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CN-121977025-A - Lubrication-controllable wet clutch

CN121977025ACN 121977025 ACN121977025 ACN 121977025ACN-121977025-A

Abstract

The invention discloses a lubrication-controllable wet clutch which comprises a piston seat and a clutch outer hub which are connected, wherein a first piston is movably arranged in the piston seat, a piston cavity with an open rear end and a first mounting cavity are formed in the first piston, the front end face of the first piston is enclosed with the inner wall of the piston seat to form a clutch oil cavity, the clutch outer hub is coaxially sleeved with the clutch inner hub, a second mounting cavity is formed between the inner wall of the clutch inner hub and the inner wall of the piston seat, a first reset spring is arranged in the second mounting cavity, a second piston is movably sleeved in the piston seat, the front end of the second piston stretches into the piston cavity, the second piston is enclosed with the piston seat to form a first hydraulic oil channel, the piston seat is provided with a second hydraulic oil channel and a third hydraulic oil channel which extend along the axial direction of the second piston, the second hydraulic oil channel can be respectively communicated with the clutch oil cavity and the piston cavity, and the third hydraulic oil channel can be communicated with the second mounting cavity through the first hydraulic oil channel. The invention realizes the time sequence lubrication control of the wet clutch through a double-piston linkage structure and a design of multiple oil holes and multiple oil paths.

Inventors

  • ZHU JIAXING
  • ZHAO WEIWEI
  • MA XINGYU
  • Nie xingfu
  • WANG KAIFENG
  • FENG HAOCHENG
  • ZHANG QISHUAI
  • TAI GERUN

Assignees

  • 陕西法士特汽车传动集团有限责任公司

Dates

Publication Date
20260505
Application Date
20260205

Claims (9)

  1. 1. The wet clutch with controllable lubrication comprises a piston seat (1) and a clutch outer hub (2) which are connected, and is characterized in that a first piston (3) is arranged in the piston seat (1), the piston seat (1) and the first piston (3) are enclosed to form a clutch oil cavity, a piston cavity (301) with an open rear end and a first mounting cavity (302) are arranged in the first piston (3), and the front end surface of the first piston (3) and the inner wall of the piston seat (1) are enclosed to form a clutch oil cavity; A clutch inner hub (4) is coaxially sleeved in the clutch outer hub (2), a second mounting cavity is arranged between the clutch inner hub (4) and the piston seat (1), and a first reset spring (5) is arranged in the second mounting cavity; A second piston (6) is movably arranged in the second mounting cavity, the front end of the second piston (6) extends into the piston cavity (301), and the second piston (6) and the piston seat (1) are enclosed to form a first hydraulic oil channel (7); The piston seat (1) is provided with a second hydraulic oil channel (8) and a third hydraulic oil channel (9) which extend along the axial direction of the piston seat, the second hydraulic oil channel (8) can be respectively communicated with the clutch oil cavity and the piston cavity (301), and the third hydraulic oil channel (9) can be communicated with the second installation cavity through the first hydraulic oil channel (7).
  2. 2. The lubrication controllable wet clutch according to claim 1, wherein the first piston (3) comprises a first piston body (303), a first connecting portion (304), a second connecting portion (305) and a third connecting portion (306) are connected to the rear end of the first piston body (303), the first connecting portion (304) and the second connecting portion (305) enclose to form the piston cavity (301), and the first piston body (303), the second connecting portion (305) and the third connecting portion (306) enclose to form the first mounting cavity (302).
  3. 3. The lubrication-controllable wet clutch according to claim 2, wherein a first oil passing hole (3031) communicated with the piston cavity (301) is formed in the first piston body (303) in a penetrating manner, a one-way throttle (10) is arranged in the first oil passing hole (3031) in a penetrating manner, a second oil passing hole (3051) is formed in the second connecting portion (305) in a penetrating manner, and the piston cavity (301) is communicated with the first mounting cavity (302) through the second oil passing hole (3051).
  4. 4. The lubrication-controllable wet clutch according to claim 1, wherein a third oil passing hole (101) is further provided in the piston seat (1), and the third hydraulic oil passage (9) is capable of being connected to the first hydraulic oil passage (7) through the third oil passing hole (101).
  5. 5. The lubrication-controllable wet clutch according to claim 1, wherein the second piston (6) comprises a first connecting section (601), a second connecting section (602) and a third connecting section (603) which are sequentially connected from back to front, a first limiting step is formed at the joint of the first connecting section (601) and the second connecting section (602), a second limiting step is formed at the joint of the second connecting section (602) and the third connecting section (603), the third connecting section (603) can seal a first oil passing hole (3031), a first hydraulic oil channel (7) is arranged between the first connecting section (601) and the piston seat (1), and a fourth oil passing hole (6011) capable of communicating the first hydraulic oil channel (7) and the second installation cavity is further formed in the first connecting section (601) in a penetrating mode.
  6. 6. The lubrication-controllable wet clutch according to claim 2, wherein the side wall of the first piston body (303) close to the clutch outer hub (2) is inwards concave to form a first groove, a first sealing ring (11) is embedded in the first groove, the side wall of the first piston body (303) far away from the clutch outer hub (2) is inwards concave to form a second groove, and a second sealing ring (12) is embedded in the second groove; The side wall, close to the second connecting portion (305), of the second piston (6) is inwards concave to form a third groove, a third sealing ring (13) is embedded in the third groove, the side wall, far away from the second connecting portion (305), of the second piston (6) is inwards concave to form a fourth groove, and a fourth sealing ring (14) is embedded in the third groove.
  7. 7. The lubrication controllable wet clutch according to claim 5, further comprising a first spring seat (15) and a second spring seat (16) disposed between the piston seat (1) and the clutch inner hub (4), wherein the first spring seat (15) comprises a first supporting section (1501) and a first mounting section (1502) which are integrally connected, the first supporting section (1501) is connected with the piston seat (1), the second spring seat (16) comprises a second supporting section (1601) and a second mounting section (1602) which are vertically disposed, the second supporting section (1601) is connected with the second connecting section (602), the second mounting section (1602) is connected with the second connecting portion (305), and the second mounting section (1602) is capable of limiting the forward and backward movement of the third connecting section (603); The first return spring (5) is arranged between the first mounting section (1502) and the second mounting section (1602), and two ends of the first return spring (5) are respectively propped against the first mounting section (1502) and the second mounting section (1602).
  8. 8. The lubrication-controllable wet clutch according to claim 7, wherein a second return spring (17) is arranged between the first support section (1501) and the first limiting step, and two ends of the second return spring (17) are respectively abutted with the first support section (1501) and the first limiting step.
  9. 9. A wet clutch with controllable lubrication according to claim 1, characterized in that the side wall of the clutch inner hub (4) facing the clutch outer hub (2) is provided with a plurality of dual plates (18), the side wall of the clutch outer hub (2) facing the clutch inner hub (4) is provided with a plurality of friction plates (19), and the friction plates (19) and the dual plates (18) are alternately distributed.

Description

Lubrication-controllable wet clutch Technical Field The invention belongs to the technical field of wet clutches, and particularly relates to a lubrication-controllable wet clutch. Background The wet clutch is a clutch with friction pair working in lubricating oil liquid, and is a common gear shifting executing element in various road vehicles, engineering machinery, farm machinery and special equipment transmission systems. The transmission system combines a plurality of groups of wet clutches, gears and other elements, realizes the transmission, switching or interruption of a power source by controlling the combination and separation of friction pairs of the wet clutches, obtains a set power transmission route, and realizes the requirements of equipment or vehicle power on no interruption of gear shifting, neutral gear or parking gear according to requirements. The friction pair of the wet clutch can generate more heat in the combining process, the generated heat needs to be taken away by cooling lubricating oil liquid in time, otherwise, the friction pair is invalid due to accumulation of heat, and serious consequences are caused. The existing wet clutch basically realizes heat dissipation by means of fixed cooling and lubricating flow, and the heat of the wet clutch can be taken away in the mode, but the wet clutch is not switched for a long time, so that the cooling and lubricating oil is wasted, the efficiency of a transmission device is affected, and particularly, when the supply flow of a hydraulic source is high (such as an AT or DCT (discrete cosine transform) in the running of an expressway, an internal oil pump is in a high-speed state, the total supply flow is high, but no wet clutch is switched), too much oil is wasted; by adding the lubrication switching structure in the cooling and lubrication oil path, the clutch lubrication oil path is only in a state of being always opened during working, and a larger flow is given to the clutch, so that the clutch is cooled and lubricated relatively more effectively. However, there is still a problem in this treatment method that the cooling lubricating oil is wasted due to long-term engagement of the wet clutch, and improvement is desired. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a wet clutch with controllable lubrication so as to solve the problem that the cooling and lubrication flow of the wet clutch in the prior art cannot be controlled in the use process. In order to solve the technical problems, the invention adopts the following technical scheme: The wet clutch with controllable lubrication comprises a piston seat and a clutch outer hub which are connected, wherein a first piston is movably arranged in the piston seat, a first piston is arranged in the piston seat, and the piston seat and the first piston are enclosed to form a clutch oil cavity; The clutch outer hub is coaxially sleeved with a clutch inner hub, a second mounting cavity is arranged between the clutch inner hub and the piston seat, and a first reset spring is arranged in the second mounting cavity; the front end of the second piston extends into the piston cavity, and the second piston and the piston seat are enclosed to form a first hydraulic oil channel; The piston seat is provided with a second hydraulic oil channel and a third hydraulic oil channel which extend along the axial direction of the piston seat, the second hydraulic oil channel can be respectively communicated with the clutch oil cavity and the piston cavity, and the third hydraulic oil channel can be communicated with the second installation cavity through the first hydraulic oil channel. The invention also has the following technical characteristics: Specifically, the first piston comprises a first piston body, a first connecting part, a second connecting part and a third connecting part are connected to the rear end of the first piston body, the first connecting part and the second connecting part are enclosed to form a piston cavity, and the first piston body, the second connecting part and the third connecting part are enclosed to form a first installation cavity. Furthermore, a first oil passing hole communicated with the piston cavity is formed in the first piston body in a penetrating manner, a one-way restrictor is arranged in the first oil passing hole in a penetrating manner, a second oil passing hole is formed in the second connecting portion in a penetrating manner, and the piston cavity is communicated with the first mounting cavity through the second oil passing hole. Furthermore, a third oil passing hole is further formed in the piston seat, and the third hydraulic oil channel can be connected with the first hydraulic oil channel through the third oil passing hole. The second piston comprises a first connecting section, a second connecting section and a third connecting section which are sequentially connected from back to front, a first limiting s