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Патент USA US2055520

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Sept. 29, 1936.
.1_ C;n CURT|$
`
2,055,520
ROCK DRILL
Filed March ll, 1935
i
‘
2 Sheets-Sheet l
î
INVENTOR
’ BY
ATTORNEY
Sept. >29, 1936.
J_ Q_ CURT|S
'
2,055,520
ROCK DR ILL
Filed March ll, 1935
2 Sheets-Sheet 2
BY
ATTORNEY
2,055,520l
Patented~ Sept. 29, 1936
UNITED STATES PATENT NoFIucE
2,055,520
ROCK DRILL
.lohn C. Curtis, Garfield Heights, Ohio, assigner
to The Cleveland Rock Drill Company, Cleve
land, Ohio, a corporation of Ohio
Application March l1, 1935, serai No. 10,492 ~
21 Claims.
This invention relates broadly to rock drills,
but more particularly to‘ feeding mechanism for
One object of this invention is to produce an
improved feeding mechanism for rock drill of
'
Another object of this invention is to produce
an improved rock drillfeeding mechanism in
cluding a power actuated feeding moto-r and
10 connections between the motor and the rock drill
whereby thc’latter is fed toward or away from
the work at a greater rate of speed than that
of the power actuated feeding motor, this mate
rially reducing the length of the feeding mech
anism without affecting the standard feed length
of the rock drill.
`
preferred embodiment of the invention, I9 repre
sents `a wheel supported ~frame having a sub
stantially Uèshaped member II pivotally se
cured thereto by means of connections I2. ` Af
ñxed to the cross arm I3 of the member I I by
means'of a‘clamp I4, there is` a body or housing
I5 carrying `a bolt I6 protruding through Vthe 10
clamp I4 for receiving a nut Il by which the
housing may be locked relatively to the clamp.
The housing I5 is‘formed with an enlarged coun
terbore I8 ldisposed at right angles with the bolt
I6 and adapted to receive one end, hereinafter 15
denoted as the rear end, of a tube I 9.
,
The other
end of the tube, hereinafter‘denoted as the-front
a drill feeding and supporting mechanism ‘in
cluding a collapsible drill guiding frame, where
by the overall length thereof may be reduced
end has disposed therein a front head or bracket
to substantially one half of the possible feed
Another object of this invention is to produce a
feeding and supporting mechanism foruse with
a rock drill of the standard construction.
25A Other objects and advantages more or less
ancillary to the foregoing and the manner in
which the various objects are attained, reside in
>the specific construction and aggroupment of
the elements peculiar to this structure, as will
3 O become apparent from a more complete'examina
tion of this specification, in the claims of which
there are assembled certain specific combina
tions of parts and specific constructions' indic
, ative of the scope and spirit of the invention.
Referring to the drawings, in which like symbols
designate corresponding parts throughout the
several
views;
»
.
»
.
` Fig. 1 is a side elevational view of the assembly
mounted on a wheel'supported frame and show
guiding frame in extended position.
L
i Fig. 3 is a plan View of the assembly shown -in
Fig.
20.
The housing I5 and front head 20 are se
cured in abutting ñuid tight engagement with
the end of the tube by two ldiametrically disposed
side rods 2l , each extending through the body I5
to receive a nut 22, while the front end of each
rod extends through lugs 23 formed integral with
the front head 29. Mounted on that extended 25
portion of each rod,- there is a tube` or sleeve
24 clamped between the lug 23 and across head
25 by means of a nut 26 engaging the outer
threaded front end portion of the rods. On each
of the sleeves 24 is slidably mounted one half por 30
tion 21 of a drill steel centralizer which is con
stantly urged in engagement with the cross head
25 by the Veffort `of a compression spring 28.
Reciprocably mounted within the tube I9, there
is ‘a piston 29 havinga pistonrod 39 rigidly se
cured thereto by a nut 3|. The piston rod 30
isA somewhat longer than the tube "I9 and ex
tends from one side of the piston to the ex
terior of the tube through‘the body or housing
I5. To assure a fluid tight joint about the rod,
the housing I5 is providedwith a stuñing'box 3,2. «
ing the drill guiding in a collapsed position.
, Fig. 2 isa portion of Fig.V 1 showingthe drill
.
lower portion of the mechanism shown in Fig. 5.
Another object ofthis invention is to produce
length ofthe drill."
40
"
Fig. 8 is a view similar to Fig. 7 showing the
Referring to the drawings which illustrate a
rock drill of the mounted drifter type.`
the drifter type.
(o1. Y12in-9)
1.
Welded on the tube I9 in longitudinal Valign
ment- therewith, thereV are two elongated mem
bers 33 extending from near the housing I5 to
ward the front end thereof for a distance sub
. Fig. 4 is an enlarged front elevational view of
stantially equal to two thirds of the length of
the lower end portion of the assembly shown in
-Fig. 2.
Fig. 5 is an enlarged longitudinal sectional view
of the drill feeding and supporting mechanism
v50
ways 34 extending the full length thereof, and
are adapted to slidably receive the guides 35- of
" Fig. 6 is an enlarged cross sectional view taken
in a planeindicated by line 6-6 in Fig. 5.
'
the tube I 9. The upper portion of the side walls
of the shell are also formed with guideways 38
Iembodying the present invention.
‘
Fig. 7 is an enlarged top plan View of the upper
ß
portion
ofthe mechanism shown in Fig. 5.`
..55
45
the tube. These members are formed with guide
a shell 36.
The shell proper is formed of an 50
arcuated body portion 3l somewhat longer than
having slidably mounted therein the correspond
ing guides 39 of a rockdrill motor 49. The 55
2
2,055,520
guides 35 and guideways 38 extend from theV
front end of the shell toward the rear end there
of a distance about equal to two thirds the
length of the shell. 'I'he rear end of the shell
to transmit forward motion to the drilling mo
tor 49 at a greater rate of speed than that of
either the shell or the piston. When the pis
ton 29 is at the end of its forward stroke or
36 is terminated by an apertured lug or connec
tion 4I adapted to receive the screw threaded
end'of the piston rod 39 which is rigidly secured
thereto by a nut 42. Near the lug 4I, each of
the side walls of the shell is formed with a lon
gitudinal slot Y43 adapted to receive a bolt-like
about-positioned as shown in Fig. 5, each end
of the shell extends only slightly over the cor
responding end of the tube III, and the drilling
motor 49 extends only slightly over the front end
of the shell 36, thus constituting an assembly of
a length substantially equal to that of the tube 10
shaft 44 transversely disposed through the shell. I9.
Carrying the shaft 44 for longitudinal movement
When it is desired to feed the drilling motor
within the slot 43, there is a U-shaped strap 45 >rearwardly or away from the work, the throttle
passing over the end of the Vshell inA straddle re
This strap is provided with an
adjustment screw 46 engageable with the end
15 lation therewith.
wall of the shell, the purpose vof which will be
explained later. The shaft is locked against lat
eral movement by a nut 63 mounted on one end
thereof and a head 4‘I formed integral therewith,
the nut’and head engaging the strap 45 as shown
25
in Fig. '7. Toward its front end, the shell 36
has a portion of the arcuated'bottom wall there
of cut away to provide an opening 49. Trans
Vversely. disposed through the'side walls Vof the
shell adjacent this opening and extending there
through, there is a shaft 49 parallel to the shaft
. 44.V This shaft like the shaft 44 is locked against
lateral movement by a head 59 and nut 5I en
30 gaging the side walls of the shell.
_ VThe upper wall of the housing I5 below the
shellY 36> is provided with a series of sprocket
teeth 52 adapted to receive the middle portion
of a chainV 53 which is thereby fastened against
valve may be positioned for admitting motive in '
Y the front end of the tube I 9 through the conduit 15
62. In this instance the motive fluid acting on
the front face of the piston 29 will drive the lat
ter, together with the shell 36, away from the
Work. Since the shell 36 is connected to the
drilling motor 40 through the sprocket wheels 20
and the chain 53, the movement of the shell is
transmitted to >the motor 49 Vat a greater rate
of speed than that of the shell 36 or piston 29.
When the piston reaches the end of its rearward
stroke, the rear end portion of the shell 36 car 25
rying the drilling motor 40 extends well beyond
the rear end of the shell, as shown in Fig. 5. In
this instance, the front end portion of the guides
35 remaining within the guideways 34 for sup
porting the shell, are assisted by the piston Vrod 30
39 protruding from the tube I9.
The'strap 45 carrying the shaft 44 on which
the sprocket wheel 54 is rotatably mounted, may
be moved relatively to the shell 36 for varying
longitudinal movement relative to the tube I9.
the tension of the chain 53, by simply rotating 35
the adjustment screw 46.
chainV 53 extends rearwardly over a sprocket Y
As a result of this present invention it will be
wheel54 rotatably mounted on the shaft 44, and noted that since the front eifective area of the
then forwardly to the cylinder of the drilling mo
piston 29 is larger than the rear effective area,
tor 49, where it is fastened by a chain connecting the power of the feeding mechanism imparting 40
feeding'motion to the drilling motor away from
member 55 rigidly secured within the usual lon
gitudinally apertured lug 56, depending from> the the work is greater than that imparting feeding
From the housing I5, one half portion of the
cylinder.
The other one Y half portion of the
chain 53 extends forwardly from the housing I5,
overa sprocket wheel 571 rotatably mounted on
thel shaft 49, from where it extends rearwardly
_to the drilling motor 40 and is connected there
torby the chain connecting member 55.
v Secured to the side of the tube I9 somewhat
below the housing I5, there is a valve housing 58
having a motive fluid controlling >throttle valve
Y(not shown) rotatable therein rby a handle 59.
motion thereto toward the work.
'I'his advan
tageous feature has been found extremely valu
able for extracting stuck drill steels from a drilled 45
hole. ' Itwill further be noted that by the slidable
arrangement of the shell on the feed tube, an ex
Ytremely simple and compact mechanism is ob
tained without affecting the standard length of
feed'of the drilling motor. '
'
Although the foregoing description is neces
50
sarily of a detailed character, in order to com
The valve housing is provided withva connection
pletely set forth the invention, it is to be under
60 adapted to receive armotive fluid conveying stood that the 'specific terminology is not intended
conduit for admitting motive fluid to the valve. Yto be restrictive or confining and it is to be fur 55
Since the throttle valve and its appurtenant parts , ther understood that various rearrangements of
Vform no part of the present invention, no fur
parts and modification of structural detail may
ther explanation is thought necessary other than be resorted to without departing from the scope or
pointing out that the motive fluid controlled by spirit of the invention as herein claimed.
I claim:
`
`
.
the throttle valve may be admitted in the tube
60
`I9 vthrough a conduit 6I opening therein adja
1. In a drilling apparatus, a shell having a
cent-the housing I5, and a conduit 62 opening drilling motor slidable thereon, a stationary tube
therein adjacent the front head 29.
f
having said shell slidable thereon, a power actu
’ The operation of the mechanism is as follows:
When motive fluid is -admitted- from the throttle
valve' in the rear end portion of the tube I9
through»> the conduit 6|,Vit acts on' the piston
vo
2S and housing I5. Since the latter
with the tube I9 is stationary, the piston
forwardly or toward the front head
causing the forward movement to the
together
is driven
29, thus
shell 36
relative to theY tube I9, due to the piston _rod 39
and lug 4I connecting the shell to the piston.
¿¿ VThe shell 36carrying the sprocket wheels 54 and
'15 5T engaging the chain 53 will cause the latter
ated piston longitudinally movable within said
tube associated with said shell for imparting slid
able movement thereto, and means deriving mo
tion from the slidable movement of said shell for
transmitting feeding motion to said drilling mo
t'or atV a greater rate of speed than that of said
shell.
'
’
70
2. In a drillingapparatus, a shell having a
drilling motor slidable thereon, a feeding mech
anism fol1 said motor comprising a stationary and
a power actuated longitudinally movable element,
said shell being connected to the latter for move 76
3
2,055,520
ment4 therewith relative to said Ystationary ele
said shell with which said flexible member en
ment, and means deriving motion from the move
ment of ysaid shell for transmitting feeding mo
tion to said drilling motor at a different rate of
gages.
‘ 10. In a drilling apparatus,¿a slidable shell, a
speed from that of said shell. l
3. In a drilling apparatus, a stationary elon
gated element, a shell slidable thereon, a power
actuated mechanism associated with said shell
for imparting slidable movement thereto, a drill
10 ing motor slidable on said shell, and means de
riving motion from the movement of said shell for
transmitting feeding motion to said drilling mo
tor at a greater rate of speed than that of said
shell.
>
'
l4. In a drilling apparatus, a slidable shell, a
drilling motor slidably guided thereon, a feeding
mechanism for vsaid motor comprising a duality
ofelements one slidable relatively to the other,
said shell being slidably guided on one of said
20 elements and connected to the other for move
ment therewith, means for effecting the slidable
movement of said last mentioned element and
consequently of said shell, and means responsive
to the slidable movement of said shell for effect
25 ing the slidable movement of said motor relative
to said shell.
5. VIn a drilling apparatus, a stationary element,
a power actuated mechanism within said element,
, a member slidably guided on said element, a drill
30 ing motor slidably guided on said member, a con
nection between said mechanism and member for
imparting movement to the latter, and means de
riving motion from the slidable movement of
said member for effecting relative slidable move
35 ment between the latter and said motor.
6. In a drilling apparatus, a duality of elements
one guided on the other for slidable movement
relative thereto, a drilling motor carried by said
guided element for slidable movement relative
40 thereto, a power actuated mechanism associated
with the guided element for imparting slidable
movement thereto, and means deriving motion
from the slidable movement of said guided ele
ment for transmitting slidable movement to said
45 motor relative to said guided element.
7. In a drilling apparatus, a supporting ele
ment, a member slidably guided on said ele
ment, a drilling motor carried by said member
for slidable movement relative thereto, a power
50 actuated mechanism associated with said member
for imparting slidable movement thereto and
means deriving motion from the slidable move
ment of said member for effecting the slidable
relative movement between the latter and said
55
motor.
8. In a drilling apparatus, a mechanism in
cluding an elongated tubular element having an
elongated member slidably guided thereon, a
drilling motor slidably guided on said elongated
60 member, power actuated means within said tubu
lar element connected to said member for im
parting slidable movement thereto, and move
ment transmitting connections between said
member and said motor for transmitting slidable
65 movement to the latter relative to the former.
9. In a drilling apparatus, a slidable shell, a
drilling motor slidably guided thereon, a feeding
mechanism for said motor comprising a station
ary cylinder having a power actuated piston slid
70 able therein, said shell being slidably guided on
said cylinder and connected to said piston for
movement therewith, and speed multiplying con
nections between said shell and said motor includ
ing a flexible element secured to said cylinder
75 and said motor and rotatable members carried by
drilling motor guided thereon, a power actuated
feeding mechanism for said motor comprising a
stationary and a'movable element,said shell be
ing slidably guided on said stationary element and
connected to said Vmovable element for slidable
movement therewith, and speed multiplying con
nections between said shell and said motor in
cludinga flexible member secured to said sta
tionary element and said motor and rotatable
members carried by said shell with which said
flexible member engages.
11.’In a drilling apparatus, a stationary elon 15
gated element, a> member slidable on said ele
ment, a drilling motor slidable on said member,
a power actuated mechanism associated with said
member for imparting slidable movement there
to, and means associated with said element, said 20
member and said motor for transmitting the slid
able‘movement of said member to said motor at
a rate of speed different from that of said mem
ber.
l12. In a drilling apparatus, a stationary elon
gated element having an elongated member slid
25
able thereon, a drilling motor slidable on said
member, power actuated means within said ele
ment operatively connected to said member for
imparting` slidable movementthereto, and means 30
for transmitting the slidable movement of said
member to said motor at a rate of speed diiferent
from that of said member.
13. In a drilling apparatus, a slidable shell, a
drilling motor slidably guided thereon, a feeding 35
mechanism for said motor comprising a station
ary cylinder having a power actuated piston slid
able therein, said shell being slidably guided on
said cylinder and connected to‘ said piston for
movement therewith, and a chain and sprocket 40
wheel connection between said shell and said
motor whereby the slidable movement of the
former is transmitted tov the latter at a rate of
speed different from that of said shell.
14. In a drilling apparatus, a stationary elon 45
gated element having an elongated member slid
able thereon, a drilling motor carried by said
member capable of slidable motion relative there
to, power actuated means within said element op
eratively associated with said member for impart 50
ing slidable movement thereto, and means actu
ated by virtue of the movement of said member for
causing the slidable motion of said motor rela
tive to said member.
’
15. In a drilling apparatus, a drilling motor, a 55
feeding mechanism therefor including a shell on
which said motor is slidably guided, an elongated
tubular element having said shell slidably guided
thereon, power actuated means within said tu
bular element associated with said shell for im
60
parting feeding motion thereto, and further
means between said shell and said motor for
transmitting the feeding motion of the former to
the latter at a rate of speed different from that
Y of said shell.
65
16. In a drilling apparatus, a drilling motor, a
feeding mechanism therefore including an elon
gated member having a shell slidable thereon, a
movable feeding element associated with said
shell for imparting feeding motion thereto', and 70
means including a flexible draft element opera
tively connecting said shell to said motor for
transmitting the feeding motion of the former to
the latter at a rate of speed different from that of
said shell.
75
4
2,055,520
1’7.,;In _a drilling apparatus, `the combination
with a stationary support, of a shell slidable there
tween said element and said housing, and means
deriving motion from said relative motion for
ton chamber >within said support having a ñuid
transmitting motion to said motor in the same di
rection but at a greater rate of speed than that
actuated- piston reciprocable therein Vand rigidly
of the relative motion aforesaid.
on, of a drilling motor slidable on s_aid shell, arpis
connected to the shell` for imparting feeding mo
I tion thereto, and connecting meansv between said
support and motor deriving motion from said shell
Vfor imparting feeding motion to the motor at a
10 gerater rate of speedthan that of said shell.
18. s In a drilling apparatus, the combination
with a stationary support, of an elongated element
slidable thereon, of a drilling motor slidable on
^ said element, a feeding mechanism for said motor
'
Y
`
20.- In a drilling apparatus, the combination
with a stationary tube having guideways formed
thereon, of an ,elongated member slidably guided
within said guideways, of drilling motor slidably
guided on said member, a. feeding mechanism for
said motor including a power actuated piston slid
able Within said tube rigidly connected to said
member for imparting slidable movement thereto,
and a flexible element fastened to said housing
and motorand co-operating with rotatable means
having a fluid actuated piston slidable therein carried by said member for transmitting the slid
able movement of said member to said motor at a
' and rigidly secured to said element for transmit
l ting slidable movement thereto relative to saidY greater rate of speed than that of said member.
15 including a piston chamber within said support
2i. In a drilling apparatus, the combination
>with a stationary element having a movable ele
Yfrom the slidable movement of _said element for ment slidable thereon, a drilling motor slidably
transmitting slidable movement to `said-motor at a guided on said movable element, a power actuated
piston slidable within said stationary element rig
greater rate of speed than that of said element. ¿
19. In a drilling apparatus, the combination idly connected to said movable element for im
parting slidable movement thereto, and means
25 with a stationary supporting housing, of an elon
deriving motion from said movable element for
gated element slidablethereon, of a drillingrmo
tor slidable on said element', a. feeding mechanism transmitting movement to said drilling motor rel
for said motor including a power actuated piston ative to said movable element.
housing, and movement transmitting means con
20 nected to said support and motorV deriving motion
slidable within said housing and rigidly connected
30 to said element for effecting relative motion be
JOHN C. CURTIS.
30
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