Self-locking square locking nut

Abstract

The utility model discloses a self-locking square locking nut which comprises a nut body, an annular cavity is formed in the nut body, a rotating ring is arranged in the annular cavity through a supporting mechanism, a driving gear is arranged in the annular cavity through a torsion spring, a rotating rod is installed on the driving gear, and the rotating rod is connected with the rotating ring. The driving gear is connected with the rotating ring through a rotating mechanism, a screw rod is arranged in the annular cavity through a hoisting mechanism, the screw rod is connected with the rotating ring through a transmission mechanism, and the screw rod is sleeved with a self-locking plate in a threaded mode, and the self-locking plate extends to a notch in the center of the nut body. According to the utility model, the special self-locking plate and the self-locking groove corresponding to the self-locking plate are arranged. By means of the structure, the self-locking position is more accurate, it can be ensured that the nut is accurately self-locked at the specific position, and the reliability and stability of self-locking are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to a self-locking square locking nut. Background Art

[0002] Square lock nuts are square in shape, distinct from more common round nuts. This square design offers unique advantages in specific applications. They are widely used in machinery manufacturing, the automotive industry, aerospace, and other fields. In machinery manufacturing, they are used to connect various machine tools, transmissions, and other equipment; in the automotive industry, they are used to fasten key components such as engines and chassis.

[0003] Self-locking methods for square lock nuts include deformation self-locking, insert self-locking (nylon inserts and metal locking plates), and special thread structure self-locking (eccentric threads and variable-pitch threads). The disadvantages of deformation self-locking are high machining precision requirements, poor reusability, and significant environmental impact; the disadvantages of nylon inserts are limited corrosion resistance, low strength, and temperature sensitivity; the disadvantages of metal locking plates are difficulty in installation, potential damage to the bolt, and high cost; the disadvantages of eccentric threads are complex machining and design difficulties; and the disadvantages of variable-pitch threads are difficulty in machining, high cost, and significant precision-dependent self-locking performance. To address these issues, a self-locking square lock nut is proposed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a self-locking square lock nut.

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

[0006] A self-locking square locking nut comprises a nut body, an annular cavity is provided inside the nut body, a rotating ring is provided in the annular cavity via a supporting mechanism, a driving gear is provided in the annular cavity via a torsion spring, a rotating rod is mounted on the driving gear, the driving gear is connected to the rotating ring via a rotating mechanism, a screw is provided in the annular cavity via a lifting mechanism, the screw is connected to the rotating ring via a transmission mechanism, and a self-locking plate is provided on the threaded sleeve of the screw extending to the center notch of the nut body.

[0007] Preferably, the support mechanism comprises a support ring mounted on the rotating ring, an annular groove corresponding to the support ring is provided on the bottom wall of the annular cavity, and the vertical cross-section of the support ring and the annular groove are both L-shaped.

[0008] Preferably, the rotating mechanism comprises a side gear ring mounted on the arc-shaped inner wall of the rotating ring, and the side gear ring is engaged with the driving gear.

[0009] Preferably, the transmission mechanism includes an upper gear ring mounted on the upper end surface of the rotating ring, and the screw is provided with a transmission gear meshing with the upper gear ring.

[0010] Preferably, a toggle groove is provided on the outer wall of the nut body, and the rotating rod rotates through the bottom wall of the annular cavity and extends into the toggle groove.

[0011] Preferably, the self-locking plate is L-shaped, and the lengths of the vertical parts of the plurality of self-locking plates are designed to be incremental.

[0012] Beneficial effects of the utility model:

[0013] 1. Special self-locking plate and corresponding self-locking groove. This structure makes the self-locking position more precise, ensuring that the nut can accurately self-lock at a specific position, greatly improving the reliability and stability of the self-locking.

[0014] 2. During installation, the self-locking plate can be moved to a position that does not affect the installation of the nut. After the nut is installed in the appropriate position, the torsion spring can be used to move the self-locking plate into the self-locking groove to achieve self-locking. This adjustability makes nut installation more flexible and convenient, adapting to different installation scenarios and requirements.

[0015] 3. Through the cooperation of a series of transmission mechanisms, including the driving gear, rotating ring, upper gear ring, transmission gear and screw, the external force is accurately transmitted to the self-locking plate, realizing the self-locking function. This transmission method makes the self-locking process smoother and reduces the possibility of self-locking failure or misoperation due to poor transmission.

[0016] 4. Multiple self-locking plates are evenly spaced around the circumference, and the vertical lengths are designed to increase in length, forming a spiral pattern. This design not only facilitates the use of self-locking grooves on screws or bolts that are also distributed in a spiral pattern, but also enables the self-locking plates to better withstand forces from different directions after entering the self-locking grooves, thereby improving the security of the self-locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a self-locking square lock nut proposed by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the vertical cross-section structure;

[0019] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A.

[0020] In the figure: 1 nut body, 2 annular cavity, 3 rotating ring, 4 supporting ring, 5 annular groove, 6 rotating rod, 7 torsion spring, 8 driving gear, 9 toggle groove, 10 lifting plate, 11 screw, 12 transmission gear, 13 upper ring gear, 14 side ring gear, 15 self-locking plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-3 A self-locking square locking nut includes a nut body 1, an annular cavity 2 is provided inside the nut body 1, a rotating ring 3 is provided in the annular cavity 2 through a supporting mechanism, a driving gear 8 is provided in the annular cavity 2 through a torsion spring 7, a rotating rod 6 is installed on the driving gear 8, and the driving gear 8 is connected to the rotating ring 3 through a rotating mechanism, a screw 11 is provided in the annular cavity 2 through a lifting mechanism, the screw 11 is connected to the rotating ring 3 through a transmission mechanism, and a self-locking plate 15 is provided on the threaded sleeve of the screw 11 extending to the center notch of the nut body 1. The number of self-locking plates 15 in this solution is four, and the four self-locking plates 15 are designed to be distributed at equal intervals in the circumferential direction. A self-locking groove corresponding to the self-locking plate 15 is provided on the corresponding bolt. Since the shape and structure of the self-locking plate 15 are known, the self-locking groove can be easily imagined, so its specific shape is not disclosed in this solution.

[0023] The support mechanism includes a support ring 4 mounted on a rotating ring 3. An annular groove 5 corresponding to the support ring 4 is provided on the inner bottom wall of the annular cavity 2. Both the support ring 4 and the annular groove 5 are L-shaped in vertical cross-section. This shape design allows the support ring 4 to rotate only within the annular groove 5 and prevent it from moving vertically out of the groove 5.

[0024] The rotating mechanism includes a side gear ring 14 mounted on the arc-shaped inner wall of the rotating ring 3, and the side gear ring 14 is engaged with the driving gear 8. The teeth of the side gear ring 14 are arranged on its arc-shaped inner wall and mesh with the teeth on the arc-shaped outer wall of the driving gear 8.

[0025] The transmission mechanism includes an upper gear ring 13 mounted on the upper end surface of the rotating ring 3, and a transmission gear 12 is provided on the screw 11 to engage with the upper gear ring 13. The teeth of the upper gear ring 13 are arranged on the upper end surface and mesh with the teeth on the arc-shaped outer wall of the transmission gear 12.

[0026] A toggle groove 9 is provided on the outer wall of the nut body 1, and the rotating rod 6 rotates through the inner bottom wall of the annular cavity 2 and extends into the toggle groove 9. The toggle groove 9 is convenient for two fingers to enter and pinch the rotating rod 6, thereby rotating the rotating rod 6.

[0027] The self-locking plate 15 is L-shaped, and the vertical lengths of the plurality of self-locking plates 15 are designed to be increased. In this way, the four self-locking plates 15 are also distributed in a spiral shape, thereby facilitating the self-locking grooves on the bolts to be distributed in a spiral shape.

[0028] During use, an external force acts on the rotating rod 6 within the toggle slot 9, causing it to rotate. This rotational force drives the driving gear 8. Since the driving gear 8 is connected to the rotating ring 3 via a rotating mechanism, the rotation of the driving gear 8 also drives the rotating ring 3. Subsequently, the rotation of the rotating ring 3 drives the upper ring gear 13, thereby rotating the transmission gear 12, which in turn drives the screw 11. Finally, as the screw 11 rotates, the self-locking plate 15, which is threaded onto the screw 11, moves away from the central notch of the nut body 1 due to the action of the screw 11's threads. When this plate 15 no longer interferes with the installation of the nut body 1, the nut body 1 is installed on a bolt or other component. At this point, the rotating rod 6 is released, and the nut body 1 is rotated to move on the bolt. Once the plate 15 has reached the desired position, it aligns with the self-locking slot. Under the action of the torsion spring 7, the rotating rod 6 rotates back to its original position, and the self-locking plate 15 finally enters the self-locking slot, completing the self-locking installation of the nut body 1.

[0029] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A self-locking square lock nut, comprising a nut body (1), characterized in that: An annular cavity (2) is provided inside the nut body (1), a rotating ring (3) is provided in the annular cavity (2) via a supporting mechanism, a driving gear (8) is provided in the annular cavity (2) via a torsion spring (7), a rotating rod (6) is mounted on the driving gear (8), the driving gear (8) is connected to the rotating ring (3) via a rotating mechanism, a screw rod (11) is provided in the annular cavity (2) via a lifting mechanism, the screw rod (11) is connected to the rotating ring (3) via a transmission mechanism, and a self-locking plate (15) is provided on a threaded sleeve on the screw rod (11) and extends to a central notch of the nut body (1).

2. A self-locking square lock nut according to claim 1, characterized in that: The support mechanism comprises a support ring (4) mounted on a rotating ring (3); an annular groove (5) corresponding to the support ring (4) is provided on the inner bottom wall of the annular cavity (2); and the vertical cross-sections of the support ring (4) and the annular groove (5) are both L-shaped.

3. A self-locking square lock nut according to claim 2, characterized in that: The rotating mechanism comprises a side gear ring (14) mounted on the arc-shaped inner wall of the rotating ring (3), and the side gear ring (14) is meshed with the driving gear (8).

4. A self-locking square lock nut according to claim 3, characterized in that: The transmission mechanism comprises an upper gear ring (13) mounted on the upper end surface of the rotating ring (3); the screw rod (11) is provided with a transmission gear (12) meshing with the upper gear ring (13).

5. A self-locking square lock nut according to claim 4, characterized in that: A toggle groove (9) is provided on the outer wall of the nut body (1), and the rotating rod (6) rotates through the inner bottom wall of the annular cavity (2) and extends into the toggle groove (9).

6. The self-locking square lock nut according to claim 5, characterized in that: The self-locking plate (15) is L-shaped, and the lengths of the vertical parts of the plurality of self-locking plates (15) are designed to be incremental.

Images