GB1492543A - Torque control mechanism for a power tool - Google Patents

Torque control mechanism for a power tool

Info

Publication number
GB1492543A
GB1492543A GB2230774A GB2230774A GB1492543A GB 1492543 A GB1492543 A GB 1492543A GB 2230774 A GB2230774 A GB 2230774A GB 2230774 A GB2230774 A GB 2230774A GB 1492543 A GB1492543 A GB 1492543A
Authority
GB
United Kingdom
Prior art keywords
clutch
torque
plate
acts
slip
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.)
Expired
Application number
GB2230774A
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.)
GKN Screws and Fasteners Ltd
Original Assignee
GKN Screws and Fasteners Ltd
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 GKN Screws and Fasteners Ltd filed Critical GKN Screws and Fasteners Ltd
Priority to GB2230774A priority Critical patent/GB1492543A/en
Publication of GB1492543A publication Critical patent/GB1492543A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
    • F16D7/024—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces
    • F16D7/025—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs
    • F16D7/027—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs with multiple lamellae
    • 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
    • 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
    • B25B23/141—Mechanical overload release couplings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

1492543 Slip Clutches GKN SCREWS & FASTENERS Ltd 6 May 1975 [18 May 1974] 22307/74 Heading F2C [Also in Division B3] In a torque limiting clutch for a power operated tool (e.g. a screwdriver, nut runner or drill) wherein the clutch normally slips when a predetermined torque is exceeded, manual override means 20 or 35 are provided to increase the torque at which the clutch slips. In Fig. 1 the torque transmitted by a multiplate slip clutch 16 between a driving shaft 13 and a workpieoe holder 14 is increased by a lever 20 which acts through a thrust bearing 23 on a reaction plate 18 to increase the loading of a clutch engaging spring 17. The torque at which the clutch normally slips is determined by an adjustable nut 19 against which the reaction plate 18 bears. In Fig. 2 (not shown) an axially slidable part of the tool casing (27) acts through a toggle linkage (28) to move the clutch disc pack axially against the bias of the loading spring (17) and thus increases the load on the disc pack and the torque transmitted thereby. In Fig. 3 a slip clutch 32 is in parallel with a friction clutch 33 which is manually engaged to increase the transmitted torque. The clutch 33 is engaged by axial movement of a part 35 of the tool casing which acts through an inclined surface 37 and balls 38 on the clutch presser plate 39. In Fig. 4 (not shown) a reaction plate (43) of a slip clutch (41) acts additionally as a presser plate for a parallel friction clutch (42). The plate (43) is normally held in a position in which the friction clutch is disengaged but on axial movement of a part (44) of the tool casing, a ball toggle (47) releases the plate 43 which engages the friction clutch. A single spring (17) providing the engaging pressure for both clutches.
GB2230774A 1975-05-06 1975-05-06 Torque control mechanism for a power tool Expired GB1492543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2230774A GB1492543A (en) 1975-05-06 1975-05-06 Torque control mechanism for a power tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2230774A GB1492543A (en) 1975-05-06 1975-05-06 Torque control mechanism for a power tool

Publications (1)

Publication Number Publication Date
GB1492543A true GB1492543A (en) 1977-11-23

Family

ID=10177273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2230774A Expired GB1492543A (en) 1975-05-06 1975-05-06 Torque control mechanism for a power tool

Country Status (1)

Country Link
GB (1) GB1492543A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905303C2 (en) * 1979-02-12 1981-05-27 Contiroll Döpper Schwartz GmbH, 4000 Düsseldorf Non-positive release clutch
GB2158894A (en) * 1984-05-15 1985-11-20 Westinghouse Brake & Signal Actuator comprising electric motor and torque limiting device
WO2008068103A1 (en) * 2006-12-05 2008-06-12 Robert Bosch Gmbh Handheld tool
EP1939475A2 (en) * 2006-10-17 2008-07-02 JLG Industries, Inc. Slip clutch
GB2534876A (en) * 2015-02-02 2016-08-10 Stephenson Gobin Ltd Clutch Apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905303C2 (en) * 1979-02-12 1981-05-27 Contiroll Döpper Schwartz GmbH, 4000 Düsseldorf Non-positive release clutch
GB2158894A (en) * 1984-05-15 1985-11-20 Westinghouse Brake & Signal Actuator comprising electric motor and torque limiting device
EP1939475A2 (en) * 2006-10-17 2008-07-02 JLG Industries, Inc. Slip clutch
EP1939475A3 (en) * 2006-10-17 2010-05-05 JLG Industries, Inc. Slip clutch
US7766750B2 (en) 2006-10-17 2010-08-03 Jlg Industries, Inc. Slip clutch
EP2284412A1 (en) * 2006-10-17 2011-02-16 JLG Industries, Inc. Slip clutch
WO2008068103A1 (en) * 2006-12-05 2008-06-12 Robert Bosch Gmbh Handheld tool
US8083006B2 (en) 2006-12-05 2011-12-27 Robert Bosch Gmbh Hand-held power tool
RU2458780C2 (en) * 2006-12-05 2012-08-20 Роберт Бош Гмбх Hand-held machine
CN101547771B (en) * 2006-12-05 2012-09-05 罗伯特·博世有限公司 Handheld tool
GB2534876A (en) * 2015-02-02 2016-08-10 Stephenson Gobin Ltd Clutch Apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee