US120036A - Improvement in rock-drills - Google Patents

Improvement in rock-drills Download PDF

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Publication number
US120036A
US120036A US120036DA US120036A US 120036 A US120036 A US 120036A US 120036D A US120036D A US 120036DA US 120036 A US120036 A US 120036A
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Prior art keywords
drill
rock
shaft
improvement
drills
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/32—Feeding working-spindles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/17—Rotary driven device adjustable during operation relative to its supporting structure

Definitions

  • Figure 1 represents a vertical longitudinal section of my improved rock-drill, taken on the line 0 c, Fig. 2.
  • Fig. 2 is a vertical transverse section of the same on the line K K, Fig.1.
  • Fig. 3 is a horizontal section of the same on the line 0 70, Fig. 1.
  • Fig. 4 is a lower end view of the drill-shaft.
  • This invention relates to a new machine for revolving and striking the shank of a rock-drill with the object of obtaining an equal amount of effective power to a suitable depth.
  • the invention consists in the improvement of mechanism for elevating the shaft of a rock-drill, as hereinafter fully described and subsequently pointed out in the claim.
  • a in the drawing represents the frame of my improved rock-drill.
  • B is the upper portion of the drill-shaft, made prismatic, and fitted loose through a disk, at, and cog-wheel b.
  • the latter receives rotary motion by another toothed wheel, 01, from the driving-shaft O, which has its bearings in the frame A.
  • the drill shaft is constantly rotated.
  • From the face of the disk at project ears 0, which support pivoted pawls D D, as shown.
  • These pawls have friction-rollers f f at their outer ends, while their inner ends are pointed; The friction-rollers rest on a circular stationary track, 9, and revolve thereon around the axis of the shaft B, as the disk at is being revolved by the same.
  • rollers ff is suspended from a plate, h, another ring or track, 75, of aboutthe same diameter as the track g.
  • the track 1' are two pendent cams, j 7', and the track 9 carries two projeeting cams, l l, as shown.
  • the rollers f are in contact with the edges of the cams j the outer ends of the pawls D are depressed and their inner ends raised against shoulders m m of the drill-shaft. The latter is thereby slightly elevated, so as to clear the drill E from the rock, and then, as the rollers f are in contact with the cams I, dropped again upon the same, having been turned while thus elevated.
  • the strokes imparted to the drill-shaft by means of the weight F are subsequent to every slight elevation of the same by pawls and rather independent of the same; that is to say, the drill-shaft is loosened by beingv slightly raised and lowered, and is then struck by the drop.
  • the machine can be used to drill to a suitable depth by attaching sections to the lower end of the drill-shaft, as may be found necessary.

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

Description

Patented Oct. 17,187]
Improvement in Rock Drills. I
AM, mo ra-unman/wum m in mam/v55- moansl J.'CHAPMAN. No. 120,036
UNITE TATES PATENT OFFICE.
JOHN CHAPMAN, OF AMSTERDAM, NEW YORK.
IMPROVEMENT IN ROCK-DRILLS.
To all whom it'may concern:
Be it known that I, J OHN CHAPMAN, of Amsterdam, in the county of Montgomery and State of New York, have invented a new and useful Improvenient in Rock-Drilling Machine; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference beinghad to the accompanying drawing forming part of this specification.
Figure 1 represents a vertical longitudinal section of my improved rock-drill, taken on the line 0 c, Fig. 2. Fig. 2 is a vertical transverse section of the same on the line K K, Fig.1. Fig. 3 is a horizontal section of the same on the line 0 70, Fig. 1. Fig. 4 is a lower end view of the drill-shaft.
Similar letters of reference indicate corresponding parts.
This invention relates to a new machine for revolving and striking the shank of a rock-drill with the object of obtaining an equal amount of effective power to a suitable depth. The invention consists in the improvement of mechanism for elevating the shaft of a rock-drill, as hereinafter fully described and subsequently pointed out in the claim.
A in the drawing represents the frame of my improved rock-drill. B is the upper portion of the drill-shaft, made prismatic, and fitted loose through a disk, at, and cog-wheel b. The latter receives rotary motion by another toothed wheel, 01, from the driving-shaft O, which has its bearings in the frame A. By this shaft 0 the drill shaft is constantly rotated. From the face of the disk at project ears 0, which support pivoted pawls D D, as shown. These pawls have friction-rollers f f at their outer ends, while their inner ends are pointed; The friction-rollers rest on a circular stationary track, 9, and revolve thereon around the axis of the shaft B, as the disk at is being revolved by the same. Above the rollers ff is suspended from a plate, h, another ring or track, 75, of aboutthe same diameter as the track g. In the track 1' are two pendent cams, j 7', and the track 9 carries two projeeting cams, l l, as shown. Whenever the rollers f are in contact with the edges of the cams j the outer ends of the pawls D are depressed and their inner ends raised against shoulders m m of the drill-shaft. The latter is thereby slightly elevated, so as to clear the drill E from the rock, and then, as the rollers f are in contact with the cams I, dropped again upon the same, having been turned while thus elevated. In this manner the changes of position are efl'ected without undue friction of machinery. When the rollers f are on the cams Z the inner ends of the pawls are lowered quite clear of the drill-shaft, as is clearly shown in Fig. 1. Directly above the drillshaft are on the frame two vertical guides or posts, a a, between which a dropweight, F, is arranged. The same is provided with a projecting finger, 0, which is, at proper intervals, brought in contact with the projecting pins 12 of a rotating wheel, G, that is connected with the drivinggear. Thereby the weight F is raised, and, as the pins 12 leave the finger 0, suddenly dropped upon the drill-shaft, which it strikes with suflicient force to cause the desired descent of the tool.
The strokes imparted to the drill-shaft by means of the weight F are subsequent to every slight elevation of the same by pawls and rather independent of the same; that is to say, the drill-shaft is loosened by beingv slightly raised and lowered, and is then struck by the drop.
The machine can be used to drill to a suitable depth by attaching sections to the lower end of the drill-shaft, as may be found necessary.
Having thus described my invention, I claim as new and desire to secure by Letters Patent- The stationary cam-tracks g Z and :i j, combined,
"as described, with the pawl-rollers f, so that the latter will move on and between the former, as and for the purpose specified.
The above specification of my invention signed by me this 5th day of July, 1871.
JOHN GHAPMAN. Witnesses:
GEO. W. MABEE,
T. B. Mosnm. 124
US120036D Improvement in rock-drills Expired - Lifetime US120036A (en)

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