EP1272737B1 - Air motor - Google Patents

Air motor Download PDF

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Publication number
EP1272737B1
EP1272737B1 EP01931593A EP01931593A EP1272737B1 EP 1272737 B1 EP1272737 B1 EP 1272737B1 EP 01931593 A EP01931593 A EP 01931593A EP 01931593 A EP01931593 A EP 01931593A EP 1272737 B1 EP1272737 B1 EP 1272737B1
Authority
EP
European Patent Office
Prior art keywords
air
motor according
rotor
motor
rotor cover
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.)
Expired - Lifetime
Application number
EP01931593A
Other languages
German (de)
French (fr)
Other versions
EP1272737A1 (en
Inventor
Konrad Karl Kettner
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.)
Apex Tool Group GmbH and Co OHG
Original Assignee
Cooper Power Tools GmbH and Co OHG
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 Cooper Power Tools GmbH and Co OHG filed Critical Cooper Power Tools GmbH and Co OHG
Publication of EP1272737A1 publication Critical patent/EP1272737A1/en
Application granted granted Critical
Publication of EP1272737B1 publication Critical patent/EP1272737B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • F01C1/3446—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 more than one line or surface
    • 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
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01C13/02—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving hand-held tools or the like

Definitions

  • the invention relates to an air motor, in particular for a screwdriver, with the features of the preamble of claim 1.
  • an air motor which is installed in a screwdriver.
  • the Screwdriver has a compressed air connection to the air inlet of the air motor To be able to supply compressed air.
  • the compressed air passes through the air inlet in one of the Chambers between the engine cylinder and air rotor and acts on one of the fins. As a result, the air rotor is rotated.
  • Another chamber gets in touch with the air inlet, while the already pressurized with compressed air chamber via a corresponding Air outlet releases the compressed air to the environment again.
  • the known air motor has two mutually opposite to the air rotor chambers on.
  • Such an air motor has a relatively high idle speed and overall performance on. Partly, the power or the speed of such an air motor through Exhaust air throttling measures are reduced.
  • EP 052162 shows a rotary piston machine with sliding slides for operation with expanding Gases, this rotary engine being the features of the generic term of claim 1.
  • This rotary engine is pressurized by gases converted directly into a rotating movement, the pressure always being exactly in tangential Direction to the rotary motion to act.
  • a cover plate openings are arranged, via the gas enters or exits. The openings are arranged at the ends of a drum, to allow the tangential supply of the gas.
  • FR 2762879 shows a compressor with a cylindrical rotating body as a rotor. By doing Rotor are inclined to the radial direction a number of fins in corresponding grooves adjustable. In corresponding chambers upon rotation of the rotor becomes a fluid compressed and discharged via outlets to the outside.
  • the invention is in view of EP052162 the object of an air motor of to improve the above-mentioned type to the effect that at the same time good Efficiency of the engine a more uniform acceleration, a reduced Sound level and less wear while reducing the exhaust air throttle measures is possible.
  • the three-chamber engine according to the invention results in a lower engine speed and at the same time a more uniform acceleration capacity due to the three chambers.
  • a two-chamber engine results in an increase in torque and also due to reduced speed, a reduced sound level. Due to the lower engine speed when screwing are consuming Zu Kunststoff- and Abluftdrosselform especially with non-disconnecting screw no longer necessary.
  • an oil-free running of the engine is rather possible due to the lower speed as in the known one-chamber and two-chamber engines.
  • the construction will continue simplified on the outside of each triangle side at least one air inlet and an air outlet passage adjacent to each other in the longitudinal direction of the air motor run. As a result, it is not necessary, for example, corresponding channels in the housing form or provide air inlet or outlet only at the ends of the housing.
  • a selection of the direction of rotation of the air rotor takes place in that the rear and / or Front rotor cover for alternative supply of air inlet and outlet channel with Air are rotatable relative to the engine cylinder.
  • the corresponding holes in the rotor lid with the air inlet ducts for example, to clockwise rotation or communicating with the air outlet ducts, for example to turn the air rotor counterclockwise.
  • the hole in the rotor lid is decided which of these channels to the air inlet or air outlet is used.
  • the interior of the engine cylinder is a cross-section of an isosceles Triangle, wherein the axis of rotation of the air rotor, in particular at the intersection of the three Middle perpendicular of the corresponding triangle sides is arranged.
  • the Triangular sides of the engine cylinder at least in the region of the respective perpendicular bisector be convex curved.
  • the curvature is essentially in agreement with the curvature of the Air rotor match.
  • the slats in a simple manner along an inner surface can lead the engine cylinder with their free ends, such an inner surface of the motor cylinder preferably convexly curved at least in the region of the triangular points be. In this way, the free ends of the slats slide along without difficulty the inner surface in particular in the region of the triangle peaks.
  • the inner surface of the engine cylinder in the area the triangular points have the same radii of curvature.
  • a simple production for air inlet and air outlet channel results, if, for example both channels are formed in a channel body of the engine cylinder.
  • the outside diameter should be of the engine cylinder lie on such a circle that the entire engine cylinder in a screwdriver with a receptacle with a correspondingly larger diameter can be used.
  • Diameter of the circular line is substantially smaller than a diameter of a front and / or rear rotor lid.
  • These rotor lids seal the chambers in Longitudinal direction of the air motor lying front and rear ends and serve simultaneously for supporting a shaft formed with the air rotor mostly in one piece.
  • An advantageous production of the air motor can result from the fact that the channel body extending between the front and rear rotor lids over the entire length of the engine cylinder extend.
  • An air supply to the air inlets for example, from the radial direction relative to Engine cylinder done.
  • the rear rotor covers have at least air inlets for supplying air to the air inlet ducts.
  • Air inlet be formed as the rotor cover passing through hole.
  • the cross section of the bore and / or air inlet duct may have different shapes to have. In the simplest case, such a cross section may be circular.
  • the outlet recess may be opened radially outward via an outlet gap.
  • the outlet recess can when connected to an exhaust duct at one of its ends with its other end in it a region between triangular tip and channel body extends.
  • outlet recess in conjunction with a corresponding assigned Outlet channel in the direction of rotation of the air rotor downstream chamber also to dissipate air into the environment.
  • the outlet recess is sufficiently large in this context, if an inner radius the outlet recess is substantially equal to an outer radius of the air motor.
  • air inlet and outlet air duct on the inside of the engine cylinder extending over part of their respective length have in the direction of air rotor open slots separated by a sealing ridge are, with the air rotor in sealing contact.
  • the air rotor for example, four corresponding longitudinal slots and arranged therein Have lamellas. However, for a more even acceleration of the air motor more lamellae and corresponding longitudinal slots desirable, such as five, six, seven, eight or more longitudinal slots with corresponding slats. For one Even running of the air rotor without corresponding imbalance, it is still from Advantage, if the longitudinal slots with the corresponding blades in the circumferential direction equal are spaced.
  • the chambers in one to be filled with air and one of air To be able to subdivide emptying sub-chamber safely, one of the length of the outlet recess circumferentially assigned center angle greater than an angle between be two adjacent lamellae.
  • each one compression spring between two diametrically opposed slats can be arranged.
  • the Longitudinal slits in the air rotor just in the areas through the Druck Kunststoffaus traditions traditions Compressed air is supplied, in which the corresponding fins in the area of the chambers off pushed out of the air rotor.
  • the compressed air recesses can be equally spaced from each other in the circumferential direction of the Center hole arranged and / or laterally open to the central bore was. About the side Opening to the center hole can easily the compressed air supply through the center hole done to the compressed air recesses.
  • an air distribution device for supplying compressed air to the air inlets of the rear rotor cover at the be arranged the air rotor opposite side.
  • the air distribution device can be disc-shaped are formed and three of a central air supply bore radially outward have extending air distribution grooves on the side facing the rear rotor cover side.
  • the Luftver discouragesnuten in the circumferential direction equally spaced from each other and depending on the relative position to the rear rotor cover be associated with a group of air inlets for Druck Kunststoffbeetzschlagung.
  • the Air outlets pass through the rear rotor cover to the chambers in the axial direction Vent.
  • the rear rotor cover in two positions relative to the engine cylinder for Leftward and clockwise rotation of the air motor to be stored latched. It should be noted at this point that, of course, instead of a rotation of the rear rotor cover relative to the engine cylinder It is also possible, front rotor cover and engine cylinder relative to a rotationally fixed to rotate arranged rear rotor lid and so between left and right turn to switch the air motor.
  • the adjustment can take place in that radial outward from the rear rotor lid or from the front rotor lid or from Engine cylinder protrudes a shift button. It is also possible that the detent to Definition of the two positions for the left and right rotation of the air motor by means of Shift button is done.
  • the air motor may have a motor housing, wherein the motor housing an air supply passage communicating with the air supply bore and a bearing the output shaft of the air rotor rotor bore can have.
  • a pin between be arranged front rotor cover and engine cylinder To record the reaction force of the engine cylinder, a pin between be arranged front rotor cover and engine cylinder.
  • the reaction moment of the front Rotor cover for example, by a Schersplint or the like to the Motor housing to be transferred.
  • FIG. 1 shows a longitudinal section through an air motor 1 according to the invention.
  • This has an output shaft 51 extending concentrically to a rotation axis 16, which is integrally formed with an air rotor 3, see Figure 5.
  • the air motor 1 has in Area of the output shaft 51 a rear rotor cover 31 and in the direction of rotation axis sixteenth spaced from this one front rotor lid 32. Between the two rotor covers an engine cylinder 2 is arranged.
  • a disc-shaped Air distribution 61 arranged at one end 9, opposite to the Beerverteil owned 61, the rear rotor lid 31 outlet column 37, which in radial Open to the outside. These are between the rear rotor lid 31 and arranged the engine cylinder 2.
  • Rotor cylinder 2, rear and front rotor cover 31, 32 have a substantially circular cross section.
  • the engine cylinder 2 has in its longitudinal direction 4 and in the longitudinal direction of the air motor first extending side edges 52, 53, see also Figure 5, which is inclined radially inward extend.
  • the side flanks 52, 53 separate channel bodies 26 and triangular tips 13, 14, 15, see also Figure 6.
  • the triangular tips 13, 14, 15 form the corresponding peaks a cross-sectionally substantially triangular interior of the engine cylinder. 2
  • the substantially circular cross section of the motor cylinder 2 results from corresponding triangular sides 19, 20, 21, see Figures 5 and 6, on the outer sides thereof 23 projecting channel body 26, wherein both the triangular tips 13, 14, 15 and the Channel body 26 are rounded on their outer surfaces and along a circular line 28, see Figure 6, run.
  • This circle 28 has a diameter slightly less than Diameter 29 of Figure 1 on.
  • Air distribution device 61 Opposite to the engine cylinder 2 is laterally adjacent to the rear rotor cover 31 a Air distribution device 61 is arranged. This has approximately in the middle of an air supply hole 65 on. In this partially protrudes from the air rotor 3 protruding stub shaft.
  • the air supply bore 65 is provided with an air supply passage 66 in the motor housing 64 connected.
  • three air distribution grooves 62 from, see also Figure 3, with corresponding air inlets 10, 11 depending on relative rotational position of the rear rotor cover 31 to the air distribution device 61 in conjunction are.
  • the rear rotor cover 31 has on its the Lucasverteiler issued 61 zu putden Side a concentric to the axis of rotation 16 arranged recess in which a ball bearing 56 is arranged for rotatably supporting the stub shaft of the air motor 3.
  • a ball bearing 56 is arranged for rotatably supporting the stub shaft of the air motor 3.
  • the front rotor cover 32 has analogous to the rear rotor cover 31 in its from the air rotor 3 side facing a concentric with the axis of rotation 16 arranged recess in which also a ball bearing 55 is arranged. Through this, the output shaft extends 51 of the air motor 3rd
  • Rear and front rotor cover, engine cylinder with air rotor and air distribution device 61 are arranged in the motor housing 64, which in the illustrated embodiment is formed in two parts.
  • a cup-shaped part 68 has in its bottom the air supply duct 66 on and on its free ends is a cover-like part 69 of the motor housing 64 screwed.
  • the rear rotor cover 31 is connected to a switch button 63, which is from the rear Rotor cover radially outwardly passed through the motor housing 64 and from the Outside is operable.
  • the switch button 63 can be locked in two positions, wherein a position of the rear rotor cover 31 of a left turn, see Figure 5, and the another position of a clockwise rotation, see Figure 7, the air motor 3 corresponds.
  • FIG. 2 shows a view of an inner side of the rear rotor cover 31 from the direction of the Motor cylinder 2 shown in Figure 1.
  • various holes 34 are arranged as air inlets 33. All in all six holes 34 are provided, of which three in each case with a corresponding rotation of the front rotor cover 31 relative to the engine cylinder 2, an air rotor 3, see Figure 5, drive in clockwise or counterclockwise direction by compressed air supply. Between the holes 34 outlet recesses 36 are arranged as air outlets 35.
  • the Outlet recesses 36 are formed part-circular ring and extend over a Length 47 in the circumferential direction 48, which corresponds to a center angle 49. Radially to Outside are outlet recesses 36 via outlet gap 37, see also Figure 1, with the environment of the air motor 1 in conjunction.
  • An inner radius 41 of the outlet recess 36 corresponds essentially to an outer radius 42, see Figure 5, of the air motor 3.
  • the diameter 30 of both the rear and front rotor lid 31, 32 is substantially equal to the diameter 29 of the engine cylinder Second
  • FIG. 3 a front view of the air distribution device 61 is seen from the direction of the rear Rotor cover 31 shown in Figure 1. Concentric with the axis of rotation 16 respectively in the disk-shaped air distribution device 61, the air supply hole 65 is arranged. Of this extend in the circumferential direction 60 equally spaced three air distribution grooves 62 recessed in the visible surface of the air distribution device 61 of FIG 3 are arranged and laterally open in the direction of air supply bore 65, see also FIG. 1
  • FIG. 4 shows an inside view of the engine cylinder 2 in the region of a channel body 26 partially shown.
  • Air inlet channel 24 and an air outlet channel 25 are parallel and spaced from each other in the channel body, see also FIGS. 5 and 6.
  • the two channels 24, 25 via slots 54, 55 in the direction of air rotor 3 open see also Figures 5 and 6.
  • the slots 44, 45 extend approximately central to the channels 24, 25 over part of their length.
  • FIG. 5 shows a section along the line V-V from FIG. Same parts are with the same reference numerals and are only partially mentioned.
  • FIG. 5 shows the essentially triangular cross-section of the engine cylinder 2 recognizable, which is an isosceles triangle with triangle sides 19, 20, 21 and corresponding triangular tips 13, 14 and 15, see also Figure 6.
  • Die The axis of rotation 16 extends through an intersection 17 of mid-perpendiculars 18 of the triangle sides 19, 20, 21.
  • the channel body 26 In the region of the perpendicular bisector, see FIG. 6, are on outer sides 23 the triangular sides 19, 20, 21, the channel body 26, each with an air inlet channel 24 and an air outlet channel 25 is arranged. These are over their slots 44, 45 in the direction Air rotor 3 opened. Between the channels 24, 25 each have a sealing ridge 46 is arranged, with the air rotor 3 in sealing contact.
  • an air inlet 10 see Figure 2
  • the air outlet channels 25 are in communication with the outlet recesses 36 as a corresponding air outlet 12, see Figure 2.
  • the outlet recesses 36 are included arranged with one end 38 in the region of the mouth of the air outlet channel 25 and extend to their other end 39 in the area of the corresponding chambers 7, 8, 9.
  • the outer radius 42 of the air motor 3 is substantially the inner radius 41, see Figure 2, the outlet recesses 36 is.
  • the air rotor 3 has eight longitudinal slots 5, in which a corresponding number of slats 6 are guided in the radial direction.
  • Two adjacent lamellae 6 are each under an angle 50 to each other, which is smaller than the center angle 49, the length 47 of the outlet recess 36 is assigned, see Figure 2.
  • FIG. 5 as an alternative to the compression springs 57 according to FIG. 7, the rear rotor cover 31 formed with the compressed air recesses 59, the partially offset radially inwards to the extended slats 6 in the longitudinal slots 5 are visible. These serve for Compressed air feed into the slots and thus to extend the slats.
  • a radial clearance between air rotor and engine cylinder is as small as possible.
  • An orientation of the engine cylinder is taken over by the air rotor itself and an external center, z, B. in a housing, due to dimensional tolerances leads to overdetermination of the engine cylinder installation position.
  • FIG. 6 a section analogous to FIG. 5 is shown only by the engine cylinder 2. On the Description in connection with the preceding figures is made.
  • FIG. 6 shows, in particular, how mid-perpendiculars 18 of the triangle sides 19, 20, 21 intersect at a point 17 which corresponds to the axis of rotation 16.
  • the area of the corresponding bases of the mid-perpendiculars 18 are the triangle sides on the inside 22 of the engine cylinder 2 convexly curved, this curvature in particular in the region of the corresponding sealing webs 46 of the outer curvature of the air rotor 3 corresponds.
  • the outer contour or outer surface 27 of the motor cylinder 2 extends in the region of the triangle tips 13, 14, 15 and the corresponding channel body 26 curved along a Circle line 28 with diameter 29, see Figure 1.
  • FIG. 7 shows a section analogous to FIG. 5 for a clockwise rotation of the air motor 3.
  • the same parts are provided with the same reference numerals and it is on the description refer to Figure 5.
  • FIG. 7 differs from FIG. 5 essentially only in that in the longitudinal slots 5 springs 57 arranged to pressurize the slats radially outward are and that the rear rotor cover 31 at about 90 ° relative to the position of FIG 5 is rotated in the counterclockwise direction.

Abstract

An air motor, especially for a screwer, comprises an air rotor which is rotatably supported in a motor cylinder and comprises a plurality of longitudinal slits extending in the longitudinal direction of the rotor for radially guiding lamellae, the air rotor and motor cylinder having formed thereinbetween chambers which can be brought into communication with an air inlet and/or an air outlet. To achieve a high efficiency of the motor together with a more uniform accelerating power, a reduced sound level and less wear while the exhaust air throttling measures are reduced at the same time, the motor cylinder comprises an inner chamber of an essentially triangular cross-section, one chamber each being formed between air rotor and a triangle tip.

Description

Die Erfindung betrifft einen Luftmotor, insbesondere für einen Schrauber, mit den Merkmalen des Oberbegriffs des Patentanspruchs 1.The invention relates to an air motor, in particular for a screwdriver, with the features of the preamble of claim 1.

Aus der Praxis ist ein Luftmotor bekannt, der in einem Schrauber eingebaut ist. Der Schrauber verfügt über einen Druckluftanschluss, um dem Lufteinlass des Luftmotors Druckluft zuführen zu können. Die Druckluft gelangt durch den Lufteinlass in eine der Kammern zwischen Motorzylinder und Luftrotor und beaufschlagt eine von den Lamellen. Dadurch wird der Luftrotor gedreht. Eine weitere Kammer gerät dann in Verbindung mit dem Lufteinlass, während die bereits mit Druckluft beaufschlagte Kammer über einen entsprechenden Luftauslass die Druckluft an die Umgebung wieder abgibt. Durch das alternierende Befüllen und Entleeren der Kammern mit Druckluft und durch die Beaufschlagung der radial vom Luftrotor nach außen vorstehenden Lamellen mit Druckluft erfolgt insgesamt eine Drehung des Luftrotors und der mit diesem verbundenen Abtriebsachse. Dadurch wird ein entsprechendes Schraubwerkzeug zum Einschrauben oder Lösen einer Schraube oder dergleichen gedreht.From practice an air motor is known, which is installed in a screwdriver. Of the Screwdriver has a compressed air connection to the air inlet of the air motor To be able to supply compressed air. The compressed air passes through the air inlet in one of the Chambers between the engine cylinder and air rotor and acts on one of the fins. As a result, the air rotor is rotated. Another chamber then gets in touch with the air inlet, while the already pressurized with compressed air chamber via a corresponding Air outlet releases the compressed air to the environment again. By the alternating Filling and emptying the chambers with compressed air and by the application of the radially from the air rotor to the outside projecting lamellae with compressed air takes place in total a rotation of the air rotor and connected to this output shaft. This will a corresponding screwing tool for screwing or loosening a screw or like that turned.

Der bekannte Luftmotor weist zwei einander relativ zum Luftrotor gegenüberliegende Kammern auf. Ein solcher Luftmotor weist eine relativ hohe Leerlaufdrehzahl und Gesamtleistung auf. Teilweise muss die Leistung bzw. die Drehzahl eines solchen Luftmotors durch Abluftdrosselmaßnahmen reduziert werden.The known air motor has two mutually opposite to the air rotor chambers on. Such an air motor has a relatively high idle speed and overall performance on. Partly, the power or the speed of such an air motor through Exhaust air throttling measures are reduced.

EP 052162 zeigt eine Drehkolbenmaschine mit gleitenden Schiebern zum Betrieb mit expandierenden Gasen, wobei diese Drehkolbenmaschine die Merkmale des Oberbegriffs des Patentanspruchs 1 offenbart. Bei dieser Drehkolbenmaschine wird Druck von Gasen direkt in eine rotierende Bewegung umgewandelt, wobei der Druck immer genau in tangentialer Richtung zur Drehbewegung wirken soll. In einer Deckplatte sind Öffnungen angeordnet, über die Gas eintritt oder austritt. Die Öffnungen sind an Enden einer Trommel angeordnet, um die tangentiale Zufuhr des Gases zu ermöglichen.EP 052162 shows a rotary piston machine with sliding slides for operation with expanding Gases, this rotary engine being the features of the generic term of claim 1. This rotary engine is pressurized by gases converted directly into a rotating movement, the pressure always being exactly in tangential Direction to the rotary motion to act. In a cover plate openings are arranged, via the gas enters or exits. The openings are arranged at the ends of a drum, to allow the tangential supply of the gas.

FR 2762879 zeigt einen Kompressor mit einem zylindrischen Drehkörper als Rotor. In dem Rotor sind geneigt zur Radialrichtung eine Anzahl von Lamellen in entsprechenden Nuten verstellbar gelagert. In entsprechenden Kammern wird bei Drehung des Rotors ein Fluid verdichtet und über Auslässe nach außen abgegeben.FR 2762879 shows a compressor with a cylindrical rotating body as a rotor. By doing Rotor are inclined to the radial direction a number of fins in corresponding grooves adjustable. In corresponding chambers upon rotation of the rotor becomes a fluid compressed and discharged via outlets to the outside.

Der Erfindung liegt im Hinblick auf EP052162 die Aufgabe zugrunde, einen Luftmotor der eingangs genannten Art dahingehend zu verbessern, dass bei einem gleichzeitig guten Wirkungsgrad des Motors ein gleichmäßigeres Beschleunigungsvermögen, ein reduzierter Schallpegel und weniger Verschleiß bei gleichzeitiger Reduktion der Abluftdrosselmaßnahmen möglich ist.The invention is in view of EP052162 the object of an air motor of to improve the above-mentioned type to the effect that at the same time good Efficiency of the engine a more uniform acceleration, a reduced Sound level and less wear while reducing the exhaust air throttle measures is possible.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Bei dem erfindungsgemäßen Dreikammer-Motor ergibt sich eine geringere Motordrehzahl und gleichzeitig ein gleichmäßigeres Beschleunigungsvermögen aufgrund der drei Kammern. Bei gleicher Baugröße wie bei einem Zweikammer-Motor ergibt sich eine Drehmomentsteigerung und ebenso aufgrund reduzierter Drehzahl ein reduzierter Schallpegel. Durch die geringere Motordrehzahl beim Eindrehen sind aufwendige Zuluft- und Abluftdrosselmaßnahmen insbesondere bei nicht abschaltenden Schraubem nicht mehr notwendig. Gleichzeitig ist aufgrund der niedrigeren Drehzahl ein ölfreier Lauf des Motors eher möglich als bei den bekannten Einkammer- und Zweikammer- Motoren. Die Bauweise wird weiterhin dadurch vereinfacht, dass auf Außenseiten jeder Dreiecksseite wenigstens ein Lufteinlass- und ein Luftauslass- Kanal benachbart zueinander in Längsrichtung des Luftrotors verlaufen. Dadurch ist es nicht notwendig, beispielsweise entsprechende Kanäle im Gehäuse auszubilden oder Lufteinlass oder Auslass nur an Enden des Gehäuses vorzusehen. In the three-chamber engine according to the invention results in a lower engine speed and at the same time a more uniform acceleration capacity due to the three chambers. With the same size as a two-chamber engine results in an increase in torque and also due to reduced speed, a reduced sound level. Due to the lower engine speed when screwing are consuming Zuluft- and Abluftdrosselmaßnahmen especially with non-disconnecting screw no longer necessary. At the same time an oil-free running of the engine is rather possible due to the lower speed as in the known one-chamber and two-chamber engines. The construction will continue simplified on the outside of each triangle side at least one air inlet and an air outlet passage adjacent to each other in the longitudinal direction of the air motor run. As a result, it is not necessary, for example, corresponding channels in the housing form or provide air inlet or outlet only at the ends of the housing.

Eine Auswahl der Drehrichtung des Luftrotors erfolgt dadurch, dass der hintere und/oder vordere Rotordeckel zur alternativen Versorgung von Lufteinlass- bzw. Auslasskanal mit Luft relativ zum Motorzylinder verdrehbar sind. So sind einerseits die entsprechenden Bohrungen im Rotordeckel mit den Lufteinlasskanälen beispielsweise zu Drehungen in Uhrzeigerrichtung oder mit den Luftauslasskanälen in Verbindung bringbar, um beispielsweise den Luftrotor in Gegenuhrzeigerrichtung zu drehen. Durch die entsprechende Zuordnung der Bohrung im Rotordeckel wird dabei entschieden, welcher dieser Kanäle zum Lufteinlass bzw. Luftauslass dient.A selection of the direction of rotation of the air rotor takes place in that the rear and / or Front rotor cover for alternative supply of air inlet and outlet channel with Air are rotatable relative to the engine cylinder. So on the one hand, the corresponding holes in the rotor lid with the air inlet ducts, for example, to clockwise rotation or communicating with the air outlet ducts, for example to turn the air rotor counterclockwise. By the appropriate assignment the hole in the rotor lid is decided which of these channels to the air inlet or air outlet is used.

Um auch die Luft aus den Kammern über dem Rotordeckel abzuführen, sind im vorderen und/oder hinteren Rotordeckel entsprechende Luftauslässe ausgebildet, die mit Lufteinlassoder Luftauslasskanal je nach Zuordnung der entsprechenden Lufteinlasskanäle im Rotordeckel verbunden sind. Dabei sind die Luftauslässe als zumindest zum Rotorzylinder offene Auslassvertiefungen ausgebildet. Mit einer solchen steht zumindest der entsprechende Luftauslasskanal zur schnellen Abgabe von Luft in Verbindung. Dadurch, dass sich die Auslassvertiefungen teilkreisringförmig erstrecken, erfolgt bereits im Bereich der entsprechenden Kammern eine Abgabe der expandierten Druckluft. Durch diese Anordnung der Auslassvertiefungen ergibt sich ein besseres Expansionsverhältnis als bei bekannten Luftmotoren und gleichzeitig ergibt sich eine Leistungssteigerung, ohne dass die Baugröße des Luftmotors vergrößert wird. To dissipate the air from the chambers above the rotor lid, are in the front and / or rear rotor lid corresponding air outlets formed with air inlet or Air outlet duct depending on the assignment of the corresponding air intake ducts in the rotor lid are connected. The air outlets are open as at least to the rotor cylinder Exhaust wells trained. With such is at least the corresponding Air outlet duct for quick release of air in connection. Because of that Exhaust recesses extend part circular ring, already takes place in the area of the corresponding Chambers a discharge of the expanded compressed air. By this arrangement of Outlet recesses results in a better expansion ratio than in known air motors and at the same time results in an increase in performance, without the size of the Air motor is increased.

Um eine Selbstzentrierung des Luftrotors in einfacher Weise zu ermöglichen weist vorteilhafter Weise der Innenraum des Motorzylinders einen Querschnitt eines gleichschenkligen Dreiecks auf, wobei die Drehachse des Luftrotors insbesondere im Schnittpunkt der drei Mittelsenkrechten der entsprechenden Dreiecksseiten angeordnet ist.In order to enable a self-centering of the air rotor in a simple manner has more advantageous Way the interior of the engine cylinder is a cross-section of an isosceles Triangle, wherein the axis of rotation of the air rotor, in particular at the intersection of the three Middle perpendicular of the corresponding triangle sides is arranged.

Um den Luftrotor in diesem Zusammenhang noch besser zentriert zu lagern, können die Dreiecksseiten des Motorzylinders zumindest im Bereich der jeweiligen Mittelsenkrechten konvex gekrümmt sein. Die Krümmung stimmt dabei im wesentlichen mit der Krümmung des Luftrotors überein.To better center the air rotor in this context, the Triangular sides of the engine cylinder at least in the region of the respective perpendicular bisector be convex curved. The curvature is essentially in agreement with the curvature of the Air rotor match.

Um bei Drehung des Luftrotors die Lamellen in einfacher Weise entlang einer Innenfläche des Motorzylinders mit ihren freien Enden führen zu können, kann eine solche Innenfläche des Motorzylinders bevorzugt zumindest im Bereich der Dreiecksspitzen konvex gekrümmt sein. Auf diese Weise gleiten die freien Enden der Lamellen ohne Schwierigkeiten entlang der Innenfläche insbesondere auch im Bereich der Dreiecksspitzen.Upon rotation of the air rotor, the slats in a simple manner along an inner surface can lead the engine cylinder with their free ends, such an inner surface of the motor cylinder preferably convexly curved at least in the region of the triangular points be. In this way, the free ends of the slats slide along without difficulty the inner surface in particular in the region of the triangle peaks.

Zur vereinfachten Herstellung des Motorzylinders und um eine möglichst gleichmäßige Bewegung des Luftrotors zu ermöglichen, kann die Innenfläche des Motorzylinders im Bereich der Dreiecksspitzen gleiche Krümmungsradien aufweisen. To simplify the production of the engine cylinder and to ensure the smoothest possible movement allow the air motor, the inner surface of the engine cylinder in the area the triangular points have the same radii of curvature.

Eine einfache Herstellung für Lufteinlass- und Luftauslasskanal ergibt sich, wenn beispielsweise beide Kanäle in einem Kanalkörper des Motorzylinders ausgebildet sind.A simple production for air inlet and air outlet channel results, if, for example both channels are formed in a channel body of the engine cylinder.

Um den erfindungsgemäßen Luftmotor in einfacher Weise in einem entsprechenden Schrauber ohne maßliche Überbestimmung unterbringen zu können, sollte der Außendurchmesser des Motorzylinders auf einer solchen Kreislinie liegen, dass der gesamte Motorzylinder in einem Schrauber mit einer Aufnahme mit entsprechend größerem Durchmesser einsetzbar ist.To the air motor according to the invention in a simple manner in a corresponding To accommodate screwdrivers without dimensional overdetermination, the outside diameter should be of the engine cylinder lie on such a circle that the entire engine cylinder in a screwdriver with a receptacle with a correspondingly larger diameter can be used.

In diesem Zusammenhang ist es weiterhin als vorteilhaft zu betrachten, wenn auch der Durchmesser der Kreislinie im wesentlichen kleiner als ein Durchmesser eines vorderen und/oder hinteren Rotordeckels ist. Diese Rotordeckel verschließen die Kammern an in Längsrichtung des Luftrotors liegenden vorderen und hinteren Enden und dienen gleichzeitig zur Lagerung einer mit dem Luftrotor zumeist einteilig gebildeten Welle.In this context, it continues to be considered advantageous, although the Diameter of the circular line is substantially smaller than a diameter of a front and / or rear rotor lid. These rotor lids seal the chambers in Longitudinal direction of the air motor lying front and rear ends and serve simultaneously for supporting a shaft formed with the air rotor mostly in one piece.

Eine vorteilhafte Fertigung des Luftmotors kann sich dadurch ergeben, dass die Kanalkörper sich zwischen den vorderen und hinteren Rotordeckeln über die gesamte Länge des Motorzylinders erstrecken.An advantageous production of the air motor can result from the fact that the channel body extending between the front and rear rotor lids over the entire length of the engine cylinder extend.

Eine Luftzufuhr zu den Lufteinlässen kann beispielsweise aus radialer Richtung relativ zum Motorzylinder erfolgen. Dabei kann die Luftzuführung zwischen beispielsweise einem Rotordeckel und dem Motorzylinder erfolgen. Bei einem einfachen Ausführungsbeispiel kann der hintere Rotordeckel wenigstens Lufteinlässe zur Luftzufuhr zu den Lufteinlasskanälen aufweisen.An air supply to the air inlets, for example, from the radial direction relative to Engine cylinder done. In this case, the air supply between, for example, a rotor lid and the engine cylinder done. In a simple embodiment, the rear rotor covers have at least air inlets for supplying air to the air inlet ducts.

Um die Luft in Längsrichtung von Motorzylinder bzw. Luftrotor zuzuführen, kann ein solcher Lufteinlass als den Rotordeckel durchsetzende Bohrung ausgebildet sein.To supply the air in the longitudinal direction of the engine cylinder or air rotor, such Air inlet be formed as the rotor cover passing through hole.

Der Querschnitt von Bohrung und/oder Lufteinlasskanal können unterschiedliche Formen haben. Im einfachsten Fall kann ein solcher Querschnitt kreisförmig sein. The cross section of the bore and / or air inlet duct may have different shapes to have. In the simplest case, such a cross section may be circular.

Zur Abführung der Luft aus den entsprechenden Kammern insbesondere in radialer Richtung, kann die Auslassvertiefung radial nach außen über einen Auslassspalt geöffnet sein.For removing the air from the corresponding chambers, in particular in the radial direction, For example, the outlet recess may be opened radially outward via an outlet gap.

Um nicht nur über den Auslasskanal sondern auch zumindest teilweise direkt aus der entsprechenden Kammer Luft nach außen abgeben zu können, kann die Auslassvertiefung sich bei Verbindung mit einem Auslasskanal an einem ihrer Enden mit ihren anderen Ende bis in einem Bereich zwischen Dreiecksspitze und Kanalkörper erstreckt.Not only about the exhaust duct but also at least partially directly from the corresponding one Chamber can deliver air to the outside, the outlet recess can when connected to an exhaust duct at one of its ends with its other end in it a region between triangular tip and channel body extends.

Auf diese Weise kann die Auslassvertiefung in Verbindung mit einer dem entsprechend zugeordneten Auslasskanal in Drehrichtung des Luftrotors nachgeordneten Kammer ebenfalls zur Abführung von Luft in die Umgebung in Verbindung stehen.In this way, the outlet recess in conjunction with a corresponding assigned Outlet channel in the direction of rotation of the air rotor downstream chamber also to dissipate air into the environment.

Die Auslassvertiefung ist in diesem Zusammenhang ausreichend groß, wenn ein Innenradius der Auslassvertiefung im wesentlichen gleich einem Außenradius des Luftrotors ist.The outlet recess is sufficiently large in this context, if an inner radius the outlet recess is substantially equal to an outer radius of the air motor.

Um im Bereich von Lufteinlass- und Luftauslasskanal eine ausreichende Menge von Luft entsprechend schnell zu- bzw. abführen zu können, können Lufteinlass- und Luftauslasskanal auf der Innenseite des Motorzylinders sich über einen Teil ihrer jeweiligen Länge erstreckende, in Richtung Luftrotor offene Schlitze aufweisen, die durch einen Dichtsteg getrennt sind, mit dem der Luftrotor in dichtender Anlage ist. To in the range of air inlet and outlet duct a sufficient amount of air can supply and remove accordingly fast, air inlet and outlet air duct on the inside of the engine cylinder extending over part of their respective length, have in the direction of air rotor open slots separated by a sealing ridge are, with the air rotor in sealing contact.

Der Luftrotor kann beispielsweise vier entsprechende Längsschlitze und darin angeordnete Lamellen aufweisen. Zur gleichmäßigeren Beschleunigung des Luftrotors sind allerdings mehr Lamellen und entsprechende Längsschlitze wünschenswert, wie beispielsweise fünf, sechs, sieben, acht oder mehr Längsschlitze mit entsprechenden Lamellen. Für einen gleichmäßigen Lauf des Luftrotors ohne entsprechende Unwucht ist es dabei weiterhin von Vorteil, wenn die Längsschlitze mit den entsprechenden Lamellen in Umfangsrichtung gleich beabstandet sind.The air rotor, for example, four corresponding longitudinal slots and arranged therein Have lamellas. However, for a more even acceleration of the air motor more lamellae and corresponding longitudinal slots desirable, such as five, six, seven, eight or more longitudinal slots with corresponding slats. For one Even running of the air rotor without corresponding imbalance, it is still from Advantage, if the longitudinal slots with the corresponding blades in the circumferential direction equal are spaced.

Um durch die Lamellen die Kammern in eine mit Luft zu befüllende und eine von Luft zu entleerende Teilkammer sicher unterteilen zu können, kann ein der Länge der Auslassvertiefung in Umfangsrichtung zugeordneter Mittelpunktswinkel größer als ein Winkel zwischen zwei benachbarten Lamellen sein.To pass through the slats, the chambers in one to be filled with air and one of air To be able to subdivide emptying sub-chamber safely, one of the length of the outlet recess circumferentially assigned center angle greater than an angle between be two adjacent lamellae.

Um die Lamellen in einfacher Weise in radialer Richtung nach außen mit Kraft zu beaufschlagen, werden bevorzugt gradzahlige Anzahlen von Längsschlitzen und Lamellen verwendet, wobei jeweils eine Druckfeder zwischen zwei diametral gegenüberliegender Lamellen angeordnet sein kann.To force the lamellae in a simple manner in the radial outward direction with force, are preferably used even numbers of longitudinal slots and lamellae, each one compression spring between two diametrically opposed slats can be arranged.

Um zusätzlich oder alternativ zu den Druckfedern die Lamellen an ihren radial inneren Enden mit Druckluft zu beaufschlagen, kann der hintere Rotordeckel um eine Mittelbohrung angeordnete Druckluftausnehmungen aufweisen, die sich konzentrisch zur Mittelbohrung erstrecken. Je nach Positionierung des hinteren Rotordeckels zum Motorzylinder wird den Längsschlitzen im Luftrotor gerade in den Bereichen durch die Druckluftausnehmungen Druckluft zugeführt, in denen die entsprechenden Lamellen im Bereich der Kammern aus dem Luftrotor ausgeschoben werden.In addition or alternatively to the compression springs, the lamellae at their radially inner ends pressurized with compressed air, the rear rotor cover around a center hole arranged compressed air recesses which are concentric with the central bore extend. Depending on the positioning of the rear rotor cover to the engine cylinder is the Longitudinal slits in the air rotor just in the areas through the Druckluftausnehmungen Compressed air is supplied, in which the corresponding fins in the area of the chambers off pushed out of the air rotor.

Um die Lamellen gleichmäßig und in dem Bereich der Kammern mit Druckluft zu versorgen, können die Druckluftausnehmungen gleich beabstandet zueinander in Umfangsrichtung der Mittelbohrung angeordnet und/oder seitlich zur Mittelbohrung geöffnet sei. Über die seitliche Öffnung zur Mittelbohrung kann in einfacher Weise die Druckluftzufuhr über die Mittelbohrung zu den Druckluftausnehmungen erfolgen.To supply the slats evenly and in the area of the chambers with compressed air, can the compressed air recesses equally spaced from each other in the circumferential direction of the Center hole arranged and / or laterally open to the central bore was. About the side Opening to the center hole can easily the compressed air supply through the center hole done to the compressed air recesses.

Um je nach Orientierung der Lufteinlässe im hinteren Rotordeckel zur Rechts- oder Linksdrehung des Luftrotors entsprechend Druckluft zuführen zu können, kann eine Luftverteilereinrichtung zur Zufuhr von Druckluft zu den Lufteinlässen des hinteren Rotordeckels an dessen dem Luftrotor gegenüberliegender Seite angeordnet sein.Depending on the orientation of the air inlets in the rear rotor cover for clockwise or counterclockwise rotation can supply the compressed air motor according to compressed air, an air distribution device for supplying compressed air to the air inlets of the rear rotor cover at the be arranged the air rotor opposite side.

Bei einem einfachen Ausführungsbeispiel kann die Luftverteilereinrichtung scheibenförmig ausgebildet sind und drei von einer mittleren Luftversorgungsbohrung radial nach außen verlaufende Luftverteilungsnuten auf der dem hinteren Rotordeckel zuweisenden Seite aufweisen.In a simple embodiment, the air distribution device can be disc-shaped are formed and three of a central air supply bore radially outward have extending air distribution grooves on the side facing the rear rotor cover side.

Entsprechend zur Form des Luftrotors können die Luftverteilungsnuten in Umfangsrichtung gleich beabstandet zueinander angeordnet und je nach Relativposition zum hinteren Rotordeckel einer Gruppe von Lufteinlässen zur Druckluftbeaufschlagung zugeordnet sein.According to the shape of the air rotor, the Luftverteilungsnuten in the circumferential direction equally spaced from each other and depending on the relative position to the rear rotor cover be associated with a group of air inlets for Druckluftbeaufschlagung.

Statt einer Entlüftung der Kammern über die Luftauslässe radial nach außen relativ zum hinteren Rotordeckel können insbesondere bei Einsatz des erfindungsgemäßen Luftmotors in im wesentlichen geradlinigen Werkzeugen, bei Winkelschraubern oder dergleichen, die Luftauslässe den hinteren Rotordeckel durchsetzen, um in axialer Richtung die Kammern zu entlüften.Instead of venting the chambers via the air outlets radially outward relative to Rear rotor cover can in particular when using the air motor according to the invention in substantially rectilinear tools, in angle wrenches or the like, the Air outlets pass through the rear rotor cover to the chambers in the axial direction Vent.

Um in einfacher Weise zwischen Links- und Rechtsdrehung des Luftmotors umschalten zu können, kann der hintere Rotordeckel in zwei Stellungen relativ zum Motorzylinder zur Links- und Rechtsdrehung des Luftrotors rastbar gelagert sein. An dieser Stelle sei angemerkt, dass natürlich statt einer Drehung des hinteren Rotordeckels relativ zum Motorzylinder es ebenfalls möglich ist, vorderen Rotordeckel und Motorzylinder relativ zu einem drehfest angeordneten hinteren Rotordeckel zu verdrehen und so zwischen Links- und Rechtsdrehung des Luftrotors umzuschalten.To easily switch between left and right rotation of the air motor to can, the rear rotor cover in two positions relative to the engine cylinder for Leftward and clockwise rotation of the air motor to be stored latched. It should be noted at this point that, of course, instead of a rotation of the rear rotor cover relative to the engine cylinder It is also possible, front rotor cover and engine cylinder relative to a rotationally fixed to rotate arranged rear rotor lid and so between left and right turn to switch the air motor.

In beiden vorangehend genannten Fällen kann die Verstellung dadurch erfolgen, dass radial auswärts vom hinteren Rotordeckel beziehungsweise vom vorderen Rotordeckel oder vom Motorzylinder ein Umschaltknopf absteht. Ebenfalls ist es möglich, dass die Rastung zur Festlegung der beiden Stellungen zur Links- und Rechtsdrehung des Luftrotors mittels des Umschaltknopfes erfolgt.In both cases mentioned above, the adjustment can take place in that radial outward from the rear rotor lid or from the front rotor lid or from Engine cylinder protrudes a shift button. It is also possible that the detent to Definition of the two positions for the left and right rotation of the air motor by means of Shift button is done.

Um hinteren und vorderen Rotordeckel sowie Motorzylinder mit Luftrotor in einfacher Weise unterzubringen, kann der Luftmotor ein Motorgehäuse aufweisen, wobei das Motorgehäuse einen mit der Luftversorgungsbohrung in Verbindung stehenden Luftversorgungskanal und eine die Abtriebswelle des Luftrotors lagernde Rotorbohrung aufweisen kann. To rear and front rotor cover and engine cylinder with air rotor in a simple manner accommodate, the air motor may have a motor housing, wherein the motor housing an air supply passage communicating with the air supply bore and a bearing the output shaft of the air rotor rotor bore can have.

Um die Reaktionskraft des Motorzylinders aufnehmen zu können, kann ein Stift zwischen vorderem Rotordeckel und Motorzylinder angeordnet sein. Das Reaktionsmoment des vorderen Rotordeckels kann beispielsweise durch einen Schersplint oder dergleichen an das Motorgehäuse übertragen werden.To record the reaction force of the engine cylinder, a pin between be arranged front rotor cover and engine cylinder. The reaction moment of the front Rotor cover, for example, by a Schersplint or the like to the Motor housing to be transferred.

Im Zusammenhang mit dem Luftrotor sei noch darauf hingewiesen, dass dieser in seiner Axialstellung durch die beiden Rotordeckel bestimmt ist, während die Radialstellung allein durch den Luftrotor bestimmt ist, wobei ausreichend Freiraum zwischen Motorzylinder und Motorgehäuse verbleibt, indem der entsprechende Durchmesser des Motorzylinders geringer als der der Rotordeckel ist.In connection with the air rotor should be noted that this in his Axial position determined by the two rotor lid, while the radial position alone is determined by the air rotor, with sufficient clearance between the engine cylinder and Motor housing remains by the corresponding diameter of the engine cylinder less than the rotor lid is.

Ein vorteilhaftes Ausführungsbeispiel der Erfindung wird anhand der in der Zeichnung beigefügten Figuren im folgenden näher erläutert.An advantageous embodiment of the invention will become apparent from the attached in the drawing Figures explained in more detail below.

Es zeigen:

Fig. 1
einen Längsschnitt durch einen erfindungsgemäßen Luftmotor;
Fig. 2
eine Draufsicht auf einen hinteren Rotordeckel aus Richtung eines Motorzylinders;
Fig. 3
eine Ansicht einer Luftverteilereinrichtung aus Richtung hinterer Rotordeckel;
Fig. 4
eine Ansicht von innen auf eine teilweise dargestellte Dreiecksseite eines Luftrotors im Bereich von Lufteinlass- und Luftauslasskanal;
Fig. 5
einen Schnitt durch Figur 1 entlang der Linie V-V für Linksdrehung;
Fig. 6
einen Schnitt entsprechend zu Figur 5 durch einen Motorzylinder, und
Fig. 7
einen Schnitt durch Figur 1 entsprechend zu Figur 5 für Rechtsdrehung.
Show it:
Fig. 1
a longitudinal section through an air motor according to the invention;
Fig. 2
a plan view of a rear rotor cover from the direction of a motor cylinder;
Fig. 3
a view of an air distribution device from the direction of the rear rotor cover;
Fig. 4
a view from the inside of a partially illustrated triangular side of an air motor in the region of the air inlet and air outlet channel;
Fig. 5
a section through Figure 1 along the line VV for left rotation;
Fig. 6
a section corresponding to Figure 5 by an engine cylinder, and
Fig. 7
a section through Figure 1 corresponding to Figure 5 for clockwise rotation.

In Figur 1 ist ein Längsschnitt durch einen erfindungsgemäßen Luftmotors 1 dargestellt. Dieser weist eine sich konzentrisch zu einer Drehachse 16 erstreckende Abtriebswelle 51 auf, die einteilig mit einem Luftrotor 3, siehe Figur 5, ausgebildet ist. Der Luftmotor 1 weist im Bereich der Abtriebswelle 51 einen hinteren Rotordeckel 31 und in Richtung Drehachse 16 beabstandet von diesem einen vorderen Rotordeckel 32 auf. Zwischen den beiden Rotordeckeln ist ein Motorzylinder 2 angeordnet. Neben dem hinteren Rotordeckel 31 ist eine scheibenförmige Luftverteileinrichtung 61 angeordnet. An einem Ende 9, gegenüberliegend zur Luftverteileinrichtung 61 weist der hintere Rotordeckel 31 Auslassspalte 37 auf, die in radialer Richtung nach außen offen sind. Diese sind zwischen dem hinteren Rotordeckel 31 und dem Motorzylinder 2 angeordnet.FIG. 1 shows a longitudinal section through an air motor 1 according to the invention. This has an output shaft 51 extending concentrically to a rotation axis 16, which is integrally formed with an air rotor 3, see Figure 5. The air motor 1 has in Area of the output shaft 51 a rear rotor cover 31 and in the direction of rotation axis sixteenth spaced from this one front rotor lid 32. Between the two rotor covers an engine cylinder 2 is arranged. In addition to the rear rotor cover 31 is a disc-shaped Air distribution 61 arranged. At one end 9, opposite to the Luftverteileinrichtung 61, the rear rotor lid 31 outlet column 37, which in radial Open to the outside. These are between the rear rotor lid 31 and arranged the engine cylinder 2.

Rotorzylinder 2, hinterer und vorderer Rotordeckel 31, 32 weisen einen im wesentlichen kreisförmigen Querschnitt auf.Rotor cylinder 2, rear and front rotor cover 31, 32 have a substantially circular cross section.

Der Motorzylinder 2 weist in seiner Längsrichtung 4 bzw. in Längsrichtung des Luftmotors 1 verlaufende Seitenflanken 52, 53 auf, siehe auch Figur 5, die sich schräg radial nach innen erstrecken. Die Seitenflanken 52, 53 trennen Kanalkörper 26 und Dreiecksspitzen 13, 14, 15, siehe auch Figur 6. Die Dreiecksspitzen 13, 14, 15 bilden die entsprechenden Spitzen eines im Querschnitt im wesentlichen dreieckförmigen Innenraums des Motorzylinders 2.The engine cylinder 2 has in its longitudinal direction 4 and in the longitudinal direction of the air motor first extending side edges 52, 53, see also Figure 5, which is inclined radially inward extend. The side flanks 52, 53 separate channel bodies 26 and triangular tips 13, 14, 15, see also Figure 6. The triangular tips 13, 14, 15 form the corresponding peaks a cross-sectionally substantially triangular interior of the engine cylinder. 2

Der im wesentlichen kreisförmige Querschnitt des Motorzylinders 2 ergibt sich durch von entsprechenden Dreiecksseiten 19, 20, 21, siehe Figuren 5 und 6, auf deren Außenseiten 23 vorstehende Kanalkörper 26, wobei sowohl die Dreiecksspitzen 13, 14, 15 als auch die Kanalkörper 26 auf ihren Außenflächen abgerundet sind und entlang einer Kreislinie 28, siehe Figur 6, verlaufen. Diese Kreislinie 28 weist einen Durchmesser etwas geringer als Durchmesser 29 nach Figur 1 auf.The substantially circular cross section of the motor cylinder 2 results from corresponding triangular sides 19, 20, 21, see Figures 5 and 6, on the outer sides thereof 23 projecting channel body 26, wherein both the triangular tips 13, 14, 15 and the Channel body 26 are rounded on their outer surfaces and along a circular line 28, see Figure 6, run. This circle 28 has a diameter slightly less than Diameter 29 of Figure 1 on.

In Figur 1 ist der vordere Rotordeckel 32 in dichtender Anlage am vorderen Ende des Motorzylinders 2.In Figure 1, the front rotor cover 32 is in sealing engagement with the front end of the engine cylinder Second

Gegenüberliegend zum Motorzylinder 2 ist seitlich neben dem hinteren Rotordeckel 31 eine Luftverteilereinrichtung 61 angeordnet. Diese weist in etwa mittig eine Luftversorgungsbohrung 65 auf. In diese ragt teilweise eine vom Luftrotor 3 abstehende Stummelwelle hinein. Die Luftversorgungsbohrung 65 ist mit einem Luftversorgungskanal 66 im Motorgehäuse 64 verbunden. Radial nach außen stehen von der Luftversorgungsbohrung 65 auf der dem hinteren Rotordeckel 31 zuweisenden Seite der Luftverteilereinrichtung 61 drei Luftverteilungsnuten 62 ab, siehe auch Figur 3, die mit entsprechenden Lufteinlässen 10, 11 je nach relativer Drehposition von hinterem Rotordeckel 31 zur Luftverteilereinrichtung 61 in Verbindung sind. Opposite to the engine cylinder 2 is laterally adjacent to the rear rotor cover 31 a Air distribution device 61 is arranged. This has approximately in the middle of an air supply hole 65 on. In this partially protrudes from the air rotor 3 protruding stub shaft. The air supply bore 65 is provided with an air supply passage 66 in the motor housing 64 connected. Radially outward from the air supply hole 65 on the rear rotor cover 31 facing side of the air distribution device 61 three air distribution grooves 62 from, see also Figure 3, with corresponding air inlets 10, 11 depending on relative rotational position of the rear rotor cover 31 to the air distribution device 61 in conjunction are.

Der hintere Rotordeckel 31 weist auf seiner der Luftverteilereinrichtung 61 zuweisenden Seite eine konzentrisch zur Drehachse 16 angeordnete Ausnehmung auf, in der ein Kugellager 56 zur drehbaren Lagerung der Stummelwelle des Luftrotors 3 angeordnet ist. In der Ausnehmung münden Öffnungen von Druckluftausnehmungen 59, die in der von der Luftverteilereinrichtung 61 fortweisenden Seite des hinteren Rotordeckels 31 ausgebildet sind. Ein weiteres Ausführungsbeispiel für solche Druckluftausnehmungen 59 ist in Figur 2 dargestellt.The rear rotor cover 31 has on its the Luftverteilereinrichtung 61 zuweisenden Side a concentric to the axis of rotation 16 arranged recess in which a ball bearing 56 is arranged for rotatably supporting the stub shaft of the air motor 3. In the Recess open openings of Druckluftausnehmungen 59, in the of the air distribution device 61 continuing side of the rear rotor cover 31 are formed. A further exemplary embodiment of such compressed air recesses 59 is shown in FIG.

Der vordere Rotordeckel 32 weist analog zum hinteren Rotordeckel 31 in seiner vom Luftrotor 3 fortweisenden Seite eine konzentrisch zur Drehachse 16 angeordnete Ausnehmung auf, in der ebenfalls ein Kugellager 55 angeordnet ist. Durch dieses erstreckt sich die Abtriebswelle 51 des Luftrotors 3.The front rotor cover 32 has analogous to the rear rotor cover 31 in its from the air rotor 3 side facing a concentric with the axis of rotation 16 arranged recess in which also a ball bearing 55 is arranged. Through this, the output shaft extends 51 of the air motor 3rd

Hinterer und vorderer Rotordeckel, Motorzylinder mit Luftrotor und Luftverteilereinrichtung 61 sind in dem Motorgehäuse 64 angeordnet, das bei dem dargestellten Ausführungsbeispiel zweiteilig ausgebildet ist. Ein becherförmiger Teil 68 weist in seinem Boden den Luftversorgungskanal 66 auf und auf dessen freie Enden ist ein deckelartiger Teil 69 des Motorgehäuses 64 aufschraubbar.Rear and front rotor cover, engine cylinder with air rotor and air distribution device 61 are arranged in the motor housing 64, which in the illustrated embodiment is formed in two parts. A cup-shaped part 68 has in its bottom the air supply duct 66 on and on its free ends is a cover-like part 69 of the motor housing 64 screwed.

Der hintere Rotordeckel 31 ist mit einem Umschaltknopf 63 verbunden, der vom hinteren Rotordeckel radial nach außen durch das Motorgehäuse 64 hindurchgeführt und von dessen Außenseite her betätigbar ist. Der Umschaltknopf 63 kann in zwei Stellungen rastbar sein, wobei eine Stellung des hinteren Rotordeckels 31 einer Linksdrehung, siehe Figur 5, und die andere Stellung einer Rechtsdrehung, siehe Figur 7, des Luftrotors 3 entspricht.The rear rotor cover 31 is connected to a switch button 63, which is from the rear Rotor cover radially outwardly passed through the motor housing 64 and from the Outside is operable. The switch button 63 can be locked in two positions, wherein a position of the rear rotor cover 31 of a left turn, see Figure 5, and the another position of a clockwise rotation, see Figure 7, the air motor 3 corresponds.

Zur Übertragung eines Reaktionsmoments vom Motorzylinder 2 auf den vorderen Rotordeckel 32 ist zwischen diesen ein Stift 67 angeordnet. Ein entsprechendes Mittel zur Übertragung des Reaktionsmoments vom vorderen Rotordeckel 32 auf das Motorgehäuse 64 ist zur Vereinfachung nicht dargestellt.For transmitting a reaction torque from the engine cylinder 2 to the front rotor cover 32 is disposed between these a pin 67. An appropriate means of transmission of the reaction torque from the front rotor cover 32 to the motor housing 64 is for Simplification not shown.

In Figur 2 ist eine Ansicht einer Innenseite des hineren Rotordeckels 31 aus Richtung des Motorzylinders 2 nach Figur 1 dargestellt.FIG. 2 shows a view of an inner side of the rear rotor cover 31 from the direction of the Motor cylinder 2 shown in Figure 1.

In dem Rotordeckel sind verschiedene Bohrungen 34 als Lufteinlässe 33 angeordnet. Insgesamt sind sechs Bohrungen 34 vorgesehen, von denen jeweils drei bei entsprechender Verdrehung des vorderen Rotordeckels 31 relativ zum Motorzylinder 2 einen Luftrotor 3, siehe Figur 5, in Uhrzeiger- bzw. Gegenuhrzeigerrichtung durch Druckluftzufuhr antreiben. Zwischen den Bohrungen 34 sind Auslassvertiefungen 36 als Luftauslässe 35 angeordnet. Die Auslassvertiefungen 36 sind teilkreisringförmig ausgebildet und erstrecken sich über eine Länge 47 in Umfangsrichtung 48, die einem Mittelpunktswinkel 49 entspricht. Radial nach außen sind Auslassvertiefungen 36 über Auslassspalt 37, siehe auch Figur 1, mit der Umgebung des Luftmotors 1 in Verbindung.In the rotor cover various holes 34 are arranged as air inlets 33. All in all six holes 34 are provided, of which three in each case with a corresponding rotation of the front rotor cover 31 relative to the engine cylinder 2, an air rotor 3, see Figure 5, drive in clockwise or counterclockwise direction by compressed air supply. Between the holes 34 outlet recesses 36 are arranged as air outlets 35. The Outlet recesses 36 are formed part-circular ring and extend over a Length 47 in the circumferential direction 48, which corresponds to a center angle 49. Radially to Outside are outlet recesses 36 via outlet gap 37, see also Figure 1, with the environment of the air motor 1 in conjunction.

Ein Innenradius 41 der Auslassvertiefung 36 entspricht dabei im wesentlichen einem Außenradius 42, siehe Figur 5, des Luftrotors 3. Der Durchmesser 30 sowohl des hinteren als auch vorderen Rotordeckels 31, 32 ist im wesentlichen gleich dem Durchmesser 29 des Motorzylinders 2.An inner radius 41 of the outlet recess 36 corresponds essentially to an outer radius 42, see Figure 5, of the air motor 3. The diameter 30 of both the rear and front rotor lid 31, 32 is substantially equal to the diameter 29 of the engine cylinder Second

In Figur 3 ist eine Vorderansicht der Luftverteilereinrichtung 61 aus Richtung des hinteren Rotordeckels 31 nach Figur 1 dargestellt. Konzentrisch zur Drehachse 16 beziehungsweise in der scheibenförmigen Luftverteilereinrichtung 61 ist die Luftversorgungsbohrung 65 angeordnet. Von dieser erstrecken sich in Umfangsrichtung 60 gleich beabstandet drei Luftverteilungsnuten 62, die vertieft in der Sichtoberfläche der Luftverteilereinrichtung 61 nach Figur 3 angeordnet und seitlich in Richtung Luftversorgungsbohrung 65 geöffnet sind, siehe auch Figur 1.In FIG. 3, a front view of the air distribution device 61 is seen from the direction of the rear Rotor cover 31 shown in Figure 1. Concentric with the axis of rotation 16 respectively in the disk-shaped air distribution device 61, the air supply hole 65 is arranged. Of this extend in the circumferential direction 60 equally spaced three air distribution grooves 62 recessed in the visible surface of the air distribution device 61 of FIG 3 are arranged and laterally open in the direction of air supply bore 65, see also FIG. 1

In Figur 4 ist eine Ansicht von Innen auf den Motorzylinder 2 im Bereich eines Kanalkörpers 26 teilweise dargestellt. In dem Kanalkörper erstrecken sich über dessen gesamte Länge ein Lufteinlasskanal 24 und ein Luftauslasskanal 25. Diese sind parallel und beabstandet zueinander in dem Kanalkörper, siehe auch Figuren 5 und 6, angeordnet. Auf einer Innenseite 43 des Motorzylinders 2 sind die beiden Kanälen 24, 25 über Schlitze 54, 55 in Richtung Luftrotor 3 geöffnet, siehe ebenfalls Figuren 5 und 6. Die Schlitze 44, 45 erstrecken sich in etwa mittig zu den Kanälen 24, 25 über einen Teil von deren Länge.FIG. 4 shows an inside view of the engine cylinder 2 in the region of a channel body 26 partially shown. In the channel body extend over its entire length Air inlet channel 24 and an air outlet channel 25. These are parallel and spaced from each other in the channel body, see also FIGS. 5 and 6. On an inside 43 of the motor cylinder 2, the two channels 24, 25 via slots 54, 55 in the direction of air rotor 3 open, see also Figures 5 and 6. The slots 44, 45 extend approximately central to the channels 24, 25 over part of their length.

In Figur 5 ist ein Schnitt entlang der Linie V-V aus Figur 1 dargestellt. Gleiche Teile sind mit gleichen Bezugszeichen versehen und werden nur noch teilweise erwähnt.FIG. 5 shows a section along the line V-V from FIG. Same parts are with the same reference numerals and are only partially mentioned.

In Figur 5 ist insbesondere der im wesentlichen dreieckförmige Querschnitt des Motorzylinders 2 erkennbar, wobei es sich um ein gleichschenkliges Dreieck mit Dreiecksseiten 19, 20, 21 und entsprechenden Dreiecksspitzen 13, 14 und 15 handelt, siehe auch Figur 6. Die Drehachse 16 verläuft durch einen Schnittpunkt 17 von Mittelsenkrechten 18 der Dreiecksseiten 19, 20, 21. Im Bereich der Mittelsenkrechte, siehe Figur 6, sind auf Außenseiten 23 der Dreiecksseiten 19, 20, 21 die Kanalkörper 26 mit jeweils einem Lufteinlasskanal 24 und einem Luftauslasskanal 25 angeordnet. Diese sind über ihre Schlitze 44, 45 in Richtung Luftrotor 3 geöffnet. Zwischen den Kanälen 24, 25 ist jeweils ein Dichtsteg 46 angeordnet, mit dem der Luftrotor 3 in dichtender Anlage ist.In particular, FIG. 5 shows the essentially triangular cross-section of the engine cylinder 2 recognizable, which is an isosceles triangle with triangle sides 19, 20, 21 and corresponding triangular tips 13, 14 and 15, see also Figure 6. Die The axis of rotation 16 extends through an intersection 17 of mid-perpendiculars 18 of the triangle sides 19, 20, 21. In the region of the perpendicular bisector, see FIG. 6, are on outer sides 23 the triangular sides 19, 20, 21, the channel body 26, each with an air inlet channel 24 and an air outlet channel 25 is arranged. These are over their slots 44, 45 in the direction Air rotor 3 opened. Between the channels 24, 25 each have a sealing ridge 46 is arranged, with the air rotor 3 in sealing contact.

Zwischen Luftrotor 3 und den entsprechenden Dreiecksspitzen 13, 14, 15 ist jeweils eine Kammer 7, 8, 9 gebildet. Im Bereich der Dreiecksspitzen ist eine Innenfläche 22 des Motorzylinders 2 konvex gekrümmt und die entsprechenden Krümmungen weisen im Bereich aller Dreiecksspitzen gleichen Krümmungsradius auf. Im Bereich der Dreiecksseiten 19, 20, 21 ist die Innenfläche 22 in geringem Maße konvex gekrümmt, wobei insbesondere die Krümmung im Bereich des Dichtsteges 46 der entsprechenden Krümmung des Luftrotors 3 an seinem Außenumfang im wesentlichen entspricht.Between air rotor 3 and the corresponding triangular tips 13, 14, 15 is one each Chamber 7, 8, 9 formed. In the area of the triangle tips is an inner surface 22 of the engine cylinder 2 convexly curved and the corresponding curvatures are in the range of all Triangle points have the same radius of curvature. In the area of the triangle sides 19, 20, 21 the inner surface 22 is slightly convexly curved, in particular the curvature in the region of the sealing web 46 of the corresponding curvature of the air motor 3 at its outer circumference substantially corresponds.

Bei der dargestellten Relativposition von hinterem Rotordeckel 31 zu Motorzylinder 2 ist jeweils ein Lufteinlass 10, siehe Figur 2, mit einem entsprechenden Lufteinlasskanal 24 in Verbindung, während die übrigen Lufteinlässe 11, siehe nochmals Figur 2, in die Kammern 7, 8, 9 münden. Die Luftauslasskanäle 25 sind in Verbindung mit den Auslassvertiefungen 36 als entsprechendem Luftauslass 12, siehe Figur 2. Die Auslassvertiefungen 36 sind dabei mit einem Ende 38 im Bereich der Mündung des Luftauslasskanals 25 angeordnet und erstrecken sich bis zu ihrem anderen Ende 39 im Bereich der entsprechenden Kammern 7, 8, 9.In the illustrated relative position of the rear rotor cover 31 to engine cylinder 2 is respectively an air inlet 10, see Figure 2, with a corresponding air inlet channel 24 in Connection, while the remaining air inlets 11, see again Figure 2, in the chambers 7, 8, 9 lead. The air outlet channels 25 are in communication with the outlet recesses 36 as a corresponding air outlet 12, see Figure 2. The outlet recesses 36 are included arranged with one end 38 in the region of the mouth of the air outlet channel 25 and extend to their other end 39 in the area of the corresponding chambers 7, 8, 9.

Bei der dargestellten Stellung von Lufteinlässen 10 relativ zu Lufteinlasskanal 24 erfolgt eine Drehung des Luftrotors 3 in Uhrzeigerrichtung 40 (Linksdrehung). Wird der hintere Rotordeckel 31 um etwa 90° relativ zum Motorzylinder 2 gedreht, bis die Lufteinlässe 11 mit den Luftauslasskanälen 25 in Verbindung sind, dienen diese als Lufteinlasskanäle, während die bisherigen Lufteinlasskanäle 24 in Verbindung mit den Auslassvertiefungen 36 stehen und als Luftauslasskanäle dienen. Bei einer solchen Stellung des hinteren Rotordeckels 31 erfolgt eine Drehung des Luftrotors 3 in Gegenuhrzeigerrichtung (Rechtsdrehung), das heißt entgegengesetzt zur in Figur 5 dargestellten Drehrichtung 40, siehe Figur 7.In the illustrated position of air inlets 10 relative to the air inlet channel 24 is a Rotation of the air motor 3 in the clockwise direction 40 (counterclockwise rotation). Will the rear rotor lid 31 is rotated by about 90 ° relative to the engine cylinder 2 until the air inlets 11 with the Air outlet ducts 25 are connected, these serve as air intake ducts, while the previous air inlet ducts 24 are in communication with the outlet recesses 36 and serve as air outlet ducts. In such a position of the rear rotor lid 31 takes place a rotation of the air motor 3 in the counterclockwise direction (clockwise rotation), that is opposite to the direction of rotation 40 shown in FIG. 5, see FIG. 7.

Über die Auslassvertiefungen 36 erfolgt nach dem vorangehenden eine Verbindung der Kammern 7, 8, 9 mit den Auslassspalten 37 und damit mit der Umgebung des Luftmotors 1 zur Abgabe von in den Kammern enthaltener und über die Lufteinlasskanäle 24 zugeführter Druckluft. About the outlet recesses 36 takes place after the foregoing, a compound of Chambers 7, 8, 9 with the Auslassspalten 37 and thus with the environment of the air motor. 1 for dispensing contained in the chambers and via the air inlet ducts 24 supplied Compressed air.

In Figur 5 ist insbesondere erkennbar, dass der Außenradius 42 des Luftrotors 3 im wesentlichen gleich den Innenradius 41, siehe Figur 2, der Auslassvertiefungen 36 ist. Weiterhin weist der Luftrotor 3 acht Längsschlitze 5 auf, in denen eine entsprechende Anzahl von Lamellen 6 in radialer Richtung geführt sind. Zwei benachbarte Lamellen 6 sind jeweils unter einem Winkel 50 zueinander angeordnet, der kleiner als der Mittelpunktswinkel 49 ist, der der Länge 47 der Auslassvertiefung 36 zugeordnet ist, siehe Figur 2.In particular, it can be seen in FIG. 5 that the outer radius 42 of the air motor 3 is substantially the inner radius 41, see Figure 2, the outlet recesses 36 is. Farther the air rotor 3 has eight longitudinal slots 5, in which a corresponding number of slats 6 are guided in the radial direction. Two adjacent lamellae 6 are each under an angle 50 to each other, which is smaller than the center angle 49, the the length 47 of the outlet recess 36 is assigned, see Figure 2.

Zwischen zwei diametral gegenüberliegenden Lamellen ist jeweils eine Druckfeder angeordnet, die die Lamellen in radialer Richtung nach außen beaufschlagt, siehe Figur 7. Der Abstand zwischen zwei solch diametral gegenüberliegenden Lamellen bleibt wegen der Innenkontur des Motorzylinders 2 relativ konstant, so dass der Federhub sehr gering ausfällt und die Dauerfestigkeit der Feder gegeben ist.Between two diametrically opposed lamellae a compression spring is arranged in each case, which acts on the lamellae in the radial direction to the outside, see Figure 7. The Distance between two such diametrically opposed slats remains because of the inner contour of the motor cylinder 2 is relatively constant, so that the spring stroke is very low and the fatigue strength of the spring is given.

Bei Figur 5 ist als Alternative zu den Druckfedem 57 nach Figur 7 der hintere Rotordeckel 31 mit den Druckluftausnehmungen 59 ausgebildet, die teilweise radial nach innen versetzt zu den ausgefahrenen Lamellen 6 in den Längsschlitzen 5 sichtbar sind. Diese dienen zur Druckluftzuführung in die Schlitze und damit zum Ausfahren der Lamellen.In FIG. 5, as an alternative to the compression springs 57 according to FIG. 7, the rear rotor cover 31 formed with the compressed air recesses 59, the partially offset radially inwards to the extended slats 6 in the longitudinal slots 5 are visible. These serve for Compressed air feed into the slots and thus to extend the slats.

Die drei Dichtlinien zwischen Luftrotor 3 und Motorzylinder 2, siehe die entsprechenden Dichtstege 46, trennen entsprechend Zuluft von Abluft. Eine Radialluft zwischen Luftrotor und Motorzylinder ist dabei so klein wie möglich. Eine Lagebestimmung des Motorzylinders wird vom Luftrotor selbst übernommen und eine Außenzentrierung, z,B. in einem Gehäuse, führt aufgrund von Maßtoleranzen zur Überbestimmung der Motorzylindereinbaulage.The three sealing lines between air rotor 3 and engine cylinder 2, see the corresponding Sealing webs 46, separate according to supply air from exhaust air. A radial clearance between air rotor and engine cylinder is as small as possible. An orientation of the engine cylinder is taken over by the air rotor itself and an external center, z, B. in a housing, due to dimensional tolerances leads to overdetermination of the engine cylinder installation position.

In Figur 6 ist ein Schnitt analog zur Figur 5 nur durch den Motorzylinder 2 dargestellt. Auf die Beschreibung in Zusammenhang mit den vorangehenden Figuren wird verwiesen.In FIG. 6, a section analogous to FIG. 5 is shown only by the engine cylinder 2. On the Description in connection with the preceding figures is made.

In Figur 6 ist insbesondere erkennbar, wie Mittelsenkrechten 18 der Dreiecksseiten 19, 20, 21 sich in einem Punkt 17 schneiden, der der Drehachse 16 entspricht. Insbesondere im Bereich der entsprechenden Fußpunkte der Mittelsenkrechten 18 sind die Dreiecksseiten auf der Innenseite 22 des Motorzylinder 2 konvex gekrümmt, wobei diese Krümmung insbesondere im Bereich der entsprechenden Dichtstege 46 der Außenkrümmung des Luftrotors 3 entspricht. FIG. 6 shows, in particular, how mid-perpendiculars 18 of the triangle sides 19, 20, 21 intersect at a point 17 which corresponds to the axis of rotation 16. Especially in the The area of the corresponding bases of the mid-perpendiculars 18 are the triangle sides on the inside 22 of the engine cylinder 2 convexly curved, this curvature in particular in the region of the corresponding sealing webs 46 of the outer curvature of the air rotor 3 corresponds.

Die Außenkontur bzw. Außenfläche 27 des Motorzylinders 2 verläuft im Bereich der Dreiecksspitzen 13, 14, 15 und der entsprechenden Kanalkörper 26 gekrümmt entlang einer Kreislinie 28 mit Durchmesser 29, siehe Figur 1.The outer contour or outer surface 27 of the motor cylinder 2 extends in the region of the triangle tips 13, 14, 15 and the corresponding channel body 26 curved along a Circle line 28 with diameter 29, see Figure 1.

In Figur 7 ist ein Schnitt analog zu Figur 5 für eine Rechtsdrehung des Luftrotors 3 dargestellt. Gleiche Teile sind mit gleichen Bezugszeichen versehen und es wird auf die Beschreibung zu Figur 5 verwiesen.FIG. 7 shows a section analogous to FIG. 5 for a clockwise rotation of the air motor 3. The same parts are provided with the same reference numerals and it is on the description refer to Figure 5.

Figur 7 unterscheidet sich von Figur 5 im wesentlichen nur dadurch, dass in den Längsschlitzen 5 Federn 57 zur Druckbeaufschlagung der Lamellen radial nach außen angeordnet sind und dass der hintere Rotordeckel 31 um in etwa 90° gegenüber der Position nach Figur 5 in Gegenuhrzeigerrichtung verdreht ist.FIG. 7 differs from FIG. 5 essentially only in that in the longitudinal slots 5 springs 57 arranged to pressurize the slats radially outward are and that the rear rotor cover 31 at about 90 ° relative to the position of FIG 5 is rotated in the counterclockwise direction.

Im folgenden wird kurz die Funktionsweise des erfindungsgemäßen Dreikammer-Luftmotor 1 anhand der Figuren erläutert.In the following, the operation of the three-chamber air motor according to the invention will be briefly 1 explained with reference to the figures.

In der Stellung nach Figur 5 wird über Lufteinlässe 10, siehe Figur 2, und entsprechend Lufteinlasskanäle 24 mit Schlitzen 44 Druckluft den Kammern 7, 8, 9 zugeführt. Durch die Druckluftbeaufschlagung der den Lufteinlasskanälen 24 nächst benachbarten Lamellen 6 erfolgt eine Drehung des Luftrotors 3 in Drehrichtung 40, siehe Figur 5.In the position of Figure 5 is via air inlets 10, see Figure 2, and accordingly Air inlet ducts 24 with slots 44 compressed air to the chambers 7, 8, 9 supplied. By the Compressed air to the air inlet ducts 24 next adjacent fins 6th there is a rotation of the air motor 3 in the direction of rotation 40, see Figure 5.

Bei Drehung des Luftrotors 3 gerät eine in Drehrichtung nachfolgende Lamelle schließlich mit dem Schlitz 44 in Anlage und wird bei Weiterdrehung durch die über den Schlitz zugeführte Druckluft in Drehrichtung 40 beaufschlagt. Die in Drehrichtung 40 vorgeordnete Lamelle erreicht Auslassvertiefung 36, so dass hinter dieser Lamelle 6 in der entsprechenden Kammer enthaltene Druckluft über die Auslassvertiefung und den entsprechenden Auslassspalt 37 radial nach außen aus dem Luftmotor 1, siehe Figur 1, entweichen kann.Upon rotation of the air motor 3, a blade following in the direction of rotation finally ends up with the slot 44 in Appendix and is on further rotation through the supplied via the slot Compressed air in direction of rotation 40 applied. The upstream in the direction of rotation 40 lamella reaches outlet recess 36, so that behind this slat 6 in the corresponding Chamber contained compressed air through the outlet recess and the corresponding outlet gap 37 radially outward from the air motor 1, see Figure 1, can escape.

Analog erfolgt bei den übrigen Kanalkörpern 26 die Druckluftzufuhr bzw. Druckluftabfuhr.Similarly, in the other channel bodies 26, the compressed air supply or compressed air discharge.

Werden die Lufteinlässe 11, siehe Figur 7, mit den Luftauslasskanälen 25 in Verbindung gebracht, indem der hintere Rotordeckel 31 um in etwa 90° relativ zum Motorzylinder 2 verdreht wird, so wird der Luftauslasskanal zum Lufteinlasskanal und der bisherige Lufteinlasskanal zum mit entsprechender Auslassvertiefung in Verbindung stehenden Luftauslasskanal, wobei die Beaufschlagung der entsprechenden Lamellen durch Druckluft in Richtung umgekehrt zur bisherigen Drehrichtung 40 nach Figur 5 erfolgt. If the air inlets 11, see Figure 7, with the air outlet channels 25 in connection brought by the rear rotor cover 31 is rotated by approximately 90 ° relative to the engine cylinder 2 is, the air outlet duct to the air inlet duct and the previous air intake duct to the air outlet passage communicating with the corresponding exhaust recess, wherein the application of the corresponding slats by compressed air in the opposite direction to the previous direction of rotation 40 takes place according to Figure 5.

Durch den Dreikammer-Luftmotor ergibt sich eine geringere Motordrehzahl als beim Zweikammer-Luftmotor, so dass entsprechende Abluftdrosselmaßnahmen nicht mehr erforderlich sind insbesondere bei nicht abschaltenden Schraubem. Gleichzeitig ist das Beschleunigungsvermögen aufgrund der drei Kammern und der entsprechenden Anzahl von Lamellen sehr gleichmäßig und es ergibt sich eine Drehmomentsteigerung im Vergleich zum Zweikammer-Luftmotor. Durch den weiterhin gleichmäßigen Lauf des Dreikammer-Luftmotor ist ein ölfreier Lauf eher möglich und es ergibt sich eine vorteilhafte Selbstzentrierung des Luftrotors mit reduziertem Schallpegel.Due to the three-chamber air motor results in a lower engine speed than the two-chamber air motor, so that appropriate exhaust throttle measures no longer required are especially for non-disconnecting Schraubem. At the same time is the acceleration capacity due to the three chambers and the corresponding number of fins very even and results in a torque increase compared to the two-chamber air motor. Due to the continued smooth running of the three-chamber air motor an oil-free run rather possible and it results in an advantageous self-centering of the air rotor with reduced sound level.

Claims (34)

  1. An air motor (1), especially for a screwer, comprising an air rotor which is rotatably supported in a motor cylinder (2) and comprises a plurality of longitudinal slits extending in the longitudinal direction (4) of the rotor for radially guiding lamellae (6), the rotor (3) and motor cylinder (2) having formed thereinbetween chambers (7, 8, 9) which can be brought into communication with an air inlet (10, 11) and/or an air outlet (12), the motor cylinder (2) comprising an inner chamber of an essentially triangular cross-section, and one chamber (7, 8, 9) each being formed between air rotor (3) and a triangle tip (13, 14, 15),
    characterized in that on an outside (23) of each triangle side (19, 20, 21) at least one air inlet channel and air outlet channel (24, 25) extend in neighboring relationship with each other in the longitudinal direction (4) of the motor cylinder (2), and the rear and/or front rotor cover (31) is rotatable relative to the motor cylinder (2) for the alternative supply of air to air inlet and air outlet channel (24, 25), air outlets (35) being formed in the front and/or rear rotor cover (31, 32) as partly annular-shaped outlet recesses (12, 36) which are formed in the rotor cover (31, 32) and are open at least towards the motor cylinder (2) and are connectable to air inlet or air outlet channel (24, 25).
  2. The air motor according to claim 1,
    characterized in that the inner chamber of the motor cylinder (2) has the cross section of an isosceles triangle, a rotational axis (16) of the air rotor (3) being arranged in particular at the point of intersection of the three mid-perpendiculars (18) of the triangle sides (19, 20, 21).
  3. The air motor according to claim 1 or 2,
    characterized in that the triangle sides (19, 20, 21) of the motor cylinder (2) are convexly curved at least in the area of the respective mid-perpendiculars (18).
  4. The air motor according to at least one of the preceding claims,
    characterized in that the inner surfaces (22) of the motor cylinder (2) are convexly curved at least in the area of the triangle tips (13, 14, 15).
  5. The air motor according to at least one of the preceding claims,
    characterized in that inner surfaces (22) of the motor cylinder (2) have identical radii of curvature in the area of the triangle tips (13, 14, 15).
  6. The air motor according to at least one of the preceding claims,
    characterized in that air inlet channel and air outlet channel (24, 25) are formed in a channel body (26) of the motor cylinder (2).
  7. The air motor according to at least one of the preceding claims,
    characterized in that the outer surface (27) of the motor cylinder (2) is positioned in the area of triangle tips (13, 14, 15) and channel bodies (26) on a circular line (28).
  8. The air motor according to any one of the preceding claims,
    characterized in that the diameter (29) of the circular line (28) is smaller than a diameter (30) of a front and/or rear rotor cover (31, 32).
  9. The air motor according to at least one of the preceding claims,
    characterized in that the channel body (26) extends between front and rear rotor cover (31, 32).
  10. The air motor according to at least one of the preceding claims,
    characterized in that in the rear rotor cover (31) at least air inlets (10, 11; 33) are formed for supplying air to the air inlet channels (24).
  11. The air motor according to at least one of the preceding claims,
    characterized in that the air inlet (33) is formed as a hole (34) passing through the rear rotor cover (31).
  12. The air motor according to at least one of the preceding claims,
    characterized in that a cross section of the hole (34) has a smaller size than a cross section of the air inlet channel (24).
  13. The air motor according to at least one of the preceding claims,
    characterized in that hole (34) and/or air inlet channel (24) have a circular cross-section.
  14. The air motor according to at least one of the preceding claims,
    characterized in that the rear rotor cover (31) is rotatable relative to the motor cylinder (2) for the alternative supply of air to air inlet channel and air outlet channel (24, 25).
  15. The air motor according to at least one of the preceding claims,
    characterized in that air outlets (35) which are connectable to air inlet or air outlet channel (24, 25) are formed in the front and/or rear rotor cover (31, 32).
  16. The air motor according to at least one of the preceding claims,
    characterized in that the air outlet (35) is designed as a partly annular-shaped outlet recess (12, 36) which is formed in the rotor cover (31, 32) and is open at least towards the motor cylinder (2).
  17. The air motor according to at least one of the preceding claims,
    characterized in that the outlet recess (36) is opened radially outwards via an outlet gap (37).
  18. The air motor according to at least one of the preceding claims,
    characterized in that, when connected to an air outlet channel (25) at one of its ends (38), the outlet recess (36) extends with its other end (39) into an area between a triangle tip (13, 14, 15) and a channel body (26).
  19. The air motor according to at least one of the preceding claims,
    characterized in that the outlet recess (36) communicates with a chamber (7, 8, 9) arranged downstream of the associated air outlet chamber (25) in the rotational direction (40) of the air rotor (3).
  20. The air motor according to at least one of the preceding claims,
    characterized in that an inner radius (41) of the outlet recess (36) is substantially equal to an outer radius (42) of the air rotor (3).
  21. The air motor according to at least one of the preceding claims,
    characterized in that air inlet channel and air outlet channel (24, 25) are provided on the inside (43) of the motor cylinder (2) with slits (44, 45) which extend over part of the respective length thereof and are open towards the air rotor (3) and are separated by a sealing web (46) with which the air rotor (21) is in tight contact.
  22. The air motor according to at least one of the preceding claims,
    characterized in that the air rotor (3) comprises at least seven longitudinal slits (5) with a correspondingly identical number of lamellae (6).
  23. The air motor according to at least one of the preceding claims,
    characterized in that a mid-point angle (49) assigned to the length (47) of the outlet recess (36) in circumferential direction (48) is greater than the angle (50) between two neighboring lamellae (6).
  24. The air motor according to at least one of the preceding claims,
    characterized in that a pressure spring (57) is arranged between two diametrically opposed lamellae (6).
  25. The air motor according to at least one of the preceding claims,
    characterized in that the rear rotor cover (31) comprises compressed-air recesses (59) which are arranged around a center hole (58) and extend in concentric fashion relative to the center hole.
  26. The air motor according to at least one of the preceding claims,
    characterized in that the compressed-air recesses (59) are equidistant relative to one another in the circumferential direction (60) of the center hole (58) and/or are laterally opened towards the center hole.
  27. The air motor according to at least one of the preceding claims,
    characterized in that an air distributing means (61) is arranged for the supply of compressed air to the air inlets (10, 11) of the rear rotor cover (31) at the side thereof that is opposite the air rotor (3).
  28. The air motor according to at least one of the preceding claims,
    characterized in that the air distributing means (61) is disk-shaped and comprises three air-distributing grooves (62) extending radially outwards from a central air supply hole, at the side facing the rear rotor cover.
  29. The air motor according to at least one of the preceding claims,
    characterized in that the air distributing grooves (62) are arranged in circumferential direction at the same distance relative to one another and are assigned to a group of air inlets (10, 11) for compressed-air actuation, depending on the relative position with respect to the rear rotor cover (31).
  30. The air motor according to at least one of the preceding claims,
    characterized in that the air outlets (12) pass through the rear rotor cover (31).
  31. The air motor according to at least one of the preceding claims,
    characterized in that the rear rotor cover (31) is lockably supported in two positions relative to the motor cylinder (1) for the left-hand and right-hand rotation of the air rotor (3).
  32. The air motor according to at least one of the preceding claims,
    characterized in that a switching knob (63) protrudes radially outwards from the rear rotor cover (31).
  33. The air motor according to at least one of the preceding claims,
    characterized in that the air motor comprises a motor housing (64) having arranged therein the rotor cover (31, 32) and motor cylinder (2) with air rotor (3), the motor housing comprising an air supply channel (66) communicating with the air supply hole (65), and a rotor hole (67) which supports the output shaft of the air rotor.
  34. The air motor according to at least one of the preceding claims,
    characterized in that a pin (67) is arranged between front rotor cover (32) and motor cylinder (2) for transmitting a reaction element.
EP01931593A 2000-04-11 2001-04-11 Air motor Expired - Lifetime EP1272737B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20006683U DE20006683U1 (en) 2000-04-11 2000-04-11 Air motor
DE20006683U 2000-04-11
PCT/EP2001/004205 WO2001077497A1 (en) 2000-04-11 2001-04-11 Air motor

Publications (2)

Publication Number Publication Date
EP1272737A1 EP1272737A1 (en) 2003-01-08
EP1272737B1 true EP1272737B1 (en) 2004-01-28

Family

ID=7940123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01931593A Expired - Lifetime EP1272737B1 (en) 2000-04-11 2001-04-11 Air motor

Country Status (6)

Country Link
US (1) US6857864B2 (en)
EP (1) EP1272737B1 (en)
JP (1) JP3730571B2 (en)
AT (1) ATE258646T1 (en)
DE (2) DE20006683U1 (en)
WO (1) WO2001077497A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7939982B2 (en) 2008-10-02 2011-05-10 Nidec Motor Corporation Motor with lobed rotor having uniform and non-uniform air gaps
US9206688B2 (en) * 2013-07-10 2015-12-08 Spx Flow, Inc. High torque rotary motor with multi-lobed ring with inlet and outlet
CN110259518B (en) * 2019-07-17 2024-03-22 顾新钿 Pneumatic motor

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452471A (en) * 1945-05-19 1948-10-26 Eaton Pump Mfg Company Inc Rotary vane pump
US2575524A (en) * 1946-10-10 1951-11-20 Independent Pneumatic Tool Co Rotary tool
GB732394A (en) * 1953-01-19 1955-06-22 Karsten Alfred Ovretveit Improvements in or relating to rotary hydraulic and pneumatic motors and pumps
US3230840A (en) * 1963-05-22 1966-01-25 Elliott F Hanson Fluid operated device
US3381891A (en) * 1966-03-02 1968-05-07 Worthington Corp Multi-chamber rotary vane compressor
US3498186A (en) * 1967-05-19 1970-03-03 Oren Van Northcutt Multiple lobed chamber air motor
DE1902187C3 (en) * 1969-01-17 1978-10-12 Alfred Teves Gmbh, 6000 Frankfurt Rotary piston machine
US3858559A (en) * 1970-12-04 1975-01-07 Jr Albert Raymond Thomas Coupled vane rotary fluid device
DE2125516A1 (en) * 1971-05-22 1972-12-07 Steiner, Eduard; Schmidt, Otto; 2000 Hamburg Rotary piston engine pump
SU632830A1 (en) * 1975-04-28 1978-11-15 Украинский Заочный Политехнический Институт Multiple-action guided-vane rotary machine
EP0052162A1 (en) * 1980-11-19 1982-05-26 Erich Charwat Rotary piston engine with sliding vanes operating with expanding gases
DE3503032C2 (en) * 1985-01-30 1994-04-07 Gardner Denver Gmbh Air motor for pneumatic screwdrivers
FR2762879A1 (en) * 1997-04-30 1998-11-06 Valeo Seiko Compressors Sa Rotary compressor for motor vehicle air-conditioner

Also Published As

Publication number Publication date
DE50101404D1 (en) 2004-03-04
ATE258646T1 (en) 2004-02-15
JP2003530509A (en) 2003-10-14
WO2001077497B1 (en) 2002-02-21
JP3730571B2 (en) 2006-01-05
US20040071579A1 (en) 2004-04-15
EP1272737A1 (en) 2003-01-08
US6857864B2 (en) 2005-02-22
DE20006683U1 (en) 2001-08-16
WO2001077497A1 (en) 2001-10-18

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