An oil spray ring and planetary gear lubrication system

Abstract

An oil receiving spray ring and a planetary gear lubrication system, comprising an oil receiving ring with a hollow interior, the oil receiving ring comprising an outer ring and an inner ring, the inner ring being open, the diameter of a circular hole at the center of an outer side wall of the oil receiving ring being larger than the diameter of a circular hole at the center of an inner side wall, so as to facilitate receiving lubricating oil, a plurality of spray pipes are fixedly provided at intervals along an annular direction on the outer ring, the interior of the spray pipes is connected with the interior of the oil receiving ring, and a plurality of radial oil holes are provided at intervals along the axial direction of the spray pipes, the spray pipes are directly inserted into the planetary carrier, and the lubricating oil received by the oil receiving ring can be sprayed to the sun gear, the planetary gears and the outer gear ring by the spray pipes, so as to achieve lubrication of each gear structure, without the need to open a complex oil passage on the planetary carrier, thereby reducing the difficulty of processing.

Description

Technical Field

[0001] The invention relates to the technical field of planetary reduction, and in particular to an oil receiving spray ring and a planetary gear lubrication system. Background Art

[0002] High-speed motors and high-efficiency systems are the main development trends in the field of vehicle electric drive, which helps to reduce the size of motors and reduce the energy consumption of the entire vehicle. Dry sump lubrication is an effective measure to achieve high-efficiency electric drive. It reduces the amount of oil churning in the gears to reduce the effect of oil churning losses.

[0003] In the specific implementation of dry sump lubrication, such as the prior art publications CN110081150A, CN105705836A, etc., oil channels and oil holes are generally provided on the planetary carrier and the planetary wheel shaft to guide the lubricating oil, thereby achieving lubrication replenishment of the supporting bearing parts such as the planetary wheel support bearing and the planetary carrier support bearing.

[0004] However, the existing lubrication method is mainly aimed at the lubrication of the supporting bearings, while no targeted lubrication supplementary measures are taken for the lubrication of the gears. The conventional lubrication method is generally to set oil spray ports at the positions of the planetary carrier and the housing near the gear meshing position. This lubrication method is only applicable to parallel axis meshing gears with simple structures and matching methods. For the stepped planetary gear system containing an outer ring gear and stepped planetary gears, due to the complexity of its overall structure and matching method, the open space inside the housing is small and compact, which makes it difficult to set up oil spray ports and oil channels, and it is impossible to evenly spray the lubricating oil to the surface of each unit of the planetary gear, and each gear structure cannot be lubricated. Summary of the invention

[0005] In order to solve the technical problem in the above-mentioned background technology that the existing stepped planetary gear system does not take targeted lubrication supplementary measures for the gears, the oil channels are complex and difficult to process, resulting in difficulty in lubricating the sun gear, planetary gears and outer gear ring, the present invention provides an oil spray ring and a planetary gear lubrication system.

[0006] The technical solution of the present invention is as follows:

[0007] The invention provides an oil receiving spray ring, comprising: an oil receiving ring with a hollow interior, the oil receiving ring comprising an outer ring and an inner ring, the outer ring being fixedly provided with an inner side wall on one side close to the planetary carrier, and an outer side wall on the other side, the inner ring being open, the diameter of a circular hole at the center of the outer side wall being larger than the diameter of a circular hole at the center of the inner side wall, so as to receive lubricating oil and allow the lubricating oil to enter the oil receiving ring, a plurality of spray pipes for being inserted on the planetary carrier being fixedly provided at intervals along an annular direction on the outer ring, the axis of the spray pipe being parallel to the axis of the oil receiving ring, the interior of the spray pipe being communicated with the interior of the oil receiving ring, a plurality of radial oil holes being provided at intervals along the axial direction of the spray pipe, the radial oil holes being located on a side of the spray pipe close to the sun gear, the length of the spray pipe being not less than the axial length of the planetary gear, the spray pipe being directly inserted on the planetary carrier, no complex oil passage need be provided, thus reducing the difficulty of processing, and the spray pipe can be used to spray the lubricating oil received by the oil receiving ring to the sun gear, the planetary gear and the outer gear ring, so as to achieve lubrication of each gear structure.

[0008] Preferably, a lip is fixedly provided on the outside of the inner side wall of the oil collecting ring, and the lip is located on the circumferential side of the circular hole on the inner side wall. The lip is inclined toward the axial direction close to the oil collecting ring to improve the fit and sealing ability between the oil collecting ring and the planetary carrier, thereby preventing leakage and being able to absorb more lubricating oil.

[0009] Preferably, the diameter of the radial oil holes on the spray pipe close to the oil receiving ring is smaller than the diameter of the radial oil holes away from the oil receiving ring, so that the radial oil holes away from the oil receiving ring can have the same amount of oil as the radial oil holes close to the oil receiving ring, so as to ensure uniform oil distribution to the planetary gears.

[0010] Preferably, one end of the spray pipe away from the oil receiving ring is open to facilitate the lubricating oil to be discharged outwards.

[0011] Preferably, one end of the spray pipe away from the oil receiving ring is closed, so that all the lubricating oil can be discharged through the radial oil holes, thereby facilitating uniform spraying of the lubricating oil.

[0012] The present invention provides a planetary gear lubrication system, comprising: a planetary gear mechanism and an oil receiving spray ring, wherein the planetary gear mechanism comprises a sun gear, a planetary gear and an outer gear ring meshed in sequence in a housing, the sun gear is fixedly arranged on an input shaft, the planetary gear is rotatably arranged in a planetary carrier assembly, the gear ring of the planetary gear is exposed outwardly from the planetary carrier assembly, the planetary gear drives the output shaft to rotate through the planetary carrier assembly, the planetary carrier assembly is rotatably connected to the housing through a planetary carrier support bearing, an oil receiving spray ring is inserted on a side wall of the planetary carrier assembly close to the output shaft, the spray pipes and the planetary gears are alternately arranged, the lips are in contact with the outer wall of the adjacent planetary carrier assembly, and the planetary carrier support bearing An axial oil hole is provided in the output shaft in the area enclosed by the lip, and a radial oil hole is provided at a position of the output shaft near the planetary carrier support bearing. The lubricating oil is transported through the axial oil hole in the output shaft, and is thrown to the planetary carrier support bearing through the radial oil holes on the output shaft to lubricate the planetary carrier support bearing. An oil receiving ring is provided on the circumference of the planetary carrier support bearing. The lubricating oil after lubricating the planetary carrier support bearing enters the oil receiving ring under the cover of the lip, thereby receiving the lubricating oil, and then throwing the oil to the planetary gear, sun gear and outer ring gear through the spray pipe to achieve lubrication of the planetary gear row. There is no need to open complex oil channels and lubrication structures, thereby reducing processing costs.

[0013] Preferably, an axial oil hole is opened inside the input shaft, and a radial oil hole is opened at a position of the input shaft close to the planetary carrier support bearing. The axial oil hole inside the input shaft is connected with the axial oil hole inside the output shaft through an oil pipe, and an oil spray ring is inserted on the side wall of the planetary carrier assembly close to the input shaft, which can lubricate the support bearings at the input shaft.

[0014] Preferably, the planetary gear is fixedly connected to the planetary carrier assembly through a hollow axle, a bearing is provided between the planetary gear and the axle, an oil drain hole is opened on the side wall of the axle, a spray pipe is inserted in the axle, and the axle receives the lubricating oil of the planetary carrier support bearing at the input shaft through an oil receiving ring. The oil receiving ring can be used to receive the lubricating oil of the support bearing at the input shaft and guide the lubricating oil into the axle for lubrication of the planetary gear support bearing, thereby realizing lubrication of all moving parts of the planetary gear and each support bearing. There is no need to set up complex oil channels and lubrication structures in the planetary gear system, the structure is simple, and the processing cost is reduced.

[0015] Preferably, the oil pipe and the input shaft have a clearance fit, and the oil pipe and the output shaft have an interference fit, thereby avoiding direct transmission of force between the input shaft and the output shaft.

[0016] Preferably, a connecting hole is provided on one side of the planetary carrier assembly close to the output shaft, and a tooth groove matching the output shaft is provided on the inner wall of the connecting hole, thereby ensuring that the output shaft can move synchronously with the planetary carrier assembly under the drive of the planetary carrier assembly.

[0017] It can be seen from the above technical solutions that the advantages of the present invention are:

[0018] 1. The oil receiving spray ring is used for being inserted on the planetary carrier. The inner ring of the oil receiving spray ring is open, and the diameter of the circular hole at the center of the outer side wall is larger than the diameter of the circular hole at the center of the inner side wall, so as to receive the lubricating oil. A plurality of spray pipes are fixedly provided at intervals along the annular direction on the outer ring. The interior of the spray pipe is connected with the interior of the oil receiving ring, and a plurality of radial oil holes are provided at intervals along the axial direction of the spray pipe. The spray pipe is directly inserted on the planetary carrier, and the lubricating oil received by the oil receiving ring can be sprayed to the sun gear, planetary gears and outer gear ring by the spray pipe to realize the lubrication of each gear structure. There is no need to open a complex oil passage on the planetary carrier, thereby reducing the processing difficulty.

[0019] 2. A lip is fixed on the outside of the inner side wall of the oil receiving ring, which can improve the fit and sealing ability between the oil receiving ring and the planetary carrier. The diameter of the radial oil hole close to the oil receiving ring on the spray pipe is smaller than the diameter of the radial oil hole far from the oil receiving ring, so that the radial oil hole far from the oil receiving ring can have the same amount of oil as the radial oil hole close to the oil receiving ring, so as to ensure the uniformity of oil distribution to the planetary gears.

[0020] 3. Oil spray rings are installed on both sides of the planetary carrier assembly (i.e., the input shaft and the output shaft). The oil spray rings can receive the lubricating oil used to lubricate the planetary carrier support bearings, and then transport the lubricating oil to the planetary gears, sun gears, outer gear rings and planetary gear support bearings. Based on a single oil source, the lubrication of all moving parts of the planetary gears and support bearings is achieved, which provides a structural basis for dry oil pool lubrication. There is no need to set up complex oil channels and lubrication structures in the planetary gear system. The structure is simple and the processing cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an oil receiving spray ring according to one or more embodiments of the present invention;

[0023] Figure 2 is a schematic cross-sectional structure diagram of an oil receiving spray ring according to one or more embodiments of the present invention;

[0024] Figure 3 is a schematic cross-sectional structure diagram of another oil receiving spray ring according to one or more embodiments of the present invention;

[0025] Figure 4 A schematic diagram of an oil circuit of a planetary gear lubrication system according to one or more embodiments of the present invention;

[0026] Figure 5 It is a schematic diagram of an oil circuit of another planetary gear lubrication system according to one or more embodiments of the present invention;

[0027] Figure 6 is a schematic diagram of a partial cross-sectional structure of a planet carrier according to one or more embodiments of the present invention;

[0028] Figure 7 is a schematic structural diagram of a planetary gear according to one or more embodiments of the present invention;

[0029] Figure 8 A schematic diagram of an oil circuit of a planetary gear lubrication system in a three-dimensional perspective according to one or more embodiments of the present invention;

[0030] Fig. 9 A schematic diagram of the three-dimensional structure of a planetary gear lubrication system according to one or more embodiments of the present invention;

[0031] Fig.10 A schematic side view of a planetary gear lubrication system according to one or more embodiments of the present invention;

[0032] The components represented by the reference numerals in the figure are:

[0033] 1. Oil receiving ring; 101. Outer side wall; 102. Outer ring; 103. Inner side wall; 104. Lip; 2. Spray pipe; 201. First axial oil hole; 202. First radial oil hole; 203. Second radial oil hole; 204. Closing plate; 11. Output shaft; 1101. Second axial oil hole; 1102. Third radial oil hole; 12. First planetary carrier; 1201. First plug hole; 1202. First mounting hole; 13. Planetary carrier support bearing; 14. Oil receiving spray ring; 15. Second planetary carrier; 1501. Second plug hole; 1502. Second mounting hole; 16. Outer gear ring; 17. Housing; 1701. Oil hole; 18. Planetary gear; 19. Sun gear. DETAILED DESCRIPTION

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0035] Example 1

[0036] In a typical embodiment of the present invention, Figure 1-Figure 3 As shown, an oil receiving spray ring is proposed, comprising: an oil receiving ring 1 and a spray pipe 2, a plurality of spray pipes 2 are provided, and the plurality of spray pipes 2 are fixedly arranged on the oil receiving ring 1 at annular intervals, the interior of the spray pipe 2 is connected with the interior of the oil receiving ring 1, and the length of the spray pipe 2 is not less than the axial length of the planetary gear 18, so that the lubricating oil can be sprayed onto the planetary gear 18 through the spray pipe 2, and then the lubricating oil is applied to the sun gear 19 and the outer gear ring 16 during the meshing rotation.

[0037] like Figure 2 , Figure 3 As shown, the oil receiving ring 1 is a hollow annular structure opened inwardly, the inner ring of the oil receiving ring 1 is open, the outer ring 102 of the oil receiving ring 1 is a smooth arc surface, side walls are fixedly provided on both sides of the outer ring 102, a circular hole is opened at the center of the side walls on both sides of the outer ring 102, and the two circular holes are coaxially arranged, wherein the diameter of the circular hole on the outer side wall 101 of the oil receiving ring 1 is larger than the diameter of the circular hole on the inner side wall 103 thereof, the oil receiving ring 1 can be arranged on the planetary carrier assembly, and the inner side wall 103 is adjacent to the planetary carrier, which can block and receive the lubricating oil used to lubricate the planetary carrier support bearing 13.

[0038] A lip 104 is fixedly provided on the outside of the inner side wall 103 of the oil receiving ring 1. The lip 104 is located on the circumferential side of the circular hole on the inner side wall 103. The lip 104 is coaxially arranged with the circular hole on the inner side wall 103. The lip 104 is inclined toward the axial direction close to the oil receiving ring 1, and the lip 104 extends in the direction away from the outer side wall 101, so that there is a line contact between the circular hole on the inner side wall 103 of the oil receiving ring 1 and the adjacent planetary carrier, so as to improve the fit and sealing ability between the oil receiving ring 1 and the planetary carrier, so as to prevent leakage and receive more lubricating oil.

[0039] One end of the spray pipe 2 is fixedly arranged on the outer ring 102 of the oil receiving ring 1, and the spray pipe 2 extends in the direction away from the inner side wall 103 of the oil receiving ring 1. The axis of the spray pipe 2 is parallel to the axis of the oil receiving ring 1. The spray pipe 2 is a hollow structure. The interior of the spray pipe 2 is provided with a first axial oil hole 201 along its axial direction. The first axial oil hole 201 is connected with the interior of the oil receiving ring 1. The lubricating oil received by the oil receiving ring 1 can be thrown to the inner wall of the outer ring 102 during the rotation of the oil receiving ring 1 and enter the first axial oil hole 201 of the spray pipe 2.

[0040] The spray pipe 2 is also provided with a plurality of radial oil holes spaced apart along its axial direction. The radial oil holes are located on the side of the spray pipe 2 close to the sun gear 19. The radial oil holes are connected to the first axial oil hole 201 so as to spray the lubricating oil in the spray pipe 2 toward the planetary gears, and then to lubricate the sun gear 19, the planetary gears 18 and the outer gear ring 16. In this embodiment, the inner diameter of the spray pipe 2 is 5-10 mm, and the diameter of the radial oil holes is between 1-5 mm.

[0041] The diameter of the radial oil hole on the spray pipe 2 close to the oil receiving ring 1 is smaller than the diameter of the radial oil hole far from the oil receiving ring 1, so that the radial oil hole far from the oil receiving ring 1 can have the same amount of oil as the radial oil hole close to the oil receiving ring 1, so as to ensure the uniformity of oil distribution to the planetary gear. In this embodiment, the spray pipe 2 is provided with a first radial oil hole 202 and a second radial oil hole 203, the first radial oil hole 202 is close to the oil receiving ring 1, and the diameter of the first radial oil hole 202 is smaller than the diameter of the second radial oil hole 203.

[0042] The spray pipe 2 is used for inserting and passing through the planetary carrier. The arrangement of the spray pipe 2 and the oil receiving ring 1 eliminates the need to lay oil passages on the planetary carrier and the housing, reduces the processing difficulty, and facilitates the guided transportation and spraying of the lubricating oil.

[0043] In order to ensure that the oil receiving spray ring 14 has excellent molding ability, oil resistance, structural strength and heat resistance so that it can be used in high-temperature rotating conditions, the oil receiving spray ring 14 is made entirely of glass fiber material.

[0044] In the present embodiment, the end of the spray pipe 2 away from the oil receiving ring 1 is open, and is inserted into the side wall of the planetary frame / inserted into the axle of the planetary wheel during installation and use, and is sealed by the side wall of the planetary frame / the axle of the planetary wheel. In other embodiments, the end of the spray pipe 2 away from the oil receiving ring 1 is a closed end, and a sealing plate 204 is fixedly provided at this time to seal it, so that all the lubricating oil from the oil receiving ring 1 is thrown out from the radial oil holes of the spray pipe 2 and does not leak out from the end of the spray pipe 2.

[0045] It is understandable that the specific arrangement of the end of the spray pipe 2 away from the oil receiving ring 1 can be determined according to actual design requirements, and no excessive restrictions are made here.

[0046] Example 2

[0047] In another typical embodiment of the present invention, Figure 4-Figure 10 As shown, a planetary gear lubrication system is proposed, comprising: the oil spray ring 14 mentioned in Example 1 and a planetary gear mechanism.

[0048] The planetary gear mechanism includes an input shaft, an output shaft 11 , a planet carrier assembly, an outer ring gear 16 , a housing 17 , planetary gears 18 and a sun gear 19 . The planet carrier assembly, the outer ring gear 16 , the planetary gears 18 and the sun gear 19 are all installed in the housing 17 .

[0049] Among them, the input shaft and the output shaft 11 both pass through the housing 17, the sun gear 19 is fixedly connected to the input shaft by a coupling or a key connection, the input shaft transmits external power to the sun gear 19, the sun gear 19 is located in the planetary carrier assembly, and a plurality of planetary gears 18 are arranged inside the planetary carrier assembly. The planetary gears 18 are fixedly connected to the planetary carrier assembly through the wheel axle, and the planetary gears 18 are rotatably connected to the wheel axle through bearings. The wheel axle is a hollow structure, and an oil drain hole is opened on the side wall of the wheel axle for lubrication of the bearings. The planetary gears 18 are arranged at intervals along the circumferential direction, and all the planetary gears 18 are meshed with the sun gear 19. When the sun gear 19 rotates, the planetary gears 18 both revolve around the sun gear 19 and rotate around their own axes. Figure 7 As shown, the planetary gear 18 in this embodiment is a stepped planetary gear, comprising a coaxially arranged large end ring gear and a small end ring gear, wherein the large end ring gear is used to mesh with the sun gear 19 , and the small end ring gear is used to mesh with the outer ring gear 16 .

[0050] The outer ring gear 16 is fixedly installed in the housing 17 by bolting or the like. The small end ring gear of the planetary gear 18 meshes with the outer ring gear 16, which can not only achieve different transmission ratios but also ensure that the planetary gear 18 can move according to a predetermined trajectory, thereby increasing the stability and reliability of the planetary gear system. The outer ring gear 16, as a co-acting component, can bear part of the load, thereby reducing the burden on other components and improving the carrying capacity of the system.

[0051] like Figure 6 As shown, the planet carrier assembly includes a first planet carrier 12 and a second planet carrier 15, the first planet carrier 12 and the second planet carrier 15 are butted against each other and fixed by bolting, welding, etc., a plurality of first plug holes 1201 and a plurality of first mounting holes 1202 are arranged at intervals along the circumferential direction on the first planet carrier 12, and the first plug holes 1201 and the first mounting holes 1202 are alternately arranged along the circumferential direction of the first planet carrier 12; a plurality of second plug holes 1501 and a plurality of second mounting holes 1502 are arranged at intervals along the circumferential direction on the second planet carrier 15, and the second plug holes 1501 and the first mounting holes 1502 are alternately arranged along the circumferential direction The two mounting holes 1502 are alternately arranged along the circumferential direction of the second planetary carrier 15, wherein the first insertion hole 1201 passes through the first planetary carrier 12, and the second insertion hole 1501 does not pass through the second planetary carrier 15, the first insertion hole 1201 corresponds to the second insertion hole 1501 one-to-one, and is used for the insertion of the spray pipe 2, the first mounting hole 1202 corresponds to the second mounting hole 1502 one-to-one, and is used for the fixed installation of the axle of the planetary gear 18, and there is an opening between the first planetary carrier 12 and the second planetary carrier 15 to allow the ring gear of the planetary gear 18 to be exposed outward and mesh with the outer ring gear 16.

[0052] A connecting hole is provided at the center of the first planet carrier 12, and a tooth groove matching the output shaft 11 is provided on the inner wall of the connecting hole. When the planetary gear 18 revolves, the planet carrier assembly is driven to rotate, and then the output shaft 11 is driven to rotate around the axis through the planet carrier assembly.

[0053] The planetary gear assembly is rotatably connected to the housing 17 via the planet carrier support bearing 13 , and the input shaft and the output shaft 11 are rotatably connected to the housing 17 via the support bearing as well.

[0054] Since the input shaft is connected to the motor, if you want to transport oil, you need to guide the oil into the input shaft from the circumference, which is difficult to process. Therefore, the oil is transported through the output shaft 11, such as Figure 4 As shown, a second axial oil hole 1101 is opened inside the output shaft 11 along its axial direction, and a third radial oil hole 1102 is opened on the side wall of the output shaft 11 near the position of the planetary carrier support bearing 13. The third radial oil hole 1102 is connected to the second axial oil hole 1101. The lubricating oil is transported through the second axial oil hole 1101 and thrown to the planetary carrier support bearing 13 through the third radial oil hole 1102 to lubricate the planetary carrier support bearing 13 and the support bearing of the output shaft 11.

[0055] An axial oil hole is also provided inside the input shaft, and a radial oil hole is provided on the outer wall of the input shaft near the planetary carrier support bearing 13. The axial oil hole inside the input shaft is connected to the second axial oil hole 1101 inside the output shaft 11 through an oil pipe. The oil pipe and the second axial oil hole 1101 have an interference fit, and the oil pipe and the axial oil hole in the input shaft have a clearance fit. The lubricating oil can enter the input shaft through the oil pipe and be thrown to the planetary carrier support bearing 13 of the second planetary carrier 15 and the support bearing of the input shaft through the radial oil hole for lubrication of the bearings, and the oil pipe will not cause direct transmission of force between the input shaft and the output shaft 11.

[0056] An oil receiving spray ring 14 is respectively inserted on both sides of the planetary carrier assembly. This embodiment is described with a first oil receiving spray ring and a second oil receiving spray ring. Specifically, the inner side wall 103 of the first oil receiving spray ring is close to the first planetary carrier 12, and fits with the outer wall of the first planetary carrier 12 through the lip 104. The planetary carrier support bearing 13 is located in the area enclosed by the lip 104. The lubricating oil after lubricating the planetary carrier support bearing 13 enters the oil receiving ring 1 under the cover of the lip 104, thereby realizing the acceptance of the lubricating oil. One end of the spray pipe 2 of the first oil receiving spray ring passes through the first plug hole 1201 and is inserted into the second plug hole 1501. The lubricating oil received by the oil receiving ring 1 is thrown to the planetary gear 18, the sun gear 19 and the outer gear ring 16 through the first axial oil hole 201 and the first radial oil hole 202 and the second radial oil hole 203 of the spray pipe 2 to realize the lubrication of the planetary gear.

[0057] The inner side wall 103 of the second oil receiving spray ring is close to the second planetary carrier 15, and is fitted with the outer wall of the second planetary carrier 15 through the lip 104. The planetary carrier support bearing 13 is located in the area enclosed by the lip 104. The lubricating oil after lubricating the planetary carrier support bearing 13 enters the oil receiving ring 1 under the cover of the lip 104, thereby realizing the reception of the lubricating oil. The spray pipe 2 of the second oil receiving spray ring is inserted in the axle of the planetary gear 18 to transport the lubricating oil to the axle, and transport the lubricating oil to the support bearing of the planetary gear through the oil hole on the axle to complete the lubrication of the planetary gear support bearing.

[0058] The oil spray ring 14 can be used to lubricate all moving parts of the planetary gears and supporting bearings, providing a structural basis for dry oil pool lubrication. There is no need to set up complex oil channels and lubrication structures in the planetary gear system, the structure is simple, and the processing cost is reduced.

[0059] like Figure 5 As shown, in other embodiments, an oil hole 1701 may be provided on the housing 17 to directly inject lubricating oil into the oil receiving ring 1 through the oil hole 1701 to achieve active lubrication of all the gears of the planetary gearbox.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A planetary gear lubrication system, characterized in that: include: A planetary gear mechanism comprises a housing (17), a sun gear (19), a planet gear (18), an input shaft, an output shaft (11) and a planet carrier assembly, wherein the planet carrier assembly and the housing (17) are rotatably connected via a planet carrier support bearing (13), the sun gear (19) is fixedly arranged on the input shaft, an axial oil hole is provided inside the input shaft, a radial oil hole is provided near the planet carrier support bearing (13), the planet gear (18) meshes with the sun gear (19), the planet gear (18) is rotatably arranged in the planet carrier assembly via a hollow wheel shaft, the gear ring of the planet gear (18) is exposed to the outside of the planet carrier assembly, and the output shaft (11) is driven to rotate via the planet carrier assembly, an axial oil hole is provided inside the output shaft (11), a radial oil hole is provided near the planet carrier support bearing (13), and the axial oil hole of the input shaft is connected to the axial oil hole of the output shaft (11) via an oil pipe; The oil receiving spray ring (14) comprises a hollow oil receiving ring (1), the oil receiving ring (1) comprising an inner ring and an outer ring (102), the inner ring being open, a plurality of spray pipes (2) for being inserted into the planetary carrier assembly being provided at intervals along the circumferential direction on the outer ring (102), the spray pipes (2) being connected to the interior of the oil receiving ring (1), and a plurality of radial oil holes being provided at intervals along the axial direction of the spray pipe (2); A first oil receiving spray ring for lubricating the gear ring is inserted on one side of the planetary carrier assembly close to the output shaft (11), and the spray pipe (2) of the first oil receiving spray ring is arranged alternately with the planetary gear (18). A second oil receiving spray ring is inserted on one side of the planetary carrier assembly close to the input shaft, and the spray pipe (2) of the second oil receiving spray ring is inserted in the wheel shaft. The second oil receiving spray ring is used to receive the lubricating oil discharged from the input shaft and transport it to the support bearing of the planetary gear.

2. A planetary gear lubrication system according to claim 1, characterized in that: The planetary gear (18) is fixedly connected to the planetary carrier assembly via a hollow wheel shaft, a bearing is provided between the planetary gear (18) and the wheel shaft, an oil drain hole is provided on the side wall of the wheel shaft, and the wheel shaft receives lubricating oil from the planetary carrier support bearing (13) at the input shaft via an oil receiving ring (1) of a second oil receiving spray ring.

3. A planetary gear lubrication system according to claim 1, characterized in that: The oil pipe and the input shaft have a clearance fit, and the oil pipe and the output shaft (11) have an interference fit.

4. A planetary gear lubrication system according to claim 1, characterized in that: A connecting hole is provided on one side of the planet carrier assembly close to the output shaft (11), and a tooth groove matching the output shaft (11) is provided on the inner wall of the connecting hole.

5. The planetary gear lubrication system according to claim 1, characterized in that: An inner side wall (103) is fixedly provided on one side of the outer ring (102) close to the planetary frame of the planetary frame assembly, and an outer side wall (101) is fixedly provided on the other side. The diameter of the circular hole at the center of the outer side wall (101) is larger than the diameter of the circular hole at the center of the inner side wall (103). The axis of the spray pipe (2) is parallel to the axis of the oil receiving ring (1). The spray pipe (2) is provided with a plurality of radial oil holes spaced apart along its axial direction. The radial oil holes are located on a side of the spray pipe (2) close to the sun gear (19). The length of the spray pipe (2) is not less than the axial length of the planetary gear (18).

6. The planetary gear lubrication system according to claim 5, characterized in that: A lip edge (104) is fixedly provided on the outside of the inner side wall (103) of the oil receiving ring (1). The lip edge (104) is located on the circumference of the circular hole on the inner side wall (103). The lip edge (104) is inclined toward the axial direction close to the oil receiving ring (1). The lip edge (104) is in contact with the outer wall of the adjacent planetary carrier assembly. The planetary carrier support bearing (13) is located in the area enclosed by the lip edge (104).

7. The planetary gear lubrication system according to claim 1, characterized in that: The diameter of the radial oil hole on the spray pipe (2) close to the oil receiving ring (1) is smaller than the diameter of the radial oil hole far from the oil receiving ring (1).

8. The planetary gear lubrication system according to claim 1, characterized in that: The end of the spray pipe (2) away from the oil receiving ring (1) is open.

9. The planetary gear lubrication system according to claim 1, characterized in that: The end of the spray pipe (2) away from the oil receiving ring (1) is closed.

Images