Three-position mechanism with quick opening function

Abstract

The application discloses a three-position mechanism with a quick opening function, comprising a rack, a closing device, an opening device, a grounding device, an opening tripping device, an energy storage device, a motor driving module and a main shaft device arranged on the rack, the motor driving module is detachably arranged on the rack, a transmission mechanism is arranged between the closing device and the energy storage device, the transmission mechanism comprises a double cam, the energy storage device releases energy to drive the closing device to close through the double cam, the opening device is linked with the opening tripping device, the opening tripping device is linked with the closing device, the closing device and the grounding device are respectively linked with the main shaft device, and the main shaft device outputs closing and opening torque and grounding torque to a load switch, the traditional component design mode is changed, the three-position mechanism is light and beautiful under the condition of meeting the functional requirements, the closing power output efficiency is improved, and the artificial operation force is reduced.

Description

Technical Field

[0001] This invention belongs to the field of load switches and relates to a three-position mechanism with a fast tripping function. Background Technology

[0002] The three-position mechanism is used to drive the load switch. With increasing safety requirements, the load switch needs to be able to quickly trip and disconnect the faulty circuit when a line fault occurs. However, the existing three-position mechanism has the following problems: First, the structure is complex, the manufacturing process of the parts is demanding, it is not convenient to install, and the modular design is poor. Second, the secondary closing function requires additional parts to complete, which is complex and has low reliability. Third, the closing is driven by a traditional cam, which has low transmission efficiency, resulting in greater torque required for energy storage during the closing process and making operation difficult. Fourth, in the electric operation mode, the motor is installed between the mechanism plates, which cannot be quickly disassembled and assembled, which brings difficulties to manual and electric switching and motor maintenance. Fifth, the number of microswitches that can be installed in the mechanism is limited, which reduces the types of signals that can be transmitted when the mechanism is switching, and cannot meet the needs of the existing complex secondary circuit schemes. Sixth, the status indication structure is complex and cannot accurately indicate the position of the load switch, which has a certain degree of uncertainty. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a three-position mechanism with a fast tripping function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a three-position mechanism with a fast tripping function, comprising a frame, on which are mounted a closing device, a tripping device, a grounding device, a tripping release device, an energy storage device, a motor drive module, and a main shaft device. The motor drive module is detachably mounted on the frame. A transmission mechanism is provided between the closing device and the energy storage device. The transmission mechanism includes a double cam. The energy storage device releases energy and drives the closing device to close via the double cam. The tripping device is linked with the tripping release device, and the tripping release device is linked with the closing device. The closing device and the grounding device are respectively linked with the main shaft device. The main shaft device outputs closing / tripping torque and grounding torque to the load switch.

[0005] Furthermore, the frame includes a rear mechanism plate, a front mechanism plate, and an intermediate plate. The rear mechanism plate and the front mechanism plate are fixedly connected by a support assembly. The intermediate plate is fixed between the rear mechanism plate and the front mechanism plate. The rear mechanism plate, the intermediate plate, and the front mechanism plate are provided with several pressure ribs. The rear mechanism plate is fixed with a switching arc groove and a grounding arc groove. The ends of the arc grooves at both ends of the switching arc groove and the grounding arc groove are provided with switching reinforcing ribs.

[0006] Furthermore, the tripping device includes a tripping crank arm, a grounding spring crank arm, and a tripping spring. The tripping crank arm is mounted on the closing operating shaft and is fixedly connected to the tripping and closing crank arm. The tripping crank arm and the tripping and closing crank arm rotate synchronously. The free end of the tripping crank arm is provided with a tripping and closing transmission pin. The grounding spring crank arm is mounted on the grounding operating shaft and is provided with a grounding transmission pin at its free end. The closing device includes a closing operating shaft and a tripping and closing drive mechanism. The tripping and closing drive mechanism includes a tripping and closing crank arm, which is mounted on the closing operating shaft and is fixedly connected to the tripping crank arm. The tripping and closing crank arm is fixedly provided with a tripping and closing transmission rod. The grounding device includes a grounding operating shaft and a grounding transmission mechanism. The grounding operating shaft is rotatably connected to the rear mechanism plate and the front mechanism plate. The grounding transmission mechanism includes a grounding crank arm, which is rotatably connected to the grounding operating shaft.

[0007] Furthermore, the energy storage device includes an energy storage shaft, an energy storage crank arm, and an energy storage compression spring assembly. The energy storage shaft is rotatably connected to the front mechanism plate and the middle plate of the frame. The energy storage crank arm is fixedly mounted on the energy storage shaft. The energy storage compression spring assembly includes an upper energy storage plate, an energy storage spring, and a lower energy storage plate. The upper and lower ends of the energy storage spring are fixedly connected to the upper energy storage plate and the lower energy storage plate, respectively. The upper energy storage plate is connected to the free end of the energy storage crank arm, and the lower energy storage plate is connected to the rear mechanism plate of the frame.

[0008] Furthermore, the transmission mechanism also includes a closing crank arm, with a double cam fixed to the energy storage shaft. The double cam includes a first protrusion and a second protrusion. The closing crank arm is located on the closing operation shaft of the closing device. The closing crank arm and the tripping crank arm are fixedly connected by a pin assembly. The closing crank arm, the tripping crank arm, and the opening and closing crank arm rotate synchronously. The pin assembly includes a first pin and a second pin. The second protrusion, the first protrusion, the first pin, and the second pin are distributed in sequence along the horizontal direction, and the second protrusion, the first protrusion, the first pin, and the second pin are in the same vertical plane.

[0009] Furthermore, the sum of the distance between the top of the second protrusion and the axis of the energy storage shaft and the distance between the top of the first pin and the axis of the closing operation shaft is greater than the distance between the axis of the energy storage shaft and the axis of the closing operation shaft, and the sum of the distance between the top of the first protrusion and the axis of the energy storage shaft and the distance between the top of the second pin and the axis of the closing operation shaft is greater than the distance between the axis of the energy storage shaft and the axis of the closing operation shaft.

[0010] Furthermore, it also includes a device to prevent secondary closing, which includes an energy storage upper plate and a tripping crank arm. The energy storage upper plate is connected to the free end of the energy storage crank arm and the energy storage spring, respectively. When the circuit is closed, the energy storage spring is reset from the stretched state to release energy, and the energy storage upper plate abuts against the tripping crank arm.

[0011] Furthermore, the grounding device also includes a grounding limiting mechanism, which includes a third support and a fourth support. The third support and the fourth support are located on both sides of the grounding transmission mechanism. When the load switch is in the grounding operation state, the grounding spring crank arm abuts against the fourth support. When the load switch is in the grounding reset state, the grounding spring crank arm abuts against the third support.

[0012] Furthermore, the motor drive module is configured as a modular structure, comprising an electric body, a motor, and an electric connecting shaft. The motor and the electric connecting shaft are mounted on the electric body, the motor controls the operation of the electric connecting shaft, and the electric connecting shaft is provided with gear teeth.

[0013] Furthermore, the electric main body is mounted on the front of the front mechanism plate of the frame, with the motor and electric connecting shaft located on the same side and facing the middle plate of the frame.

[0014] In summary, the advantages of this invention are:

[0015] 1) This invention changes the traditional component design (heavy, with many processing steps, etc.) to make it lighter and more aesthetically pleasing while meeting functional requirements, improves the closing power output efficiency, reduces manual operation force, and makes key components one-time processing to reduce processing costs, reduce labor costs, improve manufacturing efficiency, and make it durable. It can also be freely switched between manual and electric modes in complex environments without affecting the overall mechanism, improves safety performance requirements, and allows the load switch to quickly trip and disconnect the faulty circuit when a line fault occurs.

[0016] 2) The frame of this invention is formed by mold pressing and the mounting holes of rotating parts such as the operating shaft are flanged to enhance their strength and meet the functional requirements.

[0017] 3) This invention uses gear teeth on the electric connecting shaft to drive the energy storage spring to store energy, and mounts the motor on the front of the front mechanism plate of the frame so that it can be quickly disassembled without redesigning the manual and electric mechanisms, thus increasing the versatility of parts.

[0018] 4) The present invention installs a double cam on the energy storage shaft. During the closing process, the first and second protrusions of the double cams contact the first and second pins respectively to push the closing and realize the transmissibility of the transmission. During the transmission of spring force, the lever arm can be indirectly increased, reducing the output of the energy storage spring work and increasing the comfort of operation. At the same time, it reduces the impact between the components of the mechanism, improves the service life, and greatly increases the transmission efficiency compared with the traditional cam under the same conditions. This embodiment reduces the spring force without affecting the opening and closing speed.

[0019] 5) The energy storage upper plate and the tripping crank arm of the present invention are both structures of the energy storage device and the tripping device itself. The secondary closing device does not need to be designed separately to prevent it. It only relies on the structure and movement position of the energy storage device and the tripping device itself to restrict each other, so that only one of the tripping crank arm and the energy storage spring can be allowed to pass within a specific range. Relying on this mutually restrictive mechanism design, the structure is simpler, more stable, and easier to manufacture.

[0020] 6) The splitting and engaging crank arm, the tripping crank arm, the upper pressure spring head, the lower pressure spring head, and the grounding crank arm of the present invention can be configured as an integral molding structure. The upper pressure spring head, the lower pressure spring head, the splitting and engaging crank arm, and the tripping crank arm are injection molded parts, which can be used without secondary processing. Compared with the traditional cast steel structure, this application does not require special treatment to enhance its rust prevention, corrosion resistance, and other requirements.

[0021] 7) The split-joint crank arm, trip crank arm, and grounding crank arm of the present invention can all be designed as separate structures, and each separate part is connected by riveting. This can turn the parts that need to be processed as a whole into parts that can be processed separately without affecting each other's processing progress. Different processes can be applied to parts in different locations. While meeting our usage requirements, the mutual influence is minimized, indirectly reducing processing steps, reducing processing difficulty, and reducing processing costs.

[0022] 8) The indicator spindle of the present invention is connected to the spindle of the load switch, and the indicator plate is connected to the indicator spindle, thereby improving the accuracy of the load switch position status indication.

[0023] 9) The micro switch device of the present invention includes a micro switch and a micro cam. The micro switch is fixed on the frame, and the micro cam is fixed on the indicator spindle or the load switch spindle. The state of the load switch is directly transmitted through the indicator spindle. Compared with the existing micro switch indirectly driven by the linkage mechanism, the structure of the present application is simpler, the motion transmission is more direct and efficient, and the accuracy and stability of the micro switch signal switching are effectively improved. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the three-station mechanism of the present invention. Figure 1 .

[0025] Figure 2 This is a schematic diagram of the three-station mechanism of the present invention. Figure 2 .

[0026] Figure 3 This is a schematic diagram of the frame of the present invention.

[0027] Figure 4 This is an assembly diagram of the closing device, opening device, grounding device, opening tripping device, and energy storage device of the present invention.

[0028] Figure 5 This is a schematic diagram of the closing device and the opening tripping device of the present invention. Figure 1 .

[0029] Figure 6 This is a schematic diagram of the closing device and the opening tripping device of the present invention. Figure 2 .

[0030] Figure 7 This is a schematic diagram of the assembly of the tripping device, energy storage device, and anti-secondary-closing device of the present invention. Figure 1 .

[0031] Figure 8 This is a schematic diagram of the assembly of the tripping device, energy storage device, and anti-secondary-closing device of the present invention. Figure 2 .

[0032] Figure 9 This is a schematic diagram of the dual-cam invention.

[0033] Figure 10 This is a schematic diagram of the grounding spring crank arm of the present invention.

[0034] Figure 11 This is a schematic diagram of the split-joint crank arm of the present invention.

[0035] Figure 12 This is a schematic diagram of the motor drive module of the present invention.

[0036] Figure 13 This is a schematic diagram of the transmission mechanism of the present invention.

[0037] Figure 14 This is a schematic diagram of the assembly of the indicating device, micro switch device, and spindle device of the present invention. Figure 1 .

[0038] Figure 15 This is a schematic diagram of the grounding crank arm in Embodiment 2 of the present invention. Figure 1 .

[0039] Figure 16 This is a schematic diagram of the grounding crank arm in Embodiment 2 of the present invention. Figure 2 .

[0040] Figure 17 This is a schematic diagram of the assembly of the tripping crank arm and the grounding crank arm in Embodiment 3 of the present invention. Figure 1 .

[0041] Figure 18 This is a schematic diagram of the assembly of the tripping crank arm and the grounding crank arm in Embodiment 3 of the present invention. Figure 2

[0042] The diagram shows the following components: Frame 1, Rear Mechanism Plate 11, Third Support 133, Motor 271, Motor Output Shaft 272, Electric Connection Shaft 273, Gear Gear 275, Fourth Support 134, Front Mechanism Plate 12, Intermediate Plate 10, Pressure Rib 111, Opening / Closing Arc Groove 112, First Opening / Closing Through Hole 114, Grounding Arc Groove 116, First Grounding Through Hole 117, Opening / Closing Crank Arm 22, Opening / Closing Transmission Rod 223, Opening / Closing Transmission Pin 28, Tripping Crank Arm 29, First Opening / Closing Plate 291 and Second Opening / Closing Plate 292, First Free End 293, Second Free End 294, Grounding Operating Shaft 31, Grounding Crank Arm 32, First Grounding Crank Arm Plate 321, Grounding Slide Groove 3211, Second Grounding Crank Arm Plate 322, Grounding Transmission Rod 323, Tripping Spring. 37. Grounding transmission pin; 38. Grounding spring crank arm; 39. Base plate; 391. Side plate; 392. Second mounting hole; 393. First mounting hole; 394. Cam plate; 41. Opening and closing limiting arc groove; 411. Grounding limiting arc groove; 412. Indicator spindle; 42. Indicator sign; 43. Micro switch; 44. Micro cam; 45. Energy storage shaft; 50. Energy storage crank arm; 51. Energy storage upper plate; 521. Energy storage spring; 522. Energy storage lower plate; 523. Double cam; 53. First protrusion; 531. Second protrusion; 532. Closing crank arm; 54. Riveting column; 540. First pin; 541. Second pin; 542. First transmission gear; 57. Transmission shaft; 571. Second transmission gear; 58. Third transmission gear; 59. Tripping half shaft; 60. Buckle plate; 61. Tripping pin; 62. Detailed Implementation

[0043] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0045] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, lateral, longitudinal, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0046] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0047] Example 1:

[0048] like Figure 1-14 As shown, a three-position mechanism with a fast tripping function includes a frame 1. The frame 1 is equipped with a closing device, a tripping device, a grounding device, a tripping release device, an energy storage device, a motor drive module, and a main shaft device. The motor drive module is detachably mounted on the frame 1. A transmission mechanism is provided between the closing device and the energy storage device. The transmission mechanism includes a double cam 53. The energy storage device releases energy and drives the closing device to close through the double cam 53. The tripping device is linked with the tripping release device 7. The tripping release device 7 is linked with the closing device 2. The closing device 2 and the grounding device are linked with the main shaft device respectively. The main shaft device outputs the closing / tripping torque and the grounding torque to the load switch.

[0049] The frame 1 includes a rear mechanism plate 11, a front mechanism plate 12, and an intermediate plate 10. The rear mechanism plate 11 and the front mechanism plate 12 are fixedly connected by a support assembly. The support assembly is located between the rear mechanism plate 11 and the front mechanism plate 12, and its two ends are fixedly connected to the rear mechanism plate 11 and the front mechanism plate 12 respectively. The intermediate plate 10 is fixed between the rear mechanism plate 11 and the front mechanism plate 12. A first mounting cavity is formed between the rear mechanism plate 11 and the front mechanism plate 12. The closing device, the opening device, the grounding device, and the opening tripping device are located in the first mounting cavity. A second mounting cavity is formed between the front mechanism plate 12 and the intermediate plate 10. The transmission mechanism is located in the second mounting cavity. A third mounting cavity is formed between the rear mechanism plate 11 and the intermediate plate 10. The energy storage device is located in the third mounting cavity.

[0050] In this embodiment, the rear mechanism plate 11, the front mechanism plate 12, and the middle plate 10 are arranged in parallel.

[0051] The rear mechanism plate 11 and the front mechanism plate 12 are thin plate structures. The rear mechanism plate 11, the middle plate 10 and the front mechanism plate 12 are provided with a number of ribs 111. The ribs of the rear mechanism plate 11 and the front mechanism plate 12 are formed by rib forming to improve the strength of the thin plate, reduce the amount of material used while keeping the strength unchanged.

[0052] The rear mechanism plate 11 is fixedly provided with a closing / opening arc groove 112, a first closing / opening through hole 114, a grounding arc groove 116, and a first grounding through hole 117. The front mechanism plate 12 is fixedly provided with a second closing / opening through hole (not shown in the figure) and a second grounding through hole (not shown in the figure). The central axis of the first closing / opening through hole 114 and the central axis of the second closing / opening through hole are collinear. The central axis of the first grounding through hole 117 and the central axis of the second grounding through hole are collinear. The ends of the arc grooves at both ends of the closing / opening arc groove 112 and the grounding arc groove 116 are provided with closing / opening reinforcing ribs 113 to strengthen the strength of the closing / opening arc groove 112 and reduce the impact force on the closing device and the ends of the closing / opening arc groove 112. At the same time, the mounting holes of rotating parts such as the operating shaft are flanged to enhance their strength and meet the functional requirements.

[0053] The support assembly includes several supports, which are distributed between the rear mechanism plate 11 and the front mechanism plate 12 to ensure the stability of the frame 1.

[0054] The tripping device includes a tripping crank arm 29, a grounding spring crank arm 39, and a tripping spring 37. The tripping crank arm 29 is fixed to the closing operating shaft 21 and can rotate with the closing operating shaft 21. The tripping crank arm 29 is fixedly connected to the opening and closing crank arm 22 and rotates synchronously with the opening and closing crank arm 22. The free end of the tripping crank arm 29 is provided with an opening and closing transmission pin 28. The grounding spring crank arm 39 is fixed to the grounding operating shaft 31 and can rotate with the grounding operating shaft 31. The free end of the grounding spring crank arm 39 is provided with a grounding transmission pin 38. The tripping spring 37 adopts an existing structure. The upper and lower spring heads of the tripping spring 37 cooperate with the opening and closing transmission pin 28 and the grounding transmission pin 38, respectively, so that the tripping spring 37 can store and release energy during the rotation of the tripping crank arm 29 or the grounding spring crank arm 39.

[0055] In this embodiment, the tripping crank arm 29 includes a first split plate 291 and a second split plate 292. The first split plate 291 and the second split plate 292 are respectively fixed on the closing operation shaft 21. The splitting and closing transmission pin 28 is located between the first split plate 291 and the second split plate 292, and both ends of the transmission pin 28 are fixedly connected to the first split plate 291 and the second split plate 292. In this embodiment, the tripping crank arm 29 is a welded part.

[0056] In this embodiment, the grounding spring crank arm 39 is an integrally formed structure, including a base plate 391 and two side plates 392. The two side plates 392 are symmetrically fixed on both sides of the base plate 391 to form a U-shaped structure. The side plates 392 are fixed with a first mounting hole 394 and a second mounting hole 393. The first mounting hole 394 is used for mounting the grounding operation shaft 31 of the grounding device, and the second mounting hole 393 is used for mounting the grounding transmission pin 38.

[0057] The energy storage device includes an energy storage shaft 50, an energy storage crank arm 51, and an energy storage spring assembly. The energy storage shaft 50 is rotatably connected to the front mechanism plate 12 and the intermediate plate 10. The energy storage crank arm 51 is fixedly mounted on the energy storage shaft 50 located outside the intermediate plate 10. The energy storage spring assembly includes an upper energy storage plate 521, an energy storage spring 522, and a lower energy storage plate 523. The upper and lower ends of the energy storage spring 522 are fixedly connected to the upper energy storage plate 521 and the lower energy storage plate 523, respectively. The upper energy storage plate 521 is connected to the free end of the energy storage crank arm 51, and the lower energy storage plate 523 is connected to the rear mechanism plate 11 of the frame 1. With the lower energy storage plate 523 as a fixed point, the energy storage crank arm 51 drives the energy storage spring 522 to stretch and store energy through the upper energy storage plate 521. After the energy storage crank arm 51 passes the dead point, the energy storage spring 522 contracts and releases energy, driving the energy storage crank arm 51 to continue rotating and driving the closing device through the transmission mechanism.

[0058] The transmission mechanism includes a double cam 53 and a closing crank arm 54. The double cam 53 is fixed to the energy storage shaft 50 and rotates with the energy storage shaft 50. The double cam 53 includes a first protrusion 531 and a second protrusion 532. The closing crank arm 54 is disposed on the closing operation shaft 21. The closing crank arm 54 and the first opening / closing plate 291 of the tripping crank arm 29 are fixedly connected by a pin assembly. The closing crank arm 54, the tripping crank arm 29, and the opening / closing crank arm 22 rotate synchronously. The pin assembly includes a first pin 541 and a second pin 542. Figure 7 From a visual perspective, the second protrusion 532, the first protrusion 531, the first pin 541, and the second pin 542 are distributed horizontally in sequence, and the second protrusion 532, the first protrusion 531, the first pin 541, and the second pin 542 are on the same vertical plane. The sum of the distance between the top of the second protrusion 532 and the axis of the energy storage shaft 50 and the distance between the top of the first pin 541 and the axis of the closing operation shaft 21 is greater than the distance between the axis of the energy storage shaft 50 and the axis of the closing operation shaft 21. The sum of the distance between the top of the first protrusion 531 and the axis of the energy storage shaft 50 and the distance between the top of the second pin 542 and the axis of the closing operation shaft 21 is greater than the distance between the axis of the energy storage shaft 50 and the axis of the closing operation shaft 21.

[0059] When the load switch is in the open position, the double cam 53... Figure 7 As shown in the diagram, the opening / closing transmission rod 223 is located at the bottom end of the opening / closing arc groove 112, and the first pin 541 and the second pin 542 are located as shown in the diagram. Figure 7 As shown below, the energy storage shaft 50 is electrically or manually driven. Figure 7 As shown by arrow A, when the first protrusion 531 and the second protrusion 532 pass their lowest points, the energy storage crank arm 51 passes its dead point, removing the external force. The energy storage spring 522 contracts and releases energy, and the energy storage crank arm 51 continues to rotate in the direction of arrow A. During this process, the second protrusion 532 strikes the second pin 542, and the closing crank arm 54 drives the tripping crank arm 29 to rotate synchronously, thereby causing the opening and closing crank arm 22 to rotate synchronously. The direction of rotation is as follows: Figure 7 As shown by arrow B, after passing the far point, the second protrusion 532 disengages from the state of abutting against the second pin 542, and the first protrusion 531 strikes the first pin 541. The opening and closing crank arm 22 continues to rotate until the tripping crank arm 29 reaches the set position and abuts against the tripping holding device to maintain the prohibited state, thereby completing the closing action. At this time, the tripping spring 37 is in a compressed energy storage state. In this embodiment, during the closing process, the first protrusion 531 and the second protrusion 532 of the double cam contact the first pin 541 and the second pin 542 respectively to push the closing and realize the transmissibility of the transmission. In the process of transmitting the spring force, the lever arm can be indirectly increased, reducing the output of the energy storage spring 52 and increasing the comfort of operation; at the same time, it reduces the impact between the components of the mechanism, improves the service life, and greatly increases the transmission efficiency compared with the traditional cam under the same conditions. This embodiment reduces the spring force without affecting the opening and closing speed.

[0060] The tripping and holding device adopts an existing structure, including a tripping half-shaft 60 and a locking plate 61. The tripping half-shaft 60 is rotatably connected to the front mechanism plate 12 and the rear mechanism plate 11. A half-shaft torsion spring is sleeved on the tripping half-shaft 60 for resetting the tripping half-shaft 60. A semi-circular notch is fixed on the tripping half-shaft 60, including a cut surface and a semi-circular back surface. When the locking plate 61 is opposite to the cut surface, the tripping half-shaft 60 and the locking plate 61 are no longer interfering. When the locking plate 61 is in contact with the semi-circular back surface, the tripping half-shaft 60 and the locking plate 61 are in an interfering state. A locking plate mounting shaft is rotatably arranged between the front mechanism plate 12 and the rear mechanism plate 11. The locking plate 61 is fixed on the locking plate mounting shaft and is equipped with a locking plate torsion spring for resetting the locking plate 61. A tripping half-shaft torsion spring is fixed on the locking plate 61. The second splitting plate 292 includes a first free end 293 and a second free end 294. When the circuit is closed, the second free end 294 is located below the tripping pin 62 and abuts against the tripping pin 62. The first free end 293 abuts against the energy storage upper plate 521, restricting the movement of the energy storage upper plate 521, thereby stopping the double cam and waiting for the command to close after the next tripping. In this embodiment, the first free end 293 and the second free end 294 are the top ends of the second splitting plate 292, and both the first free end 293 and the second free end 294 are set as arc surfaces. When the circuit is tripped, the tripping crank arm 29 only needs to be pushed away from the first free end 293 and the second free end 294 by the tripping spring 37 to complete the tripping. It will not affect the failure to close due to excessive interference.

[0061] To prevent secondary closing, this embodiment employs a secondary closing prevention device to address the secondary closing problem. The secondary closing prevention device includes an energy storage upper plate 521 and a tripping crank arm 29. The energy storage upper plate 521 is connected to the free end of the energy storage crank arm 51 and the energy storage spring 522, respectively. When the circuit is closed, the energy storage spring 522 is reset from the stretched state and releases energy, and the energy storage upper plate 521 abuts against the tripping crank arm 29.

[0062] In this embodiment, the structures of the release crank arm 29, the energy storage upper plate 521, and the energy storage device are the same as those described above, and will not be repeated here.

[0063] During the implementation of the device to prevent secondary closing, after the energy storage spring 52 passes through the dead point through the energy storage action, the tension generated by the retraction of the energy storage spring 52 drives the double cam 53 through the energy storage shaft 50 to push the tripping crank arm 29 to the closed state. At this time, the spring force of the energy storage spring 52 is fully released and it is contracted to the shortest state. At this time, the energy storage upper plate 521 abuts against the first free end 293 of the second opening and closing plate 292, thereby preventing the energy storage spring 52 from moving further, thus realizing the function of preventing secondary closing.

[0064] In this embodiment, the energy storage upper plate 521 and the tripping crank arm 29 are both structures of the energy storage device and the tripping device itself. The secondary closing device does not need to be designed separately. It only relies on the structure and movement position of the energy storage device and the tripping device itself to restrict each other, so that only one of the tripping crank arm 29 and the energy storage spring 52 can be allowed to pass within a specific range. Relying on this mutually restrictive mechanism design, the structure is simpler, more stable, and easier to manufacture.

[0065] The closing device includes a closing operation shaft 21 and a closing / opening drive mechanism. The closing operation shaft 21 passes through the first closing / opening through hole 114 of the rear mechanism plate 11 and the second closing / opening through hole of the front mechanism plate 12, and is rotatably connected to the first closing / opening through hole 114 and the second closing / opening through hole.

[0066] The opening and closing drive mechanism includes an opening and closing crank arm 22, which is mounted on the closing operation shaft 21. The opening and closing crank arm 22 is fixedly connected to the second opening and closing plate 292 of the tripping crank arm 29. The opening and closing crank arm 22 is fixedly provided with an opening and closing transmission rod 223, which is inserted into the opening and closing arc groove 112 and slides along the opening and closing arc groove 112.

[0067] The grounding device includes a grounding operating shaft 31 and a grounding transmission mechanism. The grounding operating shaft 31 passes through the first grounding through hole 117 of the rear mechanism plate 11 and the second grounding through hole of the front mechanism plate 12, and is rotatably connected to the first grounding through hole 117 and the second grounding through hole.

[0068] The grounding transmission mechanism includes a grounding crank arm 32, which is rotatably connected to the grounding operation shaft 31. The grounding crank arm 32 is an integral structure, and includes a third end face and a fourth end face that are opposite to each other. The third end face is fixed with a grounding groove 3211, and the fourth end face is fixed with a grounding transmission rod 323.

[0069] In this embodiment, the grounding crank arm 32 is made of injection molding and can be used without secondary processing. Compared with the traditional cast steel grounding crank arm 32, the grounding crank arm 32 of this application does not require special treatment to enhance its rust prevention, corrosion resistance and other requirements.

[0070] The grounding device also includes a grounding limiting mechanism, which includes a third support 133 and a fourth support 134. The third support 133 and the fourth support 134 are located on both sides of the grounding transmission mechanism. When the load switch is in the open state and a grounding operation is performed, an external force drives the grounding operating shaft 31 to rotate. The grounding operating shaft 31 drives the grounding pressure spring crank arm 39 to rotate. The grounding pressure spring crank arm 39 drives the grounding transmission pin 38 to slide along the grounding slide groove 321, thereby driving the tripping pressure spring 37 to store energy. When the rotation reaches the maximum energy storage position of the tripping pressure spring 37, the external force is removed, and the grounding device will continue to rotate under the action of inertia and trip. When the compression spring 37 rotates past the maximum energy storage position, it releases the stored energy and drives the grounding crank arm 32 to rotate through the grounding transmission pin 38 until the grounding compression spring crank arm 39 collides with the fourth support column 134 and stops. During the reset process, the external force drives the grounding operation shaft 31 to rotate in the opposite direction until the grounding compression spring crank arm 39 collides with the third support column 133 and stops. In this embodiment, after reaching the position, the grounding compression spring crank arm 39 is limited by colliding with the third support column 133 or the fourth support column 134, instead of stopping by colliding with the grounding crank arm 32. This reduces the strength requirements of the grounding crank arm, and thus reduces the processing and material requirements of the grounding crank arm.

[0071] The motor drive module is configured as a modular structure. The motor drive module includes a motor 271, a motor output shaft 272, and an electric connecting shaft 273. The electric connecting shaft 273 is installed on the motor output shaft 272. The motor output shaft 272 controls the operation of the electric connecting shaft 273. The electric connecting shaft 273 is provided with gear teeth 275.

[0072] Motor 271 is mounted on frame 1. In this embodiment, motor 271 is mounted on the front side of front mechanism plate 12 via an electric fastener (not shown). The front side is the end face of front mechanism plate 12 facing away from rear mechanism plate 11. Compared with the existing method of mounting motor 271 between front mechanism plate 12 and rear mechanism plate 11, this application mounts motor 271 on the front side of front mechanism plate 12, which facilitates the mounting and dismounting of motor 271. Motor output shaft 272 of motor 271 faces rear mechanism plate 11. Motor output shaft 272 of motor 271 is rotatably connected to front mechanism plate 12 and extends between front mechanism plate 12 and rear mechanism plate 11. Motor 271 can adopt existing structure, which will not be described in detail here.

[0073] The electric connecting shaft 273 is rotatably connected to the intermediate plate 10 and is provided with gear teeth 275. The gear teeth 275 are connected to the transmission mechanism to realize the motion transmission between the closing device and the transmission mechanism.

[0074] In this embodiment, when the motor drive module needs to be replaced, loosen the electric fixing piece and detach the entire motor drive module from the frame 1. The disassembly and assembly direction of the motor drive module is horizontal, which can avoid interference with other components.

[0075] The drive assembly includes a first transmission gear 57, a second transmission gear 58, and a third transmission gear 59. The third transmission gear 59 is fixed to the closing operation shaft 21, the second transmission gear 58 is fixed to the energy storage shaft 50, and the first transmission gear 57 is fixed to the transmission shaft 571. The transmission shaft 571 is rotatably connected to the front mechanism plate 12 and the intermediate plate 10. The first transmission gear 57 meshes with gear teeth 275, the second transmission gear 58 meshes with the first transmission gear 57, and the third transmission gear 59 meshes with the second transmission gear 58, thereby realizing the motion transmission for closing. The motor drive module starts and transmits the motion through the drive assembly. When the tripping crank arm 22 is closed, the tripping spring 37 is compressed and stores energy. At the same time, the motion is transmitted to the energy storage shaft 50 through the second transmission gear 58, and the energy storage spring 522 is stretched and stores energy. When the energy storage crank arm 51 passes the dead point, that is, the energy storage spring 522 reaches the maximum energy storage position, the motor drive module stops running. Under the action of inertia, the energy storage crank arm 51 continues to rotate past the dead point, the energy storage spring 522 resets and releases energy, and the double cam 53 pushes the tripping crank arm 29 to rotate. The tripping crank arm 29 reaches the set position and is resisted by the tripping holding device to maintain the prohibited state, completing the closing action. Then, the closing torque is output to the load switch through the main shaft device.

[0076] In this embodiment, when the motor drive module needs to be replaced, loosen the electric fixing piece and detach the entire motor drive module from the frame 1. The disassembly and assembly direction of the motor drive module is horizontal, which can avoid interference with other components.

[0077] The main spindle device includes a cam plate 41, which is located between the rear mechanism plate 11 of the frame 1 and the load switch. The cam plate 41 is connected to the main spindle of the load switch. The cam plate 41 is provided with a closing and opening limiting arc groove 411 and a grounding limiting arc groove 412. The closing and opening transmission rod 223 is inserted into the closing and opening limiting arc groove 411 and slides along the closing and opening limiting arc groove 411 to realize the linkage between the closing device and the main spindle device. The grounding transmission rod 323 is inserted into the grounding limiting arc groove 412 and slides along the grounding limiting arc groove 412 to realize the linkage between the grounding device and the main spindle device. The linkage between the main spindle device, the closing device, and the grounding device adopts the existing linkage relationship, which will not be described in detail here.

[0078] The indicating device is used to display the status of the load switch, including an indicating spindle 42 and an indicator plate 43. The indicating spindle 42 is connected to the spindle of the load switch, and the indicator plate 43 is connected to the indicating spindle 42. It is used to display the status of the load switch, thereby improving the accuracy of the load switch position status indication.

[0079] The three-station mechanism also includes a micro switch device, which includes a micro switch 44 and a micro cam 45. The micro switch 44 is fixed to the frame 1, and the micro cam 45 is fixed to the indicator spindle 42 or the load switch spindle. The state of the load switch is directly transmitted through the indicator spindle 42. During this process, the protruding end of the micro cam 45 abuts against the micro switch 44, thereby driving the micro switch 44 and switching the micro switch signal. Compared with the existing method of indirectly driving the micro switch 44 through a linkage mechanism, the structure of this application is simpler, the motion transmission is more direct and efficient, and the accuracy and stability of the micro switch signal switching are effectively improved. The number of micro switches 44 and micro cams 45 can be set according to actual needs and is not limited here.

[0080] In this embodiment, the tripping half shaft is driven to rotate by the tripping device to trip the three-position mechanism. The tripping device adopts an existing structure and is not an innovation of this application, so it will not be described in detail here.

[0081] In this embodiment, the opening device, closing device, grounding device, and main shaft device adopt the transmission mechanism of existing structures. The transmission mechanism is not an innovation of this application and will not be described in detail here.

[0082] The three-station mechanism in this embodiment also includes an interlocking device and an interlocking device. The interlocking device ensures that the closing operation shaft 21 and the grounding operation shaft 31 will not be operated at the same time. The interlocking device ensures that the grounding or closing operation can only be performed when both the closing device and the grounding device are in the open state.

[0083] In this embodiment, both the split-joint crank arm 22 and the release crank arm 29 are split structures, and each split is connected by riveting. This allows parts that need to be processed as a whole to be processed individually without affecting each other's processing progress. Furthermore, different processes can be applied to parts in different locations. This not only meets our usage requirements but also minimizes the mutual influence between parts, indirectly reducing processing steps, lowering processing difficulty, and reducing processing costs.

[0084] Other structures not described in this embodiment of the three-station mechanism adopt existing equipment. These other structures are not innovative points of this application and will not be described here.

[0085] Example 2:

[0086] like Figure 15-16As shown, the difference between this embodiment and Embodiment 1 is that the grounding crank arm 32 in Embodiment 1 is an integrally formed structure, while in this embodiment, the grounding crank arm 32 includes a first grounding crank arm plate 321 and a second grounding crank arm plate 322. The first grounding crank arm plate 321 and the second grounding crank arm plate 322 are fixedly connected, preferably by riveting. Therefore, the first grounding crank arm plate 321 and the second grounding crank arm plate 322 can be pre-processed and then riveted together. The connection is simple to manufacture and has relatively low process requirements, thereby effectively improving the production efficiency of the grounding crank arm 32.

[0087] The first grounding crank plate 321 is fixedly provided with a grounding groove 3211, and the grounding transmission pin 38 is located in the grounding groove 3211 and is slidably connected to the grounding groove 3211. The second grounding crank plate 322 is fixedly provided with a grounding transmission rod 323, which is set in the grounding arc groove 116 and is slidably connected to the grounding arc groove 116. The grounding transmission rod 323 is linked with the main shaft device.

[0088] Example 3:

[0089] like Figure 17-18 As shown, the difference between this embodiment and embodiment one is that the tripping crank arm 29 and the closing crank arm 54 are welded parts, while in this embodiment, the tripping crank arm 29 and the closing crank arm 54 are riveted parts.

[0090] The tripping crank arm 29 includes a first split plate 291 and a second split plate 292. The first split plate 291 and the second split plate 292 are riveted together by a number of splitting and engaging transmission pins 28, one of which engages with the upper pressure spring head of the tripping spring 37.

[0091] The first opening and closing plates 291 of the closing crank arm 54 and the tripping crank arm 29 are riveted together by a pin assembly and a riveting post 540.

[0092] The components of the tripping crank arm 29 and the closing crank arm 54 can be pre-processed and riveted together for direct use without further processing.

[0093] In other embodiments, the splitting crank arm 22, the release crank arm 29, the upper pressure spring head, and the lower pressure spring head can be configured as an integral molding structure. The upper pressure spring head, the lower pressure spring head, and the splitting crank arm 22 are injection molded parts, which can be used without secondary processing. Compared with the traditional cast steel structure, this application does not require special treatment to enhance its rust prevention, corrosion resistance, and other requirements.

[0094] In other embodiments, the closing crank arm 54, the first pin 541, and the second pin 542 can be configured as an integral structure.

[0095] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A three-position mechanism with rapid tripping function, characterized in that: The system includes a frame, on which are mounted a closing device, a opening device, a grounding device, an opening tripping device, an energy storage device, a motor drive module, and a spindle assembly. The motor drive module is detachably mounted on the frame and has a modular structure. A transmission mechanism, including a double cam, connects the closing device and the energy storage device. The energy storage device releases energy and drives the closing device to close via the double cam. The opening device is linked to the opening tripping device, and the opening tripping device is linked to the closing device. The closing device and the grounding device are respectively linked to the spindle assembly. The spindle assembly outputs closing / opening torque and grounding torque to the load switch. The opening tripping device includes a tripping crank arm, a grounding spring crank arm, and a tripping spring. The crank arm is mounted on the closing operating shaft. The tripping crank arm is fixedly connected to the opening and closing crank arm. The tripping crank arm and the opening and closing crank arm rotate synchronously. The free end of the tripping crank arm is provided with an opening and closing transmission pin. The grounding spring crank arm is mounted on the grounding operating shaft. The free end of the grounding spring crank arm is provided with a grounding transmission pin. The closing device includes a closing operating shaft and an opening and closing drive mechanism. The opening and closing drive mechanism includes an opening and closing crank arm, which is mounted on the closing operating shaft and fixedly connected to the tripping crank arm. The opening and closing crank arm is fixedly provided with an opening and closing transmission rod. The grounding device includes a grounding operating shaft and a grounding transmission mechanism. The grounding operating shaft is rotatably connected to the rear mechanism plate and the front mechanism plate of the frame. The grounding transmission mechanism includes a grounding crank arm, which is rotatably connected to the grounding operating shaft.

2. The three-position mechanism with rapid tripping function according to claim 1, characterized in that: The frame includes a rear mechanism plate, a front mechanism plate, and an intermediate plate. The rear mechanism plate and the front mechanism plate are fixedly connected by a support column assembly. The intermediate plate is fixed between the rear mechanism plate and the front mechanism plate. The rear mechanism plate, the intermediate plate, and the front mechanism plate are provided with several pressure ribs. The rear mechanism plate is fixed with a switching arc groove and a grounding arc groove. The ends of the arc grooves at both ends of the switching arc groove and the grounding arc groove are provided with switching reinforcing ribs.

3. A three-position mechanism with rapid tripping function according to claim 1, characterized in that: The energy storage device includes an energy storage shaft, an energy storage crank arm, and an energy storage compression spring assembly. The energy storage shaft is rotatably connected to the front mechanism plate and the middle plate of the frame. The energy storage crank arm is fixedly mounted on the energy storage shaft. The energy storage compression spring assembly includes an upper energy storage plate, an energy storage spring, and a lower energy storage plate. The upper and lower ends of the energy storage spring are fixedly connected to the upper energy storage plate and the lower energy storage plate, respectively. The upper energy storage plate is connected to the free end of the energy storage crank arm, and the lower energy storage plate is connected to the rear mechanism plate of the frame.

4. A three-position mechanism with rapid tripping function according to claim 1, characterized in that: The transmission mechanism also includes a closing crank arm, with a double cam fixed on the energy storage shaft. The double cam includes a first protrusion and a second protrusion. The closing crank arm is set on the closing operation shaft of the closing device. The closing crank arm and the tripping crank arm are fixedly connected by a pin assembly. The closing crank arm, the tripping crank arm, and the opening and closing crank arm rotate synchronously. The pin assembly includes a first pin and a second pin. The second protrusion, the first protrusion, the first pin, and the second pin are distributed in sequence along the horizontal direction, and the second protrusion, the first protrusion, the first pin, and the second pin are in the same vertical plane.

5. A three-position mechanism with rapid tripping function according to claim 4, characterized in that: The sum of the distance between the top of the second protrusion and the axis of the energy storage shaft and the distance between the top of the first pin and the axis of the closing operation shaft is greater than the distance between the axis of the energy storage shaft and the axis of the closing operation shaft. The sum of the distance between the top of the first protrusion and the axis of the energy storage shaft and the distance between the top of the second pin and the axis of the closing operation shaft is greater than the distance between the axis of the energy storage shaft and the axis of the closing operation shaft.

6. A three-position mechanism with rapid tripping function according to claim 1, characterized in that: It also includes a device to prevent secondary closing, which includes an energy storage upper plate and a tripping crank arm. The energy storage upper plate is connected to the free end of the energy storage crank arm and the energy storage spring, respectively. When the circuit is closed, the energy storage spring is reset from the stretched state to release energy, and the energy storage upper plate abuts against the tripping crank arm.

7. A three-position mechanism with rapid tripping function according to claim 1, characterized in that: The grounding device also includes a grounding limiting mechanism, which includes a third support and a fourth support. The third support and the fourth support are located on both sides of the grounding transmission mechanism. When the load switch is in the grounding operation state, the grounding spring crank arm abuts against the fourth support. When the load switch is in the grounding reset state, the grounding spring crank arm abuts against the third support.

8. A three-position mechanism with rapid tripping function according to claim 1, characterized in that: The motor drive module includes an electric body, a motor, and an electric connecting shaft. The motor and the electric connecting shaft are mounted on the electric body. The motor controls the operation of the electric connecting shaft, and the electric connecting shaft is equipped with gear teeth.

9. A three-position mechanism with rapid tripping function according to claim 8, characterized in that: The electric motor is mounted on the front of the front mechanism plate of the frame, with the motor and electric connecting shaft on the same side and facing the middle plate of the frame.

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