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Device for tightening threaded fasteners

A technology for fasteners and tools, applied in the manufacture of tools, motor tools, etc., can solve problems such as access restrictions, and achieve the effect of increasing safety and reducing wear

Active Publication Date: 2021-11-23
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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  • Device for tightening threaded fasteners
  • Device for tightening threaded fasteners
  • Device for tightening threaded fasteners

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] 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.

[0023] 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 present invention, we provide a low backlash face tooth ratchet assembly for a linkage drive of a hydraulic torque tool. The face tooth ratchet assembly includes: a drive plate having a piston engaging device at a first end and a machined face gear at a second end having radial serrations; and a ratchet driver having A machined face gear having corresponding radial serrations at a first end and a threaded fastener engaging means at a second end. Advantageously, the low clearance face tooth ratchet assembly minimizes the bulk and mass of the tool. Only one drive plate is required, which tapers from the first end to the second end. Also, the side panels of the link drive are tapered from the first end to the second end. Such a geometry minimizes the width of the portion of the linkage drive means forming the second end adjacent to the threaded fastener engaging means, which is much smaller than the first end adjacent to the piston engaging means. Higher torque values ​​are transferred in a smaller housing through only two components. In particular no drive and / or reaction pawls are required, since the teeth of the drive plate and ratchet drive achieve sufficient surface engagement. The connection is designed to be backlash free, increasing tool safety, reducing the risk of failure / fatigue due to wear, bending, scratching and cracking, and adaptable to 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". technical field [0004] The invention relates to a device for tightening threaded fasteners. Background technique [0005] 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 par...

Claims

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Application Information

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