EP0058770A1 - Moteur à palettes pour deux sens de rotation - Google Patents

Moteur à palettes pour deux sens de rotation Download PDF

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Publication number
EP0058770A1
EP0058770A1 EP81109867A EP81109867A EP0058770A1 EP 0058770 A1 EP0058770 A1 EP 0058770A1 EP 81109867 A EP81109867 A EP 81109867A EP 81109867 A EP81109867 A EP 81109867A EP 0058770 A1 EP0058770 A1 EP 0058770A1
Authority
EP
European Patent Office
Prior art keywords
air
housing
sleeve
vane motor
motor according
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.)
Withdrawn
Application number
EP81109867A
Other languages
German (de)
English (en)
Inventor
Alfred Hettich
Heinz Keller
Wilhelm Schwarze
Reinhold Stroezel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0058770A1 publication Critical patent/EP0058770A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
    • F01C20/04—Control of, monitoring of, or safety arrangements for, machines or engines specially adapted for reversible machines or engines

Definitions

  • the invention is based on a vane motor according to the type of the main claim.
  • vane-type motors are known, for example, from DE-OS 1 941 781. With these vane-type motors designed for right-hand and left-hand rotation, it is disadvantageous that they work with a poorer efficiency than pure right-hand rotation motors. As a result of the premature pressure medium outlet, these motors also make a much higher running noise than clockwise motors.
  • the vane motor according to the invention with the characterizing features of the main claim has the advantage that an equally good efficiency and equally low noise development for both selectable running directions As is achieved with pure clockwise rotation motors of this type, this task is solved by alternately opening optimally coordinated groups of air inlet and air outlet openings, one of which is designed for clockwise rotation and the other for counterclockwise rotation.
  • the measures listed in the subclaims permit advantageous developments and improvements of the vane motor specified in the main claim. It is particularly advantageous to construct the stator of this vane motor from two mutually movable parts which have air inlet and air outlet openings which correspond in a certain relative position to one another in the right-hand rotation group and in another specific relative position to one another in the left-hand rotation group .
  • the stator may this from a housing-fixed sleeve and a be formed in this rotatable within limits adjusting ".
  • a particularly advantageous design for the remote control of right-hand and left-hand rotation can be seen in the fact that the fixed sleeve has open caverns to the adjusting sleeve and to one of their air inlets, into which wings connected to the adjusting sleeve engage, that the caverns are longer than the adjustment path for the adjusting sleeve plus the thickness of the wings projecting into the caverns, and that the end position of the adjusting sleeve, which is determined by a stop between one of the wings and a boundary surface of its cavern facing away from the air inlet, between the inlet-side end of the other cavern and the other cavern in it engaging wing leaves a space for the inflow of air.
  • the vane motor can only be switched from clockwise to counterclockwise rotation and vice versa by directing the supply air to one or the other of the inlet openings.
  • FIG. 1 shows a longitudinal section through a screwdriver operated with a vane motor in the area of the air supply and the vane motor
  • FIG. 2 shows a section 2-2 to FIG. 1
  • FIG. 3 shows a longitudinal section through a housing-fixed sleeve with air inlet
  • Fig. 4 shows a cross-section AA to Fig. 3
  • Fig. 5 shows a cross-section CC to Fig. 3
  • Fig. 6 shows a cross-section BB to Fig. 3
  • Fig. 7 shows a development to Fig. 3, with a view of the inner surface of the sleeve fixed to the housing
  • FIG. 1 shows a longitudinal section through a screwdriver operated with a vane motor in the area of the air supply and the vane motor
  • FIG. 2 shows a section 2-2 to FIG. 1
  • FIG. 3 shows a longitudinal section through a housing-fixed sleeve with air inlet
  • Fig. 4 shows a cross-section AA to
  • FIG. 8 a longitudinal section through an adjusting sleeve
  • FIG. 9 a cross section AA to FIG. 8
  • FIG. 10 a cross section CC to FIG. 8,
  • FIG. 11 a Cross-section BB to FIG. 8,
  • FIG. 12 a development to FIG. 8, with a view of the inner surface of the adjusting sleeve
  • FIG. 13 a cross-section corresponding to FIG. 2 to an embodiment with an air-controlled change in direction of rotation.
  • a pneumatic screwdriver 1 has a handle housing 2, which is screwed into a motor housing 3.
  • the handle housing 2 receives a fastening nut 4 for an air supply hose in front of an air supply duct 5. It also forms an exhaust air duct 6, which is connected to the outlet openings of this motor via corresponding cavities in the motor housing 3.
  • an inlet valve 7 with a ball 8, a nozzle 9 and a compression spring 10 is arranged in the air supply duct 5.
  • a bolt 11 is guided in a bushing 12 perpendicular to the longitudinal axis of the handle housing 2 and the motor housing 3 and lies laterally against the ball 8 within the handle housing 2.
  • the end face of the bolt 11 protruding from the handle housing 2 lies against the surface of a pivot button 13 facing this handle housing 2, which pivotally supports a pin 14 transversely to the longitudinal axis of the handle housing 2.
  • a stop surface 15 of the pivot button 13 abuts a collar 16 of the handle housing 2.
  • the air supply duct 5 is divided into two ducts 18 and 19.
  • these ducts in FIG. 1 are partially shifted into the sectional plane. They lead to air inlet openings 20 and 21 and run within a two-part bearing body 22.
  • the inner cylinder of this housing-fixed sleeve 32, which receives the adjusting sleeve 31, is e eccentric to the outer surface of the housing-fixed sleeve 32.
  • the longitudinal axis of the adjusting sleeve 31 is a from the longitudinal axis of the motor housing 3 and thus also the rotor 28 is shifted out.
  • the housing-fixed sleeve 32 is slightly longer than the adjusting sleeve 31 and axially clamped between the bearing bodies 22 and 24.
  • a pin 33 extending from the bearing body 22 to the bearing body 24 passes through a slot 34 in the housing-fixed sleeve 32 and thus secures it against rotation in the motor housing 3
  • Extensions 35 and 36 on the circumference of the housing-fixed sleeve 32 form the air inlet openings 20 and 21 of the housing-fixed sleeve 32.
  • a circumferential slot 37 in the housing-fixed sleeve 32 is penetrated by a driver 38, the inner end of which
  • a congruent slot 39 is provided in the motor housing 3.
  • the driver 38 finally engages in a bore 40 of an adjusting ring 41, which at this point encloses the motor housing 3 and covers the slots 37 and 39.
  • the adjusting ring 41 slides on the lateral surface of the motor housing 3 by means of sealing rings 42.
  • the housing-fixed sleeve 32 has, in addition to the air inlet openings 20 and 21, two groups of air outlet openings 43 and 44.
  • 43 denotes the group of air outlet openings which is effective when the rotor 28 rotates clockwise, together with the air inlet opening 21. Accordingly, the group of air outlet openings is the one with Designated 44 is effective for counterclockwise rotation of the rotor 28 together with the air inlet opening 20.
  • the adjusting sleeve 31 there are air outlet bores, of which two groups of four 45 are assigned air outlet openings 43, two groups of four 46 air outlet openings 44. The distance between these groups of four 45 and 46 is chosen so that only one can be congruent with the group of air outlet openings 43 and 44 assigned to them.
  • Two groups of three 47 of air outlet bores in the adjusting sleeve 31 can be assigned air outlet openings 43 for the clockwise rotation of the rotor 28 as well as air outlet openings 44 in the sleeve 32 fixed to the housing for the counterclockwise rotation of the rotor 28.
  • an air inlet opening 48 in the adjusting sleeve 31 can optionally be assigned to one of the air inlet openings 20 or 21 in the sleeve 32 fixed to the housing.
  • a threaded bore 49 in the adjusting sleeve 31 can receive a corresponding threaded pin of the driver 38.
  • the driver 38 bears against the left end of the slots 37 and 39.
  • the adjusting sleeve 31 coincides with its air inlet opening 48 with the air inlet opening 21 in the housing-fixed sleeve 32.
  • the outlet bores 45 and 47 of the adjusting sleeve 31 with the air outlet openings 43 of the housing-fixed sleeve 32.
  • the prestressed air entering the interior of the adjusting sleeve 31 through the air inlet openings 21 and 48 fills the chamber between the inner wall of the sleeve, the jacket of the rotor 28, two adjacent vanes 30 and the inwardly directed end faces of the bearing bodies 22 and 24.
  • the rotor 28 is thus driven for clockwise rotation in the known manner.
  • the compressed air has relaxed between two wings 30 when the largest chamber volume has been reached, it begins to emerge through the air outlet openings 43, 45 and 47.
  • the rotor 28 is moved clockwise with the best possible efficiency.
  • the adjusting ring 41 must be rotated into its opposite stop position, clockwise in the illustration according to FIG. 2.
  • the driver 38 bears against the opposite end of the slots 37 and 39
  • the air inlet opening 20 in the housing-fixed sleeve 32 and the air inlet opening 48 in the adjusting sleeve 31 coincide.
  • the air inlet opening 21 is closed by the wall of the adjusting sleeve 31.
  • the air outlet openings 44 are now released because the air outlet bores 46 and 47 in the adjusting sleeve 31 match them.
  • the air outlet openings 43 in the sleeve 32 fixed to the housing are closed by the wall of the adjusting sleeve 31.
  • the compressed air injected through the air supply duct 5 can now enter the chambers on the rotor 28 through the air inlet openings 20 and 48.
  • Vane-cell motors designed only for one direction of rotation cannot achieve better efficiency.
  • a housing-fixed sleeve 50 has two inwardly open caverns 51 and 52.
  • the channel 19 opens into the cavern 51, and the channel 18 in the bearing body 22 into the cavern 52. These openings are placed at the mutually facing ends of the caverns 51 and 52.
  • their cross-sections are engaged by wings 53 and 54, respectively, which are firmly connected to an adjusting sleeve 55.
  • the fixed wings 53 and 54 can also be provided as loose rollers arranged axially parallel to the adjusting sleeve 55, which are not shown here are shown and described. Some of these rollers would then have to engage in a groove in the adjusting sleeve 55, and the rest would touch the outer wall of the caverns 51 and 52. With this type of arrangement, the roller also seals when switching.
  • the slots 37 and 39 and the driver 38 are omitted in this embodiment.
  • the collar 41 is also superfluous.
  • the length of the circumferential caverns 51 and 52 and their position relative to each other and to the wings 53 and 54 is chosen so that both air inlet openings for the channels 18 and 19 remain open in each position of the adjusting sleeve 55.
  • the adjusting sleeve 55 has two air inlet openings 56 and 57.
  • this is not mandatory because a construction would also be conceivable in which a single air inlet opening is used.
  • channels 18 and 19 are connected in a known manner, e.g. via a reversing valve, alternately supplied with compressed air.
  • the vane motor is open Clockwise rotation set.
  • the air flowing in through the channel 19 'urges the air vane 53 in its stop position at the end of the cavity 51.
  • the compressed air flows into the working chamber. It is omitted in the manner already described in the first embodiment.
  • the duct 19 is separated from the air supply and the duct 18 is pressurized with compressed air.
  • the compressed air flowing into the cavern 52 urges the wing 54 to its stop position at the other end of the cavern 52 until the air inlet opening 57 also comes into the area of the cavern 52.
  • the remaining rotation of the adjusting sleeve 55 is caused by both the wing 54 and the wing 30 of the rotor 28. Both the wing 54 and the wing 30 move in the changeover direction. When the wing 54 reaches its stop position at the end of the chamber 52, the air inlet opening 57 is also fully open. The air pressure and the friction of the wings 30 on the inner wall of the adjusting sleeve 55 hold the wing 54 in its stop position. The direction of rotation of the rotor 28 is only reversed when the compressed air is reversed from the duct 18 to the duct 19. The adjusting sleeve 55 creates the most favorable working conditions for the selected direction of rotation through the air-controlled rotary movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP81109867A 1981-02-19 1981-11-25 Moteur à palettes pour deux sens de rotation Withdrawn EP0058770A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813106028 DE3106028A1 (de) 1981-02-19 1981-02-19 Fluegelzellenmotor fuer rechts- links-lauf
DE3106028 1981-02-19

Publications (1)

Publication Number Publication Date
EP0058770A1 true EP0058770A1 (fr) 1982-09-01

Family

ID=6125195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109867A Withdrawn EP0058770A1 (fr) 1981-02-19 1981-11-25 Moteur à palettes pour deux sens de rotation

Country Status (3)

Country Link
EP (1) EP0058770A1 (fr)
JP (1) JPS57153987A (fr)
DE (1) DE3106028A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2378062A1 (fr) * 2009-01-08 2011-10-19 Nitto Kohki Co., Ltd. Moteur pneumatique du type à palettes
CN111764966A (zh) * 2019-04-01 2020-10-13 陈文彬 流体控制装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5394800B2 (ja) * 2009-04-08 2014-01-22 オイレス工業株式会社 ベーン式回転装置
DE102015114827B3 (de) * 2015-09-04 2016-09-15 Gilbert Haf Druckluft-Flügelzellenmotor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR808041A (fr) * 1936-07-07 1937-01-27 Renault Georges Ets Appareil rotatif pneumatique ou hydraulique reversible
US2257892A (en) * 1939-02-23 1941-10-07 Cleveland Pneumatic Tool Co Reversible rotary motor
US2980078A (en) * 1957-04-01 1961-04-18 Master Power Corp Reversing pneumatic motor
GB922742A (en) * 1959-11-13 1963-04-03 Briggs Bros Engineers Ltd Improvements in compressed air motors
GB1107103A (en) * 1964-11-05 1968-03-20 Heinz Teves Improvements in or relating to rotary vane pumps
US3397598A (en) * 1966-11-07 1968-08-20 Ambrose E. Zierick Reversible hydraulic transmission
DE2448469A1 (de) * 1974-10-11 1976-04-22 Sartoros Theodore Dipl Ing Stufenlos regelbare doppeltwirkende fluegelzellenpumpe u/o fluegelzellenmotor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR808041A (fr) * 1936-07-07 1937-01-27 Renault Georges Ets Appareil rotatif pneumatique ou hydraulique reversible
US2257892A (en) * 1939-02-23 1941-10-07 Cleveland Pneumatic Tool Co Reversible rotary motor
US2980078A (en) * 1957-04-01 1961-04-18 Master Power Corp Reversing pneumatic motor
GB922742A (en) * 1959-11-13 1963-04-03 Briggs Bros Engineers Ltd Improvements in compressed air motors
GB1107103A (en) * 1964-11-05 1968-03-20 Heinz Teves Improvements in or relating to rotary vane pumps
US3397598A (en) * 1966-11-07 1968-08-20 Ambrose E. Zierick Reversible hydraulic transmission
DE2448469A1 (de) * 1974-10-11 1976-04-22 Sartoros Theodore Dipl Ing Stufenlos regelbare doppeltwirkende fluegelzellenpumpe u/o fluegelzellenmotor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2378062A1 (fr) * 2009-01-08 2011-10-19 Nitto Kohki Co., Ltd. Moteur pneumatique du type à palettes
EP2378062A4 (fr) * 2009-01-08 2016-06-08 Nitto Kohki Co Moteur pneumatique du type à palettes
CN111764966A (zh) * 2019-04-01 2020-10-13 陈文彬 流体控制装置
CN111764966B (zh) * 2019-04-01 2021-05-04 陈文彬 流体控制装置

Also Published As

Publication number Publication date
JPS57153987A (en) 1982-09-22
DE3106028A1 (de) 1982-09-02

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19811125

AK Designated contracting states

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18W Application withdrawn

Withdrawal date: 19821008

RIN1 Information on inventor provided before grant (corrected)

Inventor name: STROEZEL, REINHOLD

Inventor name: KELLER, HEINZ

Inventor name: HETTICH, ALFRED

Inventor name: SCHWARZE, WILHELM