Oil receiving spray ring and planetary gear train gear lubrication system

Abstract

An oil receiving spray ring and a planetary gear train gear lubrication system. The oil receiving spray ring comprises an internally hollow oil receiving ring, the oil receiving ring comprises an outer ring and an inner ring, the inner ring is open, and the diameter of a circular hole at the center of the outer side wall of the oil receiving ring is greater than the diameter of a circular hole at the center of the inner side wall of the oil receiving ring, so as to facilitate receiving lubricating oil; a plurality of spray pipes are fixedly arranged on the outer ring at intervals in the circumferential direction, the interiors of the spray pipes are communicated with the interior of the oil receiving ring, a plurality of radial oil holes are formed in each spray pipe at intervals in the axial direction thereof, the spray pipes are directly inserted into a planetary carrier, and the lubricating oil received by the oil receiving ring can be sprayed to a sun gear, planetary gears, and an outer ring gear by means of the spray pipes, so as to achieve lubrication of various gear structures. There is no need to provide a complex oil passage on the planetary carrier, thereby reducing the processing difficulty.

Description

An oil spray ring and planetary gear lubrication system Technical Field

[0001] This invention relates to the field of planetary gear reduction technology, and in particular to an oil spray ring and a planetary gear lubrication system. Background Technology

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

[0003] In specific implementations of dry oil bath lubrication, such as existing technologies published in CN110081150A and CN105705836A, oil passages and oil holes are generally provided on the planetary carrier and planetary gear shaft to guide the lubricating oil, thereby achieving lubrication supplementation for support bearing parts such as planetary gear support bearings and planetary carrier support bearings.

[0004] However, existing lubrication methods mainly target the lubrication of support bearings, and do not take targeted supplementary lubrication measures for gears. Conventional lubrication methods generally set oil spray ports near the gear meshing points on the planetary carrier and housing. This lubrication method is only suitable for gears with simple structures and mating methods that mesh in parallel shafts. For stepped planetary gear systems containing external gear rings and stepped planetary gears, the complexity of their overall structure and mating methods makes the open space inside the housing small and compact, which makes it difficult to set up oil spray ports and oil passages, and it is impossible to spray lubricating oil evenly onto the surface of each unit of the planetary gear set, so the gear structure cannot be lubricated. Summary of the Invention

[0005] To address the technical problems in the existing stepped planetary gear system mentioned above, which lacks targeted lubrication supplementation measures for the gears, has complex oil passages and is difficult to process, resulting in difficulty in lubricating the sun gear, planet gears and external gear ring, this invention provides an oil spray ring and a planetary gear lubrication system.

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

[0007] This invention provides an oil receiving spray ring, comprising: a hollow oil receiving ring, the oil receiving ring having an outer ring and an inner ring, the outer ring having an inner sidewall fixedly provided on one side near the planetary carrier, and an outer sidewall fixedly provided on the other side, the inner ring being open, the diameter of the circular hole at the center of the outer sidewall being larger than the diameter of the circular hole at the center of the inner sidewall, so as to receive lubricating oil and allow the lubricating oil to enter the oil receiving ring, a plurality of spray pipes for insertion onto the planetary carrier are fixedly provided circumferentially on the outer ring, the axis of the spray pipes being parallel to the axis of the oil receiving ring, the interior of the spray pipes being connected to the interior of the oil receiving ring, a plurality of radial oil holes being spaced apart along the axial direction on the spray pipes, the radial oil holes being located on the side of the spray pipes near the sun gear, the length of the spray pipes being not less than the axial length of the planetary gears, the spray pipes being directly inserted onto the planetary carrier, eliminating the need for complex oil passages, reducing the processing difficulty, and enabling the spray pipes to spray the lubricating oil received by the oil receiving ring onto the sun gear, planetary gears and external gear ring, thereby achieving lubrication of each gear structure.

[0008] Preferably, the outer side of the inner sidewall of the oil receiving ring is fixedly provided with a lip. The lip is located on the periphery of the circular hole on the inner sidewall and is inclined towards the axis of the oil receiving ring to improve the fit and sealing ability between the oil receiving ring and the planetary carrier, thereby preventing leakage and accommodating more lubricating oil.

[0009] Preferably, the diameter of the radial oil hole near the oil receiving ring on the spray pipe is smaller than the diameter of the radial oil hole away from the oil receiving ring, so that the radial oil hole away from the oil receiving ring can have the same amount of oil as the radial oil hole near the oil receiving ring, thereby ensuring the uniformity of oil distribution to the planetary gear set.

[0010] Preferably, the end of the spray pipe away from the oil receiving ring is open to facilitate the outward discharge of lubricating oil.

[0011] Preferably, the end of the spray pipe away from the oil receiving ring is closed, which allows all the lubricating oil to be discharged through the radial oil hole, facilitating the uniform spraying of the lubricating oil.

[0012] This invention provides a planetary gear set lubrication system, comprising: a planetary gear set mechanism and an oil spray ring. The planetary gear set mechanism includes a sun gear, planet gears, and an external gear ring that mesh sequentially within a housing. The sun gear is fixedly mounted on an input shaft. The planet gears are rotatably mounted within a planet carrier assembly. The gear rings of the planet gears protrude outward from the planet carrier assembly. The planet gears drive the output shaft to rotate via the planet carrier assembly. The planet carrier assembly and the housing are rotatably connected via a planet carrier support bearing. An oil spray ring is inserted into the side wall of the planet carrier assembly near the output shaft. Spray pipes are alternately arranged with the planet gears, and their lips are in contact with the outer wall of the adjacent planet carrier assembly. The planet carrier support bearing... Within the area enclosed by the lip, the output shaft has an axial oil hole, and a radial oil hole is provided near the planetary carrier support bearing. Lubricating oil is delivered through the axial oil hole in the output shaft and splashed to the planetary carrier support bearing through the radial oil hole on the output shaft to lubricate the planetary carrier support bearing. An oil receiving ring is provided around the planetary carrier support bearing. After lubricating the planetary carrier support bearing, the lubricating oil enters the oil receiving ring under the protection of the lip, thereby realizing the collection of lubricating oil. Then, it is splashed to the planet gears, sun gear and external gear ring through the spray pipe to achieve the lubrication of the planetary gear set. There is no need to open a complex oil passage and lubrication structure, which reduces the processing cost.

[0013] Preferably, the input shaft has an axial oil hole inside, and the input shaft has a radial oil hole near the planetary carrier support bearing. The axial oil hole inside the input shaft is connected to the axial oil hole inside the output shaft through an oil pipe. An oil spray ring is inserted into the side wall of the planetary carrier assembly near the input shaft to lubricate the support bearings at the input shaft.

[0014] Preferably, the planetary gears are fixedly connected to the planetary carrier assembly via a hollow axle. A bearing is provided between the planetary gears and the axle. An oil drain hole is provided on the side wall of the axle. A spray pipe is inserted into the axle. The axle receives the lubricating oil from the planetary carrier support bearing at the input shaft via an oil receiving ring. The oil receiving ring can be used to receive the lubricating oil from the support bearing at the input shaft and guide the lubricating oil into the axle for lubrication of the planetary gear support bearing. This achieves lubrication of all moving parts of the planetary gear set and each support bearing, eliminating the need for complex oil passages and lubrication structures in the planetary gear set system. The structure is simple and reduces processing costs.

[0015] Preferably, the oil pipe is clearance-fitted with the input shaft and interference-fitted with the output shaft, thus avoiding direct force transmission between the input and output shafts.

[0016] Preferably, the planetary carrier assembly has a connecting hole on the side near the output shaft, and the inner wall of the connecting hole has a toothed groove that mates with the output shaft, ensuring that the output shaft can move synchronously with the planetary carrier assembly under its drive.

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

[0018] 1. The oil-receiving spray ring is used for insertion onto 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 sidewall is larger than the diameter of the circular hole at the center of the inner sidewall, which facilitates the collection of lubricating oil. Several spray pipes are fixedly installed at intervals along the circumference of the outer ring. The interior of the spray pipes is connected to the interior of the oil-receiving ring, and several radial oil holes are opened at intervals along the axial direction of the spray pipes. The spray pipes are directly inserted into the planetary carrier, and the lubricating oil collected by the oil-receiving ring can be sprayed onto the sun gear, planet gears and external gear ring to achieve lubrication of each gear structure. There is no need to open complex oil passages on the planetary carrier, which reduces the processing difficulty.

[0019] 2. The outer sidewall of the inner sidewall of the oil receiving ring is fixed with a lip, which can improve the fit and sealing ability between the oil receiving ring and the planetary gear set. The diameter of the radial oil hole on the spray pipe near the oil receiving ring is smaller than the diameter of the radial oil hole away from the oil receiving ring, so that the radial oil hole away from the oil receiving ring can have the same amount of oil as the radial oil hole near the oil receiving ring, so as to ensure the uniformity of oil distribution to the planetary gear set.

[0020] 3. Both sides of the planetary carrier assembly (i.e., at the input and output shafts) are fitted with oil spray rings, which can collect the lubricating oil used to lubricate the planetary carrier support bearings and then spray the lubricating oil to the planetary gears, sun gear, external gear ring, and planetary gear support bearings. Based on a single oil source, the lubrication of all moving parts of the planetary gear set and each support bearing is achieved, providing a structural basis for dry oil bath lubrication. There is no need to set up complex oil passages and lubrication structures in the planetary gear set system, which simplifies the structure and reduces the processing cost. Attached Figure Description

[0021] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the oil spraying ring according to one or more embodiments of the present invention;

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

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

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

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

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

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

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

[0030] Figure 9 is a three-dimensional structural schematic diagram of the planetary gear lubrication system according to one or more embodiments of the present invention;

[0031] Figure 10 is a side view of the planetary gear lubrication system according to one or more embodiments of the present invention.

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

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

[0034] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent. Example

[0035] In a typical embodiment of the present invention, as shown in Figures 1-3, an oil receiving spray ring is proposed, comprising: an oil receiving ring 1 and spray pipes 2. Several spray pipes 2 are provided, and the several spray pipes 2 are fixedly arranged on the oil receiving ring 1 at intervals along the circumferential direction. The interior of the spray pipes 2 is connected to the interior of the oil receiving ring 1. The length of the spray pipes 2 is not less than the axial length of the planetary gear 18, so that lubricating oil can be sprayed onto the planetary gear 18 through the spray pipes 2, and then the lubricating oil is applied to the sun gear 19 and the external gear ring 16 during meshing and rotation.

[0036] As shown in Figures 2 and 3, the oil receiving ring 1 is a hollow annular structure with an inward opening. The inner ring of the oil receiving ring 1 is open, and the outer ring 102 of the oil receiving ring 1 is a smooth arc surface. Side walls are fixed on both sides of the outer ring 102. A circular hole is opened at the center of each side wall on both sides of the outer ring 102, and the two circular holes are coaxially arranged. 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 its inner side wall 103. The oil receiving ring 1 can be set 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.

[0037] The inner sidewall 103 of the oil receiving ring 1 is fixedly provided with a lip 104. The lip 104 is located on the periphery of the circular hole on the inner sidewall 103. The lip 104 is coaxially arranged with the circular hole on the inner sidewall 103. The lip 104 is inclined towards the axis of the oil receiving ring 1 and extends away from the outer sidewall 101, so that the circular hole on the inner sidewall 103 of the oil receiving ring 1 is in line contact with the adjacent planetary carrier, thereby improving the fit and sealing ability between the oil receiving ring 1 and the planetary carrier, thus preventing leakage and being able to hold more lubricating oil.

[0038] One end of the spray pipe 2 is fixedly mounted on the outer ring 102 of the oil receiving ring 1. The spray pipe 2 extends in a 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 has 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 to 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 and enter the first axial oil hole 201 of the spray pipe 2 during the rotation of the oil receiving ring 1.

[0039] The spray pipe 2 is also provided with a number of radial oil holes spaced apart along its axial direction. The radial oil holes are located on the side of the spray pipe 2 near the sun gear 19. The radial oil holes are connected to the first axial oil hole 201 to spray the lubricating oil in the spray pipe 2 to the planetary gear set, thereby lubricating the sun gear 19, planet gear 18 and external 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.

[0040] The diameter of the radial oil hole on the spray pipe 2 near the oil receiving ring 1 is smaller than the diameter of the radial oil hole away from the oil receiving ring 1, so that the radial oil hole away from the oil receiving ring 1 can have the same amount of oil as the radial oil hole near 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.

[0041] The spray pipe 2 is used to insert and pass through the planetary carrier. The setting of the spray pipe 2 and the oil receiving ring 1 eliminates the need to lay oil channels on the planetary carrier and the housing, reducing the processing difficulty and facilitating the guidance, delivery and spraying of lubricating oil.

[0042] To ensure that the oil spray ring 14 has excellent molding ability, oil resistance, structural strength and heat resistance, and can be used in high-temperature rotation conditions, the oil spray ring 14 is made of glass fiber material.

[0043] In this embodiment, the end of the spray pipe 2 away from the oil receiving ring 1 is open. During installation and use, it is inserted into the side wall of the planetary carrier / inside the axle of the planetary gear, and sealed by the side wall of the planetary carrier / the axle of the planetary gear. In other embodiments, the end of the spray pipe 2 away from the oil receiving ring 1 is closed. In this case, a sealing plate 204 is fixedly provided to seal the oil, so that all the lubricating oil from the oil receiving ring 1 is thrown out through the radial oil hole of the spray pipe 2 and does not leak outward from the end of the spray pipe 2.

[0044] It is understandable that the specific configuration of the end of the spray pipe 2 away from the oil receiving ring 1 can be determined according to the actual design requirements, and no further restrictions will be imposed here. Example

[0045] In another typical embodiment of the present invention, as shown in Figures 4-10, a planetary gear lubrication system is proposed, comprising: the oil spray ring 14 mentioned in Embodiment 1 and the planetary gear mechanism.

[0046] The planetary gear mechanism includes an input shaft, an output shaft 11, a planetary carrier assembly, an external gear ring 16, a housing 17, planetary gears 18, and a sun gear 19. The planetary carrier assembly, the external gear ring 16, the planetary gears 18, and the sun gear 19 are all installed inside the housing 17.

[0047] The input shaft and output shaft 11 both penetrate the housing 17. The sun gear 19 is fixedly connected to the input shaft via a coupling or key. The input shaft transmits external power to the sun gear 19, which is located inside the planetary carrier assembly. The planetary carrier assembly contains several planetary gears 18, which are fixedly connected to the planetary carrier assembly via axles. The planetary gears 18 and axles are rotatably connected via bearings. The axles are hollow and have oil drain holes on their sidewalls for bearing lubrication. The planetary gears 18 are spaced circumferentially, and all planetary gears 18 mesh with the sun gear 19. When the sun gear 19 rotates, the planetary gears 18 revolve around the sun gear 19 and rotate on their own axes, as shown in Figure 7. In this embodiment, the planetary gears 18 are stepped planetary gears, containing a large-end gear ring and a small-end gear ring coaxially arranged. The large-end gear ring meshes with the sun gear 19, and the small-end gear ring meshes with the outer gear ring 16.

[0048] The external gear ring 16 is fixedly installed in the housing 17 by bolting or other means. The small end gear ring of the planetary gear 18 meshes with the external gear ring 16, which not only enables different transmission ratios, but also ensures that the planetary gear 18 can move according to a predetermined trajectory, increasing the stability and reliability of the planetary gear system. As a cooperating component, the external gear ring 16 can bear part of the load, thereby reducing the burden on other components and improving the load-bearing capacity of the system.

[0049] As shown in Figure 6, the planetary carrier assembly includes a first planetary carrier 12 and a second planetary carrier 15. The first planetary carrier 12 and the second planetary carrier 15 are connected and fixed by bolting, welding, or other methods. The first planetary carrier 12 has a plurality of first insertion holes 1201 and a plurality of first mounting holes 1202 spaced apart along the circumference, and the first insertion holes 1201 and the first mounting holes 1202 are alternately arranged along the circumference of the first planetary carrier 12. The second planetary carrier 15 has a plurality of second insertion holes 1501 and a plurality of second mounting holes 1502 spaced apart along the circumference, and the second insertion holes 1501 and... The second mounting holes 1502 are alternately arranged circumferentially along the second planetary carrier 15. The first insertion hole 1201 penetrates the first planetary carrier 12, while the second insertion hole 1501 does not penetrate the second planetary carrier 15. The first insertion hole 1201 and the second insertion hole 1501 correspond one-to-one for the insertion of the spray pipe 2. The first mounting hole 1202 and the second mounting hole 1502 correspond one-to-one for the fixed installation of the planetary gear 18 shaft. There is an opening between the first planetary carrier 12 and the second planetary carrier 15 to allow the planetary gear 18 gear ring to protrude outward and mesh with the outer gear ring 16.

[0050] The first planetary carrier 12 has a connecting hole at its center. The inner wall of the connecting hole has a toothed groove that mates with the output shaft 11. When the planetary gear 18 revolves, it drives the planetary carrier assembly to rotate, which in turn drives the output shaft 11 to rotate around the axis.

[0051] The planetary gear assembly is rotatably connected to the housing 17 via a planetary carrier support bearing 13, and the input shaft and output shaft 11 are also rotatably connected to the housing 17 via support bearings.

[0052] Since the input shaft is connected to the motor, oil needs to be introduced from the circumference into the input shaft for oil delivery, which is difficult to process. Therefore, oil is delivered through the output shaft 11, as shown in Figure 4. The output shaft 11 has a second axial oil hole 1101 inside along its axial direction. A third radial oil hole 1102 is provided on the side wall of the output shaft 11 near the planetary carrier support bearing 13. The third radial oil hole 1102 communicates with the second axial oil hole 1101. Lubricating oil is delivered 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.

[0053] 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 are interference-fitted, and the oil pipe and the axial oil hole inside the input shaft are clearance-fitted. 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 bearing lubrication. The oil pipe will not cause direct force transmission between the input shaft and the output shaft 11.

[0054] An oil-receiving spray ring 14 is inserted on each side of the planetary carrier assembly. This embodiment is described using the first oil-receiving spray ring and the second oil-receiving spray ring. Specifically, the inner sidewall 103 of the first oil-receiving spray ring is close to the first planetary carrier 12 and is in contact 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. After the planetary carrier support bearing 13 is lubricated, the lubricating oil enters the oil-receiving ring 1 under the cover of the lip 104, thereby realizing the collection of lubricating oil. One end of the spray pipe 2 of the first oil-receiving spray ring passes through the first insertion hole 1201 and is inserted into the second insertion hole 1501. The lubricating oil collected by the oil-receiving ring 1 is splashed to the planetary gear 18, the sun gear 19 and the external 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 set.

[0055] The inner sidewall 103 of the second oil-receiving spray ring is close to the second planetary carrier 15 and is in contact 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. After the planetary carrier support bearing 13 is lubricated, the lubricating oil 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 into the axle of the planetary gear 18 to deliver the lubricating oil to the axle and deliver 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.

[0056] The lubrication of all moving parts of the planetary gear set and each supporting bearing can be achieved through the oil spray ring 14, which provides a structural basis for dry oil bath lubrication. There is no need to set up complex oil passages and lubrication structures in the planetary gear set system. The structure is simple and the processing cost is reduced.

[0057] As shown in Figure 5, in other embodiments, an oil hole 1701 can be opened on the housing 17 to directly inject lubricating oil into the oil receiving ring 1 through the oil hole 1701, so as to achieve active lubrication of all gears of the planetary gear set.

[0058] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oil pick-up spray ring for fitting on a planet carrier, comprising: The internal hollow oil receiving ring (1) contains an outer ring (102) and an inner ring. The outer ring (102) is fixedly provided with an inner side wall (103) on one side close to the planet carrier and an outer side wall (101) on the other side. The inner ring is open. The diameter of the circular hole at the center of the outer side wall (101) is larger than that of the circular hole at the center of the inner side wall (103). A plurality of spray pipes (2) for being inserted on the planet carrier are fixedly arranged on the outer ring (102) in a ring direction. The axis of the spray pipe (2) is parallel to the axis of the oil receiving ring (1). The inside of the spray pipe (2) is communicated with the inside of the oil receiving ring (1). A plurality of radial oil holes are arranged on the spray pipe (2) in an axial direction. The radial oil holes are located on the 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 planet gear (18).

2. An oil pickup ring according to claim 1, wherein The outer part of the inner side wall (103) of the oil receiving ring (1) is fixedly provided with a lip (104). The lip (104) is located on the circumferential side of the circular hole on the inner side wall (103) and is inclined towards the direction close to the axis of the oil receiving ring (1).

3. An oil pickup ring according to claim 1, wherein The diameter of the radial oil hole on the spray pipe (2) close to the oil receiving ring (1) is smaller than that of the radial oil hole far from the oil receiving ring (1).

4. An oil pickup ring according to claim 1 wherein, The end of the spray pipe (2) far from the oil receiving ring (1) is open.

5. An oil pickup ring according to claim 1 wherein, The end of the spray pipe (2) far from the oil receiving ring (1) is closed.

6. A planetary gear lubrication system characterized by, The application further discloses a planet gear train and the oil receiving spray ring. The planet gear train comprises a sun gear (19), a planet gear (18) and an outer gear ring (16) which are sequentially meshed in a housing (17). The sun gear (19) is fixedly arranged on an input shaft. The planet gear (18) is rotatably arranged in a planet carrier assembly. The gear ring of the planet gear (18) is exposed outside the planet carrier assembly. The planet gear (18) drives a output shaft (11) to rotate through the planet carrier assembly. The planet carrier assembly is rotatably connected with the housing (17) through a planet carrier support bearing (13). An oil receiving spray ring (14) is inserted on the side wall of the planet carrier assembly close to the output shaft (11). The spray pipe (2) and the planet gear (18) are alternately arranged. The lip (104) is attached to the outer wall of the adjacent planet carrier assembly. The planet carrier support bearing (13) is located in the area enclosed by the lip (104). The output shaft (11) is provided with an axial oil hole and a radial oil hole at the position close to the planet carrier support bearing (13).

7. A planetary gear lubrication system according to claim 6, wherein, The input shaft is provided with an axial oil hole and a radial oil hole at the position close to the planet carrier support bearing (13). The axial oil hole in the input shaft is communicated with the axial oil hole in the output shaft (11) through an oil pipe. The planet carrier assembly is provided with an oil receiving spray ring (14) on the side wall close to the input shaft.

8. A planetary gear lubrication system according to claim 7, wherein, The planet gear (18) is fixedly connected with the planet carrier assembly through a hollow axle. A bearing is arranged between the planet gear (18) and the axle. The side wall of the axle is provided with an oil discharge hole. The axle is inserted with a spray pipe (2). The axle receives the lubricating oil of the planet carrier support bearing (13) of the input shaft through the oil receiving ring (1).

9. A planetary gear lubrication system according to claim 7, wherein, The oil pipe is in clearance fit with the input shaft and in interference fit with the output shaft (11).

10. A planetary gear lubrication system according to claim 6 wherein, The planet carrier assembly is provided with a connecting hole on the side close to the output shaft (11), and the inner wall of the connecting hole is provided with a gear slot matched with the output shaft (11).

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