Transmission integrated valve and transmission assembly

Abstract

The utility model relates to vehicle technical field especially, and it is a kind of transmission integrated valve and transmission assembly.The air hole of first valve stem of transmission integrated valve is used to make gas source import selectively with low-grade air outlet, high-grade air outlet and gas source outlet lead through or cut off, and the movement of the protrusion on second valve stem is selectively used to open low-grade air outlet or high-grade air outlet, first valve stem and second valve stem are mutually matched, can avoid the sub-tank of gearbox to enter gas when not working, and then improve the gas circuit switching stability of transmission integrated valve.Valve bushing is provided with the connecting hole of direct connection with the air hole of valve stem, and the gas circuit communication efficiency can be optimized.The valve stem provided by the utility model is of split structure, compared with integrated structure, the valve stem provided by the utility model is simple in structure, high in reliability and easy to install.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a transmission integrated valve and transmission assembly. Background Technology

[0002] In the field of auxiliary gearbox shift control in commercial vehicle transmissions, traditional pneumatic systems generally adopt a design architecture where a separate follow-up valve and a control valve work together. The follow-up valve primarily handles the precise control of the auxiliary gearbox's pneumatic circuit based on the master gearbox's gear position signal; the control valve, on the other hand, uses commands from the gear shift lever to switch between high and low gear pneumatic circuits in the auxiliary gearbox. While this division of labor achieves basic shifting functionality, this separate layout reveals numerous drawbacks. The large number of components and the intertwined pneumatic lines result in a highly complex pneumatic structure, increasing manufacturing difficulty and cost, and making installation and debugging cumbersome and time-consuming. Furthermore, the combination of numerous components reduces the overall reliability of the system, making it prone to malfunctions during actual operation, which severely impacts the shifting performance of the entire transmission and fails to meet the demands of efficient and stable operation in commercial vehicles.

[0003] Therefore, there is an urgent need for an integrated valve for transmissions to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to propose an integrated valve for a transmission and a transmission assembly, which has a simple structure and reduced assembly difficulty.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a transmission integrated valve is provided, comprising:

[0007] The valve body has a valve hole. The side wall of the valve body is provided with an air source inlet, an air source outlet, a handle return air port, a low-gear air outlet, and a high-gear air outlet. The air source inlet, air source outlet, handle return air port, low-gear air outlet, and high-gear air outlet are all connected to the valve hole. The air source outlet is used to connect with the handle air inlet of the handle, and the handle return air port is used to connect with the handle air inlet.

[0008] A valve stem, located within the valve orifice, comprises a first valve stem and a second valve stem. The first valve stem is provided with a vent hole, which is used to selectively connect or disconnect the gas source inlet with the low-grade gas outlet, the high-grade gas outlet, and the gas source outlet. One end of the second valve stem is provided with a first groove, and the outer peripheral wall of the second valve stem is provided with an annular protrusion. The annular protrusion moves to allow the valve orifice to selectively connect with the low-grade gas outlet or the high-grade gas outlet.

[0009] A valve sleeve is located inside the valve hole. The valve sleeve is provided with a connection hole that communicates with the gas source inlet and the gas source outlet. The first end of the first valve stem is located inside the valve sleeve and can slide along the valve sleeve axially to block or open the connection hole.

[0010] As an optional technical solution for the aforementioned integrated valve for the transmission, the valve body is further provided with an exhaust plug, which is disposed on the valve body to connect the valve hole with the outside, and the exhaust plug is disposed on both sides of the annular protrusion.

[0011] As an optional technical solution for the aforementioned integrated transmission valve, the integrated transmission valve further includes a piston assembly, which is mounted on the valve body and connected to the second valve stem to push the second valve stem to move.

[0012] As an optional technical solution for the aforementioned integrated transmission valve, the integrated transmission valve further includes a valve cover, which is located on both sides of the second valve stem, along with the piston assembly.

[0013] As an optional technical solution for the aforementioned integrated valve for the transmission, a first spring is provided in the valve body, the first spring abutting against the wall of the valve hole, and the other end is installed in the first groove of the second valve stem.

[0014] As an optional technical solution for the aforementioned integrated valve for the transmission, a second spring is provided inside the valve body. The second spring is located inside the valve hole, with one end of the second spring abutting against the wall of the valve hole and the other end abutting against the first end of the first valve stem.

[0015] As an optional technical solution for the aforementioned integrated transmission valve, the integrated transmission valve further includes a stop block located at one end of the valve sleeve away from the valve body. The valve orifice has a first stepped surface and a second stepped surface. The stop block is located inside the valve orifice and abuts against the first stepped surface, while the second stepped surface abuts against the second spring.

[0016] As an optional technical solution for the aforementioned integrated valve for the transmission, there are multiple connecting holes and multiple vent holes. The multiple connecting holes are arranged circumferentially along the valve sleeve, and the multiple vent holes are arranged circumferentially along the first valve stem.

[0017] As an optional technical solution for the aforementioned integrated valve for the transmission, the connecting holes are evenly distributed along the circumference of the valve sleeve, and the vent holes are evenly distributed along the circumference of the first valve stem.

[0018] As an optional technical solution for the aforementioned integrated transmission valve, the integrated transmission valve further includes a push rod and a push rod seat. The push rod seat is provided with a mounting hole and is fixedly connected to the valve body. The mounting hole communicates with the valve hole. The push rod is installed in the mounting hole. One end of the push rod is fixedly connected to the first valve stem, and the other end of the push rod is located outside the push rod seat. The push rod can move axially along the mounting hole.

[0019] In a second aspect, a transmission assembly is provided, including a transmission main housing, a transmission auxiliary housing, and a transmission integrated valve as described in any of the above embodiments, wherein the transmission auxiliary housing is connected to the transmission integrated valve.

[0020] This utility model has at least the following beneficial effects:

[0021] The vent hole of the first valve stem is used to selectively connect or disconnect the air source inlet with the low-grade air outlet, the high-grade air outlet, and the air source outlet. The movement of the protrusion on the second valve stem selectively opens the low-grade or high-grade air outlet. The first and second valve stems work together to prevent gas from entering the transmission's auxiliary gearbox when it is not in operation, thereby improving the stability of the air path switching of the transmission integrated valve. The valve sleeve is provided with a connection hole directly connected to the vent hole of the valve stem, which optimizes the air path connection efficiency. The valve stem provided by this invention has a split structure. Compared with an integrated structure, the valve stem structure provided by this invention is simpler, more reliable, and easier to install. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 A front view of the integrated transmission valve provided in an embodiment of this utility model;

[0024] Figure 2 Rear view of the integrated transmission valve provided in an embodiment of this utility model;

[0025] Figure 3 A cross-sectional view of the integrated valve for a transmission provided in an embodiment of this utility model;

[0026] Figure 4 A sectional view of the valve body provided for an embodiment of this utility model;

[0027] Figure 5 A front view of the valve sleeve provided in an embodiment of this utility model;

[0028] Figure 6 A cross-sectional view of the second valve stem provided in an embodiment of this utility model;

[0029] Figure 7 A cross-sectional view of the first bend pipe joint assembly provided in an embodiment of this utility model;

[0030] Figure 8 A cross-sectional view of the first straight-through pipe connector assembly provided in an embodiment of this utility model.

[0031] In the picture:

[0032] 1. Valve body; 11. Valve hole; 111. First stepped surface; 112. Second stepped surface; 12. Air source inlet; 13. Air source outlet; 14. Handle return port; 15. Low-range air outlet; 16. High-range air outlet; 17. First bend pipe connector assembly; 18. First straight pipe connector assembly; 19. Inner hole; 120. Second bend pipe connector assembly; 121. Second straight pipe connector assembly; 122. Third straight pipe connector assembly; 21. First valve stem; 22. Second valve stem; 221. First groove; 222. Annular protrusion; 3. Valve sleeve; 31. Connecting hole; 4. Exhaust plug; 5. Piston assembly; 51. Piston; 52. Piston cylinder; 53. U-shaped sealing ring; 6. Valve cover; 71. First spring; 72. Second spring; 8. Stop block; 81. First sealing structure; 9. Push rod; 10. Push rod seat; 102. Cylinder ring; 103. Second sealing structure. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This invention provides an integrated valve for a transmission, which has a simple structure and reduced assembly difficulty.

[0038] like Figures 1 to 5 As shown, the transmission integrated valve includes a valve body 1, a valve stem, and a valve sleeve 3. The valve body 1 has a valve hole 11. The side wall of the valve body 1 is provided with an air source inlet 12, an air source outlet 13, a handle return air port 14, a low-gear air outlet 15, and a high-gear air outlet 16. The air source inlet 12, air source outlet 13, low-gear air outlet 15, and high-gear air outlet 16 are all connected to the valve hole 11. The valve stem is located inside the valve hole 11. The air source outlet 13 is used to connect with the handle air inlet of the handle, and the handle return air port 14 is used to connect with the handle air inlet. The valve stem, located inside the valve hole 11, includes a first valve stem 21 and a second valve stem 22. The first valve stem 21 is provided with a vent. The vent hole is used to selectively connect or disconnect the air source inlet 12 with the low-grade air outlet 15, the high-grade air outlet 16, and the air source outlet 13. One end of the second valve stem 22 is provided with a first groove 221, and the outer peripheral wall of the second valve stem 22 is provided with an annular protrusion 222. The annular protrusion 222 can move to allow the valve hole 11 to selectively connect with the low-grade air outlet 15 or the high-grade air outlet 16. The valve sleeve 3 is located inside the valve hole 11 and is provided with a connecting hole 31 that connects to the air source inlet 12 and the air source outlet 13. The first end of the first valve stem 21 is located inside the valve sleeve 3 and can slide along the axial direction of the valve sleeve 3 to block or open the connecting hole 31.

[0039] The vent hole of the first valve stem 21 is used to selectively connect or cut off the air source inlet 12 with the low - gear air outlet 15, the high - gear air outlet 16 and the air source outlet 13. The movement of the protrusion 222 on the second valve stem 22 can selectively open the low - gear air outlet 15 or the high - gear air outlet 16. The first valve stem 21 and the second valve stem 22 cooperate with each other to prevent gas from entering the auxiliary box of the gearbox when it is not working, thereby improving the stability of the air - path switching of the transmission integrated valve. The valve sleeve 3 is provided with a connection hole 31 directly connected to the vent hole of the valve stem, which can optimize the air - path connection efficiency. The valve stem provided by the present utility model has a split - type structure. Compared with the integral structure, the valve stem structure provided by the present utility model is simple, has high reliability and is easy to install.

[0040] In addition, both the first valve stem 21 and the second valve stem 22 have a solid rod body at one end and a hollow tubular structure at the other end. The hollow tubular structure of the first valve stem 21 is also provided with a vent hole to serve as a key channel for gas conduction. The valve body 1 is overall in a symmetric structure.

[0041] In the natural state of the second valve stem 22, the annular protrusion 222 is located between the port of the first valve hole 11 and the low - gear air outlet 15, so that the first valve hole 11 is connected to the high - gear air outlet 16. The second valve stem 22 is in a "middle" shape. The second valve stem 22 has a simple structure, high reliability and is easy to install.

[0042] The transmission integrated valve further includes a piston assembly 5 and a valve cover 6. The piston assembly 5 and the valve cover 6 are installed on the valve body 1, and the piston assembly 5 and the valve cover 6 are located at both ends of the second valve stem 22. The valve cover 6 abuts against the first spring 71. The piston assembly 5 is installed in the second valve hole 11. The piston assembly 5 is sealed with a U - shaped sealing ring 53. It has a simple structure, is easy to manufacture, has a low cost, has good sealing performance and a long service life. Specifically, the piston assembly 5 includes a piston 51 and a piston cylinder 52. The piston 51 is located inside the piston cylinder 52. The second valve stem 22 extends into the piston cylinder 52 and is fixedly connected to the piston 51. In this way, the piston 51 moves inside the piston cylinder 52 to push the second valve stem 22 to move. A U - shaped sealing ring 53 is provided between the piston 51 and the piston cylinder 52 for sealing.

[0043] In order to discharge the excess gas in the auxiliary box through the high - gear air outlet 16 when the auxiliary box is not working, in some embodiments, as Figure 2 shown, the valve body 1 is further provided with an exhaust plug 4. The exhaust plug 4 is arranged on the valve body 1 to connect the valve hole 11 with the outside, and the exhaust plug 4 is arranged on both sides of the annular protrusion. When the air pressure in the second valve hole 11 exceeds the preset value of the exhaust plug 4, the exhaust plug 4 is opened so that the gas in the auxiliary box is released from the exhaust plug 4 to the atmosphere. Four inner holes 19 for connecting vent plugs are symmetrically opened on the valve body 1, and the inner holes 19 are connected to the second valve hole 11.

[0044] As Figure 3As shown, in some embodiments, in order to restore the valve body 1 to its initial position, a first spring 71 is provided inside the valve body 1. The first spring 71 abuts against the wall of the valve hole 11, and its other end is installed in the first groove 221 of the second valve stem 22. Specifically, the first spring 71 is used to restore the second valve stem 22 to its original position.

[0045] In some embodiments, a second spring 72 is provided inside the valve body 1. The second spring 72 is located inside the valve hole 11, with one end abutting against the wall of the valve hole 11 and the other end abutting against the first end of the first valve stem 21. In this way, under the action of the second spring 72, the first valve stem 21 can return to its original position, and the second spring 72 can provide support force for the first valve stem 21 to ensure that the connecting hole 31 is connected to the ventilation hole.

[0046] In some embodiments, to limit and seal the valve sleeve 3, the transmission integrated valve further includes a stop 8. The stop 8 is located at the end of the valve sleeve 3 opposite to the valve body 1 and is located inside the valve hole 11. A first sealing structure 81 is provided between the stop 8 and the valve sleeve 3. In this way, the first sealing structure 81 can seal between the valve sleeve 3 and the valve body 1 to prevent air leakage, while the stop 8 can limit the valve sleeve 3 and the first sealing structure 81 to prevent them from moving axially along the first valve hole 11. The stop 8 has a circular structure, which is simple in structure and easy to manufacture. It should be noted that the stop 8 and the valve sleeve 3 simplify the assembly process and reduce the risk of leakage; the flattened structure of the valve body 1 reduces the processing difficulty, reduces production costs, and improves the overall sealing reliability.

[0047] To limit the movement of the stop block 8, the first spring 71, and the second spring 72, the valve hole 11 has a first stepped surface 111 and a second stepped surface 112. The stop block 8 is located inside the valve hole 11 and abuts against the first stepped surface 111, thus limiting the stop block 8. The second stepped surface 112 abuts against the second spring 72 to limit the movement of the second spring 72. Specifically, the first valve hole 11 has a first stepped surface 111 and a second stepped surface.

[0048] The transmission integrated valve achieves multi-channel gas distribution and switching through valve port 11. An air filter is connected to the air source inlet 12 of the valve body 1, and the filter is connected to the first elbow connector assembly 17 via an installation at the air source outlet 13. The structure of the first elbow connector assembly 17 is as follows: Figure 7 As shown, the air source outlet 13 is directly connected to the external air filter, and the air source outlet 13 serves as the main input port of the transmission integrated valve; the air source outlet 13 is equipped with a first through pipe connector assembly 18 (such as...). Figure 8As shown, the valve body 1 is connected to the air inlet of the shift lever via a pipeline, forming the main air path for lever control. The lever return air port 14 of the valve body 1 is equipped with a second bent pipe connector assembly 120, used to receive the air pressure signal fed back after the shift lever is actuated. The bottom of the valve body 1 has symmetrically arranged low-gear air outlet 15 and high-gear air outlet 16. The low-gear air outlet 15 is equipped with a second straight-through pipe connector assembly 121, and the high-gear air outlet 16 is equipped with a third straight-through pipe connector assembly 122. The second straight-through pipe connector assembly 121 and the third straight-through pipe connector assembly 122 respectively connect to the low-gear and high-gear air chambers of the transmission auxiliary gearbox actuator. Inside the valve body 1, a cross-layer communication structure is formed through a precisely designed first valve hole 11 and second valve hole 11, constituting the core path for pneumatic signal transmission. Two independent exhaust plugs 4 are symmetrically installed in the area near the low-gear air outlet 15 and the high-gear air outlet 16 at the lower part of the valve body 1. During gear shifting, residual gas in the non-working side air path flows back into the valve body 1 through the corresponding air outlet and is quickly discharged into the atmosphere through the directional pressure relief channel of the exhaust plug 4, eliminating the interference of reverse air pressure on the gear shifting action.

[0049] It should be noted that the first straight pipe connector assembly 18, the second straight pipe connector assembly 121 and the third straight pipe connector assembly 122 have the same structure, and the first bend pipe connector assembly 17 and the second bend pipe connector assembly 120 have the same structure.

[0050] In some embodiments, there are multiple connecting holes 31 and multiple vent holes. The multiple connecting holes 31 are arranged circumferentially along the valve sleeve 3, and the multiple vent holes are arranged circumferentially along the first valve stem 21. It should be noted that the number of vent holes is the same as the number of connecting holes 31, and the vent holes and connecting holes 31 are arranged in a one-to-one correspondence. It can be understood that each vent hole has a connecting hole 31 communicating with it, so that gas can enter the valve hole 11.

[0051] For example, such as Figure 5 As shown, the connecting holes 31 are evenly distributed along the circumference of the valve sleeve 3, and the vent holes are evenly distributed along the circumference of the first valve stem 21. This ensures that gas enters the valve core evenly, thereby stabilizing the gas pressure throughout the valve body 1.

[0052] In some embodiments, such as Figure 3As shown, the transmission integrated valve also includes a push rod 9, a steel ring 102, and a push rod seat 10. The push rod seat 10 has a mounting hole, and the steel ring 102 is located inside the mounting hole and is fitted onto the push rod 9. The steel ring 102 is wear-resistant and can prevent the push rod 9 from rubbing against the push rod seat 10 during axial movement, thus preventing wear. The push rod seat 10 is fixedly connected to the valve body 1, and the mounting hole communicates with the valve hole 11. One end of the push rod 9 is fixedly connected to the first valve stem 21, and the other end of the push rod 9 is located outside the push rod seat 10. The push rod 9 can move axially along the mounting hole. A second sealing structure 103 is provided between the push rod 9 and the push rod seat 10. The push rod 9 provides a force for the valve core to move towards the second spring 72, so that the auxiliary gearbox is in a non-working state when the main gearbox of the transmission is working. It should be noted that the push rod 9 is rigidly connected to the first valve stem 21 to improve the stability of the connection between the push rod 9 and the first valve stem 21. In addition, the force received by the push rod 9 is directly transmitted to the first valve stem 21 so that the first valve stem 21 can respond and act in a timely manner.

[0053] The first valve stem 21 is elastically connected to the valve body 1 via the second spring 72. Under normal conditions, the first valve stem 21 is kept in an upward state by the tension of the second spring 72. When an external air source is injected from the air source inlet 12, if the push rod 9 is pressed down by an external force (such as the main gearbox shift trigger mechanism), it will drive the first valve stem 21 to compress the second spring 72 and move downward. At this time, the vent hole of the lower section of the first valve stem 21 is sealed by the inner wall of the valve body 1, completely blocking the transmission of gas to the handle and the auxiliary gearbox air path. Conversely, when the push rod 9 moves upward and resets, the connecting hole 31 is aligned with the vent hole of the first valve stem 21, and the gas can flow to the handle air outlet and the shift execution area at the bottom of the valve body 1 (i.e., the second valve stem 22) at the same time.

[0054] The right side of the second valve stem 22 is designed as a hollow section, meaning the second valve stem 22 has a second groove. Part of the first spring 71 is located within the second groove. The valve body 1 has a valve cover 6, and the first spring 71 and the valve cover 6 form a reset mechanism, meaning the first spring 71 abuts against the valve cover 6. A piston is also installed inside the second valve hole 11, forming an air intake section between the piston and the valve body 1. This air intake end is connected to the shift lever return air port 14 via a pipe connector. When the driver operates the shift lever, the air pressure signal is introduced into the air intake end through the lever return air port 14, pushing the piston to move laterally. The piston movement directly drives the second valve stem 22 to overcome the resistance of the first spring 71, thereby achieving the switching of the air path.

[0055] The working process of the integrated transmission valve provided by this utility model is divided into the following three stages according to the state of the transmission master gearbox and the driver's operation:

[0056] When the main gearbox is in gear, the external mechanical mechanism drives the push rod 9 downward, pushing the first valve stem 21 downward against the spring resistance. The vent hole of the first valve stem 21 then moves downward and forms a sealed contact with the inner wall of the valve body 1, completely blocking the vent hole. At this time, gas from the filter air source cannot be transmitted to the actuator of the auxiliary gearbox through the valve body 1. The auxiliary gearbox remains stationary due to the lack of air input, thus forcibly avoiding the risk of malfunction of the auxiliary gearbox when the main gearbox is in gear.

[0057] When the main gearbox is switched to neutral, the external force on the push rod 9 is released, and the first valve stem 21 returns to its original position under the rebound force of the second spring 72, aligning the vent hole with the connecting hole 31 of the valve sleeve 3. After the gas enters the valve body 1 through the gas source inlet 12, one path is delivered to the handle return air port 14 of the shift lever through the gas source outlet 13 to form a control signal, and the other path enters the second valve port 11 through the first valve port 11, and then flows out through the second valve port 11 to the low-gear outlet 15 or the high-gear outlet 16 to enter the shift execution preparation area, providing pneumatic power reserve for the shifting of the auxiliary gearbox.

[0058] When the driver engages a lower gear, the shift lever guides the gas in the first valve port 11 to the lower gear outlet 15 at the second valve stem 22. The air pressure acts on the left side of the piston, pushing it to the right, simultaneously causing the second valve stem 22 to compress the first spring 71 and move to the right in sync. At this time:

[0059] Air passage connection path: Valve hole 11 is connected to low-gear air outlet 15. High-pressure gas enters the low-gear air chamber of the auxiliary box through low-gear air outlet 15, driving the shifting mechanism to complete low-gear engagement.

[0060] Reverse pressure relief path: Residual gas in the high-grade air circuit of the auxiliary box flows back into the valve body 1 through the high-grade air outlet 16, and is quickly discharged into the atmosphere through the corresponding exhaust plug 4, eliminating the interference of residual air pressure on the shifting action.

[0061] When the driver shifts to a higher gear, the shift lever cuts off the air supply path from the air inlet 12 to the air return port 14, and the gas in the upper part of the valve body 1 is directly discharged into the atmosphere. At this time:

[0062] Second valve stem 22 reset: Second valve stem 22 moves to the left under the action of first spring 71, and gas source outlet 13 is connected to high-grade gas outlet 16. High-pressure gas enters the high-grade gas chamber of auxiliary box from high-grade gas outlet 16, driving high-grade engagement.

[0063] Low-gear side pressure relief: The residual gas in the low-gear air circuit of the auxiliary box flows back to the valve body 1 through the low-gear air outlet 15 (that is, flows back to the second valve hole 11), and completes the pressure relief through the exhaust plug 4, ensuring that there is no air pressure conflict when switching between high and low gears.

[0064] This utility model embodiment also provides a transmission assembly, which includes a transmission main housing, a transmission auxiliary housing, and a transmission integrated valve, wherein the transmission auxiliary housing is connected to the transmission integrated valve.

[0065] Since the transmission assembly includes the integrated transmission valve provided by this utility model, the vent hole of the first valve stem 21 of the integrated transmission valve is used to selectively connect or disconnect the air source inlet 12 with the low-gear air outlet 15, the high-gear air outlet 16, and the air source outlet 13. The second valve stem 22 is used to selectively open the low-gear air outlet 15 or the high-gear air outlet 16. The first valve stem 21 and the second valve stem 22 cooperate with each other to prevent gas from entering the auxiliary gearbox when it is not working, thereby improving the air path switching stability of the integrated transmission valve. The valve sleeve 3 is provided with a connection hole 31 that is directly connected to the vent hole of the valve stem, which can optimize the air path connection efficiency. The valve stem provided by this utility model is a split structure. Compared with the integrated structure, the valve stem provided by this utility model has a simple structure, high reliability, and is easy to install.

[0066] Since it includes the aforementioned integrated transmission valve, the transmission assembly of this utility model embodiment has all the advantages and beneficial effects of the above embodiments, which will not be repeated here.

[0067] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A transmission integrated valve, characterized in that, include: The valve body (1) has a valve hole (11). The side wall of the valve body (1) is provided with an air source inlet (12), an air source outlet (13), a handle return air port (14), a low-grade air outlet (15), and a high-grade air outlet (16). The air source inlet (12), the air source outlet (13), the handle return air port (14), the low-grade air outlet (15), and the high-grade air outlet (16) are all connected to the valve hole (11). The air source outlet (13) is used to connect with the handle air inlet of the handle. The handle return air port (14) is used to connect with the handle air inlet. A valve stem is located inside the valve hole (11). The valve stem includes a first valve stem (21) and a second valve stem (22). The first valve stem (21) is provided with a vent hole, which is used to selectively connect or disconnect the gas source inlet (12) with the low-grade gas outlet (15), the high-grade gas outlet (16), and the gas source outlet (13). One end of the second valve stem (22) is provided with a first groove (221). The outer peripheral wall of the second valve stem (22) is provided with an annular protrusion (222). The annular protrusion (222) moves to allow the valve hole (11) to selectively connect with the low-grade gas outlet (15) or the high-grade gas outlet (16). The valve sleeve (3) is located inside the valve hole (11). The valve sleeve (3) is provided with a connecting hole (31) that communicates with the gas source inlet (12) and the gas source outlet (13). The first end of the first valve stem (21) is located inside the valve sleeve (3) and can slide along the axial direction of the valve sleeve (3) to block or open the connecting hole (31).

2. The transmission integrated valve according to claim 1, characterized in that, The valve body (1) is also provided with an exhaust plug (4), which is provided on the valve body (1) to connect the valve hole (11) with the outside, and the exhaust plug (4) is provided on both sides of the annular protrusion (222).

3. The transmission integrated valve according to claim 1, characterized in that, The transmission integrated valve also includes a piston assembly (5), which is mounted on the valve body (1) and is connected to the second valve stem (22) to push the second valve stem (22) to move.

4. The transmission integrated valve according to claim 3, characterized in that, The transmission integrated valve also includes a valve cover (6), which is located on both sides of the second valve stem (22) along with the piston assembly (5).

5. The transmission integrated valve according to claim 4, characterized in that, A first spring (71) is provided inside the valve body (1). The first spring (71) abuts against the wall of the valve hole (11), and the other end is installed in the first groove (221) of the second valve stem (22).

6. The transmission integrated valve according to claim 5, characterized in that, A second spring (72) is provided inside the valve body (1). The second spring (72) is located inside the valve hole (11). One end of the second spring (72) abuts against the hole wall of the valve cover (6), and the other end abuts against the first end of the first valve stem (21).

7. The transmission integrated valve according to claim 6, characterized in that, The transmission integrated valve also includes a stop block (8), which is located at one end of the valve sleeve (3) away from the valve body (1). The valve hole (11) has a first stepped surface (111) and a second stepped surface (112). The stop block (8) is located inside the valve hole (11) and abuts against the first stepped surface (111). The second stepped surface (112) abuts against the second spring (72).

8. The transmission integrated valve according to any one of claims 1-7, characterized in that, The number of connection holes (31) is multiple, the number of vent holes is multiple, the multiple connection holes (31) are arranged circumferentially along the valve sleeve (3), and the multiple vent holes are arranged circumferentially along the first valve stem (21).

9. The transmission integrated valve according to any one of claims 1-6, characterized in that, The transmission relay integrated valve also includes a push rod (9) and a push rod seat (10). The push rod seat (10) is provided with a mounting hole. The push rod seat (10) is fixedly connected to the valve body (1). The mounting hole communicates with the valve hole (11). The push rod (9) is installed in the mounting hole. One end of the push rod (9) is fixedly connected to the first valve stem (21). The other end of the push rod (9) is located outside the push rod seat (10), and the push rod (9) can move axially along the mounting hole.

10. A transmission assembly, characterized in that, It includes a transmission main housing, a transmission auxiliary housing, and a transmission integrated valve as described in any one of claims 1-9, wherein the transmission auxiliary housing is connected to the transmission integrated valve.

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