CN-122014762-A - Plunger type static pressure clutch

CN122014762ACN 122014762 ACN122014762 ACN 122014762ACN-122014762-A

Abstract

The application provides a plunger type static pressure clutch which comprises a static pressure clutch part, wherein the static pressure clutch part comprises a driving end, a driving end and a driven end with an inner curved surface, a plunger hole and an oil discharge narrow slit are formed in the cavity wall of the driving end, a pressure oil duct is formed in an oil supply shaft in the cavity, the driving end comprises an oil inlet disc, a one-way valve is arranged on the oil inlet disc, a plunger is embedded in the plunger hole, a roller is embedded in the plunger in a rolling manner, an inner cavity is divided into a first cavity and a second cavity by an oil trapping piston, the oil discharge narrow slit is arranged corresponding to the first cavity, the second cavity is communicated with the pressure oil duct, and the oil trapping piston is connected to a cavity by a piston spring. The clutch of the application realizes that the clutch with lighter weight can meet the torque transmission requirement, and simultaneously can actively control the clutch combining process, smoothly increase the combining pressure and avoid severe impact in the clutch combining process.

Inventors

WANG SHAOJIE
SUN BAOQUN
XIA GUANG
LUO LIANG
CHEN ZHONGHUA

Assignees

合肥工业大学

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. The plunger type static pressure clutch is characterized by comprising a static pressure clutch part, wherein the static pressure clutch part comprises a driving end, a driven end and a driving end, and the driving end is arranged on the driving end and is in movable contact with the driven end so as to separate or combine the driving end and the driven end; the driving end comprises a cavity and an oil supply shaft, wherein the cavity comprises an inner cavity for the oil supply shaft to penetrate through and a cavity wall forming the inner cavity, a plunger hole and an oil discharge narrow slit which are mutually communicated are formed in the cavity wall, and a pressure oil duct capable of injecting pressure oil is formed in the oil supply shaft; the driving end comprises: The one-way valve is arranged on the cavity and positioned at the position where the pressure oil duct is communicated with the plunger hole and is used for controlling the on-off of the pressure oil between the pressure oil duct and the plunger hole; The plunger is movably embedded in the plunger hole, a groove is formed in one side, facing the curved surface, of the plunger, and a roller is embedded in the groove in a rolling manner; The oil discharge narrow gap is arranged corresponding to the first chamber, and the second chamber is communicated with the pressure oil duct and is used for driving the oil trapping piston to axially move towards the direction of the first chamber under the action of pressure oil so as to seal the oil discharge narrow gap; And the piston spring is arranged on the cavity and is abutted with the oil trapping piston, and is used for driving the oil trapping piston to axially move towards the direction of the second cavity when the pressure oil is stopped, so that the oil discharging narrow gap is communicated with the first cavity.
2. The plunger type hydrostatic clutch according to claim 1, wherein an exhaust slit communicating the plunger hole and the groove is formed on an inner side of the plunger.
3. The hydrostatic clutch of claim 1, wherein said drive end further comprises a compression spring secured to said cavity wall and abutting said plunger.
4. The plunger type static pressure clutch according to any one of claims 1-3, wherein the cavity comprises an input shaft and a cylinder body, the input shaft is fixedly connected with the cylinder body, the passive end comprises an outer shell and an output shaft which are fixedly connected, the outer shell is sleeved on the periphery of the cavity, and the inner side of the outer shell is formed by uniformly distributing a plurality of sections of curved surfaces to form a closed curved surface.
5. The plunger type static pressure clutch according to claim 4, wherein a plurality of plunger holes and oil discharge narrow slits are arranged, a plurality of plunger holes are arranged at intervals along the circumferential direction of the cylinder body and are correspondingly communicated with a plurality of oil discharge narrow slits, each plunger is correspondingly arranged in each plunger hole, each plunger is correspondingly provided with each roller, and a plurality of rollers are movably contacted with the curved surface; and the positions, communicated with each plunger hole, of the oil inlet disc are provided with one-way valves, and the pressure oil duct is respectively communicated with a plurality of one-way valves through a plurality of oil holes on the oil supply shaft.
6. The plunger type static pressure clutch according to claim 4, further comprising a hydraulic coupling part, wherein the hydraulic coupling part comprises a pump wheel and a turbine which are communicated with each other, the pump wheel is connected to the cylinder body, the turbine is connected with the outer shell, a low-pressure oil channel capable of injecting oil is arranged on the oil supply shaft, and the low-pressure oil channel is communicated with the pump wheel.
7. The plunger type hydrostatic clutch of claim 6, wherein said pump is sleeved in said turbine or said pump and said turbine are disposed axially adjacent.
8. The plunger type hydrostatic clutch according to claim 4, further comprising a coupling portion including an outer gear sleeve slidably coupled to an outer circumference of the cylinder body by a spline, an inner gear sleeve provided to an inner circumference of the outer housing and movably coupled to the outer gear sleeve in an axial direction, and an outer gear sleeve return spring coupled between the outer gear sleeve and a step of the cylinder body; and a tooth sleeve combining cavity is formed between the outer tooth sleeve and the input shaft, and the tooth sleeve combining cavity is communicated with the second cavity.
9. The plunger type hydrostatic clutch of claim 1, wherein said driving end includes an oil inlet disc, said oil inlet disc being interposed between said oil supply shaft and said chamber wall, said one-way valve being disposed on said oil inlet disc.
10. The plunger type hydrostatic clutch of claim 1, wherein said cavity comprises an input shaft and an outer housing, said input shaft and said outer housing being fixedly connected, said passive end comprising fixedly connected cylinders and an output shaft.

Description

Plunger type static pressure clutch Technical Field The application relates to the technical field of mechanical transmission, in particular to a plunger type static pressure clutch. Background In a powertrain system, it is often necessary to use clutch members for controlling the output and interruption of power. The clutch is widely applied to various fields of automobiles, ships, engineering, agricultural machinery and the like. The clutch has input and output, and when the clutch was combined, input and output were linked together, and the power of input was exported from the output, and when the clutch was separated, input and output cut off, and power can't transfer. When one end is connected with a fixed part such as a shell, the brake function is realized. Common clutches include dry or wet friction plate clutches, inclined strut type or roller type overrunning clutches and the like, wherein the dry and wet friction plate clutches are most widely applied in the transmission field, the friction plate clutches comprise one or more groups of friction pairs consisting of steel plates and friction plates, the steel plates and the friction plates are respectively connected with an input end and an output end, and the steel plates and the friction plates can axially move under the pushing of an actuating component so as to realize combination and separation. When the steel sheet is separated from the friction plate, the input shaft is separated from the output shaft, power cannot be transmitted, and when the steel sheet is combined with the friction plate, friction force is generated under the action of combined pressure, and the friction plate has the capacity of transmitting torque. The core function of the inclined strut type or roller type overrunning clutch is to allow power to be transmitted in a single direction and automatically disconnect in the opposite direction, so as to realize overrunning idle running. The friction clutch generally adopts friction pairs such as paper base, copper base, carbon fiber and the like, the transmissible torque increases along with the increase of the bonding pressure, but when the bonding pressure rises to a certain value, the transmission torque reaches the upper limit, the friction material is separated and ablated when the bonding pressure is further increased to increase the transmission torque, and the allowable pressure is generally between 1 and 4MPa, so that when the transmission of larger torque is carried out, the friction pair number and the friction plate diameter are required to be increased, and the friction clutch is often large in volume and weight and is not suitable for transmission occasions with light weight requirements. The overrunning clutch is made of high-strength alloy steel materials because the friction contact pairs are self-locking, transmitting torque depending on friction force and capable of working under very high combination pressure, and has high power density and simple structure, but combination is completed instantly, impact is huge, meanwhile, clutch effect is generally generated passively, clutch control cannot be carried out actively according to requirements, and the overrunning clutch can only be used for occasions needing unidirectional torque transmission. Disclosure of Invention In view of the above problems, an object of the present invention is to provide a plunger type hydrostatic clutch, so as to meet torque transmission requirements by using a lighter clutch, and at the same time, actively control a clutch combining process, smoothly increase a combining pressure, and avoid severe impact during the combining process. In order to achieve the purpose, the invention provides a plunger type static pressure clutch, which adopts the following technical scheme: the plunger type static pressure clutch comprises a static pressure clutch part, wherein the static pressure clutch part comprises a driving end, a driven end and a driving end, and the driving end is arranged on the driving end and is in movable contact with the driven end so as to separate or combine the driving end and the driven end; the driving end comprises a cavity and an oil supply shaft, wherein the cavity comprises an inner cavity for the oil supply shaft to penetrate through and a cavity wall forming the inner cavity, a plunger hole and an oil discharge narrow slit which are mutually communicated are formed in the cavity wall, and a pressure oil duct capable of injecting pressure oil is formed in the oil supply shaft; the driving end comprises: The one-way valve is arranged on the cavity and positioned at the position where the pressure oil duct is communicated with the plunger hole and is used for controlling the on-off of the pressure oil between the pressure oil duct and the plunger hole; The plunger is movably embedded in the plunger hole, a groove is formed in one side, facing the curved surface, of the plunger, and a roller is embedded in the groov