CN101587797B

CN101587797B - Centrifugal switch suitable for motor driving

Info

Publication number: CN101587797B
Application number: CN2009100999541A
Authority: CN
Inventors: 鲁文龙
Original assignee: 鲁文龙
Current assignee: Ningbo Zhenhai Micro Electric Motors Factory Co., Ltd.
Priority date: 2009-06-21
Filing date: 2009-06-21
Publication date: 2012-04-25
Anticipated expiration: 2029-06-21
Also published as: CN101587797A

Abstract

A centrifugal switch suitable for motor driving comprises a centrifuge and a wire box body; the centrifuge is set with an axially flexible sliding bushing glidingly matched with a shaft; the wire box body is provided with a contact pole piece set in which clutching of contacts is controlled by front end of a movable rod which is rotatably matched with the wire box body; the centrifugal switch further includes a toggle rod whose middle part is rotatably matched with one side at bottom of the wire box body and is reset by a torque spring; front end of the toggle rod contacts bottom end face of the sliding bushing, and the toggle rod rotates under control of the sliding bushing; further, tail end of the toggle rod is collided with the movable rod. This invention achieves functions as follows:it ensures stable operation of the movable rod since end face of the sliding bushing is regarded as working surface for switching contacts; it simplifies structure of the centrifugal switch and enhan ces strength of the toggle rod in adoption of the integrative toggle rod, and further prolongs service life of the whole centrifugal switch; further, it reduces complexity of installment and enhances convenience for daily maintenance since the integrative toggle rod is adopted.

Description

A kind ofly be applicable to motor-driven centrifugal switch

Technical field

The present invention relates to a kind of centrifugal switch, particularly a kind of motor-driven centrifugal switch.

Background technology

Be fitted with centrifugal switch in existing washing machine, the dry cleaner equipment; This centrifugal switch is mainly used in electric motor starting, high-revolving conversion; The principle of centrifugal switch mainly relies on the centrifugal force of balancing weight to realize the conversion of corresponding contacts, adopts sedimentator, wiring boxcar like its primary structure of washing machine centrifugal switch commonly used; One end of sedimentator disposes the control panel of axial slip, disposes transfer contact in the wiring boxcar, and wiring boxcar exterior oscillations has motion bar, and the difference of motion bar control transformation contact changes, and the swing of motion bar is driven by control panel; By existing structure, the contact zone of motion bar and control panel is the outer circle diameter of control panel on circle, because outer circle diameter is limited after all to the contact area of circle, in use is prone to slippage first, causes fault; Second contact area is little, and is easy to wear, reduced the useful life of whole utensil.

The centrifugal switch of the Chinese patent document patent No. 200510122011.8 disclosed split-phase motors is arranged again, comprising: sleeve, it is inserted in the stopper of axle, and on its outer peripheral face, is formed with flange part; Slide block, it is in the outside of above-mentioned sleeve, movably inserts along the direction of principal axis of above-mentioned sleeve, and when arriving set position, breaks off the ancillary coil circuit; Centrifugal actuator, it is formed with more than 2 at least, and when above-mentioned axle is rotated, opens laterally through the centrifugal force that produces; Extension spring, it is to the flexible restoring force of directive effect of the above-mentioned centrifugal actuator of convergence, and the inner face of sleeve is formed with draw-in groove, and this draw-in groove carries out face with the two sides of the direction of rotation of above-mentioned stopper and contacts.The sleeve keying operation of contact, slippage control below is up and down adopted in this design, and this opening/shutting mode is owing to take the mode of directly touching, and its impulsive force is bigger, and the contact opens and closes fluctuation of service, and is fragile.

Summary of the invention

Technical problem to be solved by this invention is that the present situation to prior art provides a kind of designs simplification, stable, long service life and regular maintenance to be applicable to motor-driven centrifugal switch easily.

The present invention solves the problems of the technologies described above the technical scheme that is adopted:

A kind ofly be applicable to motor-driven centrifugal switch, comprise sedimentator and line box body, be fitted with an axial stretching and the sliding sliding network cover of joining of axle on the sedimentator; Be fitted with contact pole piece group in the line box body; And clutch by contact in this contact pole piece group of motion bar front-end control that is rotatably assorted with the line box body; This centrifugal switch also is provided with a poke rod, be rotatably assorted online box body bottom surface one side and resetted by torsion spring of center; The front end of this poke rod contacts with sliding network cover bottom face, and is rotated by sliding this poke rod of network cover control, and the poke rod tail end is conflicted on motion bar.

Above-mentioned poke rod front end is branched into two member bodies according to arc, and this member body front end all is shaped on the projection body, and the crowning of this projection body and above-mentioned sliding network cover bottom face touching.

Above-mentioned poke rod tail end is shaped on driving handle, and conflicting with above-mentioned motion bar front end through this driving handle cooperates.

Above-mentioned poke rod middle part is provided with rotation seat, and correspondingly, above-mentioned line box body bottom surface one side is shaped on protruding supporting seat, and supporting seat and rotation seat are rotatably assorted.

Above-mentioned torsion spring is through on the swivel pin, and an end of torsion spring is by line box body location, and the other end of torsion spring is located by rotation seat.

Establish block on the above-mentioned rotation seat, the other end of above-mentioned torsion spring is spacing by this block.

Compared with prior art, the invention has the advantages that:

Adopt the end face of sliding network cover to open and close working face as the contact, its contact area is big, changes the method for original employing looped drive, has guaranteed that motion bar is stable; The integral type poke rod when having simplified the centrifugal switch structure, has improved the intensity of poke rod, has promptly also improved the useful life of whole centrifugal switch; The integral type poke rod is beneficial to and reduces the complexity of installing, and has improved the convenience of regular maintenance.

Description of drawings

Fig. 1 is the vertical partial schematic sectional view of embodiment of the invention sedimentator when static;

Fig. 2 is the floor map of embodiment of the invention sedimentator when static;

Vertical partial schematic sectional view when Fig. 3 is the work of embodiment of the invention sedimentator;

Floor map when Fig. 4 is the work of embodiment of the invention sedimentator;

Fig. 5 is that the master during the keeping flat of poke rod looks sketch map among Fig. 1;

Fig. 6 is the elevational schematic view of Fig. 5;

Fig. 7 is that the embodiment of the invention one is used for the decomposing schematic representation on the washing machine;

Fig. 8 is that the embodiment of the invention two is used for the decomposing schematic representation on the dryer.

Embodiment

Embodiment further describes the present invention below in conjunction with accompanying drawing.

Like Fig. 1, shown in Figure 2, a kind ofly be applicable to motor-driven centrifugal switch, forms by two parts: sedimentator 1 and line box body 2.Sedimentator 1 is installed on the machine shaft, and line box body 2 is installed on the electric motor end cap.

The structure of general sedimentator 1 comprises the drive seat 11 that cooperates with the motor shaft plug-in mounting, and the equal symmetrical hanging sleeve of these drive seat 11 top cross-arms has balance weight body 12, is linked with extension spring 13 between the balance weight body 12, and extension spring 13 control balance weight body 12 are inwardly leaned on cage; And hook with the both sides of sliding network cover 3 bottom side of this balance weight body 12; Increase along with the motor rotary speed; Balance weight body 12 overcomes the centrifugal force of rotation outwards to be thrown away, and drives outwards shrinking back of sliding network cover 3, and the axial stretching of sliding like this network cover 3 drives poke rod 4; Thereby drive motion bar 5, and then the conversion of control line box body 2 interior pole piece group 6 each contact, contact.

The closure of contact pole piece group 6 is to be accomplished in the motion of sedimentator 1 closure-throw away by poke rod 4, motion bar 5 with breaking off in the line box body 2, sees Fig. 1, Fig. 2, Fig. 3, Fig. 4.

As shown in Figure 5, described poke rod 4 front ends are branched into two member bodies 41 according to arc, and described member body 41 front ends all are shaped on projection body 42, and the crowning of this projection body 42 and described sliding network overlap the touching of 3 bottom faces.

On poke rod 4, the high spot of projection body 42 is to overlap 3 plane contact and the position of separating with sliding network, and driving handle 43 is and motion bar 5 contact and the positions of separating that block 45 is only leaning on of torsion spring 23 1 ends.The other end of torsion spring 23 is by ending, so that poke rod 4 can not arrogated to oneself because of the gap after sedimentator 1 is thrown away with line box body 2 table planes.Torsion spring 23 has the effect of stage clip simultaneously, and poke rod 4 is packed into axially can play in the fixed support on the line box body 2.

Described supporting seat 21 comprises two securing supports 24 that are arranged in parallel, and described rotation seat 44 places between two securing supports 24, and by swivel pin 22 with the two cross-under together.

Like Fig. 1, shown in Figure 2; Motor is not when switching on work; The sedimentator 1 of centrifugal switch is in closure state; The poke rod 4 one end projection bodies 42 that sliding network overlaps 3 baseplanes and line box body 2 in the sedimentator 1 press, and on the supporting seat 21 of poke rod 4 by swivel pin 22 fixing online box bodies 2, the other end driving handle 43 of poke rod 4 presses motion bar 5.Motion bar 5 makes silver contact A and silver contact B under the pressing of poke rod 4 and compress the spring leaf of contact pole piece group 6 in the line box body 2, and silver contact D starts with silver contact E and contacts.The electric motor starting winding loop is in on-state.

Like Fig. 3, shown in Figure 4, the entry into service of motor energized, rotating speed reaches 72% to 83% o'clock of its synchronous speed; Sedimentator 1 is owing to action of centrifugal force is thrown away; Make the sliding network that presses motion bar 5 overlap 3 baseplanes and throw off, the spring leaf of contact pole piece group 6 backs down the motion bar 5 of rotary type under the elastic force effect of self, make silver contact A and silver contact B; The startup silver contact of silver contact D and silver contact E is thrown off, and silver contact C contacts with silver contact D.

Fig. 7 is the embodiment of the invention one, promptly is used for the structure chart on the washing machine; Fig. 8 is the embodiment of the invention two, promptly is used for the structure chart on the dryer; The motor that washing machine, dryer were equipped with is different, so the intermediate shaft hole of corresponding drive seat 11 is different; The electric motor starting rotating speed and the Second-Stage Rotating Speed of being furnished with also are not quite similar; So the weight of the balance weight body 12 that washing machine, dryer are adaptive is not quite similar; So no matter be washing machine and drier, or miscellaneous equipment, if when rotating speed of motor need be changed; The present invention is all applicable, should correspondingly get final product for every kind of pairing axle of equipment prescription formula, structure weight.

Claims

1. one kind is applicable to motor-driven centrifugal switch, comprises sedimentator (1) and line box body (2), is fitted with axial stretching and the sliding sliding network cover (3) of joining of axle on the described sedimentator (1); Be fitted with contact pole piece group (6) in the described line box body (2); And clutch by this interior contact of contact pole piece group (6) of motion bar (5) front-end control that is rotatably assorted with described line box body (2); It is characterized in that: also be provided with a poke rod (4), the center is rotatably assorted and resets in described line box body (2) bottom surface one side and by torsion spring (23); The front end of this poke rod (4) contacts with described sliding network cover (3) bottom face, and controls this poke rod (4) by described sliding network cover (3) and rotate, and described poke rod (4) tail end is conflicted on motion bar (5).

2. a kind of motor-driven centrifugal switch that is applicable to as claimed in claim 1; It is characterized in that: described poke rod (4) front end is branched into two member bodies (41) according to arc; Described member body (41) front end all is shaped on projection body (42), and the crowning of this projection body (42) and the touching of described sliding network cover (3) bottom face.

According to claim 1 or claim 2 be applicable to motor-driven centrifugal switch, it is characterized in that: described poke rod (4) tail end is shaped on driving handle (43), conflicting with described motion bar (5) front end through this driving handle (43) cooperates.

4. as claimed in claim 3ly be applicable to motor-driven centrifugal switch; It is characterized in that: described poke rod (4) middle part is provided with rotation seat (44); Correspondingly; Described line box body (2) bottom surface one side is shaped on protruding supporting seat (21), and supporting seat (21) is rotatably assorted with described rotation seat (44).

5. as claimed in claim 4ly be applicable to motor-driven centrifugal switch; It is characterized in that: described supporting seat (21) comprises two securing supports (24) that are arranged in parallel; Described rotation seat (44) places between two securing supports (24), and by swivel pin (22) with the two cross-under together.

6. as claimed in claim 5ly be applicable to motor-driven centrifugal switch, it is characterized in that: described torsion spring (23) is through on the described swivel pin (22), and an end of torsion spring (23) is by line box body (2) location, and the other end of torsion spring (23) is located by rotation seat (44).

7. as claimed in claim 6ly be applicable to motor-driven centrifugal switch, it is characterized in that: establish block (45) on the described rotation seat (44), the other end of described torsion spring (23) is spacing by this block (45).