Patent Description:
The present application relates to the technical field of a connection device for a power distribution apparatus, and particularly relates to a wiring device for a circuit breaker, and a circuit breaker having same.

When an existing circuit breaker is connected to a power supply, a copper bar or a busbar is usually used for connection. When a copper bar is used for connection, as shown in <FIG>, the copper bar has a first copper bar <NUM> that can be connected to a wiring terminal of a circuit breaker, and a second copper bar <NUM> that is vertically connected to the first copper bar <NUM>. A joint between the first copper bar <NUM> and the second copper bar <NUM> needs to be perforated, and the first copper bar and the second copper bar are connected through a screw, which increases a temperature rise. In addition, considering a creepage distance between copper bars in different phases, the cost is increased, and the temperature rise is also increased. Using a busbar for connection also faces the above same problems. In addition, a busbar needs to be customized in a factory, so that the cost is high.

In order to solve the above-mentioned technical problems, the Chinese patent document <CIT> previously applied by this applicant discloses a power connection mechanism and a molded case circuit breaker. The power connection mechanism includes a first mounting seat and a plurality of conductive assemblies. Each conductive assembly includes a bracket, a clamping member rotatably mounted on the bracket, and a driving structure; the clamping member is provided with a first rotating arm and a second rotating arm which are distributed on two sides of the rotating shaft; the driving structure is arranged on one side of the first rotating arm; and the second rotating arm is opposite to the bracket to form a wire clamping slot for clamping a wiring copper bar. During wiring, a flat wiring copper bar is inserted into the wire clamping slot, and then the first rotating arm is driven to rotate through the driving structure to clamp the wiring copper bar. Due to the longer conductive assemblies, on the one hand, the length of the power connection mechanism is increased, which cannot meet the need of product miniaturization; and on the other hand, the temperature rise of a product is increased. In addition, the structures of the conductive assemblies are relatively complex, which increases the production cost.

<CIT> relates to a molded case circuit breaker for use in connection with a main busbar provided on a distribution board panel includes a power-source-side terminal provided to a front portion of a case and having a terminal assembly hole formed at an upper portion thereof; a base bus supporter comprising a connector protruding from a front surface thereof so as to engage with the main busbar installed on one side of the distribution board panel, the base bus supporter being coupled to an upper surface and a lower surface of the power-source-side terminal; an auxiliary cover plate coupled to an upper portion of the power-source-side terminal and provided with a temperature measurement hole communicating with the terminal assembly hole.

<CIT> concerns an assembly distribution board and, more specifically, to an assembly distribution board, in which vertically stacked main bus bars are inserted into a bus bar stacked connector so as to transmit power of each phase passing through a main circuit breaker to each main bus bar, and thereby the easy installation of the distribution board is possible.

Therefore, the technical problem to be solved in the present application is to overcome the defects that a power connection mechanism in the prior art is longer in length, cannot satisfy product miniaturization and has the defects of large temperature rise and high cost, thus providing a miniaturized wiring device for a circuit breaker, which has small temperature rise and low cost, and a circuit breaker having the wiring device.

To this end, the present application provides a wiring device for a circuit breaker according to claim <NUM>. The dependent claims set out particular embodiments of the invention.

The first conductive elements are provided with second connecting plates which are connected to bottoms of the first connecting plates in an integrally bent manner and are electrically connected to a control circuit inside the circuit breaker body; and the plurality of second connecting plates all extend towards the same side.

The plurality of second connecting plates are all located on the same horizontal plane.

The wiring device for the circuit breaker further includes a second conductive element arranged between the corresponding first busbar part and first connecting plate; and the second conductive element is suitable for staggering the corresponding wiring busbar from the remaining non-corresponding first conductive elements.

The plurality of first busbar parts are all arranged on a first vertical plane; the plurality of second conductive elements are all arranged on a second vertical plane; and the plurality of first connecting plates are all arranged on a third vertical plane.

The plurality of first connecting plates are all arranged upwards or downwards.

A part of the first connecting plates are arranged downwards, and the other part of the first connecting plates are arranged upwards.

According to the invention, the wiring busbar is provided with a second busbar part perpendicular to the first busbar part.

The second conductive element is integrally formed on the first busbar part or the first connecting plate.

The first fastening structure is suitable for fixedly connecting the first busbar part, the second conductive element and the first connecting plate, and the first fastening structure includes: a first through hole which is formed in the first busbar part; a second through hole which is formed in the second conductive element and is opposite to the first through hole; a third through hole which is formed in the first connecting plate and is opposite to the second through hole; a first threaded hole which is formed in a fixing plate and is opposite to the third through hole; and a first bolt which passes through the first through hole, the second through hole, the third through hole and the first threaded hole in sequence to fixedly connect the first busbar part, the second conductive element, the first connecting plate and the fixing plate.

The wire holder is provided with a mounting hole used for mounting the second conductive element, a first passage used for mounting the first connecting plate, and a mounting slot used for mounting the fixing plate in sequence in an insertion direction of the first bolt.

The second conductive element, the first connecting plate and the fixing plate are fixedly connected through a second fastening structure; the second fastening structure includes a fourth through hole which is formed in the second conductive element; a fifth through hole which is formed in the first connecting plate and is opposite to the fourth through hole; a second threaded hole which is formed in the fixing plate and is opposite to the fifth through hole; and a second bolt which passes through the fourth through hole and the fifth through hole in sequence to be in threaded connection with the second threaded hole.

A second passage for communicating the outside to the second connecting plate is arranged between the wire holder and the circuit breaker body.

The wire holder is integrally formed on the circuit breaker body.

The wire holder and the circuit breaker body are arranged separately.

The present application further provides a circuit breaker, including a circuit breaker body, and the above-mentioned wiring device for the circuit breaker.

The technical solution of the present application has the following advantages:.

To describe the specific implementation modes of the present application or the technical solutions in the prior art more clearly, drawings required to be used in the specific implementation modes or the description of the prior art will be briefly introduced below. Apparently, the drawings in the description below are some implementation modes of the present application. Those of ordinary skill in the art can also obtain other drawings according to these drawings without creative work.

Reference numerals in the drawings: <NUM>: first copper bar; <NUM>: second copper bar;
<NUM>: wire holder; <NUM>: busbar slot; <NUM>: second passage; <NUM>: wiring busbar; <NUM>/21a: first busbar part; <NUM>: second busbar part; <NUM>: first conductive element; <NUM>/31a/31b/31c/31d: first connecting plate; <NUM>: second connecting plate; <NUM>: second conductive element; <NUM>: first fastening structure; <NUM>: first through hole; <NUM>: second through hole; <NUM>: third through hole; <NUM>: first threaded hole; <NUM>: fixing plate; <NUM>: second fastening structure; <NUM>: fourth through hole; <NUM>: fifth through hole; <NUM>: second threaded hole; <NUM>: circuit breaker body.

The technical solutions of the present application will be clearly and completely described below in conjunction with the drawings. Apparently, the described embodiments are only a part of the embodiments of the present application, instead of all the embodiments. Based on the embodiments in present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", and the like are orientations or positional relationships as shown in the drawings, and are only for the purpose of facilitating and simplifying the description of the present application instead of indicating or implying that devices or elements indicated must have particular orientations, and be constructed and operated in the particular orientations, so that these terms are not understood as limiting the present application. In addition, the terms "first", "second" and "third" are only for the purpose of description, and may not be understood as indicating or implying the relative importance.

In the description of the present application, it should be also noted that unless otherwise explicitly defined and defined, the terms "mount", "couple" and "connect" should be understood broadly, and may be, for example, fixed connection, or detachable connection, or integral connection, or mechanical connection, or electrical connection, or direct connection, or indirect connection through an intermediate medium, or internal connection between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present application can be understood according to specific situations.

In addition, technical features involved in different implementation modes of the present application described below may be mutually combined as long as they do not constitute conflicts.

A circuit breaker provided by the embodiment, as shown in <FIG> and <FIG>, includes a circuit breaker body <NUM>, and a wiring device arranged on one side of the circuit breaker body <NUM>. The wiring device for the circuit breaker includes a wire holder <NUM>, wiring busbars <NUM>, first conductive elements <NUM>, second conductive elements <NUM>, a first fastening structure <NUM> and a second fastening structure <NUM>.

As shown in <FIG>, the wire holder <NUM> is provided with four busbar slots <NUM> uniformly distributed in a height direction. The wire holder <NUM> is provided with a mounting hole used for mounting the second conductive element <NUM>, a first passage used for mounting a first connecting plate <NUM>, and a mounting slot used for mounting a fixing plate <NUM> in sequence from left to right; and a second passage <NUM> for communicating the outside to a second connecting plate <NUM> is arranged between the wire holder <NUM> and the circuit breaker body <NUM>. In the embodiment, the wire holder <NUM> is integrally formed on the circuit breaker body <NUM>.

There are four wiring busbars <NUM> which can be correspondingly inserted into corresponding busbar slots <NUM>. The wiring busbars <NUM> are provided with first busbar parts <NUM> that are vertically arranged, and second busbar parts <NUM> perpendicular to the first busbar parts <NUM>; the second busbar parts <NUM> prop against mounting plates at bottoms of the busbar slots <NUM>. The four first busbar parts <NUM> are arranged on a first vertical plane. It should be noted that being on the same vertical plane means that the thicknesses of the four first busbar parts <NUM> are the same, and left and right side surfaces of each first busbar part <NUM> are correspondingly located at the same position.

There are four first conductive elements <NUM> which are uniformly arranged on the wire holder <NUM> in a width direction. The first conductive elements <NUM> are L-shaped, and are provided with first connecting plates <NUM> that are vertically arranged, and second connecting plates <NUM> that are connected to bottoms of the first connecting plates <NUM> in an integrally bent manner and are electrically connected to a control circuit inside the circuit breaker body <NUM>. The four first connecting plates <NUM> are all arranged on a third vertical plane and arranged upwards. The four second connecting plates <NUM> all extend towards the same side and are all located on the same horizontal plane.

There are four second conductive elements <NUM>, as shown in <FIG>, which are arranged between the corresponding first busbar parts <NUM> and first connecting plates <NUM>. The second conductive elements <NUM> are suitable for staggering the corresponding wiring busbars <NUM> from the remaining non-corresponding first conductive elements <NUM>. In the embodiment, the four second conductive elements <NUM> are all arranged on a second vertical plane. As shown in <FIG> and <FIG>, the wiring busbar on a bottommost layer is taken as an example for description, since the four first connecting plates (31a, 31b, 31c, 31d) are all arranged on the third vertical plane, in order to avoid that the first busbar part 21a is in lap joint with other first connecting plates (31b, 31c, 31d) while in contact with the first connecting plate 31a, there are gaps for lap joint between the wiring busbars <NUM> and other first connecting plates (31b, 31c, 31d) by the arrangement of the second conductive elements <NUM> to avoid the condition of short circuit.

As shown in <FIG>, the first fastening structure <NUM> includes: a first through hole <NUM> which is formed in the first busbar part <NUM>; a second through hole <NUM> which is formed in the second conductive element <NUM> and is opposite to the first through hole <NUM>; a third through hole <NUM> which is formed in the first connecting plate <NUM> and is opposite to the second through hole <NUM>; a first threaded hole <NUM> which is formed in the fixing plate <NUM> and is opposite to the third through hole <NUM>; and a first bolt which passes through the first through hole <NUM>, the second through hole <NUM>, the third through hole <NUM> and the first threaded hole <NUM> in sequence to fixedly connect the first busbar part <NUM>, the second conductive element <NUM>, the first connecting plate <NUM> and the fixing plate <NUM>. It should be noted that a threaded hole can be directly machined in the first connecting plate <NUM>, so as to eliminate the fixing plate <NUM>.

The second conductive element <NUM>, the first connecting plate <NUM> and the fixing plate <NUM> are fixedly connected through the second fastening structure <NUM>. As shown in <FIG>, the second fastening structure <NUM> includes a fourth through hole <NUM> which is formed in the second conductive element <NUM>; a fifth through hole <NUM> which is formed in the first connecting plate <NUM> and is opposite to the fourth through hole <NUM>; a second threaded hole <NUM> which is formed in the fixing plate <NUM> and is opposite to the fifth through hole <NUM>; and a second bolt which passes through the fourth through hole <NUM> and the fifth through hole <NUM> in sequence to be in threaded connection with the second threaded hole <NUM>. During assembly, the fixing plate <NUM> is first mounted in a mounting slot; the first connecting plate <NUM> of the first conductive element <NUM> is then inserted into the first passage; and the second conductive element <NUM> is finally inserted into the mounting hole. The second conductive element <NUM>, the first connecting plate <NUM> and the fixing plate <NUM> are fixedly connected through the second fastening structure.

As a changeable implementation mode, as shown in <FIG>, the four first connecting plates <NUM> are all arranged downwards.

As a changeable implementation mode, as shown in <FIG> and <FIG>, two of the four first connecting plates <NUM> are arranged downwards, and the other two first connecting plates <NUM> are arranged upwards. In this way, the overall height of the four first busbar parts can be reduced, so that the copper consumption is low. On the one hand, the production cost is reduced, and on the other hand, more energy is saved, and low energy consumption is achieved.

As a changeable implementation mode, as shown in <FIG>, the four first connecting plates <NUM> are all arranged on a third vertical plane, and the lengths of the four second conductive elements <NUM> are gradually increased from top to bottom.

As a changeable implementation mode, as shown in <FIG> and <FIG>, the plurality of wiring busbars <NUM> are arranged in a stepped manner, and each layer is only composed of the wiring busbar <NUM>, the first conductive element <NUM> and the fixing plate <NUM>.

As a changeable implementation mode, as shown in <FIG>, the second conductive element <NUM> is integrally formed on the first busbar part <NUM> or the first connecting plate <NUM>, that is, the second conductive element <NUM> can be welded or riveted on the first busbar part <NUM>. The second conductive element <NUM> and the first conductive element <NUM> can be directly formed by stamping the same plate, or the second conductive element <NUM> and the first conductive element <NUM> are connected in an integrally bent manner.

As a changeable implementation mode, the first fastening structure and the second fastening structure can be riveted or welded.

As a changeable implementation mode, the wire holder <NUM> and the circuit breaker body <NUM> are arranged separately.

As a changeable implementation mode, the wiring device can be simultaneously connected to <NUM>, <NUM>, <NUM> or more circuit breakers.

It should be noted that the wiring device of the present application can also be applied to a contactor, a fuse, and other power distribution apparatuses.

Claim 1:
A wiring device for a circuit breaker, comprising:
a wire holder (<NUM>) which is arranged on a circuit breaker body (<NUM>) and is provided with a plurality of busbar slots (<NUM>) distributed in a height direction;
a plurality of wiring busbars (<NUM>) which are correspondingly inserted into the plurality of busbar slots (<NUM>), and are provided with first busbar parts (<NUM>) that are vertically arranged;
a plurality of first conductive elements (<NUM>) which are arranged on the wire holder (<NUM>) at intervals in a width direction, and are provided with first connecting plates (<NUM>) that are vertically arranged; and
a first fastening structure (<NUM>) which is used for fixedly connecting the first busbar part (<NUM>) to the first connecting plate (<NUM>);
characterized in that the wiring busbar (<NUM>) is provided with a second busbar part (<NUM>) perpendicular to the first busbar part (<NUM>), so that the wiring busbars (<NUM>) are L-shaped.