CN112185777A

CN112185777A - Miniature electric operating mechanism for circuit breaker based on gear and rack meshing

Info

Publication number: CN112185777A
Application number: CN202011153026.1A
Authority: CN
Inventors: 唐明群; 孙大璟; 徐文; 刘建军
Original assignee: Jiangsu Qihou Intelligent Electrical Equipment Co ltd
Current assignee: Jiangsu Qihou Intelligent Electrical Equipment Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-01-05

Abstract

The invention relates to a miniature electric operating mechanism for a circuit breaker based on gear and rack meshing, which comprises a mechanical link mechanism for the circuit breaker, a handle, a rotary plate and a contact box for the circuit breaker, wherein a gear set is arranged in the electric operating mechanism; a circuit board in the electric operating mechanism is provided with a Hall sensor or a light sensation sensing device, so that the action position of the circuit breaker can be accurately sensed. Through rack and pinion meshing transmission, hall sensor or light sense induction system positional information perception, can guarantee decidedness and the uniformity of divide-shut brake operating position, can guarantee the reliability of circuit breaker position accuracy discernment again, thoroughly solve traditional circuit breaker electric operating mechanism and divide, close a floodgate problem of position.

Description

Miniature electric operating mechanism for circuit breaker based on gear and rack meshing

Technical Field

The invention relates to a miniature electric operating mechanism, in particular to a miniature electric operating mechanism for a circuit breaker based on gear and rack meshing.

Background

The working mechanism of the electric operating mechanism of the traditional circuit breaker is as follows: the connecting rod is pushed to act to pull the handle of the circuit breaker through the rotating motion of the motor of the electric operating mechanism, so that the opening and closing operations of the circuit breaker are realized; during operation, the connecting rod needs to perform up/down and front/back displacement movement through an optical axis riveted on the handle. In the action process, the positions of the end parts of the connecting rods are uncontrollable due to two modes of pulling and pushing, and the hidden danger of wrong state identification of the opening and closing positions of the circuit breaker is caused due to the difference of the action positions, so that the opening and closing fault positions are generated.

For example, chinese patent application publication No. CN 102290298A discloses a transmission mechanism of an electric operating mechanism for a miniature circuit breaker, which includes a housing, a driving motor mounted in the housing, a handle mounted on the housing and rotatable around a fixed shaft, a gear mounted at a lower end of the handle and located in the housing, a crank wall mounted on an output shaft of the driving motor and a driving gear matched with the crank wall, the driving gear engaged with the gear, and a gap provided between the crank wall and the matching device of the driving gear. However, in this transmission mechanism, when the drive gear stops rotating, the drive gear needs to be manually opened and closed, which is dangerous to some extent and has low operating efficiency.

For example, the chinese utility model patent with the publication number CN 205376435U discloses an electric operating mechanism for a circuit breaker, which comprises a housing, wherein a motor, a gear reduction mechanism, a driving handle and a sector gear are arranged in the housing, the gear reduction mechanism comprises a plurality of reduction gears and a tripping device, the tripping device comprises a tripping driving member and a tripping rotary jump buckle, the tripping driving member is coaxially and movably connected with the tripping rotary handle, the tripping driving member is of a gear structure and is in transmission engagement with the reduction gears, a shifting block for shifting the tripping rotary jump buckle to swing is arranged on the tripping driving member, and a hole which corresponds to the tripping rotary jump buckle and is of an arc structure is arranged on the housing; the sector gear is in transmission engagement with the reduction gear, and the electric operating mechanism further comprises a locking buckle for locking the opening state of the rotary control disc, and when a handle of the electric operating mechanism is damaged, forced closing can not be performed through the handle of the circuit breaker. However, in the operating mechanism, the sector gear is meshed with the reduction gear, so that the accuracy of the sector gear is not high, and the operating mechanism is in a swinging mode, so that the difference of the action positions can cause the hidden trouble of wrong identification of the opening and closing position states of the circuit breaker.

Disclosure of Invention

Based on the problems, the invention provides a miniature electric operating mechanism for a circuit breaker based on gear and rack meshing, and aims to solve the problems that the end position of a connecting rod is uncontrollable in both pulling and pushing modes, and the difference of action positions causes the hidden danger of wrong identification of the opening and closing position states of the circuit breaker, so that the opening and closing virtual positions are generated. Therefore, the invention adopts the following technical scheme.

The invention relates to a miniature electric operating mechanism for a circuit breaker based on gear and rack meshing, which comprises an electric operating mechanism body, wherein the electric operating mechanism body comprises a mechanical link mechanism for the circuit breaker, a handle, a rotary plate and a contact box for the circuit breaker; the mechanical link mechanism for the circuit breaker is fixed on the contact box for the circuit breaker through a shaft; the electric operating mechanism drives a handle specified on the rotary plate to swing through internal gear set transmission, the mechanical link mechanism for the circuit breaker is driven to move through the swinging of the rotary plate, the opening/closing operation of a contact box for the circuit breaker is controlled, racks meshed with gears are installed on the top or the left side and the right side of the handle, a handle assembly fixed with the rotary plate is driven through the forward and reverse rotation of a motor arranged in the gear box, and the handle assembly swings back and forth left and right around a rotation center on a side plate of the mechanical link mechanism, so that the opening and closing operation of the circuit breaker is realized; meanwhile, a circuit board inside the electric operating mechanism is provided with a Hall sensor or a light sensation sensing device, so that the action position of the circuit breaker can be accurately sensed. Through rack and pinion meshing transmission and hall sensor or light sense induction system positional information perception, can guarantee decidedness and the uniformity of divide-shut brake operating position, can guarantee the reliability of circuit breaker position accuracy identification again, can thoroughly solve the problem of traditional circuit breaker electric operating mechanism branch, the virtual position of closing a floodgate.

Preferably, the electric operating mechanism body is divided into a first electric operating mechanism and a second electric operating mechanism, and the first electric operating mechanism comprises a first handle, a first rotating plate, a first circuit breaker mechanical link mechanism and a first circuit breaker contact box; the second electric operating mechanism comprises a second handle, a second rotating plate, a mechanical link mechanism for the second circuit breaker and a contact box for the second circuit breaker.

In any of the above schemes, preferably, when the rack is located at the top of the handle, the rack is a first rack, the first handle and the first revolving plate form a combined part, and the combined part is provided with a hall sensing unit; when the racks are positioned on the left side and the right side of the handle, the racks are second racks, the second handle and the second rotary plate form an assembly, and the second handle is provided with a light sensing unit.

In any of the above schemes, preferably, the inner wall of the second handle is provided with a positioning boss, the second rotary plate is tightly connected with the positioning boss through a screw, and the second rotary plate are integrally combined into a combined piece.

In any of the above aspects, preferably, a hall receiving unit is provided on the circuit board of the first electric operating mechanism; the circuit board of the second electric operating mechanism is provided with a light sensing receiving unit.

In any one of the above aspects, it is preferable that the first electric operating mechanism further includes a first motor and a first gear; the second electric operating mechanism further includes a second motor and a second gear.

In any of the above schemes, preferably, the matching manner of the gear and the rack includes an up-down manner and a left-right manner, and when the gear is up, the rack is down; when the gear is in the middle position, the two sections of racks are distributed on the left side and the right side of the gear.

In any of the above aspects, it is preferred that the gear has a diameter of 13 to 18 mm; the side length of the rack is 49-56 mm.

In any of the above embodiments, it is preferable that the first electric operating mechanism has a size of 70 mm × 80 mm × 56 mm, and an overall size of the first electric operating mechanism combined with the mechanical link mechanism for the circuit breaker, the handle, and the pivoting plate is 70 mm × 80 mm × 74 mm.

In any of the above embodiments, the second electric operating mechanism preferably has dimensions of 119 mm × 85 mm × 53 mm, and the overall dimensions of the second electric operating mechanism combined with the mechanical link mechanism for the circuit breaker, the handle, and the pivoting plate are 119 mm × 85 mm × 94 mm.

Drawings

These and other characteristic aspects and advantages of the present invention will now be described, as preferred but not limiting embodiments thereof, will become apparent upon reading the following detailed description with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of a preferred embodiment of the miniature electric operating mechanism for the circuit breaker based on the gear-rack meshing according to the invention.

Fig. 2 is a schematic view showing the structure of the handle in the preferred embodiment of fig. 1 of the miniature electric operating mechanism for the circuit breaker based on the rack and pinion meshing according to the present invention.

Fig. 3 is a schematic view showing the installation of the hall sensing unit in the preferred embodiment of the miniature electric operating mechanism for the circuit breaker based on rack and pinion meshing according to the present invention shown in fig. 2.

Fig. 4 is a schematic view illustrating the installation of the light-sensitive sensing unit in the preferred embodiment of fig. 1 of the miniature electric operating mechanism for the circuit breaker based on the rack-and-pinion meshing according to the present invention.

Fig. 5 is a schematic operation diagram of the preferred embodiment of the miniature electric operating mechanism for the circuit breaker based on the gear-rack meshing according to the invention, which is shown in fig. 1.

Fig. 6 is a schematic structural view of another preferred embodiment of the miniature electric operating mechanism for the circuit breaker based on the gear-rack meshing according to the invention.

Fig. 7 is a schematic view showing the structure of the handle in the preferred embodiment of fig. 6 of the miniature electric operating mechanism for circuit breaker based on rack and pinion meshing according to the present invention.

Fig. 8 is a schematic structural view of the handle and pivotal plate assembly of the preferred embodiment of fig. 6 of the miniature electric operating mechanism for circuit breakers based on rack and pinion engagement in accordance with the present invention.

Fig. 9 is a schematic operation diagram of the preferred embodiment of the miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing according to the present invention, as shown in fig. 6.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

The first embodiment is as follows:

referring now to the drawings, fig. 1-5 depict schematic structural views of the miniature electric operating mechanism for the circuit breaker based on gear-rack meshing according to the invention. A miniature electric operating mechanism for a circuit breaker based on gear and rack meshing comprises an electric operating mechanism body, wherein the electric operating mechanism body comprises a mechanical link mechanism for the circuit breaker, a handle, a rotary plate and a contact box for the circuit breaker, and the electric operating mechanism is fixed on a middle cover of the circuit breaker; the mechanical link mechanism for the circuit breaker is fixed on the contact box for the circuit breaker through a shaft; the electric operating mechanism drives a handle specified on the rotary plate to swing through internal gear set transmission, the mechanical link mechanism for the circuit breaker is driven to move through the swinging of the rotary plate, the opening/closing operation of a contact box for the circuit breaker is controlled, a rack meshed with a gear is installed at the top of the handle, a handle assembly fixed with the rotary plate is driven through the forward and reverse rotation of a motor arranged in a gear box, and the left and right reciprocating swinging is carried out around a rotating center on a side plate of the mechanical link mechanism, so that the opening and closing operation of the circuit breaker is realized; meanwhile, a circuit board inside the electric operating mechanism is provided with a Hall sensor or a light sensation sensing device, so that the action position of the circuit breaker can be accurately sensed. Through rack and pinion meshing transmission and hall sensor or light sense induction system positional information perception, can guarantee decidedness and the uniformity of divide-shut brake operating position, can guarantee the reliability of circuit breaker position accuracy identification again, can thoroughly solve the problem of traditional circuit breaker electric operating mechanism branch, the virtual position of closing a floodgate.

The handle is tightly connected with the rotary plate, and the handle and the rotary plate form an integral assembly, so that the fixing is firmer, the positioning is more accurate, and the guarantee is provided for high-precision transmission; the action response is fast, and the response time can be as fast as 1.2 s.

In this embodiment, the electric operating mechanism bodies are a first electric operating mechanism 1-1 and a second electric operating mechanism 1-2, and the first electric operating mechanism 1-1 includes a first handle 2-1, a first rotating plate 3-1, a first circuit breaker mechanical link mechanism 4-1, and a first circuit breaker contact box 5-1.

Referring to fig. 2, the structure of the handle in the preferred embodiment of the miniature electric operating mechanism for circuit breaker based on gear-rack meshing according to the present invention is shown in fig. 1.

In this embodiment, when the rack is located at the top of the handle, the rack is the first rack 6, the first handle 2-1 and the first rotating plate 3-1 form an assembly, and the assembly is provided with the hall sensing unit 7, so that the position of the circuit breaker can be accurately sensed.

Referring to fig. 3, a schematic diagram of the installation of the hall sensing unit in the preferred embodiment of the miniature electric operating mechanism for circuit breakers based on rack and pinion meshing according to the present invention is shown in fig. 2.

In the embodiment, a circuit board of the first electric operating mechanism 1-1 is provided with a hall receiving unit 11; the circuit board of the second electric operating mechanism 1-2 is provided with a light-sensitive receiving unit 12 (as shown in fig. 4).

The Hall sensing unit 7 and the Hall receiving unit 11 are matched in a non-contact sensing structure form, and position information can be accurately acquired.

In the present embodiment, the first electric operating mechanism 1-1 further includes a first motor 13-1 and a first gear 14-1 (see fig. 5).

The working process of the electric operating mechanism of the invention is as follows: the motor 13-1 on the first electric operating mechanism 1-1 firstly transmits power to the gear 14-1 through the gear set, and then the gear 14-1 is meshed with the rack feature on the handle 2-1 to drive the handle 2-1 to swing back and forth.

In this embodiment, the gear and the rack are engaged in an up-down manner, and when the gear is up, the rack is down.

In the present embodiment, the diameter of the gear is 13-18 mm; the side length of the rack is 49-56 mm.

In the present embodiment, the first electric operating mechanism 1-1 has a size of 70 mm × 80 mm × 56 mm, and the overall size of the combination with the mechanical link mechanism for the circuit breaker, the handle, and the pivoting plate is 70 mm × 80 mm × 74 mm.

When the Hall sensing unit 7 on the rotary plate 3-1 of the first electric operating mechanism 1-1 moves to the position opposite to the Hall receiving unit 11 on the circuit board of the electric operating mechanism, a signal is generated to control the motor of the electric operating mechanism to stop rotating.

Example two:

referring now to the drawings, fig. 6-9 depict schematic structural views of the miniature electric operating mechanism for the circuit breaker based on gear-rack meshing according to the invention. A miniature electric operating mechanism for a circuit breaker based on gear and rack meshing comprises an electric operating mechanism body, wherein the electric operating mechanism body comprises a mechanical link mechanism for the circuit breaker, a handle, a rotary plate and a contact box for the circuit breaker, and the electric operating mechanism is fixed on a middle cover of the circuit breaker; the mechanical link mechanism for the circuit breaker is fixed on the contact box for the circuit breaker through a shaft; the electric operating mechanism drives a handle specified on the rotary plate to swing through internal gear set transmission, the mechanical link mechanism for the circuit breaker is driven to move through the swinging of the rotary plate, the opening/closing operation of a contact box for the circuit breaker is controlled, racks meshed with gears are installed on the left side and the right side of the handle, a handle assembly fixed with the rotary plate is driven through the forward rotation and the reverse rotation of a motor arranged in a gear box, and the handle assembly swings back and forth left and right around a rotation center on a side plate of the mechanical link mechanism, so that the opening and closing operation of the circuit breaker is realized; meanwhile, a circuit board inside the electric operating mechanism is provided with a Hall sensor or a light sensation sensing device, so that the action position of the circuit breaker can be accurately sensed. Through rack and pinion meshing transmission and hall sensor or light sense induction system positional information perception, can guarantee decidedness and the uniformity of divide-shut brake operating position, can guarantee the reliability of circuit breaker position accuracy identification again, can thoroughly solve the problem of traditional circuit breaker electric operating mechanism branch, the virtual position of closing a floodgate.

In this embodiment, the electric operating mechanism body is a second electric operating mechanism 1-2, and includes a second handle 2-2, a second rotating plate 3-2, a second mechanical link mechanism 4-2 for circuit breaker, and a second contact box 5-2 for circuit breaker.

Referring next to fig. 7, there is shown a schematic structural view of the handle of the preferred embodiment of fig. 6 of the miniature electric operating mechanism for circuit breakers based on rack and pinion meshing according to the present invention.

In this embodiment, when the rack is located on the left side and the right side of the handle, the rack is the second rack 8, the second handle 2-2 and the second rotary plate 3-2 form an assembly, and the second handle 2-2 is provided with the light sensing unit 9, so that the action position of the circuit breaker can be accurately sensed.

Fig. 8 is a schematic structural view of the handle and rotary plate assembly of the preferred embodiment of fig. 6 of the miniature electric operating mechanism for circuit breakers based on rack and pinion meshing according to the present invention.

In this embodiment, the inner wall of the second handle 2-2 is provided with a positioning boss 10, and the second rotary plate 3-2 is tightly connected with the positioning boss by a screw, and the positioning boss and the second rotary plate form an assembly.

Referring finally to fig. 9, there is shown a schematic diagram of the operation of the preferred embodiment of the miniature electric operating mechanism for circuit breakers based on rack and pinion engagement according to the present invention as shown in fig. 6.

In this embodiment, the circuit board of the second electric operating mechanism 1-2 is provided with a light-sensitive receiving unit 12.

The light sensing unit 9 and the light receiving unit 12 are in a non-contact sensing structure, and position information can be accurately acquired.

In the present embodiment, the second electric operating mechanism 1-2 further includes a second motor 13-2 and a second gear 14-2.

The working process of the electric operating mechanism of the invention is as follows: the motor 13-2 on the second electric operating mechanism 1-2 firstly transmits power to the gear 14-2 through the gear set, and then the gear 14-2 is meshed with the rack feature on the handle 2-2 to drive the handle 2-2 to swing back and forth.

In this embodiment, the matching manner between the gear and the rack is left and right, the gear is located at the middle position, and the two sections of racks are distributed on the left and right sides of the gear.

In this embodiment, the second electric operating mechanism 1-2 has dimensions of 119 mm × 85 mm × 53 mm, and the overall dimensions of the second electric operating mechanism combined with the mechanical link mechanism for a circuit breaker, the handle, and the pivoting plate are 119 mm × 85 mm × 94 mm.

When the surface light sensing unit 9 of the handle 2-2 of the second electric operating mechanism 1-2 moves to the light sensing receiving unit 12 on the circuit board of the electric operating mechanism, a signal is generated to control the motor of the electric operating mechanism to stop rotating.

Although the present invention has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present invention. The scope of the present invention is defined by the appended claims, and may include various modifications, alterations, and equivalents made thereto without departing from the scope and spirit of the invention.

Claims

1. A miniature electric operating mechanism for a circuit breaker based on gear and rack meshing comprises an electric operating mechanism body, wherein the electric operating mechanism body comprises a mechanical link mechanism for the circuit breaker, a handle, a rotary plate and a contact box for the circuit breaker, and the electric operating mechanism is fixed on a middle cover of the circuit breaker; the mechanical link mechanism for the circuit breaker is fixed on the contact box for the circuit breaker through a shaft; the electric operating mechanism drives the rule through the transmission of the internal gear set to swing the handle on the rotary plate, drives the mechanical link mechanism for the circuit breaker to move through the swing of the rotary plate, and controls the opening/closing operation of the contact box for the circuit breaker, and is characterized in that: and racks meshed with the gears are arranged at the top or the left and the right sides of the handle.

2. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 1, wherein: the electric operating mechanism body is divided into a first electric operating mechanism (1-1) and a second electric operating mechanism (1-2), wherein the first electric operating mechanism (1-1) comprises a first handle (2-1), a first rotating plate (3-1), a first circuit breaker mechanical link mechanism (4-1) and a first circuit breaker contact box (5-1); the second electric operating mechanism (1-2) comprises a second handle (2-2), a second rotating plate (3-2), a second mechanical link mechanism (4-2) for the circuit breaker and a second contact box (5-2) for the circuit breaker.

3. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 2, wherein: when the rack is positioned at the top of the handle, the rack is a first rack (6), the first handle (2-1) and the first rotary plate (3-1) form an assembly, and a Hall sensing unit (7) is arranged on the assembly; when the racks are positioned at the left side and the right side of the handle, the racks are the second racks (8), the second handle (2-2) and the second rotary plate (3-2) form an assembly, and the second handle (2-2) is provided with a light sensing unit (9).

4. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 2 or 3, wherein: the inner wall of the second handle (2-2) is provided with a positioning boss (10), the second rotary plate (3-2) is tightly connected with the positioning boss through a screw, and the second rotary plate and the screw form a combined piece integrally.

5. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 2, wherein: a Hall receiving unit (11) is arranged on a circuit board of the first electric operating mechanism (1-1); the circuit board of the second electric operating mechanism (1-2) is provided with a light-sensitive receiving unit (12).

6. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 2 or 5, wherein: the first electric operating mechanism (1-1) also comprises a first motor (13-1) and a first gear (14-1); the second electric operating mechanism (1-2) further comprises a second motor (13-2) and a second gear (14-2).

7. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 1, wherein: the matching mode of the gear and the rack comprises an upper mode, a lower mode and a left-right mode, and when the gear is on, the rack is under; when the gear is in the middle position, the two sections of racks are distributed on the left side and the right side of the gear.

8. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 1 or 7, wherein: the diameter of the gear is 13-18 mm; the side length of the rack is 49-56 mm.

9. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 2, wherein: the first electric operating mechanism (1-1) has the size of 70 mm × 80 mm × 56 mm, and the overall size of the first electric operating mechanism combined with the mechanical link mechanism for the circuit breaker, the handle and the rotating plate is 70 mm × 80 mm × 74 mm.

10. The miniature electric operating mechanism for circuit breakers based on rack-and-pinion meshing of claim 2, wherein: the second electric operating mechanism (1-2) has the size of 119 mm × 85 mm × 53 mm, and the overall size of the second electric operating mechanism combined with the mechanical link mechanism for the circuit breaker, the handle and the rotating plate is 119 mm × 85 mm × 94 mm.