CN2077171U

CN2077171U - Single-phase motor starting switch

Info

Publication number: CN2077171U
Application number: CN 90218378
Authority: CN
Inventors: 李三明
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-28
Filing date: 1990-08-28
Publication date: 1991-05-15

Abstract

A single-phase motor start switch has the function of centrifugal switch in single-phase motor. One form is composed of a start button, a stop button, a journey plate, a start contact point and a group of start contact points controlled by the start button. The other form is composed of a contactor, a start button comprising three contact points, and a stop button. The utility model has the advantages of: the switch can save the centrifugal switch in single-phase motor, but does not change connection mode of original motor. The utility model has the advantages of high reliability and long service life.

Description

Single-phase motor starting switch

The utility model relates to a kind of monophase machine starting switch, and this switch has the centrifugal switch effect of monophase machine inside concurrently.

Monophase machine is in when starting, is the break-make of being controlled the excitation wire bag by the centrifugal switch of motor internal.Because centrifugal switch is in the state of running up once work.And owing to the more high reason of motor internal temperature rise.Centrifugal switch is out of order and causes burning of excitation wire bag.And maintenance is quite difficult.

The purpose of this utility model provides a kind of external mounted starting switch that has the centrifugal switch effect concurrently.

The utility model is realized by following manner:

When electric motor starting, control the break-make of excitation wire bag by starting button, when starting button was pressed, excitation wire bag energized when unclamping starting button, disconnected the power supply of excitation wire bag.This programme can be finished by machinery and two kinds of forms of magnetic force starting.

The structure of mechanical type is: it includes starting button, stop button, stroke sheet, running contact, and particularly it also includes one group of moving contact that rises by starting button control.Running lower contact and starting upper contact are contained in the upper and lower faces of running lower contact insulating trip respectively, and running lower contact insulating trip is supported by lead and spring.

The structure of magnetic force starting form is: it includes Magnetic contactor, and particularly it also includes starting button and stop button, and starting button includes three contacts, and they are connected with power supply, contactor line bag and motor excitation line bag respectively.The contact of starting button contacts three contacts simultaneously.There is a contact supported by spring in three contacts of starting button.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is structural representation of the present utility model (mechanical type)

Fig. 2 is the structural representation of magnetic force start type switch

Fig. 3 is the A-A profile of Fig. 2

Fig. 4 is a switch shown in Figure 1 wiring schematic diagram when using

Fig. 5 is a switch shown in Figure 2 elementary diagram when using

Among the figure, 1. support, 2. stroke sheet, 3. slide block, 4. location lever, 5. stop button, 6. running upper contact brace, 7. stroke sheet clasp, 8. starting button, 9.13.15. spring, 10. starting button bar, 11. running upper contacts, 12. the running lower contact, 14. starting upper contacts, 16. starting lower contacts, 17. leads, 18. casing, 19. contacts of contactor, 20. contactor line bags, 21. the starting button contact, 22. stop button contacts, 23. running lower contact insulating trips.

In Fig. 1, starting button 8 is made up of button, spring 9, starting button bar 10, location lever 4.Running upper contact insulating trip is housed in the lower end of starting button bar 10, two pairs of running upper contacts 11 are housed on running upper contact insulating trip, every pair of running upper contact is connected by running upper contact brace 6.Running lower contact 12 also is two pairs, and is corresponding with the running upper contact respectively, and they are contained on the running lower contact insulating trip 23.In the bottom surface of running lower contact insulating trip 23 starting upper contact 14 is housed, with starting upper contact 14 corresponding positions on starting lower contact 16 is housed.Running lower contact insulating trip 23 is supported by lead 17 and the spring 15 that is enclosed within lead 17 outsides.

In the middle and upper part of support 1 stroke sheet 2 is housed, stroke sheet 2 is fixed on the support 1 by bearing pin, is with spring 13 on the bearing pin on the right.On stroke sheet 2 and position that starting button matches, a gathering sill is arranged, the upper end of gathering sill is provided with stroke sheet clasp 7, and clasp 7 can pin location lever 4.On stroke sheet 2 and position that stop button 5 matches, a gathering sill that is slidingly fitted with slide block 3 is arranged, the more above-mentioned depth as shallow corresponding to the starting button gathering sill of the degree of depth of this gathering sill some.The internal structure of stop button is identical with starting button, and just a slide block 3 is adorned in its bottom.

Use winding diagram such as Fig. 4 of switch shown in Figure 1.The course of work of switch shown in Figure 1 is: press starting button 8, the clasp 7 of location lever 4 compressing stroke sheets 2, force stroke sheet compression spring 13 and move right,, when starting button was pressed on earth, the upper contact that not only turns round all contacted with the running lower contact, and, also force running lower contact insulating trip 23 pressuring springs 15 and moving downward, to starting upper contact 14 is also contacted simultaneously with starting lower contact 16, electric motor starting turns round.When unclamping starting button, running contact 11,12 suitable returns (rising).It is to utilize the bounce of

spring

9,15 and raise, and is pinned by stroke sheet clasp 7 but locate lever 4 simultaneously, can not reposition, so the running still firm contact in contact plays a moving contact and then has been in off-state.

When pressing stop button 5, slide block 3 moves downward, and forces stroke sheet 2 to move backward, and location lever 4 breaks away from clasp 7, and starting button 8 resets, and motor shuts down.

Fig. 2, the 3rd, another embodiment of the present utility model, i.e. magnetic force start type switch.It is on the basis of Magnetic contactor, increases a starting button switch and the stop button switch with three contacts.In Fig. 2, mainly represent general contactor profile.It is by line bag 20, and contact 19 and movable core are formed.Fig. 3 mainly represents the structural representation of starting button and stop button.Starting button mainly is made up of button, spring, three contacts etc., and contact, the centre of three contacts 21 is supported by spring.Contact contacts well with three contacts simultaneously when pressing the button with assurance.Two contacts 22 of stop button are normally-closed contact.

Fig. 5 is to use the elementary diagram of switch shown in Figure 2.Its course of work is as follows: when pressing starting button, and the line bag J of contactor ₁Excitation wire bag while energized with motor.Motor rotation.When unclamping starting button 8, contactor J ₁Can be by the contact self-locking of stop button, the excitation wire bag of motor is deenergization then, and motor shuts down.

The utility model has the advantages that and use this switch can save the centrifugal switch of monophase machine inside, and do not change the mode of connection of original motor. Its reliability ratio centrifugal switch is much higher. Therefore the excitation wire bag of monophase machine is difficult for being burnt. It also has the advantages such as simple in structure, easy to maintenance simultaneously.

Claims

1, a kind of monophase machine starting switch, it includes starting button, stop button, stroke sheet, running contact, it is characterized in that it also includes one group of moving contact that rises by starting button control.

2, starting switch according to claim 1, the lower contact that it is characterized in that turning round is supported by lead and spring with upper and lower faces, the running lower contact insulating trip that the starting upper contact is contained in running lower contact insulating trip respectively.

3, a kind of monophase machine starting switch, it includes Magnetic contactor, it is characterized in that it also includes starting button and stop button, starting button includes three contacts, they are connected with power supply, contactor line bag and motor excitation line bag respectively, and the contact of starting button contacts three contacts simultaneously.

4, starting switch according to claim 3 is characterized in that having a contact supported by spring in three contacts of starting button.