CN114093729A - Tripping mechanism suitable for circuit breaker - Google Patents

Abstract

The invention relates to a tripping mechanism suitable for a circuit breaker, which comprises a lock catch and a jump buckle matched with the lock catch, wherein when a circuit is in a normal state, the lock catch and the jump buckle are effectively connected to form a limiting structure; when the circuit is in an abnormal state, the lock catch is driven by an execution component in the circuit breaker to be disconnected with the jump buckle so as to execute unhooking action; the lock catch and the jump buckle comprise corresponding contact surfaces, tooth parts are arranged on the two contact surfaces, and the lock catch and the jump buckle are limited by the mutual meshing of the two tooth parts; the lock catch and the jump buckle pass through the guide post and the guide hole, the relative position of the lock catch and the jump buckle is positioned, so that the two tooth parts are meshed with a fixed posture, the guide post and the guide hole are arranged on the contact surface, the guide post and the guide hole penetrate through the tooth parts, and accidental unhooking of the lock catch and the jump buckle caused by incomplete meshing is avoided.

Description

Tripping mechanism suitable for circuit breaker

Technical Field

The invention relates to the field of circuit breakers, in particular to a tripping mechanism suitable for a circuit breaker.

Background

In the field of circuit breakers, a circuit breaker refers to a switching device capable of closing, bearing and opening current under normal loop conditions and closing, bearing and opening current under abnormal loop conditions within a specified time, an intelligent miniature circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a tripping mechanism, a shell and the like, wherein the tripping mechanism is used as an important component in the circuit breaker, the response speed and the effect accuracy of the tripping mechanism are very important for the circuit breaker, the existing tripping mechanism at least comprises two connected lock catches and a trip catch, and the existing design mode that the lock catch and the trip catch need to be switched between connection and disconnection is that the lock catch and the trip catch are arranged to be in a balanced state, but the stability of the balanced state of the connection of the lock catch and the trip catch is poor, and the balanced state of the lock catch and the trip catch is rapidly broken in a violent movement process, resulting in accidental unhooking.

Disclosure of Invention

Aiming at the defects in the prior art, the invention mainly aims to provide a tripping mechanism suitable for a circuit breaker, which comprises a lock catch and a jump buckle matched with the lock catch, wherein when a circuit is in a normal state, the lock catch and the jump buckle are effectively connected to form a limiting structure; when the circuit is in an abnormal state, the lock catch is driven by an execution component in the circuit breaker to be disconnected with the jump buckle so as to execute unhooking action;

the lock catch and the jump buckle comprise corresponding contact surfaces, tooth parts are arranged on the two contact surfaces, and the lock catch and the jump buckle are limited by the mutual meshing of the two tooth parts;

the lock catch and the jump buckle pass through the guide post and the guide hole, the relative position of the lock catch and the jump buckle is positioned, so that the two tooth parts are meshed with each other in a fixed posture, and the guide post and the guide hole are arranged on the contact surface, so that the guide post and the guide hole penetrate through the tooth parts.

Preferably, the tooth numbers of the tooth parts are consistent, and the fixed postures of the tooth parts are that the teeth on the two tooth parts are correspondingly meshed so that the guide posts are aligned with the guide holes.

Preferably, the guide post is arranged on the jump buckle, and the guide hole is formed in the lock buckle;

the lock catch and the jump buckle are correspondingly provided with a guide hole and a mounting hole on the end face provided with the tooth part, the guide column is arranged in the mounting hole, one end of the guide column extends out of the tooth part, and therefore when the lock catch and the jump buckle are effectively connected, the guide column extends into the guide hole.

Preferably, when the lock catch is operatively connected to the jump catch, the guide post extends into the guide hole prior to engagement of the two teeth.

Preferably, an elastic part is arranged between the guide post and a base surface of the mounting opening, and when the guide post is acted by external force, the elastic part is elastically deformed so that the guide post is retracted into the mounting opening.

Preferably, the guide hole penetrates from one side end face of the lock catch provided with the tooth part to the corresponding other side;

the circuit breaker is characterized in that a push rod is arranged in the guide hole, the push rod is installed on a fixed base surface of the circuit breaker, the push rod pushes against the guide post, and when the lock catch performs unhooking action, the lock catch moves relative to the push rod, so that the push rod pushes the guide post out of the guide hole.

Preferably, the diameter of the ejector pin is smaller than the guide hole.

Preferably, the guide post is provided with a convex abutting convex surface on one end surface abutting against the ejector rod, the abutting end surface of the ejector rod corresponding to the ejector rod is inwards sunken, and when the lock catch is effectively connected with the jump buckle, part of the abutting convex surface extends into the abutting end surface.

Preferably, the jump buckle comprises a buckle foot, and the buckle is stepped to at least comprise a limit step, so that one end of the buckle foot is lapped on the raised step surface of the limit step.

Preferably, the latch further includes a first pivot portion pivotally connected to a base surface of the circuit breaker and a pushing portion disposed at one end of the latch, the first pivot portion is disposed at the other end away from the pushing portion, and the actuating member acts on the pushing portion to rotate the latch, so that the latch disengages from the tooth portion on the jumper and causes the latch leg to disengage from the limit step.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a tripping mechanism suitable for a circuit breaker, which is characterized in that the relative positions of a lock catch and a jump buckle are positioned by guiding through a guide post and a guide hole, so that two tooth parts on the lock catch and the jump buckle are completely meshed, and the accidental unhooking phenomenon of the lock catch and the jump buckle caused by incomplete meshing in the shaking process of the circuit breaker is avoided.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic perspective view of a unhooking mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a latch according to an embodiment of the present invention;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

fig. 4 is a schematic perspective view of a jump buckle according to an embodiment of the present invention;

FIG. 5 is an enlarged partial schematic view of FIG. 4;

FIG. 6 is a partial cross-sectional view of a unhooking mechanism in one embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of FIG. 6;

fig. 8 is a schematic perspective view of a lift pin according to an embodiment of the present invention.

Description of reference numerals:

11. locking; 111. a limiting step; 112. a first pivot part; 113. a locking surface; 114. a first tooth portion; 115. a guide hole; 116. a pushing end;

12. jumping and buckling; 121. a fastening pin; 1211. a limiting surface;

122. a second pivot part; 123. an installation port; 124. meshing the tooth parts;

125. a guide post; 1251. abutting against the convex surface;

126. an elastic portion; 127. mounting blocks;

13. a top rod; 131. an abutting end face; 132. and a fixed end.

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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar language throughout the specification is not intended to imply any order, quantity, or importance, but rather the intention is to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.

Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

According to an embodiment of the present invention, as can be seen in fig. 1 to 8, a tripping mechanism for a circuit breaker includes a latch 11 and a jump buckle 12 adapted to the latch 12, wherein when a circuit is in a normal state, the latch 11 is effectively connected to the jump buckle 12 to form a limiting structure; when the circuit is in an abnormal state, the lock catch 11 is driven by an execution component in the circuit breaker to be disconnected with the jump catch 12 so as to execute unhooking action;

the lock catch 11 and the jump buckle 12 comprise corresponding contact surfaces, tooth parts are arranged on the two contact surfaces, and the lock catch 11 and the jump buckle 12 are limited by the mutual meshing of the two tooth parts; the mutual engagement between the tooth parts ensures that the circuit breaker shakes violently, and the lock catch 11 and the jump catch 12 can still be stably connected together.

On the other hand, the lock catch 11 and the jump buckle 12 pass through the guide post 125 and the guide hole 115, the relative positions of the lock catch 11 and the jump buckle 12 are positioned so that the two tooth parts are engaged with each other in a fixed posture, and the guide post 125 and the guide hole 115 are arranged on the contact surface so that the guide post 125 and the guide hole 115 pass through the tooth parts; specifically, the lock catch 11 has the same number of teeth, and the fixed posture of the tooth portions is that the teeth on the two tooth portions are correspondingly engaged so that the guide post 125 is aligned with the guide hole 115, and when the tooth portions are partially engaged, the connection stability is still low due to the small contact area, and when the teeth on the two tooth portions are completely engaged, the connection stability of the tooth portions is the highest, but during normal use, the engagement positions of the tooth portions on the lock catch 11 and the jump buckle 12 are difficult to control, so that the two tooth portions cannot be determined to be in the fixed posture of complete engagement.

The surface of the lock catch 11 corresponding to the jump buckle 12 is a locking surface 113, the locking surface 113 is provided with a first tooth part 114, the jump buckle 12 is provided with an engaging tooth part 124 corresponding to the first tooth part 114, and the lock catch 11 and the jump buckle 12 form effective connection through the engagement between the first tooth part 114 and the engaging tooth part 124; in addition, while the effective connection is formed, the guide post 125 extends into the guide hole 115, so that the guide post 125 and the guide hole 115 are utilized to limit the position relationship between the lock catch 11 and the jump buckle 12, and the teeth of the first tooth part 114 and the meshing tooth part 124 are in a completely meshed fixed posture, so that the lock catch 11 and the jump buckle 12 form a stable limit structure, and the problem of loosening caused by violent shaking is solved.

In the scheme, the guide post 125 is installed on the jump buckle 12, and the guide hole 115 is formed on the lock buckle 11; the lock catch 11 and the jump buckle 12 are correspondingly provided with a guide hole 115 and a mounting hole 123 on the end surfaces provided with the tooth parts, the guide column 125 is arranged in the mounting hole 123 and one end of the guide column 125 extends out of the tooth parts, so that when the lock catch 11 is effectively connected with the jump buckle 12, the guide column 125 extends into the guide hole 115.

In one embodiment, when the latch 11 is operatively connected to the jumper 12, the guide post 125 extends into the guide hole 115 to engage with two teeth before positioning the latch 11 and the jumper 12, so that the positional relationship between the latch 11 and the jumper 12 is guided by the guide post 125 and the guide hole 115, and after the positional relationship between the latch 11 and the jumper 12 is determined, further approach between the latch 11 and the jumper 12 can determine that the first tooth 114 and the tooth of the engaging tooth 124 are in a completely engaged fixed posture, so as to ensure the reliability of the interconnection of the tripping mechanism, and when the tripping is performed, under the driving of the actuating part in the circuit breaker, the first tooth 114 and the engaging tooth 124 are disengaged first, so that the guide post 125 is disengaged from the guide hole 115 to complete a tripping operation. It can be seen that this, where the unhooking action is divided into two steps and there is a sequential order, results in a long completion time of the unhooking action, i.e. a long response time of the unhooking, which also easily leads to irreversible damage of the circuit for a period of time before the completion of the unhooking.

Therefore, in order to increase the response speed of unhooking, in a preferred embodiment, an elastic portion 126 is disposed between the guide post 125 and a base surface of the mounting opening 123, and when the guide post 125 is subjected to an external force, the elastic portion 126 is elastically deformed so that the guide post 125 is retracted into the mounting opening 123, so as to facilitate the guide post 125 to be pulled out from the guide hole 115.

Further, the guide hole 115 penetrates from one side end surface of the lock catch 11 provided with the tooth part to the corresponding other side; the ejector rod 13 is arranged in the guide hole 115, the ejector rod 13 is installed on a fixed base surface of the circuit breaker, the ejector rod 13 abuts against the guide post 125, and when the lock catch 11 performs unhooking action, the lock catch 11 moves relative to the ejector rod 13, so that the ejector rod 13 pushes the guide post 125 out of the guide hole 115; wherein, because the push rod 13 is installed on a fixed base surface of the circuit breaker, the position of the push rod 13 is kept unchanged, when the latch 11 performs unhooking action, the latch 11 is relatively far away from the jump buckle 12, and because the push rod 13 is kept still, the push rod 13 is relatively close to the jump buckle 12, when the jump buckle 12 approaches, the push rod 13 pushes the guide post 125 so as to enable the guide post 125 to be rapidly removed from the guide hole 115, in the process, the disengagement between the teeth is performed simultaneously with the push rod 13 pushing the guide post 125, thereby enabling the response speed of the whole unhooking.

In a specific aspect of the preferred embodiment, the buckle 12 includes a buckle leg 121, and the buckle 11 is stepped to include at least one limiting step 111 thereon, such that one end of the buckle leg 121 overlaps the raised step surface of the limiting step 111.

The latch 11 further includes a first pivot 1112 for pivoting on a base surface of the circuit breaker and a pushing portion 116 disposed at one end of the latch 11, the first pivot 1112 is disposed at the other end away from the pushing portion 116, and the actuating member acts on the pushing portion 116 to rotate the latch 11, so that the latch 11 disengages from the teeth of the jumper 12 and causes the latch 121 to disengage from the limit step 111, specifically, the latch 121 includes a side surface serving as a limit surface 1211, and when the latch 121 overlaps the limit step 111, the limit surface 1211 is attached to a protruding step surface of the limit step 111; meanwhile, the jumper 12 is L-shaped, the snap foot 121 serves as one side of the jumper 12, and the corner of the jumper 12 includes a second pivot portion 122, so that the jumper 12 is also pivoted on the breaker, and a mounting opening 123 is formed on the surface of the other side of the jumper 12 for connecting an elastic unit to ensure that the jumper 12 is reset by the traction force of the elastic unit.

Further, the diameter of the top bar 13 is smaller than the diameter of the guiding hole 115, so as to avoid the interference of the top bar 13 with the movement of the lock catch 11 during the rotation of the lock catch 11, therefore, the diameter of the top bar 13 is designed to be smaller than the diameter of the guiding hole 115, thereby giving way to the movement of the lock catch 11.

Be equipped with bellied conflict convex surface 1251 on the guide post 125 with the terminal surface of ejector pin 13 conflict, ejector pin 13 corresponds the conflict terminal surface 131 of ejector pin 13 and inwards caves in, ejector pin 13 is stiff end 132 for the other end of conflict terminal surface 131, stiff end 132 is connected and is used for fixing ejector pin 13 on the basal plane of circuit breaker, when hasp 11 with jump knot 12 effective connection, partial conflict convex surface 1251 stretches into to conflict terminal surface 131 in, contact area has been increased through conflict convex surface 1251 and conflict terminal surface 131 contact, thereby reduced and pushed up guide post 125 andor elastic component 126 deformation restoration effort at ejector pin 13 and to the pressure of ejector pin 13, thereby protection ejector pin 13 has increased the life of ejector pin 13.

While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

Claims (10)

1. The tripping mechanism suitable for the circuit breaker is characterized by comprising a lock catch (11) and a jump buckle (12) matched with the lock catch (12), wherein when a circuit is in a normal state, the lock catch (11) is effectively connected with the jump buckle (12) to form a limiting structure; when the circuit is in an abnormal state, the lock catch (11) is driven by an execution component in the circuit breaker to be disconnected with the jump buckle (12) so as to execute unhooking action;

the lock catch (11) and the jump buckle (12) comprise corresponding contact surfaces, tooth parts are arranged on the two contact surfaces, and the lock catch (11) and the jump buckle (12) are limited by the mutual meshing of the two tooth parts;

the lock catch (11) and the jump buckle (12) are positioned at the relative positions of the lock catch (11) and the jump buckle (12) through a guide post (125) and a guide hole (115) so that two tooth parts are meshed with each other in a fixed posture, and the guide post (125) and the guide hole (115) are arranged on a contact surface so that the guide post (125) and the guide hole (115) penetrate through the tooth parts.

2. The trip mechanism of claim 1, wherein the number of teeth of the teeth is the same, and the fixed attitude of the teeth is such that the teeth of both teeth correspondingly mesh to align the guide post (125) with the guide hole (115).

3. The trip mechanism of claim 2, wherein said guide post (125) is mounted on said jump buckle (12), said guide hole (115) being opened on said catch (11);

the end faces, provided with the tooth parts, of the lock catch (11) and the jump buckle (12) are correspondingly provided with a guide hole (115) and a mounting hole (123), the guide column (125) is arranged in the mounting hole (123), and one end of the guide column (125) extends out of the tooth part, so that when the lock catch (11) is effectively connected with the jump buckle (12), the guide column (125) extends into the guide hole (115).

4. The trip mechanism of claim 3, wherein said guide post (125) extends into said guide hole (115) prior to engagement of said teeth when said catch (11) is operatively connected to said jumper (12).

5. The trip mechanism of claim 3, wherein a resilient portion (126) is disposed between the guide post (125) and a base surface of the mounting opening (123), and when the guide post (125) is subjected to an external force, the resilient portion (126) is resiliently deformed to retract the guide post (125) into the mounting opening (123).

6. The trip mechanism according to claim 5, characterized in that the guide hole (115) penetrates from one side end surface of the lock catch (11) provided with the teeth to the corresponding other side;

be equipped with ejector pin (13) in guiding hole (115), ejector pin (13) are installed on a fixed basal plane of this circuit breaker, ejector pin (13) top contacts guide post (125), when hasp (11) carry out the unhook action, hasp (11) relative ejector pin (13) motion makes ejector pin (13) will guide post (125) release guiding hole (115).

7. The trip mechanism of claim 6, wherein the diameter of the push rod (13) is smaller than the guide hole (115).

8. The trip mechanism according to claim 7, wherein a protruding abutting convex surface (1251) is provided on an end surface of the guiding post (125) abutting against the ejector rod (13), the ejector rod (13) is recessed inward corresponding to the abutting end surface (131) of the ejector rod (13), and when the lock catch (11) is operatively connected to the trip buckle (12), a portion of the abutting convex surface (1251) extends into the abutting end surface (131).

9. Trip unit according to any of claims 1-8, wherein the jump button (12) comprises a button foot (121), and the button (11) is stepped so as to comprise at least one limit step (111) thereon, such that one end of the button foot (121) overlaps the raised step surface of the limit step (111).

10. The trip mechanism according to claim 9, wherein the latch (11) further comprises a first pivot portion (1112) pivotally connected to a base surface of the circuit breaker and a pushing portion (116) provided at one end of the latch (11), the first pivot portion (1112) is provided at the other end away from the pushing portion (116), and an actuating member acts on the pushing portion (116) to rotate the latch (11) so that the latch (11) is engaged with the tooth portion of the jumper (12) and the latch leg (121) is disengaged from the limit step (111).

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