CN1022059C

CN1022059C - Oscillation angle adjuster for electric fan

Info

Publication number: CN1022059C
Application number: CN 89100824
Authority: CN
Inventors: 李振刚; 李振强
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-02-16
Filing date: 1989-02-16
Publication date: 1993-09-08
Anticipated expiration: 2004-02-16
Also published as: CN1044975A

Abstract

The present invention relates to an oscillation angle adjusting device for an electric fan, which comprises a worm screw and a worm wheel, wherein the worm wheel is engaged with the worm screw connected with a motor shaft; a worm wheel shaft is provided with teeth engaged with a big toothed wheel fixedly installed on a hollow shaft and a core shaft which is rotatablely installed on the casing; a planet wheel carrier is fixedly installed at the lower end of the hollow shaft; a planet wheel which can rotate around a pin shaft on the planet wheel carrier is provided with an eccentric pin bolt hinged with one end of a connecting rod. The lower end of the core shaft arranged in the hollow shaft is provided with a sun wheel, and the planet wheel is engaged with the sun wheel; an engaging and disengaging mechanism controlled by an adjusting mechanism is arranged between the hollow shaft and the core shaft.

Description

Oscillation angle adjuster for electric fan

The present invention relates to a kind of preset type oscillation angle adjuster for electric fan, be specially adapted to control the step-less adjustment pivot angle mechanism that regulates pivot angle in the mode of planetary gear train change crank length.

In the prior art, the yaw of fan is generally all realized by the fourbar linkage motion.Thereby wherein a kind of motion with planetary gear train changes the adjusting that crank length changes the four pole length ratios realization pivot angle of fourbar linkage, as practicality novel " a kind of step-less adjustment pivot angle electric fan " (CN87210896.1A).Its principle is " adopt the crankrocker mechanism of ' the non-adjustable electric fan of pivot angle ', but cancel original fixed length crank, and a cover planetary gear train is set on the position of crank, utilize the revolution of planetary gear train, realize any adjustment of crank length ".Its textural worm screw (4) that has kept traditional pivot angle electric fan, worm gear (5), worm-wheel shaft (3), the ways of deceleration that gear (2) is formed, difference is that " lower end that the hollow shaft (6) of gear (2) stretches out gear-box (17) is fastened with eccentric mass (14); the gear (9) that is fixed on the axle (8) is equipped with in the outside of eccentric mass (14); gear (9) can rotate around axle (7); gear (9) becomes eccentric assembling with pin (12); pin (12) is hinged with connecting rod one end; on the axle (7), the lower end firmly is connected with friction disk (1) and gear (13) respectively, gear (13) is a planetary gear train with gear (9) engagement, disk (1) by spring (21) by steel ball (20) be pressed on gear (2) above, the manipulation of the drag-line (18) that lever (19) can connect by the button on the fan panel makes disk (1) with gear (2) combination or separate.Thereby " this constructional device manned clutch and adjusting angle mechanism is developed make crank to obtain to adjust between planetary system and fixed shaft gear train and the locking two states, realize stepless adjustment fan pivot angle.But, promptly go round and begin again from big to small again from small to large, so the user will rely on by circular resistor disc (11), diode D because the variation of pivot angle is that running with planetary gear train is periodic variation in the adjustment process ₁-D _n, resistance R ₁-R _n, LED ₁-LED _nCould judge that Deng the pivot angle display unit of forming the pivot angle size of now regulates.This adjusting is a kind of regulative mode of search type: the user is by the button on the lower panel and be careful the variation of pivot angle tutorial light simultaneously, discharges button when the pivot angle tutorial light manifests the pivot angle value that the user requires immediately.Obviously, there is following deficiency in this regulating device: (1) is regulated convenient inadequately, (2) attemperator directly to the button application of force with cut-off clutch and drag friction disk, steering force is bigger.(3) pivot angle shows that part makes complex structure, cost height.

The stepless angle adjusting mechanism that the purpose of this invention is to provide a kind of automatic operation, a user knob on need only rotating panel makes it to aim at required pivot angle scale value, and regulating mechanism just can automatically be transferred to the pivot angle value corresponding with scale to electric fan.Exempted user's search procedure.

The present invention realizes in the following manner: with the hollow shaft of planetary wheel carrier and sun gear binding and the other end of mandrel one a cover click formula clutch and a cover cam-swing link type pivot angle detector are being installed respectively; Other has a movable baffle plate that handled by knob by the user.The pivot angle detector regularly compares with the pivot angle setting value that movable baffle plate is imported, as finds that both differences then rush open ratchet automatically, makes clutch separation, and mechanism enters adjustment; Be in course of adjustment, pivot angle actual value and setting value relatively are ongoing, when both agree, adjust at once and finish.

The invention provides a kind of oscillation angle adjuster for electric fan for this reason, comprise a housing, a cover is from the worm gear reducer mechanism of motor shaft acquisition power, and one overlaps the variable-length crank mechanism that is made of planetary wheel mechanism; It is characterized in that an anchor plate and a ratchet being housed respectively in the upper end of sun wheel shaft and sleeve; One bearing support that can swing in horizontal plane around vertical bearing pin is housed on the anchor plate, and supporting member comprises a fork and a push pedal, and fork can be swung in vertical plane and by a spring biased downward around the horizontal axis on the bearing support; One is installed in the baffle plate on the housing; This baffle plate can be handled but only can one lateral margin be arranged on the baffle plate along a direction to-and-fro motion, has a breach on this lateral margin, and the fork free end only can pass baffle plate by the breach on the baffle plate lateral margin makes fork rotate with anchor plate; Have a ratchet to be installed on the anchor plate, and pressed to ratchet by elastic mechanism, push pedal withstands on the ratchet; Be shaped on the camming surface of a sealing on the described ratchet; One reciprocating follower is installed on the anchor plate, and the one end slides along camming surface, and the other end withstands on the fork.

Advantage of the present invention and structure can from below in conjunction with accompanying drawing description better understood, in the drawings,

Fig. 1 is the overall construction drawing of angle pendulum regulating mechanism of the present invention,

Fig. 2 is the partial top view of angle pendulum regulating mechanism shown in Figure 1; Show the state of engaging and disengaging gear " disengagement ";

Schematic representation when Fig. 3 is engaging and disengaging gear " joint ";

Fig. 4 is the partial view of controlling device shown in Figure 1; And

Fig. 5 is the partial elevation view of angle pendulum regulating mechanism shown in Figure 1.

Fig. 1-Fig. 5 shows a most preferred embodiment of the present invention, the worm screw 2 shown in it, and worm gear 1, worm-wheel shaft 3, gearwheel 5, hollow shaft 6, mandrel 7, planet carrier 9, planet wheel 11, central gear 12 etc. are formed known planetary system-variable crank structure.Anchor plate 28 is contained on the mandrel 7, and ratchet 29 is equipped with in anchor plate 28 sides, makes the usefulness of clutch.Ratchet 29 is lived gearwheel 5 sour jujubes under the spring force effect when normally moving by spring sheet bias voltage (see figure 5), and the mandrel 7 of arranged concentric rotates with putting within it also to make hollow shaft 6.

On the anchor plate 28 support 30 is housed in addition, support 30 can be around pivot pin 31 at the supporting plane upper deflecting, and it comprises fork 32, push pedal 33 and check plate 34; Push pedal 33 is made of one with check plate 34, ratchet 29 can be backed down when support 30 deflections, makes it to break away from gearwheel 5.Check plate 34 approximate vertical are extended, and cooperate with the anchor plate side, catch on anchor plate 28 after the distance of itself and anchor plate 28 should make push pedal 33 push away in the canine tooth gear teeth to ratchet, make support 30 no longer deflection (see figure 4)s.

In the upper-end surface of gearwheel 5 ring cam set 35 is arranged, the cam on it can be any close-shaped.A fork 32 has been installed on the support 30, and the root of fork 32 and support 30 are hinged, and can do rotation motion with the relative anchor plate 28 of support.One extension spring 36 acts on fork 32 upper pendulum bars to pressing down tappet 37, and it is contacted with camming surface all the time.Tappet 37 is inserted in the guide hole on the anchor plate 28 slidably, and its two ends contact with the camming surface of fork 32 with gearwheel 5 respectively.Two ends of tappet 37 can be sphere or roller, to improve exercise performance.When relatively rotating between mandrel 7 and the hollow shaft 6, fork 32 is swung with the fluctuating of camming surface under the acting in conjunction of tappet 37 and extension spring 36.Fork 32 has two functions: the one, and swing by the track that cam profile curve provides, thereby indicate relative angular displacement amount between mandrel 7 and the hollow shaft 6; The 2nd, when being obstructed, its free end rotation produces torque, and make the clutch mechanism separation and make the mandrel braking.In order to control the angular displacement between mandrel 7 and the hollow shaft 6, on housing, be provided with an adjusting plate 38, it is contained on the guide pillar 40 that is fixed on the housing, and baffle plate can not rotate, and a spring 41 is equipped with in its lower end.Baffle plate 38 can be controlled by the adjusting knob on the fan board by the various kinds of drive (as drag-line 21), makes the displacement that is parallel to tappet 37 axis.Have for example wedge shape of a breach 39(with definite shape in the appropriate location, edge of baffle plate 38), the opening edge width of breach is little, only can allow that the free end of fork 32 passes through, and promptly the thickness of the size of opening edge and fork 32 is roughly the same.

Present embodiment is set up a complete closed loop indifference regulating system, and its working procedure is as follows: motor power is by worm screw 2, and worm gear 1, worm-wheel shaft 3 drive gearwheel 5 rotations.Put the spatial position of having decided breach 39 by the displacement that the adjusting knob (not shown) on the control panel is made in the certain limit baffle plate 38, promptly imported given signal to regulating system; Being conditioned object-crank length is taken a sample by cam swing mechanism, amplification by fork 32 and by the free end position feedback of fork 32 to baffle plate 38, baffle plate 38 itself is again a comparator, it obtains the difference of sampled value and setting value by computing, fork 32 positions overlap with breach 39 positions when sampled value is consistent with setting value, and at this moment fork 32 whenever circles and all must do not stopped by breach 39.If sampled value is different with setting value, its free end was blocked by baffle plate 38 when fork 32 forwarded on baffle plate 38 positions, rushed open clutch immediately and made mandrel 7 brakings, caused the planetary gear train action and change crank length, thereby changed the pivot angle of electric fan.Meanwhile, 32 swings of cam drive fork are slided fork 32 free ends on baffle plate 38 edges, constantly make comparisons on baffle plate 38 with new sampled value and setting value.Because cam profile is continuous, so no matter the change of setting value is to increase or reduce, sampled value finally can be consistent with setting value, at this moment fork 32 free ends find breach 39 and pass through breach 39, thereby discharge the mandrel 7 be braked and engaging clutch again, so fan is with new pivot angle operation.

Claims

1, a kind of electric fan yaw angle pendulum regulating mechanism comprises housing, one cover obtains the endless screw-worm gear-reduction gears mechanism of power from motor shaft, one cover is characterized in that also comprising the hollow shaft and the mandrel that are coaxially set by the variable-length crank mechanism that planetary wheel mechanism constitutes; Be fixedly mounted on hollow shaft and mandrel the two one of the top one with the ratchet of described worm-wheel shaft engagement; And one be installed in the two the anchor plate of another top of hollow shaft and mandrel, one bearing support that can swing in horizontal plane around vertical bearing pin is housed on the anchor plate, bearing support comprises a fork and a push pedal, and fork can be swung in vertical plane and by a spring biased downward around the horizontal axis on the bearing support; One is installed in the baffle plate on the housing, and this baffle plate can be handled but only can one lateral margin be arranged on the baffle plate along a direction to-and-fro motion, and a breach is arranged on this lateral margin, and the fork free end only can pass baffle plate by the breach on the baffle plate lateral margin makes fork rotate with anchor plate; There is a ratchet to be installed on the anchor plate, and pressed to ratchet by elastic mechanism, push pedal withstands on the ratchet, be shaped on the camming surface of a sealing on the described ratchet, one reciprocating follower is installed on the anchor plate, the one end slides along camming surface, and the other end withstands on the fork, the sun gear of described planetary gear train is arranged on the mandrel below, and planetary wheel carrier is installed in the hollow shaft below, planet wheel detour on the star wheel frame bearing pin rotation and with the sun gear engagement, an eccentric pin that articulates with a connecting rod one end of oscillating head mechanism is arranged on the planet wheel.

2, controlling device as claimed in claim 1 is characterized in that said bearing support also comprises the check plate that is made of one with push pedal, and this plate generally perpendicularly extends, and can rest on the stop surface of anchor plate the motion with the restriction anchor plate.

3, controlling device as claimed in claim 1 is characterized in that ratchet is by a spring bias voltage and a ratchet engaged.

4, controlling device as claimed in claim 1 is characterized in that breach on the described baffle plate is a wedge shape, and its width that is positioned at the opening on the baffle edge is slightly larger than the free-ended thickness of fork.

5, controlling device as claimed in claim 1 is characterized in that the spacing between the stop surface on described check plate and the described anchor plate should be even as big as breaking away from engagement with the ratchet top from ratchet.

6, controlling device as claimed in claim 1 is characterized in that the position of ratchet and ratchet engaged and ratchet and worm-wheel shaft position engaged stagger along the thickness direction of ratchet.

7, controlling device as claimed in claim 1 is characterized in that described follower is equipped with a roller along the end that described camming surface slides, and this roller can roll along camming surface.