Lip seal sealing structure for stiffness valve

Abstract

The lip seal sealing structure for the rigidity valve comprises a lip seal, a static core, a valve rod and a valve framework, the valve rod penetrates through the static core, the valve framework is installed at the right side end of the valve rod, the lip seal is arranged in the static core, and annular grooves are distributed in the outer circumference of the valve framework. The utility model has the advantages of simple structure and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a lip seal structure for a rigidity valve. Background Art

[0002] The stiffness valve adjusts the hardness of the suspension in real time based on factors such as vehicle speed, road conditions and load to provide optimal suspension performance and driving comfort. It is a vital component in the air suspension system and plays a vital role in improving the vehicle's suspension performance and driving comfort.

[0003] Existing stiffness valves, such as patent application number CN202322326956.8, disclose an elastic guide ring, a moving iron core guide structure and a solenoid valve, and patent application number CN202410944577.1 discloses a valve core assembly for an air spring stiffness valve and an air spring stiffness valve. The above two existing stiffness valves use sliding seals between the valve frame and the rubber parts on the lip seal. The rubber on the lip seal wraps the metal valve frame or is directly built into the valve assembly. The lip seal is fixed on the static core. The valve frame is pushed back and forth in the lip seal by the valve stem, and the rubber part on the lip seal or the valve frame is in a compressed state for a long time. During the operation of the stiffness valve, the valve frame and the rubber part on the lip seal rub back and forth, which easily causes permanent deformation and fatigue failure of the rubber, reducing the service life of the product. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a lip seal sealing structure for a rigid valve, which has a simple structure and a long service life.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A lip seal sealing structure for a rigid valve comprises a lip seal, a static core, a valve stem and a valve frame. The valve stem passes through the static core, the valve frame is mounted on the right end of the valve stem, the lip seal is built into the static core, and annular grooves are distributed on the outer circumference of the valve frame.

[0007] A further technical solution is that the annular groove has an inverted "trapezoidal" structure, and the annular groove is inclined outward along the left and right sides of the ring. When the lip seal moves left and right on the outer circumferential surface of the valve frame, the lip seal is not easily worn when passing through the inclined angles on the left and right sides of the annular groove. If it is in direct contact and friction and moves left and right for a long time, there will be certain wear.

[0008] The beneficial effects of the utility model are:

[0009] The utility model discloses a lip seal sealing structure for a rigid valve. Compared with the valve frame of the old structure, the new valve frame utilizes the lip seal to move left and right at the annular groove and the circumferential surface area of ​​the valve frame excluding the annular groove, so that the lip seal can be switched between a free state and a compressed state from a structural perspective, thereby effectively extending the service life of the rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 This is a schematic diagram of the original valve skeleton;

[0012] Figure 2 This is a structural schematic diagram of a lip seal sealing structure for a rigid valve according to the present invention;

[0013] Figure 3 This is a schematic diagram of a valve frame in a lip seal sealing structure for a rigid valve according to the present invention;

[0014] Figure 4 This is a front view of a valve frame in a lip seal sealing structure for a rigid valve according to the present invention;

[0015] Figure 5 This is a schematic diagram of a lip seal sealing structure for a rigid valve according to the present invention, wherein the lip seal is located in a non-sealing working area on the valve frame;

[0016] Figure 6 For this utility model Figure 5 The enlarged schematic diagram at A in the middle;

[0017] Figure 7 This is a schematic diagram of a valve frame located in a sealing working area in a lip seal sealing structure for a rigid valve according to the present invention;

[0018] Figure 8 For this utility model Figure 7 The enlarged schematic diagram at point B in the middle;

[0019] Figure 9 This is a schematic diagram of a lip seal sealing structure for a rigidity valve installed on a rigidity valve according to the utility model.

[0020] Figure 1-7 Middle: 1-static core, 2-valve stem, 3-valve frame, 4-lip seal, 5-annular groove. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] See Figures 1 to 9 As shown, a lip seal sealing structure for a rigid valve includes a lip seal 4, a static core 1, a valve stem 2 and a valve frame 3. The valve stem 2 passes through the static core 1, the valve frame 3 is installed at the right end of the valve stem 2, the lip seal 4 is built into the static core 1, and an annular groove 5 is distributed on the outer circumference of the valve frame 3. In this embodiment, the annular groove 5 is distributed at one end each at the left and right ends of the outer circumferential surface of the valve frame 3.

[0023] The annular groove 5 has an inverted "trapezoidal" structure. The annular groove 5 is tilted outward along the left and right sides of the ring. When the lip seal 4 moves left and right on the outer circumferential surface of the valve frame 3, the lip seal 4 is not easily worn when passing through the tilted angles on the left and right sides of the annular groove 5. If it is in direct contact and friction and moves left and right for a long time, there will be certain wear.

[0024] In this embodiment, the valve frame 3 structurally distinguishes the sealing working area (the outer circumferential surface area of ​​the valve frame 3 except the annular groove 5) from the non-sealing working area (the annular groove 5). In the non-sealing working area, Figure 5 and Figure 6 As shown, the left and right ends of the lip seal 4 are located in the annular groove 5 and are in a free state. When the valve stem 2 pushes the valve frame 3 to move to the right, as shown in FIG. Figure 7 and Figure 8 As shown, the lip seal 4 enters the sealing working area. At this time, the lip seal 4 is in a compressed state to achieve the sealing function. Compared with the valve frame of the old structure, the new valve frame 3 structurally allows the lip seal 4 to switch between the free state and the compressed state, which can effectively extend the service life of the rubber.

[0025] During operation, a layer of grease usually forms on the surface of the valve frame 3 to provide lubrication. The height difference between the sealing working area and the non-sealing working area on the valve frame 3 allows the non-sealing working area to also serve as a grease storage area. During the movement of the valve frame 3, the lip seal 4 will be stained with grease, which not only has a lubricating effect but also reduces fatigue wear of the lip seal 4.

[0026] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or replacements that are not conceived through creative work should be included in the protection scope of the present invention.

Claims

1. A lip seal sealing structure for a rigid valve, characterized by: It includes a lip seal, a static core, a valve stem and a valve frame. The valve stem passes through the static core. The valve frame is installed on the right end of the valve stem. The lip seal is built into the static core. An annular groove is distributed on the outer circumference of the valve frame.

2. A lip seal structure for a rigid valve according to claim 1, characterized in that: The annular groove has an inverted "trapezoidal" structure.

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