A device and a vehicle for controlling the height and attitude of the vehicle cab.

Abstract

This utility model discloses a device and vehicle for controlling the height and posture of a vehicle cab, comprising a height valve assembly and an adjusting linkage assembly. The height valve assembly includes a swing arm, a connecting shaft assembly, a rotor valve plate, a valve core assembly, an upper valve cover, and a lower valve body; the lower valve body has an air inlet, an air outlet, and an exhaust port with a muffler; the rotor valve plate and the valve core assembly cooperate to form a metal shear seal, switching the air path according to the swing arm position, and has a dead zone. The adjusting linkage assembly includes upper and lower connecting rods that can slide relative to each other and are locked by fastening sleeves, with connecting ball heads at both ends. This utility model has the advantages of large displacement, high inflation and deflation efficiency, fast response, good anti-fouling properties, low noise, and convenient adjustment, and is especially suitable for new energy vehicles, effectively improving the smoothness and reliability of the entire vehicle.

Description

Technical Field

[0001] This utility model relates to the field of commercial vehicle and automotive parts technology, and more specifically, to a device for adjusting vehicle suspension height, particularly for use in airbag suspension systems to control the height and attitude of the vehicle cab. Background Technology

[0002] The cab suspension system of commercial vehicles plays a crucial role in vehicle operation. It not only bears the weight of the cab and provides motion guidance, but also effectively mitigates impacts from the road surface and dampens vibrations, while simultaneously locking the cab. For cabs equipped with air suspension, the height valve assembly is one of its core components. It is responsible for precisely controlling the inflation and deflation of the airbags, thereby calibrating and maintaining the set height of the cab and responding quickly to changes in height.

[0003] Currently, most height valve assemblies widely used in commercial vehicle air suspension systems suffer from small displacement. This results in low inflation efficiency and slow response, particularly in conditions requiring rapid height adjustment or suppression of cab pitching (such as during emergency braking), where their performance is unsatisfactory. Furthermore, existing height valves generally have poor resistance to contamination, making them susceptible to performance degradation or malfunction due to impurities in the air supply. The exhaust noise is also significant, impacting ride comfort and failing to meet increasingly stringent requirements for overall vehicle smoothness.

[0004] On the other hand, the adjusting linkage used in conjunction with the height valve traditionally uses a metal ball head. This type of metal ball head is prone to wear during long-term use, leading to increased clearance, affecting the accuracy of height control, and even causing abnormal noise.

[0005] In order to overcome the shortcomings of the prior art, such as the small displacement of the height valve, low inflation efficiency, slow response, general anti-fouling properties, high exhaust noise, and easy wear of the adjusting linkage, this utility model aims to provide a new type of device for controlling the height and posture of the vehicle cab, so as to improve the suspension performance and driving comfort of commercial vehicles, especially new energy vehicles. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a device and vehicle for controlling the height and posture of the vehicle cab, so that it has the characteristics of large displacement, high inflation and deflation efficiency, fast response, good anti-fouling properties, low noise, and convenient and wear-resistant adjustment linkage, so as to improve the smoothness and reliability of the whole vehicle.

[0007] This utility model discloses a device for controlling the height and posture of a vehicle cab, characterized in that it includes a height valve assembly; an adjusting linkage assembly, one end of which is connected to the swing arm of the height valve assembly; the height valve assembly includes:

[0008] A swing arm; a connecting shaft assembly connected to the swing arm; a rotor valve plate mounted on the connecting shaft assembly and rotating therewith; at least two sets of valve core assemblies, each set of valve core assemblies including a valve core body and an elastic element, the valve core body having a working surface and an air passage, the working surface contacting and engaging with the surface of the rotor valve plate; a valve body including an upper valve cover and a lower valve body, the upper valve cover and the lower valve body cooperating to form a valve cavity, the rotor valve plate and the valve core assembly disposed within the valve cavity, the lower valve body having an air inlet, an air outlet, and an exhaust outlet, a silencer assembly mounted on the exhaust outlet, and the lower valve body also having a... The valve core assembly and the connecting shaft assembly are fitted together in an installation structure; the rotor valve plate has a flow channel structure, which selectively forms a fluid passage between the air inlet, air outlet and exhaust port according to the rotational position of the rotor valve plate relative to the lower valve body; the adjusting linkage assembly includes: an upper linkage and a lower linkage, which are slidable relative to each other to change their total length; a fastening mechanism, which engages with the upper linkage and the lower linkage to fix them in a selected relative position; one end of the upper linkage and the lower linkage is respectively provided with a connecting ball head, wherein one of the connecting ball heads is pivotally connected to the swing arm.

[0009] Preferably, the mating surface of the rotor valve plate and the working surface of the valve core assembly form a metal-to-metal shear seal structure.

[0010] Preferably, the connecting shaft assembly includes a connecting shaft body with a stepped shaft structure. The connecting shaft body is provided with a swing arm mounting boss and a rotor valve plate mounting boss. The swing arm is mounted on the swing arm mounting boss, the rotor valve plate is mounted on the rotor valve plate mounting boss, and at least one O-ring is provided between the swing arm mounting boss and the rotor valve plate mounting boss.

[0011] Preferably, each valve core assembly has an axially penetrating valve core air passage at the center of its valve core body, and a valve core O-ring is coaxially fitted onto the valve core body. The elastic element is a helical spring, with one end of the helical spring abutting against the valve core body and the other end abutting against the mounting structure of the lower valve body.

[0012] Preferably, the relative geometric arrangement of the flow channel structure of the rotor valve plate and the air inlet, air outlet and exhaust of the lower valve body is configured such that when the swing arm is in a predetermined horizontal position and rotates within ±2° from that horizontal position, no fluid passage is formed between the air inlet, air outlet and exhaust.

[0013] Preferably, the swing arm is fixed to the connecting shaft assembly by a hexagonal lock nut, a flat washer, and a retaining ring, and there is a preset gap between the swing arm and the connecting shaft assembly.

[0014] Preferably, the upper connecting rod of the adjusting connecting rod assembly is provided with a first sliding groove, and the lower connecting rod is provided with a second sliding groove; the fastening mechanism is a fastening sleeve, which is provided with a U-shaped groove, and the U-shaped groove cooperates with a locking post provided on the upper connecting rod or the lower connecting rod.

[0015] Preferably, one end of the upper connecting rod and the lower connecting rod are respectively provided with a ball head spherical mounting hole, and the connecting ball head is installed in the ball head spherical mounting hole by a snap fastener.

[0016] Preferably, the height valve assembly further includes a fixing sleeve, which is installed in the lower valve body by an interference fit, and the fixing sleeve has a structure for fixing the height valve assembly to the vehicle mounting bracket.

[0017] This utility model also discloses a vehicle, including a cab, a chassis or axle, and a suspension system connecting the cab and the chassis or axle. The suspension system includes an airbag shock absorber and a device for controlling the height and attitude of the vehicle cab. One end of the adjusting linkage assembly is connected to the cab or the chassis / axle, and the other end is connected to the swing arm of the height valve assembly. The air inlet of the height valve assembly is connected to the vehicle's air source, and the air outlet is connected to the airbag shock absorber of the suspension system.

[0018] The beneficial effects of this utility model are as follows: By comprehensively and meticulously optimizing the structure of the height valve assembly and the adjusting linkage assembly, this utility model successfully provides a vehicle cab height and posture control device that integrates efficient control, high sealing, precise adjustment, low noise comfort, and long-term durability. This device not only overcomes many shortcomings of existing technologies but also demonstrates significant progress in improving overall vehicle performance and driving experience. It has important practical value and broad application prospects, and is particularly suitable for modern vehicles, including new energy vehicles, that have high requirements for comfort and reliability.

[0019] Firstly, regarding achieving precise and sensitive control and enhancing ride comfort, the core components of this device—the height valve assembly and adjusting linkage assembly—lay the foundation for precise and sensitive height control through the precise coordination of their internal structures, such as the swing arm, connecting shaft assembly, rotor valve plate, valve core assembly, and valve body. Specifically, the swing arm can sensitively sense height changes and drive the rotor valve plate to switch the air path, while the adjustable length design of the adjusting linkage ensures wide installation adaptability and flexible initial height setting. Furthermore, the muffler assembly located at the exhaust port effectively reduces exhaust noise, significantly improving ride comfort. Moreover, the rotor valve plate flow channel structure and the specific geometric arrangement of the air ports in the lower valve body create an effective control dead zone. Therefore, it effectively avoids frequent valve operation caused by minor bumps when the vehicle is driving on a smooth road surface. This not only reduces ride discomfort and unnecessary energy consumption but also helps extend the service life of related components.

[0020] Secondly, to ensure high sealing performance and extend service life, this device employs multiple reliable sealing measures. For example, the metal-to-metal shear seal structure formed between the rotor valve plate and the working surface of the valve core assembly offers superior wear resistance, high and low temperature resistance, and contamination resistance compared to traditional sealing methods. Simultaneously, the stepped shaft body structure connecting the rotor assembly and its O-ring seal, along with the valve core O-ring seal and the helical spring providing continuous preload within the valve core assembly, collectively ensure the sealing reliability of each critical component. Therefore, these designs significantly improve the overall sealing performance of the valve body, effectively prevent gas leakage, reduce malfunctions caused by seal failure, and thus substantially extend the device's service life.

[0021] Furthermore, this device also incorporates numerous considerations to enhance structural stability and ease of operation. On one hand, the swing arm is fixed to the connecting shaft assembly using specific fasteners with a pre-existing clearance. This design ensures reliable fixation while providing a certain degree of cushioning at the connection point, effectively absorbing impacts, preventing wear, and improving the durability of the transmission mechanism. On the other hand, the sliding groove design of the adjusting linkage assembly, the locking mechanism of the U-shaped groove and locking pin of the fastening sleeve, and the ball joint connection of the connecting ball head make linkage length adjustment convenient and quick, locking reliable, and motion transmission flexible. In addition, the height valve assembly, installed in the lower valve body via an interference fit with a fixing sleeve, provides a stable and reliable mounting foundation for the entire device, ensuring its stability during vehicle operation. Therefore, these structural designs collectively improve the ease of installation and commissioning, connection reliability, and overall structural stability of the device.

[0022] Finally, in terms of practical application and overall performance, applying the aforementioned advantageous device to vehicles and clarifying its connection with the vehicle's suspension system, air supply, etc., can fully realize its performance. In summary, through the synergistic effect of the aforementioned structural features, this utility model provides a device for controlling the height and posture of a vehicle cab that is structurally sound, reliable in performance, easy to adjust, low in noise, and long-lasting. It significantly improves vehicle handling stability, ride comfort, and component durability, possessing significant practical value and broad prospects for promotion. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of a large displacement height valve assembly and adjusting linkage device according to this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of a large displacement height valve assembly according to this utility model;

[0026] Figure 3 This is a structural disassembly diagram of a large displacement height valve assembly according to this utility model;

[0027] Figure 4 This is a schematic diagram illustrating the working principle of a large displacement height valve assembly according to this utility model.

[0028] Figure 5 This is a schematic diagram of the valve body of a large displacement height valve assembly according to this utility model;

[0029] Figure 6 This is a schematic diagram illustrating the working principle of the rotor valve plate and valve core assembly of this utility model;

[0030] Figure 7 This is a schematic diagram of the valve core assembly of this utility model;

[0031] Figure 8 This is a structural schematic diagram of the connecting shaft assembly of this utility model;

[0032] Figure 9 This is a schematic diagram of the upper valve cover of this utility model;

[0033] Figure 10 This is a schematic diagram of the lower valve body of this utility model;

[0034] Figure 11 This is a structural disassembly diagram of the adjusting linkage assembly of this utility model;

[0035] Figure 12 This is a schematic diagram of a derivative structure of a large displacement height valve assembly according to this utility model;

[0036] Figure 13 This is a schematic diagram of a derivative structure of an adjusting linkage assembly according to this utility model;

[0037] The main components in the diagram are labeled as follows: 1-Height valve assembly, 2-Adjusting linkage assembly, 101-Hexagonal lock nut, 102-Flat washer, 103-Swing arm, 104-Retaining ring, 105-Connecting shaft assembly, 1051-Connecting shaft body, 1052-Connecting shaft positioning section, 1053-Rotor valve plate mounting boss, 1054-First connecting shaft O-ring seal, 1055-Second connecting shaft O-ring seal 1056 - O-ring seal, 1057 - Connecting shaft threaded section, 106 - Rotor valve plate, 107 - Lower valve body O-ring seal, 108 - Valve core assembly, 1081 - Valve core body, 1082 - Valve core air passage, 1083 - Valve core working surface, 1084 - Valve core O-ring seal, 1085 - Helical spring, 109 - Upper valve cover, 1091 - Upper valve cover screw mounting hole, 1092 - Fixed sleeve mounting hole. 1093 - Connecting shaft guide hole; 1094 - First connecting shaft O-ring mounting groove; 110 - Lower valve body; 1101 - Lower valve body threaded hole; 1102 - Valve core assembly air inlet A mounting hole; 1103 - Valve core assembly exhaust port C mounting hole; 1104 - Connecting shaft assembly mounting hole; 1105 - Lower valve body O-ring mounting groove; 1106 - Vent main chamber; 111 - Fastening screw; 112 - Fixing sleeve 113-Air inlet A air pipe connector assembly, 114-Silencer assembly, 115-Air outlet B air pipe connector assembly, 201-Upper connecting rod, 2011-First slide groove, 202-Connecting ball head, 203-Fastening sleeve, 2031-U-shaped groove, 204-Lower connecting rod, 2041-Second slide groove, 205-Ball head spherical mounting hole, 206-Snap fastener, 207-Snap pin, A-Air inlet, B-Air outlet, C-Exhaust port. Detailed Implementation

[0038] The following description will be based on the accompanying drawings of the embodiments of this utility model (e.g., ...). Figure 1-13 As shown in the figure, the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0039] This utility model discloses an overall structure of a large-displacement height valve assembly and an adjusting linkage device. Figure 1 The system mainly consists of a height valve assembly 1 and an adjusting linkage assembly 2. The main function of the height valve assembly 1 is to inflate or deflate the airbag shock absorber according to changes in the cab height. The adjusting linkage assembly 2 is used to sense and transmit changes in the cab height relative to the axle or chassis, and then transmit this change to the height valve assembly 1. Its length is adjustable, and it is used to set and adjust the reference installation height of the airbag shock absorber, thereby indirectly controlling the overall height and attitude of the cab.

[0040] The overall structure of height valve assembly 1 ( Figure 2 The diagram shows its external shape and three main air ports: inlet A, outlet B, and exhaust C. Its exploded structure (…). Figure 3 The main internal components are clearly displayed, including: hexagonal locking nut 101, flat washer 102, swing arm 103, retaining ring 104, connecting shaft assembly 105, rotor valve plate 106, lower valve body O-ring seal 107, valve core assembly 108, upper valve cover 109, lower valve body 110, fastening screw 111, fixing sleeve 112, air inlet A pipe connector assembly 113, silencer assembly 114, and air outlet B pipe connector assembly 115.

[0041] Specifically, the hexagonal locking nut 101, flat washer 102, and retaining ring 104 work together to fix the swing arm 103 onto the connecting shaft assembly 105, ensuring a certain preset gap between the swing arm 103 and the connecting shaft assembly 105 to avoid direct wear during movement and allow for a certain amount of elastic deformation absorption. The swing arm 103 is preferably made of spring steel, giving it a certain degree of elasticity to resist lateral forces and effectively prevent damage to the height valve assembly 1 caused by lateral forces. Simultaneously, it reliably converts the vertical movement transmitted from the adjusting linkage assembly 2 into rotational movement around the connecting shaft assembly 105.

[0042] The connecting shaft assembly 105 is the core transmission component, primarily responsible for accurately transmitting angular displacement and supporting the rotation of the rotor valve plate 106. The rotor valve plate 106 is mounted on the connecting shaft assembly 105 and is preferably made of anodized aluminum to improve its hardness and wear resistance. When the connecting shaft assembly 105 drives the rotor valve plate 106 to rotate at different angles, specific flow channel structures on the rotor valve plate 106 selectively connect different air passage chambers within the height valve assembly 1, thereby achieving intake, exhaust, or pressure holding functions.

[0043] The lower valve body O-ring 107 is installed between the mating surfaces of the upper valve cover 109 and the lower valve body 110, playing a major static sealing role and ensuring that no gas leakage occurs at the valve body joint.

[0044] Two sets of valve core assemblies 108 are typically installed in the lower valve body 110 at positions corresponding to the air inlet A and the exhaust port C, respectively. They fit precisely with the bottom surface of the rotor valve plate 106, forming a key structure for dynamic sealing and passage switching.

[0045] The upper valve cover 109 primarily serves to cover and secure the valve core assembly 108, pressing the rotor valve plate 106 against it and providing axial positioning and radial support for the connecting shaft assembly 105. The lower valve body 110 is the main housing of the valve, with three air ports (A, B, C) machined on it, and holes or chambers for mounting the valve core assembly 108, the connecting shaft assembly 105, and the fixing sleeve 112. Fastening screws 111 are used to securely connect the upper valve cover 109 to the lower valve body 110.

[0046] The fixing sleeve 112 is typically fitted into the mounting hole of the lower valve body 110 using an interference fit, used to fix the entire height valve assembly 1 to the vehicle's mounting bracket and to provide some support. The air inlet A pipe connector assembly 113 typically has a quick-connect fitting for connecting the air supply line from the vehicle's air reservoir. The muffler assembly 114 is installed at the exhaust port C to reduce airflow noise generated during exhaust. The air outlet B pipe connector assembly 115 also typically has a quick-connect fitting for connecting the line to the airbag shock absorber.

[0047] Working principle of height valve assembly 1 ( Figure 4-5 The working principle of the rotor valve plate 106 and the valve core assembly 108. Figure 6 As follows: When the height of the cab changes due to uneven road surface or load changes during vehicle operation, the adjusting linkage assembly 2 will cause the swing arm 103 to swing up and down.

[0048] If the swing arm 103 moves downward (for example, the cab height decreases), the connecting shaft assembly 105 drives the rotor valve plate 106 to rotate counterclockwise (in the inflation state), so that the air inlet A and the air outlet B are connected. Compressed air enters through the air pipe connector assembly 113 of the air inlet A, passes through the internal flow channel of the valve body, and is output from the air pipe connector assembly 115 of the air outlet B to the airbag shock absorber. The airbag inflates, and the cab height increases accordingly.

[0049] If the swing arm 103 moves upward (for example, the cab height increases), the connecting shaft assembly 105 drives the rotor valve plate 106 to rotate clockwise (exhaust state), so that the air outlet B and the exhaust port C are connected. The air in the airbag shock absorber enters the valve body through the air pipe connector assembly 115 of the air outlet B, passes through the internal flow channel of the valve body, and is discharged to the atmosphere from the exhaust port C through the muffler assembly 114. The airbag deflates, and the cab height decreases accordingly.

[0050] When the cab height reaches the preset equilibrium position, the swing arm 103 is in a horizontal position, and the rotor valve plate 106 is also in the middle dead zone position (dead zone state). At this time, the air inlet A, air outlet B, and exhaust outlet C are isolated from each other, and the height valve assembly 1 neither inflates nor deflates, maintaining a stable airbag height. The dead zone range of this utility model is specified as 4° (corresponding to the swing arm's ±2° swing range). This design can effectively avoid frequent valve operation caused by minor road bumps, reducing unnecessary comfort disturbances and air consumption.

[0051] Both the rotor valve plate 106 and the valve core assembly 108 have a high degree of surface finish, and after grinding, they form a precise metal shear seal. The rotor valve plate 106 is designed with a special opening shape, and the valve core assembly 108 has a unique flow channel design, which makes the airflow direction perpendicular to the sealing surface, thus forming a highly efficient and reliable metal shear seal technology.

[0052] The specific structure of valve core assembly 108 ( Figure 7 As follows: In this embodiment, the height valve assembly 1 typically includes two sets of valve core assemblies 108, respectively installed in the valve core assembly inlet A mounting hole 1102 and valve core assembly exhaust port C mounting hole 1103 of the lower valve body 110. Each set of valve core assemblies 108 includes a valve core body 1081, which is typically a stepped shaft structure with a valve core air passage 1082 extending through its center along its axial direction. The upper end face of the valve core body 1081 forms the valve core working surface 1083, used for contact and mating with the bottom surface of the rotor valve plate 106. A valve core O-ring seal 1084 and a helical spring 1085 are coaxially fitted on the valve core body 1081. The helical spring 1085 provides a certain preload to ensure that the valve core working surface 1083 is always in close contact with the bottom surface of the rotor valve plate 106, forming an effective dynamic seal. The valve core body 1081 is preferably made of stainless steel to ensure its strength and corrosion resistance. The valve core O-ring 1084 is used to effectively seal the gap between the valve core body 1081 and the mounting hole of the lower valve body 110 to prevent air leakage. The valve core air passage 1082 and the valve core working surface 1083 are usually kept perpendicular to ensure smooth airflow and effective sealing.

[0053] The specific structure of the connecting shaft assembly 105 ( Figure 8The connecting shaft body 1051 is typically a stepped shaft structure, preferably made of lead steel and nickel-plated to improve corrosion resistance and wear resistance. The connecting shaft body 1051 is sequentially provided with a connecting shaft threaded section 1057, a rocker arm mounting boss 1056, a rotor valve plate mounting boss 1053, and a connecting shaft positioning section 1052. Between the rocker arm mounting boss 1056 and the rotor valve plate mounting boss 1053, a second connecting shaft O-ring seal 1055 and a first connecting shaft O-ring seal 1054 are also provided. The connecting shaft positioning section 1052, after installation, is located in the connecting shaft assembly mounting hole 1104 of the lower valve body 110, serving a radial positioning function. The rotor valve plate mounting boss 1053 is used to mount the rotor valve plate 106 and typically has a non-circular cross-section (such as a D-shaped surface or spline) to achieve reliable torque transmission. The first connecting shaft O-ring 1054 is installed in the first connecting shaft O-ring mounting groove 1094 of the upper valve cover 109, providing a first axial seal. The second connecting shaft O-ring 1055 is installed in the connecting shaft guide hole 1093 of the upper valve cover 109, providing a second axial seal, together preventing gas leakage from the mating point between the upper valve cover 109 and the connecting shaft assembly 105. The rocker arm mounting boss 1056 is used to install the rocker arm 103. The connecting shaft threaded section 1057 is used to mate with the hexagonal lock nut 101, thereby fastening the rocker arm 103, the flat washer 102, and the retaining ring 104 to the connecting shaft assembly 105.

[0054] The specific structure of the upper valve cover 109 ( Figure 9 The upper valve cover 109 is provided with an upper valve cover screw mounting hole 1091 for installing a fastening screw 111, and a fixing sleeve mounting hole 1092 for installing a fixing sleeve 112. The connecting shaft guide hole 1093 is used for radial positioning and guiding of the connecting shaft assembly 105, ensuring the perpendicularity of the connecting shaft assembly 105 and avoiding wear due to eccentric force. The first connecting shaft O-ring mounting groove 1094 is used to accommodate and position the first connecting shaft O-ring 1054. The upper valve cover 109 body is preferably made of engineering plastic, which has good resistance to deformation and dimensional stability. Simultaneously, the upper valve cover 109 also serves to clamp the rotor valve plate 106. Before use, grease is applied to the surfaces of the upper valve cover 109 that contact the rotating parts to effectively lubricate the corresponding parts and reduce wear.

[0055] The specific structure of the lower valve body 110 ( Figure 10The lower valve body 110 is preferably made of engineering plastic. It has a lower valve body threaded hole 1101 for installing fastening screws 111. The lower valve body 110 clearly marks an air inlet A, an air outlet B, and an exhaust port C, which are respectively connected to the air inlet A pipe connector assembly 113, the air outlet B pipe connector assembly 115, and the muffler assembly 114. A fixing sleeve mounting hole (1092 here should be understood as the corresponding hole on the lower valve body) is provided for interference fitting of the fixing sleeve 112. A valve core assembly air inlet A mounting hole 1102 and a valve core assembly exhaust port C mounting hole 1103 are provided for installing two sets of valve core assemblies 108 respectively. A connecting shaft assembly mounting hole 1104 is provided for installing the connecting shaft assembly 105. A lower valve body O-ring mounting groove 1105 is also provided for installing the lower valve body O-ring 107. The lower valve body 110 forms a main ventilation chamber 1106, which is connected to the air outlet B. When the height valve assembly 1 is inflated, air from the air source enters the main ventilation chamber 1106 through the air inlet A, the valve core assembly 108 (corresponding to air inlet A), and the rotor valve plate 106, and then enters the airbag shock absorber through the air outlet B. When the height valve assembly 1 is deflated, air from the airbag shock absorber enters the main ventilation chamber 1106 through the air outlet B, and after the rotor valve plate 106 and another set of valve core assemblies 108 (corresponding to exhaust port C), it is discharged into the atmosphere from the exhaust port C through the muffler assembly 114.

[0056] The specific structure of the adjusting linkage assembly 2 ( Figure 11 The assembly is mainly composed of an upper connecting rod 201, a connecting ball joint 202, a fastening sleeve 203, and a lower connecting rod 204. Both the upper connecting rod 201 and the lower connecting rod 204 are provided with ball-head spherical mounting holes 205 for mounting the connecting ball joint 202, and locking posts 207 for engaging the fastening sleeve 203. The connecting ball joint 202 is secured in the ball-head spherical mounting hole 205 by a snap-fit ​​206, forming a flexible spherical hinge connection. The upper connecting rod 201 and the lower connecting rod 204 are respectively provided with a first sliding groove 2011 and a second sliding groove 2041 (not all details may be explicitly shown in the figure, but functionally they represent parts that can slide relative to each other). The first sliding groove 2011 and the second sliding groove 2041 can slide relative to each other, thereby achieving adjustment of the overall length of the adjusting connecting rod assembly 2, and thus enabling precise control of the airbag shock absorber's installation height and the initial attitude of the cab. The fastening sleeve 203 is provided with a U-shaped groove 2031, which cooperates with the locking post 207 provided on the upper connecting rod 201 or the lower connecting rod 204 to lock and fix the first sliding groove 2011 and the second sliding groove 2041 in the selected relative position.

[0057] A derivative structure of a large displacement height valve assembly ( Figure 12 ) and a derivative structure of an adjusting linkage assembly ( Figure 13The invention explains that the external component structure of the height valve assembly 1 or the locking method of the adjusting linkage assembly 2 can be adapted to different vehicle chassis layout requirements and installation boundary conditions, but the structure and working principle of its internal core components remain the same. Therefore, these derived structures are all within the protection scope of this utility model.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for controlling the height and attitude of a vehicle cab, characterized by, The system includes a height valve assembly (1); an adjusting linkage assembly (2), one end of which is connected to the rocker arm (103) of the height valve assembly (1); the height valve assembly (1) includes: a rocker arm (103); a connecting shaft assembly (105) connected to the rocker arm (103); a rotor valve plate (106) mounted on the connecting shaft assembly (105) and rotating therewith; and at least two sets of valve core assemblies (108), each set of valve core assemblies including a valve core body and an elastic element. The valve core body has a working surface and an air passage, the working surface being in contact with the surface of the rotor valve plate (106); the valve body includes an upper valve cover (109) and a lower valve body (110), the upper valve cover (109) and the lower valve body (110) forming a valve cavity, the rotor valve plate (106) and the valve core assembly (108) being disposed within the valve cavity, the lower valve body (110) being provided with an air inlet, an air outlet, and an exhaust outlet, and an exhaust port being installed on the exhaust outlet. The muffler assembly (114) and the lower valve body (110) are further provided with an installation structure that cooperates with the valve core assembly (108) and the connecting shaft assembly (105); the rotor valve plate (106) has a flow channel structure, which selectively forms a fluid passage between the air inlet, the air outlet and the exhaust port according to the rotational position of the rotor valve plate (106) relative to the lower valve body (110); the regulating linkage assembly (2) includes: an upper linkage (201) The upper link (201) and the lower link (204) are slidable relative to each other to change their total length; a fastening mechanism (203) engages with the upper link (201) and the lower link (204) to fix them in a selected relative position; one end of the upper link (201) and the lower link (204) is provided with a connecting ball (202), wherein each of the connecting ball (202) is pivotally connected to the swing arm (103).

2. The apparatus for controlling the height and attitude of a vehicle cab according to claim 1, wherein The mating surface of the rotor valve plate (106) and the working surface of the valve core assembly (108) form a metal-to-metal shear sealing structure.

3. The apparatus for controlling the height and attitude of a vehicle cab according to claim 1, wherein The connecting shaft assembly (105) includes a connecting shaft body (1051) with a stepped shaft structure. The connecting shaft body (1051) is provided with a swing arm mounting boss (1056) and a rotor valve plate mounting boss (1053). The swing arm (103) is mounted on the swing arm mounting boss (1056), and the rotor valve plate (106) is mounted on the rotor valve plate mounting boss (1053). At least one O-ring is provided between the swing arm mounting boss (1056) and the rotor valve plate mounting boss (1053).

4. The device for controlling the height and posture of a vehicle cab according to claim 1, characterized in that, Each valve core assembly (108) has an axially penetrating valve core air passage at the center of the valve core body. The valve core body is coaxially fitted with a valve core O-ring seal. The elastic element is a helical spring, with one end of the helical spring abutting against the valve core body and the other end abutting against the mounting structure of the lower valve body (110).

5. The device for controlling the height and posture of a vehicle cab according to any one of claims 1 to 4, characterized in that, The flow channel structure of the rotor valve plate (106) and the relative geometric arrangement of the air inlet, air outlet and exhaust of the lower valve body (110) are configured such that when the swing arm (103) is in a predetermined horizontal position and rotates within ±2° from that horizontal position, no fluid passage is formed between the air inlet, air outlet and exhaust.

6. The device for controlling the height and posture of a vehicle cab according to claim 1, characterized in that, The swing arm (103) is fixed to the connecting shaft assembly (105) by a hexagonal locking nut (101), a flat washer (102) and a retaining ring (104), and there is a preset gap between the swing arm (103) and the connecting shaft assembly (105).

7. The device for controlling the height and posture of a vehicle cab according to claim 1, characterized in that, The upper connecting rod (201) of the adjusting connecting rod assembly (2) is provided with a first sliding groove (2011), and the lower connecting rod (204) is provided with a second sliding groove (2041); the fastening mechanism (203) is a fastening sleeve, which is provided with a U-shaped slot (2031), and the U-shaped slot (2031) cooperates with the locking pin (207) provided on the upper connecting rod (201) or the lower connecting rod (204).

8. The device for controlling the height and posture of a vehicle cab according to claim 1 or 7, characterized in that, One end of the upper connecting rod (201) and the lower connecting rod (204) are respectively provided with a ball head spherical mounting hole (205), and the connecting ball head (202) is installed in the ball head spherical mounting hole (205) by a buckle (206).

9. The device for controlling the height and posture of a vehicle cab according to claim 1, characterized in that, The height valve assembly (1) also includes a fixing sleeve (112), which is installed in the lower valve body (110) by an interference fit, and the fixing sleeve (112) has a structure for fixing the height valve assembly (1) to the vehicle mounting bracket.

10. A vehicle comprising a cab, a chassis or axle, and a suspension system connecting the cab and the chassis or axle, the suspension system including air suspension shock absorbers, characterized in that, It also includes a device for controlling the height and attitude of the vehicle cab as described in any one of claims 1 to 9; one end of the adjusting linkage assembly (2) is connected to the cab or the chassis / axle, and the other end is connected to the swing arm (103) of the height valve assembly (1); the air inlet of the height valve assembly (1) is connected to the air source of the vehicle, and the air outlet is connected to the airbag shock absorber of the suspension system.

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