CN112253271B

CN112253271B - Hydraulic transmission valve mechanism

Info

Publication number: CN112253271B
Application number: CN202011149792.0A
Authority: CN
Inventors: 权宁; 纪海宾
Original assignee: Xuzhou College of Industrial Technology
Current assignee: Xuzhou College of Industrial Technology
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-08-31
Anticipated expiration: 2040-10-23
Also published as: CN112253271A

Abstract

The invention relates to a hydraulic transmission valve mechanism, which comprises a driving cam, a double-valve component, a secondary hydraulic driving component and an oil supply oil way, wherein the oil supply end of the oil supply oil way is communicated with an oil inlet of the secondary hydraulic driving component through an oil supply pipeline, an oil supply control valve is arranged on the oil supply pipeline, the oil return end of the oil supply oil way is communicated with an oil outlet of the secondary hydraulic driving component through an oil return pipeline, and an oil return control valve is arranged on the oil return pipeline; the pressed part of the double-valve component is in contact with or connected with the lower pressing part at the lower part of the secondary hydraulic driving component; the circumferential surface of the driving cam is in contact with the pressed part on the upper part of the secondary hydraulic driving assembly, double-channel exhaust is carried out, so that adjustment of the valve is realized, the adjustment is more stable, the adjustment of the valve is carried out through double valve channels, the work is more stable, the valve channels are effectively protected, the service life is prolonged, and the use cost is lowered.

Description

Hydraulic transmission valve mechanism

Technical Field

The invention relates to the technical field of valve transmission, in particular to a hydraulic transmission valve mechanism.

Background

The Fully Variable Valve System (FVVS) can realize continuous variation of the maximum lift of the Valve, the opening continuous angle of the Valve and the Valve timing, and has important significance for energy conservation and emission reduction of the engine. The FVVS can adopt the mode of early closing of the inlet valve (EIVC) to control the working medium quantity entering the cylinder, thereby canceling the throttle valve, the gasoline engine without the throttle valve can greatly reduce the pumping loss, and the fuel consumption in medium and small loads is reduced by 10-15%. The fully variable valve mechanism is matched with supercharging intercooling, so that the problems of deflagration and high heat load of an engine after supercharging can be solved, low-temperature combustion is realized on the premise of greatly improving the average effective pressure, the heat efficiency of the engine is improved, and the emission of harmful gas is reduced; therefore, the FVVS technology has become one of the important development directions of new internal combustion engine technology.

At present when variable gas valve mechanism is using, mainly come the business turn over gas to the valve through the speed of valve to control, this kind of control mode needs more accurate control, simultaneously because the harm of the difference of speed to gas passage increases to some extent, makes variable gas valve mechanism's life less, increases use cost.

Disclosure of Invention

To overcome the above disadvantages of the prior art, it is an object of the present invention to provide a hydraulic transmission valve mechanism capable of changing the variability of the gas valve ventilation by opening or closing multiple passages, and increasing the service life of the variable valve.

In order to achieve the above purpose, the present invention adopts the following technical scheme that a hydraulic transmission valve mechanism comprises a driving cam, a double-valve component, a secondary hydraulic driving component and an oil supply oil path, wherein an oil supply end of the oil supply oil path is communicated with an oil inlet of the secondary hydraulic driving component through an oil supply pipeline, an oil supply control valve is arranged on the oil supply pipeline, an oil return end of the oil supply oil path is communicated with an oil outlet of the secondary hydraulic driving component through an oil return pipeline, and an oil return control valve is arranged on the oil return pipeline; the pressed part of the double-valve component is in contact with or connected with the lower pressing part at the lower part of the secondary hydraulic driving component; the circumferential surface of the driving cam is in contact with a pressed part on the upper part of the secondary hydraulic driving assembly;

when the driving cam rotates, the pressing part of the secondary hydraulic driving assembly is pressed downwards, the pressing part of the secondary hydraulic driving assembly presses the pressed part of the double-air valve assembly one-step downwards, at the moment, an air valve channel in the double-air valve assembly is opened, when the air valve channel in the double-air valve assembly is completely opened, the oil supply control valve is opened, the oil supply oil way supplies oil to the secondary hydraulic driving assembly, the pressing part of the secondary hydraulic driving assembly continues to move downwards, the double-air valve assembly continues to be pressed downwards, the other air valve channel in the double-air valve assembly is opened, and the whole opening of double channels of the double-air valve assembly is completed.

The secondary hydraulic driving assembly comprises an outer sleeve and an inner sleeve which is arranged in the outer sleeve and slides in a sealing manner with the inner wall of the outer sleeve, an upper piston and a lower piston are arranged in the inner sleeve, and the upper piston is fixedly connected with the upper part of the inner sleeve; the upper piston and the lower piston are contacted to form an annular oil cavity, two ends of the outer sleeve are respectively provided with an outer oil inlet channel and an outer oil outlet channel, and two ends of the inner sleeve are respectively provided with an inner oil inlet channel and an inner oil outlet channel which are communicated with the annular oil cavity;

an upper push rod is arranged on the top of the upper piston, the top of the upper push rod extends out of the outer sleeve and is fixedly connected with an upper pressure plate arranged outside the outer sleeve, and the driving cam is in contact with the upper pressure plate; when the top of the convex part of the driving cam is contacted with the upper pressure plate, the outer oil inlet channel is communicated with the inner oil inlet channel, and the outer oil outlet channel is communicated with the inner oil outlet channel;

the lower part of the outer sleeve is provided with a T-shaped end socket, the bottom of the lower piston is fixedly connected with a lower push rod, the lower part of the lower push rod sequentially penetrates through the inner sleeve and the T-shaped end socket to extend to the lower end of the outer sleeve to be fixedly connected with a lower pressing plate, and the lower pressing plate is contacted with or connected with a pressed part of the double-air valve assembly;

the lower push rod is sleeved with an inner compression spring, one end of the inner compression spring is in contact with the lower piston, the other end of the inner compression spring extends out of the inner sleeve and is in contact with the end part of the T-shaped seal head, an outer compression spring is arranged between the lower end of the inner sleeve and the T-shaped seal head, and the outer compression spring is sleeved outside the inner compression spring.

The bottom of the lower piston is fixedly connected with a T-shaped connecting piece through a bolt, the bottom of the T-shaped connecting piece is fixedly connected with the lower push rod, the upper portion of the inner compression spring is sleeved on the T-shaped connecting piece, and the upper end of the inner compression spring is in contact with the T-shaped connecting piece.

The valve core is arranged in the valve shell, the upper part of the valve core is fixedly connected with a valve pressing rod, the upper end of the valve pressing rod penetrates through an air inlet arranged at the upper part of the valve shell and extends out of the valve shell to be fixedly connected with a valve pressing plate arranged outside the valve shell, and the valve pressing plate is contacted or connected with a pressing part of the secondary hydraulic driving assembly;

the valve core is internally provided with a first air passing channel and a second air passing channel which vertically penetrate through the upper end and the lower end of the valve core, and the first air passing channel and the second air passing channel are respectively communicated with a first air passing nozzle and a second air passing nozzle which are fixedly arranged at the bottom of the valve core;

the valve seat is vertically provided with a first air outlet channel and a second air outlet channel which penetrate through the valve seat and enable the first air passing nozzle and the second air passing nozzle to be inserted into, and the first air outlet channel and the second air outlet channel are respectively positioned right below the first air passing channel and the second air passing channel;

an opening valve is arranged in the first air outlet channel or the second air outlet channel;

the valve core and the valve seat are connected through a valve core compression spring,

when the secondary hydraulic driving assembly is pressed down for the first stage, the first air passing nozzle and the second air passing nozzle are inserted into the first air outlet channel and the second air outlet channel, at the moment, the end part of the first air passing nozzle or the second air passing nozzle is not in contact with an opening valve arranged in the first air outlet channel or the second air outlet channel, and the opening valve is in a closed state; when the secondary hydraulic pneumatic assembly is pressed down, the end part of the first air passing nozzle or the second air passing nozzle is in contact with the opening valve arranged in the first air outlet channel or the second air outlet channel, and the opening valve is opened.

The opening valve comprises a valve body, a valve core is arranged in the valve body, a vertical air inlet channel is arranged on the valve core, the lower part of the vertical air inlet channel is communicated with a horizontal air passing channel which is arranged in the valve core and penetrates through two end faces of the valve core, and an air passing groove extending downwards is arranged on the inner wall of the lower end of the valve body;

the valve core is connected with the bottom of the valve body through a valve core compression spring, and a valve body air outlet channel communicated with the inside of the valve body is arranged at the bottom of the valve body.

And an O-shaped sealing ring is arranged at the top of the valve core.

The lower end of the outer sleeve is fixedly connected with a sealing cover, and the sealing cover is in threaded connection with the outer circumferential surface of the outer sleeve.

The invention has the beneficial effects that: carry out the secondary control to double-valve subassembly through second grade hydraulic drive subassembly, when carrying out the primary control, it presses to carry out the one-level to double-valve subassembly through driving cam drive second grade hydraulic drive subassembly, a valve passage work in the double-valve subassembly, when needs adjust the valve, refuel to second grade hydraulic drive subassembly, second grade drive hydraulic drive subassembly carries out the second grade to double-valve subassembly and presses, another valve passage in the double-valve subassembly is opened, the binary channels in the double-valve subassembly are all opened, carry out the binary channels and exhaust the regulation that has realized the valve, more stability when adjusting, carry out the regulation of valve through the double-valve passage, it is more stable to work, effectual protection has been carried out to the valve passage, the service life is prolonged, use cost has been degraded.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the two-stage hydraulic drive assembly of the present invention;

FIG. 3 is a schematic structural view of a dual valve assembly of the present invention;

fig. 4 is a schematic view of the structure of the opening valve in the dual valve assembly.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example 1

The hydraulic transmission valve mechanism as shown in fig. 1 includes a driving cam 118, the driving cam 118 can be connected to a driving device of an engine to control the driving cam or control the driving cam through a driving motor installed outside, a dual valve assembly 2, a secondary hydraulic driving assembly 1, and an oil supply path 3, the oil supply path is provided by an oil path of the engine, an oil supply end of the oil supply path 3 is communicated with an oil inlet of the secondary hydraulic driving assembly 1 through an oil supply pipeline 5, an oil supply control valve 7 is arranged on the oil supply pipeline 5, an oil return end of the oil supply path 3 is communicated with an oil outlet of the secondary hydraulic driving assembly 1 through an oil return pipeline 4, and an oil return control valve 6 is arranged on the oil return pipeline 4; the pressed part of the double-valve component 2 is contacted or connected with the lower pressing part at the lower part of the secondary hydraulic driving component 1; the circumferential surface of the driving cam 118 is contacted with the pressed part at the upper part of the secondary hydraulic driving component 1;

when the double-valve component 2 is in operation, when the driving cam 118 rotates, the pressing part of the secondary hydraulic driving component 1 is pressed downwards, the pressing part of the secondary hydraulic driving component 1 presses the pressed part of the double-valve component 2 one-step downwards, at this time, a valve channel in the double-valve component 2 is opened, after the valve channel in the double-valve component 2 is completely opened, the oil supply control valve 7 is opened, the oil supply oil channel 3 supplies oil to the secondary hydraulic driving component 1, the pressing part of the secondary hydraulic driving component 1 continues to move downwards, the double-valve component 2 continues to be pressed downwards, the other valve channel in the double-valve component 2 is opened, the double channels of the double-valve component 2 are completely opened, when the double-valve component 2 needs to be closed, the oil supply control valve 7 is closed, the oil return control valve 6 is opened, hydraulic oil in the secondary hydraulic driving component 1 returns to the oil supply oil channel 3, the pressed part of the double-valve component 2 moves upwards, wherein a valve channel is closed, when the pressed part in the secondary hydraulic driving component 1 moves upwards to the position where the primary pressing is finished, the driving cam 118 rotates, the large end of the driving cam 118 is contacted with the pressed part of the secondary hydraulic driving component 1, the pressed part of the double-valve component continues to ascend, the other valve channel of the double-valve component is closed, the channel of the whole double-valve component is closed, and the resetting is finished; the double-channel exhaust is carried out, so that the adjustment of the valve is realized, the adjustment is more stable, the adjustment of the valve is carried out through the double-valve channel, the work is more stable, the valve channel is effectively protected, the service life is prolonged, and the use cost is reduced.

Example 2

On the basis of embodiment 1, in order to enable the secondary hydraulic drive assembly to better control the opening or closing of the two channels in the dual-valve assembly 2, so that the secondary hydraulic drive assembly can operate more stably, as shown in fig. 2, the secondary hydraulic drive assembly 1 includes an outer sleeve 101, an inner sleeve 102 disposed inside the outer sleeve 101 and sliding in a sealing manner with the inner wall of the outer sleeve 101, wherein the inner sleeve 102 slides up and down inside the outer sleeve 101 and is in sealing contact with the inner wall of the outer sleeve 101;

an upper piston 103 and a lower piston 104 are arranged in the inner sleeve 102, and the upper piston 103 is fixedly connected with the upper part of the inner sleeve 102; when the oil filling device is used, the upper piston can drive the inner sleeve 102 to move up and down in the outer sleeve 101, the upper piston 103 is in contact with the lower piston 104 to form an annular oil cavity 105, the annular oil cavity is used for being filled with hydraulic oil, and when the hydraulic oil is filled, the upper piston is fixedly connected with the inner sleeve, and the lower piston is in sliding connection with the inner sleeve, so that when the oil is filled into the annular oil cavity, the hydraulic oil pushes the lower piston to move downwards, and the upper piston is separated from the lower piston; an outer oil inlet channel 106 and an outer oil outlet channel 107 are respectively arranged at two ends of the outer sleeve 101, and an inner oil inlet channel 108 and an inner oil outlet channel 109 communicated with the annular oil cavity 105 are respectively arranged at two ends of the inner sleeve 102; the outer oil inlet passage 106 is communicated with the oil supply pipeline 5, the oil outlet passage 107 is communicated with the oil return pipeline 4, particularly, when the oil-saving device works, the upper piston drives the inner sleeve to move downwards, and when the outer oil inlet passage 106 is communicated with the inner oil inlet passage 108, oil can be supplied to the annular oil cavity through the oil supply passage;

an upper push rod 119 is arranged on the top of the upper piston 103, the top of the upper push rod 119 extends out of the outer sleeve 101 and is fixedly connected with an upper pressure plate 117 arranged outside the outer sleeve 101, and the driving cam 118 is in contact with the upper pressure plate 117; when the top of the convex part of the driving cam 118 contacts with the upper pressure plate 117, the outer oil inlet channel 106 is communicated with the inner oil inlet channel 108, and the outer oil outlet channel 107 is communicated with the inner oil outlet channel 109;

a T-shaped end socket 114 is arranged at the lower part of the outer sleeve 101, a lower push rod 111 is fixedly connected to the bottom of the lower piston 104, the lower part of the lower push rod 111 sequentially penetrates through the inner sleeve 102 and the T-shaped end socket 114 to extend to the lower end of the outer sleeve 101 to be fixedly connected with a lower pressing plate 113, and the lower pressing plate 113 is contacted with or connected with a pressed part of the dual-valve assembly 2;

an inner compression spring 116 is sleeved on the lower push rod 111, one end of the inner compression spring 116 is in contact with the lower piston 104, the other end of the inner compression spring 116 extends out of the inner sleeve 102 to be in contact with the end part of the T-shaped end socket 114, an outer compression spring 115 is arranged between the lower end of the inner sleeve 102 and the T-shaped end socket 114, and the outer compression spring 115 is sleeved outside the inner compression spring 116. When the inner sleeve descends, the outer compression spring 115 is compressed, when the top of the convex part of the driving cam 118 is abutted against the upper pressing plate, the inner sleeve is fixed between the outer compression spring 115 and the driving cam 118, at the moment, the outer oil inlet channel 106 is communicated with the inner oil inlet channel 108, the outer oil outlet channel 107 is communicated with the inner oil outlet channel 109, oil is supplied to the annular oil cavity, the lower piston continues to descend, at the moment, the inner compression spring 116 is further compressed, when hydraulic oil in the annular oil cavity is removed, the compressed inner compression spring 116 pushes the lower piston to ascend to reset, meanwhile, the driving cam 118 rotates, one side of the driving cam, which is opposite to the top of the convex part, is contacted with the upper pressing plate, and the outer compression spring pushes the inner sleeve to ascend to complete the resetting work;

specifically, when the driving cam 118 rotates, the convex portion of the driving cam 118 contacts with the upper pressure plate 117, the lower pressure inner sleeve 102 descends to drive the lower piston 104 to descend, the lower push rod 111 pushes the lower pressure plate 113 to press the pressed portion of the dual valve assembly 2 downwards, when the top point of the convex portion of the driving cam 118 contacts with the upper pressure plate 117, the inner oil inlet channel 108 and the inner oil outlet channel 109 on the inner sleeve 102 are respectively communicated with the outer oil inlet channel 106 and the outer oil outlet channel 107 on the outer sleeve 101, at this time, the oil supply oil path 3 supplies oil into the annular oil cavity 105 through the oil supply pipeline 5, the outer oil inlet channel 106 and the inner oil inlet channel 108, hydraulic oil in the annular oil cavity 105 is increased, the lower piston 104 is pressed downwards, and the lower piston 104 continues to descend; the lower piston 104 drives the lower pressing plate 113 to move downwards to press the double-valve component 2 for the second stage, double channels of the double-valve component 2 are opened, the air quantity of the double-valve component is changed, and the valve of the double-valve component is opened or closed in a double driving mode of driving a cam and hydraulic pressure, so that the double-valve component is more stable in working, the vibration is avoided, the opening stability of the double-valve component is improved, and the double-valve component is safer and more reliable in working;

further, in order to facilitate the connection between the lower piston 104 and the lower push rod, a T-shaped connector 110 is fixedly connected to the bottom of the lower piston 104 through a bolt, the bottom of the T-shaped connector 110 is fixedly connected to the lower push rod 111, the upper portion of the inner compression spring 116 is sleeved on the T-shaped connector 110, and the upper end of the inner compression spring 116 is in contact with the T-shaped connector 110.

A sealing cap 112 is fixedly connected to the lower end of the outer sleeve 101, and the sealing cap 112 is in threaded connection with the outer circumferential surface of the outer sleeve 101.

When the two-stage hydraulic drive assembly is installed, the lower push rod is fixedly connected to the T-shaped connecting piece 110, all needed springs are installed at respective positions, the T-shaped end socket 114 is installed at the lower end of the outer sleeve, and the river sealing cover 112 is fixedly installed.

Example 3

On the basis of embodiment 1, it is ensured that the double channels in the double-valve assembly can be smoothly opened by first-stage pressing and second-stage pressing in the secondary hydraulic drive assembly 1, as shown in fig. 3, the double-channel hydraulic drive assembly comprises a valve housing 201 and a valve seat 202 fixedly connected to the lower end of the valve housing 201, a valve core 203 is arranged in the valve housing 201, a valve pressing rod 204 is fixedly connected to the upper part of the valve core 203, the upper end of the valve pressing rod 204 penetrates through an air inlet 2011 arranged at the upper part of the valve housing 201 and extends out of the valve housing 201 to be fixedly connected with a valve pressing plate 205 arranged outside the valve housing 201, and the valve pressing plate 205 is in contact with or connected with a pressing part of the secondary hydraulic drive assembly 1; in this embodiment, the valve pressing plate 205 is fixedly connected with the pressing portion of the secondary hydraulic drive assembly 1; an O-shaped sealing ring 214 is arranged between the top of the valve core 203 and the valve housing 201. The O-shaped sealing ring can seal an air inlet 2011 on the valve shell 201, and can seal the first air passing channel 206 and the second air passing channel 207, so that the whole double-valve assembly is better in sealing performance;

a first air passing channel 206 and a second air passing channel 207 which vertically penetrate through the upper end and the lower end of the valve core 203 are arranged in the valve core 203, and the first air passing channel 206 and the second air passing channel 207 are respectively communicated with a first air passing nozzle 208 and a second air passing nozzle 209 which are fixedly arranged at the bottom of the valve core 203;

a first air outlet channel 213 and a second air outlet channel 211 which penetrate through the valve seat 202 and enable the first air passing nozzle 208 and the second air passing nozzle 209 to be inserted are vertically arranged on the valve seat 202, and the first air outlet channel 213 and the second air outlet channel 211 are respectively positioned right below the first air passing channel 206 and the second air passing channel 207;

an opening valve 212 is arranged in the first air outlet channel 213 or the second air outlet channel 211;

the valve core 203 and the valve seat 202 are connected by a valve core compression spring 210,

when the secondary hydraulic drive assembly 1 is pressed down for the first stage, the first air passing nozzle 208 and the second air passing nozzle 209 are inserted into the first air outlet channel 213 and the second air outlet channel 211, at this time, the end of the first air passing nozzle 208 or the second air passing nozzle 209 is not contacted with the opening valve 212 arranged in the first air outlet channel 213 or the second air outlet channel 211, and the opening valve 212 is in a closed state; when the secondary hydropneumatic assembly 1 is pressed down for the second time, the end of the first or second

air passing nozzle

208 or 209 contacts with the opening valve 212 arranged in the first or second

air outlet channel

213 or 211, and the opening valve 212 is opened.

In order to enable the first air passing nozzle or the second air passing nozzle 209 to enter the first air outlet channel or the second air outlet channel to smoothly open the opening valve, the opening valve 212 comprises a valve body 2121, a valve core 2122 is arranged in the valve body 2121, a vertical air inlet channel 2123 is arranged on the valve core 2122, the lower part of the vertical air inlet channel 2123 is communicated with a horizontal air passing channel 2124 which is arranged in the valve core 2122 and penetrates through two end faces of the valve core 2122, and an air passing groove 2125 extending downwards is arranged on the inner wall of the lower end of the valve body 2121;

the valve core 2122 is connected to the bottom of the valve body 2121 via a valve core compression spring 2126, and the bottom of the valve body 2121 is provided with a valve body air outlet passage 2127 communicated with the inside of the valve body 2121.

When the valve body works, the air nozzle enters the valve body 2121 and pushes the valve core 2122 to move downwards, when the transverse channel of the valve core enters the air passing groove 2125, the vertical air inlet channel, the horizontal air passing channel and the air passing groove are communicated in sequence, air in the air inlet nozzle enters the valve body 2121 through the air inlet nozzle, then enters the lower part of the valve body through the vertical air inlet channel, the horizontal air passing channel and the air passing groove and is discharged through the valve body air outlet channel 2127, when secondary pressing is completed, the air channel is opened, and the two channels can be opened or closed stably.

The above embodiments are merely illustrative of the present invention, and should not be construed as limiting the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.

Claims

1. The hydraulic transmission valve mechanism is characterized by comprising a driving cam (118), a double-valve component (2), a secondary hydraulic driving component (1) and an oil supply oil way (3), wherein the oil supply end of the oil supply oil way (3) is communicated with an oil inlet of the secondary hydraulic driving component (1) through an oil supply pipeline (5), an oil supply control valve (7) is arranged on the oil supply pipeline (5), the oil return end of the oil supply oil way (3) is communicated with an oil outlet of the secondary hydraulic driving component (1) through an oil return pipeline (4), and an oil return control valve (6) is arranged on the oil return pipeline (4); the pressed part of the double-valve component (2) is contacted with or connected with the lower pressing part at the lower part of the secondary hydraulic driving component (1); the circumferential surface of the driving cam (118) is in contact with a pressed part at the upper part of the secondary hydraulic driving assembly (1);

when the driving cam (118) rotates, the pressing-down part of the secondary hydraulic driving assembly (1) is pressed down, the pressing-down part of the secondary hydraulic driving assembly (1) presses down the pressed part of the double-valve assembly (2) in a primary mode, at the moment, a valve channel in the double-valve assembly (2) is opened, after the valve channel in the double-valve assembly (2) is completely opened, the oil supply control valve (7) is opened, the oil supply oil way (3) supplies oil to the secondary hydraulic driving assembly (1), the pressing-down part of the secondary hydraulic driving assembly (1) continues to move down, the double-valve assembly (2) continues to be pressed down, the other valve channel in the double-valve assembly (2) is opened, and the double channels of the double-valve assembly (2) are completely opened.

2. The hydraulically driven valve mechanism as claimed in claim 1, characterized in that the secondary hydraulic drive assembly (1) comprises an outer sleeve (101), an inner sleeve (102) arranged in the outer sleeve (101) and sliding in a sealing manner with the inner wall of the outer sleeve (101), an upper piston (103) and a lower piston (104) are arranged in the inner sleeve (102), and the upper piston (103) is fixedly connected with the upper part of the inner sleeve (102); the upper piston (103) is in contact with the lower piston (104) to form an annular oil cavity (105), two ends of the outer sleeve (101) are respectively provided with an outer oil inlet channel (106) and an outer oil outlet channel (107), and two ends of the inner sleeve (102) are respectively provided with an inner oil inlet channel (108) and an inner oil outlet channel (109) which are communicated with the annular oil cavity (105);

an upper push rod (119) is arranged at the top of the upper piston (103), the top of the upper push rod (119) extends out of the outer sleeve (101) and is fixedly connected with an upper pressure plate (117) arranged outside the outer sleeve (101), and the driving cam (118) is contacted with the upper pressure plate (117); when the top of the convex part of the driving cam (118) is contacted with the upper pressure plate (117), the outer oil inlet channel (106) is communicated with the inner oil inlet channel (108), and the outer oil outlet channel (107) is communicated with the inner oil outlet channel (109);

the lower part of the outer sleeve (101) is provided with a T-shaped seal head (114), the bottom of the lower piston (104) is fixedly connected with a lower push rod (111), the lower part of the lower push rod (111) sequentially penetrates through the inner sleeve (102) and the T-shaped seal head (114) to extend to the lower end of the outer sleeve (101) to be fixedly connected with a lower pressing plate (113), and the lower pressing plate (113) is contacted with or connected with a pressed part of the double-valve assembly (2);

the push rod (111) goes up the cover and is equipped with interior compression spring (116), and this interior compression spring (116) one end contacts with piston (104) down, and the other end extends to the outer tip contact with T type head (114) of inner skleeve (102), be equipped with outer compression spring (115) between the lower extreme of inner skleeve (102) and T type head (114), and this outer compression spring (115) cover is established outside interior compression spring (116).

3. The hydraulically driven valve mechanism as claimed in claim 2, characterized in that the bottom of the lower piston (104) is fixedly connected with a T-shaped connecting member (110) by a bolt, the bottom of the T-shaped connecting member (110) is fixedly connected with the lower push rod (111), the upper part of the inner compression spring (116) is sleeved on the T-shaped connecting member (110), and the upper end of the inner compression spring (116) is in contact with the T-shaped connecting member (110).

4. The hydraulic transmission valve mechanism according to claim 1 or 2, characterized by comprising a valve housing (201) and a valve seat (202) fixedly connected to the lower end of the valve housing (201), wherein a valve core (203) is arranged in the valve housing (201), a valve pressing rod (204) is fixedly connected to the upper part of the valve core (203), the upper end of the valve pressing rod (204) penetrates through an air inlet (2011) arranged at the upper part of the valve housing (201) and extends out of the valve housing (201) to be fixedly connected with a valve pressing plate (205) arranged outside the valve housing (201), and the valve pressing plate (205) is contacted or connected with a pressing part of the secondary hydraulic drive assembly (1);

a first air passing channel (206) and a second air passing channel (207) which vertically penetrate through the upper end and the lower end of the valve core (203) are arranged in the valve core (203), and the first air passing channel (206) and the second air passing channel (207) are respectively communicated with a first air passing nozzle (208) and a second air passing nozzle (209) which are fixedly arranged at the bottom of the valve core (203);

the valve seat (202) is vertically provided with a first air outlet channel (213) and a second air outlet channel (211) which penetrate through the valve seat (202) and enable a first air passing nozzle (208) and a second air passing nozzle (209) to be inserted into, and the first air outlet channel (213) and the second air outlet channel (211) are respectively positioned right below the first air passing channel (206) and the second air passing channel (207);

an opening valve (212) is arranged in the first air outlet channel (213) or the second air outlet channel (211);

the valve core (203) and the valve seat (202) are connected through a valve core compression spring (210),

when the secondary hydraulic driving assembly (1) is pressed down for the first stage, the first air passing nozzle (208) and the second air passing nozzle (209) are inserted into the first air outlet channel (213) and the second air outlet channel (211), at the moment, the end part of the first air passing nozzle (208) or the second air passing nozzle (209) is not in contact with the opening valve (212) arranged in the first air outlet channel (213) or the second air outlet channel (211), and the opening valve (212) is in a closed state; when the secondary hydropneumatic assembly (1) is pressed down for the second stage, the end part of the first air passing nozzle (208) or the second air passing nozzle (209) is in contact with an opening valve (212) arranged in the first air outlet channel (213) or the second air outlet channel (211), and the opening valve (212) is opened.

5. The hydraulically driven valve mechanism as claimed in claim 4, wherein the opening valve (212) comprises a valve body (2121), a valve core (2122) is disposed in the valve body (2121), a vertical air inlet passage (2123) is disposed on the valve core (2122), a lower portion of the vertical air inlet passage (2123) is communicated with a horizontal air passage (2124) disposed in the valve core (2122) and penetrating through two end surfaces of the valve core (2122), and an air passage groove (2125) extending downward is disposed on an inner wall of a lower end of the valve body (2121);

the valve core (2122) is connected with the bottom of the valve body (2121) through a valve core compression spring (2126), and the bottom of the valve body (2121) is provided with a valve body air outlet channel (2127) communicated with the interior of the valve body (2121).

6. A hydraulically actuated valve train as claimed in claim 4, characterized in that an O-ring seal (214) is provided between the top of the valve core (203) and the valve housing (201).

7. A hydraulically driven valve train according to claim 2, characterized in that a closure cap (112) is fixedly connected to the lower end of the outer sleeve (101), the closure cap (112) being in threaded connection with the outer circumferential surface of the outer sleeve (101).