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Installation tool for blind fasteners and method for installing fasteners

A technology for installing tools and fasteners, applied in the direction of threaded fasteners, manufacturing tools, motor tools, etc., can solve problems such as damage to the grasping part, and achieve the effect of simple structure and mechanically stable structure

Active Publication Date: 2022-05-24
LISI AEROSPACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this last type, the grip is broken under the application of a predetermined torque

Method used

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  • Installation tool for blind fasteners and method for installing fasteners
  • Installation tool for blind fasteners and method for installing fasteners
  • Installation tool for blind fasteners and method for installing fasteners

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] in the attached figure 1 Among them, the "pull screw" type fastener 10 to which the present invention is applied includes a screw 12 and a sleeve 14 . The screw 12 includes a grip 16 that can be broken during installation of the fastener, a rupture groove 18 , a milling head 20 , a post 22 and a threaded end 26 . The gripping portion 16 includes a first gripping portion 28 having a cylindrical shape, a blocking portion 30 and a second gripping portion 32 having grooves distributed on its outer surface.

[0041] The sleeve 14 includes an enlarged collar 40 for receiving the countersunk head 20 of the screw, and a tubular shaft 42 including a sleeve 48 disposed at the end of the sleeve 14 opposite the collar 40 . The tapping of the screw 12 and the threading of the threaded sleeve 14 are complementary. The tubular shaft 42 includes a deformable area (not shown in the figure), the stiffness of which is lower than that of the other parts, capable of forming spherical prot...

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PUM

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Abstract

The invention relates to a tool (installation tool) for installing in a structure 400 a fastener 10 of the "pull screw" type comprising a destructible grip. The installation tool includes a main body, a first sleeve shaft 220 that is axially movable and rotatable in the main body and can drive the gripping portion, a second sleeve shaft that is axially movable but not rotatable in the main body, and has a Shaft drive. The shaft includes a first flywheel capable of driving the first sleeve to rotate, a second flywheel, and a drive element coaxially arranged around the second flywheel. The driving element cooperates with the second sleeve shaft through a screw connection. The first flywheel drives the first sleeve shaft to rotate in the first rotational direction of the shaft. The second flywheel rotates the drive element in the second rotational direction of the shaft to move the second sleeve shaft axially. Thus, the installation tool is able to pull the fastener to form a bulb on the blind side of the structure, tighten the screw and break the grip in a single operation.

Description

technical field [0001] The present invention relates to a tool for installing blind fasteners in structures. Background technique [0002] What we commonly refer to as a "blind" fastener is a type of fastener that can be deformed in a structure to be assembled by deforming a portion of the fastener on the rear side (accessible or not) of the structure And only on one side, called the front or accessible side, mount the structure to be assembled. Said deformed portion of the fastener deforms radially outward during pulling or tightening, forming a spherical or flower-like protrusion, said deformation being supported on the rear side. Thus, the structure to be assembled is firmly fixed, abutting between the head of the fastener on the front side and the deformed portion on the rear side. [0003] Among the various types of blind fasteners, there is a first type called "pull rivets", which consists of a sleeve and a destructible mandrel attached to one end of the fastener, by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B21/00B25F5/00
CPCB25B21/00B25F5/001F16B19/1054F16B19/1072B21J15/043B21J15/12B21J15/26B21J15/365B25B27/0007B25B23/10B25B23/0035B25B23/147B21J15/045B21J15/105Y10T29/5373B21J15/022B21J15/142B21J15/10B21J15/16
Inventor 让-吕克·莱热奥雷利恩·巴查尔布坎
Owner LISI AEROSPACE
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