CN217485391U - Release and earth leakage protection device - Google Patents

Abstract

The utility model discloses a release and earth leakage protection device relates to the earth leakage protection field. This release includes coil skeleton, elastic component, excitation coil and iron core, and excitation coil locates on the coil skeleton, the iron core is movably install in the coil skeleton, and be in can be relative under the state of excitation coil circular telegram the coil skeleton removes for butt electric leakage mechanism can drive electric leakage mechanism removes. The tripper has the advantages of simple structure, omission of structures such as a static iron core and an ejector rod, small quantity, convenience in assembly and good reliability of a cut-off circuit.

Description

Release and earth leakage protection device

Technical Field

The utility model relates to an earth leakage protection field particularly, relates to a release and earth leakage protection device.

Background

The circuit breaker is mainly used for leakage, overload and short-circuit protection, and is a necessary product of a terminal distribution circuit. Each circuit breaker is provided with an electric leakage release, and the electric leakage release is mainly used for generating magnetism by a coil in the release when electric leakage occurs, and the movable iron core and the ejector rod push the electric leakage mechanism to be unlocked, so that a circuit is cut off, and the purpose of electric leakage protection is achieved.

In the prior art, most of the electric leakage release comprises a static iron core, a movable iron core, an ejector rod, a coil and the like, the structure is complex, the number of parts is large, the assembly is also complex, and time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a release and earth leakage protection device, the simple structure of release, part quantity is less, convenient assembling, and the good reliability that the circuit cut off.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a release, including:

a coil bobbin;

the excitation coil is arranged on the coil framework;

an elastic member;

the iron core is movably arranged on the coil framework and is abutted against the elastic piece; the coil framework moves relative to the coil framework in the energized state of the excitation coil and is used for abutting against the electric leakage mechanism and driving the electric leakage mechanism to move; the elastic member is used to hold the iron core at an initial position in a state where the exciting coil is not energized.

In an alternative embodiment, the iron core includes a fixing rod and a supporting rod connected to each other, and the supporting rod is used for extending out of the coil bobbin in a state where the excitation coil is energized to support the leakage mechanism.

In an alternative embodiment, the fixing rod comprises a first end face and a second end face which are oppositely arranged, and the supporting rod is connected to the first end face;

the elastic piece is sleeved on the abutting rod, one end of the elastic piece abuts against the first end face, and the other end of the elastic piece abuts against the coil framework.

In an optional implementation manner, one end of the coil framework is provided with a first through hole, the other end of the coil framework is provided with a second through hole communicated with the first through hole, the aperture of the second through hole is smaller than that of the first through hole, so that a step surface is formed between the first through hole and the second through hole, and one end, far away from the fixing rod, of the elastic piece abuts against the step surface; the fixing rod is installed in the first through hole, and the second through hole is used for enabling the abutting rod to extend out.

In an alternative embodiment, the first through hole has a diameter corresponding to the outer diameter of the fixing rod, and the second through hole has a diameter corresponding to the outer diameter of the supporting rod.

In an optional embodiment, a limiting block is arranged in the first through hole to limit the moving stroke of the iron core.

In an optional embodiment, the coil frame is provided with a positioning plate, and the positioning plate is used for being mounted to a shell of the earth leakage protection device.

In a second aspect, the present invention provides an earth leakage protection device, comprising an earth leakage mechanism, a housing and a release as in any of the previous embodiments, wherein the release is mounted on the housing with the earth leakage mechanism, and the release is supported by the excitation coil in the energized state.

In an optional embodiment, the housing is provided with a positioning buckle, and the release is clamped with the positioning buckle.

In an optional embodiment, the positioning fastener includes a first fixing plate and a second fixing plate which are oppositely arranged, a first clamping block is convexly arranged on one side of the first fixing plate close to the second fixing plate, a second clamping block is convexly arranged on one side of the second fixing plate close to the first fixing plate, and the first fixing plate, the second fixing plate, the first clamping block and the second clamping block are respectively abutted to the coil bobbin;

be equipped with the opening on the first fixed plate, the opening is used for supplying the iron core stretches out, so that the iron core with electric leakage mechanism butt.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a release, under the state of excitation coil circular telegram, because electricity magnetism, the iron core removes under magnetic action, can stretch out coil skeleton direct and electric leakage mechanism butt, through holding and drive electric leakage mechanism dropout, realizes the cut-off circuit, reaches earth leakage protection's effect, under the state that excitation coil did not switch on, the elastic component can keep the iron core to be located initial position. The tripper has the advantages of simple structure, less quantity, convenience in assembly, contribution to improving the assembly efficiency and reducing the production cost, saves parts such as a static iron core and an ejector rod, and meanwhile has the function of circuit cutting off during electric leakage to realize electric leakage protection.

The embodiment of the utility model provides an earth leakage protection device, including foretell release, convenient assembling, simple structure is favorable to improving assembly efficiency, can be when the electric leakage cutting off circuit, reaches earth leakage protection's purpose.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional structural view of a trip unit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first view angle of an iron core of a trip device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second view angle of an iron core of a trip device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a coil bobbin of a trip unit according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional structure view of a coil bobbin of a trip unit according to an embodiment of the present invention;

fig. 6 is a schematic view of an application scene structure of a release provided by an embodiment of the present invention;

fig. 7 is a schematic structural view of a positioning buckle of the housing according to an embodiment of the present invention.

An icon: 100-a release; 110-a coil former; 111-a first via; 113-a second via; 115-step surface; 117-a stopper; 130-a field coil; 150-a core; 151-fixing bars; 153-a holding bar; 155-a first end face; 157-a second end face; 160-an elastic member; 170-positioning plate; 180-lead; 200-a leakage protection device; 210-a leakage mechanism; 220-a housing; 221-a first fixation plate; 223-a second fixing plate; 225-a first fixture block; 227-a second fixture block; 229-opening; 230-an integrated circuit board; 240-main conductor; 250-mutual inductor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

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 the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

First embodiment

Referring to fig. 1, the present embodiment provides a trip device 100, which omits the structures of the stationary core and the ejector rod, has a small number of parts, a simple structure, and is beneficial to improving the assembly efficiency and reducing the production cost, and has the function of cutting off the circuit during the leakage.

The trip unit 100 includes a bobbin 110, a field coil 130, an elastic member 160, and an iron core 150, the field coil 130 being disposed on the bobbin 110; the iron core 150 is movably mounted to the bobbin 110; when the excitation coil 130 is energized, the current leakage mechanism 210 moves relative to the bobbin 110, and the current leakage mechanism 210 is driven to move by abutting against the current leakage mechanism 210, so that the current leakage mechanism 210 is tripped, and the current leakage protection of the circuit is cut off. The elastic member 160 abuts against the iron core 150, and the elastic member 160 can keep the iron core 150 at the initial position when the exciting coil 130 is not energized. The tripper 100 omits a static iron core, an ejector rod and other structures, reduces the number of parts, optimizes the structure, and simultaneously can achieve reliable leakage protection.

With reference to fig. 2 and 3, optionally, the iron core 150 includes a fixing rod 151 and a supporting rod 153 connected to each other, and the supporting rod 153 is used for extending out of the coil bobbin 110 in a state where the excitation coil 130 is energized to support the leakage mechanism 210. It is easily understood that the core 150 is disposed inside the bobbin 110, and the exciting coil 130 is wound outside the bobbin 110.

With reference to fig. 4 and fig. 5, optionally, one end of the bobbin 110 is provided with a first through hole 111, and the other end is provided with a second through hole 113 communicated with the first through hole 111, a fixing rod 151 is installed in the first through hole 111, and the second through hole 113 is used for extending the supporting rod 153. The aperture of the second through hole 113 is smaller than that of the first through hole 111 to form a stepped surface 115 between the first through hole 111 and the second through hole 113. The fixing rod 151 comprises a first end surface 155 and a second end surface 157 which are oppositely arranged, and the abutting rod 153 is connected with the first end surface 155; the elastic element 160 is sleeved on the supporting rod 153, one end of the elastic element 160 supports against the first end surface 155, and the other end supports against the bobbin 110. Further, one end of the elastic member 160 away from the fixing rod 151 abuts against the step surface 115. The elastic member 160 may be a spring, a leaf spring, or other elastic elements, and is not particularly limited herein.

In this embodiment, the first through hole 111 has an aperture corresponding to the outer diameter of the fixing rod 151, and the second through hole 113 has an aperture corresponding to the outer diameter of the holding rod 153. Set up like this, when iron core 150 removed in the coil firmware, the pore wall of first through-hole 111 can play the guide effect to dead lever 151, and in the same way, the pore wall of second through-hole 113 can play the guide effect to support pole 153 to in iron core 150 stretch out behind coil skeleton 110, can support accurately and hold leakage mechanism 210, reach reliable circuit breaking's purpose.

A stopper 117 is disposed in the first through hole 111 to limit a moving stroke of the iron core 150. It can be understood that the limiting block 117 is used to abut against the first end surface 155 of the fixing rod 151, and when the iron core 150 moves, the iron core cannot extend out of the bobbin 110 continuously after touching the limiting block 117, so as to reach the displacement limit. It should be appreciated that the position of the stop 117 allows for a displacement of the plunger 150 sufficient to allow the plunger 150 to push the leakage mechanism 210 to trip. The limiting block 117 only needs to protrude from the inner wall of the first through hole 111 and can abut against the first end surface 155, which is not limited herein. In this embodiment, the limiting block 117 is disposed on the step surface 115 and extends toward a side close to the fixing rod 151 along the axial direction of the first through hole 111. Of course, without being limited thereto, in other embodiments, the stopper 117 may also be disposed on the wall of the first through hole 111, extending inward along the radial direction of the first through hole 111, and may also serve to limit the displacement of the iron core 150.

The coil bobbin 110 is provided with a positioning plate 170, and the positioning plate 170 is used for being mounted to a housing 220 of the earth leakage protection device 200. The positioning plate 170 may fix the bobbin 110 to the case 220 of the earth leakage protection device 200. In this embodiment, the positioning plates 170 are disposed at two ends of the coil bobbin 110, and are disposed along the radial direction of the coil bobbin 110 in a protruding manner, and the excitation coil 130 is wound on the surface of the coil bobbin 110 and located between the positioning plates 170 at two ends, i.e., the positioning plates 170 further have an effect of restraining the position of the excitation coil 130. Alternatively, the positioning plate 170 and the bobbin 110 may be integrally formed as a whole, or may be fixed together by being separately connected, which is not limited herein. It should be understood that the second through hole 113 extends through one of the positioning plates 170 so that the holding rod 153 of the iron core 150 extends out of the bobbin 110.

Optionally, a lead wire 180 is further disposed on the bobbin 110, the lead wire 180 is electrically connected to the excitation coil 130, and an end of the lead wire 180 away from the bobbin 110 is used for electrically connecting to the integrated circuit board 230. If the leakage current reaches a predetermined value, the integrated circuit board 230 energizes the exciting coil 130 through the lead wire 180, thereby generating a magnetic field to move the iron core 150.

In the release 100 provided in this embodiment, structures such as a stationary core and a push rod are omitted, and the core 150 can move relative to the bobbin 110, and partially extends out of the bobbin 110 to directly abut against the leakage mechanism 210, so as to push the leakage mechanism 210 to release, thereby achieving the purposes of circuit breaking and leakage protection. The release 100 is simple in structure, small in number of parts, high in assembly efficiency, low in production cost, good in reliability of a cut-off circuit and high in practicability.

Second embodiment

With reference to fig. 6 and 7, an embodiment of the present invention provides an earth leakage protection device 200, which includes an earth leakage mechanism 210, a housing 220, and a trip unit 100 according to any of the foregoing embodiments, wherein the trip unit 100 and the earth leakage mechanism 210 are installed in the housing 220, and the trip unit 100 supports the earth leakage mechanism 210 in a state where the excitation coil 130 is energized. Optionally, the housing 220 is provided with a positioning buckle, and the release 100 is clamped with the positioning buckle. In this embodiment, the positioning buckle includes a first fixing plate 221 and a second fixing plate 223 which are arranged oppositely, a first clamping block 225 is convexly disposed on one side of the first fixing plate 221 close to the second fixing plate 223, a second clamping block 227 is convexly disposed on one side of the second fixing plate 223 close to the first fixing plate 221, and the first fixing plate 221, the second fixing plate 223, the first clamping block 225, and the second clamping block 227 are respectively abutted to the bobbin 110, so that the tripping device 100 and the housing 220 are clamped and fixed. Further, an opening 229 is disposed on the first fixing plate 221, and the opening 229 is used for extending the abutting rod 153 of the iron core 150, so that the abutting rod 153 of the iron core 150 abuts against the leakage mechanism 210. It can be understood that, since the first through hole 111 is through, after the trip unit 100 is assembled to the housing 220, the second end surface 157 of the iron core 150 can be abutted against the second fixing plate 223, that is, the iron core 150 is in an initial state, and is maintained in a balanced state by the elastic member 160 and the second fixing plate 223.

It should be noted that the leakage protection device 200 further includes an integrated circuit board 230, a main conductor 240 and a transformer 250, the transformer 250 is connected to the main conductor 240, the transformer 250 is connected to the integrated circuit board 230, if a leakage current is generated in the main conductor 240, the transformer 250 transmits a signal to the integrated circuit board 230, the integrated circuit board 230 can determine the magnitude of the leakage current according to the received signal of the transformer 250, if the leakage current is greater than a preset value, the preset value can be flexibly set according to an actual situation, such as 10mA, 30mA, 50mA or 100mA, and the like, the integrated circuit board 230 can energize the excitation coil 130 through the lead 180, so as to generate a magnetic field on the release 100 to drive the iron core 150 to move, so that the abutting rod 153 of the iron core 150 extends out of the coil frame 110 to abut against the leakage mechanism 210, and push the leakage mechanism 210 to move to trip the leakage mechanism 210, thereby cutting off a circuit, and leakage protection is realized.

With reference to fig. 1 and 6, when the trip device 100 is assembled, the excitation coil 130 is wound around the bobbin 110, and the bobbin 110 is connected with the lead wire 180; the elastic member 160 is sleeved on the iron core 150, the iron core 150 and the elastic member 160 are installed in the coil bobbin 110, the abutting rod 153 penetrates through the first through hole 111 and extends into the second through hole 113, two ends of the elastic member 160 abut against the first end surface 155 and the step surface 115 respectively, and the fixing rod 151 is located in the first through hole 111. The assembled release 100 is integrally mounted on the housing 220, after being assembled with the housing 220, the second end surface 157 of the fixing rod 151 in the iron core 150 abuts against the second fixing plate 223, the elastic member 160 always gives an elastic force to the fixing rod 151 to the left (the direction in which the fixing rod 151 is far away from the abutting rod 153), and the iron core 150 maintains a balanced state, i.e., a static state, under the combined action of the elastic member 160 and the second fixing plate 223.

It is easily understood that, in the absence of leakage current, the magnetic field is not generated by the exciting coil 130, that is, the core 150 is not subject to magnetic force, and in this state, the core 150 is balanced by the elastic force of the elastic member 160 and the abutting action of the second fixing plate 223. If the main conducting wire 240 generates leakage current and the leakage current reaches a preset leakage protection value, the excitation coil 130 of the trip 100 is energized to generate a magnetic field, the iron core 150 moves rightwards under the action of magnetic force, the supporting rod 153 extends out of the coil framework 110 along the second through hole 113 and abuts against the leakage mechanism 210, and the supporting rod 153 pushes the leakage mechanism 210 to rotate anticlockwise so as to trip the leakage mechanism 210, so that a circuit is cut off, and leakage protection is realized.

The contents of other parts not mentioned in this embodiment are similar to those described in the first embodiment, and are not described again here.

To sum up, the embodiment of the present invention provides a release 100 and an earth leakage protection device 200, which have the following beneficial effects:

the embodiment of the utility model provides a release 100, under the state of excitation coil 130 circular telegram, because electricity is magnetic, iron core 150 removes under magnetic force, can stretch out coil skeleton 110 directness and leakage mechanism 210 butt, through holding and drive leakage mechanism 210 dropout, realize the cut-off circuit, reach leakage protection's effect, this release 100 simple structure, parts such as quiet iron core and ejector pin have been saved, quantity is less, and convenient assembling is favorable to improving assembly efficiency, and the reduction in production cost, the function that the circuit cut off when having the leakage simultaneously, realize leakage protection. In addition, the iron core 150 can realize a wire through the first through hole 111 and the second through hole 113 of the bobbin 110 in the moving process, so that the movement is more stable and smooth, the movement precision is higher, and the reliability of circuit cutting is better. Meanwhile, a stopper 117 is disposed in the first through hole 111 to limit the movement displacement of the iron core 150, thereby preventing the iron core 150 from excessively moving.

The embodiment of the utility model provides an earth leakage protection device 200, including foretell release 100, part is small in quantity, convenient assembling, and simple structure is favorable to improving assembly efficiency after release 100's configuration optimization, can be when the electric leakage cut-off circuit, reaches earth leakage protection's purpose, and the practicality is strong, and application scope is wide.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A trip unit, comprising:

a coil former (110);

the excitation coil (130) is arranged on the coil framework (110);

an elastic member (160);

the iron core (150) is movably arranged on the coil framework (110), and the iron core (150) is abutted against the elastic piece (160); under the state that the exciting coil (130) is electrified, the iron core (150) can move relative to the coil framework (110) and is used for abutting against the electric leakage mechanism (210) and driving the electric leakage mechanism (210) to move; the elastic member (160) serves to maintain the iron core (150) at an initial position in a state where the exciting coil (130) is not energized.

2. The trip device according to claim 1, wherein the iron core (150) comprises a fixing rod (151) and a holding rod (153) connected to each other, and the holding rod (153) is used for extending out of the bobbin (110) to hold the leakage mechanism (210) in a state where the exciting coil (130) is energized.

3. The trip unit of claim 2, wherein the fixing bar (151) comprises a first end surface (155) and a second end surface (157) which are oppositely arranged, and the holding bar (153) is connected to the first end surface (155);

the elastic member (160) is sleeved on the abutting rod (153), one end of the elastic member (160) abuts against the first end surface (155), and the other end abuts against the coil framework (110).

4. The release according to claim 3, wherein one end of the bobbin (110) is provided with a first through hole (111), the other end is provided with a second through hole (113) communicated with the first through hole (111), the aperture of the second through hole (113) is smaller than that of the first through hole (111) so as to form a step surface (115) between the first through hole (111) and the second through hole (113), and one end of the elastic member (160) far away from the fixing rod (151) abuts against the step surface (115); the fixing rod (151) is installed in the first through hole (111), and the second through hole (113) is used for allowing the supporting rod (153) to extend out.

5. The trip unit according to claim 4, wherein the first through hole (111) has a hole diameter corresponding to an outer diameter of the fixing rod (151), and the second through hole (113) has a hole diameter corresponding to an outer diameter of the holding rod (153).

6. The trip unit according to claim 4, wherein a stopper (117) is provided in the first through hole (111) to limit a moving stroke of the iron core (150).

7. The trip unit of claim 1, wherein the bobbin (110) has a positioning plate (170) disposed thereon, the positioning plate (170) being adapted to be mounted to a housing (220) of an earth leakage protection device (200).

8. A residual current device, characterized by comprising a residual current mechanism (210), a housing (220), and the trip unit (100) according to any one of claims 1 to 7, wherein the trip unit (100) and the residual current mechanism (210) are mounted to the housing (220), and wherein the trip unit (100) abuts against the residual current mechanism (210) in a state where the exciting coil (130) is energized.

9. Residual current leakage protection device according to claim 8, characterized in that the housing (220) is provided with a positioning catch, and the release (100) is snap-fitted to the positioning catch.

10. The earth leakage protection device as claimed in claim 9, wherein the positioning fastener comprises a first fixing plate (221) and a second fixing plate (223) which are oppositely arranged, a first clamping block (225) is protruded from one side of the first fixing plate (221) close to the second fixing plate (223), a second clamping block (227) is protruded from one side of the second fixing plate (223) close to the first fixing plate (221), and the first fixing plate (221), the second fixing plate (223), the first clamping block (225) and the second clamping block (227) are respectively abutted against the bobbin (110);

an opening (229) is formed in the first fixing plate (221), and the opening (229) is used for enabling the iron core (150) to extend out, so that the iron core (150) is abutted to the electric leakage mechanism (210).

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