Cylinder assembly and pneumatic control system

Abstract

The application relates to the pneumatic technical field, and provides a cylinder assembly and a pneumatic control system. The cylinder assembly comprises a cylinder, a main piston and an auxiliary piston accommodated in the cavity of the cylinder, and the auxiliary piston is sleeved on the main piston, wherein: the auxiliary piston comprises a guide piece and a sealing piece fixed on the guide piece, the guide piece is provided with a first guide part in sliding fit with the inner wall of the cylinder and a second guide part in sliding fit with the outer wall of the main piston, the sealing piece is in sealing fit with the inner wall of the cylinder and the outer wall of the main piston, and the rigidity of the guide piece is greater than that of the sealing piece. According to the application, the guide piece with high rigidity is used to realize the sliding fit and radial support with the cylinder and the main piston, and the sealing piece with good elasticity is used to realize the contact sealing with the cylinder and the main piston, so that the auxiliary piston has stable guiding function and reliable sealing function, and the reliability of the cylinder assembly is improved.

Description

Technical Field

[0001] This application relates to the field of pneumatic technology, and more specifically, to cylinder assemblies and pneumatic control systems. Background Technology

[0002] In pneumatic actuators, a cylinder assembly structure is often used, consisting of a cylinder, a main piston housed in the cylinder, and an auxiliary piston mounted on the main piston. The auxiliary piston mainly relies on seals (such as rubber seals) to achieve dynamic sealing between itself and the inner wall of the cylinder and the outer wall of the main piston, and provides support and guidance during the movement of the main piston and the auxiliary piston.

[0003] To maintain guiding stability and prevent the main piston from deviating during movement, the seals require a large preload (interference fit) on the cylinder and main piston. This significantly increases the sliding friction resistance of the seals, not only increasing drive energy consumption but also placing the seals under high stress and high friction for extended periods. This makes them prone to wear, deviation, and tearing, leading to seal failure and affecting the normal operation of the cylinder assembly. For example, one existing method is to preload the seals with metal parts. This not only causes seal wear but also leads to abnormal wear and noise due to the friction between the metal parts and the cylinder wall.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] This application provides a cylinder assembly and a pneumatic control system that enables stable guiding and reliable sealing of the auxiliary piston.

[0006] According to one aspect of this application, a cylinder assembly is provided, including a cylinder and a main piston and an auxiliary piston disposed in the cavity of the cylinder, the auxiliary piston being mounted on the main piston, wherein the auxiliary piston includes a guide and a seal fixed on the guide, the guide having a first guide portion that slides in cooperation with the inner wall of the cylinder and a second guide portion that slides in cooperation with the outer wall of the main piston, the seal sealingly cooperating with the inner wall of the cylinder and the outer wall of the main piston, and the rigidity of the guide being greater than the rigidity of the seal.

[0007] In some embodiments, the axial first end of the guide member is provided with a radially outwardly extending first flange, the end face of the first flange abutting against the seal member, and the outer wall of the first flange forming the first guide portion.

[0008] In some embodiments, the first axial end of the seal is provided with a second flange extending radially outward, the end face of the first flange abuts against the second flange, and the edge of the second flange is provided with a first sealing lip that is interference-fitted with the inner wall of the cylinder.

[0009] In some embodiments, the second axial end of the guide member is provided with a plurality of radially inwardly extending and circumferentially spaced ribs, the plurality of ribs passing through the through hole of the seal member and forming the second guide portion.

[0010] In some embodiments, the plurality of raised ribs are evenly distributed at circumferential intervals.

[0011] In some embodiments, the inner wall of the second axial end of the seal is provided with a second sealing lip that is interference-fitted with the outer wall of the main piston.

[0012] In some embodiments, at least one sealing segment of the seal that abuts against at least one axial end face of the guide is fixed to the corresponding axial end face of the guide by a convex-concave interlocking structure.

[0013] In some embodiments, the seal is made of rubber material.

[0014] In some embodiments, at least the outer surface of the guide is made of a non-metallic material.

[0015] In some embodiments, the guide is made of engineering plastic.

[0016] In some embodiments, the outer wall of the main piston is provided with a shoulder, which slides and seals with the inner wall of the cylinder; the auxiliary piston includes two auxiliary pistons located on both sides of the shoulder in the axial direction, and the shoulder is used to work together with the corresponding auxiliary piston in the axial direction.

[0017] In some embodiments, the inner wall of the cylinder is provided with two stop portions located on both axial sides of the shoulder, each of the two stop portions being used to define an axial end position of a corresponding auxiliary piston of the two auxiliary pistons.

[0018] In some embodiments, the inner cavity of the cylinder is divided into two opposing working chambers by the main piston and the auxiliary piston. The two working chambers can be loaded with and unloaded with compressed air. When both working chambers are loaded with compressed air, the main piston occupies an axial central position. When one of the two working chambers is loaded with compressed air, the main piston occupies a corresponding axial end position. The auxiliary piston that matches the one working chamber is stopped by a corresponding stop.

[0019] In some embodiments, the main piston is connected to a push rod that extends out of the cylinder.

[0020] According to another aspect of this application, a pneumatic control system is provided, the pneumatic control system being configured with a cylinder assembly as described in any of the above embodiments, wherein the cylinder assembly constitutes an actuator of the pneumatic control system.

[0021] In some embodiments, the pneumatic control system is configured for a vehicle.

[0022] In some embodiments, the pneumatic control system is configured as a gearbox system, and the cylinder assembly is used to operate the shift mechanism of the gearbox system.

[0023] The advantages of this application compared to the prior art may include:

[0024] This application utilizes a highly rigid guide component to achieve sliding engagement and radial support with the cylinder and main piston, while a highly elastic seal component ensures contact sealing with the cylinder and main piston, giving the auxiliary piston stable guiding and reliable sealing functions. During cylinder assembly operation, as the main piston moves, the guide component achieves stable radial support and precise axial guidance through its sliding engagement with the cylinder and main piston. The seal component maintains a dynamic seal with the cylinder and main piston through an appropriate interference fit, improving sealing reliability and thus enhancing the overall reliability of the cylinder assembly.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0027] Figure 1 This diagram shows a cross-sectional view of the cylinder assembly in an embodiment of this application.

[0028] Figure 2 A three-dimensional structural schematic diagram of the guide component in an embodiment of this application is shown;

[0029] Figure 3 This shows a cross-sectional structural schematic diagram of the guide component in an embodiment of this application;

[0030] Figure 4 Show Figure 1 Enlarged structural diagram of region A in the middle;

[0031] Figure 5 Show Figure 1 A magnified structural diagram of region B in the middle. Detailed Implementation

[0032] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to those described herein. Rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0033] The accompanying drawings are merely illustrative of this application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted.

[0034] The use of terms such as "first," "second," and similar words in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. The terms "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship 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 on this application. Furthermore, in the description of this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two elements.

[0035] It should be noted that, unless otherwise specified, the embodiments of this application and the features in different embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] Figure 1 The diagram shows the cross-sectional structure of the cylinder assembly. Figure 2 The diagram illustrates the three-dimensional structure of the guide component, combined with... Figure 1 and Figure 2 As shown, the cylinder assembly provided in this embodiment includes a cylinder 100 and a main piston 200 and an auxiliary piston 300 housed in the cavity of the cylinder 100. The auxiliary piston 300 is fitted onto the main piston 200, wherein:

[0037] The auxiliary piston 300 includes a guide 310 and a seal 320 fixed on the guide 310. The guide 310 has a first guide portion 311 that slides with the inner wall of the cylinder 100 and a second guide portion 312 that slides with the outer wall of the main piston 200. The seal 320 is sealed with the inner wall of the cylinder 100 and the outer wall of the main piston 200, and the rigidity of the guide 310 is greater than that of the seal 320.

[0038] The guide member 310, through the first guide portion 311 and the second guide portion 312, respectively achieves precise sliding guidance of the auxiliary piston 300 on the inner wall of the cylinder 100 and the outer wall of the main piston 200, improving guiding stability. The guide member 310 has greater rigidity than the seal 320, providing stable and reliable radial support and axial sliding guidance, preventing the main piston 200 and auxiliary piston 300 from tilting, vibrating, or jamming during movement, ensuring the smoothness and precision of the piston assembly (including the main piston 200 and auxiliary piston 300). Thanks to the sliding guiding effect of the guide member 310, the seal 320 does not need to undertake guiding tasks; therefore, its required radial preload can be significantly reduced, thereby reducing frictional resistance, extending the service life of the seal 320, and reducing the risk of leakage due to excessive deformation of the seal 320.

[0039] Therefore, this application achieves sliding engagement and radial support with the cylinder 100 and the main piston 200 through the highly rigid guide member 310, while achieving contact sealing with the cylinder 100 and the main piston 200 through the highly elastic seal member 320, enabling the auxiliary piston 300 to have stable guiding and reliable sealing functions. During cylinder assembly operation, as the main piston 200 moves, the guide member 310 achieves stable radial support and precise axial guidance through sliding engagement with the cylinder 100 and the main piston 200, while the seal member 320 maintains a dynamic seal with the cylinder 100 and the main piston 200 through appropriate interference fit, improving sealing reliability and thus enhancing the reliability of the cylinder assembly.

[0040] In this context, the axial direction Z refers to the direction along the central axis of the cylinder 100 / main piston 200 / auxiliary piston 300. The ideal reciprocating linear motion direction of the main piston 200 and auxiliary piston 300 is the axial direction Z. The radial direction X refers to the direction perpendicular to the axial direction Z, that is, along the radial direction of the cylinder 100 / main piston 200 / auxiliary piston 300.

[0041] The cylinder assembly of this application is suitable for various pneumatic control systems, especially for high-load, high-frequency reciprocating motion applications such as commercial vehicle gearbox shifting mechanisms. It can ensure the long-term stable operation of commercial vehicle gearbox shifting mechanisms through extremely high reliability and long service life.

[0042] The guide component 310 can be made of a non-metallic material with sufficient strength and wear resistance to avoid friction with the inner wall of the cylinder 100. Alternatively, a wear-resistant coating such as polytetrafluoroethylene can be applied to the outside of a metallic material to form the guide component 310. Specific non-metallic materials include: engineering plastics such as PPA-GF50 (a composite material reinforced with polyphthalamide (PPA) and 50% glass fiber (GF)), PEEK (polyetheretherketone), PA66+GF (a composite material reinforced with nylon 66 (PA66) and 50% glass fiber); composite materials such as carbon fiber reinforced resin matrix composites; and engineering ceramics such as zirconium oxide and silicon nitride.

[0043] The seal 320 can be made of materials such as rubber or silicone, and achieves dynamic sealing through flexible / elastic contact with the inner wall of the cylinder 100 and the outer wall of the main piston 200.

[0044] The sliding fit between the guide 310 and the inner wall of the cylinder 100 and the outer wall of the main piston 200 can be a clearance fit, a contact fit with slight contact pressure, or a state between a clearance fit and a contact fit, as long as it can ensure smooth guidance and reduce wear.

[0045] Figure 3 The diagram shows the cross-sectional structure of the guide member 310. Figure 4 Indicate Figure 1 The magnified structure of region A in the middle, combined with Figures 1 to 4 As shown, in some embodiments, the first axial end of the guide member 310 is provided with a radially outwardly extending first flange 311'. The end face of the first flange 311' abuts against the seal member 320, serving to position and support the seal member 320 in the axial direction. The outer wall of the first flange 311' forms a first guide portion 311, which forms a sliding fit with the inner wall of the cylinder 100. The flange structure can increase the contact area between the guide member 310 and the cylinder 100, thereby improving the stability of the guide.

[0046] Continue to combine Figures 1 to 4As shown, in some embodiments, the first axial end of the seal 320 is provided with a radially outwardly extending second flange 321. The end face of the first flange 311' abuts against the second flange 321, enhancing the stability of the connection between the guide 310 and the seal 320 and providing a stable axial force transmission path. The edge of the second flange 321 is provided with a first sealing lip 322 that is interference-fitted with the inner wall of the cylinder 100, achieving a radial dynamic seal between the seal 320 and the inner wall of the cylinder 100. The interference between the first sealing lip 322 and the cylinder 100 can be designed to be small, as long as dynamic sealing is ensured without having to perform a guiding function. Therefore, friction and wear can be reduced, and the auxiliary piston 300 can be prevented from deflecting during movement, thereby ensuring the stability and accuracy of the axial movement of the auxiliary piston 300 and the main piston 200.

[0047] Figure 5 Indicate Figure 1 The magnified structure of region B in the middle, combined with Figures 1 to 3 as well as Figure 5 As shown, in some embodiments, the second axial end of the guide member 310 is provided with a plurality of radially inwardly extending and circumferentially spaced ribs 312'. The plurality of ribs 312' pass through the through hole of the seal member 320 and form a second guide portion 312, which forms a sliding fit with the outer wall of the main piston 200, thereby achieving precise guidance of the auxiliary piston 300 relative to the main piston 200 and preventing radial offset or misalignment between the two. In addition, the design of the plurality of ribs 312' of the guide member 310 passing through the through hole of the seal member 320 enables the guide member 310 and the seal member 320 to be mutually fitted and fixed at the second axial end.

[0048] Reference Figure 2 and Figure 3 As shown, in some embodiments, the second guide portion 312 formed by multiple ribs is evenly distributed circumferentially, which can provide the auxiliary piston 300 with circumferentially uniform radial support force and axial guiding force, ensuring that the auxiliary piston 300 is subjected to balanced force during movement, avoiding uneven wear or jamming caused by uneven force, thereby further improving the smoothness and reliability of the main piston's movement.

[0049] Combination Figure 1 , Figure 3 and Figure 5As shown, in some embodiments, the inner wall of the second axial end of the seal 320 is provided with a second sealing lip 323 that is interference-fitted with the outer wall of the main piston 200, thereby achieving a radial dynamic seal between the seal 320 and the outer wall of the main piston 200. Similar to the first sealing lip 322, the interference between the second sealing lip 323 and the main piston 200 can be designed to be small, as long as dynamic sealing is ensured without requiring a guiding function. This reduces friction and wear, and prevents the auxiliary piston 300 from deflecting during movement, thereby ensuring the stability and accuracy of the axial movement of the auxiliary piston 300 and the main piston 200.

[0050] Reference Figure 3 As shown, in some embodiments, at least one sealing segment of the seal 320, abutting against at least one axial end face of the guide 310, is fixed to the corresponding axial end face of the guide 310 by a protrusion-recessed interlocking structure 400. For example, a protrusion can be provided on the axial end face of the seal 320 (including the first axial end face and / or the second axial end face of the seal 320), and a groove can be provided at a corresponding position on the axial end face of the guide 310 (including the first axial end face and / or the second axial end face of the guide 310), or vice versa. Using the protrusion-recessed interlocking structure 400, mechanical interlocking of the seal 320 and the guide 310 in the axial and radial directions can be achieved, thereby realizing a firm and reliable connection between the seal 320 and the guide 310, preventing the seal 320 from shifting or twisting relative to the guide 310, and ensuring the integrity and reliability of the auxiliary piston 300 under long-term dynamic loads.

[0051] Reference Figure 1 As shown, in some embodiments, the outer wall of the main piston 200 is provided with a shoulder 210, which slides and seals with the inner wall of the cylinder 100. Two auxiliary pistons 300 are included, located on opposite axial sides of the shoulder 210, and the shoulder 210 is used to work axially with the corresponding auxiliary piston 300. Further, the inner wall of the cylinder 100 is provided with two stops 130 (the stops 130 can be formed as bosses or constricted structures) located on opposite axial sides of the shoulder 210, and the two stops 130 are used to define an axial end position of each of the two auxiliary pistons 300. Specifically, Figure 1 The left-side stop 130 is used to limit the axial end position of the right end of the left auxiliary piston 300, and the right-side stop 130 is used to limit the axial end position of the left end of the right auxiliary piston 300. The axial end position of the main piston 200 can be limited by the end face of the cylinder 100.

[0052] Continue to refer to Figure 1As shown, the inner cavity of cylinder 100 is divided into two opposing working chambers (110, 120) by a main piston 200 and an auxiliary piston 300. These two working chambers (110, 120) can be loaded and unloaded with compressed air respectively, so as to manipulate the axial movement of the main piston 200 as needed. During the operation of the cylinder assembly, the main piston 200 can have different axial positions depending on the different intake modes of the two working chambers (110, 120). Specifically, when both working chambers (110, 120) are loaded with compressed air, the main piston 200 can occupy an axial central position; when one of the two working chambers (110, 120) is loaded with compressed air, the main piston 200 can occupy a corresponding axial end position, and the auxiliary piston 300 corresponding to that working chamber is stopped by the stop portion 130. Specifically, when compressed air is loaded into the left working chamber 110, the main piston 200 occupies the right-hand axial end position, and the auxiliary piston 300, which is located on the left side of the shoulder 210 and matches the left working chamber 110, is stopped by the stop portion 130 located on the left side of the shoulder 210. Similarly, when compressed air is loaded into the right working chamber 110, the main piston 200 occupies the left-hand axial end position, and the auxiliary piston 300, which is located on the right side of the shoulder 210 and matches the right working chamber 110, is stopped by the stop portion 130 located on the right side of the shoulder 210. The main piston 200 can be connected to the push rod 500, for example, via a screw 600, and the push rod 500 extends out of the cylinder 100.

[0053] During the operation of the cylinder assembly, thanks to the sliding guiding effect between the guide component 310 and the cylinder 100 and the main piston 200, and the dynamic sealing effect between the seal component 320 and the cylinder 100 and the main piston 200, the auxiliary piston 300 and the main piston 200 can achieve precise axial movement, effectively avoiding wear, misalignment, jamming and other situations, thereby improving the working performance and reliability of the cylinder assembly.

[0054] This application also provides a pneumatic control system, which is equipped with a cylinder assembly as described in any of the above embodiments, wherein the cylinder assembly constitutes the actuator of the pneumatic control system. During the operation of the cylinder assembly, as the main piston 200 moves, the working position of the push rod 500 can be changed, thereby controlling the pneumatic control system to perform corresponding actions.

[0055] The pneumatic control system can be configured for use in vehicles. For example, in some embodiments, the pneumatic control system is configured as a transmission system, which can be applied to commercial vehicles or other suitable vehicle models. The cylinder assembly is used to operate the shift mechanism of the transmission system. For example, the push rod 500 can be connected to the shift mechanism of the transmission system, such as a shift fork. The neutral position or neutral position of the shift mechanism can be achieved through the central axial position of the main piston 200, and the engagement of two different gears can be achieved through the two axial end positions of the main piston 200. In other words, the engagement of one of the two gears can be achieved through each of the two axial end positions of the main piston 200. During the operation of the pneumatic control system, as the main piston 200 moves, the guide member 310 achieves stable radial support and precise axial guidance through sliding cooperation with the cylinder 100 and the main piston 200. The seal member 320 maintains dynamic sealing with the cylinder 100 and the main piston 200 through appropriate interference fit, improving sealing reliability, thereby improving the reliability of the cylinder assembly and the pneumatic control system, enabling the pneumatic control system such as the gearbox system to have extremely high response speed, accuracy and long-term working reliability.

[0056] In other embodiments, the pneumatic control system can also be applied in fields such as industrial automation and medical applications. Utilizing the cylinder assembly of this application, a highly rigid guide member 310 achieves sliding engagement and radial support with the cylinder 100 and the main piston 200, while a highly elastic seal member 320 achieves contact sealing with the cylinder 100 and the main piston 200. This ensures that the auxiliary piston 300 possesses stable guiding and reliable sealing functions, thereby guaranteeing the long-term stable and reliable operation of the cylinder assembly and the pneumatic control system.

[0057] Finally, it should be noted that the above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A cylinder assembly, comprising a cylinder and a main piston and an auxiliary piston disposed in a cavity of the cylinder, the auxiliary piston being fitted onto the main piston, characterized in that, The auxiliary piston includes a guide and a seal fixed on the guide. The guide has a first guide portion that slides with the inner wall of the cylinder and a second guide portion that slides with the outer wall of the main piston. The seal is sealed with the inner wall of the cylinder and the outer wall of the main piston, and the rigidity of the guide is greater than that of the seal.

2. The cylinder assembly as described in claim 1, characterized in that, The guide member has a first flange extending radially outward at its first axial end, the end face of the first flange abutting against the seal member, and the outer wall of the first flange forming the first guide portion.

3. The cylinder assembly as described in claim 2, characterized in that, The first axial end of the seal is provided with a second flange extending radially outward, the end face of the first flange abuts against the second flange, and the edge of the second flange is provided with a first sealing lip that is interference-fitted with the inner wall of the cylinder.

4. The cylinder assembly as described in claim 1, characterized in that, The second axial end of the guide member is provided with a plurality of radially inwardly extending and circumferentially spaced ribs, which pass through the through hole of the seal member and form the second guide portion.

5. The cylinder assembly as described in claim 4, characterized in that, The plurality of raised ribs are evenly distributed at intervals along the circumference.

6. The cylinder assembly as described in claim 4, characterized in that, The inner wall of the second axial end of the seal is provided with a second sealing lip that is interference-fitted with the outer wall of the main piston.

7. The cylinder assembly as described in any one of claims 1 to 6, characterized in that, At least one sealing section of the seal, which abuts against at least one axial end face of the guide, is fixed to the corresponding axial end face of the guide by a concave-convex interlocking structure.

8. The cylinder assembly as described in any one of claims 1 to 6, characterized in that, At least the outer surface of the guide is made of a non-metallic material.

9. The cylinder assembly as described in claim 8, characterized in that, The guide is made of engineering plastic.

10. The cylinder assembly as described in any one of claims 1 to 6, characterized in that, The outer wall of the main piston is provided with a shoulder, which slides and seals with the inner wall of the cylinder. The auxiliary piston includes two auxiliary pistons located on both sides of the shoulder in the axial direction, and the shoulder is used to work together with the corresponding auxiliary piston in the axial direction.

11. The cylinder assembly as claimed in claim 10, characterized in that, The inner wall of the cylinder is provided with two stop portions located on both sides of the shoulder along the axial direction. Each of the two stop portions is used to define an axial end position of a corresponding auxiliary piston of the two auxiliary pistons.

12. The cylinder assembly as claimed in claim 11, characterized in that, The cylinder's inner cavity is divided into two opposing working chambers by the main piston and the auxiliary piston. The two working chambers can be loaded with compressed air and can be unloaded. When both working chambers are loaded with compressed air, the main piston occupies an axial central position. When one of the two working chambers is loaded with compressed air, the main piston occupies a corresponding axial end position. The auxiliary piston that matches the working chamber is stopped by a corresponding stop.

13. The cylinder assembly as described in any one of claims 1 to 6, characterized in that, The main piston is connected to the push rod, which extends out of the cylinder.

14. A pneumatic control system, characterized in that, The pneumatic control system is equipped with a cylinder assembly as described in any one of claims 1 to 13, wherein the cylinder assembly constitutes an actuator of the pneumatic control system.

15. The pneumatic control system as described in claim 14, characterized in that, The pneumatic control system is configured for use in vehicles.

16. The pneumatic control system as described in claim 15, characterized in that, The pneumatic control system is configured as a gearbox system, and the cylinder assembly is used to operate the shifting mechanism of the gearbox system.

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