Power-assisted relay valve

Abstract

The utility model relates to the field of relay valves, and discloses a power-assisted relay valve which comprises a relay valve body, and a limiting core is arranged on the upper portion in the relay valve body. In the power-assisted relay valve, during braking, a driver controls a brake valve through feet to enable an air inlet to start air inflow, on one hand, a piston moves upwards with the help of air pressure, and on the other hand, the piston moves upwards with the help of air pressure; on the other hand, gas pressure is detected by a pressure switch, when the gas pressure reaches a preset value, the pressure switch triggers a micro motor to start, the micro motor drives a limiting core to rotate through transmission connection, and rotation of the limiting core is converted into vertical movement of a power assisting ring through a threaded column; the power assisting rod and the connecting rod transmit assisting power to the upper surface of the piston, the piston is pulled to move upwards, and therefore the power assisting effect is achieved, in this way, the response speed of a brake system is increased, and it is guaranteed that enough braking force can be rapidly established under the emergency situation.

Description

Technical Field

[0001] The utility model relates to the field of relay valves, in particular to a power-assisted relay valve. Background Art

[0002] The relay valve is part of a vehicle's air brake system. In trucks, it shortens brake response and release times. The quick-release valve's primary function is to deflate the rear wheel brake chambers as close as possible, quickly releasing the rear brakes and improving vehicle stability during braking.

[0003] According to the Chinese authorized patent announcement number: CN108313042B, a relay valve is disclosed, which belongs to the field of automobile braking. The relay valve disclosed in the present invention includes an upper valve body and a lower valve body, a relay piston chamber is provided between the upper valve body and the lower valve body, and a piston 1 is provided in the relay piston chamber; the upper external portion of the upper valve body is provided with an air inlet 2, an air inlet 3, an exhaust port 2 and an exhaust port 3, and the exhaust port 2 is provided with a diaphragm and a valve in sequence from the inside to the outside; the lower valve body is provided with an air inlet 1, an exhaust port 1 and an exhaust port 4, a valve chamber is provided inside the lower valve body, and a piston 2 is provided in the valve chamber, and the wall of the piston 2 is a Y-shaped structure with the opening upward, and the Y-shaped structure is provided inside. Spring, a Y-shaped sealing ring is provided on the spring, and a spring seat is provided above the Y-shaped sealing ring; the relay valve provided by the present invention has a compact structure and occupies a small installation space. The quick release valve does not need to open the valve body for installation and is easy to install. The molds for producing the upper and lower valve bodies are also relatively simple, with low production costs and long service life. However, the relay valve still has shortcomings. In situations where strong braking force is required, such as heavy vehicles or high-speed driving, traditional relay valves may not be able to provide sufficient force to quickly decelerate or stop the vehicle, affecting driving safety. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present invention provides a power-assisted relay valve that solves the problem that traditional relay valves may not be able to provide sufficient force to quickly slow down or stop the vehicle when strong braking force is required, such as heavy vehicles or when driving at high speeds.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a power-assisted relay valve, including a relay valve body, a limiting core is arranged on the upper part of the relay valve body, the lower end of the limiting core is arranged through the center of the piston, and the upper surface of the piston is provided with a power-assisted assembly, the power-assisted assembly includes a threaded column, a power-assisted ring, a power-assisted rod, a connecting rod and a micro motor, the threaded column is fixedly connected to the outer side of the upper end of the limiting core, the outer side of the threaded column is threadedly connected to the power-assisted ring, the left and right sides of the power-assisted ring are fixedly connected to the power-assisted rod, the lower side of the two power-assisted rods away from the power-assisted ring is fixedly connected to the connecting rod, the lower end of the connecting rod is fixedly connected to the upper surface of the piston, the micro motor is fixedly connected to the upper surface of the relay valve body, and the output end of the micro motor is transmission-connected to the limiting core.

[0006] Preferably, an air inlet communicating with the inner cavity of the relay valve body is opened at the lower side of one side of the relay valve body, three exhaust ports communicating with the inner cavity of the relay valve body are opened on the upper outer side of the relay valve body, and a pressure switch is provided on the inner wall surface of the air inlet.

[0007] Preferably, telescopic guide columns are provided on both the front and rear sides of the upper surface of the piston, the free ends of the two telescopic guide columns are fixedly connected to the piston, and the fixed ends of the two telescopic guide columns are fixedly connected to the top end inside the relay valve body.

[0008] Preferably, a return spring is sleeved on the outer side of the two telescopic guide columns, the lower end of the return spring is fixedly connected to the upper surface of the piston, and the upper end of the return spring is fixedly connected to the top end inside the relay valve body.

[0009] Preferably, both upper and lower ends of the threaded column are fixedly connected to limit rings.

[0010] Preferably, one end of the power assist rod away from the threaded column is fixedly connected to a connecting slider, and the connecting slider is slidably connected to the inner side of the relay valve body.

[0011] Beneficial effects

[0012] The utility model provides a power-assisted relay valve. Compared with the prior art, it has the following beneficial effects:

[0013] 1. In the present invention, by providing a power assist assembly, when braking, the driver controls the valve with his foot, causing air to start to flow into the air inlet. On the one hand, the piston itself moves upward due to the gas pressure, and the incoming air flow is discharged through the three exhaust ports. On the other hand, the gas pressure is detected by a pressure switch. When the gas pressure reaches a preset value, the pressure switch triggers the micromotor to start. The micromotor drives the limit core to rotate through a transmission connection. The rotation of the limit core is converted into vertical movement of the power assist ring through a threaded column. The power assist is then transmitted to the upper surface of the piston through the power assist rod and the connecting rod, pulling the piston upward, thereby achieving the power assist effect. This method not only improves the response speed of the brake system, but also ensures that sufficient braking force can be quickly established in an emergency.

[0014] 2. In the present invention, by providing a return spring, when the driver releases his foot to control the valve while driving, and no air enters the air inlet, the reaction force provided by the return spring helps the piston return to its initial position after the gas pressure disappears, thereby ensuring rapid resetting of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front three-dimensional structure of a power-assisted relay valve proposed in the present utility model;

[0016] Figure 2 This is a schematic structural diagram of a power-assisted relay valve proposed by the present invention from an oblique upper perspective;

[0017] Figure 3 This is a schematic cross-sectional structure diagram of the upper half of a power-assisted relay valve proposed in the present invention;

[0018] Figure 4 This is a schematic front view of the cross-section structure of the upper half of a power-assisted relay valve proposed by the present invention.

[0019] Legend:

[0020] 1. Relay valve body; 2. Power assist assembly; 201. Threaded column; 202. Power assist ring; 203. Power assist rod; 204. Connecting slider; 205. Limiting ring; 206. Connecting rod; 207. Micro motor; 3. Limiting core; 4. Piston; 5. Telescopic guide column; 6. Return spring; 7. Air inlet; 8. Exhaust port; 9. Pressure switch. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-4 , the utility model provides two technical solutions, specifically including the following embodiments:

[0023] Example 1:

[0024] A power-assisted relay valve includes a relay valve body 1, a limiting core 3 is provided on the upper part of the relay valve body 1, the lower end of the limiting core 3 is penetrated and arranged at the center of the piston 4, and a power-assisted component 2 is provided on the upper surface of the piston 4. The power-assisted component 2 includes a threaded column 201, a power-assisted ring 202, a power-assisted rod 203, a connecting rod 206 and a micro motor 207. The threaded column 201 is fixedly connected to the outer side of the upper end of the limiting core 3, the outer side of the threaded column 201 is threadedly connected to the power-assisted ring 202, and the left and right sides of the power-assisted ring 202 are fixedly connected to the power-assisted rods 203. The lower sides of the ends of the two power-assisted rods 203 away from the power-assisted ring 202 are fixedly connected to the connecting rod 206, and the lower ends of the connecting rods 206 are fixedly connected to the upper surface of the piston 4. The micro motor 207 is fixedly connected to the upper surface of the relay valve body 1, and the output end of the micro motor 207 is transmission-connected to the limit core 3. An air inlet 7 connected to the inner cavity of the relay valve body 1 is opened at the lower side of the relay valve body 1, and three exhaust ports 8 connected to the inner cavity of the relay valve body 1 are opened on the upper outer side of the relay valve body 1. The three exhaust ports 8 are respectively connected to the spring air chamber driving cavity, the atmosphere, and the brake valve. The air inlet 7 is externally connected to the foot-controlled brake valve, and a pressure switch 9 is provided on the inner wall surface of the air inlet 7. The pressure switch 9 is electrically connected to the micro motor 207. The specific model of the pressure switch 9 is PS-100-24DC, which is suitable for gas pressure detection. The upper and lower ends of the threaded column 201 are fixedly connected to the limit ring 205.

[0025] During operation, when braking, the driver controls the valve with his foot, so that the air inlet 7 starts to take in air. On the one hand, the piston 4 itself moves upward with the help of gas pressure, and the incoming air flow is discharged through three exhaust ports 8. On the other hand, the gas pressure is detected by the pressure switch 9. When the gas pressure reaches the preset value, the pressure switch 9 triggers the micro motor 207 to start. The micro motor 207 drives the limit core 3 to rotate through the transmission connection. The rotation of the limit core 3 is converted into the vertical movement of the power assist ring 202 through the threaded column 201, and then the power assist is transmitted to the upper surface of the piston 4 through the power assist rod 203 and the connecting rod 206, pulling the piston 4 upward, thereby achieving the power assist effect. In this way, not only the response speed of the braking system is improved, but also it is ensured that sufficient braking force can be quickly established in an emergency.

[0026] Example 2:

[0027] Based on the first embodiment, telescopic guide posts 5 are provided on both the front and rear sides of the upper surface of the piston 4. The free ends of the two telescopic guide posts 5 are fixedly connected to the piston 4, and the fixed ends of the two telescopic guide posts 5 are fixedly connected to the internal top of the relay valve body 1. A return spring 6 is sleeved on the outside of the two telescopic guide posts 5. The lower end of the return spring 6 is fixedly connected to the upper surface of the piston 4, and the upper end of the return spring 6 is fixedly connected to the internal top of the relay valve body 1. The end of the power assist rod 203 away from the threaded post 201 is fixedly connected to a connecting slider 204, which is slidably connected to the inner side of the relay valve body 1. When driving, the air inlet 7 is not flowing. The piston 4 moves upward under the action of the gas, causing the telescopic guide posts 5 to extend along their axial direction. At the same time, the return spring 6 is compressed. At this time, the three air inlets 7 remain open. When driving, if the driver releases the foot control valve, the air inlet 7 is not flowing. At this time, the reaction force provided by the return spring 6 helps the piston 4 return to its initial position after the gas pressure disappears, ensuring the rapid reset of the valve and meeting the continuous demand for fluid medium during driving.

[0028] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the scope of protection of the present application.

Claims

1. A power-assisted relay valve, comprising a relay valve body (1), characterized in that: A limiting core (3) is provided above the interior of the relay valve body (1), the lower end of the limiting core (3) is provided through the center of the piston (4), and a power assist assembly (2) is provided on the upper surface of the piston (4), the power assist assembly (2) comprises a threaded column (201), a power assist ring (202), a power assist rod (203), a connecting rod (206) and a micro motor (207), the threaded column (201) is fixedly connected to the outer side of the upper end of the limiting core (3), and the outer side of the threaded column (201) A power-assisting ring (202) is threadedly connected, and power-assisting rods (203) are fixedly connected to the left and right sides of the power-assisting ring (202), and the lower sides of the two power-assisting rods (203) away from the power-assisting ring (202) are fixedly connected to connecting rods (206), and the lower ends of the connecting rods (206) are fixedly connected to the upper surface of the piston (4), and the micro motor (207) is fixedly connected to the upper surface of the relay valve body (1), and the output end of the micro motor (207) is transmission-connected to the limit core (3).

2. A power-assisted relay valve according to claim 1, characterized in that: An air inlet (7) communicating with the inner cavity of the relay valve body (1) is provided at the lower side of one side of the relay valve body (1), three air outlets (8) communicating with the inner cavity of the relay valve body (1) are provided at the upper outer side of the relay valve body (1), and a pressure switch (9) is provided on the inner wall surface of the air inlet (7).

3. The power-assisted relay valve according to claim 1, characterized in that: Telescopic guide columns (5) are provided on both the front and rear sides of the upper surface of the piston (4), the free ends of the two telescopic guide columns (5) are fixedly connected to the piston (4), and the fixed ends of the two telescopic guide columns (5) are fixedly connected to the top end inside the relay valve body (1).

4. The power-assisted relay valve according to claim 3, characterized in that: A return spring (6) is sleeved on the outside of the two telescopic guide columns (5), the lower end of the return spring (6) is fixedly connected to the upper surface of the piston (4), and the upper end of the return spring (6) is fixedly connected to the top end inside the relay valve body (1).

5. The power-assisted relay valve according to claim 1, characterized in that: The upper and lower ends of the threaded column (201) are fixedly connected to the limiting ring (205).

6. The power-assisted relay valve according to claim 1, characterized in that: One end of the booster rod (203) away from the threaded column (201) is fixedly connected to a connecting slider (204), and the connecting slider (204) is slidably connected to the inner side of the relay valve body (1).

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