GB480937A - Improvements in or relating to power driven hand-guided machines - Google Patents

Improvements in or relating to power driven hand-guided machines

Info

Publication number
GB480937A
GB480937A GB23471/37A GB2347137A GB480937A GB 480937 A GB480937 A GB 480937A GB 23471/37 A GB23471/37 A GB 23471/37A GB 2347137 A GB2347137 A GB 2347137A GB 480937 A GB480937 A GB 480937A
Authority
GB
United Kingdom
Prior art keywords
plates
clutch
shaft
springs
drill
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
GB23471/37A
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.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch AG
Robert Bosch GmbH
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 Robert Bosch AG, Robert Bosch GmbH filed Critical Robert Bosch AG
Publication of GB480937A publication Critical patent/GB480937A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/008—Gear boxes, clutches, bearings, feeding mechanisms or like equipment
    • 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
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
    • F16D43/21—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members
    • F16D43/213—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces
    • F16D43/215—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces with flat friction surfaces, e.g. discs
    • F16D43/216—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure with friction members with axially applied torque-limiting friction surfaces with flat friction surfaces, e.g. discs with multiple lamellae
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

480,937. Drilling &c. machines. BOSCH AKT.-GES., R. Aug. 27, 1937, No. 23471. Convention date, Sept. 30, 1936. Addition to 480,899. [Class 83 (iii)] [Also in Groups XXIV and XXXV] In a portable power-driven tool for drilling &c. the clutch described in the parent Specification has the springs mounted near the periphery of the clutch so as to be freely accessible to air cooling over their whole length. The motor casing is in two parts 1, 2 and the short-circuit armature 11 of the motor is secured to a hollow shaft 12 mounted at one end in a bearing in the end plate 7. A spindle 13 passing through the shaft 12 is mounted in bearings in the end plates 2, 7 and is connected by gearing to a drill-spindle arranged at right-angles thereto. A driving member 14 is keyed to the shaft 12 and carries lugs 14b which engage notches in the periphery of clutch plates 16, the alternate clutch plates 17 being notched to a central nut 18 mounted on quick-pitch threads 13a on the driven shaft 13. Axial pressure is applied to the clutch plates by springs 22 surrounding pins 21 which are riveted at one end to a pressure plate 19 and are attached to a ring 23 by pins 25. The springs 22 abut on the ring 23 and press a pressure plate 20 towards the plate 19. Fan blades 20a are provided on the plate 20 to draw air through holes 2b in the casing 2 and direct it over the springs and then through holes 2a, and fan blades 14a on the member 14 draw air through the motor and pass it out through holes 1a in the casing 1. The pressure plates 19, 20 engage opposite sides of the nut 18 through thrust bearings 26 so that if the drill meets excessive resistance the nut will screw along the shaft 13 in one direction or the other, according to its direction of rotation, and carry with it one of the plates so as to free the clutch plates and stop the drive. Bolts 15 passing through the lugs 14b prevent axial motion of one of the plates 19, 20 when the clutch is released. An angle casing on the end of the tool, which supports the drill spindle, also supports a rotatable feed screw in line with the drill.
GB23471/37A 1936-09-30 1937-08-27 Improvements in or relating to power driven hand-guided machines Expired GB480937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE480937X 1936-09-30

Publications (1)

Publication Number Publication Date
GB480937A true GB480937A (en) 1938-03-02

Family

ID=6542603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23471/37A Expired GB480937A (en) 1936-09-30 1937-08-27 Improvements in or relating to power driven hand-guided machines

Country Status (2)

Country Link
FR (1) FR989526A (en)
GB (1) GB480937A (en)

Also Published As

Publication number Publication date
FR989526A (en) 1951-09-17

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