CN212485251U

CN212485251U - Operating mechanism of miniature circuit breaker

Info

Publication number: CN212485251U
Application number: CN202021651625.1U
Authority: CN
Inventors: 赵虎; 周红兵
Original assignee: Zhejiang Youlu Electric Co ltd; Zhejiang Lingyi Intelligent Electric Appliance Research Institute Co ltd
Current assignee: Zhejiang Youlu Electric Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-02-05
Anticipated expiration: 2030-08-10

Abstract

The utility model provides an operating device of miniature circuit breaker, including handle, connecting rod, contact carrier, hasp, support elastic component, connecting rod elastic component and integrated configuration, integrated configuration is including locating the drive block on the contact carrier to and locate the first cooperation piece on the hasp, first cooperation piece can be when the contact carrier rotates towards separating brake position direction, receives the drive block drive to rotate. The inventor ingeniously has utilized to the great restoring force of support elastic component to realize the quick action of multistage circuit breaker, and the drive block and the first cooperation piece that mutually support have simple structure's advantage.

Description

Operating mechanism of miniature circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to miniature circuit breaker's operating device.

Background

The miniature circuit breaker refers to 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. The operating mechanism of the miniature circuit breaker is a component for opening and closing the circuit breaker, the operating mechanism ensures that the circuit breaker is reliably closed and also ensures that the circuit breaker is rapidly opened in a fault state, and the performance of the operating mechanism directly influences the function of the miniature circuit breaker.

The existing operating mechanism mainly comprises a handle, a U-shaped rod, a contact support, a jump buckle, a lock catch and a lock catch connecting piece, in order to realize the opening linkage of the multi-stage circuit breaker, a multi-stage linkage structure is arranged on the lock catch, the multi-stage linkage structure comprises a first jack formed on the front surface of the lock catch and a second jack arranged on the back surface of the lock catch connecting piece, the lock catch connecting piece is assembled with the lock catch, during assembly, the two ends of an assembling shaft are respectively inserted into the first jack and the second jack of two adjacent circuit breakers, linkage between a plurality of lock catches is realized, namely when one of the lock catches is unlocked with the jump buckle under the action of external force, the lock catches which can drive the other circuit breakers through the assembling shaft. However, when the circuit breaker is opened, because the opening acting force applied to the latch by the push rod or the bimetallic pull rod of the electromagnetic tripping mechanism is small, when the number of stages of the circuit breaker is large, the circuit breaker is difficult to be driven to be opened synchronously and quickly through the multistage linkage structure.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the electromagnetism tripping device push rod or two golden pull rods among the prior art and applying in the defect that the separating brake effort of hasp all is less, can not drive the synchronous quick separating brake of more drive multistage circuit breaker to provide one kind and can drive the operating device of the synchronous quick separating brake's of more multistage circuit breaker miniature circuit breaker.

Therefore, the utility model provides an operating mechanism of a miniature circuit breaker, which comprises a handle, a connecting rod, a contact support, a lock catch, a support elastic part and a connecting rod elastic part, wherein the handle is rotatably arranged on a shell; a link having a first end connectable to the handle and a second end connectable to the contact carrier; the contact support is rotatably arranged on the shell through a rotating shaft, a movable contact plate is arranged at the lower end of the contact support, a first channel allowing the connecting rod to penetrate and move is formed at the upper end of the contact support, and the middle part of the first channel is provided with a step which is driven by the second end of the connecting rod to drive the contact support to rotate; the lock catch is rotatably arranged above the contact support and is provided with a first action position driven by the second end of the connecting rod to rotate and a second action position for driving the second end to be separated from the step under the action of external force, and a multi-stage linkage structure is arranged on the lock catch; a holder elastic member having one end connected to the housing and the other end connected to the contact holder, for applying a biasing force to the contact holder toward the opening position; the connecting rod elastic piece is arranged on the contact support and is used for applying a biasing force moving towards the opening position to the second end of the connecting rod; the combination structure comprises a driving block arranged on the contact support and a first matching block arranged on the lock catch, wherein the first matching block can be driven to rotate by the driving block when the contact support rotates towards the direction of the opening position.

The multi-stage linkage structure includes: the first jack is formed on the front surface of the lock catch and can be in adaptive insertion connection with the assembling shaft; the second jack is formed on the back of the lock catch and is a long hole for inserting another assembling shaft.

And a positioning structure which is suitable for mounting the first matching block and the driving block according to the set assembly position is arranged between the contact support and the lock catch, and the positioning structure comprises a positioning hole arranged on the lock catch and a convex shaft which is arranged on the contact support and can be inserted into the positioning hole.

The support elastic part is a tension spring, one end of the tension spring is connected with a first mounting column on the shell in a hooking mode, and the other end of the tension spring is connected with a hanging hole of the contact support in a hooking mode.

The connecting rod elastic element is a torsion spring sleeved on the second mounting column of the contact support, and the torsion spring is provided with a torsion spring main body part mounted on the second mounting column and an elastic arm which extends to the upper part of the first channel and can be abutted against the second end of the connecting rod.

The lower extreme of hasp is equipped with the second cooperation piece that can set up with electromagnetism shedding mechanism's push rod is relative, and the shaping has the perforation that supplies two golden pull rods to wear to establish on the second cooperation piece.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an operating device of miniature circuit breaker, through setting up integrated configuration, when the separating brake, contact carrier is fast when the separating brake position direction rotates under the effort of support elastic component, and the last drive block of contact carrier can drive the hasp fast action through first cooperation piece, and the inventor is ingenious with the help of the great restoring force of support elastic component, realizes multistage circuit breaker fast action, and mutually supporting drive block and first cooperation piece have simple structure's advantage.

2. The utility model provides an operating device of miniature circuit breaker, multistage linkage structure includes: the first jack is formed on the front surface of the lock catch and can be in adaptive insertion connection with the assembling shaft; the second jack is formed on the back of the lock catch and is a long hole for inserting another assembling shaft. Because first jack and second jack all take shape on the hasp, compare with the mode that prior art hasp connecting piece and hasp were assembled and are connected, the structure is simpler like this, has reduced manufacturing cost.

3. The utility model provides an operating device of miniature circuit breaker still is equipped with between contact carrier and the hasp and is suitable for to make first cooperation piece and drive block according to the location structure of setting for the mounted position installation, and location structure is including locating the locating hole on the hasp to and locate the protruding axle that can peg graft with the locating hole on the contact carrier, can avoid installer to adorn wrong hasp position on contact carrier like this, improved production efficiency.

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 operating mechanism of the miniature circuit breaker in an open state;

FIG. 2 is a schematic view of the structure of FIG. 1 with the housing removed;

FIG. 3 is a schematic view of the assembly of the contact support, the moving contact and the link elastic member;

FIG. 4 is a front view of the latch;

fig. 5 is a rear view of the latch.

Description of reference numerals: 32. a movable contact plate; 4. a handle; 5. a connecting rod; 51. a first end; 52. a second end; 53. a link elastic member; 54. a torsion spring main body portion; 55. a resilient arm; 6. a contact holder; 61. a first channel; 62. a step; 63. a bracket elastic member; 64. a drive block; 65. a protruding shaft; 66. hanging holes; 67. a second mounting post; 7. locking; 71. a first jack; 72. a second jack; 73. a first mating block; 74. positioning holes; 75. a second mating block; 8. a push rod; 9. a housing; 90. a rotating shaft; 91. a first mounting post.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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 invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides an operating mechanism of a small circuit breaker, as shown in fig. 1 and 2, including a handle 4, a link 5, a contact holder 6, a latch 7, a holder elastic member 63, and a link elastic member 53.

The handle 4 is rotatably arranged on the shell 9, and a slot is formed on the handle 4.

And a connecting rod 5 having a first end 51 connectable to the handle 4 and a second end 52 connectable to the contact support 6, wherein the connecting rod 5 is a U-shaped rod and the first end 51 is adapted to be inserted into the slot of the handle 4.

The contact holder 6 is rotatably mounted on the housing 9 through a rotating shaft 90, as shown in fig. 3, the lower end of the contact holder is provided with the movable contact plate 32, the upper end of the contact holder is formed with a first channel 61 allowing the second end 52 of the connecting rod 5 to penetrate through and move, the middle of the first channel 61 is provided with a step 62 driven by the second end 52 of the connecting rod 5 to drive the contact holder 6 to rotate, the contact holder 6 is further provided with a driving block 64 capable of being matched with the latch 7, and a protruding shaft 65 for positioning the mounting position of the latch 7, and the protruding shaft 65 is located between the driving block 64 and the rotating shaft 90. In this embodiment, the rotating shaft 90 is a metal shaft.

The lock catch 7 is rotatably mounted above the contact support 6 through a rotating shaft 90, and the lock catch 7 has a first action position driven by the second end 52 of the connecting rod 5 to rotate and a second action position driven by an external force to separate the second end 52 from the step 62. As shown in fig. 2, 4 and 5, the latch 7 is provided with a first engaging block 73 and a positioning hole 74, the first engaging block 73 can be driven by the driving block 64 to rotate when the contact holder 6 rotates toward the opening position, and the positioning hole 74 can be inserted by the protruding shaft 65, so that the first engaging block 73 is positioned on the left side of the driving block 64 as shown in fig. 2. Be equipped with multistage linkage on hasp 7, multistage linkage includes: the first jack 71 is arranged on the front surface of the lock catch 7 and can be in adaptive splicing with the splicing shaft; the second insertion hole 72 is formed in the back surface of the lock catch 7, and the second insertion hole 72 is a long hole into which another assembling shaft can be inserted. The lower extreme of hasp 7 is equipped with the second cooperation piece 75 that can set up with electromagnetism shedding mechanism's push rod 8 is relative, the shaping has the perforation that supplies two golden pull rods to wear to establish on the second cooperation piece 75.

Support elastic component 63, one end with casing 9 is connected, the other end with contact carrier 6 connects, be used for to contact carrier 6 applies the biasing force towards the movement of separating brake position, and in this embodiment, support elastic component 63 is the extension spring, the one end of extension spring with first erection column 91 hook on the casing 9 is connected, the other end with contact carrier 6's hanging hole 66 hook is connected.

The connecting rod elastic member 53 is a torsion spring sleeved on the second mounting column 67 of the contact support 6, and the torsion spring has a torsion spring main body portion 54 mounted on the second mounting column 67, and an elastic arm 55 extending to the upper side of the first channel 61 and capable of abutting against the second end 52 of the connecting rod 5.

The utility model provides a miniature circuit breaker's operating device, through setting up integrated configuration, when the separating brake, contact carrier 6 is fast when opening brake position orientation rotation under support elastic component 63's effort, drive block 64 on contact carrier 6 can drive hasp 7 fast acting through first cooperation piece 73, the ingenious great restoring force with the help of support elastic component 63 of inventor, in order to realize multistage circuit breaker fast acting, mutually supported drive block 64 and first cooperation piece 73 have simple structure's advantage.

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

when closing the switch:

the handle 4 rotates clockwise, the connecting rod 5 abuts against the step 62 of the contact support 6, the contact support 6 is driven to rotate clockwise around the rotating shaft 90 until the movable contact plate 32 arranged on the contact support 6 is communicated with a fixed contact in a contact mode, at the moment, the support elastic part 63 accumulates energy, the connecting rod 5 abuts against the top of the lock catch 7 in the moving process, and the lock catch 7 is driven to rotate clockwise around the rotating shaft 90.

When the brake is opened:

the lock catch 7 rotates counterclockwise to the tripping position under the driving of the bimetallic pull rod or the push rod of the electromagnetic tripping mechanism, so that the second end 52 of the connecting rod 5 is separated from the step 62 on the contact support 6, after the contact support 6 loses the pushing force of the connecting rod 5, the support elastic part 63 releases energy to drive the contact support 6 to rotate counterclockwise, and the connecting rod 5 returns to the tripping position under the action of the connecting rod elastic part 53.

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. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

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

a handle (4) rotatably mounted on the housing (9);

a connecting rod (5) having a first end (51) connectable to the handle (4) and a second end (52) connectable to the contact carrier (6);

the contact support (6) is rotatably arranged on the shell (9) through a rotating shaft (90), the lower end of the contact support is provided with a movable contact plate (32), the upper end of the contact support is provided with a first channel (61) allowing the connecting rod (5) to penetrate through and moving, and the middle part of the first channel (61) is provided with a step (62) driven by the second end (52) of the connecting rod (5) to drive the contact support (6) to rotate;

the lock catch (7) is rotatably arranged above the contact support (6), the lock catch (7) is provided with a first action position driven by the second end (52) of the connecting rod (5) to rotate and a second action position for driving the second end (52) to be separated from the step (62) under the action of external force, and a multi-stage linkage structure is arranged on the lock catch (7);

a holder elastic member (63) having one end connected to the housing (9) and the other end connected to the contact holder (6) and configured to apply a biasing force to the contact holder (6) toward a trip position;

a link elastic member (53) provided on the contact holder (6) for applying a biasing force to the second end (52) of the link (5) toward the opening position;

the combination structure comprises a driving block (64) arranged on the contact support (6) and a first matching block (73) arranged on the lock catch (7), wherein the first matching block (73) can be driven by the driving block (64) to rotate when the contact support (6) rotates towards the direction of the opening position.

2. The operating mechanism of a small size circuit breaker according to claim 1, wherein the multi-stage linkage structure comprises:

the first insertion hole (71) is formed in the front face of the lock catch (7) and can be in adaptive insertion with the assembling shaft;

and the second insertion hole (72) is formed in the back of the lock catch (7), and the second insertion hole (72) is a long hole into which another assembling shaft can be inserted.

3. The operating mechanism of a miniature circuit breaker according to claim 1 or 2, wherein a positioning structure adapted to allow the first mating block (73) and the driving block (64) to be mounted at a set mounting position is further provided between the contact holder (6) and the latch (7), and the positioning structure comprises a positioning hole (74) provided on the latch (7), and a protruding shaft (65) provided on the contact holder (6) and capable of plugging into the positioning hole (74).

4. The operating mechanism of a miniature circuit breaker according to claim 3 wherein said support spring (63) is a tension spring having one end hooked to said first mounting post (91) on said housing (9) and the other end hooked to said hanging hole (66) of said contact support (6).

5. The operating mechanism of small circuit breaker according to claim 4, wherein the link elastic member (53) is a torsion spring sleeved on the second mounting post (67) of the contact holder (6), the torsion spring has a torsion spring main body portion (54) mounted on the second mounting post (67), and an elastic arm (55) extending above the first channel (61) and capable of abutting against the second end (52) of the link (5).

6. The operating mechanism of small-sized circuit breaker according to claim 5, wherein the lower end of the latch (7) is provided with a second engaging block (75) which can be arranged opposite to the push rod (8) of the electromagnetic trip mechanism, and the second engaging block (75) is formed with a through hole for the bimetallic pull rod to pass through.