A carbon can solenoid valve

Abstract

The utility model discloses a kind of carbon tank solenoid valves, belong to solenoid valve technical field, including shell, end cap, coil assembly and valve core subassembly, end cap is set to one end of shell, the inside of shell has installation cavity and first passage, second passage is equipped on end cap, coil assembly includes winding skeleton, electromagnetic induction coil, static iron core and moving iron core, winding skeleton is set in installation cavity, electromagnetic induction coil is wound on winding skeleton, the middle of winding skeleton is hollow passage, static iron core and moving iron core are all set in hollow passage, valve core subassembly includes valve seat, valve and return spring, valve seat is set to the inboard of end cap and with second passage corresponding, valve is set to the one end of moving iron core close to end cap, the one end of moving iron core away from valve is equipped with counterbore, return spring is set in counterbore, one end of return spring and static iron core abut. Its simple structure, dismounting is convenient, good sealing, high reliability.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically relating to a carbon canister electromagnetic valve. Background Technology

[0002] The carbon canister solenoid valve is a key component in automotive fuel evaporative emission control systems, primarily used to control the passage of fuel vapor from the carbon canister into the engine intake manifold. Its reliability and response characteristics directly affect the vehicle's fuel economy and emissions levels.

[0003] However, the winding skeleton in the carbon canister solenoid valve of the prior art has poor plasticity during injection molding, which affects the long-term reliability of the solenoid valve. At the same time, the valve is mostly installed in a fixed manner or with a complex structure, which is not convenient for assembly and maintenance, increasing manufacturing costs and the difficulty of after-sales maintenance. In addition, the preload adjustment of the return spring usually relies on external shims or complex adjustment mechanisms, which is not only cumbersome to adjust, but also difficult to achieve precise control, affecting the consistency and stability of the valve response. Utility Model Content

[0004] The purpose of this utility model is to provide a carbon canister solenoid valve, which has a simple structure, is easy to use, and can effectively improve the above-mentioned problems.

[0005] The embodiments of this utility model are implemented as follows:

[0006] This utility model provides a carbon canister solenoid valve, including a housing, an end cap, a coil assembly, and a valve core assembly. The end cap is disposed at one end of the housing and forms a buffer cavity. The housing has a spaced-apart mounting cavity and a first channel. The end cap has a second channel. Both the first and second channels communicate with the buffer cavity. The coil assembly includes a winding frame, an electromagnetic induction coil, a stationary iron core, and a moving iron core. The winding frame is disposed within the mounting cavity. The electromagnetic induction coil is wound around the outer circumferential surface of the winding frame. The middle of the winding frame... The structure is a hollow channel. The stationary iron core is fixedly disposed within the hollow channel, and the moving iron core is slidably disposed within the hollow channel and located between the stationary iron core and the end cap. The valve core assembly includes a valve seat, a valve, and a return spring. The valve seat is disposed inside the end cap and corresponds to the second channel. The valve is disposed at the end of the moving iron core near the end cap and corresponds to the valve seat. A countersunk hole is provided at the end of the moving iron core away from the valve, and the return spring is disposed within the countersunk hole. The end of the return spring away from the valve abuts against the stationary iron core.

[0007] Furthermore, the stationary iron core has a through hole at its center, and the end of the housing away from the end cap has an adjustment hole at a position corresponding to the through hole. A push rod is provided at the adjustment hole. The push rod has a T-shaped structure, and the rod-shaped part of the push rod passes through the through hole of the stationary iron core and abuts against the return spring.

[0008] Furthermore, the end cap of the push rod is threaded into the adjusting hole.

[0009] Furthermore, the outer surfaces of the end plates of the winding skeleton are provided with multiple rings of protrusions.

[0010] Furthermore, the multiple raised rings are concentric and spaced apart in the radial direction.

[0011] Furthermore, the moving iron core has a locking hole at one end near the end cover, and the valve has a locking part that engages with the locking hole.

[0012] Furthermore, a guide sleeve is provided on the outer side of the moving iron core, the moving iron core and the guide sleeve are slidably engaged, the guide sleeve is located in the hollow channel and is fixedly connected to the housing.

[0013] Furthermore, a front yoke is provided at the end of the winding skeleton near the end cap, and a rear yoke is provided at the end of the winding skeleton away from the end cap.

[0014] Furthermore, a coil electrode interface is provided at the end of the housing away from the end cap, and the coil electrode interface is electrically connected to the electromagnetic induction coil.

[0015] The beneficial effects of this utility model are as follows:

[0016] The carbon canister solenoid valve provided in this embodiment of the invention has a simple structure, is easy to use, has good reliability, is easy to disassemble and assemble, and is convenient for installation and maintenance. The spring force of the return spring can be adjusted by the push rod, which greatly improves the convenience of adjustment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the carbon canister solenoid valve provided for an embodiment of this utility model;

[0019] Figure 2A front view of the carbon canister solenoid valve provided for an embodiment of this utility model;

[0020] Figure 3 for Figure 2 AA section view;

[0021] Figure 4 This is a schematic diagram of the winding skeleton.

[0022] In the diagram: 1-Housing; 11-First channel; 12-Buffer cavity; 13-Coil electrode interface; 2-End cap; 21-Second channel; 3-Coil assembly; 31-Winding frame; 311-Protrusion; 32-Electromagnetic induction coil; 33-Stationary iron core; 34-Moving iron core; 35-Guide sleeve; 36-Front yoke; 37-Rear yoke; 4-Valve core assembly; 41-Valve seat; 42-Valve; 43-Reset spring; 44-Push rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] refer to Figure 1-3 As shown, this utility model provides a carbon canister solenoid valve, including a housing 1, an end cap 2, a coil assembly 3, and a valve core assembly 4.

[0029] The housing 1 has an internal mounting cavity and a first channel 11 that are separated from each other. The end cap 2 is provided with a second channel 21. The end cap 2 is located at one end of the housing 1 and forms a buffer cavity 12. The first channel 11 and the second channel 21 are both connected to the buffer cavity 12.

[0030] The coil assembly 3 includes a winding frame 31, an electromagnetic induction coil 32, a stationary iron core 33, and a moving iron core 34. The winding frame 31 has an I-shaped structure, and multiple protrusions 311 are provided on the outer surfaces of the end plates of the winding frame 31 (see reference). Figure 4 The multiple raised portions 311 are concentric and distributed radially. The arrangement of the raised portions 311 ensures that the winding skeleton 31 has increased plastic coating reliability under the same injection pressure. The middle of the winding skeleton 31 is a hollow channel that passes through both ends. The winding skeleton 31 is set in the mounting cavity. The axial direction of the hollow channel is the same as the axial direction of the housing 1. The electromagnetic induction coil 32 is wound on the outer circumferential surface of the winding skeleton 31. The stationary iron core 33 is fixedly set in the hollow channel. The moving iron core 34 is slidably set in the hollow channel and is located between the stationary iron core 33 and the end cover 2. The outer side of the moving iron core 34 is fitted with a guide sleeve 35. The moving iron core 34 and the guide sleeve 35 are slidably engaged. The guide sleeve 35 is also located in the hollow channel and is fixedly connected to the housing 1.

[0031] The valve core assembly 4 includes a valve seat 41, a valve 42, and a return spring 43. The valve seat 41 is located inside the end cover 2 and corresponds to the second channel 21. The valve 42 is located at one end of the moving iron core 34 near the end cover 2. The end of the moving iron core 34 near the end cover 2 has a locking hole. The valve 42 has a locking part that engages with the locking hole, facilitating the disassembly and assembly of the valve 42. The valve 42 corresponds to the valve seat 41. The end of the moving iron core 34 away from the valve 42 has a countersunk hole, and the return spring 43 is located in the countersunk hole. The center of the stationary iron core 33 has a through hole that passes through both ends. The end of the housing 1 away from the end cover 2 has an adjustment hole at a position corresponding to the through hole. A push rod 44 is located at the adjustment hole. The push rod 44 has a T-shaped structure. The rod-shaped part of the push rod 44 passes through the through hole of the stationary iron core 33 and abuts against the return spring 43. The end cap of the push rod 44 is threaded into the adjustment hole, facilitating the adjustment of the spring force of the return spring 43.

[0032] The winding frame 31 has a front yoke 36 at one end near the end cap 2 and a rear yoke 37 at the other end away from the end cap 2. The front yoke 36 and the rear yoke 37 are used to enclose the magnetic lines of force generated by the electromagnetic induction coil 32 inside, thereby improving the efficiency of the electromagnet.

[0033] The end of the housing 1 furthest from the end cap 2 is also provided with a coil electrode interface 13, which is electrically connected to the electromagnetic induction coil 32.

[0034] The working principle of the carbon canister solenoid valve provided in this embodiment of the invention is as follows:

[0035] When the electromagnetic induction coil 32 is not energized, the valve 42, under the action of the return spring 43, is in contact with the valve seat 41, thereby blocking the second channel 21, and the solenoid valve is in the closed state. When the electromagnetic induction coil 32 is energized, it generates magnetic force, and the moving iron core 34 drives the valve 42 to move towards the stationary iron core 33 against the elastic force of the return spring 43, thereby separating the valve 42 from the valve seat 41, opening the second channel 21. Both the first channel 11 and the second channel 21 are connected to the buffer cavity 12, and the solenoid valve is in the open state, allowing fluid to flow through the first channel 11 and the second channel 21.

[0036] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A carbon canister solenoid valve, characterized in that: The device includes a housing, an end cap, a coil assembly, and a valve core assembly. The end cap is located at one end of the housing and forms a buffer cavity. The housing has a spaced-apart mounting cavity and a first channel. The end cap has a second channel. Both the first and second channels communicate with the buffer cavity. The coil assembly includes a winding frame, an electromagnetic induction coil, a stationary iron core, and a moving iron core. The winding frame is located within the mounting cavity. The electromagnetic induction coil is wound around the outer circumference of the winding frame. The winding frame has a hollow channel in the middle. The stationary iron core... The core is fixedly disposed within the hollow channel, and the moving iron core is slidably disposed within the hollow channel and located between the stationary iron core and the end cap. The valve core assembly includes a valve seat, a valve, and a return spring. The valve seat is disposed on the inner side of the end cap and corresponds to the second channel. The valve is disposed at one end of the moving iron core near the end cap and corresponds to the valve seat. A countersunk hole is provided at one end of the moving iron core away from the valve, and the return spring is disposed within the countersunk hole. The end of the return spring away from the valve abuts against the stationary iron core.

2. The carbon canister solenoid valve according to claim 1, characterized in that: The stationary iron core has a through hole at its center, and the end of the housing away from the end cap has an adjustment hole at a position corresponding to the through hole. A push rod is provided at the adjustment hole. The push rod has a T-shaped structure. The rod-shaped part of the push rod passes through the through hole of the stationary iron core and abuts against the return spring.

3. The carbon canister solenoid valve according to claim 2, characterized in that: The end cap of the push rod is threaded into the adjusting hole.

4. The carbon canister solenoid valve according to claim 1, characterized in that: The outer surfaces of the end plates of the winding frame are provided with multiple rings of protrusions.

5. The carbon canister solenoid valve according to claim 4, characterized in that: The multiple raised rings are concentric and spaced apart in the radial direction.

6. The carbon canister solenoid valve according to claim 1, characterized in that: The moving iron core has a locking hole at one end near the end cover, and the valve has a locking part that engages with the locking hole.

7. The carbon canister solenoid valve according to claim 1, characterized in that: A guide sleeve is fitted on the outer side of the moving iron core, and the moving iron core slides in conjunction with the guide sleeve. The guide sleeve is located inside the hollow channel and is fixedly connected to the housing.

8. The carbon canister solenoid valve according to claim 1, characterized in that: The winding skeleton has a front yoke at one end near the end cap and a rear yoke at the other end away from the end cap.

9. The carbon canister solenoid valve according to claim 1, characterized in that: The end of the housing away from the end cap is also provided with a coil electrode interface, which is electrically connected to the electromagnetic induction coil.

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