Anti-loosening stud

Abstract

The utility model discloses an anti-loosening stud, which relates to the technical field of studs and comprises a screw rod and a hexagonal screw rod cap, the hexagonal screw rod cap is mounted on the upper wall surface of the screw rod, a limiting structure is mounted on the lower wall surface of the hexagonal screw rod cap, and a locking structure is sleeved outside the screw rod; the limiting structure comprises a limiting sleeve plate and eight limiting triangular plates; the limiting sleeve plate is fixedly arranged on the lower wall surface of the hexagonal screw cap; the eight limiting triangular plates are respectively arranged on the lower wall surface of the limiting sleeve plate; the locking structure comprises a locking sleeve plate and eight locking spring plates; the screw rod is movably sleeved with the locking sleeve plate, and the eight locking spring plates are fixedly installed on the upper wall face of the locking sleeve plate. By means of the mechanical structure, the situation that the stud is loosened due to vibration can be avoided, when the stud rotates reversely due to vibration, the stud can be clamped by the mechanical structure, and therefore the stud is prevented from being loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of studs, in particular to an anti-loosening stud. Background Art

[0002] A stud is a mechanical part, a cylindrical threaded fastener equipped with a nut. It is a type of fastener consisting of a head and a screw. It needs to be matched with a nut and is used to fasten two parts with through holes. This type of connection is called a stud connection. If the nut is unscrewed from the stud, the two parts can be separated, so the stud connection is a detachable connection.

[0003] At present, studs may become loose during use. There are many reasons for this, including vibration, impact, long-term use, excessive load, high operating temperature, environmental corrosion, etc. Some of them, such as vibration, cause the studs to loosen, which often occurs in some transmission mechanical mechanisms and needs to be avoided. Otherwise, the loose studs will cause damage to the transmission mechanical mechanism. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and propose an anti-loosening stud. The utility model can prevent the stud from loosening due to vibration through a mechanical structure. When the stud rotates in the opposite direction due to vibration, it will be stuck by the mechanical structure, thereby preventing the stud from loosening.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A stud to prevent loosening, comprising: a screw and a hexagonal screw cap, wherein the hexagonal screw cap is mounted on the upper wall of the screw, the lower wall of the hexagonal screw cap is mounted with a limiting structure, and a locking structure is sleeved on the outside of the screw; the limiting structure comprises: a limiting sleeve and eight limiting triangular plates; the limiting sleeve is fixedly mounted on the lower wall of the hexagonal screw cap, and the eight limiting triangular plates are respectively mounted on the lower wall of the limiting sleeve; the locking structure comprises: a locking sleeve and eight locking spring plates; the locking sleeve is movably sleeved on the outside of the screw, and the eight locking spring plates are respectively fixedly mounted on the upper wall of the locking sleeve.

[0007] The utility model is further configured that the limiting triangle plate can be buckled with the locking spring plate.

[0008] The utility model is further configured that a rubber gasket is installed on the lower wall surface of the locking sleeve.

[0009] The utility model is further configured that the lower wall surface of the rubber gasket is provided with convex points which increase the friction force.

[0010] The utility model is further configured that the upper half of the screw rod has no threads.

[0011] The utility model is further configured such that the diameter of the limiting sleeve is 1.1 times the diameter of the circumscribed circle of the hexagonal screw cap.

[0012] The utility model is further configured such that the diameter of the limiting sleeve is the same as the diameter of the locking sleeve.

[0013] The beneficial effect of the utility model is that the utility model can prevent the stud from loosening due to vibration through the mechanical structure. When the stud rotates in the opposite direction due to vibration, it will be stuck by the mechanical structure, thereby preventing the stud from loosening.

[0014] By providing a limiting structure and a locking structure, the limiting structure and the locking structure cooperate to prevent the screw from rotating in the opposite direction, thereby preventing the screw from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an anti-loosening stud proposed by the utility model;

[0016] Figure 2 A schematic diagram of a first partial structure of an anti-loosening stud proposed by the utility model;

[0017] Figure 3 A second partial structural schematic diagram of an anti-loosening stud proposed by the utility model;

[0018] Figure 4 This is a schematic diagram of a third partial structure of an anti-loosening stud proposed by the utility model.

[0019] In the figure: 1. Screw; 2. Hexagonal screw cap; 3. Limit sleeve; 4. Limit triangle plate; 5. Locking sleeve; 6. Locking spring plate; 7. Rubber gasket. DETAILED DESCRIPTION

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0023] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0024] Reference Figure 1-4 , an anti-loosening stud, comprising: a screw 1 and a hexagonal screw cap 2, the hexagonal screw cap 2 is installed on the upper wall of the screw 1, the lower wall of the hexagonal screw cap 2 is installed with a limiting structure, and the screw 1 is externally provided with a locking structure;

[0025] Specifically, the limiting structure includes: a limiting sleeve 3 and eight limiting triangle plates 4; the limiting sleeve 3 is fixedly mounted on the lower wall surface of the hexagonal screw cap 2, and the eight limiting triangle plates 4 are respectively mounted on the lower wall surface of the limiting sleeve 3;

[0026] Specifically, the locking structure includes: a locking sleeve 5 and eight locking spring plates 6; the locking sleeve 5 is movably sleeved on the outside of the screw 1, and the eight locking spring plates 6 are respectively fixedly mounted on the upper wall surface of the locking sleeve 5. With the cooperation of the limiting structure and the locking structure, the screw can be prevented from rotating in the opposite direction, thereby preventing the screw from loosening.

[0027] Specifically, the limiting triangle plate 4 can be buckled with the locking spring plate 6, the lower wall of the locking sleeve 5 is installed with a rubber gasket 7, and the lower wall of the rubber gasket 7 is provided with a protrusion to increase the friction force. The upper half of the screw 1 has no threads, and the diameter of the limiting sleeve 3 is 1.1 times the diameter of the circumscribed circle of the hexagonal screw cap 2. The diameter of the limiting sleeve 3 is the same as the diameter of the locking sleeve 5.

[0028] Working principle: When using the utility model, it is first necessary to make a countersunk hole with a diameter slightly larger than that of the locking sleeve 5, and then place the locking sleeve 5 directly inside the countersunk hole, and let the rubber gasket 7 be at the bottom of the countersunk hole. Then the operator twists the screw 1 into the threaded hole through the hexagonal screw cap 2. When the screw 1 continues to rotate, the distance between the limit sleeve 3 and the locking sleeve 5 continues to decrease until the eight limit triangle plates 4 and the eight locking spring plates 6 are in contact. When the screw 1 rotates in the locking direction, the limit triangle plate 4 will press the locking spring plate 6 to deform downward and rotate smoothly. Due to the downward pressure of the limit triangle plate 4, the locking sleeve 5 can generate downward pressure. Under the action of the rubber gasket 7, the locking sleeve 5 can prevent rotation until the locking work of the screw 1 is finally completed. When the screw 1 rotates in a certain direction, the limit triangle plate 4 will engage with the locking spring plate 6 to prevent the screw 1 from loosening.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anti-loosening stud, comprising: A screw rod (1) and a hexagonal screw rod cap (2), wherein the hexagonal screw rod cap (2) is mounted on the upper wall surface of the screw rod (1), characterized in that a limiting structure is mounted on the lower wall surface of the hexagonal screw rod cap (2), and a locking structure is mounted on the outside of the screw rod (1); The limiting structure comprises: a limiting sleeve plate (3) and eight limiting triangle plates (4); The limiting sleeve (3) is fixedly mounted on the lower wall surface of the hexagonal screw cap (2), and the eight limiting triangle plates (4) are respectively mounted on the lower wall surface of the limiting sleeve (3); The locking structure comprises: a locking sleeve plate (5) and eight locking spring plates (6); The locking sleeve (5) is movably sleeved on the outside of the screw rod (1), and the eight locking spring plates (6) are respectively fixedly mounted on the upper wall surface of the locking sleeve (5).

2. The anti-loosening stud according to claim 1, characterized in that: The limiting triangle plate (4) can be buckled with the locking spring plate (6).

3. The anti-loosening stud according to claim 1, characterized in that: A rubber gasket (7) is installed on the lower wall surface of the locking sleeve (5).

4. The anti-loosening stud according to claim 3, characterized in that: The lower wall surface of the rubber gasket (7) is provided with convex points for increasing friction.

5. The anti-loosening stud according to claim 1, characterized in that: The upper part of the screw (1) has no threads.

6. The anti-loosening stud according to claim 1, characterized in that: The diameter of the limiting sleeve (3) is 1.1 times the diameter of the circumscribed circle of the hexagonal screw cap (2).

7. The anti-loosening stud according to claim 1, characterized in that: The diameter of the limiting sleeve (3) is the same as the diameter of the locking sleeve (5).

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