Gear arrangement structure for linkage reclosure and circuit breaker

Abstract

The utility model requests to protect a gear arrangement structure of a linkage recloser and a circuit breaker, which comprises a shell, and a motor, a first shaft pin, a second shaft pin, an output gear and a handle are arranged in the shell. The motor is fixed in the shell, and a worm is arranged on an output shaft of the motor; the first shaft pin is fixed in the shell, a first reduction gear set is rotationally arranged on the first shaft pin, and the first reduction gear set is meshed with the worm; the second shaft pin is fixed in the shell, a second reduction gear set is rotationally arranged on the second shaft pin, and the second reduction gear set is meshed with the first reduction gear set; the output gear is rotationally connected with the shell and meshed with the second reduction gear set. The handle is rotationally connected with the shell and fixedly connected to one side of the output gear. All gears originally arranged on a plane are arranged on the first shaft pin and the second shaft pin, so that the area, occupied by the reduction gear, of the inner side face of the shell is reduced, the reduction part is more concentrated, and the space occupied by the reduction gear is reduced to a certain extent.

Description

Technical Field

[0001] The utility model relates to the field of reclosing, and more specifically, to a gear arrangement structure for linking a reclosing switch and a circuit breaker. Background Art

[0002] The reclosing mechanism is a protection measure in the power system, which is used to automatically reclose the circuit breaker after a short-term fault to restore power supply.

[0003] When a fault occurs in the power system, the relay protection device will detect abnormalities, such as overcurrent, short circuit or ground fault, and send a tripping signal. After the circuit breaker trips, after a certain delay, the reclosing device will send a command to make the circuit breaker reclose. Usually, the reclosing is set to attempt to reclose only once or a limited number of times. All automatic reclosing circuit breakers use an AC motor as the actuator. To achieve three conversions of speed change, direction change and transformation, a relatively complex mechanism is required. The existing automatic reclosing circuit breakers generally have the common disadvantages of complex structure and large volume. Summary of the Utility Model

[0004] In view of the deficiencies of the existing technology, the utility model proposes a gear arrangement structure for linking a reclosing switch and a circuit breaker, and a switch assembly is arranged between the rectifier circuit board and the terminal, so as to cut off the circuit of the rectifier circuit board after power failure.

[0005] The technical solution of the utility model is as follows:

[0006] A gear arrangement structure for linking a reclosing switch and a circuit breaker, which includes a housing, a motor, a first shaft pin, a second shaft pin, an output gear and a handle arranged in the housing;

[0007] The motor is fixed in the housing, and a worm is arranged on the output shaft of the motor;

[0008] The first shaft pin is fixed in the housing, and a first set of reduction gears is rotatably arranged on the first shaft pin, and the first set of reduction gears meshes with the worm;

[0009] The second shaft pin is fixed in the housing, and a second set of reduction gears is rotatably arranged on the second shaft pin, and the second set of reduction gears meshes with the first set of reduction gears;

[0010] The output gear is rotatably connected to the housing and meshes with the second set of reduction gears;

[0011] The handle is rotatably connected to the housing and fixedly connected to one side of the output gear.

[0012] In summary, the above technical solution has the following beneficial effects: In this application, a speed reduction gear set is formed by the engagement of the first set of speed reduction gears and the second set of speed reduction gears, thereby reducing the rotational speed of the motor and increasing the torque. Finally, the power is transmitted to the output gear, and the closing and tripping of the handle are driven by the output gear. A jack for connecting the square shaft is provided on the handle, and the handle is connected to other circuit breakers through the square shaft, thereby driving the circuit breakers to close and trip together. All the gears originally arranged on the plane are arranged on the first shaft pin and the second shaft pin, thereby reducing the area occupied by the speed reduction gears on the inner side of the housing, making the speed reduction part more concentrated, and reducing the space occupied volume of the speed reduction gears to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the housing of a gear arrangement structure for a linkage reclosing and circuit breaker;

[0014] Figure 2 It is a schematic diagram of the worm of a gear arrangement structure for a linkage reclosing and circuit breaker;

[0015] Figure 3 It is a schematic diagram of the first set of speed reduction gears and the second set of speed reduction gears of a gear arrangement structure for a linkage reclosing and circuit breaker.

[0016] Reference numerals: 10, housing; 20, motor; 21, worm; 30, first shaft pin; 40, second shaft pin; 50, output gear; 60, handle; 70, first set of speed reduction gears; 71, first front speed reduction gear; 72, first middle speed reduction gear; 73, first rear speed reduction gear; 80, second set of speed reduction gears; 81, second front speed reduction gear; 82, second middle speed reduction gear; 83, second rear speed reduction gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described in detail below with reference to the 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 drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0018] As Figures 1-3As shown in the figure, a gear arrangement structure for interlocking reclosing and circuit breaker includes a housing 10, a motor 20, a first pin 30, a second pin 40, an output gear 50 and a handle 60 are arranged inside the housing 10; the motor 20 is fixed inside the housing 10, and a worm is arranged on the output shaft of the motor 20; the first pin 30 is fixed inside the housing 10, and a first set of reduction gears 70 is rotatably arranged on the first pin 30, and the first set of reduction gears 70 meshes with the worm; the second pin 40 is fixed inside the housing 10, and a second set of reduction gears 80 is rotatably arranged on the second pin 40, and the second set of reduction gears 80 meshes with the first set of reduction gears 70; the output gear 50 is rotatably connected to the housing 10 and meshes with the second set of reduction gears 80; the handle 60 is rotatably connected to the housing 10 and is fixedly connected to one side of the output gear 50. In this application, a reduction gear set is formed by the meshing of the first set of reduction gears 70 and the second set of reduction gears 80, so as to reduce the rotation speed of the motor 20, increase the torque, and finally transmit the power to the output gear 50. The closing and tripping of the handle 60 are driven by the output gear 50. A jack for connecting the square shaft is provided on the handle 60, and the handle 60 is connected to other circuit breakers through the square shaft, so as to drive the circuit breaker to close and trip together. All the gears originally arranged on the plane are arranged on the first pin 30 and the second pin 40, so as to reduce the area occupied by the reduction gears on the inner side of the housing 10, make the reduction part more concentrated, and reduce the space occupied volume of the reduction gears to a certain extent.

[0019] The first set of reduction gears 70 includes a first front reduction gear 71 rotatably arranged on the first pin 30, and the second set of reduction gears 80 includes a second front reduction gear 81 rotatably arranged on the second pin 40. The first front reduction gear 71 includes a large tooth end and a small tooth end; the worm meshes with the large tooth end of the first front reduction gear 71, the small tooth end of the first front reduction gear 71 meshes with the second front reduction gear 81, and the second front reduction gear 81 meshes with the output gear 50. The number of gears in the first set of reduction gears 70 and the second set of reduction gears 80 is the same. The first front reduction gear 71 is rotatably arranged on the first pin 30, and the second front reduction gear 81 is rotatably arranged on the second pin 40. In this embodiment, the number of gears in the first set of reduction gears 70 and the second set of reduction gears 80 is one. The first front reduction gear 71 reduces the rotation speed of the worm and transmits it to the second front reduction gear 81, and increases the torque. The second front reduction gear 81 is used to transmit power to the output gear 50, and finally drives the handle 60 to close and trip.

[0020] The first set of reduction gears 70 further includes a first intermediate reduction gear 72 rotatably arranged on the first pin 30, and the second set of reduction gears 80 further includes a second intermediate reduction gear 82 rotatably arranged on the second pin 40. Both the first intermediate reduction gear 72 and the second intermediate reduction gear 82 include a large tooth end and a small tooth end. The worm is engaged with the large gear of the first intermediate reduction gear 72, the small tooth end of the first intermediate reduction gear 72 is engaged with the large tooth end of the second intermediate reduction gear 82, and the small tooth end of the second intermediate reduction gear 82 is engaged with the large tooth end of the first front reduction gear 71. In this embodiment, there are two gears in both the first set of reduction gears 70 and the second set of reduction gears 80. The worm drives the first front reduction gear 71 to rotate through the first intermediate reduction gear 72 and the second intermediate reduction gear 82, thereby further reducing the rotational speed of the worm and transmitting it to the output gear 50, and increasing the torque, and finally driving the handle 60 to close and trip.

[0021] The first set of reduction gears 70 further includes a first rear reduction gear 73 rotatably arranged on the first pin 30, and the second set of reduction gears 80 further includes a second rear reduction gear 83 rotatably arranged on the second pin 40. Both the first rear reduction gear 73 and the second rear reduction gear 83 include a large tooth end and a small tooth end. The first rear reduction gear 73 is located on the side of the first intermediate reduction gear 72 away from the first front reduction gear 71; the second rear reduction gear 83 is located on the side of the second intermediate reduction gear 82 away from the second front reduction gear 81; the worm is engaged with the large tooth end of the first rear reduction gear 73, the small tooth end of the first rear reduction gear 73 is engaged with the large tooth end of the second rear reduction gear 83, and the small tooth end of the second rear reduction gear 83 is engaged with the large gear of the first intermediate reduction gear 72. In this embodiment, there are three gears in both the first set of reduction gears 70 and the second set of reduction gears 80. The first intermediate reduction gear 72 is located between the first front reduction gear 71 and the first rear reduction gear 73, and the second intermediate reduction gear 82 is located between the second front reduction gear 81 and the second rear reduction gear 83. Through step-by-step reduction, the rotational speed of the worm is further reduced and transmitted to the output gear 50, and the torque is increased, and finally the handle 60 is driven to close and trip. Similarly, on this basis, the number of gears in the first set of reduction gears 70 and the second set of reduction gears 80 can be further increased to achieve the purpose of speed reduction.

[0022] The small tooth ends of the first front reduction gear 71, the first intermediate reduction gear 72, the second intermediate reduction gear 82, and the second rear reduction gear 83 are all axially closer to the second front reduction gear 81 than the large tooth ends, and the large tooth end of the first rear reduction gear 73 is axially closer to the second front reduction gear 81 than the small tooth end.

[0023] The lengths of the small tooth ends of the first front reduction gear 71, the first middle reduction gear 72, and the second middle reduction gear 82 are the same, and the lengths of the large tooth ends of the first front reduction gear 71, the first middle reduction gear 72, and the second middle reduction gear 82 are the same. Specifically, the shapes and specifications of the first front reduction gear 71, the first middle reduction gear 72, and the second middle reduction gear 82 are the same.

[0024] The length of the small tooth end of the second rear reduction gear 83 is greater than the length of the small tooth end of the second middle reduction gear 82. There are a total of six reduction gears in the first set of reduction gears 70 and the second set of reduction gears 80. Five of them include small tooth ends and large tooth ends. The five reduction gears are arranged in the same direction to meet the basic reduction requirements. In this embodiment, the small reduction gears of the first front reduction gear 71, the first middle reduction gear 72, the second middle reduction gear 82, and the second rear reduction gear 83 are all arranged in the same direction, and the orientations of the small tooth end and the large tooth end of the first rear reduction gear 73 are opposite to those of the other reduction gears. Therefore, the small tooth end of the second rear reduction gear 83 needs to be increased. After such a setting, the overall height of the six reduction gears does not change much, but the increase in the small tooth end of the second rear reduction gear 83 achieves the effect of increasing the torque.

[0025] 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 within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A gear arrangement structure for a linked reclosing switch and a circuit breaker, characterized in that: The invention comprises a housing (10), wherein a motor (20), a first shaft pin (30), a second shaft pin (40), an output gear (50) and a handle (60) are arranged in the housing (10); The motor (20) is fixed in the housing (10), and a worm (21) is arranged on the output shaft of the motor (20); The first shaft pin (30) is fixed in the housing (10), and a group of reduction gears (70) are rotatably arranged on the first shaft pin (30), and the group of reduction gears (70) is meshed with the worm (21); The second shaft pin (40) is fixed in the housing (10), and a second reduction gear group (80) is rotatably arranged on the second shaft pin (40), and the second reduction gear group (80) is meshed with the first reduction gear group (70); The output gear (50) is rotatably connected to the housing (10) and meshes with the second reduction gear set (80); The handle (60) is rotatably connected to the housing (10) and is fixedly connected to one side of the output gear (50).

2. The gear arrangement structure of the linked reclosing switch and circuit breaker according to claim 1, characterized in that: The first reduction gear group (70) includes a first front reduction gear (71) rotatably disposed on a first shaft pin (30), and the second reduction gear group (80) includes a second front reduction gear (81) rotatably disposed on a second shaft pin (40), wherein the first front reduction gear (71) includes a large tooth end and a small tooth end; The worm (21) meshes with the large tooth end of the first front reduction gear (71), the small tooth end of the first front reduction gear (71) meshes with the second front reduction gear (81), and the second front reduction gear (81) meshes with the output gear (50).

3. The gear arrangement structure of the linked reclosing switch and circuit breaker according to claim 2, characterized in that: The first reduction gear group (70) further comprises a first middle reduction gear (72) rotatably disposed on a first shaft pin (30), and the second reduction gear group (80) further comprises a second middle reduction gear (82) rotatably disposed on a second shaft pin (40), wherein both the first middle reduction gear (72) and the second middle reduction gear (82) comprise a large tooth end and a small tooth end; The worm (21) is meshed with the large gear of the first middle reduction gear (72), the small tooth end of the first middle reduction gear (72) is meshed with the large tooth end of the second middle reduction gear (82), and the small tooth end of the second middle reduction gear (82) is meshed with the large tooth end of the first front reduction gear (71).

4. The gear arrangement structure of the linked reclosing switch and circuit breaker according to claim 3, characterized in that: The first reduction gear group (70) further comprises a first rear reduction gear (73) rotatably disposed on a first shaft pin (30), and the second reduction gear group (80) further comprises a second rear reduction gear (83) rotatably disposed on a second shaft pin (40), wherein both the first rear reduction gear (73) and the second rear reduction gear (83) comprise a large tooth end and a small tooth end; The first rear reduction gear (73) is located on a side of the first middle reduction gear (72) away from the first front reduction gear (71); The second rear reduction gear (83) is located on a side of the second middle reduction gear (82) away from the second front reduction gear (81); The worm (21) meshes with the large tooth end of the first rear reduction gear (73), the small tooth end of the first rear reduction gear (73) meshes with the large tooth end of the second rear reduction gear (83), and the small tooth end of the second rear reduction gear (83) meshes with the large gear of the first middle reduction gear (72).

5. The gear arrangement structure of the linked reclosing switch and circuit breaker according to claim 4, characterized in that: The small tooth ends of the first front reduction gear (71), the first middle reduction gear (72), the second middle reduction gear (82) and the second rear reduction gear (83) are all closer to the second front reduction gear (81) in the axial direction than the large tooth ends, and the large tooth end of the first rear reduction gear (73) is closer to the second front reduction gear (81) in the axial direction than the small tooth end.

6. The gear arrangement structure of the linked reclosing switch and circuit breaker according to claim 5, characterized in that: The lengths of the small tooth ends of the first front reduction gear (71), the first middle reduction gear (72) and the second middle reduction gear (82) are all the same, and the lengths of the large tooth ends of the first front reduction gear (71), the first middle reduction gear (72) and the second middle reduction gear (82) are all the same.

7. The gear arrangement structure of the linked reclosing switch and circuit breaker according to claim 5, characterized in that: The length of the small tooth end of the second rear reduction gear (83) is greater than the length of the small tooth end of the second middle reduction gear (82).

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