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@ci- 3, 1946-
'
c. p. PETERSON ET AL
2,499,143
SYNCHRONIZING CLUTCH CONSTRUCTION
Filed Jan. 20, 1945
2 Sheéts-Sheet 1v
3
IA'IVENTORS
‘
CHRL D. PETERSON
'POBERT RIBURKHHLTER
BY
5-5-4
{1-7-5
@DMLQ
ATTORNEYS
0653, 1946-
'
c. D. PETERSON ETAL
2,409,148
SYNCHRONIZING CLUTCH CONSTRUCTION
Filed Jan. 20, 1945
2 Sheets-Sheet 2
IN VEN TORS
CHR’L .D. PETERSON
51' 7-3
I
-
BY POBERT 7?.BURKHHL7'EI?
65 cw; * 3'
A T TOPNE Y5‘
_
Patented Oct. 8, 1946
2,409,148
UNITED STATES PATENT OFFICE
2,409,148
SYNCHRONIZING CLUTCH CONSTRUCTION
Carl 1). Peterson and Robert R. Burkhalter,
Toledo, Ohio
Application January 20, 1945, Serial Nib-573,731
6 Claims.
(Cl. 192-53)
I
2
This invention relates to synchronizing clutches
of the type including a jaw member and a fric
tion sleeve member around the jaw member, and
has for its object a simple and readily assembled
cylindrical band having internal friction rings
at its opposite ends. The member 4 is here shown
spring structure for normaly yieldingly coupling
as an integral or one-piece structure having a hub
and a peripheral annular flange 6 and sets of
clutch teeth 1 and 8 on the hub, on opposite sides
of the ?ange 6 for coacting with complemental
sets of internal teeth 2) and ill on cylindrical
?anges of the gears 2, 3, respectively. The hub
the sleeve member is stopped by engagement with
is here shown as slidably splined on a collar II
a complemental friction surface, and then yields
to permit the jaw member to shift relative to the 10 keyed at l2 to the shaft I. The annular flange 6
the friction sleeve member to the jaw member, so
that the two members shift axially as a unit until
is formed with transVerse arcuate slots extending
friction sleeve to engage a circumferential jaw
clutch surface, or has for its object a modi?ed
in a circumferential direction providing webs l4
form of the spring construction shown in our ,
between the ends of the slots. The outer rim of
the ?ange coacts with shifting means and extends
pending application, Serial Number 556,963, ?led
October 3, 1944.
15 into grooves in shoes or blocks IS on a shifting
fork IS.
The invention consists in the novel features and
The sleeve 5 is preferably formed up of sheet
in the combinations and constructions hereinafter
metal and provided with lengthwise slots IT at in
set forth and claimed.
tervals, which open through one end only of the
In describing this invention, reference is had
to the accompanying drawings, in which like 20 band, thus providing land portions or prongs l8.
Said portions or prongs extend through the ar
characters designate corresponding parts in all
cuate slots 13. The prongs are provided with
the views.
means for blocking engagement until the speeds
Figure 1 is a longitudinal sectional view of a
of the parts to be clutched together synchronize,
synchronizing clutch embodying this invention,
the adjacent portion of the coacting elements of 25 but this means forms no part of the invention.
The side edges of the prongs, which are the side
a transmission gearing being also shown.
walls of the slots H, are provided with notches for
Figure 2 is a sectional view on line 2-2,
coacting with the end walls of the webs [4 be
Figure 1.
tween the ends of the arcuate slots I3 to block
Figure 3 is a detail isometric view of the body of
the friction sleeve member.
30 shifting-in of the toothed clutch member until
the speeds are synchronized.
Figures 4 and 5 are respectively plan and edge
' The sleeve or friction member 5 is provided with
views of the spring forming the subject matter of
internal friction rings 2|, 23 at its opposite ends
this invention.
for coacting with complemental friction rings or
With the exception of the spring shown in Fig
ures 4 and 5, this clutch is of the same construc 35 faces 24, 25 on the gears 2 and 3, respectively.
In operation, the members 4, 5 ?rst shift as
tion as that shown in the pending application,
a unit and bring the friction ring 2| or 23 into
Serial Number 556,963.
frictional engagement with the complemental
In the drawings, the numeral l designates a
friction face 24 or 25 in accordance with the direc
driving element or shaft, and 2 and 3 driven ele
ments selectively clutchable to the driving element 40 tion in which the shift is made from neutral.
Continued shifting-in causes the member 13 to
I through the clutch construction. The driving
shift relatively to the sleeve or friction member
element, as here shown, is a shaft, and the driven
5 and bring the jaw 1 into engagement with the
elements, gears clutchable to the shaft, these being
jaw 9. or the jaw 8 into engagement with the jaw
gears in a train through ?nal drive or tail shaft of
a transmission gearing, although the reverse may 45 IS. The shifting of the jaw section 4 axially rela
tively to the friction sleeve 5 is normally yield
be the fact, that the shaft l is a driven shaft and
ingly resisted so that the two members shift as
the gears 2, 3, ?nal drive gears in trains actuated
a unit until the friction members are engaged,
by a prime moving shaft. The gears 2, 3 are here
by means comprising bow springs 28 extending
shown as rotatably mounted on or concentric
with the shaft I.
50 through the arcuate slots l3 and lengthwise of the
band or friction member 5 radially inward from
4 and 5 designate respectively the toothed or
the land portions or prongs 18, the bow springs
jaw member and the friction or sleeve member of
having spaced apart ‘bosses 3t struck therefrom
this clutch, the jaw member 4 being mounted on
at their apex portions, the bosses being spaced
the shaft I to rotate therewith and shift axially
thereof. and the friction sleeve member being a 65 apart in a direction axially of the clutch, and
2,409,148
4
3
the opposite faces thereof, the other being a fric
forming a depression or seat 3! centrally of the
tion member including a sleeve having length
spring for the inner walls in a radial direction
wise slots, the portions between the lengthwise
of the arcuate slots 13. Each of the springs 28
slots extending through the arcuate slots of the
is rectangular in general form in plan and is pro
vided with feet 32 at its corners, which abut 5 ?ange, said portions being formed to coact at
their side edges with the end walls of the arcuate
against the inner edges of the internal bands 2|,
slots to block relative shifting movement except
23, the end edges 33 between the feet‘ being spaced
when the speeds of the driving and driven ele
from the bands 2!, 23. The bosses 35 resist rela
ments approach synchronization, internal bands
tive axial shifting of the members 4, 5 until the
shifting of the friction member 5 is stopped and 10 at opposite ends of the ‘sleeve, and a bow spring
the inner walls of the arcuate slots to cam up the
inclined sides of the bosses, while the member 4
rectangular in general form extending through
each of the arcuate slots lengthwise of the sleeve
and coacting at its apex with the inner wall of
up into a band, as seen in Figure 3, and hence
with and shiftable axially of one of said elements
then continued shifting-in force applied causing
the arcuate slot and having feet at its corners
is shifting axially relatively to the member 5. The
feet 32 or the insetting of the end edges 33 of 15 abutting against the bands.
3. In a synchronizing clutch of the type shift
the spring causes the spring 28 to contact the
friction rings 2|, 23 at spaced apart points only - ~ able in opposite directions from neutral to con
nect together driving and driven elements
of small area. This construction frees the spring
through different speed ratios, including two
28 of the friction rings, and hence enhances the
?exibility of the spring. As the sleeve 5 is rolled 20 members, one being a toothed member rotatable
is a split band, the split opening into the end
into and'out of clutching engagement and having
diametrically opposite to the split in the sleeve
said portions being formed to coact at their side
35
or reinforces the margin of the split band 5 and
the friction ring 25 at that margin.
For the purpose of locating the friction rings
2|, 23, the band is provided with lugs 34 struck
therefrom. These lugs, however, form no part of 40
tangular in general form extending through each
of the arcuate slots lengthwise of the sleeve and
an annular peripheral ?ange, the ?ange being
of one of the lengthwise slots between the prongs
formed with arcuate slots extending through the
of the band, a reinforcing band 35 is provided
around the split end of the sleeve 5, this band 25 opposite faces thereof, the other being a friction
member including a, sleeve having lengthwise
being preferably a split ring or band rolled up
slots, the portions between the lengthwise slots
from the ?at strip into circular form. It is lo
‘
extending
through the arcuate'slots of the ?ange,
cated with its ends at the split out of line or
or band 5. The reinforcing band 35 is secured 30 edges with the end walls of the arcuate slots to
block relative shifting movement except when
in position by the same rivets or fastening mem
the speeds of the driving and driven elements ap
bers which secure the friction ring 23 to the band
proach synchronization, internal bands at oppo
5. This reinforcing band or ring 35 prevents any
;ite ‘ends of the sleeve, and a bow spring rec
outward distortion due to the centrifugal force,
this invention.
'
What we claim is:
1. In a synchronizing clutch of the type shift-.
able in opposite directions from neutral to con
coacting at its apex with the inner wall of the
arcuate slot and having feet at its corners abut
ting against the bands, the spring being pro
vided with bosses at the apex portion thereof
spaced apart in a direction lengthwise of the
sleeve forming a. depression at the apex portion
for receiving the wall of the arcuate slot, said
bosses coacting with the walls of the arcuate slot
nect together driving and driven elements
with a cam action.
through different speed ratios, including two 45 4. In a synchronizing clutch of the type shift
members, one being a toothed member rotatablev
with and shiftable axially of one of said elements
able in opposite directions from neutral to con
nect together driving and driven elements
into and out of clutching engagement and hav
through different speed ratios, including two
ing an annular peripheral ?ange, the ?ange be 0-0 members, one being a toothed member rotatable
ing formed with arcuate slots extending through
with and-shiftable axially of one of said elements
the opposite faces thereof, and a friction mem-,
into and out of clutching engagement and hav
ber including a sleeve having lengthwise slots
ing an annular peripheral ?ange, the ?ange be
extending through the arcuate slots of the ?ange,
ing formed with arcuate slots extending through
the portions between the lengthwise slots being . the opposite faces thereof, the other being a fric~
formed to coact at their side edges with the end 55 tion member including a sleeve having length
walls of the arcuate slots to block relative shift
wise slots, the portions between the lengthwise
ing movement except when the speeds of the driv
slots extending through the arcuate slots of the
ing and driven elements approach synchroniza
?ange, said portions being formed to coact at
tion, internal bands at opposite ends of the sleeve, , their side edges with the end Walls of the arcu
and a ‘bow spring extending lengthwise of each 60 ate slots to block relative shifting movement ex
of said portions and having its apex portion pro
cept when the speeds of the driving and driven
vided with spaced apart bosses providing a de
elements approach synchronization, internal
pression arranged astride the inner wall of the
friction bands at opposite ends of the sleeve, and
arcuate slot, with the bosses on opposite sides of ,> g a bow spring rectangular in general form extend
the ?ange in an axial direction, the spring thrust 6” ing through each- of the arcuate slots length
ing at its ends against the bands.
wise of thesleeve and coacting at its apex with
2. In a synchronizing clutch of the type shift
theinner walllof the arcuate slot, the spring
able in opposite directions from neutral to con
having spaced apart bearing points at its end
nect together driving and driven elements . edges contacting the edges of the friction bands,
through different speed ratios, including two 70 the end edges of the spring between the contact
members, one being a toothed member rotatable
points being spaced from the edges of the bands
with and shiftable axially of one of said elements
to maintain the ?exibility of the spring.
into and out of clutching engagement and hav
5. In a synchronizing clutch of the type shift
ing an annular peripheral ?ange, the ?ange be
able in opposite directions from neutral to con
ing formed with arcuate slots extending through 75 nect together driving and driven elements
2,409,148
5
6
through different speed ratios, including two
through different speed ratios, including two
members, one being a toothed member rotatable
with and shiftable axially of one of said elements
members, one being a toothed member rotatable
with and shiftable axially of one of said elements
into and out of clutching engagement and hav
ing an annular peripheral ?ange, the flange be
ing formed with arcuate slots extending through
the opposite faces thereof, the other being a fric
into and out of clutching engagement and hav
ing an annular peripheral ?ange, the ?ange be
ing formed with arcuate slots extending through
the opposite faces thereof, the other being a fric
tion member including a sleeve having lengthwise
slots, the portions between the lengthwise slots
extending through the arcuate slots of the ?ange,
said portions being formed to coact at their side
edges with the end walls of the arcuate slots to
block relative shifting movement except when
the speeds of the driving and driven elements
approach synchronization, internal friction bands
at opposite ends of the sleeve, and a bow spring
rectangular in general form extending through
each of the arcuate slots lengthwise of the sleeve
and coacting at its apex with the inner wall of
the arcuate slot, the spring having spaced apart
bearing points at its end edges contacting the
edges of the friction bands, the end edges of the
spring between the contact points being spaced
from the edges of the bands to maintain the flex
ibility of the spring, and the spring being pro
vided with bosses at the apex portion thereof
spaced apart in an axial direction lengthwise of
the spring providing a depression for receiving
the wall of the arcuate slot.
6. In a synchronizing clutch of the type shift
able in opposite directions from neutral to con
nect together driving and driven elements
tion member including a sleeve having length
wise slots, the portions between the lengthwise
10 slots extending through the arcuate slots of the
?ange, said portions being formed to coact at
their side edges with the end walls of the arcuate
slots to block relative shifting movement except
when the speeds of the driving and driven ele
15 ments approach synchronization, internal bands
at opposite ends of the sleeve, the sleeve being
a split band, the slots extending through one end
only of the sleeve of the split extending through
the closed end of one only of the slots, friction
20 bands secured to the ends of the sleeve within
the same, one of the bands extending across the
open ends of said slots, a reinforcing split band
encircling the margin of the sleeve at the open
ends of ‘the slots, the split of the last band being
out of line with that of the sleeve, and a bow
spring extending through each of the arcuate
slots lengthwise of the sleeve and coacting at its
apex with the inner wall of the arcuate slot and
thrusting at its ends against the inner edges
30 of the friction bands.
CARL D. PETERSON.
ROBERT R. BURKHALTER.
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