CN115182994B - Interlocking integrated valve, protection gas circuit system and control method of protection gas circuit system - Google Patents
Interlocking integrated valve, protection gas circuit system and control method of protection gas circuit system Download PDFInfo
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- CN115182994B CN115182994B CN202210737697.5A CN202210737697A CN115182994B CN 115182994 B CN115182994 B CN 115182994B CN 202210737697 A CN202210737697 A CN 202210737697A CN 115182994 B CN115182994 B CN 115182994B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 15
- 230000007935 neutral effect Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/36—Interlocking devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
Abstract
The invention discloses an interlocking integrated valve, a protection gas circuit system and a control method thereof, wherein the interlocking integrated valve and a power takeoff switching valve are included; the valve body of the interlocking valve and the valve body of the power takeoff switching valve are integrated valve bodies; the interlocking valves which can be adapted to various transmissions are integrated, meanwhile, the power takeoff switching valve is integrated, the cost and the failure rate are greatly reduced, meanwhile, the gas path is simplified, the gas path is more convenient to assemble and maintain, the valves are integrated, the process holes are formed in the valve body and are connected with the internal gas path, the joints and the gas pipes in the original gas path are replaced, the corresponding required paths are reduced, the response speed of the interlocking system is higher, the problem of stagnation and gas leakage of the traditional rubber pipe gas path is solved, the ejector rod part further is provided with the friction-resistant self-lubricating bushing, and the service life of the product is prolonged by 20%; the valve core returns to a free state from a compressed state, and except for the force of a return spring, the valve core is provided with air-assisted return, so that the response speed of the air valve is improved.
Description
Technical Field
The invention belongs to the technical field of speed changers, and relates to an interlocking integrated valve, a protection gas circuit system and a control method thereof.
Background
At present, heavy trucks all adopt a double-intermediate-shaft transmission with a main box structure and an auxiliary box structure, and the auxiliary transmission realizes gas path on-off control, high/low gear switching and protection of an auxiliary box synchronizer by virtue of a gas valve. The transmission with the power take-off is separately provided with an interlocking protection gas circuit, and two gas valves, namely an interlocking valve and a power take-off switching valve, are respectively connected. In the existing gas circuit, the air valve is simple in structure, single in function and low in cost, has design risk, is low in service life of products, and is very inconvenient for drivers due to the fact that clamping stagnation and air leakage occur frequently in the using process.
Disclosure of Invention
The invention aims to solve the problems of clamping stagnation and air leakage in the using process of a product, and provides an interlocking integrated valve, a protection air circuit system and a control method thereof. Meanwhile, the interlocking integrated valve can completely replace the existing transmission upper air valve, and seamless butt joint of new and old products is realized.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides an interlocking integrated valve comprising:
the valve body is provided with an interlocking valve mounting hole and a power takeoff switching valve rotating hole; the interlocking valve mounting hole and the power takeoff switching valve mounting hole are blind holes, and the openings are formed in two side surfaces opposite to the valve body; the interlocking valve mounting hole is communicated with the power takeoff switching valve mounting hole through a plurality of process holes formed in the valve body; the valve body is also provided with an air inlet, an air outlet and a parking power taking control port, the air inlet, the air outlet and the parking power taking control port are communicated with a power takeoff switching valve installation hole, and the air outlet is communicated with an interlocking valve installation hole;
the first valve core of the power takeoff switching valve is arranged in a power takeoff switching valve safety rotating hole, and the end part of the first valve core is sealed through a sealing cover;
and the second valve core of the interlocking valve is arranged in the interlocking valve mounting hole, and the end part of the second valve core is provided with the lower cover.
The power takeoff switching valve rotating hole comprises a piston mounting section and a first valve core mounting section, and the inner diameter of the piston mounting section is larger than that of the first valve core mounting section; the power takeoff switching valve comprises a piston, the piston is arranged in the piston mounting section, a sealing cover is arranged on one side, close to the opening of the power takeoff switching valve mounting hole, of the piston, and a check ring is arranged at the end part of the sealing cover; one side of the piston, which is far away from the opening of the power takeoff switching valve mounting hole, is connected with a first valve core, and the first valve core is arranged in the first valve core mounting section.
The piston is sealed with the piston mounting section of the power takeoff switching valve mounting hole through a lip-shaped sealing ring.
The blind hole is formed in one end, far away from the piston, of the first valve core, a first spring is arranged in the blind hole, one end of the first spring is connected with the first valve core, and the other end of the first spring abuts against the end portion of the power takeoff switching valve mounting hole.
The interlocking valve comprises a lower cover, an ejector rod and a second valve core, and the second valve core is arranged in the interlocking valve mounting hole; the lower cover is arranged at the outer side of the interlocking valve mounting hole, a through hole penetrating through the lower cover is formed in the lower cover, and the through hole is opposite to the interlocking valve mounting hole; the ejector rod is arranged in the through hole of the lower cover, and one end of the ejector rod is contacted with the second valve core.
And one end of the second valve core, which is far away from the ejector rod, is provided with a blind hole, a second spring is arranged in the blind hole, one end of the second spring is connected with the second valve core, and the other end of the second spring is propped against the end part of the interlocking valve mounting hole.
A guide sleeve is arranged between the second valve core and the interlocking valve mounting hole; a self-lubricating bushing is arranged between the ejector rod and the through hole of the lower cover.
The exhaust port is provided with a plurality of sealing gaskets, and the exhaust port is provided with a dust cover.
In a second aspect, the invention provides a protection gas circuit system adopting an interlocking integrated valve, comprising a gas storage tank, a double pneumatic control integrated valve and the interlocking integrated valve; the air outlet end of the air storage tank is connected with an air filter, and the outlet of the air filter is respectively connected with the air source input port of the double pneumatic control integrated valve and the air inlet of the interlocking integrated valve; the air inlet end of the air storage tank is respectively connected with the first electromagnetic valve and the second electromagnetic valve; the control end of the first electromagnetic valve is connected with the stopping power taking switch, and the air inlet side of the first electromagnetic valve is connected with the air outlet end of the auxiliary box cylinder; the control end of the second electromagnetic valve is connected with a driving power take-off switch, and the air inlet side of the second electromagnetic valve is connected with the air outlet end of the power take-off cylinder;
the pre-selection valve air inlet and the pre-selection valve air outlet of the double pneumatic control integrated valve are respectively connected with the air inlet and the air outlet corresponding to the pre-selection valve; the first auxiliary cylinder exhaust port and the second auxiliary cylinder exhaust port of the double pneumatic control integrated valve are communicated with the auxiliary tank cylinder; the first air outlet of the interlocking integrated valve is connected with the air inlet of the parking power taking protection air circuit of the double pneumatic control integrated valve, and the second air outlet is connected to the air inlet side of the first electromagnetic valve.
In a third aspect, the present invention provides a control method for protecting an air path system, including the steps of:
(1) When the auxiliary box is switched between high and low gears:
firstly, a high-low gear shifting head of a preselection valve is shifted to perform gear preselection operation, at the moment, the preselection valve controls the valve core in the double pneumatic control integrated valve to act, valve core position switching is completed, and at the moment, an auxiliary box cylinder does not act; then the gear lever is switched to a neutral gear, the ejector rod of the double pneumatic control integrated valve returns to a free state, the air inlet is communicated with the air outlet, and the auxiliary box cylinder is switched under the action of compressed air;
(2) When the main box and the auxiliary box are protected:
in the switching process of the auxiliary box cylinder, the ejector rod of the interlocking integrated valve is in a free state, compressed air subjected to pressure reduction is filtered by the air filter, enters the interlocking cylinder through the interlocking integrated valve, is locked by the gear shifting shaft, and cannot be put into a gear; when the auxiliary box cylinder is switched into place, the ejector rod of the interlocking integrated valve is in a compressed state, the compressed air of the interlocking cylinder is discharged to the atmosphere through the interlocking integrated valve, and the interlocking shaft is unlocked and can be used for engaging in a gear;
(3) When parking power take-off is performed:
the main tank is in neutral gear, the parking power take-off switch is turned on, and the auxiliary tank cylinder is switched to neutral gear under the action of high-pressure air of the whole vehicle; the control end of the double pneumatic control integrated valve is ventilated, so that the air valve keeps a low gear, and the parking power taking protection function is realized; when the pre-selection valve shifting head is switched at this time, the auxiliary box does not act, so that the synchronizer is protected; the control end of the interlocking integrated valve is ventilated, compressed air is discharged through the interlocking integrated valve, the main box is unlocked, and at the moment, gear engagement can be realized, and parking power taking is realized.
Compared with the prior art, the invention has the following beneficial effects:
the invention integrates the interlocking valve which can be adapted to various speed changers, has better interchangeability, integrates the power takeoff switching valve, integrates various valves into one valve at the same time of greatly integrating the product degree, greatly reduces the cost and the failure rate, simplifies the gas circuit, ensures that the gas circuit is more convenient to assemble and maintain, integrates a plurality of valves, processes the process holes in the valve body, connects the internal gas channel, replaces the joint and the gas pipe in the original gas circuit, reduces the corresponding required path, has higher response speed of the interlocking system, and further solves the problems of clamping stagnation and gas leakage of the traditional rubber tube gas circuit.
Furthermore, the push rod part of the invention uses the friction-resistant self-lubricating bushing, thereby prolonging the service life of the product by 20%.
Furthermore, the valve core of the invention adopts the design of the concave-convex shaft of the polish rod, so that the friction is reduced, the air inlet efficiency of the conversion valve of the power takeoff is improved, the air outlet efficiency of the interlocking valve is improved, the impact of O-shaped rings at two ends is reduced, and the abrasion is reduced; the valve core returns to a free state from a compressed state, and except for the force of a return spring, the valve core is provided with air-assisted return, so that the response speed of the air valve is improved.
Furthermore, the two ends of the valve core are additionally provided with the supporting rings, so that the stable movement of the valve core is ensured, and the eccentric wear is prevented.
Furthermore, the ejector rod and the valve core of the gas circuit control valve are designed in a split mode, so that lateral force received by the ejector rod is prevented from being transmitted to the valve core, axial movement of the valve core is ensured not to be eccentric, and service life is prolonged.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the mechanism of the interlocking integrated valve of the present invention.
Fig. 2 is a schematic structural view of the ejector rod in a compressed state and the control port in a non-pneumatic state.
Fig. 3 is a schematic view of the structure of the ejector rod in a free state and the control port in a non-air state.
Fig. 4 is a schematic view of the structure of the ejector rod in a free state and in a ventilation state of the control port.
Fig. 5 is a schematic structural diagram of the protection gas circuit system of the present invention.
Wherein: 1-check ring, 2-sealing cover, 3-piston, 4-lip seal ring, 5-valve body, 6-valve core, 17-sealing gasket, 8-dust cover, 9-lower cover, 10-self-lubricating bushing, 11-ejector rod, 12-valve core 2, 13-guide sleeve, 14-second spring, 15-first spring, 21-air inlet, 22-air outlet, 23-air outlet, 24-parking power take-off control port, 50-air storage tank, 51-pre-selection valve, 52-air filter, 53-interlocking integrated valve, 54-auxiliary box cylinder, 55-power take-off cylinder, S1-first electromagnetic valve, S2-second electromagnetic valve, K1-parking power take-off switch, K2-driving power take-off switch; 41-preselection valve vent; 42-stopping power taking protection gas path gas inlet; 101-preselecting a valve air inlet; 102-an air source input port; 201-a first auxiliary cylinder exhaust port; 202-second slave cylinder exhaust port.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, an embodiment of the present invention discloses an interlock integration valve including a valve body 5, a power take-off switching valve, and an interlock valve.
The valve body 5 is provided with an interlocking valve mounting hole and a power takeoff switching valve rotating hole; the interlocking valve mounting hole and the power takeoff switching valve mounting hole are blind holes, and the openings are formed in two side surfaces opposite to the valve body 5; the interlocking valve mounting hole is communicated with the power takeoff switching valve mounting hole through a plurality of process holes formed in the valve body 5; the valve body 5 is also provided with an air inlet 21, an air outlet 22, an air outlet 23 and a parking power taking control port 24, the air inlet 21, the air outlet 23 and the parking power taking control port 24 are communicated with a power takeoff switching valve rotating-mounting hole, and the air outlet 22 is communicated with an interlocking valve mounting hole. The exhaust port 23, the exhaust port 23 is provided with a plurality of sealing gaskets 7, and the exhaust port 23 is provided with a dust cover 8.
The first valve core 6 of the power takeoff switching valve is arranged in a power takeoff switching valve rotating hole, and the end part of the first valve core is sealed through the sealing cover 2; the power takeoff switching valve rotating hole comprises a piston mounting section and a first valve core mounting section, and the inner diameter of the piston mounting section is larger than that of the first valve core mounting section. The power takeoff switching valve comprises a piston 3, wherein the piston 3 is arranged in a piston mounting section, a sealing cover 2 is arranged on one side, close to an opening of a power takeoff switching valve mounting hole, of the piston, and a check ring 1 is arranged at the end part of the sealing cover 2; one side of the piston 3, which is far away from the opening of the power takeoff switching valve mounting hole, is connected with a first valve core 6, and the first valve core 6 is arranged in the first valve core mounting section. The piston 3 and the piston mounting section of the power take-off switching valve mounting hole are sealed by a lip-shaped sealing ring 4. A blind hole is formed in one end, far away from the piston 3, of the first valve core 6, a first spring 15 is arranged in the blind hole, one end of the first spring 15 is connected with the first valve core 6, and the other end of the first spring 15 abuts against the end of the power takeoff switching valve mounting hole.
And an interlocking valve, wherein a second valve core 12 of the interlocking valve is arranged in the interlocking valve mounting hole, and the end part of the interlocking valve is mounted on the lower cover 9. The interlocking valve comprises a lower cover 9, an ejector rod 11 and a second valve core 12, and the second valve core 12 is arranged in an interlocking valve mounting hole; the lower cover 9 is arranged at the outer side of the interlocking valve mounting hole, a through hole penetrating through the lower cover 9 is formed in the lower cover 9, and the through hole is opposite to the interlocking valve mounting hole; the ejector rod 11 is arranged in the through hole of the lower cover 9, and one end of the ejector rod is contacted with the second valve core 12. The second valve core 12 is far away from the end of the ejector rod 11 and is provided with a blind hole, a second spring 14 is arranged in the blind hole, one end of the second spring 14 is connected with the second valve core 12, and the other end of the second spring is propped against the end part of the interlocking valve mounting hole. A guide sleeve 13 is arranged between the second valve core 12 and the interlocking valve mounting hole; a self-lubricating bushing 10 is arranged between the ejector rod 11 and the through hole of the lower cover 9.
As shown in fig. 5, the embodiment of the present invention discloses a protection gas circuit system using an interlocking integrated valve, which comprises a gas storage tank 50 and a double pneumatic control integrated valve 56; the air outlet end of the air storage tank 50 is connected with an air filter 52, and the outlet of the air filter 52 is respectively connected with an air source input port 102 of the double pneumatic control integrated valve 56 and the air inlet of the interlocking integrated valve 53; the air inlet end of the air storage tank 50 is respectively connected with a first electromagnetic valve S1 and a second electromagnetic valve S2; the control end of the first electromagnetic valve S1 is connected with a stopping power taking switch K1, and the air inlet side of the first electromagnetic valve S1 is connected with the air outlet end of the auxiliary box cylinder 54; the control end of the second electromagnetic valve S2 is connected with a driving power take-off switch K2, and the air inlet side of the second electromagnetic valve S2 is connected with the air outlet end of the power take-off cylinder 55.
The preselection valve air inlet 101 and the preselection valve air outlet 41 of the double pneumatic control integrated valve 56 are respectively connected with the corresponding air inlet and outlet of the preselection valve 51; the first and second sub-cylinder exhaust ports 201 and 202 of the double air control integration valve 56 are both communicated with the sub-tank cylinder 54; the first air outlet of the interlocking integrated valve 53 is connected with the parking power taking protection air path air inlet 42 of the double pneumatic control integrated valve 56, and the second air outlet is connected to the air inlet side of the first electromagnetic valve S1.
The embodiment of the invention also discloses a control method for protecting the gas circuit system, which comprises the following steps:
(1) When the auxiliary box is switched between high and low gears:
the pre-selection valve high-low gear shifting head is shifted firstly to perform pre-selection operation in gear, at the moment, the pre-selection valve 51 controls the valve core inside the double pneumatic control integrated valve 56 to act, the valve core position switching is completed, and at the moment, the auxiliary box cylinder 54 does not act (the reason is that in the gear state, the air inlet and the air outlet of the double pneumatic control integrated valve are cut off, and no compressed air is input); then the gear lever is switched to a neutral gear, the ejector rod of the double pneumatic control integrated valve 56 returns to a free state, the air inlet is communicated with the air outlet, and the auxiliary tank air cylinder 54 finishes switching under the action of compressed air;
(2) When the main box and the auxiliary box are protected:
in the switching process of the auxiliary tank cylinder 54, the ejector rod 11 of the interlocking integrated valve 53 is in a free state, the compressed air subjected to pressure reduction is filtered by the air filter 52, enters the operation interlocking cylinder through the interlocking integrated valve 53, and the gear shifting shaft is locked (cannot rotate) and cannot be engaged in a gear; when the auxiliary tank cylinder 54 is switched into place, the ejector rod 11 of the interlocking integrated valve 53 is in a compressed state, the interlocking cylinder compressed air is discharged to the atmosphere through the interlocking integrated valve 53, and the interlocking shaft is unlocked (rotatable) and can be engaged into a gear;
(3) When parking power take-off is performed:
the main tank is in neutral gear, a parking power take-off switch (ventilation) is turned on, and the auxiliary tank cylinder 54 is switched to neutral gear under the action of high-pressure air of the whole vehicle; the control end of the double pneumatic control integrated valve 56 is ventilated, so that the air valve keeps a low gear, and the parking power taking protection function is realized; when the pre-selection valve shifting head is switched at this time, the auxiliary box does not act, so that the synchronizer is protected; the control end of the interlocking integrated valve 53 is ventilated, compressed air is discharged through the interlocking integrated valve 53, the main box is unlocked, and at the moment, gear engagement can be achieved, and parking power taking is achieved.
The two pneumatic protection modes are realized by simultaneously additionally installing the double pneumatic control integrated valve and the interlocking integrated valve. The two air valves can be used separately, the working principle is unchanged, and only the air path design is slightly adjusted.
Working principle:
(1) The ejector rod is in a compressed state, and a control port is airless
The vehicle is in a running state, and the auxiliary box is in a high-gear/low-gear position. As shown in fig. 2, the ejector rod 11 is compressed by the cylinder fork shaft to drive the second valve core 12 to move upwards. At this time, the air inlet 21 and the air outlet 22 are cut off, and the air outlet 22 compresses air to be discharged from the air outlet 23 through the technological hole of the valve body 5 and the groove on the second valve core 12. At this time, the main box can be normally put into gear.
(2) Free state of ejector rod and airless control port
The auxiliary box of the vehicle is in high-low gear switching, the ejector rod 11 is in a free state and is positioned at the groove position of the shifting fork shaft. At this time, as shown in fig. 3, the air inlet 21 is communicated with the air outlet 22, and compressed air enters the air inlet 21 and the air outlet 22 and enters the operating gear locking cylinder, so that the main box cannot be in gear. The main box and the auxiliary box are interlocked, and the auxiliary box synchronizer is protected.
(3) Ejector rod free state, control port ventilation
The vehicle is in a parking power take-off state. As shown in fig. 4, the ejector rod 11 is in a free state and is positioned at the position of the groove of the shifting fork shaft. The parking force taking control port 24 is ventilated, and the piston 3 drives the first valve core 6 to move downwards. At this time, the air inlet 21 to the air outlet 22 are cut off, and the air outlet 22 compresses air to the air outlet 23 through the small hole of the second valve core 12, the process hole of the valve body 5 and the small hole of the first valve core 6. At the moment, the auxiliary box is in a neutral gear state, so that the parking and power taking function can be realized.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An interlocking integrated valve, comprising:
the valve body (5) is provided with an interlocking valve mounting hole and a power takeoff switching valve rotating hole; the interlocking valve mounting hole and the power takeoff switching valve mounting hole are blind holes, and the openings are formed in two side surfaces opposite to the valve body (5); the interlocking valve mounting hole is communicated with the power takeoff switching valve mounting hole through a plurality of process holes formed in the valve body (5); the valve body (5) is also provided with an air inlet (21), an air outlet (22), an air outlet (23) and a parking power take-off control port (24), the air inlet (21), the air outlet (23) and the parking power take-off control port (24) are communicated with a power take-off switching valve rotating hole, and the air outlet (22) is communicated with an interlocking valve mounting hole; the power takeoff switching valve rotating hole comprises a piston mounting section and a first valve core mounting section, and the inner diameter of the piston mounting section is larger than that of the first valve core mounting section;
the first valve core (6) of the power takeoff switching valve is arranged in a power takeoff switching valve safety rotating hole, and the end part of the first valve core is sealed through a sealing cover (2); the power takeoff switching valve comprises a piston (3), wherein the piston (3) is arranged in a piston mounting section, a sealing cover (2) is arranged on one side, close to an opening of a power takeoff switching valve mounting hole, of the piston, and a check ring (1) is arranged at the end part of the sealing cover (2); one side of the piston (3) far away from the opening of the power takeoff switching valve mounting hole is connected with a first valve core (6), and the first valve core (6) is arranged in the first valve core mounting section;
the second valve core (12) of the interlocking valve is arranged in the interlocking valve mounting hole, and the end part of the second valve core is provided with a lower cover (9); the interlocking valve comprises a lower cover (9), an ejector rod (11) and a second valve core (12), and the second valve core (12) is arranged in an interlocking valve mounting hole; the lower cover (9) is arranged at the outer side of the interlocking valve mounting hole, a through hole penetrating through the lower cover (9) is formed in the lower cover (9), and the through hole is opposite to the interlocking valve mounting hole; the ejector rod (11) is arranged in the through hole of the lower cover (9), and one end of the ejector rod is contacted with the second valve core (12).
2. An interlocking integrated valve according to claim 1, characterized in that the piston (3) is sealed with the piston mounting section of the power take-off switching valve mounting bore by a lip seal (4).
3. An interlocking integrated valve according to claim 1, characterized in that one end of the first valve core (6) far away from the piston (3) is provided with a blind hole, a first spring (15) is arranged in the blind hole, one end of the first spring (15) is connected with the first valve core (6), and the other end of the first spring is propped against the end part of the mounting hole of the power takeoff switching valve.
4. An interlocking integrated valve according to claim 1, characterized in that one end of the second valve core (12) far away from the ejector rod (11) is provided with a blind hole, a second spring (14) is arranged in the blind hole, one end of the second spring (14) is connected with the second valve core (12), and the other end of the second spring is propped against the end part of the interlocking valve mounting hole.
5. An interlocking integrated valve according to claim 1, characterized in that a guide sleeve (13) is provided between the second valve spool (12) and the interlocking valve mounting hole; a self-lubricating bushing (10) is arranged between the ejector rod (11) and the through hole of the lower cover (9).
6. An interlocking integrated valve according to claim 1, characterized in that the exhaust port (23) is provided with a plurality of gaskets (7), and the exhaust port (23) is provided with a dust cover (8).
7. A protection gas circuit system employing the interlock integration valve of any one of claims 1-6, comprising a gas reservoir (50), a double pneumatic control integration valve (56) and an interlock integration valve (53); the air outlet end of the air storage tank (50) is connected with an air filter (52), and the outlet of the air filter (52) is respectively connected with an air source input port (102) of the double pneumatic control integrated valve (56) and an air inlet of the interlocking integrated valve (53); the air inlet end of the air storage tank (50) is respectively connected with a first electromagnetic valve (S1) and a second electromagnetic valve (S2); the control end of the first electromagnetic valve (S1) is connected with a stopping power taking switch (K1), and the air inlet side of the first electromagnetic valve (S1) is connected with the air outlet end of the auxiliary box cylinder (54); the control end of the second electromagnetic valve (S2) is connected with a driving power take-off switch (K2), and the air inlet side of the second electromagnetic valve (S2) is connected with the air outlet end of the power take-off cylinder (55);
a pre-selection valve air inlet (101) and a pre-selection valve air outlet (41) of the double pneumatic control integrated valve (56) are respectively connected with an air inlet and an air outlet corresponding to the pre-selection valve (51); the first auxiliary cylinder exhaust port (201) and the second auxiliary cylinder exhaust port (202) of the double pneumatic control integrated valve (56) are communicated with the auxiliary tank cylinder (54); the first air outlet of the interlocking integrated valve (53) is connected with the parking power taking protection air channel air inlet (42) of the double pneumatic control integrated valve (56), and the second air outlet is connected to the air inlet side of the first electromagnetic valve (S1).
8. A method of controlling the protection gas circuit system of claim 7, comprising the steps of:
(1) When the auxiliary box is switched between high and low gears:
firstly, a high-low gear shifting head of a preselection valve is shifted to perform gear preselection operation, at the moment, the preselection valve (51) controls the valve core in the double pneumatic control integrated valve (56) to act, the position switching of the valve core is completed, and at the moment, the auxiliary box cylinder (54) does not act; then the gear lever is switched to a neutral gear, the ejector rod of the double pneumatic control integrated valve (56) returns to a free state, the air inlet is communicated with the air outlet, and the auxiliary box cylinder (54) completes switching under the action of compressed air;
(2) When the main box and the auxiliary box are protected:
in the switching process of the auxiliary box cylinder (54), the ejector rod (11) of the interlocking integrated valve (53) is in a free state, compressed air subjected to pressure reduction is filtered by the air filter (52), enters the operating interlocking cylinder through the interlocking integrated valve (53), and the gear shifting shaft is locked and cannot be engaged in a gear; when the auxiliary box cylinder (54) is switched to a position, the ejector rod (11) of the interlocking integrated valve (53) is in a compressed state, the compressed air of the interlocking cylinder is discharged to the atmosphere through the interlocking integrated valve (53), and the interlocking shaft is unlocked and can be used for engaging in a gear;
(3) When parking power take-off is performed:
the main tank is in neutral gear, a parking power taking switch is turned on, and a secondary tank cylinder (54) is switched to the neutral gear under the action of high-pressure air of the whole vehicle; the control end of the double pneumatic control integrated valve (56) is ventilated, so that the air valve keeps a low gear, and the parking power taking protection function is realized; when the pre-selection valve shifting head is switched at this time, the auxiliary box does not act, so that the synchronizer is protected; the control end of the interlocking integrated valve (53) is ventilated, compressed air is discharged through the interlocking integrated valve (53), the main box is unlocked, and at the moment, gear shifting can be achieved, and parking power taking is achieved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210737697.5A CN115182994B (en) | 2022-06-27 | 2022-06-27 | Interlocking integrated valve, protection gas circuit system and control method of protection gas circuit system |
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| CN202210737697.5A CN115182994B (en) | 2022-06-27 | 2022-06-27 | Interlocking integrated valve, protection gas circuit system and control method of protection gas circuit system |
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| CN115182994B true CN115182994B (en) | 2023-12-08 |
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