A three-station mechanism drive assembly

Abstract

This utility model relates to the field of switchgear technology, proposing a three-station mechanism drive assembly. Through the energy storage and release process of a torsion bar spring, it achieves rapid switching of the spindle assembly, effectively shortening operation time and improving circuit switching efficiency. The locking function of the pawl locking assembly ensures stable positioning of the output panel in the waiting state, preventing accidental rotation and improving the operational reliability of the three-station mechanism. The torsion bar spring stores energy through torsion and is easy to install on the spindle assembly of the three-station machine. Simultaneously, this three-station mechanism drive assembly integrates closing (connection), isolation, and grounding functions into one unit, simplifying the internal structure of the switchgear, reducing equipment size and manufacturing costs, and meeting the power system's requirements for compact and economical switchgear.

Description

Technical Field

[0001] This utility model relates to the technical field of switch cabinets, specifically to a three-station mechanism drive assembly. Background Technology

[0002] In power systems, switchgear, as a crucial piece of electrical equipment, undertakes the critical tasks of controlling, protecting, and isolating circuits. Disconnecting switches and grounding switches are indispensable components of switchgear. Disconnecting switches isolate the power supply, ensuring the safety of maintenance personnel, while grounding switches ground the circuit during equipment maintenance, releasing residual charge and ensuring the safety of personnel and equipment.

[0003] With the increasing demands for safety, reliability, compactness, and economy in power systems, three-position operating mechanisms that integrate the operation of disconnecting switches and grounding switches have emerged. These three-position operating mechanisms can switch between closing, disconnecting, and grounding states, effectively solving the problems of traditional independent operating mechanisms. They have become a key component in the field of switchgear technology for achieving integrated operation of disconnecting switches and grounding switches, and are of great significance for improving the overall performance of switchgear. Utility Model Content

[0004] This invention proposes a three-station mechanism drive assembly. Through the energy storage and release process of a torsion bar spring, the spindle assembly drives the switch to rotate, effectively shortening operation time and improving circuit switching efficiency. The pawl locking assembly ensures stable positioning of the output panel in the waiting state, preventing accidental rotation and improving the operational reliability of the three-station mechanism. The torsion bar spring stores energy through torsion and is easy to install on the spindle assembly of the three-station machine. Furthermore, this three-station mechanism drive assembly integrates closing (connection), isolation, and grounding functions into one unit, simplifying the internal structure of the switchgear, reducing equipment size and manufacturing costs, and meeting the power system's requirements for compact and economical switchgear.

[0005] A three-station mechanism drive assembly designed for this purpose includes a frame, on which:

[0006] An output panel, which is rotatably connected to the frame;

[0007] A pawl locking assembly for restraining the rotation of the output disk;

[0008] A pusher, which is rotatably connected to the frame and used to drive the pawl locking assembly to unlock the output disk;

[0009] A spindle assembly is used to connect with a guillotine drive. The spindle assembly is provided with a torsion bar spring. The pusher is fixedly connected to the torsion bar spring. The spindle assembly, the output disk, and the torsion bar spring are fixedly connected. The spindle assembly is provided with a hollow part for housing the torsion bar spring.

[0010] In the initial state, the pawl locking assembly is locked to the output disk. When the pusher rotates, the first segment of the torsion bar spring rotates with the pusher. The last segment of the torsion bar spring does not rotate when the output disk is locked, allowing the torsion bar spring to achieve elastic deformation and store energy. When the pusher rotates to unlock the pawl locking assembly and the output disk, the torsion bar spring releases its elastic potential energy. The last segment of the torsion bar spring drives the output disk and the spindle assembly to rotate until the pawl locking assembly and the output disk are locked again, causing the spindle assembly to drive the guillotine to switch sequentially between the connected position, the isolated position, and the grounded position.

[0011] The three-station mechanism drive assembly includes:

[0012] The stop assembly is used to constrain the rotation of the output disk when the switch is switched to the on position or the ground position. The stop assembly and the pawl locking assembly constrain the output disk from the forward and reverse rotation directions of the output disk, respectively.

[0013] The stop assembly includes a stop block disposed on the output panel and a stop member disposed on the frame;

[0014] When the switch is in the ON position, the first end of the stop block abuts against the stop member;

[0015] When the switch is in the grounding position, the second end of the stop block abuts against the stop member;

[0016] The stop block is arc-shaped and located at the rear of the output disk. Both ends of the stop block are provided with arc-shaped recesses that cooperate with the stop member. The outer surface of the stop member is provided with an arc surface for abutting against the arc-shaped recesses.

[0017] The output disk has a single arc-shaped protrusion on its side;

[0018] The pawl locking assembly includes a first pawl, a second pawl, a third pawl, and a fourth pawl arranged in a clockwise direction, each pawl having an arc-shaped surface that mates with the arc-shaped protrusion;

[0019] When the switch is in the ON position, the first end of the arc-shaped protrusion abuts against the first pawl.

[0020] When the guillotine is in the isolated position, the first end of the arc-shaped protrusion abuts against the fourth pawl, and the second end of the arc-shaped protrusion abuts against the third pawl.

[0021] When the switch is in the grounding position, the second end of the arc-shaped protrusion abuts against the second pawl.

[0022] The pusher has a single pusher boss on its side. When the pusher rotates, the pusher boss drives the pawl locking assembly to rotate, thereby unlocking the pawl locking assembly from the output disk.

[0023] The pawl locking assembly includes four pawls that are elastically rotatably disposed around the output disk. The four pawls are arranged circumferentially at intervals. Each pawl is provided with a push post. When the push post rotates, it contacts the push post of one of the pawls and drives the pawl to rotate and disengage from the output disk. The frame is provided with a torsion spring for driving the pawl to move in the direction of locking the output disk.

[0024] The frame is equipped with an operating device;

[0025] The operating device includes a first input shaft and a second input shaft for driving the pusher to operate;

[0026] The first input shaft and the second input shaft are respectively connected to the driving component for transmission.

[0027] The operating device includes a first gear coaxially connected to the first input shaft and a second gear coaxially connected to the second input shaft; the frame is provided with a transmission gear coaxially connected to the pusher, and the first gear and the second gear respectively mesh with the transmission gear;

[0028] When the first input shaft rotates, it drives the pusher to rotate through the first gear and the transmission gear.

[0029] When the second input shaft rotates, it drives the pusher to rotate through the second gear and the transmission gear.

[0030] The frame includes a first mounting plate and a second mounting plate;

[0031] An installation space for mounting the output disk and the pawl locking assembly is formed between the first mounting plate and the second mounting plate. The pusher is coaxially arranged with the output disk. The pusher, the first input shaft and the second input shaft are respectively rotatably connected to the first mounting plate and located outside the installation space.

[0032] The output disk and the pawl locking assembly are respectively rotatably connected to the second mounting plate.

[0033] The pusher is provided with a connecting shaft that is rotatably connected to the first mounting plate. The pusher, the connecting shaft, and the torsion spring are fixedly connected. The first section of the torsion spring is fixedly connected to the connecting shaft. The connecting shaft is provided with a square hole for inserting the torsion spring.

[0034] The spindle assembly includes a connecting arm connected to the guillotine and a spindle fixedly connected to the connecting arm. The connecting shaft and the spindle are coaxially arranged, and the spindle is fixedly connected to the output disk. A torsion bar spring is inserted into the spindle, and the spindle has a hollow part with a built-in torsion bar spring. The spindle also has fasteners for fixing the tail section of the torsion bar spring.

[0035] The output disk is located at the rear of the pusher, and the front section of the main shaft is fixedly connected to the output disk. The rear section of the main shaft extends axially along the rear of the output disk and is fixedly connected to the tail section of the torsion bar spring, so that the tail section of the torsion bar spring is fixedly connected to the main shaft and the output disk by fasteners.

[0036] The front section of the main shaft passes through the second mounting plate and is coaxially mounted with the connecting shaft of the pusher, so that the output disc is rotatably mounted on the frame, and the first section of the torsion bar spring passes through the main shaft and is inserted into the square hole of the connecting shaft;

[0037] The second mounting plate is equipped with a torsion spring and a limiting post for each pawl. One end of the torsion spring elastically abuts against the corresponding pawl, and the other end of the torsion spring elastically abuts against the corresponding limiting post, so that each pawl can elastically rotate on the frame.

[0038] The beneficial technical effects of this utility model are as follows:

[0039] The three-station mechanism drive assembly utilizes the energy storage and release process of a torsion bar spring to drive the switch rotation via the spindle assembly, effectively shortening operation time and improving circuit switching efficiency. The pawl locking assembly ensures stable positioning of the output panel in the waiting state, preventing accidental rotation and enhancing the operational reliability of the three-station mechanism. The torsion bar spring stores energy through torsion and is easily installed on the spindle assembly of the three-station machine. Furthermore, this three-station mechanism drive assembly integrates closing (connection), isolation, and grounding functions into one unit, simplifying the internal structure of the switchgear, reducing equipment size and manufacturing costs, and meeting the power system's requirements for compact and economical switchgear. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a pusher component with a pusher boss in one embodiment of the present invention.

[0041] Figure 2 This is a three-dimensional structural diagram of a pusher component with a pusher boss according to an embodiment of the present invention.

[0042] Figure 3 This is a schematic diagram of the transmission connection between the operating device and the pushing component in one embodiment of the present invention.

[0043] Figure 4 This is a three-dimensional structural diagram of the transmission connection between the operating device and the pushing component in one embodiment of the present invention.

[0044] Figure 5 This is a schematic diagram of the structure of the pawl locking assembly and the output disk in one embodiment of the present invention.

[0045] Figure 6 This is a three-dimensional structural diagram of the ratchet locking assembly and the output disk in one embodiment of the present invention.

[0046] Figure 7 This is a schematic diagram of the spindle assembly according to an embodiment of the present invention.

[0047] Figure 8This is a schematic diagram of the structure of the output panel constrained when the switch is in the ON position, according to an embodiment of the present invention.

[0048] Figure 9 This is a schematic diagram of the structure of the output panel constrained when the switch is in the isolation position, according to an embodiment of the present invention.

[0049] Figure 10 This is a schematic diagram of the structure of the output panel constrained when the switch is in the grounded position, according to an embodiment of the present invention. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0051] See Figures 1-10 A three-station mechanism drive assembly includes a frame 5, on which:

[0052] Output disk 3, which is rotatably connected to frame 5;

[0053] A pawl locking assembly 6 is used to constrain the rotation of the output disk 3;

[0054] Pusher 2, which is rotatably connected to the frame 5 and is used to drive the pawl locking assembly 6 to unlock the output disk 3;

[0055] The main spindle assembly 1 is used to connect with the guillotine drive. The main spindle assembly 1 is provided with a torsion bar spring 4. The pusher 2 is fixedly connected to the torsion bar spring 4. The main spindle assembly 1, the output disk 3, and the torsion bar spring 4 are fixedly connected. The main spindle assembly 1 is provided with a hollow part for housing the torsion bar spring 4.

[0056] In the initial state, the pawl locking assembly 6 is locked to the output disk 3. When the pusher 2 rotates, the first segment of the torsion spring 4 rotates with the pusher 2. The tail segment of the torsion spring 4 does not rotate when the output disk 3 is locked, so that the torsion spring 4 can achieve elastic deformation to store energy. When the pusher 2 rotates to unlock the pawl locking assembly 6 and the output disk 3, the torsion spring 4 releases elastic potential energy. The tail segment of the torsion spring 4 drives the output disk 3 and the spindle assembly 1 to rotate until the pawl locking assembly 6 and the output disk 3 are locked again, so that the spindle assembly 1 drives the guillotine to switch sequentially between the connected position, the isolated position and the grounded position.

[0057] This three-position mechanism drive assembly uses the energy storage and release process of the torsion bar spring 4 to enable the main shaft assembly 1 to drive the switch to switch to the ON, Isolation, or Grounding position. The locking function of the pawl locking assembly 6 ensures that the output panel 3 is stably positioned in the waiting state, preventing accidental rotation and improving the working reliability of the three-position mechanism. The torsion bar spring 4 stores energy through torsion and is installed on the main shaft assembly 1 of the three-position mechanism. At the same time, this three-position mechanism drive assembly integrates the three functions of closing (ON), isolating, and grounding into one unit, simplifying the internal structure of the switchgear, reducing equipment size and manufacturing costs, and meeting the requirements of power systems for compact and economical switchgear.

[0058] The three-station mechanism drive assembly includes:

[0059] The stop assembly is used to constrain the rotation of the output disk 3 when the switch is switched to the on position or the ground position. The stop assembly and the pawl locking assembly 6 constrain the output disk 3 from the forward and reverse rotation directions of the output disk 3, respectively.

[0060] The stop assembly includes a stop block 3.2 disposed on the output disk 3 and a stop member 6.3 disposed on the frame 5;

[0061] When the switch is in the ON position, the first end of the stop block 3.2 abuts against the stop member 6.3;

[0062] When the switch is in the grounding position, the second end of the stop block 3.2 abuts against the stop member 6.3;

[0063] The stop block 3.2 is arc-shaped and is located at the rear of the output disk 3. Both ends of the stop block 3.2 are respectively provided with arc-shaped recesses that cooperate with the stop member 6.3; the outer surface of the stop member 6.3 is provided with an arc surface for abutting against the arc-shaped recesses.

[0064] The stop block 3.2 is fixed to the rear of the output disk 3 by screws or welding.

[0065] The stop assembly can prevent the output disc 3 from exceeding the corresponding designated rotation position when the torsion bar spring 4 releases its elastic potential energy, effectively blocking the rotation of the output disc 3, so that the output disc 3 can rotate to the corresponding designated position when the switch is switched to the corresponding position.

[0066] The output disk 3 has a single arc-shaped protrusion 3.1 on its side;

[0067] The pawl locking assembly 6 includes a first pawl 6.11, a second pawl 6.12, a third pawl 6.13 and a fourth pawl 6.14 arranged in a clockwise direction, and each pawl is provided with an arc-shaped surface that mates with the arc-shaped protrusion 3.1;

[0068] When the switch is in the ON position, the first end of the arc-shaped protrusion 3.1 abuts against the first pawl 6.11;

[0069] When the switch is in the isolated position, the first end of the arc-shaped protrusion 3.1 abuts against the fourth pawl 6.14, and the second end of the arc-shaped protrusion 3.1 abuts against the third pawl 6.13;

[0070] When the switch is in the grounding position, the second end of the arc-shaped protrusion 3.1 abuts against the second pawl 6.12.

[0071] When the switch is in the isolation position, the push boss 2.1 of the pusher 2 pushes the third pawl 6.13 away as the pusher 2 rotates. The third pawl 6.13 disengages from the output disk 3. The output disk 3 rotates in the forward direction as the torsion spring 4 releases its elastic force. The arc surface of the output disk 3 rotates along the arc surfaces of the first pawl 6.11 and the second pawl 6.12 until the first end of the stop block 3.2 abuts against the stop 6.3. The first end of the arc protrusion 3.1 abuts against the first pawl 6.11. That is, the output disk 3 rotates until the switch is in the on position. Similarly, when the switch is in the isolation position, the push boss 2.1 of the pusher 2 pushes open the fourth pawl 6.14 as the pusher 2 rotates, the output disk 3 rotates in the opposite direction, and the output disk 3 rotates along the arc surface of the second pawl 6.12 and the first pawl 6.11 until the second end of the stop block 3.2 abuts against the stop 6.3, and the arc-shaped protrusion 3.1 abuts against the second pawl 6.12, that is, the output disk 3 rotates until the switch is in the ground position.

[0072] The combination of a single arc-shaped protrusion 3.1 and a pawl 6.1 forms a locking mechanism for the output disk 3, effectively limiting its rotational freedom and ensuring its stability in a waiting state. The pawl 6.1, abutting the arc-shaped protrusion 3.1, provides circumferential positioning, preventing circumferential displacement of the output disk 3. The stop block 3.2 and the stop 6.3 cooperating with it constrain the circumferential rotation of the output disk 3. Their combined action improves the locking reliability of the output disk 3. This dual-point locking structure simplifies the mechanism design, reduces unnecessary parts, and lowers the complexity and cost of the mechanism while ensuring locking effectiveness. Furthermore, the design of the single arc-shaped protrusion 3.1 simplifies the structure of the output disk 3, reduces machining steps and material costs, and facilitates manufacturing and maintenance.

[0073] The pusher 2 has a single push boss 2.1 on its side. When the pusher 2 rotates, the push boss 2.1 drives the pawl locking assembly 6 to rotate, thereby unlocking the pawl locking assembly 6 from the output disk 3.

[0074] The cam structure design of the push boss 2.1 enables the pusher 2 to push the pawl locking assembly 6 during rotation, thus triggering the unlocking state between the output disk 3 and the pawl locking assembly 6. Simultaneously, the first end of the torsion spring 4 twists along with the rotation of the pusher 2. When the torsion spring 4 releases its elastic potential energy, the output disk 3 rotates along with the tail end of the torsion spring 4. This cam structure design of the push boss 2.1 provides excellent mechanical transmission characteristics, effectively converting the rotation of the pusher 2 into efficient driving of the pawl locking assembly 6, thus improving the operational reliability of the mechanism. Furthermore, the design of a single push boss 2.1 simplifies the structure of the pusher 2, reduces machining steps and material costs, and facilitates manufacturing and maintenance. In addition, the smooth curve of the cam structure reduces impact and noise during the drive process, improving the smooth operation of the mechanism.

[0075] The pawl locking assembly 6 includes four pawls 6.1 that are elastically rotatably disposed around the output disk 3. The four pawls 6.1 are arranged circumferentially at intervals. Each pawl 6.1 is provided with a push post 6.2. When the pusher 2 rotates, it contacts the push post 6.2 of one of the pawls 6.1 and drives the pawl 6.1 to rotate and disengage from the output disk 3. The frame 5 is provided with a torsion spring 17 for driving the pawl 6.1 to move toward locking the output disk 3.

[0076] Four pawls 6.1 are elastically rotatably positioned around the output disk 3, providing a stable locking effect and ensuring reliable positioning of the output disk 3 in three states: connected, isolated, and grounded. The cooperation between the push post 6.2 and the push member 2 allows the rotation of the push member 2 to be precisely transmitted to the corresponding pawl 6.1, driving the pawl 6.1 to rotate and unlock. After the push member 2 rotates, the torsion spring 17 drives the pawl 6.1 to lock the output disk 3 again.

[0077] The frame 5 is equipped with an operating device 7;

[0078] The operating device 7 includes a first input shaft 7.1 and a second input shaft 7.2 for driving the pusher 2.

[0079] The first input shaft 7.1 and the second input shaft 7.2 are respectively connected to the pusher 2 for transmission.

[0080] The dual-input axis design allows operators to control the spindle assembly 1 to switch the guillotine knife between different positions as needed, making operation more flexible and convenient. The first input axis 7.1 and the second input axis 7.2 correspond to different position switching paths, avoiding the possibility of misoperation and improving operational safety. By driving the pusher 2 through the two independent input axes, the pusher 2 can indirectly trigger the spindle assembly 1 to switch the guillotine knife to the corresponding position.

[0081] The operating device 7 includes a first gear 7.3 coaxially connected to the first input shaft 7.1 and a second gear 7.4 coaxially connected to the second input shaft 7.2; the frame 5 is provided with a transmission gear 8 coaxially connected to the pusher 2, and the first gear 7.3 and the second gear 7.4 respectively mesh with the transmission gear 8;

[0082] When the first input shaft 7.1 rotates, it drives the pusher 2 to rotate through the first gear 7.3 and the transmission gear 8.

[0083] When the second input shaft 7.2 rotates, it drives the pusher 2 to rotate through the second gear 7.4 and the transmission gear 8.

[0084] The gear transmission system is designed to provide stable and reliable power transmission, ensuring that the power input of the operating device 7 is accurately converted into the rotation of the pusher 2, thus improving the transmission efficiency and operational precision of the mechanism. The meshing of the first gear 7.3, the second gear 7.4, and the transmission gear 8 allows the two input shafts to drive the pusher 2 independently without interference. The gear transmission has excellent self-locking properties, maintaining the position of the pusher 2 after operation and preventing accidental rotation due to external forces, thereby improving the safety and stability of the mechanism. Furthermore, the gear transmission system has a compact structure and occupies little space, which is beneficial for the miniaturization design of the switchgear.

[0085] The frame 5 includes a first mounting plate 9 and a second mounting plate 10;

[0086] An installation space 11 for mounting the output disk 3 and the pawl locking assembly 6 is formed between the first mounting plate 9 and the second mounting plate 10. The pusher 2 is coaxially arranged with the output disk 3. The pusher 2, the first input shaft 7.1 and the second input shaft 7.2 are respectively rotatably connected to the first mounting plate 9 and located on the outside of the installation space 11.

[0087] The output disk 3 and the pawl locking assembly 6 are respectively rotatably connected to the second mounting plate 10.

[0088] The mounting space 11 formed by the first mounting plate 9 and the second mounting plate 10 provides a stable mounting foundation for the output disc 3 and the pawl locking assembly 6, ensuring that these key components maintain the correct positional relationship during operation and improving the overall stability of the mechanism. The design of the pusher 2, the first input shaft 7.1, and the second input shaft 7.2 located outside the mounting space 11, and the rational use of the layout of the two mounting plates, ensures that the pusher 2, the output disc 3, and the pawl locking assembly 6 do not interfere with each other, reducing installation difficulty. The coaxial arrangement of the pusher 2 and the output disc 3 makes power transmission more direct and efficient, reducing energy loss and transmission errors, and improving the working efficiency and accuracy of the mechanism.

[0089] The pusher 2 is provided with a connecting shaft 12 that is rotatably connected to the first mounting plate 9. The pusher 2, the connecting shaft 12, and the torsion spring 4 are fixedly connected. The first section of the torsion spring 4 is fixedly connected to the connecting shaft 12. The connecting shaft 12 is provided with a square hole 12.1 for inserting the torsion spring 4.

[0090] The main spindle assembly 1 includes a connecting arm 13 connected to the guillotine and a main spindle 14 fixedly connected to the connecting arm 13. The connecting shaft 12 is coaxially arranged with the main spindle 14, and the main spindle 14 is fixedly connected to the output disk 3. A torsion spring 4 is inserted into the main spindle 14. The main spindle 14 has a hollow part with the torsion spring 4 built in, and the main spindle 14 is provided with a fastener 15 for fixing the tail section of the torsion spring 4.

[0091] The output disk 3 is located at the rear of the pusher 2, and the front section of the main shaft 14 is fixedly connected to the output disk 3. The rear section of the main shaft 14 extends axially along the rear of the output disk 3 and is fixedly connected to the tail section of the torsion bar spring 4, so that the tail section of the torsion bar spring 4 is fixedly connected to the main shaft 14 and the output disk 3 by fastener 15.

[0092] The front section of the main shaft 14 passes through the second mounting plate 10 and is coaxially arranged with the connecting shaft 12 of the pusher 2, so that the output disk 3 is rotatably mounted on the frame 5, and the first section of the torsion bar spring 4 passes through the main shaft 14 and is inserted into the square hole 12.1 of the connecting shaft 12;

[0093] In this embodiment, the mounting plate of the frame 5 is provided with a bushing, and both the connecting shaft 12 and the main shaft 14 are inserted into the bushing, which is equivalent to the connecting shaft 12 and the main shaft 14 being rotatably connected to the bushing respectively, and the connecting shaft 12 and the main shaft 14 are coaxially arranged.

[0094] The second mounting plate 10 is equipped with a torsion spring 17 and a limiting post 16 for each pawl. One end of the torsion spring 17 elastically abuts against the corresponding pawl, and the other end of the torsion spring 17 elastically abuts against the corresponding limiting post 16, so that each pawl can elastically rotate on the frame 5. One end of the limiting post 16 is fixed to the second mounting plate 10 by thread or welding.

[0095] In this technical solution, the main shaft 14 has a square or hexagonal structure, and the output disk 3 is provided with a square or hexagonal shaft hole. The main shaft 14 passes through the frame 5 and is inserted into the shaft hole of the output disk 3 so that the main shaft 14 and the output disk 3 rotate synchronously. The connecting shaft 12 is provided with a circular slot or circular bushing for inserting the main shaft 14, so the main shaft 14 does not rotate when the pusher 2 rotates.

[0096] The design of the square hole 12.1 and the torsion spring 4 ensures that the rotation of the pusher 2 is reliably converted into the elastic deformation of the torsion spring 4. The torsion spring 4 can rotate with the pusher 2, improving power transmission efficiency. The torsion spring 4 has a high elastic modulus and fatigue strength, maintaining good elastic performance during frequent torsion and extending the service life of the mechanism. The fastener 15 ensures a reliable connection between the torsion spring 4 and the main shaft 14, preventing loosening or separation during operation. The torsion release elasticity of the torsion spring 4 drives the main shaft 14 to rotate synchronously with the output disk 3, improving the operational reliability of the mechanism. The structural design of the main shaft 14 inserting into the second mounting plate 10 provides stable rotational support for the output disk 3, reducing swaying and vibration during rotation and improving the operating accuracy of the mechanism. In addition, the energy storage characteristics of the torsion spring 4 enable the main shaft assembly 1 to obtain sufficient power during the switching of the guillotine, achieving a fast and smooth state transition. The main shaft 14 is rotatably connected to the connecting shaft 12, and the main shaft 14 and the connecting shaft 12 rotate relative to each other so that they can rotate independently. When the main shaft 14 drives the output disk 3 to rotate, the main shaft 14 rotates within the rotating shaft 12.

[0097] The four pawls positioned at the four corners, in conjunction with the torsion spring 17 and the limiting post 16, form a flexible and reliable locking mechanism. This mechanism automatically selects the appropriate pawl combination to lock the output panel 3 based on the switch's position, ensuring stable positioning of the output panel 3 in all operating states. The elasticity of the torsion spring 17 ensures that the pawls maintain close contact with the output panel 3, providing reliable locking force. This locking structure design keeps the output panel 3 in a stable operating state, significantly improving the safety and reliability of the switchgear.

[0098] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A three-station mechanism drive assembly comprising a frame (5), characterized in that, The frame (5) is equipped with: Output disk (3), which is rotatably connected to frame (5); A pawl locking assembly (6) is used to constrain the rotation of the output disk (3); Pusher (2), which is rotatably connected to the frame (5) and used to drive the pawl locking assembly (6) to unlock the output disk (3); The main spindle assembly (1) is used to connect with the guillotine drive. The main spindle assembly (1) is provided with a torsion spring (4). The pusher (2) is fixedly connected to the torsion spring (4). The main spindle assembly (1), the output disk (3), and the torsion spring (4) are fixedly connected. The main spindle assembly (1) is provided with a hollow part for housing the torsion spring (4). In the initial state, the pawl locking assembly (6) is locked to the output disk (3). When the pusher (2) rotates, the first segment of the torsion bar spring (4) rotates with the pusher (2). The tail segment of the torsion bar spring (4) does not rotate when the output disk (3) is locked, so that the torsion bar spring (4) can achieve elastic deformation and store energy. When the pusher (2) rotates to unlock the pawl locking assembly (6) and the output disk (3), the torsion bar spring (4) releases elastic potential energy. The tail segment of the torsion bar spring (4) drives the output disk (3) and the spindle assembly (1) to rotate until the pawl locking assembly (6) and the output disk (3) are locked again, so that the spindle assembly (1) drives the guillotine to switch between the connected position, the isolated position and the grounded position in sequence.

2. The three-station mechanism drive assembly according to claim 1, characterized in that, include: The stop assembly is used to constrain the rotation of the output disk (3) when the switch is switched to the on position or the ground position. The stop assembly and the pawl locking assembly (6) constrain the output disk (3) from the forward and reverse rotation directions of the output disk (3) respectively.

3. The three-station mechanism drive assembly according to claim 2, characterized in that: The stop assembly includes a stop (3.2) disposed on the output disk (3) and a stop (6.3) disposed on the frame (5). When the switch is in the ON position, the first end of the stop block (3.2) abuts against the stop (6.3); When the switch is in the grounding position, the second end of the stop block (3.2) abuts against the stop (6.3); The stop block (3.2) is arc-shaped and is located at the rear of the output disk (3). The two ends of the stop block (3.2) are respectively provided with arc-shaped recesses that cooperate with the stop (6.3); the outer surface of the stop (6.3) is provided with an arc surface for abutting against the arc-shaped recesses.

4. The three-station mechanism drive assembly according to claim 1, characterized in that: The output disk (3) has a single arc-shaped protrusion (3.1) on its side. The pawl locking assembly (6) includes a first pawl (6.11), a second pawl (6.12), a third pawl (6.13) and a fourth pawl (6.14) arranged in clockwise order, and each pawl is provided with an arc-shaped surface that mates with the arc-shaped protrusion (3.1); When the guillotine is in the ON position, the first end of the arc-shaped protrusion (3.1) abuts against the first pawl (6.11); When the guillotine is in the isolated position, the first end of the arc-shaped protrusion (3.1) abuts against the fourth pawl (6.14), and the second end of the arc-shaped protrusion (3.1) abuts against the third pawl (6.13); When the switch is in the grounding position, the second end of the arc-shaped protrusion (3.1) abuts against the second pawl (6.12).

5. The three-station mechanism drive assembly according to claim 1, characterized in that: The pusher (2) has a single push boss (2.1) on its side. When the pusher (2) rotates, the push boss (2.1) drives the pawl locking assembly (6) to rotate, thereby unlocking the pawl locking assembly (6) from the output disk (3).

6. The three-station mechanism drive assembly according to claim 5, characterized in that: The pawl locking assembly (6) includes four pawls (6.1) elastically rotatably disposed around the output disk (3). The four pawls (6.1) are arranged circumferentially at intervals, and each pawl (6.1) is provided with a push post (6.2). When the pusher (2) rotates, it engages with one of the pawls (6.1). The push column (6.2) of 6.1) contacts and drives the pawl (6.1) to rotate and disengage from the output disk (3). The frame (5) is provided with a torsion spring (17) for driving the pawl (6.1) to move in the direction of locking the output disk (3).

7. The three-station mechanism drive assembly according to claim 1, characterized in that: The frame (5) is equipped with an operating device (7); The operating device (7) includes a first input shaft (7.1) and a second input shaft (7.2) for driving the pusher (2) to operate. The first input shaft (7.1) and the second input shaft (7.2) are respectively connected to the pusher (2) for transmission.

8. The three-station mechanism drive assembly according to claim 7, characterized in that: The operating device (7) includes a first gear (7.3) coaxially connected to the first input shaft (7.1) and a second gear (7.4) coaxially connected to the second input shaft (7.2); the frame (5) is provided with a transmission gear (8) coaxially connected to the pusher (2), and the first gear (7.3) and the second gear (7.4) mesh with the transmission gear (8) respectively; When the first input shaft (7.1) rotates, it drives the pusher (2) to rotate through the first gear (7.3) and the transmission gear (8); When the second input shaft (7.2) rotates, it drives the pusher (2) to rotate through the second gear (7.4) and the transmission gear (8).

9. The three-station mechanism drive assembly according to claim 7, characterized in that: The frame (5) includes a first mounting plate (9) and a second mounting plate (10); An installation space (11) for mounting the output disk (3) and the pawl locking assembly (6) is formed between the first mounting plate (9) and the second mounting plate (10). The pusher (2) is coaxially arranged with the output disk (3). The pusher (2), the first input shaft (7.1) and the second input shaft (7.2) are rotatably connected to the first mounting plate (9) and located on the outside of the installation space (11). The output disk (3) and the pawl locking assembly (6) are respectively rotatably connected to the second mounting plate (10).

10. The three-station mechanism drive assembly according to claim 9, characterized in that: The pusher (2) is provided with a connecting shaft (12) that is rotatably connected to the first mounting plate (9). The pusher (2), the connecting shaft (12), and the torsion spring (4) are fixedly connected. The first section of the torsion spring (4) is fixedly connected to the connecting shaft (12). The connecting shaft (12) is provided with a square hole (12.1) for inserting the torsion spring (4). The main shaft assembly (1) includes a connecting arm (13) connected to the guillotine and a main shaft (14) fixedly connected to the connecting arm (13). The connecting shaft (12) is coaxially arranged with the main shaft (14), and the main shaft (14) is fixedly connected to the output disk (3). A torsion bar spring (4) is inserted into the main shaft (14). The main shaft (14) has a hollow part with a built-in torsion bar spring (4), and the main shaft (14) is provided with a fastener (15) for fixing the tail section of the torsion bar spring (4). The output disk (3) is located at the rear of the pusher (2), and the front section of the main shaft (14) is fixedly connected to the output disk (3). The rear section of the main shaft (14) extends axially along the rear of the output disk (3) and is fixedly connected to the tail section of the torsion bar spring (4), so that the tail section of the torsion bar spring (4) is fixedly connected to the main shaft (14) and the output disk (3) by fasteners (15). The front section of the main shaft (14) passes through the second mounting plate (10) and is coaxially arranged with the connecting shaft (12) of the pusher (2) so that the output disk (3) is rotatably mounted on the frame (5), and the first section of the torsion bar spring (4) passes through the main shaft (14) and is inserted into the square hole (12.1) of the connecting shaft (12). The second mounting plate (10) is provided with a torsion spring (17) and a limiting post (16) for each pawl. One end of the torsion spring (17) elastically abuts against the corresponding pawl, and the other end of the torsion spring (17) elastically abuts against the corresponding limiting post (16), so that each pawl can elastically rotate on the frame (5).

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