EP2759508B1 - Load-lifting magnet with rotary drive - Google Patents
Load-lifting magnet with rotary drive Download PDFInfo
- Publication number
- EP2759508B1 EP2759508B1 EP13152564.4A EP13152564A EP2759508B1 EP 2759508 B1 EP2759508 B1 EP 2759508B1 EP 13152564 A EP13152564 A EP 13152564A EP 2759508 B1 EP2759508 B1 EP 2759508B1
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- EP
- European Patent Office
- Prior art keywords
- load
- lifting magnet
- rotary drive
- lifting
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means
Definitions
- the present invention relates to a lifting magnet with a rotary drive according to the preamble of claim 1 and the use of such a lifting of suitable load.
- Lifting magnets are for example from the GB 1,213,962 known.
- This document discloses a lifting magnet with a stator and underlying rotor, each having a permanent magnet.
- the permanent magnets form parts of a magnetic circle.
- the GB 1,213,962 teaches that the rotor can be rotated manually by means of a handle by 180 ° between an off rest position and a working position switched on. The disadvantage here is that sometimes considerable force is necessary to move the lever. In the working position, a workload can be recorded. An applied load in this case influences the magnetic circuit in such a way that a force for transferring the handle becomes smaller.
- a lifting magnet of the type mentioned is known from EP 2 532 615 A1 known.
- the present invention is therefore based on the object to provide a lifting magnet or lifting magnet of the type mentioned, which is safely switchable without contact to the workload.
- a lifting magnet for frictionally receiving magnetic load comprises: at least one stator with a first permanent magnetic element, at least one rotor associated with the stator with a second permanent magnetic element and at least one contact element for receiving the load, wherein the at least one rotor by means of a rotary drive relative to the stator from a receiving position in which is provided by the first and second permanent magnetic element, a magnetic force for receiving the load on the contact element, in a release position in which the magnetic force the load releasably reduced, is rotatable, characterized in that the first permanent magnetic element of the stator in the main direction of the magnetic force on the load to the second permanent magnetic element of the rotor connects and between the second permanent magnetic element of the rotor and the contact element is located.
- the first and second permanent magnetic elements are preferably substantially identical elements, which are installed so that they give by rotation relative to each other a changed resulting magnetic field on the contact element. It is preferred that the rotary drive is a hydraulic rotary drive. Thus, this requires no electrical leads and is easy to use.
- the lifting magnet is operated without power and without a lifting cylinder. It is further preferred that a first axis of the rotary drive in the axial direction to a second axis of the rotor connects and the rotary drive is preferably mounted directly on the second axis. This makes a compact and stable construction possible. It is further preferred that the rotary drive is offset from the horizontal center of the stator in the longitudinal direction of the lifting magnet on the rotor, so that in the longitudinal direction of the stator in the direction of the rotary drive, in the region below the rotary drive to the plane of the contact element, a free space over preferably an entire depth or width of the lifting magnet consists. Thus, the rotary actuator is better protected against impacts from below.
- the rotor, the stator and preferably also the contact element are substantially the same length in the longitudinal direction of the lifting magnet. So the space in the lifting magnet is optimally used.
- the rotary drive is surrounded by a protective cover, which protects the rotary drive against impacts from below, wherein the protective cover in the longitudinal direction of the lifting magnet is preferably formed obliquely upward tapering in the longitudinal direction, without filling the free space.
- the protective cover is substantially U-shaped and surrounds the rotary drive from below. Further, it is advantageous if this protective cover with profile legs, the rotary drive also extends beyond the top and in the longitudinal direction of the lifting magnet to provide improved protection.
- stator is rotatable 180 degrees relative to the rotor.
- extremes of the magnetic loop i. minimum and maximum magnetic field
- the full power spectrum of the active circuit can be used. Due to the use of a rotary drive this is possible because there are no dead points in the mechanics.
- the lifting magnet has a housing around the magnet unit formed of rotor and stator.
- this housing is U-shaped and surrounds the magnet unit from above.
- the housing is not ferromagnetic, behaves magnetically passive, and mechanically protects the magnet unit and allows to mount on top a flange or suspension for mounting the lifting magnet.
- the cover is a molded, stable sheet.
- the housing in the region facing away from the contact element has a preferably trough-shaped reinforcing element over the rotor, which extends over the depth or width and the length of the housing and is fastened thereto in order to increase the mechanical stability.
- This tub is preferably reinforced by arranged in the tub ribs and bolted to the upwardly facing surface of the stator and against the profile legs of the housing cover.
- the lifting magnets are connected via at least one beam or sheet-like support member to a lifting magnet unit, wherein it is preferred that the lifting magnets are in particular mounted horizontally rotatable on the support member. It is particularly preferred that two lifting magnets are fastened to a support element, for example a steel frame, by means of a suspension device, wherein the suspension device is set up to rotate the lifting magnets about a vertical direction as a rotation axis.
- the present invention also relates to a use of the lifting magnet as described above or a lifting magnet unit as described above for receiving magnetic load and, after any movement of the lifting magnet together with the load, for subsequent release of the load.
- this lifting magnet or this lifting magnet unit can be used for vacuum cleaner-like collection of scattered on the ground magnetic small parts.
- the contact surface of the switched-magnet is guided in a small height of about 5 to 25 centimeters above the ground, such that the magnetic small parts of the effect of the magnetic circuit are exposed and pulled to the contact surface and reach the plant.
- the optimal distance to the ground depends on the strength of the magnetic circle and the weight of the small parts. If an intended number of small parts adhere to the contact surface, the user guides the magnet to a predetermined location and switches off the magnet, whereupon the small parts are released and fall to the ground due to gravity.
- Figures 1 and 2 show, in a perspective view from above or below, a preferred embodiment of the inventive lifting magnet 1.
- the lifting magnet 1 shown is suitable for use on construction sites, for example.
- the lifting magnet 1 is substantially cuboid and dimensioned so that payloads of about 50 to 1500 kilograms or more, depending on the embodiment, can be moved.
- a typical longitudinal extent of the lifting magnet 1 is about 25 to 100 centimeters, depending on lifting capacity and design.
- Preferred embodiments are a lifting magnet 1 with a longitudinal extent of about 50 centimeters and a lifting capacity of up to 1000 kilograms and a lifting magnet 1 with a longitudinal extent of about 100 centimeters and a lifting capacity of up to 2000 kilograms (safety factor 3).
- the lifting magnet 1 has a housing 3 with a housing cover 30, GeHousestimrentn 34b and two contact elements 35.
- the housing 3 is preferably made of non-magnetic material, in particular metal or plastic and surrounds a magnetic rotor 20 and a magnetic stator 10 (s. Fig. 6 ).
- the housing cover 30 is of U-shaped cross-sectional shape and overlaps with lateral profile legs rotor 20 and stator 10 from above.
- the flat planes Profile legs extend substantially to the lower end of the stator 10, where the abutment elements 35 are mounted.
- the housing cover 30 has rounded top edges 32, between which a flat top surface 33 extends, the latter connecting the two profile legs.
- the housing 3 is preferably detachably fastened via screw connections 31 on the lifting magnet 1, in particular on the stator 10.
- the top surface 33 has threaded holes 33a, which serve to attach a suspension 5 of the lifting magnet 1 (s. Fig. 8 ).
- At front end surfaces of the stator 10 frame 34 are screwed with central recess 34a.
- the housing cover 30 surrounds these frames 34, wherein the frame 34 and the housing cover 30 are preferably welded firmly.
- a rotary drive 40 is connected to the end face of the housing wall 34b.
- the rotary drive 40 is hydraulic, so needs no electrical leads and is surrounded by a protective cover 4.
- the protective cover 4 is U-shaped with a bottom element 43 and two projecting profile legs 44, 45 and surrounds the rotary drive 40 from below.
- the protective cover 4 adjoins the housing limiting wall 34b and extends longitudinally beyond the rotary drive 40.
- the profile legs 44, 45 extend with their free end portion to above the rotary drive 40 upwards.
- the protective cover 4 thus surrounds or overlaps the rotary drive 40 in a protective manner against impacts from all directions, in particular from below and the side (left, right in FIG Fig. 1 ).
- a strut 46 is mounted, which the two upper corners of the freestanding end portions of the profile legs 44, 45th combines. This strut 46 provides further protection for the rotary drive 40 and stabilizes the protective cover 4 mechanically.
- the strut 46 is rounded in the longitudinal direction and upwards.
- the protective cover is completely closed at the front and / or at the top.
- the protective cover 4 surrounds the rotary drive 40 completely or completely. These designs protect the rotary drive 40 better, but are heavier.
- the embodiment with open end according to Figs. 1, 2 has on a rotational axis 42 of the rotary drive 40 a rotatably mounted display element 47 in the form of a pointer.
- This pointer 47 is visible from the outside by a user of the device 1 through the open end of the protective cover 4 and indicates the instantaneous relative arrangement between the stator 10 and rotor 20 at.
- the pointer 47 thus serves as a rotational position indicator of the rotor 20.
- the rotational position indicator may also include a scale over which the pointer 47 wipes or to which the pointer 47 indicates, which facilitates the reading of the current rotational position.
- the abutment elements 35 which are spaced transversely to the longitudinal direction, are structured with a plurality of lattice-like intersecting grooves.
- This profiling increases the investment stability of the payload on the contact element 35.
- Such profiling is optional and particularly advantageous if the payload is dusty or has pebble-like contaminants on the outside. Thanks to this profiling, said impurities can be displaced in grooves of the profiling. The unwanted air gap between payload and contact element 35 due to the contamination is thereby reduced and the magnetic payload can come closer to the active circuit, whereby the performance of the lifting magnet 1 is better utilized.
- smooth abutment elements 35 are provided.
- the abutment member 35 may be made of hard material such as steel, preferably ferromagnetic material.
- the contact element can be coated with a damping layer, for example of rubber. It is conceivable to attach profiled rubber profiles to the contact surface.
- the damping layer has an advantageous effect on the stability of the system and reduces the noise emission during load absorption. How out Fig. 6 it can be seen, the contact elements 35 are bolted to the stator 10.
- a cover 35b closes the gap between the two Plant elements 35 such that a longitudinal recess 35c in the downwardly directed contact surface, which is spanned by the contact elements 35, is formed. This stabilizes the installation of the payload and allows it to come closer to the magnet unit 10, 20 in the middle region, whereby an acting force due to the magnetic circuit is increased.
- FIGS. 3 and 4 show the lifting magnet 1 according Figs. 1, 2 , where in Fig. 3
- the housing cover 30 and in Fig. 4 further also the rotary drive 40 are omitted.
- Fig. 3 the lateral outer surface of the stator 10 is visible.
- the stator 10 extends upwardly from the abutment element 35 substantially over the entire width or depth of the lifting magnet 1 parallel to the profile legs of the housing cover 30 and tapers in the region in which the rotor 20 is arranged (see also FIG Fig. 6 ).
- threaded holes 13 are provided for the screw 31 for fixing the cover 30.
- the cover 30 fits snugly in sections against the stator 10.
- a trough 36 is mounted, which is preferably fastened to the stator 10, in particular festschraubbar and extends over the entire length of the stator 10 and the width of the lifting magnet 1.
- mounting holes 38 are provided for screw with nuts.
- transversely extending ribs 37 are provided in the longitudinal direction at regular intervals between the mounting holes 38, which fill the cross-sectional shape of the trough 36, thus segmenting the trough 36 and thus mechanically stiffening and stabilizing the entire lifting magnet 1. How out Fig. 6 can be seen, the trough 36 has similar curves as the housing cover 30.
- the trough 36 has recesses 36a in the bottom area, in which corresponding or corresponding nubs of the ribs 37 engage. These serve to position the ribs 37 in the tub 36 before the ribs 37 and the tub 36 are welded.
- FIG. 4 shows that the rotary drive 40 is pushed directly onto a shaft 22 of the stator 10. This direct coupling allows a simple and robust construction.
- FIG. 5 shows a longitudinal cross section in the middle by the lifting magnet 1. It is in the lower Area a first permanent magnetic element 11 which is fixedly arranged in the stator 10 (s. Fig. 6 ) recognizable. Vertically above it is a second permanent magnetic element 21 of the rotor 20.
- the two permanent magnetic elements 11, 21 are cuboidal, extend substantially over the entire length of the stator 10 and rotor 20 and are of the same construction.
- the rotor 20 is arranged in the upper region of the stator 10, where it is rotatably mounted.
- the rotor 20 extends in the stator 10 substantially over its entire length.
- Fig. 5 is also shown how the shaft 22 of the rotor 20 engages in the rotary drive 40, wherein an axis 42 of the rotary drive coincides with the axis of the shaft 22.
- FIG. 6 (BB cut, s. Fig. 5 ) it can be seen that the first permanent-magnetic element 11 is fixed in the center of the stator 10. And the second permanent magnetic element 21 is located directly above.
- the stator 10 essentially consists of two halves, which surround the rotor 20 on each side, said halves having recesses into which the rotor 20 engages.
- the stator 10 is designed such that it projects the rotor 20 still tapering above and forming a triangular cross-section and down the rotor 20 more than upwardly projecting two feet provides, the abutment elements 35 and the cover 35b.
- the stator 10 and the rotor 20 are made of magnetic, in particular ferromagnetic material and form with the magnets 11, 21, the magnetic circuit, which provides a magnetic force for receiving the load on the contact element depending on the relative position of the two magnets (recording position) or the magnetic force releasably reduces the load (release position).
- FIG. 7 shows a cross section through an end portion of the lifting magnet 1 (AA section, s. Fig. 5 )
- the rotary drive 40 is arranged at a distance from the contact element 35. This clearance of the rotary drive 40 upwards creates a free space 15 below the rotary drive 40. This free space 15 extends below the protective cover 4 from the housing wall 34b to the outside and the width or depth of the lifting magnet 1. As in particular from Fig. 5 can be seen, the protective cover extends away from the housing end wall 34b obliquely upward. This Free space is therefore about 5 to 25 centimeters high and as wide or deep as the lifting magnet 1. The displacement of the rotary drive 40 upwards, ie away from the ground, when the lifting magnet 1 is in operation, protects the rotary actuator 40 in addition to punches.
- FIG. 8 shows a lifting magnet unit 2 with two lifting magnets 1, which are connected via a support member 4.
- the lifting magnets 1 are individually connected via plates 51 which are screwed onto the top surfaces 33 of the housing 3 of the lifting magnet 1, and an articulated suspension 5 to the support member 4.
- the suspensions 5 are guided through a slot 4 a through the support element 4 and above positively locked.
- a distance in the longitudinal direction of the support member 4 between the lifting magnet 1 is selectable and adjustable.
- the support element 4 can be coupled with a cable or excavator arm or the like.
- a payload magnetic 6, a double T-bar is shown.
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- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Description
Die vorliegende Erfindung betrifft einen Hebemagneten mit einem Drehantrieb gemäss Oberbegriff des Anspruchs 1 und die Verwendung eines solchen zum Heben von geeigneter Last.The present invention relates to a lifting magnet with a rotary drive according to the preamble of
Lasthebemagnete sind beispielsweise aus der
Ein Lasthebemagnet der Eingangs gennanten Art ist aus der
Der vorliegenden Erfindung liegt also die Aufgabe zu Grunde, einen Lasthebemagneten bzw. Hebemagneten eingangs genannter Art anzugeben, welcher ohne Kontakt zur Arbeitslast sicher schaltbar ist.The present invention is therefore based on the object to provide a lifting magnet or lifting magnet of the type mentioned, which is safely switchable without contact to the workload.
Diese und weitere Aufgaben werden durch einen Hebemagneten nach Anspruch 1 gelöst, wobei der Hebemagnet zur kraftschlĂ¼ssigen Aufnahme von magnetischer Last umfasst: mindestens einen Stator mit einem ersten permanentmagnetischen Element, mindestens einen dem Stator zugeordneten Rotor mit einem zweiten permanentmagnetischen Element und mindestens ein Anlageelement zur Aufnahme der Last, wobei der mindestens eine Rotor mittels eines Drehantriebs relativ zum Stator aus einer Aufnahmeposition, in welcher durch das erste und zweite permanentmagnetische Element eine magnetische Kraft zur Aufnahme der Last am Anlageelement zur VerfĂ¼gung gestellt ist, in eine Freigabeposition, in welcher die magnetische Kraft die Last freigebend reduziert ist, rotierbar ist, dadurch gekennzeichnet, dass das erste permanentmagnetische Element des Stators in Hauptwirkrichtung der magnetischen Kraft auf die Last an das zweite permanentmagnetischen Element des Rotor anschliesst und zwischen dem zweiten permanentmagnetischen Element des Rotors und dem Anlageelement liegt.These and other objects are achieved by a lifting magnet according to
Das erste und das zweite permanentmagnetische Element sind vorzugsweise im Wesentlichen baugleiche Elemente, welche so eingebaut sind, dass sie durch Verdrehen relativ zueinander ein verändertes resultierendes Magnetfeld am Anlageelement ergeben. Es ist bevorzugt, dass der Drehantrieb ein hydraulischer Drehantrieb ist. Somit benötigt dieser keine elektrischen Zuleitungen und ist einfach in der Anwendung.The first and second permanent magnetic elements are preferably substantially identical elements, which are installed so that they give by rotation relative to each other a changed resulting magnetic field on the contact element. It is preferred that the rotary drive is a hydraulic rotary drive. Thus, this requires no electrical leads and is easy to use.
Es ist also bevorzugt, dass der Hebemagnet stromfrei und ohne Hubzylinder betreibbar ist. Es ist weiter bevorzugt, dass eine erste Achse des Drehantriebs in axialer Richtung an eine zweite Achse des Rotors anschliesst und der Drehantrieb vorzugsweise direkt auf die zweite Achse montiert ist. Dadurch ist eine kompakte und stabile Bauweise möglich. Es ist weiterhin bevorzugt, dass der Drehantrieb versetzt zur horizontalen Mitte des Stators in Längsrichtung des Hebemagneten am Rotor anschliesst, sodass in Längsrichtung vom Stator in Richtung des Drehantriebs, im Bereich unterhalb des Drehantriebs zur Ebene des Anlageelements hin, ein Freiraum Ă¼ber vorzugsweise eine gesamte Tiefe bzw. Breite des Hebemagneten besteht. Damit ist der Drehantrieb besser vor Schlägen von unten geschĂ¼tzt. Vorzugsweise sind der Rotor, der Stator und vorzugsweise auch das Anlageelement im Wesentlichen gleich lang in Längsrichtung des Hebemagneten. So ist der Raum im Hebemagneten optimal genutzt.It is therefore preferred that the lifting magnet is operated without power and without a lifting cylinder. It is further preferred that a first axis of the rotary drive in the axial direction to a second axis of the rotor connects and the rotary drive is preferably mounted directly on the second axis. This makes a compact and stable construction possible. It is further preferred that the rotary drive is offset from the horizontal center of the stator in the longitudinal direction of the lifting magnet on the rotor, so that in the longitudinal direction of the stator in the direction of the rotary drive, in the region below the rotary drive to the plane of the contact element, a free space over preferably an entire depth or width of the lifting magnet consists. Thus, the rotary actuator is better protected against impacts from below. Preferably, the rotor, the stator and preferably also the contact element are substantially the same length in the longitudinal direction of the lifting magnet. So the space in the lifting magnet is optimally used.
In einer Weiterbildung ist der Drehantrieb mit einer Schutzabdeckung umgeben, welche den Drehantrieb gegen Schläge von unten schĂ¼tzt, wobei die Schutzabdeckung in Längsrichtung des Hebemagneten vorzugsweise in Längsrichtung schräg nach oben zulaufend geformt ist, ohne den Freiraum auszufĂ¼llen. Vorteilhafterweise ist die Schutzabdeckung im Wesentlichen U-förmig und umgreift den Drehantrieb von unten. Weiter ist es vorteilhaft, wenn diese Schutzabdeckung mit Profilschenkeln den Drehantrieb auch nach oben und in Längsrichtung des Hebemagneten Ă¼berragt, um verbesserten Schutz zu bieten.In a further development, the rotary drive is surrounded by a protective cover, which protects the rotary drive against impacts from below, wherein the protective cover in the longitudinal direction of the lifting magnet is preferably formed obliquely upward tapering in the longitudinal direction, without filling the free space. Advantageously, the protective cover is substantially U-shaped and surrounds the rotary drive from below. Further, it is advantageous if this protective cover with profile legs, the rotary drive also extends beyond the top and in the longitudinal direction of the lifting magnet to provide improved protection.
Es ist bevorzugt, dass der Stator relativ zum Rotor um 180 Grad rotierbar ist. Damit sind die Extrema des magnetischen Wirkkreises, d.h. minimales und maximales Magnetfeld, einsetzbar und das volle Leistungsspektrum des Wirkkreises ist einsetzbar. Aufgrund der Verwendung eines Drehantriebes ist dies möglich, da keine Totpunkte in der Mechanik existieren.It is preferred that the stator is rotatable 180 degrees relative to the rotor. Thus, the extremes of the magnetic loop, i. minimum and maximum magnetic field, can be used and the full power spectrum of the active circuit can be used. Due to the use of a rotary drive this is possible because there are no dead points in the mechanics.
Es ist bevorzugt, dass der Hebemagnet ein Gehäuse um die Magneteinheit gebildet aus Rotor und Stator aufweist. Vorzugsweise ist dieses Gehäuse U-förmig und umgreift die Magneteinheit von oben. Vorzugsweise ist das Gehäuse nicht ferromagnetisch, verhält sich magnetisch passiv, und schĂ¼tzt die Magneteinheit mechanisch und erlaubt, auf der Oberseite einen Flansch oder eine Aufhängung zur Montage des Hebemagneten anzubringen. Vorzugsweise ist die Abdeckung ein geformtes, stabiles Blech.It is preferred that the lifting magnet has a housing around the magnet unit formed of rotor and stator. Preferably, this housing is U-shaped and surrounds the magnet unit from above. Preferably, the housing is not ferromagnetic, behaves magnetically passive, and mechanically protects the magnet unit and allows to mount on top a flange or suspension for mounting the lifting magnet. Preferably, the cover is a molded, stable sheet.
Es ist weiter bevorzugt, dass das Gehäuse im dem Anlageelement abgewandten Bereich Ă¼ber dem Rotor ein vorzugsweise wannenförmiges Verstärkungselement aufweist, welches sich Ă¼ber die Tiefe bzw. Breite und die Länge des Gehäuses erstreckt und an diesem befestigt ist, um die mechanische Stabilität zu erhöhen. Diese Wanne ist vorzugsweise mittels in der Wanne angeordneter Rippen verstärkt und auf die nach oben weisende Fläche des Stators und gegen die Profilschenkel der Gehäuseabdeckung verschraubt.It is further preferred that the housing in the region facing away from the contact element has a preferably trough-shaped reinforcing element over the rotor, which extends over the depth or width and the length of the housing and is fastened thereto in order to increase the mechanical stability. This tub is preferably reinforced by arranged in the tub ribs and bolted to the upwardly facing surface of the stator and against the profile legs of the housing cover.
In einer Weiterbildung sind die Hebemagneten Ă¼ber mindestens ein balken- oder flächenartiges Tragelement zu einer Hebemagneteinheit verbunden, wobei bevorzugt ist, dass die Hebemagneten insbesondere horizontal rotierbar am Trageelement befestigt sind. Besonders bevorzugt ist, dass zwei mittels einer Aufhängevorrichtung an einem Trageelement, bspw. einem Stahlrahmen befestigte Hebemagneten umfasst sind, wobei die Aufhängevorrichtung eingerichtet ist, die Hebemagneten um eine Lotrichtung als Drehachse zu rotieren.In a further development, the lifting magnets are connected via at least one beam or sheet-like support member to a lifting magnet unit, wherein it is preferred that the lifting magnets are in particular mounted horizontally rotatable on the support member. It is particularly preferred that two lifting magnets are fastened to a support element, for example a steel frame, by means of a suspension device, wherein the suspension device is set up to rotate the lifting magnets about a vertical direction as a rotation axis.
Die vorliegende Erfindung betrifft auch eine Verwendung des Hebemagneten wie oben beschrieben oder einer Hebemagneteinheit wie oben beschrieben zur Aufnahme von magnetischer Last und, nach einer allfälligen Bewegung des Hebemagneten mitsamt der Last, zur anschliessenden Freigabe der Last.The present invention also relates to a use of the lifting magnet as described above or a lifting magnet unit as described above for receiving magnetic load and, after any movement of the lifting magnet together with the load, for subsequent release of the load.
Besonders vorteilhaft kann dieser Hebemagnet oder diese Hebemagneteinheit zur staubsaugerartigen Sammlung von auf dem Boden zerstreut liegenden magnetischen Kleinteilen eingesetzt werden. Hierzu wird die Anlagefläche des eingeschalteten Magneten in einer geringen Höhe von etwa 5 bis 25 Zentimeter Ă¼ber den Boden gefĂ¼hrt, derart, dass die magnetischen Kleinteile der Wirkung des magnetischen Wirkkreises ausgesetzt sind und zur Anlagefläche gezogen und dort zur Anlage gelangen. Die optimale Distanz zum Boden hängt von der Stärke des magnetischen Wirkkreises und dem Gewicht der Kleinteile ab. Haftet eine beabsichtigte Anzahl von Kleinteilen an der Anlagefläche, so fĂ¼hrt der Benutzer den Magneten zu einem vorbestimmten Ort und schaltet den Magneten aus, worauf die Kleinteile freigegeben und auf Grund der Gravitation zu Boden fallen.Particularly advantageous this lifting magnet or this lifting magnet unit can be used for vacuum cleaner-like collection of scattered on the ground magnetic small parts. For this purpose, the contact surface of the switched-magnet is guided in a small height of about 5 to 25 centimeters above the ground, such that the magnetic small parts of the effect of the magnetic circuit are exposed and pulled to the contact surface and reach the plant. The optimal distance to the ground depends on the strength of the magnetic circle and the weight of the small parts. If an intended number of small parts adhere to the contact surface, the user guides the magnet to a predetermined location and switches off the magnet, whereupon the small parts are released and fall to the ground due to gravity.
Weitere AusfĂ¼hrungsformen sind in den abhängigen AnsprĂ¼chen angegeben.Further embodiments are given in the dependent claims.
Bevorzugte AusfĂ¼hrungsformen der Erfindung werden im Folgenden anhand der Zeichnungen beschrieben, die lediglich zur Erläuterung dienen und nicht einschränkend auszulegen sind. In den Zeichnungen zeigen:
- Fig. 1
- eine perspektivische Ansicht von oben auf eine bevorzugte AusfĂ¼hrungsform des erfindungsgemässen Hebemagneten;
- Fig. 2
- den Hebemagneten nach
Fig. 1 mit Gehäuse in einer perspektivischen Ansicht von unten; - Fig. 3
- den Hebemagneten nach
Fig. 1 in einer weiteren perspektiven Ansicht ohne Gehäuse mit sichtbarem Drehantrieb; - Fig. 4
- den Hebemagneten nach
Fig. 1 ohne Gehäuse und ohne Drehantrieb; - Fig. 5
- einen Längsschnitt durch den Hebemagneten nach
Fig. 1 ; - Fig. 6
- einen Querschnitt durch einen mittleren Abschnitt B-B des Hebemagneten nach
Fig. 1 ; - Fig. 7
- einen Querschnitt durch einen vorderen Abschnitt A-A des Hebemagneten nach
Fig. 1 ; und - Fig. 8
- eine Traverse mit zwei Hebemagneten nach
Fig. 1 , welche eine Hebemagneteinheit bilden.
- Fig. 1
- a perspective view from above of a preferred Embodiment of the lifting magnet according to the invention;
- Fig. 2
- the lifting magnet after
Fig. 1 with housing in a perspective view from below; - Fig. 3
- the lifting magnet after
Fig. 1 in another perspective view without housing with visible rotary drive; - Fig. 4
- the lifting magnet after
Fig. 1 without housing and without rotary drive; - Fig. 5
- a longitudinal section through the lifting magnet according to
Fig. 1 ; - Fig. 6
- a cross section through a central portion BB of the lifting magnet according to
Fig. 1 ; - Fig. 7
- a cross section through a front portion AA of the lifting magnet according to
Fig. 1 ; and - Fig. 8
- a traverse with two lifting magnets behind
Fig. 1 which form a lifting magnet unit.
An das kastenförmige Gehäuse 3 schliesst sich stirnseitig an die Gehäusestimwand 34b ein Drehantrieb 40 an. Der Drehantrieb 40 ist hydraulisch, braucht also keine elektrischen Zuleitungen und ist von einer Schutzabdeckung 4 umgeben. Die Schutzabdeckung 4 ist U-förmig mit einem Bodenelement 43 und zwei davon abstehenden Profilschenkeln 44, 45 und umgreift den Drehantrieb 40 von unten. Die Schutzabdeckung 4 schliesst sich an die Gehäusestimwand 34b an und erstreckt sich in Längsrichtung bis Ă¼ber den Drehantrieb 40 hinaus. Die Profilschenkel 44, 45 erstrecken sich mit ihren freien Endabschnitt bis Ă¼ber den Drehantrieb 40 nach oben. Damit umgibt bzw. Ă¼bergreift die Schutzabdeckung 4 den Drehantrieb 40 schĂ¼tzend vor Schlägen aus allen Richtungen, insbesondere von unten und der Seite (links, rechts in
An der stirnseitigen Ă–ffnung der Schutzabdeckung 4 ist eine Strebe 46 angebracht, welche die beiden oberen Ecken der freistehenden Endabschnitte der Profilschenkel 44, 45 verbindet. Diese Strebe 46 bietet weiteren Schutz fĂ¼r den Drehantrieb 40 und stabilisiert die Schutzabdeckung 4 mechanisch. Die Strebe 46 ist in Längsrichtung und nach oben abgerundet.At the frontal opening of the
In einer alternativen AusfĂ¼hrungsform ist die die Schutzabdeckung stirnseitig und/oder oben vollständig geschlossen. In einer Weiterbildung umgibt die Schutzabdeckung 4 den Drehantrieb 40 also vollständig bzw. vollflächig. Diese Ausbildungen schĂ¼tzen den Drehantrieb 40 besser, sind allerdings schwerer.In an alternative embodiment, the protective cover is completely closed at the front and / or at the top. In a development, the
Die AusfĂ¼hrungsform mit offener Stirnseite gemäss
Wie aus den
In einer anderen bevorzugten AusfĂ¼hrungsform sind glatte Anlageelemente 35 vorgesehen. Das Anlageelement 35 kann aus Hartmaterial wie Stahl, vorzugweise aus ferromagnetischem Material gefertigt sein.In another preferred embodiment,
Zudem kann das Anlageelement mit einer Dämpfschicht, bspw. aus Gummi, Ă¼berzogen sein. Es ist denkbar, profilierte Gummiprofile an der Anlagefläche anzubringen. Die Dämpfschicht wirkt vorteilhaft auf die Anlagestabilität und reduziert die Lärmemission bei der Lastaufnahme. Wie aus
In
Oben auf dem Stator 10 ist eine Wanne 36 angebracht, welche vorzugsweise auf dem Stator 10 befestigbar, insbesondere festschraubbar ist und sich Ă¼ber die gesamte Länge des Stators 10 und die Breite des Hebemagneten 1 erstreckt. An den seitlich nach oben stehenden Wänden der Wanne 36, welche im Wesentlichen senkrecht und parallel zu den Profilschenkeln der Abdeckung 30 verlaufen, sind Befestigungslöcher 38 fĂ¼r Schraubverbindungen mit Muttern vorgesehen. In der Wanne 36 sind in Längsrichtung in regelmässigen Abständen zwischen den Befestigungslöcher 38 quer verlaufende Rippen 37 angebracht, welche die Querschnittsform der Wanne 36 ausfĂ¼llen, die Wanne 36 somit segmentieren und damit den gesamten Hebemagneten 1 mechanisch versteifen und stabilisieren. Wie aus
In
In
Auf Grund der Anordnung des zweiten permanentmagnetischen Elements 21 Ă¼ber dem ersten permanentmagnetischen Element 11 ist der Drehantrieb 40 in Abstand zu Anlageelement 35 angeordnet. Durch dieses Versetzen des Drehantriebs 40 nach oben entsteht ein Freiraum 15 unterhalb des Drehantriebs 40. Dieser Freiraum 15 erstreckt sich unterhalb der Schutzabdeckung 4 von der Gehäusestimwand 34b nach aussen und Ă¼ber die Breit oder Tiefe des Hebemagneten 1. Wie insbesondere aus
Claims (14)
- Load-lifting magnet (1) for the force-fitted uptake of a magnetic load comprising: at least one stator (10) having a first permanently magnetic element (11), at least one stator (10) associated to the rotor (20) having a second permanently magnetic element (21) and at least one docking element (35) for taking up the load, whereby the at least one rotor (20) is rotatable by means of a rotary drive (40) relative to the stator (10) from an uptake position in which a magnetic force for the uptake of the load at the docking element (35) is provided by the first and second permanently magnetic element (21) into a release position, in which the magnetic force is load-releasingly reduced, characterized in that, the first permanently magnetic element (11) of the stators (10) connects to the second permanently magnetic element (21) of the rotor (20) in the main direction of the action of the magnetic force onto the load and lies between the second permanently magnetic element (21) of the rotor (20) and the docking element (35).
- Load-lifting magnet (1) according to claim 1, characterized in that, the rotary drive (40) is a hydraulic rotary drive (40).
- Load-lifting magnet (1) according to claim 1 or 2, characterized in that, the load-lifting magnet (1) can be operated without current and without lifting cylinders.
- Load-lifting magnet (1) according to one of the claims 1 to 3, characterized in that, a first axis (42) of the rotary drive (40) connects to a second axis (22) of the rotors (20) in axial direction and the rotary drive (40) is preferably directly mounted on the second axis (42).
- Load-lifting magnet (1) according to one of the claims 1 to 4, characterized in that, the rotary drive (40) connects to the rotor (20) shifted with respect to the stator (10) in longitudinal direction of the load-lifting magnet (1), such that in the longitudinal direction of the stator (10) in direction of the rotary drive (40), in the region below the rotary drive (40) towards the plane of the docking element (35), a clearance (15) exists across preferably an entire depth or breadth of the load-lifting magnet (1).
- Load-lifting magnet (1) according to one of the claims 1 to 5, characterized in that the rotor (20), the stator (10) and also preferably the docking element (35) are of the same length in longitudinal direction of the load-lifting magnet (1).
- Load-lifting magnet (1) according to one of the claims 1 to 6, characterized in that, the rotary drive (40) is surrounded by a protective covering (4), which protects the rotary drive (40) against impacts from below, whereby preferably the protective covering (4) encloses the rotary drive (40) from below and is formed into a tapered shape towards the top in longitudinal direction of the load-lifting magnet (1).
- Load-lifting magnet (1) according to one of the claims 1 to 7, characterized in that, the stator (10) is rotatable by 180 degrees relative to the rotor (20).
- Load-lifting magnet (1) according to one of the claims 1 to 8, characterized in that, the load-lifting magnet (1) exhibits a casing (30) constituted by the rotor (20) and stator (10) around the magnet unit (10, 20).
- Load-lifting magnet (1) according to claim 9, characterized in that, the casing (30) exhibits a preferably tub-shaped reinforcing element (36) in the region above the rotor (20) on the far side of the docking element (35), whereby this tub (36) is preferably reinforced by means of ribs (37) arranged within the tub (36).
- Load-lifting magnet unit comprising a plurality of load-lifting magnets (1) according to one of the claims 1 to 10, characterized in that, the load-lifting magnets (1) are connected across at least one bar- or surface-like bearing element (4).
- Load-lifting magnet unit according to claim 11, characterized in that, the load-lifting magnets (1) are rotatably fixed to the at least one bearing element.
- Load-lifting magnet unit according to one of the claims 11 or 12, characterized in that, two load-lifting magnets (1) fixed to a bearing element by means of a suspension device are comprised, whereby the suspension device is configured to rotate the road-lifting magnets (1) around a vertical direction.
- Use of a load-lifting magnet (1) according to one of the claims 1 to 10 or a load-lifting magnet unit according to one of the claims 11 to 13 for the taking up of a magnetic load and, after an eventual movement of the load-lifting magnet (1) including the load, for the subsequent release of the load.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13152564.4A EP2759508B1 (en) | 2013-01-24 | 2013-01-24 | Load-lifting magnet with rotary drive |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13152564.4A EP2759508B1 (en) | 2013-01-24 | 2013-01-24 | Load-lifting magnet with rotary drive |
Publications (2)
Publication Number | Publication Date |
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EP2759508A1 EP2759508A1 (en) | 2014-07-30 |
EP2759508B1 true EP2759508B1 (en) | 2015-10-14 |
Family
ID=47681692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP13152564.4A Active EP2759508B1 (en) | 2013-01-24 | 2013-01-24 | Load-lifting magnet with rotary drive |
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EP (1) | EP2759508B1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1213962A (en) | 1969-03-06 | 1970-11-25 | Eriez Mfg Company | Turn-off permanent magnet |
KR20030086562A (en) * | 2003-10-24 | 2003-11-10 | ́˜ˆí•´ê¸ˆ | Apparatus for switching adsorptive magnetic power for magnetic adsorber |
US8977398B2 (en) * | 2011-04-29 | 2015-03-10 | Sarcos Lc | Multi-degree of freedom torso support for a robotic agile lift system |
EP2532615A1 (en) * | 2011-06-08 | 2012-12-12 | Starmag AG | Lifting magnet with cylinder/piston actuator |
-
2013
- 2013-01-24 EP EP13152564.4A patent/EP2759508B1/en active Active
Also Published As
Publication number | Publication date |
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EP2759508A1 (en) | 2014-07-30 |
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