CN217562500U - Operating mechanism of miniature circuit breaker and miniature circuit breaker - Google Patents

Abstract

The utility model provides a miniature circuit breaker's operating device and miniature circuit breaker, operating device includes: the handle is rotatably arranged on the shell; the connecting rod is provided with a first end connected with the handle and a second end connected with the jump buckle; a contact support rotatably mounted to the housing by a first connecting shaft; the jump buckle and the lock catch are respectively rotatably arranged on the contact support through a second connecting shaft and a third connecting shaft, a matching structure is arranged between the jump buckle and the lock catch, and the matching structure comprises a first convex block arranged on the jump buckle and a second convex block arranged on the lock catch; when short circuit or overload occurs, the lock catch moves towards the opening direction under the action of external force, the second convex block is abutted against the first convex block to drive the trip buckle to rotate towards the opening direction, and the rotating center of the second end of the connecting rod spans from the lower side of a connecting line of the rotating center of the first end and the rotating center of the trip buckle to the upper side; the jump buckle elastic piece is suitable for driving the jump buckle to reset towards the brake separating direction; and the supporting elastic piece is suitable for driving the contact to support the reset towards the opening direction.

Description

Operating mechanism of miniature circuit breaker and miniature circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to miniature circuit breaker's operating device and miniature circuit breaker.

Background

The miniature circuit breaker is a protective electric appliance installed on a terminal distribution line and is mainly used for overload and short-circuit protection of lines and electric equipment.

An operating mechanism of an existing miniature circuit breaker, as shown in fig. 6, mainly includes a handle 01, a connecting rod 02, a contact support 03, a jump buckle 04, a lock catch 05 and a support elastic member, where the jump buckle 04 and the lock catch 05 are both rotatably mounted on the contact support 03, and a buckle structure is disposed between the jump buckle 04 and the lock catch 05, as shown in fig. 7, the buckle structure includes a first buckle 06 disposed on the jump buckle 04, and a second buckle 07 disposed on the lock catch 05 and capable of being matched and abutted against the first buckle 06. In the process of closing, the handle 01 rotates clockwise, the first buckle 06 and the second buckle 07 of the jump buckle 04 are driven to abut against through the connecting rod 02, the jump buckle 04, the buckle 05 and the contact support 03 form a linkage rotating mechanism assembly, the mechanism assembly integrally rotates clockwise towards the closing direction, and at the moment, the support elastic part stores energy; when short circuit or overload occurs, the lock catch 05 rotates counterclockwise under the action of external force, and when the second buckle 07 is separated from the first buckle 06, the support elastic part releases energy, so that the contact support 03 is driven to rotate counterclockwise in the opening direction. Considering that the first hasp 06 and the second hasp 07 need hasp matching, the requirement for the assembling precision of the hasp structure is high, and after long-time use, the hasp structure is easy to lose hasp effect due to abrasion, so that the operation mechanism can not realize opening and closing actions.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the miniature circuit breaker operating device among the prior art and requiring higher, and use the easy defect that wearing and tearing lead to operating device to become invalid after the hasp structure's size precision to a simple structure, the high miniature circuit breaker's of reliability operating device and miniature circuit breaker are provided.

Therefore, the utility model provides an operating device of miniature circuit breaker, including handle, connecting rod, contact support, jump detain, hasp, jump detain the elastic component and support the elastic component. The handle is rotatably arranged on the shell; the connecting rod is provided with a first end connected with the handle and a second end connected with the jump buckle; the contact support is rotatably arranged on the shell through a first connecting shaft; the jump buckle and the lock catch are respectively and rotatably arranged on the contact support through a second connecting shaft and a third connecting shaft, a matching structure is arranged between the jump buckle and the lock catch, and the matching structure comprises a first convex block arranged on the jump buckle and a second convex block arranged on the lock catch; in the process of closing, the first convex block abuts against the second convex block, and the tripping buckle, the lock catch and the contact support form a mechanism assembly and rotate towards the closing direction under the driving of the connecting rod; when short circuit or overload occurs, the lock catch acts towards the opening direction under the action of external force, the second bump is abutted against the first bump to drive the jump buckle to rotate towards the opening direction, and the rotating center of the second end of the connecting rod spans from the lower side to the upper side of a connecting line of the rotating center of the first end and the rotating center of the jump buckle; the jump buckle elastic piece is connected with the jump buckle and is suitable for driving the jump buckle to reset towards the brake separating direction; and the supporting elastic piece is connected with the contact support and is suitable for driving the contact support to reset towards the opening direction.

The contact support structure also comprises a limiting structure for preventing the jump buckle from being separated from the contact support.

The limit structure comprises a stop block which is arranged on the lock buckle and extends towards the jump buckle direction, and the stop block can be abutted against one surface of the jump buckle, which is far away from the contact support.

The contact support is provided with at least one blocking column which is abutted against the lock catch during closing so as to enable the contact support to rotate in a linkage manner with the tripping buckle.

The bumping post is arranged on one side of the lock catch far away from the jump buckle, and is perpendicular to the contact support arrangement, and the bumping post is suitable for supplying the hook connection of the support elastic part.

The contact support is provided with a mounting groove which is arranged around the stop column and is suitable for mounting the hook.

The jump buckle elastic piece is a torsion spring, one end of the torsion spring is propped against the contact support, and the other end of the torsion spring is suitable for being inserted into the second jack of the jump buckle.

The third connecting shaft is positioned between the first connecting shaft and the second connecting shaft.

The contact support is provided with a first jack for inserting one end of the double-gold pull rod, and the edge of the first jack is provided with a third bump which is abutted against the double-gold pull rod main body when tripping.

The utility model also provides a miniature circuit breaker, including contact mechanism, and as above miniature circuit breaker's operating device, contact mechanism is including locating moving contact on the contact support, and with the static contact that the moving contact set up relatively, be equipped with on the casing with the conductive component that the static contact links to each other, conductive component includes: a coil; the two wiring boards are respectively arranged on two sides of the coil, and the wiring board adjacent to one side of the moving contact is provided with the fixed contact.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an operating mechanism of miniature circuit breaker, in the combined floodgate process, the handle rotates clockwise, the rotation center of connecting rod second end is located the first end rotation center and jumps and detains the connection downside of rotation center (also be the below of mechanism dead point position), the connecting rod can exert towards the first lug of jumping the knot and make its effort that offsets with the second lug of hasp, jump the knot, the hasp forms a mechanism subassembly with the contact support, and wind first connecting axle clockwise rotation under the drive of connecting rod, thereby realize combined floodgate; when short circuit or overload occurs, the lock catch rotates anticlockwise around the third connecting shaft under the action of external force, the jump buckle is driven to rotate clockwise around the second connecting shaft after a second convex block of the lock catch abuts against a first convex block of the jump buckle, the connecting rod drives the jump buckle to rotate clockwise after a rotation center of a second end of the connecting rod crosses over from the lower side of a connecting line of the rotation center of the first end and the rotation center of the jump buckle to the upper side, namely, the dead point of a mechanism is crossed, the contact support rotates towards the opening direction under the action of the support elastic piece after the first convex block of the jump buckle is separated from the second convex block of the lock catch, and the jump buckle resets under the action of the jump buckle elastic piece. The utility model discloses a miniature circuit breaker operating device, its combined floodgate principle is similar with prior art, but the separating brake principle is different with prior art's hasp to it is lower to the assembly required precision of jumping knot and hasp, and the structure is simpler, has improved the reliability, and has prolonged operating device's life.

2. The utility model provides an operating device of miniature circuit breaker, hasp have and extend to jump the dog of detaining the top, and the dog can offset with the jump one side of detaining and keeping away from the contact support to prevent to jump and detain and support the separation with the contact, further improved the reliability.

3. The utility model provides an operating device of miniature circuit breaker, when closing a floodgate, the side of hasp offsets with the bumping post that the contact supported to make jump detain, hasp and contact support and form a mechanism subassembly, this mechanism subassembly is around the whole rotation of first connecting axle under the drive of connecting rod, and simultaneously, the bumping post can also be used for supplying the couple hook connection of supporting the elastic component, also just same bumping post can play two effects, and the structure is simpler like this, has reduced manufacturing cost.

4. The utility model provides an operating device of miniature circuit breaker, third connecting axle are located between first connecting axle and the second connecting axle, compare with the mode of the center of rotation coincidence of prior art hasp and contact support, have increased the arm of force distance between the dropout atress portion of hasp and the third connecting axle (the third connecting axle is hasp center of rotation) like this for the hasp is tripped more easily, has increased product stability.

5. The utility model provides an operating device of miniature circuit breaker, contact support have and supply two golden pull rod one end male first jacks, the edge of first jack be equipped with when the dropout, with two golden pull rod main parts counterbalance third lug, the third lug can increase two golden pull rods and hasp rotation center's arm of force distance for the hasp is threaded off more easily, has increased product stability.

6. The utility model provides a miniature circuit breaker, coil are aluminium or aluminum alloy, and the mode that adopts copper with the prior art coil is compared, and manufacturing cost is lower like this.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the miniature circuit breaker of the present invention in an open state;

fig. 2 is a schematic structural diagram of an operating mechanism of the small and medium-sized circuit breaker in fig. 1;

FIG. 3 is a schematic view of the assembly of the contact support, the jumper and the latch;

FIG. 4 is an exploded view of the contact support, jumper and latch;

FIG. 5 is a schematic view of the construction of the second end of the connecting rod about to cross the dead center position during a short circuit or overload;

FIG. 6 is a schematic structural diagram of a small and medium sized circuit breaker in the prior art;

fig. 7 is a schematic structural diagram of a jump buckle and a lock catch in the prior art.

Description of reference numerals: 01. a handle; 02. a connecting rod; 03. a contact support; 04. jumping and buckling; 05. locking; 06. a first buckle; 07. a second buckle;

1. a handle; 2. a housing; 3. a connecting rod; 4. a first end; 5. a second end; 7. a contact support; 8. a first connecting shaft; 9. jumping and buckling; 10. locking; 11. a first bump; 12. a second connecting shaft; 13. a third connecting shaft; 14. a second bump; 15. a jump buckle elastic member; 16. a supporting elastic member; 17. a stopper; 18. a bumping post; 19. a moving contact; 20. static contact; 21. a coil; 22. a wiring board; 23. hooking; 24. mounting grooves; 25. a second jack; 26. a bimetallic pull rod; 27. a first jack; 28. and a third bump.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood 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 work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The embodiment provides a miniature circuit breaker, which comprises an operating mechanism, a contact mechanism and a conductive assembly.

The operating mechanism, as shown in fig. 1 and 2, includes a handle 1, a link 3, a contact support 7, a jumper 9, a latch 10, a jumper spring 15, and a support spring 16.

The handle 1 is rotatably mounted on the housing 2, and a handle torsion spring (not shown in the figure) for driving the handle 1 to reset is arranged on the housing 2.

The contact support 7 is rotatably installed on the shell 2 through the first connecting shaft 8, the second connecting shaft 12, the third connecting shaft 13 and the two blocking columns 18 are formed on the contact support 7, the blocking columns 18 are arranged on one side, far away from the jump buckle 9, of the lock catch 10 and perpendicular to the contact support 7, and installation grooves 24 which are arranged around the blocking columns 18 and suitable for installing the hooks 23 are formed on the contact support 7. The contact support 7 is provided with a first insertion hole 27 for inserting one end of a bimetallic pull rod 26, and the edge of the first insertion hole 27 is provided with a third bump 28 which is abutted against the main body of the bimetallic pull rod 26 when being tripped. A waist-shaped hole which is used for the first connecting shaft 8 to penetrate and can move relative to the contact support 7 is formed in the middle of the contact support.

A connecting rod 3 having a first end 4 connected to the handle 1 and a second end 5 connected to a jump buckle 9.

The jump buckle 9 and the lock catch 10 are respectively rotatably mounted on the contact support 7 through a second connecting shaft 12 and a third connecting shaft 13 as shown in fig. 3 and 4, a matching structure is arranged between the jump buckle 9 and the lock catch 10, and the matching structure comprises a first bump 11 arranged on the jump buckle 9 and a second bump 14 arranged on the lock catch 10; in the process of closing, the first projection 11 abuts against the second projection 14, the trip catch 9, the lock catch 10 and the contact support 7 form a mechanism component, and the mechanism component is driven by the connecting rod 3 to rotate clockwise around the first connecting shaft 8; when short circuit or overload occurs, the lock catch 10 moves counterclockwise around the third connecting shaft 13 under the driving of the push rod or the double-gold pull rod of the short circuit tripping mechanism, the second bump 14 abuts against the first bump 11 to drive the trip buckle 9 to rotate towards the opening direction, and the rotation center of the second end 5 of the connecting rod 3 spans from the lower side to the upper side of the connecting line of the rotation center of the first end 4 and the rotation center of the trip buckle 9, and it should be noted that the connecting line of the rotation center of the first end 4 and the rotation center of the trip buckle 9 is the mechanism dead point position. The lock catch 10 is provided with a limiting structure suitable for stopping the jump buckle 9 and the contact support 7 from separating, the limiting structure comprises a stop block 17 which is arranged on the lock catch 10 and extends towards the jump buckle 9, and the stop block 17 can abut against one surface of the jump buckle 9, which is far away from the contact support 7. In this embodiment, the third connecting shaft 13 is located between the first connecting shaft 8 and the second connecting shaft 12, and compared with a manner that a rotation center of the latch and a contact support in the prior art coincides, a moment arm distance between a tripping stress part of the latch 10 and the third connecting shaft 13 (the third connecting shaft is a latch rotation center) is increased, so that the latch 10 is easier to trip, and product stability is increased, and the tripping stress part is located at the lower end of the latch 10 and can be matched with a push rod or a bimetallic pull rod of a short circuit tripping mechanism. A through hole is formed in the middle of the lock catch 10 for the first connecting shaft 8 to pass through and the lock catch 8 to move relative to the first connecting shaft 8.

And the jump buckle elastic piece 15 is connected with the jump buckle 9 and is suitable for driving the jump buckle 9 to reset towards the opening direction, in the embodiment, the jump buckle elastic piece 15 is a torsion spring, one end of the torsion spring is propped against the contact support 7, and the other end of the torsion spring is suitable for being inserted into the second jack 25 of the jump buckle 9.

And one end of the supporting elastic piece 16 is connected with the shell 1 in a hooking mode, the other end of the supporting elastic piece is connected with a stop column 18 on the contact support 7 in a hooking mode, and the supporting elastic piece 16 is suitable for driving the contact support 7 to reset towards the opening direction.

The contact mechanism comprises a moving contact 19 arranged on the contact support 7 and a fixed contact 20 arranged opposite to the moving contact 19.

The conductive assembly includes: a coil 21; and the two wiring boards 22 are respectively arranged at two sides of the coil 21, and the fixed contact 20 is arranged on the wiring board 22 adjacent to one side of the movable contact 19. The coil 21 is made of aluminum or aluminum alloy, and the wiring board 22 is made of one of copper, copper alloy, iron alloy, aluminum alloy, copper-aluminum composite board and aluminum-iron composite board.

The utility model discloses a miniature circuit breaker operating device's theory of operation as follows:

in the closing process, the handle 1 rotates clockwise, the rotation center of the second end 5 of the connecting rod 3 is positioned below the dead point position of the mechanism, the connecting rod 3 can apply acting force to the first convex block 11 of the trip buckle 9 to enable the first convex block to be abutted against the second convex block 14 of the lock catch 10, the trip buckle 9, the lock catch 10 and the contact support 3 form a mechanism assembly, and the mechanism assembly rotates clockwise around the first connecting shaft 8 under the driving of the connecting rod 3, so that the closing is realized.

When a short circuit or an overload occurs, as shown in fig. 5, the latch 10 rotates counterclockwise around the third connecting shaft 13 under the action of the push rod of the short circuit tripping mechanism or the bimetallic pull rod of the overload protection mechanism, the second bump 14 of the latch 10 abuts against the first bump 11 of the jump buckle 9, and then the jump buckle 9 is driven to rotate clockwise around the second connecting shaft 12, when the rotation center of the second end 5 of the connecting rod 3 crosses from the lower side (mechanism dead point position) of the connection line between the rotation center of the first end 4 and the rotation center of the jump buckle 9 to the upper side, that is, after the mechanism dead point position is exceeded, the connecting rod 3 drives the jump buckle 9 to rotate clockwise, after the first bump 11 of the jump buckle 9 is separated from the second bump 14 of the latch 10, the contact support 7 rotates towards the opening direction under the action of the support elastic member 16, and the jump buckle 9 resets under the action of the jump buckle elastic member 15.

It should be noted that the short circuit trip mechanism and the overload protection mechanism are the existing mature technologies, and therefore, the detailed structure and the working principle thereof are not described in detail.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (9)

1. An operating mechanism of a small-sized circuit breaker, comprising:

a handle (1) rotatably mounted on the housing (2);

a connecting rod (3) having a first end (4) connected to the handle (1) and a second end (5) connected to a jump buckle (9);

a contact support (7) rotatably mounted on the housing (2) by means of a first connecting shaft (8);

the jump buckle (9) and the lock catch (10) are rotatably arranged on the contact support (7) through a second connecting shaft (12) and a third connecting shaft (13) respectively, a matching structure is arranged between the jump buckle (9) and the lock catch (10), and the matching structure comprises a first convex block (11) arranged on the jump buckle (9) and a second convex block (14) arranged on the lock catch (10); in the process of closing, the first convex block (11) is abutted against the second convex block (14), and the tripping buckle (9), the lock catch (10) and the contact support (7) form a mechanism assembly and rotate towards the closing direction under the driving of the connecting rod (3); when short circuit or overload occurs, the lock catch (10) acts towards the opening direction under the action of external force, the second bump (14) is abutted against the first bump (11) to drive the trip buckle (9) to rotate towards the opening direction, and the rotation center of the second end (5) of the connecting rod (3) spans from the lower side to the upper side of a connecting line of the rotation center of the first end (4) and the rotation center of the trip buckle (9);

the jump buckle elastic piece (15) is connected with the jump buckle (9) and is suitable for driving the jump buckle (9) to reset towards the brake separating direction;

and the supporting elastic piece (16) is connected with the contact support (7) and is suitable for driving the contact support (7) to reset towards the opening direction.

2. The operating mechanism of a miniature circuit breaker according to claim 1 further comprising a limiting structure for preventing said trip catch (9) from separating from said contact support (7).

3. The operating mechanism of a miniature circuit breaker according to claim 2, wherein said limiting structure comprises a stop (17) disposed on said latch (10) and extending toward said jumper (9), said stop (17) being capable of abutting against a surface of said jumper (9) away from said contact support (7).

4. The operating mechanism of a miniature circuit breaker according to any of claims 1-3 wherein said contact support (7) is provided with at least one stop (18) which abuts against said latch (10) when closing to allow said contact support (7) and said trip catch (9) to rotate in an interlocking manner.

5. Operating mechanism of a miniature circuit breaker according to claim 4 wherein said catch (18) is provided on a side of said latch (10) remote from said trip catch (9), said catch (18) being adapted for hooking engagement by a hook (23) of said supporting spring (16).

6. Operating mechanism of a miniature circuit breaker according to claim 1 wherein said third connecting shaft (13) is located between said first connecting shaft (8) and said second connecting shaft (12).

7. The operating mechanism of a miniature circuit breaker according to claim 1 wherein said contact support (7) has a first receptacle (27) into which one end of a bimetallic tie (26) is inserted, the edge of said first receptacle (27) being provided with a third projection (28) which abuts against the body of said bimetallic tie (26) when tripped.

8. The operating mechanism of a miniature circuit breaker according to claim 1 wherein said trip resilient member (15) is a torsion spring having one end abutting said contact support (7) and the other end adapted to be inserted into a second receptacle (25) of said trip latch (9).

9. A miniature circuit breaker, comprising a contact mechanism and an operating mechanism of the miniature circuit breaker according to any one of claims 1 to 8, wherein the contact mechanism comprises a movable contact (19) disposed on the contact support (7) and a fixed contact (20) disposed opposite to the movable contact (19), a conductive component connected to the fixed contact (20) is disposed on the housing (2), and the conductive component comprises:

a coil (21);

the two wiring boards (22) are respectively arranged at two sides of the coil (21), and the wiring board (22) adjacent to one side of the movable contact (19) is provided with the fixed contact (20).

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