CN1632896A - Transmission Mechanism of Double Power Automatic Transfer Switch - Google Patents

Abstract

This invention relates to a double power auto switch driving mechanism, which comprises motor, base plate, cam disc, two slide blocks, drive shaft and two micro switches, wherein the each slide block is set with close and separate brake drive action plane, limit action plane and a groove with H distance. The said cam disc is set with two drive rollers and two limit rollers and the drive slide block moves linear reverse to realize the on or off operations of the breaker. Each limit roller is cooperated with the relative slide block to limit the move of the slide block to make only one breaker in on position.

Description

Transmission Mechanism of Double Power Automatic Transfer Switch

technical field

The invention relates to a dual-power automatic switch, in particular to a transmission mechanism for a dual-power automatic switch.

Background technique

The dual power supply automatic transfer switch uses two plastic case circuit breakers to switch the two power sources. It is required that when one circuit breaker is in the closing state, the other circuit breaker is not allowed to close. It is used in important places where power failure is not allowed, and the switching time is a very important parameter of the dual power automatic transfer switch. Usually, the dual-power automatic transfer switch uses a motor that rotates at a uniform speed to drive an interlock mechanism to switch, and the motor is controlled by a remote controller. As we all know, when the molded case circuit breaker closes and opens, after the circuit breaker mechanism passes the "dead point", the force generated by the spring of the circuit breaker mechanism will make the circuit breaker quickly close and open. After the device passes the "dead point", the closing and opening speeds are faster than the speed of the motor. In Chinese patent 02220660.4, this patent uses the mechanism of cam, slider, and roller to solve the problem of the height of the switching device and the mechanical interlocking problem, but there are still problems when the circuit breaker is closed or opened, because the circuit breaker exceeds the "dead point". "The rear speed is faster than the speed of the motor, causing the slider to collide with the cam, thereby reducing the defect of the service life of the dual power automatic switch. And there is also the defect that the switching time between the main and backup power circuit breakers is long.

Contents of the invention

The purpose of the present invention is to address the above-mentioned defects and to provide a transmission mechanism for a dual power supply automatic transfer switch, including a motor, a base plate, a cam turntable, two symmetrical sliders, a transmission shaft and two symmetrically arranged on the base plate. The micro switch, the motor is installed on the bottom plate and mechanically connected with the transmission shaft, the transmission shaft is connected with the cam turntable, the two micro switches are respectively arranged opposite to the two sliders, the Each slider is provided with a closing driving surface, an opening driving surface and a limiting surface, and a groove with a certain distance H is provided between the two driving surfaces; the cam The turntable is provided with two driving rollers and two limit rollers, and each of the driving rollers cooperates with the driving surface on the corresponding slider to drive the slider to make a reciprocating linear motion; the slider Cooperate with the handle of the circuit breaker to realize the closing and opening of the circuit breaker; each of the limit rollers cooperates with the limit action surface on the corresponding slider to limit the movement of the slider, so that only one of the two circuit breakers One is in the closed position.

In the transmission mechanism of the double power supply automatic switching switch of the present invention, the motor drives the cam turntable to rotate, and the driving roller on the cam turntable acts on the driving surface of the corresponding slider to make the slider move in a straight line, thereby driving the handle of the circuit breaker Movement, when the operating mechanism of the circuit breaker passes the "dead point", it will produce accelerated movement, thus driving the slider to move quickly to the closing or opening position, and pressing the micro switch to power off the motor. Since there is a groove with a certain distance H between the two driving surfaces on the same slide block, the acceleration movement of the operating mechanism of the circuit breaker when it passes the "dead point" avoids the collision between the slide block and the driving roller. When one of the sliders moves until the controlled circuit breaker is closed, the limit action surface of the other slider is just opposite to the limit roller on the cam turntable, so that it cannot move in the direction of closing, keeping In the open state, it can ensure that only one of the two circuit breakers is in the closed position.

As a further improvement of the present invention, the cam turntable is composed of two identical cams connected, and the two driving rollers and the two limiting rollers are arranged between the two cams.

Description of drawings

Other advantages and structures of the present invention will become clearer through the description in conjunction with the following drawings.

Fig. 1 is a mechanism schematic diagram of the present invention;

Fig. 2 is a top view of Fig. 1 with some parts removed;

Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 are motion diagrams.

Detailed ways

1 and 2, the transmission device includes a base plate 4, a motor 10, a cam turntable 3, a transmission shaft 8, a slider 1, a micro switch 2, a guide rail 9, a slider 7, a micro switch 5 and a guide rail 6. The motor 10 is installed on the bottom plate 4, and can rotate counterclockwise or clockwise under the control of the controller; the output shaft of the motor 10 is connected with the transmission shaft 8, and the transmission shaft 8 is positioned on the cam turntable 3, so that the motor 10 rotates counterclockwise Or when rotating clockwise, it will drive the cam turntable 3 to rotate counterclockwise or clockwise. The slider 1 and the slider 7 are arranged symmetrically on both sides of the cam turntable 3, and respectively cooperate with the handle of the molded case circuit breaker to realize the "closing and opening" gate of the molded case circuit breaker. The guide rail 6 and the guide rail 9 are installed on the bottom plate 4, the slider 1 is positioned on the guide rail 9 and moves linearly along the guide rail 9; the slider 7 is positioned on the guide rail 6 and moves linearly along the guide rail 6: the micro switch 2 and the micro switch The switch 5 is installed on the bottom plate 4 and cooperates with the slider 1 and the slider 7 respectively. The cam turntable 3 is formed by connecting two identical cams 11 with the drive roller A, the drive roller B, the limit roller C, and the limit roller D. The slider 1 and the slider 7 are located between the two cams 11 of the cam turntable 3 .

As shown in Figure 3, the slider 1 has a groove 19 with a certain distance H, the surface 13 and the surface 18 of the groove 19 cooperate with the driving roller A to realize the closing and opening of the common circuit breaker, the surface 12 of the groove 19 and the limit roller The cooperation of D can prevent the common circuit breaker from closing; similarly, the slider 7 has a groove 16 with a certain distance H, and the surface 14 and surface 17 of the groove 16 cooperate with the driving roller B to realize the closing and opening of the spare circuit breaker. The face 15 of 7 cooperates with the limit roller C to prevent the standby circuit breaker from switching on. In this way, only one circuit breaker is in the closed state of the dual power automatic transfer switch

As shown in Figure 3, the whole mechanism is in the state of the common circuit breaker being closed and the standby circuit breaker being opened. The driving roller A is located in the groove 19 close to the surface 13, and the limit roller C is close to the surface 15 of the slider 7. At this time, due to the existence of the limit roller C, the upward movement of the slider 7 is restricted, so the backup circuit breaker cannot close. When the common circuit breaks down, the motor 10 rotates counterclockwise, driving the cam turntable 3 to rotate counterclockwise. After the motor 10 rotates through an angle, the driving roller A turns to the A0 position, and starts to contact the surface 18 of the slider 1. Drive the slider 1 to move vertically downward; as shown in Figure 4, the driving roller A turns to the A1 position, and the mechanism of the common circuit breaker is at the "dead point" position at this time; as shown in Figure 5, the motor 10 drives the driving roller After A turns a small angle, the driving roller A turns to the position A2, the mechanism of the circuit breaker passes through the "dead point" and breaks off quickly, and the breaking speed of the circuit breaker is faster than the speed of the motor 10, so the circuit breaker will drive the sliding The block 1 quickly moves to the opening position; because the groove 19 on the slider 1 has a certain distance H, this avoids the collision between the slider 1 and the driving roller A that moves rapidly downward due to the action of the circuit breaker. At the same time, the driving roller B turns to the position B2 and starts to contact the surface 14 of the slide block 7, so that the backup circuit breaker is ready for closing. Due to the existence of the driving roller B, this saves the time required for the driving roller to turn from A2 to B2.

As shown in Figure 6, the motor 10 continues to rotate, driving the driving roller B to turn from the B2 position to the B3 position, and at this time the mechanism of the backup circuit breaker is at the "dead point" position; After B turns a small angle, the driving roller B turns to position B4, the mechanism of the circuit breaker passes the "dead point" and closes quickly, and the closing speed of the circuit breaker is faster than the speed of the motor 10, so the circuit breaker will Drive the slider 7 to quickly move to the closing position; and press the micro switch 5 to cut off the power of the motor 10. Since the groove 16 on the slider 7 has a certain distance H, this avoids the slider moving rapidly upward due to the action of the circuit breaker. Collision of block 7 with drive roller B. At the same time, the limit roller D is transferred from the D3 position to the D4 position to limit the closing of the common circuit breaker. On the contrary, the motor 10 rotates clockwise to open the standby circuit breaker and close the common circuit breaker, and the slider 1 presses the micro switch 2 to power off the motor 10 .

In a word, the sliders have a groove with a certain distance H, which avoids the life of the circuit breaker or the motor from being shortened due to the impact of the slider moving up or down rapidly and the driving roller due to the action of the circuit breaker. At the same time, due to the adoption of two driving rollers, the switching time of the dual power supply automatic switching switch is shortened.

It should be understood that: the above-mentioned embodiments are only descriptions of the present invention, rather than limitations of the present invention, and any inventions that do not exceed the spirit of the present invention fall within the protection scope of the present invention.

Claims (2)

1, the transmission mechanism of double power supply automatic switching switch, comprise motor (10), base plate (4), cam turntable (3), the slide block (1 of two symmetries, 7), power transmission shaft (8) and two sensitive switches (2 that are symmetricly set on the base plate (4), 5), described motor (10) is installed in base plate (4) and goes up and power transmission shaft (8) mechanical attachment, described power transmission shaft (8) connects with cam turntable (3), described two sensitive switches (2,5) respectively with described two slide blocks (1,7) configuration relatively, it is characterized in that described each slide block (1,7) be provided with a combined floodgate driving action face (13,14), a separating brake driving action face (18,17) and a position-limiting action face (12,15), and described two driving action faces (13 and 18,14 and 17) be provided with the groove (19 of certain distance H between, 16); Described cam turntable (3) is provided with two driven rollers (A, B) and two spacing rollers (D, C), driving action face (13 and 18,14 and 17) on described each driven roller (A, B) and the corresponding slide block cooperates, and drives described slide block (1,7) and does reciprocating linear motion; Described slide block (1,7) cooperates with the handle of circuit breaker, realizes the closing of circuit breaker, separating brake; The motion of position-limiting action face (12,15) the engagement limits slide block on described each spacing roller (D, C) and the corresponding slide block (1,7), making in two circuit breakers to have to be in a closing position.

2, the transmission mechanism of double power supply automatic switching switch as claimed in claim 1, it is characterized in that described cam turntable (3) connects formation by two identical cams (11), described two driven rollers (A, B) and two spacing rollers (D, C) are arranged between two cams (11).

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