Air reset pile-up valve

Abstract

The invention provides a pneumatic reset integrated valve which comprises a valve body assembly, an ejector rod assembly and an upper valve rod assembly, and the ejector rod assembly is arranged on the valve body assembly to form an upper valve rod containing space. The valve body is provided with a valve rod cavity, the rear cover and the valve seat are arranged on openings in the two sides of the valve rod cavity, the valve rod assembly, the rear cover O-shaped ring and the return spring are arranged in the valve rod cavity, the valve rod assembly comprises a valve rod and five sealing rings arranged on the valve rod in a sleeving mode, and the end, facing the rear cover, of the valve rod is provided with a spring groove used for containing the return spring. The two ends of the return spring abut against and are connected with the bottom face of the spring groove and the rear cover respectively. The upper valve rod containing space is connected with the valve rod cavity through an air channel, and a reset air channel penetrating through the valve rod is formed in the bottom face of the spring groove and connected with the upper valve rod containing space. The normal function of controlling the on-off of an air channel is guaranteed, spring reset can be achieved through pneumatic operation, the performance of the spring is more reliable, and the service life of the spring is longer.

Description

Technical Field

[0001] This invention relates to the field of automotive devices, specifically to a structurally reliable gas reset integrated valve. Background Technology

[0002] To achieve diversified functions while considering costs, commercial vehicles use various valves to realize these functions. For example, there are directional valves, shut-off valves, and handle valves in the gear shifting system. In mechanical transmissions with a main and auxiliary gearbox structure, air valves and actuators are used when the auxiliary gearbox shifts gears. Currently, the air valves used in transmissions with a main and auxiliary gearbox structure are two-position five-way structures. Depending on the gear, the air valves are divided into mechanically controlled and pneumatically controlled types.

[0003] In the prior art, most transmission valves are dual-control integrated valves. For example, patent publication number CN 104033626B discloses a dual-control integrated valve that effectively integrates a two-position two-way mechanical control valve with a two-position five-way pneumatic control valve. However, in actual working conditions, the integrated valve relies on spring reset. Since the warranty period for automobile products is long, if the spring breaks or the force value decreases during use, it will affect the product performance.

[0004] To solve this problem, a new structure is needed to compensate for the potential risks caused by spring breakage or force decay. Summary of the Invention

[0005] To address the aforementioned shortcomings, the purpose of this invention is to provide a structurally reliable gas reset integrated valve to solve the problems of the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated valve with air reset includes a valve body assembly, a push rod assembly, and an upper valve stem assembly. The push rod assembly is disposed on the valve body assembly, and the push rod assembly and the valve body assembly form an upper valve stem receiving space. The upper valve stem assembly is disposed in the upper valve stem receiving space. The valve body assembly includes a valve body with a valve stem cavity, a rear cover and a valve seat with openings on both sides of the valve stem cavity, a valve stem assembly disposed in the valve stem cavity, a rear cover O-ring, and a return spring. The valve stem assembly includes a valve stem and five sealing rings sleeved on the valve stem. A spring groove for accommodating the return spring is formed at one end of the valve stem facing the rear cover. The two ends of the return spring abut against the bottom surface of the spring groove and the rear cover, respectively. The upper valve stem accommodating space is connected to the valve stem cavity by an air passage. A reset air passage penetrating the valve stem is formed at the bottom surface of the spring groove and connected to the upper valve stem accommodating space. An annular airtight groove is formed on the open end face of the valve stem cavity and the outer surface connected to the rear cover. An O-ring of the rear cover is set in the annular airtight groove to prevent gas from leaking from the surface where the valve stem cavity and the rear cover are connected.

[0008] According to the air reset integrated valve of the present application embodiment, the valve body assembly further includes a piston and a piston V-ring, the piston and piston V-ring being disposed in the valve seat.

[0009] According to the embodiments of this application, the air reset integrated valve is characterized in that the valve body has an air passage connecting to the first air inlet of the upper valve stem accommodating space, and the upper valve stem assembly is used to open and close the airflow of the first air inlet.

[0010] According to the air reset integrated valve described in the embodiments of this application, the upper valve stem assembly includes a spring, a lower stop block, a middle partition sleeve, two upper valve stem O-rings, an upper stop block, and an upper valve stem, wherein,

[0011] The upper valve stem has a spring groove at one end facing the valve stem cavity, and the other end of the upper valve stem is connected to the top rod assembly. One end of the spring is located in the spring groove, and the other end of the spring is connected to the bottom surface of the upper valve stem accommodating space. The lower stop block, upper valve stem O-ring, middle partition sleeve, upper valve stem O-ring, and upper stop block are sequentially arranged in the upper valve stem accommodating space. The vent hole of the middle partition sleeve corresponds to the position of the first air inlet for gas flow. The upper stop block is a hollow cylinder with a radially protruding fixing part on one end face. The two sides of the fixing part are respectively connected to the valve body and the top rod assembly. The upper valve stem sequentially passes through the lower stop block, upper valve stem O-ring, middle partition sleeve, upper valve stem O-ring, and upper stop block, and the upper valve stem has an air inlet passage.

[0012] According to the air reset integrated valve of the present application embodiment, the push rod assembly includes a push rod seat, a push rod, a push rod seat O-ring, and a steel sleeve. The push rod seat is a hollow cylinder with a radially protruding fixed flange on one end face. The fixed flange of the push rod seat is connected to the valve body via a screw. The inner edge of the hollow cylinder of the push rod seat includes a radially inwardly stepped portion. The push rod seat O-ring and steel sleeve are sequentially disposed within the hollow cylinder of the push rod seat and sequentially abut against the stepped portion. The end of the push rod facing the upper valve stem includes a push rod flange. The diameter of the push rod flange is larger than the diameter of the stepped portion. The push rod passes through and connects the push rod seat O-ring and steel sleeve. The two end faces of the push rod flange are respectively connected to the bottom surface of the stepped portion and the end face of the upper valve stem.

[0013] According to the air reset integrated valve described in the embodiments of this application, the valve body has a third air inlet corresponding to the position of the piston; the valve body also has a first working port, a second working port, a first exhaust port and a second exhaust port, and the first working port, the second working port, the first exhaust port and the second exhaust port are respectively connected to the valve stem cavity by air passage.

[0014] According to the gas reset integrated valve described in the embodiments of this application, an exhaust cap and an exhaust gasket are connected to the openings of the first exhaust port and the second exhaust port.

[0015] The design concept of this application is to design an integrated valve with a pneumatic reset structure that is superior to existing integrated valves. This integrated valve can not only ensure the normal control of the air circuit opening and closing function, but also rely on pneumatics to achieve spring reset, making the spring performance more reliable and its service life longer.

[0016] Due to the adoption of the above technical features, this invention has the following advantages and positive effects compared with the prior art:

[0017] First, the integrated valve of this application can not only ensure the normal control of the air circuit opening and closing function, but also rely on pneumatics to realize the spring reset, making the spring performance more reliable and its service life longer.

[0018] Of course, implementing any specific embodiment of the present invention does not necessarily have all of the above technical effects at the same time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the appearance of the gas reset integrated valve of this application;

[0020] Figure 2 This is a cross-sectional schematic diagram of the gas reset integrated valve of this application;

[0021] Figure 3 This is another cross-sectional view of this application;

[0022] Figure 4 This is a schematic cross-sectional view of the valve body of this application;

[0023] Figure 5 This is a schematic diagram of the gas reset gas path in this application;

[0024] Figure 6 This is a schematic diagram of the valve stem assembly in this application;

[0025] Figure 7 This is a schematic diagram of the push rod assembly of this application. Detailed Implementation

[0026] The following describes several preferred embodiments of the present invention in detail with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To provide the public with a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments, but those skilled in the art will fully understand the present invention without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of the present invention, well-known methods, processes, procedures, elements, etc., are not described in detail.

[0027] Please refer to Figure 1 This application presents a schematic diagram of the appearance of the air-reset integrated valve. The air-reset integrated valve of this application is used in commercial vehicles to achieve diversified functions, such as directional valves, shut-off valves, and handle valves in gear shifting systems, or mechanical transmissions with a main and auxiliary gearbox structure. When the auxiliary gearbox shifts gears, an air valve and actuator are used. The structure of the air-reset integrated valve of this application is superior to that of existing integrated valves. It can not only ensure the normal control of air circuit opening and closing functions, but also rely on pneumatics to achieve spring reset. The pneumatically assisted spring operation makes the spring performance more reliable and its service life longer.

[0028] Please refer to Figure 2 This application presents a cross-sectional schematic diagram of an integrated valve with a gas reset mechanism. The integrated valve includes a valve body assembly 10, a push rod assembly 30, and an upper valve stem assembly 20. The push rod assembly 30 is disposed on the valve body assembly 10, and the push rod assembly 30 and the valve body assembly 10 form an upper valve stem receiving space 29. The upper valve stem assembly 20 is disposed within the upper valve stem receiving space 29. Please refer to [reference needed]. Figure 4 The valve body assembly 10 includes a valve body 11 with a valve stem cavity, a rear cover 12 and a valve seat 13 with openings on both sides of the valve stem cavity, a valve stem assembly 14 disposed in the valve stem cavity, a rear cover O-ring 15 and a return spring 16, and the rear cover 12 and the valve seat 13 are respectively connected to the two openings of the valve stem cavity by screw fastening.

[0029] Figure 5In the valve stem assembly 14, there are valve stems 141 and five sealing rings 142 sleeved on the valve stems 141. The five sealing rings 142 form two working air passages in the valve stem cavity that prevent air leakage. The valve stem 141 has a spring groove at one end facing the rear cover 12 for accommodating the return spring 16. The two ends of the return spring 16 abut against the bottom surface of the spring groove and the rear cover 12, respectively. Figure 2 In the middle, the return spring 16 is in a relaxed state, pushing the valve stem 141 to the leftmost position. Figure 3 In the middle, the return spring 16 is in its maximum compressed state. The relaxed state mentioned here means that the pressure of the return spring 16 is not as high as in the compressed state, but it is not completely stretched. The upper valve stem accommodating space 29 is connected to the valve stem cavity by an air passage. The bottom surface of the spring groove has a reset air passage 1411 that penetrates the valve stem 141 and is connected to the upper valve stem accommodating space 29. Figure 5 As shown by the middle arrow, the reset air passage 1411, which penetrates the valve stem 141, is formed by extending from the surface toward the center of the valve stem 141 and then axially toward the bottom of the spring groove from the position of the air passage corresponding to the upper valve stem accommodating space 29; as shown by the middle arrow. Figure 4 As shown, an annular airtight groove is formed on the open end face of the valve stem cavity and the outer surface of the connection between the valve stem cavity and the rear cover 12. The O-ring 15 of the rear cover is disposed in the annular airtight groove to prevent gas leakage from the surface where the valve body 11 and the rear cover 12 are connected. As described above, the pressurized gas in the reset gas path 1411 comes from the upper valve stem accommodating space 29 to the rear cover 12. Therefore, the gas pressure in the groove of the rear cover 12 is greater than the gas pressure in the prior art without the reset gas path 1411. Therefore, the O-ring 15 of the rear cover can improve the airtight performance of the rear cover 12. During gas reset, if Figure 5 As shown, the groove of the rear cover 12 is filled with pressurized gas, and all parts are affected by the gas pressure. However, the valve stem 141 is a movable part and is pushed to the left by the gas pressure to achieve gas reset, while other parts are fixed parts and will not be pushed.

[0030] Please refer to Figure 4The valve body assembly 10 further includes a piston 17 and a piston V-ring 18. The piston 17 and piston V-ring 18 are disposed in the valve seat 13, and the piston 17 is fixedly connected to the valve stem 141. The piston 17 moves to the right under the influence of air pressure and moves to the left under the influence of spring force and air pressure to change the working port. The piston V-ring 18 is sleeved on the piston 17 for airtightness. In addition, the valve body 11 has an air passage connecting to the first air inlet 1 of the upper valve stem accommodating space 29. The upper valve stem assembly 20 is used to open and close the airflow of the first air inlet 1. The air pressure entering the upper valve stem accommodating space 29 from the first air inlet 1 is the working air pressure. After entering from the first air inlet 1, the working air pressure passes through the upper valve stem assembly 20 and the upper valve stem accommodating space 29, enters the valve stem cavity, and then exits from the working port. Figure 4 In the valve body 11, a second air inlet 2 is also provided, which is a backup air inlet.

[0031] Please refer to Figure 6 The upper valve stem assembly 20 includes a spring 27, a lower stop block 28, a middle spacer 23, two upper valve stem O-rings 24, an upper stop block 25, and an upper valve stem 26. The upper valve stem 26 has a spring groove at one end facing the valve stem cavity, and the other end of the upper valve stem 26 is connected to the top rod assembly 30. One end of the spring 27 is disposed in the spring groove, and the other end of the spring 27 is connected to the bottom surface of the upper valve stem accommodating space 29. After assembly, The spring force of the spring 27 presses the upper valve stem 26 against the push rod assembly 30, and when the push rod assembly 30 presses down on the upper valve stem 26, the spring 27 is in a compressed state. When the downward pressure from the push rod assembly 30 disappears, the spring 27 springs the upper valve stem 26 upward. The lower stop 28, upper valve stem O-ring 24, intermediate sleeve 23, upper valve stem O-ring 24, and upper stop 25 are sequentially arranged in the upper valve stem accommodating space 29. The intermediate sleeve 23 allows for ventilation. The hole corresponds to the position of the first air inlet 1 for gas flow; the upper stop block 25 is a hollow cylinder with a radially protruding fixing part on one end face. The two sides of the fixing part are respectively connected to the valve body 11 and the push rod assembly 30. The valve body 11 and the push rod assembly 30 fix the upper stop block 25. The upper stop block 25 is located at the opening to limit the lower stop block 28, the two upper valve rod O-rings 24, and the intermediate sleeve 23; the upper valve rod 26 sequentially passes through... Connecting the lower stop block 28, the upper valve stem O-ring 24, the middle partition sleeve 23, the upper valve stem O-ring 24, and the upper stop block 25, the upper valve stem 26 can move smoothly within the lower stop block 28, the two upper valve stem O-rings 24, and the middle partition sleeve 23. The upper valve stem 26 has an air inlet passage. When the air inlet passage corresponds to the vent hole of the middle partition sleeve 23, the working air pressure can enter the upper valve stem accommodating space 29, and the air passage is cut off after the upper valve stem 26 moves downward.

[0032] Please refer to Figure 7 The push rod assembly 30 includes a push rod seat 33, a push rod 34, a push rod seat O-ring 35, and a steel sleeve 36. The push rod seat 33 is a hollow cylinder with a radially protruding fixing flange 331 on one end face, and the surface of the push rod seat 33 is anodized. The fixing flange 331 of the push rod seat 33 is connected to the valve body 11 by a screw. The inner edge of the hollow cylinder of the push rod seat 33 includes a radially inward second-step portion 332. The push rod seat O-ring 35 and the steel sleeve 36 are sequentially arranged in the hollow cylinder of the push rod seat 33 and sequentially abut against the second-step portion 332. Figure 7 As shown, the O-ring 35 of the push rod seat is located below the steel sleeve 36. The O-ring 35 of the push rod seat and the steel sleeve 36 respectively abut against a step of the second-step portion 332. After assembly, the outer edge of the steel sleeve 36 is interference-fitted to the inner edge of the cylinder of the push rod seat 33, limiting the O-ring 35 of the push rod seat. The O-ring 35 of the push rod seat is used to prevent airflow from leaking from the upper valve stem accommodating space 29. The end of the push rod 34 facing the upper valve stem 26 includes a push rod flange 341. The straight end of the push rod flange 341... The diameter is larger than the diameter of the second-step portion 332. After assembly, when the push rod 34 is pushed upward by the upper valve stem 26, it can be limited by the second-step portion 332 to prevent it from being pushed out of the push rod seat 33. The push rod 34 passes through and connects the O-ring 35 and the steel sleeve 36 of the push rod seat. The two end faces of the push rod flange 341 are respectively connected to the bottom surface of the second-step portion 332 and the end face of the upper valve stem 26. The push rod 34 is used to press down the upper valve stem 26 to close the airflow of the first air inlet 1 into the upper valve stem accommodating space 29.

[0033] Please refer to Figure 1 and Figure 4 The valve body 11 has a third air inlet 4 at the position corresponding to the piston 17, which is used to push the piston 17 to change the working port of the airflow. That is, the third air inlet 4 is a control port. The valve body 11 also has a first working port 21, a second working port 22, a first exhaust port 31 and a second exhaust port 32. The first working port 21, the second working port 22, the first exhaust port 31 and the second exhaust port 32 are respectively connected to the valve stem cavity by air passage. In addition, the openings of the first exhaust port 31 and the second exhaust port 32 are connected to the exhaust cap 51 and the exhaust gasket 52.

[0034] As described above, this application combines a mechanical shut-off valve and a pneumatic directional valve into an integrated valve, and provides an air passage to assist the return spring 16 in pushing the valve stem 141. The working principle of this integrated valve is as follows:

[0035] 1. When the push rod 34 is in the extended state (not cut off),

[0036] The third air inlet 4 is used for ventilation, the valve stem 141 is located on the right side, the first air inlet 1 is connected to the first working port 21; the second exhaust port 32 exhausts air.

[0037] The third air inlet 4 is not open to air. The valve stem 141 is pushed from the right to the left by the spring force of the return spring 16 and the air pressure of the reset air passage 1411. The first air inlet 1 is connected to the second working port 22, and the first exhaust port 31 exhausts air.

[0038] 2. When the push rod 34 is in the pressed-in state (cut off), regardless of whether the third air inlet 4 is ventilated or not, the first working port 21 and the second working port 22 are not ventilated.

[0039] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] In summary, due to the adoption of the above technical features, the present invention has the following advantages and positive effects compared with the prior art:

[0041] First, the integrated valve of this application can not only ensure the normal control of the air circuit opening and closing function, but also rely on pneumatics to realize the spring reset, making the spring performance more reliable and its service life longer.

[0042] The preferred embodiments of the invention are merely illustrative of the invention. They do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. These embodiments have been selected and specifically described in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to make good use of the invention. The invention is limited only by the claims and their full scope and equivalents. The above disclosures are merely preferred embodiments of the invention, but are not intended to limit it. Any equivalent changes and modifications made by those skilled in the art without departing from the spirit and essence of the invention should fall within the protection scope of the invention.

Claims

1. A pneumatic reset integrated valve, characterized in that, The integrated valve includes a valve body assembly, a push rod assembly, and an upper valve stem assembly. The push rod assembly is disposed on the valve body assembly, and the push rod assembly and the valve body assembly form an upper valve stem receiving space. The upper valve stem assembly is disposed in the upper valve stem receiving space. The valve body assembly includes a valve body with a valve stem cavity, a rear cover and a valve seat with openings on both sides of the valve stem cavity, a valve stem assembly disposed in the valve stem cavity, a rear cover O-ring, and a return spring. The valve stem assembly includes a valve stem and five sealing rings sleeved on the valve stem. A spring groove for accommodating the return spring is formed at one end of the valve stem facing the rear cover. The two ends of the return spring abut against the bottom surface of the spring groove and the rear cover, respectively. The upper valve stem accommodating space is connected to the valve stem cavity by an air passage, and the bottom surface of the spring groove is provided with a reset air passage that penetrates the valve stem and is connected to the upper valve stem accommodating space. An annular airtight groove is formed on the open end face of the valve stem cavity and the outer surface of the connection between the valve stem cavity and the rear cover. The O-ring of the rear cover is set in the annular airtight groove to prevent gas from leaking from the surface of the connection between the valve stem cavity and the rear cover.

2. The gas reset integrated valve as described in claim 1, characterized in that, The valve body assembly also includes a piston and a piston V-ring, which are disposed in the valve seat.

3. The gas reset integrated valve as described in claim 1, characterized in that, The valve body has an air passage connecting to the first air inlet of the upper valve stem accommodating space, and the upper valve stem assembly is used to open and close the airflow of the first air inlet.

4. The gas reset integrated valve as described in claim 3, characterized in that, The upper valve stem assembly includes a spring, a lower stop block, a central spacer, two upper valve stem O-rings, an upper stop block, and an upper valve stem. The upper valve stem has a spring groove at one end facing the valve stem cavity, and the other end of the upper valve stem is connected to the top rod assembly. One end of the spring is located in the spring groove, and the other end of the spring is connected to the bottom surface of the upper valve stem accommodating space. The lower stop block, upper valve stem O-ring, middle partition sleeve, upper valve stem O-ring, and upper stop block are sequentially arranged in the upper valve stem accommodating space. The vent hole of the middle partition sleeve corresponds to the position of the first air inlet for gas flow. The upper stop block is a hollow cylinder with a radially protruding fixing part on one end face. The two sides of the fixing part are respectively connected to the valve body and the top rod assembly. The upper valve stem sequentially passes through the lower stop block, upper valve stem O-ring, middle partition sleeve, upper valve stem O-ring, and upper stop block, and the upper valve stem has an air inlet passage.

5. The gas reset integrated valve as described in claim 4, characterized in that, The push rod assembly includes a push rod seat, a push rod, a push rod seat O-ring, and a steel sleeve. The push rod seat is a hollow cylinder with a radially protruding fixed flange on one end face. The fixed flange of the push rod seat is connected to the valve body by a screw. The inner edge of the hollow cylinder of the push rod seat includes a radially inward second-step portion. The push rod seat O-ring and steel sleeve are sequentially arranged in the hollow cylinder of the push rod seat and sequentially abut against the second-step portion. The end of the push rod facing the upper valve stem includes a push rod flange. The diameter of the push rod flange is larger than the diameter of the second-step portion. The push rod passes through and connects the push rod seat O-ring and steel sleeve. The two end faces of the push rod flange are respectively connected to the bottom surface of the second-step portion and the end face of the upper valve stem.

6. The gas reset integrated valve as described in claim 2, characterized in that, The valve body has a third air inlet corresponding to the position of the piston; the valve body also has a first working port, a second working port, a first exhaust port and a second exhaust port, and the first working port, the second working port, the first exhaust port and the second exhaust port are respectively connected to the valve stem cavity by air passages.

7. The gas reset integrated valve as described in claim 6, characterized in that, An exhaust cap and an exhaust gasket are connected to the openings of the first and second exhaust ports.

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