A clutch assembly and a gearbox with a multi-functional lubricating oil circuit

Abstract

The present invention relates to the technical field of transmission devices, and particularly to a clutch assembly and a gearbox with a multi-functional lubricating oil path. The clutch assembly includes a rotating shaft, and a lubricating oil passage penetrating through the rotating shaft itself is axially formed on the rotating shaft along the axial direction of the rotating shaft, and the lubricating oil passage is coaxially arranged with the rotating shaft; an output gear, the output gear is rotatably arranged on the rotating shaft; a sun gear, the sun gear is fixedly arranged on the rotating shaft; a clutch assembly, the clutch assembly is sleeved on the rotating shaft and can combine or separate the output gear from the rotating shaft; a lubricating shaft tube, the lubricating shaft tube is sleeved on the clutch assembly and is communicated with the lubricating oil passage. The present invention can reduce the difficulty of opening the oil passage, reduce the number of opened oil passages, reduce the difficulty of machining, and at the same time ensure the smoothness of gear shifting.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and particularly to a clutch assembly and a gearbox with a multi-functional lubricating oil circuit. Background Art

[0002] The clutch assembly of a current gearbox is composed of a rotating shaft, a sun gear, a clutch, an output gear, etc. The sun gear, the clutch, and the output gear are arranged on the rotating shaft. The clutch is located between the sun gear and the output gear. The clutch assembly is located in a hollow cavity formed by a box body and an end cover.

[0003] The shifting hydraulic oil circuit and the lubricating oil circuit of the clutch assembly have different sources. The hydraulic oil of the shifting oil circuit enters the rotating shaft through the oil passage on the end cover, thereby pushing the piston to move axially to realize the fitting of the friction plate and the steel plate of the clutch. The lubricating oil of the lubricating oil circuit comes from the box body. By opening a lubricating oil passage on the box body, the lubricating oil enters through the lubricating oil passage and the hollow rotating shaft to realize the lubrication of the gears and the friction plates. The existing method requires more oil passages to be opened, and it is more difficult to machine the lubricating oil passage on the box body, and the machining is complex.

[0004] Therefore, a clutch assembly and a gearbox with a multi-functional lubricating oil circuit are needed to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a clutch assembly and a gearbox with a multi-functional lubricating oil circuit, which can reduce the difficulty of opening oil passages, reduce the number of oil passages opened, and reduce the machining difficulty.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A clutch assembly with a multi-functional lubricating oil circuit, comprising:

[0008] A rotating shaft, along the axial direction of the rotating shaft, a lubricating oil passage penetrating through itself is opened on the rotating shaft, and the lubricating oil passage is coaxially arranged with the rotating shaft;

[0009] An output gear, the output gear is rotatably arranged on the rotating shaft;

[0010] A sun gear, the sun gear is fixedly arranged on the rotating shaft;

[0011] A clutch assembly, the clutch assembly is fixedly penetrated through the rotating shaft and can combine or separate the output gear from the rotating shaft;

[0012] A lubricating shaft tube is arranged on the clutch assembly in a penetrating manner and is communicated with the lubricating oil passage. There is a gap between the lubricating shaft tube and the clutch assembly. Lubricating oil can enter the lubricating oil passage through the lubricating shaft tube to lubricate the output gear and the clutch assembly, and hydraulic oil can enter through the gap to drive the clutch assembly to work.

[0013] Further, the clutch assembly includes a housing, steel sheets, friction plates and a piston. The housing is fixedly arranged on the rotating shaft. The lubricating shaft tube is arranged on the housing in a penetrating manner. The piston is arranged on the housing. The friction plates are in contact with the piston. The steel sheets are connected to the output gear. Hydraulic oil can push the piston to make the friction plates and the steel sheets combine.

[0014] Further, the clutch assembly further includes a reset elastic member. The reset elastic member is fixedly arranged on the housing, is in contact with the piston, and is located on the side of the piston facing the friction plates.

[0015] Further, a joint tube is further included. The joint tube is arranged coaxially with the lubricating shaft tube, and one end is sleeved on the lubricating shaft tube and the housing.

[0016] Further, a first oil passage communicated with the lubricating oil passage is opened on the rotating shaft. Lubricating oil can flow through the first oil passage to lubricate the sun gear.

[0017] Further, a second oil passage communicated with the lubricating oil passage is opened on the rotating shaft. Lubricating oil can flow through the second oil passage to lubricate the clutch assembly.

[0018] Further, a hydraulic oil passage communicated with the gap is opened on the housing. Hydraulic oil can enter through the hydraulic oil passage to push the piston to move.

[0019] Further, splines are arranged on the lubricating shaft tube along the axial direction of the lubricating shaft tube. Key grooves are opened on the housing and are matched with the splines. The splines are located in the key grooves, and the lubricating shaft tube can slide axially on the housing.

[0020] Further, a first retaining ring and a second retaining ring are arranged on the housing at intervals along the axial direction of the housing. The first retaining ring and the second retaining ring are used to limit the sliding distance of the lubricating shaft tube on the housing.

[0021] A transmission includes a box body, an end cover and a clutch assembly with the above-mentioned multi-functional lubricating oil path. The end cover is arranged on the box body and encloses a hollow cavity with the box body. The clutch assembly is rotatably arranged in the hollow cavity. Lubricating oil and hydraulic oil can enter through the end cover.

[0022] Advantages of the present invention:

[0023] In the clutch assembly with a multi-functional lubricating oil path provided by the present invention, an output gear, a sun gear and a clutch assembly are arranged on a rotating shaft, and a lubricating shaft tube is penetrated through the clutch assembly. The lubricating shaft tube is communicated with a lubricating oil path on the rotating shaft. Lubricating oil enters the lubricating oil path through the lubricating shaft tube to lubricate the output gear and the clutch assembly, and hydraulic oil enters to drive the clutch assembly to work through the gap between the clutch assembly and the lubricating shaft tube. By arranging the lubricating shaft tube, there is no need to open an oil path on the box body, thereby reducing the number of opened oil paths and the difficulty of machining.

[0024] The transmission provided by the present invention includes a box body, an end cover and the clutch assembly with the multi-functional lubricating oil path as above. The end cover is arranged on the box body and encloses a hollow cavity with the box body. The clutch assembly is rotatably arranged in the hollow cavity, and lubricating oil and hydraulic oil can enter through the end cover. Since it is relatively easy to open holes on the end cover, the difficulty of machining is reduced, and the difficulty of opening an oil path on the box body is avoided, thereby reducing the difficulty of opening an oil path and the number of opened oil paths. Description of the drawings

[0025] Figure 1 is a schematic structural diagram of a clutch assembly with a multi-functional lubricating oil path in Embodiment 1 of the present invention;

[0026] Figure 2 is another schematic structural diagram of a clutch assembly with a multi-functional lubricating oil path in Embodiment 1 of the present invention;

[0027] Figure 3 is a schematic structural diagram of a clutch assembly with a multi-functional lubricating oil path in Embodiment 2 of the present invention.

[0028] In the figure:

[0029] 1, rotating shaft; 11, lubricating oil path; 12, first oil path; 13, second oil path; 2, sun gear; 3, clutch assembly; 31, housing; 311, hydraulic oil path; 32, piston; 33, reset elastic member; 4, output gear; 5, end cover; 6, lubricating shaft tube; 7, joint tube. Detailed implementation manners

[0030] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all of them.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0033] Embodiment 1

[0034] During the manufacturing process of the transmission, while ensuring lubrication and the operation of the driving clutch, in order to reduce the difficulty of opening oil channels, reduce the number of opened oil channels, and reduce the difficulty of machining, as Figure 1 - Figure 2 shown, the present invention provides a clutch assembly with a multi-functional lubricating oil path. The clutch assembly includes: a rotating shaft 1, an output gear 4, a sun gear 2, a clutch assembly 3, and a lubricating shaft tube 6.

[0035] Among them, an oil lubrication channel 11 penetrating through itself is axially formed on the rotating shaft 1 along the axial direction of the rotating shaft 1, and the oil lubrication channel 11 is coaxially arranged with the rotating shaft 1; the output gear 4 is rotatably arranged on the rotating shaft 1; the sun gear 2 is fixedly arranged on the rotating shaft 1. Specifically, in this embodiment, the sun gear 2 is integrated on the rotating shaft 1; the clutch assembly 3 is fixedly penetrated through the rotating shaft 1 and can combine or separate the output gear 4 and the rotating shaft 1; the lubricating shaft tube 6 is penetrated through the clutch assembly 3 and is communicated with the oil lubrication channel 11. There is a gap between the lubricating shaft tube 6 and the clutch assembly 3, and lubricating oil can enter the oil lubrication channel 11 through the lubricating shaft tube 6 to lubricate the output gear 4 and the clutch assembly 3, and hydraulic oil can enter through the gap to drive the clutch assembly 3 to work.

[0036] By providing the lubricating shaft tube 6, there is no need to open an oil channel on the box body, thereby reducing the number of opened oil channels and reducing the difficulty of machining.

[0037] Further, the clutch assembly 3 includes a housing 31, steel sheets, friction plates, and a piston 32. The housing 31 is fixedly arranged on the rotating shaft 1. The lubricating shaft tube 6 is passed through the housing 31. The steel sheets, friction plates, and the piston 32 are all sleeved on the rotating shaft 1. The piston 32 is arranged on the housing 31. The friction plates are in contact with the piston 32. The steel sheets are connected to the output gear 4. Hydraulic oil can push the piston 32 to make the friction plates and the steel sheets combine. When the rotating shaft 1 needs to output power, control the hydraulic oil to enter and push the piston 32. The piston 32 deforms under the action of the hydraulic oil and squeezes the friction plates so that the friction plates and the steel sheets combine, thereby transmitting the power of the rotating shaft 1 to the output gear 4 through the clutch assembly 3, and the output gear 4 realizes power output.

[0038] Further, the clutch assembly 3 further includes a reset elastic member 33. The reset elastic member 33 is fixedly arranged on the housing 31, is in contact with the piston 32, and is located on the side of the piston 32 facing the friction plates. Specifically, in this embodiment, the reset elastic member 33 is a disc spring. During the process of the piston 32 deforming under the push of the hydraulic oil, the reset elastic member 33 undergoes elastic deformation. During the process of the clutch assembly 3 disengaging from braking, the reset elastic member 33 drives the piston 32 to reset the piston 32.

[0039] Further, as Figure 2 shown, the clutch assembly further includes a connection pipe 7. The connection pipe 7 is coaxially arranged with the lubricating shaft tube 6, and one end is sleeved on the lubricating shaft tube and the housing 31. The lubricating oil directly enters the lubricating oil passage 11 through the connection pipe 7. At this time, an installation hole for fixing the connection pipe 7 is opened on the end cover 5 of the gearbox. By providing the connection pipe 7, it is convenient for the lubricating oil to enter.

[0040] Further, a first sealing ring is arranged between the lubricating shaft tube 6 and the connection pipe 7. By providing the first sealing ring, it can prevent the lubricating oil from leaking through the gap between the lubricating shaft tube 6 and the connection pipe 7, playing a sealing role and preventing the lubricating oil and the hydraulic oil from mixing.

[0041] Further, a second sealing ring is arranged between the housing 31 and the connection pipe 7. By providing the second sealing ring, it can prevent the lubricating oil from leaking through the gap between the housing 31 and the connection pipe 7, thereby further enhancing the sealing effect. Through the above settings, it can ensure that the lubricating oil smoothly enters the lubricating oil passage 11 and maintain the sealing effect. After the seal fails, only the connection pipe 7 needs to be taken out to replace the new sealing ring, which is convenient for maintenance.

[0042] Further, a first oil passage 12 communicating with the lubricating oil passage 11 is opened on the rotating shaft 1. The lubricating oil can flow through the first oil passage 12 to lubricate the sun gear 2. By opening the first oil passage 12, it is convenient to lubricate the sun gear 2, thereby ensuring the service life of the sun gear 2.

[0043] Further, a second oil passage 13 communicating with the lubricating oil passage 11 is provided on the rotating shaft 1, and the lubricating oil can flow through the second oil passage 13 to lubricate the clutch assembly 3. By providing the second oil passage 13, it is convenient to lubricate the clutch assembly 3 and at the same time discharge the heat generated by the clutch assembly 3, thereby reducing the temperature between the friction plate and the steel plate and ensuring the service life of the clutch assembly 3.

[0044] Further, a hydraulic oil passage 311 communicating with the gap is provided on the housing 31, and the hydraulic oil can enter through the hydraulic oil passage 311 to push the piston 32 to move. Specifically, an oil supply hole communicating with the gap between the lubricating shaft tube 6 and the housing 31 is provided on the end cover 5, and the hydraulic oil enters the gap through the oil supply hole, and then enters through the gap and the hydraulic oil passage 311 to push the piston 32 to make the piston 32 act. By providing the hydraulic oil passage 311, it is convenient for the hydraulic oil to enter.

[0045] Embodiment 2

[0046] As Figure 3 shown, the biggest difference between this embodiment and Embodiment 1 is that in this embodiment, the lubricating shaft tube 6 can slide axially along the housing 31, so as to adjust the pressure of the hydraulic oil pushing the piston 32. The following describes the specific implementation manner.

[0047] In the prior art, when shifting gears, the gear oil passage of the shift valve is opened and the hydraulic oil enters the housing of the clutch. When the shift valve oil passage valve is opened instantaneously, due to the "water hammer effect", the oil pressure increases rapidly instantaneously, forming a pressure pulse, which pushes the piston 32 to move leftward, causing the steel plate and the friction plate to be instantaneously combined without a slip friction process, and the gear is instantaneously engaged. Subsequently, according to the "water hammer effect" principle, the pressure drops rapidly, and the steel plate and the friction plate are in slip friction, and the shift valve is manipulated to control the pressure to gradually rise until the steel plate and the friction plate are completely engaged again. Therefore, during the entire shifting process, there is a large pulse in the oil pressure, resulting in a shifting shock.

[0048] To solve the above problems, further, splines are provided on the lubricating shaft tube 6 along the axial direction of the lubricating shaft tube 6, and key grooves mating with the splines are provided on the housing 31. The splines are located in the key grooves, and the lubricating shaft tube 6 can slide axially on the housing 31. When the shift valve oil passage valve is opened instantaneously, due to the "water hammer effect", the oil pressure increases rapidly instantaneously, forming a pressure pulse, which can push the lubricating shaft tube 6 to move rightward, increasing the volume of the hydraulic oil passage 311, thereby weakening the pressure of the hydraulic oil, so that the pressure is not sufficient to push the piston 32 to move leftward to push the friction plate and the steel plate to be combined, that is, the pressure pulse is weakened and the clutch cannot be engaged to shift gears, thereby reducing the shock caused by the pressure pulse during the shifting process and ensuring the smoothness of shifting.

[0049] Further, a first retaining ring and a second retaining ring are arranged on the housing 31 at intervals along the axial direction of the housing 31. The first retaining ring and the second retaining ring are used to limit the sliding distance of the lubricating shaft tube 6 on the housing 31. By setting the first retaining ring and the second retaining ring to limit the movement distance of the lubricating shaft tube 6, it can ensure that while avoiding the impact caused by pressure pulses, the pressure of the hydraulic oil does not drop too fast, resulting in insufficient pressure for the friction plates and steel sheets of the clutch to engage.

[0050] When the gear is disengaged, the gear oil passage of the shift valve is closed, and the hydraulic oil in the gear oil passage flows back. Since the lubricating oil is low-pressure oil and has a certain pressure itself, the lubricating oil enters the right end of the lubricating shaft tube 6 through the lubricating oil passage 11. The pressure of the lubricating oil pushes the lubricating shaft tube 6 to move to the left and is positioned by the second retaining ring, that is, the lubricating shaft tube 6 is reset to the initial position, completing the gear shift and gear disengagement.

[0051] This embodiment also provides a gearbox, which includes a box body, an end cover 5 and a clutch assembly with the above-mentioned multi-functional lubricating oil circuit. The end cover 5 is arranged on the box body and encloses a hollow cavity with the box body. The clutch assembly is rotatably arranged in the hollow cavity, and the lubricating oil and hydraulic oil can enter through the end cover 5. Since it is easier to open holes on the end cover 5, the machining difficulty is reduced, and the oil passage is not opened on the box body, thereby reducing the difficulty of opening the oil passage and the number of oil passages opened.

[0052] Further, sealing rings are arranged between the inner and outer circles of the lubricating shaft tube 6 and the end cover 5, the housing 31 and the end cover 5, and the housing 31 and the piston 32. Through the above settings, a sealed oil cavity for the hydraulic oil is formed by sealing. This separates the hydraulic oil and the lubricating oil, preventing oil leakage and ensuring the smooth completion of gear shifting.

[0053] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A clutch assembly with a multi-functional lubricating oil circuit, characterized in that, Comprising: A rotating shaft (1), along the axial direction of the rotating shaft (1), a lubricating oil passage (11) penetrating through itself is provided on the rotating shaft (1), and the lubricating oil passage (11) is coaxially arranged with the rotating shaft (1); An output gear (4), the output gear (4) is rotatably arranged on the rotating shaft (1); A sun gear (2), the sun gear (2) is fixedly arranged on the rotating shaft (1); A clutch assembly (3), the clutch assembly (3) is fixedly sleeved on the rotating shaft (1), and can combine or separate the output gear (4) and the rotating shaft (1); A lubricating shaft tube (6), the lubricating shaft tube (6) is sleeved on the clutch assembly (3), and is communicated with the lubricating oil passage (11). There is a gap between the lubricating shaft tube (6) and the clutch assembly (3). Lubricating oil can enter the lubricating oil passage (11) through the lubricating shaft tube (6) to lubricate the output gear (4) and the clutch assembly (3), and hydraulic oil can enter through the gap to push the clutch assembly (3) to work; The clutch assembly (3) includes a housing (31), steel sheets, friction plates and a piston (32). The housing (31) is fixedly arranged on the rotating shaft (1), the lubricating shaft tube (6) is sleeved on the housing (31), the piston (32) is arranged on the housing (31), the friction plate abuts against the piston (32), the steel sheet is connected to the output gear (4), and hydraulic oil can push the piston (32) to make the friction plate and the steel sheet combine; Axially along the lubricating shaft tube (6), splines are provided on the lubricating shaft tube (6). A key groove matching with the splines is provided on the housing (31), the splines are located in the key groove, and the lubricating shaft tube (6) can slide axially on the housing (31).

2. The clutch assembly of a multi-functional lubricating oil circuit according to claim 1, characterized in that, The clutch assembly (3) further includes a reset elastic member (33), the reset elastic member (33) is fixedly arranged on the housing (31), abuts against the piston (32), and is located on the side of the piston (32) facing the friction plate.

3. The clutch assembly of a multi-functional lubricating oil circuit according to claim 1, wherein, It further includes a joint pipe (7), the joint pipe (7) is coaxially arranged with the lubricating shaft tube (6), and one end is sleeved on the lubricating shaft tube (6) and the housing (31).

4. The clutch assembly of a multi-functional lubricating oil circuit according to claim 1, characterized in that, A first oil passage (12) communicated with the lubricating oil passage (11) is provided on the rotating shaft (1), and lubricating oil can flow through the first oil passage (12) to lubricate the sun gear (2).

5. The clutch assembly of a multi-functional lubricating oil circuit according to claim 1, characterized in that A second oil passage (13) communicated with the lubricating oil passage (11) is provided on the rotating shaft (1), and lubricating oil can flow through the second oil passage (13) to lubricate the clutch assembly (3).

6. The clutch assembly of a multi-functional lubricating oil circuit according to claim 1, characterized in that, A hydraulic oil passage (311) communicated with the gap is provided on the housing (31), and hydraulic oil can enter through the hydraulic oil passage (311) to push the piston (32) to move.

7. The clutch assembly of a multi-functional lubricating oil path according to claim 1, characterized in that, A first retaining ring and a second retaining ring are arranged on the housing (31) at intervals along the axial direction of the housing (31), and the first retaining ring and the second retaining ring are used to define the sliding distance of the lubricating shaft tube (6) on the housing (31).

8. A gearbox, characterized in that, It includes a box body, an end cover (5) and a clutch assembly with a multi-functional lubricating oil circuit as described in any one of claims 1-7. The end cover (5) is arranged on the box body and encloses a hollow cavity with the box body. The clutch assembly is rotatably arranged in the hollow cavity, and lubricating oil and hydraulic oil can enter through the end cover (5).

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