Self-tightening anti-loosening bolt

Abstract

The self-tightening anti-loosening bolt comprises a bolt body, a driving gasket, a fixing pin, a conical plate and a nylon plate, the bolt body sequentially comprises an outer hexagonal part, a sliding part and a threaded part from top to bottom, and the threaded part of the bolt body is provided with a containing cavity penetrating in the radial direction; nylon plates which are symmetrical to each other are arranged on the two sides of the containing cavity, the nylon plates are flush with the threads, a conical plate which is in sliding connection in the axial direction of the bolt body is arranged between the nylon plates, the top of the conical plate is fixedly connected with a driving gasket through a fixing pin, and the driving gasket is in sliding connection to the sliding part of the bolt body in the axial direction; in the screwing bolt tightening process, the driving gasket drives the conical plate to move upwards, the conical plate extrudes the nylon plate to move outwards, the nylon plate is extruded to the position between the bolt and the nut and the position between the bolt and the threaded hole, and therefore self-tightening of the bolt is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-loosening bolts, in particular to a self-tightening anti-loosening bolt. Background Art

[0002] Bolts are a type of fastener consisting of a hexagonal head and a screw. They need to be used in conjunction with nuts or holes with threads on the inside to tighten connections. During the use of mechanical assembly, bolts may loosen due to the vibrations caused by long-term operation of the equipment, which may cause the fastened parts to loosen, affecting the use of the equipment. If the bolts fall off due to loosening, it may cause damage to the equipment or operators. Therefore, a self-tightening anti-loosening bolt is designed to solve the above problems. Utility Model Content

[0003] In view of the shortcomings of the existing anti-loosening bolts, the utility model aims to provide a self-tightening anti-loosening bolt, which has the advantages of self-tensioning during the tightening process and preventing the bolt from loosening.

[0004] To achieve the above-mentioned purpose, a technical solution adopted by the utility model is: a self-tightening anti-loosening bolt, comprising a bolt body, a driving washer, a fixing pin, a conical plate and a nylon plate, wherein the bolt body is composed of an outer hexagonal portion, a sliding portion and a threaded portion from top to bottom, the threaded portion of the bolt body has a placement cavity which penetrates radially, nylon plates which are symmetrical to each other are arranged on both sides of the placement cavity, the nylon plates are flush with the threads, conical plates which are axially slidably connected to the bolt body are arranged between the nylon plates, the top of the conical plate is fixedly connected to the driving washer through a fixing pin, and the driving washer is axially slidably connected to the sliding portion of the bolt body;

[0005] Preferably, the contact surface between the nylon plate and the conical plate is an inclined surface, the nylon plate and the placement cavity are embedded and fixed, and the nylon plate can be squeezed out of the placement cavity when subjected to external force;

[0006] Preferably, one end of the conical plate is a fixed part, and the other end of the conical plate is a conical driving part, the fixed part is fixedly connected to the driving washer through a fixing pin, the conical driving part is in contact with the nylon plate, and when the conical plate moves upward, the nylon plate is squeezed outward by the conical driving part;

[0007] Preferably, the contact surface between the driving washer and the fastener further has a sawtooth groove, and the sawtooth groove is used to increase the friction between the driving washer and the fastener;

[0008] The beneficial effects of the utility model are: 1. During the process of tightening and screwing the bolt, the driving washer drives the conical plate to move upward, and the conical plate squeezes the nylon plate to move outward, so that the nylon plate is squeezed between the bolt and the nut, and between the bolt and the threaded hole, thereby completing the self-tightening of the bolt; 2. By arranging a serrated groove on the contact surface of the driving washer and the fastener, the serrated groove is used to increase the friction between the driving washer and the fastener after the bolt is tightened, thereby increasing the tightening strength of the bolt to prevent it from loosening easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional state structure view of the utility model;

[0010] Figure 2 This is a cross-sectional structural view of the utility model;

[0011] Figure 3 This is a three-dimensional structural view of the drive washer of the utility model. DETAILED DESCRIPTION

[0012] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0013] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0014] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided with", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] See also Figures 1 to 3 , the utility model embodiment includes:

[0016] A self-tightening anti-loosening bolt, comprising a bolt body 1, a driving washer 2, a fixing pin 3, a conical plate 4 and a nylon plate 5, wherein the bolt body 1 is composed of an outer hexagonal portion 11, a sliding portion 12 and a threaded portion 13 from top to bottom, the threaded portion 13 of the bolt body 1 having a placement cavity 14 radially penetrating therethrough, symmetrical nylon plates 5 are arranged on both sides of the placement cavity 14, the nylon plates 5 are flush with the threads, a conical plate 4 axially slidably connected to the bolt body 1 is arranged between the nylon plates 5, the top of the conical plate 4 is fixedly connected to the driving washer 2 through the fixing pin 3, and the driving washer 2 is axially slidably connected to the sliding portion 12 of the bolt body 1;

[0017] The contact surface between the nylon plate 5 and the conical plate 4 is an inclined surface, and the nylon plate 5 is fixedly engaged with the placement cavity 14. When subjected to external force, the nylon plate 5 can be squeezed out of the placement cavity 14.

[0018] One end of the conical plate 4 is a fixing portion 41, and the other end of the conical plate 4 is a conical driving portion 42. The fixing portion 41 is fixedly connected to the driving washer 2 through the fixing pin 3, and the conical driving portion 42 is in contact with the nylon plate 5. When the conical plate 4 moves upward, the conical driving portion 42 squeezes the nylon plate 5 to move outward.

[0019] The contact surface between the driving washer 2 and the fastener also has a sawtooth groove 21, and the sawtooth groove 21 is used to increase the friction between the driving washer 2 and the fastener;

[0020] Through the above settings, in the actual working process, its specific working principle is as follows:

[0021] During the process of tightening the screwing bolt, the driving gasket drives the conical plate 4 to move upward, and the conical plate 4 squeezes the nylon plate 5 to move outward. Since the conical plate 4 contacts the nylon plate 5 through the conical driving part 42, the conical plate 4 squeezes the nylon plate 5 to move outward when the conical plate 4 moves upward, so that the nylon plate 5 is squeezed between the bolt and the nut, and between the bolt and the threaded hole. During the continuous screwing process, the nylon plate 5 completely fills the thread gap between the two, thereby increasing the friction force of the bolt, thereby preventing the bolt from loosening due to vibration.

[0022] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-tightening anti-loosening bolt, characterized in that: It includes a bolt body, a driving washer, a fixing pin, a conical plate and a nylon plate. The bolt body is composed of an external hexagonal portion, a sliding portion and a threaded portion from top to bottom. The threaded portion of the bolt body has a radially penetrating placement cavity. Both sides of the placement cavity are provided with mutually symmetrical nylon plates. The nylon plates are flush with the threads. Conical plates are provided between the nylon plates and are axially slidably connected to the bolt body. The top of the conical plate is fixedly connected to the driving washer by a fixing pin. The driving washer is axially slidably connected to the sliding portion of the bolt body.

2. A self-tightening anti-loosening bolt according to claim 1, characterized in that: The contact surface between the nylon plate and the conical plate is an inclined surface, the nylon plate and the placement cavity are embedded and fixed, and the nylon plate can be squeezed out of the placement cavity when subjected to external force.

3. A self-tightening anti-loosening bolt according to claim 1, characterized in that: One end of the conical plate is a fixed part, and the other end of the conical plate is a conical driving part. The fixed part is fixedly connected to the driving washer through a fixing pin. The conical driving part contacts the nylon plate. When the conical plate moves upward, the conical driving part squeezes the nylon plate to move outward.

4. A self-tightening anti-loosening bolt according to claim 1, characterized in that: The contact surface between the driving washer and the fastener is also provided with a serration groove, and the serration groove is used to increase the friction force between the driving washer and the fastener.

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