A hydraulic transmission planetary gear lubrication structure, planetary gear and hydraulic transmission

Abstract

The present invention relates to the field of transmission lubrication technology, and in particular to a hydraulic transmission planetary gear lubrication structure, a planetary gear, and a hydraulic transmission, comprising an oil guide ring, a first oil passage disposed within a main shaft, a second oil passage disposed within a first planetary shaft, and a third oil passage disposed within a second planetary shaft; the oil guide ring is disposed on the main shaft between a first sun gear and a second sun gear, and an oil guide cavity is disposed within the oil guide ring; the first oil passage, the second oil passage, and the third oil passage are all interconnected with the oil passage cavity. This structure allows lubricating oil to flow continuously, accurately, and efficiently through the oil guide ring to different planetary gears, thereby accurately, efficiently, and fully lubricating the bearings of different planetary gears. This solves the problem in the prior art of planetary gear bearings being overheated, failing, and having a short service life due to untimely and insufficient lubrication.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission lubrication, and in particular to a hydraulic transmission planetary gear lubrication structure, a planetary gear and a hydraulic transmission. Background Art

[0002] A hydraulic automatic transmission is a transmission device composed of a torque converter and a planetary gear transmission. It has always been favored by consumers because of its good handling stability, comfort, smoothness and reliability. It includes a planetary gear, clutch and brake.

[0003] The planetary gear set is the power transmission unit of the planetary transmission mechanism and a crucial component of the transmission mechanism. It primarily transmits speed and torque, requiring high strength. It includes basic components such as the ring gear, sun gear, and planet carrier, as well as the planetary gears. When the torque and speed transmitted by the planetary gear set are high, the high-speed rotation of the planetary gear bearings will generate a large amount of heat, necessitating forced lubrication. If the bearings are not lubricated promptly and adequately, the heat generated by the rotation cannot be dissipated in time, causing the bearings to overheat and fail. This reduces the service life of the hydraulic automatic transmission, increases maintenance costs, and can even cause accidents. Summary of the Invention

[0004] In view of the problem in the prior art that planetary gear bearings are not lubricated in a timely and sufficient manner, resulting in bearing overheating, failure and short service life, the present invention provides a hydraulic transmission planetary gear lubrication structure, a planetary gear and a hydraulic transmission with high-efficiency lubrication capabilities.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a hydraulic transmission planetary gear lubrication structure, comprising an oil guide ring, a first oil passage, a second oil passage and a third oil passage; the oil guide ring is arranged on the main shaft between the first sun gear and the second sun gear, and an oil passage cavity is provided inside the oil guide ring; the first oil passage is arranged inside the main shaft; the second oil passage is arranged inside the first planetary shaft and communicates with the first planetary gear; the third oil passage is arranged inside the second planetary shaft and communicates with the second planetary gear; the first oil passage, the second oil passage and the third oil passage are all interconnected with the oil passage cavity.

[0007] Preferably, it further comprises a fourth oil passage arranged inside the first sun gear and leading to the thrust bearing, wherein the fourth oil passage is communicated with the oil chamber.

[0008] Preferably, the first oil passage is arranged along the axial direction of the main shaft and communicates with the oil guide ring through a first oil hole. The first oil hole is opened along the radial direction of the main shaft and is perpendicular to the first oil passage.

[0009] Preferably, the second oil passage is arranged axially along the first planetary shaft, and is connected to the oil chamber through the second oil hole, and leads to the first planetary gear through the third oil hole; the second oil hole and the third oil hole are both arranged radially along the first planetary shaft and perpendicular to the second oil passage.

[0010] Preferably, the third oil passage is arranged axially along the second planetary shaft, and is connected to the oil chamber through the fourth oil hole, and leads to the second planetary gear through the fifth oil hole; the fourth oil hole and the fifth oil hole are both arranged radially along the second planetary shaft and perpendicular to the third oil passage.

[0011] Preferably, a first blocking device is provided at the end of the second oil passage for blocking the second oil passage; and a second blocking device is provided at the end of the third oil passage for blocking the third oil passage.

[0012] Preferably, the oil guide ring has a plurality of oil guide holes distributed along the circumference for guiding the lubricating oil inside the oil guide ring.

[0013] Preferably, the curvature of the oil guide hole is greater than 0 and less than π / 2.

[0014] A planetary gearbox of a hydraulic transmission comprises the above-mentioned lubrication structure.

[0015] A hydraulic transmission comprises the above-mentioned planetary gear set.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a lubricating structure for a planetary gear train of a hydraulic transmission. The structure includes an oil guide ring, a first oil passage disposed within a main shaft, a second oil passage disposed within a first planetary shaft, and a third oil passage disposed within a second planetary shaft. The oil passage cavity provided on the oil guide ring allows the first, second, and third oil passages to be interconnected. This allows lubricating oil to flow continuously, accurately, and efficiently through the oil guide ring and the first, second, and third oil passages to flow to different planetary gear trains simultaneously, achieving precise, efficient, and sufficient lubrication of the bearings of the different planetary gear trains. This removes heat generated by rotation, thereby preventing bearing failure due to overheating, which can reduce the service life of the hydraulic automatic transmission, increase maintenance costs, and even cause accidents.

[0018] Furthermore, the provision of the fourth oil passage enables continuous and uninterrupted lubrication of the thrust bearing at the end of the first sun gear, further improving the lubrication effect of the entire mechanism and increasing the versatility of the lubrication mechanism.

[0019] Furthermore, the perpendicular arrangement of the first oil hole and the first oil passage ensures sufficient lubricating oil enters the oil guide ring while maximizing shaft strength, ensuring that any reduction in component strength caused by the oil hole design does not affect the function of the main shaft. Furthermore, the vertical structure reduces component processing difficulty and improves processing quality.

[0020] Furthermore, the vertical arrangement of the second oil hole and the fourth oil hole and the second oil channel not only ensures the strength of the first planetary shaft, but also ensures sufficient lubrication of the bearings entering between the first planetary wheel and the first planetary shaft, and reduces the difficulty of workpiece processing.

[0021] Furthermore, the fourth oil hole and the fifth oil hole are arranged perpendicular to the third inherent channel. In addition to maximizing the strength of the second planetary shaft and reducing the processing difficulty, it can also ensure that the lubricating oil fully enters the bearing between the second planetary gear and the second planetary shaft, further ensuring sufficient lubrication of the bearing and avoiding overheating failure of the planetary bearing.

[0022] Furthermore, the arrangement of the first and second sealing devices, in addition to ensuring the sealing of the first and second oil passages to prevent the lubricating oil from being dispersed and leaked, can also play a dust-proof role, preventing impurities from entering the interior of the planetary gear through the first and second oil passages, causing wear and failure.

[0023] Furthermore, the circumferential oil holes of the oil guide ring and the setting of the curvature of the oil holes can ensure that the lubricating oil is guided out of each planetary gear under the action of centrifugal force, thereby achieving the purpose of continuous and precise oil circulation.

[0024] The present invention provides a planetary gear comprising the above-mentioned lubrication structure, which can achieve sufficient and continuous lubrication of the bearings during operation, thereby avoiding failure of the bearings due to overheating and extending the service life.

[0025] The present invention also provides a hydraulic transmission including the above-mentioned planetary gear, which has an excellent self-lubricating structure, can achieve effective and sufficient self-lubrication of the planetary gear bearings, has a long service life, low maintenance cost and good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the lubrication structure of the planetary gearbox of the hydraulic transmission of the present invention.

[0027] Figure 2 This is a lubricating oil circuit diagram of the hydraulic transmission planetary gear lubrication structure of the present invention.

[0028] Figure 3 This is a schematic structural diagram of the first sun gear of the present invention.

[0029] Figure 4 Schematic diagram of the oil guide ring structure of the present invention, wherein a is an axial view of the oil guide ring, and b is an axial view of the oil guide ring in another direction corresponding to a.

[0030] Figure 5 This is a schematic diagram of the oil guide ring installation structure of the present invention.

[0031] Among them, 1-first planetary carrier, 2-first sealing device, 3-second sealing device, 4-second planetary carrier, 5-first sun gear, 6-oil guide ring, 7-first planetary gear, 8-first planetary shaft, 9-annular circular wall structure, 10-second sun gear, 11-second planetary gear, 12-second planetary shaft, 13-main shaft, 14-first mounting hole, 15-thrust bearing, 16-second mounting hole, a-first oil passage, b-oil chamber, c-second oil passage, d-third oil passage, a1-first oil hole, c1-second oil hole, c2-third oil hole, d1-fourth oil hole, d2-fifth oil hole, e-fourth oil passage, f-sixth oil hole, g-oil guide hole. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain the present invention rather than to limit it.

[0039] The present invention discloses a hydraulic transmission planetary gear lubrication structure, referring to Figure 1, including an oil guide ring 6, a first oil passage a, a second oil passage c and a third oil passage d; the oil guide ring 6 is arranged on the main shaft 13 between the first sun gear 5 and the second sun gear 10, and an oil passage chamber b is provided inside the oil guide ring 6, and the oil guide ring 6 has no relative movement with the first sun gear 5, the second sun gear 6 and the main shaft 13; the end of the second oil passage c is provided with a first blocking device 2 for blocking the second oil passage c; the end of the third oil passage d is provided with a second blocking device 3 for blocking the third oil passage d; the first oil passage a is provided inside the main shaft 13, along the axial direction of the main shaft 13, and communicates with the oil guide ring b through the first oil hole a1, and the first oil hole a1 is opened radially along the main shaft 13 And it is perpendicular to the first oil passage a; the second oil passage c is arranged inside the first planetary shaft 8, and is arranged axially along the first planetary shaft 8, and is communicated with the oil passage chamber b through the second oil hole c1, and is led to the first planetary gear 7 through the third oil hole c2. The second oil hole c1 and the third oil hole c2 are both arranged radially along the first planetary shaft 8 and perpendicular to the second oil passage c; the third oil passage d is arranged inside the second planetary shaft 12, and is arranged axially along the second planetary shaft 12, is communicated with the oil passage chamber b through the fourth oil hole d1, and is led to the second planetary gear 11 through the fifth oil hole d2. The fourth oil hole d1 and the fifth oil hole d2 are both arranged radially along the second planetary shaft 12, and are communicated with the second planetary gear 11 perpendicular to the third oil passage d.

[0040] Preferably, the lubrication structure further includes a fourth oil passage e disposed within the first sun gear 5 and leading to the thrust bearing 15. The fourth oil passage e communicates with the oil chamber b. The oil guide ring 6 has a plurality of oil guide holes g distributed circumferentially for draining lubricating oil from the oil guide ring 6. The curvature of the oil guide holes g is greater than 0 and less than π / 2.

[0041] See also Figure 2 During oil-filled lubrication, the lubricating oil from the hydraulic system enters the interior of the main shaft 13 through the first oil passage a, and enters the oil guide ring 6 through the first oil hole a1, and under the action of the centrifugal force of the oil guide hole g and the oil guide ring 6, passes through the fourth oil passage e to reach the thrust bearing 15 to lubricate the thrust bearing 15, passes through the oil guide hole g, the oil cavity b and the second oil hole c1 on the oil guide ring 6 to enter the second oil passage c, and passes through the third oil hole c2 to reach the bearing between the first planetary gear 7 and the first planetary shaft 8 to lubricate it, passes through the oil guide hole g, the oil cavity b and the fourth oil hole d1 on the oil guide ring 6 to enter the third oil passage d, and passes through the fifth oil hole d2 to reach the bearing between the second planetary gear 11 and the second planetary shaft 12 to lubricate it.

[0042] The present invention provides a hydraulic transmission planetary gear, which includes the above-mentioned lubrication structure. Figures 3 to 5 Preferably, the inner diameter of the first sun gear 5 of the planetary gear is extended to be provided with an annular circular wall structure 9, and the outer wall of the annular circular wall structure 9 just matches the inner wall of the oil guide ring 6; the annular circular wall structure 9 is also provided with a sixth oil hole f at the position corresponding to the oil guide hole g; preferably, the annular circular wall structure 9 is also provided with a first mounting hole 14, and the oil guide ring 6 is provided with a second mounting hole 16, the first mounting hole 14 corresponds to the second mounting hole 16, and is connected with a matching pin. The first sun gear 5, the oil guide ring 6, the second sun gear 10 and the main shaft 13 of the present invention adopt a split design for combined assembly, which can avoid the processing difficulties of the integrated design. The design of the annular circular wall structure 9 can form an annular cavity on its inner wall to prevent the dispersion and leakage of lubricating oil coming from the main shaft 13, and on the other hand, its outer wall can form a matching relationship with the oil guide ring 6 to provide a radial support for the oil guide ring 6. A first oil guide groove is formed on the inner wall of the first planetary carrier 1 and is connected to the second oil hole c1 ; a second oil guide groove is formed on the inner wall of the second planetary carrier 4 and is connected to the fourth oil hole d1 .

[0043] The present invention also provides a hydraulic transmission including the planetary gear set. The transmission has an excellent self-lubricating structure, which can achieve effective and sufficient self-lubrication of the planetary gear set bearings, has a long service life, low maintenance cost, and good economic benefits.

[0044] In summary, the present invention provides a hydraulic transmission planetary gear lubrication structure, a planetary gear, and a hydraulic transmission. Through the arrangement of the oil guide ring 6, the first oil passage a, the second oil passage c, and the third oil passage d, lubricating oil can be continuously, accurately, and efficiently passed through the oil guide ring 6 and the first oil passage a, the second oil passage c, and the third oil passage d, simultaneously flowing to different planetary gears, thereby achieving precise, efficient, and sufficient lubrication of the bearings of different planetary gears. This removes heat generated by rotation, thereby preventing bearing failure due to overheating, which can reduce the service life of the hydraulic automatic transmission, increase maintenance costs, and even cause accidents.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. A hydraulic transmission planetary gear lubrication structure, characterized in that: The invention comprises an oil guide ring (6), a first oil passage (a), a second oil passage (c), a third oil passage (d) and a fourth oil passage (e); the oil guide ring (6) is arranged on the main shaft (13) between the first sun gear (5) and the second sun gear (10), and an oil passage cavity (b) is arranged inside the oil guide ring (6); an annular circular wall structure (9) is extended from the inner diameter of the first sun gear (5), and the outer wall of the annular circular wall structure (9) is matched with the inner wall of the oil guide ring (6); the oil guide ring (6) has a plurality of oil guide holes (g) distributed along the circumference for guiding the oil The lubricating oil inside the ring (6) is discharged; a sixth oil hole (f) is further provided on the annular circular wall structure (9) at a position corresponding to the oil guide hole (g); the first oil passage (a) is arranged inside the main shaft (13); the second oil passage (c) is arranged inside the first planetary shaft (8) and communicates with the first planetary gear (7); the third oil passage (d) is arranged inside the second planetary shaft (12) and communicates with the second planetary gear (11); the first oil passage (a), the second oil passage (c) and the third oil passage (d) are all interconnected with the oil chamber (b). The fourth oil passage (e) is arranged inside the first sun gear (5) and leads to the thrust bearing (15), and the fourth oil passage (e) is in communication with the oil chamber (b).

2. The hydraulic transmission planetary gear lubrication structure according to claim 1, characterized in that: The first oil passage (a) is arranged along the axial direction of the main shaft (13) and communicates with the oil guide ring through the first oil passage hole (a1). The first oil passage hole (a1) is opened radially along the main shaft (13) and is perpendicular to the first oil passage (a).

3. The hydraulic transmission planetary gear lubrication structure according to claim 1, characterized in that: The second oil passage (c) is arranged axially along the first planetary shaft (8), communicates with the oil passage cavity (b) through the second oil passage hole (c1), and leads to the first planetary gear (7) through the third oil passage hole (c2); the second oil passage hole (c1) and the third oil passage hole (c2) are both arranged radially along the first planetary shaft (8) and perpendicular to the second oil passage (c).

4. The hydraulic transmission planetary gear lubrication structure according to claim 1, characterized in that: The third oil passage (d) is arranged axially along the second planetary shaft (12), communicates with the oil passage cavity (b) through the fourth oil passage hole (d1), and leads to the second planetary gear (11) through the fifth oil passage hole (d2); the fourth oil passage hole (d1) and the fifth oil passage hole (d2) are both arranged radially along the second planetary shaft (12) and perpendicular to the third oil passage (d).

5. The hydraulic transmission planetary gear lubrication structure according to claim 1, characterized in that: A first blocking device (2) is provided at the end of the second oil passage (c) for blocking the second oil passage (c); a second blocking device (3) is provided at the end of the third oil passage (d) for blocking the third oil passage (d).

6. The hydraulic transmission planetary gear lubrication structure according to claim 1, characterized in that: The radian of the oil guide hole (g) is greater than 0 and less than π / 2.

7. A planetary gearbox of a hydraulic transmission, characterized in that: The lubricating structure comprises the lubricating structure according to any one of claims 1 to 6.

8. A hydraulic transmission, characterized in that: Including the planetary gear set as claimed in claim 7.

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