Side-mounted small vacuum circuit breaker

Abstract

The invention discloses a side-mounted small vacuum circuit breaker, which comprises a vacuum arc-extinguishing chamber and an operation box, and is characterized in that the vacuum arc-extinguishing chamber is mounted behind the operation box through an insulating base, and the vacuum arc-extinguishing chamber is linked with an operation mechanism in the operation box; the operating mechanism comprises an energy storage main shaft, an energy storage crank arm, an energy storage spring and an energy storage handle, the energy storage main shaft is rotationally connected into the operating box, the energy storage crank arm is installed at the left end of the energy storage main shaft, the two ends of the energy storage spring are connected to the energy storage crank arm and the operating box respectively, and the energy storage handle drives the energy storage main shaft to rotate through a driving shaft; and a one-way bearing is arranged between the energy storage handle and the driving shaft. An efficient energy storage mode with a small reduction ratio and a labor-saving energy storage mode with a large reduction ratio are combined, the advantages of the two energy storage modes are utilized, the two factors of energy storage efficiency and labor saving are considered, and therefore the problem that torque needed by an existing manual energy storage tail end is too large is solved.

Description

Technical Field

[0001] This invention belongs to the field of power distribution switch control technology, specifically relating to a side-mounted miniature vacuum circuit breaker. Background Technology

[0002] Vacuum circuit breakers are essential equipment in smart grid systems, widely used in power plants, substations, and distribution stations to control and protect electrical equipment such as transmission lines, transformers, and capacitor banks, ensuring the safe and stable operation of the power system. Vacuum circuit breakers are mainly installed in high and low voltage switchgear. Conventional vacuum circuit breakers are relatively large. To accommodate side installation, a side-mounted miniature vacuum circuit breaker has been developed. The arc-extinguishing chamber and operating mechanism are arranged horizontally or at an angle, and it is installed from the side of the switchgear. The specific structure of the side-mounted miniature vacuum circuit breaker is as follows: The system comprises a vacuum interrupter, an operating mechanism, and a conductive circuit. The operating mechanism, housed within the enclosure, includes a tripping knob, a closing knob, a stop, an energy storage indicator, and options for manual and electric energy storage. Electric energy storage utilizes a motor that drives the energy storage shaft via a reduction gear set. A crank at one end of the shaft oscillates eccentrically, pulling a storage spring to store energy. Once in the stored state, a stop keeps the spring stretched, triggered by either the tripping or closing knob. Manual energy storage operates on the same principle, but uses a handle to rotate the energy storage shaft. Each press of the handle rotates the shaft by a certain angle. Because the handle has a one-way bearing, the shaft does not rotate in the opposite direction during the return stroke. Therefore, multiple presses of the handle are sufficient until the spring reaches its maximum extension to complete energy storage. When energy storage is complete, the energy storage completion indicator switch (also known as an "energy storage auxiliary switch" or "energy storage micro switch") will respond.

[0003] Both the manual and electric energy storage systems mentioned above are equipped with one-way bearings, and they operate independently without affecting each other. However, the problem with manual energy storage is that each time the handle is pressed down, the energy storage spindle correspondingly stretches the energy storage spring. As the spring stretches longer, the torque required to press down the handle increases, making it more strenuous. Especially near the end of energy storage, the torque required for the last 2-3 presses of the handle increases significantly, several times over. Therefore, it is necessary to address the problem of excessive torque required at the end of the manual energy storage operation in side-mounted miniature vacuum circuit breakers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a side-mounted miniature vacuum circuit breaker, comprising a vacuum interrupter and an operating box. The vacuum interrupter is mounted at the rear of the operating box via an insulating base, and is linked to the operating mechanism inside the operating box. The operating mechanism includes an energy storage main shaft, an energy storage crank arm, an energy storage spring, and an energy storage handle. The energy storage main shaft is rotatably connected inside the operating box, the energy storage crank arm is mounted at the left end of the energy storage main shaft, and the two ends of the energy storage spring are respectively connected to the energy storage crank arm and the operating box. The energy storage handle drives the energy storage main shaft to rotate via a drive shaft, and a one-way bearing is provided between the energy storage handle and the drive shaft. The drive shaft includes a left half-tube and a right half-tube, wherein the right half-tube and the left half-tube are rotatably connected to a longitudinal partition inside the operating box via rolling bearings, and the right half-tube is connected to the intermediate gear of the energy storage main shaft via a drive gear, and the right half-tube is connected to the energy storage handle via a one-way bearing to form a one-way transmission connection. A coaxial torque amplifier is provided between the left and right halves of the tube. The left and right ends of the torque amplifier are respectively provided with an output shaft and an input shaft. The left and right halves, the output shaft and the input shaft are respectively provided with axially extending inner holes, and each inner hole is provided with an internal spline. The right half extends to the right and penetrates the side wall of the control box. It includes a control shaft located in the inner hole. The control shaft is provided with multiple external splines. The right end of the control shaft extends from the right end of the right half. By axially moving the control shaft and engaging the internal splines with different external splines, the left and right halves can be connected or the torque amplifier can be connected between the left and right halves.

[0005] A preferred embodiment of the side-mounted miniature vacuum circuit breaker in this invention is as follows: the control shaft includes a left half control tube and a right half control tube, with the right end of the left half control tube detachably connected to the left end of the right half control tube. Specifically, the right end of the left half control tube has a keyway extending circumferentially, and the left end of the keyway has an L-shaped key adapted to the keyway. The L-shaped key is inserted into the keyway, and the right half control tube rotates in the energy storage direction, thereby locking the L-shaped key in the keyway. Rotation of the right half control tube in the energy storage direction is forward rotation, and vice versa. After the L-shaped key is inserted into the keyway, the right half control tube drives the left half control tube to rotate forward, keeping the L-shaped key locked to the keyway, and the right half control tube and left half control tube do not separate. When the right half control tube rotates in reverse, the L-shaped key exits the keyway, and then the right half control tube moves to the right, separating the right half control tube from the left half control tube. The key and keyway connection method of the left half control tube and the right half control tube does not affect manual energy storage when rotating forward, while also meeting the requirements for separation when rotating in reverse, thus preparing for the torque amplifier to be connected to the drive shaft.

[0006] The preferred embodiment of the side-mounted miniature vacuum circuit breaker in this invention is as follows: the internal spline of the left half-tube is a first internal spline, the internal spline of the output shaft is a second internal spline, the internal spline of the input shaft is a third internal spline, and the internal spline of the right half-tube is a fourth internal spline; the left half-control tube is provided with a first external spline and a first external spline from left to right, and the right half-control tube is provided with a second external spline, a third external spline, and a fourth external spline from left to right; the left half-tube and the right half-tube are connected by a left-shifting drive shaft to engage the first external spline with the first internal spline and the fourth external spline with the fourth internal spline, and the right half-tube is connected by a right-shifting drive shaft to engage the first external spline with the first internal spline, the first external spline with the second internal spline, the second external spline with the third internal spline, and the third external spline with the fourth internal spline, and the left half-control tube and the right half-control tube are separated, and the torque amplifier is connected between the left half-tube and the right half-tube. In addition, to meet the positioning requirements, a first annular positioning groove and a second annular positioning groove are provided inside the left half-tube, and a first annular positioning ring is provided on the outer surface of the left half-control tube; a third annular positioning groove and a fourth annular positioning groove are provided inside the right half-tube, and a second annular positioning ring is provided on the outer surface of the right half-control tube. During the initial manual energy storage phase, conventional positioning is achieved by the first annular positioning ring engaging with the first annular positioning groove and the second annular positioning ring engaging with the third annular positioning groove, maintaining the engagement of the first external spline with the first internal spline and the fourth external spline with the fourth internal spline. The control shaft remains connected, connecting the left and right half-tubes, and the drive shaft directly drives the energy storage main shaft to store energy. In the later stage of manual energy storage, the first annular positioning ring is engaged with the second annular positioning groove, and the second annular positioning ring is engaged with the fourth annular positioning groove to form torque-increasing positioning. This maintains the engagement of the first external spline with the first internal spline, the first external spline with the second internal spline, the second external spline with the third internal spline, and the third external spline with the fourth internal spline. The left and right ends of the torque amplifier are connected between the left and right halves of the tube, respectively. A small torque can be used to stretch the energy storage spring to its maximum length, achieving a labor-saving effect.

[0007] The advantages of the side-mounted miniature vacuum circuit breaker in this invention are as follows: 1. Without increasing the original size of the side-mounted miniature vacuum circuit breaker, the structure of the drive shaft is improved and a torque amplifier is added to meet the conventional installation requirements. At the same time, the torque required for manual energy storage is reduced, making manual energy storage easier.

[0008] 2. Compared with the existing side-mounted vacuum circuit breaker, there is no difference in the early stage of manual energy storage. However, the difference is that in the later stage of manual energy storage, the torque amplifier is connected to the drive shaft through the control shaft. The torque of the right half tube is amplified by N times by the torque amplifier, which greatly reduces the torque required to press down the energy storage handle, thereby achieving the purpose of saving effort.

[0009] This invention also provides a manual energy storage method for a side-mounted miniature vacuum circuit breaker. Based on the aforementioned side-mounted miniature vacuum circuit breaker, the method includes the following steps: S1: The control shaft moves to the left until the first annular positioning ring engages with the first annular positioning groove, and simultaneously the second annular positioning ring engages with the third annular positioning groove, causing the first external spline to mesh with the first internal spline and the fourth external spline to mesh with the fourth internal spline. S2: The energy storage handle is reciprocated and pressed down, and the energy storage spring is slowly stretched until the torque required to press down the energy storage handle increases several times. S3: The control shaft moves to the right until the first annular positioning ring engages with the second annular positioning groove, causing the first external spline to mesh with the first internal spline, and simultaneously the first external spline to mesh with the second internal spline; the control shaft is rotated in the opposite direction, the L-shaped key of the right half of the control tube separates from the keyway, the right half of the control tube moves to the right until the second annular positioning ring engages with the fourth annular positioning groove, the L-shaped key exits from the keyway, and the right half of the control tube separates from the left half of the control tube. S4: Continue pressing down the energy storage handle repeatedly until the energy storage spring is stretched to its maximum length, the energy storage completion indicator switch responds, and manual energy storage ends.

[0010] The beneficial effects of the aforementioned manual energy storage method are as follows: In the early stages of manual energy storage, the torque amplifier does not intervene, maintaining the conventional reduction ratio between the energy storage handle and the energy storage spindle, quickly stretching the energy storage spring to a certain length. In the later stages of manual energy storage, the torque amplifier is connected to the drive shaft, increasing the reduction ratio between the energy storage handle and the energy storage spindle, thereby reducing the torque required to press down the energy storage handle, but increasing the number of times the energy storage handle needs to be pressed down. This method combines the high-efficiency energy storage method with the labor-saving energy storage method with the large reduction ratio, utilizing the advantages of both methods to balance energy storage efficiency and labor saving, thus solving the problem of excessive torque required at the end of existing manual energy storage methods. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the internal structure of the side-mounted miniature vacuum circuit breaker in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the internal structure of the side-mounted miniature vacuum circuit breaker in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the torque amplifier in this invention; Figure 4 for Figure 3 A schematic diagram showing the concealed outer cylinder; Figure 5 This is a schematic diagram of the drive shaft and control shaft in this embodiment; Figure 6 for Figure 5 Sectional view of AA; Figure 7 for Figure 6 A schematic diagram after the central control axis moves to the right and separates; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 This is a schematic diagram of the control shaft structure in this invention; Figure 10 for Figure 9 A schematic diagram after the control shaft is separated; Figure 11 This is a schematic diagram of the keyway and L-shaped key in this invention.

[0013] Reference numerals: 1. Vacuum interrupter; 2. Control box; 3. Insulating base; 4. Energy storage spindle; 5. Energy storage crank arm; 6. Energy storage spring; 7. Energy storage handle; 8. Drive shaft; 9. One-way bearing; 10. Left half tube; 11. Right half tube; 12. Rolling bearing; 13. Longitudinal partition; 14. Drive gear; 15. Torque amplifier; 16. Outer cylinder; 17. Planetary gear mechanism; 18. Input shaft; 19. Output shaft; 20. Intermediate shaft; 21. Control shaft; 22. Left half control tube; 23. Right half... 24. Control tube; 25. Keyway; 26. L-shaped key; 27. First internal spline; 28. Second internal spline; 29. ​​Third internal spline; 20. Fourth internal spline; 31. First external spline; 32. Second external spline; 33. Third external spline; 34. Fourth external spline; 35. First annular positioning groove; 36. Second annular positioning groove; 37. First annular positioning ring; 38. Third annular positioning groove; 39. Fourth annular positioning groove; 40. Second annular positioning ring; 41. Intermediate gear. Detailed Implementation

[0014] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0015] like Figure 1 and Figure 2As shown, this embodiment provides a side-mounted miniature vacuum circuit breaker, including a vacuum interrupter 1 and an operating box 2. The vacuum interrupter 1 is installed behind the operating box 2 via an insulating base 3, and the vacuum interrupter 1 is linked with the operating mechanism inside the operating box 2. The operating mechanism includes an energy storage spindle 4, an energy storage crank arm 5, an energy storage spring 6, and an energy storage handle 7. The energy storage spindle 4 is rotatably connected to the operating box 2. The energy storage crank arm 5 is installed at the left end of the energy storage spindle 4. The two ends of the energy storage spring 6 are respectively connected to the energy storage crank arm 5 and the operating box 2. The energy storage handle 7 drives the energy storage spindle 4 to rotate via a drive shaft 8, and a one-way bearing 9 is provided between the energy storage handle 7 and the drive shaft 8. The drive shaft 8 includes a left half-tube 10 and a right half-tube 11. The right half-tube 11 and the left half-tube 10 are rotatably connected to the longitudinal partition 13 in the operating box 2 via rolling bearings 12, and the right half-tube 11 is connected to the intermediate gear 41 of the energy storage spindle 4 via a drive gear 14. The right half-tube 11 is also connected to the energy storage handle 7 via the one-way bearing 9 to form a one-way transmission connection. The direction of the one-way bearing 9 is such that when the energy storage handle 7 swings downward, the one-way bearing 9 locks, thereby driving the right half-tube 11 to rotate synchronously. Conversely, when the energy storage handle 7 swings upward, the one-way bearing 9 can rotate, which will prevent the right half-tube 11 from rotating in the opposite direction, thus forming a one-way transmission relationship.

[0016] To reduce the torque required to press down the energy storage handle 7, this embodiment provides a coaxial torque amplifier 15 between the left half-tube 10 and the right half-tube 11. The left end and right end of the torque amplifier 15 are respectively provided with an output shaft 19 and an input shaft 18. The specific structure of the torque amplifier 15 is as follows: like Figure 3 and Figure 4 As shown, the torque amplifier 15 includes an outer cylinder 16 and two sets of planetary gear mechanisms 17 installed inside the outer cylinder 16. The sun gear of one set of planetary gear mechanisms 17 is coaxially fixed with the input shaft 18, and the planet carrier of the other set of planetary gear mechanisms 17 is coaxially fixed with the output shaft 19. The two sets of planetary gear mechanisms 17 are coaxially connected to the corresponding sun gear and planet carrier through an intermediate shaft 20. The gear rings of both sets of planetary gear mechanisms 17 are fixed to the outer cylinder 16, and the outer cylinder 16 is fixedly connected to the operating box 2. The outer cylinder 16 forms a counter-torque.

[0017] like Figure 5 , Figure 6 , Figure 7 and Figure 11As shown, in order to selectively connect the torque amplifier 15 to the left half-tube 10 and the right half-tube 11, this embodiment has axially extending inner holes in the left half-tube 10, the right half-tube 11, the output shaft 19, and the input shaft 18, and each inner hole has an internal spline. A control shaft 21 is located within the inner hole, with its right end extending from the right end of the right half-tube 11. The right half-tube 11 extends to the right and penetrates the side wall of the operating box 2, thus exposing the right end of the control shaft 21 to the operating box 2. The control shaft 21 includes a left half-control tube 22 and a right half-control tube 23, and the right end of the left half-control tube 22 and the left end of the right half-control tube 23 are detachably connected. The left half-control tube 22 and the right half-control tube 23 form a detachable connection structure as follows: the right end of the left half-control tube 22 is provided with a keyway 24, and the end of the keyway 24 extends circumferentially. The left end of the right half-control tube 23 is provided with an L-shaped key 25 that fits into the keyway 24. The L-shaped key 25 is inserted into the keyway 24, and the right half-control tube 23 rotates in the energy storage direction, thereby locking the L-shaped key 25 in the keyway 24. Rotation of the right half-control tube 23 in the energy storage direction is clockwise, and vice versa. After the L-shaped key 25 is inserted into the keyway 24, the right half-control tube 23 drives the left half-control tube 22 to rotate clockwise, and the L-shaped key 25 remains locked to the keyway 24, and the right half-control tube 23 does not separate from the left half-control tube 22. When the right half-control tube 23 rotates in reverse, the L-shaped key 25 exits the keyway 24, and then the right half-control tube 23 moves to the right, separating the right half-control tube 23 from the left half-control tube 22.

[0018] like Figure 6 , Figure 7 , Figure 9 and Figure 10As shown, the control shaft 21 has five external splines. The specific distribution of the internal and external splines is as follows: the internal spline of the left half-tube 10 is the first internal spline 26, the internal spline of the output shaft 19 is the second internal spline 27, the internal spline of the input shaft 18 is the third internal spline 28, and the internal spline of the right half-tube 11 is the fourth internal spline 29; the left half-control tube 22 has the first external spline 30 and the first external spline 31 from left to right, and the right half-control tube 23 has the second external spline 32, the third external spline 33, and the fourth external spline 34 from left to right; by shifting left... The drive shaft 8 engages the first external spline 31 with the first internal spline 26 and the fourth external spline 34 with the fourth internal spline 29, thereby connecting the left half-tube 10 and the right half-tube 11. By moving the drive shaft 8 to the right, the first external spline 30 engages the first internal spline 26, the first external spline 31 engages the second internal spline 27, the second external spline 32 engages the third internal spline 28, and the third external spline 33 engages the fourth internal spline 29, while the left half-control tube 22 and the right half-control tube 23 are separated, thereby connecting the torque amplifier 15 between the left half-tube 10 and the right half-tube 11. In addition, to meet the positioning requirements, a first annular positioning groove 35 and a second annular positioning groove 36 are provided inside the left half-tube 10, and a first annular positioning ring 37 is provided on the outer surface of the left half-control tube 22; a third annular positioning groove 38 and a fourth annular positioning groove 39 are provided inside the right half-tube 11, and a second annular positioning ring 40 is provided on the outer surface of the right half-control tube 23. In this embodiment, the left half-pipe 10 and the right half-pipe 11 are connected by axially moving the control shaft 21 and engaging the internal spline with different external splines, or the torque amplifier 15 is connected between the left half-pipe 10 and the right half-pipe 11. For example, in the early stage of manual energy storage, the torque required to press down the energy storage handle 7 is small, so the torque amplifier 15 does not need to be connected to the drive shaft 8 through the control shaft 21. The transmission connection relationship is as follows: the first annular positioning ring 37 is engaged with the first annular positioning groove 35 and the second annular positioning ring 40 is engaged with the third annular positioning groove 38 to form a normal positioning, maintaining the engagement of the first external spline 31 with the first internal spline 26 and the engagement of the fourth external spline 34 with the fourth internal spline 29. The control shaft 21 does not separate, connecting the left half-pipe 10 and the right half-pipe 11, and the drive shaft 8 directly drives the energy storage main shaft 4 to store energy. For example, in the later stage of manual energy storage, the torque amplifier 15 needs to be connected to the drive shaft 8 through the control shaft 21. The transmission relationship is as follows: the first annular positioning ring 37 is engaged with the second annular positioning groove 36 and the second annular positioning ring 40 is engaged with the fourth annular positioning groove 39 to form torque increase positioning, keeping the first external spline 30 engaged with the first internal spline 26 and the first external spline 31 engaged with the second internal spline 27, the second external spline 32 engaged with the third internal spline 28 and the third external spline 33 engaged with the fourth internal spline 29. The left and right ends of the torque amplifier 15 are respectively connected between the left half tube 10 and the right half tube 11, which can drive the energy storage spring 6 to stretch to its longest length with a small torque, achieving the effect of saving effort.

[0019] In this embodiment, the first annular positioning groove 35, the second annular positioning groove 36, the third annular positioning groove 38 and the fourth annular positioning groove 39 all need to be raised, but the height of the raised part cannot be higher than the external spline, that is, the external spline can pass through the annular positioning groove without obstruction, and the two do not affect each other during the movement of the control shaft 21.

[0020] This embodiment also provides a manual energy storage method for a side-mounted miniature vacuum circuit breaker. First, the control shaft 21 moves to the left until the first annular positioning ring 37 engages with the first annular positioning groove 35, and simultaneously the second annular positioning ring 40 engages with the third annular positioning groove 38, causing the first external spline 31 to mesh with the first internal spline 26 and the fourth external spline 34 to mesh with the fourth internal spline 29. That is, the left half-tube 10 and the right half-tube 11 are connected through the control shaft 21. The energy storage handle 7 drives the right half-tube 11 to rotate, and the right half-tube 11 drives the control shaft 21 to rotate. After passing through the torque amplifier 15, the control shaft 21 drives the left half-tube 10 to rotate. The control shaft 21 does not contact the torque amplifier 15. In this case, the reduction ratio between the energy storage handle 7 and the energy storage main shaft 4 is a conventional reduction ratio. By repeatedly pressing down the energy storage handle 7, the energy storage spring 6 is slowly stretched until the torque required to press down the energy storage handle 7 increases to several times.

[0021] Then, the control shaft 21 moves to the right until the first annular positioning ring 37 engages with the second annular positioning groove 36, causing the first external spline 30 to mesh with the first internal spline 26, and simultaneously the first external spline 31 to mesh with the second internal spline 27. The left half of the control tube 22 connects the left half of the tube 10 to the output shaft 19 of the torque amplifier 15 via internal and external splines. Then, the control shaft 21 is rotated in the opposite direction, the L-shaped key 25 of the right half of the control tube 23 separates from the keyway 24, and the right half of the control tube 23 moves to the right until the second annular positioning ring 40 engages with the fourth annular positioning groove 39, the L-shaped key 25 exits from the keyway 24, and the right half of the control tube 23 separates from the left half of the control tube 22. The right half of the control tube 23 connects the right half of the tube 11 to the input shaft 18 of the torque amplifier 15 via internal and external splines. In this situation, the reduction ratio between the energy storage handle 7 and the energy storage spindle 4 is increased, and the energy storage handle 7 is pressed down repeatedly until the energy storage spring 6 is stretched to its maximum length. The energy storage completion indicator switch responds, and manual energy storage ends.

[0022] This embodiment combines a high-efficiency energy storage method with a low-reduction-ratio, labor-saving energy storage method. It leverages the advantages of both methods, balancing energy storage efficiency and labor saving, thereby solving the problem of excessive torque required at the end of existing manual energy storage systems. Specifically, in the early stages of manual energy storage, the torque amplifier 15 is not engaged, maintaining the normal reduction ratio between the energy storage handle 7 and the energy storage spindle 4, quickly stretching the energy storage spring 6 to a certain length. In the later stages of manual energy storage, the torque amplifier 15 is connected to the drive shaft 8, increasing the reduction ratio between the energy storage handle 7 and the energy storage spindle 4, thereby reducing the torque required to press down the energy storage handle 7, but increasing the number of times the energy storage handle 7 needs to be pressed down.

[0023] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A side-mounted miniature vacuum circuit breaker, comprising a vacuum interrupter and an operating box, wherein the vacuum interrupter is mounted on the rear of the operating box via an insulating base, and the vacuum interrupter is linked with an operating mechanism inside the operating box; the operating mechanism comprises an energy storage spindle, an energy storage crank arm, an energy storage spring, and an energy storage handle, wherein the energy storage spindle is rotatably connected to the operating box, the energy storage crank arm is mounted on the left end of the energy storage spindle, the two ends of the energy storage spring are respectively connected to the energy storage crank arm and the operating box, and the energy storage handle drives the energy storage spindle to rotate via a drive shaft, wherein a one-way bearing is provided between the energy storage handle and the drive shaft; Its features are: The drive shaft includes a left half tube and a right half tube, and a coaxial torque amplifier is provided between the left half tube and the right half tube. The left end and the right end of the torque amplifier are respectively provided with an output shaft and an input shaft. The left half tube, the right half tube, the output shaft and the input shaft are respectively provided with axially extending inner holes, and each inner hole is provided with an internal spline. The right half-pipe extends to the right and penetrates the side wall of the control box; Includes a control shaft located in the inner hole, the control shaft having multiple external splines, the right end of the control shaft extending from the right end of the right half tube, by axially moving the control shaft and engaging the internal splines with different external splines, thereby connecting the left half tube and the right half tube or connecting a torque amplifier between the left half tube and the right half tube.

2. The side-mounted miniature vacuum circuit breaker according to claim 1, characterized in that: The control axis includes a left half control tube and a right half control tube, and the right end of the left half control tube and the left end of the right half control tube can be detachably connected.

3. A side-mounted miniature vacuum circuit breaker according to claim 2, characterized in that: The right end of the left half control tube is provided with a keyway and the end of the keyway extends circumferentially. The left end of the right half control tube is provided with an L-shaped key that matches the keyway. The L-shaped key is inserted into the keyway and the right half control tube is rotated in the energy storage direction, thereby locking the L-shaped key in the keyway.

4. A side-mounted miniature vacuum circuit breaker according to claim 3, characterized in that: The left half-tube has a first internal spline, the output shaft has a second internal spline, the input shaft has a third internal spline, and the right half-tube has a fourth internal spline. The left half-control tube has a first external spline and a first external spline from left to right, and the right half-control tube has a second external spline, a third external spline, and a fourth external spline from left to right. By shifting the drive shaft to the left, the first external spline engages with the first internal spline and the fourth external spline engages with the fourth internal spline, thereby connecting the left and right half-tubes. By shifting the drive shaft to the right, the first external spline engages with the first internal spline, the first external spline engages with the second internal spline, the second external spline engages with the third internal spline, and the third external spline engages with the fourth internal spline, while the left and right half-control tubes are separated, thereby connecting the torque amplifier between the left and right half-tubes.

5. A side-mounted miniature vacuum circuit breaker according to claim 4, characterized in that: The left half-tube has a first annular positioning groove and a second annular positioning groove inside, and a first annular positioning ring on the outer surface of the left half-control tube; the right half-tube has a third annular positioning groove and a fourth annular positioning groove inside, and a second annular positioning ring on the outer surface of the right half-control tube.

6. A side-mounted miniature vacuum circuit breaker according to claim 5, characterized in that: The torque amplifier includes an outer cylinder and two sets of planetary gear mechanisms installed inside the outer cylinder. The sun gear of one set of planetary gear mechanisms is coaxially fixed with the input shaft, and the planet carrier of the other set of planetary gear mechanisms is coaxially fixed with the output shaft. The two sets of planetary gear mechanisms are coaxially connected to the corresponding sun gear and planet carrier through an intermediate shaft. The gear rings of both sets of planetary gear mechanisms are fixed to the outer cylinder, and the outer cylinder is fixedly connected to the operating box.

7. A side-mounted miniature vacuum circuit breaker according to claim 6, characterized in that: The right and left halves are rotatably connected to the longitudinal partition in the control box via rolling bearings, and the right half is connected to the intermediate gear of the energy storage main shaft via a drive gear, and the right half is connected to the energy storage handle via a one-way bearing.

8. A manual energy storage method for a side-mounted miniature vacuum circuit breaker, characterized in that: Based on the side-mounted miniature vacuum circuit breaker according to claim 7, the steps are as follows: S1. The control shaft moves to the left until the first annular positioning ring is engaged in the first annular positioning groove and the second annular positioning ring is engaged in the third annular positioning groove, so that the first external spline meshes with the first internal spline and the fourth external spline meshes with the fourth internal spline. S2. Press down the energy storage handle repeatedly, and the energy storage spring is slowly stretched until the torque required to press down the energy storage handle increases several times. S3. Move the control shaft to the right until the first annular positioning ring is engaged with the second annular positioning groove, so that the first external spline engages with the first internal spline and the first external spline engages with the second internal spline; rotate the control shaft in the opposite direction, the L-shaped key of the right half of the control tube separates from the keyway, move the right half of the control tube to the right until the second annular positioning ring is engaged with the fourth annular positioning groove, the L-shaped key exits from the keyway, the right half of the control tube separates from the left half of the control tube, the second external spline engages with the third internal spline and the third external spline engages with the fourth internal spline. 9.S4 Continue to press down the energy storage handle repeatedly until the energy storage spring is stretched to its maximum length, the energy storage completion indicator switch responds, and manual energy storage ends.

Images