Bolt type anti-falling screw

Abstract

The utility model discloses a bolt type anti-falling screw which comprises a screw body, a fastening groove is formed in the surface of the screw body, the fastening groove extends in the length direction of the screw body, the two ends of the fastening groove penetrate through the two ends of the screw body, a nut is installed on the outer side of the screw body in a threaded mode, and the bolt type anti-falling screw comprises a bolt body. A fastening plug pin is arranged in the fastening groove and located on the inner side of the nut. Secondary locking is achieved in the mode that the fastening plug pin is inserted, a mechanical interlocking mechanism is formed, the mode can provide higher rotation resistance after the screw is screwed, the anti-loosening screw is particularly suitable for resisting strong vibration or dynamic loads, the anti-loosening screw is more reliable compared with a screw which only depends on friction force to prevent loosening, the nut is prevented from being separated from a screw body, and the anti-loosening effect is good. The structure is simple and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a latch-type anti-slip screw. Background Art

[0002] Screws are tools that use the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually fasten objects and parts. Screws are a general term for fasteners and a daily colloquialism. Screws are indispensable industrial necessities in daily life: such as the tiny screws used in cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; as for engineering, construction, and bridges, large screws and nuts are used.

[0003] When large screws and nuts are used in some high-frequency oscillation industries, such as aerospace, shipping and automobile industries, the screws and nuts are easy to loosen or fall off during daily vibrations. The traditional method to prevent the screws and nuts from loosening is generally to use spring washers, self-locking nuts or other screws with additional anti-loosening devices, but the above methods have the following problems: 1. Some anti-loosening screws with locking mechanisms have too complicated structures and assembly processes; 2. Fixing with spring washers is not convenient for subsequent inspection and maintenance. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a latch-type anti-slipping screw to solve the problems of the prior anti-slipping screws, such as complex structure and assembly process, inconvenience in use, and inconvenience in subsequent inspection and maintenance.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a pin-type anti-slip screw, including a screw body, a surface of the screw body is provided with a fastening groove, the fastening groove extends along the length direction of the screw body, and the two ends of the fastening groove pass through the two ends of the screw body, a nut is installed on the outer thread of the screw body, a fastening pin is arranged in the fastening groove, and the fastening pin is located on the inner side of the nut.

[0006] Preferably, a limiting groove is provided at a position where the fastening groove passes through the head of the screw body.

[0007] Preferably, a limiting end is provided at one end of the fastening pin inserted into the head of the screw body, and the limiting end corresponds to and cooperates with the limiting groove.

[0008] Preferably, the fastening groove is a U-shaped structure.

[0009] Preferably, the fastening pin is a U-shaped structure, and the fastening pin is plug-fitted into the fastening groove.

[0010] Preferably, the fastening pin is a bendable steel bar structure.

[0011] The utility model provides a latch-type anti-slip screw, which has the following beneficial effects:

[0012] 1. The utility model realizes secondary locking by inserting a fastening pin to form a mechanical interlocking mechanism. This method can provide stronger anti-rotation ability after the screw is tightened, and is particularly suitable for resisting strong vibration or dynamic load. It is more reliable than screws that rely solely on friction to prevent loosening, and prevents the nut from separating from the screw body. It has a simple structure and is easy to operate.

[0013] 2. The utility model uses a latch-type locking method to visually see the locking status. It can be judged whether the screw is in an anti-loosening state by visually checking whether the latch is in place, which is convenient for later inspection and maintenance;

[0014] 3. The latch-type anti-slip screws have a built-in locking mechanism, which simplifies the assembly process, reduces the number and cost of assembly parts, and also reduces the risk of possible omissions or damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall explosion diagram of the first embodiment of the present utility model;

[0016] Figure 2 It is a cross-sectional view of the screw body in the first embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the head structure of the screw body in the first embodiment of the present utility model;

[0018] Figure 4 This is a schematic structural diagram of a fastening latch in the first embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the use state of the first embodiment of the utility model;

[0020] Figure 6 It is a cross-sectional view of the screw body in the second embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the head structure of the screw body in the second embodiment of the present utility model;

[0022] Figure 8 It is a structural schematic diagram of the fastening pin in the second embodiment of the utility model.

[0023] In the figure:

[0024] 1. Screw body; 2. Fastening groove; 201. Limiting groove; 3. Nut; 4. Fastening pin; 401. Limiting end. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] See also Figure 1-5 The utility model provides a technical solution: a latch-type anti-slip screw, comprising a screw body 1, a surface of the screw body 1 is provided with a fastening groove 2, the fastening groove 2 extends along the length direction of the screw body 1, and the two ends of the fastening groove 2 pass through the two ends of the screw body 1, a nut 3 is threadedly installed on the outer side of the screw body 1, a fastening latch 4 is arranged in the fastening groove 2, and the fastening latch 4 is located on the inner side of the nut 3.

[0028] In this embodiment, the position where the fastening groove 2 passes through the head of the screw body 1 is provided with a limiting groove 201, and the end of the fastening pin 4 inserted into the head of the screw body 1 is provided with a limiting end 401, and the limiting end 401 corresponds to the limiting groove 201. In this way, when in use, the fastening pin 4 is inserted into the fastening groove 2 from the limiting groove 201 until the limiting end 401 is stuck in the limiting groove 201, and the nut 3 is rotated onto the screw body 1, and the end of the fastening pin 4 is bent downward to squeeze the nut 3, and the bent part of the fastening pin 4 is used to squeeze the nut 3 outward. Due to the effect of the thread, the nut 3 needs to be rotated to disengage, and a distance movement will be generated during the rotation. The distance movement of the nut 3 is limited by the fastening pin 4, which also limits the rotation of the nut 3, and prevents the nut 3 from loosening and disengaging.

[0029] Embodiment 2

[0030] See also Figure 6-8 The utility model provides a technical solution: a latch-type anti-slip screw, comprising a screw body 1, a surface of the screw body 1 is provided with a fastening groove 2, the fastening groove 2 extends along the length direction of the screw body 1, and the two ends of the fastening groove 2 pass through the two ends of the screw body 1, a nut 3 is threadedly installed on the outer side of the screw body 1, a fastening latch 4 is arranged in the fastening groove 2, and the fastening latch 4 is located on the inner side of the nut 3.

[0031] In this embodiment, the fastening groove 2 is a U-shaped structure, the fastening pin 4 is a U-shaped structure, and the fastening pin 4 is plugged into the fastening groove 2. When in use, the fastening pin 4 is inserted into the fastening groove 2 from the head position of the screw body 1 until the fastening pin 4 is tightly fitted with the fastening groove 2, the nut 3 is rotated onto the screw body 1, and the two ends of the fastening pin 4 are bent downward to squeeze the nut 3 outward using the bent part of the fastening pin 4. Due to the effect of the thread, the nut 3 needs to be rotated to disengage, and a distance movement will be generated during the rotation. The distance movement of the nut 3 is limited by the fastening pin 4, which also limits the rotation of the nut 3, thereby preventing the nut 3 from loosening and disengaging.

[0032] As a preferred embodiment, the fastening pin 4 is a special steel bar structure with sufficient toughness and strength. The steel bar can be bent downward by external force, and the bent steel bar is used to squeeze the nut 3 to prevent the nut 3 from rotating, loosening or falling off.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A latch-type anti-slip screw, characterized in that: The invention comprises a screw body (1), a surface of the screw body (1) is provided with a fastening groove (2), the fastening groove (2) extends along the length direction of the screw body (1), and two ends of the fastening groove (2) penetrate through two ends of the screw body (1), a nut (3) is threadedly mounted on the outer side of the screw body (1), a fastening pin (4) is arranged in the fastening groove (2), and the fastening pin (4) is located on the inner side of the nut (3).

2. The latch-type anti-slip screw according to claim 1, characterized in that: The fastening groove (2) is provided with a limiting groove (201) at a position where it passes through the head of the screw body (1).

3. The latch-type anti-slip screw according to claim 2, characterized in that: One end of the fastening pin (4) inserted into the head of the screw body (1) is provided with a limiting end (401), and the limiting end (401) corresponds to and cooperates with the limiting groove (201).

4. The latch-type anti-slip screw according to claim 1, characterized in that: The fastening groove (2) is a U-shaped structure.

5. The latch-type anti-slip screw according to claim 4, characterized in that: The fastening pin (4) is of a U-shaped structure, and the fastening pin (4) is plug-fitted into the fastening groove (2).

6. A latch-type anti-slip screw according to any one of claims 1 to 5, characterized in that: The fastening pin (4) is a bendable steel bar structure.

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