An electromagnetic actuator sealing structure

Abstract

The present invention provides a sealing structure for an electromagnetic actuator, which includes a valve sleeve (1) and a valve housing (3). A socket-type fixed connection structure is formed between the valve sleeve (1) and the valve housing (3). A relief groove (4) is provided on the valve sleeve (1). A sealant (2) is arranged at the socket part between the valve sleeve (1) and the valve housing (3). Part of the sealant in the sealant (2) is filled into the relief groove (4) in an extrusion manner. A sealing structure is jointly formed among the valve sleeve (1), the sealant (2), and the valve housing (3). The present invention can not only improve the connection strength between the valve sleeve and the valve housing, but also improve the airtight reliability of the electromagnetic actuator, avoid the generation of deformation gaps at the mating part of the valve sleeve and the valve housing due to the lateral force on the valve sleeve after the electromagnetic actuator works durably for a period of time, and effectively prevent problems such as air leakage, oil leakage, and dust accumulation of the electromagnetic actuator. It has outstanding advantages such as simple structure and low implementation cost.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic actuator sealing design, and particularly to an electromagnetic actuator sealing structure applied to a variable valve lift system of a fuel engine. Background Art

[0002] Variable valve lift systems are widely used in new automotive engines, which can improve the power and torque of the engine, reduce fuel consumption and exhaust emissions.

[0003] The electromagnetic actuator is an important component in a variable cam shift type variable valve lift system. It is energized according to the control signal sent by the engine control system. After being energized, the valve core extends and drives the axial movement of the cam sleeve, so as to switch to the cams with different lift curves to work. In order to prevent engine oil from leaking from the electromagnetic actuator and impurities from entering the electromagnetic actuator, the airtightness of the electromagnetic actuator needs to be ensured. At present, most electromagnetic actuators adopt an interference press-fitting structure, which can meet the airtightness requirements in the new part state. However, after the electromagnetic actuator works for a period of time, gaps are likely to occur at the mating part between the valve sleeve and the valve housing, eventually causing problems such as air leakage, oil leakage, and dust accumulation in the electromagnetic actuator, reducing the working reliability of the electromagnetic actuator. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: aiming at the problems existing in the prior art, to provide an electromagnetic actuator sealing structure to improve the airtight reliability of the electromagnetic actuator.

[0005] The technical problem to be solved by the present invention is realized by adopting the following technical solutions: an electromagnetic actuator sealing structure, including a valve sleeve and a valve housing. A socket-type fixed connection structure is formed between the valve sleeve and the valve housing. A relief groove is provided on the valve sleeve. A sealant is provided at the socket part between the valve sleeve and the valve housing, and a part of the sealant in the sealant is filled into the relief groove in an extrusion manner. A sealing structure is jointly formed among the valve sleeve, the sealant, and the valve housing.

[0006] Preferably, a glue storage groove is formed on the valve sleeve, and the glue storage groove is filled with sealant, and a sealing structure is formed between the sealant in the glue storage groove and the valve housing.

[0007] Preferably, the glue storage groove on the valve sleeve is a closed annular groove structure.

[0008] Preferably, a glue storage groove is formed on the valve housing, and the glue storage groove is filled with sealant, and a sealing structure is formed between the sealant in the glue storage groove and the valve sleeve.

[0009] Preferably, the glue storage groove on the valve housing is a closed annular groove structure.

[0010] Preferably, the cross-sectional shape of the glue storage groove is a rectangular structure.

[0011] Preferably, a limiting step is formed in the hollow cavity of the valve housing.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a relief groove on the valve sleeve and filling the sealing glue at the socket part between the valve sleeve and the valve housing into the relief groove in an extrusion manner, a sealing structure is jointly formed among the valve sleeve, the sealing glue, and the valve housing. This can not only ensure the connection strength between the valve sleeve and the valve housing, but also improve the airtight reliability of the electromagnetic actuator, avoiding the generation of deformation gaps at the mating part between the valve sleeve and the valve housing due to the lateral force on the valve sleeve after the electromagnetic actuator has worked durably for a period of time, effectively preventing problems such as air leakage, oil leakage, and dust accumulation in the electromagnetic actuator, and the structure is simple with low implementation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural sectional view of a sealing structure of an electromagnetic actuator according to the present invention (Embodiment 1).

[0014] Figure 2 is Figure 1 a schematic structural view of the valve sleeve in

[0015] Figure 3 is Figure 1 a schematic structural view of the valve housing in

[0016] Figure 4 It is a structural sectional view of a sealing structure of an electromagnetic actuator according to the present invention (Embodiment 2).

[0017] Figure 5 is Figure 4 a schematic structural view of the valve sleeve in

[0018] Figure 6 is Figure 4 a schematic structural view of the valve housing in

[0019] Component marking names in the figure: 1 - valve sleeve, 2 - sealing glue, 3 - valve housing, 4 - relief groove, 5 - limiting step, 6 - glue storage groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] Embodiment 1

[0022] As Figure 1The electromagnetic actuator sealing structure shown mainly includes a valve sleeve 1 and a valve housing 3. A relief groove 4 is provided on the valve sleeve 1, as shown in Figure 2 ; A limit step 5 is formed in the hollow cavity of the valve housing 3, as shown in Figure 3 , Figure 6 . A socket-type fixed connection structure is formed between the valve sleeve 1 and the valve housing 3. A sealant 2 is provided at the socket part between the valve sleeve 1 and the valve housing 3. Part of the sealant in the sealant 2 is filled into the relief groove 4 by extrusion. A sealing structure is jointly formed among the valve sleeve 1, the sealant 2, and the valve housing 3. Usually, the valve sleeve 1 and the valve housing 3 are assembled together by an interference fit. Before assembly, the sealant 2 is first applied to the connection part of the valve sleeve 1, and then the valve sleeve 1 is press-fitted onto the valve housing 3 by an interference fit; during the press-fitting process, part of the sealant 2 will be extruded downward, so that the excess sealant 2 is filled into the relief groove 4, making a sealing structure jointly formed among the valve sleeve 1, the sealant 2, and the valve housing 3, which can not only improve the connection strength between the valve sleeve 1 and the valve housing 3, but also improve the sealing reliability of the electromagnetic actuator.

[0023] To further improve the sealing reliability of the electromagnetic actuator, as shown in Figure 3 , a sealant storage groove 6 can be formed on the valve housing 3. The sealant storage groove 6 is filled with the sealant 2, and a sealing structure is formed between the sealant 2 in the sealant storage groove 6 and the valve sleeve 1. Before the valve sleeve 1 and the valve housing 3 are assembled by an interference fit, the sealant 2 is first applied to the sealant storage groove 6 on the valve housing 3 to fill the sealant storage groove 6 with the sealant 2; then, the valve sleeve 1 is press-fitted onto the valve housing 3 by an interference fit; during the press-fitting process, the excess sealant 2 in the sealant storage groove 6 will be extruded downward, so that the excess sealant 2 is filled into the relief groove 4. With such a structural design and assembly process, both the connection strength between the valve sleeve 1 and the valve housing 3 can be ensured, and the sealing reliability of the electromagnetic actuator can also be ensured. Usually, the sealant storage groove 6 on the valve housing 3 adopts a closed annular groove structure, and its cross-sectional shape preferably adopts a rectangular structure to better accommodate and store the sealant 2 and ensure that a sealing structure is jointly formed among the valve sleeve 1, the sealant 2, and the valve housing 3.

[0024] Embodiment 2

[0025] As shown in Figure 5 , a sealant storage groove 6 is formed on the valve sleeve 1, and the sealant storage groove 6 preferably adopts a closed annular groove structure. As shown in Figure 4As shown, the glue storage groove 6 is filled with the sealant 2, and a sealing structure is formed between the sealant 2 in the glue storage groove 6 and the valve housing 3. In this case, the processing is easier. Before assembling the valve sleeve 1 and the valve housing 3 in an interference fit manner, first apply the sealant 2 to the glue storage groove 6 on the valve sleeve 1 to fill the glue storage groove 6 with the sealant 2; then, press-fit the valve sleeve 1 onto the valve housing 3 in an interference fit manner; during the press-fitting process, the excess sealant 2 will be extruded and filled into the relief groove 4, so that a double seal can be formed by the interference fit structure and the sealant 2, avoiding the generation of deformation gaps at the mating part of the valve sleeve 1 and the valve housing 3 due to the lateral force on the valve sleeve 1 after the electromagnetic actuator works durably for a period of time, and preventing problems such as air leakage, oil leakage, and dust accumulation in the electromagnetic actuator.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic actuator sealing structure, comprising a valve sleeve (1) and a valve housing (3), wherein a socket-type fixed connection structure is formed between the valve sleeve (1) and the valve housing (3), and is characterized in that: A relief groove (4) is provided on the valve sleeve (1), a sealant (2) is provided at the socket part between the valve sleeve (1) and the valve housing (3), and a part of the sealant in the sealant (2) is filled into the relief groove (4) by extrusion. A sealing structure is jointly formed among the valve sleeve (1), the sealant (2), and the valve housing (3). A glue storage groove (6) is formed on the valve sleeve (1), the glue storage groove (6) is filled with the sealant (2), and a sealing structure is formed between the sealant (2) in the glue storage groove (6) and the valve housing (3). The glue storage groove (6) on the valve sleeve (1) is a closed annular groove structure. A glue storage groove (6) is formed on the valve housing (3), the glue storage groove (6) is filled with the sealant (2), and a sealing structure is formed between the sealant (2) in the glue storage groove (6) and the valve sleeve (1).

2. The electromagnetic actuator sealing structure according to claim 1, characterized in that: The glue storage groove (6) on the valve housing (3) is a closed annular groove structure.

3. An electromagnetic actuator sealing structure according to any one of claims 1-2, characterized in that: The cross-sectional shape of the glue storage groove (6) is a rectangular structure.

4. An electromagnetic actuator sealing structure according to any one of claims 1-3, characterized in that: A limit step (5) is formed in the hollow cavity of the valve housing (3).

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