Circuit breaker

Abstract

The utility model discloses a circuit breaker, and the circuit breaker comprises a handle which is configured to rotate and move around a first axis, so as to drive a moving contact to move, and correspondingly enable the circuit breaker to be switched between a switching-off state and a switching-on state; the electric operating system comprises a motor; a crank coupled to the motor, the crank configured to rotationally move about a second axis, the second axis being perpendicular to the first axis; the first end of the connecting rod is connected to the crank, the connecting rod is configured to move in a plane perpendicular to the second axis under the driving of the crank, and the second end of the connecting rod is provided with a first through hole; the driving part comprises a first part and a second part which extend in the second direction and the first direction respectively, the first part is fixed to the second part, the first part is sleeved with the first through hole to be driven by the connecting rod, and the second part is connected to the handle to drive the handle.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, and more specifically, to a circuit breaker with an optimized electric operating mechanism. Background Technology

[0002] The circuit breaker controls the movement of its moving contacts by moving a handle, thereby switching the circuit breaker between the closed and open states. The handle can be controlled by an electric operating mechanism, but in current technology, the reliability of electric operating mechanisms is insufficient and their cost is high.

[0003] Therefore, it is desirable to propose a circuit breaker that improves upon the shortcomings of existing technologies. Utility Model Content

[0004] According to one aspect of the present invention, a circuit breaker is provided, comprising: a handle configured to rotate and move between a first position and a second position about a first axis to drive a moving contact to move between an open position and a closed position, thereby correspondingly switching the circuit breaker between an open state and a closed state; an electric operating system comprising: a motor; a crank connected to the motor, the crank configured to rotate and move about a second axis perpendicular to the first axis; a connecting rod, the first end of the connecting rod being connected to the crank, the connecting rod being configured to move in a plane perpendicular to the second axis under the drive of the crank, the second end of the connecting rod being provided with a first through hole; and a driving member comprising a first portion and a second portion extending along a second direction and a first direction respectively, the first portion being fixed to the second portion, the first direction and the second direction being parallel to the first axis and the second axis respectively, the first portion being sleeved in the first through hole to be driven by the connecting rod, and the second portion being connected to the handle to drive the handle.

[0005] According to this scheme, the transmission process of the electric operating mechanism is made more reliable and the cost of the electric operating mechanism is reduced by using a drive chain of crank-connecting rod-drive component-handle.

[0006] In some designs, the first part can be configured to be movable relative to the link in a second direction.

[0007] In some designs, the sidewall of the first through hole can be formed of a friction-resistant material.

[0008] According to this scheme, the wear of the drive component in the first through hole can be reduced.

[0009] In some embodiments, the handle may include a driven part having a second through hole, and a second part being fitted into the second through hole to enable a drive member to drive the handle.

[0010] In some designs, the driven part is able to rotate and move around the second part.

[0011] In some designs, the second axis may pass through the first end of the crank, and the second end of the crank, opposite to the first end, may be connected to the connecting rod.

[0012] In some designs, the connecting rod may have a body and an extension protruding from a first end of the body in a second direction, the extension having a third through hole, and the second end of the crank having a protrusion that inserts into the third through hole.

[0013] According to this scheme, the protrusion is inserted into the third through hole to ensure that the connecting rod will not tilt and deviate from the designed motion plane.

[0014] In some designs, the electric operating system may also include a transmission assembly comprising multiple gears, configured to transmit power from the motor to the crank.

[0015] In some designs, the crank may have a slot extending along a second axis, and the electric operating system may be configured to be manually operated via the slot.

[0016] In some designs, the gear connected to the crank can be an incomplete gear.

[0017] According to this scheme, when manual operation is performed, the gear connected to the crank disengages from other gears upstream of the transmission chain, thus making manual operation unaffected by the motor drive. Attached Figure Description

[0018] Figure 1 A schematic diagram of a circuit breaker according to an embodiment of the present invention is shown;

[0019] Figure 2 A top view of a circuit breaker according to an embodiment of the present invention is shown, wherein the circuit breaker is in the open state;

[0020] Figure 3 A top view of a circuit breaker according to an embodiment of the present invention is shown, wherein the circuit breaker is in an intermediate state;

[0021] Figure 4 A top view of a circuit breaker according to an embodiment of the present invention is shown, wherein the circuit breaker is in the closed state;

[0022] Figure 5 A front view of a circuit breaker according to an embodiment of the present invention is shown;

[0023] Figure 6 A partial schematic diagram of the electric operating system according to the present invention is shown.

[0024] Figure Labels

[0025] 1. Circuit breaker

[0026] 10 Handles

[0027] 12 Driven Parts

[0028] 100 Electric Operating System

[0029] 110 motor

[0030] 120 transmission system

[0031] 122 First Gear

[0032] 124 Second Gear

[0033] 130 crank

[0034] 132 First End

[0035] 134 Second End

[0036] 135 protrusion

[0037] 136 slots

[0038] 140 linkage

[0039] 141 Main Body

[0040] 142 First End

[0041] 143 Extension

[0042] 144 Second End

[0043] 150 drive unit

[0044] 152 Part 1

[0045] 154 Part Two Detailed Implementation

[0046] To make the objectives, solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0047] For clarity, unless otherwise explicitly stated, the directional terms used in this document are defined as follows: the first direction is parallel to the axis around which the handle rotates, the second direction is parallel to the axis around which the crank rotates, and the first direction is perpendicular to the second direction.

[0048] Figure 1A schematic diagram of a circuit breaker 1 according to an embodiment of the present invention is shown. The circuit breaker 1 includes a handle 10, which is configured to rotate about a first axis between a first position and a second position (e.g., as shown in the diagram). Figure 5 and Figure 6 As shown, the handle 10 rotates in a vertical plane to move the moving contact (not shown) between the open and closed positions, thereby switching the circuit breaker 1 between the open and closed states. The circuit breaker 1 also includes an electric operating system 100, which controls the movement of the handle 10, thereby controlling the open and closed states of the circuit breaker 1.

[0049] like Figure 5 and Figure 6 As shown, the electric operating system 100 mainly includes a motor 110, a transmission system 120, a crank 130, a connecting rod 140, and a drive unit 150. The power output by the motor 110 is transmitted to the handle 10 in sequence through the transmission system 120, the crank 130, the connecting rod 140, and the drive unit 150, thereby driving the handle 10 to move between the open and closed positions when the motor 110 is running.

[0050] The transmission system 120 may include a first gear 122 and a second gear 124. The first gear 122 and the second gear 124 are externally meshed, and the power output from the motor 110 is transmitted to the crank 130 sequentially via the first gear 122 and the second gear 124. The number of teeth on the first gear 122 is less than the number of teeth on the second gear 124, thereby achieving the effect of reducing the speed of the motor 110 and increasing the torque. It should be understood that, although Figure 5 Two gears are shown, but this invention is not intended to limit the number of gears included in the transmission system 120, nor is it intended to limit parameters such as the number of teeth on the gears. Instead, any suitable type and number of gears can be selected according to actual application requirements to achieve the required transmission ratio from the output shaft of the motor 110 to the crank 130.

[0051] Crank 130 has a handle-like shape, with a first end 132 and a second end 134 opposite to the first end 132. Crank 130 is configured to rotate about a second axis passing through the first end 132 of crank 130. Crank 130 is engaged with a second gear 124, thereby rotating coaxially with the second gear 124 at the same rotational speed. The first end 132 of crank 130 is provided with a slot 136 into which a manipulating tool can be inserted to manually rotate crank 130, thereby controlling the movement of the handle 10 of circuit breaker 1. In other words, crank 130 can be electrically driven by motor 110 via transmission system 120, or manually driven via slot 136. The second end 134 of crank 130 is connected to connecting rod 140, thereby driving connecting rod 140 to move in a plane perpendicular to the second axis. In other words, the plane of motion of connecting rod 140 is parallel to the plane of rotation of crank 130 (e.g., as shown in the image). Figure 5 and Figure 6 (The horizontal plane shown). Preferably, the second gear 124 connected to the crank 130 can be an incomplete gear. In this way, when manual operation is performed, the second gear 124 connected to the crank 130 is disengaged from other gears upstream of the drive chain (e.g., the first gear 122), so that manual operation is not affected by the drive of the motor 110.

[0052] The connecting rod 140 has a rod-like shape and has a first end 142 and a second end 144 opposite to the first end 142. The first end 142 of the connecting rod 140 is connected to the second end 134 of the crank 130, thereby driving the connecting rod 140 by the crank 130. The transmission between the crank 130 and the connecting rod 140 is a crank-connecting rod transmission mode, in which the connecting rod 140 performs one cycle of reciprocating motion as the crank 130 rotates once around the second axis. The second end 144 of the connecting rod 140 is provided with a first through hole, thereby allowing the motion of the connecting rod 140 to continue to be transmitted downward. Preferably, the sidewall of the first through hole is formed of a friction-resistant material, thereby reducing wear of the drive member 150 in the first through hole.

[0053] The drive element 150 includes a first portion 152 and a second portion 154. The first portion 152 contacts and is driven by the connecting rod 140, and the second portion 154 contacts and drives the handle 10. The first portion 152 has a generally cylindrical shape and extends along a first direction through a first through-hole in the connecting rod 140. The connecting rod 140 only restricts the horizontal movement of the first portion 152 relative to the connecting rod 140, without restricting the vertical movement of the first portion 152 relative to the connecting rod 140. In other words, the first portion 152 can move up and down relative to the connecting rod 140 within the first through-hole. This constraint allows the connecting rod 140 to provide a horizontal driving force to the first portion 152. The second portion 154 also has a generally cylindrical shape and extends along a second direction. The second portion 154 is fixed to and perpendicular to the first portion 152. This invention reduces the cost associated with the slider (e.g., bearings, etc.) by providing the drive element 150 instead of the slider in the prior art, and saves the space occupied by the slider, which is beneficial for the miniaturization of the circuit breaker 1. Furthermore, because the drive unit 150 is fixedly connected to the handle 10, the risk of failure of the electric operating system 100 is reduced.

[0054] The handle 10 includes a driven portion 12, which is fixed to the main body of the handle 10. The driven portion 12 has a second through hole, through which a second portion 154 of the driving member 150 extends, allowing the driven portion 12 to rotate around the second portion 154 of the driving member 150. Thus, the second portion 154 of the driving member 150 can provide a radial thrust to the driven portion 12, thereby driving the handle 10 to rotate.

[0055] Preferably, the connecting rod 140 may have a main body 141 and an extension 143 protruding from a first end 142 of the main body 141 along a second direction. The extension 143 has a third through hole, and the second end 134 of the crank 130 has a protrusion 135 that inserts into the third through hole of the extension 143. By inserting the protrusion 135 of the crank 130 into the third through hole of the connecting rod 140, it is ensured that the connecting rod 140 will not tilt and deviate from the designed plane of motion.

[0056] The following is combined with Figures 2 to 4 The operation process of the electric operating system of the circuit breaker 1 according to an embodiment of the present invention is described in detail.

[0057] When circuit breaker 1 is in the open state (e.g.) Figure 2 When the crank 130 extends in the same direction as the connecting rod 140, and the connecting rod 140 is at its furthest point from the handle 10, the crank 130 extends counterclockwise to the intermediate position (as shown in the diagram). As the motor 10 operates, the handle 130 rotates counterclockwise to the intermediate position under the action of the motor 10. Figure 3As shown), the connecting rod 140 gradually moves to the right under the drive of the handle 130, thereby pushing the drive component 150 to move to the right, and in turn pushing the handle 10 to rotate clockwise. When the handle 130 rotates 180° from the initial position, the circuit breaker 1 switches to the closed state (as shown). Figure 4 As shown in the diagram, at this time, the extension direction of crank 130 is collinear with the extension direction of connecting rod 140, and connecting rod 140 is in the position closest to handle 10. The switching of the circuit breaker from the closed state to the open state is similar to the above description, and for the sake of brevity, it will not be described again in this article.

[0058] This document describes in detail several exemplary embodiments of the present invention with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various technical features and structures proposed in the present invention can be combined without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A circuit breaker, characterized in that, include: The handle is configured to rotate and move between a first position and a second position about a first axis to drive the moving contact to move between an open position and a closed position, thereby switching the circuit breaker between an open state and a closed state accordingly. Electric operating system, including: - Electric motor; - A crank, connected to the motor, the crank being configured to rotate about a second axis perpendicular to the first axis; - A connecting rod, the first end of which is connected to the crank, the connecting rod being configured to move in a plane perpendicular to the second axis under the drive of the crank, and the second end of the connecting rod having a first through hole; - A drive element, comprising a first portion and a second portion extending along a second direction and a first direction respectively, the first portion being fixed to the second portion, the first direction and the second direction being parallel to the first axis and the second axis respectively, the first portion being sleeved in the first through hole to be driven by the connecting rod, and the second portion being connected to the handle to drive the handle.

2. The circuit breaker according to claim 1, characterized in that, The first portion is configured to be movable relative to the link along the second direction.

3. The circuit breaker according to claim 2, characterized in that, The sidewall of the first through hole is formed of a friction-resistant material.

4. The circuit breaker according to claim 1, characterized in that, The handle includes a driven part, the driven part is provided with a second through hole, and the second part is sleeved in the second through hole so that the driving member drives the handle.

5. The circuit breaker according to claim 4, characterized in that, The driven part is capable of rotating and moving around the second part.

6. The circuit breaker according to claim 1, characterized in that, The second axis passes through the first end of the crank, and the second end of the crank, opposite to the first end, is connected to the connecting rod.

7. The circuit breaker according to claim 6, characterized in that, The connecting rod has a main body and an extension protruding from a first end of the main body along a second direction. The extension has a third through hole, and the second end of the crank has a protrusion that is inserted into the third through hole.

8. The circuit breaker according to claim 1, characterized in that, The electric operating system also includes a transmission assembly comprising a plurality of gears, the transmission assembly being configured to transmit power from the motor to the crank.

9. The circuit breaker according to claim 8, characterized in that, The crank has a slot extending along the second axis, and the electric operating system is configured to be manually operated via the slot.

10. The circuit breaker according to claim 9, characterized in that, The gear connected to the crank is an incomplete gear.

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