Combined anti-loose and anti-uninstall nut

Abstract

The utility model relates to fastener technical field, especially a combined type anti -loose anti -uninstall nut, including eccentric nut and compression nut, eccentric nut and compression nut are equipped with each other's adaptation truncated cone and truncated cone cavity respectively, truncated cone fixedly connected in eccentric nut, and is equipped with the notch on the truncated cone, the utility model discloses the slit still is equipped with between truncated cone and eccentric nut, and the connection of truncated cone and eccentric nut is the starting point along with the extension of truncated cone until the notch place of rising, when the truncated cone enters the truncated cone cavity, and the truncated cone cavity is gathered to the axis of eccentric nut through the cavity wall extrusion truncated cone, the utility model discloses the truncated cone through the separation of truncated cone makes in compression nut and eccentric nut assembly, and the truncated cone can hold tightly the bolt, to improve the anti -loose effect.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a combined anti-loosening and anti-disassembly nut. Background Technology

[0002] Combination anti-loosening and anti-disconnection nuts (hereinafter referred to as combination nuts) are one of the most widely used fasteners. They consist of two nuts that work with the same bolt to achieve better anti-loosening and anti-disconnection capabilities.

[0003] As described in the prior art of an anti-loosening nut disclosed in the authorization announcement number CN206072085U, the combination nut consists of a convex nut (also called an eccentric nut) and a concave nut (also called a clamping nut). During the fitting process, the convex nut and the concave nut are assembled and used with the bolt in sequence.

[0004] Currently, compared to single nuts, combination nuts have significantly improved their anti-loosening and anti-disassembly effects, but there is still room for improvement.

[0005] Therefore, this utility model improves upon existing combined nuts to achieve a better anti-loosening effect. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a combined anti-loosening and anti-disassembly nut, which aims to solve the problems mentioned in the background technology.

[0007] The technical solution of this utility model is as follows: a combined anti-loosening and anti-discharge nut, including an eccentric nut and a clamping nut, wherein the eccentric nut and the clamping nut are respectively provided with mutually compatible truncated cones and truncated cone cavities, the truncated cones are fixedly connected to the eccentric nut, and a notch is provided on the truncated cones;

[0008] There is also a gap between the truncated cone and the eccentric nut. The gap extends along the truncated cone from the connection between the truncated cone and the eccentric nut to the notch.

[0009] When the truncated cone enters the truncated cone cavity, the cavity wall compresses the truncated cone and brings it closer to the axis of the eccentric nut.

[0010] Preferably, the truncated cone and the eccentric nut are integrally formed.

[0011] Preferably, both the eccentric nut and the clamping nut are anti-theft nuts.

[0012] By adopting the above technical solution:

[0013] This invention adds a gap between the truncated cone and the eccentric nut, based on the original eccentric nut. In the existing eccentric nut, the truncated cone is fixed to the eccentric nut (the conventional method is to integrally form the truncated cone with the eccentric nut). However, this invention cuts the existing truncated cone by first creating a notch in the truncated cone, and then cutting along the connection position between the truncated cone and the eccentric nut through the notch to form a gap, leaving a portion of the truncated cone connected to the eccentric nut.

[0014] The cone cavity of the existing clamping nut is slightly smaller than that of the bolt. Therefore, when the eccentric nut and the clamping nut are used in combination, after the cone enters the cone cavity, the cone will converge towards the axis, so that the internal thread of the cone fits more tightly with the bolt (similar to the cone gripping the bolt), thereby improving the anti-loosening effect.

[0015] It should be noted that the axis of the eccentric nut in this utility model refers to the axis of the threaded cavity of the eccentric nut, not the axis of the eccentric nut itself.

[0016] Preferably, the mating ends of the clamping nut and the eccentric nut are detachably connected to a sealing assembly;

[0017] The sealing assembly includes a sealing ring having a first sealing area adapted to a clamping nut and a second sealing area adapted to an eccentric nut.

[0018] Preferably, the side wall of the compression nut is provided with a limiting piece, and a limiting groove adapted to the limiting piece is provided on the inner wall of the first sealing area of ​​the sealing ring.

[0019] Preferably, the thickness of the limiting piece gradually increases from the side closest to the eccentric nut to the other side.

[0020] By adopting the above technical solution:

[0021] Because this invention has notches and gaps on the truncated cone, it increases the possibility of rainwater and other substances entering the threaded cavity of the eccentric nut or the threaded cavity of the clamping nut. Therefore, a sealing component is added between the clamping nut and the eccentric nut to improve the sealing effect between the eccentric nut and the clamping nut. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a specific embodiment 1 of the present utility model;

[0024] Figure 2 for Figure 1 An explosion diagram;

[0025] Figure 3 for Figure 1 AA section view in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of a specific embodiment 2 of the present utility model;

[0027] Figure 5 This is a schematic diagram of the sealing ring in specific embodiment 2 of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-3 As shown, this utility model discloses a combined anti-loosening and anti-disassembly nut, including an eccentric nut 10 and a clamping nut 20. The eccentric nut 10 and the clamping nut 20 are respectively provided with mutually adapted truncated cones 30 and truncated cone cavities 40. The truncated cones 30 are fixedly connected to the eccentric nut 10 and are provided with notches 300. In this embodiment, the truncated cones 30 and the eccentric nut 10 are integrally formed.

[0030] A gap 301 is provided between the truncated cone 30 and the eccentric nut 10. The gap extends along the truncated cone 30 from the connection point between the truncated cone 30 and the eccentric nut 10 to the notch 300. In this embodiment, the gap between the eccentric nut 10 and the truncated cone 30 can be manufactured by cutting and processing an existing eccentric nut. One manufacturing method is as follows:

[0031] Take an existing eccentric nut, use an existing lathe to first process a notch on the truncated cone 30, and then cut the connection between the eccentric nut and the truncated cone to form the gap in this embodiment. The gap in this embodiment is in the same direction as the extension of the truncated cone. After processing, one end of the truncated cone is integrally formed with the eccentric nut 10, and the remaining positions of the truncated cone are spaced apart from the eccentric nut. The gap is the gap in this embodiment.

[0032] In this embodiment, when the eccentric nut 10 and the clamping nut 20 are assembled with the bolt in sequence, when the truncated cone 30 on the eccentric nut enters the truncated cone cavity 40 of the clamping nut 20, the truncated cone cavity 40 squeezes the truncated cone 30 towards the axis of the eccentric nut through the cavity wall. In this embodiment, since the cross-sectional diameter of the truncated cone cavity gradually decreases (similar to a frustum shape), and the cross-sectional diameter of the truncated cone also gradually decreases (also similar to a frustum shape), and in order to ensure that the truncated cone cavity can squeeze the truncated cone, the maximum diameter of the truncated cone cavity (that is, the diameter of the cavity opening) is greater than the minimum diameter of the truncated cone, and the minimum diameter of the truncated cone is less than the minimum diameter of the truncated cone, when the truncated cone enters the truncated cone cavity, the inner wall of the truncated cone cavity will squeeze the truncated cone and cause the truncated cone to converge towards the axis (at this time, the notch of the truncated cone will gradually close, and the volume of the outer wall of the truncated cone will also gradually decrease until it matches the truncated cone cavity), thereby making the threads on the inner wall of the truncated cone and the bolt fit more tightly.

[0033] In this embodiment, the axis of the eccentric nut refers to the axis of the threaded cavity in the eccentric nut.

[0034] In this embodiment: To improve the anti-loosening effect, both the eccentric nut and the clamping nut are anti-theft nuts. Anti-theft nuts refer to nuts with anti-theft grooves 50 set in the threaded cavity. The depth of the anti-theft grooves gradually increases, and steel balls 51 are placed in the anti-theft grooves. Through the change in the depth of the anti-theft grooves and the steel balls, the clamping nut and the eccentric nut have a better anti-loosening effect when they are used with bolts. Anti-theft nuts are currently mature existing technology. Therefore, their anti-loosening principle will not be described in detail in this embodiment.

[0035] In this embodiment, to further improve the anti-loosening effect, the threads of both the clamping nut and the eccentric nut can be the existing Spirax threads.

[0036] In this embodiment, the volume of the outer wall of the truncated cone refers to the volume of the shape formed by the outline of the outer wall of the truncated cone.

[0037] Example 2 differs from Example 1 in that:

[0038] like Figures 4-5 As shown, in this embodiment: the mating end of the clamping nut 20 and the eccentric nut 10 is detachably connected to a sealing component 6;

[0039] The sealing component 6 includes a sealing ring 60, which has a first sealing area 61 adapted to the clamping nut and a second sealing area 62 adapted to the eccentric nut. In this embodiment, the outer wall cross-sectional shape of the clamping nut and the eccentric nut is a regular hexagon, and the corresponding cross-sectional shape of the first sealing area 61 and the second sealing area 62 is also set to a regular hexagon.

[0040] In this embodiment: the side wall of the clamping nut is provided with a limiting piece 63, and a limiting groove 64 adapted to the limiting piece 63 is provided on the inner wall of the first sealing area 61 of the sealing ring 60.

[0041] In this embodiment, the thickness of the limiting piece 63 gradually increases from the side closest to the eccentric nut 10 to the other side, and the depth of the limiting groove 64 also gradually increases in the same direction.

[0042] In this embodiment, the centers of the first sealing area and the second sealing area are offset.

[0043] In this embodiment, a partition 66 is provided between the first sealing area and the second sealing area. After the sealing ring is installed, the partition is located between the eccentric nut and the clamping nut, and the partition and the limiting piece prevent the sealing cavity from moving axially, thereby preventing the sealing ring from falling off.

[0044] This embodiment improves the sealing performance between the clamping nut and the eccentric nut by setting a sealing component. During installation, firstly, the first sealing area of ​​the sealing ring is placed on the clamping nut, and the sealing ring is installed by the cooperation of the limiting piece and the limiting groove. Then, the part corresponding to the second sealing area of ​​the sealing ring is folded outward. Subsequently, the clamping nut and the eccentric nut are assembled (the sealing ring folded outward near the eccentric nut will not affect the assembly). After both nuts are installed with the bolts, the part corresponding to the second sealing area is folded inward, so that the inner wall of the second sealing area fits against the outer wall of the eccentric nut.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A combined anti-loosening and anti-disconnection nut, comprising an eccentric nut (10) and a clamping nut (20), wherein the eccentric nut (10) and the clamping nut (20) are respectively provided with mutually compatible truncated cones (30) and truncated cone cavities (40), characterized in that: The truncated cone (30) is fixedly connected to the eccentric nut (10), and a notch (300) is provided on the truncated cone (30). Among them, a gap (301) is provided between the truncated cone (30) and the eccentric nut (10). The gap (301) extends along the truncated cone (30) to the notch (300) from the connection between the truncated cone (30) and the eccentric nut (10). When the truncated cone (30) enters the truncated cone cavity (40), the truncated cone cavity (40) squeezes the truncated cone (30) towards the axis of the eccentric nut (10) through the cavity wall.

2. The combined anti-loosening and anti-disassembly nut according to claim 1, characterized in that: The truncated cone (30) and the eccentric nut (10) are integrally formed.

3. A combined anti-loosening and anti-disassembly nut according to claim 1 or 2, characterized in that: Both the eccentric nut (10) and the clamping nut (20) are anti-theft nuts.

4. A combined anti-loosening and anti-disassembly nut according to claim 1 or 2, characterized in that: The mating end of the clamping nut (20) and the eccentric nut (10) is detachably connected to a sealing component (6); The sealing assembly (6) includes a sealing ring (60) having a first sealing area (61) adapted to the clamping nut (20) and a second sealing area (62) adapted to the eccentric nut (10).

5. A combined anti-loosening and anti-disassembly nut according to claim 4, characterized in that: The side wall of the clamping nut (20) is provided with a limiting piece (63), and a limiting groove (64) adapted to the limiting piece (63) is provided on the inner wall of the first sealing area (61) of the sealing ring (60).

6. A combined anti-loosening and anti-disassembly nut according to claim 5, characterized in that: The thickness of the limiting piece (63) gradually increases from the side closest to the eccentric nut (10) to the other side.

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