Circuit breaker comprising auxiliary contact assembly
By designing a circuit breaker that includes a circuit breaker shell, the main axis of the circuit breaker, the main contact component, and the connecting rod component, the cooperation of the main axis driver and connecting rod component is used to realize the timing linkage of the auxiliary contact component and the main contact point. It solves the problem that the auxiliary contacts are pre -gates and the sequences are difficult to link in the existing technology, and the design efficiency of the driver of the circuit breaker is improved.
Patent Information
- Application Number
- CN202310890616.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-19
- Publication Date
- 2025-01-21
AI Technical Summary
In existing circuit breakers, the pre-closing and opening timing of the auxiliary contacts is difficult to link with the main contact, which makes it difficult to achieve the pre-closing of the auxiliary contacts before the main contacts are closed and before the main contacts are opened. pre-opening of auxiliary contacts.
A circuit breaker that includes a circuit breaker, the main axis of the circuit breaker, the main contact component, and the connecting rod component is designed. The first cooperation part and the second cooperation department drive the auxiliary contact component to realize the auxiliary contacts before the main contact gates and the auxiliary contacts before the main contacts are divided into pre -split.
The pre-closing of the auxiliary contacts is completed before the main contacts are closed, and the pre-opening of the auxiliary contacts is completed before the main contacts are opened, which improves the coordination and efficiency of the circuit breaker's driving mechanism design.
Smart Images
Figure CN119340169A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a circuit breaker including an auxiliary contact assembly. Background Art
[0002] The closing and opening of the auxiliary contacts of the circuit breaker need to be coordinated with the main contacts of the circuit breaker. The opening and closing timing of the auxiliary contacts needs to be linked with the opening and closing timing of the main contacts of the circuit breaker. How to design a set of auxiliary contact drive mechanisms that are linked with the main contacts is a challenge. The drive mechanism needs to achieve the pre-closing of the auxiliary contacts before the main contacts are closed and the pre-opening of the auxiliary contacts before the main contacts are opened. Summary of the invention
[0003] In order to solve one or more deficiencies in the prior art, according to one aspect of the present disclosure, a circuit breaker including an auxiliary contact assembly is provided, wherein the circuit breaker includes a circuit breaker housing, a circuit breaker main shaft, a main contact assembly and a connecting rod assembly.
[0004] The circuit breaker housing rotatably supports the circuit breaker main shaft.
[0005] The auxiliary contact assembly is rotatably supported inside the circuit breaker housing.
[0006] The connecting rod assembly is connected between the circuit breaker main shaft and the auxiliary contact assembly.
[0007] The driving mechanism of the circuit breaker can drive the rotation of the main shaft of the circuit breaker, and the rotation of the main shaft of the circuit breaker can drive the main contact assembly to rotate between its closing position and opening position.
[0008] The rotation of the circuit breaker main shaft can act on the connecting rod assembly and drive the auxiliary contact assembly to rotate between its closed position and open position through the connecting rod assembly, so that the auxiliary contact assembly is pre-closed before the main contact assembly is closed and the auxiliary contact assembly is opened after the main contact assembly is closed.
[0009] According to the above aspect of the present disclosure, a first main shaft driving portion and a second main shaft driving portion are provided on the outer circumferential surface of the circuit breaker main shaft.
[0010] The first main shaft drive portion and the second main shaft drive portion are spaced apart from each other along the circumferential direction of the outer circumferential surface and have different radial heights relative to the rotation axis of the circuit breaker main shaft, so that the first main shaft drive portion and the second main shaft drive portion do not act on the connecting rod assembly at the same time.
[0011] According to the above aspect of the present disclosure, when the circuit breaker main shaft rotates in its first direction, the first main shaft driving portion is capable of acting on the connecting rod assembly prior to the second main shaft driving portion.
[0012] When the circuit breaker main shaft rotates in a second direction opposite to the first direction, the second main shaft driving portion can act on the connecting rod assembly before the first main shaft driving portion.
[0013] According to the above aspects of the present disclosure, main shaft matching portions are provided on both end surfaces of the circuit breaker main shaft.
[0014] The main shaft matching portion matches with the main contact matching portion provided on the main contact assembly, so that the rotation of the circuit breaker main shaft can drive the main contact assembly to rotate between its closing position and opening position.
[0015] According to the above aspect of the present disclosure, the first spindle driving portion is a first spindle pin in a cylindrical shape.
[0016] The second spindle driving part is a second spindle paddle.
[0017] According to the above aspect of the present disclosure, the connecting rod assembly includes a first connecting rod and a second connecting rod.
[0018] One end of the second connecting rod is connected to the first connecting rod.
[0019] The other end of the second link is connected to the auxiliary contact assembly.
[0020] According to the above aspect of the present disclosure, the first connecting rod includes a first connecting rod body, a first connecting rod rotating shaft, a first connecting rod connecting shaft, a first matching portion, and a second matching portion.
[0021] The first connecting rod rotation axis extends from both sides of the first connecting rod body.
[0022] The first connecting rod connecting axis is arranged parallel to the first connecting rod rotating axis.
[0023] The first matching portion and the second matching portion are arranged on the first connecting rod body and are respectively located on both sides of the rotation axis of the first connecting rod rotation shaft.
[0024] According to the above aspects of the present disclosure, an elongated housing opening slot is provided on the circuit breaker housing.
[0025] A sliding block capable of sliding therein is arranged in the opening groove of the shell.
[0026] The first connecting rod rotating shaft is slidably and rotatably fitted in the housing opening groove.
[0027] A slider torsion spring is also arranged in the circuit breaker housing, one end of the slider torsion spring acts on the slider, and the other end of the slider torsion spring acts on the circuit breaker housing.
[0028] Under the action of the slider torsion spring, the slider can abut against the first connecting rod rotation axis.
[0029] According to the above aspect of the present disclosure, the first mating portion is a first mating tab having an inclined surface.
[0030] When the circuit breaker main shaft rotates, the first main shaft pin can be slidably engaged on the inclined surface, so as to shift the first engaging paddle, thereby enabling the first connecting rod to rotate around the first connecting rod rotation axis.
[0031] The second matching portion is a second matching pin in a cylindrical shape.
[0032] When the circuit breaker main shaft rotates, the second main shaft paddle can act on the second matching pin, so that the first connecting rod can rotate around the first connecting rod rotation axis.
[0033] According to the above aspects of the present disclosure, the auxiliary contact assembly includes an auxiliary moving contact, an auxiliary stationary contact and an auxiliary contact compression spring.
[0034] The auxiliary moving contact includes an auxiliary moving contact rotation shaft, and the auxiliary moving contact is rotatably supported by the circuit breaker housing through the auxiliary moving contact rotation shaft.
[0035] The auxiliary static contact is fixedly arranged on the circuit breaker housing.
[0036] A moving contact is arranged on one end of the auxiliary moving contact, and the moving contact can contact or separate with a stationary contact arranged on the auxiliary stationary contact.
[0037] The acting force of the auxiliary contact compression spring can act on the other end of the auxiliary moving contact.
[0038] According to the above aspect of the present disclosure, the auxiliary moving contact further includes an auxiliary moving contact connecting shaft.
[0039] One end of the second connecting rod is connected to the first connecting rod connecting shaft.
[0040] The other end of the second connecting rod is connected to the auxiliary moving contact connecting shaft.
[0041] In the length direction of the auxiliary moving contact, the auxiliary moving contact rotation axis is located between the other end of the auxiliary moving contact and the auxiliary moving contact connection axis.
[0042] According to the above aspect of the present disclosure, when the circuit breaker driving mechanism drives the circuit breaker main shaft to rotate in its first direction, the slider torsion spring acts on the slider, and the slider presses against the first connecting rod rotation axis toward the circuit breaker main shaft.
[0043] When the horizontal component of force applied by the first main shaft pin on the first mating paddle is smaller than the horizontal component of force applied by the slider torsion spring on the first connecting rod rotation axis, the slider will not slide, the first main shaft pin drives the first connecting rod to rotate around the first connecting rod rotation axis in its first direction, the first connecting rod drives the second connecting rod, and then the second connecting rod drives the auxiliary moving contact to rotate around the auxiliary moving contact rotation axis toward the auxiliary static contact, and the auxiliary moving contact continues to rotate toward the auxiliary static contact under the action of the auxiliary contact compression spring, thereby reaching the closed position.
[0044] After the auxiliary contact assembly is closed, the first connecting rod can no longer rotate, and the force of the first main shaft pin on the first connecting rod continues to increase. When it is greater than the force of the slider torsion spring, the first connecting rod drives the slider to slide away from the circuit breaker main shaft, and the auxiliary moving contact remains in a closed state under the action of the auxiliary contact compression spring.
[0045] As the circuit breaker main shaft continues to rotate in its first direction, the first main shaft pin no longer applies force to the first mating paddle, and the first connecting rod slides toward the circuit breaker main shaft and abuts against the end wall of the shell opening groove under the action of the slider torsion spring, and the slider torsion spring presses the slider against the first connecting rod rotating shaft, and the auxiliary moving contact remains in a closed state under the action of the auxiliary contact compression spring.
[0046] As the circuit breaker main shaft continues to rotate in its first direction, the main contact assembly moves to its closed position, and when the second main shaft paddle acts on the second mating pin, the second main shaft paddle drives the first connecting rod to rotate around the first connecting rod rotation axis in a second direction opposite to its first direction, and the rotation of the first connecting rod drives the auxiliary moving contact to rotate toward its open position through the second connecting rod, and under the action of the auxiliary contact compression spring, the auxiliary moving contact moves to its open position after passing its dead point position.
[0047] When the circuit breaker main shaft continues to rotate in its first direction, and the force exerted by the second main shaft paddle on the second mating pin is greater than the pressure of the slider torsion spring, the first connecting rod drives the slider to slide away from the circuit breaker main shaft, and the auxiliary moving contact remains in the open state under the action of the auxiliary contact compression spring.
[0048] When the circuit breaker main shaft continues to rotate in its first direction, the second main shaft paddle no longer acts on the second mating pin, and the first connecting rod and the slider slide toward the circuit breaker main shaft under the force of the slider torsion spring, the slider abuts against the first connecting rod, and the auxiliary moving contact is maintained in its open position under the action of the auxiliary contact compression spring.
[0049] According to the above aspects of the present disclosure, when the driving mechanism of the circuit breaker drives the circuit breaker main shaft to rotate in a second direction opposite to its first direction, the second main shaft paddle will first act on the second mating pin, and then the first main shaft pin will act on the first mating paddle, and the main contact assembly will rotate from its closed position toward its open position until it reaches its open position. During this process, the auxiliary moving contact is always maintained in its open position under the action of the auxiliary contact compression spring.
[0050] According to the circuit breaker including the auxiliary contact assembly of the present disclosure, the first main shaft driving part and the second main shaft driving part of the circuit breaker main shaft act on the first matching part and the second matching part of the connecting rod assembly respectively to drive the auxiliary contact assembly, thereby achieving the pre-closing of the auxiliary contact before the main contact is closed and the pre-opening of the auxiliary contact before the main contact is opened.
[0051] Thus far, in order that the detailed description of the present disclosure herein can be better understood, and in order that the contribution of the present disclosure to the prior art can be better appreciated, the present disclosure has been fairly broadly outlined. Of course, embodiments of the present disclosure will be described below and will form the subject matter of the appended claims.
[0052] Likewise, those skilled in the art will recognize that the conception upon which the present disclosure is based can be easily used as the basis for designing other structures, methods and systems for implementing the several purposes of the present disclosure. Therefore, it is important that the appended claims should be considered to include such equivalent structures as long as they do not exceed the essence and scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0053] The following drawings will provide a better understanding of the present disclosure and more clearly demonstrate the advantages of the present disclosure. The drawings described herein are for illustrative purposes only of selected embodiments, not all possible implementations, and are not intended to limit the scope of the present disclosure.
[0054] Figure 1 A perspective schematic diagram showing a circuit breaker including an auxiliary contact assembly according to the present disclosure;
[0055] Figure 2 Shown as Figure 1 A three-dimensional schematic diagram of the interior of the circuit breaker shown;
[0056] Figure 3 to Figure 4 A perspective schematic diagram showing a circuit breaker main shaft according to the present disclosure;
[0057] Figure 5 A perspective schematic diagram showing a main contact assembly according to the present disclosure;
[0058] Figures 6 to 8 A perspective schematic diagram showing a first connecting rod according to the present disclosure;
[0059] Fig. 9 A perspective schematic diagram showing a slider according to the present disclosure;
[0060] Fig.10 A schematic diagram showing the assembly of a first connecting rod and a second connecting rod according to the present disclosure;
[0061] Fig.11 and Fig.12 A perspective schematic diagram showing a circuit breaker housing according to the present disclosure;
[0062] Fig.13 A three-dimensional schematic diagram showing an auxiliary moving contact according to the present disclosure;
[0063] Fig.14 A schematic diagram of assembling a first connecting rod, a second connecting rod and an auxiliary moving contact according to the present disclosure is shown, wherein a portion of the first connecting rod is simplified for the purpose of clarity;
[0064] Figures 15 to 21 The schematic process of the circuit breaker according to the present disclosure implementing the pre-closing of the auxiliary contact assembly before the closing of the main contact assembly and completing the opening of the auxiliary contact assembly after the closing of the main contact assembly is shown. DETAILED DESCRIPTION
[0065] The specific implementation methods according to the present disclosure are described in detail below in conjunction with the accompanying drawings.
[0066] like Figure 1 and Figure 2 As shown, a circuit breaker including an auxiliary contact assembly, wherein the circuit breaker includes a circuit breaker housing 1, a circuit breaker main shaft 2, a main contact assembly 3 and a connecting rod assembly 4.
[0067] The circuit breaker housing 1 rotatably supports the circuit breaker main shaft 2 .
[0068] The auxiliary contact assembly 5 is rotatably supported inside the circuit breaker housing 1 .
[0069] The connecting rod assembly 4 is connected between the circuit breaker main shaft 2 and the auxiliary contact assembly 5 .
[0070] The driving mechanism (not shown) of the circuit breaker can drive the rotation of the circuit breaker main shaft 2, and the rotation of the circuit breaker main shaft 2 can drive the main contact assembly 3 to rotate between its closing position and opening position.
[0071] The rotation of the circuit breaker main shaft 2 can act on the connecting rod assembly 4 and drive the auxiliary contact assembly 5 to rotate between its closed position and open position through the connecting rod assembly 4, so that the auxiliary contact assembly 5 is pre-closed before the main contact assembly 3 is closed and the auxiliary contact assembly 5 is opened after the main contact assembly 3 is closed.
[0072] like Figure 3 and Figure 4 As shown, a first main shaft driving part 2 - 1 and a second main shaft driving part 2 - 2 are provided on the outer circumferential surface of the circuit breaker main shaft 2 .
[0073] The first spindle drive unit 2-1 and the second spindle drive unit 2-2 are spaced apart from each other along the circumferential direction of the outer circumferential surface and the first spindle drive unit 2-1 and the second spindle drive unit 2-2 have different radial heights relative to the rotation axis of the circuit breaker main shaft 2, so that the first spindle drive unit 2-1 and the second spindle drive unit 2-2 will not act on the connecting rod assembly 4 at the same time.
[0074] When the circuit breaker main shaft 2 rotates in its first direction, the first main shaft drive part 2-1 can act on the connecting rod assembly 4 before the second main shaft drive part 2-2. When the circuit breaker main shaft 2 rotates in a second direction opposite to its first direction, the second main shaft drive part 2-2 can act on the connecting rod assembly 4 before the first main shaft drive part 2-1.
[0075] like Figure 3 and Figure 4 As shown, main shaft matching parts 2 - 3 are arranged on the two end faces of the circuit breaker main shaft 2 .
[0076] The main shaft matching portion 2-3 is connected to the main contact matching portion 3-1 (such as Figure 5 As shown in the figure, the rotation of the circuit breaker main shaft 3 can drive the main contact assembly 3 to rotate between its closed position and open position.
[0077] like Figure 3 and Figure 4As shown, the first spindle driving part 2-1 is a cylindrical first spindle pin, and the second spindle driving part 2-2 is a second spindle paddle.
[0078] like Figure 2 As shown, the connecting rod assembly 4 includes a first connecting rod 6 and a second connecting rod 7 .
[0079] One end of the second connecting rod 7 is connected to the first connecting rod 6 (see Fig.10 ).
[0080] The other end of the second connecting rod 7 is connected to the auxiliary contact assembly 5 (see Figure 2 ).
[0081] like Figures 6 to 8 As shown, the first connecting rod 6 includes a first connecting rod body 6-1, a first connecting rod rotating shaft 6-2, a first connecting rod connecting shaft 6-3, a first matching portion 6-4 and a second matching portion 6-5.
[0082] The first connecting rod rotating shaft 6 - 2 extends from both sides of the first connecting rod body 6 - 1 .
[0083] The first connecting rod connecting axis 6-3 is arranged parallel to the first connecting rod rotating axis 6-2.
[0084] The first matching portion 6 - 4 and the second matching portion 6 - 5 are provided on the first connecting rod body 6 - 1 and are respectively located on both sides of a rotation axis (not shown) of the first connecting rod rotation shaft 6 - 2 .
[0085] like Fig.11 and Fig.12 As shown, a slender housing opening slot 1-1 is provided on the circuit breaker housing 1. An opening slot opening 1-1-1 communicating with the housing opening slot 1-1 is provided on the housing opening slot 1-1.
[0086] A slider 8 (see FIG. Fig. 9 ).
[0087] The first connecting rod rotating shaft 6 - 2 can be slidably and rotatably engaged in the housing opening groove 1 - 1 .
[0088] A slider torsion spring 9 is also provided in the circuit breaker housing 1 , one end of the slider torsion spring 9 acts on the slider 8 through the opening 1 - 1 - 1 of the opening slot, and the other end of the slider torsion spring 9 acts on the circuit breaker housing 1 .
[0089] Under the action of the slider torsion spring 9, the slider 8 can abut against the first connecting rod rotating shaft 6-2.
[0090] like Fig. 9 As shown, a first matching portion 8-1 and a second matching portion 8-2 are provided on the slider 8, wherein the first matching portion 8-1 can be abutted against the outer circumferential surface of the first connecting rod rotating shaft 6-2, and one end of the slider torsion spring 9 acts on the second matching portion 8-2 of the slider, and the second matching portion 8-2 of the slider is, for example but not limited to, in the shape of a groove.
[0091] like Figures 6 to 8 As shown, the first mating portion 6 - 4 is a first mating paddle having an inclined surface 6 - 4 - 1 .
[0092] When the circuit breaker main shaft 2 rotates, the first main shaft pin can be slidably engaged on the inclined surface 6-4-1, so as to move the first engaging paddle, thereby allowing the first connecting rod 6 to rotate around the first connecting rod rotating axis 6-2.
[0093] The second matching portion 6 - 5 is a second matching pin in a cylindrical shape.
[0094] When the circuit breaker main shaft 2 rotates, the second main shaft paddle can act on the second matching pin, so that the first connecting rod 6 can rotate around its first connecting rod rotation axis 6-2.
[0095] like Figure 2 and Fig.14 As shown, the auxiliary contact assembly 5 includes an auxiliary moving contact 10 , an auxiliary static contact 11 and an auxiliary contact compression spring 12 .
[0096] like Fig.13 As shown, the auxiliary moving contact 10 includes an auxiliary moving contact rotating shaft 10 - 1 , and the auxiliary moving contact 10 is rotatably supported by the circuit breaker housing 1 through the auxiliary moving contact rotating shaft 10 - 1 .
[0097] The auxiliary static contact 11 is fixedly arranged on the circuit breaker housing 1 .
[0098] A moving contact 10 - 2 is provided on one end 10 - 4 of the auxiliary moving contact 10 , and the moving contact can be in contact with or separated from a stationary contact 11 - 1 provided on the auxiliary stationary contact 11 .
[0099] The acting force of the auxiliary contact compression spring 12 can act on the other end 10 - 5 of the auxiliary moving contact 10 .
[0100] The auxiliary moving contact 10 is also provided with an auxiliary moving contact connecting shaft 10 - 3 .
[0101] One end of the second connecting rod 7 is connected to the first connecting rod connecting shaft 6-3.
[0102] The other end of the second connecting rod 7 is connected to the auxiliary moving contact connecting shaft 10 - 3 .
[0103] In the length direction of the auxiliary moving contact 10, the auxiliary moving contact rotation axis 10-1 is located between the other end of the auxiliary moving contact 10 and the auxiliary moving contact connection axis 10-3.
[0104] exist Figures 1 to 14 Based on and combined with Figures 15 to 21 The process of completing the pre-closing of the auxiliary contact assembly before the closing of the main contact assembly and completing the opening of the auxiliary contact assembly after the closing of the main contact assembly is schematically described in detail according to the circuit breaker of the present disclosure.
[0105] When the driving mechanism of the circuit breaker drives the circuit breaker main shaft 2 in its first direction (in Figures 15 to 21 When the slider 8 rotates in the clockwise direction (in the middle), the slider torsion spring 9 acts on the slider 8, and the slider 8 is pressed against the first connecting rod rotating shaft toward the circuit breaker main shaft 2.
[0106] like Figure 15 to Figure 16 As shown, when the horizontal component force applied by the first main shaft pin on the first matching paddle is smaller than the horizontal component force applied by the slider torsion spring 9 on the first connecting rod rotating shaft 6-2, the slider will not slide, and the first main shaft pin drives the first connecting rod 6 to rotate around the first connecting rod rotating shaft 6-2 in its first direction (counterclockwise direction), and the first connecting rod 6 drives the second connecting rod 7, and then the second connecting rod 7 drives the auxiliary moving contact 10 to rotate around the auxiliary moving contact rotating shaft 10-1 toward the auxiliary static contact 11, and the auxiliary moving contact 10 continues to rotate toward the auxiliary static contact 11 under the action of the auxiliary contact compression spring 12, thereby reaching the closing position (see Fig.16 ). At this time, the main contact assembly 3 has not yet moved to its closing position.
[0107] like Fig.17 As shown, after the auxiliary contact assembly 5 is closed, the first connecting rod 6 can no longer rotate, and the force of the first main shaft pin on the first connecting rod continues to increase. When it is greater than the force of the slider torsion spring 9, the first connecting rod 6 drives the slider 8 to slide away from the circuit breaker main shaft 2, and the auxiliary moving contact 10 remains in the closed state under the action of the auxiliary contact compression spring 12. At this time, the main contact assembly 3 has not moved to its closed position.
[0108] like Fig.18As shown, as the circuit breaker main shaft 2 continues to rotate in its first direction, the first main shaft pin no longer applies force to the first mating paddle, and the first connecting rod 6 slides toward the circuit breaker main shaft 2 under the action of the slider torsion spring 9 and abuts against the end wall of the housing opening slot 1-1 (the end wall close to the circuit breaker main shaft 2), and the slider torsion spring 9 presses the slider 2 against the first connecting rod rotating shaft 6-2, and the auxiliary moving contact 10 maintains the closed state under the action of the auxiliary contact compression spring 12. At this time, the main contact assembly 3 has not moved to its closed position.
[0109] As the circuit breaker main shaft 2 continues to rotate in its first direction, the main contact assembly 3 moves to its closed position. When the second main shaft paddle acts on the second matching pin, the second main shaft paddle drives the first connecting rod 6 to rotate around the first connecting rod rotating axis 6-2 in a second direction (clockwise) opposite to its first direction. The rotation of the first connecting rod 6 drives the auxiliary moving contact 10 to rotate toward its open position through the second connecting rod 7. Under the action of the auxiliary contact compression spring 12, the auxiliary moving contact 10 moves to its open position after passing through its dead point position (see Fig.19 ).
[0110] When the circuit breaker main shaft 2 continues to rotate in its first direction, when the force of the second main shaft paddle acting on the second matching pin is greater than the pressure of the slider torsion spring 9, the first connecting rod 6 drives the slider 8 to slide away from the circuit breaker main shaft 2, and the auxiliary moving contact 10 remains in the open state under the action of the auxiliary contact compression spring 12 (see Fig. 20 ).
[0111] like Fig.21 As shown, when the circuit breaker main shaft 2 continues to rotate in its first direction, the second main shaft paddle no longer acts on the second mating pin, and the first connecting rod 6 and the slider 8 slide toward the circuit breaker main shaft 2 under the force of the slider torsion spring 9, the slider 8 abuts against the first connecting rod 6, and the auxiliary moving contact 10 is maintained in its open position under the action of the auxiliary contact compression spring 12.
[0112] When the driving mechanism of the circuit breaker drives the circuit breaker main shaft 2 to rotate in a second direction opposite to its first direction (not shown), the second main shaft paddle will first act on the second mating pin, and then the first main shaft pin will act on the first mating paddle, and the main contact assembly 3 will rotate from its closed position toward its open position until it reaches its open position. During this process, the auxiliary moving contact 10 is always maintained in its open position under the action of the auxiliary contact compression spring 12.
[0113] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the embodiments.
[0114] Even though particular combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various embodiments. In fact, many of these features may be combined in ways not specifically recited in the claims and / or disclosed in the specification. Although each dependent claim listed below may only directly depend on one claim, the disclosure of the various embodiments includes each dependent claim in combination with every other claim in the claim set.
Claims
1. A circuit breaker including an auxiliary contact assembly, wherein the circuit breaker includes a circuit breaker housing, a circuit breaker main shaft, a main contact assembly and a connecting rod assembly; The circuit breaker housing rotatably supports the circuit breaker main shaft; The auxiliary contact assembly is rotatably supported inside the circuit breaker housing; The connecting rod assembly is connected between the circuit breaker main shaft and the auxiliary contact assembly; The driving mechanism of the circuit breaker can drive the rotation of the main shaft of the circuit breaker, and the rotation of the main shaft of the circuit breaker can drive the main contact assembly to rotate between its closed position and open position; The rotation of the circuit breaker main shaft can act on the connecting rod assembly and drive the auxiliary contact assembly to rotate between its closed position and open position through the connecting rod assembly, so that the auxiliary contact assembly is pre-closed before the main contact assembly is closed and the auxiliary contact assembly is opened after the main contact assembly is closed.
2. The circuit breaker according to claim 1, wherein A first main shaft driving portion and a second main shaft driving portion are provided on the outer circumferential surface of the circuit breaker main shaft; The first main shaft drive portion and the second main shaft drive portion are spaced apart from each other along the circumferential direction of the outer circumferential surface and have different radial heights relative to the rotation axis of the circuit breaker main shaft, so that the first main shaft drive portion and the second main shaft drive portion do not act on the connecting rod assembly at the same time.
3. The circuit breaker according to claim 2, wherein When the circuit breaker main shaft rotates in its first direction, the first main shaft drive portion is capable of acting on the connecting rod assembly before the second main shaft drive portion; When the circuit breaker main shaft rotates in a second direction opposite to the first direction, the second main shaft driving portion can act on the connecting rod assembly before the first main shaft driving portion.
4. The circuit breaker according to claim 2, wherein Main shaft matching parts are arranged on two end surfaces of the circuit breaker main shaft; The main shaft matching portion matches with the main contact matching portion provided on the main contact assembly, so that the rotation of the circuit breaker main shaft can drive the main contact assembly to rotate between its closing position and opening position.
5. The circuit breaker according to claim 3, wherein The first spindle driving portion is a first spindle pin in a cylindrical shape; The second spindle driving part is a second spindle paddle.
6. The circuit breaker according to claim 5, wherein The connecting rod assembly includes a first connecting rod and a second connecting rod; One end of the second connecting rod is connected to the first connecting rod; The other end of the second link is connected to the auxiliary contact assembly.
7. The circuit breaker according to claim 6, wherein The first connecting rod comprises a first connecting rod body, a first connecting rod rotating shaft, a first connecting rod connecting shaft, a first matching portion and a second matching portion; The first connecting rod rotation axis extends from both sides of the first connecting rod body; The first connecting rod connecting axis is arranged parallel to the first connecting rod rotating axis; The first matching portion and the second matching portion are arranged on the first connecting rod body and are respectively located on both sides of the rotation axis of the first connecting rod rotation shaft.
8. The circuit breaker according to claim 7, wherein A housing opening slot in an elongated shape is provided on the circuit breaker housing; A sliding block capable of sliding therein is arranged in the opening groove of the shell; The first connecting rod rotating shaft can be slidably and rotatably fitted in the housing opening groove; A slider torsion spring is also provided in the circuit breaker housing, one end of the slider torsion spring acts on the slider, and the other end of the slider torsion spring acts on the circuit breaker housing; Under the action of the slider torsion spring, the slider can abut against the first connecting rod rotation axis.
9. The circuit breaker according to claim 8, wherein The first mating portion is a first mating paddle having an inclined surface; When the circuit breaker main shaft rotates, the first main shaft pin can be slidably engaged on the inclined surface, so as to move the first engaging paddle, thereby enabling the first connecting rod to rotate around the first connecting rod rotation axis; The second matching portion is a second matching pin in a cylindrical shape; When the circuit breaker main shaft rotates, the second main shaft paddle can act on the second matching pin, so that the first connecting rod can rotate around the first connecting rod rotation axis.
10. The circuit breaker according to claim 9, wherein The auxiliary contact assembly comprises an auxiliary moving contact, an auxiliary static contact and an auxiliary contact compression spring; The auxiliary moving contact comprises an auxiliary moving contact rotating shaft, and the auxiliary moving contact is rotatably supported by the circuit breaker housing through the auxiliary moving contact rotating shaft; The auxiliary static contact is fixedly arranged on the circuit breaker housing; A moving contact is provided on one end of the auxiliary moving contact, and the moving contact can contact or separate with a stationary contact provided on the auxiliary stationary contact; The acting force of the auxiliary contact compression spring can act on the other end of the auxiliary moving contact.
11. The circuit breaker according to claim 10, wherein The auxiliary moving contact also includes an auxiliary moving contact connecting shaft; One end of the second connecting rod is connected to the first connecting rod connecting shaft; The other end of the second connecting rod is connected to the auxiliary moving contact connecting shaft; In the length direction of the auxiliary moving contact, the auxiliary moving contact rotation axis is located between the other end of the auxiliary moving contact and the auxiliary moving contact connection axis.
12. The circuit breaker according to claim 11, wherein When the driving mechanism of the circuit breaker drives the circuit breaker main shaft to rotate in its first direction, the slider torsion spring acts on the slider, and the slider presses against the first connecting rod rotating shaft toward the circuit breaker main shaft; When the horizontal component force applied by the first main shaft pin on the first matching paddle is smaller than the horizontal component force applied by the slider torsion spring on the first connecting rod rotation axis, the slider will not slide, the first main shaft pin drives the first connecting rod to rotate around the first connecting rod rotation axis in its first direction, the first connecting rod drives the second connecting rod, and then the second connecting rod drives the auxiliary moving contact to rotate around the auxiliary moving contact rotation axis toward the auxiliary static contact, and the auxiliary moving contact continues to rotate toward the auxiliary static contact under the action of the auxiliary contact compression spring, thereby reaching the closing position; After the auxiliary contact assembly is closed, the first connecting rod cannot continue to rotate, and the force of the first main shaft pin on the first connecting rod continues to increase. When it is greater than the force of the slider torsion spring, the first connecting rod drives the slider to slide away from the circuit breaker main shaft, and the auxiliary moving contact remains in the closed state under the action of the auxiliary contact compression spring; As the circuit breaker main shaft continues to rotate in the first direction, the first main shaft pin no longer applies force to the first matching paddle, and the first connecting rod slides toward the circuit breaker main shaft under the action of the slider torsion spring and abuts against the end wall of the housing opening slot, and the slider torsion spring presses the slider against the first connecting rod rotating shaft, and the auxiliary moving contact is kept in a closed state under the action of the auxiliary contact compression spring; As the circuit breaker main shaft continues to rotate in its first direction, the main contact assembly moves to its closed position, and when the second main shaft paddle acts on the second matching pin, the second main shaft paddle drives the first connecting rod to rotate around the first connecting rod rotation axis in a second direction opposite to its first direction, and the rotation of the first connecting rod drives the auxiliary moving contact to rotate toward its open position through the second connecting rod, and the auxiliary moving contact moves to its open position after passing through its dead point position under the action of the auxiliary contact compression spring; When the circuit breaker main shaft continues to rotate in the first direction, and the force of the second main shaft paddle on the second matching pin is greater than the pressure of the slider torsion spring, the first connecting rod drives the slider to slide away from the circuit breaker main shaft, and the auxiliary moving contact remains in the open state under the action of the auxiliary contact compression spring; When the circuit breaker main shaft continues to rotate in its first direction, the second main shaft paddle no longer acts on the second mating pin, and the first connecting rod and the slider slide toward the circuit breaker main shaft under the force of the slider torsion spring, the slider abuts against the first connecting rod, and the auxiliary moving contact is maintained in its open position under the action of the auxiliary contact compression spring.
13. The circuit breaker according to claim 11, wherein When the driving mechanism of the circuit breaker drives the circuit breaker main shaft to rotate in a second direction opposite to its first direction, the second main shaft paddle will first act on the second mating pin, and then the first main shaft pin will act on the first mating paddle, and the main contact assembly will rotate from its closed position toward its open position until it reaches its open position. During this process, the auxiliary moving contact is always maintained in its open position under the action of the auxiliary contact compression spring.