Precise screw locking locknut

Abstract

The utility model discloses a precision screw locking locknut, which comprises a screw and a nut, the screw is in threaded connection with the nut, the top end of the nut is respectively provided with a first connecting ring and a second connecting ring, the first connecting ring is fixedly connected with the top end of the nut, and the second connecting ring is fixedly connected with the top end of the nut. An adjusting assembly for adjusting the height of the second connecting ring is arranged on the second connecting ring, the second connecting ring is connected with the first connecting ring through the adjusting assembly, grooves are formed in the inner wall of the first connecting ring and the inner wall of the second connecting ring correspondingly, and arc-shaped clamping rings are slidably installed in the grooves; second springs are arranged in the arc-shaped clamping rings and the grooves. According to the anti-loosening nut, the anti-loosening effect can be achieved by limiting the threads through the arc-shaped clamping ring without operating the nut, and the first connecting ring and the second connecting ring occupy small space and cannot affect use of the nut.

Description

Technical Field

[0001] The utility model relates to the technical field of precision screw rods, in particular to a precision screw rod locking anti-loosening nut. Background Art

[0002] As a core component in the modern machinery manufacturing industry, precision screws have a profound and evolving technical background. They are widely used in various high-precision mechanical devices, such as CNC machine tools, injection molding machines, semiconductor equipment, and precision measuring instruments, playing a key role in transmitting power, positioning control, and precision adjustment. The design and manufacturing level of precision screws directly affects the operating accuracy, stability, and service life of the entire mechanical system. With the advancement of science and technology, especially the rapid development of materials science, precision machining technology, and computer-aided design, the manufacturing technology of precision screws has also made significant breakthroughs.

[0003] In the application of precision screws, anti-loosening nuts, as an important supporting component, also play a vital role. The main function of anti-loosening nuts is to ensure that the screw will not loosen when subjected to vibration or external force, thereby maintaining the stability and safety of the mechanical system. Traditional nuts are prone to loosening in a vibrating environment, which may cause mechanical failure or accidents. Anti-loosening nuts use special designs and materials, such as self-locking structures and preload control, which effectively prevent the nuts from loosening. Used in conjunction with precision screws, anti-loosening nuts can further improve the reliability and service life of the mechanical system, ensuring that the equipment maintains high precision and stability during long-term operation. Therefore, in the design and manufacturing of precision machinery, the use of precision screws and anti-loosening nuts has become an industry standard and best practice.

[0004] Patent document CN117307585A discloses a locking nut, including a nut member, the nut member is threadedly arranged on a screw rod, a plurality of elastic members form a group, the nut member is pressed on a group of elastic members, the elastic members are passed through by the screw rod, the elastic members include an arc-shaped body, one end of the bottom surface of the arc-shaped body has an insertion groove, the other end of the bottom surface has an elastic insertion part, the elastic insertion part of one arc-shaped body is used to be inserted into the insertion groove of another adjacent arc-shaped body, the arc-shaped bodies of the plurality of elastic members are sequentially plugged into a circular ring body surrounded by a circular ring, and the elastic support part is arranged at the lower part of the arc-shaped body. Through the above technical solution, the technical problem of poor locking nut effect in the prior art is solved.

[0005] As in the prior art of the above patent, the fastening method of the above-mentioned anti-loosening nut is achieved by installing an elastic connector, which is intended to increase the pressure between the nut and the screw to achieve the effect of fastening. However, this fastening method has two obvious disadvantages. First, the size of the elastic support part of the elastic connector extending outward is large, which not only affects the normal use of the nut, but also may cause inconvenience in practical applications. More importantly, since the elastic connection assembly adopts a disassembly split design, the installation and disassembly process is relatively troublesome. The elastic connector needs to be inserted from one end of the screw and then installed on the screw with the nut, which undoubtedly increases the complexity and time cost of the operation. Secondly, although the outer conical surface set at one end of the nut can be squeezed by the elastic support, the pressure between the nut and the screw can be increased to achieve the fastening function, this method also brings a problem, that is, it is easy to cause pressure imbalance between the nut and the screw. This pressure imbalance may cause unnecessary wear between the inner thread of the nut and the screw, thereby affecting the stability and service life of the connection. Utility Model Content

[0006] The utility model aims to provide a precision screw locking anti-loosening nut to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a precision screw locking anti-loosening nut, comprising a screw and a nut, the screw is threadedly connected to the nut, the top of the nut is respectively provided with a first connecting ring and a second connecting ring, the first connecting ring is fixedly connected to the top of the nut, the second connecting ring is provided with an adjusting component for adjusting the height of the second connecting ring, the second connecting ring is connected to the first connecting ring through the adjusting component, the inner walls of the first connecting ring and the second connecting ring are both provided with grooves, the interior of the groove is slidably installed with an arc-shaped retaining ring, and a second spring is provided inside the arc-shaped retaining ring and the groove.

[0008] As a further description of the above technical solution: the side wall of the arc-shaped clamping ring is provided with two inclined surfaces, and the two inclined surfaces are an upper inclined surface and a lower inclined surface respectively.

[0009] As a further description of the above technical solution: the adjustment assembly includes two bolts and a connecting plate, the two connecting plates are respectively fixed on two sections of one of the arc-shaped retaining rings, the two bolts are rotatably installed on the top of the first connecting ring, and the two bolts are threadedly connected to the two connecting plates.

[0010] As a further description of the above technical solution: a sliding rod is fixedly installed on the top of the nut, and two of the sliding rods pass through the second connecting ring and are slidably connected to the second connecting ring.

[0011] As a further description of the above technical solution: a first spring is provided on the side wall of the slide rod, the bottom end of the first spring is fixedly connected to the top end of the nut, and the top end of the first spring is fixedly connected to the bottom end of the second connecting ring.

[0012] As a further description of the above technical solution: the two inclined surfaces are provided with rubber layers.

[0013] The utility model provides a precision screw locking anti-loosening nut. It has the following beneficial effects: during the movement of the screw nut of the utility model, when two arc-shaped snap rings contact the non-threaded part on the screw, the sliding surface of the screw squeezes the arc-shaped snap ring, so that the arc-shaped snap ring squeezes the second spring inwardly, and when the two arc-shaped snap rings move to the threaded part on the screw, under the action of the spring, the two arc-shaped snap rings are ejected outwardly, and the two arc-shaped snap rings are clamped into the inside of the thread groove. Since the threads of the screw on the same horizontal plane are not on the same horizontal plane, the height of the second connecting ring can be adjusted by adjusting the assembly, so that the arc-shaped snap rings on both sides can be clamped into the inside of the thread groove, and the nut itself is not operated. The thread is limited by the arc-shaped snap ring to achieve the anti-loosening effect, and the space occupied by the first connecting ring and the second connecting ring is small, which will not affect the use of the nut.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0015] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a precision screw locking anti-loosening nut proposed by the utility model;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the nut body of the utility model;

[0018] Figure 3 It is a schematic diagram of a three-dimensional explosion structure between the first connecting ring, the second connecting ring and the arc-shaped clamping ring of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the arc-shaped clamping ring of the utility model;

[0020] Figure 5 It is a schematic cross-sectional structure diagram of two arc-shaped clamping rings of the utility model respectively clamped into the screw threads.

[0021] Legend:

[0022] 1. Screw rod; 3. Nut; 4. First connecting ring; 5. Second connecting ring; 6. Bolt; 7. Connecting plate; 8. Sliding rod; 9. First spring; 10. Arc-shaped clamping ring; 11. Groove; 12. Second spring; 13. Inclined surface; 14. Rubber layer. DETAILED DESCRIPTION

[0023] 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 of the embodiments.

[0024] Reference Figure 1-5 A precision screw locking anti-loosening nut, comprising a screw 1 and a nut 3, wherein the screw 1 is threadedly connected to the nut 3, and the top of the nut 3 is respectively provided with a first connecting ring 4 and a second connecting ring 5, wherein the first connecting ring 4 is fixedly connected to the top of the nut 3, and the second connecting ring 5 is provided with an adjusting component for adjusting the height of the second connecting ring 5, and the second connecting ring 5 is connected to the first connecting ring 4 through the adjusting component, and the inner walls of the first connecting ring 4 and the second connecting ring 5 are both provided with a groove 11, and an arc-shaped snap ring 10 is slidably installed inside the groove 11, and a second spring 12 is arranged inside the arc-shaped snap ring 10 and the groove 11; when the nut 3 moves on the screw 1, the arc-shaped snap ring 10 on the first connecting ring 4 and the second connecting ring 5 can continuously snap into the screw Inside the thread on the rod 1, when the screw 1 and the nut 3 move, when the two arc-shaped snap rings 10 come into contact with the non-thread on the screw 1, the sliding surface of the screw 1 squeezes the arc-shaped snap ring 10, so that the arc-shaped snap ring 10 squeezes the second spring 12 inwardly. When the two arc-shaped snap rings 10 move to the thread on the screw 1, the two arc-shaped snap rings 10 are ejected outwardly by the action of the spring, and the two arc-shaped snap rings 10 are stuck in the inside of the thread groove. Since the threads of the screw 1 on the same horizontal plane are not on the same horizontal plane, the height of the second connecting ring 5 can be adjusted by adjusting the component, so that the arc-shaped snap rings 10 on both sides can be stuck in the inside of the thread groove, thereby achieving the effect of preventing loosening by limiting the thread through the arc-shaped snap ring 10 without operating the nut 3 itself.

[0025] As a preferred technical solution of this embodiment, the side wall of the arc-shaped snap ring 10 is provided with two inclined surfaces 13, and the two inclined surfaces 13 are respectively an upper inclined surface 13 and a lower inclined surface 13; the setting of the inclined surface 13 can facilitate the arc-shaped snap ring 10 to be smoothly inserted into the interior of the thread groove, and the inclined surface 13 is divided into an upper inclined surface 13 and a lower inclined surface 13, that is, when the nut 3 moves in both directions, the arc-shaped snap ring 10 can be conveniently inserted into the interior of the thread groove.

[0026] As a preferred technical solution of this embodiment, the adjustment assembly includes two bolts 6 and a connecting plate 7. The two connecting plates 7 are respectively fixed on two sections of one of the arc-shaped retaining rings 10. The two bolts 6 are rotatably installed on the top of the first connecting ring 4. The two bolts 6 are threadedly connected to the two connecting plates 7. By rotating the bolts 6, the height of the second connecting ring 5 can be changed.

[0027] As a preferred technical solution of this embodiment, a sliding rod 8 is fixedly installed on the top of the nut 3, and the two sliding rods 8 pass through the second connecting ring 5 and are slidably connected to the second connecting ring 5; the setting of the sliding rod 8 can increase the stability of the lifting and lowering of the second connecting ring 5.

[0028] As a preferred technical solution of this embodiment, a first spring 9 is provided on the side wall of the slide rod 8, the bottom end of the first spring 9 is fixedly connected to the top end of the nut 3, and the top end of the first spring 9 is fixedly connected to the bottom end of the second connecting ring 5; the function of the first spring 9 can make the second connecting ring 5 more stable at the corresponding height, prevent the second connecting ring 5 from loosening, thereby affecting the tightening effect.

[0029] As a preferred technical solution of this embodiment, the two inclined surfaces 13 are provided with a rubber layer 14; the rubber layer 14 is relatively soft and can prevent wear between the arc-shaped clamping ring 10 and the thread, thereby increasing the protective effect of the device.

[0030] 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. A precision screw locking nut, comprising a screw (1) and a nut (3), wherein the screw (1) and the nut (3) are threadedly connected, characterized in that: The top of the nut (3) is respectively provided with a first connecting ring (4) and a second connecting ring (5), the first connecting ring (4) is fixedly connected to the top of the nut (3), the second connecting ring (5) is provided with an adjusting component for adjusting the height of the second connecting ring (5), the second connecting ring (5) is connected to the first connecting ring (4) through the adjusting component, the inner walls of the first connecting ring (4) and the second connecting ring (5) are both provided with a groove (11), the interior of the groove (11) is slidably installed with an arc-shaped retaining ring (10), and the arc-shaped retaining ring (10) and the groove (11) are provided with a second spring (12).

2. A precision screw locking nut according to claim 1, characterized in that: The side wall of the arc-shaped clamping ring (10) is provided with two inclined surfaces (13), and the two inclined surfaces (13) are respectively an upper inclined surface (13) and a lower inclined surface (13).

3. The precision screw locking nut according to claim 1, characterized in that: The adjustment assembly comprises two bolts (6) and a connecting plate (7). The two connecting plates (7) are respectively fixed to two sections of one of the arc-shaped clamping rings (10). The two bolts (6) are rotatably mounted on the top of the first connecting ring (4). The two bolts (6) are threadedly connected to the two connecting plates (7).

4. The precision screw locking nut according to claim 1, characterized in that: A sliding rod (8) is fixedly mounted on the top end of the nut (3), and two of the sliding rods (8) penetrate the second connecting ring (5) and are slidably connected to the second connecting ring (5).

5. A precision screw locking nut according to claim 4, characterized in that: A first spring (9) is provided on the side wall of the slide rod (8), the bottom end of the first spring (9) is fixedly connected to the top end of the nut (3), and the top end of the first spring (9) is fixedly connected to the bottom end of the second connecting ring (5).

6. A precision screw locking nut according to claim 2, characterized in that: The two inclined surfaces (13) are provided with rubber layers (14).

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