CN2157595Y

CN2157595Y - Heat protector

Info

Publication number: CN2157595Y
Application number: CN 93214638
Authority: CN
Inventors: 刘玉考
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-31
Filing date: 1993-05-31
Publication date: 1994-02-23
Anticipated expiration: 2003-05-31

Abstract

The utility model relates to a heat protector for a single-phase motor, which comprises a core body and a shell body. A wire connecting terminal, a supporting plate and a fixed contact point of the core body are respectively fixed on the same insulating block, and a movable contact point of a bimetallic disc piece arranged under the supporting plate is in contact with the fixed contact point. The other end of the disc piece opposite to the movable contact point is fixed on the end part of the supporting plate, and the other end of the supporting plate is provided with the wire connecting terminal. One end of an electric heating wire arranged under the disc piece is connected with the fixed contact point, and the other end is connected with the wire connecting terminal. The core body is arranged in the sealed shell body. The heat protector has the advantages of small volume, simple structure, material saving and low cost. The utility model is suitable for the temperature protection of various domestic appliances and is suitable for being used as a current limiter.

Description

Heat protector

The utility model relates to a kind of thermal protector, and it comprises binding post, bimetal leaf and the moving contact that is driven thereof, fixed contact, heating wire (band), support plate and collets, and it belongs to the thermally-actuated switch technical field of electrical equipment.

A kind of thermal protector is disclosed in CN2106411U, its objective is provide a kind of collect overcurrent protection, overtemperature protection and three kinds of functions of automatic cut out be being applicable to of one at present commercially available various miniature, micro-machine and middle size motor and the thermal protector that need not reserve the installation site for it that directly starts.Its formation is that binding post, fixed contact and adjusting nut all are fixed on the same insulation framework, be fixed with the moving contact of insulation with it on the concave surface of bimetal leaf, its convex surface center be connected with one can be with it adjustment screw in relative rotation, adjusting screw links to each other with insulation framework by adjusting nut, moving contact directly or indirectly joins with a binding post by a flexible cord, the heating wire that directly or indirectly is connected between binding post places under the concave surface of video disc, and insulation framework has a seal casinghousing outward.Its weak point is when being used for the monophase machine protection, seems a bit reluctantly, as: physical dimension seems excessive, and it is complicated that structure seems, not only wastes raw material but also make cost too high.

The purpose of this utility model is to overcome above-mentioned weak point of the prior art and the monophase machine that a kind of volume is little, simple in structure, cost is low thermal protector is provided.

The purpose of this utility model is realized by following measure: a kind of thermal protector, it is based on the operation principle of former " bimetal disk ".It comprises core body and housing, core body comprises binding post again, drive the bimetal disk of contact, fixed contact, heating wire (band), support plate and collets, its main points are the binding post of said core body, support plate and fixed contact are separately fixed on the same collets, place the moving contact of the bimetal disk under the support plate to contact with fixed contact, the other end of the bimetal disk relative with moving contact is fixed on the end of support plate, the other end of support plate is a binding post, place heating wire one end and fixed contact under the bimetal disk to join, the other end and binding post join, and core body places among the seal casinghousing.

The take-off temperature of bimetal disk can be brought in realization by means of the scalariform of breaking support plate off with the fingers and thumb, also can support plate establish an adjustment screw with pairing position, bimetal disk center, by means of the take-off temperature of adjustment screw control video disc.Bimetal disk is made the people when preventing that electric current is excessive in the circuit and damage, can between the moving contact of bimetal disk and support plate, connect a flexible conductor.

The utility model is described in further detail below in conjunction with the embodiment accompanying drawing:

Fig. 1 is the thermal protector front view.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the upward view of Fig. 1.

Fig. 4 is a schematic diagram.

Be connected with the schematic diagram of flexible conductor between the moving contact of Fig. 5 bimetal disk and support plate.

Referring to Fig. 1, Fig. 2 and Fig. 3; the core body 5 of thermal protector places seal casinghousing 1; the binding post 7 of core body 5, support plate 4 and fixed contact 8 are fixed on the same collets 6 with rivet respectively; place the moving contact 9 of the bimetal disk 3 under the support plate 4 to contact with fixed contact 8; the other end of the bimetal disk 3 relative with moving contact 9 is riveted on the end of support plate 4 with rivet 11; the other end of support plate 4 is a binding post 12; place the heating wire 10 one end points under the bimetal disk 3 to be welded on the fixed contact 8, other end point is welded on the binding post 7.The take-off temperature of bimetal disk can realize that also available adjustment adjustment screw 2 realizes for the sloped-end angle that helps to break off with the fingers and thumb support plate 4.

Referring to Fig. 4, binding post 7,12 is serially connected in the end of incoming cables of monophase machine, and with the thermal sensible section of this protector in the stator winding end of motor casing.The take-off temperature of the video disc 3 of thermal protector is adjusted before dispatching from the factory according to user's needs.When motor moved, because overcurrent, overheated when making the take-off temperature that electric machine temperature rise reaches video disc 3, video disc 3 just drove upwards upset of moving contact 9, made it and fixed contact 8 disconnects, thereby reached the purpose of cutting off the current protection motor.After motor temperature descended, video disc 3 can connect circuit from horizontal reset, and motor reruns.

Referring to Fig. 5,, can shunt at moving contact 9 and 4 companies of support plate, one flexible conductor 13 for anti-excessive electrical injuries bimetal disk 3.Shown in the figure, flexible conductor 13 is connected between moving contact 9 and support plate 4 ends.

Thermal protector provided by the utility model is simple in structure, and volume is little, material-saving, and cost is low.Be not only applicable to the overheated overcurrent protection of monophase machine, but also be applicable to the temperature protection of various household electrical appliance, also can make flow restricter and use.

Claims

1; a kind of thermal protector; it comprises core body and housing; core body wraps binding post again; drive the bimetal disk of contact; fixed contact; heating wire (band); support plate and collets; the binding post 7 that it is characterized in that said core body 5; support plate 4 and fixed contact 8 are separately fixed on the same collets 6; place the moving contact 9 of the bimetal disk 3 under the support plate 4 to contact with fixed contact 8; the other end of the bimetal disk 3 relative with moving contact 9 is fixed on the end of support plate 4; the other end of support plate 4 is a binding post 12; place heating wire 10 one ends and fixed contact 8 under the bimetal disk 3 to join; the other end and binding post 7 join, and core body 5 places among the seal casinghousing 1.

2, thermal protector according to claim 1, what it is characterized in that said support plate 4 is provided with an adjusting knuckle and an adjustment screw 2 with pairing position, bimetal disk 3 centers.

3, thermal protector according to claim 1 and 2 is characterized in that the moving contact 9 of said bimetal disk 3 and 4 of support plates are connected with a flexible conductor 13.