Anti-loosening and anti-theft nut

Abstract

The utility model discloses an anti-loosing and anti-theft nut which comprises an inner nut body, a rotating sleeve, a limiting ring, a shielding ring and a plurality of limiting studs, the inner nut body is a nylon anti-loosing nut, the rotating sleeve is sleeved outside a main nut body, the limiting ring is fixed on the inner wall of the rotating sleeve, the limiting studs are screwed on the outer wall of the main nut body, and the shielding ring is fixed on the outer wall of the main nut body. The limiting studs are horizontally arranged and located on the same horizontal circumferential face, the limiting studs are located above the limiting ring, one part of the lower projection of each limiting stud falls on the limiting ring, the limiting studs are located in the rotating sleeve, and a screwing groove is formed in the end, close to the rotating sleeve, of each limiting stud. The rotating sleeve is provided with a plurality of through holes in one-to-one correspondence with the limiting studs, the through holes allow the limiting studs to penetrate through, the inner wall of the rotating sleeve is provided with a shielding ring, the shielding ring is located above the inner nut, and the lower projection of the shielding ring completely covers the gap between the rotating sleeve and the inner nut.

Description

[Technical field]

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of anti-loosening and anti-theft nuts. [Background technology]

[0002] Ordinary nuts are common fasteners with internal threads in their screw holes and are used in conjunction with bolts. They are widely used in the field of mechanical connections. In some special occasions, such as power transmission towers in power systems and guardrails on highways, nuts are required to have anti-theft functions to prevent damage by lawbreakers. Existing ordinary nuts cannot meet the requirements of anti-loosening and anti-theft. [Contents of the utility model]

[0003] The utility model aims to solve the problems in the prior art and provides an anti-loosening and anti-theft nut, which can make the nut have good anti-loosening and anti-theft performance.

[0004] To achieve the above-mentioned objectives, the utility model proposes an anti-loosening and anti-theft nut, comprising an inner nut, a rotating sleeve, a limiting ring, a shielding ring, and a limiting stud. The inner nut is a nylon anti-loosening nut, a rotating sleeve is sleeved on the outside of the main nut, a limiting ring is fixed on the inner wall of the rotating sleeve, a plurality of limiting studs are screwed on the outer wall of the main nut, the limiting studs are arranged horizontally, all the limiting studs are located on the same horizontal circumferential plane, the limiting studs are located above the limiting ring, a part of the lower projection of the limiting studs falls on the limiting ring, the limiting studs are located inside the rotating sleeve, a screwing groove is provided at the end of the limiting studs close to the rotating sleeve, a plurality of through holes corresponding to the limiting studs are provided on the rotating sleeve, the through holes allow the limiting studs to pass through, a shielding ring is provided on the inner wall of the rotating sleeve, the shielding ring is located above the inner nut, the lower projection of the shielding ring completely covers the gap between the rotating sleeve and the inner nut, and the inner diameter of the shielding ring is larger than the inner diameter of the inner nut.

[0005] Preferably, the twisting groove is in the shape of a triangle, a quadrilateral, a pentagon or an ellipse.

[0006] Preferably, the inner nut is a hexagonal nut, and the diameter of the circumscribed circle of the inner nut is smaller than the inner diameter of the limiting ring.

[0007] Preferably, an auxiliary cylinder is provided inside the rotating sleeve, and the auxiliary cylinder is sleeved on the outside of the inner nut, and a limiting ring is against the bottom end of the auxiliary cylinder. The auxiliary cylinder is allowed to move above the through hole, and the auxiliary cylinder is equipped with a pulling tool, which consists of a vertically arranged first rod body and a horizontally arranged second rod body, and the second rod body is fixed at the bottom end of the first rod body. An auxiliary through groove allowing the pulling tool to pass through is provided on the shielding ring, and the gap between the auxiliary cylinder and the inner nut allows the second rod body to extend into, and a circle of annular grooves allowing the second rod body to extend into is provided on the inner wall of the auxiliary cylinder.

[0008] Preferably, a spring which is always in a compressed state is sandwiched between the blocking ring and the auxiliary tube, two ends of the spring are respectively fixed to the blocking ring and the auxiliary tube, and the spring is sleeved on the outside of the inner nut.

[0009] The beneficial effects of the utility model: the utility model is achieved by.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 This is a front view of the first embodiment of the anti-loosening and anti-theft nut of the utility model;

[0012] Figure 2 This is a front view of the second embodiment of the anti-loosening and anti-theft nut of the utility model;

[0013] Figure 3 It is a front view of the third embodiment of the anti-loosening and anti-theft nut of the utility model.

[0014] In the figure: 1-inner nut, 2-rotating sleeve, 3-auxiliary cylinder, 4-pulling tool, 10-limiting stud, 11-twisting groove, 20-through hole, 21-limiting ring, 22-blocking ring, 23-auxiliary through groove, 30-annular groove, 35-spring, 41-first rod body, 42-second rod body. [Specific implementation method]

[0015] Embodiment 1:

[0016] See also Figure 1 The utility model anti-loosening and anti-theft nut comprises an inner nut 1, a rotating sleeve 2, a limiting ring 21, a blocking ring 22, and a limiting stud 10. The inner nut 1 is a nylon anti-loosening nut. The outer sleeve of the main nut is covered with a rotating sleeve 2. A limiting ring 21 is fixed on the inner wall of the rotating sleeve 2. A plurality of limiting studs 10 are screwed on the outer wall of the main nut. The limiting studs 10 are arranged horizontally. All the limiting studs 10 are located on the same horizontal circumferential surface. The limiting studs 10 are located above the limiting ring 21. The lower projection of the limiting studs 10 has a Part of it falls on the limiting ring 21, the limiting stud 10 is located inside the rotating sleeve 2, and a screwing groove 11 is provided at the end of the limiting stud 10 close to the rotating sleeve 2. The rotating sleeve 2 is provided with a plurality of through holes 20 corresponding to the limiting stud 10 one by one, and the through holes 20 allow the limiting stud 10 to pass through. A shielding ring 22 is provided on the inner wall of the rotating sleeve 2, and the shielding ring 22 is located above the inner nut 1. The lower projection of the shielding ring 22 completely covers the gap between the rotating sleeve 2 and the inner nut 1, and the inner diameter of the shielding ring 22 is larger than the inner diameter of the inner nut 1.

[0017] In order to ensure that the limiting stud 10 is difficult to be screwed off with an ordinary screwdriver, the screwing groove 11 is in a triangle, a quadrilateral, a pentagon, or an ellipse.

[0018] The inner nut 1 is a hexagonal nut, and the diameter of the circumscribed circle of the inner nut 1 is smaller than the inner diameter of the limiting ring 21 .

[0019] In this solution, the rotating sleeve 2 and the limiting ring 21 are an integrated structure.

[0020] Embodiment 2:

[0021] In order to cover the through hole 20, the rotating sleeve 2 and the limiting ring 21 are arranged in a split type, and the limiting ring 21 is detachably installed on the rotating sleeve 2. An auxiliary cylinder 3 is provided inside the rotating sleeve 2, and the auxiliary cylinder 3 is sleeved on the outside of the inner nut 1. The limiting ring 21 abuts against the bottom end of the auxiliary cylinder 3, and the auxiliary cylinder 3 is allowed to move to the top of the through hole 20. The auxiliary cylinder 3 is equipped with a pulling tool 4, and the pulling tool 4 is composed of a vertically arranged first rod body 41 and a horizontally arranged second rod body 42. The second rod body 42 is fixed at the bottom end of the first rod body 41. The shielding ring 22 is provided with an auxiliary through groove 23 allowing the pulling tool 4 to pass through. The gap between the auxiliary cylinder 3 and the inner nut 1 allows the second rod body 42 to extend into. The inner wall of the auxiliary cylinder 3 is provided with a circle of annular grooves 30 allowing the second rod body 42 to extend into.

[0022] Embodiment 2:

[0023] In order to ensure that the auxiliary tube 3 can cover the through hole 20 in various postures of the nut, a spring 35 that is always in a compressed state is sandwiched between the shielding ring 22 and the auxiliary tube 3, and the two ends of the spring 35 are respectively fixed to the shielding ring 22 and the auxiliary tube 3, and the spring 35 is sleeved on the outside of the inner nut 1.

[0024] Working process of this utility model:

[0025] During the working process of the utility model anti-loosening and anti-theft nut, the inner nut 1 is initially in a state without the limit stud 10 being screwed in. The inner nut 1 is first tightened, and then the rotating sleeve 2 is sleeved on the outside of the inner nut 1. Then the auxiliary cylinder 3 is pulled up using the pulling tool 4 so that the through hole 20 is no longer covered. Then the rotating sleeve 2 is rotated so that the through hole 20 is aligned with the installation position of the limit stud 10 on the inner nut 1. Then the upper limit stud 10 is installed, and then the pulling tool 4 is removed. At this time, since the inner nut 1 is a nylon anti-loosening nut, the inner nut has a good anti-loosening performance. At the same time, since the rotating sleeve 2 sleeved on the outside of the inner nut 1 can be rotated freely at this time and cannot be pulled out, the nut has a good anti-theft performance.

[0026] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Anti-loosening and anti-theft nut, characterized by: The invention comprises an inner nut (1), a rotating sleeve (2), a limiting ring (21), a blocking ring (22), and a limiting stud (10), wherein the inner nut (1) is a nylon anti-loosening nut, a rotating sleeve (2) is sleeved on the outside of the main nut, a limiting ring (21) is fixed on the inner wall of the rotating sleeve (2), and a plurality of limiting studs (10) are screwed on the outer wall of the main nut, the limiting studs (10) are arranged horizontally, all the limiting studs (10) are located on the same horizontal circumferential surface, the limiting studs (10) are located above the limiting ring (21), and a part of the lower projection of the limiting studs (10) falls on the limiting ring (21). The limiting stud (10) is located inside the rotating sleeve (2), and a screwing groove (11) is provided at the end of the limiting stud (10) close to the rotating sleeve (2). The rotating sleeve (2) is provided with a plurality of through holes (20) corresponding to the limiting studs (10) one by one, and the through holes (20) allow the limiting studs (10) to pass through. A shielding ring (22) is provided on the inner wall of the rotating sleeve (2), and the shielding ring (22) is located above the inner nut (1). The lower projection of the shielding ring (22) completely covers the gap between the rotating sleeve (2) and the inner nut (1), and the inner diameter of the shielding ring (22) is larger than the inner diameter of the inner nut (1).

2. The anti-loosening and anti-theft nut according to claim 1, characterized in that: The twisting groove (11) is in the shape of a triangle, a quadrilateral, a pentagon, or an ellipse.

3. The anti-loosening and anti-theft nut according to claim 1, characterized in that: The inner nut (1) is a hexagonal nut, and the diameter of the circumscribed circle of the inner nut (1) is smaller than the inner diameter of the limiting ring (21).

4. The anti-loosening and anti-theft nut according to claim 1, characterized in that: An auxiliary cylinder (3) is provided inside the rotating sleeve (2). The auxiliary cylinder (3) is sleeved on the outside of the inner nut (1). The limiting ring (21) abuts against the bottom end of the auxiliary cylinder (3). The auxiliary cylinder (3) is allowed to move to the top of the through hole (20). The auxiliary cylinder (3) is provided with a pulling tool (4). The pulling tool (4) consists of a vertically arranged first rod body (41) and a horizontally arranged second rod body (42). The second rod body (42) is fixed to the bottom end of the first rod body (41). An auxiliary through groove (23) is provided on the shielding ring (22) for allowing the pulling tool (4) to pass through. The gap between the auxiliary cylinder (3) and the inner nut (1) allows the second rod body (42) to extend into. The inner wall of the auxiliary cylinder (3) is provided with a circle of annular grooves (30) for allowing the second rod body (42) to extend into.

5. The anti-loosening and anti-theft nut according to claim 4, characterized in that: A spring (35) which is always in a compressed state is sandwiched between the shielding ring (22) and the auxiliary tube (3). Two ends of the spring (35) are respectively fixed to the shielding ring (22) and the auxiliary tube (3). The spring (35) is sleeved on the outside of the inner nut (1).

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