CN2041825U - Bipolar shifting yoke of stepper motor - Google Patents

Abstract

The utility model provides a novel device used for transmitting the rotational mechanical energy of the rotor of a bipolar stepper motor. Shifting yokes of two column-shaped rigid yoke arms, which are connected into the integration with the magnetic steel of the rotor are used for directly shifting a second gear, and the rotation that the rotor of the bipolar stepper motor rotates 180 DEG per second is converted into the rotation that a second wheel rotates a tooth per second. As a consequence, the driving device for the clocks is simplified, the volume is reduced, the performance is improved, and the cost is decreased. The device can improve the output efficiency of the mechanical energy of the stepper motor and provide effective path for further miniaturization and thinness of the clocks by a single end support and the magnetic levitation and the reversed rotation self-locking actions of the device self.

Description

Bipolar shifting yoke of stepper motor

The present invention relates to a kind of is the quartz electronic clock of pointer type table of motor transducer with the bipolar stepping motor, particularly be parallel to each other to have two active sections, the shift fork that the cross section is the cylindricality yoke of garden arc is done stepping motor rotor mechanical energy and is spread out of device, can directly drive a second gear one-level transmission, it is thinner littler that the volume of the quartz electronic clock of pointer type table of realization clock and watch motion second indication can be made on its thickness peace area.

The electromechanics of existing quartz electronic clock of pointer type table with the bipolar stepping motor transducing can to spread out of be that another is driven with gear drive that the less number of teeth (being no less than 6 teeth) is arranged.The ratio of gear that the motion per second of bipolar stepping motor 180 ° (π radian) is delivered between 6 ° of the second wheel motion per seconds (π/3 radians) is 30:1, because the restriction of clock and watch physical dimension and existing gear machining technology, must the motion branch two-stage of motor be transferred to second wheel through idle wheel (or claim power wheel), wheel sheet between centers is overlapping at least three layers between its clamping plate, the armature spindle tooth requirement modulus and the number of teeth are littler, make difficulty, limited the development of clock and watch Jiong miniaturization, slimming.

The purpose of this invention is to provide a kind of improved quartz electronic clock of pointer type meter step motor mechanical energy and spread out of device, make the motion of rotor directly pass to second wheel, realize motion indication second of quartz electronic clock of pointer type table, reduce the one-level gear drive, avoid adopting the rotor gear teeth transmission of making difficulty, and the second wheel of contrary transmission self-locking just can prevent from effectively to dial pin without attachment device the time flies to change.When it not only makes the quartz electronic clock of pointer type table manufacture and design, axially level reduces, reduced thickness, plane figure is simplified, area size is dwindled, amount of parts reduces simplified manufacturing process, manufacturing cost reduces, and production efficiency improves, and this device for mechanical transmission efficiency height, driving force is huge, allow to reduce the location torque of stepper motor, under the identical situation of electric power output, the electric motor starting torque is big, the output mechanical power height, improved the functional reliability of clock and watch, the energy reliable movement reduces Overall Power Consumption when circuit output pulse is designed to 5.6mS by the 7.8mS improvement, prolong the battery of battery serviceable life and more small size allowable, the volume of quartz electronic clock of pointer type table is further reduced.

The present invention realizes like this, loading onto its upper axial end of holder on the bipolar stepping motor rotor magnet steel adorns one and has the two active sections xsect that is parallel to each other and be the shift fork of the cylindricality yoke of garden camber, the front end of two yokes and rotor magnetic steel axis are linked with enough strength of connections and rigidity with holder symmetrically, the distance of two yokes is the circular pitch of the gear that is driven, the radially full-size of its cylindricality yoke is less than this garden, gear tooth slot bottom arc dia, constitute stepper motor bipolarity rotor part, the second wheel sheet is the gear of 60 teeth, place the center of clock and watch, the distance at stepping motor rotor axle center to second wheel center is less than second wheel sheet tooth top radius and make the shift fork yoke and second wheel sheet gullet base has enough big radial play, armature spindle is fixed on the bottom plate has definite position relation with stator, having dual rotor packs on the armature spindle, its pole orientation is positioned, and torque is positioned magnetic circuit and air gap forms the maximum magnetic flux position of energy altogether, when the direction of shift fork two arms and the angle of rotor magnetic pole make the rotor location, two arm directions are vertical with second wheel axle link direction with armature spindle, rotor axially is suspended on the armature spindle under its magnetic field and stator effect simultaneously, be positioned to form maximum magnetic flux and be taken in the circuit pulse per second (PPS) function of current in stepper motor in the position of energy altogether with stator magnetic circuit, the cylindricality yoke that makes rotor turn over 180 ° of (π radian) its shift forks is stirred second wheel, and to turn over a tooth be 6 ° (π/30 radians), current impulse rotor is later located under the static torque effect of magnetic field, two yokes are positioned at aforementioned location, its physical dimension makes the self-locking of second wheel de-rotation, at this moment positive drive is rested, the yoke of location, rotor field shift fork makes second wheel can not break away from rotor and moves voluntarily, and contrary transmission self-locking, whole clockwork is in the stage of resting, next inverted pulse repeats above motion and intermittence, thereby finish batch (-type) indication second that the Second hand for clock and watch per second changes 6 ° (π/30 radians), because rotor magnetic suspends, there is not axial mechanical friction, and axial magnetic altogether can be maximum, mechanical output efficiency is improved, second wheel transmits to the motion of minute wheel and adopts common third wheel to spread out of friction minute wheel chip architecture, complete machine only needs two clamping plates (bottom plate and train wheel bridge) because the special drive characteristic of this device and its contrary transmission auto-lock function, make stepper motor design earlier with less location torque and less than the burst pulse driving (the wide 5.6ms of pulse) of 7.8ms thus battery can with minimum volume make clock and watch have sufficiently long continuity to walk the time, the volume of quartz electronic clock of pointer type table is further reduced.Accompanying drawing the 1,2, the 3rd, one embodiment is so that explanation.

Accompanying drawing one is the axial synoptic diagram of transmission major part of the present invention: 1, stepper motor stator; 2, rotor magnetic steel; 3, shift fork; 4, second wheel parts; 5, train wheel bridge; 6, cross wheel component; 7, friction minute wheel sheet; 8, bottom plate; 9, armature spindle; 10, holder, its transmission principle, rotor drive μ type shift fork and stir the second wheel parts, pass to wheel component by the second wheel parts, pass to friction branch wheel component by crossing wheel component, by minute wheel, reach the timing purpose then.

Accompanying drawing two is axial section view two yoke work parallel columns comparatively of rotor structure one example.

Accompanying drawing three is shift fork arm and second wheel tooth transmission plane relation figure B ₁Be rotor (2) axle center, B ₂Be second wheel (4) axle center, P ₁P ₂Be the center in two arm cross sections of shift fork (3), the cross section contour working portion is the garden arc.

Claims (4)

1, with shift fork [3] the stepping motor rotor rotary machine can be spread out of the device of driven wheel with two yokes, it is characterized in that: the device that spreads out of of bipolar stepping motor rotor rotary machine energy is two yokes that form the shift fork [3] of a component body with rotor, this shift fork is made up of two cylindricality rigidity yokes, and two cylindricality yokes replace the gear teeth of handsetting gear.

2, by the device of claim 1 regulation, it is characterized in that: (3) two cylindricality yokes of shift fork be by an active section cross sectional shape with garden arc or other odd-shaped cross section cylindrical material be bent to form combine as a whole or two have independently cylinder of above-mentioned cross sectional shape.

3, by claim 1 and 2 device specifies, it is characterized in that: the front end of shift fork (3) two cylindricality yokes joins the formation stepping motor rotor together by a holder (10) and rotor magnetic steel (2).

4, press the supporting of the rotor part of claim 3 regulation, it is characterized in that: rotor part has an end-journal and inserts support and forms single-ended supporting, borrows stable axle that magnetic suspension effect between rotor magnetic steel and the stator keeps rotor part, neck to the working position simultaneously.

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