Anti-unscrewing threaded connection structure and scissors

Abstract

The utility model relates to the technical field of thread structures, in particular to an anti-unscrewing thread connection structure and scissors, which comprise a nut connected with a connection shaft section; one end of the connecting shaft section is connected with the threaded rod section, and the threaded rod section and the connecting shaft section are coaxially arranged; the anti-unscrewing threaded connection structure further comprises a nut, the nut is suitable for being connected with the threaded rod section in a threaded fit mode, an elastic ring allowing the threaded rod section to be inserted therein is arranged in the nut, and the inner diameter of the elastic ring is smaller than or equal to the diameter of the threaded rod section. Due to the fact that the inner diameter of the elastic ring is smaller than or equal to the diameter of the threaded rod section, the elastic ring exerts an inward extrusion effect on the threaded rod section to prevent the thread from retreating.

Description

Technical Field

[0001] The utility model relates to the technical field of thread structure, in particular to a thread connection structure and a pair of scissors to prevent thread withdrawal. Background Art

[0002] Threaded structures can be seen everywhere in daily work and life, and they mainly serve to connect the two things. Generally speaking, threaded connection structures are relatively stable, and it is difficult for nuts to unthread and fall off on their own; however, when they are subjected to frequent vibrations, such as on equipment that works for a long time; or when they serve as a connection and also as a rotating part, such as scissors, the nuts in the threaded structure will easily unthread and become loose or even fall off, posing potential risks to use. Utility Model Content

[0003] In order to solve the problem that the nut is easy to fall off from the screw rod, the utility model provides a thread-removing prevention thread connection structure and a pair of scissors.

[0004] The technical solution of the utility model is:

[0005] On the one hand, the utility model provides a threaded connection structure for preventing wire withdrawal, characterized in that it includes a nut;

[0006] A connecting shaft section connected to the nut;

[0007] A threaded rod section connected to one end of the connecting shaft section and coaxially arranged with the connecting shaft section;

[0008] A nut, the nut being adapted to be sleeved on the outside of the threaded rod section and to be cooperatively connected therewith;

[0009] Wherein, an elastic ring is arranged in the nut for the threaded rod segment to be inserted, and the inner diameter of the elastic ring is less than or equal to the diameter of the threaded rod segment.

[0010] Furthermore, the radial length of the elastic ring is smaller than the radial length of the nut so that at least a portion of the threaded rod segment is threadedly connected to the nut.

[0011] Furthermore, an annular groove is formed on the inner wall of one end of the nut away from the nut cap, and the elastic ring is arranged in the annular groove.

[0012] Furthermore, the outer end of the annular groove has a limiting portion protruding toward the axis of the annular groove.

[0013] Furthermore, the outer diameter of the elastic ring is greater than or equal to the inner diameter of the nut.

[0014] Furthermore, the anti-thread-backlash thread structure also includes a gasket, and the gasket is suitable for being sleeved on the outer side of the threaded rod segment.

[0015] Furthermore, the connecting shaft section includes a rotating shaft section and a positioning section which are connected to each other, the side surface of the positioning section has a plurality of positioning surfaces, the rotating shaft section is connected to the nut, and the positioning section is connected to the threaded rod section.

[0016] Furthermore, the diameters of the nut, the connecting shaft section, and the threaded rod section decrease in sequence.

[0017] Furthermore, the outer side of the nut is provided with hand-tightening anti-slip grooves and / or rotation grooves.

[0018] According to another aspect of the utility model, a pair of scissors is also provided, characterized in that: it includes the anti-wire backlash threaded connection structure as described above; it also includes a dynamic blade and a static blade, a circular hole is opened on the dynamic blade corresponding to the connecting shaft segment, and a square hole is opened on the static blade corresponding to the connecting shaft segment; the threaded rod segment on the anti-wire backlash threaded structure passes through the circular hole and the square hole in sequence to connect the dynamic blade and the static blade.

[0019] The beneficial effects achieved by the utility model are:

[0020] The utility model discloses a threaded connection structure for preventing thread withdrawal, comprising a nut, on which a connecting shaft section is connected; one end of the connecting shaft section is connected to a threaded rod section, and the threaded rod section and the connecting shaft section are coaxially arranged; the threaded connection structure for preventing thread withdrawal also comprises a nut, which is suitable for threaded cooperation connection with the threaded rod section, and an elastic ring for inserting the threaded rod section is arranged in the nut, and the inner diameter of the elastic ring is less than or equal to the diameter of the threaded rod section. When in use, the threaded rod section is inserted into the elastic ring, and since the inner diameter of the elastic ring is less than or equal to the diameter of the threaded rod section, the elastic ring exerts an inward squeezing effect on the threaded rod section to prevent thread withdrawal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, are used to explain the principles of the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1It is a schematic diagram of the three-dimensional structure of the first embodiment of the present application;

[0025] Figure 2 is a sectional view of the main view of the first embodiment of the present application;

[0026] Figure 3 It is a partial structural schematic diagram of a nut according to Embodiment 1 of the present application;

[0027] Figure 4 It is a schematic diagram of the exploded structure of the nut of Example 1 of the present application.

[0028] In the figure,

[0029] 100, nut; 200, connecting shaft section; 300, threaded rod section; 400, nut; 500, elastic ring; 600, gasket; 210, rotating shaft section; 220, positioning section; 221, positioning surface; 410, annular groove; 420, hand-tightening anti-slip groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0031] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0032] For ease of description, spatial relative terms may be used in the text to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below ······" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0033] Embodiment 1

[0034] The embodiment of the present application shows an anti-thread backlash threaded connection structure, including a nut 100, to which a connecting shaft segment 200 is connected; one end of the connecting shaft segment 200 is connected to a threaded rod segment 300, and the threaded rod segment 300 is coaxially arranged with the connecting shaft segment 200; the anti-thread backlash threaded connection structure also includes a nut 400, the nut 400 is suitable for (meaning can, can) threadedly matched connection with the threaded rod segment 300, and an elastic ring 500 for inserting the threaded rod segment 300 is arranged in the nut 400, and the inner diameter of the elastic ring 500 is less than or equal to the diameter of the threaded rod segment 300. When in use, the threaded rod segment 300 is inserted into the elastic ring 500. Since the inner diameter of the elastic ring 500 is less than or equal to the diameter of the threaded rod segment 300, the elastic ring 500 exerts an inward squeezing effect on the threaded rod segment 300 to prevent thread backlash.

[0035] Optionally, the inner diameter of the elastic ring 500 is smaller than the diameter of the threaded rod segment 300 , so that the elastic ring 500 can provide sufficient extrusion force to the threaded rod segment 300 .

[0036] In an optional embodiment, the elastic ring 500 may not be a full circle, for example, one or more arcs are arranged around the threaded rod segment 300, or are arranged at different positions along the length direction of the threaded rod segment 300, as long as it can play the role of pressing the threaded rod segment 300 inward to prevent it from debonding; optionally, the elastic ring 500 may be a silicone ring, a rubber ring, etc.

[0037] Furthermore, the connection relationship between the elastic ring 500 and the nut 400 can be an interference fit, adhesive connection, snap-on connection, etc.; preferably, the connection relationship between the elastic ring 500 and the nut 400 can be an interference fit, that is, the outer diameter of the elastic ring 500 is greater than or equal to the inner diameter of the nut 400, so that when the elastic ring 500 is placed in the nut 400, the elastic ring 500 itself is fixed in the nut 400 due to the outward elastic deformation tendency of the elastic ring 500; this connection method is simple to assemble and has a low production cost, and is suitable for mass production; further, the outer diameter of the elastic ring 500 is greater than the inner diameter of the nut 400, so that the connection is more stable when the elastic ring 500 is snapped into the nut 400.

[0038] In an optional embodiment, the anti-thread backlash thread structure also includes a gasket 600, which is suitable for being sleeved on the outer side of the threaded rod segment 300; when in use, the gasket 600 is arranged on the side of the nut 400 facing the nut 100; the gasket 600 can be a rubber pad, a silicone pad, a metal gasket, etc.; preferably, it is a soft gasket, such as a rubber pad or a silicone pad.

[0039] In an optional embodiment, the radial length of the elastic ring 500 is smaller than the radial length of the nut 400 so that at least a portion of the threaded rod segment 300 is threadedly connected to the nut 400 .

[0040] In an optional embodiment, an annular groove 410 is provided on the inner wall of one end of the nut 400 away from the nut 100, and the elastic ring 500 is arranged in the annular groove 410. The separately provided annular groove 410 facilitates the placement of the elastic ring 500 and also enables the elastic ring 500 to have a better inward extrusion force. Optionally, the inner wall of the annular groove 410 is a smooth surface rather than a threaded structure, so that the elastic ring 500 can be smoothly inserted and the connection between the elastic ring 500 and the annular groove 410 is more stable.

[0041] Optionally, the outer end of the annular groove 410 has a limiting portion protruding toward the axis of the annular groove 410, and the limiting portion can prevent the elastic ring 500 arranged in the annular groove 410 from escaping; the limiting portion can be an annular protrusion to play a good limiting role for the elastic ring 500; the limiting portion can also be a multi-segment protrusion, and the multi-segment protrusion is preferably arc-shaped.

[0042] In an optional embodiment, the inner wall of the nut 400 has a smooth curved surface at one end, and the elastic ring 500 is arranged corresponding to the position of the smooth curved surface; the raised threads on both sides of the smooth curved surface can play a certain limiting role on the elastic ring 500.

[0043] In an optional embodiment, the connecting shaft section 200 includes a rotating shaft section 210 and a positioning section 220 connected to each other, the positioning section 220 has a plurality of positioning surfaces 221, the rotating shaft section 210 is connected to the nut 100, and the positioning section 220 is connected to the threaded rod section 300; when the embodiment of the present application is used in scissors, the scissors are divided into a moving blade and a stationary blade, the circular hole on the moving blade passes through the rotating shaft section 210 for rotation; the stationary blade is provided with a polygonal hole corresponding to the positioning section 220; optionally, as Figure 1 As shown, the positioning section 220 is a cylindrical section, and the positioning surface 221 is a sunken groove opened on the positioning section 220, with an arc transition between every two sunken grooves; the number of sunken grooves is preferably four, and it is understandable that the number of sunken grooves can also be two, three, five or even more.

[0044] In an optional implementation, there is no arcuate transition between the two sinking grooves, and the positioning section 220 is equivalent to a positioning block with a polygonal cross-section; the polygon is preferably a rectangle, which is simple to manufacture and has high versatility.

[0045] In an optional embodiment, the diameters of the nut 100, the connecting shaft segment 200, and the threaded rod segment 300 are reduced in sequence to facilitate the connection of multiple designated objects.

[0046] In an optional embodiment, the outer side of the nut 400 is provided with hand-tightening anti-slip grooves 420 and / or rotation grooves; optionally, a circle of hand-tightening anti-slip grooves 420 is provided on the outer side of the nut 400, so that the user can disassemble the nut 400 without the aid of tools; a rotation groove can also be selectively provided on the nut 400 so that the nut 400 can be installed and disassembled by tools.

[0047] Embodiment 2

[0048] An embodiment of the present application shows a pair of scissors, including the anti-wire backflow threaded connection structure as described above; also including a moving blade and a stationary blade, a round hole is opened on the moving blade corresponding to the connecting shaft segment 200, and a square hole is opened on the stationary blade corresponding to the connecting shaft segment 200; the threaded rod segment 300 on the anti-wire backflow threaded structure passes through the round hole and the square hole in sequence to connect the moving blade and the stationary blade.

[0049] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0050] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0051] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. Anti-thread-retraction thread connection structure, characterized by: include Nut (100); A connecting shaft section (200) connected to the nut (100); A threaded rod section (300) connected to one end of the connecting shaft section (200) and coaxially arranged with the connecting shaft section (200); A nut (400), wherein the nut (400) is adapted to be sleeved on the outside of the threaded rod section (300) and be cooperatively connected therewith; Wherein, an elastic ring (500) is arranged inside the nut (400) for the threaded rod segment (300) to be inserted, and the inner diameter of the elastic ring (500) is smaller than or equal to the diameter of the threaded rod segment (300).

2. The anti-thread-backlash thread connection structure according to claim 1, characterized in that: The radial length of the elastic ring (500) is smaller than the radial length of the nut (400) so that at least a portion of the threaded rod section (300) is threadedly connected to the nut (400).

3. The anti-thread-backlash thread connection structure according to claim 2, characterized in that: An annular groove (410) is formed on the inner wall of one end of the nut (400) away from the nut (100), and the elastic ring (500) is arranged in the annular groove (410).

4. The anti-thread-backlash thread connection structure according to claim 3, characterized in that: The outer end of the annular groove (410) has a limiting portion protruding toward the axis of the annular groove (410).

5. The anti-thread-backlash thread connection structure according to claim 1, characterized in that: The outer diameter of the elastic ring (500) is greater than or equal to the inner diameter of the nut (400).

6. The anti-thread-backlash thread connection structure according to claim 1, characterized in that: The anti-thread backlash thread structure further comprises a gasket (600), and the gasket (600) is suitable for being sleeved on the outside of the threaded rod segment (300).

7. The anti-thread-backlash thread connection structure according to any one of claims 1 to 6, characterized in that: The connecting shaft section (200) comprises a rotating shaft section (210) and a positioning section (220) which are connected to each other. The side surface of the positioning section (220) has a plurality of positioning surfaces (221). The rotating shaft section (210) is connected to the nut (100), and the positioning section (220) is connected to the threaded rod section (300).

8. The anti-thread-backlash thread connection structure according to claim 7, characterized in that: The diameters of the nut (100), the connecting shaft section (200), and the threaded rod section (300) decrease in sequence.

9. The anti-thread-backlash thread connection structure according to any one of claims 1 to 6, characterized in that: The outer side of the nut (400) is provided with hand-tightening anti-slip grooves (420) and / or rotation grooves.

10. Scissors, comprising the anti-wire backlash threaded connection structure as described in any one of claims 1 to 9; further comprising a dynamic blade and a static blade, wherein a circular hole is provided on the dynamic blade corresponding to the connecting shaft segment (200), and a square hole is provided on the static blade corresponding to the connecting shaft segment (200); the threaded rod segment (300) on the anti-wire backlash threaded structure passes through the circular hole and the square hole in sequence to connect the dynamic blade and the static blade.

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