Modular half shaft trip mechanism

Abstract

The application relates to the technical field of contact operating mechanisms, and provides a modularized half-shaft tripping mechanism which comprises a frame plate, a closing electromagnet fixed on the frame plate, a closing top plate rotatably installed on the frame plate, one end of the closing top plate used for cooperating with the closing electromagnet, a connecting rod rotatably connected to the other end of the closing top plate, a rotating arm of a closing half-shaft rotatably connected to the other end of the connecting rod, the closing half-shaft rotatably arranged on the frame plate, and a secondary latch rotatably arranged on the frame plate, wherein the secondary latch is provided with a latch shaft rotatably arranged on the frame plate, a first supporting part and a second supporting part fixed on the latch shaft, and the first supporting part abuts against the closing half-shaft and has a predetermined tripping amount between the first supporting part and the closing half-shaft, and the second supporting part abuts against a cam in an energy storage state. Therefore, the pressure borne by the closing half-shaft and the secondary latch does not need to be directed to the shaft center, the requirement for the installation precision is effectively reduced, and the controllability and safety of the closing action are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of contact operation mechanism, and particularly relates to a modular half-shaft release mechanism. Background Technology

[0002] See Figure 1 In existing vacuum circuit breakers, when in energy storage mode, cam 22 presses against pressure plate 12. Combined with... Figure 2 When the closing electromagnet 1 receives the closing signal, it pushes out and drives the closing top plate 2 to rotate counterclockwise. The connecting rod 21, which is rotatably connected to the closing top plate 2, is rotatably connected at its other end to the rotating arm of the closing shaft 11. The closing shaft 11 is fixedly connected to the pressure plate 12. At this time, the pressure plate 12 rotates counterclockwise with the closing shaft 11 and disengages from the cam 22. The cam 22 rotates counterclockwise under the drive of the energy storage spring, thereby pushing the crank arm 13 to rotate. Finally, the roller 15 of the crank arm 13 tightly abuts against the first-stage actuator 14, thereby completing the closing action.

[0003] In the energy storage state, cam 22 presses against pressure plate 12 and applies a certain preload to it. The direction of this force needs to be towards the axis of the closing shaft 11; therefore, during assembly, the positional relationship between cam 22 and pressure plate 12 needs to be controlled extremely precisely, and the adjustment range of the engagement amount between the two is extremely small.

[0004] If the engagement between cam 22 and pressure plate 12 is too large, the pressure on pressure plate 12 will be directed above the axis of closing shaft 11. When closing, closing shaft 11 will need to overcome a large frictional force to rotate. If the frictional force is too large, pressure plate 12 and cam 22 will not be able to disengage, and the coil of closing electromagnet 1 may even be burned out.

[0005] Conversely, if the engagement amount between the cam 22 and the pressure plate 12 is too small, the direction of the pressure on the pressure plate 12 will be below the axis of the closing shaft 11. Under the action of the energy storage spring, the cam 22 will overcome the friction between the cam 22 and the pressure plate 12, thereby rotating and disengaging from it; thus causing the closing to be completed without receiving a closing signal, resulting in a major safety accident.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0007] The technical problem solved by this invention is to reduce assembly difficulty and avoid situations such as poor closing or self-closing. By cooperating with the closing half-shaft and the secondary actuator, the pressure it receives does not need to be directed towards the shaft center; this effectively reduces the requirements for installation accuracy and improves the controllability and safety of the closing action.

[0008] To address the aforementioned problems, this invention provides a modular half-shaft tripping mechanism, comprising a frame plate on which a closing electromagnet is fixed; and a closing top plate is rotatably mounted on the frame plate.

[0009] One end of the closing top plate is used to cooperate with the closing electromagnet, and the other end is rotatably connected to the connecting rod; the other end of the connecting rod is rotatably connected to the rotating arm of the closing half shaft; the closing half shaft is rotatably mounted on the frame plate.

[0010] A secondary actuator is rotatably mounted on the frame plate; the secondary actuator has an actuator shaft rotatably mounted on the frame plate, and a first support and a second support are fixed on the actuator shaft; in the energy storage state, the first support abuts against the brake half shaft and there is a predetermined engagement amount between the two, and the second support abuts against the cam.

[0011] According to the modular half-shaft release mechanism of the present invention, the second support part of the secondary actuator and the contact surface with the cam are arc-shaped structures; in the energy storage state, the pressure applied by the cam to the second support part is directed above the center of the actuator shaft.

[0012] According to the modular half-shaft release mechanism of the present invention, the engagement amount between the closing half-shaft and the first support part of the secondary actuator is 1.5-3mm.

[0013] According to the modular half-shaft release mechanism of the present invention, the actuator shaft of the secondary actuator is also sleeved with a reset torsion spring; the reset torsion spring has two claws, one claw is engaged with the second support part, and the other claw is engaged with the frame plate.

[0014] According to the modular half-shaft tripping mechanism of the present invention, the closing top plate is made of magnetic material, and an assist component is also installed on the frame plate;

[0015] The assisting component includes an assisting plate positioned opposite the closing top plate; a guide rod movably passes through the assisting plate; one end of the guide rod is fixedly connected to an assisting magnetic block, and the other end is fixedly connected to a driving magnetic block; a reset spring is also sleeved on the guide rod between the driving magnetic block and the assisting plate; an assisting electromagnet is also positioned opposite the driving magnetic block; and a top plate sensor fixed to the frame plate for detecting the passage of the closing top plate is also included.

[0016] According to the modular half-shaft tripping mechanism of the present invention, the side of the drive magnetic block facing the closing top plate has an arc-shaped protrusion.

[0017] According to the modular half-shaft release mechanism of the present invention, a separation push rod is fixed on the assist plate.

[0018] In summary, this invention, through the cooperation between the closing half-shaft and the secondary actuator, eliminates the need for the direction of pressure on the secondary actuator to point towards the shaft center. Furthermore, it increases the adjustment space during installation, effectively reducing the requirements for installation accuracy and improving the controllability and safety of the closing action. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the current energy storage technology.

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure in the closed state;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention;

[0022] Figure 4 yes Figure 3 Schematic diagram of the structure of region B in the middle;

[0023] Figure 5 yes Figure 3 Schematic diagram of the structure of region A in the middle;

[0024] Figure 6 yes Figure 5 A schematic diagram of the structure in its working state;

[0025] In the diagram: 1-Closing electromagnet, 11-Closing shaft, 12-Pressure plate, 13-Crank arm, 14-First stage lever, 15-Roller; 2-Closing top plate, 21-Connecting rod, 22-Cam, 23-Closing half shaft; 3-Second stage lever, 31-Reset torsion spring; 4-Assist plate, 41-Assist magnetic block, 42-Guide rod, 43-Reset spring, 44-Drive magnetic block, 45-Assist electromagnet, 46-Top plate sensor, 47-Separation push rod. Detailed Implementation

[0026] See Figure 3 The present invention provides a modular half-shaft tripping mechanism, including a frame plate, on which a closing electromagnet 1 is fixed; a closing top plate 2 is also rotatably mounted on the frame plate;

[0027] One end of the closing top plate 2 is used to cooperate with the closing electromagnet 1, and the other end is rotatably connected to the connecting rod 21; the other end of the connecting rod 21 is rotatably connected to the rotating arm of the closing half shaft 23; the closing half shaft 23 is rotatably mounted on the frame plate.

[0028] The frame plate is also rotatably provided with a secondary actuator 3; the secondary actuator 3 has an actuator shaft rotatably provided on the frame plate, and a first support part and a second support part are fixed on the actuator shaft; in the energy storage state, the first support part abuts against the brake half shaft 23, and the second support part abuts against the cam 22.

[0029] After the closing signal is issued, the closing electromagnet 1 pushes the closing top plate 2 to rotate counterclockwise, and then the connecting rod 21 drives the closing half shaft 23 to rotate counterclockwise and disengage from the secondary actuator 3; the cam 22 rotates counterclockwise under the action of the energy storage spring, disengages from the secondary actuator 3, and further completes the closing operation.

[0030] Combination Figure 4 The second support of the secondary actuator 3 has an arc-shaped contact surface with the cam 22. In the energy storage state, the pressure (F) applied by the cam 22 to the second support is directed above the center of the actuator shaft. Under the action of the pressure (F), the secondary actuator 3 tends to rotate counterclockwise, but it will not rotate when the closing half shaft 23 is against the first support, thus avoiding the occurrence of self-closing and improving safety.

[0031] During the closing process, after the closing half-shaft 23 rotates and disengages from the first support, the cam 22 can rotate accordingly to complete the closing operation. The engagement amount between the closing half-shaft 23 and the first support can be controlled within a reasonable range, thus the resistance to disengagement is controllable, avoiding situations where disengagement fails. Preferably, the engagement amount between the closing half-shaft 23 and the first support of the secondary actuator 3 is 1.5-3mm.

[0032] Even better, the actuator shaft of the secondary actuator 3 is also sleeved with a reset torsion spring 31; the reset torsion spring 31 has two claws, one claw engaging with the second support and the other claw engaging with the frame plate. After the cam 22 disengages from the second support, the reset torsion spring 31 drives the secondary actuator 3 to reset.

[0033] The present invention, through the cooperation of the closing half shaft 23 and the secondary actuator 3, eliminates the need for the direction of the pressure on the secondary actuator 3 to point towards the shaft center. Furthermore, it increases the adjustment space during installation, effectively reducing the requirements for installation accuracy and improving the controllability and safety of the closing action.

[0034] With increased use, components age and wear increases, leading to a decrease in the thrust of the closing electromagnet 1 and an increase in the frictional force causing the closing half-shaft 23 to disengage from the secondary actuator 3. To ensure smooth disengagement during closing, an assistive component is also installed on the frame plate of this invention.

[0035] See Figure 5 The assisting component includes an assisting plate 4 positioned opposite the closing top plate 2; a guide rod 42 is movably threaded through the assisting plate 4; one end of the guide rod 42 is fixedly connected to an assisting magnetic block 41, and the other end is fixedly connected to a driving magnetic block 44; a return spring 43 located between the driving magnetic block 44 and the assisting plate 4 is also sleeved on the guide rod 42; and an assisting electromagnet 45 is also positioned opposite the driving magnetic block 44.

[0036] The closing top plate 2 is made of magnetic material.

[0037] See Figure 6 After the closing signal is issued, the closing electromagnet 1 pushes the closing top plate 2 to rotate. The assisting electromagnet 45 briefly generates magnetism by applying DC current, and the driving magnetic block 44, under the action of magnetic repulsion, pushes the guide rod 42 forward, compressing the return spring 43; the driving magnetic block 44 approaches or attracts the closing top plate 2; then the return spring 43 drives the driving magnetic block 44 to retract, thereby generating a pulling force on the closing top plate 2, thus providing assistance for the subsequent disengagement of the closing half shaft 23 from the secondary actuator 3.

[0038] Since the movement trajectory of the closing top plate 2 is a rotation around the fulcrum, in order to make the driving magnetic block 44 more effectively generate a magnetic attraction force on the closing top plate 2, it is preferable that the driving magnetic block 44 has an arc-shaped protrusion on the side facing the closing top plate 2.

[0039] Furthermore, to prevent the assisting magnetic block 41 from becoming unable to detach from the closing top plate 2, a separation push rod 47 is fixed on the assisting plate 4. When retracted, the separation push rod 47 can abut against the closing top plate 2, which facilitates the reset spring 43 to pull the driving magnetic block 44 away from the closing top plate 2.

[0040] Even better, the assist component also includes a top plate sensor 46 fixed to the frame plate for detecting the passage of the closing top plate 2; when the passage of the closing top plate 2 is detected, the assist electromagnet 45 is energized and the guide rod 42 extends.

[0041] The inventors tested the tripping mechanism of this invention on various types of circuit breakers and achieved good results, especially on the 12kV series LTK-12 indoor high-voltage sulfur hexafluoride circuit breaker.

[0042] In summary, the present invention provides a modular half-shaft tripping mechanism. By cooperating with the closing half-shaft and the secondary actuator, the direction of the pressure on the secondary actuator does not need to point towards the shaft center. Furthermore, the adjustment space is increased during installation, effectively reducing the installation accuracy requirements and improving the controllability and safety of the closing action.

[0043] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A modular half-shaft release mechanism, characterized in that, The system includes a frame plate on which a closing electromagnet is fixed; a closing top plate is also rotatably mounted on the frame plate. One end of the closing top plate is used to cooperate with the closing electromagnet, and the other end is rotatably connected to the connecting rod; the other end of the connecting rod is rotatably connected to the rotating arm of the closing half shaft; the closing half shaft is rotatably mounted on the frame plate. A secondary actuator is rotatably mounted on the frame plate; the secondary actuator has an actuator shaft rotatably mounted on the frame plate, and a first support and a second support are fixed on the actuator shaft; in the energy storage state, the first support abuts against the brake half shaft and there is a predetermined engagement amount between the two, and the second support abuts against the cam. The closing top plate is made of magnetic material, and an assist component is also installed on the frame plate; The assisting component includes an assisting plate positioned directly opposite the closing top plate; a guide rod movably passes through the assisting plate; one end of the guide rod is fixedly connected to an assisting magnetic block, and the other end is fixedly connected to a driving magnetic block; a return spring is also sleeved on the guide rod between the driving magnetic block and the assisting plate; it also includes an assisting electromagnet positioned directly opposite the driving magnetic block; and a top plate sensor fixedly mounted on the frame plate for detecting the passage of the closing top plate. The driving magnetic block has an arc-shaped protrusion on the side facing the closing top plate; a separation push rod is fixed on the assist plate.

2. The modular half-shaft release mechanism as described in claim 1, characterized in that, The second support of the secondary actuator has an arc-shaped contact surface with the cam; in the energy storage state, the pressure exerted by the cam on the second support is directed above the center of the actuator shaft.

3. The modular half-shaft release mechanism as described in claim 1, characterized in that, The engagement amount between the closing half-shaft and the first support part of the secondary actuator is 1.5-3mm.

4. The modular half-shaft release mechanism as described in claim 1, characterized in that, The secondary actuator's actuator shaft is also sleeved with a reset torsion spring; the reset torsion spring has two claws, one claw engaging with the second support part and the other claw engaging with the frame plate.

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