Electromagnetic shielding structure of electric control pressure release valve

Abstract

The utility model relates to an electromagnetic shielding structure of an electric control pressure release valve. The electric control pressure release valve comprises a valve body and an electromagnet part, the electromagnetic shielding structure comprises a tightening cap, a first electromagnetic shielding part and a second electromagnetic shielding part, and the tightening cap is connected with the valve body and connects the electromagnet part to the valve body; the insulating sheath is arranged outside the electromagnet component in a sleeving manner; the cover cap is connected with the tightening cap, and the insulating sheath is surrounded by the cover cap; the wire harness is connected to the electromagnet component, and the wire harness comprises a metal wire shielding layer; wherein the cap is provided with a mounting part connected with the metal wire shielding layer. The metal wire shielding layer of the wire harness is connected with the fuel rail, the electric control pressure release valve and the wire harness and is grounded, so that an effective electromagnetic shielding effect is achieved. The electronic control pressure release valve is protected against electromagnetic interference, external electronic components are prevented from being interfered by the electronic control pressure release valve, and normal work of the whole system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an electromagnetic shielding structure of an electronically controlled pressure relief valve. Background Art

[0002] The electronically controlled pressure relief valve is mainly installed on the fuel rail or the high-pressure fuel pump, and the pressure in the fuel rail or the high-pressure fuel pump is adjusted through electrical signal control to ensure that it remains within a reasonable range.

[0003] However, when the existing electronically controlled pressure relief valve is installed, its terminal posts are directly exposed to the external environment without any protection measures. This exposed installation method is prone to electrical signal interference during use, thus affecting the normal operation of other external electronic components. In addition, the exposed wiring position is also prone to damage. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems that the exposed installation method of the terminal posts of the electronically controlled pressure relief valve in the prior art affects the normal operation of other external electronic components and is prone to damage.

[0005] To solve the above technical problem, the utility model provides an electromagnetic shielding structure of an electronically controlled pressure relief valve. The electronically controlled pressure relief valve includes a valve body and an electromagnet component. The electromagnetic shielding structure includes:

[0006] A tightening cap, which is connected to the valve body and connects the electromagnet component to the valve body;

[0007] An insulating sheath, which is sleeved outside the electromagnet component;

[0008] A cap, which is connected to the tightening cap and encloses the insulating sheath inside it;

[0009] A wire harness, which is connected to the electromagnet component. The wire harness includes a metal wire shielding layer; wherein, the cap is provided with an installation part connected to the metal wire shielding layer.

[0010] In an embodiment of the utility model, the inner peripheral wall of the tightening cap and the outer peripheral wall of the valve body are connected by threads.

[0011] In an embodiment of the utility model, the outer peripheral wall of the electromagnet component is provided with a first limiting step, and the inner peripheral wall of the tightening cap is provided with a second limiting step that abuts against the first limiting step.

[0012] In an embodiment of the utility model, the inner peripheral wall of the cap and the outer peripheral wall of the tightening cap are connected by threads.

[0013] In an embodiment of the present utility model, the cap is provided with a connection plate, the installation portion is configured as an annular boss protruding axially outward along the connection plate, and both axial ends of the insulating sheath abut against the connection plate and the axial end of the tightening cap respectively.

[0014] In an embodiment of the present utility model, the metal wire shielding layer is connected to the outer peripheral wall of the annular boss by welding.

[0015] In an embodiment of the present utility model, the metal wire shielding layer is provided with an expansion portion extending into the inner hole of the annular boss and abutting against the inner side wall of the connection plate.

[0016] In an embodiment of the present utility model, one end of the insulating sheath close to the connection plate is provided with a pressing plate for abutting the metal wire shielding layer against the expansion portion.

[0017] In an embodiment of the present utility model, one end of the insulating sheath close to the connection plate is provided with a pressing plate abutting against the expansion portion.

[0018] In an embodiment of the present utility model, the electromagnet component is provided with a terminal, and the wire harness is connected with a nut threadedly engaged with the terminal.

[0019] In an embodiment of the present utility model, the cap, the tightening cap and the valve body are all made of metal materials.

[0020] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0021] For the electromagnetic shielding structure of an electronically controlled pressure relief valve of the present utility model, the metal wire shielding layer of the wire harness is connected to and grounded with the fuel rail, the electronically controlled pressure relief valve and the wire harness, so as to achieve an effective electromagnetic shielding effect. It not only protects the electronically controlled pressure relief valve itself from electromagnetic interference, but also prevents it from interfering with external electronic components, ensuring the normal operation of the entire system.

[0022] The present utility model adopts a wire harness with a self - contained electromagnetic shielding function, and its interior is provided with a metal wire shielding layer. After the wire harness is installed through the nut, the metal wire shielding layer is connected to the cap outside the electronically controlled pressure relief valve, forming a complete electromagnetic shielding path, effectively reducing the interference of external electromagnetic signals on the electromagnet component.

[0023] The electronically controlled pressure relief valve of the present utility model includes a cap and an insulating sheath, which completely enclose the wiring position inside, thereby providing structural protection and avoiding the exposure of the wiring position to the external environment. This protection measure significantly reduces the risk of failure of the wiring position due to external physical damage or environmental factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model and in combination with the accompanying drawings.

[0025] Figure 1 It is a schematic diagram of the overall structure of the electromagnetic shielding structure of the electronic control pressure relief valve of the present utility model.

[0026] Figure 2 It is a schematic diagram of the structure of the electromagnetic shielding structure of the present utility model.

[0027] Figure 3 It is a schematic diagram of a wiring harness connection method of the present utility model.

[0028] Figure 4 It is a schematic diagram of another wiring harness connection method of the present utility model.

[0029] Description of the reference numerals in the drawings of the specification:

[0030] 1. High-pressure fuel supply pump;

[0031] 2. Electronic control pressure relief valve; 2-1. Cap; 2-2. Insulating sheath; 2-3. Tightening cap; 2-4. Electromagnet component; 2-5. Valve body; 2-6. Internal module of the valve body;

[0032] 3. Wiring harness;

[0033] 4. Metal wire shielding layer; 4-1. Expansion part;

[0034] 5. Nut;

[0035] 6-1. First limiting step; 6-2. Second limiting step;

[0036] 7. Connection plate; 7-1. Annular boss;

[0037] 8. Pressing plate. Specific embodiments

[0038] The following further illustrates the present utility model in combination with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0039] In the present utility model, when directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present utility model, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0040] In the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number; understandings such as "above", "below", "within", etc. include the corresponding number. In the description of the present utility model, if there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0041] In the present utility model, unless otherwise clearly defined, terms such as "arranged", "installed", "connected", etc. should be understood in a broad sense. For example, it can be directly connected, or indirectly connected through an intermediate medium; it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected, or electrically connected or capable of communicating with each other; it can be the communication inside two components or the interaction relationship between two components. Those skilled in the art to which the present utility model pertains can reasonably determine the specific meaning of the above terms in the present utility model in combination with the specific content of the technical solution.

[0042] Refer to Figure 1 、 Figure 2 As shown in

[0043] A tightening cap 2-3, the tightening cap 2-3 is connected to the valve body 2-5 and connects the electromagnet component 2-4 to the valve body 2-5;

[0044] An insulating sheath 2-2, the insulating sheath 2-2 is sleeved outside the electromagnet component 2-4;

[0045] A cap 2-1, the cap 2-1 is connected to the tightening cap 2-3 and encloses the insulating sheath 2-2 inside it;

[0046] A wire harness 3, the wire harness 3 is connected to the electromagnet component 2-4, the wire harness 3 includes a metal wire shielding layer 4; wherein, the cap 2-1 is provided with a mounting portion connected to the metal wire shielding layer 4.

[0047] It can be understood that a valve body internal module 2-6 (such as a valve core, a spring, etc.) cooperating with the electromagnet component 2-4 is also installed inside the valve body 2-5. The metal wire shielding layer 4 is made of a conductive material (usually a mesh-woven metal part), and is wrapped outside the cable or wire to shield the internal signal transmission line.

[0048] The metal wire shielding layer 4 of the wire harness 3 is connected to the fuel rail, the electronically controlled pressure relief valve 2, and the wire harness 3 and grounded, achieving an effective electromagnetic shielding effect. It not only protects the electronically controlled pressure relief valve 2 itself from electromagnetic interference but also prevents it from interfering with external electronic components, ensuring the normal operation of the entire system. It solves the problems of electromagnetic interference and damage caused by the exposed wiring of the existing structure and improves the overall reliability and durability of the product.

[0049] In addition, the insulating sheath 2-2 can prevent short circuits; the insulating cover can achieve electromagnetic shielding of the head of the electromagnet component 2-4 and play a protective role.

[0050] In one embodiment, the inner peripheral wall of the tightening cap 2-3 and the outer peripheral wall of the valve body 2-5 are connected by threads.

[0051] In one embodiment, a first limiting step 6-1 is provided on the outer peripheral wall of the electromagnet component 2-4, and a second limiting step 6-2 that abuts against the first limiting step 6-1 is provided on the inner peripheral wall of the tightening cap 2-3.

[0052] In one embodiment, the inner peripheral wall of the cap 2-1 and the outer peripheral wall of the tightening cap 2-3 are connected by threads. The cap 2-1 is connected to the tightening cap 2-3 and encloses the insulating sheath 2-2 inside, providing protection.

[0053] The design of the threaded connection enhances the connection strength between the tightening cap 2-3, the valve body 2-5, and the cap 2-1, facilitating disassembly and maintenance.

[0054] In one embodiment, referring to Figure 4 As shown, the cap 2-1 is provided with a connection disk 7, the mounting portion is configured as an annular boss 7-1 that protrudes axially outward along the connection disk 7, and the two axial ends of the insulating sheath 2-2 respectively abut against the connection disk 7 and the axial end of the tightening cap 2-3.

[0055] In one embodiment, referring to Figure 3 As shown, the metal wire shielding layer 4 is connected to the outer peripheral wall of the annular boss 7-1 by welding.

[0056] In one embodiment, referring to Figure 4 As shown, the metal wire shielding layer 4 is provided with an expansion portion 4-1 that extends into the inner hole of the annular boss 7-1 and abuts against the inner side wall of the connection disk 7. It can be understood that the expansion portion 4-1 is the structure presented by the enlarged state of the mesh part at the end of the metal wire shielding layer 4.

[0057] One end of the insulating sheath 2-2 close to the connecting disc 7 is provided with a pressing disc 8 that presses the metal wire shielding layer 4 against the expansion part 4-1. This effectively fixes the shielding layer, prevents it from shifting or loosening during use, and improves the electromagnetic shielding effect and structural stability.

[0058] Specifically, one end of the insulating sheath 2-2 close to the connecting disc 7 is provided with a pressing disc 8 that abuts against the expansion part 4-1.

[0059] In one embodiment, the electromagnet component 2-4 is provided with a terminal, and the wire harness 3 is connected with a nut 5 that is in threaded cooperation with the terminal. Specifically, a wire harness 3 with an electromagnetic shielding function is adopted, and it has a metal wire shielding layer 4 inside. When the wire harness 3 is installed through the nut 5, the metal wire shielding layer 4 is connected to the cap 2-1 outside the electronic control pressure relief valve 2.

[0060] In one embodiment, the cap 2-1, the tightening cap 2-3, and the valve body 2-5 are all made of metal materials.

[0061] Through the above settings, the electronic control pressure relief valve 2 is installed on the fuel rail or the high-pressure fuel pump 1. The wire harness 3 supplies power to the electromagnet component 2-4. Through the connection and grounding of the fuel rail, the electronic control pressure relief valve 2, and the metal wire shielding layer 4 of the wire harness 3, an effective electromagnetic shielding effect is achieved, and at the same time, the wiring position is protected, playing a protective role. By adopting the electromagnetic shielding structure, it protects the internal operation of the solenoid valve from external influences, and at the same time avoids the solenoid valve itself from generating signal interference to external components, ensuring the normal operation of the electromagnetic pressure relief valve.

[0062] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An electromagnetic shielding structure of an electrically controlled pressure relief valve, the electrically controlled pressure relief valve (2) comprising a valve body (2-5) and an electromagnet component (2-4), characterized in that: The electromagnetic shielding structure comprises: A tightening cap (2-3), the tightening cap (2-3) being connected to the valve body (2-5) and connecting the electromagnet component (2-4) to the valve body (2-5); An insulating sheath (2-2), the insulating sheath (2-2) being sleeved on the outside of the electromagnet component (2-4); A cover cap (2-1), the cover cap (2-1) being connected to the tight cap (2-3) and enclosing the insulating sheath (2-2) therein; A wiring harness (3), the wiring harness (3) being connected to the electromagnet component (2-4), the wiring harness (3) comprising a metal wire shielding layer (4); wherein the cap (2-1) is provided with a mounting portion connected to the metal wire shielding layer (4).

2. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 1, characterized in that: The inner peripheral wall of the tightening cap (2-3) and the outer peripheral wall of the valve body (2-5) are connected via threads.

3. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 2, characterized in that: The outer peripheral wall of the electromagnet component (2-4) is provided with a first limiting step (6-1), and the inner peripheral wall of the tightening cap (2-3) is provided with a second limiting step (6-2) abutting against the first limiting step (6-1).

4. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 1, characterized in that: The inner peripheral wall of the cover cap (2-1) and the outer peripheral wall of the tightening cap (2-3) are connected via threads.

5. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 1, characterized in that: The cover cap (2-1) is provided with a connecting disk (7), the mounting portion is constructed as an annular boss (7-1) protruding outwardly along the axial direction of the connecting disk (7), and the axial ends of the insulating sleeve (2-2) respectively abut against the axial ends of the connecting disk (7) and the tightening cap (2-3).

6. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 5, characterized in that: The metal wire shielding layer (4) is connected to the outer peripheral wall of the annular boss (7-1) by welding.

7. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 5, characterized in that: The metal wire shielding layer (4) is provided with an expansion portion (4-1) extending into the inner hole of the annular boss (7-1) and abutting against the inner side wall of the connection disk (7).

8. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 7, characterized in that: A compression disk (8) for abutting the metal wire shielding layer (4) against the expansion portion (4-1) is provided at one end of the insulating sheath (2-2) close to the connection disk (7).

9. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 1, characterized in that: The electromagnet component (2-4) is provided with a terminal, and the wiring harness (3) is connected with a nut (5) threadably matched with the terminal.

10. The electromagnetic shielding structure of an electrically controlled pressure relief valve according to claim 1, characterized in that: The cover cap (2-1), the tightening cap (2-3) and the valve body (2-5) are all made of metal material.

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