CN215451317U - Supporting structure of thermomagnetic release of molded case circuit breaker - Google Patents

Abstract

The utility model discloses a supporting structure of a thermomagnetic release of a molded case circuit breaker, which comprises a supporting piece arranged in an accommodating cavity of a base, wherein the top of the supporting piece is connected with a thermal element, the supporting piece is positioned and arranged in the base through a positioning structure, the positioning structure comprises two positioning bosses which are oppositely arranged at the bottom of the supporting piece and two positioning grooves which are correspondingly arranged in the base and are matched and spliced with the two positioning bosses, and a fastening structure for tightly installing the supporting piece and the thermal element in the base is arranged between the supporting piece and the thermal element in a penetrating way. The supporting piece is simple in structural design, convenient to install, good in installation stability, high in installation adaptability and low in cost, plays a supporting and positioning effect on the base for the thermomagnetic release, effectively increases the installation height of the thermomagnetic release on the base through the supporting piece, enables the thermomagnetic release to meet the installation requirement after the base is heightened, and improves the service performance of a product.

Description

Supporting structure of thermomagnetic release of molded case circuit breaker

Technical Field

The utility model relates to the technical field of low-voltage electric appliances, in particular to a supporting structure of a thermomagnetic release of a molded case circuit breaker.

Background

A molded case circuit breaker is a switching device capable of closing, carrying, and opening a current under a normal circuit condition, and closing, carrying, and opening a current under an abnormal circuit condition (including a short-circuit condition) within a prescribed time. The molded case circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur.

The plastic shell circuit breaker is an important protection device in a low-voltage distribution system, and plays a role in connecting and breaking normal working current in the low-voltage distribution system, therefore, an electronic or thermomagnetic tripping system is arranged in the plastic shell circuit breaker, so that the plastic shell circuit breaker has the functions of providing short-circuit protection, overload protection, undervoltage protection and the like for alternating-current power grid lines and electric equipment. The thermomagnetic release is applied to a molded case circuit breaker as a common application and comprises a bimetallic strip, a heating element, a static armature, a movable armature and a traction rod, wherein the thermal element, the bimetallic strip and the conductive plate are formed by multiple electric welding processing and chain splicing, and are fixed on a base through a plurality of screw structures, and the release is connected with the movable contact through flexible connection. However, in order to mount an electronic release or a thermal electromagnetic release, some molded case circuit breakers in the market generally have a higher product base, so that the mounting depth of the release in the base is increased, and thus the release cannot be matched with a trip bar of the circuit breaker, or the lengths of a thermal element and bimetallic strip are increased, so that the cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides the supporting structure of the thermomagnetic release of the molded case circuit breaker, which has the advantages of simple structure, stable and reliable installation, increased installation height of the release in the base and reduced cost.

In order to achieve the above object, the present invention provides a supporting structure of a thermo-magnetic type release of a molded case circuit breaker, comprising: the support piece is installed in the holding intracavity of base erectly to form, the support piece top is connected with the hot component, support piece passes through the location structure location and installs in the base, the location structure including set up relatively in two location bosss of support piece bottom and correspond set up in the base and with two positioning groove that the boss cooperation was pegged graft, wear to be equipped with between support piece and the hot component and install the two fastening structure in the base.

As a preferable scheme, the positioning structure further includes: the shaping is in support piece bottom and the installation notch that is located between two location bosss and correspond the installation arch of shaping between two positioning groove, the card of installation notch looks adaptation is supported on the installation arch.

As a preferred scheme, the thermomagnetic release comprises an iron core support connected to the thermal element and an armature component rotatably arranged on the iron core support, the support piece is in a square shape, and a multi-layer step surface structure is arranged on two sides of the top of the support piece corresponding to the iron core support and the armature component.

As a preferred scheme, the step face structure includes highly in proper order progressively increase first face of stepping down, the second face of stepping down and the top plane, the bottom of armature portion and iron core support extends to respectively first face of stepping down and the second face department of stepping down, the one end of heating element bend the butt in on support piece's the top plane.

As a preferred scheme, two guiding bevel edges are arranged on two sides of the bottom of each positioning boss, and interference protrusions are arranged on the side faces, back to the mounting groove openings, of the two positioning bosses respectively.

As a preferred scheme, a plurality of groups of reinforcing rib structures extending and connecting the two positioning bosses are symmetrically arranged on the side walls of the two sides of the supporting piece.

Preferably, the fastening structure includes a through hole penetrating the upper and lower ends of the support member, a screw hole provided at one end of the thermal element and corresponding to the through hole, and a bolt member fastened to the screw hole by passing through the through hole from the bottom of the base upward.

As a preferred scheme, a cavity structure and a guide hole column penetrating through the through hole are arranged in the supporting piece, the top end of the cavity structure is a closed end, the bottom end of the cavity structure is an open end extending to the bottom of the supporting piece, and a plurality of supporting convex ribs connected to the side wall of the guide hole column are arranged in the cavity structure around the guide hole column.

As a preferred scheme, the via post and the through hole are arranged at the central position of the support member, and tapered arc surfaces are respectively formed at two ends of the through hole.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. in the supporting structure of the thermomagnetic release of the molded case circuit breaker provided by the utility model, the supporting piece plays a role in mounting and supporting the thermal element on the base and simultaneously increases the mounting height of the thermal element in the base, when the supporting structure is mounted, two positioning bosses at the bottom of the supporting piece are inserted into two positioning grooves of the base, so that the supporting piece plays a role in pre-positioning and mounting, so as to avoid the situation that the supporting piece is shifted and shaken in the mounting process, then, the fastening structure penetrates through the supporting piece and the thermal element and fixes the supporting piece and the thermal element on the base, so that the thermomagnetic release is fastened and connected with the supporting piece through the thermal element, by adopting the technical scheme, the supporting piece has simple structural design and convenient mounting, plays a role in supporting and positioning the thermomagnetic release on the base, has good mounting stability, and effectively increases the mounting height of the thermomagnetic release on the base through the supporting piece, therefore, under the condition that the lengths of the thermal element and the bimetallic strip are not changed, the thermomagnetic release can meet the installation requirement after the base is heightened, the installation adaptability is high, the cost is reduced, and the service performance of the product is improved.

2. According to the supporting structure of the thermomagnetic release of the molded case circuit breaker, provided by the utility model, when the supporting piece is inserted into the two positioning grooves of the base through the two positioning bosses, the mounting notch arranged between the two positioning bosses is correspondingly clamped and abutted on the mounting protrusion of the base, and by the structural arrangement, the stability of positioning and mounting of the supporting piece on the base is ensured through the double positioning matching of the positioning bosses and the positioning grooves, and the mounting notch and the mounting bosses, so that the quick mounting of the supporting piece is favorably realized, and the mounting is stable and reliable.

3. According to the thermomagnetic measurement switch device, the two sides of the top of the supporting piece are provided with the multilayer step surface structures corresponding to the iron core support and the armature component, each step surface structure comprises the first abdicating surface, the second abdicating surface and the top end plane, the heights of the first abdicating surface, the second abdicating surface and the top end plane are sequentially increased, the structure is arranged, the top end plane provides the position required by installation for the thermal element, the installation position is flat, the supporting piece and the thermal element are connected together in the vertical direction, the installation height is increased, and the first abdicating surface and the second abdicating surface are designed to respectively reserve space for installation abdicating of the armature part and the iron core support, so that normal installation of the armature part and the iron core support on the thermal element is not interfered, the design is reasonable, and the matching is reliable.

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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a supporting structure of a thermo-magnetic release of a molded case circuit breaker according to the present invention;

FIG. 2 is a schematic perspective view of the support member of the present invention;

FIG. 3 is a structural view of the bottom direction of the supporting member according to the present invention;

FIG. 4 is a partially enlarged schematic view of the base of the present invention, particularly illustrating the positioning groove; description of reference numerals: 1. a base; 11. a positioning groove; 12. mounting a boss; 2. a support member; 21. positioning the boss; 22. installing a notch; 23. a hypotenuse guide; 24. interference protrusions; 25. a reinforcing rib structure; 26. a via post; 27. supporting the convex ribs; 3. a step surface structure; 31. a first abdicating surface; 32. a second abdicating surface; 33. a top end plane; 4. a fastening structure; 41. a through hole; 42. a conical arc surface; 5. a thermal element; 6. an iron core support; 7. an armature member.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The present embodiment provides a supporting structure of a molded case circuit breaker thermal-magnetic release as shown in fig. 1 to 4, including: be the support piece 2 of erectting the form and installing in the holding intracavity of base 1, 2 tops of support piece are connected with hot component 5, support piece 2 is installed through location structure location in the base 1, location structure including set up relatively in two location bosss 21 of 2 bottoms of support piece, with correspond set up in the base 1 and with two positioning groove 11 of two location bosss 21 cooperation pegs graft, wear to be equipped with between support piece 2 and the hot component 5 with the two fastening installation in fastening structure 4 in the base 1.

In the above embodiment, the support 2 is used for supporting and mounting the thermal element 5 on the base 1, and simultaneously increasing the mounting height of the thermal element 5 in the base 1, when mounting, the two positioning bosses 21 at the bottom of the support 2 are inserted into the two positioning grooves 11 of the base 1, so as to perform the pre-positioning mounting function on the support 2, so as to avoid the situation of position deviation and shaking of the support 2 during the mounting process, and then the fastening structure 4 passes through the support 2 and the thermal element 5 and fixes the two on the base 1, so that the thermomagnetic release is fastened and connected with the support 2 through the thermal element 5, by adopting the technical scheme, the support 2 has a simple structural design and good mounting stability, and has the supporting and positioning effects on the base 1 for the thermomagnetic release, and the mounting height of the thermomagnetic release on the base 1 is effectively increased through the support 2, therefore, under the condition that the lengths of the thermal element 5 and the bimetallic strip are not changed, the thermomagnetic release can meet the installation requirement after the base 1 is heightened, the installation adaptability is high, the cost is reduced, and the service performance of the product is improved.

As a preferred embodiment, the positioning structure further comprises: the mounting groove 22 is formed at the bottom of the support member 2 and located between the two positioning bosses 21, and the mounting protrusion 12 is correspondingly formed between the two positioning grooves 11, and the mounting groove 22 is in fit with the mounting protrusion 12 in a clamping manner. The structural arrangement ensures the stability of the positioning and installation of the support piece 2 on the base 1 through the double positioning matching of the positioning boss 21, the positioning groove 11 and the installation notch 22 and the installation boss, is favorable for realizing the quick installation of the support piece 2, and is stable and reliable in installation.

In this embodiment, referring to fig. 1, the thermomagnetic trip includes the iron core support 6 of connecting on the thermal element 5, and rotates the armature part that sets up on iron core support 6 to and set up quiet iron core and bimetallic element (a represents the thermomagnetic trip) on the side of thermal element 5 both sides, support piece 2 is the square form, and its top both sides correspond iron core support 6 and armature part and are provided with multilayer step face structure 3, wherein, step face structure 3 includes highly ascending first face of stepping down 31, second face of stepping down 32 and top plane 33 in proper order, the bottom of armature part and iron core support 6 extends to respectively first face of stepping down 31 and second face of stepping down 32 department, the one end butt of thermal element 5 in support piece 2 bends on top plane 33. According to the structural arrangement, the position required by installation is provided for the thermal element 5 through the top end plane 33, the installation position is flat, the support piece 2 is connected with the thermal element 5 in the vertical direction, the installation height is increased, and the first abdicating surface 31 and the second abdicating surface 32 are designed to respectively abdicate the installation of the armature portion and the iron core support 6, so that the normal installation of the armature portion and the iron core support 6 on the thermal element 5 is not interfered, the design is reasonable, and the matching is reliable.

As shown in fig. 1-2, the bottom both sides of location boss 21 are equipped with two bevel edge guides 23, location boss 21 extends the setting along 2 bottom length directions of support piece, positioning groove 11 is bar form recess, can guide the location boss 21 through bevel edge guides 23 and comparatively smoothly insert in the positioning groove 11 of base 1, wherein, two location boss 21 dorsad be provided with the protruding 24 of interference on the side of installation notch 22 respectively location boss 21 inserts through during positioning groove 11 the protruding 24 extrusion positioning groove 11's of interference inner wall reaches the tight fit installation effect, and installation stability is good.

Further preferred setting, the both sides lateral wall symmetry of support piece 2 is equipped with the multiunit strengthening rib structure 25 of extending two location bosss 21 of connection, because support piece 2 receives external force extrusion in the installation, can promote support piece 2's structural strength through strengthening rib structure 25, prevents that support piece 2 from receiving the extrusion to take place the deformation condition.

In the present embodiment, the support 2 and the thermal element 5 are fixed on the base 1 by a fastening structure 4, and the specific arrangement of the fastening structure 4 is described in detail below with reference to fig. 1 to 3:

the fastening structure 4 comprises a through hole 41 penetrating through the upper end and the lower end of the support member 2, a second through hole 41 arranged at one end of the thermal element 5 and corresponding to the through hole 41, and a bolt component arranged between the through hole 41 and the second through hole 41 in a penetrating manner at the bottom of the base 1, wherein the support member 2 and the thermal element 5 are fastened on the base 1 after the bolt component is locked by nuts. This kind of structure setting, when the installation, passes support piece 2 and 5 one ends of hot component from lower supreme in base 1 bottom with the bolt part to with nut with bolt part locking can be in the same place support piece 2 and link fastening, increased the mounting height of hot component 5, thereby it is fixed to accomplish the installation of support piece 2 and hot component 5 on the base in one step to target in place, mounting structure is simple, it is comparatively convenient to assemble, improves the installation effectiveness.

As a preferred embodiment, a cavity structure and a guide hole column 26 penetrating through the through hole 41 are arranged inside the supporting member 2, the top end of the cavity structure is a closed end, the bottom end of the cavity structure is an open end extending to the bottom of the supporting member 2, and a plurality of supporting ribs 27 connected to the side wall of the guide hole column 26 are arranged around the guide hole column 26 in the cavity structure; wherein, the guide hole post 26 with through-hole 41 set up in support piece 2's central point puts, the both ends of through-hole 41 shaping respectively has toper arc surface 42, and toper arc surface 42 is favorable to the guide bolt part to penetrate fast accurately to through-hole 41 in, and can know through above-mentioned structure, support piece 2 save material of this kind of cavity structural design links to each other in order to strengthen through a plurality of protruding muscle 27 of support with guide hole post 26 the structural strength of guide hole post 26, and structural stability is good.

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 therefrom are within the scope of the utility model.

Claims (9)

1. The utility model provides a bearing structure of moulded case circuit breaker thermomagnetic formula release which characterized in that includes: be the support piece (2) of erectting the form and installing in the holding intracavity of base (1), support piece (2) top is connected with heating element (5), support piece (2) are installed through location structure location in base (1), location structure including set up relatively in two location boss (21) of support piece (2) bottom with correspond set up in just with two positioning groove (11) of two location boss (21) cooperation grafting in base (1), wear to be equipped with between support piece (2) and heating element (5) and install the two fastening structure (4) in base (1).

2. The supporting structure of the molded case circuit breaker thermal-magnetic trip unit according to claim 1, wherein: the positioning structure further comprises: the shaping is in support piece (2) bottom just is located mounting notch (22) between two location bosss (21), and correspond the shaping mounting protrusion (12) between two positioning groove (11), the card of mounting notch (22) looks adaptation is in mounting protrusion (12) are gone up.

3. The supporting structure of the molded case circuit breaker thermal-magnetic trip unit according to claim 2, wherein: the thermomagnetic release comprises an iron core support (6) connected to the thermal element (5) and an armature component rotatably arranged on the iron core support (6), the support piece (2) is in a square shape, and the two sides of the top of the support piece are provided with multilayer step surface structures (3) corresponding to the iron core support (6) and the armature component.

4. The supporting structure of the molded case circuit breaker thermal-magnetic trip unit according to claim 3, wherein: step face structure (3) include highly first face of stepping down (31), second face of stepping down (32) and top plane (33) that increase gradually in proper order, the bottom of armature portion and iron core support (6) extends to respectively first face of stepping down (31) and second face of stepping down (32) department, the one end of hot element (5) bend the butt in on top plane (33) of support piece (2).

5. The supporting structure of the molded case circuit breaker thermal-magnetic trip unit according to claim 4, wherein: the bottom both sides of location boss (21) are equipped with two guiding bevel edges (23), two location boss (21) dorsad be provided with interference arch (24) on the side of installation notch (22) respectively.

6. The molded case circuit breaker thermal-magnetic trip unit support structure of claim 5, wherein: the two side walls of the support piece (2) are symmetrically provided with a plurality of groups of reinforcing rib structures (25) which extend and connect the two positioning bosses (21).

7. The supporting structure of the molded case circuit breaker thermal-magnetic trip unit according to any one of claims 1 to 6, wherein: the fastening structure (4) comprises a through hole (41) which penetrates through the upper end and the lower end of the support piece (2), a threaded hole which is arranged at one end of the thermal element (5) and corresponds to the through hole (41), and a bolt component which penetrates through the through hole (41) upwards from the bottom of the base (1) and is fastened in the threaded hole.

8. The molded case circuit breaker thermal-magnetic trip unit support structure of claim 7, wherein: support piece (2) inside is equipped with the cavity structure, and runs through have guide hole post (26) of through-hole (41), cavity structure top is the blind end, and its bottom is for extending to the open end of support piece (2) bottom, surround in the cavity structure guide hole post (26) are provided with connect in a plurality of support protruding muscle (27) on guide hole post (26) lateral wall.

9. The molded case circuit breaker thermal-magnetic trip unit support structure of claim 8, wherein: the hole guiding column (26) and the through hole (41) are arranged at the central position of the support piece (2), and conical arc surfaces (42) are formed at two ends of the through hole (41) respectively.

Images