Moving part provided with thread anti-loosening structure

Abstract

The utility model discloses a moving part provided with a thread anti-loose structure, which comprises a valve body, a mounting hole is arranged in the valve body, a baffle, a spring and a plug are sequentially arranged in the mounting hole from bottom to top, an internal thread is arranged at the position of the mounting hole close to an upper port, an external thread is arranged on the plug, the plug is in threaded connection with the mounting hole, and the spring is arranged in the mounting hole. And an anti-loose counter bore is formed in the outer wall of the valve body at the external thread of the mounting hole. The anti-loose counter bore is formed in the outer wall of the valve body at the position of the external thread of the mounting hole, after internal parts of a moving part are assembled, the thin wall of the valve body at the position of the anti-loose counter bore is extruded, so that the internal thread at the position of the mounting hole deforms, the plug cannot be screwed out in a threaded mode under the severe vibration environment, and therefore extrusion deformation and looseness prevention are achieved; the problem that threaded connection parts are loosened under violent vibration is effectively solved, and the use performance of moving parts is guaranteed.

Description

Technical Field

[0001] This utility model relates to a moving part structure, and more particularly to a moving part with a threaded anti-loosening structure. Background Technology

[0002] Some control valves have internal moving parts with interconnected threaded connections. When these valves are used under harsh conditions, such as those in aerospace equipment, the high speeds and airflow can cause severe vibrations. These vibrations can lead to loosening of the threaded connections, resulting in decreased performance or even failure of the moving parts. Therefore, preventing loosening of the threaded connections in such moving parts has become a pressing technical problem. Summary of the Invention

[0003] The purpose of this invention is to provide a moving part with a threaded anti-loosening structure. By providing an anti-loosening countersunk hole on the outer wall of the valve body, the thin wall of the valve body at the anti-loosening countersunk hole is compressed, thereby achieving compression deformation to prevent loosening, effectively solving the problem of loosening between threaded connection parts under severe vibration.

[0004] The technical solution of this utility model is as follows: A moving part with a threaded anti-loosening structure includes a valve body, an installation hole inside the valve body, a baffle, a spring and a screw plug are installed in the installation hole from bottom to top, wherein the installation hole is provided with an internal thread near the upper end, the screw plug is provided with an external thread, the screw plug is threadedly connected to the installation hole, and an anti-loosening countersunk hole is provided on the outer wall of the valve body at the external thread of the installation hole.

[0005] In the aforementioned moving part equipped with a threaded anti-loosening structure, two anti-loosening countersunk holes are symmetrically arranged on the left and right.

[0006] In the aforementioned moving part equipped with a threaded anti-loosening structure, the bottom of the anti-loosening countersunk hole is a flat-bottomed structure, and the thickness from the bottom to the inner wall of the mounting hole is 0.3 to 0.5 mm.

[0007] In the aforementioned moving part equipped with a threaded anti-loosening structure, the diameter of the anti-loosening countersunk hole is 1-3 mm.

[0008] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model provides an anti-loosening countersinking hole on the outer wall of the valve body at the external thread of the mounting hole. When the internal parts of the moving part are assembled, the thin wall of the valve body at the anti-loosening countersinking hole is squeezed, causing the internal thread at the mounting hole to deform. Under severe vibration, the screw plug cannot be unscrewed, thereby achieving compression deformation to prevent loosening. This effectively solves the problem of loosening between threaded connection parts under severe vibration and ensures the performance of the moving parts. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Attached reference numerals: 1-valve body, 2-baffle, 3-spring, 4-screw plug, 5-anti-loosening hole. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0012] An embodiment of this utility model: A moving part with a threaded anti-loosening structure includes a valve body 1. The valve body 1 has an installation hole inside. A baffle 2, a spring 3 and a screw plug 4 are installed in the installation hole from bottom to top. The installation hole has an internal thread near the upper end, and the screw plug 4 has an external thread. The screw plug 4 is threadedly connected to the installation hole. An anti-loosening countersunk hole 5 is provided on the outer wall of the valve body 1 at the external thread of the installation hole.

[0013] By providing an anti-loosening countersunk hole 5 on the outer wall of the valve body 1 at the external thread of the mounting hole, after the internal parts of the moving part (baffle 2, spring 3 and screw plug 4) are assembled, a pin is inserted into the anti-loosening countersunk hole 5 to squeeze the thin wall of the valve body 1 at the anti-loosening countersunk hole 5. Under the action of the squeezing force, the internal thread at the mounting hole is deformed. After the internal thread is deformed, the screw plug 4 cannot be screwed out under severe vibration, thus achieving compression deformation to prevent loosening. This effectively solves the problem of loosening between the threaded connection parts (valve body 1 and screw plug 4) under severe vibration, and ensures the performance of the moving part.

[0014] Two anti-loosening countersunk holes 5 are symmetrically arranged on the left and right sides. Simultaneously, the thin walls at both anti-loosening countersunk holes 5 are compressed and deformed, achieving a very good deformation-based anti-loosening effect. However, if too many anti-loosening countersunk holes 5 are provided or concentrated in one area, it can easily damage the structure of the valve body 1, leading to a reduction in its structural strength.

[0015] The bottom of the anti-loosening countersunk hole 5 is flat, which allows the bottom surface of the ejector pin to completely abut against the entire bottom surface of the anti-loosening countersunk hole 5. Under the extrusion pressure of the ejector pin, it is easier for the thin wall of the entire bottom of the anti-loosening countersunk hole 5 to deform as a whole. The thickness from the bottom of the anti-loosening countersunk hole 5 to the inner wall of the mounting hole is 0.3-0.5mm. If it is too thin, the thin wall at the anti-loosening countersunk hole 5 is easily punctured under the extrusion pressure of the ejector pin, and it cannot play a role in deformation and anti-loosening; if it is too thick, the thin wall cannot deform under the extrusion pressure of the ejector pin.

[0016] The anti-loosening countersink 5 has a diameter of 1-3mm, which facilitates the insertion of the pin into the anti-loosening countersink 5. At the same time, the anti-loosening countersink 5 of this size causes minimal damage to the structure of the valve body 1, thus ensuring the structural strength of the valve body 1.

Claims

1. A moving member provided with a thread locking structure, characterized by: The utility model relates to a valve body (1) is provided with installation hole inside, installation hole is equipped with baffle (2), spring (3) and screw plug (4) from bottom to top in sequence, wherein installation hole is provided with internal thread near upper end port, screw plug (4) is provided with external thread, screw plug (4) is connected with installation hole thread, and the outer wall of valve body (1) is provided with anti-loosening counterbore (5) at installation hole external thread place.

2. A moving element provided with a thread locking structure according to claim 1, characterized in that: The anti-loosening counterbore (5) is provided with two left and right symmetrical.

3. A moving element provided with a thread locking structure according to claim 1, characterized in that: The anti-loosening counterbore (5) bottom is flat bottom structure, and the thickness from bottom to installation hole inner wall is 0.3-0.5mm.

4. The moving element provided with the thread locking structure according to claim 1, characterized in that: The anti-loosening counterbore (5) diameter is 1-3mm.

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