CN105575738A - Power supply thermal relay - Google Patents
Power supply thermal relay Download PDFInfo
- Publication number
- CN105575738A CN105575738A CN201610057919.3A CN201610057919A CN105575738A CN 105575738 A CN105575738 A CN 105575738A CN 201610057919 A CN201610057919 A CN 201610057919A CN 105575738 A CN105575738 A CN 105575738A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- moving contact
- bimetal leaf
- support bar
- electrical relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
- H01H71/164—Heating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/58—Manual reset mechanisms which may be also used for manual release actuated by push-button, pull-knob, or slide
Abstract
The invention discloses a power supply thermal relay. The power supply thermal relay comprises bimetallic sheets, heating resistance wires, a guide plate and a bent arm, wherein the heating resistance wires are wound outside the bimetallic sheets, the guide plate is arranged at the bottoms of the bimetallic sheets, the bimetallic sheets are in transmission connection with the guide plate, the bent arm is arranged on one side of the guide plate, a support rod is arranged outside the bent arm, the bent arm is hinged with the support rod, a knob is arranged on the support rod, a static contact is arranged below the support rod, a movable contact is arranged on one side of the bent arm, an adjustment screw and a spring are arranged outside the movable contact, and a reset knob is further arranged on one side of the movable contact. The power supply thermal relay is compact in structure, is convenient to adjust, and has a favorable overload protection function.
Description
Technical field
The present invention relates to a kind of for thermal electrical relay.
Background technology
Thermal relay is the protective device of the overload protection for motor or other electric equipment, electric wiring.
Motor, in actual motion, carries out in the course of work as dragged manufacturing machine, if machinery occurs that abnormal situation or circuit abnormality make motor run into overload, then the electric current in motor speed decline, winding will increase, and the winding temperature of motor is raised.If overload current is little and the time that is overload is shorter, motor winding is no more than permission temperature rise, and this overload allows.If but overload time is long, overload current is large, and the temperature rise of motor winding will exceed permissible value, makes motor winding aging, shortens the useful life of motor, even can make motor winding time serious.So this overload is that motor can not bear.Thermal relay is exactly the thermal effect principle utilizing electric current, cuts off motor circuit, for motor provides the protective device of overload protection when there is the overload that motor can not bear.
When using thermal relay to carry out overload protection to motor; thermal element is connected with the stator winding of motor; the normally closed interlock of thermal relay is connected in the control circuit of the solenoid of A.C. contactor; and regulate setting current adjusting knob, make herringbone driving lever and push rod at a distance of a suitable distance.When electric motor normal working, be the rated current of motor by the electric current of thermal element, thermal element generates heat, bending after bimetal leaf is heated, and push rod is just contacted with herringbone driving lever, and can not promote herringbone driving lever.Normally closed interlock is in closure state, and A.C. contactor keeps adhesive, and motor normally runs.
Current existing poor for thermal electrical relay structural stability, regulate inconvenient, security performance is unreliable.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of compact conformation, easy to adjust, and what have good overload protection function supplies thermal electrical relay.
For solving the problem, the present invention adopts following technical scheme: a kind of for thermal electrical relay, comprise bimetal leaf, heating resistance wire, guide plate and Abduction arm, described heating resistance wire is wrapped in outside bimetal leaf, described guide plate is located at bottom bimetal leaf, described bimetal leaf and guide plate are in transmission connection, described Abduction arm is located at guide plate side, described Abduction arm arranged outside has support bar, described Abduction arm and support bar hinged, described support bar is provided with knob, fixed contact is provided with below described support bar, described Abduction arm side is provided with moving contact, described moving contact arranged outside has adjustment screw and spring, described moving contact side is also provided with reset button.
As preferably, described bimetal leaf is provided with two panels, during bimetal leaf expanded by heating, can produce flexural deformation, promotes guide plate
As preferably, described adjustment screw is threaded with moving contact, the convenient position regulating moving contact.
As preferably, described spring is fixedly connected with moving contact, holding structure stable connection.
As preferably, described fixed contact and moving contact are corresponding setting, and circuit connects smooth and easy.
Beneficial effect of the present invention is: the heating resistance wire of setting is when current overload, producing heat makes bimetal leaf bending displacement increase, promote guide plate to make Abduction arm moves, spring pull-up moving contact disconnects, cut off circuit, support bar can keep Abduction arm slow-roll stabilization reliable, and adjustment screw is convenient regulates moving contact position, keep use safety, reset button conveniently carries out hand-reset.
Accompanying drawing explanation
Fig. 1 is a kind of overall structure schematic diagram for thermal electrical relay of the present invention.
Embodiment
As shown in Figure 1, a kind of for thermal electrical relay, comprise bimetal leaf 1, heating resistance wire 2, guide plate 3 and Abduction arm 4, described heating resistance wire 2 is wrapped in outside bimetal leaf 1, described guide plate 3 is located at bottom bimetal leaf 1, described bimetal leaf 1 is in transmission connection with guide plate 3, described Abduction arm 4 is located at guide plate 3 side, described Abduction arm 4 arranged outside has support bar 5, described Abduction arm 4 is hinged with support bar 5, described support bar 5 is provided with knob 6, fixed contact 7 is provided with below described support bar 5, described Abduction arm 4 side is provided with moving contact 8, described moving contact 8 arranged outside has adjustment screw 9 and spring 10, described moving contact 8 side is also provided with reset button 11.
Described bimetal leaf 1 is provided with two panels.
Described adjustment screw 9 is threaded with moving contact 8.
Described spring 10 is fixedly connected with moving contact 8.
Described fixed contact 7 is arranged in corresponding with moving contact 8.
Beneficial effect of the present invention is: the heating resistance wire of setting is when current overload, producing heat makes bimetal leaf bending displacement increase, promote guide plate to make Abduction arm moves, spring pull-up moving contact disconnects, cut off circuit, support bar can keep Abduction arm slow-roll stabilization reliable, and adjustment screw is convenient regulates moving contact position, keep use safety, reset button conveniently carries out hand-reset.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any change of expecting without creative work or replacement, all should be encompassed within protection scope of the present invention.
Claims (5)
1. one kind supplies thermal electrical relay, it is characterized in that: comprise bimetal leaf, heating resistance wire, guide plate and Abduction arm, described heating resistance wire is wrapped in outside bimetal leaf, described guide plate is located at bottom bimetal leaf, described bimetal leaf and guide plate are in transmission connection, described Abduction arm is located at guide plate side, described Abduction arm arranged outside has support bar, described Abduction arm and support bar hinged, described support bar is provided with knob, fixed contact is provided with below described support bar, described Abduction arm side is provided with moving contact, described moving contact arranged outside has adjustment screw and spring, described moving contact side is also provided with reset button.
2. according to claim 1 for thermal electrical relay, it is characterized in that: described bimetal leaf is provided with two panels.
3. according to claim 1 for thermal electrical relay, it is characterized in that: described adjustment screw is threaded with moving contact.
4. according to claim 1 for thermal electrical relay, it is characterized in that: described spring is fixedly connected with moving contact.
5. according to claim 1 for thermal electrical relay, it is characterized in that: described fixed contact and moving contact are corresponding setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057919.3A CN105575738A (en) | 2016-01-28 | 2016-01-28 | Power supply thermal relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057919.3A CN105575738A (en) | 2016-01-28 | 2016-01-28 | Power supply thermal relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105575738A true CN105575738A (en) | 2016-05-11 |
Family
ID=55885758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610057919.3A Pending CN105575738A (en) | 2016-01-28 | 2016-01-28 | Power supply thermal relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105575738A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449282A (en) * | 2016-10-22 | 2017-02-22 | 钟贵洪 | Thermal relay structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0809270A2 (en) * | 1996-05-22 | 1997-11-26 | Fuji Electric Co. Ltd. | Reversing spring contact switching mechanism and thermal overload relay |
| CN103871778A (en) * | 2014-03-27 | 2014-06-18 | 福州大学 | Application of memory alloy to overload release |
| CN205542658U (en) * | 2016-01-28 | 2016-08-31 | 浙江大学 | Supply thermal electrical relay |
-
2016
- 2016-01-28 CN CN201610057919.3A patent/CN105575738A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0809270A2 (en) * | 1996-05-22 | 1997-11-26 | Fuji Electric Co. Ltd. | Reversing spring contact switching mechanism and thermal overload relay |
| CN103871778A (en) * | 2014-03-27 | 2014-06-18 | 福州大学 | Application of memory alloy to overload release |
| CN205542658U (en) * | 2016-01-28 | 2016-08-31 | 浙江大学 | Supply thermal electrical relay |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449282A (en) * | 2016-10-22 | 2017-02-22 | 钟贵洪 | Thermal relay structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |