close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3077973

код для вставки
Feb. 19, 1963
Filed 001;. 20. 1959
K. VCLKER
ROTARY CLUTCH FOR USE BETWEEN ROTARY
ELECTRIC SWITCHES AND THEIR DRIVE
3,077,363
2 Sheets-Sheet 1
.IWVENTOR.
KW L_ V65 L KER
‘H15 Asa/r
Feb. 19, 1963
K. VCLKER
3,077,963
ROTARY CLUTCH FOR usE BETWEEN ROTARY
9 ELECTRIC SWITCHES AND THEIR DRIVE
Filed Oct. 20. 195
2 Sheets-Sheet 2
United States Farent
1
ice
3,0773%
Patented Feb. 19, 1963
2
3,077,963
ROTARY CLUTCH FOR USE BETWEEN ROTARY
ELECTRIC SWITCHE§ AND TIEER DRIVE
Karl Viillrer, Vienna, Ausnia, assignor to
Hubert Laurenz, Naimer, Vienna, Austria
Filed Oct. 2%, 1959, Ser. No. 847,613
?laims priority, application Austria Oct. 29, 1958
12b. The coupling elements 12 are designed to be radi
ally adjustable relative to the two clutch halves 1t), 11 in
a manner which will be described hereinafter so that they
can fall into openings 13 of the second clutch half 11
and in this position couple the clutch parts 10, 11 by
means of the pins 12b. In this condition a torque acting
on part 1% is transmitted to part 11 and consequently to
‘the switch 1.
4 Claims. (Cl. 192-.02)
The coupling elements 12 are guided in slots 14a of an
The present invention provides a rotary clutch for use 10 intermediate member 14, which is rotatable with some
between rotary electric switches and intermittently act
friction in a housing 15 relative to the ?rst clutch part
ing drive means, particularly rotary magnets, associated
10. The guide pins 12b of the coupling elements 12 slide
therewith. It is an object of the invention so to design
in eccentric slots 16a of the clutch half 10. The clutch
such a clutch that the switch can be selectively turned
described thus far operates as follows:
either by hand as desired-for this purpose it carries a 15
The position in which the parts are shown is the posi
turning grip at one end of its shaft-or by electric re
tion of rest. If the clutch half 10 is turned by the drive
mote control by operating the drive means acting on the
means in the sense of arrow A the coupling elements 12
other end of the switch.
are ?rst radially outwardly displaced by their pins 12a
It is not dii?cult to solve this problem if a torque trans
sliding in the eccentric grooves 10a because the inter
mitting means driving only in one direction is provided 20 mediate member 14 is braked and does not follow the ro
between the drive means and the switch if the switch need
tation of the half 10. This braking may be effected in
to be turned by hand only in that direction which is per
any desired manner by friction or in that part 14 is braked
mitted by the means driving only in one direction. This
by pressure rollers 16 provided at the stationary housing
restriction that the switch can be operated only in one
15, as will be described in more detail hereinafter. After
direction of rotation, however, is incompatible with or at 25 the clutch half 10 has been rotated through a certain
least highly detrimental in numerous ?elds of application
angle [3 (in the example shown this angle ,8 equals 60")
and does not eliminate the problem of providing a clutch
the coupling elements reach the grooves 13 and have
which is free of this restriction.
fallen into the same, see position 12'. The several parts
The present invention solves the problem mentioned
are so designed that the length of the grooves 10a (angle
initially hereinbefore in that the drive has connected there 30 13) is so determined in view of the depth of the cuts 13
to a ?rst clutch half, which by means of coupling ele
that in position 12' the guide pins 12b have also reached
ments which are radially displaceable relative to it ad
the end of grooves 10a, which means that the coupling
justs a second clutch half mounted on the switch shaft as
pins have reached position 12’ and are now driven by
soon as a certain angle of lost motion has been exceeded,
the ?rst clutch half 10 in the direction of rotation of
which coupling element is disengaged from the second 35 clutch part 16 so that the clutch half 11 and with it the
clutch half when the ?rst clutch half is at rest.
switch 1, FIG. 1, and by means of the walls of grooves
In the diagrammatic drawing FIG. 1 shows the entire
14a the intermediate member 14 are also driven. It is
arrangement of the switch, clutch and drive means where
thus achieved that the drive means idles for a certain
as FIGS. 2, 3 show an illustrative embodiment of the
time, which corresponds here to the angle 5, as is of
40
present rotary clutch, FIG. 2 being a vertical sectional
critical signi?cance for rotary magnet devices having a
view taken on line II—II of FIG. 3 and FIG. 3 being a
lost motion and energy storage according to my afore
transverse sectional View taken on line III—III of FIG. 2.
mentioned copending application, and ‘that a contact be
As has been indicated initially hereinbefore the problem
tween the coupling elcments 12 and the cuts 13 is estab
resides in that a switch which consists of several switch
lished over a su?lciently large area before the switch is
45
units 1 and a stepping mechanism 2 and which is mounted
rotated so that the wear of the parts is reduced as the
in a manner which is not of interest in this connection by
pressure per unit of area is now small.
means of a carrying plate 3 in a carrier 4 is to be op
As soon as the torque transmitting connection between
erated by the rotary magnetic drive means 5 and the
the clutch halves 10, 11 has been established because the
clutch 6 and selectively also by the grip 7, which should
lost motion has been performed the switch will be turned
be rotatable in either direction whereas the rotary mag
through a certain angle. It may be assumed that this ro
net 5 switches only in one direction. This rotary mag
tation amounts, e.g., to 180° for one switching step. As
netic drive means may be, e.g., as described in my co
the drive means is of the intermittent type the clutch half
pending application Ser. No. 831,561, ?led on August 4,
10 returns to its initial position apparent from the draw
1959, now US. Patent No. 3,029,327.
‘
ing when the driving torque has disappeared because part
The rotary magnetic drive means 5 includes a station
10 is returned to this position by the return spring pro
ary electromagnet 5’ the windings of which are connected
vided in the magnet. Owing to the braking of the inter‘
to terminals 18', and a movable rotary armature 5" which
mediate member 14 this return movement causes ?rst a
acts as an energy storing ?ywheel. When a suitable volt
retraction of the coupling elements 12 from the cuts 13,
age is applied to the terminal 18', the armature 5" is
the pins 12b being guided from position 12’ back to the
angularly displaced and tensions a spring 25. When cur 60 initial position shown, and ?nally, as the pins 12b reach
rent ?ow is interrupted, the spring returns the armature to
the ends of grooves 10a as shown in FIG. 3, also a return
its initial position.
The rotary clutch consists according to FIG. 2 of a
of the intermediate member 14 which rotates with the
clutch part 10 which continues to run whereas the ad
?rst clutch half 10, on which the intermittently rotating
vanced second clutch half 11 is no longer returned be
drive means, which springs back to its initial position 65 cause the coupling connection between coupling elements
after each incremental rotation, acts, e.g., by means of
12_and coupling half 11 no longer exists.
connecting elements 9, and of a second clutch half 11,
Depend-ing on the switching angle performed by the
which must be considered rigidly coupled to the switch
drive device per switching step a larger or smaller num
shaft 8 (FIG. 1). Coupling elements 12, in the present 70 ber of cuts 13 must be provided in the clutch half 11
case two of them, are provided between the two clutch
or, in other words, the pitch angle of the cuts 13, which
halves 10, 11 and consist of a plate 12a and a guide pin
is assumed to be 180° in the example shown, must agree
3,077,963
4
3
arc length of groove 14b being equal to or somewhat
smaller than the angle ,6 so that after a rotation through
the angle ,8 or somewhat earlier the extension 1% reaches
‘the end of the recess 14b so that the intermediate ele
Ernent 14 is driven by the ?rst clutch member 10 and
with the switching angle of the drive means. In practice
a switching angle of 180° would be unusually large but
it is apparent that the present clutch may be designed
for any desired switching angle because the latter de
pends only on the setting of the drive means and on the
distribution of the cuts 13 rather than on the angle 5
the torque is now transmitted by parts 10, 101'), the wall
of lost motion, which depends on the dimensional rela
oi slot 14b, grooves 14a, 12, the wall of cuts 13 and
tions of the drive means, as has been set forth in detail
1 .
What is claimed is:
1. A switch arrangement comprising a driven clutch
As the clutch half 11 connected to the switch shaft 10
member and a driving clutch member rotatable about a
is not connected to the intermediate member 14 and the
common axis; drive means connected. to said driven
?rst clutch half 10 in normal condition, when the drive
in the above-mentioned patent speci?cation.
clutch member for actuating oscillating movement of
means is at rest, the switch 1 can be turned as desired
in both directions with a turning grip 7 carried thereby.
The generally cylindrical circumferential face of the
. said driven member about said axis through a predeter
15 mined angle; rotary switch means connected to said
intermediate member 14 is provided with a radially pro
jecting cam 18, which cooperates with a roller 16.
The roller 16 is rotatably mounted on a slide 29 which
is guided for radial movement in the housing 15. 'The
roller is urged into abutting engagement with the afore
mentioned circumferential face of the intermediate mem
ber 14 by springs 21 which abut against the slide 20 and
the housing 15. The slide carries an actuator button
22 which is an element of a switch also including two
conductive contact blades 17’. The blades are mounted
in the housing 15 in such a manner that one of the blades
is resiliently moved into contact with the other blade
by the actuator button 22 when the cam 18 moves the.
slide 20 radially outward against the restraint of the
springs 21. The switch, the terminals of which are in
dicated at 17 in FIG. 1 lies in the current supply circuit
of the rotary magnetic drive means the terminals of which
are indicated at 18’ in FIG. 1 and is designed to be closed
when the return rotation of the clutch half 10 has been
completed so that the magnet 5’ receives again a current 35
driving clutch member for actuation thereby; a coupling
member; and motion transmitting means connected to
said clutch members for consecutively moving said cou
pling member from a ?rst inoperative position to a
second inoperative position, and hence to an operative
position in which said coupling. member simultaneously
engages said clutch members for transmitting movement
from said driven to said driving member, when said
driven clutch ‘member consecutively moves relative to
said driving member in one direction through predeter
mined ?rst and. second portions of said angle respectively,
and for consecutively moving said coupling member from
,said operative position to said second and said ?rst inop
erative position when said driven member moves rela
tive to said driving member in the other direction through
said second and ?rstportions of said angle respectively.
2. A switch arrangement as set forth in claim 1, Where
in said motion transmitting means includes an intermedi
ate member formed with radial guides and brake means
yieldably braking movement of said intermediate mem
pulse of adequate duration whereby the magnetic drive
ber, when said driven member is. moved by said drive
means is caused to perform another forward rotary step
‘means about said axis, said driven clutch member is
in its oscillating movement; as a result, any desired se
formed with oblique guides and said coupling member
from synthetic thermoplastics, suitably of the polyamide
the supply of current to said drive means.
includes a coupling portion engaging one of said guides
quence of switching pulses is performed as long as the.
command switch included in line 19 remains closed. As 40 in said intermediate member and, an extension engaging
one of said guides of said driven clutch member.
this is assumed to be a remote control, back-signalling
3. A switch arrangement as set forth in claim 2, fur
means will be provided in known manner which signal
ther comprising means for transmitting torque between
the position. reached by the switch back to the command
the driven clutch member and the intermediate member
station.
One advantage of the present rotary clutch resides in 45 after said coupling member has been moved from said
?rst inoperative position’to said- operative position.
that the amount of idle rotation is exactly predetermined,
4. A switch arrangement as set forth in claim 2, in
which is signi?cant for a satisfactory operation of a rotary
which said drive means is electrically actuated, said
magnet drive in which the switching energy is stored.
arrangement further comprising control means actuated
Even if the switch to be driven has large dimensions
the several parts of the present clutch may be made 50 by movement of said intermediate member to control
or superpolyamide base type because the ensured idle
movement causes the transmission of the full torque
to be delayed until the coupling elements 12 have reached
their extreme position 12'. In order to avoid a subse- 55
quent transmission of the full switching torque by the
extensions 12b of restricted size, additional transmitting
means, suitably in the form of bolts 10b which protrude
from part 10 and extend into grooves 14b» of the in
termediate element 14 (or vice versa) may be provided 60
between part 10 and the intermediate element 14, the
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,119,938
1,163,298
Dustin et al. __.._..._____ __ Dec. 8, 1914
Winkler _______ ________ __ Dec. 7, 1915
1,955,200
Millican _____ __,..___,_...__ Apr. 17, 1934
69,560
Norway _____________ _._ Aug. 27, 1945
FOREIGN PATENTS
Документ
Категория
Без категории
Просмотров
0
Размер файла
433 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа