Anti-loose fastener and cushion block

A technology for loosening fasteners and pads, applied to threaded fasteners, locking fasteners, connecting components, etc., which can solve the problems of increased production costs of fasteners, failure of fastened connections, and increased structure and volume of fasteners And other problems, to achieve the effect of guaranteeing the service life, guaranteeing the anti-loose performance and improving the anti-loose performance

Inactive Publication Date: 2021-07-09
山东蓝泉企业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But in actual use, especially in some noisy environments or equipment that often vibrates during work, the fasteners are very easy to loosen, resulting in failure of the fastened connection, which not only affects the use, but also has certain safety hazards
At present, some fasteners increase the number of nuts that cooperate with the bolts to improve the anti-loosening performance of the fasteners, but the increase of nuts not only increases the production cost of the fasteners, but also increases the structure and The volume, moreover, also increases the difficulty of installing the fastener

Method used

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  • Anti-loose fastener and cushion block
  • Anti-loose fastener and cushion block
  • Anti-loose fastener and cushion block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0058] Embodiment 1: In this embodiment, if Figure 5 and Figure 6 As shown, the screwed body is a nut 3, and the nut 3 includes a nut body 31 and a nut base 32 arranged at one end of the nut body 31, the outer diameter of the nut base 32 is larger than the nut body 31, The surface of the nut base 32 in contact with the spacer 1 is the abutting end surface. In practical applications, a certain method is adopted, such as fixing the bolt 2 relative to the workpiece with a screwdriver, the spacer 1 and the nut 3 are set on the other end of the bolt 2 in turn, and the nut 3 is screwed to perform pre-tightening. After pre-tightening, the spacer 1 1 is squeezed and deformed between the nut 3 and the workpiece, the rebound force of the block 1 acts on the abutting end surface of the nut 3, and the nut rotates and self-retracts to overcome the huge sliding friction force given by the block, so there is no strong external force interference Under this condition, the nut 3 is difficu...

Embodiment approach 2

[0059] Embodiment 2: In this embodiment, the screw-in body is a bolt 2 , and the side where the head of the bolt 2 is in contact with the pad 1 is the abutting end surface. In practical applications, a certain method is adopted, such as fixing the nut 3 relative to the workpiece by a wrench, the pad 1 is sleeved on one end of the head of the bolt 2, and the bolt 2 is screwed in for pre-tightening. After pre-tightening, the pad 1 is in the The workpiece and the head of the bolt 2 are squeezed and deformed, and the resilience of the pad 1 acts on the abutting end surface of the head of the bolt 2. The bolt needs to overcome the huge sliding friction force given by the pad and the pad The clamping force given by the annular side portion 12 of the bolt 1 makes it difficult for the bolt 2 to self-retreat without the interference of a strong external force, which ensures the anti-loosening performance of the anti-loosening fastener.

Embodiment approach

[0060] As a preferred embodiment of the present invention, an adhesive layer is provided on the bottom surface of the spacer 1 . During installation, the adhesive layer on the bottom surface of the pad 1 adheres to the workpiece, which can realize the positioning of the pad 1 and prevent the pad 1 from shifting or rotating with the swivel body when the screw body is rotated, thereby affecting the anti-loosening fastener. Installation can also prevent the anti-loosening fasteners from being pre-tightened and then rotate synchronously with the block 1 to cause self-retreat, further improving the anti-loosening performance of the anti-loosening fasteners.

[0061]As a preferred embodiment of the present invention, the indentation depth of the outer wall of the annular side portion 12 to the inner wall of the annular side portion 12 is selected from 30%-50% of the thickness of the annular side portion 12 .

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Abstract

The invention discloses an anti-loose fastener comprising a screwing body and a cushion block. The cushion block is a non-metal elastic body, the screwing body is provided with an abutting end face perpendicular to the screwing axis of the screwing body, the cushion block is provided with a top face, a bottom face and an annular side portion connected with the top face and the bottom face, and a cushion block through hole penetrating through the top face and the bottom face is formed in the center of the cushion block. The outer side wall of the annular side portion is arranged towards the inner side wall of the annular side portion in a concave mode, first anti-skid parts are formed on the top surface of the cushion block, and second anti-skid parts which can be mutually engaged with the first anti-skid parts are formed on the abutting end face. The invention further discloses the cushion block. The anti-loose fastener and the cushion block have the advantages of being high in anti-loose performance, good in shock absorption effect, simple in structure, low in cost, convenient to install and the like.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to an anti-loosening fastener and a pad. Background technique [0002] Fasteners are a type of mechanical parts that are widely used and standardized in daily life and modern industry. They are most commonly used to fix two or more workpieces. Fasteners are mainly composed of bolts, nuts and pads. With the development of science and technology, the requirements for fasteners are getting higher and higher, especially in the fields of aerospace, high-speed rail, ships and military, etc., the requirements for the connection stability of fasteners are higher. [0003] However, in actual use, especially in some noisy environments or equipment that often vibrates during work, the fasteners are very easy to loosen, resulting in failure of the fastened connection, which not only affects the use, but also poses certain safety hazards. At present, some fasteners increase the number of nut...

Claims

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Application Information

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IPC IPC(8): F16B39/24F16B39/282
CPCF16B39/24F16B39/282
Inventor 亓鹏张晓峰马兰英张晓琪
Owner 山东蓝泉企业发展有限公司
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