Non-loosening screw

Abstract

A non-loosening screw, comprising a nut (1), a spring washer (2) and a screw shaft (3). A circle of hemispherical recesses (11) are formed in the bottom of the nut (1). The spring washer (2) is a D-shaped spring washer (2), a protrusion (21) is formed at the top end of the spring washer (2), and one end of the inner circle of the D-shaped spring washer (2) is a straight edge (22). One end of the screw shaft (3) is a fixed nut, and threads on one side of a threaded segment on the other end of the screw shaft (3) are axially cut to form a flat and straight section (31). During the screwing-in of the nut (1), under the continuous compression action of the spring washer (2), the hemispherical recesses (11) of the nut (1) and the protrusion (21) of the spring washer (2) are mutually restricted, and the straight edge (22) of the spring washer (2) and the straight edge of the section (31) of the screw shaft (3) are mutually restricted, so that the nut (1) and the screw shaft (3) are tightly combined; and when the nut (1) is tightly screwed, the nut (1) can neither rotate left or right nor slide up or down, thereby achieving the objectives of locking workpieces and preventing same from loosening.

Description

Do not loosen the screws Technical Field

[0001] The utility model relates to the technical field of screw manufacturing, and is a non-loosening screw with a hemispherical pit and a straight edge. Background Art

[0002] Screws are widely used fasteners. They are required for permanent fixation in mechanical equipment, vehicles, rails, high-speed rotating or moving equipment, etc. However, most current screw products will gradually loosen and even come loose under long-term mechanical vibration, posing a serious hidden danger to the operation of mechanical equipment or transportation, and even causing safety accidents. Therefore, improving existing screw technology is a major issue that urgently needs to be addressed in the screw industry.

[0003] Utility Model Content

[0004] A screw that does not loosen includes: a nut 1, a spring washer 2, and a screw 3; the nut 1 has a circle of hemispherical pits 11 at the bottom; the spring washer 2 is a D-shaped spring washer with a protrusion 21 at the top, and one end of the inner circle of the D-shaped spring washer is a straight edge 22; the screw 3 has a fixed nut at one end, and the threaded section at the other end has one side of the thread cut into a straight cross-section 31 along the axial direction.

[0005] Furthermore, the nut 1 of the non-loosening screw is provided with a normal internal thread, and a circle of hemispherical pits 11 is provided at the bottom of the nut.

[0006] Furthermore, the non-loosening screw has a D-shaped spring washer with a protrusion 21 on the top, and one end of the inner circle of the D-shaped spring washer is a straight edge 22; the protrusion 21 of the D-shaped spring washer corresponds to the hemispherical pit 11 of the nut, and the straight edge of the D-shaped spring washer corresponds to the cross-section 31 of the screw 3 described below.

[0007] Furthermore, the non-loosening screw has a fixed nut at one end of its screw rod and a threaded section at the other end, and the thread on one side of the threaded section is cut into a straight cross-section 31 along the axial direction.

[0008] The utility model has the advantages of simple parts, strong fastening effect, good versatility, simple processing steps, wide application range, and is suitable for use in places where fastening parts that do not loosen are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a three-dimensional schematic diagram of the overall state of the screw;

[0010] Figure 2 is a schematic diagram of a nut from above;

[0011] Figure 3 is a schematic diagram of a spring washer from above;

[0012] Figure 4 is a schematic diagram of a screw viewed from above;

[0013] Figure 5 is a schematic diagram of screw installation.

[0014] Among them: nut 1, hemispherical pit 11; spring washer 2, protrusion 21, straight edge 22; screw 3, cross section 31. Specific implementation method:

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] 1 to 5 , the specific implementation method is as follows: pass the screw rod 3 through the workpiece to be tightened, and then insert the D-shaped spring washer 2, with the straight edge 22 of the D-shaped spring washer 2 aligned with the cross-section 31 of the screw rod 3 and the raised side facing outward. After inserting the D-shaped spring washer 2, the spring washer 2 cannot rotate left or right, but can only slide up and down along the screw rod 3; then screw in the nut 1, with the hemispherical pit 11 of the nut facing inward; then gradually tighten the nut 1, and under the action of gradually compressing the D-shaped spring washer 2, the nut 1 and the spring washer 2 gradually fit together; continue until the nut 1 is completely tightened, at which point the nut 1 and the D-shaped spring washer 2 completely fit each other, and the protrusion 21 of the D-shaped spring washer 2 is embedded in the hemispherical pit 11 of the nut 1, preventing the nut from rotating and loosening. Therefore, the nut cannot rotate left or right and loosen, nor can it move up and down, achieving the effect of not loosening.

[0017] The screw parts of the utility model are simple, can be used as a universal screw, has a wide range of applications, has a simple overall production process, can be mechanized and mass-produced, and is worthy of vigorous promotion and use.

[0018] The above description is only a preferred embodiment of the present invention, and the above specific embodiments are not limitations of the present invention. Various deformations and modifications may occur within the technical scope of the present invention. Any embellishments, modifications or equivalent substitutions made by ordinary technicians in this field based on the above description are within the scope of protection of the present invention.

Claims

1. A screw that does not loosen, comprising: A nut (1), a spring washer (2), and a screw (3); the characteristics are that the bottom of the nut (1) is provided with a circle of hemispherical pits (11); the spring washer (2) is a D-shaped spring washer, the top of which is provided with a protrusion (21), and the inner circle of the D-shaped spring washer has a straight edge (22) at one end; the screw (3) has a fixed nut at one end, and on the threaded section at the other end, one side of the thread is cut into a straight section (31) along the axial direction.

2. The fixed screw according to claim 1, characterized in that: The nut (1) is provided with a normal internal thread, and a circle of hemispherical pits (11) is provided at the bottom of the nut.

3. The fixed screw according to claim 1, characterized in that: The D-shaped spring washer has a protrusion (21) at the top, and one end of the inner circle of the D-shaped spring washer is a straight edge (22); the protrusion (21) of the D-shaped spring washer corresponds to the hemispherical pit (11) of the nut, and the straight edge of the D-shaped spring washer corresponds to the cross section (31) of the screw (3) described below.

4. The fixed screw according to claim 1, characterized in that: One end of the screw rod is a fixed nut, and the other end is a threaded section, wherein the thread on one side of the threaded section is cut into a straight section (31) along the axial direction.

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