Anti-loosening fastening nut

Abstract

The utility model relates to a nut, belongs to the technical field of nuts, and particularly relates to an anti-loosening fastening nut which comprises a screw rod and further comprises a nut body. The nut body is spirally installed on the side wall of the screw rod, a sleeve is fixedly installed on the wall face of the top end of the nut body, an inner thread corresponding to the side wall of the screw rod is formed in the inner side wall of the sleeve, an annular plate is rotatably installed on the outer side wall of the sleeve, and the inner side wall of the annular plate is attached to the outer side wall of the sleeve; external threads are formed in the outer side wall of the annular plate, and a threaded groove is formed in the wall face of the bottom end of the connecting piece; the thread on the inner side wall of the nut body is fixed with the thread on the side wall of the screw rod, and the thread on the side wall of the annular plate is fixed with the thread on the inner side wall of the thread groove, so that in the using process, friction force is continuously overlapped and enhanced, friction resistance and axial acting force generated between the friction force and the axial acting force are jointly restrained, and the anti-loosening effect is improved; the problem that an existing anti-loosening fastening nut is poor in anti-loosening effect is solved.

Description

Technical Field

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

[0002] Nuts are one of the commonly used fasteners in the mechanical field. They are usually used in conjunction with bolts or screws to fasten two parts with through holes. In connecting assemblies, threaded connection is the most commonly used fastening structure, but it has an inevitable weakness, that is, the threads will loosen by themselves in an environment of severe vibration and variable loads, causing damage or disintegration of components or a complete equipment, and even causing safety accidents.

[0003] The Chinese patent publication number is CN220551362U, which discloses an anti-loosening fastening nut, including a fastening cover, a first through hole is provided at the top of the fastening cover, a fastener is inserted inside the first through hole, a plug-in board is fixedly connected to the bottom end of the fastener, and positioning plug-ins are fixedly connected to the four corners of the bottom end of the fastening cover respectively, and the bottom end protrusion of the positioning plug-in is snapped into the inside of the positioning slot, and the positioning slot is provided in the side wall of the fixing nut, and the fastening cover and the fixing nut are fixed by plugging them together through the fastener, thereby limiting the activity space of the screw, thereby preventing the screw from loosening during vibration, and preventing the possibility of the fastening cover falling off due to vibration by plugging the positioning plug-in into the side wall of the fixing nut, further tightening the snap-on connection mode between the fastening cover and the fixing nut.

[0004] The above technical solution fixes the fastening cover and the fixing nut together through the fastener insertion, thereby limiting the activity space of the screw, thereby preventing the screw from loosening during vibration, and preventing the possibility of the fastening cover falling off due to vibration by inserting the positioning plug into the side wall of the fixing nut. However, after the fastening cover and the fixing nut are relatively fixed, the nut and the screw are still spirally installed, and there is no limit between the nut and the screw, which cannot prevent the fastener and the nut from loosening and slipping, and the anti-loosening effect is poor. Utility Model Content

[0005] In order to solve the above technical problems, the utility model proposes an anti-loosening fastening nut, in which the threads on the inner side wall of the nut body are fixed to the threads on the side wall of the screw, and the threads on the side wall of the annular plate are fixed to the threads on the inner side wall of the thread groove. During use, the friction force is continuously superimposed and enhanced, and the friction resistance and axial force generated between each other are jointly restrained, thereby increasing the anti-loosening effect.

[0006] The technical solution to achieve the purpose of the utility model is: an anti-loosening fastening nut, including a screw rod, a bolt head is fixedly installed on the top wall of the screw rod, a connecting piece is arranged on the side wall of the bolt head, and also includes;

[0007] The nut body is spirally installed on the side wall of the screw, a sleeve is fixedly installed on the top wall of the nut body, the inner side wall of the sleeve is provided with an internal thread corresponding to the side wall of the screw, an annular plate is rotatably installed on the outer side wall of the sleeve, the inner side wall of the annular plate is fitted with the outer side wall of the sleeve, the outer side wall of the annular plate is provided with an external thread, and a thread groove is provided on the bottom end wall of the connecting piece, and the thread groove is spirally installed with the annular plate.

[0008] In some embodiments, the thread pitch of the screw is greater than the thread pitch of the thread groove.

[0009] In some embodiments, a gasket is sleeved on the side wall of the screw rod, and the gasket is located between the nut body and the connecting piece.

[0010] In some embodiments, a through hole is formed on the top wall of the gasket, and the opening size of the through hole is the same as the opening size of the thread groove.

[0011] In some embodiments, a damping sheet is disposed between the inner side wall of the annular plate and the outer side wall of the sleeve.

[0012] Compared with the prior art, the utility model has the following significant advantages:

[0013] First, in the utility model, the screw rod can be passed through the connecting piece first, and then the nut body can be screwed and installed. During the process of the nut body spirally moving upward, the annular plate will contact the inner side wall of the thread groove. As the nut body continuously moves upward, the annular plate is driven by the upward force of the nut body to rotate along the thread direction of the thread groove, so that the annular plate is spirally installed inside the thread groove. After the connecting piece is tightened, the threads on the inner side wall of the nut body are fixed to the threads on the side wall of the screw rod, and the threads on the side wall of the annular plate are fixed to the threads on the inner side wall of the thread groove. Due to the different thread spacings between the screw rod and the thread groove, the friction force is continuously superimposed and enhanced during subsequent use, and the friction resistance and axial force generated between them are restrained together, thereby increasing the anti-loosening effect of the nut body. The problem of poor anti-loosening effect of existing anti-loosening fastening nuts is solved.

[0014] Second: In the utility model, a gasket is placed between the connecting piece and the nut body. When the nut body is subsequently fixed, the annular plate passes through the gasket and is spirally installed inside the thread groove. The setting of the gasket can improve the tightness and stability of the nut body installation, and at the same time, wear on the contact surface can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the overall structure of an anti-loosening fastening nut of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of an anti-loosening fastening nut of the utility model;

[0018] Figure 3 The utility model is a schematic diagram of a nut structure for preventing loosening and fastening a nut.

[0019] Description of reference numerals:

[0020] 1. Screw; 2. Bolt head; 3. Nut body; 4. Connector; 41. Thread groove; 5. Gasket; 6. Ring plate; 7. Sleeve. DETAILED DESCRIPTION

[0021] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides an anti-loosening fastening nut through improvement. The technical solution of the utility model is:

[0023] like Figure 1 - Figure 3As shown, a locking nut comprises a screw 1, a bolt head 2 is fixedly mounted on the top wall of the screw 1, a connecting piece 4 is provided on the side wall of the bolt head 2, and a nut body 3; the nut body 3 is spirally mounted on the side wall of the screw 1, a sleeve 7 is fixedly mounted on the top wall of the nut body 3, the inner side wall of the sleeve 7 is provided with an internal thread corresponding to the side wall of the screw 1, an annular plate 6 is rotatably mounted on the outer side wall of the sleeve 7, the inner side wall of the annular plate 6 is fitted with the outer side wall of the sleeve 7, the outer side wall of the annular plate 6 is provided with an external thread, a thread groove 41 is provided on the bottom end wall of the connecting piece 4, the thread groove 41 is spirally mounted on the annular plate 6, the thread pitch of the screw 1 is greater than the thread pitch of the thread groove 41, similarly, the thread pitch of the external thread on the side wall of the annular plate 6 is not equal to the thread pitch of the internal thread on the inner side wall of the sleeve 7, a damping plate is provided between the inner side wall of the annular plate 6 and the outer side wall of the sleeve 7, The setting of the plate increases the friction coefficient and prevents the nut body 3 from loosening and slipping; first, the screw rod 1 can be passed through the connecting piece 4, and then the nut body 3 can be screwed and installed. During the spiral upward movement of the nut body 3, the annular plate 6 will contact the inner side wall of the thread groove 41. As the nut body 3 continues to move upward, the annular plate 6 drives the annular plate 6 to rotate along the thread direction of the thread groove 41 with the upward force of the nut body 3, so that the annular plate 6 is spirally installed inside the thread groove 41. After the connecting piece 4 is tightened, the threads on the inner side wall of the nut body 3 are fixed to the threads on the side wall of the screw rod 1, and the threads on the side wall of the annular plate 6 are fixed to the threads on the inner side wall of the thread groove 41. Since the thread pitches of the screw rod 1 and the thread groove 41 are different, the friction force is continuously superimposed and enhanced during subsequent use, and the friction resistance and axial force generated between them are jointly restrained, thereby increasing the anti-loosening effect of the nut body 3.

[0024] like Figure 1 and Figure 2 As shown, in one embodiment, a gasket 5 is sleeved on the side wall of the screw rod 1, and the gasket 5 is located between the nut body 3 and the connecting piece 4. A through hole is opened on the top wall of the gasket 5, and the opening size of the through hole is the same as the opening size of the thread groove 41; the gasket 5 is placed between the connecting piece 4 and the nut body 3, and when the nut body 3 is subsequently fixed, the annular plate 6 passes through the gasket 5 and is spirally installed inside the thread groove 41. The setting of the gasket 5 can improve the tightness and stability of the installation of the nut body 3, and at the same time, the wear of the contact surface can be avoided.

[0025] The specific working method is: first, the screw 1 can be passed through the connecting piece 4, then the gasket 5 is placed, and then the nut body 3 is screwed and installed. During the spiral upward movement of the nut body 3, the annular plate 6 will contact the inner side wall of the thread groove 41. As the nut body 3 continues to move upward, the annular plate 6 drives the annular plate 6 to rotate along the thread direction of the thread groove 41 with the upward force of the nut body 3, so that the annular plate 6 is spirally installed inside the thread groove 41. After the connecting piece 4 is tightened, the threads on the inner side wall of the nut body 3 are fixed to the threads on the side wall of the screw 1, and the threads on the side wall of the annular plate 6 are fixed to the threads on the inner side wall of the thread groove 41. Due to the different thread spacings between the screw 1 and the thread groove 41, when loosened later, the annular plate 6 and the sleeve 7 rotate and slide and affect each other, so that in the subsequent use process, the friction force is continuously superimposed and enhanced, and the friction resistance and axial force generated between them are jointly restrained, thereby increasing the anti-loosening effect of the nut body 3.

[0026] The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims

1. A locking nut, comprising a screw rod (1), a bolt head (2) being fixedly mounted on the top wall of the screw rod (1), and a connecting piece (4) being arranged on the side wall of the bolt head (2), characterized in that: Also includes; A nut body (3) is spirally mounted on the side wall of the screw rod (1); a sleeve (7) is fixedly mounted on the top wall of the nut body (3); an inner side wall of the sleeve (7) is provided with an internal thread corresponding to the side wall of the screw rod (1); an annular plate (6) is rotatably mounted on the outer side wall of the sleeve (7); the inner side wall of the annular plate (6) is fitted with the outer side wall of the sleeve (7); an outer side wall of the annular plate (6) is provided with an external thread; a thread groove (41) is provided on the bottom wall of the connecting piece (4); and the thread groove (41) is spirally mounted on the annular plate (6).

2. The anti-loosening fastening nut according to claim 1, characterized in that: The thread pitch of the screw (1) is greater than the thread pitch of the thread groove (41).

3. The anti-loosening fastening nut according to claim 1, characterized in that: The side wall of the screw rod (1) is sleeved with a gasket (5), and the gasket (5) is located between the nut body (3) and the connecting piece (4).

4. The anti-loosening fastening nut according to claim 3, characterized in that: A through hole is formed on the top wall of the gasket (5), and the opening size of the through hole is the same as the opening size of the thread groove (41).

5. The anti-loosening fastening nut according to claim 1, characterized in that: A damping sheet is arranged between the inner side wall of the annular plate (6) and the outer side wall of the sleeve (7).

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