CN1779879B - Contactor of centrifugal switch for single-phase induced motor - Google Patents
Contactor of centrifugal switch for single-phase induced motor Download PDFInfo
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- CN1779879B CN1779879B CN 200410072812 CN200410072812A CN1779879B CN 1779879 B CN1779879 B CN 1779879B CN 200410072812 CN200410072812 CN 200410072812 CN 200410072812 A CN200410072812 A CN 200410072812A CN 1779879 B CN1779879 B CN 1779879B
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- control lever
- leaf spring
- contact
- switch control
- spring switch
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Abstract
A contact device of centrifugal switch for single-phase induction motor features that the first and the second leaf springs as the switch control bar have the convex contact for reliable contact between the movable control bar and axle ring even if it is abraded and said convex contact is positioned in the stroke distance range between the closed and open positions of movable control bar.
Description
Technical field
The present invention relates to a kind of contact device of centrifugal switch for single-phase induced motor, more particularly, even the axle collar contact site that is relevant movable control lever weares and teares because of friction, under the situation that the stroke distances of control moving contact portion shortens when movable control lever closure/disconnection, the working position, contact that also can make movable control lever is above each contact projection, compensate the wear extent of movable control lever, the contact device of the centrifugal switch for single-phase induced motor that can prolong switch useful life and prolong.
Background technology
In general, motor is the device that electric energy is converted to mechanical energy, can be divided into direct current machine and alternating current machine according to the power supply that uses.Alternating current machine can be divided into induction machine, synchronous machine and commutating machine etc., and induction machine also is divided into 3 phase induction machine and single phase induction motors.
That single phase induction motor generally has is simple in structure, firm, become more readily available advantage such as single phase poaer supply, thus as drive motors be widely used in home-use, office is used, industrial, agricultural is used etc. with on the electric machine.But, single phase induction motor is because can not own across-the-line starting, so in order to produce starting torsion except being equipped with main coil, also be equipped with the dephased secondary coil of main coil and centrifugal switch and switch drive portion, when the rotary speed of rotor reaches 70～80% of synchronizing speed, centrifugal switch and switch drive portion make secondary coil form open circuit from main coil.
Specify the centrifugal switch and the switch drive portion of single phase induction motor in the past below in conjunction with drawings and Examples.Fig. 1 to Fig. 4 is centrifugal switch for single-phase induced motor and switch drive portion in the past, Fig. 1 is the front elevation of centrifugal switch for single-phase induced motor and switch drive portion in the past, Fig. 2 is the sectional side view of centrifugal switch for single-phase induced motor and switch drive portion in the past, Fig. 3 be the 1st leaf spring switch control lever and main coil terminal in conjunction with shape attitude side view, Fig. 4 be the 2nd leaf spring switch control lever and heating power supply terminal in conjunction with shape attitude side view.
As shown in the figure, centrifugal switch for single-phase induced motor and switch drive portion include lining 20, slide block 30, centrifugal switch 60, a pair of centrifugal 40 and a pair of spring 50.Wherein, lining 20 is combined on the rotating shaft 10 of single phase induction motor and rotates together with rotating shaft 10; When slide block 30 combines rotation with lining 20 lining 20 is done motion to the axis direction of rotating shaft 10, and be formed with the axle collar 32 of its diameter of expansion for the movable control lever 62 that contacts centrifugal switch 60 makes centrifugal switch 60 closure/disconnection; Centrifugal switch 60 utilizes the secondary coil of slide block 30 spiral from the stator of single phase induction motor to the main coil closure; A pair of centrifugal 40 is combined on the slide block 30, slide block 30 is done relative motion, and utilize the centrifugal force rotation that 30 pairs of linings 20 of slide block are axially moved when rotating shaft 10 rotations; One end of a pair of spring 50 is combined on centrifugal 40 separately, applies to centrifugal 40 and makes its approaching elastic force mutually.
In addition, in order to exert pressure to the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67, make the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67 carry out switching work, on the position near the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67 of the terminal part of contact operate portions 62c, be formed with separately protrude certain altitude push lug boss 62d.
According to such formation, the operation of the centrifugal switch of single phase induction motor and switch drive portion was as follows in the past:
When rotating shaft 10 stopped, centrifugal 40 was positioned on the primary position near rotating shaft 10 under the resilient force of spring 50, and slide block 30 is positioned at from guider position far away relatively.At this moment, the axle collar contact site 62b of movable control lever 62 keeps the state of being pushed by the axle collar 32 as shown in Figure 2, and the lug boss 62d that respectively pushes on the operate portions 62c terminal of contact exerts pressure to the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67, make the terminal part of the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67 be connected secondary coil terminal 68 separately, be positioned at the start position that main coil terminal 64 is connected with secondary coil terminal 68.In this state, if turn-on power in main coil and the secondary coil, rotating shaft 10 rotation.
If the rotary speed of rotating shaft 10 reaches about 70～80% rotary speeies of synchronizing speed, the centrifugal force that acts on centrifugal 40 is bigger than spring 50 pulling force.And a side of centrifugal 40 moves laterally along guider, simultaneously another side guide side shifting that slide block 30 is done relative motion.Thus, slide block 30 along the axis direction of rotating shaft 10 to the guider side shifting.
At this moment, the axle collar 32 of exerting pressure to the axle collar contact site 62b of movable control lever 62 moves, and the axle collar 32 contact site 62b remove pressed state, so movable control lever 62 rotates to counter clockwise direction in Fig. 2 under spring 63 resilient force of resiliency supported contact operate portions 62c.
Because movable control lever 62 rotates, the lug boss 62d that respectively pushes on the operate portions 62c terminal of contact also removes the state of pushing the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67, so the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67 utilize the elastic force of self to rotate to the installation site of movable control lever 62 direction.At this moment, the opposite side terminal part of the 1st leaf spring switch control lever 65 disconnects with secondary coil terminal 68, is converted to the state with heating splicing ear 69a closure; The 2nd leaf spring switch control lever 67 is the state with heating splicing ear 69b closure [on] from the state exchange that disconnects.That is, main coil is converted to the state with the secondary coil closure, becomes the state that disconnects with heating splicing ear 69a, so turn-on power in main coil only continues rotation rotating shaft 10.
As mentioned above, centrifugal switch for single-phase induced motor and switch drive portion were in the past: because constitute the face of the moving contact plate of the 1st leaf spring switch control lever and the 2nd leaf spring switch control lever is smooth form, so can only decide the structure of moving contact amount of movement with the amount of pushing to control lever running direction.
The motor that uses centrifugal switch and switch drive portion be the initial start stage axle collar and movably control lever contact and the structure of rotating, so if the contact-making surface of movable control lever weares and teares because of friction, the 1st leaf spring switch control lever and the 2nd leaf spring switch control lever are at the position that lug boss contacts of pushing with movable control lever, the motive force that movable control lever promotes moving contact weakens gradually, and the problem that the contact can not closure/disconnection takes place the result.
Summary of the invention
The present invention invents in order to solve above-mentioned problem points in the past, its purpose is, even provide a kind of axle collar contact site of movable control lever to wear and tear because of friction, when movable control lever closure/disconnection under the situation that the stroke distances of control moving contact portion shortens, also can make the working position, contact of movable control lever compensate movable control lever wear extent above the projection of contact in each, the contact device of the centrifugal switch for single-phase induced motor that can prolong switch useful life.
In order to achieve the above object, according to the contact device of centrifugal switch for single-phase induced motor of the present invention, on the 1st leaf spring switch control lever of centrifugal switch and the 2nd leaf spring switch control lever, be formed with at movable control lever and also can contact the contact projection that movable control lever is pushed lug boss under because of the situation of following the axle collar and wearing and tearing.
1st, the contact projection of 2 leaf spring switch control levers is positioned at movable control lever closure/disconnection (ON OFF) in the stroke distances scope between the position, contacts the lug boss of pushing of movable control lever.
The effect of invention centrifugal switch for single-phase induced motor in the past can not promote moving contact with movable control lever under the situation of the contact surface abrasion of movable control lever, and moving contact does not contact fixed contact, so difficulty is carried out in normal switch running.But, the contact device of foregoing above-mentioned centrifugal switch for single-phase induced motor, protrude separately at the 1st, 2 leaf spring switch control levers of moving contact plate and to be formed with the contact projection, even because of the axle collar contact site of movable control lever weares and teares, also can make the working position, contact of movable control lever above each contact projection under the situation that the stroke distances of control moving contact portion shortens when movable control lever closure/disconnection, compensate the wear extent of movable control lever, so the advantage of switch prolongation in useful life is arranged.
Description of drawings
Fig. 1 to Fig. 4 is the accompanying drawing toward centrifugal switch for single-phase induced motor and switch drive portion,
Fig. 1 is the front elevation of centrifugal switch for single-phase induced motor and switch drive portion in the past.
Fig. 2 is the sectional side view of centrifugal switch for single-phase induced motor and switch drive portion in the past.
Fig. 3 be the 1st leaf spring switch control lever and main coil terminal in conjunction with shape attitude side view.
Fig. 4 be the 2nd leaf spring switch control lever and heating power supply terminal in conjunction with shape attitude side view.
Fig. 5 to Figure 11 is according to centrifugal switch for single-phase induced motor contact device of the present invention,
Fig. 5 and Fig. 6 are the formation of diagram centrifugal switch contact device and the profile of effect.
Fig. 7 to Fig. 9 is the work structuring key diagram of movable control lever.
Figure 10 is the plane graph and the side view of the 1st leaf spring switch control lever.
Figure 11 is the plane graph and the side view of the 2nd leaf spring switch control lever.
The explanation of accompanying drawing major part symbol:
60: centrifugal switch 62: movable control lever
62d: push 65: the 1 leaf spring switch control levers of lug boss
67: the 2 leaf spring switch control levers 70: contact projection
Embodiment
Below in conjunction with the concrete bright the present invention of drawings and Examples.Fig. 5 to Figure 11 is according to centrifugal switch for single-phase induced motor contact device of the present invention, Fig. 5 and Fig. 6 are the formation of centrifugal switch contact device and the profile of effect, Fig. 7 to Fig. 9 is the work structuring key diagram of movable control lever, Figure 10 is the plane graph and the side view of the 1st leaf spring switch control lever, and Figure 11 is the plane graph and the side view of the 2nd leaf spring switch control lever.
As shown in the figure, centrifugal switch for single-phase induced motor 60 includes outer cover 61, axle collar contact site 62b, movable control lever 62, spring the 63, the 1st leaf spring switch control lever the 65, the 2nd leaf spring switch control lever 67, secondary coil terminal 68 and heating power supply terminal 69a, heating power supply terminal 69b. wherein, and outer cover 61 has certain inside space; Axle collar contact site 62b is combined in rotation on the outer cover 61 by hinge axis 62a; Movable control lever 62 possesses contact operate portions 62c is arranged; The movable control lever 62 of spring 63 resiliency supported; One side of the 1st leaf spring switch control lever 65 is fastened on main coil terminal 64, and protrudes certain-length in order to possess elasticity, near contact operate portions 62c; One side of the 2nd leaf spring switch control lever 67 is fastened on heating power supply terminal 66, and protrudes designated length in order to possess elasticity, near contact operate portions 62c; Secondary coil terminal 68 and heating power supply terminal 69a are installed in the opposite at the opposite side terminal part of the 1st leaf spring switch control lever 65 across the 1st leaf spring switch control lever 65, utilize the 1st leaf spring switch control lever 65 to open and close separately; Heating power supply terminal 69b is installed on the position near the 2nd leaf spring switch control lever 67 opposite side terminal parts and opens and closes.
In addition, in order to exert pressure to the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67, make the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67 open and close running, on the position near the 1st leaf spring switch control lever 65 and the 2nd leaf spring switch control lever 67 of contact operate portions 62c terminal part, be formed with separately protrude that specified altitude assignment forms push lug boss 62d.
Such centrifugal switch for single-phase induced motor is at the 1st fixing on the main coil terminal 64 leaf spring switch control lever 65 be fixed on the 2nd leaf spring switch control lever 67 on the heating power supply terminal 66 and be formed with and can make the contact projection 70 within the stroke distances scope between the position of movable control lever 62 in closure/disconnection.
1st, projection 70 formation embossing forms in the contact of 2 leaf spring switch control levers 65,67 are best, but also can adopt curved lever, the other variforms such as protrusion of stickup.
At this moment, the 1st, 2 leaf spring switch control levers 65, the height of 67 contact projection 70 and width such as Fig. 7 are to the fixed contact (C1) of consideration centrifugal switch shown in Figure 9 and the spacing between the moving contact (C2) and movably design after the stroke distances of control lever 62, and the movable control lever 62 that operates by the axle collar 32, when electric motor starting if closed situation becomes with the illustrated state of solid line; When motor rotation if situation about disconnecting becomes the illustrated state of with dashed lines.Consider above-mentioned situation, under the state of movable control lever 62 closure/disconnections, make contact projection 70 push between the lug boss 62d spacing (for example: 1.2mm) in the scope.
Other constitute with centrifugal switch for single-phase induced motor was identical in the past, so no longer repeat specification here.
As mentioned above, according to the contact device of centrifugal switch for single-phase induced motor of the present invention as shown in Figure 9, the pushing that lug boss 62d separates of movable control lever 62 and position (L1) that switch disconnects and movable control lever 62 when running well utilization push lug boss 62d make between the position (L1) of switch closure stroke distances (for example: 1.2mm) be formed with contact projection 70 in the scope, so under the situation of movable control lever 62 wearing and tearing, on the position (L3) of starting [on], the lug boss 62d that pushes of movable control lever 62 is positioned at above the contact projection 70, thus switch closure [on].
Promptly, though the axle collar contact site 62b contact-making surface 62e on the movable control lever 62 weares and teares because of friction, also can make under the situation that the stroke distances of control moving contact portion shortens when movable control lever 62 closures/disconnection the contact operate portions 62c of movable control lever 62 be positioned at each contact projection 70 above, thereby make moving contact can not contact fixed contact.
Claims (3)
1. the contact device of a centrifugal switch for single-phase induced motor, wherein centrifugal switch and switch drive portion comprise: be combined on the rotating shaft of unidirectional induction machine the lining that rotates together with rotating shaft; When combining rotation with lining lining is done motion to the axis direction of rotating shaft, and be formed with the slide block of the axle collar of enlarged diameter; Outer cover with certain inner space; By hinge axis be hinged on the outer cover, by the peristome by outer cover to exposing outside the movable control lever of following the contacted axle collar contact site of the axle collar and being constituted to the inboard contact operate portions of protruding of outer cover; One end is fixed on the main coil terminal, and the other end is near the 1st leaf spring switch control lever of contact operate portions; One end is fixed on the heating power supply terminal, and the other end is near the 2nd leaf spring switch control lever of contact operate portions; The terminal part of contact operate portions near the position of the 1st leaf spring switch control lever and the 2nd leaf spring switch control lever on each self-forming push lug boss, push the contact device that lug boss constitutes centrifugal switch on the 1st leaf spring switch control lever, the 2nd leaf spring switch control lever and the movable control lever, it is characterized in that: on the 1st leaf spring switch control lever of centrifugal switch and the 2nd leaf spring switch control lever, be formed with at movable control lever and also can contact the contact projection that movable control lever is pushed lug boss under because of the situation of following the axle collar and wearing and tearing.
2. according to the contact device of claim 1 described centrifugal switch for single-phase induced motor, it is characterized in that contacting the lug boss of pushing of movable control lever in the stroke distances scope of contact projection between movable control lever closure/open position of the 1st, 2 leaf spring switch control levers.
3. according to the contact device of claim 1 or 2 described centrifugal switch for single-phase induced motor, the contact projection that it is characterized in that the 1st, 2 leaf spring switch control levers is that embossing forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410072812 CN1779879B (en) | 2004-11-19 | 2004-11-19 | Contactor of centrifugal switch for single-phase induced motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410072812 CN1779879B (en) | 2004-11-19 | 2004-11-19 | Contactor of centrifugal switch for single-phase induced motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1779879A CN1779879A (en) | 2006-05-31 |
| CN1779879B true CN1779879B (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410072812 Expired - Fee Related CN1779879B (en) | 2004-11-19 | 2004-11-19 | Contactor of centrifugal switch for single-phase induced motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1779879B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296366A (en) * | 1979-10-09 | 1981-10-20 | Emerson Electric Co. | Motor starting switch |
| CN1387668A (en) * | 1999-11-05 | 2002-12-25 | 埃墨森电气公司 | Switch with slotted terminal arm |
| CN1508825A (en) * | 2002-12-13 | 2004-06-30 | 乐金电子(天津)电器有限公司 | Centrifugal switch for single-phase induction machine |
-
2004
- 2004-11-19 CN CN 200410072812 patent/CN1779879B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296366A (en) * | 1979-10-09 | 1981-10-20 | Emerson Electric Co. | Motor starting switch |
| CN1387668A (en) * | 1999-11-05 | 2002-12-25 | 埃墨森电气公司 | Switch with slotted terminal arm |
| CN1508825A (en) * | 2002-12-13 | 2004-06-30 | 乐金电子(天津)电器有限公司 | Centrifugal switch for single-phase induction machine |
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| Publication number | Publication date |
|---|---|
| CN1779879A (en) | 2006-05-31 |
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| PB01 | Publication | ||
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Granted publication date: 20100512 Termination date: 20111119 |