CN216435813U - Operating mechanism of circuit breaker - Google Patents

Abstract

An operating mechanism of a circuit breaker belongs to the technical field of low-voltage electrical appliances. Comprises a bracket, a jump buckle lever and a first locking piece; the support fix on the base of circuit breaker, jump and detain lever and first locking part all rotate the setting on the support, characteristics: the jump buckle lever comprises a pair of jump buckle lever side parts positioned at two sides, and each jump buckle lever side part is provided with a buckle end; a pair of buckle surfaces are arranged on two sides of the first locking piece; when the operating mechanism is in a re-buckling state, two snap fits are formed between the pair of buckle ends and the pair of buckle surfaces. The advantages are that: make the overlap joint cooperation between jump knot lever and the first locking part is more stable, has improved operating device's stability.

Description

Operating mechanism of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage electric appliances, and particularly relates to an operating mechanism of a circuit breaker.

Background

The closing and opening operation of the molded case circuit breaker can connect and disconnect the circuit, and the actuating element of the molded case circuit breaker is an operating mechanism. When the circuit abnormality is detected, the operating mechanism of the molded case circuit breaker is protected through tripping action. The three operations of closing, opening and tripping respectively correspond to three position states of the operating mechanism, namely closing state (ON), opening state (OFF) and tripping state (TRIP). In a tripping state, the closing operation can be performed only by performing a reset operation, also called a re-tripping operation, on the operating mechanism.

The reset operation (re-buckling operation) is executed, the handle of the molded case circuit breaker can be manually driven, and the circuit breaker can also be indirectly driven by an external electric operating mechanism. The jump buckle lever is driven by the lever which is integrally fixed with the handle through driving the handle, so that the jump buckle lever is overlapped with the mechanism locking piece again. During the reset operation, the driving handle is often required to be pressed into a breaking state (OFF position), so that the tripping lever is overlapped with the locking piece of the mechanism again. That is, the amount of over travel required to distinguish the handle from the OFF position is commonly referred to as the rebuttoning travel.

In an operating mechanism of an existing circuit breaker, a buckle end of a trip lever and a buckle surface of a first buckle piece form a buckle fit and are located on one side of the first buckle piece. This offset arrangement makes the buckle unstable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an operating mechanism of a circuit breaker, wherein a pair of buckle ends of a jump buckle lever and a pair of buckle surfaces of a first buckle piece form two buckle matches and are positioned at two sides of the first buckle piece, so that the lap fit between the jump buckle lever and the first buckle piece is more stable, and the stability of the operating mechanism is improved.

The task of the utility model is accomplished by the following steps that an operating mechanism of the circuit breaker comprises a bracket, a jump buckle lever and a first locking piece; the support is fixed on a base of the circuit breaker, the jump buckle lever and the first locking piece are rotatably arranged on the support, the jump buckle lever comprises a pair of jump buckle lever side parts positioned on two sides, and each jump buckle lever side part is provided with a buckle end; a pair of buckle surfaces are arranged on two sides of the first locking piece; when the operating mechanism is in a re-buckling state, two snap fits are formed between the pair of buckle ends and the pair of buckle surfaces.

In a specific embodiment of the utility model, the first locking member further comprises a pair of mating ends, and the pair of snap ends are in driving engagement with the pair of mating ends.

In another specific embodiment of the present invention, the operating mechanism further comprises a toggle linkage; elbow link mechanism include first connecting rod, second connecting rod and articulated shaft, the articulated shaft will the one end of first connecting rod and the one end of second connecting rod are articulated, the other end of first connecting rod is articulated with the main shaft of circuit breaker, the other end of second connecting rod supports and leans on jumping to detain the lever.

In another specific embodiment of the utility model, a jump buckle lever communication part is arranged between the pair of jump buckle lever side parts, and the jump buckle lever communication part connects the pair of jump buckle lever side parts into a whole; the hasp end is positioned on one side of the side part of the jump buckle lever close to the first hasp part.

In a further specific embodiment of the present invention, the bracket includes a bracket side portion, a bracket communicating portion is provided between the pair of bracket side portions, the bracket communicating portion connects the pair of bracket side portions integrally, and a first shaft is provided between the pair of bracket side portions, the first shaft being configured to limit the trip lever and to restrict the trip lever from swinging in one direction.

In another specific embodiment of the present invention, a second shaft is further disposed between a pair of the side portions of the bracket, a pair of jump buckle lever rotating holes is disposed on a pair of the side portions of the jump buckle lever, and the pair of jump buckle lever rotating holes is matched with the second shaft to complete the hinge joint between the jump buckle lever and the bracket.

In a further specific embodiment of the present invention, the operating mechanism further includes a second locking member rotatably disposed on the bracket, the first locking member includes a locking plate portion, and the locking plate portion is provided with a locking hole; the second lock catch piece is provided with lock catch side parts, and a snap hook is arranged on one lock catch side part; when the operating mechanism is in a tripping state, the snap hook is in snap fit with the snap hole.

In a more specific embodiment of the present invention, a third shaft and a fourth shaft are further provided between a pair of said bracket sides, said third shaft being used for the articulation of the second locking member, so that said second locking member is centered on said third shaft; the fourth shaft is used for the hinge joint of the first locking piece, so that the first locking piece uses the fourth shaft as a rotation center.

In yet another specific embodiment of the present invention, the first fastening member includes a locking plate portion, a pair of bent ear portions are disposed at two sides and a lower position of the locking plate portion, and the mating end is located on the bent ear portions.

In a still more specific embodiment of the present invention, the first fastening member includes a locking plate portion, notches are provided on both sides of the locking plate portion, and the fastening surface is located at an upper edge of the notch.

Due to the adoption of the structure, the utility model has the beneficial effects that: form two hasp cooperations between a pair of hasp end of jump buckle lever and a pair of hasp face of first latch member, and be located the both sides of first latch member, make the overlap joint cooperation between jump buckle lever and the first latch member is more stable, has improved operating device's stability.

Drawings

Figure 1 shows a partial schematic diagram of a circuit breaker according to the utility model.

Fig. 2 shows a schematic diagram of the mechanism of the circuit breaker of the present invention.

Fig. 3 shows a schematic view of a handle lever according to the present invention.

Fig. 4 shows a schematic view of a stent according to the present invention.

Fig. 5 shows a schematic view of the trip lever of the present invention.

Fig. 6 is a schematic view of the toggle linkage of the present invention.

Fig. 7 shows a schematic view of a first locking member of the present invention.

Fig. 8 shows a schematic view of a second catch member of the present invention.

Fig. 9 shows a schematic diagram of the circuit breaker in a tripped state in accordance with the present invention.

Fig. 10 is a schematic view showing a state in which the circuit breaker is in the process of the re-trip operation according to the present invention.

Fig. 11 is a schematic view showing another state of the circuit breaker during the re-trip operation according to the present invention.

Fig. 12 is a schematic diagram showing a state in which the circuit breaker is in a re-trip operation according to the present invention.

Fig. 13 is a schematic diagram showing the circuit breaker in the state of completion of the re-trip operation in the present invention.

In the figure: 1. the operating mechanism comprises an operating mechanism 11, a bracket 111, a bracket side part 112, a fixing part 113, a first shaft 114, a second shaft 115, a third shaft 116, a fourth shaft 117, an arc-shaped boss 117, a jump buckle lever 12, a jump buckle lever side part 121, a jump buckle lever rotating hole 122, a jump buckle lever rotating hole 123, an abutting round shaft 124, a jump buckle lever communicating part 125, a buckle end 13, an elbow link mechanism 131, a first connecting rod 1311, a main shaft hinge hole 132, a second connecting rod 1321, a connecting rod notch 133, a hinge shaft 14, a first locking piece 141, a locking plate part 142, a first locking piece rotating hole 143, a buckle surface 144, a buckle hole 145, a matching end 15, a second locking piece 151, a buckle side part 152, a second locking piece rotating hole 153, a buckle 154 and a buckle connecting part; 2. the handle comprises a handle, 21, a handle lever, 211, a handle lever side part, 212, an arc notch, 213, a spring hanging part, 214, a handle connecting part, 215, a pushing part and 22, a handle; 3. a main shaft; 4. a moving contact; 5. and (7) carrying out static contact.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be regarded as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the positions shown in the corresponding drawings, and thus, should not be construed as particularly limiting the technical solution provided by the present invention.

As shown in fig. 1, the circuit breaker includes an operating mechanism 1, a handle 2, a main shaft 3, and a contact system. The contact system comprises a movable contact 4 and a fixed contact 5. When the breaker is switched on and off, the handle 2 drives the operating mechanism 1 to act, the operating mechanism 1 drives the main shaft 3 to act after acting, and the main shaft 3 drives the moving contact 4 to realize contact or separation with the static contact 5, namely, the contact system acts.

The circuit breaker also includes a tripped state and a re-tripped state. The tripping state refers to a state that the circuit breaker is subjected to fault current and is automatically opened under the working condition. In the tripped state, in order to enable the circuit breaker to enter the reclosing state again, the handle 2 needs to be operated to enable the operating mechanism 1 to perform the reclosing operation, and then enter the reclosing state.

As shown in fig. 2, the operating mechanism 1 includes a bracket 11, a trip lever 12, an elbow link mechanism 13, a first locking member 14, and a second locking member 15. The bracket 11 is fixed on the base of the circuit breaker. The jump buckle lever 12 is rotatably arranged on the bracket 11 and is positioned inside the bracket 11. The elbow connecting rod mechanism 13 is a two-connecting rod structure, one end of the elbow connecting rod mechanism is hinged with the main shaft 3, and the other end of the elbow connecting rod mechanism abuts against the jump buckle lever 12. The first locking member 14 is rotatably disposed on the bracket 11, and the second locking member 15 is also rotatably disposed on the bracket 11.

The handle 2 comprises a handle lever 21 and a handle 22, and the handle lever 21 is fixedly connected with the handle 22. Namely, when the operator swings the handle 22, the handle lever 21 swings, i.e., the two swing synchronously.

The directions described below are all subject to the relevant figures.

Fig. 3 is a schematic view of the handle lever 21. The handle lever 21 is a metal member, and includes a pair of handle lever side portions 211, and the top portions of the pair of handle lever side portions 211 are connected through the top portions of the handle levers to form a "U" shape. A pushing part 215 is arranged on one side of the pair of handle lever side parts 211, and the pushing part 215 is used for pushing the jump buckle lever 12 to move. The top of the handle lever is provided with a spring hanging part 213, and the side part 211 of the handle lever is provided with a handle connecting part 214. The spring hanging part 213 is used for hanging one end of the spring, and the handle connecting part 214 is used for fixedly connecting the handle lever 21 and the handle 22. An arc-shaped notch 212 is also provided on a pair of said handle lever sides 211.

Fig. 4 is a schematic view of the bracket 11. The holder 11 includes holder side portions 111, and a holder communication portion is provided between the pair of holder side portions 111, and integrally connects the pair of holder side portions 111. The bracket side 111 is provided with two fixing parts 112, and each bracket side 111 is provided with two fixing parts 112, so that the bracket 11 is provided with four fixing parts 112, and screws penetrate through the fixing parts 112 to fix the bracket 11 to the base.

The bracket side 111 is also provided with an arc-shaped boss 117, the arc-shaped boss 117 is abutted and matched with the arc-shaped notch 212, and the arc-shaped boss 117 and the arc-shaped notch can slide relatively, so that a swinging fulcrum is provided for the handle lever 21.

A first shaft 113, a second shaft 114, a third shaft 115 and a fourth shaft 116 are further provided between a pair of the bracket sides 111. The first shaft 113 is used for limiting the jump buckle lever 12 and limiting the swing of the jump buckle lever 12 to one direction; the second shaft 114 is used for hinging the jump buckle lever 12, so that the jump buckle lever 12 takes the second shaft 114 as a rotation center; the third shaft 115 is used for the hinge joint of the second locking device 15, so that the second locking device 15 uses the third shaft 115 as the rotation center; the fourth shaft 116 is used for hinging the first locking member 14, so that the first locking member 14 uses the fourth shaft 116 as a rotation center.

Fig. 5 is a schematic view of the trip lever 12. The jump buckle lever 12 includes a jump buckle lever side portion 121, a jump buckle lever communication portion 124 is provided between the pair of jump buckle lever side portions 121, and the jump buckle lever communication portion 124 connects the pair of jump buckle lever side portions 121 integrally. A pair of jump buckle lever rotating holes 122 are formed in the pair of jump buckle lever side portions 121, and the pair of jump buckle lever rotating holes 122 are matched with the second shaft 114 to complete the hinge connection between the jump buckle lever 12 and the support 11. An abutting round shaft 123 is arranged on the inner side of the pair of jump buckle lever side parts 121, the abutting round shaft 123 is abutted and matched with one end of the elbow connecting rod mechanism 13, and the abutting round shaft 123 and one end of the elbow connecting rod mechanism 13 can slide to realize the swing of the elbow connecting rod mechanism 13 relative to the abutting round shaft 123.

The side 121 of the trip lever is further provided with a buckle end 125 at a side close to the first locking member 14, and the buckle end 125 is an extended boss structure. Specifically, the buckle end 125 is located on the side of the trip lever side 121 close to the first locking member 14. Each jump bar side 121 has a buckle end 125.

As shown in fig. 6, which is a schematic view of the elbow link mechanism 13, the elbow link mechanism 13 includes a first link 131, a second link 132 and a hinge shaft 133, the hinge shaft 133 hinges one end of the first link 131 and one end of the second link 132, and a spindle hinge hole 1311 is provided at the other end of the first link 131 for the hinge of the spindle 3; a connecting rod notch 1321 is arranged at the other end of the second connecting rod 132, the connecting rod notch 1321 is in abutting fit with the abutting circular shaft 123, and the two can slide, so that the second connecting rod 132 can swing relative to the abutting circular shaft 123.

A spring having one end hung on the hinge shaft 133 and the other end hung on the spring hanging part 213.

Fig. 7 shows the first fastening member 14, the first fastening member 14 includes a fastening plate portion 141, a pair of bending ear portions are disposed at two sides of the fastening plate portion 141 and below the fastening plate portion 141, a pair of first fastening member rotating holes 142 are disposed on the bending ear portions, and the pair of first fastening member rotating holes 142 are used for the fourth shaft 116 to pass through, so as to complete the hinge of the first fastening member 14 on the bracket 11, and a mating end 145 for driving and matching with the buckle end 125 is disposed on the bending ear portions.

And notches are provided at both sides of the locking plate portion 141, so that locking surfaces 143 are provided at both sides of the locking plate portion 141, a pair of the locking surfaces 143 are provided to be locked with the pair of locking ends 125, and the locking surfaces 143 are located at upper edges of the notches. This arrangement makes the snap-fit more stable than a snap-fit having only one snap face 143 and one snap end 125. Meanwhile, the two snap-fits are positioned on two sides, so that the structure is stable, and the parts cannot be laterally deviated.

More preferably, the pair of mating ends 145 are also located on the pair of bent ears, and correspondingly, the pair of buckle ends 125 are also located on the pair of bent ears, so that the driving fit of the two is more balanced and stable, and no biasing force is generated. And the mating end 145 is preferably configured such that, after the overlapping end 125 overlaps the overlapping surface 143, the mating end 145 will not substantially drive the first latching member 14 to rotate counterclockwise or drive rotation through a small angle, continuing to push the handle 2 in the refastening direction.

The locking plate portion 141 is provided with a locking hole 144, and preferably, the locking hole 144 is a square hole. The snap hole 144 is adapted to snap fit with the second latch member 15.

Fig. 8 is a schematic view of the second locking member 15, and the second locking member 15 is also a metal member. The second locking member 15 has a pair of locking side portions 151, and a second locking member rotating hole 152 is formed in the pair of locking side portions 151, and the second locking member rotating hole 152 is used for the third shaft 115 to pass through, so that the second locking member 15 is hinged to the bracket 11.

A latch coupling portion 154 is further disposed between the pair of latch side portions 151, the latch coupling portion 154 couples the pair of latch side portions 151 into a whole, and a snap hook 153 is disposed on one of the latch side portions 151, and the snap hook 153 is snap-fitted into the snap hole 144.

Fig. 9 and 10 are schematic views illustrating a process of the operation mechanism 1 performing the rebutting operation. Fig. 9 is a schematic diagram of a trip state, fig. 10, 11 and 12 are schematic diagrams of an intermediate state in a re-trip process, and fig. 13 is a schematic diagram of a re-trip state, where directions described below are based on the diagrams.

In the state of fig. 9, the operator operates the handle 2 to swing from the left side to the right side, the handle lever 21 also swings, the pressing portion 215 on the handle lever 21 drives the trip lever 12 to swing, and then the state of fig. 10 is entered, when the buckle end 125 of the trip lever 12 presses the mating end 145, the first buckle 14 rotates counterclockwise, after the state of fig. 11 and 12, the buckle 153 is disengaged from the buckle hole 144, and the disengaged buckle 153 swings clockwise due to the restoring force of the second buckle 15 itself. When the first locking member 14 swings counterclockwise to a proper position, the operator does not actuate the operating handle 2 any more, the operating mechanism 1 enters the state shown in fig. 13, the locking end 125 is locked on the locking surface 143, and the locking process is completed to enter the locking state.

Claims (10)

1. An operating mechanism of a circuit breaker comprises a bracket (11), a trip lever (12) and a first locking piece (14); support (11) fix on the base of circuit breaker, jump and detain lever (12) and first latch member (14) all rotate and set up on support (11), its characterized in that: the jump buckle lever (12) comprises a pair of jump buckle lever side parts (121) positioned at two sides, and each jump buckle lever side part (121) is provided with a buckle end (125); a pair of buckle surfaces (143) is arranged on two sides of the first buckle piece (14); when the operating mechanism is in a re-buckled state, two snap-fits are formed between the pair of buckle ends (125) and the pair of buckle surfaces (143).

2. The operating mechanism of a circuit breaker as claimed in claim 1 wherein said first latch member (14) further comprises a pair of mating ends (145), said pair of snap ends (125) being in driving engagement with said pair of mating ends (145).

3. An operating mechanism for a circuit breaker according to claim 1 wherein the operating mechanism further comprises a toggle linkage (13); elbow link mechanism (13) include first connecting rod (131), second connecting rod (132) and articulated shaft (133), articulated shaft (133) will the one end of first connecting rod (131) and the one end of second connecting rod (132) are articulated, the other end of first connecting rod (131) is articulated with main shaft (3) of circuit breaker, the other end of second connecting rod (132) supports and leans on jump buckle lever (12).

4. The operating mechanism of a circuit breaker according to claim 1 wherein a trip lever communication portion (124) is provided between a pair of said trip lever side portions (121), said trip lever communication portion (124) integrally connecting a pair of said trip lever side portions (121); the buckle end (125) is positioned on one side of the jump buckle lever side part (121) close to the first locking part (14).

5. The operating mechanism of a circuit breaker according to claim 1, wherein said bracket (11) includes a bracket side portion (111), a bracket communicating portion is provided between a pair of bracket side portions (111), said bracket communicating portion integrally connects a pair of said bracket side portions (111), a first shaft (113) is provided between a pair of said bracket side portions (111), said first shaft (113) is used for limiting said trip lever (12) and limiting the swing of said trip lever (12) in one direction.

6. The operating mechanism of a circuit breaker according to claim 5, wherein a second shaft (114) is further provided between a pair of said bracket sides (111), a pair of trip lever rotating holes (122) is provided on a pair of said trip lever sides (121), and a pair of said trip lever rotating holes (122) is engaged with said second shaft (114) to complete the hinge joint between said trip lever (12) and said bracket (11).

7. The operating mechanism of a circuit breaker according to claim 5, wherein the operating mechanism further comprises a second latch member (15), the second latch member (15) is rotatably disposed on the bracket (11), the first latch member (14) comprises a latch plate portion (141), and the latch plate portion (141) is provided with a latch hole (144); the second locking piece (15) is provided with locking side parts (151), and a snap hook (153) is arranged on one locking side part (151); when the operating mechanism is in a tripping state, the snap hook (153) is in snap fit with the snap hole (144).

8. The operating mechanism of a circuit breaker according to claim 7 wherein a third shaft (115) and a fourth shaft (116) are further provided between a pair of said cradle sides (111), said third shaft (115) being used for articulation of said second latch member (15) such that said second latch member (15) is centered on said third shaft (115); the fourth shaft (116) is used for hinging the first locking part (14), so that the first locking part (14) takes the fourth shaft (116) as a rotating center.

9. The operating mechanism of a circuit breaker as claimed in claim 2, wherein said first latch member (14) comprises a latch plate portion (141), a pair of bent ear portions are provided at lower positions on both sides of said latch plate portion (141), and said engaging end (145) is located on said bent ear portions.

10. The operating mechanism of a circuit breaker as claimed in claim 1, wherein said first latch member (14) comprises a latch plate portion (141), notches are provided at both sides of said latch plate portion (141), and said latch surface (143) is located at an upper edge of the notches.

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