CN2083330U - Electromagnetic switch - Google Patents
Electromagnetic switch Download PDFInfo
- Publication number
- CN2083330U CN2083330U CN 91204325 CN91204325U CN2083330U CN 2083330 U CN2083330 U CN 2083330U CN 91204325 CN91204325 CN 91204325 CN 91204325 U CN91204325 U CN 91204325U CN 2083330 U CN2083330 U CN 2083330U
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- China
- Prior art keywords
- contact
- fixed
- connecting rod
- moving
- electromagnetic
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Abstract
The utility model relates to an electromagnetic switch for controlling the motor of a machine tool, comprising a fixing bracket 4 and an electromagnetic system. The electromagnetic switch for controlling the motor of a machine tool is characterized in that a contact system is arranged on one side of the electromagnetic system. Each moving contact 12 is fixed on a draw rod 9, and each static contact 11 is fixed on a contact seat 16. A moving iron core 3 and the draw rod 9 are respectively fixed on both ends of a connecting rod 7. When the moving iron core 3 is pressed down, the draw rod 9 can be lifted, thereby, the moving contact and the static contact are closed, a motor runs, a loop is put through. An electromagnetic coil forms closing, and the contact system is in a self-preservation state. The electromagnetic switch for controlling the motor of a machine tool can directly start loads, and can be automatically released under the states of under voltage and losing voltage to cut a power supply. The defect of the control switch of the existing machine tool is effectively overcome.
Description
The utility model relates to the special-purpose control element of lathe, and a kind of current collection magnetic relay and contact system are the electromagnetic switch of one.
Have the Machine-Tool Control switch now, generally adopt the latching switch of mechanical self-latching mode, for example LY3 type latching switch, its operating current is little, can only be as control element, and can not the across-the-line starting load, the for example work of machine motor has only by A.C. contactor and could realize control to load.Especially such Machine-Tool Control switch does not have the decompression coil, works as power cut-off, and switch can not be cut off the electricity supply automatically, and its result causes the generation of lathe accident easily.
The purpose of this utility model provides a kind of novel electromagnetic switch, it can across-the-line starting load ， And can under under-voltage, decompression state, can discharge automatically, thereby cut off the electricity supply automatically.
For achieving the above object, the technical solution of taking is: at electromagnetic system a contact system that is used for control load (for example motor) starting and self-insurance is set on one side, electromagnetic system is made up of static iron core, moving iron core and solenoid, and contact system and electromagnetic system are fixed on the support in the lump.Contact system is provided with two groups or three groups of moving contacts and fixed contact, as the main contact group of starting two-phase electric machine or three phase electric machine.Each group moving contact is fixed on the pull bar, each fixed contact is fixed on the contact base, when carrying on the pull bar, dynamic/static contact is in closure state.The connecting rod two ends ， And that moving iron core in the electromagnetic system and pull bar is separately fixed at a linkage is actively set on connecting rod on the connecting rod rack.The effect of connecting rod is when the moving iron core stiff end of connecting rod is depressed, the pull bar stiff end of connecting rod can on carry, make dynamic/static contact closure in the contact system.The pull bar of connecting rod is fixed an end back-moving spring is set, and an end of back-moving spring is connected with connecting rod, and the other end is fixed on the contact base.Its effect is when electromagnetic system is in release condition, and pull bar automatically resets.Be provided with starting button directly over the moving iron core stiff end of connecting rod, be provided with stop button directly over the pull bar stiff end of connecting rod, two buttons stretch out outside the switch case.
During use, with the terminal blocks of two lead-in wires of solenoid respectively with out of phase two fixed contacts of contact system main contact group (see figure 2) that links together, each fixed contact of main contact group is serially connected in each phase inlet wire of motor.When depressing " starting button ", because the effect of connecting rod, carry on the pull bar, each dynamic/static contact closure, solenoid is switched on thereupon, form the closed-loop path, the adhesive of sound iron core, starting button resets, and this moment is because the sound iron core of electromagnetic system still is in attracting state, so contact system also is in the self-insurance state, motor runs well.When operation " stop button ", because artificial pressure moves down pull bar, dynamic/static contact separates thereupon, and the self-keeping circuit destroys, and electromagnetic system discharges, and moving contact resets under action of reset spring, and motor shuts down.When power cut-off or power failure, electromagnetic system is in under-voltage or the decompression state, the sound iron core discharges, and moving contact resets under the effect of back-moving spring, separates with fixed contact, motor shuts down, in case even the power up normal power supply, because not adhesive automatically of contact system, motor still can not turn round, have only again when pressing " starting button ", can turn round.
Because the utility model adopts said structure, make this electromagnet switch not only can across-the-line starting load (motor) work, and can be under under-voltage or decompression operating state, automatically quit work, just often can not resume work automatically at service restoration, thereby improved the fail safe of using, overcome the defective of existing machine tool control switch effectively.
Fig. 1 is the structural representation of a kind of embodiment of the utility model.Among the figure, 1 static iron core, 2 solenoids, 3 moving iron cores, 4 fixed supports, 5 stop buttons, 6 starting buttons, 7 connecting rods, 8 connecting rod racks, 9 pull bars, 10 springs, 11 fixed contacts, 12 moving contacts, 13 auxiliary moving contacts, 14 auxiliary fixed contacts, 15 solenoid terminal blocks, 16 contact bases.
This embodiment is the electromagnetic switch of a control three-phase machine motor, in the contact system except that three groups of dynamic/static contacts (12,11) are set, one group of auxiliary moving contact 13 and auxiliary fixed contact 14 also are set, moving contact 13 is fixed on the pull bar 9, auxiliary contact can be used for the control of work light, is easy-to-connect, arranges rationally, the terminal block 15 of the solenoid 3 among the embodiment passes contact base, places side by side successively with fixed contact.
Claims (3)
1, a kind of electromagnetic switch that is used for machine motor control, comprise fixed support 4 and electromagnetic system, electromagnetic system is by static iron core 1, moving iron core 3 and solenoid 2 are formed, it is characterized in that unifying the contact system that side is provided with control electric motor starting and self-insurance at electromagnetic system, this contact system and electromagnetic system are fixed on the support 4 in the lump, contact system is provided with two groups or three groups of fixed contacts 11 and moving contact 12, each moving contact 12 is fixed on the pull bar 9, each fixed contact 11 is fixed on the contact base 16, when carrying on the pull bar, dynamic/static contact is in closure state, moving iron core 3 and pull bar 9 are separately fixed at the two ends of the connecting rod 7 of linkage, connecting rod 7 is actively set on the connecting rod rack 8, when the moving iron core stiff end of connecting rod is depressed, the pull bar stiff end of connecting rod can on carry, the pull bar of connecting rod is fixed an end back-moving spring 10 is set, one end of back-moving spring 10 is connected with connecting rod, the other end is fixed on the contact base 16, directly over the moving iron core stiff end of connecting rod, be provided with starting button 6, being provided with stop button 5, two buttons directly over the pull bar stiff end of connecting rod stretches out outside the switch case.
2, electromagnetic switch according to claim 1 is characterized in that the terminal block 15 of solenoid 3 passes contact base, places side by side successively with fixed contact.
3, electromagnetic switch according to claim 1 and 2 is characterized in that also being provided with in the contact system one group of auxiliary moving contact 13 and auxiliary fixed contact 14, and moving contact 13 is fixed on the pull bar 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91204325 CN2083330U (en) | 1991-03-27 | 1991-03-27 | Electromagnetic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91204325 CN2083330U (en) | 1991-03-27 | 1991-03-27 | Electromagnetic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2083330U true CN2083330U (en) | 1991-08-21 |
Family
ID=4914453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91204325 Withdrawn CN2083330U (en) | 1991-03-27 | 1991-03-27 | Electromagnetic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2083330U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461324C (en) * | 2003-07-10 | 2009-02-11 | 西门子公司 | Electromagnetic switching device |
-
1991
- 1991-03-27 CN CN 91204325 patent/CN2083330U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461324C (en) * | 2003-07-10 | 2009-02-11 | 西门子公司 | Electromagnetic switching device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |