Self-locking locknut

Abstract

The self-locking locknut comprises a main nut, an auxiliary nut, a fixing cylinder, a first inserting rod, a first gear, a second inserting rod and a second gear, the fixing cylinder is fixed to the upper end of the main nut, the main nut and the fixing cylinder are of an integrated structure, inner teeth are arranged on the inner wall of the fixing cylinder, the first inserting rod is inserted into the upper end of the main nut, and the second inserting rod is inserted into the auxiliary nut. The first inserting rod is located in an area defined by the fixing cylinder, a first gear is rotationally installed on the first inserting rod and meshed with the inner teeth, the lower end face of the auxiliary nut abuts against the upper end face of the main nut, the auxiliary nut and the main nut are provided with the same threaded hole, and the auxiliary nut and the main nut are located on the same vertical central axis. The first gear and the second gear are arranged between the auxiliary nut and the fixing cylinder, so that when any one of the main nut and the auxiliary nut tends to loosen, the other one tends to be tightened, the loosing trend is blocked, and the nut is not prone to loosing.

Description

Technical Field

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

[0002] A nut is a nut that is screwed together with a bolt or a screw to tighten. It is a component that all manufacturing machinery must use. According to the different materials, it is divided into several types such as carbon steel, stainless steel, and non-ferrous metals. When using a nut, it is usually directly threaded onto the outer wall of the screw or bolt. In some situations where nuts are used, due to the use environment, the nuts will be vibrated. Ordinary nuts are easily loosened due to vibration, which will cause the nuts to lose their fixing effect and bring safety hazards. Summary of the invention

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a self-locking anti-loosening nut, which can make the nut have a good self-tightening and anti-loosening effect.

[0004] To achieve the above-mentioned purpose, the utility model proposes a self-locking anti-loosening nut, including a main nut, an auxiliary nut, a fixing cylinder, a first plug rod, a first gear, a second plug rod, and a second gear, wherein a fixing cylinder is fixed on the upper end of the main nut, the main nut and the fixing cylinder are an integrated structure, an inner wall of the fixing cylinder is provided with an inner tooth, a first plug rod is inserted into the upper end of the main nut, the first plug rod is located in the area surrounded by the fixing cylinder, a first gear is rotatably installed on the first plug rod, and the first gear is meshed with the inner tooth. The lower end surface of the auxiliary nut abuts against the upper end surface of the main nut, the auxiliary nut and the main nut have the same threaded hole, the auxiliary nut and the main nut are located on the same vertical central axis, the outer side of the auxiliary nut is cylindrical, and external teeth are provided on the outer wall of the auxiliary nut, and the external teeth are meshed with the first gear. A mounting platform is fixed on the outer wall of the auxiliary nut, and a second plug rod is inserted into the upper end of the mounting platform, the second plug rod is located in the area surrounded by the fixing cylinder, and a second gear is rotatably installed on the second plug rod, and the second gear is meshed with both the internal teeth and the external teeth.

[0005] Preferably, a slot is provided on the upper end surface of the main nut and the upper end surface of the mounting bar, the slot has a rectangular cross-section, and the end of the first plug rod and the end of the second plug rod are each provided with an insertion section adapted to the slot.

[0006] Preferably, bearings are installed on both the first gear and the second gear, the bearing on the first gear is installed on the first plug rod, and the bearing on the second gear is installed on the second plug rod.

[0007] Preferably, an external thread is provided on the outer wall of the fixing tube, an auxiliary cover is screwed on the fixing tube, an internal thread matching the external thread is provided on the inner wall of the auxiliary cover, the auxiliary inner top wall abuts against the first plug rod and the second plug rod, and an avoidance hole is provided in the center of the top wall of the auxiliary cover, and the inner diameter of the avoidance hole is larger than the inner diameter of the threaded hole.

[0008] Beneficial effects of the utility model: the utility model arranges the first gear and the second gear between the auxiliary nut and the fixing tube, so that when either the main nut or the auxiliary nut tends to loosen, the other tends to be tightened, so that the loosening tendency is blocked and the nut is not easy to loosen.

[0009] 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

[0010] Figure 1 It is a front cross-sectional view of the first embodiment of the self-locking anti-loosening nut of the utility model;

[0011] Figure 2 It is a front cross-sectional view of a second embodiment of the self-locking anti-loosening nut of the utility model.

[0012] In the figure: 1-main nut, 2-auxiliary nut, 3-first plug rod, 4-second plug rod, 5-auxiliary cover, 10-threaded hole, 11-fixing cylinder, 15-slot, 21-mounting platform, 30-insertion section, 31-first gear, 35-bearing, 41-second gear, 50-avoidance hole. DETAILED DESCRIPTION

[0013] Embodiment 1:

[0014] See also Figure 1The utility model self-locking anti-loosening nut comprises a main nut 1, an auxiliary nut 2, a fixing cylinder 11, a first plug rod 3, a first gear 31, a second plug rod 4, and a second gear 41. A fixing cylinder 11 is fixed to the upper end of the main nut 1. The main nut 1 and the fixing cylinder 11 are an integrated structure. The inner wall of the fixing cylinder 11 is provided with internal teeth. A first plug rod 3 is inserted into the upper end of the main nut 1. The first plug rod 3 is located in the area surrounded by the fixing cylinder 11. A first gear 31 is rotatably installed on the first plug rod 3. The first gear 31 meshes with the internal teeth. The lower end of the auxiliary nut 2 The end face is against the upper end face of the main nut 1, the auxiliary nut 2 and the main nut 1 have the same threaded hole 10, the auxiliary nut 2 and the main nut 1 are located on the same vertical central axis, the auxiliary nut 2 is cylindrical on the outside, and the outer wall of the auxiliary nut 2 is provided with external teeth, which are meshed with the first gear 31. A mounting platform 21 is fixed on the outer wall of the auxiliary nut 2, and a second plug rod 4 is inserted into the upper end of the mounting platform 21. The second plug rod 4 is located in the area surrounded by the fixed tube 11, and a second gear 41 is rotatably installed on the second plug rod 4, and the second gear 41 is meshed with both the internal teeth and the external teeth.

[0015] In order to prevent the first plug rod 3 and the second plug rod 4 from rotating, a slot 15 is provided on the upper end surface of the main nut 1 and the upper end surface of the mounting strip. The slot 15 has a rectangular cross-section, and the end of the first plug rod 3 and the end of the second plug rod 4 are provided with an insertion section 30 adapted to the slot 15.

[0016] The first gear 31 and the second gear 41 are both mounted with bearings 35 . The bearing 35 on the first gear 31 is mounted on the first insertion rod 3 , and the bearing 35 on the second gear 41 is mounted on the second insertion rod 4 .

[0017] Embodiment 2:

[0018] See also Figure 2 On the basis of the first embodiment, in order to prevent the first plug rod 3 and the second plug rod 4 from loosening, an external thread is provided on the outer wall of the fixing cylinder 11, and an auxiliary cover 5 is screwed on the fixing cylinder 11. The inner wall of the auxiliary cover 5 is provided with an internal thread matching the external thread. The auxiliary inner top wall resists the first plug rod 3 and the second plug rod 4. An avoidance hole 50 is provided in the center of the top wall of the auxiliary cover 5, and the inner diameter of the avoidance hole 50 is larger than the inner diameter of the threaded hole 10.

[0019] Working process of this utility model:

[0020] During the working process of the self-locking anti-loosening nut of the utility model, the main nut 1 is tightened first, and then the auxiliary nut 2 is tightened, and then the first plug rod 3 and the second plug rod 4 are installed, and finally the auxiliary cover 5 is installed.

[0021] When the main nut 1 tends to loosen, the fixing cylinder 11 on the main nut 1 will make the auxiliary nut 2 tend to be tightened through the second gear 40. Since the auxiliary nut 2 is tightened at this time, it will encounter great resistance when tightening it again, which will eventually make the main nut 1 encounter great resistance when it tends to loosen, and the main nut 1 is not easy to loosen.

[0022] On the contrary, when the auxiliary nut 2 tends to loosen, the auxiliary nut 2 will make the main nut 1 tend to be tightened through the first gear 30. Since the main nut 1 is tightened at this time, it will encounter great resistance when tightening it again, and finally the auxiliary nut 2 will encounter great resistance when it tends to loosen, and the auxiliary nut 1 is not easy to loosen.

[0023] Therefore, both the main nut 1 and the auxiliary nut 2 are not easy to loosen, and finally the whole nut is not easy to loosen.

[0024] 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. Self-locking anti-loosening nut, characterized by: The invention comprises a main nut (1), an auxiliary nut (2), a fixing cylinder (11), a first plug rod (3), a first gear (31), a second plug rod (4), and a second gear (41). A fixing cylinder (11) is fixed to the upper end of the main nut (1). The main nut (1) and the fixing cylinder (11) are an integrated structure. Internal teeth are provided on the inner wall of the fixing cylinder (11). A first plug rod (3) is inserted into the upper end of the main nut (1). The first plug rod (3) is located in an area surrounded by the fixing cylinder (11). A first gear (31) is rotatably mounted on the first plug rod (3). The first gear (31) meshes with the internal teeth. The lower end surface of the auxiliary nut (2) abuts against the main nut. The upper end surface of the nut (1), the auxiliary nut (2) and the main nut (1) have the same threaded hole (10), the auxiliary nut (2) and the main nut (1) are located on the same vertical central axis, the auxiliary nut (2) is cylindrical in exterior, the outer wall of the auxiliary nut (2) is provided with external teeth, the external teeth are meshed with the first gear (31), a mounting platform (21) is fixed on the outer wall of the auxiliary nut (2), a second insertion rod (4) is inserted into the upper end of the mounting platform (21), the second insertion rod (4) is located in the area surrounded by the fixing tube (11), a second gear (41) is rotatably mounted on the second insertion rod (4), and the second gear (41) is meshed with both the internal teeth and the external teeth.

2. The self-locking anti-loosening nut according to claim 1, characterized in that: A slot (15) is provided on the upper end surface of the main nut (1) and the upper end surface of the mounting bar. The slot (15) has a rectangular cross section. The end of the first insertion rod (3) and the end of the second insertion rod (4) are both provided with an insertion section (30) adapted to the slot (15).

3. The self-locking anti-loosening nut according to claim 1, characterized in that: The first gear (31) and the second gear (41) are both mounted with bearings (35); the bearing (35) on the first gear (31) is mounted on the first insertion rod (3), and the bearing (35) on the second gear (41) is mounted on the second insertion rod (4).

4. The self-locking anti-loosening nut according to any one of claims 1 to 3, characterized in that: An external thread is provided on the outer wall of the fixing cylinder (11), an auxiliary cover (5) is screwed onto the fixing cylinder (11), an internal thread matching the external thread is provided on the inner wall of the auxiliary cover (5), the auxiliary inner top wall abuts against the first insertion rod (3) and the second insertion rod (4), a avoidance hole (50) is provided at the center of the top wall of the auxiliary cover (5), and the inner diameter of the avoidance hole (50) is larger than the inner diameter of the threaded hole (10).

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