EP4036371A1 - Pneumatic motor with rotary position measuring and method for measuring rotational speed - Google Patents

Pneumatic motor with rotary position measuring and method for measuring rotational speed Download PDF

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Publication number
EP4036371A1
EP4036371A1 EP22154722.7A EP22154722A EP4036371A1 EP 4036371 A1 EP4036371 A1 EP 4036371A1 EP 22154722 A EP22154722 A EP 22154722A EP 4036371 A1 EP4036371 A1 EP 4036371A1
Authority
EP
European Patent Office
Prior art keywords
rotor
sensor element
stator
sensor
compressed gas
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.)
Pending
Application number
EP22154722.7A
Other languages
German (de)
French (fr)
Inventor
Jörg Vogel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Tec Vogel GmbH
Original Assignee
Air Tec Vogel GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Air Tec Vogel GmbH filed Critical Air Tec Vogel GmbH
Publication of EP4036371A1 publication Critical patent/EP4036371A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F01C1/3441—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F01C1/3442—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
    • F01C20/08—Control of, monitoring of, or safety arrangements for, machines or engines characterised by varying the rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
    • F01C20/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/05—Speed
    • F04C2270/052—Speed angular

Definitions

  • the invention relates to a compressed gas-operated drive device comprising a compressed gas motor with a stator, a rotor which rotates relative thereto about an axis of rotation when pressurized with compressed air, which has laminar slots running in the longitudinal direction of the axis of rotation and a rotor shaft which defines the axis of rotation and which can be rotated on the stator via end shields is mounted, and a sensor device with a sensor element for determining a rotational state or a speed of the rotor relative to the stator, the sensor element for determining the rotational state or the speed of the rotor being aligned with a marking coupled to the rotor.
  • a compressed gas operated drive device of the type mentioned is from DE 20 2016 104 704 U1 known.
  • the compressed gas-operated drive device comprises a compressed gas motor with a stator and a rotor rotating relative thereto about an axis of rotation under the action of compressed gas, the rotor having a rotor shaft defining the axis of rotation, which is rotatably mounted on the stator via end shields.
  • the stator and the end shields define a working space in which the rotor rotates.
  • the drive device also includes a sensor device for determining a rotational state of the rotor relative to the stator.
  • the sensor device is designed to determine a rotational speed of the rotor relative to the stator, the sensor device having a sensor element which is directed towards a section of the shaft which is outside the working space and on which a marking is attached.
  • a receptacle in the form of a radial bore, in which the sensor element of the sensor device is arranged such that the marking on the section of the shaft outside the working space can be detected.
  • the marks are formed by two recesses in the section of the shaft.
  • the sensor element protrudes radially beyond a substantially cylindrical housing wall of the compressed air motor, so that the radially projecting sensor element enables space-saving installation of the compressed gas motor in z.
  • B. prevents a hollow cylindrical recording of a device, spindle or vice.
  • the DE 10 2013 020 985 A1 relates to an electrical machine, in particular for a motor vehicle.
  • the electrical machine comprises a housing with a rotor shaft which is at least partially arranged in the housing and which can be rotated about an axis of rotation relative to the housing.
  • a rotor part non-rotatably connected to the rotor shaft and a corresponding stator part fixed at least indirectly to the housing, which has a sensor device for detecting at least one measured variable characterizing a rotation of the rotor shaft relative to the housing.
  • the sensor device is designed as a speed and/or angle sensor and includes a stator part which is fixed at least indirectly to the housing.
  • the sensor device also includes a rotor part that corresponds to the stator part and is connected to the rotor shaft in a torque-proof manner.
  • the DE 10 2015 219 502 A1 relates to a drive device for providing a linear movement, having a drive housing in which an electric rotary drive is accommodated, which includes a stator in which a rotor is arranged such that it can rotate about an axis of rotation relative to the stator.
  • the rotor is penetrated by a recess which is provided with an internal thread, and with a piston rod which extends along the axis of rotation of the rotor and is movably accommodated in the rotor with a threaded section adapted to the internal thread.
  • a sensor device for determining a position of the coupling rod relative to the drive housing is assigned to the coupling rod and/or the rotor.
  • the sensor device is designed either as a switching device or as a proportional sensor.
  • the DE 10 2016 226 293 A1 relates to a brushless electric machine.
  • the machine comprises a housing with at least one rotor, which is arranged on a shaft rotatably mounted in the housing, and with a stator, with a contact-free rotor position detection device being assigned to the rotor.
  • the rotor position detection device has a multi-pole magnet ring arranged in a rotationally fixed manner on the shaft and at least one magnetic field-sensitive sensor assigned radially to the outer circumference of the magnet ring.
  • the DE 10 2019 122 046 A1 relates to a device for measuring the angular position of a shaft.
  • the device comprises a first housing part and a shaft which is arranged in the first housing part and can be rotated about an axis of rotation.
  • the device further comprises a magnet unit with at least one permanent magnet fixed to the shaft, a second housing part with a projection extending along the axis of rotation, and a magnetic field sensor element arranged inside the projection of the second housing part.
  • the present invention is based on the object of further developing a compressed gas-operated drive device of the type mentioned at the outset in such a way that simple and space-saving assembly of the compressed gas engine is made possible.
  • the markings are the slat slots.
  • the marking is thus detected in the working area, so that a compact design is made possible.
  • the lamella slots already present in the rotor are used, so that no new markings have to be created.
  • the embodiment according to the invention is characterized in that the lamella slots extend into an end face of the rotor, the end face facing one of the end shields and the sensor element being arranged in one of the end shields and aligned with the lamella slots.
  • the advantage is achieved that the sensor element does not protrude radially beyond a cylindrical surface of the housing of the drive device operated by compressed gas. This enables the compressed gas-operated drive device to be installed in a cylindrical receptacle.
  • the bearing plate there is a receptacle which runs in the axial direction parallel to the axis of rotation and in which the sensor element of the sensor device is arranged. This enables a particularly compact design.
  • the recording can be designed as an axial bore.
  • the bore can be designed as a threaded bore into which the sensor element is screwed.
  • the sensor element can be designed as a contactless sensor such as an inductive, capacitive, optical and/or magnetic sensor.
  • a particularly compact design is characterized by the fact that the sensor element is arranged in a rear bearing plate, i.e. one that faces away from the drive side.
  • the invention relates to a compressed gas-operated drive device, comprising a compressed gas motor with a stator, a rotor which rotates relative to this about an axis of rotation when subjected to compressed air and has a rotor shaft that defines the axis of rotation and is rotatably mounted on the stator via end shields, as well as a sensor device having a sensor element for determining a rotational state or a speed of the rotor relative to the stator, the sensor element for determining the rotational state or the speed of the rotor being aligned with a marking coupled to the rotor.
  • the marking on an end face of a radially from the rotor shaft outgoing body is formed, wherein the end face of the body faces one of the bearing plates and wherein the sensor element is arranged in one of the bearing plates and aligned with the marking.
  • the body is the rotor and that the end face with the marking is an end face of the rotor. This also enables a particularly compact and robust design.
  • the body can also be a disk or part of a disk which runs parallel to the end face of the rotor and is centrally penetrated by the rotor shaft.
  • the body can be arranged in a working space of the rotor or outside of the working space at an end of the rotor shaft that passes through the bearing plate.
  • FIG. 1 shows a sectional view of a compressed gas-operated drive device 10 with a compressed gas motor 12, which is arranged in a housing 14.
  • the housing 14 includes a sleeve 16 which is closed at the end with a housing cover 16, 18 in each case.
  • the compressed gas motor 12 comprises a stator 20 and a rotor 24 which rotates about an axis of rotation 22 relative thereto when compressed gas is applied, with a rotor shaft 26 which defines the axis of rotation 22 .
  • the rotor shaft 26 is rotatably mounted on the stator 20 via bearing elements 28, 30 in a front and a rear bearing plate 32, 34, respectively.
  • the stator 20 includes a cylinder 36 which is inserted into the sleeve 16 and encloses a drive space 38 .
  • the drive chamber 38 can be pressurized with compressed gas via a supply channel 40 , the supply channel 40 running through the housing cover 18 and the bearing plate 32 and opening into the drive chamber 38 .
  • the exhaust air is discharged via an exhaust air duct 42 .
  • a front section 44 of the rotor shaft 26 is coupled to a gear stage 46 .
  • the gear stage 46 includes a drive shaft 48 which is rotatably mounted in the housing 16 via bearing elements 50, 52 and is coupled to the section 44 of the rotor shaft 26 via a planetary gear 54.
  • the compressed gas-operated drive device 10 has a sensor device 56 in order to determine a rotational speed of the rotor 24 relative to the stator 20 .
  • the sensor device 54 has a sensor element 58 which is arranged and aligned in the rear end shield 32 in such a way as to scan a marking 61 formed on an end face 60 of the rotor 24 . It is provided that the sensor element 58 is accommodated in an axial bore 62 which runs parallel or substantially parallel to the axis of rotation 22 and is formed in the bearing plate 32 .
  • FIG. 2 shows the rotor 24 with rotor shaft 26 in a perspective view.
  • Lamella slots 64.1, 64.2, 64.3, 64.4, 64.5 are formed in the rotor 24 in the longitudinal direction, preferably evenly distributed in the circumferential direction, which extend at least into the rear end face 60 of the rotor 24 and form the marking 61.
  • the sensor element 58 is a non-contact sensor such. B. inductive sensor formed.
  • the sensor element 58 detects the lamella slots 64.1, 64.2, 64.3, 64.4, 64.5 that open into the end face 60 as the marking 61.
  • the sensor element 58 detects a change in material between the metallic end face 60 and the non-metallic lamellar slot, which generates a pulse that can be evaluated by an evaluation device in order to detect the speed or rotational movement of the rotor. Five pulses are thus generated during one revolution in the illustrated embodiment.
  • the sensor element 58 By arranging the sensor element 58 in the end shield 32 and parallel or substantially parallel to the axis of rotation 22, a particularly compact design is achieved. Compared to the prior art, the advantage is achieved that the sensor device 56 does not protrude beyond the cylindrical housing 16 in the radial direction.
  • the compressed air motor can be accommodated or integrated in a space-saving manner in a hollow-cylindrical receptacle, even without a housing 16 .
  • Figure 3a shows the compressed gas motor 12 according to the invention in the form of a self-inventive built-in motor without a housing 14, which saves space directly in a cylindrical receptacle z.
  • B. a device, spindle or a vice can be installed. This is where the particular advantage of the present invention becomes apparent, with the sensor device 56 being arranged in the axial bore 62 of the bearing plate 32 and thus making space-saving assembly possible even without a housing 14 in the first place.
  • the end shields 32, 34 are connected to the stator 20 at the end and form a compact unit that can also be installed without a housing 14.
  • Figure 3b shows an exploded view of the compressed gas engine 12.
  • the slat slots 64.1, 64.2, 64.3, 64.4, 64.5 are designed to accommodate corresponding slats 65.1, 65.2, 65.3, 65.4, 65.5.
  • the lamellae 65.1, 65.2, 65.3, 65.4, 65.5 are inserted into the lamellar slots 64.1, 64.2, 64.3, 64.4, 64.5 so that when the Rotor are movable in the radial direction and abut during operation of the engine against an inner surface of the cylinder 36, whereby flow channels for driving the rotor 24 are formed.
  • FIG. 4 shows a sectional view of an inventive gear stage 66 which is coupled to a rotor shaft 68 of a compressed air motor 70 .
  • the gear stage 66 includes a planetary gear 72 which is positively coupled to one end of the rotor shaft 68 .
  • a drive shaft 74 is driven via the planetary gear 72 .
  • the drive shaft 74 is rotatably mounted in a housing 76 of the gear stage 66 via a bearing element 76 .
  • the housing 76 is covered at the end with a housing cover 78 .
  • a receptacle 80 such as a bore, which extends in the radial direction and in which a sensor device 82 is accommodated.
  • the sensor device 82 includes a sensor element 84 which interacts with a sensor nut 86 arranged on the drive shaft 74 .
  • the sensor nut 84 has different magnetizations on its circumference, which are detected without contact by the sensor element 84 in order to measure the rotational speed or rotation of the drive shaft 74 .
  • the inventive arrangement of the sensor device 82 in the gear stage makes it possible for the housing of the flanged-on compressed air motor 70 to retain its cylindrical shape, which is advantageous for many applications in order to enable an optimal installation position for the compressed air motor 70.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

Die Erfindung bezieht sich auf eine druckgasbetriebene Antriebseinrichtung (10) mit Drehzustandsmessung sowie auf ein Verfahren zur Drehzustandsmessung. Die Antriebseinrichtung umfasst einen Druckgasmotor (14) mit einem Stator (20), einem relativ zu diesem unter Beaufschlagung mit Druckluft um eine Drehachse (22) drehenden Rotor (24), der in Längsrichtung der Drehachse (22) verlaufende Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) und eine die Drehachse (22) definierende Rotorwelle (26) aufweist, die über Lagerschilde (32, 34) am Stator (20) drehbar gelagert ist, sowie einer Sensoreinrichtung (56) mit einem Sensorelement (58) zum Ermitteln eines Drehzustands oder einer Drehzahl des Rotors (24) relativ zum Stator (20), wobei das Sensorelement (58) zur Ermittlung des Drehzustands oder der Drehzahl des Rotors (24) auf eine mit dem Rotor (24) gekoppelte Markierung (61) ausgerichtet ist. Um einen kompakten Aufbau der Antriebseinrichtung zu ermöglichen ist vorgesehen, dass die Markierung (61) die Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) sind.The invention relates to a compressed gas-operated drive device (10) with rotational state measurement and a method for rotational state measurement. The drive device comprises a compressed gas motor (14) with a stator (20), a rotor (24) which rotates relative thereto about an axis of rotation (22) when compressed air is applied, which has lamellar slots (64.1, 64.2) running in the longitudinal direction of the axis of rotation (22). 64.3, 64.4, 64.5) and a rotor shaft (26) defining the axis of rotation (22), which is rotatably mounted on the stator (20) via end shields (32, 34), and a sensor device (56) with a sensor element (58) for Determining a rotational state or speed of the rotor (24) relative to the stator (20), wherein the sensor element (58) is aligned with a marker (61) coupled to the rotor (24) to determine the rotational state or speed of the rotor (24). is. In order to enable a compact construction of the drive device, it is provided that the marking (61) is the slat slots (64.1, 64.2, 64.3, 64.4, 64.5).

Description

Die Erfindung bezieht sich auf eine druckgasbetriebene Antriebseinrichtung umfassend einen Druckgasmotor mit einem Stator, einem relativ zu diesem unter Beaufschlagung mit Druckluft um eine Drehachse drehenden Rotor, der in Längsrichtung der Drehachse verlaufende Lamellenschlitze und eine die Drehachse definierende Rotorwelle aufweist, die über Lagerschilde am Stator drehbar gelagert ist, sowie einer Sensoreinrichtung mit einem Sensorelement zum Ermitteln eines Drehzustands oder einer Drehzahl des Rotors relativ zum Stator, wobei das Sensorelement zur Ermittlung des Drehzustandes oder der Drehzahl des Rotors auf eine mit dem Rotor gekoppelte Markierung ausgerichtet ist.The invention relates to a compressed gas-operated drive device comprising a compressed gas motor with a stator, a rotor which rotates relative thereto about an axis of rotation when pressurized with compressed air, which has laminar slots running in the longitudinal direction of the axis of rotation and a rotor shaft which defines the axis of rotation and which can be rotated on the stator via end shields is mounted, and a sensor device with a sensor element for determining a rotational state or a speed of the rotor relative to the stator, the sensor element for determining the rotational state or the speed of the rotor being aligned with a marking coupled to the rotor.

Eine druckgasbetriebene Antriebseinrichtung der eingangs genannten Art ist aus der DE 20 2016 104 704 U1 bekannt. Die druckgasbetriebene Antriebseinrichtung umfasst einen Druckgasmotor mit einem Stator und einem relativ zu diesem unter Beaufschlagung mit Druckgas um eine Drehachse drehenden Rotor, wobei der Rotor eine die Drehachse definierende Rotorwelle aufweist, die über Lagerschilde am Stator drehbar gelagert ist. Der Stator und die Lagerschilde definieren einen Arbeitsraum, in dem der Rotor dreht. Die Antriebseinrichtung umfasst des Weiteren eine Sensoreinrichtung zum Ermitteln eines Drehzustandes des Rotors relativ zum Stator umfasst.A compressed gas operated drive device of the type mentioned is from DE 20 2016 104 704 U1 known. The compressed gas-operated drive device comprises a compressed gas motor with a stator and a rotor rotating relative thereto about an axis of rotation under the action of compressed gas, the rotor having a rotor shaft defining the axis of rotation, which is rotatably mounted on the stator via end shields. The stator and the end shields define a working space in which the rotor rotates. The drive device also includes a sensor device for determining a rotational state of the rotor relative to the stator.

Die Sensoreinrichtung ist ausgebildet, eine Drehzahl des Rotors relativ zum Stator zu ermitteln, wobei die Sensoreinrichtung ein Sensorelement aufweist, welches auf einen außerhalb des Arbeitsraums liegenden Abschnitt der Welle gerichtet ist, an dem eine Markierung angebracht ist.The sensor device is designed to determine a rotational speed of the rotor relative to the stator, the sensor device having a sensor element which is directed towards a section of the shaft which is outside the working space and on which a marking is attached.

Dabei ist vorgesehen, dass in einem Gehäuse des Druckgasmotors eine Aufnahme in Form einer Radialbohrung ausgebildet ist, in der das Sensorelement der Sensoreinrichtung so angeordnet ist, dass die Markierung auf dem außerhalb des Arbeitsraums liegenden Abschnitt der Welle erfasst werden kann. Die Markierungen werden durch zwei Ausnehmungen in dem Abschnitt der Welle gebildet.It is provided that in a housing of the compressed gas motor there is a receptacle in the form of a radial bore, in which the sensor element of the sensor device is arranged such that the marking on the section of the shaft outside the working space can be detected. The marks are formed by two recesses in the section of the shaft.

Nach dem Stand der Technik steht das Sensorelement radial über eine im Wesentlichen zylinderförmige Gehäusewandung des Druckluftmotors über, so dass das radial vorstehende Sensorelement einen platzsparenden Einbau des Druckgasmotors in z. B. eine hohlzylinderförmige Aufnahme einer Vorrichtung, Spindel oder Schraubstocks verhindert.According to the prior art, the sensor element protrudes radially beyond a substantially cylindrical housing wall of the compressed air motor, so that the radially projecting sensor element enables space-saving installation of the compressed gas motor in z. B. prevents a hollow cylindrical recording of a device, spindle or vice.

Die DE 10 2013 020 985 A1 betrifft eine elektrische Maschine, insbesondere für einen Kraftwagen. Die elektrische Maschine umfasst ein Gehäuse, mit einer zumindest teilweise in dem Gehäuse angeordneten Rotorwelle, welche um eine Drehachse relativ zu dem Gehäuse drehbar ist. Ferner ist ein mit der Rotorwelle drehfest verbundenes Rotorteil und ein damit korrespondierendes, zumindest mittelbar am Gehäuse festgelegtes Statorteil vorgesehen, welches eine Sensoreinrichtung zum Erfassen wenigstens einer eine Drehung der Rotorwelle relativ zu dem Gehäuse charakterisierenden Messgröße aufweist. Die Sensoreinrichtung ist als Drehzahl- und/oder Winkelsensor ausgebildet und umfasst einen Statorteil, der zumindest mittelbar am Gehäuse festgelegt ist. Die Sensoreinrichtung umfasst auch ein mit dem Statorteil korrespondierendes Rotorteil, welches drehfest mit der Rotorwelle verbunden ist.the DE 10 2013 020 985 A1 relates to an electrical machine, in particular for a motor vehicle. The electrical machine comprises a housing with a rotor shaft which is at least partially arranged in the housing and which can be rotated about an axis of rotation relative to the housing. Also provided is a rotor part non-rotatably connected to the rotor shaft and a corresponding stator part fixed at least indirectly to the housing, which has a sensor device for detecting at least one measured variable characterizing a rotation of the rotor shaft relative to the housing. The sensor device is designed as a speed and/or angle sensor and includes a stator part which is fixed at least indirectly to the housing. The sensor device also includes a rotor part that corresponds to the stator part and is connected to the rotor shaft in a torque-proof manner.

Die DE 10 2015 219 502 A1 betrifft eine Antriebseinrichtung zur Bereitstellung einer Linearbewegung, mit einem Antriebsgehäuse, in dem ein elektrischer Drehantrieb aufgenommen ist, der einen Stator umfasst, in dem ein Rotor drehbeweglich um eine Rotationsachse gegenüber dem Stator angeordnet ist. Der Rotor ist von einer Ausnehmung durchsetzt, die mit einem Innengewinde versehen ist, sowie mit einer Kolbenstange, die sich längs der Rotationsachse des Rotors erstreckt und mit einem auf das Innengewinde angepassten Gewindeabschnitt beweglich im Rotor aufgenommen ist. Der Koppelstange und/oder dem Rotor ist eine Sensoreinrichtung für eine Ermittlung einer Position der Koppelstange gegenüber dem Antriebsgehäuse zugeordnet. Die Sensoreinrichtung ist wahlweise als Schaltmittel oder als Proportionalsensor ausgebildet.the DE 10 2015 219 502 A1 relates to a drive device for providing a linear movement, having a drive housing in which an electric rotary drive is accommodated, which includes a stator in which a rotor is arranged such that it can rotate about an axis of rotation relative to the stator. The rotor is penetrated by a recess which is provided with an internal thread, and with a piston rod which extends along the axis of rotation of the rotor and is movably accommodated in the rotor with a threaded section adapted to the internal thread. A sensor device for determining a position of the coupling rod relative to the drive housing is assigned to the coupling rod and/or the rotor. The sensor device is designed either as a switching device or as a proportional sensor.

Die DE 10 2016 226 293 A1 betrifft eine bürstenlose elektrische Maschine. Die Maschine umfasst ein Gehäuse, mit wenigstens einem Rotor, der auf einer in dem Gehäuse drehbar gelagerten Welle angeordnet ist, und mit einem Stator, wobei dem Rotor eine berührungsfrei arbeitende Rotorlageerkennungseinrichtung zugeordnet ist. Die Rotorlageerkennungs-einrichtung weist einen auf der Welle drehfest angeordneten mehrpoligen Magnetring und wenigstens einen radial dem Außenumfang des Magnetrings zugeordneten Magnetfeld sensitiven Sensor auf.the DE 10 2016 226 293 A1 relates to a brushless electric machine. The machine comprises a housing with at least one rotor, which is arranged on a shaft rotatably mounted in the housing, and with a stator, with a contact-free rotor position detection device being assigned to the rotor. The rotor position detection device has a multi-pole magnet ring arranged in a rotationally fixed manner on the shaft and at least one magnetic field-sensitive sensor assigned radially to the outer circumference of the magnet ring.

Die DE 10 2019 122 046 A1 betrifft eine Vorrichtung zur Messung der Winkelstellung einer Welle. Die Vorrichtung umfasst ein erstes Gehäuseteil sowie eine in dem ersten Gehäuseteil angeordnete und um eine Rotationsachse drehbare Welle. Die Vorrichtung umfasst weiter eine Magneteinheit mit mindestens einem Permanentmagneten, der an der Welle befestigt ist, ein zweites Gehäuseteil mit einem Vorsprung, der sich entlang der Rotationsachse erstreckt, sowie ein im Innern des Vorsprungs des zweiten Gehäuseteils angeordnetes Magnetfeld-Sensorelement.the DE 10 2019 122 046 A1 relates to a device for measuring the angular position of a shaft. The device comprises a first housing part and a shaft which is arranged in the first housing part and can be rotated about an axis of rotation. The device further comprises a magnet unit with at least one permanent magnet fixed to the shaft, a second housing part with a projection extending along the axis of rotation, and a magnetic field sensor element arranged inside the projection of the second housing part.

Davon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine druckgasbetriebene Antriebseinrichtung der eingangs genannten Art derart weiterzubilden, dass eine einfache und platzsparende Montage des Druckgasmotors ermöglicht wird. Insbesondere soll ermöglicht werden, die druckgasbetriebene Antriebseinrichtung auch ohne Gehäuse unmittelbar in einer hohlzylinderförmigen Aufnahme zu montieren.Proceeding from this, the present invention is based on the object of further developing a compressed gas-operated drive device of the type mentioned at the outset in such a way that simple and space-saving assembly of the compressed gas engine is made possible. In particular, it should be made possible to mount the compressed gas-operated drive device directly in a hollow-cylindrical receptacle even without a housing.

Die Aufgabe wird gemäß der Erfindung dadurch gelöst, dass die Markierung die Lamellenschlitze sind. Die Erfassung der Markierung erfolgt somit im Arbeitsraum, so dass eine kompakte Bauform ermöglicht wird. Ferner werden die bereits in dem Rotor vorhandenen Lammellenschlitze verwendet, so dass keine neuen Markierungen geschaffen werden müssen.The object is achieved according to the invention in that the markings are the slat slots. The marking is thus detected in the working area, so that a compact design is made possible. Furthermore, the lamella slots already present in the rotor are used, so that no new markings have to be created.

Die erfindungsgemäße Ausführung zeichnet sich dadurch aus, dass sich die Lamellenschlitze in eine Stirnfläche des Rotors erstrecken, wobei die Stirnfläche einem der Lagerschilde zugewandt ist und wobei das Sensorelement in einem der Lagerschilde angeordnet und auf die Lamellenschlitze ausgerichtet ist.The embodiment according to the invention is characterized in that the lamella slots extend into an end face of the rotor, the end face facing one of the end shields and the sensor element being arranged in one of the end shields and aligned with the lamella slots.

Gegenüber dem Stand der Technik wird der Vorteil erreicht, dass das Sensorelement nicht radial über eine zylinderförmige Oberfläche des Gehäuses der druckgasbetriebenen Antriebseinrichtung vorsteht. Dadurch wird die Montage der druckgasbetriebenen Antriebseinrichtung in einer zylinderförmigen Aufnahme ermöglicht.Compared to the prior art, the advantage is achieved that the sensor element does not protrude radially beyond a cylindrical surface of the housing of the drive device operated by compressed gas. This enables the compressed gas-operated drive device to be installed in a cylindrical receptacle.

Bei einer besonders bevorzugten Ausführungsform ist vorgesehen, dass in dem Lagerschild eine in axialer Richtung parallel zu der Drehachse verlaufende Aufnahme ausgebildet ist, in der das Sensorelement der Sensoreinrichtung angeordnet ist. Dadurch wird eine besonders kompakte Bauform ermöglicht.In a particularly preferred embodiment, it is provided that in the bearing plate there is a receptacle which runs in the axial direction parallel to the axis of rotation and in which the sensor element of the sensor device is arranged. This enables a particularly compact design.

Die Aufnahme kann als eine Axialbohrung ausgebildet sein. Zudem kann die Bohrung als Gewindebohrung ausgeführt sein, in der das Sensorelement eingeschraubt ist.The recording can be designed as an axial bore. In addition, the bore can be designed as a threaded bore into which the sensor element is screwed.

Das Sensorelement kann als kontaktloser Sensor wie induktiver, kapazitiver, optischer und/oder magnetischer Sensor ausgebildet sein.The sensor element can be designed as a contactless sensor such as an inductive, capacitive, optical and/or magnetic sensor.

Eine besonders kompakte Bauform zeichnet sich dadurch aus, dass das Sensorelement in einem hinteren, d.h. der Antriebsseite abgewandten Lagerschild angeordnet ist.A particularly compact design is characterized by the fact that the sensor element is arranged in a rear bearing plate, i.e. one that faces away from the drive side.

Gemäß einer eigenerfinderischen Ausführungsform betrifft die Erfindung eine Druckgasbetriebene Antriebseinrichtung, umfassend einen Druckgasmotor mit einem Stator, einem relativ zu diesem unter Beaufschlagung mit Druckluft um eine Drehachse drehenden Rotor, der eine die Drehachse definierende Rotorwelle aufweist, die über Lagerschilde am Stator drehbar gelagert ist, sowie einer Sensoreinrichtung mit einem Sensorelement zum Ermitteln eines Drehzustands oder einer Drehzahl des Rotors relativ zum Stator, wobei das Sensorelement zur Ermittlung des Drehzustands oder der Drehzahl des Rotors auf eine mit dem Rotor gekoppelte Markierung ausgerichtet ist. Dabei ist vorgesehen, dass die Markierung auf einer Stirnfläche eines radial von der Rotorwelle ausgehenden Körpers ausgebildet ist, wobei die Stirnfläche des Körpers einem der Lagerschilde zugewandt ist und wobei das Sensorelement in einem der Lagerschilde angeordnet und auf die Markierung ausgerichtet ist.According to an inventive embodiment, the invention relates to a compressed gas-operated drive device, comprising a compressed gas motor with a stator, a rotor which rotates relative to this about an axis of rotation when subjected to compressed air and has a rotor shaft that defines the axis of rotation and is rotatably mounted on the stator via end shields, as well as a sensor device having a sensor element for determining a rotational state or a speed of the rotor relative to the stator, the sensor element for determining the rotational state or the speed of the rotor being aligned with a marking coupled to the rotor. It is provided that the marking on an end face of a radially from the rotor shaft outgoing body is formed, wherein the end face of the body faces one of the bearing plates and wherein the sensor element is arranged in one of the bearing plates and aligned with the marking.

Gemäß einer besonders bevorzugten Ausführung ist vorgesehen, dass der Körper der Rotor ist und dass die Stirnfläche mit der Markierung eine Stirnfläche des Rotors ist. Auch dadurch wird eine besonders kompakte und robuste Bauform ermöglicht.According to a particularly preferred embodiment, it is provided that the body is the rotor and that the end face with the marking is an end face of the rotor. This also enables a particularly compact and robust design.

Der Körper kann auch eine Scheibe oder ein Teil einer Scheibe sein, die parallel zu der Stirnfläche des Rotors verläuft und von der Rotorwelle mittig durchsetzt wird. Der Körper kann in einem Arbeitsraum des Rotors oder außerhalb des Arbeitsraums an einem das Lagerschild durchsetzenden Ende der Rotorwelle angeordnet sein.The body can also be a disk or part of a disk which runs parallel to the end face of the rotor and is centrally penetrated by the rotor shaft. The body can be arranged in a working space of the rotor or outside of the working space at an end of the rotor shaft that passes through the bearing plate.

Weitere Einzelheiten, Vorteile und Merkmale der Erfindung ergeben sich nicht nur aus den Ansprüchen, den diesen zu entnehmenden Merkmalen - für sich und/oder in Kombination -, sondern auch aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels.Further details, advantages and features of the invention result not only from the claims, the features to be taken from them - individually and/or in combination - but also from the following description of a preferred exemplary embodiment.

Es zeigen:

Fig. 1
eine Schnittdarstellung einer druckgasbetriebenen Antriebseinrichtung,
Fig. 2
eine perspektivische Darstellung eines Rotors,
Fig. 3a
eine perspektivische Darstellung des Druckgasmotors ohne Gehäuse,
Fig. 3b
eine Explosionsdarstellung des Druckgasmotors und
Fig. 4
eine Schnittdarstellung einer an einen Druckluftmotor anflanschbaren Getriebeeinheit.
Show it:
1
a sectional view of a compressed gas-operated drive device,
2
a perspective view of a rotor,
Figure 3a
a perspective view of the compressed gas engine without housing,
Figure 3b
an exploded view of the compressed gas engine and
4
a sectional view of a gear unit that can be flanged onto a compressed air motor.

Fig. 1 zeigt in Schnittdarstellung eine druckgasbetriebene Antriebseinrichtung 10 mit einen Druckgasmotor 12, der in einem Gehäuse 14 angeordnet ist. Das Gehäuse 14 umfasst eine Hülse 16, die stirnseitig jeweils mit einem Gehäusedeckel 16, 18 abgeschlossen ist. 1 shows a sectional view of a compressed gas-operated drive device 10 with a compressed gas motor 12, which is arranged in a housing 14. The housing 14 includes a sleeve 16 which is closed at the end with a housing cover 16, 18 in each case.

Der Druckgasmotor 12 umfasst einen Stator 20 und einen relativ zu diesem unter Beaufschlagung von Druckgas um eine Drehachse 22 drehenden Rotor 24 mit einer Rotorwelle 26, die die Drehachse 22 definiert. Die Rotorwelle 26 ist über Lagerelemente 28, 30 jeweils in einem vorderen und einem hinteren Lagerschild 32, 34 an dem Stator 20 drehbar gelagert.The compressed gas motor 12 comprises a stator 20 and a rotor 24 which rotates about an axis of rotation 22 relative thereto when compressed gas is applied, with a rotor shaft 26 which defines the axis of rotation 22 . The rotor shaft 26 is rotatably mounted on the stator 20 via bearing elements 28, 30 in a front and a rear bearing plate 32, 34, respectively.

Der Stator 20 umfasst einen in die Hülse 16 eingesetzten Zylinder 36, der einen Antriebsraum 38 umschließt. Der Antriebsraum 38 ist über einen Zufuhrkanal 40 mit Druckgas beaufschlagbar, wobei der Zufuhrkanal 40 durch den Gehäusedeckel 18 und das Lagerschild 32 verläuft und in den Antriebsraum 38 mündet. Die Abluft wird über einen Abluftkanal 42 abgeführt.The stator 20 includes a cylinder 36 which is inserted into the sleeve 16 and encloses a drive space 38 . The drive chamber 38 can be pressurized with compressed gas via a supply channel 40 , the supply channel 40 running through the housing cover 18 and the bearing plate 32 and opening into the drive chamber 38 . The exhaust air is discharged via an exhaust air duct 42 .

Ein vorderer Abschnitt 44 der Rotorwelle 26 ist mit einer Getriebestufe 46 gekoppelt. Die Getriebestufe 46 umfasst eine Antriebswelle 48, die über Lagerelemente 50, 52 in dem Gehäuse 16 drehbar gelagert und über ein Planetengetriebe 54 mit dem Abschnitt 44 der Rotorwelle 26 gekoppelt ist.A front section 44 of the rotor shaft 26 is coupled to a gear stage 46 . The gear stage 46 includes a drive shaft 48 which is rotatably mounted in the housing 16 via bearing elements 50, 52 and is coupled to the section 44 of the rotor shaft 26 via a planetary gear 54.

Gemäß der Erfindung weist die druckgasbetriebene Antriebseinrichtung 10 eine Sensoreinrichtung 56 auf, um eine Drehzahl des Rotors 24 relativ zum Stator 20 zu ermitteln.According to the invention, the compressed gas-operated drive device 10 has a sensor device 56 in order to determine a rotational speed of the rotor 24 relative to the stator 20 .

Gemäß der Erfindung ist vorgesehen, dass die Sensoreinrichtung 54 ein Sensorelement 58 aufweist, das in dem hinteren Lagerschild 32 derart angeordnet und ausgerichtet ist, um eine auf einer Stirnfläche 60 des Rotors 24 ausgebildete Markierung 61 abzutasten. Dabei ist vorgesehen, dass das Sensorelement 58 in einer Axialbohrung 62 aufgenommen ist, die parallel oder im Wesentlich parallel zu der Drehachse 22 verläuft und in dem Lagerschild 32 ausgebildet ist.According to the invention, it is provided that the sensor device 54 has a sensor element 58 which is arranged and aligned in the rear end shield 32 in such a way as to scan a marking 61 formed on an end face 60 of the rotor 24 . It is provided that the sensor element 58 is accommodated in an axial bore 62 which runs parallel or substantially parallel to the axis of rotation 22 and is formed in the bearing plate 32 .

Fig. 2 zeigt den Rotor 24 mit Rotorwelle 26 in einer perspektivischen Darstellung. 2 shows the rotor 24 with rotor shaft 26 in a perspective view.

In dem Rotor 24 sind in Längsrichtung, vorzugsweise gleichmäßig in Umfangsrichtung verteilt, Lamellenschlitze 64.1, 64.2, 64.3, 64.4, 64.5 ausgebildet, die sich zumindest bis in die hintere Stirnfläche 60 des Rotors 24 erstrecken und die Markierung 61 ausbilden.Lamella slots 64.1, 64.2, 64.3, 64.4, 64.5 are formed in the rotor 24 in the longitudinal direction, preferably evenly distributed in the circumferential direction, which extend at least into the rear end face 60 of the rotor 24 and form the marking 61.

Das Sensorelement 58 ist als berührungsloser Sensor, wie z. B. induktiver Sensor, ausgebildet. Mittels des Sensorelementes 58 werden bei Drehung des Rotors 24 die in der Stirnfläche 60 mündenden Lamellenschlitze 64.1, 64.2, 64.3, 64.4, 64.5 als die Markierung 61 erfasst. Bei einer Drehung des Rotors erfasst das Sensorelement 58 einen Materialwechsel zwischen metallischer Stirnfläche 60 und nichtmetallischem Lamellenschlitz, wodurch jeweils ein Puls erzeugt wird, der durch eine Auswerteeinrichtung ausgewertet werden kann, um die Drehzahl bzw. eine Drehbewegung des Rotors zu erfassen. Bei einer Umdrehung werden bei der dargestellten Ausführungsform somit fünf Impulse erzeugt.The sensor element 58 is a non-contact sensor such. B. inductive sensor formed. When the rotor 24 rotates, the sensor element 58 detects the lamella slots 64.1, 64.2, 64.3, 64.4, 64.5 that open into the end face 60 as the marking 61. When the rotor rotates, the sensor element 58 detects a change in material between the metallic end face 60 and the non-metallic lamellar slot, which generates a pulse that can be evaluated by an evaluation device in order to detect the speed or rotational movement of the rotor. Five pulses are thus generated during one revolution in the illustrated embodiment.

Durch die Anordnung des Sensorelementes 58 in dem Lagerschild 32 und parallel oder im Wesentlichen parallel zu der Drehachse 22 wird eine besonders kompakte Bauform erreicht. Gegenüber dem Stand der Technik wird der Vorteil erreicht, dass die Sensoreinrichtung 56 nicht in radialer Richtung über das zylinderförmige Gehäuse 16 hinausragt.By arranging the sensor element 58 in the end shield 32 and parallel or substantially parallel to the axis of rotation 22, a particularly compact design is achieved. Compared to the prior art, the advantage is achieved that the sensor device 56 does not protrude beyond the cylindrical housing 16 in the radial direction.

Folglich kann der Druckluftmotor aufgrund der zylinderförmigen Oberfläche platzsparend in einer hohlzylinderförmigen Aufnahme, auch ohne Gehäuse16, aufgenommen bzw. integriert werden.Consequently, due to the cylindrical surface, the compressed air motor can be accommodated or integrated in a space-saving manner in a hollow-cylindrical receptacle, even without a housing 16 .

Fig. 3a zeigt den erfindungsgemäßen Druckgasmotor 12 in Form eines eigenerfinderischen Einbaumotors ohne Gehäuse 14, der platzsparend unmittelbar in einer zylinderförmigen Aufnahme z. B. einer Vorrichtung, Spindel oder eines Schraubstocks eingebaut werden kann. Hier zeigt sich der besondere Vorteil der vorliegenden Erfindung, wobei die Sensoreinrichtung 56 in der Axialbohrung 62 des Lagerschildes 32 angeordnet ist und somit die platzsparende Montage auch ohne Gehäuse 14 erst ermöglicht. Die Lagerschilde 32, 34 sind stirnseitig mit dem Stator 20 verbunden und bilden eine kompakte Einheit, die auch ohne Gehäuse 14 verbaut werden kann. Figure 3a shows the compressed gas motor 12 according to the invention in the form of a self-inventive built-in motor without a housing 14, which saves space directly in a cylindrical receptacle z. B. a device, spindle or a vice can be installed. This is where the particular advantage of the present invention becomes apparent, with the sensor device 56 being arranged in the axial bore 62 of the bearing plate 32 and thus making space-saving assembly possible even without a housing 14 in the first place. The end shields 32, 34 are connected to the stator 20 at the end and form a compact unit that can also be installed without a housing 14.

Fig. 3b zeigt eine Explosionsdarstellung des Druckgasmotors 12. Die Lamellenschlitze 64.1, 64.2, 64.3, 64.4, 64.5 sind zur Aufnahme korrespondierender Lamellen 65.1, 65.2, 65.3, 65.4, 65.5 ausgebildet. Die Lamellen 65.1, 65.2, 65.3, 65.4, 65.5 werden in die Lamellenschlitze 64.1, 64.2, 64.3, 64.4, 64.5 eingelegt, so dass diese bei Rotation des Rotors in radialer Richtung beweglich sind und im Betrieb des Motors gegen eine innere Fläche des Zylinders 36 anliegen, wodurch Strömungskanäle zum Antrieb des Rotors 24 ausgebildet werden. Figure 3b shows an exploded view of the compressed gas engine 12. The slat slots 64.1, 64.2, 64.3, 64.4, 64.5 are designed to accommodate corresponding slats 65.1, 65.2, 65.3, 65.4, 65.5. The lamellae 65.1, 65.2, 65.3, 65.4, 65.5 are inserted into the lamellar slots 64.1, 64.2, 64.3, 64.4, 64.5 so that when the Rotor are movable in the radial direction and abut during operation of the engine against an inner surface of the cylinder 36, whereby flow channels for driving the rotor 24 are formed.

Fig. 4 zeigt eine Schnittdarstellung einer eigenerfinderischen Getriebestufe 66, die mit einer Rotorwelle 68 eines Druckluftmotors 70 gekoppelt ist. Die Getriebestufe 66 umfasst ein Planetengetriebe 72, welches formschlüssig mit einem Ende der Rotorwelle 68 gekoppelt ist. Über das Planetengetriebe 72 wird eine Antriebswelle 74 angetrieben. Die Antriebswelle 74 ist über ein Lagerelement 76 in einem Gehäuse 76 der Getriebestufe 66 drehbar gelagert. Das Gehäuse 76 ist mit einem Gehäusedeckel 78 stirnseitig abgedeckt. In dem Gehäusedeckel 78 ist eine sich in radialer Richtung erstreckende Aufnahme 80, wie Bohrung, ausgebildet, in der eine Sensoreinrichtung 82 aufgenommen ist. Die Sensoreinrichtung 82 umfasst ein Sensorelement 84, welches mit einer auf der Antriebswelle 74 angeordneten Sensormutter 86 zusammenwirkt. Die Sensormutter 84 weist umfangsseitig verschiedene Magnetisierungen auf, die von dem Sensorelement 84 berührungslos erfasst werden, um die Drehzahl bzw. Drehung der Antriebswelle 74 zu messen. 4 shows a sectional view of an inventive gear stage 66 which is coupled to a rotor shaft 68 of a compressed air motor 70 . The gear stage 66 includes a planetary gear 72 which is positively coupled to one end of the rotor shaft 68 . A drive shaft 74 is driven via the planetary gear 72 . The drive shaft 74 is rotatably mounted in a housing 76 of the gear stage 66 via a bearing element 76 . The housing 76 is covered at the end with a housing cover 78 . In the housing cover 78 there is a receptacle 80, such as a bore, which extends in the radial direction and in which a sensor device 82 is accommodated. The sensor device 82 includes a sensor element 84 which interacts with a sensor nut 86 arranged on the drive shaft 74 . The sensor nut 84 has different magnetizations on its circumference, which are detected without contact by the sensor element 84 in order to measure the rotational speed or rotation of the drive shaft 74 .

Durch die erfindungsgemäße Anordnung der Sensoreinrichtung 82 in der Getriebestufe wird ermöglicht, dass das Gehäuse des angeflanschten Druckluftmotors 70 seine zylinderförmige Gestalt beibehält, was für viel Anwendungsfälle von Vorteil ist, um eine optimale Einbauposition für den Druckluftmotor 70 zu ermöglichen.The inventive arrangement of the sensor device 82 in the gear stage makes it possible for the housing of the flanged-on compressed air motor 70 to retain its cylindrical shape, which is advantageous for many applications in order to enable an optimal installation position for the compressed air motor 70.

Claims (7)

Druckgasbetriebene Antriebseinrichtung (10), umfassend einen Druckgasmotor (14) mit einem Stator (20), einem relativ zu diesem unter Beaufschlagung mit Druckluft um eine Drehachse (22) drehenden Rotor (24), der in Längsrichtung der Drehachse (22) verlaufende Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) und eine die Drehachse (22) definierende Rotorwelle (26) aufweist, die über Lagerschilde (32, 34) am Stator (20) drehbar gelagert ist, sowie einer Sensoreinrichtung (56) mit einem Sensorelement (58) zum Ermitteln eines Drehzustands oder einer Drehzahl des Rotors (24) relativ zum Stator (20), wobei das Sensorelement (58) zur Ermittlung des Drehzustands oder der Drehzahl des Rotors (24) auf eine mit dem Rotor (24) gekoppelte Markierung (61) ausgerichtet ist,
dadurch gekennzeichnet,
dass die Markierung (61) die Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) sind.Compressed-gas-operated drive device (10), comprising a compressed-gas motor (14) with a stator (20), a rotor (24) which rotates relative thereto about an axis of rotation (22) under the action of compressed air, and which has lamellar slots ( 64.1, 64.2, 64.3, 64.4, 64.5) and a rotor shaft (26) defining the axis of rotation (22), which is rotatably mounted on the stator (20) via end shields (32, 34), and a sensor device (56) with a sensor element (58) for determining a rotational state or a speed of the rotor (24) relative to the stator (20), wherein the sensor element (58) for determining the rotational state or the speed of the rotor (24) to a marker coupled to the rotor (24). (61) is aligned,
characterized,
that the marking (61) is the slat slots (64.1, 64.2, 64.3, 64.4, 64.5). Druckgasbetriebene Antriebseinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
dass sich die Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) in eine Stirnfläche (60) des Rotors (24) erstrecken, dass die Stirnfläche (60) einem der Lagerschilde (32, 34) zugewandt ist und dass das Sensorelement (58) in einem der Lagerschilde (32, 34) angeordnet und auf die Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) ausgerichtet ist.Compressed gas-operated drive device according to claim 1,
characterized,
that the lamella slots (64.1, 64.2, 64.3, 64.4, 64.5) extend into an end face (60) of the rotor (24), that the end face (60) faces one of the end shields (32, 34) and that the sensor element (58 ) is arranged in one of the end shields (32, 34) and aligned with the lamella slots (64.1, 64.2, 64.3, 64.4, 64.5). Druckgasbetriebene Antriebseinrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass in dem Lagerschild (32, 34) eine in axialer Richtung parallel zu der Drehachse (22) verlaufende Aufnahme (62) ausgebildet ist, in der das Sensorelement (58) angeordnet ist, wobei vorzugsweise die Aufnahme (62) als eine Axialbohrung ausgebildet ist.Compressed gas-operated drive device according to claim 1 or 2,
characterized,
that in the bearing plate (32, 34) there is a receptacle (62) running in the axial direction parallel to the axis of rotation (22) and in which the sensor element (58) is arranged, wherein preferably the receptacle (62) is designed as an axial bore. Druckgasbetriebene Antriebseinrichtung nach zumindest einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass die Axialbohrung (62) als Gewindebohrung ausgeführt ist, in der die Sensoreinrichtung (56) mit Sensorelement (58) eingeschraubt ist.Compressed gas-operated drive device according to at least one of the preceding claims,
characterized,
that the axial bore (62) is designed as a threaded bore into which the sensor device (56) with the sensor element (58) is screwed. Druckgasbetriebene Antriebseinrichtung nach zumindest einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
dass das Sensorelement (58) als kontaktloser Sensor, insbesondere als induktiver, kapazitiver, optischer und/oder magnetischer Sensor ausgebildet ist.Compressed gas-operated drive device according to at least one of the preceding claims,
characterized,
that the sensor element (58) is designed as a contactless sensor, in particular as an inductive, capacitive, optical and/or magnetic sensor. Verfahren zur Bestimmung eines Drehzustandes, wie Drehzahl, eines Rotors (24) einer druckgasbetriebenen Antriebseinrichtung (10), umfassend einen Druckgasmotor (14) mit einem Stator (20), einem relativ zu diesem unter Beaufschlagung mit Druckluft um eine Drehachse (22) drehenden Rotor (24), der in Längsrichtung verlaufende Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) und eine die Drehachse (22) definierende Rotorwelle (26) aufweist, die über Lagerschilde (32, 34) am Stator (20) drehbar gelagert ist, sowie einer Sensoreinrichtung (56) mit einem Sensorelement (58), das zur Ermittlung des Drehzustandes des Rotors (24) auf eine mit dem Rotor (24) gekoppelte Markierung (61) ausgerichtet ist und diese erfasst,
dadurch gekennzeichnet,
dass als Markierung (61) die Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) des Rotors (24) erfasst werden.Method for determining a rotational state, such as speed, of a rotor (24) of a compressed gas-operated drive device (10), comprising a compressed gas motor (14) with a stator (20), a rotor rotating relative to this about an axis of rotation (22) when compressed air is applied (24), which has lamellar slots (64.1, 64.2, 64.3, 64.4, 64.5) running in the longitudinal direction and a rotor shaft (26) which defines the axis of rotation (22) and is rotatably mounted on the stator (20) via end shields (32, 34). , as well as a sensor device (56) with a sensor element (58) which, in order to determine the rotational state of the rotor (24), is aligned with a marking (61) coupled to the rotor (24) and detects this,
characterized,
that the slat slots (64.1, 64.2, 64.3, 64.4, 64.5) of the rotor (24) are recorded as the marking (61). Verfahren nach Anspruch 6,
dadurch gekennzeichnet,
dass die Lamellenschlitze (64.1, 64.2, 64.3, 64.4, 64.5) durch das Sensorelement (58) kontaktlos, insbesondere induktiv, kapazitiv, optisch und/oder magnetisch erfasst werden.Method according to claim 6,
characterized,
that the slat slots (64.1, 64.2, 64.3, 64.4, 64.5) are detected by the sensor element (58) without contact, in particular inductively, capacitively, optically and/or magnetically.
EP22154722.7A 2021-02-02 2022-02-02 Pneumatic motor with rotary position measuring and method for measuring rotational speed Pending EP4036371A1 (en)

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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004027386A1 (en) * 2004-06-04 2006-01-05 Vse Volumentechnik Gmbh Flow rate sensors
DE102013020985A1 (en) 2013-12-12 2014-08-14 Daimler Ag Electric machine i.e. traction machine, for driving e.g. electric car, has rotor shaft arranged in housing, and rotor part and stator outweighed in retainer and radially and inwardly arranged without overlapping in relation to rotor shaft
DE102015219502A1 (en) 2015-10-08 2017-01-19 Festo Ag & Co. Kg driving means
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DE102016115930A1 (en) * 2016-08-26 2018-03-01 MD Drucklufttechnik GmbH & Co. KG Compressed gas operated drive device and compressed gas processing system
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