Lock bolt assembly with meshing abutting structure

Abstract

The utility model provides an anti-loosing bolt assembly with a meshing abutting structure, which comprises a bolt and a nut, and further comprises a positioning notch and an anti-loosing shell cover, the positioning notch is arranged on the side wall of the bolt, the anti-loosing shell cover is jointed with the nut through a detachable matching structure, an avoiding through opening is arranged in the middle of the anti-loosing shell cover, and a positioning flange is arranged on the inner wall of the avoiding through opening. Part of the flanges extend into the positioning notches to achieve circumferential fixation, the rest of the flanges are curled outwards under axial pressure and abut against the outer wall of the thread to achieve axial fixation, the anti-loose shell cover is connected with the nut through a detachable matching connection structure, mounting and dismounting are convenient, meanwhile, the matching connection side plates can ensure the stable position of the anti-loose shell cover on the nut, circumferential deflection of the anti-loose shell cover is prevented, and the anti-loose shell cover is convenient to assemble and disassemble. And the installation convenience and stability are further improved.

Description

Technical Field

[0001] The utility model relates to a fastener, in particular to an anti-loosening bolt assembly with an engaging and abutting structure. Background Art

[0002] Patent document CN110985513B discloses an anti-loosening bolt and an anti-loosening bolt assembly, the anti-loosening bolt comprising a bolt head and a screw rod, the bolt head being arranged at one end of the screw rod for adapting to a suitable screwing tool to apply torque to the anti-loosening bolt, a tightening cavity being arranged on the end face of the screw rod away from the bolt head, a cavity wall of the tightening cavity being provided with a slot which penetrates radially along the screw rod, the tightening cavity being provided for the head of the tightening screw to enter and be adapted to the conical head of the tightening screw, so that the corresponding section of the screw rod is radially expanded when the tightening screw is tightened, a clamping boss being arranged on the cavity wall of the tightening cavity, the clamping boss forming a stop step surface facing the bolt head, the stop step surface being used to stop and cooperate with the tightening screw which moves toward the bolt head and whose head passes over the clamping boss, so as to prevent the tightening screw from withdrawing outward, so that the tightening screw cannot withdraw from the tightening cavity, thereby making the tightening cavity of the anti-loosening bolt always in a radially expanded and tightened state, which also ensures that the anti-loosening bolt has a better anti-loosening effect. However, the anti-loosening bolt is provided with an expansion cavity, and the screw rod is radially expanded by the expansion screw adapted thereto, which causes permanent deformation of the screw rod, easily generates cracks, accelerates aging, and shortens the service life. Therefore, it is necessary to optimize the structure of the anti-loosening bolt assembly to overcome the above defects. Utility Model Content

[0003] The utility model aims to provide an anti-loosening bolt assembly with an engaging abutment structure to improve its anti-loosening performance and prolong its service life.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] An anti-loosening bolt assembly with an engaging abutment structure comprises a bolt and a nut, wherein the nut is screwed onto the bolt through a threaded structure, and further comprises:

[0006] A positioning notch, which is formed on the side wall of the bolt and is recessed toward the inside of the bolt;

[0007] An anti-loosening shell cover is engaged with the nut through a detachable matching structure, a avoidance opening is opened in the middle, the bolt can pass through the avoidance opening, a positioning flange is arranged on the inner wall of the avoidance opening, the positioning flange is engaged with the positioning recess, and the position of the nut on the bolt is positioned by the positioning flange to prevent the nut from loosening.

[0008] In an embodiment of the present invention, the positioning recess extends along the axial direction of the bolt and is recessed radially toward the inside of the bolt.

[0009] In one embodiment of the present invention, the positioning notch is wedge-shaped, and its outer width is greater than its inner width.

[0010] In one embodiment of the present invention, the bolt has a bolt head section and a bolt rod section, the bolt rod section is cylindrical and has a thread on its outer wall, the bolt head section is prismatic, the inner end of the bolt rod section is engaged with the bolt head section, and the positioning recess extends from the outer end of the bolt rod section to the middle of the bolt rod section.

[0011] In one embodiment of the utility model, a group of positioning flanges are provided, and each positioning flange is arranged in sequence along the circumference of the avoidance opening, and protrudes radially inwardly of the anti-loosening shell cover, and its width is smaller than the width of the positioning recess. The positioning flange corresponding to the position of the positioning recess extends into the positioning recess and engages with the positioning recess to circumferentially position the nut and prevent the nut from circumferential rotation. The remaining positioning flanges are folded outwardly under the axial pressure of the bolt rod section, and their ends abut against the outer wall of the thread to axially position the nut and prevent the nut from axial slippage.

[0012] In one embodiment of the utility model, a group of matching side plates are provided on the edge of the anti-loosening shell cover, and each matching side plate is bent downwardly of the anti-loosening shell cover and abuts against the outer wall of the nut. The matching side plates position the anti-loosening shell cover to prevent it from circumferentially deflecting on the nut.

[0013] In one embodiment of the utility model, the inner diameter of the avoidance opening is larger than the outer diameter of the bolt rod section, and the positioning flange folded outward is inclined inward along the radial direction of the anti-loosening shell cover to form a conical structure. When the anti-loosening shell cover is subjected to an upward force and drives the positioning flange to move, it will continue to tilt inward, applying a clamping force to the bolt rod section, thereby tightening the connection between the positioning flange and the thread.

[0014] The advantages of the utility model are:

[0015] The anti-loosening bolt assembly achieves dual circumferential and axial positioning of the nut on the bolt through the mutual engagement of the positioning flange and the positioning recess, which can effectively prevent the nut from loosening or falling off due to vibration or external force, and improve the stability and reliability of the connection. The positioning recess extends along the axial direction of the bolt and is radially recessed to facilitate cooperation with the positioning flange. The design of the positioning flange can meet the needs of circumferential positioning and axial positioning. Part of the flange extends into the positioning recess to achieve circumferential fixation, and the remaining flange is folded outward under axial pressure and abuts against the outer wall of the thread to achieve axial fixation. The anti-loosening shell cover is engaged with the nut through a detachable matching structure, which is easy to install and disassemble. At the same time, the matching side plate can ensure the stable position of the anti-loosening shell cover on the nut to prevent its circumferential deflection, further improving the convenience and stability of its installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1The utility model discloses a structural schematic diagram of an anti-loosening bolt assembly with an engaging and abutting structure. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0018] like Figure 1 As shown, the anti-loosening bolt assembly with an engaging and abutting structure proposed by the utility model includes a bolt 100 and a nut 200. The nut is screwed onto the bolt through a threaded structure. It also includes a positioning recess 101 and an anti-loosening shell cover 300. The positioning recess is provided on the side wall of the bolt and is recessed into the inside of the bolt. The anti-loosening shell cover is engaged with the nut through a detachable matching structure. A avoidance opening 301 is provided in the middle thereof, and the bolt can pass through the avoidance opening. A positioning flange 302 is provided on the inner wall of the avoidance opening, and the positioning flange is engaged with the positioning recess. The position of the nut on the bolt is positioned by the positioning flange to prevent the nut from loosening.

[0019] In this embodiment, the positioning recess extends along the axial direction of the bolt and is recessed radially toward the inside of the bolt.

[0020] In this embodiment, the positioning notch is wedge-shaped, and its outer width is greater than its inner width.

[0021] In this embodiment, the bolt has a bolt head section 110 and a bolt rod section 120. The bolt rod section is cylindrical with a thread on its outer wall. The bolt head section is prismatic. The inner end of the bolt rod section is engaged with the bolt head section. The positioning recess extends from the outer end of the bolt rod section to the middle of the bolt rod section.

[0022] In this embodiment, a group of positioning flanges are provided, and each positioning flange is arranged in sequence along the circumference of the avoidance opening, and protrudes radially inwardly of the anti-loosening shell cover, and its width is smaller than the width of the positioning recess. The positioning flange corresponding to the position of the positioning recess extends into the positioning recess and engages with the positioning recess to circumferentially position the nut and prevent the nut from circumferential rotation. The remaining positioning flanges are rolled outward under the axial pressure of the bolt rod section, and their ends abut against the outer wall of the thread to axially position the nut and prevent the nut from axial slippage.

[0023] In this embodiment, a group of matching side plates 303 are provided on the edge of the anti-loosening shell cover, and each matching side plate is bent downward to the anti-loosening shell cover and abuts against the outer wall of the nut. The matching side plates position the anti-loosening shell cover to prevent it from circumferentially deflecting on the nut.

[0024] In this embodiment, the inner diameter of the avoidance opening is larger than the outer diameter of the bolt rod section, and the positioning flange folded outward is inclined inward along the radial direction of the anti-loosening shell cover to form a conical structure. When the anti-loosening shell cover is subjected to an upward force and drives the positioning flange to move, it will continue to tilt inward and apply a clamping force to the bolt rod section, thereby making the connection between the positioning flange and the thread tighter.

[0025] In the description of the present utility model, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. An anti-loosening bolt assembly with an engaging abutment structure, comprising a bolt and a nut, wherein the nut is screwed onto the bolt through a threaded structure, and wherein: Also includes: A positioning notch, which is formed on the side wall of the bolt and is recessed toward the inside of the bolt; An anti-loosening shell cover is engaged with the nut through a detachable matching structure, a avoidance opening is opened in the middle, the bolt can pass through the avoidance opening, a positioning flange is arranged on the inner wall of the avoidance opening, the positioning flange is engaged with the positioning recess, and the position of the nut on the bolt is positioned by the positioning flange to prevent the nut from loosening.

2. The anti-loosening bolt assembly with an engaging and abutting structure according to claim 1, characterized in that: The positioning recess extends along the axial direction of the bolt and is recessed radially toward the inside of the bolt.

3. The anti-loosening bolt assembly with an engaging and abutting structure according to claim 1, characterized in that: The positioning notch is wedge-shaped, and its outer width is greater than its inner width.

4. The anti-loosening bolt assembly with an engaging and abutting structure according to claim 1, characterized in that: The bolt has a bolt head section and a bolt rod section. The bolt rod section is cylindrical with threads on its outer wall. The bolt head section is prismatic. The inner end of the bolt rod section is connected to the bolt head section. The positioning notch extends from the outer end of the bolt rod section to the middle of the bolt rod section.

5. The anti-loosening bolt assembly with an engaging and abutting structure according to claim 4, characterized in that: A group of positioning flanges are provided, and each positioning flange is arranged in sequence along the circumference of the avoidance opening, and protrudes radially inwardly of the anti-loosening shell cover, and its width is smaller than the width of the positioning recess. The positioning flange corresponding to the position of the positioning recess extends into the positioning recess and meshes with the positioning recess to circumferentially position the nut and prevent the nut from circumferential rotation. The remaining positioning flanges are rolled outward under the axial pressure of the bolt rod section, and their ends abut against the outer wall of the thread to axially position the nut and prevent the nut from axial slippage.

6. The anti-loosening bolt assembly with an engaging and abutting structure according to claim 4, characterized in that: A set of matching side plates are provided on the edge of the anti-loosening shell cover, and each matching side plate is bent downwardly to the anti-loosening shell cover and abuts against the outer wall of the nut. The matching side plates position the anti-loosening shell cover to prevent it from circumferentially deflecting on the nut.

7. The anti-loosening bolt assembly with an engaging and abutting structure according to claim 5, characterized in that: The inner diameter of the avoidance opening is larger than the outer diameter of the bolt rod section, and the positioning flange folded outward is inclined inward along the radial direction of the anti-loosening shell cover to enclose and form a conical structure.

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