CN219203073U

CN219203073U - Thermomagnetic release and molded case circuit breaker with same

Info

Publication number: CN219203073U
Application number: CN202223612838.5U
Authority: CN
Inventors: 钱舟航; 詹丽英; 吴琼露; 林筱轶; 杨红艺
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-16
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to the technical field of piezoelectric devices, and aims to provide a thermomagnetic release and a molded case circuit breaker with the thermomagnetic release. One end of the armature in the thermomagnetic release is inserted into the bracket, and the other end of the armature is clamped with the bracket, so that the mounting difficulty is reduced, the mounting time is shortened, and the production efficiency is improved. The thermomagnetic release includes: the device comprises a bracket, an armature, a magnetic yoke and an elastic element; one side of the bracket is provided with a mounting hole, and the other side is provided with a clamping groove; one side of the armature is provided with a bump which is rotationally connected with the mounting hole, and the other side of the armature is provided with a clamping piece which is in clamping connection with the clamping groove; the magnetic yoke is connected with the bracket and is positioned below the connection point of the bracket and the armature; one end of the elastic element is connected with the armature, and the other end is connected with the magnetic yoke. The utility model solves the problems of the prior art that the mounting difficulty is high, the mounting time is long and the efficiency is low when the armature of the thermomagnetic release and the bracket are mounted.

Description

Thermomagnetic release and molded case circuit breaker with same

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a thermomagnetic release and a molded case circuit breaker with the thermomagnetic release.

Background

The molded case circuit breaker is an important protection device in a low-voltage power distribution system, and plays a role in switching on and switching off working current in the low-voltage power distribution system. The release is usually arranged in the molded case circuit breaker, so that the molded case circuit breaker has the functions of short circuit protection, overload protection and the like. The trip device can be divided into an electronic type and a thermo-magnetic type, wherein the thermo-magnetic type trip device is more applied, and the thermo-magnetic type trip device generally comprises a bimetallic strip, a heating element, an armature, a bracket, a magnetic yoke and the like. When overload protection is realized, the molded case circuit breaker is heated and deformed through the bimetallic strip to drive the traction rod to act, and the traction rod unlocks the operating mechanism, so that tripping and opening are realized; when realizing short-circuit protection, generally, because the current is too big in the circuit, lead to the yoke to produce great suction, make armature and yoke actuation, armature can rotate around its junction with the support, and then armature can drive the action of traction lever, and the traction lever unlocks operating device to realize the trip and break brake.

The two sides of the armature in the existing thermomagnetic release are provided with the convex blocks, and then the convex blocks are inserted into the mounting holes at the two sides of the bracket, so that the armature is fixed. In order to prevent the armature from falling off the support, most of the mounting holes on the support are closed round holes, or even if the mounting holes are not closed holes, limiting blocks are arranged at the openings of the mounting holes to prevent the protruding blocks from falling off from the mounting holes. Because the protruding blocks on two sides of the armature are required to be inserted into the mounting holes on the support, and the distance between the protruding blocks on two sides of the armature is larger than the distance between the mounting holes on two sides of the support, the mounting difficulty of the armature is larger, the required mounting time is longer, and the efficiency is low.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects that in the prior art, the distance between the convex blocks on two sides of the armature is larger than the distance between the convex blocks on two sides of the bracket, so that the difficulty is larger when the armature is installed with the bracket, the required installation time is longer and the efficiency is low, and therefore, one end of the armature is spliced with the bracket, and the other end is clamped with the bracket, so that the installation difficulty is reduced, the installation time is shortened, and the production efficiency is improved.

To this end, the utility model provides a thermo-magnetic release comprising:

the bracket is provided with a mounting hole on one side and a clamping groove on the other side;

the armature is provided with a protruding block on one side, the protruding block is rotationally connected with the mounting hole, and a clamping piece is arranged on the other side and is in clamping connection with the clamping groove;

the magnetic yoke is connected with the bracket and is positioned below the connection point of the bracket and the armature;

and one end of the elastic element is connected with the armature, and the other end of the elastic element is connected with the magnetic yoke.

Optionally, the support includes first curb plate, second curb plate and connecting plate, first curb plate with the second curb plate set up in the connecting plate both sides, just first curb plate with the second curb plate perpendicular to the connecting plate sets up.

Optionally, the first side plate is provided with the mounting hole, the mounting hole is a round hole, the second side plate is provided with the clamping groove, and the upper end of the clamping groove is provided with an opening.

Optionally, the bump is in a regular quadrangular shape, and a distance between two opposite lateral edges of the bump is equal to a diameter of the mounting hole.

Optionally, the clamping piece has connecting portion and joint portion, connecting portion with armature connection, the top of joint portion with the bottom of connecting portion is connected.

Optionally, the armature is provided with the one side of joint spare has spacing portion, spacing portion is located the top of joint spare, just the bottom surface of spacing portion with the top surface joint of second curb plate.

Optionally, the armature has first linking arm and second linking arm, the top of first linking arm has the trigger part, first connecting hole has been seted up on the second linking arm, the one end of elastic component with first connecting hole is connected.

Optionally, the yoke with the connecting plate orientation the lateral wall fixed connection of armature one side, just the yoke is located between the first curb plate with the second curb plate, seted up the second connecting hole on the yoke, the other end of elastic element with the second connecting hole is connected.

Optionally, the thermo-magnetic release further comprises a thermal element and a bimetallic strip, wherein the thermal element is fixedly connected with the magnetic yoke, and the bimetallic strip is connected with the thermal element.

The molded case circuit breaker comprises the thermomagnetic release and also comprises a traction rod, wherein the traction rod is contacted with one end of the bimetallic strip and one end of the armature.

The utility model has the following advantages:

1. according to the thermomagnetic release, one side of the support is provided with the mounting hole, the other side of the support is provided with the clamping groove, one side of the armature is provided with the convex block, the other side of the armature is provided with the clamping piece, and the convex block is inserted into the mounting hole and is rotationally connected with the mounting hole, and the clamping piece is in clamping connection with the clamping groove. When the armature is connected with the bracket, the protruding block is inserted into the mounting hole, and then the clamping piece is clamped with the clamping groove. The connection is simple, the time spent in installation is less, and the production efficiency is improved.

2. The utility model provides a thermomagnetic release, which comprises a bracket, wherein the bracket comprises a first side plate, a second side plate and a connecting plate, a clamping groove with an opening at the upper end is formed in the second side plate, and a clamping piece on an armature is clamped with the clamping groove from the opening when being connected with the clamping groove. Through set up the opening in the upper end of draw-in groove, be convenient for joint spare and draw-in groove joint, reduced the installation degree of difficulty, improve work efficiency.

3. The molded case circuit breaker comprises the thermomagnetic release and the traction rod, wherein the traction rod is driven to act by the bimetallic strip or the armature iron, so that the molded case circuit breaker is in a breaking state, and overload protection and short-circuit protection are realized. The thermomagnetic release is simple and convenient to install, the required installation time is short, the production efficiency is high, the thermomagnetic release is fast in release speed and response, and the safety of the molded case circuit breaker is higher.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a thermal magnetic trip of the present utility model;

FIG. 2 is a schematic diagram of another view of the thermal magnetic release of the present utility model;

FIG. 3 is a schematic diagram of a bracket in a thermal magnetic release according to the present utility model;

fig. 4 is a schematic diagram of an armature in a thermal magnetic release according to the present utility model.

Reference numerals illustrate:

1. the device comprises a bracket, 101, mounting holes, 102, clamping grooves, 103, a first side plate, 104, a second side plate, 105 and a connecting plate;

2. the armature, 201, the bump, 202, the clamping piece, 2021, the connecting part, 2022, the clamping part, 203, the limiting part, 204, the first connecting arm, 205, the second connecting arm, 206, the triggering part, 207 and the first connecting hole;

3. a yoke 301, a second connection hole;

4. an elastic element;

5. a thermal element;

6. bimetallic strips.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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 utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 and 2, the thermo-magnetic release according to the preferred embodiment of the present utility model can be applied to electrical components such as molded case circuit breakers and leakage switches, and the molded case circuit breakers can be short-circuit protected or overload protected by the thermo-magnetic release. The thermomagnetic release has lower installation difficulty, shorter installation time and greatly improved production efficiency.

The thermomagnetic release includes: a bracket 1, an armature 2, a yoke 3 and an elastic element 4. The bracket 1 is mainly used for installing the armature 2 and the magnetic yoke 3, one side of the bracket 1 is provided with a mounting hole 101, the other side is provided with a clamping groove 102, and the bracket is connected with the armature 2 through the mounting hole 101 and the clamping groove 102. Specifically, as shown in fig. 3, the bracket 1 includes a first side plate 103, a second side plate 104, and a connection plate 105, the first side plate 103 and the second side plate 104 are disposed on both sides of the connection plate 105, the height of the first side plate 103 and the second side plate 104 is greater than the height of the connection plate 105, and the first side plate 103 and the second side plate 104 are disposed perpendicular to the connection plate 105. The first side plate 103 is provided with a mounting hole 101, in this embodiment, the mounting hole 101 is a round hole, the second side plate 104 is provided with a clamping groove 102, the upper end of the clamping groove 102 is provided with an opening, and the shape of the clamping groove 102 is similar to a U-shaped groove.

Further, a bump 201 is provided on one side of the armature 2, the bump 201 is rotationally connected with the mounting hole 101, a clamping piece 202 is provided on the other side, and the clamping piece 202 is in clamping connection with the clamping groove 102. When the armature 2 and the bracket 1 are installed, the protruding block 201 on the armature 2 is inserted into the installation hole 101, then the clamping piece 202 enters from the opening at the upper end of the clamping groove 102, and the clamping piece 202 is clamped with the clamping groove 102. Compared with the prior art that the two ends of the armature 2 are provided with the convex blocks 201 which are connected with the bracket 1, the novel armature is more convenient to install by inserting one end into the other end and clamping the other end, has lower installation difficulty, can save installation time and improves production efficiency.

Further, as shown in fig. 4, the armature 2 is approximately H-shaped, and has a first connecting arm 204 and a second connecting arm 205, and a bump 201 is disposed on a side wall of the first connecting arm 204, in this embodiment, the bump 201 is preferably in a regular quadrangular prism shape, and a distance between two opposite side edges of the bump 201 is equal to a diameter of the mounting hole 101. The top end of the first connecting arm 204 is provided with a trigger part 206, and the trigger part 206 is U-shaped and is used for pushing the traction rod.

The clamping member 202 is disposed on a side wall of the second connecting arm 205, and specifically, the clamping member 202 has a connecting portion 2021 and a clamping portion 2022, the connecting portion 2021 is connected with the side wall of the second connecting arm 205, and a top end of the clamping portion 2022 is connected with a bottom end of the connecting portion 2021. Further, the cross-sectional shape of the clamping portion 2022 is a right trapezoid, and the side wall of the clamping portion 2022 close to the second connecting arm 205 is an inclined plane, and the distance from the top end of the clamping portion 2022 to the side wall of the second connecting arm 205 is smaller than the distance from the bottom end of the clamping portion 2022 to the side wall of the second connecting arm 205. The distance from the top end of the clamping portion 2022 to the side wall of the second connecting arm 205 is equal to or greater than the thickness of the second side plate 104. The clamping part 2022 enters from the opening at the upper end of the clamping groove 102 and is clamped with the clamping groove 102 to fix the armature 2, so that the installation is convenient and simple.

The second connecting arm 205 is provided with a limiting part 203 on one side of the clamping piece 202, the limiting part 203 is located above the clamping piece 202, and the bottom surface of the limiting part 203 is clamped with the top surface of the second side plate 104. The fixing and limiting of the armature 2 are enhanced by the limiting part 203, so that the clamping piece 202 is not easy to separate from the clamping groove.

In addition, the second connecting arm 205 is provided with a first connecting hole 207, and the first connecting hole 207 is a round hole for hanging the elastic element 4.

The magnetic yoke 3 is connected with the bracket 1, and the magnetic yoke 3 is positioned below the connection point of the bracket 1 and the armature 2, and the magnetic yoke 3 can attract the armature 2 to rotate around the connection point of the armature 2 and the bracket 1. The yoke 3 is fixedly connected with the side wall of the connecting plate 105 facing the armature 2, and the yoke 3 is positioned between the first side plate 103 and the second side plate 104, i.e. the yoke 3 is surrounded by the connecting plate 105, the first side plate 103 and the second side plate 104 of the bracket 1. The yoke 3 is provided with a second connecting hole 301, and the second connecting hole 301 is also a round hole for hanging the elastic element 4.

One end of the elastic element 4 is connected with the armature 2, and the other end is connected with the yoke 3. In particular, the elastic element 4 is preferably a spring, one end of which is connected to the first connection hole 207 on the armature 2 and the other end of which is connected to the second connection hole 301 on the yoke 3. The elastic element 4 is used for resetting the armature 2, and when a short circuit occurs in the circuit, the yoke 3 attracts the armature 2, so that the armature 2 rotates. When the magnet yoke 3 no longer attracts the armature 2, the armature 2 can be driven to reversely rotate and reset under the action of the elastic element 4.

In addition, the thermomagnetic release further comprises a thermal element 5 and a bimetallic strip 6, wherein the thermal element 5 is fixedly connected with the magnetic yoke 3, the bimetallic strip 6 is connected with the thermal element 5, and the bimetallic strip 6 is positioned on one side of the magnetic yoke 3 away from the connecting plate 105. The heat is transferred to the bimetallic strip 6 through the thermal element 5, and the bimetallic strip 6 is deformed when being heated, so that the traction rod can be pushed.

The embodiment also provides a molded case circuit breaker, which comprises a thermomagnetic release and a traction rod, wherein the traction rod is contacted with one end of the bimetallic strip 6 and one end of the armature 2.

The following describes the operation of the molded case circuit breaker as follows:

the plastic shell circuit breaker has the functions of short-circuit protection and overload protection, and after the plastic shell circuit breaker is connected into a circuit, the circuit can be tripped and disconnected when the circuit is short-circuited or overloaded, and the circuit is cut off in time.

Specifically, when overload occurs in the circuit, heat is rapidly generated in the circuit, the heat is transferred to the bimetallic strip 6 through the thermal element 5, the bimetallic strip 6 deforms, one end of the bimetallic strip 6, which is in contact with the traction rod, pushes the traction rod, the traction rod can unlock the operating mechanism, the molded case circuit breaker is in a trip brake-separating state, and at the moment, contacts in the molded case circuit breaker are broken, and the circuit is broken.

When a short circuit occurs in a circuit, the magnetic yoke 3 generates larger magnetic attraction force, so that the armature 2 is attracted, the armature 2 rotates around a connection point between the armature 2 and the bracket 1 until the lower half part of the armature 2 is attracted with the magnetic yoke 3, along with the rotation of the armature 2, the trigger part 206 on the first connecting arm 204 of the armature 2 drives the traction rod in contact with the traction rod to act, and the traction rod can unlock the operating mechanism, so that the molded case circuit breaker is in a state of tripping and opening, and at the moment, contacts in the molded case circuit breaker are disconnected, and the circuit is disconnected. And the elastic element 4 is stretched as the armature 2 rotates.

When the circuit returns to normal, the magnetic yoke 3 does not attract the armature 2 any more, and under the action of the elastic element 4, the armature 2 is driven to reversely rotate, so that the reset is realized.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A thermo-magnetic release comprising:

the device comprises a bracket (1), wherein one side of the bracket (1) is provided with a mounting hole (101), and the other side of the bracket is provided with a clamping groove (102);

the armature (2), one side of the armature (2) is provided with a protruding block (201), the protruding block (201) is rotationally connected with the mounting hole (101), the other side is provided with a clamping piece (202), and the clamping piece (202) is in clamping connection with the clamping groove (102);

the magnetic yoke (3) is connected with the bracket (1), and the magnetic yoke (3) is positioned below the connection point of the bracket (1) and the armature (2);

and one end of the elastic element (4) is connected with the armature (2), and the other end of the elastic element (4) is connected with the magnetic yoke (3).

2. The thermomagnetic release according to claim 1, wherein the bracket (1) comprises a first side plate (103), a second side plate (104) and a connecting plate (105), the first side plate (103) and the second side plate (104) are arranged on two sides of the connecting plate (105), and the first side plate (103) and the second side plate (104) are arranged perpendicular to the connecting plate (105).

3. The thermomagnetic release according to claim 2, wherein the first side plate (103) is provided with the mounting hole (101), the mounting hole (101) is a circular hole, the second side plate (104) is provided with the clamping groove (102), and an opening is formed at the upper end of the clamping groove (102).

4. The thermomagnetic release according to claim 3, wherein the protrusion (201) has a regular quadrangular shape, and a distance between two opposite lateral edges of the protrusion (201) is equal to a diameter of the mounting hole (101).

5. The thermomagnetic trip according to claim 1, wherein the clamping member (202) has a connecting portion (2021) and a clamping portion (2022), the connecting portion (2021) is connected to the armature (2), and a top end of the clamping portion (2022) is connected to a bottom end of the connecting portion (2021).

6. The thermomagnetic release according to claim 2, wherein a limiting portion (203) is provided on a side of the armature (2) where the clamping piece (202) is provided, the limiting portion (203) is located above the clamping piece (202), and a bottom surface of the limiting portion (203) is clamped with a top surface of the second side plate (104).

7. The thermomagnetic trip according to claim 2, wherein the armature (2) has a first connecting arm (204) and a second connecting arm (205), the top end of the first connecting arm (204) has a trigger portion (206), the second connecting arm (205) is provided with a first connecting hole (207), and one end of the elastic element (4) is connected with the first connecting hole (207).

8. The thermomagnetic release according to claim 7, wherein the yoke (3) is fixedly connected with a side wall of the connecting plate (105) facing one side of the armature (2), the yoke (3) is located between the first side plate (103) and the second side plate (104), a second connecting hole (301) is formed in the yoke (3), and the other end of the elastic element (4) is connected with the second connecting hole (301).

9. The thermomagnetic release according to claim 1, further comprising a thermal element (5) and a bimetal (6), the thermal element (5) being fixedly connected to the yoke (3), the bimetal (6) being connected to the thermal element (5).

10. A molded case circuit breaker comprising the thermo-magnetic release of claim 9, and further comprising a traction rod in contact with one end of the bimetal (6) and one end of the armature (2).