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Apparatus for tightening threaded fasteners

A technology for fasteners and joining devices, which is applied in the field of devices for tightening threaded fasteners, can solve problems such as access restrictions, and achieve the effects of increasing safety and reducing wear

Active Publication Date: 2018-03-16
HYTORC DIV UNEX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can result in reduced height and / or depth clearance between the object, the nut, and the exposed end of the bolt or bolt head, which can limit access with conventional limited clearance hydraulic torque wrenches

Method used

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  • Apparatus for tightening threaded fasteners
  • Apparatus for tightening threaded fasteners
  • Apparatus for tightening threaded fasteners

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] Figures 1A-1D Perspective, front, side and rear views of a low clearance face tooth ratchet assembly 100 for a hydraulic torque tool 1 having a cylinder-piston arrangement 10 and a connecting rod drive arrangement 50 are shown.

[0022] Figures 2A-2C Perspective, side and front views of the internal components of the linkage drive 50 of the hydraulic torque tool 1 with the low backlash face tooth ratchet assembly 100 are shown. The face tooth ratchet assembly 100 includes a drive plate 110 having a piston engaging means 112 at a first end 111 and a machined face gear 116 having radial serrations 117 at a second end 115 . The face tooth ratchet assembly 100 also includes a ratchet driver 120 having a machined face gear 122 with corresponding radial serrations 123 at a first end 121 and a threaded fastener engaging means 126 at a second end 125 . The face tooth ratchet assembly 100 is formed between the first and second side plates 51 and 52 of the link drive 50, and m...

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PUM

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Abstract

According to a first aspect of the invention we provide a low clearance face tooth ratchet assembly for link drive means of hydraulic torque tools. The face tooth ratchet assembly includes: a drive plate having piston engagement means at a first end and a machined face gear with radial serrations at a second end; and a ratchet drive having a machined face gear with corresponding radial serrationsat a first end and a threaded fastener engagement means at a second end. Advantageously the low clearance face tooth ratchet assembly minimizes volume and mass of the tool. Only one drive plate is necessary which is tapered from a first end to a second end. Further, side plates of the link drive means are tapered from a first end to a second end. Such geometry minimizes the width of portions of the link drive means making the second end, adjacent the threaded fastener engagement means, substantially thinner than the first end, adjacent the piston engagement means. Higher torque values are transferred in a smaller enclosure via only two parts. Notably no drive and / or reaction pawl is necessary as the teeth of the drive plate and the ratchet drive achieve full facial engagement. The design of the connection coupling is backlash-free, maximizes tool safety, minimizes risk of failures / fatigue from wear, bending, scuffing and cracking, and is suitable for changing forces.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of commonly owned and co-pending U.S. Patent Application No. 62 / 168008, filed May 29, 2015, which is incorporated herein by reference in its entirety , titled "Apparatus for Tightening Threaded Fasteners." [0003] The novel features disclosed in this application improve upon the technology disclosed in U.S. Patent Application No. 13 / 023375, filed February 8, 2011, which is incorporated herein by reference in its entirety. Day, titled "Hydraulic Torque Wrench for Tight Clearance". Background technique [0004] Industrial bolting applications often include threaded fasteners with limited clearance and / or accessibility issues. To tighten and loosen such fasteners, an operator may use a prior art hydraulic torque wrench, which includes an actuator and a ratchet linkage. These two parts can be modular, so they can be connected and disconnected according to the desired use. Such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25B21/00
CPCB25B21/005
Inventor P·克彭赫弗
Owner HYTORC DIV UNEX CORP