A low power reversing ASR valve

Abstract

The present invention discloses a low-power reversing ASR valve, which belongs to the field of vehicle braking technology. The low-power reversing ASR valve includes a valve body, a valve seat, a valve, a moving iron core assembly, an enameled wire skeleton, a coil winding and a plug, and also includes: a static iron core, the outer wall of which has barbs, a tube hole inside the static iron core, and is connected to an exhaust port; a copper tube, the moving iron core assembly is used to block the tube hole of the static iron core, the side wall of the moving iron core assembly is provided with a through groove, and a reset spring is provided outside the moving iron core assembly; an air vent, one end of which is connected to the through groove; a first valve port, which can be blocked by the moving iron core assembly; a cavity, the cavity is connected to the air vent, and the cavity is also connected to a second air inlet and an air outlet, and a valve is slidably connected in the cavity, and the valve is used to block the air vent or the second air inlet. The low-power reversing ASR valve of the present invention integrates the high-power ASR solenoid valve and the two-way one-way valve in the traditional vehicle braking system, and has both air source direct working mode and electromagnetic working mode.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle braking, and in particular to a low-power reversing ASR valve. Background Art

[0002] The existing vehicle braking technology adjusts the vehicle's brake air pressure through an actuator. ASR solenoid valves and two-way single-way valves are the core components of the actuator. The ASR solenoid valve can ventilate quickly when powered on, and the two-way single-way valve eliminates the problem of choosing one path for effective braking when two air paths are simultaneously supplied with air. In the prior art, conventional ASR solenoid valves and two-way single-way valves are connected together through pipe joints and high-pressure hoses, and it is easy to connect the wrong pipe joints during installation, causing air path turbulence and increasing production and testing costs.

[0003] Conventional ASR solenoid valves have the following disadvantages: high power consumption, short circuits are prone to occur during long-term braking, causing brake failure; there is no buffer spring, the life of the moving iron core assembly is short, the wire package assembly of the conventional ASR solenoid valve is connected to the valve body by riveting, and it is difficult and costly to replace damaged internal parts; the mechanical properties are unstable, resulting in braking skidding, increasing the safe driving distance of the vehicle, and affecting braking safety. The conventional two-way single-way valve adopts a shuttle structure, and the shuttle movement displacement is large during braking, and the outer circle is severely worn; the clearance with the shuttle sleeve is large, and there is a tendency to rotate during axial movement, resulting in poor sealing surface fit, easy leakage, and the components are not modularized. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems in the prior art and provide a low-power reversing ASR valve, which integrates the high-power ASR solenoid valve and the two-way one-way valve in the traditional brake system, and has both air source direct working mode and electromagnetic working mode. Thereby, the integration degree of the vehicle braking system is improved, the number of components used in the vehicle braking system is reduced, and the cost of the vehicle braking system is reduced, and the reliability of the vehicle braking system is improved. The present invention has the characteristics of modular production, low production difficulty and low cost.

[0005] The present invention provides a low-power reversing ASR valve, including a valve body, a valve seat, a valve, a moving iron core assembly, an enameled wire skeleton, a coil winding and a plug, and also includes:

[0006] A static iron core is arranged in the enameled wire skeleton, the outer wall of the static iron core is provided with barbs, and the interior of the static iron core is provided with a tube hole connected with an exhaust port;

[0007] A copper tube is arranged in the enameled wire skeleton, the moving iron core assembly is slidably connected in the copper tube, the moving iron core assembly is used to block the tube hole of the static iron core, a through groove is arranged on the side wall of the moving iron core assembly, a return spring is arranged outside the moving iron core assembly, and the through groove can be connected with the tube hole of the static iron core;

[0008] A vent hole is provided in the valve seat, and the vent hole is communicated with the through groove;

[0009] a first valve port, connected to the through slot, wherein the first valve port can be blocked by the moving iron core assembly;

[0010] The cavity is arranged in the valve body, the cavity is connected with the vent hole, and the cavity is also connected with the second air inlet and the air outlet. The valve is slidably connected in the cavity, and the valve is used to block the vent hole or the second air inlet.

[0011] Preferably, a sliding hole is provided in the moving iron core assembly, the top end of the sliding hole is slidably connected to an upper sealing plug, the bottom end of the sliding hole is slidably connected to a lower sealing plug, the upper sealing plug is used to seal the static iron core tube hole, the lower sealing plug is used to seal the first valve port, a buffer spring is provided between the upper sealing plug and the lower sealing plug, a first partition is provided at one end of the sliding hole close to the upper sealing plug, and a second partition is provided at one end of the sliding hole close to the lower sealing plug, the first partition is used to limit the movement of the upper sealing plug, and the second partition is used to limit the movement of the lower sealing plug.

[0012] Preferably, the valve is provided with a sealing lip, the sealing lip is in contact with the outer wall of the valve seat, and the sealing lip is used for unidirectional conduction from the vent hole to the cavity.

[0013] Preferably, the inner wall of the sealing lip is provided with a plurality of annular grooves, and grease is provided in the annular grooves.

[0014] Preferably, a slot is provided outside the copper tube, and a radial spring is provided inside the slot, and the radial spring is used to limit the axial movement and radial shaking of the copper tube.

[0015] Preferably, the outer wall of the bottom end of the moving iron core assembly is provided with a step surface, the structural shape of the return spring is conical, the end of the return spring with a smaller outer diameter touches the step surface of the moving iron core assembly, and the end of the return spring with a larger outer diameter touches the bottom end of the copper tube.

[0016] Preferably, the plug comprises a socket and a pin, the pin is provided with a crimping piece, and the coil winding is connected to the crimping piece by both crimping and welding.

[0017] Preferably, a dustproof sheet is provided on the coil winding.

[0018] Preferably, a magnetic conductive plate is further provided on the outside of the coil winding.

[0019] Preferably, the coil assembly and the valve body are connected by bolts.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the low-power reversing ASR valve of the present invention integrates the high-power ASR solenoid valve and the two-way one-way valve in the traditional brake system, and has both the air source direct working mode and the electromagnetic working mode. Thus, the integration degree of the vehicle braking system is improved, the number of components used in the vehicle braking system is reduced, and the cost of the vehicle braking system is reduced, and the reliability of the vehicle braking system is improved. In addition, the present invention has the characteristics of modular production, low production difficulty and low cost.

[0021] The moving iron core assembly is equipped with an upper sealing plug, a lower sealing plug, and a buffer spring. When the moving iron core assembly moves, the buffer spring can relieve the impact force of the upper sealing plug on the static iron core, and can also relieve the impact force of the lower sealing plug on the valve seat. When the upper sealing plug or the lower sealing plug cannot return to its original shape due to excessive compression, the buffer spring can drive the upper sealing plug or the lower sealing plug to move, thereby effectively ensuring the sealing performance of the upper sealing plug or the lower sealing plug. This structure can effectively increase the sealing effect and service life, and can also reduce working noise.

[0022] The special design structure of the valve seat realizes the function of two-way single-pass, and the lip of the valve sealing lip improves the traditional face seal to a multi-layer linear lip seal structure, making the sealing performance far beyond that of ordinary rubber parts and more stable. This design method is better and more effective than the face seal method, greatly improving the sealing reliability. Multiple annular grooves can store grease. When the valve and the valve seat move relative to each other, the multi-layer structure at the lip of the sealing lip greatly reduces the resistance, making the valve opening pressure smaller. Even if the lip of the sealing lip is worn, the multi-layer linear seal structure will assist the seal under the action of air pressure and increase reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the gas source direct working mode of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the electromagnetic working form of the present invention;

[0027] Figure 5 It is a schematic diagram of the plug structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the moving iron core assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the moving iron core assembly of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the static iron core of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the copper tube of the present invention;

[0032] Fig.10 It is a structural schematic diagram of the valve of the present invention;

[0033] Fig.11 It is a schematic structural diagram of the radial spring of the present invention.

[0034] Description of reference numerals:

[0035] 101. Valve body, 102. Valve seat, 103. Moving iron core assembly, 104. Enameled wire skeleton, 105. Static iron core, 106. Through slot, 107. Coil winding, 108. First valve port, 109. Air vent, 110. First air inlet, 111. Cavity, 112. Second air inlet, 113. Exhaust port, 114. Air outlet, 115. Valve, 116. Pipe hole, 201 . Sliding hole, 202. Upper sealing plug, 203. Lower sealing plug, 204. Buffer spring, 205. First barrier, 206. Second barrier, 3. Sealing lip, 4. Annular groove, 501. Copper tube, 502. Radial spring, 503. Return spring, 504. Step surface, 505. Card slot, 601. Pin, 602. Crimp piece, 603. Socket, 7. Dustproof sheet, 8. Magnetic plate. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-9 , the specific implementation of the present invention is described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific implementation. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] like Figure 1-4As shown, a low-power reversing ASR valve provided by the present invention includes a valve body 101, a valve seat 102, a valve 115, a moving iron core assembly 103, an enameled wire skeleton 104, a coil winding 107 and a plug, and also includes: a static iron core 105, a copper tube 501, a vent 109, a first valve port 108 and a cavity 111, the static iron core 105 is arranged in the enameled wire skeleton 104, the outer wall of the static iron core 105 is provided with barbs, and the static iron core 105 has a tube hole 116 inside, which is connected to the exhaust port 113; the copper tube 501 is arranged in the enameled wire skeleton 104, the moving iron core assembly 103 is slidably connected in the copper tube 501, and the moving iron core assembly 103 is used to block the tube hole 116 of the static iron core 105, A through slot 106 is provided on the side wall of the moving iron core assembly 103, and a reset spring 503 is provided outside the moving iron core assembly 103. The through slot 106 can be communicated with the tube hole 116 of the static iron core 105; an air vent 109 is provided in the valve seat 102, and the air vent 109 is communicated with the through slot 106; a first valve port 108 is communicated with the through slot 106, and the first valve port 108 can be blocked by the moving iron core assembly 103; a cavity 111 is provided in the valve body 101, and the cavity 111 is communicated with the air vent 109, and the cavity 111 is also connected with a second air inlet 112 and an air outlet 114, and a valve 115 is slidably connected in the cavity 111, and the valve 115 is used to block the air vent 109 or the second air inlet 112.

[0039] The working principle of Example 1 is now briefly described:

[0040] Preferably, the valve body 101 is provided with a first air inlet 110, the first air inlet 110 is communicated with the first valve port 108, the second air inlet 112 and the air outlet 114 are also provided on the valve body 101, and the air outlet 114 is communicated with the cavity 111. The coil assembly includes an enameled wire skeleton 104, a coil winding 107 and a plug, the enameled wire skeleton 104 is provided with a channel, and the static iron core 105 and the copper tube 501 are both provided in the channel.

[0041] Furthermore, the outer wall of the valve seat 2 is provided with a sealing ring groove, and an elastic sealing ring is provided in the sealing ring groove. Barbs are provided on the outer diameter of the static iron core 5, and the barbs 52 face the direction of the moving iron core assembly 103 to prevent the interaction force between the moving iron core assembly 103 and the static iron core 5 from causing the static iron core 5 to move toward the moving iron core assembly 103.

[0042] A low-power reversing ASR valve of the present application has two working modes:

[0043] The first working mode is the direct working mode of gas source. Figure 1 and 3: The external gas source pushes the valve 115 away from the second gas inlet 112 through the second gas inlet 112. At this time, the second gas inlet 112 is connected with the gas outlet 114 through the cavity 111, and the gas is discharged from the gas outlet 114.

[0044] The second working mode is electromagnetic working mode Figure 1 and 4 : After the coil winding 107 is energized, the coil winding 107 generates magnetic force, thereby driving the moving iron core assembly 103 to move toward the static iron core 105. At this time, the tube hole 116 of the static iron core 105 is blocked by the moving iron core assembly 103, the first valve port 108 is opened and connected to the vent hole 109, the external air source of the first air inlet 110, the gas enters the vent hole 109 through the first air inlet 110 and the first valve port 108, the air pressure in the vent hole 109 increases, the valve 115 moves downward, the second air inlet 112 is closed, and under the action of the air pressure, the sealing lip 3 of the valve 115 opens and disengages from the vent hole 109, the gas enters the cavity 111 through the vent hole 109, and then the gas is discharged through the air outlet 114 to enter the working state.

[0045] When the coil winding 107 is powered off, the magnetic field disappears, and under the action of the reset spring 503 , the first valve port 108 is closed, the tube hole 116 is opened, and the gas in the vent hole 109 can be discharged from the exhaust port 113 through the through groove 106 and the tube hole 116 .

[0046] The low-power reversing ASR valve of the present invention integrates the high-power ASR solenoid valve and the two-way one-way valve in the traditional brake system, and has both the air source direct working mode and the electromagnetic working mode. Thus, the integration degree of the vehicle braking system is improved, the number of components used in the vehicle braking system is reduced, and the cost of the vehicle braking system is reduced, and the reliability of the vehicle braking system is improved. In addition, the present invention has the characteristics of modular production, low production difficulty and low cost.

[0047] Embodiment 2:

[0048] On the basis of Example 1, in order to prevent the moving iron core assembly 103 from making hard contact with the stationary iron core 105 and the valve seat 102 during operation, the service life of the entire reversing ASR valve is thereby increased.

[0049] like Figure 2 and 6As shown, a sliding hole 201 is provided in the moving iron core assembly 103, and an upper sealing plug 202 is slidably connected to the top of the sliding hole 201, and a lower sealing plug 203 is slidably connected to the bottom of the sliding hole 201. The upper sealing plug 202 is used to seal the tube hole of the static iron core 105, and the lower sealing plug 203 is used to seal the first valve port 108. A buffer spring 204 is provided between the upper sealing plug 202 and the lower sealing plug 203, and a first partition 205 is provided at one end of the sliding hole 201 close to the upper sealing plug 202, and a second partition 206 is provided at one end of the sliding hole 201 close to the lower sealing plug 203. The first partition 205 is used to limit the movement of the upper sealing plug 202, and the second partition 206 is used to limit the movement of the lower sealing plug 203.

[0050] Since the moving iron core assembly 103 of the reversing ASR valve has a large impact on the stationary iron core 105 and the valve seat 102 when in operation, the life of the moving iron core assembly 103, the valve seat 102 and the stationary iron core 105 will be affected after long-term operation. By providing an upper sealing plug 202, a lower sealing plug 203 and a buffer spring 204, when the moving iron core assembly 103 moves to contact the static iron core 105, the upper sealing plug 202 on the moving iron core assembly 103 will abut against the tube hole of the static iron core 105, thereby sealing the static iron core 105. At the same time, since the upper sealing plug 202 can produce relative sliding in the sliding hole 201, the impact of the static iron core 105 and the entire moving iron core assembly 103 can be reduced under the buffering action of the buffer spring 204. Similarly, when the moving iron core assembly 103 moves to the point where the lower sealing plug 203 on the moving iron core assembly 103 blocks the first valve port 108, the buffer spring 204 can also buffer the impact of the moving iron core assembly 103 and the valve seat 102, thereby reducing the damage to the static iron core 105, the moving iron core assembly 103 and the valve seat 102 caused by the impact force, thereby improving the service life of the entire reversing ASR valve and reducing working noise.

[0051] Embodiment 3:

[0052] On the basis of Embodiment 1, under the action of gas pressure, the gas can only flow unidirectionally from the vent hole 109 to the cavity 111 , thereby improving the air tightness of the sealing lip 3 .

[0053] like Figure 2-4 As shown in FIG. 10 , the valve 115 is provided with a sealing lip 3 , and the sealing lip 3 is in contact with the outer wall of the valve seat 102 , and the sealing lip 3 is used for unidirectional conduction from the vent hole 109 to the cavity 111 .

[0054] By setting the sealing lip 3, it is ensured that the gas can flow from the vent hole 109 to the cavity 111. When the gas flows in the air direction, the sealing lip 3 can play an effective blocking role. Thus, the one-way conduction of the gas is realized, and the normal operation of the device is ensured. The cross section of the sealing lip 3 is inverted trapezoidal, with a smaller upper opening, tightly hugging the valve seat 102, and having a pre-sealing effect. Under the action of air pressure, the gas can only flow from the vent hole 109 to the cavity 111 in a one-way manner, thereby improving the air tightness of the sealing lip 3.

[0055] As a preferred solution, Fig.10 As shown, the inner wall of the sealing lip 3 is provided with a plurality of annular grooves 4, and grease is provided in the annular grooves 4. The plurality of annular grooves 4 of the sealing lip 3 form a multi-layer linear lip sealing structure at the lip of the sealing lip 3. The sealing lip of the valve improves the traditional face seal into a multi-layer linear lip sealing structure, so that the sealing performance far exceeds that of general rubber parts and is more stable. This design method has better and more effective sealing than the face seal method, greatly increases the sealing performance of the product, and improves the stability and safety of vehicle braking. The use of multi-layer linear sealing strips, like multi-layer sealing rings, provides multi-layer protection for the seal and improves the sealing reliability. Grease can be stored in the annular groove 4. When the valve 115 moves relative to the valve seat 102, the multi-layer structure at the sealing lip greatly reduces the resistance, so that the opening pressure of the valve 115 is smaller. In addition, in terms of wear, if wear occurs, the multi-layer linear sealing structure will assist the seal under the action of air pressure and increase reliability.

[0056] As a preferred solution, Figure 1 and 9 As shown, the copper tube 501 is provided with a slot 505, and the slot 505 is provided with a radial spring 502, and the radial spring 502 is used to limit the axial movement and radial shaking of the copper tube. By providing the radial spring 502, the copper tube 501 can be prevented from falling off from the enameled wire skeleton 104, ensuring the modular production of the device and the normal operation with stable working performance.

[0057] As a preferred solution, Figure 2-4 , 6 and 7, wherein the outer wall of the bottom end of the moving iron core assembly 103 is provided with a step surface 504, the structure and shape of the return spring 503 is conical, the end of the return spring 503 with a smaller outer diameter touches the step surface 504 of the moving iron core assembly 103, and the end of the return spring 503 with a larger outer diameter touches the bottom end of the copper tube 501. Under the action of the return spring 503, the tube hole 116 can be in a normally open state, and the first valve port 108 can be in a normally closed state, thereby meeting the use requirements.

[0058] As a preferred solution, Figure 1 and 4As shown, the plug includes a socket 603 and a plug pin 601, the plug pin 601 is provided with a crimping piece 602, and the coil winding 107 is connected to the crimping piece 602 by both crimping and welding. By connecting the crimping piece 602 and the coil winding 107 by both crimping and welding, it is possible to prevent the coil winding 107 and the crimping piece 602 from being poorly soldered or in poor contact, thereby ensuring the reliability of the electrical connection between the plug pin 601 and the coil winding 107.

[0059] As a preferred solution, Figure 1 As shown, a dustproof sheet 7 is provided on the coil winding 107. By providing the dustproof sheet 7, water vapor and dust in the environment can be prevented from entering the valve body 101 to cause damage to the coil winding 107, the moving iron core assembly 103 and the valve 115.

[0060] As a preferred solution, Figure 1 As shown, a magnetic conductive plate 8 is further provided outside the coil winding 107. By providing the magnetic conductive plate 8, the magnetic field can be gathered, so that the moving iron core assembly 103 is convenient to be attracted.

[0061] As a preferred solution, Figure 1 As shown, the coil assembly is connected to the valve body 101 by bolts. By connecting the coil assembly to the valve body 101 by bolts, the disassembly and maintenance of the reversing ASR valve is facilitated.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-power reversing ASR valve, comprising a valve body (101), a valve seat (102), a valve (115), a moving iron core component (103) and a coil assembly, characterized in that: Also includes: A static iron core (105) is disposed in the enameled wire skeleton (104) of the coil assembly, the outer wall of the static iron core (105) is provided with barbs, and the interior of the static iron core (105) is provided with a tube hole (116) connected to an exhaust port (113); A copper tube (501) is arranged in the enameled wire skeleton (104), the moving iron core assembly (103) is slidably connected in the copper tube (501), the moving iron core assembly (103) is used to block the tube hole (116) of the static iron core (105), a through groove (106) is provided on the side wall of the moving iron core assembly (103), a return spring (503) is provided outside the moving iron core assembly (103), and the through groove (106) can be connected to the tube hole (116) of the static iron core (105); A vent hole (109) is provided in the valve seat (102), and the vent hole (109) is communicated with the through groove (106); A first valve port (108) is communicated with the through groove (106), and the first valve port (108) can be blocked by the moving iron core assembly (103); A cavity (111) is disposed in the valve body (101); the cavity (111) is in communication with the vent hole (109); the cavity (111) is also in communication with a second air inlet (112) and an air outlet (114); a valve (115) is slidably connected in the cavity (111); the valve (115) is used to block the vent hole (109) or the second air inlet (112); The movable iron core assembly (103) is provided with a sliding hole (201), the top end of the sliding hole (201) is slidably connected to an upper sealing plug (202), the bottom end of the sliding hole (201) is slidably connected to a lower sealing plug (203), the upper sealing plug (202) is used to block the tube hole of the static iron core (105), the lower sealing plug (203) is used to block the first valve port (108), a buffer spring (204) is provided between the upper sealing plug (202) and the lower sealing plug (203), a first baffle (205) is provided at one end of the sliding hole (201) close to the upper sealing plug (202), and a second baffle (206) is provided at one end of the sliding hole (201) close to the lower sealing plug (203), the first baffle (205) is used to limit the movement of the upper sealing plug (202), and the second baffle (206) is used to limit the movement of the lower sealing plug (203); The outer wall at the bottom end of the moving iron core assembly (103) is provided with a step surface (504); the structure of the return spring (503) is conical; the end of the return spring (503) with a smaller outer diameter contacts the step surface (504) of the moving iron core assembly (103); and the end of the return spring (503) with a larger outer diameter contacts the bottom end of the copper tube (501).

2. A low-power reversing ASR valve as claimed in claim 1, characterized in that: The valve (115) is provided with a sealing lip (3), the sealing lip (3) being in contact with the outer wall of the valve seat (102), and the sealing lip (3) being used for one-way conduction from the vent hole (109) to the cavity (111).

3. A low-power reversing ASR valve as claimed in claim 2, characterized in that: The inner wall of the sealing lip (3) is provided with a plurality of annular grooves (4), and lubricating grease is provided in the annular grooves (4).

4. A low-power reversing ASR valve as claimed in claim 1, characterized in that: A clamping groove (505) is provided outside the copper tube (501), and a radial spring (502) is provided inside the clamping groove (505). The radial spring (502) is used to limit the axial movement and radial shaking of the copper tube.

5. A low-power reversing ASR valve as claimed in claim 1, characterized in that: The coil assembly comprises a socket (603) and a plug pin (601), the plug pin (601) being provided with a crimping piece (602), and the coil winding (107) of the coil assembly being connected to the crimping piece (602) by both crimping and welding.

6. A low-power reversing ASR valve as claimed in claim 5, characterized in that: A dustproof sheet (7) is provided on the coil winding (107).

7. A low-power reversing ASR valve as claimed in claim 5, characterized in that: A magnetic conductive plate (8) is also provided on the outside of the coil winding (107).

8. A low-power reversing ASR valve as claimed in claim 1, characterized in that: The coil assembly and the valve body (101) are connected via bolts.

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