Inflatable trailer brake valve for tractor

Abstract

The utility model discloses an inflatable trailer brake valve for a tractor, which comprises a valve body, a valve seat, a valve cover and a valve core, an air outlet hole and an air inlet hole are respectively arranged in the valve body, the valve seat is arranged in the valve body, one end of the valve seat is connected with a spring seat, the inside of the spring seat is in sealed sliding connection with a control piece, and a first pre-tightening spring is arranged between the control piece and the spring seat. One end of the valve body is connected with a valve cover, a valve element is slidably connected into the valve cover and located on one side of the control part, and when the valve element moves towards the control part, the control part overcomes the first pre-tightening spring part and communicates with the air inlet hole. An air inlet hole and an air outlet hole are matched to adopt an air pressure driving braking mode, so that the failure rate and the maintenance cost are reduced; through sealing elements such as O-shaped rings and sealing strips and a plurality of pre-tightening springs, flowing of airflow is accurately controlled, and the stability and reliability of the braking effect are improved; and meanwhile, the angle of the handle can be further quickly adjusted by moving the control plate in cooperation with the cover plate, the control plate and the control spring.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an inflatable trailer brake valve for tractors. Background Art

[0002] Traditional brake valves for tractors usually adopt mechanical or hydraulic structures, which have certain limitations and deficiencies. Mechanical brake valves are easily affected by wear and fatigue, resulting in a decline in braking effect; while hydraulic brake valves rely on the pressure of oil to drive, and once the oil leaks or the pressure is insufficient, braking failure will occur. In addition, existing brake valves often have difficulty in precisely controlling the flow direction and flow rate of air, affecting the stability and reliability of the braking effect. Content of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides an inflatable trailer brake valve for tractors.

[0004] To solve the above technical problems, the utility model is solved by the following technical solutions: The inflatable trailer brake valve for tractors includes a valve body, a valve seat, a valve cover and a valve core. An air outlet hole and an air inlet hole are respectively arranged in the valve body. The valve seat is placed inside the valve body. One end of the valve seat is connected with a spring seat. A control member is hermetically and slidably connected inside the spring seat. A first pre-tightening spring is arranged between the control member and the spring seat. One end of the valve body is connected with the valve cover. The valve core is slidably connected in the valve cover. The valve core is located on one side of the control member. When the valve core moves towards the control member, the control member will overcome the first pre-tightening spring to connect the air outlet hole and the air inlet hole.

[0005] In the above solution, preferably, a plurality of O-rings are arranged between the valve seat and the valve body. A placement groove is arranged on the valve seat, and the O-rings are placed in the placement groove.

[0006] In the above solution, preferably, an O-ring is arranged between the spring seat and the valve seat. The first pre-tightening spring is arranged between the washer of the spring seat and the baffle of the control member. Under the action of the first pre-tightening spring, the washer abuts against the spring seat.

[0007] In the above solution, preferably, a groove is arranged on the inner wall of the spring seat, and an O-ring is placed in the groove. A first sealing strip and a second sealing strip are concentrically arranged at the end of the control member. When the first pre-tightening spring is at rest, the first sealing strip is hermetically connected with the valve seat.

[0008] In the above solution, preferably, a through hole is arranged on the valve body, and the through hole is connected to the air inlet hole in a penetrating manner.

[0009] In the above solution, preferably, a connecting member is slidably disposed in the valve seat, and the end of the connecting member is connected to the valve seat by a screw. When the connecting member axially moves in the valve seat, the valve seat moves towards the control member and abuts against the second sealing strip until the first sealing strip disengages from the valve seat, and the air outlet hole communicates with the air inlet hole.

[0010] In the above solution, preferably, a resisting plate is disposed on the valve body, a damping spring is disposed between the resisting plate and the valve seat, a clamping block is concentrically disposed with the connecting member, and a second pre-tightening spring is disposed between the resisting plate and the clamping block.

[0011] In the above solution, preferably, a lever is disposed through the valve body and into the connecting member, the lever is connected to an operating lever located in the valve body, and the operating lever drives the lever to rotate.

[0012] In the above solution, preferably, a dial block is disposed outside the valve body, the dial block is matingly connected to the lever, a limiting square block is disposed on the lever, and at least two sets of square holes mating with the limiting square block are disposed on the dial block.

[0013] In the above solution, preferably, a cover body is disposed outside the dial block, sliding grooves are symmetrically disposed on the outside of the cover body, a control plate is disposed in the sliding grooves, the control plate includes a rotatable locking plate, a plug rod is disposed at the bottom of the cover body, the locking plate can be sleeved in the plug rod, and a control spring is disposed between the control plate and the cover body.

[0014] The beneficial effects of the present utility model are as follows: By adopting the air pressure drive braking method in cooperation with the air inlet hole and the air outlet hole, the failure rate and maintenance cost are reduced; Through various sealing elements such as O-rings and sealing strips, and several pre-tightening springs, the flow of air is precisely controlled, improving the stability and reliability of the braking effect; At the same time, in cooperation with the cover plate, the control plate and the control spring, after the handle of the operating lever is fixed, the handle angle can be further quickly adjusted by moving the control plate. Description of the Drawings

[0015] Figure 1 It is a three-dimensional view of the present utility model.

[0016] Figure 2 It is a sectional view of the present utility model in the first direction.

[0017] Figure 3 It is a sectional view of the present utility model in the second direction.

[0018] Figure 4 It is an internal structure diagram of the present utility model.

[0019] Figure 5 It is Figure 4 An enlarged view of part A of

[0020] Figure 6Schematic diagram of the control part of the present utility model. Specific embodiments

[0021] The following further describes the present utility model in detail in conjunction with the accompanying drawings and specific embodiments: Refer to Figures 1 - 6 , the inflatable trailer brake valve for a tractor includes a valve body 1, a valve seat 2, a valve cover 3 and a valve core 4. At the same time, an air outlet 5 and an air inlet 6 are respectively arranged on the valve body 1, and the operation of the valve body 1 is realized by controlling the position of the valve core 4.

[0022] The valve seat 2 is hermetically arranged in the valve body 1. A plurality of placement grooves 10 are arranged on the valve seat 2, and O-rings are arranged in the placement grooves 10 to realize the sealed connection between the valve seat 2 and the valve body 1. Therefore, a plurality of through holes are arranged on the valve seat 2 at the same time. The through holes are located below the air inlet 6, and the gas can smoothly enter the valve seat 2.

[0023] A spring seat 7 is arranged in the valve seat 2. An O-ring is arranged between the spring seat 7 and the valve seat 2 to realize the seal between the two. At the same time, a control part 9 is hermetically and slidably connected between the spring seats 7. The spring seat 7 is provided with a groove 13 and sealed with an O-ring. When the control part 9 slides, it is always in a sealed state. At the same time, a first preloading spring 8 is arranged between the spring seat 7 and the valve seat 2. Specifically, a washer 11 is arranged in the spring seat 7, and a baffle 12 is arranged in the valve seat 2. Therefore, a first preloading spring 8 is arranged between the washer 11 and the baffle 12. When the first preloading spring 8 is in a static state, the end of the control part 9 always abuts against the valve seat 2.

[0024] Furthermore, a first sealing strip 14 and a second sealing strip 15 are arranged at the end of the control part 9. The two are concentrically arranged at the end of the control part 9. At the same time, the diameter of the first sealing strip 14 is larger than that of the second sealing strip 15. The first sealing strip 14 abuts against the control part 9 to realize the seal. Therefore, the control part 9, the spring seat 7 and the valve seat 2 are all hermetically connected.

[0025] At the same time, the spring seat 7 and the valve seat 2 are fixed by a retaining ring. A damping spring is arranged between the retaining ring and the valve body 1. The damping spring is used for positioning the valve seat 2 to facilitate its installation. At the same time, a valve cover 3 is arranged at the end of the valve body 1. The valve cover 3 is clamped in the valve body 1, and an O-ring is also arranged between them for sealing. At the same time, the valve cover 3 abuts against the valve seat 2 and is stably connected in the valve body 1.

[0026] A valve core 4 is connected in the valve cover 3. One end of the valve core 4 is hermetically and slidably connected in the valve cover 3, that is, there is also an O-ring seal between the valve core 4 and the valve cover 3. A connecting piece 16 is connected in the valve body 1. The connecting piece 16 is connected to the valve core 4 by a screw 17. The connecting piece 16 is axially connected in the valve body 1. Therefore, the movement of the connecting piece 16 drives the valve core 4 to move towards the control part 9. When the valve core 4 abuts against the control part 9, it abuts against the second sealing strip 15 and disengages from the first sealing strip 14.

[0027] Furthermore, a resisting plate 21 is arranged on the valve body 1. A damping spring is arranged between the resisting plate 21 and the valve seat 2. At the same time, a clamping block 22 is concentrically arranged on the connecting piece 16. A second pre-tightening spring is arranged between the resisting plate 21 and the clamping block 22. Therefore, during the movement of the connecting piece 16, both the clamping block 22 and the control part 9 overcome the first pre-tightening spring 8 and the second pre-tightening spring to penetrate the air inlet hole 6 and the air inlet hole 6.

[0028] A shift lever 18 is arranged in the connecting piece 16 through the valve body 1. The shift lever 18 is also connected to a control lever 20 located in the valve seat 2. The control lever 20 can rotate in the valve body 1, that is, the control lever 20 drives the connecting piece 16, the screw 17 and the valve core 4 to move, that is, the air inlet hole 6 and the air outlet hole 5 can be penetrated to allow air to pass through. Moreover, when the valve core 4 is reset, after the first sealing strip 14 and the valve cover 3 abut against each other again, its tail gas is discharged from the control part 9 to the side of the shift lever 18.

[0029] A shift block 19 is arranged on the outer side of the valve body 1. The shift block 19 is matched and connected to the shift lever 18. Specifically, a limiting square block 28 is arranged on the shift lever 18. At least two groups of square holes 29 matching the limiting square block 28 are arranged on the shift block 19. The angle between the square holes 29 is 45°. A cover body 23 is arranged on the outer side of the shift block 19. The cover body 23 covers the outer side of the shift block 19. Wherein, sliding grooves are symmetrically arranged on the outer side of the cover body 23. A control plate 24 is arranged in the sliding grooves. Rotatable locking plates 27 are arranged on both sides of the control plate 24. An insertion rod 26 is arranged at the bottom of the cover plate. The locking plates 27 can be rotatably sleeved on the insertion rod 26. A control spring 25 is arranged between the control plate 24 and the cover plate. When the locking plates 27 are sleeved on the insertion rod 26, the control plate 24 abuts against the shift block 19 to unlock the control block, and the shift block 19 can overcome the control plate 24 to lift and rotate into the required square hole 29. Generally, a handle is arranged on the control lever 20. Threads are arranged on the control lever 20. However, for a specific angle, the handle needs to be placed in the other square hole. Therefore, in cooperation with the cover body and the control plate, the state of quickly adjusting the angle of the handle can be realized.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Pneumatic trailer brake valve for tractors, characterized in that: The vent hole and the inlet hole are respectively arranged in the valve body, and the valve seat is built in the valve body. One end of the valve seat is connected with a spring seat, and the spring seat is internally sealed and slidably connected to a control member. A first preload spring is arranged between the control member and the spring seat. One end of the valve body is connected with the valve cover, and the valve cover is slidably connected to the valve core. The valve core is located on one side of the control member. When the valve core moves toward the control member, the control member will overcome the first preload spring to connect the vent hole and the inlet hole.

2. The pneumatic trailer brake valve for tractor according to claim 1, characterized in that: A plurality of O-rings are arranged between the valve seat and the valve body, and a placement groove is arranged on the valve seat, and the O-rings are placed in the placement groove.

3. The pneumatic trailer brake valve for tractor according to claim 1, characterized in that: An O-ring is arranged between the spring seat and the valve seat, and the first preload spring is arranged between a washer located on the spring seat and a baffle of the control member. Under the action of the first preload spring, the washer and the spring seat are pressed against each other.

4. The pneumatic trailer brake valve for tractor according to claim 1, characterized in that: A groove is arranged on the inner wall of the spring seat, an O-ring is placed in the groove, a first sealing strip and a second sealing strip are concentrically arranged at the end of the control member, the first preload spring is at rest, and the first sealing strip is sealed and connected to the valve seat.

5. The pneumatic trailer brake valve for tractor according to claim 1, characterized in that: The valve body is provided with a through hole, and the through hole is connected with the air inlet hole.

6. The pneumatic trailer brake valve for tractor according to claim 1, characterized in that: A connecting piece is slidably arranged in the valve seat, and the end of the connecting piece is connected to the valve seat by a screw. When the connecting piece moves axially in the valve seat, the valve seat moves toward the control piece and abuts against the second sealing strip until the first sealing strip is separated from the valve seat, and the air outlet is connected with the air inlet.

7. The pneumatic trailer brake valve for a tractor according to claim 1, characterized in that: A backing plate is arranged on the valve body, a damping spring is arranged between the backing plate and the valve seat, a clamping block is arranged concentrically with the connecting piece, and a second preload spring is arranged between the backing plate and the clamping block.

8. The pneumatic trailer brake valve for a tractor according to claim 1, characterized in that: A shifting rod is arranged through the valve body and enters into the connecting member. The shifting rod is connected to an operating rod located in the valve body, and the operating rod drives the shifting rod to rotate.

9. The pneumatic trailer brake valve for a tractor according to claim 8, characterized in that: A shift block is arranged outside the valve body, the shift block is matched and connected to the shift rod, a limiting block is arranged on the shift rod, and at least two groups of square holes matching the limiting block are arranged on the shift block.

10. The pneumatic trailer brake valve for a tractor according to claim 9, characterized in that: A cover body is arranged outside the shift block, and a slide groove is symmetrically arranged outside the cover body. A control plate is arranged in the slide groove, and the control plate includes a rotatable locking plate. A plug rod is arranged at the bottom of the cover body, and the locking plate can be sleeved in the plug rod. A control spring is arranged between the control plate and the cover body.

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