Bolt capable of preventing nut from falling off

Abstract

The utility model relates to the technical field of hardware, in particular to a bolt with an anti-falling nut, which comprises a screw rod, the nut is sleeved and screwed on a rod body of the screw rod, a limiting block is fixed at one end of the screw rod, two ends of the limiting block are connected with stop dogs in a sliding manner, one end of each stop dog is provided with an inclined surface, and the stop dogs limit the nut screwed behind the screw rod; the bolt with the anti-falling nut has the advantages that the limiting block is additionally arranged at the end of the screw rod, the two ends of the limiting block are movably connected with the check blocks, after the nut is connected to the screw rod in a threaded mode, the two check blocks are blocked at one end of the screw rod, and therefore the nut is prevented from falling off from the screw rod.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware, in particular to a bolt for preventing a nut from falling off. Background Technique

[0002] A bolt is a mechanical part, a cylindrical threaded fastener used in conjunction with a nut. A type of fastener consisting of two parts, a head and a screw rod (a cylinder with external threads), which needs to cooperate with a nut for fastening and connecting two parts with through holes.

[0003] In the prior art, two workpieces are connected together by a bolt. Specifically, after the bolt passes through the two workpieces, the nut is tightened to meet the connection of the two workpieces.

[0004] However, after long-term use of the nut and the screw rod, there is wear at the threaded connection. When the wear is severe, there is a risk of the nut falling off the screw rod. Once the nut falls off, the connection of the two workpieces fails, posing a safety hazard. Content of the Utility Model

[0005] The purpose of the utility model is to provide a bolt for preventing a nut from falling off, so as to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A bolt for preventing a nut from falling off, including a screw rod, a nut is sleeved and screwed on the rod body of the screw rod, a limiting block is fixed at one end of the screw rod, both ends of the limiting block are slidably connected with a blocking block, one end of the blocking block is provided with an inclined surface, and the blocking block limits the nut screwed on the screw rod.

[0007] Preferably, the length of the long side of the limiting block is less than the rod diameter of the screw rod, and a slot is opened on the surface of the limiting block in contact with the screw rod, and the blocking block is slidably connected in the slot.

[0008] Preferably, a guiding groove is opened on the surface of the limiting block away from the screw rod, the guiding groove communicates with the slot, and the length of the long side of the guiding groove is less than the length of the long side of the slot.

[0009] Preferably, a notch is opened at the other end of the blocking block, an elastic support piece is fixed on the surface of the notch, one end of the elastic support piece is fixed on the surface of the partition piece, one end of the partition piece is fixed on the surface of the screw rod, and the other end of the partition piece is inserted into the guiding groove.

[0010] Preferably, the elastic support piece is in the shape of an "Ω"-shaped plate structure.

[0011] Preferably, a dial is fixed on the surface of the blocking block, the dial is slidably connected in the guiding groove, and the dial protrudes from the guiding groove.

[0012] Preferably, an installation groove is opened at the end of the dial extending out of the guiding groove, and a rubber cushion block is fixed on the surface of the installation groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The bolt for preventing nut from falling off proposed by the utility model is provided with a limiting block at the end of the screw rod, and both ends of the limiting block are movably connected with a retaining block. When the nut is screwed onto the screw rod, the two retaining blocks block one end of the screw rod, thereby preventing the nut from falling off the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the utility model;

[0016] Figure 2 is a schematic semi-sectional structural diagram of the utility model;

[0017] Figure 3 is a schematic connection structural diagram of the limiting block and the retaining block of the utility model;

[0018] Figure 4 is a schematic connection structural diagram of the retaining block and the elastic support piece of the utility model.

[0019] In the figure: screw rod 1, nut 2, limiting block 3, slot 4, guide groove 5, retaining block 6, inclined surface 7, notch 8, elastic support piece 9, partition piece 10, dial 11, installation groove 12, rubber cushion block 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to clearly and completely describe the purpose and technical solution of the utility model, and make the advantages more clear, the following further details the embodiments of the utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to explain the embodiments of the utility model, not to limit the embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the utility model.

[0021] Embodiment 1

[0022] Please refer to Figures 1 to 2 , the utility model provides a technical solution: a bolt for preventing nut from falling off, including a screw rod 1, a nut 2 is sleeved and screwed on the rod body of the screw rod 1, a limiting block 3 is fixed at one end of the screw rod 1, both ends of the limiting block 3 are slidably connected with a retaining block 6, an inclined surface 7 is arranged at one end of the retaining block 6, and the retaining block 6 limits the nut 2 screwed on the screw rod 1; by installing a limiting block 3 at the end of the screw rod 1, and both ends of the limiting block 3 are movably connected with a retaining block 6, when the nut 2 is screwed on the screw rod 1, the two retaining blocks 6 block one end of the screw rod 1, thereby preventing the nut 2 from falling off the screw rod 1.

[0023] Embodiment 2

[0024] Referring to the attached Figure 3 and Figure 4 On the basis of Embodiment 1, in order to achieve elastic telescoping of the stop block 6 on the surface of the limit block 3, a guiding groove 5 is formed on the side of the limit block 3 away from the screw 1. The guiding groove 5 communicates with the slot 4, and the length of the long side of the guiding groove 5 is less than the length of the long side of the slot 4. A notch 8 is formed at the other end of the stop block 6, and an elastic support piece 9 is fixed on the surface of the notch 8. One end of the elastic support piece 9 is fixed on the surface of the partition piece 10, one end of the partition piece 10 is fixed on the surface of the screw 1, and the other end of the partition piece 10 is inserted into the guiding groove 5. The elastic support piece 9 is in the shape of an "Ω"-shaped plate structure.

[0025] Embodiment 3

[0026] On the basis of Embodiment 2, in order to achieve manually toggling the stop block 6 to retract into the slot 4, a toggle piece 11 is fixed on the surface of the stop block 6. The toggle piece 11 is slidably connected in the guiding groove 5, and the toggle piece 11 protrudes from the guiding groove 5. An installation groove 12 is formed at the end of the toggle piece 11 extending out of the guiding groove 5, and a rubber cushion block 13 is fixed on the surface of the installation groove 12.

[0027] During actual use, referring to the attached Figure 1 As shown, at this time, the stop block 6 is pushed out of the slot 4 by the elastic support piece 9 for a certain distance. The part of the stop block 6 extending out of the slot 4 blocks the nut 2. Even if the nut 2 becomes loose from the screw 1, it will not cause the nut 2 to fall off from the end of the screw 1. If it is necessary to disassemble the nut 2, two fingers respectively pinch the two toggle pieces 11. Due to the installation of the rubber cushion block 13, the toggle pieces 11 will not cut the hand. The two fingers are closed. At this time, the distance between the two toggle pieces 11 is reduced, and the toggle pieces 11 drive the corresponding stop block 6 to move towards the inside of the slot 4, and the stop block 6 squeezes the elastic support piece 9 to deform. Until the stop block 6 retracts into the slot 4, the nut 2 can be unscrewed and removed from the end of the screw 1 by hand.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt with a nut that prevents it from falling off, comprising a screw rod (1), a nut (2) being threadedly mounted on the rod body of the screw rod (1), characterized in that: A limiting block (3) is fixed at one end of the screw rod (1), and both ends of the limiting block (3) are slidably connected to a stopper (6), one end of the stopper (6) is provided with an inclined surface (7), and the stopper (6) limits the position of a nut (2) threadedly connected to the screw rod (1).

2. A bolt with a nut that prevents it from falling off according to claim 1, characterized in that: The length of the long side of the limit block (3) is smaller than the rod diameter of the screw rod (1); a slot (4) is provided on the contact surface between the limit block (3) and the screw rod (1); and the stopper (6) is slidably connected in the slot (4).

3. A bolt with a nut that prevents it from falling off according to claim 2, characterized in that: A guide groove (5) is provided on a side of the limit block (3) away from the screw rod (1); the guide groove (5) is connected to the slot (4); and the long side length of the guide groove (5) is shorter than the long side length of the slot (4).

4. A bolt with a nut that prevents it from falling off according to claim 3, characterized in that: The other end of the stopper (6) is provided with a notch (8), the surface of the notch (8) is fixed with an elastic support sheet (9), one end of the elastic support sheet (9) is fixed to the surface of a separator (10), one end of the separator (10) is fixed to the surface of the screw (1), and the other end of the separator (10) is inserted into the guide groove (5).

5. A bolt with a nut that prevents it from falling off according to claim 4, characterized in that: The elastic support sheet (9) is in the form of an "Ω"-shaped plate.

6. A bolt with a nut that prevents it from falling off according to claim 3, characterized in that: A paddle (11) is fixed on the surface of the stopper (6), the paddle (11) is slidably connected in the guide groove (5), and the paddle (11) protrudes from the guide groove (5).

7. A bolt with a nut that prevents it from falling off according to claim 6, characterized in that: An end of the paddle (11) extending out of the guide groove (5) is provided with a mounting groove (12), and a rubber pad (13) is fixed on the surface of the mounting groove (12).

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