Breaker with tripping controlled by microswitch and gear set
By replacing Hall sensors with micro switches in circuit breakers and optimizing layout through partition boards, the existing circuit breakers are solved with high cost and high number of parts, achieving lower cost and longer life products.
Patent Information
- Application Number
- CN202422135397.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing circuit breakers use Hall sensors to determine whether the gear is rotating in place, which has problems such as high cost and large number of parts.
Micro switches are used instead of Hall sensors, and the motor transmission part and the micro switch for inspection are separated through the partition board to optimize the layout to improve product life.
Reduces the cost of circuit breakers, extends service life, and improves product reliability and life.
Smart Images
Figure CN222980433U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuit breakers, and more specifically, it relates to a circuit breaker that uses a microswitch and a gear set to control tripping. Background Art
[0002] A circuit breaker refers to a switching device that can close, carry, and interrupt the current under normal circuit conditions, and can also close, carry, and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they encounter serious overload, short circuit, undervoltage and other faults, they can automatically cut off the circuit, and their functions are equivalent to the combination of fuse switches and over- and under-thermal relays, etc. Moreover, generally no parts need to be changed after breaking the fault current. Existing automatic circuit breakers all use Hall sensors to judge whether the gears rotate in place, which has the problems of high cost and a large number of parts. Summary of the Utility Model
[0003] Aiming at the deficiencies of the existing technology, the utility model provides a circuit breaker that uses a microswitch and a gear set to control tripping. By controlling the circuit breaker with a microswitch, the cost is reduced and it is more reliable.
[0004] The technical solution of the utility model is as follows:
[0005] A circuit breaker that uses a microswitch and a gear set to control tripping, which includes a housing. A handle is rotatably arranged on the housing. A partition board, a motor, a speed reduction mechanism, a first microswitch, and a second microswitch are arranged inside the housing. The handle, the motor, and the speed reduction mechanism are all located on the first side of the partition board. The motor is connected to the speed reduction mechanism, and the speed reduction mechanism is connected to the handle. The motor drives the handle to close or open through the speed reduction mechanism.
[0006] The partition board is provided with a connection hole. A dial block is arranged on the speed reduction mechanism. The dial block extends to the second side of the partition board through the connection hole. The first microswitch and the second microswitch are both arranged on the second side of the partition board. The contacts of the first microswitch and the second microswitch are located in the area of the connection hole.
[0007] When the motor drives the dial block to rotate through the speed reduction mechanism and triggers the contact of the first microswitch, the motor stops rotating, so that the handle rotates to complete closing.
[0008] When the motor drives the dial block to rotate through the speed reduction mechanism and triggers the contact of the second microswitch, the motor stops rotating, so that the handle rotates to complete opening.
[0009] The reduction mechanism includes a screw, a first shaft pin, a second shaft pin, a group of reduction teeth and a second group of reduction teeth. The first shaft pin and the second shaft pin are fixedly arranged on the housing, the screw is arranged on the motor, the group of reduction teeth is rotatably arranged on the first shaft pin and connected to the screw, the second group of reduction teeth is rotatably arranged on the second shaft pin and connected to the group of reduction teeth, the handle is connected to the second group of reduction teeth, and the shift block is arranged on the second group of reduction teeth.
[0010] In summary, the above technical solution has the following beneficial effects: the present application uses a micro switch to replace the original Hall sensor, which reduces the cost of the circuit breaker. In addition, the mechanical structure of the micro switch is longer in service life and more reliable than the Hall sensor. By setting a partition plate, the motor transmission part of the circuit breaker is set on the first side of the partition plate, and the micro switch for detection is set on the second side of the partition plate, so that the layout is more reasonable, the operation of each mechanism does not interfere with each other, and the life of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 A schematic diagram of a separator plate of a circuit breaker with a micro switch and a gear set controlling the tripping;
[0012] Figure 2 A schematic diagram of a handle of a circuit breaker with a micro switch and a gear set controlling the tripping;
[0013] Figure 3 A schematic diagram of a speed reduction mechanism of a circuit breaker controlled by a micro switch and a gear set for tripping;
[0014] Figure 4 The present invention is a schematic diagram of the second rear reduction gear of a circuit breaker whose tripping is controlled by a micro switch and a gear set.
[0015] : Illustration numerals: 10, housing; 20, handle; 30, partition plate; 31, connecting hole; 40, motor; 50, reduction mechanism; 51, screw; 52, first shaft pin; 53, second shaft pin; 54, one group of reduction teeth; 541, first front reduction teeth; 542, first rear reduction teeth; 55, two groups of reduction teeth; 551, second front reduction teeth; 552, second rear reduction teeth; 5521, full tooth end; 5522, missing tooth end; 60, first micro switch; 70, second micro switch; 80, dial block; 81, outer arc surface; 82, left dial surface; 83, inner arc surface; 84, right dial surface. DETAILED DESCRIPTION
[0016] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.
[0017] As Figures 1-4 shown, a circuit breaker controlled by a microswitch and a gear set to trip includes a housing 10, a handle 20 rotatably arranged on the housing 10, a partition plate 30, a motor 40, a reduction mechanism 50, a first microswitch 60 and a second microswitch 70 arranged inside the housing 10. The handle 20, the motor 40 and the reduction mechanism 50 are all located on the first side of the partition plate 30. The motor 40 is connected to the reduction mechanism 50, and the reduction mechanism 50 is connected to the handle 20. The motor 40 drives the handle 20 to close or open through the reduction mechanism 50. The partition plate 30 is provided with a connection hole 31. A dial block 80 is arranged on the reduction mechanism 50. The dial block 80 extends to the second side of the partition plate 30 through the connection hole 31. The first microswitch 60 and the second microswitch 70 are both arranged on the second side of the partition plate 30. The contacts of the first microswitch 60 and the second microswitch 70 are located in the area of the connection hole 31. When the motor 40 drives the dial block 80 to rotate through the reduction mechanism 50 and triggers the contact of the first microswitch 60, the motor 40 stops rotating, so that the handle 20 rotates to complete closing. When the motor 40 drives the dial block 80 to rotate through the reduction mechanism 50 and triggers the contact of the second microswitch 70, the motor 40 stops rotating, so that the handle 20 rotates to complete opening. The reduction mechanism 50 includes a screw 51, a first shaft pin 52, a second shaft pin 53, a first set of reduction gears 54 and a second set of reduction gears 55. The first shaft pin 52 and the second shaft pin 53 are fixedly arranged on the housing 10. The screw 51 is arranged on the motor 40. The first set of reduction gears 54 is rotatably arranged on the first shaft pin 52 and connected to the screw 51. The second set of reduction gears 55 is rotatably arranged on the second shaft pin 53 and connected to the first set of reduction gears 54. The handle 20 is connected to the second set of reduction gears 55. The dial block 80 is arranged on the second set of reduction gears 55. In this application, the microswitch is used to replace the original Hall sensor, which reduces the cost of the circuit breaker. In addition, the mechanical structure of the microswitch has a longer service life and is more reliable than the Hall sensor. By arranging the partition plate 30, the transmission part of the motor 40 of the circuit breaker is arranged on the first side of the partition plate 30, and the microswitch for detection is arranged on the second side of the partition plate 30, making the layout more reasonable and the operation of each mechanism not interfering with each other, thus improving the service life of the product.
[0018] The speed reduction mechanism 50 is driven sequentially by four reduction gears to complete speed reduction and can increase the torque. The four reduction gears are divided into two groups and stacked, which can reduce the occupied area of the reduction gears on the partition plate 30, make the speed reduction mechanism 50 more compact, reduce the space occupied by the speed reduction mechanism 50 to a certain extent, and make the spatial arrangement of the circuit breaker more reasonable.
[0019] One group of reduction teeth 54 includes a first front reduction tooth 541 and a first rear reduction tooth 542 rotatably arranged with the first pin 52. Two groups of reduction teeth 55 include a second front reduction tooth 551 and a second rear reduction tooth 552 rotatably arranged with the second pin 53. The shifting block 80 is arranged on the second rear reduction tooth 552; the screw 51 meshes with the first front reduction tooth 541, the first front reduction tooth 541 meshes with the second front reduction tooth 551, the second front reduction tooth 551 meshes with the first rear reduction tooth 542, the first rear reduction tooth 542 meshes with the second rear reduction tooth 552, and the second rear reduction tooth 552 is used to mesh with the handle 20 and drive the handle 20 to close or open. The first rear reduction tooth 542 is arranged closer to the partition plate 30 than the first front reduction tooth 541, the second rear reduction tooth 552 is arranged closer to the partition plate 30 than the second front reduction tooth 551, and one end of the handle 20 located inside the housing 10 has a tooth head that cooperates with the second rear reduction tooth 552.
[0020] The first front reduction tooth 541, the first rear reduction tooth 542, and the second front reduction tooth 551 all include a large tooth end and a small tooth end. The second rear reduction tooth 552 includes a full tooth end 5521 and a toothless end 5522; the screw 51 meshes with the large tooth end of the first front reduction tooth 541, the small tooth end of the first front reduction tooth 541 meshes with the large tooth end of the second front reduction tooth 551, the small tooth end of the second front reduction tooth 551 meshes with the large tooth end of the first rear reduction tooth 542, the small tooth end of the first rear reduction tooth 542 meshes with the full tooth end 5521 of the second rear reduction tooth 552, and the toothless end 5522 of the second rear reduction tooth 552 is used to mesh with the handle 20 and drive the handle 20 to close or open.
[0021] The full tooth end 5521 of the second rear reduction tooth 552 is a set of teeth that surrounds the arc wall for one week, and the toothless end 5522 is formed by extending some teeth of the full tooth end 5521. The full tooth end 5521 of the second rear reduction tooth 552 is used to mesh with the small tooth end of the first rear reduction tooth 542 to transmit power, and the toothless end 5522 is used to mesh with the tooth head on the handle 20. Since the handle 20 only needs to rotate a certain arc to close and open, the teeth of the toothless end 5522 of the second rear reduction tooth 552 do not need to cover the arc wall. Thus, the weight and manufacturing cost of the second rear reduction tooth 552 are reduced.
[0022] The central axis of the connecting hole 31 coincides with the central axis of the second rear reduction gear 552. The shifting block 80 includes an outer arc surface 81, a left shifting surface 82, an inner arc surface 83, and a right shifting surface 84 that are connected in sequence. The central axes of the outer arc surface 81 and the inner arc surface 83 both coincide with the central axis of the second rear reduction gear 552. The surfaces where the left shifting surface 82 and the right shifting surface 84 are located coincide with the central axis of the second rear reduction gear 552. The outer arc surface 81 is closer to the hole wall side of the connecting hole 31 than the inner arc surface 83, and the inner arc surface 83 is located on the side away from the hole wall of the connecting hole 31. The left shifting surface 82 and the right shifting surface 84 are respectively used to abut against the first microswitch 60 and the second microswitch 70; the surfaces where the left shifting surface 82 and the right shifting surface 84 are located coincide with the central axis of the second rear reduction gear 552, so that when the left shifting surface 82 and the right shifting surface 84 abut against the corresponding microswitches, the whole surface is used for abutting, thereby making the process of triggering the microswitch more reliable and avoiding malfunction.
[0023] The distance between the outer arc surface 81 and the inner arc surface 83 is less than the radius of the connecting hole 31 and greater than the length of the microswitch contact. Such a setting can make the widths of the left shifting surface 82 and the right shifting surface 84 greater than the length of the microswitch contact, thereby making it more reliable for the left shifting surface 82 and the right shifting surface 84 to shift the corresponding microswitches.
[0024] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. A circuit breaker with a micro switch and a gear set controlling the tripping, characterized in that: The invention comprises a housing (10), a handle (20) being rotatably arranged on the housing (10), a partition plate (30), a motor (40), a speed reduction mechanism (50), a first micro switch (60) and a second micro switch (70) being arranged in the housing (10), the handle (20), the motor (40) and the speed reduction mechanism (50) being all located on a first side of the partition plate (30), the motor (40) and the speed reduction mechanism (50) being connected, the speed reduction mechanism (50) and the handle (20) being connected, and the motor (40) drives the handle (20) to close or open the switch through the speed reduction mechanism (50); The partition plate (30) is provided with a connection hole (31), the speed reduction mechanism (50) is provided with a shifting block (80), the shifting block (80) extends to the second side of the partition plate (30) through the connection hole (31), the first micro switch (60) and the second micro switch (70) are both provided on the second side of the partition plate (30), and the contacts of the first micro switch (60) and the second micro switch (70) are located in the area of the connection hole (31); When the motor (40) drives the shift block (80) to rotate through the speed reduction mechanism (50) and triggers the contact of the first micro switch (60), the motor (40) stops rotating, so that the handle (20) rotates to complete the closing of the switch; When the motor (40) drives the shift block (80) to rotate through the speed reduction mechanism (50) and triggers the contact of the second micro switch (70), the motor (40) stops rotating, so that the handle (20) rotates to complete the opening of the switch; The speed reduction mechanism (50) comprises a screw rod (51), a first shaft pin (52), a second shaft pin (53), a first group of speed reduction teeth (54) and a second group of speed reduction teeth (55). The first shaft pin (52) and the second shaft pin (53) are fixedly arranged on a housing (10). The screw rod (51) is arranged on a motor (40). The first group of speed reduction teeth (54) is rotatably arranged on the first shaft pin (52) and connected to the screw rod (51). The second group of speed reduction teeth (55) is rotatably arranged on the second shaft pin (53) and connected to the first group of speed reduction teeth (54). The handle (20) is connected to the second group of speed reduction teeth (55). The shifting block (80) is arranged on the second group of speed reduction teeth (55).
2. A circuit breaker with a micro switch and a gear set controlling the tripping according to claim 1, characterized in that: The first group of deceleration teeth (54) includes a first front deceleration tooth (541) and a first rear deceleration tooth (542) rotatably arranged with the first shaft pin (52); the second group of deceleration teeth (55) includes a second front deceleration tooth (551) and a second rear deceleration tooth (552) rotatably arranged with the second shaft pin (53); and the shifting block (80) is arranged on the second rear deceleration tooth (552); The screw rod (51) is meshed with the first front reduction tooth (541), the first front reduction tooth (541) is meshed with the second front reduction tooth (551), the second front reduction tooth (551) is meshed with the first rear reduction tooth (542), the first rear reduction tooth (542) is meshed with the second rear reduction tooth (552), and the second rear reduction tooth (552) is used to mesh with the handle (20) and drive the handle (20) to close or open the switch.
3. A circuit breaker with a micro switch and a gear set controlling the tripping according to claim 2, characterized in that: The first front reduction tooth (541), the first rear reduction tooth (542) and the second front reduction tooth (551) all include a large tooth end and a small tooth end, and the second rear reduction tooth (552) includes a full tooth end (5521) and a missing tooth end (5522); The screw rod (51) meshes with the large tooth end of the first front reduction tooth (541), the small tooth end of the first front reduction tooth (541) meshes with the large tooth end of the second front reduction tooth (551), the small tooth end of the second front reduction tooth (551) meshes with the large tooth end of the first rear reduction tooth (542), the small tooth end of the first rear reduction tooth (542) meshes with the full tooth end (5521) of the second rear reduction tooth (552), and the toothless end (5522) of the second rear reduction tooth (552) is used to mesh with the handle (20) and drive the handle (20) to close or open the switch.
4. A circuit breaker with a micro switch and a gear set controlling the tripping according to claim 3, characterized in that: The full tooth end (5521) of the second rear reduction tooth (552) is a gear tooth surrounding the arc wall, and the missing tooth end (5522) is formed by extending part of the gear teeth of the full tooth end (5521).
5. A circuit breaker controlled by a micro switch and a gear set for tripping according to any one of claims 2 to 4, characterized in that: The central axis of the connecting hole (31) coincides with the central axis of the second rear reduction tooth (552); the shifting block (80) comprises an outer arc surface (81), a left shifting surface (82), an inner arc surface (83) and a right shifting surface (84) which are connected in sequence; the central axes of the outer arc surface (81) and the inner arc surface (83) coincide with the central axis of the second rear reduction tooth (552); and the surfaces where the left shifting surface (82) and the right shifting surface (84) are located coincide with the central axis of the second rear reduction tooth (552).
6. A circuit breaker with a micro switch and a gear set controlling the tripping according to claim 5, characterized in that: The distance between the outer arc surface (81) and the inner arc surface (83) is smaller than the radius of the connection hole (31) and larger than the length of the micro switch contact.