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Anti-loosening bolt assembly with buckle pin in axial direction of thread

An anti-loosening bolt and axial technology, applied in the direction of threaded fasteners, bolts, screws, etc., can solve the problems of lengthening of pin holes and screw rods, inability to meet the precise control of pre-tightening torque, and unsuitable for repeated use.

Active Publication Date: 2020-06-09
广西国力新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cotter pin anti-loosening assembly also has shortcomings: one is limited by the position of the pin hole, the nut notch and the pin hole must be rotated by a maximum of 60o to be radially aligned, which cannot meet the precise control of the pre-tightening torque or tightening torque; the other is that The disassembled cotter pin is difficult to be completely straight, it is difficult to insert into the pin hole and is easy to break, it is not suitable for repeated use, resulting in waste, and it is inconvenient to prepare a new cotter pin every time it is disassembled; the third is to set the pin hole screw It needs to be relatively lengthened. In order to align the pin hole nut, the fastening position must be adjusted by the thickness of the gasket. In order to fix the cotter pin nut, it is necessary to add a groove part. The anti-loosening setting of the fixing function obviously increases the weight of the fastening components, which does not meet the requirements of aircraft lightweight development

Method used

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  • Anti-loosening bolt assembly with buckle pin in axial direction of thread
  • Anti-loosening bolt assembly with buckle pin in axial direction of thread
  • Anti-loosening bolt assembly with buckle pin in axial direction of thread

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] like figure 1 , figure 2 , image 3 , Figure 4 ,and Image 6 As shown, an anti-loosening bolt assembly with snap-fit ​​pins arranged along the axial direction of the thread, which includes nuts 11 , bolts 21 , and pins 31 that cooperate with each other. The nut 11 is axially provided with a first groove 1101 along the internal thread, the radial depth of the first groove 1101 is preferably equal to the radial height of the thread of the internal thread of the nut 11, and the radial width of the first groove 1101 is preferably The screw rod 2101 of the bolt 21 is provided with a second groove 2102 along the axial direction of the external thread, and the radial depth of the second groove 2102 is preferably equal to the radial height of the thread of the external thread of the screw rod 2101, The second groove 2102 and the first groove 1101 have the same radial width; when the first groove 1101 and the second groove 2102 are radially aligned, they together form a pi...

Embodiment 2

[0093] like figure 1 , figure 2 , Figure 4 ,and Figure 7 As shown, an anti-loosening bolt assembly with snap-fit ​​pins arranged along the axial direction of the thread, which includes nuts 11 , bolts 21 , and pins 31 that cooperate with each other. This embodiment is basically the same as Embodiment 1, except that: (1) the female snap B1c of the nut 11 is not provided with an outlet; (2) the nut 11 is provided with a radial through hole 1102, and the radial through hole 1102 penetrates radially Set at the deepest bottom of the box B1c in the radial direction, the number of radial through holes 1102 and the first groove 1101 are the same and they are radially aligned with each other: (3) The diameter of the radial through hole 1102 is preferably not smaller than that of the first groove 1101 radial width, and the radial through hole 1102 needs to be deepened, and its increased depth is not less than the radial height of the male buckle B1d of the bolt 31: (4) the male bu...

Embodiment 3

[0095] like figure 1 , figure 2 , Figure 5 ,and Figure 8 As shown, an anti-loosening bolt assembly is provided with snap-fit ​​pins along the thread axis, which includes nuts 11 , bolts 21 , and pins 32 that cooperate with each other. This embodiment is basically the same as Embodiment 1, except that: (1) the female snap B1c of the nut 11 is not provided with an outlet; (2) the male snap B2d of the bolt 32 is not provided with an outlet; (3) the outlet of the latch 32 The second straight arm 3202b of the U-shaped elastic arm 3202 is set close to the bottom of the first groove 1101 of the nut 11; (4) The U-shaped elastic arm 3202 of the latch 32 is useful for setting the arm section exposed outside the female buckle B1c The release-assisting protrusion 3202a2 for assisting the buckle release and prying up the latch, the release-assisting protrusion 3202a2 is arranged radially on the outer surface of the part where the extended bending 3202a1 of the first straight arm 3202...

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Abstract

The invention discloses an anti-loosening bolt assembly with a buckle pin in the axial direction of a thread. The anti-loosening bolt assembly comprises a nut, a bolt and a pin which are matched witheach other in the axial direction of the thread, wherein the nut is axially provided with first grooves along an internal thread; a screw rod of the bolt is axially provided with second grooves alongan external thread; the first grooves and the second grooves jointly form a pin groove matched with the pin when the first grooves and the second grooves are radially aligned; and the pin and the nutare provided with mutually matched buckles. According to the anti-loosening bolt assembly, the bolt is prevented from loosening through the pin, and the pin is prevented from loosening through the buckles; and the anti-loosening bolt assembly is simple in structure, reliable in looseness, convenient to install and disassemble, low in cost, light in weight, wide in applicability, and particularly suitable for the aviation field.

Description

technical field [0001] The present invention relates to the technical field of connecting fasteners, and more specifically, the present invention relates to an anti-loosening bolt assembly in which snap pins are arranged along the axial direction of threads. Background technique [0002] In aircraft manufacturing, due to the need to disassemble during maintenance, some structural components need to be connected by threaded fasteners. During the flight of the aircraft, if the threaded fasteners in the vibration environment loosen and fall off, it is very easy to cause safety accidents; this is Threaded fasteners are required to have a reliable anti-loosening function and be easy to disassemble. For a long time, the anti-loosening assembly of cotter pin with slotted nut and hole screw (hereinafter referred to as cotter pin anti-loosening assembly) has been widely used because of its reliable anti-loosening and convenient disassembly. However, the cotter pin anti-loosening ass...

Claims

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Application Information

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IPC IPC(8): F16B39/06F16B37/00
CPCF16B37/00F16B39/06
Inventor 龚作钰
Owner 广西国力新材料技术有限公司
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