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Патент USA US2111681

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.ï l ch 22,' 1938.,
F. TURRETTINI
MACHINE To`oL
Filed Jan. 6, 1937
ZÄÜLÖSÈ
2 Sheets-Sheet l
March 22, 193s.
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MACHINE TOOL
' Filed Jan. 6,'1937
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2 sheets-sheet 2
Patented Mar. 22, 19738
2,111,681'
PATENT oFFlcE
2,111,681
MACHINE TOOL
Fernand Turrettini, Bellevue-Geneva, Switzer
land, assigner to firm Societe Genevoise D-’In
struments de Physique, Geneva, Switzerland, a,
iirm of Switzerland
Alppiication January 6, 1937, Serial N0. 119,361
In Switzerland JanuaryV 28, 1936
4 Claims. (Cl. 77-36)
The present invention relates to machine tools
The lever 9 carries a roller I I which rolls on a
and particularly to drilling, boring, milling and raceway I2 provided along a crossbeam I3 on
like machine tools of the type having a slide which is formed the horizontal guideway I4 car
or carriage movable along a horizontal guideway rying the slide I5 and the spindle head I6.
5 and carrying a vertically movable part, such as
When the ratio of the distances between the 5
for example a rotatable tcol spindle. Such ar
axis I0 and the roller II, and between this roller
rangements may be used on radial drilling Ina
and the pulley 8 is suitably selected, a force F
. chines, on vertical milling machines or on jig
will be developed at the point I0 which will bal
bo-ring machines of the portable type.
ance the weight of the slide I5 with its spindle
V10 When the vertically movable parts on such head I6.
Y
10
machines have large dimensions, they are usually
Instead of mounting the roller II on the lever
counterbalanced by a weight suspended on a
chain and disposed behind the horizontal cross
beam along which moves the slide. In this case
V9, this lever could bear on an intermediate mem
ber which would carry one or several rollers mov
ing on the way I2.
the horizontal guideway has to bear the weight
of the vertically movable spindle, of the slide,
»ported in a carriage having a cradle-shaped Y
and of the counterweight. ' This considerable
member Il and two downwardly extending flaps
weight acting on the horizontal guideway is
prejudicial for the easy movability of the slide
20 and causes increased wear of the guideway.
The object of the invention is to utilize the
weight of the counterweight to partially relieve
the horizontal guideway from the weight oi the
movable parts.
According to the invention the counterweight
25
is carried by a lever pivotally connected to the
horizontally movable slide or carriage and bear
ing on one or several rollers capable of rolling
on a way provided along the beam carrying the
30 horizontal slide, the reaction of the counterweight
on the pivot of the lever acting to relieve the
horizontal guideway from a partY at least of the
Weight of the horizontally movable slide.
The accompanying drawings illustrate by way
35 of example a form of construction of the inven
tion and a modiñoation thereof.
Figure 1 is a fragmentary vertical section of a
boring machine embodying the subject of the
invention.
40
Figure 2 is a horizontal section along the line
2_2 of Fig. 1.
Figures 3 and Llare similar vertical and hori
zontal sections, respectively, of a modification of
the invention.
45
The represented machine comprises a boring
spindle I mounted in a quill 2, the weight of these
two parts being sustained by a counterweight 3
attached to the quill 2 by means of a chain éi.
This chain passes over two pulleys 'I and 8, the
50 iirst one being journalled concentrically to the
articulation I0 of a lever 9, and the second being
carried by the free end of the lever 9; The
pulley 'I could however be disposed otherwise.
The articulation I0 of the lever is carriedby the
55 horizontally movable spindle head I6.
As shown in Figs. 3 and 4, the lever 9 is sup- l5
I3 which carry two rollers I9 movable along the
raceway I2 of the cross beam I3.
I claim:
l. In a machine tool the combination with a
crossbeam having a horizontal guideway and a
slide movable therealong, oi a vertically movable
member carried by said slide, a counterweight
adapted to balance the weight of said vertically 25 '
movable member, a suspension member connect
ing the counterweight to said verticallymovable
member, a lever having one end hingedly con
nected to said horizontally movable slide, the
other end of the lever supporting the suspension 30
member of said counterweight, and a roller sup
porting said lever at a point intermediate the
ends thereof, said crossbeam being provided with
a surface forming a raceway for said roller,
whereby the reactionof the counterweight on the 35
hinge connection of the lever will relieve the
horizontal guideway from a part at least of the
weight of said horizontally movable slide.
2. In a machine tool, the combination with a
crossbeam having a horizontal guideway and a 40
slide movable therealong, of a vertically movable
member carried by said slide, a counterweight
adapted to balance the weight of said vertically
movable member, a suspension member connect
ing the counterweight to said vertically mov- 45
able member, a lever having one end hingedly
connected to said slide, a pulley carried by said
slide and having its axis of rotation coinciding
with the axis of the hinge connection of said
lever, a second pulley carried by the other free 50
end of the lever, said suspension member passing
over said two pulleys whereby said free end of
the lever supports the weight of said counter
weight, and a roller supporting said lever inter
mediate the two ends thereof, said crossbeam 56
2
2,111,681
being provided with a surface forming a raceway
for said roller, whereby the reaction of the coun
terweight on the hinge connection of the lever
will relieve the horizontal guideway from a part
at least of the weight of said horizontally mov
able slide.
.
crossbeam having a horizontal guideway and a
slide movable thercalong, of a vertically movable
member carried by said slide, a counterweight
adapted to balance the Weight of said vertically
movable member, a suspension member connect
ing the counterweight to said vertically movable
3. In a machine tool, the combination with a
crossbeam having a horizontal guideway and a
slide movable therealong, of a vertically movable
member carried by said slide, a counterweight
member, a lever having one end hingedly con
adapted to balance the weight of said vertically
movable member, a suspension member connect
said slide and having its axis coinciding with
ing the counterweight to said vertically movable
member, a lever having one end hingedly con
nected to said horizontally movable slide, the
other end of said lever supporting the suspension
member of said counterweight, a carriage sup
porting said lever intermediate the two ends
thereof, said carriage having rollers, and said
crossbeam being provided with a surface form
ing a raceway for said rollers.
4. In a machine tool, the combination with a
nected to said horizontally movable slide, the
other end of the levell being free and extending
rearwardly of the cross beam, a pulley carried by
the axis of the hinge of the lever, a second pulley
carried by the free end of the lever,’said suspen
sion member passing over the two pulleys where
by the Weight of said counterweight acts on the
free end of said lever, a carriage supporting the
lever intermediate the two ends of the lever, said
carriage having rollers, and said crossbeam being
provided with a surface forming a raceway for
the rollers.
FERNAND TURRETTINI.
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