Sealing structure of outboard engine hydraulic upwarp one-way valve

Abstract

The sealing structure comprises a valve body, a valve cavity, a fluid inlet and a fluid outlet are formed in the valve body, the fluid inlet and the fluid outlet are communicated with the valve cavity, and a steel ball, a steel ball seat and a spring are arranged in the valve cavity; the steel ball seat is in contact connection with the steel ball and can apply elastic force to the steel ball to enable the steel ball to movably abut against the fluid inlet under the action of the spring; an annular spherical surface capable of being tightly attached to the steel ball is formed at the abutting position of the fluid inlet and the steel ball through extrusion of the steel ball during assembly, and the annular spherical surface is directly formed by extrusion of the steel ball, so that the annular spherical surface can be better attached to the surface of the steel ball, leakage gaps caused by machining deviation are effectively eliminated, and the service life of the fluid inlet is prolonged. And the sealing reliability between the steel ball and the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, and particularly relates to a sealing structure of a hydraulic tilting check valve for an outboard engine. Background Art

[0002] A check valve, also known as a non-return valve or a reflux valve, is used in a hydraulic system to prevent the reverse flow of oil, or in a pneumatic system to prevent the reverse flow of compressed air. As Figure 1 shown, a traditional hydraulic tilting check valve for an outboard engine mainly includes a valve body 1, a steel ball 4, a steel ball seat 5 and a spring 6. The steel ball 4 can be movably abutted against a fluid inlet 3 of the valve body 1 under the action of the spring 6, so as to realize the one-way conduction of the valve body 1. The contact seal between the steel ball 4 and the valve body 1 of the existing hydraulic tilting check valve for an outboard engine is a linear seal, which has high requirements for the machining accuracy of parts. If there are deviations in the machining of parts, the seal line between the valve body 1 and the steel ball 4 may not be completely sealed, resulting in leakage of the check valve and affecting the hydraulic tilting working performance of the outboard engine.

[0003] Therefore, it is necessary to develop a sealing structure of a hydraulic tilting check valve for an outboard engine to solve the above technical problems. Summary of the Utility Model

[0004] An embodiment of the utility model provides a sealing structure of a hydraulic tilting check valve for an outboard engine to solve the technical problem that the seal between the steel ball and the valve body of the existing check valve is prone to leakage.

[0005] A sealing structure of a hydraulic tilting check valve for an outboard engine provided by an embodiment of the utility model includes a valve body. A valve cavity, a fluid inlet and a fluid outlet communicated with the valve cavity are arranged in the valve body. A steel ball, a steel ball seat and a spring are arranged in the valve cavity. The steel ball seat is in contact connection with the steel ball and can apply an elastic force to the steel ball under the action of the spring to make the steel ball movably abut against the fluid inlet. An annular spherical surface capable of being hermetically attached to the steel ball is formed by extrusion of the steel ball at the abutting position between the fluid inlet and the steel ball during assembly.

[0006] Optionally, the hardness of the steel ball is greater than the hardness of the valve body.

[0007] Optionally, the steel ball is made of bearing steel ball.

[0008] Optionally, the width of the annular spherical surface is controlled within 0.1 mm to 0.2 mm.

[0009] The embodiments of the present utility model have the following beneficial effects: By utilizing the characteristic that the hardness of the steel ball is greater than that of the valve body, during assembly, a spherical surface that can be hermetically and perfectly fitted with the steel ball is formed by the extrusion of the steel ball at the contact between the fluid inlet and the steel ball, so that an annular sealing band can be formed between the valve body and the steel ball; Since this spherical surface is directly formed by the extrusion of the steel ball, it can better fit the surface of the steel ball, effectively eliminating the leakage gap caused by processing deviation and improving the sealing reliability between the steel ball and the valve body. Brief Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0011] Figure 1 It is a schematic diagram of the sealing structure of an existing hydraulic tilting one-way valve for an outboard engine;

[0012] Figure 2 It is a schematic diagram of the structure of the embodiments of the present utility model;

[0013] The numbers in the figure represent:

[0014] 1, valve body; 2, valve cavity; 3, fluid inlet; 4, steel ball; 5, steel ball seat; 6, spring; 7, spherical surface. Detailed Embodiments

[0015] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0016] Please refer to Figure 2As shown in the figure, an embodiment of the present utility model provides a sealing structure for a one-way valve of an outboard engine hydraulic lifting. It includes a valve body 1, a valve cavity 2 is provided in the valve body 1, and a fluid inlet 3 and a fluid outlet (not shown in the figure) connected to the valve cavity 2. Among them, a steel ball 4, a steel ball seat 5 and a spring 6 are arranged in the valve cavity 2. The steel ball seat 5 is in contact connection with the steel ball 4 and can apply an elastic force to the steel ball 4 under the action of the spring 6, so that the steel ball 4 can be movably abutted against the fluid inlet 3. The fluid medium flows into the valve body 1 from the fluid inlet 3 and applies a force to the steel ball 4. When the pressure applied by the fluid medium to the steel ball 4 is greater than the elastic force applied by the steel ball seat 5 to the steel ball 4, the steel ball 4 can move in a direction away from the fluid inlet 3, so that the fluid medium can smoothly flow into the valve cavity 2 and flow out through the fluid outlet, realizing the one-way conduction of the valve body 1.

[0017] In order to ensure the sealing performance between the steel ball 4 and the valve body 1, in the embodiment of the present utility model, during assembly, an annular spherical surface 7 that can be hermetically fitted with the steel ball 4 is formed by extrusion at the abutting position between the fluid inlet 3 and the steel ball 4. Since this annular spherical surface 7 is directly formed by extruding the steel ball 4, it can better fit the surface of the steel ball 4, thereby forming a completely sealed annular sealing band between the valve body 1 and the steel ball 4 (as shown by the black shaded area in Figure 2 ), which can effectively eliminate the leakage gap caused by processing deviation and improve the sealing reliability between the steel ball 4 and the valve body 1.

[0018] Specifically, during assembly, the valve body 1 can be fixed on the workbench of the hydraulic press with a tooling. After the steel ball 4 is placed in the valve cavity 2 of the valve body 1, the steel ball 4 is stamped by the press head of the hydraulic press, and the annular spherical surface 7 can be formed by extrusion at the abutting position between the fluid inlet 3 and the steel ball 4.

[0019] It should be noted that in order to ensure that the annular spherical surface 7 can be smoothly extruded and formed, the hardness of the steel ball 4 needs to be greater than that of the valve body 1. Therefore, the steel ball 4 can be selected as a bearing steel ball with a relatively high hardness. In addition, to ensure the sealing effect, the width of the annular spherical surface 7 is preferably controlled within 0.1 mm to 0.2 mm.

[0020] In this article, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present utility model; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A sealing structure of a one-way valve for hydraulic lifting of an outboard motor, characterized in that: It includes a valve body, a valve cavity is provided in the valve body, as well as a fluid inlet and a fluid outlet that are communicated with the valve cavity. A steel ball, a steel ball seat and a spring are arranged in the valve cavity; the steel ball seat is in contact connection with the steel ball and can apply an elastic force to the steel ball under the action of the spring to make the steel ball abut against the fluid inlet movably; an annular spherical surface that can be hermetically fitted with the steel ball is formed by extrusion of the steel ball at the abutting position between the fluid inlet and the steel ball during assembly.

2. The sealing structure of a hydraulic tilting one-way valve for an outboard motor according to claim 1, characterized in that: The hardness of the steel ball is greater than the hardness of the valve body.

3. The sealing structure of a hydraulic tilting one-way valve for an outboard motor according to claim 2, characterized in that: The steel ball is made of bearing steel ball.

4. The sealing structure of a hydraulic tilting one-way valve for an outboard motor according to claim 1, characterized in that: The width of the annular spherical surface is controlled within 0.1 mm to 0.2 mm.

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