US3529513A - Two-speed nut-running tool with tandem motors - Google Patents

Two-speed nut-running tool with tandem motors Download PDF

Info

Publication number
US3529513A
US3529513A US777125A US3529513DA US3529513A US 3529513 A US3529513 A US 3529513A US 777125 A US777125 A US 777125A US 3529513D A US3529513D A US 3529513DA US 3529513 A US3529513 A US 3529513A
Authority
US
United States
Prior art keywords
motor
main motor
speed
torque
auxiliary motor
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 - Lifetime
Application number
US777125A
Other languages
English (en)
Inventor
Lester A Amtsberg
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
Application filed by Chicago Pneumatic Tool Co LLC filed Critical Chicago Pneumatic Tool Co LLC
Application granted granted Critical
Publication of US3529513A publication Critical patent/US3529513A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • 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
    • F16H—GEARING
    • F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
    • F16H39/01—Pneumatic gearing; Gearing working with subatmospheric pressure

Definitions

  • the main motor which is designed to operate faster than the auxiliary motor, is initially permitted by the clutch to overrun the auxiliary motor to deliver an initial torque, less than final torque, to the work until its speed is slowed by the initially produced torque to the speed of the auxiliary motor.
  • the clutch then engages, and the auxiliary motor transmits through the main motor increased torque to the work until a final torque is reached, at which 192/.032, .034, .033; 92/150 I time both motors stall.
  • FIG. I is a longitudinal section through a pneumatically powered two-speed nut-running tool embodying the invention.
  • FIG. 2 is a detail section of the clutch.
  • a nut-running tool having an elongated housing I defined by means of a succession of sections fixed to one another in end-to-end relation.
  • a conventional air-driven rotary main motor 11 of the radially slidable vane type is arranged within the housing in axially aligned tandem relation to a conventional air-driven rotary auxiliary motor 12 of the radially slidable vane type.
  • the output end I3 of the rotor shaft of the main motor has a splined driving connection I4 with a double stage of reduction gearing 15.
  • the output spindle 16 of which has a splined driving connection 17 with a work shaft 18.
  • the work shaft terminates in a squared end 19 carrying a socket 21 adapted for engagement with a threaded fastener such as a bolt or nut.
  • the main motor is designed to deliver to the work a degree of torque which is less than. or a fraction of. the final torque required to bring the work to a predetermined degree of tightness.
  • the rotor shaft 22 of the auxiliary motor has a splined driving connection 23 with reduction gearing 24.
  • the auxiliary motor is designed to operate at a low speed relatively slower than that of the main motor. Its function is to cooperate with the main motor after the latter has delivered an initial degree of torque to the work, less than the required final torque, to increase the torque delivery to the work at a very low speed until the final torque has been delivered.
  • the output spindle 25 of the reduction gearing 24 of the auxiliary motor is coupled by means of a conventional one-way clutch 26 of the free-wheeling or overrunning type to the main motor.
  • An inlet port 28 connects with passages 29. 30 leading to the rotor chamber 31 of the main motor.
  • a second inlet port 27 connects with passages leading to the rotor chamber 32 of the auxiliary motor.
  • Both inlet ports are connectable by means of hose lines (not shown) through a common valve with a common source of live air. Upon application of source air through the valve to both inlet ports. both motors are caused to be separately operated and to run concurrently.
  • the clutch 26 is directionally connected between the motors. It enables the auxiliary motor to drive the main motor when the speed of the main motor is slowed to that of the auxiliary motor; and it permits the main motor to rotate ahead of or at a faster speed than that of the auxiliary motor but does not allow the faster rotating main motor to drive the auxiliary motor.
  • the clutch 26 (FIGS. 1. 2) is of the roller type. It includes a cylindrical casing 33 which is press fitted in a recess of an adapter 34 that is fixed upon the input shaft end 35 of the rotor of the main motor; and'includes the usual ring of rollers 36. which rollers contact the surface of the spindle 25 of the auxiliary motor.
  • the arrangement is such that when the main motor I1 is rotating faster than the spindle 25. the clutch rollers are caused to be rotated about their axes in one direction so as to roll around and relative to the spindle; but when the speed of the main motor is slowed to that of the spindle 25. the spindle transmits a rotative force to the rollers forcing them about their axes in the opposite direction whereby they are caused to engage in the usual manner the spindle 25 with the clutch casing 33. When the spindle is so engaged. the rotation of the auxiliary motor 12 is transmitted through the clutch to the rotor of the main motor.
  • a two-speed nut-runner comprising an air-driven rotary main motor carrying a work shaft adapted for engagement with a threaded fastener. an air-driven rotary auxiliary motor,
  • the main motor in tandem relation, means for feeding operating air separately to both motors so as to cause them to run concurrently in the same direction, the main motor adapted when unloaded to run faster than the auxiliary motor and adapted under a predetermined load to be slowed to the speed of the auxiliary motor.
  • the clutch adapted to free-wheel relative to the auxiliary motor when the main motor is running faster than the latter and adapted to engage the auxiliary motor drivingly with the main motor when the speed of the main motor is slowed to that of the auxiliary motor.
  • a two-speed nut-runner comprising an air-driven rotary main motor, a work spindle drivingly engaged by the main motor adapted for engagement with the work. and air-driven rotary auxiliary motor, an overrunning clutch coupling the auxiliary motor with the main motor, means for effecting pneumatic operation of both motors separately and concur rently in the same direction, the main motor nonnally having an operating speed faster than that of the auxiliary motor, the clutch adapted to allow the main motor to overrun the auxiliary motor when the main motor is caused to run faster than the auxiliary motor. and the clutch being adapted to transmit the rotation of the auxiliary motor to the main motor when the main motor is caused to be slowed to the speed of the auxiliary motor.
  • a two-speed nut-runner having an air-driven rotary main motor adapted for driving engagement with the work, an airdriven auxiliary motor, a one-way clutch coupling the auxiliary motor to the main motor.
  • the clutch adapted to be free running when the main motor is running faster than the auxiliary motor and adapted to be engaged when the speed of the main motor corresponds to that of the auxiltary motor.
  • a method for producing in a threaded fastener final torque at low speed comprising: directionally coupling by means of an overrunning clutch a rotary air-motor having a predetermined normal speed in tandem relation with an auxiliary rotary air-motor having a relatively low speed and a torque producing capacity greater than that of the main motor; providing the main motor with work driving means: providing conduit means for communicating a source of live air separately to both motors to cause them to operate concurrently and in the same direction; and arranging the main motor so that it will have a capacity of torque delivery which is less than a final predetermined torque to be produced in the fastener.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Surgical Instruments (AREA)
US777125A 1968-11-19 1968-11-19 Two-speed nut-running tool with tandem motors Expired - Lifetime US3529513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77712568A 1968-11-19 1968-11-19

Publications (1)

Publication Number Publication Date
US3529513A true US3529513A (en) 1970-09-22

Family

ID=25109358

Family Applications (1)

Application Number Title Priority Date Filing Date
US777125A Expired - Lifetime US3529513A (en) 1968-11-19 1968-11-19 Two-speed nut-running tool with tandem motors

Country Status (3)

Country Link
US (1) US3529513A (enrdf_load_stackoverflow)
DE (1) DE6935330U (enrdf_load_stackoverflow)
GB (1) GB1251276A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686983A (en) * 1970-07-20 1972-08-29 Thor Power Tool Co Torque applying and tension controlling device
US4147219A (en) * 1977-11-21 1979-04-03 Chicago Pneumatic Tool Company Two-speed offset nutrunner
FR2435999A1 (fr) * 1978-09-15 1980-04-11 Schmid & Wezel Tournevis a air comprime avec dispositif commutateur de deconnexion
FR2474372A1 (fr) * 1980-01-25 1981-07-31 Tabard Jean Louis Appareil de vissage
DE3243047A1 (de) * 1981-11-23 1983-05-26 Atlas Copco AB, Nacka Pneumatischer motorschrauber mit zwei motoren
JPS5894976A (ja) * 1981-11-23 1983-06-06 アトラス・コプコ・アクチボラグ ねじ連結部を締付けるための空気作動動力工具
US4403663A (en) * 1981-04-13 1983-09-13 Wolff Manufacturing Company Power-operated torque wrench
JPS58181579A (ja) * 1982-04-14 1983-10-24 ヤマハ発動機株式会社 ネジ等の操作装置
EP0080445A3 (en) * 1981-11-23 1984-07-25 Atlas Copco Aktiebolag Dual motor torque delivering tool
US5005654A (en) * 1988-09-28 1991-04-09 Maruma Jyusharyo Kabushiki Kaisha High torque hydraulic shoe bolt wrench
US6093128A (en) * 1999-03-12 2000-07-25 Ingersoll-Rand Company Ratchet wrench having self-shifting transmission apparatus
US6165096A (en) * 1999-03-12 2000-12-26 Ingersoll-Rand Company Self-shifting transmission apparatus
CN102695588A (zh) * 2009-12-17 2012-09-26 日东精工株式会社 螺纹部件松紧装置

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686983A (en) * 1970-07-20 1972-08-29 Thor Power Tool Co Torque applying and tension controlling device
US4147219A (en) * 1977-11-21 1979-04-03 Chicago Pneumatic Tool Company Two-speed offset nutrunner
FR2435999A1 (fr) * 1978-09-15 1980-04-11 Schmid & Wezel Tournevis a air comprime avec dispositif commutateur de deconnexion
FR2474372A1 (fr) * 1980-01-25 1981-07-31 Tabard Jean Louis Appareil de vissage
US4403663A (en) * 1981-04-13 1983-09-13 Wolff Manufacturing Company Power-operated torque wrench
JPS5894976A (ja) * 1981-11-23 1983-06-06 アトラス・コプコ・アクチボラグ ねじ連結部を締付けるための空気作動動力工具
DE3243047A1 (de) * 1981-11-23 1983-05-26 Atlas Copco AB, Nacka Pneumatischer motorschrauber mit zwei motoren
EP0080445A3 (en) * 1981-11-23 1984-07-25 Atlas Copco Aktiebolag Dual motor torque delivering tool
US4484871A (en) * 1981-11-23 1984-11-27 Atlas Copco Aktiebolag Torque delivering tool with dual motor drive
US4522269A (en) * 1981-11-23 1985-06-11 Atlas Copco Aktiebolag Dual motor torque delivering tool
JPS58181579A (ja) * 1982-04-14 1983-10-24 ヤマハ発動機株式会社 ネジ等の操作装置
US5005654A (en) * 1988-09-28 1991-04-09 Maruma Jyusharyo Kabushiki Kaisha High torque hydraulic shoe bolt wrench
US6093128A (en) * 1999-03-12 2000-07-25 Ingersoll-Rand Company Ratchet wrench having self-shifting transmission apparatus
US6165096A (en) * 1999-03-12 2000-12-26 Ingersoll-Rand Company Self-shifting transmission apparatus
CN102695588A (zh) * 2009-12-17 2012-09-26 日东精工株式会社 螺纹部件松紧装置

Also Published As

Publication number Publication date
GB1251276A (enrdf_load_stackoverflow) 1971-10-27
DE6935330U (de) 1970-04-02

Similar Documents

Publication Publication Date Title
US3529513A (en) Two-speed nut-running tool with tandem motors
US3586115A (en) Two-speed dual drive stall torque nut running tool
US2893278A (en) Multiple stage, predetermined torque release apparatus for tightening threaded fastening elements
US3739659A (en) Automatic speed shift for power tool
US3507173A (en) Two-speed nut-runner having two air motors acting as main and auxiliary drivers of a dual-drive planetary gear system
US6093128A (en) Ratchet wrench having self-shifting transmission apparatus
US2261204A (en) Governor for impact wrenches
US3610343A (en) Nut runner having torque responsive gearshift
US3430521A (en) Power-operated tool having two-speed rotary output
US2683512A (en) Clutch
US3323395A (en) Fastener driving tool
CN202013094U (zh) 一种回转窑的驱动装置
GB1044192A (en) Combined rotary fluid motor and speed reducer for driving dental tools
US2384399A (en) Wrench
US3068973A (en) Rotary impact tool
FR1603777A (en) Dual transmission pipe tong
US1831225A (en) Chuck closing and opening mechanism
GB1375102A (enrdf_load_stackoverflow)
US2841379A (en) Mining apparatus and automatic feed control therefor
US3242996A (en) Low torque screwdriver
GB1145136A (en) A load sharing clutch arrangement for use with a plurality of synchronous electric motors driving a single rotary output member
US3512591A (en) Control for torque producing tool
US4183265A (en) Controlled torque air motor
US2850128A (en) Rotary impact clutch
CN108561466A (zh) 适用于煤矿井下刮板输送机动力部离合制动紧链装置