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Патент USA US2123769

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July l2, 1938.
J. coTAL.
2,123,769
SPEED -CI’IIÀBIGII‘JG? GEAR
A Original Filed Aug. 13, 1935
2 Sheets-Sheet 1
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July l2, 1938.
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2,123,769
SPEED CHANGING GEAR
Original Filed Aug. 15, 1935
2> Sheets-Sheet 2
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,123,769
Patented july i2, i938
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TESV
2,123,769
SPEED CHANGING GEAR
`Iean Octal, Paris, France
Original application August 13, 1935, Serial No.
36,029. Divided and this application May 17,
1937, Serial No. 143,224. In Great Britain Sep
tember 21, 1934
1 Claim. (Cl. 711-276)
The present invention, which is a division of to the fixed electromagnet il or to the rotating
my copending application 36,029, filed on August electromagnet d.
The planetary pinion carrier i3 of the ñrst gear
13, 1935, relates to speed changing gears. In the
known gears of this type, the connection between set is secured to the orbit gear lé of the second
5 the driving shaft and the engine on one hand gear set. Upon the said planetary pinion carrier Ul
I3 are rotatably mounted the planetary pinions
and the connection between the driven shaft and
2l and 22 which have different diameters but are
the members to be driven on the other hand are
situated at the opposite ends of the speed chang- . secured together, and they engage respectively
the sun-wheel 23 and the orbit gear lll.
ing gear.
The planetary pinion carrier l5 of the second 10
According to the .present invention, the driven
10
shaft of the speed changing gear is adapted to gear set is secured to the driven shaft 5, and it
control directly propelling devices located between
carries the planetary pinions 26 engaging the
the source of power and the gear case. This ap
plication may be advantageous in the case of
sun-wheel l2 and orbit gear ifi.
The driving orbit gear 5 receives the move
ment of the driving shaft I6 through the inter 15
mediary of an auxiliary gear set situated at the
15 certain vehicles having front driving wheels.
A securing device further permits of maintain
ing the stopping of the _driven shaft, independent
ly of al1 electric power, in order to ensure the
. stopping of said shaft in al1 cases.
-
-
In the accompanying drawings are given by
way of example, several embodiments of the in
vention.
Fig. 1 represents, in longitudinal section, .a
gear~box for four forward speeds with electric
l'l _of this set canV be displaced on 'its axis of
rotation by means of the fork I8 of the lever I9.
The arrow f1 corresponds to the operation with 20
forward drive. The arrow f2 corresponds vto the
operation with reverse drive. The intermediate
position represented in the drawing corresponds
to the neutral position or idle position.
The
control, and adapted to. actuate, on direct drive,
planetary pinion carrier ll carries the planetary 25
pinions 25 in engagement with the orbit gear 5
wheels or propelling means situated between the
and also with the sun-wheel 26 secured to the
25 control and for reverse drive with mechanical
driving element and the speed-changing box.
Fig. 1B is a partial section of the device which
30 maintains the driven shaft of Fig. 1 stationary,
but in a position different from the one shown
in Fig. 1.
Figs. 2 and 3 are front and side views showing.,
a modification of the box represented in Fig. 1.
Fig. 4 represents a box- for two forward speeds
35
and reverse drive, with electric control, also
adapted to actuate wheels or propelling means
situated between the driving element and the
gear-box.
40
front in the casing; the planetary pinion carrier
Fig. 4n is a partial section of the device which
maintains the driven shaft of Fig. 4 stationary,
but in a position different from the one shop/n
' in Fig. 4.
The apparatus represented in Fig. 1 consists of
45 two planetary sets which are controlled by elec
tromagnets 1,2, 3, d.
The rotatable electromagnet l is secured to a,
driving sun-wheel 5. The rotatable electromag
net fi is secured to the driven shaft 6. The fixed
50 electromagnet 2 and the fixed electromagnet 3
are secured to the casing il. An armature 9, se
cured to the loose sun-wheel 23 maybe coupled
' either to the rotating electromagnet I or to the
ñxed electromagnet 2. Another armature Il, se
55 cured to the sun-wheel 12,»may be coupled either
driving shaft i6.
The driving shaft I6 traverses the whole ap
paratus, and may thus be actuated by the engine 30
on the side next the projecting part of the driven
shaft 6.
In this case the driven shaft 6 may act
directly through worm gear, pinions or like means,
upon the parts to be actuated, such as the shaft 28.
The fork I8 is pushed according to the arrow
f1 in such way as to engage the teeth 20 of the
planetary pinion carrier l1 with the teeth of the
orbit gear 5, in order to connect the said gear
5 with the driving shaft I6, and this aiîords the
different speeds for forward drive, as follows:
First speelt-The electromagnets 2 and 3` are
energized; the sun-wheels 23 and I2 are held
stationary.- This añords two successive speed
reduction ratios, one for each gear set.
Second speed-_The electromagnets 2 and 4 are 45
energized; the speed reduction ratio is aiîorded
by the first gear set, and the second set is on
direct drive.
,
Third speci-_The electromagnets l and 3 are
energized; the nrst gear'set is on direct drive, and 50
the second set affords the speed reduction ratio.
Fourth speed-_The electromagnets l and 4 are
energized; the two gear' sets operate on direct
drive.
’
Reverse drive-In order to obtain the reverse
2
2,123,769
drive, the planetary pinion carrier I1 is pushed
Reverse drive-»The reverse drive is obtained
according to the arrow f’ and its teeth 20 enter
into the fixed toothed ring 21, in which it is thus
held fast.
As the driving shaft I6 acts by its gear wheel
Vi
26 upon the planetary pinions 25 of the planetary
pinion carrier i1, these planetary pinions, whose
axes are in the fixed position, will push the orbit
gear 5 in the contrary direction. This affords.
by energizing the fixed electromagnet 32. The
for the gear 5. a reverse motion at a reduced
speed, which can, if necessary, be further re
duced at will by the use of the magnetic de
vices i, 2, 3, and 4, thus providing any one of
the intermediate speeds.
In Fig. 1. the axis of the casing is perpen
dicular to the axis of rotation 23 of the parts to
be operated.
planetary pinion carrier Elliy is held fast. The
driving shaft 30 acts by its gear wheel 46 upon
the planetary pinions 33 of the planetary pinion
carrier 36, which is held in the ñxed position,
and hence these pinions-will drive the orbit gear
`33 inthe reverse direction.
'I'his will afford,
`for this gear, a reverse drive at reduced speed,
which can be transmitted, either directly or after
another speed reduction, to the driven shaft
44, which controls directly a device 28' located
between the engine and the gear box. ,
'I'he said mechanisms are further provided with
a device permitting of holding the driven shaft
in position, independently of the use of electric
energy, in order to prevent, for example (aside
In Figs. 2 and 3, the axis of the gear box, rep Afrom all other braking means) a vehicle from
resented by its casing 8, is parallel to the axis being moved on account of a slope of the ground.
20 of rotation 28 of the actuated parts, the engine
As shown in Figs. 1 and 4, in order to place this
being diagrammatically represented at 29.
device in operation from the outside of the cas
It will be observed on the other hand that it ing, a rod 38, which is normally held in the raised
is feasible to transmit the movement between the position by a pin 89, bearing upon the casing.
axes i6 and 28 which are situated in dii'i'erent- may be turned in such way that the said pin
planes, even if they-make an angle with each 93 will engage in a groove |00 in the casing, and
other.
‘
thus the said rod 33, driven by the spring |0I,
Fig. 4 shows a mechanism which comprises the will enter a recess |02 in the electromagnet 4
same features as in the ñrst ñgure, but in which or 34 secured to the driven shaft 6 or 44, as shown
there are only employed two speeds for forward in Figs. 1n and 4".
Obviously, the invention is not limited _to the ~
drive, and herein the transfer to forward drive
or to reverse drive is obtained by electric means. methods of execution above described, which are
The operation is as follows:
.
susceptible oi' numerous modiiications.
Having now described’ my invention what I
Forward drive at the first speed-The rotat
able electromagnet 3| secured to the driving claim as new and desire to secureY by Letters
shaft 30, and the iixed electromagnet 33 secured Patent is:
to the casing 35, are both energized. The plan
In combination a driving shaft, a driven shaft,
etary pinion carrier 36 secured to the armature two conccntrically disposed gears, one oi' said
gears being adapted to be connected with said
31 is thus driven at the same speed as the driv
driving shaft and to be rotated by said driving
ing shaft 30, and by means of the planetary pin
ions 38, the orbit gear 39 and hence the orbit shaft, a wheel carrier secured to said driven 40
gear 40, will also rotate at the same speed a'sr shaft, planetary wheels rotatably mounted on
the driving shaft 30. Onthe other hand, the said wheel carrier and adapted to mesh with
sun-wheel 4|, secured to the armature 42, is held
fast, and this aii'ords, for the planetary pinion
45 carrier 43 and hence for the driven shaft 44 a re
duced speed.
'
'
Forward drive at the second speed-The ro
tatable electromagnet 3| secured to the driving
shaft 30, is energized. as well as the rotatable
said gears, a ñxed electromagnet, a rotatable
electromagnet secured to said driven shaft, an
armature secured to the other of said gears and 45
adapted to be attracted by said electromagnets,
.a stop surface connected with said driven shaft
and rotatable electromagnet, and a fixed stop
member adapted to be brought into and out of
electromagnet 34 secured to the driven shaft 44, . the path of said stop surface.
which is thus operated on direct drive.
JEAN COTAL.
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