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Патент USA US3093017

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June 11, 1963
v
F. c. Ar-:BERsoLD
couNTERsHAFT GEARING NOISE ELIMINATOR
F11ed Nov. 14, 1961
3,093,007
nir
C@
3-,ii93,0ll7`
Patented June 11, 1963
i.
ting the splines 28 between the front end of the output
shaft 12 |and the clutch gear 16 straight or parallel to the
output shaft yaxis of rotation, this invention proposes
rolling or cutting the splines 28 on the output shaft 12 and
3,693,907
CQUNTERSHAFT GEARING NOISE
ELIIWINATÜR
Frederick C. Aebersoid, Detroit, Mich., assigner to
Chrysler Corporation, Highiand Park, Mich., a corpo
on the inside of the clutch gear 16 at an angle to the shaft
taxis of rotation and this will cause the clutch gear 16 to
ration of Delaware
push back against the second speed gear S and the thrust
friction washer 22 when torque is applied from the clutch
gear sleeve 14 Ito the clutch gear 16. The correct »angle
for the splines 28 must be determined from the friction
characteristics of the thrust friction -washer 22 and the
input torque applied to the clutch gear 16 as various types
Filed Nov. 14, 1961, Ser. No. 152,302
13 Claims. (Cl. ’74-325)
This invention relates to ya means for eliminating gear
rattle in countershaft gearing assemblies `and particularly
gearing »assemblies such Ias those used in manually shifted,
sliding gear, motor vehicle, multiple speed, drive train
transmissions.
of engines have varying torque output :and tiring pulse
It is a primary object of this invention to provide a
gear rattle yeliminator that can be readily and economi
intensities. It should be pointed out that ‘with manually
shifted power transmission units the input shaft 10 is
usually connected to the crankshaft of the vehicle engine
cally incorporated in the current type of manually shifted,
by a friction clutch so there is no fluid torque converter
sliding gear, motor vehicle drive train transmission with
or ñuid coupling to yabsorb engine generated pulsations or
out introducing complexities or problems las regards the
vibrations that act to develop gear rattle in unloaded con
manufacture and/ or operation of the transmission or its 20 stantly meshed transmission gears such las the gears C,
components.
C2 and S of the disclosed transmission.
It is still another object of this invention to provide
FIG. 1 shows a multi-speed, sliding gear, countershaft
-a friction damping means that fwill be »automatically acti
type power transmission unit comprising a box-like hous
vated lby the transmission of drive through the transmis
ing 8 that rotatably journals a pair of axially aligned
sion to eliminate gear rattle that may be the result of 25 input and output shafts 10 and 12 respectively. Input
rotation of meshing unloaded gears of the transmission.
shaft 10, that is adapted to be‘drivingly connected to an
It is a further object of this invention to interconnect
engine crankshaft (not shown), is journaled in the hous
a transmission gear and its supporting shaft by means
ing 8 by means of a ball bearing assembly 130. Input
such that transmission of drive through said gear will
shaft 10 has integrally formed on its rear end portion
cause relative axial movement between the gear and its 30 the drive pinion P that is meshingly engaged with the
shaft to activate a friction damping means that prevents
cluster input gear C of the countershaft gear cluster as
or eliminates gear noises associated with other gears of
sembly 34. The countershaft gear cluster assembly 34
the transmission.
includes in addition to the cluster input gear C, the cluster
Other objects and advantages of this invention will be
second speed gear C2, the cluster iirst speed gear C1 and
35
readily apparent from a reading of the following descrip
the reverse drive gear Cr. 'I‘he cluster gear assembly 34
tion and a consideration of the related drawings wherein:
is journaled on the housing supported countershaft 36
FIG. 1 is a sectional elevational view of a countershaft
by means of the spaced roller bearing assemblies 37, 3S.
type, sliding gear, manually shifted multi-speed trans
'I'he transmission output shaft 12 has its reduced diam
mission adapted for motor vehicle drive trains which
eter forward end portion 41 piloted in the rear end of
40
transmission embodies this invention, the transmission
the input shaft ‘10 by means of a roller bearing -assembly
being shown in neutral condition; and
42. The rear end portion 43 of the output shaft 12 is
FIG. 2 is an enlarged, fragmentary sectional elevational
journaled in housings by means of a roller bearing as
view of a portion of the transmission shown in FIG. l,
sembly 44. The rear portion 45 of the output shaft 12
with the transmission gearing being shown conditioned
is helically splined to seat, by an axially slidable, drive
for the transmission of direct drive between the trans
transmitting, toothed connection 4S, the first speed and'
mission input and output gears.
reverse shifter gear F. Forward shift of gear F to engage
Manual transmission gear rattle results from variation
cluster iirst speed gear C1 will provide means for the
in the speed of input shaft 10 causing the teeth of the
transmission of a low or first speed forward drive from
drive pinion P and cluster gear C and the teeth of the 50 drive pinion P to cluster input gear C, to cluster first
cluster gear C2 and second speed gear S to loose contact
speed gear C1 to shifter gear F, to output shaft 12. Like
and then recontact with an impact emitting the trouble
wise, rearward movement of the shifter gear F into en
The variations in input shaft
gagement with the idler gear 46, that meshes with cluster
angular velocity are caused by engine tiring impulses and
some gear rattle sound.
reverse gear Cr, will transmit a reverse drive to the output55 shaft 12. As the shifter gear F is not engaged with the
are greatest at low speeds.
In norm-al high gear or direct drive operation the input
shaft 10 is drivingly locked to the output shaft 12 through
the clutch gear sleeve 14 and the clutch gear 16 which is
connected by helical splines 2S to the output shaft 12.
The second speed gear S however is rotating at a lower 60
speed than the output shaft 12 because it is geared through
the cluster gears C2, C tothe drive pinion P. The second
gears C1 or Cr, except when drive is being transmitted
therethrough, there is no problem of gear rattle noise from
these gears due to make-and-break gear tooth contact
such as is the case when direct or third speed forward
`drive is being Itransmit-ted Iand the cluster input gear C
‘and the second speed gears C2, S are rotatively engaged
but not torque loaded.
speed gear S is free to rotate on surface 20 of the output
The rear end portion of the input shaft pinion gear P
shaft 12. When proper friction is applied between the
is provided with a splined portion 51 that is adapted to
second speed gear S and the output shaft ~12 with a fric 65 be drivingly connected to the output shaft clutch sleeve
tion washer 22, or an equivalent means, the rattle surfaces
14, as .shown in FIG. 2, to provide for the transmission
of the several unloaded gears remain in contact and the
of a direct or third speed forward drive from the input
transmission does not produce gear rattle noise.
shaft l@ to the output shaft 12. Clutch sleeve 14 is
This invention presents a preferred method of apply
spline connected at 52 to the clutch gear 16. Clutch gear
ing friction between the second speed gear S and the out 70 16 is drivingly connected to the output shaft 12 by in
put shaft 12 that eliminates rattle Without disturbing the
ternal teeth 54 that are slidably engaged in the helical or
shift characteristics of the transmission. Instead of cut
angled splines |28 that are formed on the forward portion
3,093,007
of the output shaft 12. The angled splines 2S may extend
that the friction loading applied by the spring washer 66
at lO-ZO degrees to the shaft axis, but this angle can vary
materially. The action of these angled splines 28 in com
bination with the friction washer 22, as will be explained
hereafter, is the crux of this invention.
is not applied until after the shift has been completed
and «torque is being transmitted in direct drive because
it is the transmission of torque in direct drive that actuates
the shiftable clutch gear 16 and floating second speed gear
S and moves these gears rearwardly on the output shaft
12 to cause flattening of the spring washer 66 and loading
AvRearwardly of and adjacent the clutch gear 16 is the
second speed forward drive gear S. This gear S is rota
of the friction washer 22 against the second speed Vgear S;
tablyÍ mounted on` the surface portion 20 of the output
This is an important feature that is thought -to distinguish
shaft so «tha-t it is free to’rotate relative to and shift ax-ially
of the output shaft "12. This second speed gear S has a 10 this invention `from anything that may have been pre
viously attempted to `eliminate gear rattle by friction
toothed forward portion 61 that is adapted to be drivingly
loading.
connected to theV clutch sleeve 14 when the sleeve 14 is
It will be noted that the shift of the clutch sleeve 1-4
' shifted rearwardly. Under such a condition the second
forwardly and rearwardly to alternately selected third
speed gear S is then connected to the output shaft 12 for
the transmission of a second speed forward drive Áfrom 15 speed and second speed forward drive, respectively, actu
ates a synchronizer link 63 that is connected to the gear
the pinion P -to the cluster gear C, to the cluster second
carried synchronizer rings 67 and 68. This type of syn
speed gear C2, to the second speed gear S, through the
chronizer assembly is well known in the transmission
clutch sleeve 14,. and clutch gear 16, to the output shaft‘12.
field and as it is not a part of the invention herein claimed,
It will be noted that the rear side of the second speed
gear S is recessed as shown at 65 to, provide a space to 20 it is not thought that a detailed description thereof is
necessary. However, it should be pointed out that the
mount the` friction Washer 22 and the Belleville-type,
synchronizers 67, 63 operate to assist -in making clutched
dished, spring `¿vasher 66,. The recess 65 in the rear face
engagement between the clutch gear sleeve ‘14 and the
of the gear S__ provides'space for the rearward axial shift
gear carried clutch portions S1 and 61 of the pinion P
of the gear S ~asthe spring Washer 66 is ñattened out as
shown in FIG. _2. Obviously the recess 65 could be 25 and second speed gear S respectively. As actuation of the
gear S rearwardly along the output shaft 12 occurs after
omitted if the width _of the gear S were reduced or the
clutched engagement of the -sleeve 14 with the pinion
portion 20 o_f the output shaft elongated. The important
section 51, it is thought to be obvious that the axial
Polli? iS that the gear S is arranged on the output shaft
-movement of the gear S does not affect the operation
12 for limitedaxial movement relative thereto.
With the arrangement shown, when the transmission
»is conditioned for 'direct o_r third speed forward drive, the
application of drive torque from the drive pinion P
through the clutch sleeve -1_4_ to the clutch gear 16 causes
the clutch gear `1,6 to move rearwardly along the helical
' splines 2S and torpushwthe Vheating second speed gear S
30 of the synchronizing means.
-It has „been found advantageous to drivingly connect
the friction washer 2_2 to the output shaft »12 to prevent
relative rotation therebetween so that the side face of
Iwasher 2_2 will be eiîective for friction damping against
35 gear- side portion 65.
rearwardly ,against the frìçtian washer. 2.2 and spring
Washer 6_6. The clutch gearY 176 and second speed gear S
Also, it has been found advan
tageous to limit the amount of friction damping by pro
viding a ring stop S8 that limits the rearward axial shift
ofY clutch gear ._16. Stop'SS prevents build-up in «the
will Yassume the positions shown in FIG. 2 when direct
damping action of washer 2.2 in proportion to the torque
drive is being transmitted and this will cause a friction
loading of the gear S by the compressed spring washer 66 40 .being transmitted by the clutch gear _16.
and the engagé-¿friction washer 22- Under such Cir
l Claim;
I
cumstances the vteeth off the cluster gears C and C2 will
_1. In a transmission, a rotatable input shaft >with »a
not osçillate'relàtive tó the ‘teeth of the pinion P and
_second speed- gearS and gear rattle noise will not develop.
drive pinion and clutch means thereon, a rotatable output
shaft with an axially shiftable clutch gear drivingly con
It might be'ques'tioned asv to whether gear rattle noise 45 nected thereto, a clutch sleeve taxi-ally shiftable and driv
might develop when either ñrst speed forward drive or
ingly mounted on said Áclutch gear, and another gear
reverse drive -is transmitted because at such times the
mounted on the ¿output shaft adjacent said clutch gear
gears C2 and S are not torque'loa'ded. However, no real
gear noise problem develops dur-ing first speed or reverse
drive because at such times the engine speed is relatively
high so that cylinder ñring pulsations are less likely to
be transmitted and furthermore ñrst speed and reverse
drive are normally used for such short periods of time that
nothing _of a Vgear rattlenoise problem 'has been found
to exist in transmissions of the disclosed type. It appears
that you PES5 through the first speed or reverse drive ratio
so fast and at such relatively high engine speeds as com
pared to direct drive engine speeds that there is no prob
lem _of gear rattle noise in either of these ratios.
As previously mentioned, with the construction shown
there is 'a means provided to friction load the second
Vspeed gear S, when the transmission »is conditioned for
third speed forward or direct drive, so that the counter
shi?table `axially Iof and rotatable relative -to said output
shaft with said other gear having clutch means thereon,
50 axial shift of said clutch sleeve being effective to selec
tively clutch said input shaft and said other gear to said
output
.a unitary counters-haft gear cluster rotatably
supported :adjacent said input »and output shafts having
a ñrst gear meshijlgly engaged with said input shaft drive
55 pinion and a second gen meshingly engaged with said
outpnts'haft mounted »other gear, and means -to friction
ally engage said output shaft »mounted other gear and
prevent gear rattle noise, said friction means being ar
ranged adjacent to and adapted to be applied to said
60
1(Sihther gear Áby axial shift of said other gear on said output
‘2. In a transmission, a rotatable input shaft with a Y
drive pinion and clutch means thereon, a rotatable out
shaft gears' C2 and C that are not, under torque during
put shaft with an axially shifta'ble clutch gear drivingly
direct` drive, will not produce gear rattle. The friction 65 connected thereto, -a clutch sleeve axially shiftable and
loading of the cluster second speed'gear C2 is transmitted
drivingly mounted on said clutch gear, and `another gear
to the connected, free running, cluster input gear C dur-ing
mounted on the output shaft adjacent said clutch gear
direct drive so noV rattle noise develops between the teeth
shiftable axially o_f and rotatable relative to said output
of gears P and C during direct drive.
I
shaft with said other gear having clutch means thereon,
While there have been other attempts to eliminate gear 70 axial shift of said clutch sleeve being effective to selec
rattle noise by rfriction loading `these prior attempts -usu
tively clutch said input shaft and said other gear to said
ally yapplied a continuously acting friction loading on the
output shaft, la unitary countershaft gear cluster rotat
several gears and this continuous loading caused diñi
ably supported »adjacent said input and output shafts hav
culties in the desired shifting characteristics of the ltrans
ing 'a iirst gear meshingly engaged with said input shaft
mission. With the design herein disclosed it will be noted 75 drive pinion and a second gear meshingly engaged with
3,093,007'
5
5
said output shaft mounted other gear, and means to fric
tionally engage said output shaft mounted other gear and
prevent gear rattle noise, said friction means being «ar
ranged adjacent to and adapted to be applied to said
other gear lby the axial shift of said clutch gear towards
said other gear.
3. -ln a transmission, a rotatable input shaft with a
drive pinion and clutch means thereon, a rotatable out
put shaft With an axially shiftable clutch gear d-riv-ingly
connected thereto, a clutch sleeve axially shiftable and
drivingly mounted on said clutch gear, and another gear
mounted on the output shaft adjacent said clutch gear
shiftable axi-ally of and rotatable relative yto said output
shaft with said other gear having `clutch means thereon,
axial shift of said clutch sleeve being effective to selec 15
tively clutch said input shaft and said other gear to said
output shaft, a unitary countershaft gear cluster rotatably
supported `adjacent said input and output shafts having
a first gear meshingly engaged with said input shaft drive
pinion and a second gear meshingly engaged with said
output shaft mounted other gear, and friet-ion means
on said output shaft to frictionally engage said output
shaft mounted other gear and prevent gear rattle noise,
said friction means being arranged -to be applied to said
`other gear yby the axial shift of said clutch gear towards 25
said other gear as a result of torque transmission zby said
clutch gear.
4. In a transmission, a rotatable input shaft with a
drive pinion and .clutch means thereon, a rotatable out
put shaft with an axially shiftable clutch gear drivingly
connected thereto, a clutch sleeve axially shiftable and
drivingly mounted on said clutch gear, and another gear
mounted on the output shaft adjacent said clutch gear
shiftable axially of and rotatable relative to said output
shaft with said other gear having clutch means thereon,
axial shift of said clutch sleeve being effective to selec
tively clutch said input shaft and said other gear to said
output shaft, a unitary countershaft gear cluster rotat
ably supported adjacent said input and output shafts
having a first gear meshingly engaged with said input
shaft drive pinion »and a second gear meshingly engaged
with said output shaft mounted other gear, :and means
arranged adjacent said other gear to frictionally engage
said output shaft mountedrother gear -'and prevent gear
rattle noise, said friction means being arranged to be
applied to said output shaft mounted gear 4as a result
of axial shift of said output shaft gear due »to axial shift
of said clutch mechanism when torque load is transmitted
thereby.
7. In a transmission, a rotatable input shaft with a
drive pinion rand clutch means thereon, a rotatable out
put shaft with an axially shiftable clutch gear drivingly
rconected thereto, a clutch sleeve axially shiftable and
ydrivingly mounted on said clutch gear, and another gear
mounted on the output shaft adjacent said clutch gear
shiftable axially of and rotatable relative to said output
shaft with said other gear having clutch means thereon,
axial shift of said clutch sleeve `being effective to selec
tively clutch said input shaft and said other »gear to said
put shaft with an axially shiftable clutch gear drivingly
output shaft, a unitary countershaft gear cluster rotat
connected thereto, a clutch sleeve axially shiftable and
ably supported adjacent said input and output shafts
drivingly mounted on said clutch gear, and `another gear
having a first gear meshingly engaged with said input
mounted on the output shaft adjacent said clutch gear
shaft drive pinion «and a second gear meshingly engaged
shiftable axially of and rotatable relative to said output
shaft with said other gear having clutch means thereon, 35 with said output shaft mounted other gear, and means
carried by said output shaft and actuable to frictionally
axial shift of said clutch sleeve being effective to selec
engage said output shaft mounted Iother -gear land prevent
tively clutch said input shaft and said other gear to said
gear r-attle noise, said friction means being arranged to
output shaft, a unitary countershaft gear cluster rotat
ably supported adjacent said input and output shafts
having a first gear meshingly engaged -with said Ainput
shaft drive pinion and a second gear meshingly engaged
with said output shaft mounted other gear, and means
be applied to said output shaft mounted gear as a result
of axial shift of said output shaft gear due to axial shift
of said clutch mechanism when torque load »is transmitted
thereby for direct drive.
8. -In `a transmission, a rotatable input shaft with a
adjacent said other gear shiftable to frictionally engage
`drive pinion and clutch means thereon, a rotatable out
said output shaft mounted other gear and prevent gear
rattle noise, said friction means lbeing arranged to be 45 put shaft W-ith an axially shiftable clutch gear driw'ngly
connected thereto, a clutch sleeve axially shiftable :and
applied to said other gear by the axial shift of said clutch
drivingly mounted on said clutch gear, and vanother gear
gear towards said other gear -as a result of torque trans
mounted on the output shaft adjacent said clutch gear
mission by said Iclutch gear when >said clutch gear is en
shiftable axially Iof and rotatable relative to said output
gaged with the `clutch means on said input shaft.
5. In a countershaft-type transmission gear box, a ro 50 shaft with said other gear having clutch means thereon,
axial shift of said clu-tch -sleeve being effective to selec
tatable input shaft mounting `a drive pinion vand a clutch
tively clutch said input shaft and said other gear to said
means, a rotatable output shaft coaxial with said input
output shaft, ka unitary countershaft gear cluster rotat
shaft having a clutch mechanism axially shiftable there
ably supported adjacent lsaid input and output shafts
on and adapted to be engaged with the input shaft clutch
means to drivingly connect said shafts for direct drive, 55 having a first gear meshingly engaged with said input
shaft drive pinion and :a second gear meshingly engaged
said clutch mechanism being connected to said output
with said output shaft mounted other gear, and means
shaft by a grooved connection extending longitudinally
to friotionally engage said output shaft mounted other
of and at an angle -to the axis yof rotation of said output
gear and prevent gear rattle noise, said friction means
shaft, -a gear rotatably mounted on said output shaft
being arranged to be applied -to said output shaft mounted
adjacent said clutch mechanism, said gear having a clutch
gear las a result of axial shift of said output shaft gear
means adapted to -be drivingly engaged with said output
due to axial shift of said clutch mechanism when torque
shaft mounted clutch mechanism, a unitary countershaft
load is transmitted thereby and comprising a friction
gear cluster rotatably mounted on an axis extending par
means mounted on said output shaft land arranged to be
allel to said input and output shafts, said countershaft
brought into abutting engagement with a side face por
gear cluster having a first gear in meshed engagement
tion of said output shaft gear to limit .axial -shift thereof
with said input shaft drive pinion and a ‘second gear in
in one direction.
meshed engagement with said gear on said output shaft,
and friction means carried ’by said ou-tput shaft arranged
9. In a transmission, a rotatable input shaft with a
to be applied to said output shaft gear as :a result of
drive pinion `and `clutch means thereon, a rotatable out
drive torque induced axial shift of said clutch mecha 70 put shaft with an axially shiftable clutch gear drivingly
nism when direct drive is transmitted between said input
connected thereto, a clutch sleeve yaxially shiftable and
drivingly mounted on sai-d clutch gear, `and another gear
and output shaft -to prevent gear rattle 'between the un
loaded, meshingly engaged, gears.
mounted on the output shaft adjacent said clutch gear
shiftable axially of and rotatable relative to said output
6. ln a transmission, a rotatable input shaft with =a
drive pinion and clutch means thereon, a rotatable out 75 shaft with said other gear having clutch means thereon,
3,093,007
of torque thereto Vand shsf'vtblie 'axially thereof for selec
axial shift of said clutch sleeve being elîective to selec
tively Iclutch said input shaft and `said other gear to said
output shaft, a unitary countershaft gear _cluster rotat
ably supported adjacent said input and output shafts
having a iirst gear meshingly engaged With said input
shaft drive pinion `and a second gear meshingly engaged
tive clutching engagement with the clutch means on said
input shaft `and the output shaft mounted gear, a unitary
countershaft gear cluster rotatably mounted on an laxis
parallell to the input »and output shafts ‘and having `a cluster
input gear meshingly engaged with said input shaft drive
pinion and `a second cluster .gear meshingly engaged with
with said output shaft mounted other gear, and means
said output shaft mounted gear, and friction mean-'s
to Vùic'tionally engage said output shaft mounted other
mounted on lsaid output shaft ¿arranged to be forcibly
gear land prevent gear rattle noise, said friction means
being arranged to be »applied to said output shaft mounted 10 engaged with said output shaft mounted gear when said
clutch gear is shiftediax'ially .towards said ‘ouput shaft
gear Ias a result of axial shift of said output shaft gear
mounted gear as a result of torque transmission directly
due to axial shift of said clutch mechanism when torque
load is transmitted thereby and comprising a resiliently
supported friction means mounted on said output shaft
from said input shaft to said output shaft ‘through said
clutch sleeve.-
and arranged to be brought into 'abutting engagement
with ,a side face portion of said output shaft »gear to limit
1a drive pinion thereon, a rotatable output shaft with an
axial shift 'thereof in onedirrectîon.
i 12. In a transmission, a rotatable input shaft having
axially shiftabl'e clutch gear drivingly `connected thereto,
Y
, 10. `In a transmission, a rotatable input shaft with `a
a clutch sleeve :axially shiftable and drivingly mounted
drive pinion and clutch means thereon, a rotatable out
on said clutch gear, another gear mounted Ion the output
shaft adjacent said yclutch gear 'and shift-able axially of
»and rotatable relative `to said output shaft, 'axial shift 'of
connected thereto, la clutch sleeve axially shiftable _and
said clutch sleeve being effective to selectively clutch
drivingly mounted on said clutch gear, and another gear
said input shaft and said other [gear to said output shaft,
mounted on the output shaft «adjacent said clutch gear
-a countershaft gear cluster rotatably supported :adjacent
shiftable axially of and rotatable relative -to ‘said output
Shaft with said other gear having clutch means thereon, 25 said input and 'output shafts having a first gear Icontinu
ously engaged with said input shaft drive pinion and a
axial shift of said clutch sleeve being effective to selec
second gea-r continuously engaged with said output shaft
tively lclutch said input shaft and said other gear to said
mounted other gear, and means arranged to be actuated
loutput shaft, a unitary countershañ gear cluster rotat
put shaft with `an axially shiftable clutch gear `drivingly
iably supported adjacent said input and output shafts hav
ing Ia first gear meshingly engaged with said input shaft
drive pinion and ia second gear meshingly engaged with
said output ‘shaft mounted other gear, and means to fric
tionally engage said output shaft mounted other gear
Iand prevent gear rattle noise, said friction means being
arranged to Vbe applied to said output shaft Ymounted
gear as a result of axial shift of said output shaft gear
as
to frictionally yengage at least one of said gears land pre
vent ‘gear rattle noise of the continuously engaged gears,
said friction means being arranged to be applied by the
axial shift of one of said axially shiftabl‘e gears as la re
suilt of torque transmission kby said lclutch gear.
13. In a'transmission, a rotatable yirrput shaft having
a `drive pinion thereon, a rotatable output `shaft with ian
‘axially sjhiftable clutch gear drivingly connected thereto
by an angled spline connection, a ‘clutch sleeve >axially
due to axial shift of said clutch gear when torque load
shiftable on «and drivingly connected to said clutch gear,
is transmitted thereby and comprising Va friction means
another gear mounted on the output shaft `adjacent said
mounted on said «output shaft and arranged to be brought
into abutting engagement rWith ya side face portion of 40 clutch gear and rotatablereliative to said output shaft,
axial shift of said clutch sleeve being effective to selec
said output shaft gear to limi-t 4axial shift thereof in one
tive'ly `clutch said input shaft .and said other gear to said
direction `and comprising a friction Washer and an ad
'output shaft, 'a countershaft gear cluster rotatably sup
jacent dished spring washer mounted on said output
ported 'adjacent said input and 'output shafts having ia
lshaft adjacent a side face portion of said output shaft
gear and arranged to be brought into/„abutting engage ' first gear meshingly engaged With »said input shaft ydrive
pinion .and a second gear meshingly engaged with said
ment with said output gear side facci-portion to limit
axial movement thereof in one direction.
11. In a çountersh‘aft rtype transmission, la rotatable
input shaft having 1a drive pinion and clutch means fthere
output shaft mounted lother gear, and means :actu‘able f
«to frictionally 'engage one of said meshingly engaged
gears 'and prevent gear rattle noise, said friction means
on, a coaxial rotatable output shaft having longitudinally 50 being arranged to be applied to said one gear by the 'axial
shift of said clutch gear along said ‘angled spline oon
extending helical splineways `along at least ía portion of
its peripheral surface, l‘a clutch «gear mounted on and
drivingly connected to said 'output shaft splineways for
shiftable movement therealong, la gear mount/ed on said
output shaft adjacent said clutch gear and free to rotate
relative to said output shaft, said output shaft mounted
gear having clutch means thereon, a yclutch sleeve driv
ingly connected to said clutch gear for the transmission
nection as a result of torque transmission by said clutch
gear.
References Cited in the file of this patent
UNITED STATES PATENTS
2,062,930
2,301,448
Pritchard ____________ __ Dec. 1, 1936
Peterson et al ________ __ Nov. 10, 1942
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