Self-locking stainless steel bolt nut

Abstract

The utility model discloses a self-locking stainless steel bolt nut, which relates to the technical field of bolt nuts, and comprises a screw rod and a nut body, the upper end of the screw rod is fixedly connected with a screw head, the lower end of the surface of the screw rod is provided with the nut body, the upper end of the nut body is fixedly connected with a locking disc, and the locking disc is fixedly connected with the screw head. A contact pad is arranged on the upper end face of the locking disc. According to the self-locking stainless steel bolt nut, by arranging the locking groove, the limiting plate, the locking disc and the like, when the nut body is installed on the screw rod, the nut body is tightened, so that the locking disc and a fastening workpiece are close to each other as much as possible, a contact pad is attached to the surface of the workpiece, the stability of the nut is improved, the screw rod is sleeved with the limiting plate, and the locking plate is located in the locking groove; and then the limiting plate is moved in a sliding mode, so that the positioning plates on the two sides enter the positioning grooves in a clamped mode, the clamping blocks enter the clamping grooves, the limiting plate is fixed, the nut body is limited, the nut or the screw rod is prevented from loosening, and the self-locking effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts and nuts, in particular to a self-locking stainless steel bolt and nut. Background Art

[0002] Bolts and nuts are generally matching fasteners, among which nuts are nut caps, which are parts screwed together with bolts or screws for fastening. According to different materials, they are divided into several types, such as carbon steel, high strength, stainless steel, and plastic steel. Among them, stainless steel bolts and nuts have lower cost and good anti-rust performance, and are more common.

[0003] For example, publication number CN213332001U discloses a self-locking stainless steel nut, which relates to the technical field of self-locking nuts. In order to solve the problem of using the elasticity of the spring to achieve self-locking, when the unidirectional torque is too large during use, the spring will be unevenly stressed, causing it to get stuck or the self-locking ability to drop sharply. After a period of use, it cannot provide sufficient self-locking effect, resulting in the problem of the nut loosening or falling off. The nut body is made of stainless steel metal material, a locking flange is arranged below the nut body, and the locking flange and the nut body are arranged as an integral structure, a hexagonal connector is arranged on the outside of the nut body, an internal threaded hole is arranged inside the nut body, a through hole is arranged below the internal threaded hole, a self-locking threaded collar is arranged inside the nut body, and a closing disk is arranged above the self-locking threaded collar;

[0004] The stainless steel bolts and nuts in this patent have limited self-locking performance. Vibration and impact during work can easily cause the bolts to loosen, affecting the stability of the nuts, and thus having low practicality. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a self-locking stainless steel bolt and nut, which solves the problem that the bolts are easily loosened.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a self-locking stainless steel bolt nut, comprising a screw and a nut body, the upper end of the screw is fixedly connected with a screw head, the lower end of the screw surface is provided with a nut body, the upper end of the nut body is fixedly connected with a locking disk, the upper end surface of the locking disk is provided with a contact pad, the lower end of the nut body is provided with a limiting plate, the side of the upper end of the limiting plate is fixedly connected with a positioning plate, the outer surface of the nut body is provided with a positioning groove, and the inner side of the positioning groove is provided with a locking block.

[0007] Preferably, a thread groove is provided at the lower end of the screw surface, the thread groove is threadedly connected to the nut body, and locking grooves are provided on both left and right sides of the lower end of the screw.

[0008] Preferably, the contact pad is made of wear-resistant steel, and an anti-slip groove is provided on the surface of the contact pad.

[0009] Preferably, the shapes of the limit plate and the nut body are adapted to each other, and the limit plate and the screw are sleeved, and the left and right ends of the inner side of the limit plate are fixedly connected with locking plates, and the locking plate and the locking groove are slidably connected.

[0010] Preferably, two positioning plates are symmetrically arranged on the front and rear sides of the limiting plate, the positioning plates are slidably connected to the positioning grooves, and the surfaces of the positioning plates are provided with engaging grooves.

[0011] Preferably, a telescopic groove is provided on the inner surface of the positioning groove, the telescopic groove and the locking block are slidably connected, a connecting spring is fixedly connected to the inner side of the telescopic groove, the locking block and the nut body are movably connected through the connecting spring, and the locking block and the locking groove are locked.

[0012] Beneficial Effects

[0013] The utility model provides a self-locking stainless steel bolt and nut. Compared with the prior art, it has the following beneficial effects:

[0014] The self-locking stainless steel bolt nut is provided with a locking groove, a limit plate and a locking disk, etc. When the nut body is installed on the screw rod, the nut body is tightened so that the locking disk and the fastened workpiece are as close as possible, the contact pad and the workpiece surface are in contact, and the stability of the nut is increased. The limit plate is sleeved on the screw rod so that the locking plate is located in the locking groove, and then the limit plate is slid and moved so that the positioning plates on both sides are engaged into the positioning grooves, so that the engaging blocks enter the engaging grooves, thereby fixing the limit plate and limiting the nut body, preventing the nut or the screw rod from loosening, and improving the self-locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the limiting plate of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the nut body of the utility model.

[0018] In the figure: 1. screw; 11. thread groove; 12. locking groove; 2. screw head; 3. nut body; 4. locking plate; 5. contact pad; 6. limit plate; 61. locking plate; 7. positioning plate; 71. snap-fit ​​groove; 8. positioning groove; 81. telescopic groove; 82. connecting spring; 9. snap-fit ​​block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] See also Figure 1-3 The utility model provides a technical solution: a self-locking stainless steel bolt nut, comprising a screw rod 1 and a nut body 3, wherein a screw head 2 is fixedly connected to the upper end of the screw rod 1, a nut body 3 is arranged at the lower end of the surface of the screw rod 1, a thread groove 11 is arranged at the lower end of the surface of the screw rod 1, the thread groove 11 and the nut body 3 are threadedly connected, locking grooves 12 are provided on both sides of the left and right sides of the lower end of the screw rod 1, a locking plate 4 is fixedly connected to the upper end of the nut body 3, a contact pad 5 is arranged on the upper end surface of the locking plate 4, the contact pad 5 is made of wear-resistant steel, and an anti-slip groove is arranged on the surface of the contact pad 5, after the nut body 3 is installed, the locking plate 4 and the fastened workpiece are as close as possible, the contact pad 5 and the workpiece surface are fitted, the friction between the nut body 3 and the workpiece is increased, and the stability of the nut is ensured;

[0021] A limit plate 6 is provided at the lower end of the nut body 3. The shapes of the limit plate 6 and the nut body 3 are adapted to each other, and the limit plate 6 and the screw rod 1 are sleeved. The left and right ends of the inner side of the limit plate 6 are fixedly connected with locking plates 61. The locking plate 61 and the locking groove 12 are slidably connected. By installing the limit plate 6, the locking plate 61 is located in the locking groove 12 to achieve the card engagement and limit, and the nut body 3 can be limited and fixed to avoid loosening caused by vibration and impact, thereby ensuring the self-locking effect.

[0022] A positioning plate 7 is fixedly connected to the side of the upper end of the limiting plate 6, a positioning groove 8 is provided on the surface of the outer side of the nut body 3, two positioning plates 7 are symmetrically arranged on the front and rear sides of the limiting plate 6, the positioning plate 7 and the positioning groove 8 are slidably connected, a clamping groove 71 is provided on the surface of the positioning plate 7, a clamping block 9 is provided on the inner side of the positioning groove 8, a telescopic groove 81 is provided on the surface of the inner side of the positioning groove 8, the telescopic groove 81 and the clamping block 9 are slidably connected, a connecting spring 82 is fixedly connected to the inner side of the telescopic groove 81, and the clamping block 9 and the nut body The body 3 is movably connected by a connecting spring 82, and the engaging block 9 is engaged with the engaging groove 71. When the limiting plate 6 is installed, the limiting plate 6 is moved upward so that the positioning plate 7 enters the positioning groove 8. The engaging block 9 can be telescopically moved by the elasticity of the connecting spring 82. After the positioning plate 7 and the positioning groove 8 are matched, the engaging block 9 enters the engaging groove 71 to achieve engagement, and the limiting plate 6 is installed and fixed, which is convenient for limiting the nut body 3, preventing the nut body 3 or the screw 1 from loosening, and improving the self-locking effect.

[0023] When working, first install the screw rod 1 on the fastening workpiece, then install the nut body 3 on the lower end of the screw rod 1, rotate and tighten the nut body 3, make the locking disk 4 and the fastening workpiece as close as possible, and the contact pad 5 and the workpiece surface fit together, increase the friction between the nut body 3 and the workpiece, and ensure the stability of the nut. Finally, the limit plate 6 is sleeved on the screw rod 1 so that the locking plate 61 is located in the locking groove 12 to achieve the engagement limit, which can limit and fix the nut body 3 to avoid loosening caused by vibration and impact force, and ensure the self-locking effect. At the same time, move the limit plate 6 upward so that the positioning plate 7 enters the positioning groove 8, and the engaging block 9 can be telescopically moved through the elasticity of the connecting spring 82. After the positioning plate 7 and the positioning groove 8 are matched, the engaging block 9 enters the engaging groove 71 to achieve engagement, and the limiting plate 6 is installed and fixed, which is convenient for limiting the nut body 3, preventing the nut body 3 or the screw rod 1 from loosening, and improving the self-locking effect.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A self-locking stainless steel bolt and nut, comprising a screw rod (1) and a nut body (3), characterized in that: The upper end of the screw rod (1) is fixedly connected with a screw head (2), the lower end of the surface of the screw rod (1) is provided with a nut body (3), the upper end of the nut body (3) is fixedly connected with a locking plate (4), the upper end surface of the locking plate (4) is provided with a contact pad (5), the lower end of the nut body (3) is provided with a limit plate (6), the side of the upper end of the limit plate (6) is fixedly connected with a positioning plate (7), the outer surface of the nut body (3) is provided with a positioning groove (8), and the inner side of the positioning groove (8) is provided with a locking block (9).

2. A self-locking stainless steel bolt and nut according to claim 1, characterized in that: A thread groove (11) is provided at the lower end of the surface of the screw rod (1), the thread groove (11) is threadedly connected to the nut body (3), and locking grooves (12) are provided on both left and right sides of the lower end of the screw rod (1).

3. A self-locking stainless steel bolt and nut according to claim 1, characterized in that: The contact pad (5) is made of wear-resistant steel, and a surface of the contact pad (5) is provided with an anti-slip groove.

4. A self-locking stainless steel bolt and nut according to claim 2, characterized in that: The shapes of the limiting plate (6) and the nut body (3) are adapted to each other, and the limiting plate (6) and the screw rod (1) are sleeved together. The left and right ends of the inner side of the limiting plate (6) are fixedly connected with locking plates (61), and the locking plates (61) and the locking grooves (12) are slidably connected.

5. A self-locking stainless steel bolt and nut according to claim 1, characterized in that: Two positioning plates (7) are symmetrically arranged on the front and rear sides of the limiting plate (6); the positioning plates (7) are slidably connected to the positioning grooves (8); and a locking groove (71) is provided on the surface of the positioning plates (7).

6. A self-locking stainless steel bolt and nut according to claim 5, characterized in that: A telescopic groove (81) is provided on the inner surface of the positioning groove (8), the telescopic groove (81) and the engaging block (9) are slidably connected, a connecting spring (82) is fixedly connected to the inner side of the telescopic groove (81), the engaging block (9) and the nut body (3) are movably connected via the connecting spring (82), and the engaging block (9) and the engaging groove (71) are engaged and connected.

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