CN214624951U - Circuit breaker - Google Patents

Abstract

The utility model relates to a circuit breaker, including repulsion tripping device and the operating handle who has energy memory, repulsion tripping device includes contact seat, hasp, moving contact and moving contact torsional spring, hasp swivelling joint has the portion of touching on the hasp on the contact seat, and the moving contact passes through contact torsional spring swivelling joint epaxial at the contact of contact seat, the moving contact torsional spring gives and forces the moving contact towards the revolving force of static contact one side motion, and the moving contact can be rotatory and push up the portion of touching and drive the hasp rotation when receiving external force around the contact axle, and forces the rotatory hasp that makes of above-mentioned hasp to move to the unblock state from the locking state. This application can accomplish the physics dropout through setting up contact seat, hasp, moving contact and moving contact torsional spring, simple structure, and reasonable in design reduces tripping device's occupation space greatly, and the equipment is convenient, very big reduction equipment and manufacturing cost, and the repulsion through the electric current realizes the dropout moreover, can break off in the twinkling of an eye, very big shortening corresponding time, improves the cutting-off ability, very big improvement circuit system's security.

Description

Circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to circuit breaker.

Background

The circuit breaker is the most commonly used switching device in a circuit system, and when a circuit has faults such as overload or short circuit, the circuit breaker needs to quickly perform protection actions for cutting off the circuit, so that serious loss caused by overlarge current in the circuit is avoided. In order to realize the self-tripping function, a thermomagnetic trip is usually adopted in the prior art to complete, but the thermomagnetic trip has a plurality of structures and is complicated, parts are difficult to assemble, the cost is high, the tripping process of the thermomagnetic trip needs the magnetization process of a magnetic yoke, and in addition, the armature is far away from the initial distance of the magnetic yoke, so that the response speed of the thermomagnetic trip is too low, the breaker cannot be broken in time, and accidents are caused.

SUMMERY OF THE UTILITY MODEL

To the deficiency in the background art, the utility model provides a circuit breaker.

The utility model adopts the technical proposal that: the utility model provides a circuit breaker, includes circuit breaker shell, electromagnetic component, arc extinguishing mechanism, static contact and terminal, still includes repulsion tripping device and the operating handle who has energy memory, repulsion tripping device includes contact seat, hasp, moving contact and moving contact torsional spring, hasp swivelling joint has the portion of touching on the hasp on the contact seat, the moving contact passes through contact torsional spring swivelling joint on the contact axle of contact seat, the moving contact torsional spring gives and forces the moving contact towards the revolving force of static contact one side motion, and the moving contact can be rotatory and push up the portion of touching and drive the hasp rotation when receiving external force around the contact axle, and forces the rotatory hasp that makes of above-mentioned hasp to move to the unblock state from the locking state.

Furthermore, a limiting step and a torsion spring step are arranged on the lower surface of the contact seat, a limiting raised head extends from the upper end of the moving contact, and the limiting raised head abuts against the limiting step, so that the moving contact can only move towards one side of the touch part; one end of the moving contact torsion spring is abutted against the lower part of the torsion spring step, and the other end of the moving contact torsion spring is abutted against the outer side of the moving contact.

Furthermore, a lower rotating shaft extends downwards from the lower surface of the contact seat, a contact seat torsion spring is sleeved on the lower rotating shaft, one end of the contact seat torsion spring is abutted against the upper part of the torsion spring step, and the other end of the contact seat torsion spring is abutted against the limiting step; the improved contactor is characterized in that an upper rotating shaft extends above the lock catch, a lock catch torsion spring is sleeved on the upper rotating shaft, one end of the lock catch torsion spring is abutted to a first convex rod on the contact seat, the other end of the lock catch torsion spring is abutted to a second convex rod on the lock catch, a hook is arranged at the upper end of the lock catch, a first concave surface is arranged at the corner of the hook, and a second concave surface is arranged on a step at the upper end of the contact seat.

Furthermore, the lower rotating shaft and the upper rotating shaft are coaxially provided with connecting holes, and the contact seat and the lock catch are arranged on the shell of the circuit breaker through the mounting shaft; a notch groove extends above the second concave surface, and the notch groove and the second concave surface are in arc transition.

Furthermore, the moving contact and the fixed contact are in a parallel state when being closed, and the current flow direction is opposite at the moment.

Furthermore, the operating handle comprises a single-pole outer handle, a single-pole inner handle, an energy storage spring, an energy storage brake rod and an energy storage reset spring, wherein a first limit step and a second limit step are arranged on the single-pole inner handle, a first inner step is arranged on the single-pole outer handle, the single-pole outer handle is rotatably connected with the single-pole inner handle through a rotating shaft, the first inner step is positioned between the first limit step and the second limit step, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against one side of the first limit step, the other end of the energy storage spring abuts against the outer wall step of the single-pole outer handle, the energy storage brake rod is rotatably connected on a shell of the circuit breaker, one end of the energy storage brake rod is provided with a brake hook extending downwards, the other end of the energy storage brake rod is provided with a spring column, the upper side of the energy storage brake rod is provided with a pushing inclined plane higher than the brake hook, and one end of the energy storage reset spring is sleeved on the spring column, the other end of the single-pole outer handle is abutted against the side wall of the shell of the circuit breaker, a braking lug which can be abutted against a braking hook is arranged on the outer wall of a second limiting step positioned below the energy storage braking rod, and a pushing lug which is abutted against a pushing inclined plane is arranged on the single-pole outer handle.

Furthermore, the single-pole inner handle is connected with the lock catch through a connecting rod.

Further, still include the arc extinguishing casing, the arc extinguishing mechanism sets up in the cavity of arc extinguishing casing.

Further, the arc extinguishing housing comprises an upper cover and a lower cover, and the cavity is formed between the upper cover and the lower cover; an arc striking socket for inserting an arc striking plate is arranged on the arc extinguishing shell; a moving contact jack for inserting the moving contact is arranged; and a static contact socket for inserting the static contact.

Furthermore, a positioning column is arranged on the shell of the circuit breaker, and a positioning hole for the positioning column to penetrate through is formed in the arc extinguishing shell.

The utility model has the advantages that:

1. this application can accomplish the physics dropout through setting up contact seat, hasp, moving contact and moving contact torsional spring, simple structure, and reasonable in design reduces tripping device's occupation space greatly, and the equipment is convenient, very big reduction equipment and manufacturing cost, and the repulsion through the electric current realizes the dropout moreover, can break off in the twinkling of an eye, very big shortening corresponding time, improves the cutting-off ability, very big improvement circuit system's security.

2. This application is through setting up energy storage mechanism on operating handle position for the handle utilizes the spring energy storage to drive the moving contact subassembly action when being close to the stroke end, realizes the quick combined floodgate of moving contact and static contact, avoids slowly closing a floodgate to bring the arcing danger, improves and produces the property ability.

3. This application is through setting up the arc extinguishing casing, through with the cladding of arc extinguishing mechanism in the arc extinguishing casing, separates arc extinguishing mechanism and circuit breaker casing through setting up the arc extinguishing casing promptly, not only plays good arc separation effect, also can avoid because the phenomenon of the high temperature burnout shell that the arc extinguishing mechanism produced.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the repulsion tripping mechanism.

Fig. 3 is a schematic diagram of a positive structure of the repulsion tripping mechanism.

Fig. 4 is a back structure schematic diagram of the repulsion tripping mechanism.

Fig. 5 is a schematic view of the structure at the operating handle.

Fig. 6 is a schematic structural view of a circuit breaker housing.

Fig. 7 is a schematic structural view of one side of the energy storage mechanism.

Fig. 8 is a schematic view of a monopolar external handle.

Fig. 9 is a schematic view of the structure of the inner handle of the single pole.

Fig. 10 is a schematic structural view of the other side of the energy storage mechanism.

Fig. 11 is a schematic view of the arc extinguishing mechanism.

Fig. 12 is a schematic view of a structure of one side of an arc extinguishing housing.

Fig. 13 is a schematic view of the other side of the arc extinguishing housing.

In FIGS. 1-13: d1, a breaker shell; d2, a connecting rod; d3, a static contact; d4, electromagnetic assembly; d5, an arc extinguishing mechanism; d6, a binding post; d7, an operating handle; a1, a contact seat; a2, locking; a3, moving contact; a4, moving contact torsion spring; a5, touch part; a6, contact shaft; a7, a limit step; a8, torsion spring steps; a9, a limit raised head; a10, a lower rotating shaft; a11, a contact seat torsion spring; a12, an upper rotating shaft; a13, a latch torsion spring; a14, a first convex rod; a15, a second convex rod; a16, a hook; a17, a first concave surface; a18, second concave surface; a19, connecting hole; a20, mounting shaft; a21, a notch-removing groove; a26, top block; b1, a monopolar external handle; b2, a monopolar inner handle; b3, an energy storage spring; b4, an energy storage brake lever; b5, an energy storage return spring; b6, a first limit step; b7, a second limit step; b8, first inner step; b9, a rotating shaft; b10, a brake hook; b12, spring posts; b13, pushing the inclined plane; b14, a braking bump; b15, pushing the lug; b16, a handle spring; b24, a fixed shaft; b25, a shaft hole; b26, a monopolar rivet tube; c3, arc extinguishing shell; c4, cavity; c5, an upper cover; c6, a lower cover; c7, arc striking plate; c8, arc starting socket; c9, moving contact socket; c10, a static contact socket; c13, positioning column; c14, positioning holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

The utility model provides a circuit breaker.

In this embodiment, referring to fig. 1 to 13, the circuit breaker includes a circuit breaker housing D1, an electromagnetic assembly D4, an arc extinguishing mechanism D5, a fixed contact D3, a terminal D6, a repulsive force tripping mechanism, and an operating handle D7 having an energy storage mechanism, where the repulsive force tripping mechanism includes a contact base a1, a latch a2, a movable contact A3, and a movable contact torsion spring a4, the latch is rotatably connected to the contact base, the latch has a touch portion a5, the movable contact is rotatably connected to a contact shaft A6 of the contact base through the contact torsion spring, the movable contact gives a rotational force for forcing the movable contact to move toward one side of the fixed contact, and when the movable contact receives an external force, the movable contact can rotate around the contact shaft to push against the touch portion to drive the latch to rotate, so as to force the latch to rotate, and the latch to move from a locked state to an unlocked state.

As shown in fig. 2 in combination with fig. 3 and 4, when the moving contact is subjected to an external force (current repulsion), the counter-clockwise rotation of the torsion spring of the moving contact can be overcome, so that the upper end of the moving contact pushes against the touch part of the latch to drive the latch to rotate, thereby completing the tripping action. Moreover, the whole tripping mechanism is simple in structure, few and simple in parts, simple to assemble, small in occupied space, simple in circuit breaker layout and greatly reduced in production cost.

In addition, in order to make the movable contact interact with the touch part more sensitively, a top block A26 can be arranged at the upper end of the movable contact.

Specifically, a limiting step A7 and a torsion spring step A8 are arranged on the lower surface of the contact seat, a limiting raised head A9 extends from the upper end of the moving contact, the limiting raised head abuts against the limiting step, and the moving contact can only move towards one side of the touch part; one end of the moving contact torsion spring is abutted against the lower part of the torsion spring step, and the other end of the moving contact torsion spring is abutted against the outer side of the moving contact.

After adopting above-mentioned technical scheme, under the limiting displacement of spacing step and spacing plush copper, the moving contact can only move towards trigger portion one side, in addition, under the effect of moving contact torsional spring, make the moving contact can stably connect on the contact seat under no exogenic action.

Specifically, a lower rotating shaft A10 extends downwards from the lower surface of the contact seat, a contact seat torsion spring A11 is sleeved on the lower rotating shaft, one end of the contact seat torsion spring abuts against the upper part of a torsion spring step, and the other end of the contact seat torsion spring abuts against a limiting step; an upper rotating shaft A12 extends above the lock catch, a lock catch torsion spring A13 is sleeved on the upper rotating shaft, one end of the lock catch torsion spring abuts against a first convex rod A14 on the contact seat, and the other end of the lock catch torsion spring abuts against a second convex rod A15 on the lock catch; the upper end of the lock catch is provided with a hook A16, a first concave surface A17 is arranged at the corner of the hook, and a second concave surface A18 is arranged on the step at the upper end of the contact seat.

After the technical scheme is adopted, the torsional spring of the contact seat is used for returning the contact seat, and after tripping action is completed, the moving contact is driven to act to keep the moving contact disconnected, so that the moving contact is prevented from being closed with the static contact again after being disconnected from the opening, and electric arc reignition is prevented.

The latch torsional spring is used for pressing the hook to the contact seat, so that a lock hole is formed between the first concave surface and the second concave surface and is used for connecting the connecting rod.

Specifically, the lower rotating shaft and the upper rotating shaft are coaxially provided with a connecting hole A19, and the contact seat and the lock catch are installed on the shell of the circuit breaker through an installation shaft A20; a notch A21 extends above the second concave surface, and an arc transition is adopted between the notch A and the second concave surface.

Among the above-mentioned technical scheme, after the dropout, the connecting rod follows the second concave surface roll-off, and gets into the notch groove and accomplish the dropout, adopts the circular arc transition between notch groove and the second concave surface, makes the dropout more smooth and easy, and the response is faster, avoids appearing the jamming problem, and in addition, the connecting rod directly slides in the spout, effectively avoids moving contact to take off the back and close with the static contact again after mouthful.

Specifically, the moving contact and the fixed contact are in a parallel state when being closed, and the current flow direction is opposite at the moment.

The moving contact and the static contact are in a parallel state when being closed, the current directions are opposite, and when the current is increased, the current repulsion force of the moving contact and the static contact can bounce the moving contact open to enable the moving contact to rotate to push against the touch part of the lock catch.

Specifically, operating handle includes outer handle B1 of monopole, monopole inner handle B2, energy storage spring B3, energy storage brake lever B4 and energy storage reset spring B5, be equipped with first spacing step B6 and second spacing step B7 on the inner handle of monopole, be equipped with first inner step B8 on the outer handle of monopole, outer handle of monopole is through pivot B9 and monopole inner handle swivelling joint, first inner step is located between first spacing step and the second spacing step, the energy storage spring suit is in the pivot and one end offsets with one side of first spacing step, and the other end offsets with outer handle outer wall step of monopole, the brake lever swivelling joint is on the circuit breaker shell, and the one end of energy storage brake lever is equipped with downwardly extending's braking couple B10, and the other end is equipped with spring post B12, and the upside of energy storage is equipped with and exceeds above-mentioned braking couple's promotion inclined plane B13, one end of the energy storage reset spring is sleeved on the spring column, the other end of the energy storage reset spring abuts against the side wall of the shell of the circuit breaker, a braking convex block B14 which can abut against the braking hook is arranged on the outer wall of the second limiting step positioned below the energy storage braking rod, and a pushing convex block B15 which abuts against the pushing inclined plane is arranged on the single-pole outer handle.

Among the above-mentioned technical scheme, through set up energy storage mechanism on operating handle position for the handle utilizes the spring energy storage to drive the action of moving contact subassembly when being close to the stroke end, realizes the quick combined floodgate of moving contact and static contact, avoids slowly closing a floodgate and brings the danger of arcing, improves and produces the property ability.

The working principle of this application does: when the single-pole outer handle is pulled to rotate anticlockwise, the single-pole outer handle drives the single-pole inner handle to rotate under the action of the energy storage spring until a braking lug on the single-pole inner handle is abutted against the braking hook; at the moment, the single-pole outer handle is continuously rotated anticlockwise to compress the energy storage spring until a pushing lug of the single-pole outer handle is abutted against the pushing inclined plane; then continue anticlockwise rotation monopole outer handle, make the promotion lug promote the promotion inclined plane and force the energy storage brake lever to overcome energy storage reset spring and make the energy storage brake lever rotatory, make the braking lug break away from the braking couple, handle external force disappears in the monopole, the compression potential energy of energy storage spring releases in the twinkling of an eye, forces handle rotation in the monopole, and when using, handle passes through the connecting rod and is connected with moving contact assembly's hasp in the monopole, drives moving contact assembly action, realizes the function of quick dropout.

In addition, in order to enable the handle to return to the original position, a handle spring B16 can be sleeved at the bottom of the rotating shaft.

The circuit breaker shell is provided with a fixed shaft B24, and the outer handle of the single pole is rotatably connected in a shaft hole B25 of the fixed shaft through a rotating shaft; the breaker shell is also provided with a single-pole rivet pipe B26, and the energy storage brake rod is rotationally connected with the breaker shell through the single-pole rivet pipe.

Further, the monopole inner handle is connected with the lock catch through a connecting rod D2.

Further, the arc extinguishing device further comprises an arc extinguishing housing C3, and the arc extinguishing mechanism D5 is arranged in the cavity C4 of the arc extinguishing housing.

Among the above-mentioned technical scheme, set up the arc extinguishing casing, through with the cladding of arc extinguishing mechanism in the arc extinguishing casing, separate arc extinguishing mechanism and circuit breaker casing through setting up the arc extinguishing casing promptly, not only play good arc isolation effect, also can avoid because the phenomenon of the high temperature burnout shell that the arc extinguishing mechanism produced.

Further, the arc extinguishing housing comprises an upper cover C5 and a lower cover C6, and the cavity C4 is formed between the upper cover and the lower cover; an arc striking socket C8 for inserting an arc striking plate C7 is arranged on the arc extinguishing shell; a moving contact socket C9 for inserting a moving contact is arranged; and a fixed contact socket C10 for inserting a fixed contact.

In actual assembly, the arc striking plate, the moving contact and the static contact are installed in the arc extinguishing shell, so that the arc isolating effect is improved.

Furthermore, a positioning column C13 is arranged on the circuit breaker shell, and a positioning hole C14 for the positioning column to pass through is arranged on the arc extinguishing shell.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims (10)

1. The utility model provides a circuit breaker, includes circuit breaker shell, electromagnetic component, arc extinguishing mechanism, static contact and terminal, its characterized in that: the repulsion tripping mechanism comprises a contact seat, a lock catch, a moving contact and a moving contact torsion spring, the lock catch is rotationally connected to the contact seat, a touch part is arranged on the lock catch, the moving contact is rotationally connected to a contact shaft of the contact seat through the contact torsion spring, the moving contact torsion spring gives a rotating force for forcing the moving contact to move towards one side of the static contact, and when the moving contact receives external force, the moving contact can rotate around the contact shaft and push the touch part to drive the lock catch to rotate, so that the lock catch is forced to rotate to enable the lock catch to move from a locking state to an unlocking state.

2. The circuit breaker of claim 1, wherein: the lower surface of the contact seat is provided with a limiting step and a torsion spring step, the upper end of the moving contact extends to form a limiting raised head, the limiting raised head is abutted against the limiting step, and the moving contact can only move towards one side of the touch part; one end of the moving contact torsion spring is abutted against the lower part of the torsion spring step, and the other end of the moving contact torsion spring is abutted against the outer side of the moving contact.

3. The circuit breaker of claim 2, wherein: a lower rotating shaft extends downwards from the lower surface of the contact seat, a contact seat torsion spring is sleeved on the lower rotating shaft, one end of the contact seat torsion spring is abutted against the upper part of the torsion spring step, and the other end of the contact seat torsion spring is abutted against the limiting step; the improved contactor is characterized in that an upper rotating shaft extends above the lock catch, a lock catch torsion spring is sleeved on the upper rotating shaft, one end of the lock catch torsion spring is abutted to a first convex rod on the contact seat, the other end of the lock catch torsion spring is abutted to a second convex rod on the lock catch, a hook is arranged at the upper end of the lock catch, a first concave surface is arranged at the corner of the hook, and a second concave surface is arranged on a step at the upper end of the contact seat.

4. The circuit breaker of claim 3, wherein: the lower rotating shaft and the upper rotating shaft are coaxially provided with connecting holes, and the contact seat and the lock catch are arranged on the shell of the circuit breaker through the mounting shaft; a notch groove extends above the second concave surface, and the notch groove and the second concave surface are in arc transition.

5. The circuit breaker of claim 3, wherein: the moving contact and the static contact are in a parallel state when being closed, and the current flow direction is opposite at the moment.

6. The circuit breaker of claim 1, wherein: the operating handle comprises a single-pole outer handle, a single-pole inner handle, an energy storage spring, an energy storage brake rod and an energy storage reset spring, wherein a first limit step and a second limit step are arranged on the single-pole inner handle, a first inner step is arranged on the single-pole outer handle, the single-pole outer handle is rotationally connected with the single-pole inner handle through a rotating shaft, the first inner step is positioned between the first limit step and the second limit step, the energy storage spring is sleeved on the rotating shaft, one end of the energy storage spring abuts against one side of the first limit step, the other end of the energy storage spring abuts against the outer wall step of the single-pole outer handle, the energy storage brake rod is rotationally connected on a shell of the circuit breaker, one end of the energy storage brake rod is provided with a brake hook extending downwards, the other end of the energy storage brake rod is provided with a spring column, the upper side of the energy storage brake rod is provided with a pushing inclined plane higher than the brake hook, and one end of the energy storage reset spring is sleeved on the spring column, the other end of the single-pole outer handle is abutted against the side wall of the shell of the circuit breaker, a braking lug which can be abutted against a braking hook is arranged on the outer wall of a second limiting step positioned below the energy storage braking rod, and a pushing lug which is abutted against a pushing inclined plane is arranged on the single-pole outer handle.

7. The circuit breaker of claim 6, wherein: the monopole inner handle is connected with the lock catch through the connecting rod.

8. The circuit breaker of claim 1, wherein: still include the arc extinguishing casing, the arc extinguishing mechanism sets up in the cavity of arc extinguishing casing.

9. The circuit breaker of claim 8, wherein: the arc extinguishing shell comprises an upper cover and a lower cover, and the cavity is formed between the upper cover and the lower cover; an arc striking socket for inserting an arc striking plate is arranged on the arc extinguishing shell; a moving contact jack for inserting the moving contact is arranged; and a static contact socket for inserting the static contact.

10. The circuit breaker of claim 9, wherein: be equipped with the reference column on the circuit breaker shell, be equipped with the locating hole that is used for the reference column to pass on the arc extinguishing casing.

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