close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2408180

код для вставки
Sept 24, 194.5-
.
'r.l J. s'cHuETzrrAL
FRICTION BRAKE
. y2,408,179 ' -
'
¿yl [wmfffm»
Sept. v24, 1946..,l
J.' scHuETz >E'rm. _
2,408,179
FRICTION BRAKE 4
Filed July 1o, -1945
4 Sheets-Sheet 3
w.
ff
/4
'
œ
@y
_Mm
vSept,„24, 1946.
' - fr. J. sclfluETz :r'AL I
`
. -'
FRIcKTIoN
BRAKE"
'2,408,179
`
_
Filed J'ul'y 1o, 1945
'-
`
' 4'sn'èets-Vsneef 4
l
42
/l
\
\\\\
im»
//7'1/e/7 for :
.
2,408,179
Patented Sept'. 24, 1946
Thomas
Tulsa, Okla.,
J. séhuetz
Aassignors,
and by
Edwin
mesneW.assignments,
'rúmqùist
A o John E. ÄMabee,.,'Ihon'nas J. _S'chi'xetz,` and
Logan Stephenson, all of Tulsa, Okla. I.
y l ‘
`> 'ApplicationJuly 10, 1945, Serial No. ,'604202
' - 'facial-rms.
(criss-s2)
circular track ~2-Iengaged by yrollers 22„«positioned
~- rlî‘his invention relates Ytoimprovements.in fric->
‘ tion brakes and more -p_articularly’to automatic
.brakes for use `with a Worm drive >of a hoisting
J apparatus. .-A brake of this -ftypeis shown in the
in notches 23,` arranged in spaced relation about
the periphery of ya roller carrierv or clutch member
T. J .'Schuetz Patent 1,870,532, August 9, 1932, and
the shaft, as indicated at 25, and is Yprovided with
the action and function. of the improved brake
y tangential Wells 26 for the reception of coil springs
24. - AThelatter is keyed to the extension I0 of
'is similar to that disclosed in said patent.
21 that force- pistons 28, guided by the.. Wells,
~. 'v vOne of the objects of the present invention is
against the rollers22 and force them toward the
inclined end surface 29 of the member 24. It will f
to provide'. improved means for use in adjusting
the brake elements.
10 be Yobvious thatthis construction will permitthe
'
Another object is to'supply improved spring
shaft and roller carrier to travel counter-,clock
. means for forcing friction discs into tight engage
wise (Fig. 5) vwithout moving the race ring I1, but
ment with one another, and novel means for ad
should the shaft attempt to turn inthe opposite
direction, the'spring-pressed pistons would cause'
justing the. spring means from theexterior of
-' the apparatus.
"
l
the rollers. to move` up the inclined surfaces of .the
-
.notches and .thusbind the rollers against the race
ring I1, for braking purposes, as will be explained
With the foregoing objects outlined and With
other objects in View, which will appear as the
description proceeds, the -invention consists of
the novel features hereinafter described in detail,
illustrated in the accompanying drawings and
more particularly pointed out in Íthe appended
claims.
lIn the drawings: `
-
'
'
_ further.
„Another friction ring 30 bears against the outer
side ofthe disc I9, and a pressure plate k3| bears
„ against the opposite side of the plate „30. '
the ring I2 to effect friction between the brake
-
Fig. 1 is- an elevation of an end portion of the
l new braking mechanism.-
1
y
Fig. 2 isa vertical longitudinal sectional View
taken on the line 2-2 of Fig. 1.
,
The pressure plate is yieldingly forced toward
A.
d
I
Fig. 3 is a horizontal sectional View on the line
3-3 of Fig. 1.
Fig. 4 is a transverse sectional View on the line 30
4-4 of Fig. 3.
Figs. 5 and 6 are similar views on the lines
, 5-5 and 6--6 respectively of Fig. 2.
parts, by means of a leaf spring' 32 which may
have its medial yportieri secured -to a bolt 33 by
meansof clamping plates '34 mounted on the bolt.
The ‘bolt is> arranged co-axial with the shaft and
the Aends of lth'e leaf spring constantly bear upon
the pressure' disc at 3| at Adiarnetrically opposite
points.
f
For the purpose of moving the bolt toward and '
away from the shaft, the threaded portion 35
of the bolt engages internal threads 36 in a nut
31 which has a cylindrical portion 38 swivelled
ventional hoisting machine housing containing 35 in a cylindrical bore 39 of a cover 40. At this
point, it will be noted that the parts I2,- I4 and
a worm gear shaft 8, the worm gear 9 of which
40 may be secured together by any suitable means,
is arranged for engagement with the drum gear
Referring to the drawings, 1 designates a con
such. as screws 4I, which extend through aper
(not shown). In accordance with the present in
tures 42 in these parts and are anchored in the
vention, the shaft 8 is extended and projects be
_
'
yond the boundaries of the housing 1., being re 40 housing 1.
To prevent relative turning of the pressure plate
duced at its end portion I0 (Figs. 2 and 3). The
3| and cover 40, the former is provided with lugs
shaft is j ournalled in a suitable anti-friction-bear
43 which may vbe welded to the plate and project
ing I I, mounted in a ring I 2 which extends snug
outwardly into bifurcations 44, provided at the
ly within an aperture I3 of the housing.
A stationary housing collar I4 projects from 45 inside of the cover. The cover is preferably pro
vided at 180° to the bifurcations 44 with diametri
the ring and arranged within the collar is a fric
cally opposite bifurcations 45 (Fig. 4) which serve
tion disc I5, bearing at one side against the outer
as confining means for the leaf spring.
surface of the ring I2, as indicated at I6. A race
For adjustment purposes, an adjustable disc 46
ring or clutch casing I1, also positioned within
the collar, is arranged between a pair of friction 50 is arranged at the exterior of the cover and con
nected to the latter by screws 41 which extend
discs I8 and I9 that project radially beyond the
through substantially semi-circular slots 48 in the
race ring and are iixedly connected to one an
other by rivets 20 or the like which extend'through
disc and are anchored in the cover. The central
portion of the disc is provided with an angular
the outer race ring.
As shown in Fig. 5, the race ring has an inner 55 aperture 49 to snugly receive the angular head 50
2,408,179' Y
3
4
plurality of friction plates secured together with
of the nut 31. Due to this construction, it will
a clutch casing interposed therebetween, a clutch
member fixed on the shaft and rotatable there
be understood that if the disc 46 is turned in one
direction, the medial portion of the leaf spring
with, within said clutch casing, said clutch be
will be moved toward the shaft 8 to increase the
ing adapted to rotate freely in one direction and
engage said friction plate lunit when force is ap
plied in the reverse direction, and a pressure
friction between parts I5, I 8, I9, 30 and 3|, but
if the disc is turned in thel opposite direction,
the friction will be reduced.
member adapted to normally prevent the rota
It will be observed that the parts are so con
tion of said unit, the improvement comprising
structed and arranged that lubricating oil from
within the housing -I may ñow to and from the 10 a cover for the housing having a central aper
ture, a nut rotatably mounted in said aperture, a
braking mechanism, and that gaskets 5I are em- `
disc fixed to the external portion of the nut for
ployed, where necessary, to prevent the escape of
rotation therewith, means for locking the disc
oil.
r
to the cover, a bolt having threaded connection
From the foregoing, it _is believed that the
construction, operation and advantages o-f the 15 with _the nut, a leaf spring having its end por
tions operatively connected to the pressure mem
improved mechanism may be readily understood
ber andV its medial portion secured to the bolt,
by those skilled in the art, and we are aware
and means for preventing the pressure member
changes may be made in the details disclosed,
and vspring from turning about the axis of the
Without departing from the spirit of the 'inven
tion, as expressed in the following claims.
20 shaft.
' 3. In braking mechanism of the character de
' scribed,:a pressure member, a housing in which
What we claim and desire to secure `»by Letters
Patent
is:
-
»
,
«
Y
i
the pressure member is arranged, a nut rotat
1. In a friction'braking mechanism of the type
ably mounted in a wall of the housing, a disc
comprising a shaft having a portion arranged
within a housing, a friction plate unit in the 25 arranged at the exterior of the housing and op
eratively connected to the nut for rotating the
housing surrounding the shaft and comprising a
latter, means for locking the disc to the housing,
plurality of friction plates secured together with
a bolt having threaded connection with the nut,
a clutch casing interposed therebetween, a clutch
a leaf spring having its end portions operatively
member fixed on the shaft and rotatable there
with, within said clutch casing, said clutch be 30 connected to the pressure member and its medial
portion secured to the bolt, and means for pre
ing adapted to rotate freely in one direction and
venting the pressure member and spring from
engage said friction plate unit _when force is ap
turning about the axis of the bolt.
plied in the reverse direction, and a pressure
4. In friction braking mechanism of the char
member adapted to normally prevent the rotation
acter
described, a pressure member, a housing in
of said unit, the improvement comprising a leaf 35
which the pressure member is arranged, a thread
spring having its ends operatively connected to
ed member rotatably mounted in a wall of the
the pressure member, and meansV operable from
housing, a disc arranged at the exterior of the
the exterior of the braking mechanism for ad
housing and connected to the threaded member
justing said spring to increase or decrease pres
for rotation therewith, means for locking the
sure of the spring on the pressure member, said 40 disc'to the housing, a second threaded member
means including a threaded member, and a rol
tatable disc o-perably connected to the threaded
member and arranged at the exterior of the brak
ing mechanism.`
.
2. In a friction braking mechanism of the type
f comprising a shaft having a portion arranged
within the housing, a friction plate unit in the
housing surrounding the` shaft and comprising a
having threaded connection with the iirst thread
ed member, and a leaf spring having its end
portions operatively >connectedrto the pressure
45 member and its medial portion secured to the
second threaded member.
Y
THOMAS J. SCHUETZ.
EDWIN W. TURNQUIST.
Документ
Категория
Без категории
Просмотров
0
Размер файла
501 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа