CN208690189U - The built-in current over-load protector of three-phase - Google Patents

Abstract

The utility model discloses a kind of built-in current over-load protectors of three-phase; including top closed, bottom opening metal shell; the metal base plate of closure bottom; across bottom plate and the conductive column that is connect with bottom plate insulated enclosure, and the static contact, movable contact spring and the bimetal leaf that are arranged in the confined space that shell and bottom plate are constituted；Static contact has the vertical plate for installing the suspension board of static contact and being fixedly connected with bottom plate, conductive column is located at the lower section of the static contact, the curved panel of bimetal leaf is arranged vertically with bottom plate, the support plate being made into integration with it is equipped in the curved panel lower part of bimetal leaf, support plate is fixedly connected with bottom plate, the rear end of movable contact spring is fixedly mounted on the end of bimetal leaf, the front end of movable contact spring is placed between conductive column and static contact, is also coated with insulation material layer at the front end upper surface of movable contact spring and/or lower surface.The utility model structure is simple, and reliable performance, temperature threshold is adjustable, long service life.

Description

The built-in current over-load protector of three-phase

Technical field

The utility model relates to a kind of non-electricity protectors, more particularly to one kind when the electrical equipments such as motor, compressor are in mistake It when flowing through heat, can automatically cut off the power, the built-in current over-load protector of the three-phase for preventing it from burning.

Background technique

The existing built-in current over-load protector of three-phase, such as Chinese utility model patent ZL201621164517.5 institute Disclosed structure comprising shell, fixing seat, bimetal leaf, conductive sheet, insulation board and bracket with cavity, fixing seat are solid Determine on the shell, one end of bimetal leaf is fixed on the lower section of fixing seat, and the other end is fixed with movable contact；Bracket includes first flat Row face and the second parallel surface and vertical plane, the first parallel surface are close to the intracorporal lower surface of chamber of shell, and insulation board, which is folded in, leads Between electric piece and the first parallel surface, the second parallel surface is located at the top of movable contact, is fixed with and movable contact pair on the second parallel surface The stationary contact that should be arranged；Conductive sheet is tortuous bending structure, and one end welds together with bimetal leaf, and other end connection is led Line.

But existing non-electricity protector has the following deficiencies: in actual use

(1) the non-electricity protector service life of this structure is shorter, protects the reliability of circuit poor；

(2) after the completion of bimetal leaf is welded and fixed, the bimetal leaf of setting overturns temperature, that is, non-electricity protector temperature threshold Value just can not be adjusted again, limit the use scope of non-electricity protector.

Summary of the invention

The technical problem to be solved by the present invention is to provide a kind of structure is simple, reliable performance, with long service life three Mutually built-in current over-load protector.

In order to solve the above technical problems, the utility model uses the built-in current over-load protector of such a three-phase, packet Top closed, bottom opening metal shell is included, the metal base plate of the outer casing bottom is closed, passes through the bottom plate and and bottom plate The conductive column of insulated enclosure connection, and the static contact, the movable contact spring and double that are arranged in the confined space that shell is constituted with bottom plate Sheet metal；The static contact has the vertical plate for installing the suspension board of static contact and being fixedly connected with the bottom plate, described to lead Electric column is located at the lower section of the static contact, and curved panel and the bottom plate of the bimetal leaf are arranged vertically, in the bimetal leaf Curved panel lower part be equipped with the support plate that is made into integration with it, the support plate is fixedly connected with bottom plate, the movable contact spring Rear end is fixedly mounted on the end of bimetal leaf, and the front end of movable contact spring is placed between the conductive column and static contact, described dynamic Insulation material layer is also coated at the front end upper surface of contact and/or lower surface.

As a kind of preferred embodiment of the utility model, it is additionally provided between the suspension board and vertical plate of the static contact One lower flap portion tilted down, the suspension board, vertical plate and lower flap portion is stamped is made into integration.

As another preferred embodiment of the utility model, also set between the suspension board and vertical plate of the static contact There is an acclivitous upper folded plate, the suspension board, vertical plate and upper folded plate is stamped is made into integration.

With such a structure, the utility model has the following beneficial effects:

When reaching temperature threshold, flexible deformation, the insulating materials of movable contact spring front end occur the utility model for bimetal leaf Layer is contacted with static contact and/or conductive column, protector power-off, to achieve the purpose that current overload overheating protection, this is practical new Type structure is simple, reliable performance, long service life.

The utility model is when institute's screening protector temperature threshold is not required value, by inclining to lower flap portion or upper folded plate The change of oblique degree changes the complexity of bimetal leaf bending deformation, if lower flap portion inclined degree is higher, movable contact spring with it is quiet Existing frictional force is bigger when relatively moving between contact, conductive column, and the difficulty that bimetal leaf is deformed also is got over Height, to reach the adjustable purpose of temperature threshold, the utility model expands the use scope of non-electricity protector.

Detailed description of the invention

Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.

Fig. 1 is a kind of structural schematic diagram of the built-in current over-load protector of the utility model three-phase.

Fig. 2 is a kind of structural schematic diagram for not showing shell in Fig. 1.

Fig. 3 is the schematic top plan view of Fig. 2.

Fig. 4 is a kind of structural schematic diagram of the utility model in low-temperature condition.

Fig. 5 is a kind of structural schematic diagram of the utility model when reaching temperature threshold.

Specific embodiment

The built-in current over-load protector of a kind of three-phase referring to figs. 1 to 5, is fixedly mounted on compressor or electricity The inside of the electrical equipments such as machine, for the failure of current by electrical equipment in overcurrent overheat operating condition comprising top closed, bottom Portion opening metal shell 1, close the metal base plate 2 of 1 bottom of shell, pass through the bottom plate 2 and by insulating glass with The conductive column 3 of 2 insulated enclosure of bottom plate connection, and the static contact 4, dynamic being arranged in the confined space that shell 1 and bottom plate 2 are constituted Contact 5 and bimetal leaf 6；The static contact 4 fixes company with the suspension board 4a for installing static contact 7 and with the bottom plate 2 The vertical plate 4b connect, the conductive column 3 are located at the lower section of the static contact 7, the curved panel 6a and bottom plate 2 of the bimetal leaf 6 It is arranged vertically, the support plate 6b being made into integration with it, the support plate is equipped in the lower part curved panel 6a of the bimetal leaf 6 6b is fixedly connected with bottom plate 2, and the rear end 5b of the movable contact spring 5 is fixedly mounted on the end of bimetal leaf 6, the front end of movable contact spring 5 5a is placed between the conductive column 3 and static contact 7, is also coated at the front end upper surface 5a of the movable contact spring 5 and/or lower surface There is insulation material layer 8.

As a kind of preferred embodiment of the utility model, as shown in Figure 2-5, in the suspension board 4a of the static contact 4 It is stamped that lower flap portion 4c, the suspension board 4a, vertical plate 4b and lower flap portion 4c that one tilts down are additionally provided between vertical plate 4b It is made into integration.When institute's screening protector temperature threshold is not required value, by the change to lower flap portion 4c inclined degree come Change the complexity of 6 bending deformation of bimetal leaf, lower flap portion 4c inclined degree is higher, movable contact spring 5 and static contact 7, conductive column 3 Between frictional force existing when relatively moving it is bigger, the difficulty that bimetal leaf 6 is deformed is also higher, to reach The adjustable purpose of temperature threshold.

As another preferred embodiment of the utility model, the suspension board 4a and vertical plate 4b of the static contact 4 it Between be additionally provided with an acclivitous upper folded plate, the inclined direction of upper folded plate and lower flap portion 4c is exactly the opposite, the suspension board 4a, Vertical plate 4b and upper folded plate is stamped is made into integration, does not show, which equally makes protector reach the adjustable mesh of temperature threshold in figure 's.

Referring to Fig. 3,4, in low-temperature condition, in the raw, the front end 5a of movable contact spring 5 is uncoated absolutely for bimetal leaf 6 8 parts of edge material layer, that is, metal part is contacted with static contact 7, conductive column 3, and protector is connected, and plays electric action.

Referring to Fig. 5, when reaching temperature threshold, flexible deformation, the insulating materials of 5 front end of movable contact spring occur for bimetal leaf 6 Layer 8 is contacted with static contact 7 and/or conductive column 3, protector power-off, to achieve the purpose that current overload overheating protection.Scheming In, the utility model only shows that insulation material layer 8 in the front end upper surface 5a of movable contact spring 5, does not show insulation material layer 8 in movable contact spring 5 The front end lower surface 5a.

When institute's screening protector temperature threshold is not required value, by lower flap portion 4c or upper folded plate inclined degree Change to change the complexity of 6 bending deformation of bimetal leaf, if lower flap portion 4c inclined degree is higher, movable contact spring 5 and static contact 7, existing frictional force is bigger when relatively moving between conductive column 3, and the difficulty that bimetal leaf 6 is deformed also is got over Height, to reach the adjustable purpose of temperature threshold.

Through on probation, the utility model can cut off the power in time when reaching temperature threshold, to electricity consumptions such as compressor or motors Equipment provides protection, and the temperature threshold of the utility model is adjustable, and structure is simple, reliable performance, and long service life achieves Good effect.

Claims (3)

1. a kind of built-in current over-load protector of three-phase closes institute including top closed, bottom opening metal shell (1) The metal base plate (2) of shell (1) bottom is stated, the conductive column (3) for passing through the bottom plate (2) and being connect with bottom plate (2) insulated enclosure, And static contact (4), movable contact spring (5) and bimetal leaf (6) of the setting in the confined space that shell (1) and bottom plate (2) is constituted； The static contact (4) has the vertical plate for installing the suspension board (4a) of static contact (7) and being fixedly connected with the bottom plate (2) (4b), the conductive column (3) are located at the lower section of the static contact (7), it is characterised in that: the arcwall face of the bimetal leaf (6) Plate (6a) is arranged vertically with bottom plate (2), is equipped in the curved panel lower part (6a) of the bimetal leaf (6) and is made into integration with it Support plate (6b), the support plate (6b) are fixedly connected with bottom plate (2), and the rear end (5b) of the movable contact spring (5) is fixedly mounted on The front end (5a) of the end of bimetal leaf (6), movable contact spring (5) is placed between the conductive column (3) and static contact (7), described Insulation material layer (8) are also coated at the front end upper surface (5a) of movable contact spring (5) and/or lower surface.

2. the built-in current over-load protector of three-phase according to claim 1, it is characterised in that: in the static contact (4) Suspension board (4a) and vertical plate (4b) between be additionally provided with the lower flap portion tilted down (4c), the suspension board (4a), vertical plate (4b) and lower flap portion (4c) is stamped is made into integration.

3. the built-in current over-load protector of three-phase according to claim 1, it is characterised in that: in the static contact (4) Suspension board (4a) and vertical plate (4b) between be additionally provided with an acclivitous upper folded plate, the suspension board (4a), vertical plate (4b) With upper folded plate is stamped is made into integration.