Operating mechanism of dual-power change-over switch

Abstract

A dual-power change-over switch operating mechanism belongs to the technical field of low-voltage apparatuses. Which comprises a turntable and a transmission plate, the turntable drives the transmission plate to rotate when rotating, and a driving shaft is eccentrically arranged on the turntable, and is characterized in that a matching groove facing an opening of the turntable is formed in the transmission plate, one of two opposite inner walls of the matching groove forms a switching-on transmission surface, and the other inner wall forms a switching-off transmission surface. One end of one of the two opposite inner walls, which is far away from the opening, is deflected towards one side of the closing transmission surface to form an inclined opening transmission surface, and the driving shaft pushes the opening transmission surface to enable the execution switch of the dual-power change-over switch to be opened. The operating mechanism has the advantages of effectively reducing the reaction torque to the operating mechanism when the circuit breaker is opened, reducing the force characteristic requirement of an electromagnetic system of the operating mechanism, improving the reliability of the operating mechanism and reducing the cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to a dual-power conversion switch operating mechanism. Background Art

[0002] Dual power transfer switches are used in power supply systems. When one power source fails, it can prevent the failed power source from supplying power to the load, and reliably select another power source to be put into operation to ensure the continuity of power supply. It is generally used in more important places, such as hospitals, airports, docks, banks, etc.

[0003] The dual power conversion switch operating mechanism adopts an electromagnetically driven rotating transmission plate structure to drive the action (including closing, opening, and re-closing) of its actuator switch (such as a circuit breaker). As the current specification increases, the operating force of the actuator switch also increases accordingly, and the operating force that the operating mechanism needs to overcome increases accordingly, which puts forward greater force characteristic requirements on the electromagnetic system of the operating mechanism, and the reliability of the operating mechanism is reduced accordingly.

[0004] In view of the above prior art, it is necessary to reasonably improve the existing dual power conversion switch operating mechanism to solve the above problems. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0005] The purpose of the utility model is to provide a dual power conversion switch operating mechanism, which can effectively reduce the reaction torque on the operating mechanism when executing the switch opening, reduce the force characteristic requirements of the operating mechanism on the electromagnetic system, and improve the reliability of the operating mechanism.

[0006] The purpose of the utility model is achieved in this way. A dual power conversion switch operating mechanism includes a turntable and a transmission plate. When the turntable rotates, the transmission plate is driven to rotate. A driving shaft is eccentrically arranged on the turntable. A matching groove facing the turntable opening is arranged on the transmission plate. One of the two opposite inner walls of the matching groove is constituted as a closing transmission surface. The driving shaft pushes the closing transmission surface to close the execution switch of the dual power conversion switch. One end of the other inner wall of the two opposite inner walls away from the opening is deflected toward one side of the closing transmission surface and constitutes an inclined opening transmission surface. The driving shaft pushes the opening transmission surface to open the execution switch of the dual power conversion switch.

[0007] In one embodiment of the present invention, the angle formed between the opening transmission surface and the closing transmission surface is between 15° and 50°.

[0008] In another embodiment of the utility model, the transmission plate is a pair arranged on both sides of the turntable, wherein the angle a formed between the opening transmission surface and the closing transmission surface on the transmission plate located on the left side of the turntable is smaller than the angle b formed between the opening transmission surface and the closing transmission surface on the transmission plate located on the right side of the turntable.

[0009] In another embodiment of the utility model, an angle a formed between the opening transmission surface and the closing transmission surface on the transmission plate located on the left side of the turntable is between 15° and 25°, and an angle b formed between the opening transmission surface and the closing transmission surface on the transmission plate located on the right side of the turntable is between 40° and 50°.

[0010] In yet another embodiment of the present invention, the transmission plates are a pair disposed on both sides of the rotating disk, and the angles formed between the opening transmission surfaces and the closing transmission surfaces on the pair of transmission plates are the same.

[0011] In a further embodiment of the present invention, the same included angle formed between the opening transmission surface and the closing transmission surface on the transmission plates on both sides is between 40° and 50°.

[0012] In another embodiment of the utility model, one end of the other inner wall of the two opposite inner walls close to the opening is configured as a re-engaging transmission surface, and before the driving shaft pushes the closing transmission surface to close the executive switch of the dual power conversion switch, the driving shaft pushes the closing transmission surface to make the executive switch of the dual power conversion switch re-engage.

[0013] The utility model adopts the above structure, which has the beneficial effect of setting the opening transmission surface and the closing transmission surface on the transmission plate of the operating mechanism to a certain angle, effectively reducing the reaction torque on the operating mechanism when the switch is opened, reducing the force characteristic requirements of the electromagnetic system of the operating mechanism, improving the reliability of the operating mechanism, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the angle between the closing transmission surface and the opening transmission surface of the left transmission plate when the rotary disk cooperates with the left transmission plate when the utility model adopts a four-pole molded case circuit breaker;

[0015] Figure 2 It is a schematic diagram of the torque of the reaction force exerted on the opening transmission surface by the driving shaft when the rotating disk cooperates with the transmission plate on the left side when the four-pole molded case circuit breaker is used in the utility model;

[0016] Figure 3 It is a schematic diagram of the angle between the closing transmission surface and the opening transmission surface of the right transmission plate when the rotary disk cooperates with the right transmission plate when the utility model adopts a four-pole molded case circuit breaker;

[0017] Figure 4It is a schematic diagram of the torque of the reaction force exerted on the opening transmission surface by the driving shaft when the rotating disk cooperates with the transmission plate on the right side when the four-pole molded case circuit breaker is adopted in the utility model.

[0018] In the figure: 1. turntable, 11. drive shaft; 2. transmission plate, 20. matching groove, 21. closing transmission surface, 22. opening transmission surface, 23. re-locking transmission surface. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0020] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are with reference to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solution provided by the utility model.

[0021] The utility model relates to a dual power conversion switch, which comprises an operating mechanism and an execution switch, wherein the execution switches are a pair and are arranged on both sides of the operating mechanism. The first execution switch on the left side is used to control the connection and disconnection of the first power supply, and the second execution switch on the right side is used to control the connection and disconnection of the second power supply.

[0022] The operating mechanism includes a bracket, a turntable 1 rotatably arranged on the bracket, and a pair of transmission plates 2 arranged on both sides of the turntable 1. The pair of transmission plates 2 are rotatably arranged on the bracket, one end of which cooperates with the turntable 1 and the other end cooperates with the execution switch handle.

[0023] See also Figure 1A pair of drive shafts 11 are eccentrically arranged on the turntable 1, and the two drive shafts 11 are dispersedly arranged on the same circumference of the turntable 1. Each drive shaft 11 is matched with a corresponding transmission plate 2. The transmission plate 2 is provided with a matching groove 20 at one end close to the turntable 1, and the matching groove 20 opens toward the turntable 1. One of the two opposite inner walls of the matching groove 20 constitutes a closing transmission surface 21, and the drive shaft 11 pushes the closing transmission surface 21, and the transmission plate 2 rotates, thereby driving the handle of the execution switch to close the execution switch; the end of the other inner wall of the two opposite inner walls away from the opening is deflected to the side of the closing transmission surface 21 and constitutes an inclined opening transmission surface 22, and the drive shaft 11 pushes the opening transmission surface 22, and the transmission plate 2 rotates in the opposite direction to the above-mentioned closing direction of the execution switch, thereby driving the handle of the execution switch to open the execution switch. The above-mentioned gate-opening transmission surface 22 is inclined. It can be seen from the figure that after the matching groove 20 extends a distance in the direction of the handle with the same width on the transmission plate 2, the width gradually narrows, and the bottom width is significantly smaller than the middle width. That is, the two opposite inner walls of the matching groove 20 extend roughly parallel from the groove opening to the middle of the groove, and the upper wall begins to deflect near the bottom of the groove, and the distance between the two walls gradually decreases.

[0024] One end of the other inner wall of the two opposite inner walls close to the opening is configured as a re-engaging transmission surface 23. Before the driving shaft 11 pushes the closing transmission surface 21 to close the executive switch of the dual power conversion switch, the driving shaft 11 pushes the closing transmission surface 21 to re-engage the executive switch of the dual power conversion switch.

[0025] In essence, the closing transmission surface 21, the opening transmission surface 22 and the re-engaging transmission surface 23 can be understood as follows: the opening on the end of the transmission plate 2 close to the turntable 1, the plane of the lower wall of the opening extending in the direction away from the turntable 1 constitutes the closing transmission surface 21, the plane of the upper wall of the opening extending in the direction away from the turntable 1, the plane is deflected toward the side close to the closing transmission surface 21 at the end away from the opening to form an inclined plane, and the inclined plane is the opening transmission surface 22, and the end of the upper wall connected to the opening transmission surface 22 close to the opening constitutes the re-engaging transmission surface 23.

[0026] In this embodiment, since the actuator switch is a pair of four-pole molded case circuit breakers, the four-pole circuit breakers are fixed on both sides of the operating mechanism in a position state of four phases ABCN from left to right. Therefore, preferably, the matching grooves 20 of the transmission plates corresponding to the circuit breakers on the left and right sides have different structures, specifically: the angle a formed between the opening transmission surface 22 and the closing transmission surface 21 on the transmission plate 2 located on the left side of the turntable 1 is smaller than the angle b formed between the opening transmission surface 22 and the closing transmission surface 21 on the transmission plate 2 located on the right side of the turntable 1. Preferably, the angle a is between 15° and 25°, and the angle b is between 40° and 50°. Of course, for the above-mentioned actuator switch being a pair of four-pole molded case circuit breakers, it is also possible to set the angle a and the angle b to the same angle, for example, both are between 15° and 50°.

[0027] Continue to see Figure 1 Combined with Figure 2 , the turntable 1 rotates clockwise, and its driving shaft 11 pushes the opening transmission surface 22 on the left transmission plate 2, driving the left transmission plate 2 to open the left circuit breaker, and the circuit breaker opening force Fopening reacts on the left transmission plate 2 through the handle, and the opening transmission surface 22 of the left transmission plate 2 contacts the driving shaft 11 of the turntable 1 and generates a force F1. The force arm of F1 and the rotation center of the turntable 1 is L1, and the opening resistance torque M1=F1×L1. The turntable 1 needs to overcome the above resistance torque M1 to drive the circuit breaker to open.

[0028] See also Figure 3 , Figure 4 , the turntable 1 rotates counterclockwise, and its driving shaft 11 pushes the opening transmission surface 22 on the right transmission plate 2, driving the right transmission plate 2 to open the right circuit breaker, and the circuit breaker opening force Fopening reacts on the right transmission plate 2 through the handle, and the opening transmission surface 22 of the right transmission plate 2 contacts the driving shaft 11 of the turntable 1 and generates a force F2. The force arm of F2 and the rotation center of the turntable 1 is L2, and the opening resistance torque M2=F2×L2. The turntable 1 needs to overcome the above resistance torque M2 to drive the circuit breaker to open.

[0029] Regardless of whether Figure 1 , Figure 2 The left side of the drive plate 2 is driven to open the left side circuit breaker. Figure 3 , Figure 4The driving of the transmission plate 2 on the right side realizes the opening of the circuit breaker on the right side. Compared with the existing circuit breaker opening action (directly using the other inner wall as the opening transmission surface, that is, not forming the opening transmission surface 22 through deflection), the resistance torque during opening is reduced due to the shortening of the force arm. Specifically, if the other inner wall is directly used as the opening transmission surface to open the circuit breaker on the left side, the drive shaft 11 acts on the other inner wall without deflection. Since the other inner wall without deflection basically extends in the horizontal direction, the opening reaction force at this time is a basically vertical force of the vertical action surface, and its force arm is the distance from the rotation center of the turntable to the left drive shaft 11, which is obviously greater than L1. Therefore, by using the deflected surface as the opening action surface 22, the opening reaction torque is smaller than the opening reaction torque in the prior art that directly uses the other inner wall as the opening transmission surface without deflection to form the opening transmission surface. Figure 3 , Figure 4 The difference between L2 and the lever arm of the brake counter torque in the prior art (the distance from the rotating center of the turntable to the driving shaft 11 on the right side) will be more obvious.

[0030] It should be noted that if the actuator is a pair of three-pole molded case circuit breakers, the three-pole circuit breakers are fixed on both sides of the operating mechanism in the position states of ABC from left to right, and the left and right sides correspond to the same structure of the matching grooves 20 of the transmission plates provided on the circuit breakers, specifically: the transmission plates 2 are a pair of transmission plates 2 respectively provided on both sides of the rotating disk 1, and the angles formed between the opening transmission surfaces 22 and the closing transmission surfaces 21 on the pair of transmission plates 2 are the same. Preferably, the angle is between 45° and 50°.

[0031] Preferably, one end of the other inner wall of the two opposite inner walls close to the opening is configured as a re-engaging transmission surface 23, see Figure 1 The other inner wall, i.e., the upper wall shown in the figure, is deflected in the direction away from the lower wall at the opening of the driving groove 20, and the inflection point between the deflected section and the upper arm forms a re-engagement transmission surface 23. Before the driving shaft 11 acts on the closing transmission surface 21 to close the actuator switch, the re-engagement transmission surface 23 is pushed by the driving shaft 11 to re-engage the actuator switch of the dual power conversion switch.

[0032] One end of the other inner wall of the two opposite inner walls (the inner wall on which the opening transmission surface is deflected) near the opening is formed as a re-engagement transmission surface 23. Before the drive shaft 11 acts on the closing transmission surface 21 to close the actuator switch, the drive shaft 11 acts on the re-engagement transmission surface 23 to re-engage the actuator switch. For the specific working process, please refer to Figure 4 ,exist Figure 4On the basis of the position, the turntable 1 continues to rotate counterclockwise, and the right drive shaft 11 acts on the opening transmission surface 22 on the right transmission plate 2 until the right circuit breaker is opened. The turntable 1 continues to rotate counterclockwise and then disengages from the transmission relationship with the right transmission plate 2, that is, the right drive shaft 2 will be disengaged from the matching groove 20. At this time, the dual power conversion switch is in the double opening position where both circuit breakers are opened. The turntable further rotates counterclockwise, and the left drive shaft 11 will establish a transmission relationship with the matching groove 20 of the left transmission plate 2. The left drive shaft 11 first acts on the re-locking drive surface 23 at the opening of the matching groove 20, so that the left transmission plate 2 rotates counterclockwise by a certain angle. The counterclockwise rotation action drives the handle of the left circuit breaker to move downward, that is, the handle will move further downward in the opening position, and the circuit breaker will be re-locked. The turntable 1 continues to rotate counterclockwise, and the left drive shaft 11 will pass over the opening of the matching groove 20 and push the lower side wall of the matching groove 20, that is, the closing transmission surface 21, to drive the left circuit breaker to close. As a result, the re-locking operation is performed before the driving execution switch is closed, ensuring the smooth completion of the closing action during the rotation of the dual power conversion switch.

[0033] Of course, the execution switch is not limited to the molded case circuit breaker given in the above embodiment, but can also be an electrical appliance such as an isolating switch that only has open and closed positions. If the isolating switch is used as the execution switch of the dual power conversion switch, there is no need to set the re-locking drive surface 23.

Claims

1. A dual power switch operating mechanism, comprising a rotating disk (1) and a transmission plate (2), wherein the rotating disk (1) drives the transmission plate (2) to rotate when the rotating disk (1) rotates, and a driving shaft (11) is eccentrically arranged on the rotating disk (1), characterized in that: The transmission plate (2) is provided with a matching groove (20) opening toward the rotating disk (1); one of the two opposite inner walls of the matching groove (20) is formed as a closing transmission surface (21); the driving shaft (11) pushes the closing transmission surface (21) to close the actuator switch of the dual power conversion switch; and one end of the other inner wall of the two opposite inner walls, away from the opening, is deflected toward the closing transmission surface (21) and is formed as an inclined opening transmission surface (22); the driving shaft (11) pushes the opening transmission surface (22) to open the actuator switch of the dual power conversion switch.

2. A dual power conversion switch operating mechanism according to claim 1, characterized in that: The angle formed between the opening transmission surface (22) and the closing transmission surface (21) is between 15° and 50°.

3. The dual power conversion switch operating mechanism according to claim 2 is characterized in that: The transmission plate (2) is a pair of plates disposed on both sides of the rotating disk (1), wherein an angle a formed between an opening transmission surface (22) and a closing transmission surface (21) on the transmission plate (2) located on the left side of the rotating disk (1) is smaller than an angle b formed between an opening transmission surface (22) and a closing transmission surface (21) on the transmission plate (2) located on the right side of the rotating disk (1).

4. The dual power switch operating mechanism according to claim 3, characterized in that: An included angle a formed between an opening transmission surface (22) and a closing transmission surface (21) on the transmission plate (2) located on the left side of the rotating disk (1) is between 15° and 25°, and an included angle b formed between an opening transmission surface (22) and a closing transmission surface (21) on the transmission plate (2) located on the right side of the rotating disk (1) is between 40° and 50°.

5. The dual power switch operating mechanism according to claim 3, characterized in that: The transmission plates (2) are a pair disposed on both sides of the rotating disk (1), and the angles formed between the opening transmission surfaces (22) and the closing transmission surfaces (21) on the pair of transmission plates (2) are the same.

6. A dual power switch operating mechanism according to claim 5, characterized in that: The same included angle formed between the opening transmission surface (22) and the closing transmission surface (21) on the transmission plates (2) on both sides is between 40° and 50°.

7. The dual power switch operating mechanism according to claim 1, characterized in that: One end of the other inner wall of the two opposing inner walls close to the opening is formed as a re-engaging transmission surface (23). Before the driving shaft (11) pushes the closing transmission surface (21) to close the actuating switch of the dual power conversion switch, the driving shaft (11) pushes the closing transmission surface (21) to re-engage the actuating switch of the dual power conversion switch.

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