Double-throw double-contact centrifugal switch for single-phase motor
By designing a double-throw, double-contact centrifugal switch for a single-phase motor, and controlling the capacitance conversion of the capacitors between three sets of conductive electrode plates through the double-throw, double-contact centrifugal switch when the motor speed reaches a certain value, the capacitance conversion of the motor and the capacitors is realized.
Patent Information
- Application Number
- CN202520085492.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-14
AI Technical Summary
The existing starting control methods for single-phase dual-value capacitor motors cannot meet the requirements of new capacitors, especially when the motor speed reaches a certain value, they cannot effectively switch the series and parallel states of the capacitors.
Design a double-throw double-contact centrifugal switch for single-phase motors. When the motor speed reaches a certain value, the double-throw double-contact centrifugal switch controls the series and parallel switching between three sets of conductive electrode plates to realize the capacitance conversion of the capacitor.
It enables a simple and reliable switching between the motor starting capacitor and the running capacitor, meeting the working requirements of a single-phase dual-value capacitor motor.
Smart Images
Figure CN223728676U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field especially is related to a single -phase motor is with two throw double contact centrifugal switch. BACKGROUND
[0002] Single -phase double -value capacitor motor is a kind of common motor type, mainly by stator, rotor, capacitor etc. The working principle of the motor is based on the rotating magnetic field generated in the magnetic circuit of stator, the shaft in rotor follows rotation, and power is transmitted to output shaft through bearing and slip ring. Since the phase of current can be changed by capacitor, the speed of motor can be adjusted to meet different use requirements. Single -phase double -value capacitor motor has universal application in household appliances, mechanical equipment and industrial equipment field.
[0003] In the starting stage of single -phase double -value capacitor motor, there are two control methods, one is through certain speed detection control circuit, makes motor speed reach predetermined speed, control relay action, and the cut-off of single -phase double -value capacitor motor starting capacitor (CD60 aluminum electrolytic capacitor) is completed by relay contact; mechanical one-way centrifugal switch is another switch for controlling motor starting, its role is that when motor reaches certain speed, shaft sleeve centrifugal device opens centrifugal switch by centrifugal force, and single -phase motor mechanical one-way centrifugal switch is cut off starting capacitor (CD60 aluminum electrolytic capacitor). The structure of the centrifugal switch usually includes centrifugal mechanism, contact and spring etc. The centrifugal mechanism is installed at one end of motor rotor, the contact is composed of fixed contact and movable contact, the fixed contact is fixed on the mounting base, and the movable contact is connected with the centrifugal mechanism. Spring is used to keep the contact between movable contact and fixed contact, and the action principle of motor centrifugal switch is based on the action of centrifugal force. When motor starts, rotor starts to rotate, centrifugal mechanism rotates with the rotation, and with the increase of rotation speed, centrifugal force also increases, when centrifugal force reaches the set value, centrifugal mechanism will move outward, so that movable contact and fixed contact are separated, and power supply is disconnected.
[0004] The above two control methods cannot meet the use requirements of single -phase double -value capacitor motor for new capacitor, the utility model provides a kind of single -phase motor is with two throw double contact centrifugal switch, can carry out the series, parallel conversion between three groups of conductive plates, to meet the requirements of single -phase double -value capacitor motor to the starting and running use of new capacitor during work. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of single -phase motor is with two throw double contact centrifugal switch, which can control the series, parallel between three groups of conductive plates by two throw double contact centrifugal switch, effectively switch the starting capacitor and running capacitor of single -phase double -value capacitor motor, and the control mode is simple and reliable.
[0006] The utility model provides a kind of double-throw double-contact centrifugal switch for single-phase motor, comprising: installation bottom plate, card in motor one side end cover, the installation bottom plate is U-shaped, its open end two sides are provided with first moving contact spring and second moving contact spring, the middle part of the groove bottom of the installation bottom plate is provided with first, second static contact fixed sheet, first, second static contact fixed sheet with the two sides of the installation bottom plate is provided with first moving contact limit frame, third static contact fixed sheet, first static contact is electrically connected with first, second static contact fixed sheet by the moving contact limit frame, first static contact and second static contact are installed in connecting piece both ends, first moving contact spring and second moving contact spring are all equipped with hemisphere sliding point and centrifugal mechanism of centrifugal machine sliding connection, the inside of the first moving contact spring is connected with first moving contact, the inside of the second moving contact spring is connected with second moving contact, wherein, second moving contact is arranged between second static contact and third static contact, can be switched between the two, when motor reaches certain rotating speed, centrifugal mechanism of centrifugal machine generates displacement, makes the first moving contact spring and the second moving contact spring pop up, changes each contact state, makes capacitor change from starting state to running state.
[0007] Preferably, one end of the first moving contact spring is fixedly connected with one side of the open end of the installation bottom plate after bending, the other end extends to the groove bottom of the installation bottom plate, and the end is arc-bent and slidably connected with one side of the moving contact limit frame; one end of the second moving contact spring is fixedly connected with the other side of the open end of the installation bottom plate after bending, and the other end extends to the groove bottom of the installation bottom plate, and the end is arc-bent and slidably connected with the other side of the moving contact limit frame.
[0008] Preferably, the first static contact fixed sheet extends to the open end of the installation bottom plate and is fixedly connected with the middle part of the moving contact limit frame, one end of the moving contact limit frame is fixedly connected with one side of the installation bottom plate, and the other end is fixedly connected with the second static contact fixed sheet.
[0009] Preferably, static contact leading ends are arranged on the first, second static contact fixed sheets and the third static contact fixed sheet, and the two static contact leading ends are connected to the motor terminal plate through leading wires.
[0010] Preferably, a first moving contact leading end is arranged on the first moving contact spring, a second moving contact leading end is arranged on the second moving contact spring, and the first moving contact spring and the second moving contact spring are connected to the motor terminal plate through leading wires.
[0011] Preferably, the static contact lead-out end, the first dynamic contact lead-out end and the second dynamic contact spring plate are all cross bolts and nuts, which are connected with three groups of conductive electrode plates of the capacitor through wires and the motor terminal plate, and the capacity conversion of the capacitor is realized through series and parallel control.
[0012] Preferably, the first dynamic contact spring plate and the second dynamic contact spring plate are both conductive metal plates with elasticity.
[0013] Preferably, the first dynamic contact spring plate and the second dynamic contact spring plate are fixedly connected with the mounting bottom plate through gaskets and fastening screws.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] Through the double-throw double-contact centrifugal switch installed on the one side end cover of the motor, the contact control signal is led to the motor terminal plate, which is used for controlling the series and parallel capacity conversion between the three groups of conductive electrode plates, and the closing and opening between the dynamic contact and the static contact rely on the motor starting, when the motor speed reaches a certain speed, the centrifugal device on the shaft will throw off the double-throw double-contact centrifugal switch, so as to achieve the purpose of power-off and conversion between the conductive electrode plates, thereby effectively switching the starting capacitor and the running capacitor of the motor, and the control mode is simple and reliable. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0017] Figure 1 It is a front structure schematic view of the centrifugal switch of the utility model;
[0018] Figure 2 It is a back structure schematic view of the centrifugal switch of the utility model;
[0019] MARKED FOR EXPLANATION:
[0020] 1: mounting bottom plate;2: first dynamic contact spring plate;3: second dynamic contact spring plate;4: first and second static contact fixed plate;5: dynamic contact limiting frame;6: third static contact fixed plate;7: first static contact;8: connecting plate;9: second static contact;10: first dynamic contact;11: second dynamic contact;12: third static contact;13: gasket;14: fastening screw;15: static contact lead-out end;16: first dynamic contact lead-out end;17: second dynamic contact lead-out end;18: hemispherical sliding point. DETAILED DESCRIPTION
[0021] The technical solutions of the present application will be described clearly and completely in combination with the embodiments. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0022] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0023] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0024] As Figure 1 , 2As shown, the utility model provides a kind of double-throw double-contact centrifugal switch for single-phase motor, comprising: installation bottom plate 1, installation bottom plate 1 is U-shaped, set on the one side end cover of motor, and with the centrifugal mechanism cooperation contact use of centrifugal ware, its open end two sides are respectively provided with first movable contact spring 2 and second movable contact spring 3, the middle part of the groove bottom of installation bottom plate 1 is provided with first, second stationary contact fixed piece 4, first, second stationary contact fixed piece 4 with the two sides of installation bottom plate 1 is provided with movable contact limiting frame 5, one end of movable contact limiting frame 5 is provided with third stationary contact fixed piece 6, first stationary contact 7 is electrically connected with first, second stationary contact fixed piece 4 and third stationary contact fixed piece 6 by movable contact limiting frame 5, first stationary contact 7 is connected with second stationary contact 9 by connecting piece 8, connecting piece 8 is stepped metal piece, can make first stationary contact 7 and second stationary contact 9 be located at different height positions. The end of first movable contact spring 2 and second movable contact spring 3 is slidably connected with movable contact limiting frame 5, the inside of first movable contact spring 2 is connected with first movable contact 10, the inside of second movable contact spring 3 is connected with second movable contact 11, wherein, second movable contact 11 is set between first stationary contact 7 and third stationary contact 12, can be switched between them under the centrifugal effect after motor rotation.When the rotational speed of motor reaches 70%-80% of rated speed, the centrifugal mechanism of centrifugal ware on shaft sleeve is displaced, first movable contact spring 2 and second movable contact spring 3 are bounced up under the inertia of centrifugal mechanism, first movable contact 10 is disconnected with second stationary contact 9, second movable contact 11 is disconnected with third stationary contact 12, second movable contact 11 is contacted with first stationary contact 7 by the bouncing of second movable contact spring 3, so as to realize the capacitance conversion between three sets of conductive plates of capacitor from starting state to running state.
[0025] Specifically, one end of first movable contact spring 2 is fixedly connected with one side of the open end of installation bottom plate 1 after bending, the other end extends to the groove bottom of installation bottom plate 1, and the end is slidably connected with the left side of movable contact limiting frame 5 after being curved in arc shape; one end of second movable contact spring 3 is fixedly connected with the other side of the open end of installation bottom plate 1 after bending, the other end extends to the groove bottom of installation bottom plate 1, and the end is slidably connected with the right side of movable contact limiting frame 5 after being curved in arc shape. Through the shape design of first movable contact spring 2 and second movable contact spring 3, it can be clamped outside the shaft sleeve of motor output shaft. And first movable contact spring 2 and second movable contact spring 3 are both conductive metal sheets with elasticity, and are fixedly connected with installation bottom plate 1 by gasket 13 and fastening screw 14. When the rotational speed of motor reaches 70%-80% of rated speed, the end of first movable contact spring 2 and second movable contact spring 3 can move linearly along movable contact limiting frame 5 under the displacement of centrifugal mechanism of centrifugal ware, at this time, first movable contact spring 2 and second movable contact spring 3 are deformed, drive first movable contact 10 and second movable contact 11 to move, realize the switching between first stationary contact 7, second stationary contact 9 and third stationary contact 12.
[0026] The first and second static contact fixing pieces 4 extend to the opening end of the mounting base plate 1 and are fixedly connected with the middle part of the dynamic contact limiting frame 5, one end of the dynamic contact limiting frame 5 is fixedly connected with one side of the mounting base plate 1, and the other end is fixedly connected with the third static contact fixing piece 6. The first static contact fixing piece 4 and the second static contact fixing piece 6 are fixedly connected with the mounting base plate 1 through fastening screws 14. The first static contact fixing piece 4 and the third static contact fixing piece 6 are both provided with static contact leading ends 15, and the two static contact leading ends 15 are connected to the motor terminal plate through leading wires.
[0027] The first dynamic contact spring piece 2 is provided with a first dynamic contact leading end 16, and the second dynamic contact spring piece 3 is provided with a second dynamic contact leading end 17, and the first dynamic contact leading end 16 and the second dynamic contact spring piece 17 are connected to the motor terminal plate through leading wires. The static contact leading end 15, the first dynamic contact leading end 16 and the second dynamic contact spring piece 17 are all cross bolts and nuts, which are respectively connected with three groups of conductive electrode plates of the starting capacitor of the motor through wires and the motor terminal plate, and the capacity conversion of the capacitor is realized through series and parallel connection control.
[0028] The first dynamic contact spring piece 2 and the second dynamic contact spring piece 3 are both provided with a hemispherical sliding point 18, which is in smooth contact with the surface of the centrifugal mechanism of the centrifugal device, so that the dynamic contact and the static contact can be smoothly disconnected and contacted.
[0029] The working principle of the centrifugal switch is as follows:
[0030] Before the motor is powered, the first dynamic contact 10 and the second static contact 9, and the second dynamic contact 11 and the third static contact 12 are in a closed state, and the capacitance between the three groups of conductive electrode plates is in a starting state; after the motor is powered, when the motor speed reaches 70%-80% of the rated speed, the centrifugal mechanism of the centrifugal device on the shaft sleeve is displaced, the first dynamic contact spring piece 2 and the second dynamic contact spring piece 3 are lifted, the first dynamic contact 10 and the second dynamic contact 11 are lifted, the first dynamic contact 10 is disconnected from the second static contact 9, the second dynamic contact 11 is disconnected from the third static contact 12, and the second dynamic contact 11 is connected to the first static contact 7 through the lifting of the second dynamic contact spring piece 3, so that the capacitance of the three groups of conductive electrode plates is converted from the starting state to the running state.
[0031] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A double throw double contact centrifugal switch for single phase motors, characterized by, The application relates to a capacitor with a capacity conversion function. The installation base plate is arranged on the side end cover of the motor, the installation base plate is in a U shape, the opening end of the installation base plate is provided with a first movable contact spring and a second movable contact spring, the middle part of the groove bottom of the installation base plate is provided with a first static contact fixed sheet and a second static contact fixed sheet, the first static contact fixed sheet and the second static contact fixed sheet are provided with a first movable contact limiting frame and a third static contact fixed sheet between the two sides of the installation base plate, the first static contact is electrically connected with the first static contact fixed sheet and the second static contact fixed sheet through the movable contact limiting frame, the first static contact and the second static contact are arranged at the two ends of the connecting sheet, the first movable contact spring and the second movable contact spring are provided with a hemispherical sliding point which is in sliding connection with a centrifugal mechanism of a centrifugal device, the inner side of the first movable contact spring is connected with a first movable contact, and the inner side of the second movable contact spring is connected with a second movable contact, wherein the second movable contact is arranged between the second static contact and the third static contact and can be switched between the two, when the motor reaches a certain rotating speed, the centrifugal mechanism of the centrifugal device is displaced, the first movable contact spring and the second movable contact spring are lifted, the contact state of each contact is changed, and the capacitor is converted from a starting state to a running state.
2. The dual throw double contact centrifugal switch for single phase motors as set forth in claim 1, wherein, One end of the first movable contact spring is fixedly connected with one side of the opening end of the installation base plate after being bent, the other end of the first movable contact spring extends to the groove bottom of the installation base plate, and the tail end of the first movable contact spring is in sliding connection with one side of the movable contact limiting frame after being bent in an arc shape; one end of the second movable contact spring is fixedly connected with the other side of the opening end of the installation base plate after being bent, the other end of the second movable contact spring extends to the groove bottom of the installation base plate, and the tail end of the second movable contact spring is in sliding connection with the other side of the movable contact limiting frame after being bent in an arc shape.
3. The dual throw double contact centrifugal switch for single phase motors as set forth in claim 1, wherein, The first static contact fixed sheet and the second static contact fixed sheet extend to the opening end of the installation base plate and are fixedly connected with the middle part of the movable contact limiting frame, one end of the movable contact limiting frame is fixedly connected with one side of the installation base plate, and the other end of the movable contact limiting frame is fixedly connected with the third static contact fixed sheet.
4. The dual throw double contact centrifugal switch for a single phase motor according to claim 1, wherein, The first static contact fixed sheet, the second static contact fixed sheet and the third static contact fixed sheet are all provided with static contact leading ends, and the two static contact leading ends are connected to the motor terminal plate through leading wires.
5. The double throw double contact centrifugal switch for single phase motors as set forth in claim 4, wherein, The first movable contact spring is provided with a first movable contact leading end, the second movable contact spring is provided with a second movable contact leading end, and the first movable contact spring and the second movable contact spring are both connected to the motor terminal plate through leading wires.
6. The double throw double contact centrifugal switch for single phase motors as set forth in claim 5, wherein, The static contact leading end, the first movable contact leading end and the second movable contact spring are all cross bolts and nuts, which are connected with three groups of conductive electrode plates of the capacitor through wires and the motor terminal plate, and the capacity conversion of the capacitor is realized through series connection and parallel connection control.
7. The dual throw double contact centrifugal switch for a single phase motor according to claim 1, wherein, The first movable contact spring and the second movable contact spring are both conductive metal sheets with elasticity.
8. The double throw double contact centrifugal switch for single phase motors as set forth in claim 7, wherein, The first movable contact spring and the second movable contact spring are both fixedly connected with the installation base plate through gaskets and fastening screws.