CN114334562A - Circuit breaker operating mechanism - Google Patents

Abstract

The utility model provides an operating device of circuit breaker, operating device includes support, handle lever, first latch spare, jump and detains the lever, goes up connecting rod, lower connecting rod and pivot, it is articulated through upper and lower connecting rod articulated shaft to go up connecting rod and lower connecting rod, it connects to go up the connecting rod jump and detain the lever, the connecting rod is connected down the pivot, operating device passes through the support to be fixed on the circuit breaker base, the handle lever is erect on the support with rotating, first latch spare and jump and detain the lever and set up with rotating on the support, first latch spare and jump and detain lever hasp cooperation for pin or unblock jump and detain the lever, characteristics are: the operating mechanism is provided with a locking structure, and when the operating mechanism is in a brake-off state, the locking structure locks the first locking piece, so that when the operating mechanism is in the brake-off state, the first locking piece and the trip lever keep a hasp state, and the operating mechanism cannot be unlocked. The advantages are that: the complexity of the system is reduced and the action efficiency can be obviously improved.

Description

Circuit breaker operating mechanism

Technical Field

The invention belongs to the technical field of switching devices, and particularly relates to a circuit breaker operating mechanism.

Background

A typical example of the aforementioned circuit breaker is a molded case circuit breaker, but not limited to, which opens, closes and trips an electric line for the purpose of controlling and protecting the line. The aforementioned closing, opening and tripping are substantially realized by an operating mechanism of the circuit breaker, and specifically, the circuit breaker is tripped by unlocking the operating mechanism in a closing state to cut off the line, thereby achieving the purpose of protecting the line. As is known in the art, both overload and short-circuit releases and shunt and undervoltage releases unlock the operating mechanism by unlocking a latch of the operating mechanism, but in many cases, there is a requirement that the operating mechanism is not unlocked in the open state and under-voltage and power-off states of the circuit breaker. The reason for this can be verified by the following explanation: when the generator is powered off, namely the generator does not work, the electric operating mechanism sends a brake-separating instruction to enable a breaker to be subjected to brake separation (load disconnection), the generator stops, the undervoltage tripper loses power, and a traction rod of the operating mechanism is unlocked; the generator generates electricity, namely the generator works, the electric operating mechanism sends a closing instruction, two conditions exist under the state, firstly, the breaker is closed, the program is ended, secondly, the breaker is closed and fails, then, the breaker is in a tripping state, the opening button needs to be pressed firstly, the closing button is pressed after the opening, and the closing is realized, therefore, in order to improve the efficiency, the complexity of the system is reasonably reduced, and under the conditions of not few, a user requires to embody the condition that the operating mechanism is kept not to be unlocked under the opening state. The technical solutions described below have been created in this context.

Disclosure of Invention

The invention aims to provide a circuit breaker operating mechanism which can reliably ensure that a lock catch is unlocked in a switching-off state and an operating mechanism is continuously kept in a non-unlocking state, so that the complexity of a system is reduced and the action efficiency is improved.

The task of the invention is completed in this way, the operating mechanism of the circuit breaker comprises a bracket, a handle lever, a first buckle piece, a jump buckle lever, an upper connecting rod, a lower connecting rod and a rotating shaft, wherein the upper connecting rod and the lower connecting rod are hinged through an upper connecting rod hinged shaft and a lower connecting rod hinged shaft, the upper connecting rod is connected with the jump buckle lever, the lower connecting rod is connected with the rotating shaft, the operating mechanism is fixed on a circuit breaker base through the bracket, the handle lever is rotationally erected on the bracket, the first buckle piece and the jump buckle lever are rotationally arranged on the bracket, and the first buckle piece and the jump buckle lever are in hasp fit for locking or unlocking the jump buckle lever, and the operating mechanism is characterized in that: the operating mechanism is provided with a locking structure, and when the operating mechanism is in a brake-off state, the locking structure locks the first locking piece, so that when the operating mechanism is in the brake-off state, the first locking piece and the trip lever keep a hasp state, and the operating mechanism cannot be unlocked.

In a specific embodiment of the present invention, the locking structure includes a locking portion provided on the handle lever and a locking end provided on the first locking member, and the locking portion and the locking end contact each other to lock the first locking member when the operating mechanism is in the open state.

In another specific embodiment of the present invention, one side of the handle lever is formed with a first side arm of the handle lever, and the other side and at a position corresponding to the first side arm of the handle lever is formed with a second side arm of the handle lever, a first bending ear portion extends on the first side arm of the handle lever, and a second bending ear portion extends on the second side arm of the handle lever at a position corresponding to the first bending ear portion; the locking part is formed on the first bending lug part and/or the second bending lug part.

In a further specific embodiment of the present invention, a lock plate portion extends upward from the first lock member at a central position of an upper portion of the first lock member, a buckle hole for the trip lever to pass through is formed on the lock plate portion, and a buckle hole wall of the upper portion of the buckle hole is formed as a buckle surface of the trip lever; the locking device comprises a first locking piece, a support, a second locking piece, a support and a locking end, wherein locking piece arms extend from corresponding positions on two sides of the first locking piece respectively, locking piece arm grooves used for being matched with the support are formed in the locking piece arms, the locking piece arm grooves in the locking piece arms on one side of the first locking piece correspond to the locking piece arm grooves in the locking piece arms on the other side of the first locking piece, and the locking end is formed on one side, facing upwards, of the tail ends of the locking piece arm grooves.

In a further specific embodiment of the present invention, a trip lever buckle portion is formed at an end of the trip lever facing the first lock member and at a position corresponding to the buckle hole, and the trip lever buckle portion is inserted into the buckle hole to cooperate with the buckle surface to place the operating mechanism in a buckled state.

In a further specific embodiment of the present invention, the bracket includes a first bracket side plate and a second bracket side plate, the first bracket side plate and the second bracket side plate are disposed opposite to each other, and a trip lever limiting shaft for limiting the trip lever and preventing the trip lever from swinging in one direction is fixed between the first bracket side plate and the second bracket side plate.

In a more specific embodiment of the present invention, a jump buckle lever shaft is hinged on the bracket, a jump buckle lever fixing hole is formed on the jump buckle lever and at a position corresponding to the jump buckle lever shaft, the jump buckle lever fixing hole is fixedly sleeved on the jump buckle lever shaft, and both ends of the jump buckle lever shaft are sleeved on the inner side of the bracket, so that the jump buckle lever and the jump buckle lever shaft rotate on the bracket.

In a further specific embodiment of the present invention, a locking member engaging shaft is hinged between the facing sides of the first and second bracket side plates and at a position corresponding to the rear of the jump buckle lever limiting shaft, and the first locking member engages with the locking member engaging shaft to realize rotation between the first and second bracket side plates of the bracket.

In yet another specific embodiment of the present invention, the operating mechanism further includes a second locking member and a third locking member, the second locking member and the third locking member are respectively rotatably disposed on the bracket, a locking plate extends from the second locking member, the third locking member has a locking portion, and the locking plate and the locking portion are in abutting engagement when the operating mechanism is in a buckle state; the second locking fastener is also provided with a bearing, and when the operating mechanism is in a hasp state, the bearing and the upper back of the first locking fastener form a rolling pair.

In yet another specific embodiment of the present invention, a first pivot shaft of a latch member and a second pivot shaft of a latch member are hinged to the bracket, the second latch member is hinged to the first pivot shaft of the latch member to rotate the second latch member about the first pivot shaft of the latch member, and the third latch member is hinged to the second pivot shaft of the latch member to rotate the third latch member about the second pivot shaft of the latch member.

The technical scheme provided by the invention has the technical effects that: because the locking part is formed on the handle lever and the locking end is formed on the first locking piece, when the operating mechanism of the circuit breaker is in a brake-off state, the operating mechanism cannot be unlocked because the locking part and the locking end are contacted and locked, the complexity of the system is reduced, and the operating efficiency can be obviously improved.

Drawings

Fig. 1 is a schematic view of a locking portion of a handle lever and a locking end of a first locking member of an operating mechanism of the present invention in a state of being in contact with each other and locked.

Fig. 2 is a schematic view of the operating mechanism shown in fig. 1 with the locking portion of the handle lever and the locking end of the first locking member in a non-contact state.

Fig. 3 is a schematic view of the operating mechanism shown in fig. 1 performing a rebutting operation in a tripped state.

Fig. 4 is an assembled configuration view of the operating mechanism shown in fig. 1.

Fig. 5 is a detailed structural view of the handle lever shown in fig. 4.

Fig. 6 is a detailed structural view of the bracket shown in fig. 4.

Fig. 7 is a detailed structural view of the trip lever shown in fig. 4.

Fig. 8 is a detailed structural view of the first locking member shown in fig. 4.

Fig. 9 is a detailed structural view of the second locking member shown in fig. 4.

Fig. 10 is a detailed structural view of the third locking member shown in fig. 4.

Fig. 11 is a schematic view of the operating mechanism 1 in a closing state with the handle lever in a closing position.

Fig. 12 is a schematic view of the operating state of the handle lever when the operating mechanism 1 is operated to be released again.

Fig. 13 is a schematic view of the operating mechanism 1 in the brake-off state with the handle lever in the brake-off position.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the applicant below describes in detail by way of example, but the description of the example is not intended to limit the technical scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in material, should be considered as the technical 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 taken as examples according to the position state of the drawing being described, and thus, should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1 to 3, an operating mechanism 1, a base 5, a rotating shaft 2, a movable contact 3 and a fixed contact 4 of a contact system of a circuit breaker are shown. The operating mechanism 1 is installed in the base 5, a breaker handle (not shown in the figure) is installed on the operating mechanism 1, when the operating mechanism 1 is switched on and off, the breaker handle (not shown in the figure) drives the operating mechanism 1 to act, the operating mechanism 1 drives the rotating shaft 2 to act after acting, and the rotating shaft 2 drives the moving contact 3 to rotate to realize contact or separation with the static contact 4.

The operating mechanism 1 comprises an opening state, a closing state, a tripping state and a re-buckling state. The tripping state refers to that the operating mechanism 1 encounters fault current to cause long delay or instantaneous action of a release of the circuit breaker under the working condition, an actuating piece on the release drives the operating mechanism 1 to act, the first locking piece 13 unlocks the tripping lever 14, and the operating mechanism 1 is tripped.

Referring to fig. 4 in conjunction with fig. 1 to 3, the operating mechanism 1 includes a bracket 11, a handle lever 12, a first latch 13 as a metal member, and a trip lever 14, the operating mechanism 1 is fixed to the circuit breaker base through the bracket 11, the handle lever 12 is rotatably mounted on the bracket 11, and the first latch 13 and the trip lever 14 as a metal member are rotatably mounted on the bracket 11.

The technical key points of the technical scheme provided by the invention are as follows: the handle lever 12 is provided with a locking portion 123, the first locking member 13 is provided with a locking end 134, when the operating mechanism 1 is in the open state, the handle lever 12 is in the open position, the trip lever 14 is buckled with the first locking member 13, and the locking portion 123 and the locking end 134 are in contact with each other and locked, so that the operating mechanism 1 cannot be unlocked in the open state.

Referring to fig. 5, the handle lever 12 is a metal piece, and is preferably formed by stamping (by means of a die) using a stamping device, and a first side arm 121a of the handle lever is formed on one side of the handle lever 12, and a second side arm 121b of the handle lever is formed on the other side and at a position corresponding to the first side arm 121a of the handle lever, a first bending ear 122a extends on the first side arm 121a of the handle lever, and a second bending ear 122b corresponding to the first bending ear 122a extends on the second side arm 121b of the handle lever; the locking portion 123 is formed on the first bending ear portion 122a and/or the second bending ear portion 122 b. As described above, the locking portion 123 may be one, or may be a pair (i.e., two), and in the case of one, it may be formed on either one of the first bending lug part 122a and the second bending lug part 122b (in the present embodiment, it is formed on the first bending lug part 122a), and in the case of a pair, that is, two, it may be formed on one of the first bending lug part 122a and the second bending lug part 122b, and in the case of one pair, it is formed on each of the first bending lug part 122a and the second bending lug part 122b, and one locking portion 123 may be formed.

Further, as shown in fig. 5, a first side arm circular boss 124a is formed at the bottom of the first side arm 121a of the handle lever, and a second side arm circular boss 124b is formed at the bottom of the second side arm 121b of the handle lever. A receiving chamber 125 for receiving a spring shaft 1251 (shown in fig. 4) is further formed at the top of the handle lever 12.

Referring to fig. 6 to 10 in combination with fig. 11 to 13, as shown in fig. 8, a latch plate portion 131 extends upward from the first latch 13 and is located at a central position of an upper portion of the first latch 13, a rectangular latch hole 135 for passing the trip lever 14 is formed on the latch plate portion 131, and a latch hole wall of an upper portion of the latch hole 135 is formed as a latch surface 136 of the trip lever 14; a latch arm 132 extends from each of the two sides of the first latch 13, a latch arm recess 133 is formed in the latch arm 132 for engaging with the bracket 11, the latch arm recess 133 of the latch arm 132 on one side of the first latch 13 is located to correspond to the latch arm recess 133 of the latch arm 132 on the other side of the first latch 13, and the locking end 134 is formed on the side of the latch arm recess 133 facing upward.

A trip lever latch portion 141 (see fig. 4, 6 to 7) is formed at a position corresponding to the latch hole 135 at an end of the trip lever 14 facing the first latch 13, and the trip lever latch portion 141 is inserted into the latch hole 135 to engage with the latch surface 136, thereby bringing the operating mechanism 1 into a latched state.

As shown in fig. 4, the operating mechanism 1 further includes an upper link 17, a lower link 18 and a link hinge shaft 19, and one end of the upper link 17 and one end of the lower link 18 are hinged by the link hinge shaft 19, the other end of the upper link 17 is hinged to the trip lever 14 through an upper link shaft 171, and the other end of the lower link 18 is hinged to the rotating shaft 2 of the circuit breaker; the operating mechanism 1 further includes a second locking member 15 and a third locking member 16, the second locking member 15 and the third locking member 16 are respectively rotatably disposed on the bracket 11, a locking plate 151 extends from the second locking member 15, the third locking member 16 has a locking portion 162, and when the operating mechanism 1 is in a locking state, the locking plate 151 and the locking portion 162 are abutted and matched; the second locking member 15 is further provided with a bearing 152, and the bearing 152 forms a rolling pair with the upper back surface of the first locking member 13 when the operating mechanism 1 is in the locked state. That is, the bearing 152 is in rolling engagement with the rear side surface (taking the position state shown in fig. 8 as an example) of the locking plate portion 131 of the first locking member 13.

From the above description and in connection with fig. 4 it can be determined that: the operating mechanism 1 includes: the circuit breaker comprises a bracket 11, a handle lever 12, a first locking piece 13, a trip lever 14, a second locking piece 15, a third locking piece 16, an upper connecting rod 17, a lower connecting rod 18 and a connecting rod hinge shaft 19, wherein the bracket 11 is fixed on a base 5 of the circuit breaker; the trip lever 12 is rotatably disposed on the bracket 11 and located inside the bracket 11, the link hinge shaft 19 hinges one end of the upper link 17 and one end of the lower link 18, the other end of the upper link 17 is hinged to the trip lever 14, the other end of the lower link 18 is hinged to the rotating shaft 2 of the circuit breaker, the first locking member 13 is rotatably disposed on the bracket 11, and the second locking member 15 and the third locking member 16 are also rotatably disposed on the bracket 11.

Fig. 4 also shows a spring 126, one end of which spring 126 is braced against the aforementioned link joint 19 and the other end is braced against the aforementioned lever handle 12 via a spring shaft 1251.

Referring to fig. 4 and 6, the bracket 11 includes a first bracket side plate 111 and a second bracket side plate 112, the first bracket side plate 111 and the second bracket side plate 112 are disposed opposite to each other, and a trip lever limiting shaft 113 for limiting the trip lever 14 and preventing the trip lever 14 from swinging in one direction is fixed between the first bracket side plate 111 and the second bracket side plate 112.

As shown in fig. 4 and 6, a pair of first bracket side plate fixing portions 1111 is provided at a lower portion of the first bracket side plate 111, and a pair of second bracket side plate fixing portions 1121 is provided at a lower portion of the second bracket side plate 112, so that the first bracket side plate 111 and the second bracket side plate 112 pass through the pair of first bracket side plate fixing portions 1111 and the second bracket side plate fixing portions 1121, respectively, and are fixed to the base 5 by means of screws, thereby assuming the state shown in fig. 1 to 3.

As shown in fig. 6, each of the first bracket side plate 111 and the second bracket side plate 112 further has a circular notch 118, the circular notch 118 is abutted and matched with the first side arm circular boss 124a and the second side arm circular boss 124b, and the two can relatively slide (move) like a mortar head joint, so as to provide a pivot for the handle lever 12 to swing.

The first bracket side plate 111 and the second bracket side plate 112 each further have a [ shape ] boss 119, and the [ shape ] bosses 119 are symmetrically disposed and respectively cooperate with the handle lever first side arm 121a and the handle lever second side arm 121b of the handle lever 12 to limit the lateral movement of the handle lever 12.

A jump buckle lever shaft 114 is hinged on the bracket 11, i.e. between the first bracket side plate 111 and the second bracket side plate 112, a jump buckle lever fixing hole 142 is opened on the jump buckle lever 14 and at a position corresponding to the jump buckle lever shaft 114, the jump buckle lever fixing hole 142 is fixedly sleeved on the jump buckle lever shaft 114, and the jump buckle lever 14 and the jump buckle lever shaft 114 are rotatably arranged between the first bracket side plate 111 and the second bracket side plate 112 by sleeving two ends of the jump buckle lever shaft 114 on the inner side of the bracket 11, i.e. rotatably arranged on the bracket 11.

A latch fitting shaft 115 is hinged between the facing sides of the first and second bracket side plates 111 and 112 at a position corresponding to the rear of the trip lever stopper shaft 113, and the first latch 13 is rotated between the first and second bracket side plates 111 and 112 of the bracket 11 by the engagement of the latch arm groove 133 with the latch fitting shaft 115. From the foregoing description and with reference to the drawings in schematic form: the aforementioned locker arm recess 133 is used to be fitted with the locker-coupling shaft 115, thereby completing, i.e., accomplishing, the mounting of the first locker 13 on the bracket 11.

As shown in fig. 9 and 10, a first pivot shaft 116 of a latch member and a second pivot shaft 117 of a latch member are further hinged to the bracket 11, i.e., between the first bracket side plate 111 and the second bracket side plate 112, the second latch member 15 is hinged to the first pivot shaft 116 of the latch member to rotate the second latch member 15 about the first pivot shaft 116 of the latch member, and the third latch member 16 is hinged to the second pivot shaft 117 of the latch member to rotate the third latch member 16 about the second pivot shaft 117 of the latch member.

As shown in fig. 6 and 9, a torsion spring 1151 is fitted over the latch fitting shaft 115, and one leg of the torsion spring 1151 abuts on the first pivot shaft 116 of the latch and the other leg abuts on the first latch 13.

As shown in fig. 9, the second locking member 15 is provided with a rotation mounting hole 153, the second locking member 15 is hinged to the bracket 11 through the rotation mounting hole 153 by the first locking member pivot shaft 116, and the second locking member 15 rotates around the first locking member pivot shaft 116 as a rotation center. The second locking member 15 is provided with a locking plate 151, and the third locking member 16 is provided with a locking part 162, so that the locking plate 151 and the locking part 162 are abutted and matched when the operating mechanism 1 is in a locking state; the bearing 152 is hinged to the second locking member 15 through a bearing shaft 1521, and in a state that the operating mechanism 1 is buckled, the bearing 152 is abutted against and matched with the back of the first locking member 13, and the second locking member 15 is further provided with a spring abutting portion 154.

Fig. 9 shows a torsion spring 1161, the torsion spring 1161 being mounted on the catch member first pivot axle 116, a first torsion spring leg of the torsion spring 1161 abutting against the bracket 11 and a second torsion spring leg abutting against the spring abutment 154.

As shown in fig. 10, the third locking member 16 is provided with a hinge hole 161, and the third locking member 16 is hinged to the bracket 11 via the second pivot shaft 117 of the locking member, so that the third locking member 16 rotates around the second pivot shaft 117 of the locking member; since the third locking member 16 is provided with the locking portion 162, the locking portion 162 is in abutting engagement with the locking plate 151 in the locking state of the operating mechanism, and the second locking member 15 is locked; the third locking member 16 is also provided with a spring engaging hook 163.

Fig. 10 shows an acting spring 164, and one end of the acting spring 164 is hooked on the bracket 11, and the other end is hooked on the aforementioned spring hooking hook 163.

As shown in fig. 11 and fig. 2, the operating mechanism 1 is unlocked in a closed state, the lever 12 is in a closed position, the movable contact 3 is in contact with the stationary contact 4 by the main spring force, and the trip lever latch portion 141 of the trip lever 14 is in contact with the latch plate portion 131 of the first latch 13. Under the action of the main spring force, the trip lever 14 tends to rotate clockwise, and the trip lever 14 is balanced and stationary under the reaction force exerted by the first locking member 13. The bearing 152 of the second locking element 15 is abutted against the back of the locking plate portion 131 of the first locking element 13, the first locking element 13 tends to rotate counterclockwise under the action of the trip lever 14, the first locking element 13 is balanced and stationary under the counter-force applied by the second locking element 15, the locking portion 123 of the handle lever 12 is far away from the locking end 134 of the first locking element 13, the third locking element 16 is in a reset state, the second locking element 15 is abutted against the third locking element 16, and the second locking element 15 is balanced and stationary under the counter-force of the first locking element 13 and the third locking element 16.

The third locking piece 16 is triggered to unlock the operating mechanism, the third locking piece 16 rotates clockwise, the second locking piece 15 is separated from the third locking piece 16, the reaction force of the third locking piece 16 disappears, the balance between the second locking piece 15 and the first locking piece 13 is broken, the first locking piece 13 rotates counterclockwise, the locking part 123 of the handle lever 12 is far away from the locking end 134 of the first locking piece 13, the jump-catch lever locking part 141 on the jump-catch lever 14 is separated from the locking surface 136 of the first locking piece 13, the jump-catch lever 14 rotates clockwise, and the operating mechanism 1 is unlocked and tripped.

Referring to fig. 12 and fig. 3, when the operating mechanism 1 is in a trip state, the handle lever 12 is driven to rotate by rotating a breaker handle (not shown), the handle lever 12 drives the trip lever 14 to rotate counterclockwise, the trip lever latch portion 141 of the trip lever 14 moves downward to contact with the latch plate portion 131 of the first latch 13, and drives the first latch 13 to rotate counterclockwise, and the first latch 13 rotates clockwise under the action of the spring until the trip lever latch portion 141 of the trip lever 14 latches with the latch surface 136 of the first latch 13, the trip lever 14 makes the first latch 13 have a tendency to rotate counterclockwise under the action of the main spring force, the bearing 152 of the second latch 15 abuts against the back portion 131 of the first latch 13, and the first latch 13 is balanced and stationary under the reactive force exerted by the second latch 15, at this time, the locking portion 123 of the handle lever 12 contacts or blocks the locking end 134 of the first locking member 13 in the counterclockwise direction of the first locking member 13, and the operating mechanism 1 completes the re-locking operation.

As shown in fig. 13 in conjunction with fig. 1, the operating mechanism 1 performs an unlocking operation in the opening state, the lever 12 is in the opening position, under the action of the main spring force, the moving contact 3 and the static contact 4 are separated from contact and return to the opening state, the trip lever 14 is in the hasp state, the trip lever hasp part 141 is in lap joint with the hasp surface 136 of the first locking part 13, under the action of the main tension spring, the trip lever 14 tends to rotate clockwise, the trip lever 14 is balanced and stationary under the reaction force exerted by the first latch 13, the bearing 152 on the second latch 15 abuts against the back of the latch plate 131 of the first latch 13, the first latch 13 tends to rotate counterclockwise by the trip lever 14, and the first latch 13 is balanced and stationary by the reaction force applied from the second latch 15, and the locking portion 123 of the handle lever 12 contacts or blocks the locking end 134 of the first latch 13 in the counterclockwise direction of the first latch 13. The third locking element 16 is in a reset state, the second locking element 15 and the third locking element 16 are in abutting fit, and the second locking element 15 is balanced and stationary under the action force of the first locking element 13 and the counter-action force of the third locking element 16.

The third locking piece 16 is triggered to unlock the operating mechanism 1, the third locking piece 16 rotates clockwise, the second locking piece 15 is separated from the third locking piece 16, the reaction force of the third locking piece 16 disappears, the balance between the second locking piece 15 and the first locking piece 13 is broken, the first locking piece 13 rotates anticlockwise, the locking part 123 of the handle lever 12 is contacted with the locking end 134 of the first locking piece 13, the rotation of the first locking piece 13 is terminated, the second locking piece 15 returns to the balance state, the tripping lever buckling part 141 of the tripping lever 14 is not separated from the locking end 134 of the first locking piece 13, the operating mechanism 1 is still in a hasp state, and the third locking piece 16 is triggered under the opening state, but the operating mechanism is not unlocked.

In fact, the above-mentioned locking structure does not only include a form in which the locking portion 123 provided on the handle lever 12 and the corresponding locking end of the first locking member 13 are engaged; the locking structure may further include a locking portion (not shown) disposed on the upper link 17 and a corresponding locking end on the first locking member 13, and when the operating mechanism 1 is in the opening state, the locking portion (not shown) on the upper link 17 cooperates with the locking end on the first locking member 13 to lock the first locking member 13; the locking structure can be realized by matching a conversion part (not shown in the figure) arranged on the bracket 11 with a locking end on the first locking part 13, one end of the conversion part is rotatably arranged on the bracket 11, when the operating mechanism 1 is in an opening state, the handle lever 12 drives the other end of the conversion part (not shown in the figure) to rotate, when the operating mechanism 1 is in the opening state, the conversion part (not shown in the figure) is matched with the locking end on the first locking part 13 to lock the first locking part 13, when the operating mechanism 1 is in an closing state, the conversion part (not shown in the figure) automatically resets, and the operating mechanism 1 can be normally released. Likewise, said conversion element (not shown) can also be provided on the base 5, which performs exactly the same function as that provided on the support 11.

In conclusion, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the invention task and truly realizes the technical effects of the applicant in the technical effect column.

Claims (10)

1. An operating mechanism of a circuit breaker, the operating mechanism (1) comprises a support (11), a handle lever (12), a first locking piece (13), a jump buckle lever (14), an upper connecting rod (17), a lower connecting rod (18) and a rotating shaft (2), the upper connecting rod (17) and the lower connecting rod (18) are hinged through an upper connecting rod hinged shaft and a lower connecting rod hinged shaft (19), the upper connecting rod (17) is connected with the jump buckle lever (14), the lower connecting rod (18) is connected with the rotating shaft (2), the operating mechanism (1) is fixed on a circuit breaker base through the support (11), the handle lever (12) is rotatably erected on the support (11), the first locking piece (13) and the jump buckle lever (14) are rotatably arranged on the support (11), the first locking piece (13) is in snap-fit with the jump buckle lever (14) and used for locking or unlocking the jump buckle lever (14), the method is characterized in that: the operating mechanism (1) is provided with a locking structure, when the operating mechanism (1) is in a brake-off state, the locking structure locks the first locking piece (13), so that when the operating mechanism (1) is in the brake-off state, the first locking piece (13) and the trip lever (14) keep a hasp state, and the operating mechanism (1) cannot be unlocked.

2. The operating mechanism of the circuit breaker according to claim 1 wherein said locking structure comprises a locking portion (123) provided on the handle lever (12) and a locking end (134) provided on the first locking member (13), said locking portion (123) and locking end (134) contacting each other to lock the first locking member (13) when the operating mechanism (1) is in the opening state.

3. The operating mechanism of a circuit breaker according to claim 2, characterized in that the handle lever (12) is formed with a first handle lever side arm (121a) on one side and a second handle lever side arm (121b) on the other side and at a position corresponding to the first handle lever side arm (121a), a first bending ear (122a) extending on the first handle lever side arm (121a) and a second bending ear (122b) extending on the second handle lever side arm (121b) at a position corresponding to the first bending ear (122 a); the locking part (123) is formed on the first bending lug part (122a) and/or the second bending lug part (122 b).

4. The operating mechanism of circuit breaker according to claim 2, wherein a latch plate portion (131) extends upward from the first latch member (13) at a central position of an upper portion of the first latch member (13), a latch hole (135) for the trip lever (14) to pass through is formed in the latch plate portion (131), and a latch hole wall of an upper portion of the latch hole (135) is formed as a latch surface (136) of the trip lever (14); a locking piece arm (132) extends from the corresponding positions of the two sides of the first locking piece (13), a locking piece arm groove (133) used for being matched with the support (11) is formed in the locking piece arm (132), the position of the locking piece arm groove (133) on the locking piece arm (132) positioned on one side of the first locking piece (13) corresponds to the locking piece arm groove (133) on the locking piece arm (132) positioned on the other side of the first locking piece (13), and the locking end (134) is formed on one side, facing upwards, of the tail end of the locking piece arm groove (133).

5. The operating mechanism of circuit breaker according to claim 4, characterized in that a trip lever trip portion (141) is formed at an end of the trip lever (14) facing the first latch (13) and at a position corresponding to the trip hole (135), and the trip lever trip portion (141) is inserted into the trip hole (135) to cooperate with the trip surface (136) to place the operating mechanism (1) in a trip state.

6. The operating mechanism of circuit breaker according to claim 1 wherein said bracket (11) comprises a first bracket side plate (111) and a second bracket side plate (112), said first bracket side plate (111) and said second bracket side plate (112) are disposed facing each other and a trip lever limiting shaft (113) for limiting said trip lever (14) and preventing said trip lever (14) from swinging in one direction is fixed between said first bracket side plate (111) and said second bracket side plate (112).

7. The operating mechanism of circuit breaker as claimed in claim 1, wherein the bracket (11) is hinged with a trip lever shaft (114), a trip lever fixing hole (142) is formed on the trip lever (14) and at a position corresponding to the trip lever shaft (114), the trip lever fixing hole (142) is fixedly sleeved on the trip lever shaft (114), and two ends of the trip lever shaft (114) are sleeved on the inner side of the bracket (11) to enable the trip lever (14) and the trip lever shaft (114) to rotate on the bracket (11).

8. The operating mechanism of circuit breaker according to claim 6, wherein a latch fitting shaft (115) is hinged between the facing sides of the first and second rack side plates (111, 112) and at a position corresponding to the rear of the trip lever stopper shaft (113), and the first latch (13) is fitted with the latch fitting shaft (115) to rotate between the first and second rack side plates (111, 112) of the rack (11).

9. The operating mechanism of the circuit breaker according to claim 1, characterized in that the operating mechanism (1) further comprises a second latch member (15) and a third latch member (16), the second latch member (15) and the third latch member (16) are respectively rotatably disposed on the bracket (11), a latch plate (151) extends on the second latch member (15), a latch portion (162) is provided on the third latch member (16), and the latch plate (151) is in abutting fit with the latch portion (162) when the operating mechanism (1) is in a latched state; the second locking fastener (15) is also provided with a bearing (152), and when the operating mechanism (1) is in a hasp state, the bearing (152) and the upper back surface of the first locking fastener (13) form a rolling pair.

10. The operating mechanism of circuit breaker according to claim 9, wherein a latch member first pivot (116) and a latch member second pivot (117) are further hinged to the bracket (11), the second latch member (15) is hinged to the latch member first pivot (116) to rotate the second latch member (15) with the latch member first pivot (116) as a rotation center, and the third latch member (16) is hinged to the latch member second pivot (117) to rotate the third latch member (16) with the latch member second pivot (117) as a rotation center.

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