A combine delay mechanism
By designing a closing and opening delay mechanism, the problems of unadjustable and unstable metal short-circuit time in auxiliary switch control are solved, achieving adjustable and stable delay time, and improving the operational reliability and lifespan of the circuit breaker.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENYANG LONGDI ELECTRICAL APPLIANCE EQUIP
- Filing Date
- 2026-05-21
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, the delay time of the auxiliary switch control for metal short-circuit is not adjustable, has a small adjustment range, and is unstable.
The combined delay mechanism includes a base, mounting plate, delay impact block module, copper delay dial module, and delay drive shaft module. It achieves stable provision of delay signal by storing energy with coil spring and resetting with reset torsion spring, in conjunction with delay drive shaft, magnetic blow micro switch and delay impact block module, and can be precisely adjusted by adjusting the initial energy storage angle of coil spring.
It achieves adjustable and stable delay time, improves the lifespan and ease of operation of the mechanism, and meets the metal short-circuit time requirements of high-voltage circuit breakers.
Smart Images
Figure CN122393152A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of circuit breaker operating mechanisms, and specifically relates to a closing / opening delay mechanism. Background Technology
[0002] In power systems, to meet the requirements of reclosing operations, precise control of the time from the closure of the circuit breaker contacts to the separation of the second contact is necessary; this is known as the "metal short-circuit time." Currently, the State Grid generally requires that the metal short-circuit time of high-voltage circuit breakers be reliably achieved by the circuit breaker itself, with a recommended time of 50ms. Existing solutions typically use auxiliary switching components for control, such as closing a pair of delayed contacts after the auxiliary switch has rotated 95°. However, this auxiliary switch control method suffers from problems such as the delay time being non-adjustable, having a small adjustment range, and being unstable. Summary of the Invention
[0003] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a combination and separation delay mechanism. This invention can solve the problems of unadjustable and unstable delay time in the auxiliary switch control of metal short-circuit time in existing technologies.
[0004] To achieve the above objectives, the present invention adopts the following technical solution.
[0005] This invention provides a merging and splitting delay mechanism, characterized in that it includes a base, a mounting plate, a delay impact block module, a copper delay lever module, and a delay transmission shaft module. The mounting plate is fixed on the base. The delay transmission shaft module includes a delay transmission shaft, which is rotatably mounted on the base. One end of the delay transmission shaft is connected to a coil spring, and the other end is connected to a reset lever. The copper delay lever module includes a copper delay lever, and the reset lever engages with the copper delay lever. The delay impact block module includes a delay impact block, which can contact the copper delay lever to drive the copper delay lever to disengage from the reset lever. The outer circumferential surface of the delay transmission shaft is provided with a flat end face and an arc surface. A magnetic blow-out micro switch is fixed on the base by a sixth screw, and the guide wheel of the magnetic blow-out micro switch contacts the flat end face or the arc surface.
[0006] Furthermore, a first graphite bushing is provided on the base, and one end of the time-delay transmission shaft is inserted into the first graphite bushing for rotation.
[0007] Furthermore, the other end of the delay drive shaft is connected to the reset block via a second fixing nut.
[0008] Furthermore, a coil spring positioning groove is provided on the time-delay transmission shaft, and one end of the coil spring is fixed in the coil spring positioning groove by a first retaining ring.
[0009] Furthermore, it also includes a spring bushing, which is sleeved on the outside of the coil spring. The spring bushing is fitted with an indicator plate, a fixing washer, and a pointer. The pointer is locked by a first fixing nut, and the indicator plate is fixed to the base by a first screw. The spring bushing can drive the coil spring to store energy by rotation, and the delay time can be adjusted by adjusting the rotation angle of the spring bushing.
[0010] Furthermore, a buffer boss is provided on the time-delay drive shaft, and a buffer rod is provided in the buffer hole of the base, and the buffer boss can contact the buffer rod.
[0011] Furthermore, the time-delayed impact block module also includes a connecting rod and a ball bearing. One end of the connecting rod is connected to the time-delayed impact block through the ball bearing, a washer, an internal hexagonal guide hole screw, and a fourth screw. The other end of the connecting rod is connected to the crank arm through a pin and a first shaft retaining ring. A third graphite bushing is provided in the time-delayed impact block. The time-delayed impact block is fixed to a positioning plate by a third snap ring. The positioning plate is fixed to the rear end of the base by a second screw.
[0012] Furthermore, the crank arm is provided with a spline hole, which is used to fit and fix it on the output spline shaft of the external output mechanism, so that the crank arm and the output spline shaft form a spline transmission connection. When the crank arm rotates, it drives the delay impact block to move through the connecting rod. The delay impact block is used to push the copper delay dial to disengage from the reset dial.
[0013] Furthermore, the copper delay block module also includes a torsion spring reset pin, a reset torsion spring, and a second shaft retaining ring. Second graphite bushings are provided on both sides of the mounting hole of the copper delay block. The torsion spring reset pin is fixed to the copper delay block via the second shaft retaining ring. The reset torsion spring is sleeved on the reset pin shaft. One end of the reset torsion spring is installed in the first reset hole of the mounting plate, and the other end is installed in the second reset hole of the torsion spring reset pin. The copper delay block module is fixed to the reset pin shaft via a second fixing washer and a second retaining spring. The reset torsion spring is used to drive the copper delay block to re-engage with the reset block.
[0014] The beneficial effects of the present invention.
[0015] This invention achieves energy storage release and reliable reset of the time-delay opening / closing mechanism through the cooperation of a coil spring for energy storage and a reset torsion spring for reset. The stable supply of the delay signal is achieved through the ingenious coordination of the time-delay drive shaft module, the magnetic blow microswitch, the time-delay impact block module, and the copper time-delay toggle block module. A flat end face and an arc surface are provided on the time-delay drive shaft to switch the microswitch state, and a buffer boss cooperates with the buffer rod to effectively reduce impact force and improve the mechanism's lifespan and stability. Furthermore, the delay time can be precisely adjusted by adjusting the initial energy storage angle of the coil spring, offering a wide adjustment range and convenient operation. Attached Figure Description
[0016] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
[0017] Figure 1 This is a schematic diagram of the overall exploded structure of the present invention.
[0018] Figure 2 This is a schematic diagram of the external front view of the assembled structure of the present invention.
[0019] Figure 3 This is a schematic diagram of the external side view of the assembled structure of the present invention.
[0020] Figure 4 This is a schematic diagram of the delayed impact block module in this invention.
[0021] Figure 5 This is an exploded structural diagram of the copper delay block module in this invention.
[0022] Figure 6 This is a schematic diagram of the magnetic blow-out micro switch in this invention.
[0023] Figure 7 This is an exploded structural diagram of the time-delay drive shaft module in this invention.
[0024] Figure 8 This is a schematic diagram of the coil spring in the starting position in this invention.
[0025] Figure 9 This is a schematic diagram of the coil spring located at the energy storage position in this invention.
[0026] Figure 10 This is a schematic diagram of the structure in which the copper delay block and the reset block are in an engaged state in this invention.
[0027] Figure 11 This is a schematic diagram of the copper delay switch and reset switch in the disengaged state in this invention.
[0028] In the diagram, the markings are as follows: 1 is the first fixing nut, 2 is the fixing washer, 3 is the pointer, 4 is the first screw, 5 is the indicator plate, 6 is the spring bushing, 7 is the first snap ring, 8 is the coil spring, 9 is the second screw, 10 is the sixth screw, 11 is the base, 12 is the first graphite bushing, 13 is the buffer rod, 14 is the second snap ring, 15 is the positioning pin, 16 is the time-delay drive shaft, 17 is the positioning plate, 18 is the reset torsion spring, 19 is the reset pin, 20 is the second fixing washer, 21 is the third snap ring, 22 is the reset lever, 23 is the third fixing washer, 24 is the second fixing nut, 25 is the pin, 26 is the crank arm, 27 is the first shaft retaining ring, 28 is the second fixing nut, 25 is the pin, 26 is the crank arm, 27 is the first shaft retaining ring, 28 is the second screw, 29 is the second screw, 20 is the second fixing washer, 21 is the third snap ring, 22 is the reset lever, 23 is the third fixing washer, 24 is the second fixing nut, 25 is the pin, 26 is the crank arm, 27 is the first shaft retaining ring, 28 is the second screw, 29 is the second screw, 20 is the second screw, 21 is the third screw, 22 is the second screw, 23 is the third screw, 24 is the second fixing nut, 25 is the first pin, 26 is the second crank arm, 27 is the first shaft retaining ring, 28 is the second screw, 29 is the second screw, 20 is the second screw, 21 is the third screw, 22 is the second screw, 23 is the third screw, 24 is the second fixing nut, 5 screws, 29 mounting plate, 30 magnetic blow micro switch, 31 guide wheel, 32 time-delay impact block, 33 third graphite bushing, 34 connecting rod, 35 ball bearing, 36 washer, 37 internal hexagon guide hole screw, 38 fourth screw, 39 copper time-delay block, 40 second graphite bushing, 41 torsion spring reset pin, 42 second shaft retaining ring, 43 coil spring positioning groove, 44 flat end face, 45 arc surface, 46 buffer boss, 47 first reset hole, 48 second reset hole, 49 spline hole, 50 time-delay impact block module, 51 copper time-delay block module, 52 time-delay transmission shaft module. Detailed Implementation
[0029] As shown in the accompanying drawings, this embodiment provides a combination and separation delay mechanism, including a base 11, a mounting plate 29, a delay impact block module 50, a copper delay pusher module 51, and a delay transmission shaft module 52. The mounting plate 29 is fixed on the base 11.
[0030] The time-delay drive shaft module 52 includes a time-delay drive shaft 16, which is rotatably mounted on a base 11. Specifically, a first graphite bushing 12 is provided on the base 11, and one end of the time-delay drive shaft 16 is inserted into the first graphite bushing 12 for rotation. A coil spring 8 is connected to one end of the time-delay drive shaft 16, and a coil spring positioning groove 43 is provided on the time-delay drive shaft 16. One end of the coil spring 8 is fixed in the coil spring positioning groove 43 by a first retaining ring 7. A reset lever 22 is connected to the other end of the time-delay drive shaft 16 by a second fixing nut 24.
[0031] The copper delay switch module 51 includes a copper delay switch 39, and a reset switch 22 engages with the copper delay switch 39.
[0032] The time-delay impact block module 50 includes a time-delay impact block 32, which can contact the copper time-delay dial 39 to drive the copper time-delay dial 39 to disengage from the reset dial 22.
[0033] The outer circumferential surface of the time-delay drive shaft 16 is provided with a flat end face 44 and an arc surface 45. A magnetic blow-out micro switch 30 is fixed on the base 11 by a sixth screw 10. The guide wheel 31 of the magnetic blow-out micro switch 30 is used to contact the flat end face 44 or the arc surface 45. When the guide wheel 31 contacts the flat end face 44, the magnetic blow-out micro switch 30 is in the closed state; when the guide wheel 31 contacts the arc surface 45, the magnetic blow-out micro switch 30 is in the open state.
[0034] The delay mechanism also includes a spring sleeve 6, which is sleeved on the outside of the coil spring 8. An indicator plate 5, a fixing washer 2, and a pointer 3 are mounted on the spring sleeve 6. The pointer 3 is locked in place by a first fixing nut 1, and the indicator plate 5 is fixed to the base 11 by a first screw 4. The spring sleeve 6 can rotate to drive the coil spring 8 to store energy, and the delay time can be adjusted by adjusting the rotation angle of the spring sleeve 6.
[0035] The time-delay drive shaft 16 is also provided with a buffer boss 46, and a buffer rod 13 is provided in the buffer hole of the base 11. The buffer boss 46 can contact the buffer rod 13.
[0036] The time-delay impact block module 50 also includes a connecting rod 34 and a ball bearing 35. One end of the connecting rod 34 is connected to the time-delay impact block 32 via the ball bearing 35, a washer 36, an internal hexagonal guide screw 37, and a fourth screw 38. The other end of the connecting rod 34 is connected to the crank arm 26 via a pin 25 and a first shaft retaining ring 27. A third graphite bushing 33 is provided in the time-delay impact block 32, and the time-delay impact block 32 is fixed to the positioning plate 17 by a third retaining spring 21. The positioning plate 17 is fixed to the rear end of the base 11 by a second screw 9.
[0037] The crank arm 26 is provided with a spline hole 49, which is used to fit and fix it on the output spline shaft of the circuit breaker operating mechanism, so that the crank arm 26 and the output spline shaft form a spline drive connection. When the crank arm 26 rotates, it drives the time-delay impact block 32 to move through the connecting rod 34. The time-delay impact block 32 is used to push the copper time-delay lever 39 to disengage from the reset lever 22.
[0038] The copper delay block module 51 also includes a torsion spring reset pin 41, a reset torsion spring 18, and a second shaft retaining ring 42. Second graphite bushings 40 are provided on both sides of the mounting hole of the copper delay block 39. The torsion spring reset pin 41 is fixed to the copper delay block 39 by the second shaft retaining ring 42. The reset torsion spring 18 is sleeved on the reset pin shaft 19, with one end of the reset torsion spring 18 installed in the first reset hole 47 of the mounting plate 29 and the other end installed in the second reset hole 48 of the torsion spring reset pin 41. The copper delay block module 51 is fixed to the reset pin shaft 19 by a second fixing washer 20 and a second retaining ring 14. The reset torsion spring 18 is used to drive the copper delay block 39 to re-engage with the reset block 22.
[0039] The workflow of this organization is as follows: During energy storage, the rotating spring bushing 6 stores energy in the coil spring 8. During the closing action, the output spline shaft of the circuit breaker operating mechanism drives the crank arm 26 to rotate via a spline transmission connection. The crank arm 26, through the connecting rod 34, drives the delay impact block 32 to push open the copper delay lever 39, disengaging it from the reset lever 22. The reset lever 22, through the second fixing nut 24, drives the delay transmission shaft 16 to rotate, causing its flat end face 44 to contact the micro switch guide wheel 31. The micro switch closes, providing a delay signal. During the opening action, the output spline shaft rotates in the reverse direction, and the crank arm 26 rotates in the reverse direction. Under the action of the reset torsion spring 18, the copper delay lever 39 re-engages with the reset lever 22, the delay transmission shaft 16 rotates in the reverse direction, and its arc surface 45 contacts the guide wheel 31. The micro switch opens, and the mechanism resets.
[0040] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.
Claims
1. A merging and splitting delay mechanism, characterized in that, The system includes a base (11), a mounting plate (29), a time-delay impact block module (50), a copper time-delay lever module (51), and a time-delay drive shaft module (52). The mounting plate (29) is fixed on the base (11). The time-delay drive shaft module (52) includes a time-delay drive shaft (16), which is rotatably mounted on the base (11). One end of the time-delay drive shaft (16) is connected to a coil spring (8), and the other end is connected to a reset lever (22). The copper time-delay lever module (51) includes a copper time-delay lever (39). The reset lever (39) is a copper time-delay lever module (50). 22) Engages with the copper delay block (39). The delay impact block module (50) includes a delay impact block (32). The delay impact block (32) can contact the copper delay block (39) to drive the copper delay block (39) to disengage from the reset block (22). The outer circumferential surface of the delay transmission shaft (16) is provided with a flat end face (44) and an arc surface (45). A magnetic blow micro switch (30) is fixed on the base (11) by a sixth screw (10). The guide wheel (31) of the magnetic blow micro switch (30) contacts the flat end face (44) or the arc surface (45).
2. The merging and splitting delay mechanism according to claim 1, characterized in that, A first graphite bushing (12) is provided on the base (11), and one end of the time-delay transmission shaft (16) is inserted into the first graphite bushing (12) for rotation.
3. The merging and splitting delay mechanism according to claim 1, characterized in that, The other end of the delay drive shaft (16) is connected to the reset block (22) via a second fixing nut (24).
4. The merging and splitting delay mechanism according to claim 1, characterized in that, The time-delay transmission shaft (16) is provided with a coil spring positioning groove (43), and one end of the coil spring (8) is fixed in the coil spring positioning groove (43) by a first snap ring (7).
5. The merging and splitting delay mechanism according to claim 1, characterized in that, It also includes a spring bushing (6), which is sleeved on the outside of the coil spring (8). The spring bushing (6) is fitted with an indicator plate (5), a fixing washer (2) and a pointer (3). The pointer (3) is locked by a first fixing nut (1). The indicator plate (5) is fixed on the base (11) by a first screw (4). The spring bushing (6) can drive the coil spring (8) to store energy by rotation, and the delay time can be adjusted by adjusting the rotation angle of the spring bushing (6).
6. The merging and splitting delay mechanism according to claim 1, characterized in that, The delay drive shaft (16) is also provided with a buffer boss (46), and a buffer rod (13) is provided in the buffer hole of the base (11). The buffer boss (46) can contact the buffer rod (13).
7. The merging and splitting delay mechanism according to claim 1, characterized in that, The delayed impact block module (50) also includes a connecting rod (34) and a ball bearing (35). One end of the connecting rod (34) is connected to the delayed impact block (32) through the ball bearing (35), a washer (36), an internal hexagonal guide screw (37), and a fourth screw (38). The other end of the connecting rod (34) is connected to the crank arm (26) through a pin (25) and a first shaft retaining ring (27). A third graphite bushing (33) is provided in the delayed impact block (32). The delayed impact block (32) is fixed on a positioning plate (17) by a third snap ring (21). The positioning plate (17) is fixed to the rear end of the base (11) by a second screw (9).
8. The merging and splitting delay mechanism according to claim 7, characterized in that, The crank arm (26) is provided with a spline hole (49), which is used to fit and fix on the output spline shaft of the external output mechanism so that the crank arm (26) and the output spline shaft form a spline transmission connection. When the crank arm (26) rotates, it drives the delay impact block (32) to move through the connecting rod (34). The delay impact block (32) is used to push the copper delay dial (39) to disengage from the reset dial (22).
9. A merging and splitting delay mechanism according to claim 1, characterized in that, The copper delay block module (51) also includes a torsion spring reset pin (41), a reset torsion spring (18), and a second shaft retaining ring (42). The copper delay block (39) has a second graphite bushing (40) on both sides of the mounting hole. The torsion spring reset pin (41) is fixed to the copper delay block (39) by the second shaft retaining ring (42). The reset torsion spring (18) is sleeved on the reset pin shaft (19). One end of the reset torsion spring (18) is installed in the first reset hole (47) of the mounting plate (29), and the other end is installed in the second reset hole (48) of the torsion spring reset pin (41). The copper delay block module (51) is fixed to the reset pin shaft (19) by the second fixing washer (20) and the second retaining ring (14). The reset torsion spring (18) is used to drive the copper delay block (39) and the reset block (22) to resume engagement.