Hydraulic double-state electromagnetic valve for automobile braking system

Abstract

The utility model relates to a hydraulic double-state electromagnetic valve for an automobile braking system, and belongs to the field of electromagnetic valves for automobile braking systems. The valve core is arranged in the valve body, the valve core compresses the reset spring and then is fixedly connected with the movable iron core, the valve seat is pressed into the bottom of the valve body, the filter screen is embedded into the tail portion of the valve body, the movable iron core is in sliding connection with the metal guide sleeve, the static iron core is fixedly connected with the upper portion of the metal guide sleeve, and the O-shaped sealing ring is connected to the valve body in a sleeved mode. The electromagnetic valve has the advantages that the electromagnetic valve is novel in structure and is of a two-position three-way electromagnetic valve structure, the electromagnetic valve can be opened and closed after the electromagnetic coil is powered on, the electromagnetic valve is used for switching hydraulic oil flow channels of a braking system and can replace a normally-opened valve and a normally-closed valve in the prior art, the action response characteristic of the hydraulic braking system is improved, and the service life of the hydraulic braking system is prolonged. Functions are achieved accurately and reliably, meanwhile, cost is reduced, and the overall layout of a hydraulic system is improved.

Description

Technical Field

[0001] The utility model belongs to the field of electromagnetic valves for automobile braking systems, in particular to a hydraulic dual-state electromagnetic valve for automobile braking systems. Background Art

[0002] At present, the solenoid valves used in automobile braking systems are mainly normally open and normally closed, which realize the on and off of hydraulic pressure to switch the flow path. A solenoid valve is either a normally open valve or a normally closed valve. There will be a certain time difference when the flow path is switched and the normally open and normally closed solenoid valves are controlled to work at the same time. As the functions realized by the hydraulic braking system become more and more complex, the number of solenoid valves will also increase, and the control will also be more complicated, resulting in more failure modes and higher costs. Summary of the invention

[0003] The utility model provides a hydraulic dual-state electromagnetic valve for an automobile braking system, so as to solve the existing problems of a certain time difference in action response and relatively complex control.

[0004] The technical scheme adopted by the utility model is to include a static iron core, a metal guide sleeve, a moving iron core, a reset spring, a valve body, a valve core, an O-ring one, a valve seat, a filter screen and an O-ring two, wherein the interior of the valve body is a hollow structure serving as a movement space for the valve core, and after the valve core compresses the reset spring, the upper part passes through the reserved hole of the moving iron core and is fixedly connected with it by hot melting, the valve seat is pressed into the bottom of the valve body, and the filter screen is embedded in the tail of the valve body, the lower part of the metal guide sleeve is fixedly connected to the upper part of the valve body, the moving iron core is slidably connected to the metal guide sleeve, the static iron core is fixedly connected to the upper part of the metal guide sleeve, one O-ring set is connected to the valve body between the flow channel opening A and the flow channel opening B, and the second O-ring set is connected to the valve body below the flow channel opening B.

[0005] The fixed connection mode of the static iron core and the metal guide sleeve is laser welding.

[0006] The metal guide sleeve and the valve body are fixedly connected by laser welding.

[0007] The valve body includes a flow channel opening A, a flow channel opening B, a first flow channel and a curved surface, wherein the first flow channel is connected to the flow channel opening A and the flow channel opening B, and the curved surface is located on the inner wall between the flow channel opening A and the flow channel opening B. The curved surface cooperates with the smooth sealing arc surface of the valve core to seal, and after sealing, it is used to close the valve opening E and block the first flow channel.

[0008] The valve core includes a guide section, a spring support seat, a smooth sealing arc surface, an opening, a guide body, and a sealing cone surface, wherein the guide section is slidably connected to the valve body and plays a guiding role during movement. The shoulder at the upper end of the guide section is hot-melt connected to the moving iron core after positioning. A reset spring is placed on the spring support seat. A circle of smooth sealing arc surfaces cooperates with the arc surface of the inner wall of the valve body to form a valve port E and realize a sealing function. The openings are evenly arranged at 120 degrees around the axis of the valve core. When the valve port E is open, it is a space for liquid flow and does not hinder the liquid. The guide body is naturally formed after the opening processing is completed and plays a guiding role. The sealing cone surface cooperates with the valve seat to form a valve port F and realize a sealing function.

[0009] The valve seat has a second flow channel inside, a flow channel opening C at the bottom, and a valve opening F formed by cooperation between the top valve seat opening and the sealing cone surface of the valve core.

[0010] The axial clearance between the moving iron core and the valve body in the static state should be greater than 0 to ensure that the valve core can be tightly pressed against the valve seat under the action of the return spring to close the valve port F.

[0011] After the moving iron core and the static iron core are energized and attracted, the axial clearance in the static state is greater than 0, ensuring that the valve core can be tightly pressed against the valve body under the action of suction to close the valve port E.

[0012] When no electricity is supplied, the valve core is tightly pressed against the valve seat under the action of the thrust of the return spring, keeping the valve port F closed and the valve port E open, so that the flow ports A and B are unobstructed, that is, the first flow channel is connected, and the flow ports B and C are blocked, that is, the second flow channel is closed.

[0013] When power is turned on, the static iron core is magnetized by the electromagnetic coil, generating a magnetic field force that causes the moving iron core to drive the valve core to overcome the thrust of the reset spring and move upward, closing valve port E. At the same time, valve port F is opened, and the flow channel ports A and B are blocked, while the flow channel ports B and C are connected, and the second flow channel remains unobstructed; when the electromagnetic coil is powered off, the reset spring pushes the valve core back to its initial position, valve port E is opened again, valve port F is closed, the second flow channel is cut off, and the first flow channel returns to the unobstructed state.

[0014] The O-type sealing ring 1 and the O-type sealing ring 2 are sleeved on the valve body to separate the flow channel opening A, the flow channel opening B and the flow channel opening C, and isolate the two chambers to form two sealed independent working chambers.

[0015] The utility model has the advantages of novel structure. It is a two-position three-way solenoid valve structure. After the electromagnetic coil is energized, the solenoid valve can realize two states of open and closed. It is used to realize the switching of the hydraulic oil flow channel of the brake system. It is a key component of the hydraulic brake system. The structural feature is that the default state when it is not powered is the first state, that is, the first flow channel is open and the second flow channel is closed. After power is turned on, the second state is opposite to it, realizing the functions of two solenoid valves, accurately isolating and blocking the system hydraulic pressure for rapid switching. It can replace a normally open valve and a normally closed valve in the past, and realize the opening and closing functions of the normally closed valve and the normally open valve at the same time. There are always two states, one state is normally open, and the other state is normally closed. Normally open and normally closed are switched at the same time, which is equivalent to a normally open valve and a normally closed valve of an ordinary solenoid valve being started at the same time, so that it improves the action response characteristics of the hydraulic brake system, realizes the function accurately and reliably, and reduces the cost at the same time, and improves the overall layout of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model defines no power supply as the first state, and power supply as the second state;

[0017] Figure 1 It is a longitudinal cross-sectional view of the utility model in a first state without power supply;

[0018] In this state, the valve core 6 is stationary, the valve port E is open, the first flow channel 503 is unobstructed, and the first flow channel is opened by default; the valve core 6 is in close contact with the valve seat 8 under the thrust of the return spring 4, the valve port F is closed, and the second flow channel 801 is disconnected, and the second flow channel is closed by default;

[0019] Figure 2 It is a longitudinal cross-sectional view of the utility model in the second state after power is supplied;

[0020] After the electromagnetic coil is energized, the static iron core 1 is magnetized to generate a magnetic field that overcomes the thrust of the return spring 4 and attracts the moving iron core 3 to move upward. The valve core 6 and the valve body 5 are tightly pressed to close the valve port E, and the first flow channel 503 is disconnected; at the same time, the valve core 6 and the valve seat 8 are separated to open the valve port F, and the flow channel C is activated, so that the second flow channel 801 between the flow channel ports B and C is unblocked;

[0021] Figure 3 It is a structural schematic diagram of the valve body of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the valve core of the utility model;

[0023] Figure 5 It is a top view of the valve core of the utility model. DETAILED DESCRIPTION

[0024] See also Figure 1, including a static iron core 1, a metal guide sleeve 2, a moving iron core 3, a reset spring 4, a valve body 5, a valve core 6, an O-ring 1 7, a valve seat 8, a filter screen 9 and an O-ring 2 10, wherein the interior of the valve body 5 is a hollow structure, which serves as a reserved space for the movement of the valve core 6. After the valve core 6 compresses the reset spring 4, the upper part passes through the reserved hole of the moving iron core 3 and is fixedly connected with it by hot melting, the valve seat 8 is pressed into the bottom of the valve body 5, and the filter screen 9 is embedded in the tail of the valve body 5. The lower part of the metal guide sleeve 2 is fixedly connected to the upper part of the valve body 5, the moving iron core 3 is slidably connected to the metal guide sleeve 2, the static iron core 1 is fixedly connected to the upper part of the metal guide sleeve 2, the O-ring 1 7 is sleeved on the valve body 5 between the flow channel opening A501 and the flow channel opening B502, and the O-ring 2 10 is sleeved on the valve body 5 below the flow channel opening B502.

[0025] The fixed connection method of the static iron core 1 and the metal guide sleeve 2 is laser welding.

[0026] The metal guide sleeve 2 and the valve body 5 are fixedly connected by laser welding.

[0027] See also Figure 3 The valve body 5 includes a flow channel opening A501, a flow channel opening B502, a first flow channel 503 and an arc surface 504, wherein the first flow channel 503 is connected to the flow channel opening A501 and the flow channel opening B502, and the arc surface 504 is located on the inner wall between the flow channel opening A501 and the flow channel opening B502, and the arc surface 504 cooperates with the smooth sealing arc surface 603 of the valve core 6 for sealing, and is used to close the valve port E11 and block the first flow channel 503 after sealing.

[0028] See also Figure 4 , 5 The valve core 6 includes a guide section 601, a spring support seat 602, a smooth sealing arc surface 603, an opening 604, a guide body 605, and a sealing cone surface 606, wherein the guide section 601 is slidably connected to the valve body 5 to guide the movement, the shoulder at the upper end of the guide section 601 is hot-melt-connected with the moving iron core 3 after positioning, a reset spring 4 is placed on the spring support seat 602, a circle of smooth sealing arc surface 603 cooperates with the arc surface 504 of the inner wall of the valve body 5 to form a valve port E11 and realize a sealing function, the opening 604 is evenly arranged at 120 degrees around the axis of the valve core 6, and when the valve port E11 is opened, it is a space for liquid flow and does not hinder the liquid, the guide body 605 is naturally formed after the opening 604 is processed, and plays a guiding role, the sealing cone surface 606 cooperates with the valve seat 8 to form a valve port F12 and realize a sealing function.

[0029] The valve seat 8 has a second flow channel 801 inside, a flow channel opening C802 at the bottom, and a valve seat opening 803 at the top cooperates with the sealing cone surface 606 of the valve core 6 to form a valve opening F12.

[0030] The axial clearance between the moving iron core 3 and the valve body 5 in the static state should be greater than 0, to ensure that the valve core 6 can be tightly pressed against the valve seat 8 under the action of the return spring 4 to close the valve port F11.

[0031] After the moving iron core 3 and the stationary iron core 1 are energized and attracted, the axial clearance in the static state is greater than 0, ensuring that the valve core 6 can be tightly pressed against the valve body 5 under the action of suction to close the valve port E12.

[0032] When no power is supplied, the valve core 6 is pressed tightly against the valve seat 8 under the thrust of the return spring 4, keeping the valve port F12 closed and the valve port E11 open, so that the flow ports A and B are unobstructed, that is, the first flow channel is connected, and the flow ports B and C are blocked, that is, the second flow channel is closed.

[0033] When power is turned on, the static iron core 1 is magnetized by the electromagnetic coil 13, generating a magnetic field force that causes the moving iron core 3 to drive the valve core 6 to overcome the thrust of the reset spring 4 and move upward, closing the valve port E. At the same time, the valve port F is opened, the flow channel ports A and B are blocked, and the flow channel ports B and C are connected, and the second flow channel remains unobstructed; when the electromagnetic coil 13 is de-energized, the reset spring 4 pushes the valve core 6 back to the initial position, the valve port E is opened again, the valve port F is closed, the second flow channel is cut off, and the first flow channel returns to the unobstructed state.

[0034] The O-ring 1 7 and the O-ring 2 10 are sleeved on the valve body to separate the flow channel opening A, the flow channel opening B and the flow channel opening C, and isolate the two chambers to form two sealed independent working chambers.

[0035] How it works

[0036] See also Figure 1 When the electromagnetic coil 13 is not energized, the valve core 6 is in close contact with the valve seat 8 under the thrust of the return spring 4, causing the valve port F to close, the second flow channel 801 to be disconnected, and the first flow channel 503 to be opened;

[0037] See also Figure 2 When the electromagnetic coil 13 is energized, the static iron core 1 is magnetized to generate magnetic field force, so that the moving iron core 3 overcomes the thrust of the return spring 4 and moves upward to open the valve port F. The moving iron core 3 is attracted to drive the valve core 6 to move and press tightly against the valve body 5 to close the valve port E, disconnect the first flow channel, and make the second flow channel unblocked.

[0038] When the electromagnetic coil 13 is powered off, the return spring 4 pushes the valve core 6 back to the initial position, the second flow channel is closed, and the first flow channel returns to the unblocked state.

[0039] In summary, the utility model is in a normally open and normally closed functional state when the electromagnetic coil 13 is not energized or energized, that is, one electromagnetic valve can satisfy the normally open electromagnetic valve closing and the normally closed electromagnetic valve opening, thereby realizing the switching of the two flow channel states.

Claims

1. A hydraulic dual-state solenoid valve for an automobile braking system, characterized in that: It includes a static iron core, a metal guide sleeve, a moving iron core, a reset spring, a valve body, a valve core, an O-ring 1, a valve seat, a filter screen and an O-ring 2, wherein the interior of the valve body is a hollow structure serving as the movement space of the valve core. After the valve core compresses the reset spring, the upper part passes through the reserved hole of the moving iron core and is fixedly connected with it by hot melting. The valve seat is pressed into the bottom of the valve body, and the filter screen is embedded in the tail of the valve body. The lower part of the metal guide sleeve is fixedly connected to the upper part of the valve body, the moving iron core is slidably connected to the metal guide sleeve, the static iron core is fixedly connected to the upper part of the metal guide sleeve, one O-ring set is connected to the valve body between the flow channel opening A and the flow channel opening B, and the second O-ring set is connected to the valve body below the flow channel opening B.

2. A hydraulic dual-state solenoid valve for an automobile brake system according to claim 1, characterized in that: The fixed connection mode of the static iron core and the metal guide sleeve is laser welding.

3. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: The metal guide sleeve and the valve body are fixedly connected by laser welding.

4. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: The valve body includes a flow channel opening A, a flow channel opening B, a first flow channel and a curved surface, wherein the first flow channel is connected to the flow channel opening A and the flow channel opening B, and the curved surface is located on the inner wall between the flow channel opening A and the flow channel opening B. The curved surface cooperates with the smooth sealing arc surface of the valve core to seal, and after sealing, it is used to close the valve opening E and block the first flow channel.

5. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: The valve core includes a guide section, a spring support seat, a smooth sealing arc surface, an opening, a guide body, and a sealing cone surface, wherein the guide section is slidably connected to the valve body and plays a guiding role during movement. The shoulder at the upper end of the guide section is hot-melt connected to the moving iron core after positioning. A reset spring is placed on the spring support seat. A circle of smooth sealing arc surfaces cooperates with the arc surface of the inner wall of the valve body to form a valve port E and realize a sealing function. The openings are evenly arranged at 120 degrees around the axis of the valve core. When the valve port E is open, it is a space for liquid flow and does not hinder the liquid. The guide body is naturally formed after the opening processing is completed and plays a guiding role. The sealing cone surface cooperates with the valve seat to form a valve port F and realize a sealing function.

6. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: The valve seat has a second flow channel inside, a flow channel opening C at the bottom, and a valve opening F formed by cooperation between the top valve seat opening and the sealing cone surface of the valve core.

7. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: The axial clearance between the moving iron core and the valve body in the static state should be greater than 0 to ensure that the valve core can be tightly pressed against the valve seat under the action of the return spring to close the valve port F.

8. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: After the moving iron core and the static iron core are energized and attracted, the axial clearance in the static state is greater than 0, ensuring that the valve core can be tightly pressed against the valve body under the action of suction to close the valve port E.

9. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: When no electricity is supplied, the valve core is tightly pressed against the valve seat under the action of the thrust of the return spring, keeping the valve port F closed and the valve port E open, so that the flow ports A and B are unblocked, that is, the first flow channel is connected, and the flow ports B and C are blocked, that is, the second flow channel is cut off; When the power is turned on, the static iron core is magnetized by the electromagnetic coil, generating a magnetic field force that causes the moving iron core to drive the valve core to overcome the thrust of the return spring and move upward, closing the valve port E. At the same time, the valve port F is opened, the flow channel ports A and B are blocked, and the flow channel ports B and C are connected, and the second flow channel remains unblocked; When the electromagnetic coil is powered off, the return spring pushes the valve core back to the initial position, the valve port E opens again, the valve port F closes, the second flow channel is cut off, and the first flow channel returns to the unblocked state.

10. The hydraulic dual-state solenoid valve for automobile brake system according to claim 1, characterized in that: The O-type sealing ring 1 and the O-type sealing ring 2 are sleeved on the valve body to separate the flow channel opening A, the flow channel opening B and the flow channel opening C, and isolate the two chambers to form two sealed independent working chambers.

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