DE19853538A1

DE19853538A1 - Mechanical torque intensifier, has two shafts rotationally located on same axis in housing by at least one magnet arranged eccentric at first shaft, with poles displaced against each other in axis direction of shafts

Info

Publication number: DE19853538A1
Application number: DE19853538A
Authority: DE
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-22
Filing date: 1998-11-20
Publication date: 2000-03-23

Abstract

The intensifier has two shafts rotationally located on the same axis in a housing. There is at least one magnet arranged to be eccentric at the first shaft, and at least one other second magnet arranged at the second shaft. The poles are displaced against each other in the axis direction of the shafts. The torque intensifier is designed with two shafts (4,6), rotationally located at the same axis in a housing, by at least one magnet (2), arranged eccentrically at a first of the two shafts. The magnet poles are displaced against each other axially. There is a pole shoe ring (1) consisting of a ferromagnetic material, lying adjacent, which surrounds the axis of the second shaft (6). There is at least one second magnet (5) at the second shaft (6). The poles of the second magnet are displaced in the axis direction of the shafts (4,6) and lie respectively adjacent to one of the pole shoe rings (1). The magnetic field due to the second magnet works in conjunction with the magnetic field of the first magnet (2), across the pole shoe rings (1). The like poles of the first magnet (2) and of the second magnet (5) are adjacent. The pole shoe rings are held respectively at or in the housing.

Description

Die Erfindung bezieht sich auf einen Drehmomentverstärker gemäß Oberbegriff Patentanspruch 1.The invention relates to a torque amplifier according to the preamble Claim 1.

Aufgabe der Erfindung ist es, eine mechanische Anordnung zu schaffen, die es ermöglicht, bei unveränderter Drehzahl ein eingebrachtes Drehmoment mittels statischer Magnetenergie in einem begrenzten Bereich zu verstärken.The object of the invention is to provide a mechanical arrangement that it allows an introduced torque by means of unchanged speed to amplify static magnetic energy in a limited range.

Zur Lösung dieser Aufgabe ist ein Drehmomentverstärker entsprechend dem Patentanspruch 1 ausgebildet.To solve this problem is a torque booster according to the Claim 1 trained.

Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen:The invention is explained in more detail below with reference to the figures. Show it:

Fig. 1 und 2 den prinzipiellen Aufbau des Drehmomentverstärkers bei verschiedenen Drehstellungen der ersten (antreibenden) Welle; Fig. 1 and 2, the basic construction of the torque amplifier at different rotational positions of the first (driving) shaft;

Fig. 3 in vereinfachter Darstellung einen Schnitt durch den Verstärker der Fig. 1 und 2. Fig. 3 in a simplified representation a section of the amplifier of FIG. 1 and 2.

Der prinzipielle Aufbau ist in Fig. 1 und der Gesamtaufbau im Schnitt in Fig. 3 dargestellt.The basic structure is shown in Fig. 1 and the overall structure in section in Fig. 3.

Zwischen zwei Scheiben aus ringförmig angeordneten, magnetisch leitenden Segmenten 1 befinden sich zwei Magnete, der eine ist als Ringmagnet 2 dargestellt und befindet sich auf dem Exzenter 3 der Antriebswelle 4, der zweite Magnet 5 hat die Form eines Ringsegmentes, steht mit der Ausgangswelle 6 in Verbindung und weist vorzugsweise eine schwache Keilform mit in Drehrichtung zunehmendem Querschnitt auf, alternativ eine mäßige Sichelform. Between two disks made of magnetically conductive segments 1 arranged in a ring there are two magnets, one of which is shown as a ring magnet 2 and is located on the eccentric 3 of the drive shaft 4 , the second magnet 5 is in the form of a ring segment and is in contact with the output shaft 6 Connection and preferably has a weak wedge shape with increasing cross-section in the direction of rotation, alternatively a moderate sickle shape.

Die Funktion besteht darin, daß die Magnetfelder gleich gepolt sind und der äußere Magnet aufgrund der Abstoßung größtmöglichen Abstand zum Magnetfeld des Exzenters sucht, wobei auf ihn tangentiale Kräfte wirken, auf den Exzenter hingegen wirken mit zunehmender Last auch radiale Kräfte, wie dies in Fig. 2 durch Pfeile angedeutet ist. Dadurch verkleinert sich der wirksame Radius, auf den sich das Magnetfeld abstützt und die radiale Komponente wird vom Lager der Antriebswelle aufgefangen, somit wird das erforderliche Antriebsdrehmoment geringer und dies entspricht einer Verstärkung.The function is that the magnetic fields have the same polarity and the outer magnet seeks the greatest possible distance from the eccentric magnetic field due to the repulsion, whereby tangential forces act on it, while radial forces act on the eccentric with increasing load, as shown in Fig. 2 is indicated by arrows. This reduces the effective radius on which the magnetic field is supported and the radial component is caught by the bearing of the drive shaft, thus reducing the drive torque required and this corresponds to an amplification.

Die Darstellung in Fig. 2 macht zudem ersichtlich, daß über diese Position hinaus das Maximum überschritten wird, das Drehmoment kollabiert anschließend, ein mechanischer Anschlag kann den totalen Abriß verhindern.The illustration in FIG. 2 also shows that the maximum is exceeded beyond this position, the torque then collapses, and a mechanical stop can prevent total demolition.

Fig. 1 und die Schnittdarstellung in Fig. 3 beruhen auf einem ringförmigen Magneten auf dem Exzenter, dies ist nur eine Alternative und diese bedarf der Sammelringe 7 aus Weicheisen, das Gegengewicht 8 an der Antriebswelle und das Gegengewicht 9 gegenüber dem Magneten 5 verhindern eine Unwucht. Zur Vermeidung von Wirbelströmen müssen die Segmente in geeigneter Weise lamelliert sein, oder aus Ferritmaterial hergestellt werden, eine Kombination mit eingebetteten, radialen, weichmagnetischen Blechstreifen ist möglich, aber ebenso nur entsprechend geformte Blechstreifen, die an den inneren und auch äußeren Enden verschweißt sind und möglichst von einer Gießmasse stabilisiert werden. Fig. 1 and the sectional view in Fig. 3 are based on an annular magnet on the eccentric, this is only an alternative and this requires the collecting rings 7 made of soft iron, the counterweight 8 on the drive shaft and the counterweight 9 against the magnet 5 prevent imbalance . To avoid eddy currents, the segments must be laminated in a suitable manner or made from ferrite material.A combination with embedded, radial, soft-magnetic sheet metal strips is possible, but also only appropriately shaped sheet metal strips that are welded to the inner and outer ends and if possible be stabilized by a casting compound.

Die Bauteile in unmittelbarer Umgebung der Magnete und Segmente müssen sich magnetisch neutral verhalten, der Abstand zwischen den Segmenten sowie deren Anzahl und die sonstigen Dimensionierungen haben Einfluß auf den Verlauf der Verstärkung unter verschiedenen Lastbedingungen.The components in the immediate vicinity of the magnets and segments must be behave magnetically neutral, the distance between the segments and their The number and the other dimensions influence the course of the Reinforcement under various load conditions.

Claims

1. Torque amplifier, characterized by two axially rotatably mounted shafts ( 4 , 6 ), by at least one eccentrically arranged on a first of the shafts magnet ( 2 ), the poles of which are offset from one another in the axial direction of the shafts, and one each of a ferromagnetic Material existing Polschuhrring ( 1 ) are adjacent, which is intended to surround the second shaft ( 6 ) of the axis, and by at least one second magnet ( 5 ) on the second shaft ( 6 ), the poles of which in turn in the axial direction of the shafts ( 4 , 6 ) are offset and a respective one of Polschuhringe (1) are adjacent to and cooperate the magnetic field across the Polschuhringe (1) with the magnetic field of the first magnet (2), said each Polschuhring (1) each have the same poles of the first magnet (2) and of the second magnet ( 5 ) are adjacent.

2. Torque amplifier according to claim 1, characterized in that the pole shoe rings ( 1 ) are each held on or in the housing.

3. Torque amplifier according to claim 1 or 2, characterized in that the pole shoe rings are each formed from a plurality of spaced segments ( 1 ) made of ferromagnetic material.

4. Torque amplifier according to claim 1 or 2, characterized in that the Pole shoe rings of at least partially structured rings, for example of at least partially segmented structured rings, made of ferromagnetic Material are formed.

5. Torque amplifier according to one of the preceding claims, characterized in that the pole shoe rings ( 1 ) form an open gap between them towards the common axis of the shafts, in which the first and second magnets ( 2 , 5 ) move.

6. Torque amplifier according to one of the preceding claims, characterized in that the first magnet ( 2 ) is a ring magnet with magnetic collecting rings ( 7 ) for utilizing the total magnetic flux or an equivalent of this arrangement.

7. Torque amplifier according to one of the preceding claims, characterized in that the second magnet ( 5 ) is a ring segment magnet which preferably has a cross-section which increases moderately in the direction of rotation.

8. Torque amplifier according to one of the preceding claims, characterized in that the first magnet is arranged on an eccentric ( 3 ) of the first shaft ( 4 ).

9. Torque amplifier according to one of the preceding claims, characterized in that a counterweight ( 8 , 9 ) is provided on the first shaft and the second shaft.