GB693415A - Impact wrench torque control - Google Patents

Impact wrench torque control

Info

Publication number
GB693415A
GB693415A GB2719151A GB2719151A GB693415A GB 693415 A GB693415 A GB 693415A GB 2719151 A GB2719151 A GB 2719151A GB 2719151 A GB2719151 A GB 2719151A GB 693415 A GB693415 A GB 693415A
Authority
GB
United Kingdom
Prior art keywords
spring
spindle
impact
clutch
tool
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
GB2719151A
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.)
Chicago Pneumatic Tool Co LLC
Original Assignee
Chicago Pneumatic Tool Co LLC
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
Priority to US693415XA priority Critical
Application filed by Chicago Pneumatic Tool Co LLC filed Critical Chicago Pneumatic Tool Co LLC
Publication of GB693415A publication Critical patent/GB693415A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • B25B23/1475Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers for impact wrenches or screwdrivers

Abstract

693,415. Screwing-up and unscrewing bolts &c. CHICAGO PNEUMATIC TOOL CO. Nov. 20, 1951 [Jan. 26, 1951], No. 27191/51. Class 83 (iii). [Also in Group XXIV] In an impact wrench, the energy of rebound of the impact means is stored by axial compression of a spring and then released to accelerate the movable members of the impact means so that a hammer blow is delivered, the rebound increasing with each blow by a predetermined amount, until the compression of the spring, corresponding to the required degree of tightness of the bolt or nut being driven, actuates means for stopping the operation of the impact means. The stopping means may control a switch or valve for the electric or pneumatic driving motor or may disengage a clutch in the drive to the impact means. As shown in Fig. 1, the impact means 87 comprises pivoted dogs 91 which deliver blows to projections 94 on the tool head 88 but are rotated into the inoperative position shown in Fig. 11 by surfaces on the driving cam 68, as described in Specification 551,071. Clutch teeth are provided on the rear of the driving cam, and when the tool is pressed on the work against the pressure of a spring 84, these teeth engage with teeth on a sleeve 67 fixed on a spindle 66. A flanged sleeve 75 is engaged with the spindle by balls 80 in V-shaped grooves 79, 81 in both members and is also in sliding engagement with a cage 58 carrying sun-wheels 60 which mesh with a gear 35 formed on the end of the motor shaft and with an internal gear 63. When the impact means begins to impart blows to the tool head the rebound is transmitted back to the spindle 66 and, through the balls 80 and grooves 79, 81, is translated into axial movement of the sleeve 75, which thus compresses a spring 77. The rebounds increase until the spring compression is sufficient to allow the flanged sleeve to contact an arm 55 on a push-rod 52, thus moving a hooked lever 43 out of contact with the corner 50 of a switch trigger 27 and allowing a spring 41 to move a switch lever 40 to cut off the current to the motor. The arm 55 is screwed on the push-rod and its position is adjustable by a screw-driver slot on the pushrod. A fan 36 cools the motor. The tool can be used in either direction of rotation. As shown in Fig. 23, a hammer 139 surrounding the energy-storing spring 142 engages helical grooves 138 on a spindle 115 and has clutch teeth 144 engaging clutch teeth 145 on the anvil 146. Clutch teeth 136 on the spindle are engageable with a clutch 118 which is slidably splined on the shaft 117 of the planetary gear-cage 111 and is floatingly-supported by springs 121, 151 in a position just forward of a latch 123. When the tool is pressed on the work, against the pressure of springs 137, 151, the clutch 118, 136 is engaged and when the work is almost tightened, the hammer 139 begins to rebound and, by reason of its helical engagement with the spindle, to compress the spring 142 at each rebound. As the driving resistance rises, the clutch teeth 144, 146 disengage and the inertia of the hammer causes it to lag behind the accelerating spindle 115 and further compress the spring 142, the energy stored then being released to accelerate the hammer beyond the speed of the spindle and deliver a blow as the teeth 144, 146 re-engage. The rebounds increase until the hammer moves back sufficiently to contact an adjustable arm 128 on a push-rod 127 and cause a fixed arm 126 to release the latch 123 so that the clutch 118 is moved rearwardly by the spring 151 to disengage the drive. On removing the tool from the work, the member 118 is returned to its position just forward of the latch 123. Specification 619,796 also is referred to.
GB2719151A 1951-01-26 1951-11-20 Impact wrench torque control Expired GB693415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US693415XA true 1951-01-26 1951-01-26

Publications (1)

Publication Number Publication Date
GB693415A true GB693415A (en) 1953-07-01

Family

ID=22088319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2719151A Expired GB693415A (en) 1951-01-26 1951-11-20 Impact wrench torque control

Country Status (1)

Country Link
GB (1) GB693415A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139079B (en) * 1957-09-24 1962-10-31 Pressluftwerkzeug Und Maschb I Impact wrench with torque regulator
DE1157168B (en) * 1954-04-26 1963-11-07 Chicago Pneumatic Tool Co Motor-driven rotary impact tool
DE1161816B (en) * 1954-01-25 1964-01-23 Ingersoll Rand Co Motor-driven rotary impact tools, in particular impact wrenches
DE1196587B (en) * 1956-11-15 1965-07-08 Reinhard E Pantleon Rotary impact tool
GB2178680A (en) * 1985-08-09 1987-02-18 Julien Jean Louis Lankry Driving tools for screw-threaded fasteners
DE102011017671A1 (en) * 2011-04-28 2012-10-31 Hilti Aktiengesellschaft Hand tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1161816B (en) * 1954-01-25 1964-01-23 Ingersoll Rand Co Motor-driven rotary impact tools, in particular impact wrenches
DE1157168B (en) * 1954-04-26 1963-11-07 Chicago Pneumatic Tool Co Motor-driven rotary impact tool
DE1196587B (en) * 1956-11-15 1965-07-08 Reinhard E Pantleon Rotary impact tool
DE1139079B (en) * 1957-09-24 1962-10-31 Pressluftwerkzeug Und Maschb I Impact wrench with torque regulator
GB2178680A (en) * 1985-08-09 1987-02-18 Julien Jean Louis Lankry Driving tools for screw-threaded fasteners
DE102011017671A1 (en) * 2011-04-28 2012-10-31 Hilti Aktiengesellschaft Hand tool
US9381626B2 (en) 2011-04-28 2016-07-05 Hilti Aktiengesellschaft Hand-held power tool

Similar Documents

Publication Publication Date Title
US8875969B2 (en) Fastener driving apparatus
US2543979A (en) Impact wrench torque control
US3924692A (en) Fastener driving tool
US3703933A (en) Impact wrench with torque control means
US9555530B2 (en) Fastener driving apparatus
US2717672A (en) Impact wrench torque control
AU2015248119B2 (en) Fastener-driving tool including a driving device
US2684738A (en) Rotary impact tool
US4875528A (en) Torque control actuator
GB1498968A (en) Rotary power tool such as a power wrench
US3331452A (en) Torque wrench
US2784625A (en) Rotary impact tool
GB693415A (en) Impact wrench torque control
US2980218A (en) Torque control for impact tool
US3276524A (en) Drive adapter for torque responsive control
US2160622A (en) Nut runner
GB1226978A (en)
US2808916A (en) Impact wrench
US2725961A (en) Torque control for rotary impact tool
US3349651A (en) Tool for piercing and threading a workpiece
EP3263285B1 (en) Gas spring fastener driver
GB1180771A (en) Improved power-operated impact wrench or screwdriver.
US3006446A (en) Impact tools
US2889902A (en) Deceleration torque limiter for impact tools
US2850128A (en) Rotary impact clutch