CN1822270A - Automatic change-over switch electric appliance - Google Patents

Abstract

The invention relates to a power transfer switching device, in particular to an automatic transfer switching device. It includes common and spare circuit breakers and an operating mechanism, wherein the operating mechanism includes a motor output shaft, a turntable, left and right shaft levers, left and right rocker arms, a limit wheel, and a bracket. Its purpose is to design an automatic transfer switch appliance with thin thickness and small size. Compared with the prior art, the present invention has the advantages of simple and compact structure, super miniaturized volume, stable operation during operation, reliable mechanical interlock, long service life and easy manufacture.

Description

automatic transfer switch

technical field

The invention relates to a power transfer switching device, in particular to an automatic transfer switching device.

Background technique

Automatic power transfer switch, also known as "automatic transfer switch electrical appliances", is suitable for high-rise buildings, hospitals, shopping malls, banks, fire protection, chemical industry, metallurgy and other places that require uninterrupted normal power supply, and completes the dual-circuit power supply system (two mains or One-way mains + generator) or three-circuit power supply system (two-way mains + generator) power supply is automatically converted to ensure the reliability of power supply for important users. With the improvement of living standards, people have higher and higher requirements for the reliability of power supply, and automatic power transfer switches have gradually become indispensable equipment for power supply systems.

Automatic power transfer switches can be divided into two levels: PC level or CB level. PC level is an automatic power transfer switch that can be connected, carried, but not used to break short-circuit current. Class CB is an automatic power transfer switch equipped with an over-current release. Its main contacts can be connected and used to break the short-circuit current, and generally have an overload protection function at the same time. The size, cost and price of the PC-level automatic power transfer switch and the CB-level automatic power transfer switch are comparable. However, PC-level automatic power transfer switches do not have short-circuit protection and overload protection functions, so protection components (such as circuit breakers or fuses) must be added to distribution lines, and general CB-level automatic power transfer switches themselves have short-circuit protection and overload protection functions, so The distribution box (cabinet) composed of CB-level automatic power transfer switches is smaller in size and lower in cost, and its usage far exceeds that of PC-level.

The main components of CB level automatic power transfer switch are: controller, operating mechanism and two circuit breakers.

The ultra-miniaturization of automatic power transfer switch is the technical development direction in this field today, and the main point to overcome the miniaturization of automatic power transfer switch is the miniaturization of the operating mechanism. The current operating mechanism includes electromagnetic type and single motor type, single motor bidirectional The operating mechanism currently includes "turntable-slider two-way operating mechanism", "turntable-swing rod two-way operating mechanism" and "gear-skateboard two-way operating mechanism". Due to the structural limitations of the turntable, swing rod, gear, skateboard and other components, the size is relatively large , so that these single-motor operating mechanisms and electromagnetic operating mechanisms cannot achieve ultra-miniaturization.

Contents of the invention

The purpose of the present invention is to design a thin, small and exquisite automatic transfer switch electric appliance.

In order to achieve the above object, the present invention adopts the following technical solutions: an automatic transfer switch electrical appliance, including common and standby circuit breakers and an operating mechanism, which is characterized in that the operating mechanism includes a motor output shaft, a turntable, left and right shaft-shaped levers, a left , right rocker arm, limit wheel, bracket, the bracket is connected between the normal and standby circuit breakers, the limit wheel is coaxial with the turntable, and connected with the output shaft of the motor, and the left and right axial levers are symmetrically arranged on the turntable , the fulcrums of the left and right rocker arms are symmetrically connected to the bracket, the left and right shaft-shaped levers are respectively slidingly connected with one end of the left and right rocker arms, and the other ends of the left and right rocker arms are connected with the folded edges of the left and right operating handles. The special-shaped hole is plugged in, and the end face of the rocking arm opposite to the limiting wheel is a smooth arc surface, which forms a rocking arm limiting device with the larger radius arc surface of the limiting wheel.

Since the connection point between the rocker arm and the operating handle is lower than the top of the circuit breaker, the overall height of the operating mechanism is reduced; secondly, the limit device directly uses the rocker part to reduce the number of parts. At the same time, the limit wheel is located in the middle of the turntable, occupying very little space Space, and the two ends of the rocker arm and the shaft-shaped lever and the operating handle are connected by plugging, and the distance between them is very short, which reduces the space occupied. Therefore, the adoption of the technical solution makes the thickness of the automatic transfer switch electrical appliance thinner and smaller, and the requirement of ultra-miniaturization of the automatic transfer switch is truly realized.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a top view of the structure of this embodiment.

Fig. 2 is an enlarged view of part A in Fig. 1 .

Figure 3a is a front view of the turntable structure.

Fig. 3b is a top view of Fig. 3a.

Figure 4a is the front view of the handle structure of the left operating mechanism.

Fig. 4b is a sectional view along B-B in Fig. 4a.

Fig. 5 is a structural schematic diagram of the left rocker arm part.

Fig. 6a is a schematic diagram of the left and right rocker arms in the state of left closing and right opening.

Fig. 6b is a schematic diagram of the left and right rocker arms in the state of left split and right split.

Fig. 6c is a schematic diagram of the left and right rocker arms in the state of left opening and right closing.

Detailed ways

As shown in Fig. 1 and Fig. 2, the present embodiment includes common and standby circuit breakers (2), (3) and an operating mechanism, wherein the operating mechanism includes a motor output shaft (12), a turntable (9), left and right shafts Shape driving lever (8), (10), left and right rocking arms (7), (11), spacer wheel (15), operating mechanism handle (1), (4), support (6). The support (6) is connected between the common and standby circuit breakers (2), (3), and the fulcrums of the left and right rocking arms (7), (11) are symmetrically connected to the support (6).

As shown in Fig. 3a-Fig. 3b, turntable (9) is made up of two turntable plates (16), (17) up and down, and limit wheel (15) is located between two turntable plates, and turntable plate (16), (17) are coaxial, and are connected with the motor output shaft (12), and the left and right shaft-shaped driving levers (8), (10) are symmetrically arranged on the turntable, and the cross-section of the limit wheel (15) is composed of two different The radius of the semicircular composition.

As shown in Figure 5, one end of the left and right rocker arms (7), (11) has a through groove (21) respectively, which is matched with the left and right shaft-shaped levers (8), (10) Constitute sliding connection, and the opposite rocking arm end face (22) of spacing wheel (15) is smooth circular arc surface, and it constitutes rocking arm spacing device with the arc surface of the larger radius of spacing wheel.

As shown in Figure 4a-4b, the left and right operating mechanism handles (1), (4) are folded at 90° at the left and right ends, the middle part of the handle is a curved concave groove (20), and the circuit breaker handle (5) is inserted into the In the concave groove (20), it is easy to assemble, and the two ends of the flange are hinged on the side of the circuit breaker. The rotation axis of the handle of the operating mechanism and the rotation axis of the handle of the circuit breaker are on the same straight line. 1), (4) flange special-shaped hole (19) and left and right rocking arm (7), (11) other end inserting.

As shown in Fig. 2 and Fig. 3b, an axle (13) is arranged on the periphery of the turntable (9), and two limit switches (14) are installed below the turntable (9), and the axle (13) and the limit switch ( 14) Cooperate with the rotation position corresponding to the turntable (9), and electrically limit the rotation angle of the turntable (9).

When the left circuit breaker (generally connected to the common power supply) needs to be closed, the motor output shaft (12) rotates counterclockwise to drive the turntable (9) to rotate counterclockwise, and the left shaft-shaped lever (8) drives the left rocker arm (7) Rotate clockwise to make the left operating mechanism handle (1) and the circuit breaker handle rotate upward to complete the closing action of the left circuit breaker. The surface and the smooth arc end surface (22) of the right rocker arm work together to lock the open state of the circuit breaker on the right (as shown in Figure 6a).

When the circuit breaker on the right side (generally connected to the backup power supply) needs to be closed, at this time, the left and right rocker arms are in the state shown in Figure 6a (that is, the circuit breaker is left closed and right opened), and the motor output shaft (12) rotates clockwise to drive The turntable (9) rotates clockwise, and the left rocker arm (7) rotates counterclockwise through the left shaft-shaped lever (8), so that the left operating mechanism handle (1) and the circuit breaker handle rotate downward to complete the left The circuit breaker opens, so that both the left and right circuit breakers are in the open state (as shown in Figure 6b), the turntable (9) continues to rotate clockwise, and the right shaft-shaped lever (10) drives the right rocker arm (11) counterclockwise Rotate to make the right operating mechanism handle (4) and the circuit breaker handle rotate upwards to complete the closing action of the right circuit breaker, and at the same time the limit wheel (15) in the turntable (9) works together with the left rocker arm (7) Make the circuit breaker on the left lock the open state (as shown in Figure 6c). vice versa.

To sum up, the present invention has the advantages of simple structure, thin thickness, small volume, less mechanism consumables, easy manufacture, and low cost; the switch has low noise, stable action, no impact on the handle of the circuit breaker, reliable mechanical interlock, and no damage to the circuit breaker. Two-way power supply short-circuit failure, long service life. Because all the components making up the operating mechanism are small in volume and compact in structure, the present invention has ultra-small volume.

Claims (5)

1. An automatic transfer switch appliance, including common and standby circuit breakers (2), (3) and an operating mechanism, characterized in that the operating mechanism includes a motor output shaft (12), a turntable (9), left and right shaft-shaped dials Bar (8), (10), left and right rocking arms (7), (11), spacer wheel (15), support (6), support (6) is connected in common use and standby circuit breaker (2), ( 3), the limit wheel (15) is coaxial with the turntable (9), and is connected with the motor output shaft (12), and the left and right shaft-shaped levers (8), (10) are symmetrically arranged on the turntable, The fulcrum symmetry axis of left and right rocking arms (7), (11) is connected on the support (6), and left and right shaft-shaped driving rods (8), (10) are respectively connected with left and right rocking arms (7), ( 11) One end is slidingly connected, the other ends of the left and right rocker arms (7), (11) are plugged into the special-shaped holes (15) on the flanges of the left and right operating handles (1), (4), and connected with the limit wheel ( 15) the opposite rocking arm end face (22) is a smooth arc surface, and it constitutes the rocking arm spacing device with the larger radius arc surface of the spacing wheel (15). 2. The automatic transfer switch appliance according to claim 1, characterized in that the left and right operating handles (1), (4) are folded at 90° at the left and right ends, and the two ends of the folded edges are hinged on the side of the circuit breaker, The middle part of the handle is a curved concave groove (20), and the circuit breaker handle (3) is inserted in the concave groove (20). 3. The automatic transfer switch appliance according to claim 2, characterized in that the ends of the left and right rocker arms (7), (11) are respectively provided with through slots (21), which are connected with the left and right rocker arms. The right shaft-shaped driving lever (8), (10) cooperates to form a sliding connection. 4. The automatic transfer switch appliance according to claim 3, characterized in that the turntable (9) is composed of two turntable plates (16) and (17) up and down, and the limit wheel (15) is set on the two turntables. between the boards. 5. The automatic transfer switch appliance according to claim 4, characterized in that the cross section of the limit wheel (15) is composed of two semicircular surfaces with different radii.

Images