DE127349C

DE127349C -

Info

Publication number: DE127349C
Application number: DENDAT127349D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- Ja 127349 KLASSE 21 c.- Yes 127349 CLASS 21 c.

Patenürt im Deutschen Reiche vom 8. Januar 1901 ab.Patented in the German Empire on January 8, 1901.

Gegenstand vorliegender Erfindung ist eine Vorrichtung, mittelst welcher bei elektrisch betriebenen Maschinen eine Aenderung der Drehungsrichtung der Treibwellen verhütet werden soll, wenn ein Polwechsel und daher eine Aenderung der Drehungsrichtung der elektrischen Kraftmaschine eintritt.The present invention is a device by means of which at electrical operated machines prevent a change in the direction of rotation of the drive shafts should be when a pole change and therefore a change in the direction of rotation of the electric engine enters.

In beiliegender Zeichnung sind in Fig. ι und 2 sowie Fig. 4 und 5 zwei beispielsweise Ausfuhrungsformen der Sicherheitsvorrichtung in ihrer Anwendung bei elektrisch betriebenen Aufzügen dargestellt.In the accompanying drawing are in Fig. Ι and 2 and Fig. 4 and 5, two for example Embodiments of the safety device in their application in electrically operated Elevators shown.

Auf der Trommelwelle α der Aufzugmaschine sind lose die mit langen Naben versehenen Theile b c einer Trommel aufgesetzt, innerhalb welcher auf der Welle die beiden mit entgegengesetzt gerichteten Sperrzä'hnen versehenen Sperrräder de fest aufgekeilt sind. The parts bc of a drum provided with long hubs are loosely placed on the drum shaft α of the elevator machine, within which the two ratchet wheels de provided with oppositely directed ratchet teeth are firmly keyed on the shaft.

Die beiden Sperrräder sind in der Zeichnung zu einem Ganzen verbunden dargestellt, und steht dem Umfang jedes Zahnkranzes eine Sperrklinke f bezw. g gegenüber. Diese Klinken sind auf den am Trommeltheil b befindlichen Zapfen h i befestigt und werden für gewöhnlich durch Federn k gegen den inneren Umfang des Trommeltheiles c bezw. gegen in letzterem befindliche Laufflächen / m gedrückt und aufser Eingriff mit den Sperrrädern gehalten. Auf den Naben,der Trommeltheile b c sind die Kettenräder η ο befestigt, welche durch Kettenläufe mit den Gegenrädern rs der Welle ρ verbunden sind, welche den Anlafs- und Regulircontacthebel trägt. Das Kettenrad 5 ist auf der Welle befestigt, jenes r dagegen ist lose aufgesetzt und mit einem Haken t versehen, welcher den mit Gegengewicht u versehenen Einrückhebel y für gewöhnlich in solcher Stellung hält, dafs. der auf der Welle ρ befindliche Kuppelungsmuff w aufser Eingriff mit den am Rade r befindlichen Kuppelungsklauen bleibt.The two ratchet wheels are shown connected in the drawing to form a whole, and there is a pawl f BEZW the circumference of each ring gear. g opposite. These pawls are attached to the pin hi located on the drum part b and are usually c respectively by springs k against the inner circumference of the drum part. pressed against in the latter located treads / m and held out of engagement with the ratchet wheels. On the hubs, the drum parts bc , the chain wheels η ο are attached, which are connected by chain runs with the counter wheels rs of the shaft ρ , which carries the starting and regulating contact lever. The chain wheel 5 is fastened to the shaft, while that r is loosely attached and provided with a hook t which usually holds the engagement lever y provided with counterweight u in such a position that. the coupling sleeve w located on the shaft ρ remains out of engagement with the coupling claws located on the wheel r.

Die Wirkungsweise der Einrichtung ist folgende : Steht der Contacthebel in der Nullstellung, so dafs kein Strom in die elektrische Kraftmaschine treten kann, so haben die erwähnten Theile die Stellung zu einander, wie in Fig. ι und 2 dargestellt. Dieser Stellung des Contacthebels entsprechend stehen alsdann auch die beiden an den Trommeltheilen bc befindlichen Warzen \ einander gegenüber. Wird nun der Contacthebel beispielsweise in solcher Richtung gedreht, dafs durch den Kettenradtrieb s 0 der Trommeltheil c in Richtung des Pfeiles χ (Fig. 2) auf seiner Achse α verdreht wird, so , dreht sich auch bei der nun gleichzeitig erfolgenden Drehung der elektrischen Antriebmaschine die Welle a in dieser Richtung. Die Laufflächen I und m für die Klinken f g bilden keine geschlossenen Ringe, sondern nur Halbkreise, und zwar erstreckt sich erstere von 1 bis 2, die andere von 3 bis 4; bei der Nullstellung des Contacthebels liegen die Klinken mit zwei zu beiden Seiten ihres Drehpunktes befindlichen AnsätzenThe mode of operation of the device is as follows: If the contact lever is in the neutral position, so that no current can enter the electric power machine, the parts mentioned have the position relative to one another, as shown in FIGS. Stand this position of the contact lever corresponding then the two at the Drums Healing bc located warts \ opposite each other. If the contact lever is now rotated, for example, in such a direction that the drum part c is rotated in the direction of arrow χ (Fig. 2) on its axis α by the sprocket drive s 0, the electric drive machine also rotates with the now simultaneous rotation the wave a in this direction. The running surfaces I and m for the pawls fg do not form closed rings, but only semicircles, the former extending from 1 to 2, the other from 3 to 4; When the contact lever is in the zero position, the pawls are located with two approaches located on either side of their pivot point

Claims

5, 6 against the running surfaces, so that the pawls cannot have any effect at all in this position. However, after the Trotnmeltteil c is further rotated in the aforementioned sense when the electrical machine is started up, the pawl / with its nose leaves the running surface /; Since the springs k encompass the secondary circumference of the ratchet wheels with considerable force, the rotary movement tries to spread the springs and take them along in the direction of the arrow χ, so that the pawl f, even after the lug 6 has left the surface I, is held up by its spring and with it the nose 5 is pressed against the drum surface, while the nose 6 protrudes from the drum surface. If a pole change suddenly takes place, i.e. a rotation of the shaft α and the ratchet wheels on it in the direction of the arrow y, the pawl f is rotated by the spring k which influences it so that it comes into engagement with the ratchet wheel d (Fig. 3). Then the drum shaft α is coupled to part b, and the rotation of the mating wheel r now caused by the chain wheel η causes the lever ν to be triggered and the sleeve w to be coupled to the wheel r. The latter now causes a rotation of the shaft p until the contact lever located on it reaches the neutral position and thereby the current line is interrupted To bring the wheel r and then to turn the hook t downwards so that the lever ν can be placed on it again; by this rotation of the wheel r, the nipple on the drum part b is brought again opposite the nipple on c, at the same time the pawl f released from the ratchet wheel d and pushed onto the running surface /. If the movement of the contact lever occurs in the direction of the arrow, then in the event of a pole change, the pawl g and the ratchet wheel e come into effect in a corresponding manner, and then the hook makes t when the lever ν is triggered, the opposite rotation as in the other case .. According to the arrangement of FIGS in a slightly different way when the polarity is changed. As a result of the drum part b, which is usually stationary, the lever 8 with the contact bridge 7 located on it is pressed against the ends of the two lead wires 9 and 10, for which purpose a resilient, front-insulated punch 11 is located in b. If the coupling of the drum parts b c occurs when incorrect rotation occurs, the punch 11 releases the lever 8, which is then snapped upwards by a spring. Godfather τ-An Proverbs:

1. Safety device in electrically driven machines against changing the direction of rotation by changing the pole, characterized in that a ratchet wheel is fixedly attached to the shaft to be driven α and a holder for a pawl is placed loosely next to it, so that when the pole changes and the direction of rotation of the pawl carrier is coupled to the shaft by the ratchet wheel and a switch is opened by the pawl carrier.

2. Embodiment of the safety device according to claim 1, characterized by the arrangement of two ratchet wheels (de) with oppositely directed teeth and two pawls (fg) inside a two-part, loose on the shaft to be driven (a) seated switching drum, parts of which the one (c) with suitable surfaces (I m) the pawls (fg) usually against engagement iii (de) secures the ratchet wheels and is connected to a gear wheel (r) attached to the selector shaft (p) , while the other (b) the

'carries both pawls ff gj and is connected to the toothed wheel (r ) sitting loosely on the shift shaft (p) , which usually holds the engagement lever (v) of an associated coupling sleeve (n>) , so that by turning the shift lever in one direction or the other and thereby made Schliefsung of the current of a Drums Heil (c) is rotated against the other half, and depending on the direction of rotation the one of the pawls (f S) ^of ^ ^{he s'} ^e retentive surface (Im) is removed and replaced a spring (k) is provided so, that they at a pole change the pawl into engagement with the Sperrrade brings and by rotation of the Drums salvation (b) the engagement of the coupling sleeve (w) of the loosely on the switch shaft (pj seated wheel (R) and causes the shift lever to be returned to the open position.

1 sheet of drawings.