Linear pressurizing electromagnetic valve for automobile braking system

Abstract

The utility model discloses a linear pressurizing solenoid valve for an automobile braking system, which comprises a shell seat, a shell is welded on the outer wall of the top of the shell seat, a cavity is arranged on the outer wall of the top of the shell seat, a movable valve core is arranged in the shell, a push rod is fixed at the center of the bottom of the movable valve core, the push rod is inserted into the inner wall of the cavity, and the movable valve core is arranged in the cavity. A liquid inlet is formed in the center of the bottom of the cavity in a penetrating mode, and a cylindrical inserting groove is formed in the outer wall of the bottom of the shell base. According to the utility model, the spring is additionally arranged in the shell seat for supporting, so that the spring is arranged on the shell seat, the push rod and the spring are in linear opening in the back-and-forth movement process, the stability is higher, and the insertion depth of the push rod can be controlled by changing the current intensity of the external coil and utilizing the elastic potential energy of the spring for matching; therefore, the flow of liquid in the liquid inlet channel can be changed, the function that the inlet and outlet pressure difference can be adjusted is achieved, the structure is simple, reliability is high, and consistency is high.

Description

A linear boost solenoid valve for automotive braking systems Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a linear booster solenoid valve for use in automotive braking systems. Background Technology

[0002] Braking systems typically use linear booster solenoid valves, which are controlled by energizing a coil to open and close the valve. These booster valves are normally open, allowing brake fluid to flow even when the coil is de-energized. Linear solenoid valves, on the other hand, control the pressure difference at the valve orifice by controlling the current to the coil. Traditional solenoid valves are on / off solenoid valves; their simple structure cannot effectively control the pressure difference between the valve orifice, only allowing for the opening and closing of the valve, thus presenting certain limitations. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a linear booster solenoid valve for automotive braking systems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A linear boost solenoid valve for automotive braking systems includes a housing, a shell welded to the top outer wall of the housing, and a cavity formed in the top outer wall of the housing. A moving valve core is installed inside the shell, and a push rod is fixed at the bottom center of the moving valve core. The push rod is inserted into the inner wall of the cavity, and a liquid inlet is formed through the bottom center of the cavity. A cylindrical slot is formed in the bottom outer wall of the housing, and a valve seat is inserted into the inner wall of the cylindrical slot. An annular filter seat is assembled at the bottom of the housing, and an embedding groove is provided on one side of the bottom of the annular filter seat. A steel ball is embedded in the inner wall of the embedding groove, and a liquid inlet passage is provided at one end of the embedding groove.

[0006] As a further improvement of this utility model: a spring is sleeved on the outer wall of the push rod, and the outer wall size of the spring is adapted to the inner wall size of the cavity.

[0007] As a further improvement of this utility model: the bottom of the annular filter holder is provided with a slot, and the inner wall of the slot is fixedly fitted with an oil inlet filter.

[0008] As a further embodiment of this utility model: a central column is provided at the center of the annular filter screen seat, and the central column forms an interference fit with the inner hole at the bottom of the valve seat.

[0009] As a further improvement of this utility model: a protective cover is provided on the outer walls of the outer shell, and several coils are wound inside the protective cover, with one end of the coils connected to a power line.

[0010] As a further improvement of this utility model: the bottom outer wall size of the push rod is adapted to the inner wall size of the liquid inlet, and the push rod and the liquid inlet form a plug-in fit.

[0011] As a further improvement of this utility model: the liquid flow direction inside the liquid inlet passage is from the oil inlet filter screen to the inside, and the steel ball and the annular filter screen seat form a one-way valve.

[0012] Compared with the prior art, this utility model provides a linear booster solenoid valve for automotive braking systems, which has the following advantages:

[0013] The linear booster solenoid valve designed in this way uses a spring support inside the housing, with the spring mounted on the housing. The linear opening during the reciprocating motion of the push rod and the spring provides greater stability. Furthermore, by changing the current strength of the external coil and utilizing the elastic potential energy of the spring, the insertion depth of the push rod can be controlled, thereby changing the liquid flow rate inside the inlet passage. This achieves the function of adjustable inlet and outlet pressure difference. Moreover, it has a simple structure, high reliability, and strong consistency.

[0014] The linear booster solenoid valve in this design achieves better sealing by assembling an annular filter seat at the bottom of the housing, ensuring that the product performance better meets the requirements of automotive braking control and reducing manufacturing costs.

[0015] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0016] Figure 1 is a cross-sectional view of the overall structure of a linear booster solenoid valve for an automotive braking system proposed in this utility model.

[0017] Figure 2 is an enlarged structural diagram of the first part of a linear booster solenoid valve for automotive braking systems proposed in this utility model.

[0018] Figure 3 is an enlarged structural diagram of the second part of a linear booster solenoid valve for automotive braking systems proposed in this utility model.

[0019] Figure 4 is a partial structural cross-sectional view of a linear booster solenoid valve for automotive braking systems proposed in this utility model.

[0020] In the diagram: 1. Housing; 2. Outer shell; 3. Cavity; 4. Moving valve core; 5. Push rod; 6. Spring; 7. Liquid inlet; 8. Cylindrical slot; 9. Valve seat; 10. Annular filter screen holder; 11. Insert groove; 12. Steel ball; 13. Liquid inlet passage; 14. Slot; 15. Oil inlet filter screen; 16. Protective cover; 17. Coil; 18. Power cord; 19. Center column. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Embodiment 1:

[0022] A linear booster solenoid valve for automotive braking systems, as shown in Figures 1-4, includes a housing 1. A shell 2 is welded to the top outer wall of the housing 1, and a cavity 3 is formed in the top outer wall of the housing 1. A moving valve core 4 is installed inside the shell 2, and a push rod 5 is fixed at the bottom center of the moving valve core 4. The push rod 5 is inserted into the inner wall of the cavity 3, and a liquid inlet 7 is formed through the bottom center of the cavity 3. A cylindrical slot 8 is formed on the bottom outer wall of the housing 1, and a valve seat 9 is inserted into the inner wall of the cylindrical slot 8. An annular filter seat 10 is assembled at the bottom of the housing 1, and an embedding groove 11 is provided on one side of the bottom of the annular filter seat 10. A steel ball 12 is embedded in the inner wall of the embedding groove 11, and a liquid inlet passage 13 is provided at one end of the embedding groove 11.

[0023] By adding a spring 6 inside the housing 1 for support, and mounting the spring 6 on the housing 1, the linear opening of the push rod 5 and spring 6 during their reciprocating motion is made more stable. Furthermore, by changing the current strength of the external coil and utilizing the elastic potential energy of the spring 6, the insertion depth of the push rod 5 can be controlled, thereby changing the liquid flow rate inside the liquid inlet passage 13. This achieves the function of adjustable inlet and outlet pressure difference. Moreover, the structure is simple, highly reliable, and has strong consistency.

[0024] The outer wall of the push rod 5 is fitted with a spring 6, and the outer wall size of the spring 6 is adapted to the inner wall size of the cavity 3. The bottom of the annular filter seat 10 is provided with a slot 14, and the inner wall of the slot 14 is fixedly fitted with an oil inlet filter 15.

[0025] The annular filter seat 10 has a central column 19 at its center, and the central column 19 forms an interference fit with the bottom inner hole of the valve seat 9.

[0026] The outer walls of the outer casing 2 are provided with a protective cover 16, and a number of coils 17 are wound inside the protective cover 16, with one end of the coils 17 connected to a power line 18.

[0027] By assembling an annular filter seat 10 at the bottom of the housing 1, better sealing can be achieved, ensuring that the product performance better meets the requirements of automotive braking control and reducing manufacturing costs.

[0028] In this embodiment, the linear booster solenoid valve is first assembled. After assembly, the power line 18 on one side of the coil 17 is connected to an external power source for conductivity. To start the solenoid valve, simply turn on the power. The coil 17 generates a magnetic field, causing the valve core 4 to move downwards, thus lowering the bottom push rod 5 and inserting it into the inlet 7. Because the bottom of the push rod 5 is fitted with a spring 6, the elastic potential energy of the spring 6 allows for a more stable linear opening during the movement. Furthermore, by controlling the magnitude of the external current supply, combined with the elastic potential energy of the spring 6, the insertion depth of the push rod 5 can be adjusted to achieve controllable adjustment of the inlet and outlet pressure difference. Additionally, the steel ball 12 at the bottom, utilizing its own gravitational potential energy, allows the liquid to flow in one direction. If backflow occurs, the channel can be blocked to prevent backflow. Example 2:

[0029] A linear booster solenoid valve for automotive braking systems, as shown in Figures 1-4, is provided in this embodiment based on embodiment 1 with the following additions: the bottom outer wall size of the push rod 5 is adapted to the inner wall size of the liquid inlet 7, and the push rod 5 and the liquid inlet 7 form a plug-in fit; the liquid flow direction inside the liquid inlet passage 13 is from the oil filter screen 15 to the inside, and the steel ball 12 and the annular filter screen seat 10 constitute a one-way valve.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A linear booster solenoid valve for automotive braking systems, comprising a housing (1), characterized in that, The outer wall of the housing (1) is welded with a shell (2), and the outer wall of the housing (1) has a cavity (3). The inner wall of the shell (2) is equipped with a moving valve core (4), and a push rod (5) is fixed at the bottom center of the moving valve core (4). The push rod (5) is inserted into the inner wall of the cavity (3), and a liquid inlet (7) is opened through the bottom center of the cavity (3). The outer wall of the bottom of the housing (1) is provided with a cylindrical slot (8), and a valve seat (9) is inserted into the inner wall of the cylindrical slot (8). The bottom of the housing (1) is equipped with an annular filter seat (10), and an insert groove (11) is provided on one side of the bottom of the annular filter seat (10). A steel ball (12) is embedded in the inner wall of the insert groove (11), and a liquid inlet passage (13) is provided at one end of the insert groove (11).

2. The linear booster solenoid valve for use in an automotive brake system according to claim 1, wherein The outer wall of the push rod (5) is fitted with a spring (6), and the outer wall size of the spring (6) is adapted to the inner wall size of the cavity (3).

3. A linear booster solenoid valve for an automotive braking system according to claim 1, characterized in that, The bottom of the annular filter holder (10) is provided with a slot (14), and the inner wall of the slot (14) is fixedly fitted with an oil inlet filter (15).

4. The linear booster solenoid valve for use in an automotive brake system according to claim 1, wherein The annular filter seat (10) has a central column (19) at its center, and the central column (19) and the bottom inner hole of the valve seat (9) form an interference fit.

5. The linear booster solenoid valve for use in an automotive brake system according to claim 1, wherein The outer walls of the outer shell (2) are provided with a protective cover (16), and a number of coils (17) are wound inside the protective cover (16), one end of the coils (17) is connected to a power line (18).

6. The linear booster solenoid valve for use in an automotive brake system according to claim 1, wherein The bottom outer wall dimension of the push rod (5) is adapted to the inner wall dimension of the liquid inlet (7), and the push rod (5) and the liquid inlet (7) form a plug-in fit.

7. A linear booster solenoid valve for an automotive braking system according to claim 3, characterized in that, The liquid flow direction inside the liquid inlet passage (13) is from the oil inlet filter (15) to the inside, and the steel ball (12) and the annular filter seat (10) form a one-way valve.

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