Valve element assembly for pneumatic drive-by-wire brake valve

Abstract

The utility model provides a valve element assembly for an air pressure drive-by-wire brake valve, and belongs to the technical field of automobile braking. The valve element assembly comprises a movable iron core and a wear-resisting ring, two circular ring grooves are formed in the cylindrical surface of the movable iron core, a vertical opening is formed in the wear-resisting ring so that the wear-resisting ring can be installed in the circular ring grooves in a matched mode, the wear-resisting ring is made of PTEE, and the cylindrical surface of the movable iron core is sleeved with a magnetism isolating pipe. The outer surface of the wear-resistant ring protrudes out of the cylindrical surface of the movable iron core and is in sliding contact with the circumferential inner wall of the magnetic isolation tube, a static iron core is arranged above the movable iron core, one end of the static iron core is arranged in the magnetic isolation tube, and the adjacent position of the movable iron core and the static iron core is located in the magnetic isolation tube. The valve element assembly provided by the utility model adopts the wear-resisting ring as a wear-resisting medium between the movable iron core and the magnetism isolating tube, so that the wear-resisting property is better, the wear caused by mutual sliding of the movable iron core and the magnetism isolating tube is reduced, and the early failure risk and the maintenance cost of a product are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile brake, concretely relates to a valve core subassembly for pneumatic pressure line brake valve. BACKGROUND

[0002] In the traditional brake system in the field of automobile brake, the transmission of brake force and brake signal is completed through mechanical structure connection, and is driven through oil pressure or air pressure, since the element of design mechanism is more, brake speed is slower.Line control technology is a kind of technology that control signal is transmitted by wire or electric signal, replaces the hard connection of traditional mechanical connecting device to realize control, and line control brake has the advantages of faster response speed, better brake efficiency and higher safety compared with traditional brake control structure.

[0003] In the pneumatic pressure line brake system, usually rely on the frequent opening and closing of valve core subassembly to realize the pressure increase, pressure maintenance and pressure reduction of pneumatic pressure line brake valve product.As the switch actuating mechanism of air path opening and closing, the structure and performance of valve core subassembly directly affect the reliability and service life of pneumatic pressure line brake valve, and it is a very important part in the structural function design of pneumatic pressure line brake valve.

[0004] At present, the moving iron core and the magnetic isolation tube of the valve core subassembly in the common pneumatic pressure line brake valve product in the market directly contact when the valve core acts, and the electromagnetic force drives the moving iron core to reciprocate in the magnetic isolation tube, and this frequent mutual sliding friction causes the surface of the moving iron core and the magnetic isolation tube to be easy to wear, thereby affecting the sealing property and service life of the valve, increasing the early failure risk of the product and the cost of maintenance;Another scheme is to add a wear-resistant sleeve composed of two arc-shaped plates outside the moving iron core, and the overall diameter of the moving iron core of this scheme is reduced, resulting in reduced magnetic flux, and thereby causing problems such as reduced electromagnetic force and response speed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a valve core subassembly for pneumatic pressure line brake valve, which uses a wear-resistant ring as the wear-resistant medium between the moving iron core and the magnetic isolation tube, has good wear resistance, reduces the wear caused by mutual sliding of the two, and reduces the early failure risk of the product and the cost of maintenance.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A valve core subassembly for pneumatic pressure line brake valve, comprising a moving iron core and a wear-resistant ring, the cylindrical surface of the moving iron core is provided with two circular ring grooves, the wear-resistant ring is provided with a vertical opening to be fitted and installed in the circular ring groove, and the material of the wear-resistant ring is PTEE.

[0008] Preferably, a magnetic isolation pipe is sleeved on the cylindrical surface of the moving iron core, and the outer surface of the wear-resistant ring protrudes and is in sliding contact with the inner circumferential wall of the magnetic isolation pipe.

[0009] Preferably, a static iron core is arranged above the moving iron core, one end of the static iron core is arranged in the magnetic isolation pipe, and the adjacent positions of the moving iron core and the static iron core are located in the magnetic isolation pipe.

[0010] Preferably, a stroke damping pad is arranged at the top of the moving iron core, and the stroke damping pad plays a buffering role at the end of the moving iron core close to the static iron core.

[0011] Preferably, a valve seat is arranged below the moving iron core, and the valve seat is arranged at the lower end of the magnetic isolation pipe and is provided with a gas passage.

[0012] Preferably, a reset spring is sleeved at the lower end of the moving iron core, and the two ends of the reset spring abut against the magnetic isolation pipe and the valve seat respectively.

[0013] Preferably, a reset damping pad is arranged at the bottom of the moving iron core, and the reset damping pad plays a buffering role when the moving iron core is close to the valve seat downward.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. The utility model discloses a circular groove is arranged on the surface of the moving iron core, the wear-resistant ring is arranged in the circular groove, the surface of the wear-resistant ring is higher than the 5 cylindrical surface of the moving iron core, and the inner surface of the magnetic isolation pipe is in sliding contact, so that the abrasion between the moving iron core and the magnetic isolation pipe due to mutual sliding is reduced.

[0016] 2. The utility model discloses that the size cooperation between the wear-resistant ring and the magnetic isolation pipe ensures that the moving iron core does not produce excessive shaking, and a certain gap exists between the wear-resistant ring and the magnetic isolation pipe, so that the free sliding of the moving iron core after assembly is guaranteed, and the moving iron core is prevented from being stuck.

[0017] 3. The utility model discloses that the wear-resistant ring is fixed through the circular groove, the overall diameter of the moving iron core is guaranteed unchanged, the magnetic flux is prevented from being reduced, and problems such as electromagnetic force and response speed reduction are avoided. DRAWINGS

[0018] The drawings are used to provide further understanding of the utility model and constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0019] Figure 1 The utility model provides a valve core assembly for a pneumatic line control valve for the sectional view;

[0020] Figure 2 The utility model discloses a valve core assembly for a pneumatic line control valve for the sectional view; Figure 1 The utility model discloses a valve core assembly for a pneumatic line control valve for the sectional view;

[0021] Figure 3 For Figure 1 Schematic view of the wear-resistant ring.

[0022] In the figure: 1, static core; 2, stroke damping pad; 3, magnetic isolation tube; 4, wear-resistant ring; 5, moving core; 501, circular groove; 6, return spring; 7, return damping pad; 8, valve seat. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] For details, please refer to Figures 1-3 The valve core assembly for the air pressure line control valve provided by the present application comprises a moving core 5 and a wear-resistant ring 4, a cylindrical surface of the moving core 5 is provided with two circular grooves 501, the wear-resistant ring 4 is provided with a vertical opening 401 so as to be fitted and installed in the circular groove 501, and the wear-resistant ring 4 is made of PTEE.

[0025] In the embodiment, the vertical opening simplifies the installation and dismounting process of the wear-resistant ring 4, while ensuring the stability of the wear-resistant ring 4 in the circular groove 501. The wear-resistant ring 4 made of PTEE significantly reduces the friction and wear between the moving core 5 and the magnetic isolation tube 3, and prolongs the service life of the valve core assembly.

[0026] For details, please refer to Figures 1-3 The moving core 5 is provided with the magnetic isolation tube 3 on the cylindrical surface, and the outer surface of the wear-resistant ring 4 protrudes and is in sliding contact with the inner circumferential wall of the magnetic isolation tube 3.

[0027] In the embodiment, the magnetic isolation tube 3 provides a stable movement environment for the moving core 5, so as to ensure that the moving core 5 will not deviate or shake during movement. The sliding contact between the wear-resistant ring 4 and the inner wall of the magnetic isolation tube 3 reduces direct friction, prolongs the service life of the magnetic isolation tube 3, and the material and design of the magnetic isolation tube 3 have a magnetic shielding effect, which can effectively isolate the interference of the external magnetic field on the valve core assembly.

[0028] For details, please refer to Figures 1-3 The moving core 5 is provided with the static core 1 above, one end of the static core 1 is arranged in the magnetic isolation tube 3, and the adjacent positions of the moving core 5 and the static core 1 are located in the magnetic isolation tube 3.

[0029] In this embodiment, the static iron core 1 is connected with the magnetic isolation tube 3, forming a complete support system, ensuring the overall structural stability of the valve core assembly, and the setting of the static iron core 1 can optimize the electromagnetic field distribution and improve the response speed and control accuracy of the electromagnetic valve.

[0030] For details, please refer to Figures 1-3 , the top of the moving iron core 5 is provided with a stroke damping pad 2, which plays a buffering role at the end of the moving iron core 5 close to the static iron core 1.

[0031] In this embodiment, the stroke damping pad 2 can effectively absorb the impact and vibration of the moving iron core 5 during movement.

[0032] For details, please refer to Figures 1-3 , the moving iron core 5 is provided below the valve seat 8, which is arranged at the lower end of the magnetic isolation tube 3 and is provided with a gas passage.

[0033] In this embodiment, the valve seat 8 is connected with the magnetic isolation tube 3, forming a complete support system, ensuring the overall structural stability of the valve core assembly, and the valve seat 8 realizes the sealing performance of the valve core assembly, reduces gas leakage, and ensures the efficient operation of the brake system.

[0034] For details, please refer to Figures 1-3 , the moving iron core 5 is provided below the valve seat 8, which is arranged at the lower end of the magnetic isolation tube 3 and is provided with a gas passage.

[0035] In this embodiment, the reset spring 6 ensures that the moving iron core 5 can be quickly reset after braking is completed, improving the response speed and reliability of the brake system.

[0036] For details, please refer to Figures 1-3 , the bottom of the moving iron core 5 is provided with a reset damping pad 7, which plays a buffering role when the moving iron core 5 is close to the valve seat 8.

[0037] In this embodiment, the reset damping pad 7 can effectively absorb the impact and vibration of the moving iron core 5 during reset.

[0038] The working process of the present scheme is that the electromagnetic coil outside the valve core assembly is energized to generate electromagnetic force, the electromagnetic force acts on the moving iron core 5 to overcome the elastic force of the return spring 6, drive the moving iron core 5 to move in the magnetic isolation tube 3 to the direction of the static iron core 1, when the moving iron core 5 moves, the wear-resistant ring 4 on the surface thereof slides in contact with the inner wall of the magnetic isolation tube 3 to reduce friction and wear, the moving iron core 5 moves to the direction of the static iron core 1, the gas passage on the valve seat 8 is opened, the gas flows out through the gas passage on the valve seat 8, when the moving iron core 5 moves to the direction of the static iron core 1, the travel shock pad 2 at one end of the moving iron core 5 close to the static iron core 1 plays a buffering role to reduce impact and vibration, when the moving iron core 5 moves close to the valve seat 8, the return shock pad 7 at the bottom of the moving iron core 5 plays a buffering role to reduce impact and vibration, when the electromagnetic coil is de-energized, the electromagnetic force disappears, the elastic force of the return spring 6 pushes the moving iron core 5 to move downward to make it quickly reset to the initial position, prepare for the next braking action, the moving iron core 5 returns to the initial position under the action of the return spring 6, the gas passage on the valve seat 8 is closed, the gas stops flowing out through the gas passage on the valve seat 8, the braking process is ended, the system returns to the standby state, and is ready to receive the next braking signal.

[0039] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A spool assembly for a pneumatic line control brake valve, characterized by, Including moving iron core (5) and wear ring (4), the cylindrical surface of the moving iron core (5) is provided with two circular grooves (501), the wear ring (4) is provided with a vertical opening (401), and the wear ring (4) is matched and installed in the circular groove (501), and the wear ring (4) is made of PTEE.

2. A spool valve assembly for a pneumatic line control brake valve according to claim 1, characterized in that The moving iron core (5) is sleeved with a magnetic isolation tube (3) on the cylindrical surface, and the outer surface of the wear ring (4) protrudes and is in sliding contact with the inner wall of the magnetic isolation tube (3).

3. A spool valve assembly for a pneumatic line control brake valve according to claim 2, wherein, The moving iron core (5) is provided with a static iron core (1) above, one end of the static iron core (1) is arranged in the magnetic isolation tube (3), and the adjacent positions of the moving iron core (5) and the static iron core (1) are located in the magnetic isolation tube (3).

4. A spool valve assembly for a pneumatic line control brake valve according to claim 3, wherein, The moving iron core (5) is provided with a stroke damping pad (2) at the top, and the stroke damping pad (2) plays a buffering role at the end of the moving iron core (5) close to the static iron core (1).

5. A spool valve assembly for a pneumatic line control brake valve according to claim 4, wherein, The moving iron core (5) is provided with a valve seat (8) below, the valve seat (8) is arranged at the lower end of the magnetic isolation tube (3) and is provided with a gas passage.

6. A spool valve assembly for a pneumatic line control brake valve according to claim 5, wherein, The moving iron core (5) is sleeved with a reset spring (6) at the lower end, and the two ends of the reset spring (6) abut against the magnetic isolation tube (3) and the valve seat (8) respectively.

7. A spool valve assembly for a pneumatic line control brake valve according to claim 6, wherein, The moving iron core (5) is provided with a reset damping pad (7) at the bottom, and the reset damping pad (7) plays a buffering role when the moving iron core (5) is close to the valve seat (8) downward.

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