CN218351318U - Locking structure and circuit breaker of circuit breaker - Google Patents

Abstract

The utility model relates to a low-voltage apparatus field, concretely relates to locking structure of circuit breaker, it includes that the rocking arm rotates and sets up, push rod one end cooperates with driving piece, the other end is the push rod locking part, the driving piece includes the installation department that links to each other with the rocking arm is fixed and the drive division that links to each other with the installation department, the drive division includes linkage segment and drive section, linkage segment one end links to each other with the installation department, the other end extends to the direction of keeping away from the axis of rocking arm and links to each other with the drive section; when the rocker arm swings to a switching-on position, the driving piece drives the push rod to slide, so that the locking part of the push rod protrudes out of the shell, the elastic resetting piece stores energy, and an acting force for enabling the push rod to move towards the shell is applied to the push rod; the locking structure can effectively prevent the circuit breaker from being inserted into or pulled out of a circuit breaker mounting position in a closing state, and the reliability is high; the utility model discloses still relate to one kind and include locking structure's circuit breaker, it includes locking structure, its security is good.

Description

Locking structure and circuit breaker of circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, concretely relates to locking structure of circuit breaker and one kind include the circuit breaker of locking structure.

Background

As shown in fig. 1, in the prior art, in order to ensure the safety of the use of the plug-in circuit breaker and prevent the plug-in circuit breaker from being pulled out in a closing state, a locking structure is provided in the circuit breaker, which includes a push rod 3 and an elastic reset piece 4, and a driving rod 2a is provided on a rocker arm 1 of the circuit breaker; when the circuit breaker is switched on, the driving rod 2a pushes the push rod 3 to slide, so that the push rod inserting piece 3-2-1 at one end of the push rod 3 extends out of the outer side of the shell of the circuit breaker and is blocked with the shell structure of the circuit breaker mounting position to prevent the circuit breaker from being pulled out; because the circuit breaker with small rated current is small in size, the swing stroke of the rocker arm 1 is small, the sliding distance of the rocker arm 1 for driving the push rod 3 through the driving rod 2a is short, and the part of the push rod insert piece 3-2-1 protruding out of the shell 5 is short, the circuit breaker cannot be reliably locked by a locking structure, and the safety risk that the circuit breaker is pulled out in a closing state still exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a locking structure of a circuit breaker, which can effectively prevent the circuit breaker from being inserted into or pulled out of a circuit breaker mounting position under the switching-on state and has high reliability; also provided is a circuit breaker including the locking structure, which has good safety.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a locking structure of a circuit breaker comprises a shell of the circuit breaker and rocker arms respectively arranged in the shell, a driving piece fixedly arranged on the rocker arms, push rods arranged on the shell in a sliding mode and elastic reset pieces matched with the push rods, wherein the rocker arms are arranged in a rotating mode; when the rocker arm swings to the switching-on position, the driving piece drives the push rod to slide, the locking part of the push rod protrudes outside the shell, the elastic resetting piece stores energy, and acting force for enabling the push rod to move towards the inside of the shell is applied to the push rod.

Preferably, the driving section and the connecting section are connected in a bending mode and are parallel to the rotating axis of the rocker arm.

Preferably, the driving section is located outside the end of the rocker arm for operation, and the distance between the driving section and the rotation axis of the rocker arm is greater than the distance between the end of the rocker arm for operation and the rotation axis of the rocker arm.

Preferably, the installation department is equipped with the driving piece mounting hole, and the rocking arm is equipped with the rocking arm mounting hole, and the mounting passes the rocking arm mounting hole and with installation department and rocking arm fixed connection with the driving piece mounting hole.

Preferably, the driving part further comprises a driving part limiting structure, and the driving part limiting structure is matched with the rocker arm to prevent the driving part from rotating relative to the rocker arm; the driving part limiting structure is a limiting arm which is bent and connected with the mounting part, the rocker arm comprises a first limiting hole, and the limiting arm is inserted into the first limiting hole.

Preferably, the housing further comprises a housing guiding and limiting structure, and the housing guiding and limiting structure is in sliding limiting fit with the push rod, so that the push rod only has a degree of freedom of sliding in one direction relative to the housing.

Preferably, the shell guide limiting structure comprises a shell guide rail, and the shell guide rail comprises a shell guide groove arranged in the middle of the shell guide rail;

the locking structure further comprises a push rod sliding block fixedly connected with the push rod, the push rod sliding block comprises a sliding block arm, and the sliding block arm is arranged in the guide groove of the shell in a sliding mode.

Preferably, the shell guide limiting structure comprises an upper limiting structure and a lower limiting structure which are arranged at intervals relatively, and the push rod locking part is arranged between the upper limiting structure and the lower limiting structure in a sliding manner.

Preferably, the upper limiting structure is an upper limiting plate; the lower limiting structure comprises at least one pair of lower guide rail ribs which are arranged in parallel at intervals.

Preferably, the casing still includes casing slide rail structure, and casing slide rail structure includes the casing spout, and the push rod still includes the push rod sliding part that slides and set up in the casing spout and bend continuous with push rod locking part.

Preferably, the push rod further comprises a push rod limiting arm which is connected with the push rod locking part and is arranged side by side with the push rod sliding part at intervals; the shell further comprises a shell limiting table arranged between the push rod limiting arm and the push rod sliding part, and the push rod limiting arm is in limiting fit with the shell limiting table.

Preferably, the push rod comprises a push rod matching part, the push rod matching part and the push rod locking part are respectively connected with two ends of the push rod sliding part, and the push rod matching part is matched with the driving part; the shell further comprises a shell spring limiting plate connected with one end of the shell sliding rail structure, and the elastic reset piece is arranged between the shell spring limiting plate and the push rod matching portion.

The utility model discloses a locking structure of circuit breaker, its rocking arm swing makes the circuit breaker close a floodgate, drives the push rod to slide through the driving piece simultaneously, makes push rod locking part protrusion outside the casing; when the circuit breaker is installed at the circuit breaker installation position, the structure of the push rod locking part and the structure of the circuit breaker installation position are in limit fit, the circuit breaker is prevented from being pulled out of the circuit breaker installation position in a closing state, and the stability and the safety of power utilization are ensured; when the circuit breaker is in a closing state, the structure of the push rod locking part and the structure of the circuit breaker mounting position are in limit fit, and the circuit breaker can be prevented from being inserted into the circuit breaker mounting position; the linkage segment of drive division, one end links to each other with the installation department, and the other end extends and links to each other with the drive section to the axis direction of keeping away from the rocking arm, under the condition of the same angle of rocking arm swing, makes the drive section swing great distance to can drive the push rod and slide great distance, so that the part of push rod locking portion protrusion outside the casing is longer, make the cooperation of push rod locking portion and the structure of circuit breaker installation position more reliable.

In addition, the shell guiding and limiting structure is in sliding limiting fit with the push rod, the push rod only has the degree of freedom of sliding in one direction relative to the shell, so that the push rod is prevented from moving in the direction of inserting or pulling out the installation position of the circuit breaker, the circuit breaker can be effectively prevented from being inserted or pulled out of the installation position of the circuit breaker in a closing state, the push rod inserting piece is blocked by the shell of the installation position of the circuit breaker and deforms and/or shifts, the situation that other parts in the shell are damaged occurs, and the reliable and normal use of the locking structure is guaranteed.

The utility model discloses circuit breaker, it includes locking structure, its security is good.

Drawings

Fig. 1 is a structural schematic diagram of a locking structure of a prior art circuit breaker;

fig. 2 is a schematic perspective view of a locking structure of the circuit breaker in a closing state of the circuit breaker of the present invention;

fig. 3 is an enlarged schematic view of a portion a of fig. 2 according to the present invention;

fig. 4 is a schematic projection structure diagram of the locking structure of the circuit breaker in the tripping state of the circuit breaker of the present invention;

fig. 5 is a schematic diagram of a projection structure of a locking structure of the circuit breaker in a closing state of the circuit breaker of the present invention;

fig. 6 is a schematic structural diagram of the locking structure of the circuit breaker of the present invention, showing the sliding distance of the push rod when the circuit breaker is switched between the closing state and the tripping state;

fig. 7 is a schematic structural view of the locking structure of the circuit breaker of the present invention, which shows a first embodiment in which the housing guiding and limiting structure cooperates with the push rod;

figure 8 is an exploded schematic view of the locking structure of the circuit breaker of figure 7 of the present invention;

fig. 9 is a schematic structural view of a locking structure of the circuit breaker of the present invention, which shows a second embodiment in which the housing guide limiting structure is engaged with the push rod;

fig. 10 is an exploded view of the locking structure of the circuit breaker of fig. 9 according to the present invention.

Detailed Description

The following description will further describe a specific embodiment of the locking structure of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 10. The locking structure of the circuit breaker of the present invention is not limited to the description of the following embodiments.

The utility model discloses locking structure of circuit breaker, it includes the casing 5 of circuit breaker and sets up rocking arm 1 of circuit breaker in casing 5 respectively, driving piece 2 fixed setting on rocking arm 1, push rod 3 sliding setting on casing 5 and with push rod 3 complex elasticity reset piece 4, rocking arm 1 is used for driving circuit breaker divide-shut brake, rocking arm 1 rotates the setting, push rod 3 one end cooperates with driving piece 2, the other end is push rod locking part 3-2, driving piece 2 includes installation department 2-0 fixedly connected with rocking arm 1 and drive division 2-1 connected with installation department 2-0, drive division 2-1 includes linkage segment and drive section 2-1-0, linkage segment one end and installation department 2-0, the other end extends and links to each other with drive section 2-1-0 to the direction of keeping away from the axis of rocking arm 1; when the swing 1 swings to a switching-on position, the driving piece 2 drives the push rod 3 to slide, so that the push rod locking part 3-2 protrudes out of the shell 5, the elastic resetting piece 4 stores energy, and an acting force for enabling the push rod 3 to move towards the shell 5 is applied to the push rod. Furthermore, the circuit breaker is opened or tripped, and when the swing 1 swings to the opening position or the tripping position, the elastic resetting piece 4 releases energy to drive the push rod 3 to move towards the shell 5.

The utility model discloses a locking structure of circuit breaker, its rocking arm 1 swings and makes the circuit breaker close a floodgate, drives the push rod 3 to slide through the driving piece 2 at the same time, makes the push rod locking part 3-2 protrude outside the shell 5; when the circuit breaker is installed at the circuit breaker installation position, the push rod locking part 3-2 is in limit fit with the structure of the circuit breaker installation position, so that the circuit breaker is prevented from being pulled out of the circuit breaker installation position in a closing state, and the stability and safety of power utilization are ensured; when the circuit breaker is in a closing state, the push rod locking part 3-2 is in limit fit with the structure of the circuit breaker mounting position, and the circuit breaker can be prevented from being inserted into the circuit breaker mounting position; one end of the connecting section of the driving part 2-1 is connected with the mounting part 2-0, the other end of the connecting section extends towards the axis direction far away from the rocker arm 1 and is connected with the driving section 2-1-0, and under the condition that the rocker arm 1 swings at the same angle, the driving section 2-1-0 swings for a larger distance, so that the push rod 3 can be driven to slide for a larger distance, the part of the push rod locking part 3-2 protruding out of the shell 5 is longer, and the matching of the push rod locking part 3-2 and the structure of the circuit breaker mounting position is more reliable.

The 'circuit breaker installation position' refers to a cabinet, a power distribution box and the like for installing and containing a circuit breaker, and comprises an installation position shell, wherein the installation position shell is provided with an avoidance groove or a hole which is matched with the push rod inserting piece 3-2-1 for the insertion of the push rod inserting piece.

As shown in fig. 2-10, it is an embodiment of the locking structure of the circuit breaker of the present invention.

As shown in fig. 2 and 7-10, the locking structure of this embodiment includes a housing 5 of the circuit breaker, and a rocker arm 1 of the circuit breaker, a driving member 2 fixedly disposed on the rocker arm 1, a push rod 3 slidably disposed on the housing 5, and an elastic reset member 4 engaged with the push rod 3, where one end of the rocker arm 1 (preferably, a lower end of the rocker arm 1) is rotatably disposed on a mechanism bracket of the operating mechanism, one end of the push rod 3 is engaged with the driving member 2, and the other end is a push rod locking portion 3-2, the push rod locking portion 3-2 includes a push rod insert 3-2-1, the driving member 2 includes an installation portion 2-0 fixedly connected to the rocker arm 1 and a driving portion 2-1 connected to the installation portion 2-0, the driving portion 2-1 includes a connection section and a driving section 2-1-0, one end of the connection section is connected to the installation portion 2-0, and the other end extends in a direction away from an axis of the rocker arm 1 and is connected to the driving section 2-1-0; the rocker arm 1 swings to switch on the circuit breaker (preferably, the rocker arm 1 swings clockwise to switch on the circuit breaker, and the rocker arm 1 swings anticlockwise to switch off the circuit breaker), the driving piece 2 drives the push rod 3 to slide, so that the push rod inserting piece 3-2-1 penetrates through the shell opening 5-0 on the shell 5 and protrudes out of the shell 5, the elastic resetting piece 4 stores energy, and an acting force which enables the push rod 3 to move towards the shell 5 is applied to the push rod 3; when the circuit breaker is in a tripping, re-buckling or opening state, the rocker arm 1 drives the driving part 2 to avoid the push rod 3, and the elastic resetting part 4 releases energy to drive the push rod 3 to slide to an initial position, so that the push rod inserting piece 3-2-1 moves into the shell 5.

Referring to fig. 1 and 6, when the circuit breaker of the prior art and the circuit breaker of this embodiment are switched from a closing state to a tripping state (in fig. 1 and 6, a locking structure of the circuit breaker in the closing state is located above, and a locking structure of the circuit breaker in the tripping state is located below), the swing angles of the rocker arms 1 are the same; however, in the circuit breaker of the prior art and the circuit breaker of this embodiment, when the rocker arm 1 swings at the same angle, the swing distance of the driving section 2-1-0 is greater than the swing distance of the driving rod 2a, so that the sliding distance d2 of the push rod 3 of this embodiment is greater than the sliding distance d1 of the push rod 3 of the prior art.

As shown in fig. 2, 4-5, 7 and 9, the driving section 2-1-0 is connected with the connecting section in a bending way and is parallel to the rotation axis of the rocker arm 1. Further, the extension direction of the driving section 2-1-0 is perpendicular to the sliding direction of the push rod 3.

Preferably, as shown in fig. 3, the connection section includes a connection section first plate 2-1-1 and a connection section second plate 2-1-2, the mounting plate 2-0, the connection section second plate 2-1-2, the connection section first plate 2-1-1 and the driving section 2-1-0 are sequentially connected, the connection section second plate 2-1-2, the connection section first plate 2-1-1 and the driving section 2-1-0 are integrally in a zigzag structure, and the connection section second plate 2-1-2 and the driving section 2-1-0 are arranged in parallel.

As shown in fig. 2, 4-5, 7 and 9, the driving section 2-1-0 is located outside the end of the rocker arm 1 for operation, and the distance between the driving section 2-1-0 and the rotation axis of the rocker arm 1 is greater than the distance between the end of the rocker arm 1 for operation and the rotation axis of the rocker arm 1. Specifically, as shown in fig. 2, 4-5, 7 and 9, the driving section 2-1-0 is located above the upper end of the rocker arm 1 (i.e. the end of the rocker arm 1 for operation), and protrudes from the upper end of the rocker arm 1.

As shown in fig. 2-10, the mounting portion 2-0 is provided with a driving member mounting hole 2-0-0, the rocker arm 1 is provided with a rocker arm mounting hole, and the fixing member 12 passes through the rocker arm mounting hole and the driving member mounting hole 2-0-0 to fixedly connect the mounting portion 2-0 with the rocker arm 1; the driving part 2 further comprises a driving part limiting structure, and the driving part limiting structure is matched with the rocker arm 1 to prevent the driving part 2 from rotating relative to the rocker arm 1.

Preferably, as shown in fig. 7-10, the fasteners 12 are rivets or screws.

As shown in fig. 2 to 6, for one implementation of the driving member limiting structure: the limiting structure of the driving part is a limiting arm 2-2 connected with the mounting part 2-0 in a bending mode, the rocker arm 1 comprises a first limiting hole, and the limiting part 2-2 is inserted into the first limiting hole. Furthermore, the limiting arm 2-2 is bent towards the side where the rocker arm 1 is located, and the limiting arm 2-2 is located on one side of the driving piece mounting hole 2-0-0.

As shown in fig. 7-10, another implementation of the driving member limiting structure is as follows: the driving piece limiting structure is a driving piece limiting hole 2-0-1 arranged on the mounting part 2-0, and the driving piece limiting hole 2-0-1 and the driving piece mounting hole 2-0-0 are arranged side by side; the rocker arm 1 further comprises a second limiting hole, and the limiting piece is inserted into the driving piece limiting hole 2-0-1 and the second limiting hole.

Preferably, the retaining member is preferably a rivet or a screw.

As shown in fig. 2-10, the mounting portion 2-0 and the driving portion 2-1 are located on the same side of the mounting portion 2-0.

As shown in fig. 7-10, the rocker arm 1 is a U-shaped structure, and includes a rocker arm main plate 1-0 and two rocker arm support plates 1-1, wherein the two rocker arm support plates 1-1 are connected with two ends of the rocker arm main plate 1-0 in a bending manner; the installation part 2-0 of the driving part 2 is fixedly arranged on a rocker arm supporting plate 1-1, and the end part of the rocker arm supporting plate 1-1 far away from the rocker arm main plate 1-0 is rotatably arranged on a mechanism bracket of the operating mechanism.

As shown in fig. 7-10, the housing 5 further includes a housing guide and limit structure 5-1, and the housing guide and limit structure 5-1 is slidably engaged with the push rod 3 to limit the degree of freedom of the push rod 3 to slide in one direction relative to the housing 5, i.e., only allow the push rod 3 to slide relative to the housing 5, so that the push rod insert 3-2-1 protrudes or moves into the housing 5. Further, the sliding direction of the push rod 3 is perpendicular to the direction of inserting or pulling the circuit breaker into or out of the circuit breaker mounting position.

The shell guiding and limiting structure 5-1 is in sliding limiting fit with the push rod 3, the push rod 3 only has the degree of freedom of sliding in one direction relative to the shell 5, so that the push rod 3 is prevented from moving along the direction that the circuit breaker is inserted into or pulled out of the circuit breaker mounting position, the circuit breaker can be effectively prevented from being inserted into or pulled out of the circuit breaker mounting position in a closing state, the push rod inserting piece 3-2-1 is blocked by the shell of the circuit breaker mounting position to deform and/or shift, other parts in the shell 5 are damaged, and the reliable and normal use of the locking structure is ensured.

As shown in fig. 7-8, a first embodiment of the sliding limit fit of the housing guide limit structure 5-1 and the push rod 3 is provided.

The shell guide limiting structure 5-1 comprises a shell guide rail 5-1-0, and the shell guide rail 5-1-0 comprises a shell guide groove arranged in the middle of the shell guide rail; the locking structure further comprises a push rod sliding block 6 fixedly connected with the push rod 4, the push rod sliding block 6 comprises a sliding block arm 6-1, and the sliding block arm 6-1 is arranged in the guide groove of the shell in a sliding mode.

As shown in fig. 7-8, for one implementation manner of the cooperation of the housing guiding and limiting structure 5-1 and the push rod slider 6: the shell guide limiting structure 5-1 comprises two shell guide rails 5-1-0 arranged side by side at intervals, each shell guide rail 5-1-0 comprises a shell guide groove arranged in the middle of the shell guide rail, and the extension directions of the shell guide grooves and the shell guide rails 5-1-0 are the same; the push rod sliding block 6 further comprises a sliding block connecting plate 6-0 fixedly connected with the push rod 3, the number of the sliding block arms 6-1 is two, the two sliding block arms 6-1 are symmetrically arranged on two sides of the sliding block connecting plate 6-0 and are respectively connected with the sliding block connecting plate, and the two sliding block arms 6-1 are respectively arranged in the shell guide grooves of the two shell guide rails 5-1-0.

Specifically, as shown in the direction of fig. 7, the slider arm 6-1 is engaged with the housing guide groove to prevent the push rod locking portion 3-2 from moving up and down, and the push rod locking portion 3-2 can only move inward and outward relative to the housing 5, that is, slide outward of the housing 5 and slide inward of the housing 5; when the breaker is inserted into or pulled out of the breaker mounting position in a closing state, the push rod inserting piece 3-2-1 protrudes out of the shell 5, the push rod inserting piece 3-2-1 is blocked by the shell of the breaker mounting position, the push rod locking portion 3-2 can be overturned, deformed and/or displaced, and the slider arm 6-1 is matched with the shell guide groove, so that the problems can be avoided.

As shown in fig. 8, for one implementation of the push rod slider 6: the push rod sliding block 6 comprises a sliding block connecting plate 6-0 and sliding block arms 6-1 which are fixedly connected with the push rod locking part 3-2, the sliding block connecting plate 6-0 is connected with the two sliding block arms 6-1 in a parallel and staggered mode, and the two sliding block arms 6-1 are positioned on the same side of the sliding block connecting plate 6-0. Further, the push rod sliding block 6 is formed by cutting and bending a metal plate, or the push rod sliding block 6 is of an integrated injection molding structure.

Preferably, as shown in fig. 7-8, the slider connecting plate 6-0 is fixedly connected to the push rod locking portion 3-2 by a first rivet 36, the slider connecting plate 6-0 is provided with a slider through hole 6-0-0 for the first rivet 36 to pass through, and the push rod locking portion 3-2 is provided with a push rod through hole 3-2-00 for the first rivet 3 to pass through.

As shown in fig. 7-8, the housing 5 further includes a housing platform 5-5, the housing guiding and limiting structure 5-1 is disposed on the housing platform 5-5, and the housing platform 5-5 is connected to the sidewall of the housing 5 having the housing opening 5-0. Further, the housing guide 5-1-0 is also connected to a side wall of the housing 5 provided with the housing opening 5-0.

As shown in fig. 9-10, a second embodiment of the sliding limit fit of the housing guide limit structure 5-1 and the push rod 3 is provided.

The shell guiding and limiting structure 5-1 comprises an upper limiting structure 5-1-1 and a lower limiting structure which are arranged at intervals relatively, and the push rod locking part 3-2 is arranged between the upper limiting structure 5-1-1 and the lower limiting structure in a sliding mode.

Preferably, as shown in fig. 8-10, the upper limit structure 5-1-1 is an upper limit plate, and the upper limit plate is arranged in parallel with the push rod locking part 3-2.

Preferably, as shown in fig. 8-10, the lower limiting structure includes at least one pair of lower guide rail ribs 5-1-2 arranged in parallel at intervals, and the push rod locking portion 3-2 is slidably disposed on each lower guide rail rib 5-1-2 to reduce the friction between the push rod locking portion 3-2 and the lower limiting structure.

As shown in fig. 8-9, the lower guide rail rib 5-1-2 of the lower limiting structure is arranged on the shell platform 5-5, and the shell platform 5-5 and the upper limiting structure 5-1-1 are connected with the side wall of the shell 5 provided with the shell opening 5-0. Furthermore, one end of the lower guide rail rib 5-1-2 of the lower limiting structure is also connected with the side wall of the shell 5 provided with the shell opening 5-0.

As shown in fig. 7-10, the housing 5 further includes a housing slide rail structure, the housing slide rail structure includes a housing sliding groove 5-3, and the push rod 3 further includes a push rod sliding portion 3-1 slidably disposed in the housing sliding groove 5-3 and connected to the push rod locking portion 3-2 in a bent manner. Furthermore, the push rod sliding part 3-1 is a push rod sliding plate, and the plane of the push rod sliding plate is perpendicular to the plane of the push rod locking part 3-2.

As shown in fig. 7-10, the push rod 3 further comprises a push rod limiting arm 3-3 connected with the push rod locking part 3-2 and arranged side by side with the push rod sliding part 3-1 at an interval; the shell 5 further comprises a shell limiting table 5-2 arranged between the push rod limiting arm 3-3 and the push rod sliding part 3-1, and the push rod limiting arm 3-3 is in limiting fit with the shell limiting table 5-2; when the circuit breaker is installed to a circuit breaker installation position and is not installed in place, if an operator performs switching-on operation, the rocker arm 1 drives the push rod 3 to slide through the driving piece 2 so that the push rod inserting piece 3-2-1 moves towards the outside of the shell 5, and the push rod inserting piece 3-2-1 abuts against the shell of the circuit breaker installation position and cannot extend out of the outside of the shell 5 because the circuit breaker is not installed in place, so that the push rod inserting piece 3-2-1 is easy to deform (for example, the push rod locking portion 3-2 bends and/or shifts towards the side where the push rod sliding portion 3-1 is located), and the push rod limiting arm 3-3 is matched with the shell limiting table 5-2, so that the situation can be effectively avoided.

As shown in fig. 7-10, the housing slide rail structure and the housing stop 5-2 are both disposed on the housing platform 5-5.

As shown in fig. 2-10, the push rod 3 includes a push rod matching portion 3-0, the push rod matching portion 3-0 and the push rod locking portion 3-2 are respectively connected to two ends of the push rod sliding portion 3-1, and the push rod matching portion 3-0 is matched with the driving member 2. Further, the middle part of the push rod matching part 3-0 is connected with the push rod sliding part 3-1, the push rod matching part 3-0 and the push rod sliding part 3-1 are integrally in a T-shaped structure, one end of the push rod matching part 3-0-0 is a matching part driven end 3-0, the other end of the push rod matching part 3-1 is a matching part matching end 3-0-1, the side surface, facing the driving piece 2, of the matching part driven end 3-0-0 is a matching part driven surface 3-0-3, and a matching part protrusion 3-0-2 is arranged at the matching part matching end 3-0-1.

Preferably, as shown in fig. 7-10, the push rod matching part 3-0 and the push rod sliding part 3-1 are coplanar and located in the same plane, and the plane of the push rod locking part 3-2 is perpendicular to the plane of the push rod sliding part 3-1.

As shown in fig. 2 to 10, the elastic restoring member 4 is a restoring spring, and the restoring spring is a compression spring and is disposed between the push rod 3 and the housing 5. Further, as shown in fig. 2-5 and 7-10, the housing 5 further includes a housing spring limiting plate 5-4 connected to one end of the housing slide rail structure, a pressure spring is disposed between the housing spring limiting plate 5-4 and the push rod fitting portion 3-0, one end of the pressure spring is sleeved on the fitting portion protrusion 3-0-2, and the other end of the pressure spring abuts against the housing spring limiting plate 5-4.

As other embodiments, the elastic restoring member 4 may also be a tension spring, a spring plate, or the like.

The utility model discloses still disclose a circuit breaker, it includes locking structure, its security is good.

The utility model discloses the circuit breaker still includes operating device, and operating device includes the mechanism support, jumps to detain, hasp, crank, connecting rod and detains again, jumps to detain, hasp, rocking arm 1 and detains again and rotate the setting respectively on the mechanism support, jumps to detain and hasp cooperation, the hasp with detain spacing cooperation again, the crank links to each other with jumping the knot dwang, connecting rod one end links to each other with the crank rotation, the other end links to each other with the moving contact rotation of circuit breaker. Further, the utility model discloses the circuit breaker still includes trip bar, short-circuit protection mechanism and overload protection mechanism respectively with trip bar drive cooperation, the trip bar with detain the drive cooperation again, when taking place overload or short-circuit fault, short-circuit protection mechanism or overload protection mechanism drive trip bar rotate, the trip bar drive is detained again and is relieved spacing cooperation with the hasp, make the hasp and jump and detain and relieve the hasp cooperation, the circuit breaker is threaded off.

The utility model discloses the circuit breaker still includes binding post, and binding post includes inlet wire binding post and the binding post of being qualified for the next round of competitions, and inlet wire binding post all is located same one end of casing H with the binding post of being qualified for the next round of competitions, and binding post and operating device set up respectively at the relative both ends of casing H.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (12)

1. A locking structure of a circuit breaker is characterized by comprising a shell (5) of the circuit breaker, rocker arms (1) which are respectively arranged in the shell (5), a driving part (2) which is fixedly arranged on the rocker arms (1), push rods (3) which are slidably arranged on the shell (5) and elastic reset parts (4) which are matched with the push rods (3), wherein the rocker arms (1) are rotatably arranged, one ends of the push rods (3) are matched with the driving part (2), the other ends of the push rods are push rod locking parts (3-2), the driving part (2) comprises mounting parts (2-0) which are fixedly connected with the rocker arms (1) and driving parts (2-1) which are connected with the mounting parts (2-0), the driving parts (2-1) comprise connecting sections and driving sections (2-1-0), one ends of the connecting sections are connected with the mounting parts (2-0), and the other ends of the connecting sections extend towards the direction far away from the axes of the rocker arms (1) and are connected with the driving sections (2-1-0); when rocking arm (1) swung to the switching-on position, slided through driving piece (2) drive push rod (3), made push rod locking part (3-2) protrusion outside casing (5), elasticity resets piece (4) energy storage, applys the effort that makes it remove in casing (5) to push rod (3).

2. The locking structure of a circuit breaker according to claim 1, wherein: the driving section (2-1-0) is connected with the connecting section in a bending mode and is parallel to the rotating axis of the rocker arm (1).

3. The locking structure of a circuit breaker according to claim 1, wherein: the driving section (2-1-0) is positioned on the outer side of one end, used for operation, of the rocker arm (1), and the distance between the driving section (2-1-0) and the rotating axis of the rocker arm (1) is larger than the distance between one end, used for operation, of the rocker arm (1) and the rotating axis of the rocker arm (1).

4. The locking structure of a circuit breaker according to claim 1, wherein: the installation part (2-0) is provided with a driving part installation hole (2-0-0), the rocker arm (1) is provided with a rocker arm installation hole, and the fixing part (12) penetrates through the rocker arm installation hole and the driving part installation hole (2-0-0) to fixedly connect the installation part (2-0) with the rocker arm (1).

5. The locking structure of a circuit breaker according to claim 4, wherein: the driving part (2) further comprises a driving part limiting structure, and the driving part limiting structure is matched with the rocker arm (1) to prevent the driving part (2) from rotating relative to the rocker arm (1); the limiting structure of the driving part is a limiting arm (2-2) connected with the mounting part (2-0) in a bending mode, the rocker arm (1) comprises a first limiting hole, and the limiting arm (2-2) is inserted into the first limiting hole.

6. The locking structure of a circuit breaker according to claim 1, wherein: the shell (5) further comprises a shell guiding and limiting structure (5-1), and the shell guiding and limiting structure (5-1) is in sliding limiting fit with the push rod (3), so that the push rod (3) only has the freedom degree of sliding in one direction relative to the shell (5).

7. The locking structure of a circuit breaker according to claim 6, wherein: the shell guiding and limiting structure (5-1) comprises a shell guide rail (5-1-0), and the shell guide rail (5-1-0) comprises a shell guide groove arranged in the middle of the shell guide rail;

the locking structure further comprises a push rod sliding block (6) fixedly connected with the push rod (3), the push rod sliding block (6) comprises a sliding block arm (6-1), and the sliding block arm (6-1) is arranged in the guide groove of the shell in a sliding mode.

8. The locking structure of a circuit breaker according to claim 6, wherein: the shell guiding and limiting structure (5-1) comprises an upper limiting structure (5-1-1) and a lower limiting structure which are arranged at intervals relatively, and the push rod locking part (3-2) is arranged between the upper limiting structure (5-1-1) and the lower limiting structure in a sliding mode.

9. The locking structure of a circuit breaker according to claim 8, wherein: the upper limiting structure (5-1-1) is an upper limiting plate; the lower limiting structure comprises at least one pair of lower guide rail ribs (5-1-2) which are arranged in parallel at intervals.

10. The locking structure of a circuit breaker according to claim 1, wherein: the shell (5) further comprises a shell sliding rail structure, the shell sliding rail structure comprises a shell sliding groove (5-3), and the push rod (3) further comprises a push rod sliding portion (3-1) which is arranged in the shell sliding groove (5-3) in a sliding mode and connected with the push rod locking portion (3-2) in a bending mode.

11. The locking structure of a circuit breaker according to claim 10, wherein: the push rod (3) also comprises a push rod limiting arm (3-3) which is connected with the push rod locking part (3-2) and is arranged side by side with the push rod sliding part (3-1) at intervals; the shell (5) further comprises a shell limiting table (5-2) arranged between the push rod limiting arm (3-3) and the push rod sliding part (4-1), and the push rod limiting arm (3-3) is in limiting fit with the shell limiting table (5-2).

12. The locking structure of a circuit breaker according to claim 10, wherein:

the push rod (3) comprises a push rod matching part (3-0), the push rod matching part (3-0) and the push rod locking part (3-2) are respectively connected with two ends of the push rod sliding part (3-1), and the push rod matching part (3-0) is matched with the driving part (2); the shell (5) further comprises a shell spring limiting plate (5-4) connected with one end of the shell sliding rail structure, and the elastic reset piece (4) is arranged between the shell spring limiting plate (5-4) and the push rod matching part (3-0).

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