Electromagnetic control mechanism and electromagnetic valve

Abstract

The application provides an electromagnetic control mechanism and an electromagnetic valve. The electromagnetic control mechanism comprises a coil support, a sleeve and a static core. The static core is fixedly connected or positionally connected with the sleeve. The sleeve has a first end and a second end at two axial ends thereof. The static core penetrates the first end. A part of the static core is located inside the sleeve, and another part of the static core is located outside the sleeve. The coil support is provided with a connecting hole part. The connecting hole part is at least partially sleeved outside the static core and is in interference fit with the static core. The electromagnetic valve comprises a valve seat and the above-mentioned electromagnetic control mechanism. The valve seat is provided with a first valve port part and a second valve port part. The electromagnetic control mechanism can control the first valve port part to be opened or closed. The application avoids the problems that the coil support is difficult to assemble, the coil support is easily damaged during the assembly process, the coil support is easily displaced or even falls off after the assembly is completed, and the installation firmness of the coil support is ensured, so that the electromagnetic control mechanism has high reliability.

Description

Technical Field

[0001] This application relates to the field of electromagnetic control technology, and in particular to an electromagnetic control mechanism and a solenoid valve. Background Technology

[0002] The electromagnetic control mechanism includes a coil support for winding the coil, a stationary iron core for generating magnetic force, and a sleeve for fixing the stationary iron core. Currently, electromagnetic control mechanisms on the market use a sleeve riveted to the stationary iron core and an interference fit between the sleeve and the coil support. This results in problems such as difficulty in assembling the sleeve and coil support, easy damage to the coil support during assembly, and easy displacement or even detachment of the coil support from the sleeve after assembly. Utility Model Content

[0003] To solve the above-mentioned technical problems, this application provides an electromagnetic control mechanism, which includes at least a coil support, a sleeve, and a stationary iron core. The stationary iron core is fixedly connected or limited to the sleeve. The two axial ends of the sleeve are a first end and a second end, respectively. The stationary iron core is inserted through the first end. One part of the stationary iron core is located inside the sleeve, and another part of the stationary iron core is located outside the sleeve. The coil support is provided with a receiving hole. The receiving hole is at least partially fitted around the outside of the stationary iron core and has an interference fit with the stationary iron core.

[0004] This application also provides a solenoid valve, which includes a valve seat and the aforementioned electromagnetic control mechanism. The valve seat is provided with a first valve port and a second valve port. The electromagnetic control mechanism can control the first valve port to open or close. When the first valve port is open, the first valve port and the second valve port are connected. When the first valve port is closed, the first valve port and the second valve port are not connected.

[0005] The electromagnetic control mechanism provided in this application has a stationary iron core located outside the sleeve, and the coil support is at least partially fitted around this stationary iron core with an interference fit. In this way, the coil support does not need to be interference-fitted with the sleeve, thus avoiding the problems of difficult assembly, easy damage to the coil support during assembly, and easy displacement or even detachment of the coil support after assembly caused by the interference fit between the coil support and the sleeve. This ensures the installation firmness of the coil support and makes the electromagnetic control mechanism highly reliable.

[0006] The solenoid valve provided in this application can reliably control the valve switching using the aforementioned electromagnetic control mechanism. Attached Figure Description

[0007] Figure 1 A perspective view of one embodiment of the solenoid valve provided in this application;

[0008] Figure 2 for Figure 1A schematic diagram of the assembly process of the first assembly unit of the solenoid valve shown.

[0009] Figure 3 This is a cross-sectional view of the first assembly unit;

[0010] Figure 4 for Figure 1 A perspective view of the second assembly unit of the solenoid valve shown;

[0011] Figure 5 for Figure 4 A sectional view;

[0012] Figure 6 for Figure 4 Front view of the neutral iron core;

[0013] Figure 7 for Figure 1 A sectional view;

[0014] Figure 8 for Figure 7 A magnified view of the area inside the center circle;

[0015] Figure 9 This is a cross-sectional view of the coil support;

[0016] Figure 10 for Figure 9 EE sectional view.

[0017] The annotations in the attached figures are explained as follows:

[0018] 10. Coil support; 101. Connecting hole section; 101a. First connecting hole section; 101b. Second connecting hole section; A. Protruding ridge; B. Guide bevel; 20. Winding; 30. Conducting insert; 40. Housing; 50. Magnetic conductor; 60. Sleeve; 60a. First end; 60b. Second end; 60c. Annular connecting part; 70. Stationary iron core; 701. Interference fit section; 702. First guide section; 703. Second guide section; 704. Annular boss; 80. Core iron component; 801. Moving iron core; 801a. Guide fit section; 801b. Reduction section; 801c. Insertion section; 802. Seal; 802a. Limiting part; 90. Valve seat; 901. First valve port; 902. Second valve port; C. First assembly unit; D. Second assembly unit; 100. Elastic component. Detailed Implementation

[0019] This application provides an electromagnetic control mechanism and a solenoid valve. In order to enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1As shown, in this embodiment, the solenoid valve includes a first assembly unit C and a second assembly unit D. During assembly, the first assembly unit C can be assembled first, then the second assembly unit D can be assembled, and then the first assembly unit C and the second assembly unit D can be assembled together.

[0021] like Figure 2 and Figure 3 As shown, in this embodiment, the first assembly unit C includes a coil support 10, a winding 20, a conductive insert 30, a housing 40, and a magnetic conductor 50. The coil support 10 is provided with a connection hole 101. The assembly process of the first assembly unit C can be as follows: first, the coil support 10 is formed using insulating material, and the specific insulating support 10 can be injection molded; then, enameled wire is wound around the outside of the coil support 10 and shaped to form the winding 20, and positive and negative conductive inserts 30 are fixed on the coil support 10; then, the positive and negative leads of the winding 20 are welded to the positive and negative conductive inserts 30 respectively; then, the housing 40 is wrapped around the winding 20, the conductive insert 30, and the coil support 10; and then, the magnetic conductor 50 is fixed on the housing 40. In use, the conductive insert 30 is connected to an external circuit, and when energized, the winding 20 generates a magnetic field due to electromagnetic induction.

[0022] like Figure 4 and Figure 5As shown, in this embodiment, the second assembly unit D includes a sleeve 60, a stationary iron core 70, a core iron component 80, a valve seat 90, and an elastic element 100. The sleeve 60 has a first end 60a and a second end 60b at its two axial ends. The stationary iron core 70 is fixedly connected to the sleeve 60. The stationary iron core 70 and the sleeve 60 can be welded or riveted together. The stationary iron core 70 is inserted through the first end 60a of the sleeve 60. One section of the stationary iron core 70 is located inside the sleeve 60, and another section is located outside the sleeve 60. The core iron component 80 is located inside the sleeve 60, and is closer to the second end 60b of the sleeve 60 than the stationary iron core 70. The core iron component 80 can move axially within the sleeve 60 under the magnetic force of the stationary iron core 70. The core iron component 80 includes a moving iron core 801 and a sealing element 802. The moving iron core 801 and the sealing element 802 are fixedly connected or limitedly connected, enabling them to move axially synchronously. In the figure, the moving iron core 801 has an axial through hole, and the sealing element 802 is inserted into this hole. The sealing element 802 has limiting portions 802a at both ends, which abut against the end faces of the moving iron core 801, thus achieving a limited connection between the moving iron core 801 and the sealing element 802. The elastic element 100 is pre-compressed between the core iron component 80 and the stationary iron core 70. The valve seat 90 is assembled on the second end 60b of the sleeve 60. In the figure, the second end 60b of the sleeve 60 has an annular connecting portion 60c that protrudes radially outward. The valve seat 90 has an annular connecting groove on its inner side, and the annular connecting portion 60c is engaged in the annular connecting groove. The valve seat 90 has a first valve port 901 and a second valve port 902. The valve seat 90, sleeve 60, and core iron component 80 together form a valve cavity, and the first valve port 901 and the second valve port 902 can communicate with the valve cavity. When the stationary iron core 70 generates magnetic force, the core iron component 80 can overcome the elastic force of the elastic element 100 and move towards the stationary iron core 70 under the action of the magnetic force of the stationary iron core 70, so that the first valve port 901 opens. At this time, the solenoid valve is in the open state, and the first valve port 901 and the second valve port 902 are interconnected through the valve cavity. When the magnetic force of the stationary iron core 70 disappears, the core iron component 80 can move towards the first valve port 901 and reset under the action of the elastic force of the elastic element 100. When it moves to the limit position, the sealing element 802 seals the first valve port 901. At this time, the solenoid valve is in the closed state, and the first valve port 901 and the second valve port 902 are not connected.

[0023] like Figure 5 and Figure 6As shown, in this embodiment, the stationary iron core 70 includes an interference fit section 701, a first guide section 702, a second guide section 703, and an annular boss 704. The first guide section 702 and the second guide section 703 are located at the axial ends of the interference fit section 701. The outer diameter of the interference fit section 701 is not greater than the inner diameter of the sleeve 60, and part of the interference fit section 701 is located inside the sleeve 60 and part is located outside the sleeve 60. The outer diameters of the first guide section 702 and the second guide section 703 are both smaller than the outer diameter of the interference fit section 701. The first guide section 702 is located outside the sleeve 60. The second guide section 703 is located inside the sleeve 60. The second guide section 703 guides and engages with the sleeve 60, facilitating the assembly of the stationary iron core 70 and the sleeve 60. An annular boss 704 protrudes from one end of the second guide section 703 away from the interference fit section 701. The outer diameter of the annular boss 704 is smaller than the outer diameter of the second guide section 703, thereby forming a first limiting step surface between the outer surface of the annular boss 704 and the outer surface of the second guide section 703.

[0024] like Figure 5 As shown, in this embodiment, the moving iron core 801 includes a guide mating section 801a, a reduced diameter section 801b, and an insertion section 801c. The outer surface of the guide mating section 801a guides and mates with the inner surface of the sleeve 60, guiding the core iron component 80 to move axially along the sleeve 60. The reduced diameter section 801b is located at the end of the guide mating section 801a near the stationary iron core 70, and its outer diameter is smaller than that of the guide mating section 801a, thus forming a second limiting step surface between the outer surface of the reduced diameter section 801b and the outer surface of the guide mating section 801a. The elastic member 100 is sleeved on the outside of the annular boss 704 and the reduced diameter section 801b, with both ends of the elastic member 100 abutting against the first limiting step surface and the second limiting step surface, respectively. The insertion section 801c is located at one end of the reduced diameter section 801b near the stationary iron core 70. The outer diameter of the insertion section 801c is smaller than the outer diameter of the reduced diameter section 801b. The insertion section 801c is inserted into the annular boss 704.

[0025] like Figure 7 and Figure 8 As shown, the receiving hole portion 101 of the coil bracket 10 is at least partially sleeved on the outside of a section of stationary iron core 70 located outside the sleeve 60 and is interference-fitted with the outer surface of the section of stationary iron core 70, thereby fixing the first mounting unit C and the second mounting unit D.

[0026] When fixing the sleeve 60 and the stationary iron core 70, the sleeve 60 is relatively thin, which makes it easy for the sleeve 60 to deform to a certain extent. If the coil support 10 and the sleeve 60 are interference fit, problems such as difficulty in assembly, easy damage to the coil support 10 during the assembly process, and easy displacement or even detachment of the coil support 10 after assembly will occur.

[0027] In this application, a section of stationary iron core 70 is located outside the sleeve 60, and the coil bracket 10 is at least partially fitted outside the section of stationary iron core 70 and has an interference fit with the section of stationary iron core 70. In this way, the coil bracket 10 does not need to have an interference fit with the sleeve 60. Therefore, the problems of difficult assembly, easy damage to the coil bracket 10 during the assembly process, and easy displacement or even detachment of the coil bracket 10 after assembly are avoided, thus ensuring the installation firmness of the coil bracket 10.

[0028] like Figure 9 and Figure 10 As shown, in this embodiment, the inner surface of the receiving hole portion 101 is provided with multiple (two or more) protruding ridges A. Each protruding ridge A extends along the axial direction of the receiving hole portion 101, and the protruding ridges A are arranged sequentially at intervals in the circumferential direction of the receiving hole portion 101. The protruding ridges A are used for interference fit with the stationary iron core 70. In the figure, there are three protruding ridges A, which are arranged sequentially at 120-degree intervals. Of course, the number of protruding ridges A can also be three or more. In this embodiment, the receiving hole portion 101 includes a first receiving hole section 101a and a second receiving hole section 101b arranged sequentially along the axial direction. The protruding ridges A are arranged inside the first receiving hole section 101a, and the axial length of the protruding ridges A is shorter than the axial length of the receiving hole portion 101. One end of the protruding ridge A near the second connecting hole section 101b has an inlet ramp B. During assembly, a section of stationary iron core 70 located outside the sleeve 60 can be pressed into the spaces between the protruding ridges A along the inlet ramp B, thus achieving an interference fit with each protruding ridge A. During this process, the second guide section 703 first enters the spaces between the protruding ridges A and engages with each protruding ridge A to guide the pressing direction. The inner side of the second connecting hole section 101b does not have a protruding ridge A. The second connecting hole section 101b is used to insert the sleeve 60. There is a gap between the sleeve 60 and the second connecting hole section 101b to avoid affecting the pressing of the stationary iron core 70 and the protruding ridge A.

[0029] The electromagnetic control mechanism provided in this application includes at least the aforementioned coil support 10, sleeve 60, and stationary iron core 70, and may further include the aforementioned core iron component 80 and elastic element 100.

[0030] The electromagnetic control mechanism provided in this application can be applied to valve devices to electromagnetically control the opening or closing of the valve device, and can also be applied to other devices that require electromagnetic control.

[0031] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An electromagnetic control mechanism, characterized in that, The electromagnetic control mechanism includes at least a coil support (10), a sleeve (60), and a stationary iron core (70). The stationary iron core (70) is fixedly connected or limited to the sleeve (60). The two axial ends of the sleeve (60) are a first end (60a) and a second end (60b), respectively. The stationary iron core (70) is inserted through the first end (60a). One section of the stationary iron core (70) is located inside the sleeve (60), and another section of the stationary iron core (70) is located outside the sleeve (60). The coil support (10) is provided with a receiving hole (101). The receiving hole (101) is at least partially sleeved on the outside of the stationary iron core (70) and is interference-fitted with the stationary iron core (70).

2. The electromagnetic control mechanism according to claim 1, characterized in that, The inner side of the receiving hole (101) is provided with multiple protruding ridges (A). Each of the protruding ridges (A) is arranged sequentially at intervals in the circumferential direction of the receiving hole (101). The receiving hole (101) is interference-fitted with the stationary iron core (70) through each of the protruding ridges (A).

3. The electromagnetic control mechanism according to claim 2, characterized in that, The connecting hole portion (101) includes a first connecting hole section (101a) and a second connecting hole section (101b) arranged sequentially along the axial direction. The protruding ridge (A) is disposed inside the first connecting hole section (101a). The sleeve (60) is at least partially inserted into the second connecting hole section (101b) and is radially spaced from the inner surface of the second connecting hole section (101b).

4. The electromagnetic control mechanism according to claim 1, characterized in that, The stationary iron core (70) includes an interference fit section (701), the diameter of which is not greater than the inner diameter of the sleeve (60). The interference fit section (701) is partially located inside the sleeve (60) and partially located outside the sleeve (60). The connecting hole (101) is interference-fitted with the outer surface of the interference fit section (701).

5. The electromagnetic control mechanism according to claim 4, characterized in that, The stationary iron core (70) includes a first guide section (702), which is located at one axial end of the interference fit section (701). The diameter of the first guide section (702) is smaller than the diameter of the interference fit section (701), and the diameter of the first guide section (702) is smaller than the inner diameter of the sleeve (60). The first guide section (702) is located outside the sleeve (60).

6. The electromagnetic control mechanism according to claim 5, characterized in that, The stationary iron core (70) includes a second guide section (703), which is located at the other end of the axial direction of the interference fit section (701). The diameter of the second guide section (703) is smaller than the diameter of the interference fit section (701), and the second guide section (703) is located inside the sleeve (60).

7. The electromagnetic control mechanism according to claim 1, characterized in that, The sleeve (60) is welded or riveted to the stationary iron core (70).

8. The electromagnetic control mechanism according to any one of claims 1-7, characterized in that, The electromagnetic control mechanism includes a core iron component (80), which is located inside the sleeve (60) and can move axially under the magnetic force of the stationary iron core (70). An elastic element is pre-compressed between the core iron component (80) and the stationary iron core (70). The core iron component (80) is closer to the second end (60b) of the sleeve (60) than the stationary iron core (70). The core iron component (80) includes a moving iron core (801) and a sealing element (802), which are fixedly connected or limitedly connected.

9. A solenoid valve, characterized in that, The solenoid valve includes a valve seat (90) and an electromagnetic control mechanism as described in any one of claims 1-8. The valve seat (90) is provided with a first valve port (901) and a second valve port (902). The electromagnetic control mechanism can control the first valve port (901) to open or close. When the first valve port (901) is open, the first valve port (901) and the second valve port (902) are connected. When the first valve port (901) is closed, the first valve port (901) and the second valve port (902) are not connected.

10. The solenoid valve according to claim 9, characterized in that, The electromagnetic control mechanism includes a core iron component (80) located inside the sleeve (60) and capable of axial movement under the magnetic force of the stationary iron core (70). An elastic element (100) is pre-compressed between the core iron component (80) and the stationary iron core (70). The core iron component (80) is closer to the second end (60b) of the sleeve (60) than the stationary iron core (70). The core iron component (80) includes a moving iron core (801) and a sealing element. (802), the moving iron core (801) and the sealing element (802) are fixedly connected or limitedly connected; the sealing element (802) can open or close the first valve port (901), the valve seat (90) is assembled on the second end (60b) of the sleeve (60), the sleeve (60), the valve seat (90) and the core iron component (80) surround to form a valve cavity, and the first valve port (901) and the second valve port (902) can communicate with the valve cavity.

Images