GB2429065A - A spanner in which each driving member has a strain guage situtuated in a groove or recess having a force concentrating notch in its wall - Google Patents

A spanner in which each driving member has a strain guage situtuated in a groove or recess having a force concentrating notch in its wall Download PDF

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Publication number
GB2429065A
GB2429065A GB0516490A GB0516490A GB2429065A GB 2429065 A GB2429065 A GB 2429065A GB 0516490 A GB0516490 A GB 0516490A GB 0516490 A GB0516490 A GB 0516490A GB 2429065 A GB2429065 A GB 2429065A
Authority
GB
United Kingdom
Prior art keywords
groove
strain gauges
handle
hand tool
driving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0516490A
Other versions
GB0516490D0 (en
Inventor
Chih-Ching Hsieh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0516490A priority Critical patent/GB2429065A/en
Publication of GB0516490D0 publication Critical patent/GB0516490D0/en
Publication of GB2429065A publication Critical patent/GB2429065A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/04—Spanners; Wrenches with rigid jaws of ring jaw type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/08—Spanners; Wrenches with rigid jaws of open jaw type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/142—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
    • B25B23/1422—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters
    • B25B23/1425—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers torque indicators or adjustable torque limiters by electrical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0042—Force sensors associated with force applying means applying a torque
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

A hand tool with strain gauges comprises a tool body; and the tool body having a handle; each of a front end and a rear end of the handle being extended with respective driving portions; each driving portion having a driving head for driving a screw means; each end of the handle being formed with a groove near a respective one of the driving portion; each groove being formed with at least one notch for concentrating stress forces; at least one side wall of each groove being installed with a strain gauge; the handle being installed with two integrating elements; each integrating element being electrically connected to a respective one of the strain gauges. The hand tool may be a wrench or a compound spanner.

Description

HAND TOOL WITH STRAIN GAUGES
FIELD OF THE INVENTION
The present invention relates to strain gauges on a handle tool, and in particular to a hand tool with strain gauges, wherein the strain gauges are installed at a wall of a groove and the groove is formed with notches so that the strain gauge can have a precise value of the twisting force applied to the handle tool.
BACKGROUND OF THE INVENTION
Current hand tools are arranged with a strain gauge to measure the twisting force applied to the handle tool. In the prior art the sensitivity of the strain gauge is not so sensitive so that derived stresses are not precise and thus users cannot apply proper force according to the values.
As a result, it is possible that the handle tool is destroyed or the screw means cannot be well fixed.
To improve above mentioned defect, a round groove is formed on the handle tool and the strain gauge is installed in the groove so that stresses are concentrated upon the groove and the strain gauge can have precise values. However the stresses concentrate upon the wall of the groove, but the groove is round so that the strain gauge cannot fully sense the twisting force. In fact, the strain gauge is installed at the radial direction of the round groove. Thereby it cannot effectively improve the defect in
the prior art.
In another improvement, USP 5503028, the strain gauge is installed at an outer side of the handle tool although a hole is formed. Thus it still cannot get a precise value.
SUMMARY OF THE IN\/ENTION
Accordingly, the primary ob ccl oF the present invefltiofl is to provide a hand tool with strain gauges, wherein the strain gauges are installed at a wall of a groove and the groove is formed with notches so that the strain gauge can have a precise value of the twisting force applied to the handle tool.
To achieve above objects, the present invention provides a hand tool with strain gauges which comprises a tool body; and the tool body having a handle; each of a front end and a rear end of the handle being extended with respective driving portions; each driving portion having a driving head for driving a screw means; each end of the handle being formed with a groove near a respective one of the driving portion; each groove being formed with at least one notch for concentrating stress forces; at least one side wall of each groove being installed with a strain gauge; the handle being installed with two integrating elements; each integrating element being electrically connected to a respective one of the strain gauges.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic view of the present invention.
Fig. 2 is an elevational view of the present invention.
Fig. 3 is a schematic view showing the operation of the present invention.
Fi t. 4 is an elevutional view of the second em bodiment of the present D invention.
Fig. 5 is an elevational view of the third embodiment of the present invention.
Fig. 6 is an elevationa! view of the fourth embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
In order that those skilled in the art can further understand the present invention, a description will be described in the following in details.
However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, *features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
The present invention relates to a hand tool with strain gauges.
Referring to Figs. Ito 3, the hand tool has a tool body 1. The tool body 1 has a handle 10.
A front end and a rear end of the handle 10 are extended with respective driving portions 20. Each driving portion 20 has a driving head 21 for driving a screw means 3.
Each end of the handle 10 is formed with a groove 11 near a respective one of the driving portion 20. Each of the front end and a rear end of the groove 11 is formed with a notch 12 for guiding stress to concentrate.
One side wall of each groove 11 is installed with a strain gauge 13. The handle 10 is installed with two integrating elements 14. Each integrating element 1 4 is electrically connected to a respective one of the strain gauges 13. Each integrating element 14 has a display IS and an adjusting button 16. When the user drives a screw means 3 by a driving head 21 of the driving portion 20, the strain gauge 13 can suffer from a great stress by the groove 11 and the notches 12. Furthermore, it has a preferred deformation and sensitivity. When a force is applied to the strain gauge 13 to deform, the resistance of the strain gauge 13 will change. The integrating element 14 can determine the twisting force of the driving portion 20 by the deformation of the Strain gauge 13 and the twisting value is displayed on the display 15 of the integrating element 14. The adjusting button 16 serves for adjusting the display unit, setting and calibration.
Referring to Figs. 3, in the present invention,, the driving head 21 of the driving portion 20 at the front end of the tool body 1 is engaged to a screw means. The screw means 3 is driven by applying a force to the handle 10. The tool body 1 will suffer a force from the hand of the user.
The groove 11 can be twisted so that the strain gauge 13 deform with a greater amount. The integrating element 14 can determine the twisting force by the deformation of the strain gauge 13. Thus the sensitivity of the strain gauge 13 is greatly increased. The fault due to wrong twisting force is avoid so as to reduce the destroy of the tool body 1.
Referring to Fig. 4, the second embodiment of the present invention is illustrated. The elements same as the first embodiment will not he described herein. Only the difference of the two embodiments is described. Each of lour sides of the groove 11 is installed with a respective strain gauge 1 3. The four strain gauges I 3 are integrated as a bride circuit SO as to gct a precise value oF the twisting force applied to the tool body 1.
Referring to Fig. 5, the third embodiment of the present invention is illustrated. Those identical to the first embodiment will not be further described herein. A plate 17 is installed in the groove 11. The plate 17 is made of extendable metal or plastics. The strain gauge 13 is placed in the plate 17. When a force is applied to the tool body 1, the strain gauge 13 deforms with the plate 17 so as to increase the sensitivity of the twisting force.
Referring to Fig. 6, the fourth embodiment of the present invention is illustrated. Those identical to the first embodiment will not be further described herein. Only those different are described. The notches 12 of the grooves 11 can be described at the two lateral ends thereof so as to achieve the object of increase the sensitivity.
The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims (7)

  1. WHAT s CLAtMED IS: 1. A hand tool with strain gauges comprising: a tool
    body; and the tool body having a handle; each of a front end and a rear end of the 11 andl c being extended with rcspcctivc driving portions; each driving portion having a driving head for driving a sciew means; each end of the handle being formed with a groove near a respective one of the driving portions; each groove being formed with at least one notch for concentrating stress forces; at least one side wall of each groove being installed with a strain gauge; the handle being installed with two integrating elements; and each integrating element being electrically connected to a respective one of the strain gauges.
  2. 2. The hand tool with strain gauges as claimed in claim 1, wherein each integrating element having a display and an adjusting button.
  3. 3. The hand tool with strain gauges as claimed in claim I, wherein there are four strain gauges at four sides of each groove; the four strain gauges are formed as a bridge circuit so as to get a precise value of a twisting force.
  4. 4. The hand tool with strain gauges as claimed in claim 1, wherein a plate is installed in the groove; and a strain gauge is installed on the plate
  5. 5. The hand tool with strain gauges as claimed in claim I, wherein each of the front end and a rear end of the groove being formed with a notch for concentrating stress force.
  6. 6. The hand tool with strain gauges as claimed in claim 1, wherein each groove is formed with a regular shape.
  7. 7. A hand tool with strain gauges substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB0516490A 2005-08-11 2005-08-11 A spanner in which each driving member has a strain guage situtuated in a groove or recess having a force concentrating notch in its wall Withdrawn GB2429065A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0516490A GB2429065A (en) 2005-08-11 2005-08-11 A spanner in which each driving member has a strain guage situtuated in a groove or recess having a force concentrating notch in its wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0516490A GB2429065A (en) 2005-08-11 2005-08-11 A spanner in which each driving member has a strain guage situtuated in a groove or recess having a force concentrating notch in its wall

Publications (2)

Publication Number Publication Date
GB0516490D0 GB0516490D0 (en) 2005-09-14
GB2429065A true GB2429065A (en) 2007-02-14

Family

ID=34984437

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0516490A Withdrawn GB2429065A (en) 2005-08-11 2005-08-11 A spanner in which each driving member has a strain guage situtuated in a groove or recess having a force concentrating notch in its wall

Country Status (1)

Country Link
GB (1) GB2429065A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101934512B (en) * 2009-06-29 2012-08-29 谢智庆 Turning tool suitable for multi-size boltings

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370008A (en) * 2000-12-06 2002-06-19 Hsieh Chih Ching Method of displaying the torque value of a torque applying tool
US20040261542A1 (en) * 2003-06-25 2004-12-30 Chih-Ching Hsien Electronic torsional tool
DE202005009409U1 (en) * 2005-06-15 2005-11-03 Hsieh, Chih-Ching, Feng-Yuan Hand tool, has hand grip equipped with integrating units, such that integrating units are electrically connected with respective strain gauges, where integrating units determine rotary force exerted by deformation of strain gauges
US7062978B1 (en) * 2005-06-07 2006-06-20 Chih-Ching Hsien Hand tool with strain gauges

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2370008A (en) * 2000-12-06 2002-06-19 Hsieh Chih Ching Method of displaying the torque value of a torque applying tool
US20040261542A1 (en) * 2003-06-25 2004-12-30 Chih-Ching Hsien Electronic torsional tool
US7062978B1 (en) * 2005-06-07 2006-06-20 Chih-Ching Hsien Hand tool with strain gauges
DE202005009409U1 (en) * 2005-06-15 2005-11-03 Hsieh, Chih-Ching, Feng-Yuan Hand tool, has hand grip equipped with integrating units, such that integrating units are electrically connected with respective strain gauges, where integrating units determine rotary force exerted by deformation of strain gauges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101934512B (en) * 2009-06-29 2012-08-29 谢智庆 Turning tool suitable for multi-size boltings

Also Published As

Publication number Publication date
GB0516490D0 (en) 2005-09-14

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)