes installed on both sides of the double planetary row of the present invention.

[0035] Figure 5 This is a cross-sectional view of the oil collecting boxes installed on both sides of the double planetary gear set of the present invention.

[0036] Figure 6 This is a schematic diagram of the first oil collecting box of the present invention.

[0037] Figure 7 This is a schematic diagram of the first oil collecting box of the present invention.

[0038] Figure 8 This is a cross-sectional view of the first oil collecting box of the present invention.

[0039] Figure 9 This is a schematic diagram of the second oil collecting box of the present invention.

[0040] Figure 10 This is a schematic diagram of the second oil collecting box of the present invention.

[0041] Figure 11 This is a cross-sectional view of the second oil collecting box of the present invention.

[0042] Planetary gear a; planetary gear shaft b; needle roller bearing c; first oil collecting box 1; upper cover plate 1.1; first notch 1.11; protruding plate 1.12; lower bottom plate 1.2; convex block 1.21; first oil guiding hole 1.22; outer side plate 1.3; protruding end 1.31; second oil collecting box 2; upper panel 2.1; second notch 2.11; lower panel 2.2; second oil guiding hole 2.21; outer edge panel 2.3; protruding part 2.31; double planetary gear set 3; bolt mounting hole 4; bolt 5; planetary gear differential 6; oil hole 7; baffle 8. Detailed implementation manners

[0043] In order to make the objectives, technical solutions and advantages of the invention clearer, the present invention will be further described below with reference to the accompanying drawings.

[0044] The oil pan on a vehicle is a part of the engine and is located at the bottom of the engine. The oil pan can enclose the crankcase and serve as the outer shell of the oil storage tank, collecting and storing the lubricating oil flowing back from various friction surfaces of the engine. The oil pan usually has an oil drain plug for regularly replacing or discharging the engine oil. The oil collecting box is mainly used for collecting the leaked engine oil, and the oil pan is a key component for storing and managing the engine oil in the engine.

[0045] The present invention realizes the collection and conduction of oil to lubricate the needle roller bearings of the planetary gear set through the characteristic design of the oil collecting box, and throws the oil into the planetary gear differential through the oil stirring characteristic on the oil collecting box to lubricate the differential.

[0046] In the present invention, the first oil collecting box 1 and the second oil collecting box 2 are arranged on both sides of the double planetary gear set 3. As Figures 2 to 4 , Figure 6 and Figure 9As shown, bolt mounting holes 4 are provided on both the first oil collecting box 1 and the second oil collecting box 2. The bolt 5 passes through the bolt mounting hole 4 on the first oil collecting box 1 to mount the first oil collecting box 1 on the outside of one set of planetary gear sets of the double planetary row 3. The bolt 5 passes through the bolt mounting hole 4 on the second oil collecting box 2 to mount the second oil collecting box 2 on the outside of the other set of planetary gear sets of the double planetary row 3.

[0047] The first oil collecting box 1 and the second oil collecting box 2 rotate together with the planetary row.

[0048] The planetary gear differential 6 is located outside the second oil collecting box 2. The first oil collecting box 1 is located on one side of the double planetary row 3, and the planetary gear differential 6 and the second oil collecting box 2 are located on the other side of the double planetary row 3.

[0049] As Figure 6 、 Figure 7 and Figure 8 shown, the first oil collecting box 1 is integrally annular. The first oil collecting box 1 includes an upper cover plate 1.1, a lower bottom plate 1.2 and side plates. The side plates include an outer side plate 1.3 and an inner side plate. The outer side plate 1.3 is located on the outer side surface of the first oil collecting box 1. The outer side plate 1.3 is used to connect the upper cover plate 1.1 and the lower bottom plate 1.2 to enclose the outside of the first oil collecting box 1 through the outer side plate 1.3. Opposite to the outer side plate 1.3 is the inner side plate of the first oil collecting box 1, and the inner side surface of the first oil collecting box 1 is enclosed through the inner side plate.

[0050] A plurality of bolt mounting holes 4 are circumferentially and evenly spaced on the lower bottom plate 1.2. In a specific embodiment, three bolt mounting holes 4 are circumferentially and evenly spaced on the lower bottom plate 1.2. A first notch 1.11 is provided on the upper cover plate 1.1 corresponding to the bolt mounting hole 4. When the bolt 5 is installed in the bolt mounting hole 4, the first notch 1.11 provides an installation space for avoiding the installation of the bolt 5.

[0051] A plurality of convex blocks 1.21 are circumferentially and evenly spaced on the lower bottom plate 1.2. The convex blocks 1.21 are arranged towards the center of the first oil collecting box 1. The convex blocks 1.21 and the bolt mounting holes 4 on the lower bottom plate 1.2 are spaced on the lower bottom plate 1.2. A first oil guiding hole 1.22 is provided on each convex block 1.21. Both ends of the first oil guiding hole 1.22 are open and the inside is hollow. The number of the first oil guiding holes 1.22 provided on the lower bottom plate 1.2 is equal to the number of planetary gears included in the planetary gear set on one side. In a specific embodiment, each side of the planetary gear set includes three planetary gears, so three first oil guiding holes 1.22 are circumferentially and evenly spaced on the lower bottom plate 1.2.

[0052] The double planetary row 3 includes a left planetary gear set and a right planetary gear set, and each side of the planetary gear set includes a plurality of planetary gears. Figure 5In this, c1 is the needle bearing of the left planetary gear, b1 is the planetary gear shaft of the left planetary gear, c2 is the needle bearing of the right planetary gear, and b2 is the planetary gear shaft of the right planetary gear.

[0053] On the outer side of the needle bearing c is the planetary gear a, and on the inner side is the planetary gear shaft b. When the first oil collecting box 1 is installed at the edge of the planetary gear set on the left side of the double planetary row 3, the end of the first oil guiding hole 1.22 extends into the inner side of the needle bearing, a part of the first oil guiding hole 1.22 is located in the inner hole of the needle bearing c, and the end of the first oil guiding hole 1.22 is close to the planetary gear shaft b. A protruding plate 1.12 is provided on the upper cover plate 1.1 corresponding to the first oil guiding hole 1.22, the protruding plate 1.12 is located directly above the first oil guiding hole 1.22, and a protruding end 1.31 is provided at the position on the outer side plate 1.3 corresponding to the first oil guiding hole 1.22. When oil enters the first oil collecting box 1, through the protruding plate 1.12 and the protruding end 1.31, the oil can be smoothly blocked into the first oil guiding hole 1.22. Since both the end of the first oil guiding hole 1.22 and the planetary gear shaft b1 of the left planetary gear are located in the inner hole of the needle bearing c1, the oil enters the planetary gear shaft b1 of the left planetary gear along the first oil guiding hole 1.22, and then enters the needle bearing c1 of the left planetary gear through the hole on the planetary gear shaft b1 of the left planetary gear, realizing the lubrication of the needle bearing c1 of the left planetary gear.

[0054] As Figure 9 、 Figure 10 and Figure 11 shown, the second oil collecting box 2 is integrally annular. The second oil collecting box 2 includes an upper panel 2.1, a lower panel 2.2 and an edge panel. The edge panel includes an outer edge panel 2.3 and an inner edge panel. The outer edge panel 2.3 is located on the outer side of the second oil collecting box 2. The outer edge panel 2.3 is used to connect the upper panel 2.1 and the lower panel 2.2, and the outer side of the second oil collecting box 2 is closed through the outer edge panel 2.3. Opposite to the outer edge panel 2.3 is the inner edge panel of the second oil collecting box 2, and the inner side of the second oil collecting box 2 is closed through the inner edge panel.

[0055] A plurality of bolt mounting holes 4 are circumferentially and evenly spaced on the lower panel 2.2. In a specific embodiment, three bolt mounting holes 4 are circumferentially and evenly spaced on the lower panel 2.2. A second notch 2.11 is provided on the upper panel 2.1 corresponding to the bolt mounting hole 4, and the second notch 2.11 can provide an installation space for avoiding when installing the bolt 5 in the bolt mounting hole 4.

[0056] A plurality of second oil guiding holes 2.21 are evenly spaced on the lower panel 2.2, and the second oil guiding holes 2.21 and the bolt mounting holes 4 on the lower panel 2.2 are spaced on the lower panel 2.2. Both ends of the second oil guiding hole 2.21 are open and the interior is hollow. The number of the second oil guiding holes 2.21 provided on the lower panel 2.2 is equal to the number of the planetary gears included in the planetary row on the other side. In a specific embodiment, each planetary row on both sides of the double planetary row 3 includes three planetary gears, so three second oil guiding holes 2.21 are evenly spaced along the circumference on the lower panel 2.2.

[0057] The outer side of the needle roller bearing c is the planetary gear a, and the inner side is the planetary gear shaft b. When the second oil collecting box 2 is installed at the edge of the planetary gear set on the right side of the double planetary row 3, the end of the second oil guiding hole 2.21 extends into the inner side of the needle roller bearing, a part of the second oil guiding hole 2.21 is located in the inner hole of the needle roller bearing c, and the end of the second oil guiding hole 2.21 is close to the planetary gear shaft b. The part of the upper panel 2.1 directly above the second oil guiding hole 2.21 can block the second oil guiding hole 2.21, and a protruding part 2.31 is provided at the part of the outer panel 2.3 on the edge corresponding to the second oil guiding hole 2.21. When oil enters the second oil collecting box 2, through the upper panel 2.1 and the protruding part 2.31, the oil can be smoothly blocked into the second oil guiding hole 2.21. Since both the end of the second oil guiding hole 2.2 and the planetary gear shaft b2 of the planetary gear on the right side are located in the inner hole of the needle roller bearing c2, the oil enters the planetary gear shaft b2 of the planetary gear on the right side along the second oil guiding hole 2.21, and then enters the needle roller bearing c2 of the planetary gear on the right side through the holes on the planetary gear shaft b2 of the planetary gear on the right side, realizing the lubrication of the needle roller bearing c2 of the planetary gear on the right side.

[0058] In the present invention, the oil in the first oil collecting box 1 comes from the oil entering from the vehicle oil pan and the active spraying of the oil passage. The oil in the second oil collecting box 2 comes from the oil entering from the vehicle oil pan.

[0059] There is a certain amount of oil in the oil pan, and part of the double planetary gear set itself is immersed in the oil in the oil pan. During the rotation of the double planetary gear set 3, when a first notch 1.11 or a second notch 2.11 is in the lowest position during rotation, one first notch 1.11 and one second notch 2.11 in the lowest position should be immersed in the oil in the oil pan, that is, the positions of one first notch 1.11 and one second notch 2.11 in the lowest position should be lower than the oil level height in the oil pan to ensure that the oil in the oil pan can smoothly enter the oil collecting box. When one first notch 1.11 and one second notch 2.11 in the lowest position are immersed in the oil in the oil pan, the oil in the oil pan enters the first oil collecting box 1 from the first notch 1.11, and the oil in the oil pan enters the second oil collecting box 2 from the second notch 2.11. When the first notch 1.11 or the second notch 2.11 rotates to the highest position, part of the oil in the oil collecting box enters the needle bearing, and part of it splashes outside the oil collecting box and enters the oil pan.

[0060] The vehicle itself includes an oil passage active lubrication mechanism. The oil in the first oil collecting box 1 comes from both the oil entering from the vehicle oil pan and the spraying of the oil passage active lubrication mechanism. Figure 5 The red arrow in the figure indicates the flow direction of the gear oil in the oil passage active lubrication mechanism. The oil hole 7 of the oil passage active lubrication mechanism is located above the first oil collecting box 1. During the rotation of the first oil collecting box 1 with the planetary gear set, when the first notch 1.11 aligns with the oil hole 7 of the oil passage active lubrication mechanism, the oil in the oil passage active lubrication mechanism can enter the first oil collecting box 1, increasing the oil volume in the first oil collecting box 1.

[0061] During the rotation of the first oil collecting box 1, the protruding plate 1.12 and the protruding end 1.31 can prevent the oil in the first oil collecting box 1 from centrifugal force during rotation. Through the protruding plate 1.12 and the protruding end 1.31, the oil in the first oil collecting box 1 can be smoothly blocked into the first oil guiding hole 1.22. Since the end of the first oil guiding hole 1.22 and the planetary gear shaft b1 of the left planetary gear are both located in the inner hole of the needle bearing c1, the oil enters the planetary gear shaft b1 of the left planetary gear along the first oil guiding hole 1.22, and then enters the needle bearing c1 of the left planetary gear through the hole on the planetary gear shaft b1 of the left planetary gear, realizing the lubrication of the needle bearing c1 of the left planetary gear.

[0062] During the rotation of the second oil collecting box 2, the upper panel 2.1 and the protruding part 2.31 can prevent the oil in the second oil collecting box 2 from centrifugal force during rotation. Through the upper panel 2.1 and the protruding part 2.31, the oil can be smoothly blocked into the second oil guiding hole 2.21. Since the end of the second oil guiding hole 2.2 and the planet gear shaft b2 of the right planetary gear are both located in the inner hole of the needle bearing c2, the oil enters the planet gear shaft b2 of the right planetary gear along the second oil guiding hole 2.21, and then enters the needle bearing c2 of the right planetary gear through the hole on the planet gear shaft b2 of the right planetary gear, realizing the lubrication of the needle bearing c2 of the right planetary gear.

[0063] In practical applications, the through holes in the middle of the first oil collecting box 1 and the second oil collecting box 2 can be closed by a planetary gear housing.

[0064] The second oil collecting box 2 is provided with an oil stirring structure, and the oil stirring structure includes a plurality of groups of protruding baffles 8 arranged on the surface of the second oil collecting box 2. As Figure 10 and Figure 11 shown, three groups of protruding baffles 8 are evenly spaced on the surface of the upper panel 2.1 of the second oil collecting box 2. Each group of protruding baffles 8 includes three baffle pieces, and the three baffle pieces are evenly spaced. Each baffle piece has a preset arc. Part of the planetary gear set and the second oil collecting box 2 itself are immersed in the oil in the oil pan. During the rotation of the second oil collecting box 2, when the protruding baffle 8 is immersed in the oil in the oil pan, under the action of the rotation force, the protruding baffle 8 stirs up the oil in the oil pan, so as to throw the oil in the oil pan into the planetary gear differential 6 to provide lubrication for the planetary gear differential 6.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Claims

1. A coaxial electric drive oil collecting lubrication structure, comprising a double planetary gear set (3), the double planetary gear set (3) including planetary gear sets located on opposite sides, each planetary gear set on each side including a plurality of planetary gears, characterized in that: A first oil collecting box (1) and a second oil collecting box (2) are respectively arranged on both sides of the double planetary gear set (3), and the first oil collecting box (1) and the second oil collecting box (2) rotate along with the planetary gear set; at least one first notch (1.11) is formed on the surface of the first oil collecting box (1), and at least one second notch (2.11) is formed on the surface of the second oil collecting box (2); at least one first oil guiding hole (1.22) is arranged on the bottom surface of the first oil collecting box (1), one end of the first oil guiding hole (1.22) is communicated with the inside of the first oil collecting box (1), and the other end extends into the inner side of the needle bearing on one side of the double planetary gear set; at least one second oil guiding hole (2.21) is arranged on the bottom surface of the second oil collecting box (2), one end of the second oil guiding hole (2.21) is communicated with the inside of the second oil collecting box (2), and the other end extends into the inner side of the needle bearing on the other side of the double planetary gear set; the second oil collecting box (2) and the planetary gear differential (6) are located on the same side of the double planetary gear set (3), and at least one group of protruding baffles (8) are arranged on the outer surface of the second oil collecting box (2).

2. The coaxial electric drive oil collecting lubrication structure according to claim 1, characterized in that: The first oil collecting box (1) is integrally annular, and the first oil collecting box (1) includes an upper cover plate (1.1), a lower bottom plate (1.2) and side plates. The side plates include an outer side plate (1.3) and an inner side plate. The outer side plate (1.3) connects the upper cover plate (1.1) and the lower bottom plate (1.2), and the outside of the first oil collecting box (1) is closed through the outer side plate (1.3). Opposite to the outer side plate (1.3) is the inner side plate of the first oil collecting box (1), and the inner side surface of the first oil collecting box (1) is closed through the inner side plate.

3. The coaxial electric drive oil collecting lubrication structure according to claim 2, characterized in that: A plurality of bolt mounting holes (4) are uniformly arranged at intervals along the circumferential direction on the lower bottom plate (1.2). Bolts (5) pass through the bolt mounting holes (4) on the first oil collecting box (1) to mount the first oil collecting box (1) on the outside of one set of planetary gears of the double planetary gear set (3). A first notch (1.11) is arranged at the position corresponding to the bolt mounting hole (4) on the upper cover plate (1.1), and the oil body enters the first oil collecting box (1) through the first notch (1.11).

4. The coaxial electric drive oil collecting and lubricating structure according to claim 2, characterized in that: A plurality of bumps (1.21) are uniformly arranged at intervals along the circumferential direction on the lower bottom plate (1.2). A first oil guiding hole (1.22) is arranged on each bump (1.21). Both ends of the first oil guiding hole (1.22) are open and the inside is hollow. The number of the first oil guiding holes (1.22) arranged on the lower bottom plate (1.2) is equal to the number of the planetary gears included in the planetary gear set on one side.

5. The coaxial electric drive oil collecting lubrication structure according to claim 2, characterized in that: A protruding plate (1.12) is arranged at the position corresponding to the first oil guiding hole (1.22) on the upper cover plate (1.1). The protruding plate (1.12) is located directly above the first oil guiding hole (1.22), and a protruding end (1.31) is arranged at the position corresponding to the first oil guiding hole (1.22) on the outer side plate (1.3).

6. The coaxial electric drive oil-gathering lubrication structure according to claim 1, characterized in that: During the rotation of the first oil collecting box (1), the oil hole (7) of the vehicle lane active lubrication mechanism is located above the first notch (1.11).

7. The coaxial electric drive oil collecting lubrication structure according to claim 1, characterized in that: The second oil collecting box (2) is integrally annular. The second oil collecting box (2) includes an upper panel (2.1), a lower panel (2.2) and an edge panel. The edge panel includes an outer edge panel (2.3) and an inner edge panel. The outer edge panel (2.3) connects the upper panel (2.1) and the lower panel (2.2). The outer side of the second oil collecting box (2) is enclosed by the outer edge panel (2.3). Opposite to the outer edge panel (2.3) is the inner edge panel of the second oil collecting box (2), and the inner side of the second oil collecting box (2) is enclosed by the inner edge panel.

8. The coaxial electric drive oil collecting lubrication structure according to claim 7, characterized in that: A plurality of bolt mounting holes (4) are circumferentially and evenly spaced on the lower panel (2.2). Bolts (5) pass through the bolt mounting holes (4) on the second oil collecting box (2) to mount the second oil collecting box (2) on the outer side of another set of planetary gear sets of the double planetary row (3). A second notch (2.11) is provided on the upper panel (2.1) corresponding to the bolt mounting holes (4), and the oil body enters the second oil collecting box (2) through the second notch (2.11).

9. The coaxial electric drive oil collecting lubrication structure according to claim 7, characterized in that: A plurality of second oil guiding holes (2.21) are evenly spaced on the lower panel (2.2). The second oil guiding holes (2.21) and the bolt mounting holes (4) on the lower panel (2.2) are spaced on the lower panel (2.2). Both ends of the second oil guiding holes (2.21) are open and the interior is hollow. The number of the second oil guiding holes (2.21) provided on the lower panel (2.2) is equal to the number of planetary gears included in the planetary gear set on the other side. A protruding portion (2.31) is provided on the outer edge panel (2.3) corresponding to the second oil guiding holes (2.21).

10. A method for realizing lubrication by using any one of the coaxial electric drive oil collecting lubrication structures of claims 1-9, the method comprising: Installing a first oil collecting box (1) on a planetary gear set on one side of the double planetary row (3), and installing a second oil collecting box (2) on a planetary gear set on the other side of the double planetary row (3); During the rotation of the first oil collecting box (1), when a first notch (1.11) in the lowest position is immersed in the oil in the oil sump, the oil in the oil sump enters the first oil collecting box (1) through the first notch (1.11); During the rotation of the first oil collecting box (1), when the first notch (1.11) is aligned with the oil hole (7) of the oil passage active lubrication mechanism, the oil in the oil passage active lubrication mechanism enters the first oil collecting box (1); During the rotation of the second oil collecting box (2), when a second notch (2.11) in the lowest position is immersed in the oil in the oil sump, the oil in the oil sump enters the first oil collecting box (1) through the second notch (2.11); The oil in the first oil collecting box (1) enters the first oil guiding hole (1.22), and the oil enters one side planetary gear shaft along the first oil guiding hole (1.22), and then enters the needle bearing through the hole on the planetary gear shaft to lubricate the needle bearing on one side. The oil in the second oil sump (2) enters the second oil guide hole (2.21). The oil flows along the second oil guide hole (2.21) into the planetary gear shaft on the other side, and then enters the needle bearing through the holes on the planetary gear shaft to lubricate the needle bearing on the other side; During the rotation of the second oil sump (2), when the protruding baffle (8) is submerged in the oil in the oil pan, under the action of the rotational force, the protruding baffle (8) stirs up the oil in the oil pan and flings the oil in the oil pan into the planetary gear differential (6) to provide lubrication for the planetary gear differential (6).

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