Truck dual cylinder electrically controlled super relay valve

Abstract

The utility model discloses a truck double cylinder electrical double -control super -relay valve, including cylinder, the upper portion of cylinder is installed with cylinder cover, is installed with throttle valve, check valve, travel switch and solenoid valve on the cylinder cover, the inside of cylinder is equipped with a pair of cavities, and the outside of a pair of cavity is connected with main air -intaking interface respectively, and is fixedly installed with fixed plate in a pair of cavity respectively, and the piston plate and the built -in cylinder body of fixed installation are movably installed in the cavity and are respectively located the upper and lower ends of fixed plate, the built -in cylinder body is equipped with adjusting mechanism, the utility model relates to relay valve technical field, and is equipped with a pair of cavities in the cylinder, and there is built -in cylinder body in each cavity, forms double cylinder brake mode, and the single cylinder air -intaking brake of light treading is released, and the piston of heavy treading auxiliary cylinder is up, and the compressed air of release sub -pump is released, and the main brake brake of cooperation sub -pump big pressure spring is released, and double brake, and the braking effect is very powerful effective.

Description

Technical Field

[0001] This utility model relates to the field of relay valve technology, specifically a super relay valve for dual-cylinder electric dual-control trucks. Background Technology

[0002] The relay valve is part of the automotive air brake system. In the braking system of heavy-duty trucks, the relay valve shortens the reaction time and pressure build-up time. A differential relay valve is generally used to prevent simultaneous operation of the driving and parking systems, and to avoid the overlap of forces in the combined spring brake cylinder and spring brake chamber, thus preventing overload of the mechanical transmission components and the rapid charging and venting of the spring brake cylinder.

[0003] The existing relay valve is a single-cylinder valve body, which adopts a single-cylinder braking mode. When braking, whether the brake is applied lightly or heavily, the braking mode of the single-cylinder valve body is always consistent. This will lead to a delay in the reaction time of air pressure braking in emergency braking situations, making it impossible to brake in time. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a dual-cylinder, electrically controlled, dual-relay valve for trucks, which solves the problem of delayed reaction time and inability to brake in time during emergency braking of existing single-cylinder valve bodies.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a dual-cylinder electric dual-control super relay valve for trucks, including a cylinder body, a cylinder head installed on the top of the cylinder body, a throttle valve, a check valve, a limit switch and a solenoid valve installed on the cylinder head, a pair of cavities provided inside the cylinder body, a main air intake interface connected to the outer side of the pair of cavities respectively, a fixing plate fixedly installed in the pair of cavities, a piston plate movably installed in the cavity and at the upper and lower ends of the fixing plate respectively, and an internal cylinder body fixedly installed, an adjustment mechanism provided in the internal cylinder body, six pairs of air pipe interfaces connected to the lower end of the pair of cavities, and an exhaust port connected to the lower end of the pair of internal cylinder bodies respectively.

[0006] Preferably, the adjusting mechanism includes a round-cap-shaped piston slidably installed in the built-in cylinder, a lower spring connecting the round-cap-shaped piston and the cylinder, openings on both sides of the built-in cylinder and on both sides of the round-cap-shaped piston, an air passage opening in the center of the fixed plate, a valve push rod movably inserted in the air passage, the upper end of the valve push rod connecting to the piston plate and the lower end having a gap with the round-cap-shaped piston, an upper spring sleeved on the outside of the valve push rod, the upper and lower ends of the upper spring contacting the piston plate and the fixed plate.

[0007] Preferably, the throttle valve has a foot brake command air port on its air inlet end, the limit switch has a control line and a brake light connection line, and the solenoid valve has a handbrake command air inlet, an emergency switch connection line, a limit switch connection line and a switch ground connection line. The control line and the limit switch connection line are electrically connected.

[0008] Preferably, the pair of cavities are connected and have a pressure gauge interface, and a pressure gauge is installed on the cylinder body and connected to the pressure gauge interface.

[0009] This utility model provides a super relay valve for a dual-cylinder electric dual-control truck, which has the following beneficial effects:

[0010] The cylinder body has a pair of cavities, each with an internal cylinder, forming a dual-cylinder braking mode. Lightly pressing the pedal allows the single cylinder to intake air for braking, while pressing it harder causes the piston in the auxiliary cylinder to move upward, releasing the compressed air from the slave cylinder. The high-pressure spring then releases, working in conjunction with the slave cylinder's main brake for braking. This dual braking provides a very powerful and effective braking effect. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention.

[0012] Figure 2 This is a top view of the cylinder body of this utility model.

[0013] Figure 3 This is a bottom view of the piston plate of this utility model.

[0014] Figure 4 This is a front sectional view of the cylinder body of this utility model.

[0015] In the diagram: 1. Cylinder block; 2. Cylinder head; 3. Throttle valve; 4. Check valve; 5. Limit switch; 6. Solenoid valve; 7. Main intake port; 8. Mounting plate; 9. Piston plate; 10. Internal cylinder block; 11. Air pipe interface; 12. Exhaust port; 13. Round cap piston; 14. Lower spring; 15. Valve pushrod; 16. Upper spring; 17. Foot brake command air port; 18. Control line; 19. Brake light connection line; 20. Handbrake command air inlet; 21. Emergency switch wiring; 22. Limit switch wiring terminal; 23. Switch grounding wiring; 24. Air pressure gauge. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a dual-cylinder electric dual-control super relay valve for trucks, including a cylinder body 1, a cylinder head 2 installed on the top of the cylinder body 1, a throttle valve 3, a check valve 4, a limit switch 5 and a solenoid valve 6 installed on the cylinder head 2, a pair of cavities are provided inside the cylinder body 1, a main air intake interface 7 is connected to the outer side of the pair of cavities respectively, a fixing plate 8 is fixedly installed in the pair of cavities, a piston plate 9 is movably installed in the cavity and located at the upper and lower ends of the fixing plate 8 respectively, and an internal cylinder 10 is fixedly installed, an adjustment mechanism is provided in the internal cylinder 10, six pairs of air pipe interfaces 11 are connected to the lower end of the pair of cavities, and an exhaust port 12 is connected to the lower end of the pair of internal cylinders 10 respectively;

[0018] The cylinder head 2 is equipped with a control air throttle valve 3, which controls the intake air speed and the downward speed of the piston plate 9 so that the air pressure gently enters the brake caliper, effectively controlling the brakes to prevent tire drag.

[0019] Check valve 4 prevents air from entering while allowing smooth exhaust. When the brake pedal is lifted, the intake and exhaust are both slow due to the throttle valve 3 controlling the air pressure and flow. This can cause the brake pads to retract slowly, wasting brake pads and wheel hub. Check valve 4 will release the brake piston gas instantly when the brake pedal is lifted, causing the brake pads to retract instantly.

[0020] When the piston plate 9 moves down halfway, the limit switch 5 opens to supply power to the auxiliary cylinder solenoid valve 6, and the auxiliary cylinder starts to work, releasing the air pressure of the brake cut-off cylinder and releasing the air cut-off cylinder; in conjunction with the master cylinder, it applies pressure to the brake pads, ensuring that the tire does not slip off when the vehicle is empty and that the braking effect is stable when the vehicle is loaded.

[0021] Solenoid valve 6 transmits an energizing signal through limit switch 5, closing the auxiliary cylinder's intake and opening the auxiliary cylinder's exhaust, releasing the air in the brake chamber of the slave cylinder, releasing the slave cylinder spring, and the spring pressure, in conjunction with the active brake push rod, simultaneously applies pressure to the brake pads, making heavy vehicle braking more effective;

[0022] The vehicle's brake wire is connected to limit switch 5. When braking, the limit switch is energized. When limit switch 5 descends halfway, single-cylinder braking occurs, and the vehicle is in an unloaded state, preventing tire slippage. When limit switch 5 descends more than halfway, the vehicle is in a loaded state, and limit switch 5 opens to supply power to solenoid valve 6, causing the auxiliary cylinder to start working. This works in conjunction with the master cylinder to simultaneously apply pressure to the brake pads, achieving dual electrical control and dual pressure control for safety. The braking distance is directly reduced by more than half, ensuring safety and reliability.

[0023] The circuit connections and gas pipeline connections involved in this technical solution are all conventional technical means, and their connection methods are common technical knowledge in the field of relay valves. Therefore, there is no need to describe the specific circuit connection methods and gas pipeline connection methods in detail.

[0024] Furthermore, the adjustment mechanism includes a round-cap-shaped piston 13 slidably installed in the built-in cylinder 10. A lower spring 14 is connected between the round-cap-shaped piston 13 and the cylinder 1. Openings are respectively opened on both sides of the built-in cylinder 10 and on both sides of the round-cap-shaped piston 13. An air passage is opened in the center of the fixed plate 8. A valve push rod 15 is movably inserted in the air passage. The upper end of the valve push rod 15 is connected to the piston plate 9 and the lower end is separated from the round-cap-shaped piston 13. An upper spring 16 is sleeved on the outside of the valve push rod 15. The upper and lower ends of the upper spring 16 are in contact with the piston plate 9 and the fixed plate 8.

[0025] Furthermore, the throttle valve 3 is provided with a foot brake command air port 17 at its air inlet end, the limit switch 5 is provided with a control line 18 and a brake light connection line 19, and the solenoid valve 6 is provided with a handbrake command air inlet 20, an emergency switch connection 21, a limit switch connection terminal 22 and a switch ground connection 23. The control line 18 and the limit switch connection terminal 22 are electrically connected.

[0026] When the foot brake command air reaches the valve body, connect the three-way valve. One pipe connects to the air inlet of the throttle valve 3, and the other pipe connects to the check valve 4 interface.

[0027] Furthermore, the pair of cavities are connected and have a pressure gauge interface, and a pressure gauge 24 is installed on the cylinder 1, and the pressure gauge 24 is connected to the pressure gauge interface.

[0028] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0029] Example: In use, when the driver presses the brake pedal, the piston plate 9 gently descends, and the piston plate 9 presses down on the round cap-shaped piston 13 via the valve lifter 15. At this time, the compressed air intake of the internal cylinder 10 is small, and single-cylinder braking does not cause tire drag. When the pedal is pressed down hard, the piston plate 9 descends halfway, and at the same time, the valve lifter 15 presses down on the round cap-shaped piston 13 halfway. The limit switch 5 on the cylinder head 2 opens to supply power to the solenoid valve 6, and the auxiliary cylinder (another internal cylinder 10) starts, cooperating with the master cylinder (internal cylinder 10) to apply pressure for braking. The solenoid valve 6 controls the auxiliary cylinder (another internal cylinder 10) to close the air cut-off brake supply, and at the same time releases the compressed air in the brake cut-off chamber of the slave pump, releasing the spring pressure, which, together with the master brake, increases the pressure on the brake pads, so that the brake pads and drum will achieve more effective braking.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-cylinder electrically controlled super relay valve for trucks, comprising a cylinder body (1), wherein a cylinder head (2) is mounted on top of the cylinder body (1), characterized in that: The cylinder head (2) is equipped with a throttle valve (3), a check valve (4), a limit switch (5) and a solenoid valve (6). The cylinder body (1) has a pair of cavities inside. The outer sides of the pair of cavities are respectively connected to the main air intake interface (7). The pair of cavities are respectively fixedly installed with a fixing plate (8). The cylinder body (10) is movably installed with a piston plate (9) and fixedly installed with an internal cylinder body (10) at the upper and lower ends of the fixing plate (8). The internal cylinder body (10) is provided with an adjustment mechanism. The lower ends of the pair of cavities are connected with six pairs of air pipe interfaces (11). The lower ends of the pair of internal cylinder bodies (10) are respectively connected with exhaust ports (12).

2. The dual-cylinder electrically controlled super relay valve for trucks according to claim 1, characterized in that, The adjustment mechanism includes a round-cap piston (13) slidably installed in the built-in cylinder (10). A lower spring (14) is connected between the round-cap piston (13) and the cylinder (1). Openings are respectively provided on the two side walls of the built-in cylinder (10) and on both sides of the round-cap piston (13). An air passage is provided in the center of the fixed plate (8). A valve push rod (15) is movably inserted in the air passage. The upper end of the valve push rod (15) is connected to the piston plate (9) and the lower end is separated from the round-cap piston (13). An upper spring (16) is sleeved on the outside of the valve push rod (15). The upper and lower ends of the upper spring (16) are in contact with the piston plate (9) and the fixed plate (8).

3. The dual-cylinder electrically controlled super relay valve for trucks according to claim 1, characterized in that, The throttle valve (3) has a foot brake command air port (17) on its air inlet end. The limit switch (5) has a control line (18) and a brake light connection line (19). The solenoid valve (6) has a handbrake command air inlet (20), an emergency switch connection line (21), a limit switch connection line (22), and a switch ground connection line (23). The control line (18) and the limit switch connection line (22) are electrically connected.

4. The dual-cylinder electrically controlled super relay valve for trucks according to claim 1, characterized in that, The two cavities are connected and have a pressure gauge interface. A pressure gauge (24) is installed on the cylinder (1) and the pressure gauge (24) is connected to the pressure gauge interface.

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