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Патент USA US2372596

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Mmh 27, 1945.
E, w_ WLLER '
2,372,596:
MACHINE FOR GENERATING FINE PITCH AND‘ OTHER GEARS
Filed July 14, 1959
15 Sheets-Sheet l
,March 27, 1945.
E; w, MlLLER
2,372,596
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Filed July 14, 1959
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Filed July 14, 1959 ‘
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March 27, 1945.
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MACHINE FOR GENERATING FINE PITCH ‘AND OTHER GEARS
Filed July 14/1939
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March 27, 1945.
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MACHINE FOR GENERATING’FINE PITCH AND OTHER GEARS
Filed July 14/1939
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March 27, 1945.
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MACHINE FOR GENERATING FINE PITCH AND OTHER GEARS
' Filed July ,14, 1939
15 Sheeis-Sheeté
vMam-ch 27, 1945.
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~MACHINE FOR GENERATING, FINE PITCH AND OTHER GEARS
Filed __J'uly 14, 1959
15 Sheets-Sheet 7
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March 27, 1945.
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Filed‘ July 14, 1939
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March 27, ‘1945.
E.‘ w. MVILLER
2,372,596
MACHINE FOR GENERATING FINE PITCH AND OTHER GEARS
Filed July 14, .1939
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£29.16.‘
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March 27, 1945.
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E_"w. M|L|_ER
2,372,596
MACHINE FOR GENERATING FINE PITCH AND OTHER GEARS
Filed July 14, 1939
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15 Sheets-Sheet 11
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March 2-7, 1945.
E. W.‘MVILLER
’
2,372,596
MA_CHINE FOR GENERATING FINE ‘.P-ITCH AND OTHER GEARS
’
Filed July_'14, 1959 '
15 Sheets-Sheet 12
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March 27, 1945.
2,372,596
E.yw. MILLER
MACHINE FOR GENERATING FINE PITCH AND OTHER GEARS
Fil'ed July 14, 1939
15v Sheets-Sheet 15
I99
March 27, 1945.
5w; NHLLER
‘ 2,372596
MACHINE FOR GENERATING FINE PITCX-j AND OTHER GEARS
Filed July 14; 1959
15 Sheets-Sheet l4
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- 2,372,596.
UNITED STATES PAENT oFncE
MACHINE FOR GENERATING FINE PITCH .
AND OTHER GEES
‘
Edward W. Miller, Spring?eld, Vt., asslgnor to The
Fellows Gear Shape: Company, Spring?eld, Vt.,
a corporation of Vermont
-
Application July 14, 1939, Serial‘ No. 284,416
42 claiins. (Cl. 90--8')
In the drawings referred to,
The present invention is principally concerned
Fig. l is a front-elevation, Fig. 2 a rear elevation,
Fig. 3 a plan View, and Fig. 4 a side elevation as
seen from the right of Figs. 1 and 3, of a complete ,
with machines for cutting by the molding gen
erating process gears of very ?ne pitches. How
ever, many of the principles of the invention are
applicable to‘ the cutting of coarse pitch gears,
machine containing one embodiment of the in
' cams and other articles of similar or analogous
vention;
‘
Fig. 5 is a vertical section of the machine taken
on line 5-5 of Figs. 1, 3 and '7 and shown on a
character, also, wherefore the protection which
I seek is not to be construed as limited to the pro
larger scale;
duction of line pitch gears only. But the main
object I have sought and accomplished is to en»
able gears of extremely ?ne pitches to be gen
erated and out within unusually narrow limits of
accuracy. Gears of the character referred to
are the plnions and gears of watches, and those
which are used in measuring instruments-mo
tion picture cameras and projectors, and other
Fig. 6 is a vertical cross section and partial
elevation of the machine as taken on line 6-3 of
Figs. 3, t and 5;
’
~
.Fig. 6c is a fragmentary elevation of the cutter
' head of this machine showing the adjustment :lor
cutting helical gears of approi'zimately 4&5" ‘.ielin
angle;
Fig. '7 is a vertical cross section taken on line
mechanisms employing small gears and in which
the greatest possible accuracy is highly desir
l-Jl of Fig. 5; r
'
Fig. 813s a sectional plan view taken on line tut; >
able. Such gears have not been inade- with the
desired accuracy of tooth forms and dimensions,
heretofore because of the limitations oi.’ the ma
chines and equipment available up to this time
of Figs. 5 and 7;
Fig. 9 is a horizontal cross section taken on line
®~~9 of Figs. ~22; and 'l;
' '
,
devised a cutter in the form of a rack with teeth
Fig. to is a fragmentary liomcntcl section taken
on line lit-l0 of Fig. 2;
Fig. 11 is a horizontal swtion taken on line
equal to, or exceeding in number, the number of
il-i-ii of Figs. 2 and "7;
for cutting them.
'
In accomplishing the object set forth I have
52-4-2 of Figs. 9 and it;
tiple of that number; such cutter having cutting
line Ill-64 of, Fig. 13 and drawn on a larger scale;
Fig. 15 lsa horizontal section of one form of
the magazine for the blank work pieces taken 0
line 115-45 of Figs. 13 and’ 16;
.
Flg. 16 is, a front elevation of the magazln
shown in Fig. 15;
_ while the work is rotated at equal linear pitch _
Fig. 17 is a cross section of the magazine and
accessory parts taken on line ilk-W of Figs. 15
exactly and accurately correlating the progres
and 16;
V
'
.
Mg, 18 is a plan view of a form of the machine
sive traverse of the cutter with the rotation of
the work piece, to-- the end that the teeth out
in the latter, will have the correct spacing and
thickness. Another feature of the invention con
‘containing other embodiments of certain features
in provisions for adjusting the machine, with
substitution of di?erent cutters, for producing
either‘ spur gear teeth or helical teeth of various
of the invention;
Fig. 19 is a vertical section
on line l9--l 9
of Fig. '18;
t
Y
’
Figs. 20 and 21 are horizontal sections on lines
20-20 and 2i--2l respectively cf Fig.119;
v -
, Fig. 22 is a vertical section on line 22--22 o!
' helix angles. sun another object otthe inven
tion is to shorten the time consumed in changing
Fig.18;
the work, which 1 have accomplished by provid-v 50
ing a magazine adapted to hold a plurality of
blank work pieces, combined with mechanism for
‘
'
,
Fig. 23 is a detail horizontal section on line
"~23 of Fig. 22;
,
1
Y
‘
Figs. 24 and 35 are fragmentary views showing
different‘ forms of work clamping means adapted‘
to be substituted for the work clamping means
; shown in certain of the preceding ?gures;
Fig. 26 is an enlarged detail of the work adapter
Theseand other features of the inventions-are _
- . fully described and explained in the following
shown in Fig. 25;
4’ '
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'
Fig. 27 is a side elevation of- a_ form of the ma.-.
chine showing a variation-of means for. regulat
speci?cation in connection with drawings which
illustrate some of the forms in which the primal
‘ples of the invention may be vembodied, '
‘
on line 88-43 of Figs. 3, t, ‘7 and 9;
Fig. 14 is a detail horizontal section. taken on‘
- line velocity. I have further provided novel
means in a number 0! dliierent embodiments for
.
a
Fig. 13 is a vertical trout to rear section taken
edges at one end of its teeth and the sides of the
teeth being relieved for cutting clearance. with
such cutter I have combined means for recipro
cating it in the direction of they length of its
teeth (which is transverse to the length of the
cutter as a whole), for performing the cutting
action, and means for giving it a progressive geri
eratlng travel lengthwise of the rack as a whole
effecting an automatic delivery of blanks from the
.magazine to‘ the cutting position on the comple
tion of each work piece.
'
li‘igulu is a detail vertical section taken on line
teeth to be out in a given workpiece, or a mul
60
in: the generating traverse of the c'uttinztool-i
2
. 2,872,596
’ it is connected pivotally to the carriage id to
Fig. 28 is a vertical section on line [email protected] of
Fig. 27;
of Fig. 28;
Fig. 30 is a section similar to Fig. 28 showing
turn about the axis of rock shaft 28, having a
sleeve portion 82 which ?ts a bearing 33 in the
carriage and provides a bearing for rock shaft
23. Bolts 35 (Figs. 6 and to) pass through co
still another variation of means for'controlling
axial arcuate slots 35 in the marginal part of the
Fig. 29 is a horizontal section on line 29-29
the traverse of the cutter;
base is into any one of a number of holes 36
’
in the face of the carriage located at equal dis
Fig. 31 is a horizontal section on line 3i—3l
of Fig. 30.
Like reference characters designate the same
parts wherever they occur in all the ?gures.
Referring ?rst to Figs. 5 and 6, the work is
tances from the axis of bearing 33, permitting the
base and guide to be tilted. The cutter head 8
is likewise adjustable with respect to the slide
which carries it, having a centering boss iii. (Fig.
shown at W and the cutter at C. In this instance
the work is a series of disks mounted on a ?anged
5) which ?ts a recess in the slide and being se
cured by bolts 38 entering selected holes in the
arbor i, but may be a single solidgear blank, as
slide through coaxial arcuate slots in the head.
will be later explained. The arbor is supported
Tilting of the slide enables the cutter to be recip»
rocated in a path conforming to the helix angle
of any helical gear, and the drive through the
gear 30 and rack 3! is equally effective regardless
by an adapter 2 held by the upper end of a tubu
lar work spindle 3 which rotates in a bearing
sleeve :3 in the machine base 5. The upper end
of the arbor is centered, and the work is clamped
against the adapter, by an arbor support t hav
of the inclination to which the slide is tilted.
The cutter head may-be tilted at an equal and
ing a rotative bearing in an arm I mounted on
opposite angle'with respect to the slide, whereby
to maintain the cutter in a plane perpendicular
to the axis of the work, or approximately so, and
work in a manner later described.
The cutter is a bar of an alloy steel suitable 25 thus maintain its relationship with the work ap
the base and operated to clamp and release the
proximately uniform throughout its generating
for metal cutting tools having cutting teeth in a
traverse. When cutting helical gears, a rack
line along one edge. Such teeth are similar to
type cutter such as that shown at C’ in Fig. 6a,
rack teeth in their alinement and outlines at the
having teeth at an inclination equal to that of
cutting end, but their sides are tapered inward
from the cutting end to avoid rubbing in the 30 the cutter head slide is substituted for the spur
gear cutter C shown in other ?gures.
course of their cutting strokes. The cutter is >
Backing'o? of the cutter and return to the
detachably secured by bolts to a cutter head 8,
cutting path are e?ected by a cam 39 on thev
which in turn is secured to a slide 9 mounted to
crank shaft 20 and coacting springs 65 and 116.
slide in an undercut guideway ill (see Fig. it)
in the forward side of a shiftable holder H which 35 The-cam operates a bell crank lever 40 to which
is connected a rod 4| projecting toward the
is connected by means of a pivot rod H to a plate
l3, which for the purposes of this description
holder H and engaging a wear piece 82 therein.
The cam through this linkage forces the holder
may be called the cutter head base, secured to
the front wall of the cutter carriage 14.
H outwardly until stop shoulders 43 thereon
(Fig. 14) engage abutments 44 on the base it‘.
Where, as in this illustration, the work is
Said stop shoulders are lugs or ?anges project
mounted with its axis vertical, the cutter is recip
rocated up and down in a vertical plane, 1. e., a
ing laterally from the‘ side edges of the holder
plane parallel ,to said axis, wherein its path may
I I, and the abutments 44 are pieces bolted to the
be either vertical or inclined, -(which path, in
outer face of the base l3 near the lower end of
either case, is transverse to the length of the 45 the holder i l, located and formed to overlap the
cutter bar), and the guideway I0 is arranged to
shoulders 43. Spring 45 reacts between base it
permitsuch movement. ‘The pivot I2 is per
and the head of a stud secured to the holder,
tending constantly to retract the cutter; and
pendicular, or at least transverse, to the direc
tion of the guideway and is provided to permit - spring 46 reacts between lever 40 and a stationary
backing o? ‘of the cutter from the work on the 60 part of the carriage structure, causing the lever
and transmission rod to recede when permitted
return strokes. A spring l5 between‘ a bracket
by the cam 39.
IS on the cutter head base and an abutment H
The cutter carriage I4 is mounted on a slide
41 which is supported on the base 5. ,The car
Reciprocating movement is imparted to the 55 riage I4 has a rib 48 slidingly fitting a guideway
in the slide extending perpendicular to the length
cutter head slide by the following means. A mo
dimension of the cutter, and a micrometer screw
tor l9, herein called the cutter driver, drives a
48 is mounted rotatably in the slide in mesh with
crank shaft 20 through a belt and pulley drive
a nut 50 in the carriage for locating the cutter
2|, 22, 23. A crank pin 24 on the end of shaft 20
(see also Fig. '7) is coupled to a connecting rod 60 at the correct ‘distance from the axis of the work
piece. Any one of various means may be used
25 having a screw threaded part engaged adjust
for indicating and determining the position of
ably with a rack 26. Said rack meshes with a
the cutter, one such means being illustrated in
gear 21. on a rock shaft 28 and ?ts slidingly in
on a rod I8 secured to the slide 9 counterbalances
the weight of the slide.
~
,
r a guide 29 having pivotal engagement with the
rock shaft. Shaft 28 has on its forward end a
gear 30 projecting into a recess in the rear side
of the slide 9 and meshing with a rack 3| se
cured to the slide in a line parallel to the guide
way III. Hence as the crank pin rotates, the
gear to is oscillated and the slide carrying the 70
cutter is reciprocated in the path established by
Fig. 5 as a scale of graduations 5| on the head
of the adjusting screw 48 coacting with a sta
tionary index on the base.
Generation of tooth forms in the work by the
process according to which this machine operates
requires that the cutter be moved lengthwise in a
path parallel to the pitch line of its teeth at a
rate exactly equal to the linear movement of the
- >
cooperating Ditch circle of the simultaneously
rotating work piece. To permit of such travel,
Such path‘ is parallel to the axis of the work
piece in cutting ‘spur gears. But it may be in
the slide 41 is supported on tracks 52 and 53 on
cllned at any angle, for which purpose the base 7' the hue. having roller: ‘4 and I‘ which re” 011
the guideway.
.
'
3
2,872,596
_ said tracks; and it is guided by a rib- 08, secured
to the base parallel to the prescribed path of
movement, which is embraced by two pairs of
rollers 51 on the slide (Figs. 5,7 and 8). The
track 53, which is situated near the cutter, is
Y undercut and a roller 58 on the carriage extends
under it to hold the slide and carriage ?rm
against the reaction of the ‘cutter, which cuts
correlation of the pitch line velocities of cutter
and‘ work. The‘ transmission mechanism in the
base is massive and rigid, and both the wedge
carriage‘ and the slide on which the cutter car
riage is mounted are accurately guided by non
yielding means. Hence the movements of the
cutter between di?erent points of its cycle of
movements are smooth, even and regular. The
rack type of cutter can be made with ?ner teeth
prevented from being lifted away from the slide 10 than cutters of other types and within closer
limits of accuracy in the fine pitches. I have
at such times by clamp bars 59 which are forcedv
found it feasible to make accurate cutters with
by bolts 00 to clamp the ?anges 6I_ of the car
riage against the underlying portions of the slide. . teeth” finer than 150 dlametral pitch and ap—
preaching ‘200 pitch. The type of cutter together
Such clamp bars also assist the adjusting screw
with the means by which it is traversed co
40 in maintaining the cutter at the prescribed‘
operate to generate fine teeth by the molding
distance from the work axis. _
v
y
process, a result which has‘ never been accom
The drive for moving slide 41 and ‘rotating
plished heretofore in connection with gears of
work spindle 3 is taken from a motor 62 in the
such fine pitches, and such gears are produced
_ base, which may be called the feed motor. This
motor drives, by means of a sprocket 80 and .30. with an accuracy of spacing, form- and dimen
sions never heretofore obtained.
I
chain 64, a sprocket 65 on shaft 06. Shaft 06 is
Other means than the wedge bar carriage and
coupled by clutch elements 81 and 88 (see also
wedge bar may be employed for imparting gen
2, 9, 10 and 11) with an alined shaft 80
erating travel of the cutter. One such alternative
connected by change gears 10 and ‘II with a shaft
during its downward stroke. The carriage I4 is
'12 which carries a worm ‘l3 meshing with a worm
wheel ‘H on the work spindle 3.
.
means is shown in Figs. 18-21 inclusive. Here a.
, cam 96 having an acting surface of involute cur
on a short shaft 'l'labove it, which shaft also
vature is supported to rotate in a horizontal plane
above the base in contact with an abutment 91
singing on abutment 04 on the slide l‘l.v Carriage‘
to the extent of its angular movement.
A gear ‘IS on shaft‘ '12 meshes with a gear ‘I0
' carried by the slide 47 on a pivot stud 98. The
carrles a gear 10 meshing with a gear ‘IS on a
screw shaft 80. -The threaded part of the screw 30 cam is rotated in harmony with the work spindle
by mechanism later described, and transmits
shafts ?ts in a nut 0|. connected with a carriage
linear movement to the carriage 41 proportional
82 on which is mounted a bar 03 (Fig. 8) on
82 travels in a path transverse to that of slide
1 4'! and the bar 183 may be set at various angles
to the path of its travel, whereby movement of
the, carriage causes the slide to travel at a rate
- proportional to the tangent of the angle at which
thebarisset.
The proportional rate of the carriage move
. ment may be altered byturning the abutment
about the center of pivot .93. so as to alter the
angle of its plane abutment face 39 to the dime
' tlon of movement of the carriage. . Setting of the
‘abutmentface to a prescribed inclination may be
.
i.
For convenient de?nition the‘ bar 83 may be 40 effected by inserting gauge blocks between a pin
I00 mounted on a bracket‘l0l (which forms part
called a wedge or cam bar because it acts as a
of the carriage) and a pin I02 on an extension
wedge or cam, and the carriage 82 the wedgebar
arm I03 of the block. Adjusting screws I04 and
carriage or slide. This carriage is supported and
I05 in the bracket I0! and a second bracket I00
guided ‘in a ?xed path by a trackv 80 secured to
respectively
serve to shift the abutment and se
45
the machine base, and the margins. of the track '
cure it in its different positions of adjustment.
are engaged On both upper and lower sides by
The‘ involute cam and abutment 91 form in
rollers 08 and 01, while its bounding edges are
effect
one tooth of afrack and pinion couple. If.
embraced by rollers 80. all of said rollers being 1 '
mounted on the carriage. The pivotal connection
of the ‘wedge bar with its carriage is made near
[one of its ends by a stud". It issecured-at.
various angularitiesrby a bolt 00 of which the
headoccupies an undercutarcuate ‘slot 0| in the
carriage. 82 concentric with the pivot 00. The
abutment Il-is'a block connected-to slide 01 by a!v
the abutment face is perpendicular to the path
of the slide, the slide is moved at the same linear
rate as the base circle of the involute, but when
r the ‘abutment is inclined '(by counter-clockwise
rotation with reference to Fig. 20), the cam then
moves the slide with thelinear velocity of a pitch
circle larger than the .base circle;
In the main, the machine shown in Figs. 19-21
stud 02 (Fig. ‘TL-on which ‘it has a'pivotal
is like that first described, but it has a somewhat
mounting. A weight 03. connected- to the slide
different transmission mechanism, with allarger
41 by a tape or cord 04 passing over a. guide
number of changeable gears, for rotating the cam
> pulley‘ 0! holds the abutment against‘ the wedge
and work spindle. It also exhibits a modi?cation
bar and causes the carriage tov move in, one direc- ,
of the means for mounting the cutter head and
'tion when the‘ wedge bar is ‘withdrawn, as well
controlling the relief and return movements of
as permits the marriage to move in the other f
7 cutter. Parts which are substantially iden
direction by the pressure action of the wedge bar - the
tical in the two forms of machine are designated
in advancing. v'I'hegcaifs''ll'and ‘I0. as well as 10 '
‘by the same reference characters, while similar
.and ‘II, are changeable. ,7 Substitution . for one
parts are designated'by the same characters modi
in .
another ot'gear pairs'having different’ ratios,
connection enable
‘with angular
the traveladjustments‘
of the cutteroftothe
be
fled by exponents.
'
'
~
'
The cam is secured tea shaft 101 (Fig. 21) '
wedge bar,
‘
V
which is driven from a feed motor corresponding
correlated with work gears of all diameters with
the motor I! by a chain engaging the sprocket .
in theme‘ ofthe machine.» Due to the wedge 70 to
"a which, through a train of change gears shown
‘ bar. this may be accomplished withfuscof a rela
collectively at I00, drives a shaft'tsa coupled by '
tivelr small. number .Of different gear pairs.
semen 01a with a shaft 12a. The latter-is
It will be seen that the mechanism herein do
coupled by a train of change gears shown at I"
scribed effects a uniform» rate of ‘travel 'of the
with a shaft III,v carrying a-worm III in mesh
and
a‘
very
exact
78
~ cum!‘ tahicntially oithe ‘work
41,.
2,872,598
with a worm wheel l l2 secured to shaft llil. The
shaft 120, drives, through a pinion and crown gear
couple‘ l l3, a worm ‘ltd meshing with the worm
wheel ‘M on the work spindle.
Returning to the cutter of this machine, the
cutter head 8 is secured to a plate lla pivoted
by means of a pin l2a between lugs Ilt (Fig. 18)
on the slide to which has a sliding engagement
with the bed, l3 by interlocking undercut guides.
The rod ll la for controlling the backing off move 10
ment of the cutter is located in the tubular rock
shaft 28a and carries an anti-friction roll l l5 en
gaging an inserted wear piece @321; secured to the
plate l Ia by a threaded stud and nut as shown. 0
porting bearing I323. The shaft ‘F20 which drives
the work spindle through worm and wheel gear
ing as previously described, is coupled with a
shaft Hill by changeable gears I58, I49.
Shaft
l?'l' carries one member 856 of differential gear
ing, the other members of which are- a gear li‘il
on a shaft l'52 in line with shaft Ml, and inter
mediate gears lbs and H54 in a rotatable carrier
use. Shaft E52 is connected with the shaft of
screw 86a by changeable gears I56 and lb'l.
The gear carrier I55 is provided with worm
gear teeth lat meshing with a worm liilll which
is driven by shaft ‘Me by a gear pair ltd, shaft
l?l and a train of changeable gears l62, Hi3, ltd
and l?t. By rotating the carrier l55, a speed
A further alternative means for traversing the
differential is introduced in the drive from shaft
cutter is shown in Figs. 27, 28 and 29. Here the
it? to shaft I52, which can be varied by sub
slide Illa supporting the cutter carriage M is pro
stitutions in the gear train lGZ-I'SE. When any
pelled directly by a screw 80a which extends in
of the gears of this train is removed, the carrier
the direction of carriage travel and is driven from‘
the shaft 121) through a gear train llb, ll‘l, lld, 20 is held stationary by worm I59. The incremental
movement which may be thus imparted to‘ the
M9, l2ll and l2l; the latter gear being secured to
screw supplements the effect of changing the
the screw, and the gears H8, H9, and l is being
other gears to meet all conditions.
mounted on intermediate shafts and being inter
A single machine embodying this invention is
> changeable with others of different ratios. The
shaft "i212 drives the work spindle through a worm 25 capable of producing gears of a wide range of
dimensions from pinions 11s" or less to gears l"
‘l3 and worm wheel ‘id as ?rst described and is
or more in diameter, and of a variety of types
and thickness or length in the axial dimension.
They are cut to ?nished dimensions with great
Screw the engages a nut lZZ on the slide and
is movable endwise in its bearing l23 on the base. 30 rapidity, particularly those of the smaller sizes. .
In order to facilitate changing of the work which,
It is equivalent to a wedge or cam, because, when
if performed manually, would in many instances
rotated, its thread acts with wedging e?fect on the
require more time than the entire cutting cycle,
carriage, wherefore it may be so called. A bell
the machine is provided with a magazine for
crank lever having two arms- H4 and l25 is piv
oted by a stud I26 to the base. Arm l2l‘. is forked 35 holding blanks and automatic means for trans
' itself driven by essentially similar mechanism to
that shown in Figs. 5—l1 for driving the shaft ‘l2.
to embrace the shaft of the screw, and carries pins
l2‘?! projecting between collars l28 on the shaft.
The other arm, I25, of the lever carries a pivoted
block l29 on its extremity entering. a guideway l3ll
in a bar l3l, which likewise is a wedge or cam,
and is pivoted by a stud I32 to the slide Ma and
is adapted to be swung about its pivot from a po
sition parallel to the screw and the path of move
ment of the slide to other positions in which it
is more or less inclined to such path. It may be
set at any prescribed inclination with the aid of
gauge blocks, one of which is shown at I32a in
ferring the blanks. to the work spindle, with
simultaneous ejection of finished work pieces, and
clamping them on the spindle. I willnow de
scribe the embodiment of magazine, work holder
and mechanism for operating them in timed rela
tionship disclosed in the drawings.
~
_
Figs. 15, 16 and 1'1 show the details of one form
of magazine. This is designed to accommodate
gear blanks in the form of thin disks which are
strung on an arbor I having a base ?ange ltt
and a pin l6‘! for preventing rotary shifting of
the disks with respect to one another. This mag
terposed between pins I33 and :34 mounted re-v ' azine is made of separable parts I68 and ltd
secured together by screws I10 and having an
spectively on the end of the bar and on an ad-,
. jacent part of the slide; and may be clamped in 50 internal space of suitable dimensions to receive
the gear blank and arbor assemblages in a row
adjusted position by a screw I35 passing through
side by side. These parts have ribs on one edge
a slot in the slide into threaded engagement with
collectively forming a dovetail I'II which ?ts ad
the bar. As the slide travels, and if the bar I3I
justably, and is clamped, in a groove I12 of a
is inclined, the bell crank lever moves-‘the screw
magazine holder I13 by screws I14. An adjust
endwise more or less, depending on the degree of
ing Lscrew H5 mounted in the holder is provided
inclination of the bar I3I, thus giving an incre
with a ?ange entering 'a groove in the rib Hi
ment of movement to the slide additional to that
to aid in exactly locating the magazine with
imparted by rotation of the screw. When the
guideway in the bar is parallel to the path of the
slide, no such incremental movement is‘impa'rted.
The adjustment of the guide bar, together with
vsubstitutions for the changeable gears, enables
the traversing movement of the cutter to be ex
actly correlated with the rotational movement of
' gear blanks of any diameter within the range of
the machine. ~ In other respects the form of the
invention just described is like that first de
scribed.
_The same ultimate effect may likewise be ob
respect to the work spindle.
A pusher I16 is contained slidingly in the slot
or guideway I11 provided between the outer lips
of the two parts of the magazine and is con
nected with a spring metal tape vI18 like the
springs used in- watches and clocks, which ex
tends along the inner wall of the magazine and
around a guide roll I19 to a shaft I" to which
its other end is secured and around which it is
coiled under tension. The effect of the spring is
to move the pusher and advance the blanks to
tained by imparting incremental rotation to the 70 ward and out of the end of the magazine nearest
the work spindle when permitted by withdrawal ‘
screw 80a. A means for doing this is shown in
Figs. 30 and 31, in which the screw is engaged
of blanks. The pusher may be retracted man
with the slide 41a in the manner previously de
ually toward the outer end of the magazine, hav
ing a. projection for engagement by the operator’s
scribed, but is withheld from endwise movement
by collars I45 and I48 embracing its ?xed sup 75 ?nger for that purpose, to permit loading. A -'
2,872,596
retainer IBI is-connected to the discharge end
5
nected with sprocket ll) , chain Mia and sprocket
2M loose on the shaft 209 (Fig. 11) . Two ratchet
wheels 2“! and 2“ are keyed to shaft 209. The
of the magazine by a pivot I82. It has two sepa
rated hooks I83 arranged‘ to embrace the blanks
.and engage the extremities of the arbor i or the
endmost assemblage. The retainer and its books
ratchet wheel 2! l' is connected with a gear 2I2
in mesh with a gear 2 l3 which is keyed to a shaft
2“ (Fig. 9). ., The latter shaft is in line with the
are so located by an adjustable stop screw I84
and opposing spring 185 acting on a lugs" i86
cam shaft but is rotatable independently and is
put in driving connection with it at prescribed
which projects from the retainer between‘ the
times by normally disconnected clutch elements
screw and spring, that the outermost blank is
clear of the magazine but is held ?rmly in en
H5 and H6. The ratchet 210 is connected with
gagement with the hooks by pressure transmitted
a gear element 2i‘! which drives shaft 2 I 4 through
through the other blanks from the pusher. The
a gear 2|8 thereon and an intermediate gear 2E9
engaging edges of the hooks slightly overlap the ' (Fig. 11). Bawls 226 and 228 carried by the
blank arbor l at such a small angle to the path
sprocket 206 coast with the ratchets 210 and
of that end of the magazine in moving toward iii 2H respectively. These pawls andnratchets con-.
and away from the work spindle that they are
stitute overrunning or one way clutches of which
displaced by the arbor against the yielding re
the clutch all-cit drives the shaft 2% when
the sprocket rotates clockwise (with respect to
draws from the work spindle after the latter has ' Fig. 12) and the clutch 228-4“! drives the shaft
taken the blank.
'
20 when the sprocket rotates counter-clockwise.
sistance of spring I85 when the magazine with
Different magazines like or equivalent to that
The feed :motor- is reversible and runs in alter
above described are provided for holding blanks
nately opposite directions to cause gear gener
of different types and dimensions and may be
ation during traverses of the cutter both from ,
mounted interchangeably on the holder W3.
left to right and irom right to left. Due to the
Said magazine holder is mounted on a splined" 25 overrug clutches and the twoo driving trains,
shaft l81,having a divided hub ?tting the shaft
one of which contains one more gear than the
and being clamped on the same attheiproper
other, the shaft tilt is rotated always in the same
height with respect to the worlt spindle by screws
direction.
I88. Said shaft is suitably located, and the mag
The cycle of, the machine comprises traverse azine suitablyv adjusted, to enable the outermost 30 oi’ the cutter in one direction and rotation of
the work spindle through an angle su?icient to
blank to be brought into alinement with the wort:
spindle axis (indicated by the letter A in Fig. 15
, out one gear; arrest of the generating movements
by partial rotation of the shaft.
'
while the worlt is changed; rotation. of the cam
An ejector H39 in the spindle (Figs. 5, d and 22)
shalt ltl to release the ?nished worlr piece and
and the arbor support or clamp ii previously de Si) substitute a new blank; arrest of the can shaft
scribed are operated in time with the movements
and traverse oi the cutter in the opposite direc
of the magazine to release a completed work
tion with corresponding reversed rotation oi the
piece and pick off the blank presented by the
work spindle; stoppage oi’ the reversed gener
magazine.» The ejector is mounted for endwise
atlon; and operation oi the earn shalt to sub
movement within the worlr spindle and work (ill stitute another blank ior the last ?nished work.
piece. The steps or the cycle are e?ected by
adapter ‘.22, and its lower end is engaged ‘by an
operating lever ltd. The arm "l which carries
‘connecting and disconnecting the clutches
the arbor support is. as best shown in Figs. 22
and lieu-2% periormed by a solenoid 222 under
' control oi’ the wedge bar carriage
and 23, attached. to a bracket ldi which is ac»
cured, With provision for adjustment as to height, (iii ‘ The core 22d of the solenoid (Fig. "ll is coupled
by a clamp ltll, on an endwise movable bar. or
by a linh 22d with a. lever 222d pivoted at
to
is coupled by,
shaft ltd. Shaft 5% passes through a guideway
a bracket in the base. Lever
ltd in the base and is engaged with an operating .
' a limit ill? with an arrn
scorn-ed toe. rock
lever ltd. The bracket ldi is ‘also engaged slid
shalt 22b to which also is secured a iorlred arm
ingly with a parallel guide bar lit which is fitted 54 ill) embracing and coupled to the slidable clutch
‘ tightly in a socket Hill and serves to maintain
element till which is spliced to shaft
in the
normal position or these parts, when the solenoid
the alinement of "the arbor support with the work
spindle. Members Hid carried by the bracket, and
is‘ inactive, the core of the solenoid is raised and
the clutch element bl engagcdwith the comple
one of which is adjustable to take up ‘wear and
es mental clutch element, by a spring. The spring
The foregoing description is made with refer
for this nose may be applied to any part of
the its?“
and it is shown diagrammatically
ence to the specific machine embodiment of Figs.
in Fig. 7 as connected between the top. of the
18-23. in the ‘form illustrated in Figs. 1-13, the
looseness, embrace the guide bar.
.
bracket liila and guide bar illtc diner“ slightly
base and lever tilt at the location till.
, in form and position, but in all essential respects mi I ?he clutch. element tit is spliced to shaft tilt
are like the form of Figs. 18-23 and correspond
with the foregoing description.
and is pressed toward the other clutch element
' by a spring 232.
vThe operating levers Hit and tell are actuated -
respectively by cams tilt and llliion a shaft ‘lidl.
Said‘ shaft drives by means of a gear couple 2W2
(Fig. 13) a shaft 203 carrying a cam tilt (Fig.
9), which acts on a lever 205 secured to the
v
magazine carrying shaft it'll. A spring ltd (Fig.
21 is shown as holding the leverv against the
It may be ‘understood without speci?c
cam.
illustration, that suitable springs may be Provided
to ‘supplement gravity in lowering the work
ejector and arbor support.
The cam shaft 2M is driven by the feed motor.
62 by a sprocket 201, (integral or otherwise con 75
It is normally held out of en
easement by a stop 233 having a-wedge surface 334
(Fig. 9).‘ and an arresting shoulder 23b’ coasting
with a pin 2% which projects from the clutch
member ‘BIB. ‘The stopv .253 " is pivoted. to a
bracket ZB'lwhichpermits it to move toward and.
awayirom the clutch member but holds it rigid
against movement parallel to the axis or the
clutch. A springitb (Fig. '7) normally holds the
stop against the side .of the clutch member in ~
the path of the stop pin £33, and returns it there
to after ‘being displaced. A trip 239 is carried
by lever 225 or link 22G (conveniently by the pivot
connecting these parts) beside the stop and is
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