A twist-off type anti-loosening and anti-uninstalling ball nut

Abstract

The utility model relates to the technical field of fastener, especially relates to a twist-off type anti-loose anti-uninstalling ball nut, including nut body and the twist-off structure connected on the nut body, the utility model discloses the twist-off structure includes the twist-off head connected with the nut body, the accommodation mouth on the twist-off head and the lining screw piece, the utility model discloses the lining screw piece hides in the accommodation mouth, and has the same internal thread with the nut body, the nut body and the lining screw piece of the utility model are provided with anti-uninstalling groove respectively, and the anti-uninstalling groove can place the ball, the utility model cooperates with the bolt through the lining screw piece and the nut body to improve the anti-loose performance of nut body.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a torsion-break type anti-loosening and anti-disconnection ball nut. Background Technology

[0002] A breakable nut is a nut structure with a breakable head. After installation with a bolt, the breakable head, which can better bear the force, is broken off by increasing the torque, leaving only the nut body to engage with the bolt. The outer wall structure of the nut body is usually tapered (such as a truncated cone-shaped nut body), so it cannot be well engaged with disassembly tools (such as pipe wrenches), thus achieving the purpose of theft prevention, as in the prior art disclosed in the authorization announcement number CN201650999U on November 24, 2010.

[0003] To improve the anti-loosening effect of torsion-break nuts, existing technologies involve manufacturing nuts with thread designs similar to those of Spiessault nuts. To further enhance the anti-loosening effect of torsion-break nuts, the applicant designed a torsion-break ball anti-theft nut and filed a patent application on December 2, 2015. The prior art's authorization announcement number is CN204828249U. The torsion-break ball anti-theft nut is based on existing torsion-break nuts, with an added groove (also called an anti-disassembly groove or anti-theft groove) inside the nut. During assembly of the nut and bolt, balls (also called steel balls) are placed in the groove. Due to the varying depth of the groove, when the nut is screwed into the bolt, the balls are located at the deeper part of the groove and will not be jammed (the balls can still roll). Therefore, the nut can be screwed in smoothly. When it is necessary to unscrew the nut, the balls will move from the deeper part of the groove to the shallower part. When the nut continues to be unscrewed, the balls will jam, preventing the nut from being unscrewed, thus increasing the anti-loosening effect.

[0004] However, breakthroughs are still being sought to improve the anti-loosening effect of twist-off nuts. At present, the disposal of twist-off heads is mainly to discard them directly (such as handing them over to waste disposal companies along with other metals). However, practice has shown that when twist-off nuts are installed correctly in a standard manner, the overall shape of the twist-off head can remain unchanged (there may be slight damage to the outer contour). Therefore, twist-off heads still have some use value.

[0005] In summary, how to better handle the broken ends of torsion nuts and further improve their anti-loosening effect are problems that need to be solved at present. Utility Model Content

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

[0007] The technical solution of this utility model is achieved as follows: a torsion-break type anti-loosening and anti-disconnection ball nut, comprising a nut body and a torsion-break structure connected to the nut body, wherein the torsion-break structure includes: The break-off head is connected to the nut body; The storage opening is located on the torsion head and is coaxially arranged with the nut body; The inner threaded part can be hidden in the storage opening and has the same internal thread as the nut body; The inner wall of the inner liner screw is provided with at least one first anti-discharge groove, which can accommodate at least one anti-theft component.

[0008] Preferably, the inner wall of the nut body is provided with at least one second anti-discharge groove, which can accommodate at least one anti-theft component.

[0009] Preferably, the inner liner screw is threadedly connected to the receiving port.

[0010] Preferably, the inner liner screw includes: Inner liner, threaded connection to the storage opening; The inner lining cavity is formed on the inner lining sleeve and extends through the inner lining sleeve at both ends; The inner lining cavity is provided with the same internal thread as the nut body, and the first anti-discharge groove is provided on the cavity wall of the inner lining cavity.

[0011] Preferably, the inner liner is integrally formed with an annular limiting block whose diameter is larger than that of the storage opening.

[0012] By adopting the above technical solution: Compared with the prior art, this utility model adds an inner liner screw to the torsion head. The inner liner screw has the same internal thread as the nut body. In use, the inner liner screw can also cooperate with the bolt and tighten the helical body, thereby improving the anti-loosening effect. More specifically: When this utility model is used with a bolt, first remove the inner liner screw and then assemble the nut body with the bolt. After correct installation and reaching the specified torque, the break-off head breaks. Then remove the break-off head, assemble the inner liner with the bolt, and then assemble the break-off head with the inner liner. Tighten gradually until it abuts against the nut body. Because of the inner liner, the nut body can be better prevented from loosening.

[0013] In summary, this utility model not only improves the anti-loosening performance of the nut by setting an inner bushing, but also allows the use of a torsion bar to cooperate with the inner bushing. The torsion bar can tighten the inner bushing and make it abut against the nut body, thus adding an option for the use of the torsion bar.

[0014] Preferably, a nylon ring is provided inside the annular opening of the annular limiting block.

[0015] By adopting the above technical solution: When the inner bushing of this invention is used with a bolt, the nylon ring can increase the anti-loosening effect of the inner bushing, thereby increasing the anti-loosening effect of the nut body. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of a specific embodiment 1 of the present utility model; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 2 AA section view in the middle; Figure 4 This is a schematic diagram of the broken torsion head in section 3; Figure 5 This is a schematic diagram showing the assembly distribution of the bolts in a specific embodiment 1 of this utility model; Figure 6 This is a structural schematic diagram of a specific embodiment 2 of the present utility model. Detailed Implementation

[0018] 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.

[0019] Example 1 like Figures 1-5 As shown, this embodiment discloses a torsion-break type anti-loosening and anti-disconnection ball nut, including a nut body 10 and a torsion-break structure 2 connected to the nut body 10. The nut body 10 of this embodiment has an internal thread 10a.

[0020] The torsion structure 2 in this embodiment includes: The twisting head 20 is connected to the nut body 10. The shape of the twisting head 20 is usually a hexagonal prism, but in other scenarios, it can also be other prism shapes. The storage opening 21 is located on the torsion head 20 and is coaxially arranged with the nut body 20. The storage opening is circular in shape. The inner threaded part 22 can be hidden in the storage opening 21 and has the same internal thread 10a as the nut body 10. In this embodiment, "hidden in" means that the inner threaded part can cooperate with the storage opening 21 and be partially inserted into the storage opening 21. In this embodiment, the inner threaded part 22 cooperates with the storage opening 21 through the thread. The inner wall of the inner liner screw 22 is provided with a first anti-removal groove 22a. There can be two first anti-removal grooves 22a, which are distributed at intervals on the inner wall of the inner liner screw 22. The first anti-removal groove 22a can accommodate a ball 22b (that is, a steel ball, which is the anti-theft component in this embodiment).

[0021] In this embodiment, at least one second anti-disengagement groove 10b is provided on the inner wall of the nut body 10. The second anti-disengagement groove 10b is the same as the first anti-disengagement groove 22a and can also accommodate the ball 22b.

[0022] In this embodiment: the inner liner screw 22 is threadedly connected to the receiving port 21. The inner liner screw 22 in this embodiment includes: The inner sleeve 220 is threadedly connected to the storage opening 21. The outer side wall of the inner sleeve 220 and the inner side wall of the storage opening 21 are provided with matching threads, so that the inner sleeve 220 and the storage opening 21 are threadedly connected. The inner lining cavity 221 is formed on the inner lining sleeve 220 and is provided through the inner lining sleeve 220 at both ends; The inner lining cavity 221 is provided with an internal thread 10a that is the same as that of the nut body 10, and the first anti-dismounting groove 22a is provided on the cavity wall of the inner lining cavity 221.

[0023] In this embodiment: the inner liner 220 is integrally formed with an annular limiting block 220a with a diameter larger than the storage opening 21.

[0024] refer to Figures 1-5 To facilitate the description of the assembly sequence, this embodiment uses... Figure 4 To ensure accuracy, the openings of the nut body 10, the break-off head 20, and the inner bushing 220 are numbered. During assembly, the bolt 30 passes through the first fastener 40 and the second fastener 41. Then, the anti-loosening and anti-disengagement ball nut of this embodiment is taken out, and the inner bushing is removed. The opening ① of the nut body is then engaged with the bolt, and the bolt is screwed in clockwise (the engagement method between the nut body and the bolt is that clockwise tightening gradually and counterclockwise disengagement of the bolt. Before screwing the nut body into the bolt, the ball is placed in the second anti-disengagement groove). The nut body is then released from the second fastener 41. Then, the torque is increased to the break-off head, and the break-off head breaks off from the nut body, completing the initial installation.

[0025] Then, align the No. 3 opening of the removed inner bushing with the bolt, and screw the bolt in clockwise (the inner thread of the inner bushing and the bolt are connected in such a way that clockwise tightening will gradually tighten the bolt, while counterclockwise tightening will remove the bolt; it is the same as the inner thread of the nut body; similarly, while screwing in the inner bushing, place the ball bearings into the first anti-disengagement groove), until the inner bushing and the nut body make contact and stop.

[0026] Finally, align the No. 5 opening of the torsion bar with the No. 4 opening of the inner bushing, and engage the torsion bar with the inner bushing (the engagement method is that clockwise rotation gradually tightens the torsion bar, and counterclockwise rotation disengages it). After the torsion bar contacts the annular limiting block on the inner bushing, continue to control the torsion bar to rotate clockwise and tighten the inner bushing so that the inner bushing abuts against the nut body, thus completing the installation.

[0027] It is worth mentioning that: In this embodiment, both the first anti-disengagement groove and the second anti-disengagement groove are provided with a groove structure with gradually increasing groove depth. Based on the screwing direction of the nut body, the groove depth gradually increases from the clockwise direction.

[0028] The anti-loosening and anti-disassembly effect of this embodiment is mainly reflected in: 1. The inner wall of the nut body is equipped with ball bearings and a second anti-loosening groove, which can improve the anti-loosening ability of the nut body. The frustum-shaped nut body makes it difficult for disassembly tools (such as pipe wrenches) to fit better with the outer wall of the nut body, thus increasing the anti-theft performance.

[0029] 2. The ball bearings and the first anti-loosening groove on the inner wall of the inner bushing can improve the anti-loosening ability of the inner bushing.

[0030] 3. The inner bushing restricts the nut body, further preventing the nut body from loosening.

[0031] Example 2 differs from Example 1 in that: like Figure 6 As shown, in this embodiment, a nylon ring 50 is provided inside the annular opening of the annular limiting block.

[0032] This invention adds a nylon ring to the annular limiting block. The outer diameter of the nylon ring is larger than the inner diameter of the annular opening. Therefore, when the nylon ring is inserted into the annular opening, it has an interference fit with the annular opening. When using the inner bushing, the inner diameter of the nylon ring is slightly smaller than the outer diameter of the bolt. Therefore, when the inner bushing is screwed in, the nylon ring is squeezed and deformed, generating continuous radial pressure, increasing the resistance between the inner bushing and the bolt, thereby providing the inner bushing with anti-loosening performance.

[0033] 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 torsion-break type anti-loosening and anti-disconnection ball nut, comprising a nut body (10) and a torsion-break structure (2) connected to the nut body (10), characterized in that: The torsion structure (2) includes: The torsion head (20) is connected to the nut body (10); The storage opening (21) is located on the torsion head (20) and is coaxially arranged with the nut body (10); The inner threaded part (22) can be hidden in the storage opening (21) and has the same internal thread (10a) as the nut body (10). The inner wall of the inner liner screw (22) is provided with at least one first anti-removal groove (22a), which can accommodate at least one anti-theft component.

2. The torsion-break type anti-loosening and anti-disconnection ball nut according to claim 1, characterized in that: The inner wall of the nut body (10) is provided with at least one second anti-disassembly groove (10b), which can accommodate at least one anti-theft component.

3. A torsion-break type anti-loosening and anti-disconnection ball nut according to claim 1 or 2, characterized in that: The inner liner screw (22) is threadedly connected to the receiving port (21).

4. A torsion-break type anti-loosening and anti-disconnection ball nut according to claim 3, characterized in that: The inner liner screw (22) includes: The inner liner (220) is threaded to the receiving port (21); The inner lining cavity (221) is formed on the inner lining sleeve (220) and is provided through the inner lining sleeve (220) at both ends; The inner lining cavity (221) is provided with the same internal thread (10a) as the nut body (10), and the first anti-discharge groove (22a) is provided on the cavity wall of the inner lining cavity (221).

5. A torsion-break type anti-loosening and anti-disconnection ball nut according to claim 4, characterized in that: The inner liner (220) is integrally formed with an annular limiting block (220a) with a diameter larger than the storage opening (21).

6. A torsion-break type anti-loosening and anti-disconnection ball nut according to claim 5, characterized in that: The annular opening of the annular limiting block (220a) is provided with a nylon ring (50).

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