Lock bolt

Abstract

A plurality of spiral grooves which are evenly arranged at intervals are formed in the threaded face of the lock bolt, the inclined included angle between each spiral groove and a threaded rod is 15 degrees, the width of an opening of each spiral groove is 0.7 mm, the radius of a round corner of the top face of the threaded inlet side is 0.5 mm, the threaded outlet side is of a round-corner-free structure, and the depth of each spiral groove is 0.5 mm. The included angle of the spiral groove is 35 degrees. By means of the structure, due to the fact that the spiral groove opening is formed, the bolt thread is in point type contact with the nut thread, friction exists between the opening portion of the spiral groove and the nut thread when the bolt is vibrated by external force, and a certain anti-loosening effect is achieved after the bolt is fastened.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt structure technical field, concretely relates to a lock bolt. BACKGROUND

[0002] The thread of the common bolt forms single side friction after cooperating with the nut to install the fastener, the surface of the bolt and the nut is smooth, and loosening can be caused by vibration or impact force in the use process. With the development and progress of technology, it is necessary to improve the structure of the bolt to improve its use performance. SUMMARY

[0003] In view of the technical problems pointed out in the above background art, the purpose of the utility model is to provide a lock bolt.

[0004] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0005] A lock bolt, the thread surface of the lock bolt is provided with a plurality of spiral grooves arranged uniformly at intervals, the inclined angle between the spiral groove and the screw rod is 15°, the opening width of the spiral groove is 0.7mm, the radius of the fillet of the thread entry side top surface is 0.5mm, the thread exit side is a non-fillet structure, and the depth of the spiral groove is 0.5±0.1mm; the included angle of the spiral groove is 35°.

[0006] The number of the spiral grooves is 6 or 5.

[0007] Compared with the prior art, the utility model has the beneficial effects that:

[0008] By using the structure of the application, the bolt thread and the nut thread are in point contact when they are in contact, and the opening part of the spiral groove and the thread of the nut have friction when they are vibrated by external force, so that the fastener achieves a certain anti-loosening effect. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 The structure schematic diagram of the lock bolt provided by the embodiment of the application is shown in the figure;

[0010] In the figure, the spiral groove 1, the inclined angle A between the spiral groove and the screw rod;

[0011] Fig. 2 The cross-sectional structure schematic diagram of the spiral groove provided by the embodiment of the application is shown in the figure;

[0012] In the figure, the opening width B of the spiral groove, the included angle C of the spiral groove, the radius R of the fillet of the thread entry side top surface, and the depth D of the spiral groove. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0015] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood broadly. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set, and can refer to direct connection or indirect connection. Those skilled in the art can understand the specific meanings of the above terms in this patent based on specific circumstances.

[0016] like Figs. 1-2 The figure shows the structure of the embodiment provided by the present utility model.

[0017] This embodiment provides an anti-loosening bolt, in which the thread surface of the anti-loosening bolt is provided with a plurality of spiral grooves 1 evenly spaced, the inclined angle A between the spiral groove and the screw is 15 degrees, the opening width B of the spiral groove is 0.7 mm, the radius R of the rounded corner of the top surface of the thread entry side is 0.5 mm, the thread exit side is a non-rounded structure, and the depth D of the spiral groove is 0.5±0.1 mm; the angle C of the spiral groove is 35°.

[0018] Preferably, the number of the spiral grooves 1 is 6 or 5.

[0019] In the embodiment, 6 or 5 rows of helical grooves are added to the thread surface of the bolt, the helical grooves have an angle of 15° with the screw rod, the opening width of the helical grooves is 0.7mm, the thread entry side top surface is a round corner with a radius of 0.5mm, so that the bolt thread does not jam when entering, the thread exit side is a non-round corner, and the groove depth is 0.5mm; because of the opening of the helical grooves, the bolt thread and the nut thread are in point contact when they are in contact, when the fastener is vibrated by external force, the opening part of the helical grooves rubs against the nut thread, and the fastener achieves a certain anti-loosening effect.

[0020] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A check bolt, characterized in that, The thread surface of the anti-loose bolt is provided with a plurality of spiral grooves (1) arranged uniformly at intervals, the included angle (A) between the spiral groove and the screw rod is 15°, the opening width (B) of the spiral groove is 0.7 mm, the radius (R) of the fillet of the thread entry side is 0.5 mm, the thread exit side is a non-fillet structure, and the depth (D) of the spiral groove is 0.5±0.1 mm; the included angle (C) of the spiral groove is 35°.

2. A check bolt according to claim 1, wherein The number of the spiral grooves (1) is 6 or 5.

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