High-strength anti-loosening bolt

Abstract

The utility model discloses a high-strength anti-loosening bolt which comprises a bolt cap used for supporting, an inner hexagonal groove is formed in the center of the upper end face of the bolt cap, two sets of connecting rotating grooves used for limiting are formed in the upper end face of the bolt cap, and an anti-slip gasket is arranged on the lower end face of the bolt cap. And a screw rod is fixedly arranged at the center of the lower end surface of the bolt cap. In the anti-loosening process, the friction force of the bottom of the bolt cap is increased through the anti-slip gasket, then the pre-tightening force of the anti-slip gasket and a locking accessory can be improved firstly, meanwhile, after the bolt cap is limited, the elastic pressing piece and the rubber clamping ring can be driven by the threaded shaft to move downwards in a threaded mode, and therefore the elastic pressing piece can be in elastic press fit; and meanwhile, the rubber clamping ring can be pressed on the outer portion of the accessory, the torsion resistance and friction resistance are further improved, and the locking stability of the bolt cap can be improved to the maximum degree through the double-loosening design.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt equipment, in particular to a high-strength anti-loosening bolt. Background Art

[0002] A bolt is a mechanical part consisting of a head and a screw. It needs to be used in conjunction with a nut to fasten two parts with through holes. This type of connection is called a bolt connection, which is a detachable connection. Bolts are widely used in many fields, such as assembly and repair of mechanical equipment, fixing bearings and machine parts, sealing equipment, etc.

[0003] Although the existing bolts have washers to loosen when the thread rotation is limited, the pre-tightening force between the bolt and the washers is still insufficient, and it is not convenient to perform secondary tightening, so that after long-term use, the washers and the bolts are easily displaced relative to each other under external force, thereby affecting the connection stability of the bolts. Therefore, a high-strength anti-loosening bolt is urgently needed to solve the above-mentioned problems. Utility Model Content

[0004] The utility model aims to provide a high-strength anti-loosening bolt to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a high-strength anti-loosening bolt, comprising a bolt cap for support, a hexagonal groove is provided at the center of the upper end surface of the bolt cap, and two sets of connecting grooves for limiting are provided on the upper end surface of the bolt cap,

[0006] The lower end surface of the bolt cap is provided with a non-slip washer, and a screw is fixedly provided at the center of the lower end surface of the bolt cap, a guide groove is opened on the lower end surface of the bolt cap, and a locking device is slidably engaged with the inner end surface of the guide groove, and the inner end surface of the bolt cap is rotatably engaged with the limiting device through the connecting groove.

[0007] Preferably, the limiting device comprises a limiting turntable, the upper end surface of the limiting turntable is provided with a hexagonal clamping plate, and a threaded shaft is arranged at the center of the lower end surface of the limiting turntable.

[0008] Preferably, the locking device comprises an elastic pressing plate, the upper end surface of the elastic pressing plate is provided with two groups of threaded sleeves, and a rubber clamping ring is provided at the middle of the inner end surface of the elastic pressing plate.

[0009] Preferably, the limiting device is rotated and clamped on the inner end surface of the connecting groove through the limiting rotating disk, which can effectively improve the stability of the subsequent rotation of the limiting device inside the bolt nut.

[0010] Preferably, the two groups of threaded shafts are threadedly connected to the threaded sleeve, and the bottoms of the elastic pressing plate and the rubber clamping ring are flush with the bottom of the anti-slip washer, which can effectively improve the stability of subsequent secondary pre-tightening of the elastic pressing plate and the rubber clamping ring.

[0011] Preferably, the elastic pressing plate is slidably connected to the interior of the bolt cap via the guide slot, and the guide slot can provide sufficient guiding space for the elastic pressing plate, thereby facilitating the subsequent downward movement of the elastic pressing plate inside the bolt cap for pre-tightening.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. When the utility model is anti-loosening, the anti-slip washer increases the friction force at the bottom of the bolt cap, thereby firstly improving the pre-tightening force with the locking accessory, and at the same time, after the bolt cap is limited, the elastic pressure piece and the rubber clamping ring can move downward under the drive of the threaded shaft, so that the elastic pressure piece can improve the upward pre-tightening support force of the bolt cap through elastic compression, and at the same time, the rubber clamping ring can be pressed on the outside of the accessory to further improve the anti-twisting friction force. The double relaxation design can maximize the locking stability of the bolt cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a disassembled diagram of the main body of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the main body of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the limiting device of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the locking device of the utility model.

[0018] In the figure: 1-hexagonal socket, 2-limiting device, 3-locking device, 4-bolt cap, 5-screw, 6-anti-slip washer, 7-connecting groove, 8-guide groove, 21-hexagonal clamping plate, 22-limiting turntable, 23-threaded shaft, 31-elastic pressure piece, 32-threaded sleeve, 33-rubber clamping ring. 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 1-4 The utility model provides an embodiment: a high-strength anti-loosening bolt, including a bolt cap 4 for support, a hexagonal groove 1 is provided at the center of the upper end surface of the bolt cap 4, and two groups of connecting grooves 7 for limiting are provided on the upper end surface of the bolt cap 4.

[0021] A non-slip washer 6 is provided on the lower end surface of the bolt cap 4, and a screw rod 5 is fixedly provided at the center of the lower end surface of the bolt cap 4. A guide groove 8 is opened on the lower end surface of the bolt cap 4, and a locking device 3 is slidably engaged with the inner end surface of the guide groove 8. The inner end surface of the bolt cap 4 is rotatably engaged with the limiting device 2 through the connecting rotating groove 7.

[0022] The limiting device 2 comprises a limiting turntable 22 . A hexagonal clamping plate 21 is provided on the upper end surface of the limiting turntable 22 , and a threaded shaft 23 is provided at the center of the lower end surface of the limiting turntable 22 .

[0023] The locking device 3 comprises an elastic pressing piece 31 , the upper end surface of the elastic pressing piece 31 is provided with two sets of threaded sleeves 32 , and a rubber clamping ring 33 is provided at the middle of the inner end surface of the elastic pressing piece 31 .

[0024] The limiting device 2 is rotated and clamped on the inner end surface of the connecting groove 7 through the limiting rotating disk 22, which can effectively improve the stability of the subsequent rotation of the limiting device 2 inside the bolt cap 4.

[0025] The two sets of threaded shafts 23 are threadedly connected to the threaded sleeve 32, and the bottom of the elastic pressing piece 31 and the rubber clamping ring 33 are flush with the bottom of the anti-slip washer 6, which can effectively improve the stability of the subsequent secondary pre-tightening of the elastic pressing piece 31 and the rubber clamping ring 33.

[0026] The elastic pressing piece 31 is slidably connected to the inside of the bolt cap 4 through the guide slot 8. The guide slot 8 can provide sufficient guiding space for the elastic pressing piece 31, thereby facilitating the subsequent downward movement of the elastic pressing piece 31 inside the bolt cap 4 for pre-tightening.

[0027] Working principle: When in use, the user can insert the external tool into the inner hexagonal slot 1, and then position the screw 5 into the appropriate accessory for rotation and locking. When locking, the anti-slip washer 6 can first be pre-tightened with the external locking accessory. At the same time, when the anti-slip washer 6 and the bolt nut 4 reach the limit under the rotation of the tool, the user inserts the external tool into the hexagonal clamping plate 21, and then rotates it. The hexagonal clamping plate 21 can drive the threaded shaft 23 to rotate, so that the threaded shaft 23 can be connected with the threaded sleeve 32 through the thread, thereby driving the elastic pressure plate 31 and the rubber retaining ring 33 to move downward. The elastic pressure plate 31 can be deformed by pressing, thereby maximizing the pre-tightening force. At the same time, the rubber retaining ring 33 can further increase the friction between the bolt nut 4 and the accessory to prevent subsequent loosening.

[0028] 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 high-strength anti-loosening bolt, comprising a bolt cap (4) for support, a hexagonal groove (1) is provided at the center of the upper end surface of the bolt cap (4), and two groups of connecting grooves (7) for limiting are provided on the upper end surface of the bolt cap (4), characterized in that: The lower end surface of the bolt cap (4) is provided with a non-slip washer (6), and a screw rod (5) is fixedly provided at the center of the lower end surface of the bolt cap (4). A guide groove (8) is provided at the lower end surface of the bolt cap (4), and a locking device (3) is slidably engaged with the inner end surface of the guide groove (8). The inner end surface of the bolt cap (4) is rotatably engaged with the limiting device (2) through the connecting groove (7).

2. A high-strength anti-loosening bolt according to claim 1, characterized in that: The limiting device (2) comprises a limiting rotating disk (22), the upper end surface of the limiting rotating disk (22) is provided with a hexagonal clamping plate (21), and a threaded shaft (23) is arranged at the center of the lower end surface of the limiting rotating disk (22).

3. A high-strength anti-loosening bolt according to claim 2, characterized in that: The locking device (3) comprises an elastic pressing plate (31), the upper end surface of the elastic pressing plate (31) is provided with two groups of threaded sleeves (32), and a rubber clamping ring (33) is provided in the middle of the inner end surface of the elastic pressing plate (31).

4. A high-strength anti-loosening bolt according to claim 3, characterized in that: The limiting device (2) is rotated and clamped on the inner end surface of the connecting rotating groove (7) through the limiting rotating disk (22).

5. The high-strength anti-loosening bolt according to claim 3, characterized in that: The two groups of threaded shafts (23) are both threadedly connected to the threaded rotating sleeve (32), and the bottoms of the elastic pressing sheet (31) and the rubber clamping ring (33) are flush with the bottom of the anti-slip washer (6).

6. The high-strength anti-loosening bolt according to claim 3, characterized in that: The elastic pressing sheet (31) is slidably connected to the interior of the bolt cap (4) through the guide sliding groove (8).

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