GB847888A - Electrically driven percussion drill, particularly for drilling rock, earth and synthetic substances - Google Patents

Electrically driven percussion drill, particularly for drilling rock, earth and synthetic substances

Info

Publication number
GB847888A
GB847888A GB23000/58A GB2300058A GB847888A GB 847888 A GB847888 A GB 847888A GB 23000/58 A GB23000/58 A GB 23000/58A GB 2300058 A GB2300058 A GB 2300058A GB 847888 A GB847888 A GB 847888A
Authority
GB
United Kingdom
Prior art keywords
spindle
teeth
wheel
drill
shaft
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
GB23000/58A
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
Publication of GB847888A publication Critical patent/GB847888A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B25D11/102—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/106—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool cam member and cam follower having the same shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/062—Cam-actuated impulse-driving mechanisms
    • B25D2211/067—Cam-actuated impulse-driving mechanisms wherein the cams are involved in a progressive mutual engagement with increasing pressure of the tool to the working surface

Landscapes

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

Abstract

847,888. Percussive tools. MUTHMANN, F., [trading as MUTHMAN, F. [firm of]]. July 17, 1958 [July 20, 1957], No. 23000/58. Addition to 805,678. Class 124. A percussive drill as described and claimed in the parent Specification has the percussive mechanism and the drive combined to form a unit to be mounted on the driving'motor and the drill spindle is subjected to the action of a spring operating to disengage the teeth on two notched discs. As shown, a drill spindle 5 has a hollow portion 13 supported in a bearing 6 and carries a disc 22 having teeth 24 which engage teeth 25 on a disc 23 fixed to a bush 15, the spindle ending in one half of a dog-clutch. An electric motor has a shaft 7 which drives, through gears 8, 9, 11, a gear 12 on a shaft 14 which carries the second half of the dog clutch and is rotatable in the hollow spindle. The wheel 12 is held by a pin 16 against the bush 15 and the other end of its shaft 14 abuts a helical spring 27 which urges the spindle 5 away from the wheel 12 and so tends to disengage the teeth 24 and 25. An adjusting nut 4 on the front of the casing 2 varies the distance between a thrust bearing 33 and a collar 43 on the nut to vary the amount of engagement of the teeth 24, 25 and thus the force of the blow when the teeth are engaged by pressure of the bit against the work. In a modification, Fig. 4 (not shown), the spindle is supported in bearings before and behind the wheel 12 which is mounted on the spindle and the helical spring is situated between the discs on the spindle and the driving wheel.
GB23000/58A 1957-07-20 1958-07-17 Electrically driven percussion drill, particularly for drilling rock, earth and synthetic substances Expired GB847888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE847888X 1957-07-20

Publications (1)

Publication Number Publication Date
GB847888A true GB847888A (en) 1960-09-14

Family

ID=6775444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23000/58A Expired GB847888A (en) 1957-07-20 1958-07-17 Electrically driven percussion drill, particularly for drilling rock, earth and synthetic substances

Country Status (1)

Country Link
GB (1) GB847888A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034787B1 (en) * 1969-11-14 1975-11-11
EP0051923A1 (en) * 1980-11-11 1982-05-19 Kango Wolf Power Tools Limited Portable power-operated drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034787B1 (en) * 1969-11-14 1975-11-11
EP0051923A1 (en) * 1980-11-11 1982-05-19 Kango Wolf Power Tools Limited Portable power-operated drill

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