Mechanical trip structure of circuit breaker mechanism

Abstract

The utility model discloses a mechanical anti -jump structure of circuit breaker mechanism is provided with closing half axle, closing turn -plate, closing button on the circuit breaker mechanism, operating shaft, input shaft, and closing button is cooperated with closing turn -plate, is connected with reset torsional spring no.

Description

Technical Field

[0001] This utility model relates to the field of power switch technology, and in particular to a mechanical anti-pumping structure for a circuit breaker mechanism. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and can close, carry, and interrupt current under abnormal circuit conditions within a specified time.

[0003] During operation, if a circuit breaker is closed on a faulty line, the relay protection device will trip. If the operator leaves the control switch on the close button or the contacts of the automatic reclosing device fail to reset, the circuit breaker will reclose. Because the fault on the line has not been cleared, and the relay protection device trips again, multiple "trip-and-close" cycles will occur. These repeated cycles can reduce or damage the circuit breaker's breaking capacity, and may even cause an explosion. Therefore, to prevent circuit breaker damage or explosions, anti-pumping mechanisms are typically installed on the circuit breaker mechanism.

[0004] The existing anti-pumping structure of circuit breaker mechanisms usually uses several translational push plates to drive each other to achieve anti-pumping. This anti-pumping structure is not only complex, but also requires multiple stages of transmission to achieve anti-pumping. While requiring high positional accuracy, it also reduces transmission accuracy, affecting the stability and reliability of anti-pumping. Utility Model Content

[0005] To address the shortcomings of existing anti-pumping structures in circuit breaker mechanisms, the applicant provides a mechanical anti-pumping structure for circuit breaker mechanisms with a reasonable structure, simple structure, high transmission accuracy, and high stability and reliability in anti-pumping.

[0006] The technical solution adopted in this utility model is as follows: A mechanical anti-pumping structure for a circuit breaker mechanism includes a closing half-shaft, a closing rotary plate, a closing button, an operating shaft, and an input shaft. The closing button engages with the closing rotary plate. A reset torsion spring is connected to the closing half-shaft. An anti-pumping component is mounted on the closing half-shaft, and a rotatable pawl is mounted on the anti-pumping component. A reset torsion spring is connected to the pawl, which includes a pawl portion and a transmission portion. The closing rotary plate is rotatably mounted on the closing half-shaft and has a ratchet with toothed grooves that engage with the pawl portion for transmission. When the closing rotary plate is pushed to rotate by the closing button, the ratchet pushes the pawl and the closing half-shaft to rotate through the toothed grooves. A clutch crank arm is mounted on the input shaft, and the clutch crank arm engages with the transmission portion of the pawl for transmission. During the closing process, the clutch crank arm disengages the pawl from the ratchet arm.

[0007] As a further improvement to the above technical solution: The anti-jump component includes a connecting plate sleeved on the closing half-shaft, the connecting plate being configured to not rotate relative to the closing half-shaft, and a pawl rotatably connected to the connecting plate.

[0008] A circumferential limiting structure is provided between the connecting plate and the closing half shaft.

[0009] A connecting shaft is connected to the connecting plate, and a pawl and a reset torsion spring are set on the connecting shaft; a circumferential limiting structure is provided between the connecting plate and the connecting shaft.

[0010] A locating pin is provided on the connecting shaft, and one end of the reset torsion spring is connected to the pawl, and the other end is connected to the locating pin.

[0011] The connecting plate includes a swing arm and a limit arm, and the connecting shaft is connected to the swing arm; the circuit breaker mechanism is provided with a limit pin corresponding to the limit arm, and the limit arm and the limit pin cooperate to achieve the limit.

[0012] The pawl and transmission part of the pawl are V-shaped, with the pawl extending towards the closing turntable and the transmission part extending towards the clutch crank arm.

[0013] The closing rotary plate is rotatably mounted on the closing half-shaft via a sleeve, and a ratchet is provided on the sleeve.

[0014] An L-shaped rotating plate is fixedly connected to the sleeve wall, and the rotating plate cooperates with the closing button and the limit pin.

[0015] A positioning pin is provided on the closing half shaft, and one end of the reset torsion spring is connected to the positioning pin and the other end is connected to the fixing part of the circuit breaker mechanism.

[0016] The beneficial effects of this utility model are as follows: This invention features an anti-jump component on the closing half-shaft. The transmission is achieved through the cooperation of the pawl of the anti-jump component with the ratchet of the closing turntable and the clutch crank arm on the input shaft. The structure is simple, and the pawl, ratchet, and clutch crank arm are all single-stage direct transmissions, resulting in fewer transmission stages, higher transmission accuracy, and greater stability and reliability of the anti-jump mechanism. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention from one perspective.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0019] Figure 3 This is a schematic diagram showing the connection between the closing half-shaft, the closing rotary plate, and the anti-jump component.

[0020] Figure 4 for Figure 3 A sectional view of section AA in the middle.

[0021] Figure 5 This is an exploded view of the closing half-shaft, connecting plate, and connecting shaft.

[0022] Figure 6 This is a schematic diagram of the anti-pumping component during tripping.

[0023] Figure 7 This is a schematic diagram of the anti-pumping component when the closing button is pressed.

[0024] Figure 8 This is a schematic diagram of the anti-pumping component during the closing operation.

[0025] Figure 9 This is a schematic diagram of the anti-pumping component after the circuit is closed.

[0026] In the picture: 100. Front partition; 200. Middle partition; 300. Support column; 1. Anti-jump assembly; 11. Connecting plate; 111. Swing arm; 112. Limiting arm; 113. First connecting hole; 1131. First flat surface; 114. Second connecting hole; 1141. Second flat surface; 12. Pawl; 121. Pawl part; 122. Transmission part; 13. Connecting shaft; 131. Third flat surface; 14. Second reset torsion spring; 15. Second positioning pin; 2. Closing half-shaft; 21. Rotary plate connecting part; 22. Anti-jump connecting part; 221. Fourth flat surface; 3. Closing turntable; 31. Sleeve section; 32. Turntable section; 33. Ratchet; 331. Tooth groove; 4. Closing button; 5. Reset torsion spring 1; 6. Positioning pin 1; 7. Limit pin; 8. Operating shaft; 9. Input shaft; 91. Clutch crank arm. Detailed Implementation

[0027] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0028] like Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, this utility model provides a mechanical anti-pumping structure for a circuit breaker mechanism. The circuit breaker mechanism is provided with a front partition 100 and a middle partition 200 spaced apart, and a plurality of support columns 300 are provided between the front partition 100 and the middle partition 200 for support. A closing half-shaft 2, an operating shaft 8, and an input shaft 9 are inserted into the front partition 100 and the middle partition 200. An anti-pumping component 1, a closing rotary plate 3, a closing button 4, and a limit pin 7 are provided on the side of the front partition 100 opposite to the middle partition 200. A rotary plate connecting part 21 and an anti-pumping component connecting part 22 are provided on the closing half-shaft 2. The anti-pumping component 1 is provided on the anti-pumping component connecting part 22 of the closing half-shaft 2. The closing rotary plate 3 is sleeved on the upper rotary plate connecting part 21 of the closing half-shaft 2. The closing button 4 cooperates with the closing rotary plate 3. Pressing the closing button 4 can drive the closing rotary plate 3 to rotate, thereby driving the closing half-shaft 2 and its anti-pumping component to rotate. The limit pin 7 is used to limit the closing rotary plate 3 and the anti-pumping component. A reset torsion spring 5 is sleeved on the shaft portion of the closing half-shaft 2 between the front partition 100 and the middle partition 200. A positioning pin 6 is radially inserted into the closing half-shaft 2. One end of the reset torsion spring 5 is connected to the positioning pin 6, and the other end is connected to the fixing part of the circuit breaker mechanism (not shown in the figure). The reset torsion spring 5 can drive the closing half-shaft 2 to reset. A clutch crank arm 91 is fixedly sleeved on the input shaft 9. The clutch crank arm 91 can rotate with the input shaft 9. The clutch crank arm 91 cooperates with the anti-jump component 1 for transmission.

[0029] like Figure 1 , Figures 3 to 5 As shown, the anti-jump assembly 1 includes a connecting plate 11, a pawl 12, a connecting shaft 13, a second reset torsion spring 14, and a second positioning pin 15. The connecting plate 11 is sleeved on the closing half shaft 2, and the connecting shaft 13 is fixedly inserted into the connecting plate 11. The pawl 12 and the second reset torsion spring 14 are sleeved on the connecting shaft 13. The pawl 12 can rotate relative to the connecting shaft 13. The second positioning pin 15 is radially inserted into the connecting shaft 13. One end of the second reset torsion spring 14 is connected to the pawl 12, and the other end is connected to the second positioning pin 15.

[0030] like Figures 3 to 5As shown, the connecting plate 11 includes a V-shaped swing arm 111 and a limiting arm 112. A connecting shaft 13 is connected to the swing arm 111, and the limiting arm 112 cooperates with the limiting pin 7 to achieve limiting. A first connecting hole 113 is provided in the center of the connection between the swing arm 111 and the limiting arm 112. The first connecting hole 113 is sleeved on the anti-jump connecting part 22 of the closing half shaft 2. A first flat surface 1131 is provided on the hole wall of the first connecting hole 113, and a fourth flat surface 221 is provided on the outer peripheral surface of the anti-jump connecting part 22 of the closing half shaft 2. The first flat surface 1131 and the fourth flat surface 221 cooperate to form a circumferential limiting structure to limit the connecting plate 11 circumferentially and prevent the connecting plate 11 from rotating relative to the closing half shaft 2. A second connecting hole 114 is provided on the part of the swing arm 111 near the outer end, and the connecting shaft 13 is inserted into the second connecting hole 114. A second flat surface 1141 is provided on the hole wall on both sides of the second connecting hole 114, and a third flat surface 131 is provided on the connecting shaft 13. The second flat surface 1141 and the third flat surface 131 cooperate to form a circumferential limiting structure to limit the connecting shaft 13 circumferentially and prevent the connecting shaft 13 from rotating relative to the connecting plate 11.

[0031] like Figure 3 , Figures 6 to 9 As shown, the pawl 12 is a V-shaped part, with a pawl part 121 on one side and a transmission part 122 on the other side. The pawl part 121 extends toward the closing rotary plate 3 and cooperates with the closing rotary plate 3 for transmission. The transmission part 122 extends toward the clutch crank arm 91 and cooperates with the clutch crank arm 91 for transmission.

[0032] like Figure 1 , Figure 3 As shown, the closing rotary plate 3 is rotatably mounted on the rotary plate connecting part 21 of the closing half shaft 2 via the sleeve part 31. An L-shaped rotary plate part 32 is fixedly connected to the sleeve part 31, and the rotary plate part 32 cooperates with the closing button 4 and the limit pin 7. A ratchet 33 is provided on the sleeve part 31 corresponding to the pawl 12. The ratchet 33 has a toothed groove 331, and the pawl part 121 of the pawl 12 cooperates with the toothed groove 331 of the ratchet 33. Figure 6 , Figure 7 As shown, when the circuit breaker mechanism is in the open state, or when the closing operation has not yet started after pressing the closing button 4, the pawl 121 of the pawl 12 is engaged in the tooth groove 331 of the ratchet 33; Figure 8 , Figure 9 As shown, during or after the closing operation, the pawl 121 of the pawl 12 disengages from the tooth groove 331 of the ratchet 33.

[0033] In actual use, (1) when the circuit breaker mechanism is in the open state: such as Figure 6As shown, the limiting arm 112 of the connecting plate 11 of the anti-jump component 1 and the rotating plate part 32 of the closing rotating plate 3 abut against the limiting pin 7, the pawl part 121 of the pawl 12 is locked in the tooth groove 331 of the ratchet 33 of the closing rotating plate 3, and the transmission part 122 of the pawl 12 does not contact the clutch crank arm 91. (2) When the closing preparation is complete and the operating shaft 8 is not in operation: such as Figure 7 As shown, after the mechanism has completed energy storage, press the closing button 4 to push the closing turntable 3 to rotate counterclockwise. The closing turntable 3, through the tooth groove 331, cooperates with the pawl 12 to push the anti-jump component 1 and the closing half shaft 2 to rotate counterclockwise. At the same time, the pawl 12 rotates around the connecting shaft 13. The transmission part 122 of the pawl 12 does not contact the clutch crank arm 91. (3) Start closing. During the closing process: Figure 8 As shown, the operating shaft 8 rotates to perform the closing operation, and through the linkage structure (not shown in the figure), it drives the input shaft 9 to rotate clockwise. During the rotation of the clutch crank arm 9, it hits the transmission part 122 of the pawl 12, forcing the pawl 12 to rotate counterclockwise around the connecting shaft 13. The pawl 12 disengages from the tooth groove 331 of the ratchet 33. (4) After closing: Figure 9 As shown, the operating shaft 8 continues to rotate to the closed position. The clutch crank arm 91 follows the input shaft 9 and continues to rotate until it disengages from the transmission part 122 of the pawl 12. The reset torsion spring 15 drives the closing half shaft 2 and the anti-jump component 1 to reset themselves. At the same time, the pawl 12 resets itself under the drive of the reset torsion spring 2 14. At this time, since the pawl 12 of the anti-jump component 1 has disengaged from the ratchet 33 of the closing turntable 3, and the closing half shaft 2 has been reset, even if the operator continues to press the closing button 4, the mechanism will not re-close after re-charging, thus preventing the mechanism from "jumping" and avoiding damage to the circuit breaker or an explosion accident.

[0034] This utility model sets an anti-jump component 1 on the closing half shaft 2. The transmission is achieved by the pawl 12 of the anti-jump component 1 cooperating with the ratchet 33 of the closing turn plate 3 and the clutch crank arm 91 on the input shaft 9. The structure is simple, and the pawl 12, ratchet 33 and clutch crank arm 91 are all direct single-stage transmissions. The number of transmission stages is small, the transmission accuracy is high, and the stability and reliability of anti-jump are higher.

[0035] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A mechanical anti-pumping structure for a circuit breaker mechanism, wherein the circuit breaker mechanism is provided with a closing half-shaft (2), a closing rotary plate (3), a closing button (4), an operating shaft (8), and an input shaft (9), wherein the closing button (4) cooperates with the closing rotary plate (3); characterized in that: A reset torsion spring (5) is connected to the closing half shaft (2); An anti-jump component (1) is provided on the closing half shaft (2). A rotatable pawl (12) is provided on the anti-jump component (1). A reset torsion spring (14) is connected to the pawl (12). The pawl (12) includes a pawl part (121) and a transmission part (122). The closing turntable (3) is rotatably mounted on the closing half shaft (2). A ratchet (33) is provided on the closing turntable (3). The ratchet (33) has a toothed groove (331). The toothed groove (331) cooperates with the pawl (121) of the pawl (12) for transmission. When the closing turntable (3) is pushed to rotate by the closing button (4), the ratchet (33) pushes the pawl (12) and the closing half shaft (2) to rotate through the toothed groove (331). The input shaft (9) is equipped with a clutch crank arm (91), which works in conjunction with the transmission part (122) of the pawl (12) for transmission; during the closing process, the clutch crank arm (91) disengages the pawl (12) from the ratchet (33).

2. The mechanical trip unit of claim 1, wherein: The anti-jump assembly (1) includes a connecting plate (11) sleeved on the closing half shaft (2), the connecting plate (11) being configured to not rotate relative to the closing half shaft (2), and a pawl (12) being rotatably connected to the connecting plate (11).

3. The mechanical trip unit of claim 2, wherein: A circumferential limiting structure is provided between the connecting plate (11) and the closing half shaft (2).

4. The mechanical anti-pumping structure of the circuit breaker mechanism according to claim 2, characterized in that: A connecting shaft (13) is connected to the connecting plate (11), and a pawl (12) and a reset torsion spring (14) are sleeved on the connecting shaft (13); a circumferential limiting structure is provided between the connecting plate (11) and the connecting shaft (13).

5. The mechanical trip unit of claim 4, wherein: A positioning pin is provided on the connecting shaft (13), and one end of the reset torsion spring (14) is connected to the pawl (12) and the other end is connected to the positioning pin.

6. The mechanical anti-pumping structure of the circuit breaker mechanism according to claim 2, characterized in that: The connecting plate (11) includes a swing arm (111) and a limit arm (112), and the connecting shaft (13) is connected to the swing arm (111); the circuit breaker mechanism is provided with a limit pin (7) corresponding to the limit arm (112), and the limit arm (112) and the limit pin (7) cooperate to achieve the limit.

7. The mechanical anti-pumping structure of the circuit breaker mechanism according to claim 1, characterized in that: The pawl (121) and transmission part (122) of the pawl (12) are V-shaped. The pawl (121) extends toward the closing turntable (3) and the transmission part (122) extends toward the clutch crank arm (91).

8. The mechanical anti-pumping structure of the circuit breaker mechanism according to claim 1, characterized in that: The closing turntable (3) is rotatably mounted on the closing half shaft (2) via the sleeve part (31), and the ratchet (33) is mounted on the sleeve part (31).

9. The mechanical anti-pumping structure of the circuit breaker mechanism according to claim 6 or 8, characterized in that: An L-shaped rotating plate (32) is fixedly connected to the sleeve part (31) on the sleeve wall. The rotating plate part (32) cooperates with the closing button (4) and the limit pin (7).

10. The mechanical trip free mechanism of a circuit breaker mechanism according to claim 1, wherein: The closing half shaft (2) is provided with a positioning pin (6), and one end of the reset torsion spring (5) is connected to the positioning pin (6) and the other end is connected to the fixing part of the circuit breaker mechanism.

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