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] This invention belongs to the field of thread tightening technology, and in particular relates to a thread fastening device. Background Technology

[0002] Threaded connections are detachable fixed connections widely used in various mechanical equipment, serving functions such as fixing, transmission, positioning, and sealing. The quality of threaded connections plays a crucial role in product reliability, and one important indicator is thread tightness, which includes tightening technology and anti-loosening technology.

[0003] In the field of optical imaging, threaded connections are commonly used for focusing and fixing optical lenses. To ensure product imaging quality, high-quality threaded connections are required to ensure that the mounting height, perpendicularity, and concentricity of the optical lens meet the standards. Optical lenses generally use relatively precise ultra-fine threads. The main factor determining the thread tightening effect is the thread fit tolerance, followed by the properties of the thread material and the thread tightening process.

[0004] Among threads of the same specification, due to differences in machining parameters and material properties, as well as factors such as equipment aging, tool wear, and mold corrosion, it is difficult to control the consistency of thread dimensions. This results in inconsistent and unstable tightening torque generated by each group of parts during thread tightening. This is especially problematic for small optical lenses, which can easily lead to difficulties in installation or loosening.

[0005] The existing conventional solutions are to reselect parts or to customize parts with specific tolerances from the manufacturer. Both solutions further contribute to the confusion surrounding thread tolerance standards in the market, exacerbating problems such as cumbersome procurement, inventory buildup, and frequent inspection disputes. Summary of the Invention

[0006] To address the issue of low assembly compatibility of threaded fastening devices, this invention provides a highly compatible threaded fastening device.

[0007] The technical solution adopted in this invention is as follows: a highly compatible threaded fastening device includes: a threaded plug body, the threaded plug body having an external thread; a threaded ring body, the threaded ring body having an internal thread, the internal thread being engaged with the external thread; and a protrusion provided on the tooth flank of the external thread and / or the internal thread.

[0008] In the aforementioned highly compatible threaded fastening device, the protrusion of the internal thread / external thread is interference-fitted with the tooth flank of the external thread / internal thread.

[0009] The beneficial effects of this invention are: it enables the characteristic pitch diameter of the thread to be adaptive, realizing universal thread matching; it enables interference fit on the thread flank, improving the thread tightening quality; and it reduces the dispersion of tightening torque, facilitating production and management. Attached Figure Description

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

[0011] Figure 2 for Figure 1 A magnified view of part A in the middle;

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

[0013] Figure 4 This is a cross-sectional view of an exploded view of Embodiment 1 of the present invention;

[0014] Figure 5 for Figure 4 A magnified view of part B in the middle section;

[0015] Figure 6 for Figure 4 A magnified view of part C in the middle.

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

[0017] Explanation of the symbols in the attached diagram: 10-threaded plug, 11-external thread, 20-threaded ring, 21-internal thread, 30-protrusion. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0020] It should be understood that the terms "and / or" and "and / or" used in this article are merely descriptions of the relationships between related objects, indicating that three relationships can exist. For example, A1 and / or B1 can represent: A1 existing alone, A1 and B1 existing simultaneously, and B1 existing alone. Furthermore, the appearance of the character " / " twice within a sentence generally indicates that the related objects on the same side of the character have a "correspondence" relationship.

[0021] like Figure 1 , Figure 2As shown, this device is a highly compatible threaded fastening device. It includes a threaded plug body 10 and a threaded ring body 20. The threaded plug body has an external thread 11, and the threaded ring body has an internal thread 21. The internal thread and the external thread are connected in a mating manner. The external thread and / or the internal thread have a protrusion 30 on the tooth flank. The protrusion of the internal thread / external thread is interference-fitted with the tooth flank of the external thread / internal thread.

[0022]

Example 1

[0023] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the highly compatible threaded fastening device includes: a threaded plug 10, specifically a lens, and a threaded ring 20, specifically a lens mount. The lens has an external thread 11, and the lens mount has an internal thread 21, which mates with the external thread. The pitch diameter of the internal thread has a certain positive downward deviation, and the flank of the internal thread has a protrusion 30, which is evenly distributed along the two spiral turns. The lens and lens mount are connected by threads. First, the threads are tightened, and the protrusion of the internal thread and the flank of the external thread are interference-fitted. After focusing, adhesive is applied for fixation.

[0024] The working principle of this embodiment:

[0025] The internal thread has a larger pitch diameter, which facilitates the screwing of the threaded plug and enhances its adaptability to threaded plugs with larger thread sizes. The interference fit between the internal thread's protrusion and the external thread's flank increases the influence of the thread's pitch diameter, reduces the quality requirements for the thread crest and root, and ensures that the flank of the external thread closest to the injection window is fully contacted and stressed, improving the thread tightening quality. The plastic deformation after the protrusion's interference fit gives the thread's characteristic pitch diameter self-adaptability, enabling universal thread compatibility and reducing the dispersion of tightening torque, thus facilitating production and management. The elastic deformation after the protrusion's interference fit ensures that the thread tightening has a certain tightening torque, facilitating the positioning of the threaded plug.

[0026]

Example 2

[0027] like Figure 7 As shown, a protrusion can be provided on the flank of the external thread. When tightening the thread, the tightening torque is initially small and gradually increases, making assembly convenient and preventing dust from falling off; the protrusion is located on the external thread, simplifying the manufacturing process.

[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 skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions 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 threaded fastening device, comprising a threaded plug and a threaded ring, characterized in that: The threaded plug body is provided with external threads; The threaded ring body is provided with an internal thread, which is engaged with the external thread for connection; The external thread and / or the internal thread are provided with protrusions on the tooth sides.

2. The highly compatible threaded fastening device according to claim 1, characterized in that: The protrusion of the internal thread / external thread is interference-fitted with the tooth flank of the external thread / internal thread.

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