CN2458800Y - Substration phase protector for electrical appliance switch - Google Patents

Abstract

The utility model relates to an open-phase protector for electrical appliance switches, which comprises a fixing bracket, a movable bracket, metal sheets and a spring, wherein the lower end surface of the fixing bracket is provided with a notch, and the lower part of the fixing bracket is fixed with one metal sheet; both sides of the lower end of the metal piece are outwards bent into a clamping hook for clamping a switch shaft, and the middle of the metal sheet is inwards bent into a hook and is provided with a hole where the spring passes through; one metal sheet is fixed on the movable bracket, and the metal sheet is forwards bent and is provided with a step which clamps a fulcrum above the metal sheet. The utility model has the advantages of simple structure, stable performance, small size and low cost. In addition, the utility model can effectively protect the open phase, the overload and the short circuit of circuits, electric appliances and motors. The utility model can be installed and used on various electric appliances, the circuits, switch cabinets and knife switches, and also has the function of single power failure.

Description

The appliance switch phase-lacking protective device

The utility model belongs to protective device, particularly a kind of appliance switch phase-lacking protective device.

At present commercially available air switch has only the protection of overload, short circuit, does not have open-phase protection, electrical equipment occurs easily, motor burns out, even open-phase protection is arranged, and structure more complicated, unstable properties, cost height.

It is a kind of simple in structure that the purpose of this utility model is to provide, stable performance, the appliance switch phase-lacking protective device that cost is low.

Technical solution of the present utility model is such, comprise by fixed support, live support, sheet metal, spring, fixed support is made I shape with insulation board, the fixed support lower surface has 2 breach, support bracket fastened bottom is fixed with sheet metal, the sheet metal both sides curve the right angle, the top is the step fulcrum, there is grab on both sides, sheet metal lower end to excurvation, the chucking switch shaft, middle inwardly bending has hook and perforate to pass spring, and the support of living is made with insulation board, living is fixed with sheet metal on the support, and sheet metal is to antecurvature and have a step to block the fulcrum of sheet metal top.

The utility model has the advantages that simple in structure, stable performance, volume is little, cost is low, effectively the phase shortage of protective circuit, electrical equipment, motor, overload, short circuit.The utility model can be installed in various electrical equipment, circuit, switch cubicle, knife switch use, also has independent power down function.

Below in conjunction with drawings and Examples to the utility model further instruction.

Fig. 1 is an overall structure front view of the present utility model.

Fig. 2 is an overall structure vertical view of the present utility model.

Fig. 3 is an overall structure left view of the present utility model.

Fig. 4 is the left view of overall structure of the present utility model fixed mount open mode alive.

Fig. 5 is a fixed support parts front view of the present utility model.

Fig. 6 is a fixed support parts left view of the present utility model.

Fig. 7 is a bracket component front view alive of the present utility model.

Fig. 8 is a bracket component left view alive of the present utility model.

Among Fig. 1～Fig. 8, fixed support (1), the support (2) of living, spring (3), sheet metal (4), sheet metal (5), axle hook (6), breach (7).

Most preferred embodiment of the present utility model is such.Referring to figs. 1 through shown in Figure 8, fixed support (1) is made I shape with insulation board, fixed support (1) lower surface has 2 breach (7), the bottom of fixed support (1) is fixed with sheet metal (5), sheet metal (5) both sides curve the right angle, the top is step fulcrum (8), sheet metal (5) both sides, lower end have a hook (6) to block switch shaft to excurvation, middle inwardly bending has hook and perforate to pass spring (3), the support (2) of living is made with insulation board, living is fixed with sheet metal (4) on the support (2), and sheet metal (4) is to antecurvature and have a step to be stuck on the fulcrum (8) of sheet metal (5), in the middle of the sheet metal (4) curved hook is arranged and has the hole pass spring (3).

When installing and using, fixed support (1) has spring (3) tension with the support (2) of living, and the axle hook (6) on the sheet metal (5) blocks on switch shaft.When the scarce phase time wherein of three phase mains; two gold plaques on the switch produce thermal effect; the two gold plaques of three-phase are not point-blank; appearance moves forward and backward; fixed support (1) is along with moving, because spring (3) effect, the support (2) of living is opened; release on the switch is opened and cuts off the electricity supply simultaneously, plays the purpose of protection electrical equipment.

Claims (1)

1. A kind of appliance switch phase-lacking protective device; comprise by fixed support; support alive; sheet metal; spring; it is characterized in that fixed support (1) makes I shape with insulation board; fixed support (1) lower surface has breach (7); the bottom of fixed support (1) is fixed with sheet metal (5); sheet metal (5) both sides curve the right angle; the top is step fulcrum (8); there is grab (6) chucking switch shaft on sheet metal (5) both sides, lower end to excurvation; middle inwardly bending has hook and perforate to pass spring (3); the support (2) of living is made with insulation board, is fixed with sheet metal (4) on the support (2) of living, and sheet metal (4) is to antecurvature and have a step to block the fulcrum (8) of sheet metal top.

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