Linear control normally open solenoid valve

Abstract

The utility model relates to the technical field of automobile parts, especially to a linear control normally open electromagnetic valve, including valve casing and fixed iron, the one end of valve casing's axial has the open mouth, fixed iron fixedly arranged at the open mouth department of valve casing, the end of valve casing and the outer wall riveting of fixed iron, the outer wall of valve casing is coiled with the coil, the bottom of fixed iron is equipped with check valve, the lateral wall of fixed iron is equipped with oil port, the inside of valve casing is equipped with the moving body that moves in the direction of fixed iron under the electromagnetic action of coil, the inside of fixed iron is equipped with reset mechanism for driving the moving body to move to the other end of moving body. The utility model has the advantages of: the valve casing and fixed iron in the utility model are fixed through riveting, avoid using laser welding, reduce the requirement of production line, the assembly process is simple, the development cycle is short, and the research and development cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a linear control normally open solenoid valve. Background Technology

[0002] In vehicle braking systems, especially anti-lock braking systems (ABS), precise and linear control of the brake caliper hydraulic pressure is required to achieve safe, stable, and adjustable braking performance. Normally open linear control solenoid valves, as key actuators for this function, directly impact the performance and quality of the entire braking system due to their performance, reliability, manufacturing cost, and noise level. However, existing linear control solenoid valves suffer from several design and manufacturing defects that urgently require improvement: Complex manufacturing processes and high costs: Existing assembly processes often rely on technologies such as laser welding, which places stringent requirements on production line equipment and process precision. At the same time, key components such as magnetic shielding tubes usually require complex mold stretching and forming processes, resulting in high upfront development costs and long development cycles. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a linear control normally open solenoid valve with a simple assembly process for the valve body and the fixed iron, and convenient installation.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A linear control normally open solenoid valve includes a valve body and a fixed iron. One end of the valve body has an opening in the axial direction. The fixed iron is fixedly disposed at the opening of the valve body. The end of the valve body is riveted to the outer wall of the fixed iron. A coil is wound on the outer wall of the valve body. A one-way valve is provided at the bottom end of the fixed iron. An oil port communicating with the one-way valve is provided on the side wall of the fixed iron. A moving body is provided inside the valve body under the electromagnetic action of the coil and moves towards the fixed iron. One end of the moving body slides into the fixed iron along the axial direction of the valve body and closes or opens one end of the one-way valve under the electromagnetic action of the coil. A reset mechanism is provided inside the fixed iron for driving the moving body to move towards the other end of the moving body.

[0005] The beneficial effects of this utility model are: in this utility model, the valve body and the fixed iron are fixed by riveting, avoiding the use of laser welding, reducing the requirements of the production line, simplifying the assembly process, shortening the development cycle, and reducing the research and development cost.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the outer wall of the fixed iron is provided with a shoulder, the open end of the valve body is provided with a positioning groove, one end of the shoulder abuts the bottom of the positioning groove, and the end wall of the open end of the valve body bends inward to wrap around the peripheral wall of the other end of the shoulder.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the open end of the valve body wraps around the other end of the shoulder, and with the cooperation of the positioning groove, the two ends of the shoulder are limited and fixed, thereby fixing the fixed iron.

[0009] Furthermore, the moving body includes a moving iron and a push rod. The moving iron is fixedly sleeved on one end of the push rod. The moving iron is slidably disposed in the valve housing and inside the coil. The other end of the push rod is slidably disposed in the fixed iron. The reset mechanism is connected to the push rod.

[0010] The advantages of adopting the above-mentioned further solutions are: simple structure and convenient installation.

[0011] Furthermore, the fixed iron is provided with a channel passing through both ends of the fixed iron, the push rod is slidably disposed in the channel, the channel is provided with a first limiting step, the outer wall of the push rod is provided with a second limiting step, and the reset mechanism is disposed between the first limiting step and the second limiting step to apply a force to the push rod away from the one-way valve.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the first limiting step and the second limiting step facilitate the installation of the reset mechanism.

[0013] Furthermore, the reset mechanism includes a reset spring, which is sleeved on the push rod, with one end of the reset spring abutting against the first limiting step and the other end of the reset spring abutting against the second limiting step.

[0014] The advantages of adopting the above-mentioned further solutions are: simple structure and convenient installation.

[0015] Furthermore, one end of the push rod connected to the moving iron is provided with an annular mounting groove, and the moving iron is integrally injection molded and sleeved on the annular mounting groove.

[0016] The beneficial effect of adopting the above-mentioned further solution is that it realizes the integrated connection of the moving iron of the push rod, and avoids the noise generated by the impact between the moving iron and the push rod.

[0017] Furthermore, the side wall of the moving iron is provided with a first row of oil grooves extending to both ends of the moving iron.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the setting of the first oil groove can reduce the resistance during the movement of the moving iron.

[0019] Furthermore, the push rod has a plurality of second oil grooves extending along the axial direction of the push rod on its side wall.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the setting of the second oil groove can reduce the resistance during the movement of the push rod.

[0021] Furthermore, the fixed iron is provided with a conical valve port at one end connected to the one-way valve. The large end of the conical valve port faces the moving body and is connected to the oil port. The small end of the conical valve port is connected to one end of the valve port of the one-way valve. The moving body is provided with a sealing ball head at the end facing the one-way valve.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the setting of the conical valve port and the plugging ball head enables linear pressure control.

[0023] Furthermore, the one-way valve is a steel ball one-way valve.

[0024] The beneficial effects of adopting the above-mentioned further solutions are: to improve the service life of the one-way valve and to avoid problems such as aging, insufficient impact resistance and poor low-temperature sealing caused by long-term use when using conventional one-way sealing ring structures to achieve one-way communication. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the moving body in this utility model; Figure 3 This is a cross-sectional view of the push rod in this utility model where the second oil groove is located; The attached diagram lists the components represented by each number as follows: 1. Valve body; 2. Fixed iron; 3. Check valve; 4. Oil port; 5. Shoulder; 6. Positioning groove; 7. Moving iron; 8. Push rod; 9. Channel; 10. First limit step; 11. Second limit step; 12. Return spring; 13. Annular mounting groove; 14. First oil drain groove; 15. Second oil drain groove; 16. Conical valve port; 17. Sealing ball head; 18. Annular filter screen; 19. Annular groove; 20. Radial groove. Detailed Implementation

[0026] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] like Figure 1 , Figure 2 , Figure 3As shown, an embodiment of this utility model includes a valve housing 1 and a fixed iron 2. One axial end of the valve housing 1 has an opening, and the fixed iron 2 is fixedly disposed at the opening of the valve housing 1. The end of the valve housing 1 is riveted to the outer wall of the fixed iron 2. A coil is wound on the outer wall of the valve housing 1. Specifically, an annular groove 19 is provided on the outer wall of the valve housing 1, and the coil is wound in the annular groove 19. The annular groove 19 can be used to position the coil during winding.

[0028] The bottom end of the fixed iron 2 is provided with a one-way valve 3. The one-way valve 3 and the bottom end of the fixed iron 2 are radially sealed through an interference fit. The side wall of the fixed iron 2 is provided with an oil port 4 that communicates with the one-way valve 3. A ring filter screen 18 is fixedly sleeved on the outer wall of the fixed iron 2, and the ring filter screen 18 covers the oil port 4. The valve housing 1 is provided with a moving body that moves towards the fixed iron 2 under the electromagnetic action of the coil. One end of the moving body slides into the fixed iron 2 along the axial direction of the valve housing 1, and closes or opens one end of the valve port of the one-way valve 3 under the electromagnetic action of the coil. The fixed iron 2 is provided with a reset mechanism for driving the moving body to move to the other end of the moving body.

[0029] The outer wall of the fixed iron 2 is provided with a shoulder 5, and the open end of the valve body 1 is provided with a positioning groove 6. One end of the shoulder 5 abuts against the bottom of the positioning groove 6. The end wall of the open end of the valve body 1 bends inward to wrap around the peripheral wall of the other end of the shoulder 5. By wrapping the peripheral wall of the other end of the shoulder 5 with the positioning groove 6, the open end of the valve body 1 achieves the limitation and fixation of both ends of the shoulder 5, thereby achieving the fixation of the fixed iron 2.

[0030] The moving body includes a moving iron 7 and a push rod 8. The moving iron 7 is made of magnetic material, and the push rod 8 is made of PEEK material. The moving iron 7 is fixedly sleeved on one end of the push rod 8. The moving iron 7 is slidably disposed in the valve housing 1 and is disposed inside the coil. The other end of the push rod 8 is slidably disposed in the fixed iron 2. The reset mechanism is connected to the push rod 8. The structure is simple and easy to install.

[0031] The fixed iron 2 has a channel 9 that runs through both ends of the fixed iron 2. The push rod 8 is slidably disposed in the channel 9. The channel 9 has a first limiting step 10. The outer wall of the push rod 8 has a second limiting step 11. The reset mechanism is disposed between the first limiting step 10 and the second limiting step 11 to apply a force to the push rod 8 away from the one-way valve 3. The first limiting step 10 and the second limiting step 11 facilitate the installation of the reset mechanism.

[0032] The reset mechanism includes a reset spring 12, which is sleeved on the push rod 8. One end of the reset spring 12 abuts against the first limiting step 10, and the other end of the reset spring 12 abuts against the second limiting step 11. The structure is simple and easy to install.

[0033] The push rod 8 is provided with an annular mounting groove 13 at one end where it connects to the moving iron 7. The moving iron 7 is integrally injection molded and sleeved on the annular mounting groove 13, realizing the integrated connection of the moving iron 7 of the push rod 8 and avoiding noise caused by impact between the moving iron 7 and the push rod 8.

[0034] like Figure 2 As shown, the side wall of the moving iron 7 is provided with a first row of oil grooves 14 extending to both ends of the moving iron 7. The first row of oil grooves 14 can reduce the resistance during the movement of the moving iron 7.

[0035] like Figure 3 As shown, the push rod 8 has multiple second oil grooves 15 extending along the axial direction of the push rod 8 on its side wall. The second oil grooves 15 reduce the resistance during the movement of the push rod 8. The top of the push rod 8 has a radial groove 20 that extends through both sides of the top of the push rod 8. This prevents the top of the push rod 8 from forming a smooth, sealed contact with the inner wall of the valve housing 1 when the top of the push rod 8 abuts against the inner wall of the valve housing 1, thus preventing it from easily falling off.

[0036] The fixed iron 2 is connected to the one-way valve 3 at one end and is provided with a conical valve port 16. The large end of the conical valve port 16 faces the moving body and is connected to the oil port 4. The small end of the conical valve port 16 is connected to one end of the valve port of the one-way valve 3. The moving body is provided with a sealing ball head 17 at the end facing the one-way valve 3. The arrangement of the conical valve port 16 and the sealing ball head 17 enables linear pressure control.

[0037] The one-way valve 3 is a steel ball one-way valve, which improves the service life of the one-way valve 3 and avoids problems such as aging, insufficient impact resistance and poor low-temperature sealing caused by long-term use when using conventional one-way sealing ring structure to achieve one-way connection.

[0038] One end of the one-way valve 3 is connected to the other end of the valve, and one end of the one-way valve 3 is connected to the small end of the conical valve port 16. A one-way channel is provided on the side wall of the one-way valve 3, connecting to the other end of the valve port. A conical channel is provided within the one-way channel, and the steel ball is disposed within the conical channel. This allows oil to flow from the opening on the side wall of the one-way valve 3 into the other end of the valve port, while preventing oil from flowing from the other end of the valve port into the opening on the side wall of the one-way valve 3.

[0039] In this invention, the valve body 1 and the fixed iron 2 are fixed by riveting, avoiding the use of laser welding, reducing the requirements of the production line, simplifying the assembly process, shortening the development cycle, and reducing R&D costs.

[0040] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A linearly controlled normally open solenoid valve, characterized in that, The device includes a valve housing (1) and a fixed iron (2). One end of the valve housing (1) has an opening in the axial direction. The fixed iron (2) is fixedly installed at the opening of the valve housing (1). The end of the valve housing (1) is riveted to the outer wall of the fixed iron (2). A coil is wound on the outer wall of the valve housing (1). A one-way valve (3) is provided at the bottom of the fixed iron (2). An oil port (4) communicating with the one-way valve (3) is provided on the side wall of the fixed iron (2). A moving body is provided inside the valve housing (1) under the electromagnetic action of the coil and moves toward the fixed iron (2). One end of the moving body slides into the fixed iron (2) along the axial direction of the valve housing (1) and closes or opens one end of the valve port of the one-way valve (3) under the electromagnetic action of the coil. A reset mechanism is provided inside the fixed iron (2) for driving the moving body to move toward the other end of the moving body.

2. The linearly controlled normally open solenoid valve according to claim 1, characterized in that, The outer wall of the fixed iron (2) is provided with a shoulder (5), and the open end of the valve body (1) is provided with a positioning groove (6). One end of the shoulder (5) abuts against the bottom of the positioning groove (6), and the end wall of the open end of the valve body (1) bends inward to wrap the peripheral wall of the other end of the shoulder (5).

3. A linearly controlled normally open solenoid valve according to claim 1, characterized in that, The moving body includes a moving iron (7) and a push rod (8). The moving iron (7) is fixedly sleeved on one end of the push rod (8). The moving iron (7) is slidably disposed in the valve housing (1) and disposed inside the coil. The other end of the push rod (8) is slidably disposed in the fixed iron (2). The reset mechanism is connected to the push rod (8).

4. A linearly controlled normally open solenoid valve according to claim 3, characterized in that, The fixed iron (2) is provided with a channel (9) that runs through both ends of the fixed iron (2). The push rod (8) is slidably disposed in the channel (9). The channel (9) is provided with a first limiting step (10). The outer wall of the push rod (8) is provided with a second limiting step (11). The reset mechanism is disposed between the first limiting step (10) and the second limiting step (11) to apply a force to the push rod (8) away from the one-way valve (3).

5. A linearly controlled normally open solenoid valve according to claim 4, characterized in that, The reset mechanism includes a reset spring (12), which is sleeved on the push rod (8), with one end of the reset spring (12) abutting against the first limiting step (10) and the other end of the reset spring (12) abutting against the second limiting step (11).

6. A linearly controlled normally open solenoid valve according to claim 3, characterized in that, The push rod (8) is connected to the moving iron (7) at one end with an annular mounting groove (13), and the moving iron (7) is integrally injection molded and sleeved on the annular mounting groove (13).

7. A linearly controlled normally open solenoid valve according to claim 3, characterized in that, The side wall of the moving iron (7) is provided with a first row of oil grooves (14) extending to both ends of the moving iron (7).

8. A linearly controlled normally open solenoid valve according to claim 3, characterized in that, The push rod (8) has a plurality of second oil grooves (15) extending along the axial direction of the push rod (8) on its side wall.

9. A linearly controlled normally open solenoid valve according to any one of claims 1 to 8, characterized in that, The fixed iron (2) is connected to the one-way valve (3) at one end with a conical valve port (16). The large end of the conical valve port (16) faces the moving body and is connected to the oil port (4). The small end of the conical valve port (16) is connected to one end of the valve port of the one-way valve (3). The moving body is provided with a sealing ball head (17) at the end facing the one-way valve (3).

10. A linearly controlled normally open solenoid valve according to any one of claims 1 to 8, characterized in that, The one-way valve (3) is a steel ball one-way valve.

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