EP0152144A2 - Système d'entraînement oscillatoire pour petit appareil à moteur synchrone monophase - Google Patents

Système d'entraînement oscillatoire pour petit appareil à moteur synchrone monophase Download PDF

Info

Publication number
EP0152144A2
EP0152144A2 EP85200139A EP85200139A EP0152144A2 EP 0152144 A2 EP0152144 A2 EP 0152144A2 EP 85200139 A EP85200139 A EP 85200139A EP 85200139 A EP85200139 A EP 85200139A EP 0152144 A2 EP0152144 A2 EP 0152144A2
Authority
EP
European Patent Office
Prior art keywords
cam
angle
lever
stator
pressure roller
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.)
Granted
Application number
EP85200139A
Other languages
German (de)
English (en)
Other versions
EP0152144A3 (en
EP0152144B1 (fr
Inventor
Gerhard Diefenbach
Hugo Dr. Schemmann
Romuald Leander Bukoschek
Frans Ir. V. Beukering
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Priority to AT85200139T priority Critical patent/ATE43093T1/de
Publication of EP0152144A2 publication Critical patent/EP0152144A2/fr
Publication of EP0152144A3 publication Critical patent/EP0152144A3/de
Application granted granted Critical
Publication of EP0152144B1 publication Critical patent/EP0152144B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • B26B19/282—Motors without a rotating central drive shaft, e.g. linear motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18288—Cam and lever

Definitions

  • the invention relates to a vibration device, in particular a small household appliance, such as a dry shaver, which is driven by means of a single-phase synchronous motor, the shaft of which carries at least one cam, on which spring pressure means act.
  • a vibration device in particular a small household appliance, such as a dry shaver, which is driven by means of a single-phase synchronous motor, the shaft of which carries at least one cam, on which spring pressure means act.
  • EP-OS 45 107 It is also known from EP-OS 45 107 (description of FIG. 4) to use springs in this arrangement in order to design and coordinate an oscillating system consisting of the knife and the springs.
  • these springs are not used to rotate the rotor from a parallel position and thus do not constitute a start-up aid in the case of high friction loads.
  • Claim 1 of this EP-OS specifically requires that the knife be in one of the maximum deflected positions when the rotor is parallel. In these positions, the springs cannot exert a twisting moment on the rotor because the line of action of the spring force runs through the contact point of the cam and roller and through the rotor axis.
  • the springs are not primarily used to maintain contact between the grooves and the roller. Rather, contact is maintained by clamping two cams between two rollers.
  • a drive system is also known from FIG. 5 of EP-OS 45 107, a cam driving a vibrating lever.
  • FIG. 5 of EP-OS 45 107 a cam driving a vibrating lever.
  • a pressure roller is provided on a lever which is mounted on a pivot bearing and which sets a vibrating part to be driven in vibration, which scans the contour of the cam, and that a pressure spring against the lever with the pressure roller acts, which presses the pressure roller in the direction of the cam.
  • a pressure roller is mounted on a first lever arm of an at least double-armed lever that can be pivoted between the arms about a pivot bearing, that a second lever arm enclosing an angle £ with the first lever arm sets a vibrating part to be driven in vibration and that a pressure spring acts against the lever arm with the pressure roller and presses the pressure roller in the direction of the cam.
  • Such a transmission device is easy to create and reliable.
  • the connecting line of the pressure roller axis and pivot bearing and the center line of the second lever arm enclose an angle E of approx. 140 0 with each other, the break point coinciding with the center of the pivot bearing, and that the direction of action of the pressure spring runs through the shaft of the single-phase synchronous motor when the lever is in the center, which then simultaneously perpendicular to the connecting line of the pivot axis and Roller axis stands.
  • this construction leads to a flat, narrow and not too long device.
  • the device is simple and therefore economical to manufacture.
  • the pressure spring rotates the rotor in the de-energized motor state from the parallel position, in which the rotor field and stator field are parallel, in the positive direction of rotation, that is to say clockwise.
  • the oscillation frequency of the knife is twice as high as the rotation frequency of the motor.
  • the cam has a 180 ° symmetry, and the vibration amplitude depends on half the difference in the length of the longer cam axis and the shorter cam axis.
  • the angle beta between the axis of magnetization of the rotor and the longer cam centerline about 40 to 70 0, preferably 60 °. This leads to a smooth run and roughly the same running noise in both directions of rotation. The device starts up reliably.
  • Another advantage is that the pressure spring supports start-up with higher friction values, because the adhesive torque and spring torque work together in the same direction in parallel. The device starts reliably.
  • the spring line of action is approximately perpendicular to the connecting line of the contact roller axis and pivot bearing when the lever is in the middle position.
  • a contact roller 13 presses against the cam 7 and is mounted in a double-armed lever 15 in a roller bearing 19.
  • the double-armed lever 15 has two lever arms 16 and 17 which between a common pivot bearing 18 rule's two lever arms 16 and 17 are pivotable.
  • the pressure roller 13 is mounted in the lever arm 16 by means of a roller axis 19.
  • the lever arms 16 and 17 are rigidly connected to one another, and the center line 37 and the connecting line 36 between the roller bearing 19 and the pivot bearing 18 form an angle ⁇ of approximately 140 ° with one another.
  • a pressure spring 21 presses against the lever arm 16, the pretensioning of which can be adjusted with the aid of an adjusting screw 23.
  • the center line 35 of the pressure spring 21 runs through the motor shaft 5 when the lever 15 is in the center position and perpendicular to the connecting line 36 of the pivot bearing 18 and the roller axis 19.
  • the angle ⁇ between the center lines 35 and 37 is approximately 50 °.
  • the lever arm 17 is provided with a driver 25, which is encompassed by grippers 27 of a lower knife 8.
  • the lower knife 8 is displaceable in the direction of a double arrow 33 with the aid of indicated bearings 31.
  • the pressure roller 13 is pressed with its surface 32 against the surface 9 of the cam 7.
  • the pressing force is dimensioned such that on the one hand the pressing roller 13 cannot lift off the cam 7 at any time, but on the other hand the pressing force does not become so great that the rotating movement of the rotor is impaired.
  • the rotational coordinate of the rotor 4 is indicated by an angle 0. This should be zero if no torque is exerted on the rotor 4 by the stator field.
  • the line 38 is then also pivoted in the positive direction of rotation.
  • a magnetic reluctance torque acts on the rotor 4 even in the case of de-energized stator coils, hereinafter referred to as the adhesive torque.
  • the asymmetry angle ⁇ is dependent on the configuration of the pole arcs and the air gap 39 between the stator 40 and rotor 4 and on the geometric and magnetic rotor data and is ultimately also influenced by the other stator conditions; it should be larger than about 50 , but can also be considerably larger, up to 45 °. A value of around 22 ° is preferably selected. The angle could only be small or even zero if the friction values that act on the rotor are very small or if additional mechanical, magnetic or electrical starting aids are provided.
  • the frictional torque acting on the motor shaft 5 has a minimum in such motion converters at the moment in which the movement of the knife reverses, that is to say in the maximally deflected state of the lower knife 8, regardless of whether the deflection is positive or negative.
  • the cam longitudinal axis 41 falls at the moment of reversal of movement, as can be seen from the slight pivoting movement of the spring action line when the lever 15 is pivoted from the central position, together with the spring action line 35 or is perpendicular to it. In these positions, however, the torque exerted by the pressure spring 21 on the cam 7 is zero.
  • a stand has proven to be particularly favorable in which the lower knife 8 has just passed the end position and thus the minimum friction, but the friction is still small when the rotor comes to the parallel stand rotating in the positive direction.
  • the adhesive torque and the spring torque then turn the rotor out of the parallel position in a positive direction.
  • the lower knife position x is sinusoidal dependent on the double cam angle 2 ⁇ , namely From the zero position shown in FIG. 1, the lower knife moves to the right when the rotor 4 is rotating in the positive direction.
  • the angle ⁇ must lie between the following limits The angle ⁇ should preferably be as small as possible within these limits. If the adhesive torque is sufficient for starting with low friction values, then should be.
  • Fig. 2 shows a one-armed lever drive for a vibration device with a contact roller scanning a cam.
  • a synchronous motor 103 with its permanently magnetic rotor 104 is fastened to an assembly part 101 of a dry shaving apparatus.
  • a cam 107 is arranged on the drive shaft 105, which has a contour 109 such that the lower knife 108 of the vibrating device experiences a sinusoidal deflection depending on the angle of rotation of the cam 107 when the cam 107 rotates.
  • the longer center line of the cam 107 is designated 141.
  • a contact roller 113 presses against the cam 107 and is mounted in a single-arm lever 115 in a roller bearing 119.
  • the one-armed lever 115 can be pivoted about a pivot bearing 118.
  • the connecting line C between the roller bearing 119 and the drive shaft 105 forms an angle o of 50 ° with the lever center line 137 in the middle position of the lever.
  • a pressure spring 121 presses against the lever 115, the pretension of which can be adjusted with the aid of an adjusting screw 123.
  • the center line 135 of the pressure spring 121 runs perpendicular to the center line 137 of the lever 115 when the lever 115 is in the center position.
  • a driver 125 of the lever 115 is surrounded by grippers 127 of the lower knife 108.
  • the lower knife 108 can be displaced in the direction of a double arrow 133 with the aid of indicated bearings 131.
  • the pressure roller 113 is pressed with its surface 132 against the surface 109 of the cam 107.
  • the pressing force is such that, on the one hand, the pressure roller 113 cannot lift off the cam 107 at any time, but on the other hand the The pressing force does not become so great that the orbital movement of the rotor 104 is impaired.
  • the rotational coordinate of the rotor 105 is indicated by an angle 0. This should be zero if no torque is exerted on the rotor 104 by the stator field.
  • a magnetic reluctance torque acts on the rotor 104 even when the stator coils are de-energized.
  • the asymmetry angle ⁇ is again dependent on the configuration of the pole arcs and the air gap 139 between the stator 140 and the rotor 104; 1, as in the exemplary embodiment according to FIG. 1, it should be greater than approximately 50 , although variations according to the parameters of the angle ⁇ according to FIG. 1 are possible.
  • the frictional torque acting on the motor shaft 105 also has this. Fall a minimum at the moment when the movement of the knife reverses, that is, in the maximally deflected state of the lower knife 108, regardless of whether the deflection is positive or negative.
  • the spring action line 135 is perpendicular to the lever center line 137, except for slight pivoting movements of the spring action line when the lever 115 is pivoted from the center position.
  • a cam stand has proven to be particularly favorable, in which the lower knife 108 has just passed the end position and thus the friction minimum, but the friction is still small when the rotor comes to the parallel stand rotating in the positive direction. In the parallel connection, the adhesive torque and the spring torque then turn the rotor out of the parallel position in a positive direction.
  • cam contours are obtained which no longer have 180 ° symmetry, but whose symmetry is determined by the multiplication factor.
  • a semi-axis must then be selected analogously to the above, instead of the longitudinal axis of the cam, which is no longer defined here, the length of which is maximum and which accordingly brings the knife into extreme deflection.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP85200139A 1984-02-08 1985-02-07 Système d'entraînement oscillatoire pour petit appareil à moteur synchrone monophase Expired EP0152144B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85200139T ATE43093T1 (de) 1984-02-08 1985-02-07 Vorrichtung fuer ein vibrationsgeraet, das mittels eines einphasensynchronmotors angetrieben wird.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3404297A DE3404297C2 (de) 1984-02-08 1984-02-08 Vorrichtung zum Antreiben eines Vibrationsteiles, insbesondere eines kleinen Haushaltsgerätes
DE3404297 1984-02-08

Publications (3)

Publication Number Publication Date
EP0152144A2 true EP0152144A2 (fr) 1985-08-21
EP0152144A3 EP0152144A3 (en) 1986-05-14
EP0152144B1 EP0152144B1 (fr) 1989-05-17

Family

ID=6227032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200139A Expired EP0152144B1 (fr) 1984-02-08 1985-02-07 Système d'entraînement oscillatoire pour petit appareil à moteur synchrone monophase

Country Status (6)

Country Link
US (1) US4868435A (fr)
EP (1) EP0152144B1 (fr)
JP (1) JPS60185581A (fr)
AT (1) ATE43093T1 (fr)
CA (1) CA1246845A (fr)
DE (2) DE3404297C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610770A1 (de) * 1985-08-06 1987-02-19 Philips Patentverwaltung Antriebsvorrichtung fuer ein haushalts-vibrationsgeraet
DE3528115C1 (en) * 1985-08-06 1987-03-12 Philips Patentverwaltung Device for a domestic vibration apparatus which is driven by means of a single-phase synchronous motor
DE3610771C1 (de) * 1986-03-29 1987-09-03 Philips Patentverwaltung Vorrichtung zur Gleichlaufverbesserung der Umlaufbewegung des Rotors eines Einphasensynchronmotors
DE3822332A1 (de) * 1988-07-01 1990-01-04 Philips Patentverwaltung Haushaltsvibrationsgeraet
NL9100439A (nl) * 1991-03-12 1992-10-01 Philips Nv Scheerapparaat.
CN101562367B (zh) * 2009-05-31 2012-05-09 重庆钢铁(集团)有限责任公司 轧辊电机总成
US20160226364A1 (en) * 2015-01-30 2016-08-04 Sunbeam Products, Inc. Electric Hair Clipper/Trimmer

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US547860A (en) * 1895-10-15 iiiii
DE153176C (fr) *
GB267291A (en) * 1926-02-17 1927-03-17 William Rose Improvements in or relating to cam-operated mechanism
DE619782C (de) * 1934-12-18 1935-10-07 Hartmann & Braun Akt Ges Einrichtung zur Herstellung von Kurvenscheiben fuer die selbsttaetige Steuerung von Vorgaengen, z. B. an Reglern
CH214955A (fr) * 1940-07-04 1941-05-31 Bechler Andre Levier de transmission de mouvement pour machine-outil automatique.
US2509868A (en) * 1948-10-29 1950-05-30 Remington Rand Inc Dry shaver motor
FR1168340A (fr) * 1955-12-13 1958-12-05 Nsu Werke Ag Dispositif de commande d'arbre à cames par bielles
NL6704472A (fr) * 1967-03-29 1968-09-30
US3699281A (en) * 1971-09-07 1972-10-17 Deltrol Corp Manual preset interval timer with latch holding means for contacts
US3840760A (en) * 1971-10-14 1974-10-08 Philips Corp Electric vibrator motor
NL7404656A (nl) * 1974-04-05 1975-10-07 Philips Nv Inrichting omvattende een synchroonmotor.
NL7907587A (nl) * 1979-10-12 1981-04-14 Coop Landbouw Aan Verkoop Zeefinrichting voor het scheiden van een mengsel van deeltjesvormig materiaal in componenten van verschillende grootte.
AT385936B (de) * 1980-07-28 1988-06-10 Philips Nv Trockenrasierapparat
DE3610770A1 (de) * 1985-08-06 1987-02-19 Philips Patentverwaltung Antriebsvorrichtung fuer ein haushalts-vibrationsgeraet
DE3610772C1 (de) * 1986-03-29 1987-06-04 Philips Patentverwaltung Kleines Haushaltsgeraet,das mittels eines Einphasensynchronmotors angetrieben ist

Also Published As

Publication number Publication date
EP0152144A3 (en) 1986-05-14
US4868435A (en) 1989-09-19
DE3570204D1 (en) 1989-06-22
ATE43093T1 (de) 1989-06-15
DE3404297C2 (de) 1986-04-17
DE3404297A1 (de) 1985-08-08
EP0152144B1 (fr) 1989-05-17
JPS60185581A (ja) 1985-09-21
CA1246845A (fr) 1988-12-20

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