CN207966857U - A kind of New-type electric machine overcurrent overheat protector - Google Patents

A kind of New-type electric machine overcurrent overheat protector Download PDF

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Publication number
CN207966857U
CN207966857U CN201721875019.6U CN201721875019U CN207966857U CN 207966857 U CN207966857 U CN 207966857U CN 201721875019 U CN201721875019 U CN 201721875019U CN 207966857 U CN207966857 U CN 207966857U
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CN
China
Prior art keywords
plate
thrermostatic bimetal
metal shell
metal
ptc heater
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CN201721875019.6U
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Chinese (zh)
Inventor
朱天兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saiertan Wuxi Electronics Co ltd
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Yangzhou Debao Electrical Technology Co Ltd
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Priority to CN201721875019.6U priority Critical patent/CN207966857U/en
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Abstract

The utility model discloses a kind of New-type electric machine overcurrent overheat protectors in motor field,Including hollow metal shell,Felt pad is provided in metal shell,Felt pad is internally provided with metal base plate,Felt pad keeps apart metal base plate and metal shell,PTC heater elements and stationary contact are provided on metal base plate,The top of PTC heater elements, which is located in metal shell, is provided with thrermostatic bimetal-plate,One end of thrermostatic bimetal-plate is welded with connection iron nail,Connection iron nail is welded on metal shell,The other end is provided with the movable contact with stationary contact point contact,U-type groove is offered in the middle part of thrermostatic bimetal-plate,So that the middle part of thrermostatic bimetal-plate forms spatula,The heated rear both ends of thrermostatic bimetal-plate are flipped up deformation and movable contact are made to be detached from stationary contact,Spatula moves downward conflict on PTC heater elements simultaneously,The utility model makes thrermostatic bimetal-plate triggering state be maintained by the way that PTC heater element heating powers are arranged in metal shell,To improve reliability when motor work,It can be used in motor.

Description

A kind of New-type electric machine overcurrent overheat protector
Technical field
The utility model is related to a kind of motor, more particularly to a kind of over current of motor, overheat protector.
Background technology
The effect of motor protecter is comprehensively protected to motor, overload, overcurrent, phase shortage, stall, short occurs in motor When road, overvoltage, under-voltage, electric leakage, three-phase imbalance, overheat, bearing wear, rotor bias, the device being alarmed or protected. Existing motor protecter generally uses bimetal leaf overcurrent, overheat or overcurrent and overheating protection design, when thrermostatic bimetal-plate When temperature is more than triggering temperature, thermo bimetal's sector-meeting deforms upon, and to disconnecting circuit, completes protection, disadvantage is that, Since power-off can lead to the reduction of thrermostatic bimetal-plate environment temperature, to when temperature drops to reset temperature, thermo bimetal's sector-meeting Circuit is continued to turn on, so that there are some potential safety problemss for circuit, and causes the waste of electric energy.
Utility model content
The purpose of this utility model is to provide a kind of New-type electric machine overcurrent overheat protector so that motor breaking more may be used It leans on.
What the purpose of this utility model was realized in:A kind of New-type electric machine overcurrent overheat protector, including hollow gold Belong to shell, is provided with felt pad in the metal shell, the felt pad is internally provided with metal base plate, and the felt pad will be golden Belong to bottom plate and metal shell is kept apart, PTC heater elements and stationary contact, the PTC fevers member are provided on the metal base plate The top of part, which is located in metal shell, is provided with thrermostatic bimetal-plate, and one end of the thrermostatic bimetal-plate is welded with connection iron nail, even It connects iron nail to be welded on metal shell, the other end is provided with the movable contact with the stationary contact point contact, the thrermostatic bimetal-plate Middle part offers U-type groove so that the middle part of thrermostatic bimetal-plate forms spatula, and both ends are to turning over after the thrermostatic bimetal-plate is heated Turning deformation makes movable contact be detached from stationary contact, while spatula moves downward conflict on PTC heater elements.
When utility model works, the electric current in major loop flows through metal shell → connection iron nail → thrermostatic bimetal-plate → dynamic Contact → stationary contact → metal base plate, to be formed into a loop, when motor breaks down, winding temperature increases, flows through hot pair at this time The electric current of sheet metal(It changes)The temperature for increasing, causing thrermostatic bimetal-plate changes, and reaches the triggering of thrermostatic bimetal-plate Temperature, thrermostatic bimetal-plate deform upon so that both ends are flipped up, since one end of thrermostatic bimetal-plate is fixedly connected on metal On shell, the one end for being provided with movable contact at this time moves upwards so that movable contact leaves stationary contact, and protection electricity is played in realization open circuit The effect on road;At the same time, the spatula in the middle part of thrermostatic bimetal-plate is set and moves downward conflict on PTC heater elements, it is main The electric current flowing in circuit becomes:Metal shell → thrermostatic bimetal-plate → PTC heater elements → metal base plate so that PTC fever members Part is in heating power state, and PTC heater elements may be regarded as super large resistance at this time, and major loop, which is appointed, is in off state, due to PTC Heater element, which is arranged, ensure that the heat of PTC heater elements can pass to thermo bimetal in time in the underface of thrermostatic bimetal-plate Piece so that thrermostatic bimetal-plate is constantly in deformed state, to ensure that the thorough disconnection of circuit;Need thrermostatic bimetal-plate multiple Position only need to disconnect external major loop, stop powering for the utility model, wait for that temperature declines, you can complete thrermostatic bimetal-plate Reset.
Compared with prior art, the beneficial effects of the utility model are, the utility model in metal shell by setting Setting PTC heater elements makes thrermostatic bimetal-plate triggering state be maintained, to improve reliability when motor work.This reality It can be used in motor with novel.
In order to enable PTC heater elements is easier for installation reliable, it is upward convex to be machined with flange in the middle part of the felt pad The mounting hole risen, the PTC heater elements are placed in the mounting hole.
In order to enable contact of the movable contact with stationary contact is more convenient, be machined on the metal base plate raise up it is convex Platform, the stationary contact are fixed on the boss, and the through-hole coordinated with the boss is offered on the felt pad.
In order to enable the triggering of thrermostatic bimetal-plate is sensitiveer, it is convex that temperature correction is also machined with inside the metal shell Platform, the temperature correction boss contradict on thrermostatic bimetal-plate top surface.
In order to enable the spatula in the middle part of thrermostatic bimetal-plate contacts more convenient, the spatula bottom with PTC heater elements Portion is machined with arc convex.
In order to enable external cabling is more convenient, movable contact connecting terminal, the metal are connected on the metal shell Stationary contact connecting terminal is connected on bottom plate.
In order to enable connecting terminal connect relatively reliable, the movable contact connecting terminal and metal shell company with internal structure The place of connecing, stationary contact connecting terminal and metal base plate junction are both provided with reinforcing rib.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model.
Off state schematic diagram when Fig. 2 is utility model works.
Fig. 3 is metal shell structure schematic diagram in the utility model.
Fig. 4 is metab structural schematic diagram in the utility model.
Fig. 5 is felt pad structural schematic diagram in the utility model.
Fig. 6 is thrermostatic bimetal-plate side view in the utility model.
Fig. 7 is thrermostatic bimetal-plate vertical view in the utility model.
Wherein, 1 felt pad, 1a mounting holes, 1b through-holes, 2 metal shells, 2a temperature correction boss, 3 thrermostatic bimetal-plates, 3a Spatula, 4PTC heater elements, 5 movable contacts, 6 stationary contacts, 7 metal base plates, 7a boss, 8 reinforcing ribs, 9 movable contact connecting terminals, 10 stationary contact connecting terminals.
Specific implementation mode
A kind of New-type electric machine overcurrent overheat protector as shown in figs. 1-7, including hollow metal shell 2, metal shell 2 It is inside provided with felt pad 1, felt pad 1 is internally provided with metal base plate 7, and felt pad 1 is isolated by metal base plate 7 and metal shell 2 It opens, PTC heater elements 4 and stationary contact 6 is provided on metal base plate 7,1 middle part of felt pad is machined with the installation that flange raises up Hole 1a, PTC heater element 4 is placed in mounting hole 1a, and the boss 7a to raise up is machined on metal base plate 7, and stationary contact 6 is solid It is scheduled on boss 7a, offers on felt pad 1 and be located at outside metal with the top of through-hole 1b, the PTC heater element 4 of boss 7a cooperations Thrermostatic bimetal-plate 3 is provided in shell 2, one end of thrermostatic bimetal-plate 3 is welded with connection iron nail, and connection iron nail is weldingly fixed on metal On shell 2, the other end is provided with the movable contact 5 contacted with stationary contact 6, and temperature correction boss is also machined with inside metal shell 2 2a, temperature correction boss 2a are contradicted on 3 top surface of thrermostatic bimetal-plate, and the middle part of thrermostatic bimetal-plate 3 offers U-type groove so that heat The middle part of bimetal leaf 3 forms spatula 3a, and the heated rear both ends of thrermostatic bimetal-plate 3 are flipped up deformation and movable contact 5 is detached from Stationary contact 6, while spatula 3a moves downward conflict on PTC heater elements 4, the bottoms spatula 3a are machined with arc convex, It is connected with movable contact connecting terminal 9 on metal shell 2, stationary contact connecting terminal 10, movable contact wiring are connected on metal base plate 7 Terminal 9 is both provided with reinforcing rib 8 with 2 junction of metal shell, stationary contact connecting terminal 10 and 7 junction of metal base plate.
When utility model works, the electric current in major loop flow through metal shell 2 → connection iron nail → thrermostatic bimetal-plate 3 → 5 → stationary contact of movable contact, 6 → metal base plate 7 when motor breaks down, flows through thrermostatic bimetal-plate 3 at this time to be formed into a loop Electric current, which changes, causes the temperature of thrermostatic bimetal-plate 3 to increase, and reaches the triggering temperature of thrermostatic bimetal-plate 3, and thrermostatic bimetal-plate 3 is sent out Raw deformation so that 3 both ends of thrermostatic bimetal-plate are flipped up, since one end of thrermostatic bimetal-plate 3 is fixedly connected on metal shell 2 On, the one end for being provided with movable contact 5 at this time moves upwards so that movable contact 5 leaves stationary contact 6, and protection electricity is played in realization open circuit The effect on road;At the same time, the spatula 3a at 3 middle part of thrermostatic bimetal-plate is set and moves downward conflict in PTC heater elements 4 On, the electric current flowing of major loop becomes:4 → metal base plate of metal shell 2 → thrermostatic bimetal-plate, 3 → PTC heater elements 7 so that PTC heater elements 4 are in heating power state, and PTC heater elements 4 may be regarded as super large resistance at this time, and major loop is appointed in open circuit State ensure that the heat of PTC heater elements 4 can be timely in the underface of thrermostatic bimetal-plate 3 since PTC heater elements 4 are arranged Pass to thrermostatic bimetal-plate 3 so that thrermostatic bimetal-plate 3 is constantly in deformed state, to ensure that the thorough disconnection of circuit;It needs It wants thrermostatic bimetal-plate 3 to reset, only need to disconnect external major loop, stop powering for the utility model, wait for that temperature declines, you can Complete the reset of thrermostatic bimetal-plate 3.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this For the technical staff in field according to disclosed technology contents, not needing performing creative labour can be special to some of which technology Sign makes some and replaces and deform, these are replaced and deformation is within the protection scope of the present utility model.

Claims (7)

1. a kind of New-type electric machine overcurrent overheat protector, which is characterized in that including hollow metal shell, in the metal shell It is provided with felt pad, the felt pad is internally provided with metal base plate, and the felt pad is isolated by metal base plate and metal shell It opens, PTC heater elements and stationary contact is provided on the metal base plate, the top of the PTC heater elements is located at metal shell It is inside provided with thrermostatic bimetal-plate, one end of the thrermostatic bimetal-plate is welded with connection iron nail, and connection iron nail is connected to metal shell On, the other end is provided with the movable contact with the stationary contact point contact, and U-type groove is offered in the middle part of the thrermostatic bimetal-plate so that The middle part of thrermostatic bimetal-plate forms spatula, and the heated rear both ends of the thrermostatic bimetal-plate are flipped up deformation and movable contact is detached from Stationary contact, while spatula moves downward conflict on PTC heater elements.
2. a kind of New-type electric machine overcurrent overheat protector device according to claim 1, which is characterized in that in the felt pad Portion is machined with the mounting hole to raise up, and the PTC heater elements are placed in the mounting hole.
3. a kind of New-type electric machine overcurrent overheat protector device according to claim 1 or 2, which is characterized in that the metal The boss to raise up is machined on bottom plate, the stationary contact is fixed on the boss, is offered on the felt pad and institute State the through-hole of boss cooperation.
4. a kind of New-type electric machine overcurrent overheat protector device according to claim 1 or 2, which is characterized in that the metal Enclosure is also machined with temperature correction boss, and the temperature correction boss contradicts on thrermostatic bimetal-plate top surface.
5. a kind of New-type electric machine overcurrent overheat protector device according to claim 1 or 2, which is characterized in that the pressure tongue Piece bottom is machined with arc convex.
6. a kind of New-type electric machine overcurrent overheat protector device according to claim 1 or 2, which is characterized in that the metal It is connected with movable contact connecting terminal on shell, stationary contact connecting terminal is connected on the metal base plate.
7. a kind of New-type electric machine overcurrent overheat protector according to claim 6, which is characterized in that the movable contact wiring Terminal is both provided with reinforcing rib with metal shell junction, stationary contact connecting terminal and metal base plate junction.
CN201721875019.6U 2017-12-28 2017-12-28 A kind of New-type electric machine overcurrent overheat protector Active CN207966857U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721875019.6U CN207966857U (en) 2017-12-28 2017-12-28 A kind of New-type electric machine overcurrent overheat protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721875019.6U CN207966857U (en) 2017-12-28 2017-12-28 A kind of New-type electric machine overcurrent overheat protector

Publications (1)

Publication Number Publication Date
CN207966857U true CN207966857U (en) 2018-10-12

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Application Number Title Priority Date Filing Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111900033A (en) * 2020-08-25 2020-11-06 朱天兵 Overheat protector for automobile window

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111900033A (en) * 2020-08-25 2020-11-06 朱天兵 Overheat protector for automobile window

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GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20200117

Address after: No. 8067, Xiang'an West Road, industrial zone, Xiamen Torch High tech Zone (Xiang'an), Xiamen, Fujian Province

Patentee after: XIAMEN SET ELECTRONICS Co.,Ltd.

Address before: 225000 20 Chuang Road, Guangling Economic Development Zone, Guangling District, Yangzhou, Jiangsu.

Patentee before: YANGZHOU DEBAO ELECTRICAL APPLIANCE TECHNOLOGY CO.,LTD.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20220721

Address after: 214000 east side of floor 1, building 3, Xiangyun, No. 99, Furong Zhongsan Road, Xishan District, Wuxi City, Jiangsu Province

Patentee after: Saiertan (Wuxi) Electronics Co.,Ltd.

Address before: No. 8067, Xiang'an West Road, Xiamen Torch hi tech Zone (Xiang'an) Industrial Zone, Xiamen City, Fujian Province, 361000

Patentee before: XIAMEN SET ELECTRONICS Co.,Ltd.