A circuit breaker

Abstract

The application relates to the technical field of circuit breakers, in particular to a circuit breaker. The circuit breaker comprises a circuit breaker shell, an electric mechanism, a gear assembly, a lock catch and a trip lever. The electric mechanism is fixed in the circuit breaker shell. The gear assembly is arranged in the circuit breaker shell and is in transmission connection with the electric mechanism. The lock catch is rotatably connected with the circuit breaker shell and has a first position for forward rotation to make the circuit breaker close and a second position for reverse rotation to make the circuit breaker open. One end of the trip lever is rotatably connected with the gear assembly, and the other end is suitable for driving the lock catch to reversely rotate to the second position. The circuit breaker provided by the application has simple structure and can rapidly trip and open.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, and more specifically to a circuit breaker. Background Technology

[0002] Circuit breakers are one of the most important electrical components in the electrical field, used to connect and disconnect current. When an overload or short circuit fault occurs in the circuit, the tripping mechanism trips, driving the operating mechanism to open the circuit, thereby protecting the power supply lines and electric mechanisms, as well as other lines or equipment.

[0003] In a current miniature circuit breaker, the closing mechanism uses an electric mechanism to drive a worm gear, which in turn drives a sector-shaped closing gear to complete the closing operation. However, when the automatic closing mechanism begins the tripping operation, a push-pull electromagnet is fixed to its housing. When the electromagnet coil is energized, the electromagnet core pushes the trip lever, which in turn triggers the tripping mechanism on the circuit breaker to complete the tripping action. After the tripping action is completed, the push-pull electromagnet core returns to its original position, and the trip lever also returns to its original position. This closing mechanism is relatively complex and costly, and because the opening and closing operations are accomplished through different structures, the circuit breaker's tripping process is complex and time-consuming. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the circuit breaker in the prior art, which has a relatively complex opening and closing mechanism and a relatively complex and time-consuming tripping process, so as to provide a circuit breaker with a simple structure and a fast tripping process.

[0005] To address the aforementioned problems, the present invention provides a circuit breaker, comprising a circuit breaker housing, an electric mechanism, a gear assembly, a latch, and a trip lever; the electric mechanism is fixed within the circuit breaker housing; the gear assembly is disposed within the circuit breaker housing and is drively connected to the electric mechanism; the latch is rotatably connected to the circuit breaker housing, having a first position for forward rotation to close the circuit breaker and a second position for reverse rotation to open the circuit breaker; one end of the trip lever is rotatably connected to the gear assembly, and the other end is adapted to drive the latch to rotate in the reverse direction to the second position.

[0006] The circuit breaker provided by the present invention further includes a relief groove disposed on the gear assembly. One end of the tripping rod is slidably disposed in the relief groove and is adapted to slide along the relief groove when the latch rotates in the forward direction. The other end of the tripping rod is adapted to drive the latch to rotate in the reverse direction under the drive of the groove wall of the relief groove.

[0007] The circuit breaker provided by the present invention includes a tripping rod comprising a first rod body, a second rod body, and a third rod body; one end of the first rod body is slidably disposed in the relief groove; one end of the second rod body is connected to the other end of the first rod body; one end of the third rod body is connected to the other end of the second rod body, and the side of the other end is adapted to abut against the latch.

[0008] The circuit breaker provided by the present invention has a third pole body located on the same side of the second pole body as the first pole body and perpendicular to the second pole body.

[0009] The circuit breaker provided by the present invention has a latch that is rotatably connected to the circuit breaker housing, and a hook is provided at one end. The side of the third rod is adapted to abut against the hook.

[0010] The circuit breaker provided by the present invention includes a gear assembly comprising a first transmission gear and a second transmission gear; the first transmission gear is connected to the drive shaft of the electric mechanism; the second transmission gear meshes with the first transmission gear and is connected to the push-button mechanism.

[0011] The circuit breaker provided by the present invention includes a second transmission gear comprising a third gear and a fourth gear coaxially connected, wherein the diameter of the third gear is larger than the diameter of the fourth gear, the third gear meshes with the first transmission gear, and the fourth gear is connected to a push-button mechanism.

[0012] The circuit breaker provided by the present invention has a relief groove located on the end face of the third gear away from the fourth gear, and one end of the first rod is slidably disposed in the relief groove and rotatably connected to the third gear.

[0013] The circuit breaker provided by the present invention has a relief groove that is a circular arc groove coaxial with the third gear.

[0014] The circuit breaker provided by the present invention includes a first transmission gear comprising a first gear and a second gear coaxially connected, wherein the diameter of the first gear is larger than the diameter of the second gear, and the second gear meshes with the third gear; a helical gear is provided on the outer periphery of the drive shaft of the electric mechanism, and the helical gear meshes with the first gear.

[0015] The present invention has the following advantages: 1. The circuit breaker provided by the present invention includes a circuit breaker housing, an electric mechanism, a gear assembly, a latch, and a trip lever; the electric mechanism is fixed inside the circuit breaker housing; the gear assembly is disposed inside the circuit breaker housing and is drivenly connected to the electric mechanism; the latch is rotatably connected to the circuit breaker housing and has a first position for forward rotation to close the circuit breaker and a second position for reverse rotation to open the circuit breaker; one end of the trip lever is rotatably connected to the gear assembly, and the other end is adapted to drive the latch to rotate in the reverse direction to the second position.

[0016] The electric mechanism drives the gear assembly to rotate counterclockwise, which in turn moves the trip lever closer to the latch. The latch, pushed by the trip lever, rotates clockwise to the second position, thus achieving the purpose of tripping and opening the circuit breaker. By directly driving the latch to rotate with the trip lever, the circuit breaker's tripping and opening function is achieved, simplifying the structure for tripping on the circuit breaker, simplifying the tripping and opening process, shortening the tripping time, and extending the service life of the contacts.

[0017] 2. The circuit breaker provided by the present invention further includes a relief groove disposed on the gear assembly. One end of the tripping rod is slidably disposed in the relief groove and is adapted to slide along the relief groove when the latch rotates in the forward direction. The other end of the tripping rod is adapted to drive the latch to rotate in the reverse direction under the drive of the groove wall of the relief groove.

[0018] When the circuit breaker closes, the gear assembly rotates clockwise, and the latch rotates in the forward direction. At this time, one end of the trip rod slides along the clearance groove to avoid affecting the rotation of the gear assembly or the latch. When the circuit breaker opens, the gear assembly rotates counterclockwise, and the groove wall at one end of the clearance groove abuts against one end of the trip rod, driving the trip rod to move so that the other end of the trip rod can abut against the latch, driving the latch to rotate in the reverse direction, thus tripping the circuit breaker. The clockwise rotation of the gear assembly refers to the gear assembly... Figure 1 Rotate clockwise from the perspective shown.

[0019] 3. The circuit breaker provided by the present invention has a latch that is rotatably connected to the circuit breaker housing, one end of which is provided with a hook, and the side of the third rod is adapted to abut against the hook.

[0020] When the third rod comes into contact with the latch, the hook prevents the third rod from sliding and avoids its position relative to the latch, making the structure more stable. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A partial structural schematic diagram of the circuit breaker of the present invention is shown; Figure 2 A schematic diagram of the specific structure of the release lever of the present invention is shown.

[0023] Explanation of reference numerals in the attached figures: 1. Circuit breaker housing; 2. Electric mechanism; 3. Tripping lever; 31. First lever; 32. Second lever; 33. Third lever; 4. Lock; 5. First gear; 6. Second gear; 7. Third gear; 8. Hook; 9. Button mechanism; 91. Third transmission gear; 92. Connecting rod; 93. Button; 10. Helical gear; 11. Relief groove. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figures 1 to 2As shown, this embodiment discloses a circuit breaker, including a circuit breaker housing 1, an electric mechanism 2, a gear assembly, a latch 4, and a trip lever 3; the electric mechanism 2 is fixed inside the circuit breaker housing 1; the gear assembly is disposed inside the circuit breaker housing 1 and is drivenly connected to the electric mechanism 2; the latch 4 is rotatably connected to the circuit breaker housing 1, having a first position for forward rotation to close the circuit breaker and a second position for reverse rotation to open the circuit breaker; one end of the trip lever 3 is rotatably connected to the gear assembly, and the other end is adapted to drive the latch 4 to rotate in the reverse direction to the second position.

[0029] In a specific implementation, the electric mechanism 2 drives the gear assembly to rotate counterclockwise, which in turn moves the trip lever 3 towards the latch 4. The latch 4, pushed by the trip lever 3, rotates clockwise to the second position, thus achieving the purpose of tripping and opening the circuit breaker. By directly driving the latch 4 to rotate via the trip lever 3, the circuit breaker's tripping and opening function is achieved, simplifying the structure for achieving the opening function on the circuit breaker, simplifying the tripping and opening process, shortening the tripping time, and extending the service life of the contacts.

[0030] It should be noted that counterclockwise rotation of the gear assembly refers to the gear assembly rotating in a certain direction. Figure 1 The rotation is counterclockwise from the perspective shown. Forward rotation refers to the end of the latch 4 closest to the release lever 3 rotating towards the release lever 3; reverse rotation refers to the end of the latch 4 closest to the release lever 3 rotating away from the release lever 3. Figure 1 As shown, a forward rotation corresponds to the latch 4 in the diagram. Figure 1 From the perspective shown, rotating counterclockwise results in the latch 4 in the diagram rotating counterclockwise. Figure 1 When rotated clockwise from the perspective shown, when the latch 4 is in the first position, one end of the latch 4 is close to the release lever 3.

[0031] The circuit breaker in this embodiment also includes a relief groove 11 disposed on the gear assembly. One end of the tripping rod 3 is slidably disposed in the relief groove 11 and is adapted to slide along the relief groove 11 when the latch 4 rotates in the forward direction. The other end of the tripping rod 3 is adapted to drive the latch 4 to rotate in the reverse direction under the drive of the groove wall of the relief groove 11.

[0032] When the circuit breaker closes, the gear assembly rotates clockwise, and the latch 4 rotates in the forward direction. At this time, one end of the trip rod 3 slides along the relief groove 11 to avoid affecting the rotation of the gear assembly or the latch 4. When the circuit breaker opens, the gear assembly rotates counterclockwise, and the groove wall at one end of the relief groove 11 abuts against one end of the trip rod 3, driving the trip rod 3 to move so that the other end of the trip rod 3 can abut against the latch 4, driving the latch 4 to rotate in the reverse direction, thus enabling the circuit breaker to trip and open. The clockwise rotation of the gear assembly refers to the gear assembly in... Figure 1 Rotate clockwise from the perspective shown.

[0033] In this embodiment, the circuit breaker's tripping lever 3 includes a first lever 31, a second lever 32, and a third lever 33. One end of the first lever 31 is slidably disposed within the clearance groove 11. One end of the second lever 32 is connected to the other end of the first lever 31. One end of the third lever 33 is connected to the other end of the second lever 32, and the side of the other end is adapted to abut against the latch 4. The first lever 31 and the third lever 33 can compensate for the height difference between the gear assembly and the latch 4 relative to the circuit breaker housing 1.

[0034] In this embodiment of the circuit breaker, the third rod 33 and the first rod 31 are located on the same side of the second rod 32 and are perpendicular to the second rod 32. After installation, the second rod 32 can be arranged parallel to the circuit breaker housing 1 and slidably engaged to limit the sliding of the second rod 32. Specifically, the height of the first rod 31 protruding from the second rod 32 is less than the height of the third rod 33 protruding from the second rod 32.

[0035] In this embodiment, the circuit breaker has a latch 4 that is rotatably connected to the circuit breaker housing 1, and a hook 8 is provided at one end. The side of the third rod 33 is adapted to abut against the hook 8.

[0036] When the third rod 33 abuts against the latch 4, the hook 8 prevents the third rod 33 from sliding and avoids its position from shifting relative to the latch 4, making its structure more stable.

[0037] In a specific implementation, the other end of the latch 4 is rotatably connected to the circuit breaker housing 1 and fixedly connected to the moving contact. When the third rod 33 abuts against the hook 8 and drives the latch 4 to rotate in the opposite direction relative to the circuit breaker housing 1, the moving contact also rotates in the opposite direction relative to the circuit breaker housing 1 and separates from the stationary contact, thereby realizing the opening of the circuit breaker.

[0038] In this embodiment, the circuit breaker's gear assembly includes a first transmission gear and a second transmission gear; the first transmission gear is connected to the drive shaft of the electric mechanism 2; the second transmission gear meshes with the first transmission gear and is connected to the button mechanism 9.

[0039] In this embodiment, the circuit breaker has a second transmission gear comprising a third gear 7 and a fourth gear coaxially connected. The diameter of the third gear 7 is larger than the diameter of the fourth gear. The third gear 7 meshes with the first transmission gear, and the fourth gear is connected to the push-button mechanism 9.

[0040] In a specific implementation, the second transmission gear is a compound gear, and the third gear 7 and the fourth gear rotate coaxially.

[0041] Alternatively, the second transmission gear can be a single-layer gear that meshes with the first transmission gear and is connected to the button mechanism 9 in a transmission manner.

[0042] In this embodiment of the circuit breaker, the relief groove 11 is located on the end face of the third gear 7 away from the fourth gear, and one end of the first rod 31 is slidably disposed in the relief groove 11 and is rotatably connected to the third gear 7.

[0043] In this embodiment of the circuit breaker, the clearance groove 11 is an arc groove coaxial with the third gear 7. During the clearance function of the clearance groove 11, one end of the tripping rod 3 will not interfere with the groove wall of the clearance groove 11, nor will it be moved by the clearance groove 11.

[0044] In this embodiment, the circuit breaker has a first transmission gear including a first gear 5 and a second gear 6 coaxially connected. The diameter of the first gear 5 is larger than the diameter of the second gear 6, and the second gear 6 meshes with the third gear 7. The outer periphery of the drive shaft of the electric mechanism 2 is provided with a helical gear 10, which meshes with the first gear 5.

[0045] like Figure 1 As shown, when the helical gear 10 drives the first gear 5 to rotate clockwise relative to the circuit breaker housing 1, the second gear 6 drives the third gear 7 to rotate counterclockwise relative to the circuit breaker housing 1, causing the groove wall at one end of the positioning groove 11 to abut against one end of the trip rod 3, thus moving the trip rod 3 to the position where it abuts against the latch 4. The third gear 7 continues to rotate, causing the groove wall of the positioning groove 11 to push the latch 4 to rotate clockwise, causing the moving contact to separate from the stationary contact. At this time, the latch 4 is in the second position, realizing the tripping and opening of the circuit breaker.

[0046] The button mechanism 9 consists of a third transmission gear 91, a connecting rod 92, and a button 93. The third transmission gear 91 meshes with the fourth gear, and the button 93 slides with the circuit breaker housing 1 and is connected to the third transmission gear 91 via the connecting rod 92. When the second gear 6 drives the third gear 7 to rotate counterclockwise relative to the circuit breaker housing 1, the third transmission gear 91 rotates clockwise under the drive of the fourth gear, and pushes the button 93 to move away from the circuit breaker housing 1 via the connecting rod 92.

[0047] In a specific implementation, the first transmission gear is a compound gear, and the first gear 5 and the second gear 6 rotate coaxially. The plane containing the end face of the third gear 7 is separate from the plane containing the end face of the first gear 5, reducing the frictional force generated when the end faces of the gears come into contact during rotation.

[0048] As an alternative implementation, the first transmission gear may be a single-layer gear that meshes with the third gear 7 and with the helical gear 10 of the electric mechanism 2.

[0049] As an alternative implementation, both the first and second transmission gears can be single-layer gears, with the first and second transmission gears meshing together, and the first transmission gear meshing with the helical gear 10 of the electric mechanism 2, while the second transmission gear meshes with the third transmission gear 91.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A circuit breaker, characterized in that, include: Circuit breaker housing (1); The electric mechanism (2) is fixed inside the circuit breaker housing (1); A gear assembly is disposed inside the circuit breaker housing (1) and is connected to the electric mechanism (2) for transmission. The latch (4) is rotatably connected to the circuit breaker housing (1) and has a first position for forward rotation to close the circuit breaker and a second position for reverse rotation to open the circuit breaker. The release lever (3) is rotatably connected at one end to the gear assembly and at the other end is adapted to drive the latch (4) to rotate in the opposite direction to the second position; It also includes a relief groove (11) disposed on the gear assembly. One end of the release rod (3) is slidably disposed in the relief groove (11) and is adapted to slide along the relief groove (11) when the latch (4) rotates in the forward direction. The other end of the release rod (3) is adapted to drive the latch (4) to rotate in the reverse direction under the drive of the groove wall of the relief groove (11). The first rod (31) is slidably disposed at one end in the relief groove (11); The second rod (32) is connected at one end to the other end of the first rod (31); The third rod (33) has one end connected to the other end of the second rod (32), and the side of the other end is adapted to abut against the latch (4); The latch (4) is rotatably connected to the circuit breaker housing (1), and one end is provided with a hook (8). The side of the third rod (33) is adapted to abut against the hook (8).

2. The circuit breaker according to claim 1, characterized in that, The third rod (33) is located on the same side of the second rod (32) as the first rod (31) and is perpendicular to the second rod (32).

3. The circuit breaker according to any one of claims 1-2, characterized in that, The gear assembly includes: The first transmission gear is connected to the drive shaft of the electric mechanism (2); The second transmission gear meshes with the first transmission gear and is connected to the button mechanism (9) in a transmission connection.

4. The circuit breaker according to claim 3, characterized in that, The second transmission gear includes a third gear (7) and a fourth gear connected coaxially. The diameter of the third gear (7) is larger than the diameter of the fourth gear. The third gear (7) meshes with the first transmission gear, and the fourth gear is connected to the button mechanism (9) in a transmission connection.

5. The circuit breaker according to claim 4, characterized in that, The clearance groove (11) is located on the end face of the third gear (7) away from the fourth gear. One end of the first rod (31) is slidably disposed in the clearance groove (11) and is rotatably connected to the third gear (7).

6. The circuit breaker according to claim 5, characterized in that, The clearance groove (11) is a circular arc groove coaxial with the third gear (7).

7. The circuit breaker according to any one of claims 4-6, characterized in that, The first transmission gear includes a first gear (5) and a second gear (6) connected coaxially. The diameter of the first gear (5) is larger than the diameter of the second gear (6). The second gear (6) meshes with the third gear (7). A helical gear (10) is provided on the outer periphery of the drive shaft of the electric mechanism (2). The helical gear (10) meshes with the first gear (5).

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