High-compatibility thread fastening device

Abstract

The high-compatibility thread fastening device comprises a thread plug body and a thread ring body, the thread plug body is provided with an external thread, the thread ring body is provided with an internal thread, the internal thread is connected with the external thread in a matched mode, a protruding block is arranged on the tooth side of the external thread and / or the tooth side of the internal thread, and the protruding block of the internal thread / external thread is in interference fit with the tooth side of the external thread / internal thread. Through plastic deformation after the bumps are in interference fit, the characteristic pitch diameter of the thread has self-adaptability, and the dispersion degree of tightening torque is reduced; through elastic deformation of the convex blocks after interference fit, it is guaranteed that certain tightening torque is achieved during thread tightening. The universal matching of threads is realized, the screwing quality of the threads is improved, the production and management cost is reduced, and the market space is enlarged.

Description

Technical Field

[0001] The invention belongs to the technical field of thread tightening, and in particular relates to a thread fastening device. Background Art

[0002] Threaded connections are a type of removable, fixed connection widely used in various types of mechanical equipment, serving various functions, including fixing, transmission, positioning, and sealing. The quality of threaded connections plays a key role in product reliability, with thread tightening being a key indicator, encompassing both tightening and anti-loosening techniques.

[0003] In the field of optical imaging, threaded connections are often used to set focus and secure optical lenses. To ensure image quality, high-quality threaded connections are required to ensure that the installation height, verticality, and concentricity of the optical lens meet standards. Optical lenses generally utilize relatively precise, ultra-fine threads. The primary factor determining thread tightening performance is thread tolerance, followed by thread material properties and the tightening process.

[0004] Due to differences in processing parameters and material properties, as well as factors such as equipment aging, tool wear, and mold corrosion, thread size consistency is difficult to control between threads of the same specification. This results in uneven and unstable tightening torque for each component during thread tightening. This is particularly true for small optical lenses, which can easily lead to difficulty in installation or loosening.

[0005] The conventional solution is to re-select parts or request custom tolerances from manufacturers. Both solutions further create confusion in thread tolerance standards in the market, exacerbating issues such as cumbersome procurement, inventory accumulation, and frequent inspection disputes. Summary of the Invention

[0006] In order to solve the problem of low assembly compatibility of threaded fastening devices, the present invention provides a threaded fastening device with high compatibility.

[0007] The technical solution adopted by the present invention is: a highly compatible threaded fastening device includes: a threaded plug body, which is provided with an external thread; a threaded ring body, which is provided with an internal thread, and the internal thread is matched and connected with the external thread; and a protrusion is provided on the tooth side of the external thread and / or the internal thread.

[0008] In the above-mentioned high-compatibility thread fastening device, the protrusion of the internal thread / the external thread is interference-fitted with the tooth flanks of the external thread / the internal thread.

[0009] The beneficial effects of the present invention are: making the characteristic mean diameter of the thread adaptive to achieve universal matching of the thread; making the thread flanks interference fit to improve the thread tightening quality; reducing the discrete degree of the tightening torque to facilitate production and management. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the structural diagram of the device of the present invention;

[0011] Figure 2 is Figure 1 the partial enlarged view of part A in;

[0012] Figure 3 This is the schematic diagram of Embodiment 1 of the present invention;

[0013] Figure 4 This is the sectional view of the explosion diagram of Embodiment 1 of the present invention;

[0014] Figure 5 is Figure 4 the partial enlarged view of part B in;

[0015] Figure 6 is Figure 4 the partial enlarged view of part C in.

[0016] Figure 7 This is the schematic diagram of Embodiment 2 of the present invention;

[0017] Explanation of the attached drawing reference numerals: 10 - threaded plug body, 11 - external thread, 20 - threaded ring body, 21 - internal thread, 30 - convex block. Detailed implementation manners

[0018] Next, the technical solutions in the present invention will be clearly described in conjunction with the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

[0020] It should be understood that the term "and / or" used herein is only a relationship describing the associated objects, indicating that three relationships may exist. For example, A1 and / or B1 may represent: A1 exists alone, A1 and B1 exist simultaneously, and B1 exists alone. In addition, when the character " / " appears twice in a sentence herein, generally, the associated objects on the same side of the character are in a "corresponding" relationship.

[0021] Such as Figure 1 、 Figure 2As shown in the figure, the present device is a highly compatible thread fastening device, which includes a thread plug body 10 and a thread ring body 20. The thread plug body is provided with an external thread 11, and the thread ring body is provided with an internal thread 21. The internal thread is in mating connection with the external thread. A convex block 30 is provided at the flank of the external thread and / or the internal thread; the convex block of the internal thread / the external thread is in interference fit with the flank of the external thread / the internal thread.

[0022]

Embodiment 1

[0023] As Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown in the figure, the highly compatible thread fastening device includes: the thread plug body 10 is specifically a lens, and the thread ring body 20 is specifically a lens mount. The lens is provided with an external thread 11, and the lens mount is provided with an internal thread 21. The internal thread is in mating connection with the external thread. The middle diameter dimension of the internal thread is provided with a certain positive deviation, and a convex block 30 is provided at the flank of the internal thread. The convex blocks are evenly distributed on two spiral lines. When the lens and the lens mount are thread-connected, first the thread is tightened, and the convex block of the internal thread is in interference fit with the flank of the external thread. After focusing, glue is applied for fixation.

[0024] The working principle of this embodiment:

[0025] The designed dimension of the middle diameter of the internal thread is larger, which is convenient for guiding the thread plug body to be screwed in and strengthens the adaptability to the thread plug body with a larger thread dimension; the convex block of the internal thread is in interference fit with the flank of the external thread, which improves the influence of the middle diameter dimension of the thread, reduces the quality requirements for the thread crest and thread root, and at the same time makes the flank of the external thread on the side close to the incident window fully contact and bear force, improving the thread tightening quality; the plastic deformation after the interference fit of the convex block makes the characteristic middle diameter of the thread have self - adaptability, realizes the thread compatibility, and reduces the dispersion degree of the tightening torque, which is convenient for production and management; the elastic deformation after the interference fit of the convex block ensures that the thread tightening has a certain tightening torque and is convenient for positioning the thread plug body.

[0026]

Embodiment 2

[0027] As Figure 7 As shown in the figure, convex blocks can be provided at the flank of the external thread. When the thread is tightened, the tightening torque is small first and then large, which is convenient for assembly and not easy to drop dust; the convex blocks are provided on the external thread, and the manufacturing process is simple.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A highly compatible thread fastening device, comprising a thread plug body and a thread ring body, characterized in that: The thread plug body is provided with an external thread; The thread ring body is provided with an internal thread, and the internal thread is in mating connection with the external thread; Protrusions are provided at the flank of the external thread and / or the internal thread.

2. The highly compatible thread fastening device according to claim 1, characterized in that: The protrusions of the internal thread / the external thread are in interference fit with the flank of the external thread / the internal thread.

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