Thursday, 26 September 2013
Transmission and steering mechanism for farm-tractors
Description
D. c . DRILL . TRANSMISSION AND STEERING MECHANISM for agricultural tractors .Application filed September 22 | 919 .Patented November 1, 1921 .raiud D. C. DRILL .SKIN MECHANISIVI transmission and steering tractors.Application filed September 22 . 1919.D. C. DRILL . TRANSMISSION AND STEERING MECHANISM FOR FARM TRACTOHS .Application filed September 22 , T919 .N01 patented . 1 , 1921 .3 SHEETS ORDER 3 .Hio State have invented Pari- UNITED STATES : NT OMCS . NDivs TRANSMISSION - TEERIns goitplpmmms imcnmsn .For all who can t comm:Be it known that I, DANIEL- C .U.S. citizen ,Greenville
County DRILL , an address on the earth Darkle certain new and useful Im
rovementsin Transmission and steerin h ) of which you follow is a
specification , reference is had in him the drawing accompaniing . lT
is ' invention ' refers to the im rovements of mechanical transmission
and steering mechanism for agricultural tractors and lts main objective
is to provide a construction that the tractor is turnedl in much less
time and space is relatively small tractors ble POSF constructed in accordance with common practice.To
achieve the purposes of the invention, the motor is connected to the
drive wheels of the tractor for better transmission gear in a manner
such that one or the other or both wheels Vtractor Ofthe tractor wheels
may be disconnected from the transmission - in the
mechanism of the will of the operator , - beingtransmitted power from
the engine to the drive wheels via a system of gear diierential
lplanetary and providing the tractor with maximum mobility ' - that is,
the tractor can be maneuvered the main advantage with respect to time ANDV space to its rotational movements .Other
features ' of my invention will become apparent from the detailed
description herein theinventionl and illustration of the drawings. Structurally
considered the " device embodying the invention is of simple
construction * solid in all aspects and designed to meet the require-
cough and tractor transmission gears and the purposes of the present
invention.In the accompanying drawings ,igure l is a plan view , partly in section and having the top cover outdoor gear , gear transmission containing my invention;F ig . 2 is a side elevation of the gear according swept im line 2 2 ig . 1;. Figure 3 is a detailed view of the planetary gear unit shown in Figs . 1 and 2, without the brake drum .As
here shown my invention is mounted ina A gear housing , which can be of
any suitable construction to the requirements of the invention.i specification letters patent . med application September 22, 1919 . Serial No.echanism F - Tractors arm ,allow Patented November 1, 1921 .the
housing forwardend A is a drlve longitudlnal axis - connected whichl l -
'the motor gear transmission and drive wheels of the tractor unit sha -
ft belng connected to the motor by any clutch V. suitable (not shown ) . Secured
to the opposite end of the drive shaft 1 is a two bevel gear meshing
with a bevel gear 3 into a transversal Shafty supported in bearings 4 `
ing secured thereto two gears 5 and 6 opposite unequal size.vSupportedin
central portion houslng A gear 10 is in suitable bearings as econd axis
7 spl1ned whlch has the same two opposing gears 8 and 9 of unequal
diameter and adapted to engage with gears respectlvely 5 and 6, the
operation in the presently be described .Also
fixed to the shaft 7 in ' opposite ends thereof by means of nuts 7 are
lland gears between the bearings 10 ' and gears 11. Annular discs and 13
which are screwed into the outer faces thereofinternal gears 14.
Insured ` it
laterally extending housings 18y of the gear housing to , in suitable
bearings 16 - l7 , arebutt - shafts 15 that are substantially in.
alignment with axis 7 , and - have been secured to their inner ends
yflanges annular 19 having openings suitable
therein to receive an end of lstuds or butt shafts 20 and 21, the "
opposite ends of the shafts 20 to 21 ` C -1 being ported ring supports
22 in which the flanges 19 boited in1 one . Suitably,
thereby forming a space between the flanges and the ring supports
through which the shafts 20 and 21 extend transversely . FIn
- the shafts 20 are mounted integral gears 23 and 24 of unequal
diameter Vare , and shafts 21 are mounted the individual gears 25 ,
having two each of the gears 23 and 24 and 25 used in each of the opposing
sets of planetary gear, the gears of each set being disposed
diametrically opposite each other , the gears 23 and 25 being
substantially in the same plane and therefore Avertical adapted to mesh
with one another , and the gears 24 being in the plae 11k
gear and meshing therewit ends discs 27 which are secured by C - . C
houslng gear to and hav - supported in suitable bearings ` Ain I ride BB
bearings 12 are fi 27L internal gear screw 28 . the
discs is provided , preferably cast integrally therewith , flanges or
ridges 29 , discs 13 are provided which serve to assimilate flange 30 ,
respectively, brake bands for discs 13 and 27 which funcf tion with one
another to the plane `tar gear carries with it , as will be presented and described .Disks
13 ' are provided furtherl external gear 31 adapted to mesh with gears
and 57, respectively, of a differential gear device which is preferably
used in cooperation with the planetary gear transmission . The gear 55 is mounted on a shaft 56 ptreferably s uaring the end of the sha as shown in ig . 2 of the drawings ,and gear 57 is mounted in perfect Mannery ori - a shaft 58 . An
intermediate gear 59 is also mounted on shaft 56 , being striated to
allow the same lengthwise movement thereof relative to the shaft, and an
" intermediate gear 60 is fixed to the shaft end NER in '58 , the gears
' cooperating
59 and 60 is adapted to engage with each other accordingly as the gear
59 can move the shaft 56 relativeTo . to O ration gear 59 ' thereof is
provided with an extended hub 61 which has a slot formed in thereof.
Cooperating with the slot is a block 62 and a crank pin 63 fixed to a
crank shaft in a bearing 64'supported into the housing 65 and operable
by a lever 66 . Thus, the lever 66 thegear 59 can be moved into and out of engagement with the gear 60 for a purpose to be described presently .With
THEV relinquish detailed explanation on the construction of the gear
transmission containing my invention , the operation and the result of
the operation thereof will be readily understood by those skilled in
this art. riefiy
said operation is as follows The tractor has two forward speeds as
dctermined by changing gears 8 and 9 which produces one or ' the other
to engage the gear rcspective Cooperating 5 or 6, the displacement of
the gears are carried by a team D lever mounted in a suitable housing 76 secured to the casing of a gear, and it has. three
positions , namely , low, high , neutral , the lever is alined in the
respective positions by a detent pawl plate 77 Cooperating orl a plunger
spring 78 of the shift lever . Therefore,
by moving the lever to the left of the central or neutral position ,
the gear 9 is caused to engage the Gear6 , and moving the lever to the
right of center of the gear wheel 8 is made to mesh with the gear 5 , thereby adjusting the gear transmission mechanism of high or low , respectively.Eitherjof
accelerates in the forward gear 11 is actuated , although the central
axis unit Ofthe 1 March 2 bevel gears , one or the other of the gears
August 5 or 6-9 and the transverse axis 7, counterclockw1sedirection as
shown in Fig . ` 2 of the drawings . 23-24
integral gears meshing with gears 11 , therefore , are driven in the
opposite direction, and the gears 25 meshing with gears 23 are driven in
the same direction as the gears 11. The
internal gear 14 meshing with gears 24 are driven in the same direction
as the gears 24 , therefore , in the opposite direction to the gears 11
and the internal gear 28 meshing with the ears 25 are driven in TE the same direction as gear 25 and , therefore , in the same direction as the gears 11.Will
be apparent, therefore, that if the internal gear 14 ' being
heldstationary and gears 11 rotates in the direction shown , the gears
24 rotate in the direction indicated, and also being caused to rotate in
a planetary path in the same direction as the
gear 11 rotates , the gears 24 are also connected to the disk flange 19
by means of brackets 22 and the abutment ring 20 the axes of the discs
with the shaft 15 can be rotated in the direction of movement of the
planetary gears 24
and , therefore , in THC same direction as the gear 11 , but at a lower
speed , the speed ratio is determined by the gear ratio between gears
11 and 14. In
this
relationship and operation of the gears of the disks 29 through
the medium of gears 23, 25 and the internal gear 28 can rotate idlyupon
axis 15 in the same direction as the gear 11.Inglike
, if the gear 28 is held fixed gears and thel 11 is rotated in the
direction indicated , the gear 14 can rotate idly shaft gears upon'the
July 25 can be rotated in the same direction as the gears 11
but will be caused to rotate about the internal gear 28 in the opposite
direction, thereby causing the shafts 15 to rotate in the direction
opposite the direction of rotation of gear 11 and a relatively low speed
as determined for the transmission ratios of the gears 11, 23 and 28.The
axes 15 are arranged at their outer ends with gears 79 which are
adapted to engage suitable gearing driven by the drive wheels of the
tractor ( not shown) . And
in order to control the operation of the internal gears 14 and 28
relative to the planetary gears 24 and 25 of the flange portions 29 and
30 of the respective gears are brakeI drums have Cooperating therewith,
as best shown in figures . 2 and 3 brake bands 32 and to this provision in my 35 . Top
casin A master gear is provided with cover plates 39 ' key that extend
rearward portions 40 which form a support for a right brake lever may be
attached to the lever shaft 41 . The
portions 4l are provided with studs 42 and 43 which are radially
arrangedl central fulcrum 44, and arc connected respectively to the push
rods 36 by hinge connections 45 and 46.When
the brake lever is set to the position shown in FIG 2, both brake bands
ang loosened opposing brake drums 29 and 30 , along with the internal
gears 14 and 28 are free to rotate with the rotation of the gear 11. However,
with the operation of the brake lever in either direction from the
position of one or the other of the brake bands are taut by a powerful
gripping action for the corresponding brake drum , the stops 50 and 51
which acts to prevent excessive movement of the lever brakeV in any direction. Brake
bands are preferably made in two parts hinged together , as shown , by
means of hinge pins 52, the bottom of the gear box is also provided as
shown here with a removable plate 54 through which . The joints of the brake band are rendered readily accessible . By
removing the plate from the pins 52 ma be removed and opposing sections
or brake bands thus released, the forward ends up being released by the
retreat rods36 pulse can be removed from the gearbox through the opening in the gearbox housing for the plate 39 .From
the foregoing detailed description be understood that a tractor
equipped with my best gear transmission can be as shown here two speeds
forward and reverse , and that the rate of speed at which the tractor is
being operated can perform
at will by operating the gearshift lever and the direction of travel of
the tractor can be made at will by manipulating the brake levers .It
will also be apparent in view of the gear units Planetar plural
transmission mechanism that either the traction wheels of the tractor
may be related to the engine independently of each other , astwo wheels and having relation to the engine while driving . While
invention is not novel in their projects and functional , the means
have been used to achieve this are mechanical and operational advantages
and possess'important novel .I
also use my best regarding planetary gear transmission , as described
here , a novel construction of the differential mechanism . This latter feature , however. not essential for the satisfactory operation of the tractor in all conditions , but under certain conditions to be described ,greatl
differential mechanism adds a mobility thel tractor partlcular and ,
with respect to time and space required for the turning movements of the
tractor. To
this end, the gears 31 are formed integrall with drum brake discs 13
and the direct advance whic or rearward movement of the tractor are
driven in the same direction, are caused to engage with respective gears
55 -57
therefore, when the gear 59 moves into mesh with the gear 60 the effect
on the transmission gear is the same as the effect produced by the
operation of the brake lever with respect to both the brake drums 30 , except
that there can be no differential action of a planetary gear set with
respect to the other as in a direction of rotation of the gears 31
should be rotated in the opposite direction of the other gear 31 .The
advantages of the differential mechanism between the opposing units
operating gear transmission vin immediately operate are , of course,
evident. By
this arrangement, the offset between the differential gear transmission
gears movement variations that may occur between opposite wheels , as
will be on'curves or diverting direct line movement , the compensation
effect of the difference to be automatic without the manipulation of the planetary gear brakes .Separate
forward and reverse control opposite units of permissions gear
transmssion turning movements of the tractor driving the wheels of the
tractor forward and one in reverse direction , thus effecting the
rotational movement withinthe
length tractor wheel base , the center of the turning movement that is
substantially central axis of the wheel, thus effecting a shift in
angle, half-turn or full turn of the tractor no gain in any direction
with respect to movement center .It
will be obvious , of course, that instead of causing the wheels to move
in the reverse direction it can be completely disconnected from the
transmission in the rotation. It
is also understood that the front wheels of the tractor will be
adaptable to short turning operation contemplated by this feature of the
invention .It
will also be apparent that the drive wheels can be used in view of its
wide range of independent movement coperative for steering, as the front
wheels in the usual construction - tion 125 is easily respond to the
movements of the driving wheels. This
applies more particularly , however , the types of crawler tractors ,
in which the rotational movement can be performed in any direction for
the release of the brake lever 13 on the side in the direction ( return
should be made
. When the turn has been made to the desired size of the brake lever
is set again and the tractor moves in a straight line as before.It
may also be conveniently provided in connection with my best
transmission through gears for driving a pulley so that the tractor
engine can be used to operate other machines. To
this end, a belt drive shaft 71 is mounted in suitable bearings 73 and
74 at the forward end of the main gear housing , the shaft is operated
by a gear 72 secured thereto and meshing with the gear 5 and
the bearing 74 to be extended laterally by a suitable housing E so that
the belt pulley is secured thereto erase the gear housing .From
the foregoing detailed description of the construction, operation and
results of the operation of my better transmission and differential
gear, and realized significant benefits comprehendedand thereof will be
readily appreciated by those skilled in this art. The
increased mobility of tractors as well as structural advantages
realized by the invention are of fundamental importance in the
development of the tractor and construction , improvements that increase
the effect of mobility and at the same time provide structural
advantages all tend to Morel complete marketing or adaptability of tractors to average agricultural conditions.
Having thus fully described my invention , what I claim as new and desire to secure by Letters Patent is i 1. In
the gear transmission of the combination of a motor drive shaft , a
plurality of axes having'driving relationships opposed drive wheels , a
plurality of planetary drive units , gearing interposed between the
drive shaft and said opposing
axes , and the mechanism for controlling each of said planetary gear
units independently of each other , so that engine power can be
transmitted to cause the wheels to rotate in reverse directions relative
to each other , and connecting means opposing units planetary gear transmission for making the units to rotate in unison .v2. In the gear transmission , the combination . a
motor drive shaft , a plurality of shafts having driving connection
with opposing drive wheels , a plurality of transmission units VA
planetary gear including plurality of brake bands for each unit
interposed between said drive shaft and opposing
axes , and a mechanism to control each of said planetary gear units by
which energy can be transmitted to said wheels for driving same in a
plurality ' of predetermined speeds either forward or backward simultaneously
or serz'atm , and means connecting the opposite ` ' drive units for
causing the planetary gear units rotate in unison .Three . In
the gear transmission , the combination of a motor drive shaft , a
plurality of driving axes having relationship wlth opposed drive wheels ,
a plurality of units planetary gear transmission interposed between the
drive shaft and opposite said shafts ,
said friction wheel units , including means for reversing the direction
of rotation of the respective shafts opposite a speed change gear
interposed between the gear units and the drive shaft , and the
mechanism for controlling each of said
planetary gear units and said rate of change " gear which said engine
power can be transmitted to said wheels for driving same in forward and
reverse directions ATA plurality of predetermined speeds or
simultaneously. serz'atif / n, and means connecting the units opposite planetary gear transmission for the drives to rotate umson .April . In
the gear transmission , the combinatlon , a motor drive shaft , a
plurality of axes having a driving relationship with opposed drive
wheels , a plurality of units planetary gear transmission interposed
between the drive shaft and said shafts opposites,
and a plurality of brake bands for each of said planetary gear units
which said engine power can be transmitted to said drive wheels and the
differential mechanism interposed between the opposite UMTS planetary
gear .May . Transmlssion
gear in the combination , of a motor drive shaft , a plurality of
shafts having driving connection with opposing drive wheels , a
plurality of transmission units planetary gear 105 interposed between
the drive shaft and opposite said shafts the
mechanism for controlling sald each'of planetary gear units which
lengine said power can be transmitted to said drive wheels , and
normally switched - connected differential gear 110 interposed between
the opposing units Laneta - RY and operable geuring to cause said ) to rotate relative units 1N compensation to each other.June . In
the gear transmission , the combination 115 tion of a motor drive shaft
, a plurality of shafts having driving connection with opposing drive
wheels , a plurality of gear units interposed bietween
planetarytransmission drive shaft and said opposite axes
120 , for each control mechanism drives planetary gear sald which said
engine power can be transmitted to said drive wheels , and usually
disconnected differential mechanism be - tween 125 filed opposing units
planetary gear and operable to cause said units rotate unlson 1n , but offset relative to each other.7 . In the gear transmission of the combination - . 130
tion of a motor drive shaft , a plurality of axes having a driving
relationship with the opposing shafts , a plurality of transmission
units planetary gear interposed between the motor drive shaft and said
axis opposite the gear
change mechanism between the motor drive shaft and said units - and
planetary gear change mechanism between the respective planetary units .August . In
the gear transmission , the combination of ' the drive shaft motor, a
shaft pluralityy having driving relations with opposing drive wheels . intermediate
drive shaft and a plurality of transmission units of'planetary gear
interposed between said opposing axes and the drive shaft INTERMEDIAT -e
, connections between the movable gear planetary units , and . control
planetary gear mechanism consisting of a plurality of change gear
mounted at different values and said intermediate shaft adapted to be
moved in operative relationship with the motor drive shaft so that said
wheels may be operated at a plurality predetermined speed .9. In
the gear transmission , the combination of a motor drive shaft , a
plurality of driving axes having relationship with opposed drive wheels ,
a plurality of units planetary gear transmission interposed between the
drive shaft and said shafts opposite
to each control mechanism drives said planetary gear which said engine
power can be transmitted to said drive wheels , and usually neutral
differential gear having gear ratios with said planetary gear units
opposite and having a shift
gear mechanism operable to bring the train differential between these
planetary gear units whereby said units will be forced to rotate
relative to one another offset .10 . In
the gear transmission , the combination of a drive sprocket , a
plurality of drive shafts of driven wheels thereof, drives a plurality
of planetary gear transmission including a plurality of brake bands for
each unit interposed between the pinion driy'e
said drive shafts and a housing and the mechanism contained in the
control mechanism for each of said brake bands which the power of the
drive sprocket can be transmitted to said drive wheel , and means
connecting opposite drives planetary gear transmission to make the units to rotate in unison.11. In
the gear transmission combinationkof a plurality of drive shafts of the
wheels of the machine, a plurality of units of planetary gear
transmission including a plurality of brake bands for each unit
interposed between the motor shaft and said
drive shafts and wheel mechanism for controlling each of said brake
bands independently of each other , so that engine power can be
transmitted to one or the other of said wheels to make the machine
rotate in
any wheel as the center or at an intermediate wheel center and opposite
connecting means units planetary gear transmission units to which
rotate in unison .
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