CN212485247U

CN212485247U - Operating mechanism of miniature circuit breaker

Info

Publication number: CN212485247U
Application number: CN202021651158.2U
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, include: the locking device comprises a shell, a locking mechanism and a locking mechanism, wherein two supporting blocks which are oppositely arranged are arranged on the shell, an installation cavity is oppositely formed by the two supporting blocks, an upper opening and a lower opening which are communicated with the installation cavity and can limit the installation position of a lock catch, and a slot into which a metal shaft can be inserted is formed in the middle of the installation cavity; the lock catch is rotatably arranged between the contact support and the shell and is provided with a rotating part which is rotatably arranged in the mounting cavity, a first rotating arm and a second rotating arm which respectively extend out of the upper opening and the lower opening, and a first through hole for the metal shaft to penetrate through is formed in the middle of the lock catch; and the contact support is rotatably arranged on the supporting block through a metal shaft. The upper shed and the under shed of supporting shoe can inject the rotational position of first rotor arm and second rotor arm respectively to avoid the hasp to rotate excessively, improved the reliability, and the initial assembly position of hasp can be confirmed fast to installer with the under shed, improved assembly efficiency.

Description

Operating mechanism of miniature circuit breaker

Technical Field

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

Background

The miniature circuit breaker generally comprises an electromagnetic tripping system, a thermal tripping system, an arc extinguishing system, an operating mechanism and the like, wherein the operating mechanism is a component for opening and closing the circuit breaker, the operating mechanism ensures that the circuit breaker is reliably closed and is quickly 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 has the defects of more parts, low assembly efficiency and high production cost due to manual assembly.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that operating device spare part quantity is more, assembly efficiency is low and manufacturing cost is high among the prior art to a simple structure, the assembly is swiftly convenient, low in production cost's operating device of miniature circuit breaker is provided.

Therefore, the utility model provides an operating mechanism of miniature circuit breaker, including casing, hasp, contact carrier, be equipped with two relative supporting shoes that set up on the casing, two said supporting shoe relatively form the installation cavity, and with the connection of installation cavity, can limit the upper opening and the lower opening of hasp mounted position, the middle part of installation cavity is equipped with the slot that can supply the metal shaft to insert; the lock catch is rotatably arranged between the contact support and the shell and is provided with a rotating part which is rotatably arranged in the mounting cavity, a first rotating arm and a second rotating arm which respectively extend out of the upper opening and the lower opening, a gap is formed between the rotating part and the supporting block, and a first through hole for the metal shaft to penetrate through is formed in the middle of the rotating part and the supporting block; and the contact support is rotatably arranged on the supporting block through the metal shaft.

The contact device also 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 the shell; a link having a first end connectable to the handle and a second end connectable to a contact carrier; the lower end of the contact support is provided with a moving contact, the upper end of the contact support is provided with a first channel which allows the second end of the connecting rod to penetrate through and is used for the connecting rod to move, and the middle part of the first channel is provided with a step which is driven by the second end to drive the contact support to rotate; the lock catch is provided with a first action position and a second action position, wherein the first rotating arm of the lock catch is driven to rotate by the second end of the connecting rod, and the second action position drives the second end to be separated from the step under the action of external force; 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 a trip position; and the connecting rod elastic piece is arranged on the contact support and is used for applying a biasing force to the second end of the connecting rod to move towards the opening position.

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 part is located for the cover torsional spring on the second erection column of contact support, the torsional spring have install in torsional spring main part on the second erection column, and extend to first passageway top, can with the couple portion that the hook is connected is held to the connecting rod second.

The end part of the second rotating arm is provided with a matching surface which can be driven by a push rod of the electromagnetic tripping mechanism to rotate.

And a second through hole for the double-gold pull rod to penetrate through is formed in the end part of the second rotating arm.

And a plurality of reinforcing ribs are arranged at the joint of the supporting block and the shell.

The utility model discloses technical scheme has following advantage:

1. the utility model provides an operating mechanism of a miniature circuit breaker, a lock catch is provided with a rotating part which is rotatably arranged in an installation cavity, and a first rotating arm and a second rotating arm respectively extending from the upper opening and the lower opening, a gap is provided between the rotating part and the supporting block, the contact holder is rotatably mounted on the supporting block, the upper opening and the lower opening of the supporting block can respectively limit the rotating positions of the first rotating arm and the second rotating arm, thereby avoiding excessive rotation of the lock catch, improving reliability, facilitating an installer to quickly determine the initial assembly position of the lock catch by the upper opening and the lower opening, improving assembly efficiency, and in addition, because the gap is arranged between the rotating part and the supporting block, the rotating part and the supporting block which are both made of plastic are prevented from being locked due to expansion with heat and contraction with cold, the reliability of the operating mechanism is further improved, and the service life is prolonged.

2. The utility model provides an operating device of miniature circuit breaker, the supporting shoe is equipped with many strengthening ribs with the junction of casing to increased the structural strength of casing, life is longer.

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 diagram of a miniature circuit breaker according to the present invention;

FIG. 2 is a schematic structural view of the contact carrier and the link spring of FIG. 1 with the contact carrier and link spring removed;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a schematic structural view of the housing;

FIG. 5 is a front view of the operating mechanism;

FIG. 6 is a rear view of the operating mechanism;

fig. 7 is an exploded view of the contact carrier, latch, and link spring.

Description of reference numerals: 1. a housing; 11. a metal shaft; 12. a first mounting post; 13. reinforcing ribs; 2. a support block; 21. a mounting cavity; 22. an upper opening; 23. a lower opening; 3. locking; 30. a rotating part; 31. a first rotation arm; 32. a second rotating arm; 33. a mating surface; 34. a second perforation; 4. a contact holder; 40. a moving contact; 41. a first channel; 42. a step; 43. a bracket elastic member; 44. a link elastic member; 441. a torsion spring main body portion; 442. a hook portion; 45. hanging holes; 46. a second mounting post; 5. a handle; 6. a connecting rod; 61. a first end; 62. a second end; 7. a bimetallic pull rod.

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 to 7, including a housing 1, a handle 5, a link 6, a contact holder 4, a latch 3, a holder elastic member 43, and a link elastic member 44.

As shown in fig. 2-4, the housing 1 is provided with two opposite supporting blocks 2, the two supporting blocks 2 are opposite to each other to form an installation cavity 21, and an upper opening 22 and a lower opening 23 which are communicated with the installation cavity 21 and can define the installation position of the lock catch 3, a slot into which the metal shaft 11 can be inserted is provided in the middle of the installation cavity 21, and a plurality of reinforcing ribs 13 are provided at the connection positions of the supporting blocks 2 and the housing 1.

And a handle 5 rotatably mounted on the housing 1.

A link 6 having a first end 61 connectable to said handle 5 and a second end 62 connectable to the contact carrier 4. In this embodiment, the link 6 is a U-shaped rod.

The contact support 4 is rotatably mounted on the support block 2 through the metal shaft 11, as shown in fig. 1, 5, 6 and 7, a movable contact 40 is disposed at a lower end thereof, a first channel 41 allowing the second end 62 of the connecting rod 6 to penetrate therethrough and allowing the connecting rod to move is formed at an upper end thereof, and a step 42 driven by the second end 62 to drive the contact support 4 to rotate is disposed at a middle portion of the first channel 41.

The lock catch 3 is rotatably installed between the contact support 4 and the housing 1, the lock catch 3 has a rotating portion 30 rotatably installed in the installation cavity 21, and a first rotating arm 31 and a second rotating arm 32 respectively extending from the upper opening 22 and the lower opening 23, a gap is provided between the rotating portion 30 and the supporting block 2, a first through hole for the metal shaft 11 to penetrate through is provided in the middle of the rotating portion, a matching surface 33 capable of being driven by a push rod of an electromagnetic trip mechanism to rotate is provided at the end of the second rotating arm 32, and a second through hole 34 for the bimetallic pull rod 7 to penetrate through is provided. The latch 3 has a first actuating position in which the first pivot arm 31 is pivoted by the second end 62 of the link 6, and a second actuating position in which the second end 62 is moved away from the step 42 by an external force.

Support elastic component 43, one end with casing 1 is connected, the other end with contact carrier 4 connects, be used for to contact carrier 4 applies the biasing force towards the movement of separating brake position, in this embodiment, support elastic component 43 is the extension spring, the one end of extension spring with first erection column 12 hook on the casing 1 is connected, the other end with contact carrier 4's hanging hole 45 hook is connected.

The link elastic member 44 is disposed on the contact support 4, and is configured to apply a biasing force to the second end 62 of the link 6 toward the opening position, in this embodiment, the link elastic member 44 is a torsion spring sleeved on the second mounting column 46 of the contact support 4, and the torsion spring has a torsion spring main body portion 441 mounted on the second mounting column 46, and a hook portion 442 extending above the first channel 41 and capable of being hooked and connected to the second end 62 of the link 6.

The utility model provides an operating device of miniature circuit breaker, hasp 3 has the rotation portion 30 of rotationally installing in installation cavity 21, and respectively from upper shed 22 and the first rotor arm 31 and the second rotor arm 32 that lower opening 23 stretches out, be equipped with the clearance between rotation portion 30 and the supporting shoe 2, contact holder 4 rotationally installs on supporting shoe 2, the upper shed 22 and the lower opening 23 of supporting shoe 2 can prescribe a limit to the rotational position of first rotor arm 31 and second rotor arm 32 respectively, thereby avoid hasp 3 to rotate excessively, reliability is improved, and upper shed 22 and lower opening 23 can make things convenient for installer to confirm the initial assembly position of hasp fast, assembly efficiency has been improved, in addition, because be equipped with the clearance between rotation portion 30 and the supporting shoe 2, avoid rotating portion 30 and supporting shoe 2 that are made for plastics simultaneously to cause both locks because of expend with heat and contract with cold, the reliability of the operating mechanism is further improved, and the service life is prolonged.

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

when closing the switch:

the handle 5 rotates clockwise, the second end 62 of the connecting rod 6 abuts against the step 42 of the contact support 4, the contact support 4 is driven to rotate clockwise around the metal shaft 11 until the moving contact 40 arranged on the contact support 4 is in contact communication with the static contact, at the moment, the support elastic part 43 accumulates energy, the connecting rod 6 abuts against the top of the lock catch 3 in the moving process, and the lock catch 3 is driven to rotate clockwise around the metal shaft 11.

When the brake is opened:

the lock catch 3 rotates anticlockwise to a tripping position under the driving of the bimetallic pull rod 7 or the push rod of the electromagnetic tripping mechanism, so that the second end 62 of the connecting rod 6 is separated from the step 42 on the contact support 4, after the contact support 4 loses the pushing force of the connecting rod 6, the support elastic piece 43 releases energy to drive the contact support 4 to rotate anticlockwise, and the connecting rod 6 returns to a tripping position under the action of the connecting rod elastic piece 44.

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:

the locking device comprises a shell (1), two opposite supporting blocks (2) are arranged on the shell, an installation cavity (21) is formed by the two supporting blocks (2) oppositely, an upper opening (22) and a lower opening (23) are communicated with the installation cavity (21) and can limit the installation position of a lock catch (3), and a slot for inserting a metal shaft (11) is formed in the middle of the installation cavity (21);

the lock catch (3) is rotatably arranged between the contact support (4) and the shell (1), the lock catch (3) is provided with a rotating part (30) which is rotatably arranged in the installation cavity (21), and a first rotating arm (31) and a second rotating arm (32) which respectively extend out of the upper opening (22) and the lower opening (23), a gap is formed between the rotating part (30) and the supporting block (2), and a first through hole for the metal shaft (11) to penetrate through is formed in the middle of the rotating part;

and the contact support (4) is rotatably arranged on the supporting block (2) through the metal shaft (11).

2. The operating mechanism of a small size circuit breaker according to claim 1, further comprising:

a handle (5) rotatably mounted on the housing (1);

a connecting rod (6) having a first end (61) connectable to the handle (5) and a second end (62) connectable to the contact carrier (4);

the lower end of the contact support (4) is provided with a movable contact (40), the upper end of the contact support is provided with a first channel (41) which allows the second end (62) of the connecting rod (6) to penetrate through and move, and the middle part of the first channel (41) is provided with a step (42) which is driven by the second end (62) to drive the contact support (4) to rotate;

the lock catch (3) is provided with a first action position and a second action position, wherein the first rotation arm (31) of the lock catch is driven to rotate by the second end (62) of the connecting rod (6), and the second action position drives the second end (62) to be separated from the step (42) under the action of external force;

a holder elastic member (43) having one end connected to the housing (1) and the other end connected to the contact holder (4) and configured to apply a biasing force to the contact holder (4) toward a trip position;

and the connecting rod elastic piece (44) is arranged on the contact support (4) and is used for applying a biasing force to the second end (62) of the connecting rod (6) to move towards the opening position.

3. The operating mechanism of a miniature circuit breaker according to claim 2 wherein said support spring (43) is a tension spring having one end hooked to said first mounting post (12) on said housing (1) and the other end hooked to said hanging hole (45) of said contact support (4).

4. The operating mechanism of a miniature circuit breaker according to claim 2 or 3 wherein said link elastic member (44) is a torsion spring fitted over said second mounting post (46) of said contact carrier (4), said torsion spring having a torsion spring main body portion (441) mounted on said second mounting post (46), and a hook portion (442) extending above said first channel (41) and being capable of hooking with said second end (62) of said link (6).

5. The operating mechanism of a small size circuit breaker according to claim 4 wherein the end of the second rotating arm (32) is provided with a mating surface (33) which can be driven to rotate by the push rod of the electromagnetic trip mechanism.

6. The operating mechanism of a small size circuit breaker according to claim 5, wherein the end of the second rotating arm (32) is provided with a second through hole (34) for the bimetal pull rod (7) to pass through.

7. The operating mechanism of a small size circuit breaker according to claim 1, wherein a plurality of ribs (13) are provided at the junction of the supporting block (2) and the housing (1).