Rapid closing mechanism of miniature circuit breaker
By designing a fast closing mechanism in a small circuit breaker, the elastic accumulator of the torsion spring drives the rotating block to rotate quickly, and the rapid contact and closing of dynamic and static contacts is achieved, which solves the arc caused by the slow closing speed of traditional small circuit breakers Long duration and noise issues extend the service life of the device and improve the user experience.
Patent Information
- Application Number
- CN202323621097.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The closing speed of traditional small circuit breakers is too slow, causing the arc of dynamic and static contacts to last for a long time, causing welding or ablation, increasing contact spacing, increasing overvoltage and mismoving the relay, affecting the normal operation and service life of the equipment.
A quick closing mechanism is designed, including a closing handle, a rotating sleeve, a rotating block, a torsion spring and a limiting block. The rotating block is driven to rotate quickly through the elastic accumulation of the torsion spring, and the jumping buckle assembly is driven by the transmission arm to realize the Quick contact and closing of dynamic and static contacts.
It effectively reduces the duration of arc between dynamic and static contacts, avoids welding or ablation damage, extends service life, reduces closing noise, and improves user experience.
Smart Images
Figure CN222338211U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to safe electrical equipment, in particular to a fast closing mechanism of a small circuit breaker. Background Art
[0002] Miniature circuit breakers are mainly used to connect to power lines and detect circuit leakage, overload, short circuit, etc. When the above problems are found, the tripping assembly will be controlled to separate the moving and static contacts, thereby disconnecting the circuit and ensuring power safety. After troubleshooting and completing the circuit maintenance, it is necessary to control the miniature circuit breaker to close the circuit to connect it.
[0003] The closing structure of a traditional small circuit breaker mainly includes a closing handle, and the closing handle is connected to the tripping assembly through a transmission arm. By pulling the closing handle, the tripping assembly is driven by the transmission arm, which in turn drives the moving contact seat to swing, thereby achieving contact closing between the moving and static contacts. The defects of this structure are: in actual use, if the closing handle is pulled too slowly, it will directly lead to a slower closing speed of the circuit breaker, which will in turn cause the arc duration between the moving and static contacts to become longer, causing damage such as welding or ablation to the contacts, resulting in a larger contact spacing, increased overvoltage and relay malfunction, and in severe cases, it will cause electrical equipment to fail to work normally. In addition, it will also cause problems such as accelerated aging of the product and increased closing noise, resulting in a poor user experience. Utility Model Content
[0004] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a quick closing mechanism of a miniature circuit breaker for solving the above-mentioned problem.
[0005] To this end, the utility model is implemented by adopting the following scheme:
[0006] A quick closing mechanism for a small circuit breaker comprises a closing handle, characterized in that a rotating sleeve is extendedly provided at one end of the closing handle, a rotating block is provided in the rotating sleeve, the rotating block is connected to a torsion spring, one leg of the torsion spring is pressed tightly on the rotating sleeve, the rotating block is eccentrically connected to one end of a transmission arm, the other end of the transmission arm is connected to a tripping assembly, a first transmission groove is provided at one end of the rotating sleeve, a transmission part is extendedly provided on the rotating block, the transmission part is located in the first transmission groove and partially extends out of the first transmission groove, a corresponding transmission part has a movably provided limit block, the transmission part can be abutted against the limit block, and an elastic member is pressed tightly on one side of the limit block.
[0007] The rotating block forms an outer convex portion at the connection end with the transmission arm, and the rotating sleeve is provided with a clearance groove at a position corresponding to the outer convex portion, and the length of the clearance groove corresponds to the first transmission groove.
[0008] One end of the limit block is hinged in the circuit breaker housing.
[0009] One end of the limit block is extended to form a limit stop hook, the transmission part can be against the limit stop hook, and the limit block forms an arc portion on one side of the limit stop hook.
[0010] The rotating sleeve is provided with a second transmission groove for the support leg of the torsion spring to be clamped into.
[0011] The quick closing mechanism of the small circuit breaker of the above technical solution, by co-arranging a rotating sleeve, a rotating block, a torsion spring and a limit block, can elastically store force on the rotating block through the torsion spring during the rotation of the rotating sleeve. When the rotating block disengages from the limit block, the torsion spring will drive the rotating block to rotate rapidly, and quickly transmit the power through the transmission arm, thereby driving the tripping assembly to move, thereby realizing quick contact and closing of the moving and static contacts, which can effectively reduce the arc duration between the moving and static contacts, avoid damage to the contacts such as welding or ablation, and also slow down the aging of the product, increase its service life, and reduce the noise during its closing, thereby improving its user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The utility model has the following drawings:
[0013] Figure 1 This is a structural diagram of the utility model disposed in a small circuit breaker;
[0014] Figure 2 for Figure 1 A partial enlarged view of the area pointed by A in the middle;
[0015] Figure 3 This is a structural diagram of the rotating sleeve of the utility model;
[0016] Figure 4 It is a structural diagram of the rotating block and the torsion spring of the utility model. DETAILED DESCRIPTION
[0017] As shown in the figure, the quick closing mechanism of the small circuit breaker disclosed by the utility model comprises a closing handle 1, a rotating sleeve 2 is extendedly provided at one end of the closing handle, a rotating block 3 is provided in the rotating sleeve 2, the rotating block 3 is connected to the torsion spring 15, a leg 14 of the torsion spring 15 is pressed tightly on the rotating sleeve 2, the rotating block 3 is eccentrically connected to one end of the transmission arm 4, the other end of the transmission arm 4 is connected to the tripping assembly 16, a first transmission groove 7 is opened at one end of the rotating sleeve 2, a transmission part 8 is extendedly provided on the rotating block 3, the transmission part 8 is located in the first transmission groove 7 and partially extends out of the first transmission groove 7, and the corresponding transmission part 8 has a movable limit block 10, one end of the limit block 10 is hinged in the circuit breaker housing. The transmission part 8 can be against the limit block 10, and an elastic member 9 is pressed tightly on one side of the limit block 10. The rotating block 3 forms an outer protrusion 6 at the connection end with the transmission arm 4, and the rotating sleeve 2 is provided with a clearance groove 5 at the position corresponding to the outer protrusion 6. The length of the clearance groove 5 corresponds to the first transmission groove 7 to provide clearance, and the outer protrusion 6 and the clearance groove 5 can also realize the transmission between the rotating sleeve 2 and the rotating block 3, so that the overall force between the rotating sleeve 2 and the rotating block 3 is more balanced, and the stability during use is improved. One end of the limit block 10 extends to form a limit stop hook 12, and the transmission part 8 can be against the limit stop hook 12. The limit block 10 forms an arc portion 11 on one side of the limit stop hook 12 to facilitate the limit between the transmission part 8 and the limit block 10. The rotating sleeve 2 is provided with a second transmission groove 13 for the support leg 14 of the torsion spring 15 to be inserted, which is convenient for the placement and transmission of the support leg 14.
[0018] The working principle of the utility model is as follows: when it is necessary to close the circuit breaker, the closing handle 1 can be pulled to drive the rotating sleeve 2 to rotate. During the rotation of the rotating sleeve 2, the side wall of the first transmission groove 7 will squeeze the transmission part 8 and drive the rotating block 3 to rotate. When the rotating block 3 rotates to a certain angle, the transmission part 8 will abut against the limit stop hook 12 of the limit block 10, thereby realizing the positioning of the rotating block 3. After that, the closing handle 1 is continued to be pulled to drive the rotating sleeve 2 to rotate, and the torsion spring 15 will be squeezed through the support foot 14 to realize the elastic force storage of the torsion spring 15. As the elastic force accumulated in the torsion spring 15 becomes larger and larger, the rotational force applied to the rotating block 3 also gradually increases. When the rotational force on the rotating block 3 increases to a certain extent, its transmission part 8 will squeeze the limit block 10 to swing, and squeeze the elastic member 9. Then the transmission block 8 will separate from the limit block 10, and the transmission block 8 will lose the limit of the limit block 10. The torsion spring 15 will drive the rotating block 3 to rotate rapidly, and transmit it through the transmission arm 4, driving the tripping assembly to move, and then driving the moving contact seat to swing, so that the moving and static contacts quickly contact and close.
[0019] The structure of the utility model, by co-arranging a rotating sleeve, a rotating block, a torsion spring and a limit block, can elastically store force on the rotating block through the torsion spring during the rotation of the rotating sleeve. When the rotating block disengages from the limit block, the torsion spring will drive the rotating block to rotate rapidly, and quickly transmit the power through the transmission arm, thereby driving the tripping assembly to move, thereby realizing rapid contact and closing of the moving and static contacts, which can effectively reduce the duration of the arc between the moving and static contacts, avoid damage to the contacts such as welding or ablation, and also slow down the aging of the product, increase its service life, and reduce the noise when it is closed, thereby improving its user experience.
Claims
1. A quick closing mechanism for a miniature circuit breaker, comprising a closing handle (1), characterized in that A rotating sleeve (2) is extendedly provided at one end of the closing handle, a rotating block (3) is provided inside the rotating sleeve (2), the rotating block (3) is connected to a torsion spring (15), a leg (14) of the torsion spring (15) is pressed against the rotating sleeve (2), the rotating block (3) is eccentrically connected to one end of a transmission arm (4), the other end of the transmission arm (4) is connected to a tripping assembly (16), a first transmission groove (7) is provided at one end of the rotating sleeve (2), a transmission part (8) is extendedly provided on the rotating block (3), the transmission part (8) is located in the first transmission groove (7) and partially extends out of the first transmission groove (7), a limit block (10) is movably provided corresponding to the transmission part (8), the transmission part (8) can abut against the limit block (10), and an elastic member (9) is pressed against one side of the limit block (10).
2. The quick closing mechanism of the miniature circuit breaker according to claim 1 is characterized in that The rotating block (3) forms an outer convex portion (6) at the connection end with the transmission arm (4), and the rotating sleeve (2) is provided with a clearance groove (5) at a position corresponding to the outer convex portion (6), and the length of the clearance groove (5) corresponds to the first transmission groove (7).
3. The quick closing mechanism of the miniature circuit breaker according to claim 1 is characterized in that One end of the limit block (10) is hinged in the circuit breaker housing.
4. The quick closing mechanism of a miniature circuit breaker according to claim 1 is characterized in that One end of the limit block (10) extends to form a limit stop hook (12), the transmission part (8) can abut against the limit stop hook (12), and the limit block (10) forms an arc portion (11) on one side of the limit stop hook (12).
5. The quick closing mechanism of a miniature circuit breaker according to claim 1, characterized in that The rotating sleeve (2) is provided with a second transmission groove (13) for the support leg (14) of the torsion spring (15) to be inserted into.