CN111276918A

CN111276918A - Terminal box

Info

Publication number: CN111276918A
Application number: CN201811472173.8A
Authority: CN
Inventors: 王春喜; 丁涛; 刘志刚; 雷晓林; 梁黎君; 卫军娟
Original assignee: CRRC Yongji Electric Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2020-06-12

Abstract

The invention provides a junction box, and relates to the technical field of motors. The junction box provided by the invention is used for connecting a multiphase motor with a power supply and comprises a box body; three copper bar layers are arranged in the box body along the first direction in parallel; each copper bar layer comprises a plurality of copper bars with the same number, and the plurality of copper bars are arranged side by side along a second direction perpendicular to the first direction; the first direction is the direction of height of box body, the second direction is one of the length direction and the width direction of box body. According to the junction box provided by the invention, the plurality of copper bars electrically connected with the multiphase motor are divided into three layers in an array arrangement, so that the space in the junction box can be fully utilized, and the sufficient electric clearance and creepage distance between the adjacent copper bars can be ensured, so that the junction box has sufficient safety performance, and meanwhile, the junction box is convenient to install in equipment with narrow space.

Description

Terminal box

Technical Field

The invention relates to the technical field of motors, in particular to a junction box.

Background

The junction box is mainly used for protecting the electric wire and the connecting electric wire, so that the connection between the motor and the electric wire is prevented from being influenced by the external environment, and the electric connection of the motor is ensured to be more reliable.

The current terminal box is generally used for connecting the three-phase motor, and this terminal box includes the box body, and three mutually independent cavity has been separated into along the direction of height of this box body to the space inside the box body to the connecting wire of three-phase motor can stretch into respectively in this three independent cavity and be connected with copper bar and three phase current's electric wire electricity.

However, as the motor is gradually applied to ships, automobiles and rail trains, the demand for the power of the motor is gradually increased, and the existing three-phase motor cannot meet the demand, so that a nine-phase motor more than three phases is developed. However, if the junction box continues to use the structure of the junction box of the existing three-phase motor, the independent cavity required in the box body is greatly increased, the height of the junction box is increased too much, and the use of the junction box is affected.

Disclosure of Invention

The invention aims to provide a junction box, which is used for solving the defects in the prior art, and the number of the copper bars in each copper bar layer is increased, so that the number of the stacked layers of the copper bars is reduced, the height of the whole arrangement of the copper bars in a single direction is reduced, and the problems of large volume and inconvenient installation of the conventional junction box are effectively solved.

The invention provides a junction box which is used for connecting a multiphase motor with a power supply and comprises a box body;

three copper bar layers are arranged in the box body side by side along a first direction;

each copper bar layer comprises a plurality of copper bars with the same number, and the plurality of copper bars are arranged side by side along a second direction perpendicular to the first direction;

the first direction is the direction of height of box body, the second direction is one of the length direction and the width direction of box body.

Optionally, two adjacent copper bar layers are staggered along the second direction.

Optionally, the lengths of the plurality of copper bars in each layer of copper bars increase along the second direction.

Optionally, a first limiting block is arranged between two adjacent copper bars.

Optionally, a second limiting block is arranged between two adjacent copper bar layers.

Optionally, the method further comprises: the cover plate is fixed on the three copper bar layers in the box body, the cover plate covers the box body, and a sealing ring is arranged between the box body and the cover plate.

Optionally, the box body and the cover plate are also fastened by a plurality of fasteners.

Optionally, a plurality of the fasteners are uniformly arranged at the top end of the side wall of the box body.

Optionally, the junction box further comprises a plurality of adapters, and each copper bar is connected with the power supply through one adapter.

Optionally, the adaptor comprises a connecting plate and a mounting plate which are arranged in parallel, and a vertical plate located between the connecting plate and the mounting plate;

the connecting plate and the mounting plate are respectively fixed with two ends of the vertical plate and are positioned on two opposite sides of the vertical plate;

the mounting panel is used for fixing one end of the copper bar with the bottom surface of the box body.

The junction box provided by the invention is used for connecting a multiphase motor with a power supply and comprises a box body; three copper bar layers are arranged in the box body side by side along a first direction; each copper bar layer comprises a plurality of copper bars with the same number, and the plurality of copper bars are arranged side by side along a second direction perpendicular to the first direction; the first direction is the direction of height of box body, the second direction is one of the length direction and the width direction of box body. According to the junction box provided by the invention, the plurality of copper bars electrically connected with the multi-phase motor are divided into three layers in an array arrangement, so that the space in the junction box can be fully utilized, and sufficient electric clearance and creepage distance can be ensured between the adjacent copper bars, so that the junction box is ensured to have sufficient safety performance, and meanwhile, the junction box is conveniently arranged in equipment with narrow space, so that a high-power multi-phase motor is used for driving rail vehicles, naval vessels and the like.

Drawings

The above advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a first junction box according to an embodiment;

fig. 2 is a schematic structural view of a second junction box provided in the second embodiment;

FIG. 3 is a top view of a third junction box according to the third embodiment;

FIG. 4 is a front view of a third junction box according to the third embodiment;

FIG. 5 is a schematic structural diagram of a third junction box provided in the third embodiment from a viewing angle;

FIG. 6 is a schematic structural diagram of a third junction box provided in the third embodiment from another perspective;

FIG. 7 is a schematic structural diagram of a first stopper provided in the third embodiment;

fig. 8 is a schematic structural diagram of a second limiting block provided in the third embodiment.

Reference numerals:

1: a box body; 2: copper bars; 3: a first transfer member;

4: a second adaptor; 5: a fixing plate; 6: an insulating block;

7: a conduction plate; 8: a first stopper; 9: a second limiting block;

10: connecting through holes; 11: a Glan joint; 12: a ground copper bar;

13: a ground block; 14: a rack fixing hole; 15: a cover plate mounting hole;

16: a first portion; 17: a second portion; 18: a first side wall;

19: a second side wall; 20: a fastener.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The following describes the technical solutions of the present invention and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.

It should be noted that the terms "first", "second", "upper", "lower", "left", "right", "bottom", "top", "front", "back", etc. in the description and claims of the present invention and the accompanying drawings indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Example one

Fig. 1 is a schematic structural diagram of a first junction box provided in this embodiment. The junction box provided by the embodiment is used for being installed on a frame of a motor to connect the motor with an external power supply, and comprises a box body 1, wherein three copper bar layers are arranged in the box body 1 side by side along the height direction of the box body 1; each copper bar layer all includes a plurality of copper bars 2 of the same quantity, and is a plurality of copper bar 2 sets up side by side along one in the length direction and the width direction of box body.

Specifically, the box body 1 includes a top surface and a bottom surface arranged in parallel, and a sidewall between the top surface and the bottom surface for connecting the bottom surface and the top surface. In some alternative embodiments, the box body 1 may be a rectangular parallelepiped structure, and the box body 1 may include a bottom surface, four side walls perpendicular to the edges of the bottom surface, and a cover plate to form a complete box body. For another example, the box body 1 may also be formed by combining a bottom plate and a fastening cover, for example, a square fastening cover is directly fastened on the upper surface of a rectangular bottom plate to form a complete box body 1 with the rectangular bottom plate. Specifically, the case 1 may be made of plastic by a molding process, or may be made of metal by molding and welding. For example, in the embodiment, referring to fig. 1, the box body 1 is a square box made of plastic through a molding process, so that the box body 1 has insulation, and the internal wiring safety of the junction box is ensured. Generally, the bottom surface or any one of the side walls of the box body 1 can be used as a mounting surface for the junction box and the motor frame. For example, in the present embodiment, as shown in fig. 1, the outer surface of the first side wall 18 of the box body 1 is used as a mounting surface for the junction box and the motor housing.

Specifically, the plurality of copper bars 2 in each copper bar layer may adopt a columnar or plate-shaped structure. For example, in some alternative embodiments, the copper bar 2 may be a long-strip-shaped plate-shaped structure, so that a mounting hole is conveniently formed in the plate-shaped copper bar 2, and the copper bar 2 and other components inside the junction box are conveniently connected together. For another example, in this embodiment, please refer to fig. 1, the shape of the copper bar 2 may be a long and thin cylinder, and since the cross-sectional shape of the cylinder is circular, under the condition that the safety gap between adjacent copper bars 2 is ensured, each copper bar 2 in the copper bar layer is uniformly arranged more compactly, neatly and beautifully.

Specifically, in this embodiment, please continue to refer to fig. 1, the z-axis direction is the height direction of the box body 1, the x-axis direction is the length direction of the box body 1, the y-axis direction is the width direction of the box body 1, three copper bar layers are arranged in the box body 1 along the z-axis direction side by side, each copper bar layer includes a plurality of copper bars 2 of the same number, and the plurality of copper bars 2 are arranged along the y-axis direction side by side. Of course, a plurality of the copper bars 2 may also be arranged side by side along the x-axis direction, and this embodiment is not particularly limited.

All the one end of copper bar 2 in the three-layer copper bar layer can be realized through being connected with box body 1 and be connected with the inside binding post's of motor electricity, and the other end of copper bar 2 then is connected with power supply to this realizes that external power source provides the required power of motor operation for the motor. As shown in fig. 1, one end of all the copper bars 2 in the three copper bar layers is connected with the first side wall 18 of the box body 1, and the other end of all the copper bars 2 in the three copper bar layers is used as a free end connected with a power supply.

In the present embodiment, the lengths of the plurality of copper bars 2 in each copper bar layer may be equal or different. For example, in some alternative embodiments, the length of the plurality of copper bars 2 in each copper bar layer along the direction in which the plurality of copper bars 2 are arranged side by side may gradually increase. Taking fig. 1 as an example, the plurality of copper bars 2 of each layer may be increased in length along the direction of the y-axis. Of course, in other embodiments, the lengths of the plurality of copper bars 2 in each copper bar layer along the direction in which the plurality of copper bars 2 are arranged side by side may gradually decrease. Continuing with fig. 1 as an example, the plurality of copper bars 2 of each layer may also decrease in length along the y-axis.

In some alternative embodiments, the lengths of all the copper bars 2 in each copper bar layer may be identical, for example, fig. 1 shows that the lengths of three copper bars 2 in each copper bar layer are all identical. Of course, the lengths of the copper bars 2 in the three copper bar layers may be equal or different. For example, in some alternative embodiments, all the copper bars 2 in the three copper bar layers have the same length. Of course, in some other embodiments, the length of the copper bar 2 in two copper bar layers in the three copper bar layers is equal, and the length of the copper bar 2 in the remaining copper bar layer can be longer than the length of the copper bar 2 in the two copper bar layers, and certainly can also be shorter than the length of the copper bar 2 in the two copper bar layers. Referring to fig. 1, in the embodiment, the three copper bar layers gradually increase the length of the copper bar 2 in each copper bar layer along the z-axis toward the bottom surface of the box body 1, so that the copper bars 2 in each copper bar layer are differentiated in length, thereby facilitating the wiring of different copper bar layers.

The specific number of the copper bars 2 in each copper bar layer is determined according to the number of phases of the motor. For example, in this embodiment, please refer to fig. 1, can include three copper bar 2 in every copper bar layer, and three copper bar 2 is arranged along y axle direction interval, sets up to three through the quantity of copper bar 2 in every copper bar layer, and three copper bar layer has just formed three and has taken advantage of three matrix and arrange, so, can realize nine looks motors and external power source's electric connection under the condition that does not increase the terminal box volume. Of course, the number of the copper bars 2 in each copper bar layer may also be two or one, and this embodiment is not particularly limited.

The junction box provided by the embodiment comprises a box body 1; three copper bar layers are arranged in the box body 1 side by side along a first direction; each copper bar layer comprises a plurality of copper bars 2 with the same quantity, and the plurality of copper bars 2 are arranged side by side along a second direction perpendicular to the first direction; the first direction is the height direction of the box body 1, and the second direction is one of the length direction and the width direction of the box body 1. The three-layer copper bar structure is characterized in that the plurality of copper bars 2 electrically connected with the multi-phase motor are divided into an array to be arranged into three layers, so that the space in the junction box can be fully utilized, and sufficient electric gaps and creepage distances can be guaranteed between the adjacent copper bars 2, so that the junction box is guaranteed to have sufficient safety performance, and meanwhile, the junction box is convenient to install in equipment with narrow space, so that a high-power multi-phase motor is used for driving rail vehicles, naval vessels and the like.

Example two

Fig. 2 is a schematic structural diagram of a second junction box provided in this embodiment. On the basis of the above embodiment, the present embodiment provides another terminal box, and each copper bar 2 in the three copper bar layers arranged inside the terminal box may also adopt the first part 16 and the second part 17 to form a complete copper bar.

Specifically, each copper bar 2 comprises a first portion 16 and a second portion 17, one end of the first portion 16 is connected with the box body 1 and used for being connected with a wiring terminal inside the motor, the other end of the first portion 16 is connected with one end of the second portion 17, the other end of the second portion 17 is connected with a power line outside the motor, and therefore the wiring terminal inside the motor and the power supply are connected through the first portion 16 and the second portion 17 of the copper bar 2, and the external power supply supplies power to the motor. For example, in the present embodiment, please refer to fig. 2, the copper bar portion extending in the z-axis direction of each copper bar 2 is a first portion 16 of the copper bar 2, the copper bar portion extending in the x-axis direction of each copper bar 2 is a second portion 17 of the copper bar 2, the second portions 17 of the three copper bar layers are arranged in three layers along the z-axis direction, the first portions 16 of the three copper bar layers are arranged in three layers along the x-axis direction, each copper bar layer includes a plurality of copper bars 2 with the same number, the first portions 17 of the copper bars 2 are arranged side by side along the y-axis direction, the second portions 16 of the copper bars 2 are arranged side by side along the y-axis direction, that is, the first portion 16 and the second portion 17 of each copper bar 2 are perpendicular to each other. Wherein, the first part 16 and the second part 17 can adopt a split structure or an integrated structure.

For example, in some alternative embodiments, the first portion 16 and the second portion 17 may be a split structure, and one end of the first portion 16 and one end of the second portion 17 may be detachably fixed together by a bolt, a screw, or the like. For another example, in the embodiment, referring to fig. 1, the first portion 16 and the second portion 17 may be an integral structure formed by bending a strip-shaped cylindrical rod by 90 degrees, or certainly, an integral structure with an included angle of 90 degrees may be formed by welding two elongated copper cylinders, so as to simplify the process and save the cost.

As shown in fig. 2, in this embodiment, each copper bar layer may have the same structure, and orthographic projections of the three copper bar layers in the same plane may be overlapped together; alternatively, the three copper bar layers may also be arranged in a staggered manner, for example, the three copper bar layers may be staggered along the length direction, i.e., the x-axis direction, or the width direction, i.e., the y-axis direction of the box body, that is, the orthographic projections of the three copper bar layers in the same plane are also staggered. For example, fig. 2 shows the second portion 17 of three copper bar layers stacked, but of course, in other embodiments, the second copper bar layer and the third copper bar layer along the z-axis direction may also be translated to the y-axis direction by a certain distance, so as to achieve the purpose of staggering the three copper tile layers.

As shown in fig. 2, a first portion 16 of each copper bar 2 is fixed on the box body 1 at an end close to the box body 1, and a second portion 17 of the copper bar 2 is fixed on the box body 1 by the first portion 16 and the bottom surface of the box body 1. Optionally, in order to strengthen the joint strength of the copper bar 2 in the box body 1 and the z-axis direction, the joint may be provided with a connecting plate in an L shape, one end of the connecting plate may be detachably fixed on the box body 1 by a screw or a bolt or other fasteners, the other end of the connecting plate may be fixed at one end of the copper bar 2 close to the box body 1 in the z-axis direction by welding, so as to realize the fixed connection of the copper bar 2 with the box body 1 in the z-axis direction. Of course, there are many other conceivable connection methods, and the present embodiment is not particularly limited thereto.

The terminal box that this embodiment provided, every copper bar 2 in three copper bar layers includes first portion 16 and second portion 17, the one end and the power of second portion 17 are connected, the other end of second portion 17 is fixed on box body 1 and is connected with the inside binding post of motor through first portion 16, and, first portion 16 and the second portion 17 of copper bar 2 are for can be for the integrative structure that the bending becomes, in order to improve the reliability that copper bar 2 and box body 1 are connected, will be used for arranging into the three-layer with a plurality of copper bars 2 of being connected with heterogeneous motor electricity divide into the array simultaneously, thereby can make full use of the space in the terminal box, and also can guarantee to have sufficient electric clearance and creepage distance between adjacent copper bar 2, in order to guarantee that the terminal box has sufficient security performance, also be convenient for install it in the narrower equipment in space simultaneously.

EXAMPLE III

Fig. 3 is a top view of a third junction box provided in the third embodiment. Fig. 4 is a front view of a third junction box according to the third embodiment. Fig. 5 and 6 are schematic structural diagrams of the junction box provided by the embodiment at different viewing angles. Fig. 7 is a schematic view of the first stopper provided in this embodiment. Fig. 8 is a schematic structural diagram of a second limiting block provided in this embodiment. Referring to fig. 3 to 8, on the basis of the above embodiments, the present embodiment provides an improved junction box.

Specifically, in this embodiment, referring to fig. 3 to 6, the box body 1 may be a square box structure formed by processing with a steel plate welding machine, and the copper bar 2 is an integral structure formed by bending a rectangular strip-shaped copper plate by 90 degrees.

In the present embodiment, three copper bar layers are arranged side by side in the height direction (z-axis direction in fig. 5) inside the junction box; each copper bar layer comprises a plurality of copper bars 2, and the plurality of copper bars 2 are arranged side by side along the y-axis direction of the box body; two adjacent copper bar layers are followed the crisscross setting of x axle direction to the one end parallel and level of every copper bar 2, the other end then along the crisscross setting of x axle direction, also promptly, the length of every copper bar 2 all is different, thereby makes the length of a plurality of copper bars of every layer all increase gradually along x axle direction.

Referring to fig. 3-6, each copper bar layer includes three copper bars 2 arranged side by side along the y-axis direction, wherein the second portions 17 of the three copper bars 2 in each copper bar layer extend to different lengths along the x-axis direction, and meanwhile, the second portions 17 of two adjacent copper bar layers in the copper bar layers arranged in three layers along the z-axis direction are staggered along the x-axis direction, that is, as shown in fig. 5, the second portions 17 in the three copper bar layers are arranged in a stepped manner along the z-axis direction, so that the second portions 17 of nine copper bars 2 in the three copper bar layers inside the junction box are used for connecting one end of a power line and are all distinguished along the x-axis direction, thereby avoiding lines confusion when too many motors are used for wiring, making the wiring more clear, and improving the wiring accuracy.

Further, the terminal box may further comprise a plurality of adapters, and the free end of the second portion 17 of the copper bar 2 may be connected to an external power source of the motor through the adapters. Generally speaking, the adapter is a conductor to realize the conduction of the copper bar 2 and the power supply. For example, the material of the adapter can be copper, so that the adapter has better conductivity. Of course, the adaptor may be made of other conductive materials, which are not described herein in detail.

Further, the adaptor also comprises a first adaptor 3 and a second adaptor 4. The first adapter 3 comprises a connecting plate and a mounting plate which are arranged in parallel, and a vertical plate positioned between the connecting plate and the mounting plate; the connecting plate and the mounting plate are respectively fixed with two ends of the vertical plate and are positioned on two opposite sides of the vertical plate; the mounting panel is used for fixing one end of the copper bar 2 with the bottom surface of the box body.

For example, in some alternative embodiments, one end of the connecting plate may be fixed to the bottom of the junction box by a fastener such as a screw, the other end of the connecting plate may be fixed to one end of the vertical plate by a fastener such as a bolt or a rivet, the other end of the vertical plate and one end of the mounting plate may also be fixedly connected, and the other end of the mounting plate and one end of the second portion 17 of the copper bar 2 are fixed. The mounting plate, the connecting plate and the vertical plate can also be of an integrally formed structure. For example, in the embodiment, referring to fig. 3 to 6, the mounting plate, the connecting plate, and the vertical plate may be formed by bending the strip-shaped plate twice to form an integral structure similar to a "z" shape as the first adaptor, so as to simplify the process and reduce the cost.

In addition, in the present embodiment, the vertical plates take the form of different lengths, and the first adapter 3 and the second portion 17 of the copper bar 2 of different heights are connected by using a plurality of first adapters 3 having vertical plates of different lengths. In this embodiment, the mounting panel and the copper bar 2 are detachably mounted together through fasteners such as bolts or screws, and the connecting plate is fixed on the bottom surface of the box body 1 through fasteners such as screws or studs, so that the adapter is convenient to detach and shift.

Further, the second adaptor 4 may be a plate-like or block-like structure of different shapes. For example, in the present embodiment, as shown in fig. 6, the second adaptor 4 may be a strip-shaped plate, one end of the strip-shaped plate is connected to the bottom surface of the box body 1, the other end of the strip-shaped plate is connected to the copper bar 2 through a fastener such as a screw or a bolt, and when the height of the copper bar 2 located at the bottom layer in the copper bar layer is lower, the rectangular plate is used to fix one end of the copper bar 2 on the box bottom.

Furthermore, the adaptor can be provided with a fixing plate 5 for installing a power line. For example, in some alternative embodiments, a through hole may be further formed in the fixing plate 5 for the power line to penetrate through to connect the power line and the copper bar 2. For example, in this embodiment, through the structure that forms a rectangle riser through mould pressing or the mode of moulding plastics integrated into one piece at one side of adaptor as fixed plate 5, seted up the through-hole on the rectangle riser to make things convenient for the connection of power cord, so, copper bar 2 passes through adaptor and switch-on.

Specifically, the junction of the adapter and the box body 1 can be further provided with an insulating block 6 for installing the adapter and the box body 1 together in an insulating mode, the requirement of insulating wiring inside the junction box is met, and short circuit of wiring inside the junction box is avoided. For example, in some alternative embodiments, the insulation block 6 may be a rectangular plate or a circular plate. For example, referring to fig. 6, the insulating block 6 is a rectangular plate-shaped structure, one surface of the rectangular plate is fixed on the bottom of the box, and the opposite surface of the rectangular plate is used for fixing the adaptor, for example, in this embodiment, the insulating block 6 may be fixed on the bottom of the box 1 by a connecting member such as a bolt or a stud, so that the adaptor is mounted on the box 1 in an insulating manner by the insulating block 6.

In addition, there may be a plurality of insulation blocks 6, and each adaptor corresponds to one insulation block 6, for example, referring to fig. 4 to 6, in this embodiment, three insulation blocks 6 are used, so that the adaptors are fixed on the three insulation blocks 6 in groups.

Further, one end of the first part 16 of the three layers of copper bars, which is close to the box body 1, is fixed on the box body 1. For example, in this embodiment, please continue to refer to fig. 4 and fig. 6, a plurality of conduction plates 7 are inserted on the box bottom of the junction box, one end of each conduction plate 7 is connected to one end of the first portion 16, the connection mode may be realized by using fasteners such as bolts as shown in fig. 2, and the other end of each conduction plate 7 is inserted into the box bottom and penetrates through the box bottom for being connected to the current collecting terminal inside the motor, so that one end of the three layers of copper bars inside the junction box is connected to the current collecting terminal inside the motor.

Further, the connection part of the conduction plate 7 and the box bottom of the junction box can comprise an insulating ring, for example, rubber or silica gel can be used as the insulating ring, so that the conduction plate 7 and the box body are fixed together in an insulating manner, and the design requirement of the junction box is ensured. Further, an insulating block 6 can be arranged between the first part 16 of the copper bar 2 and the box bottom, and the plurality of conduction plates 7 penetrate through the box bottom and are connected with the insulating block 6 and the first part 16 of the copper bar 2. Specifically, the upper surface of the box bottom of the junction box can be further provided with a thread block for penetrating of connecting pieces such as bolts and screws, so that other parts can be conveniently mounted on the box bottom of the junction box.

In the use process of the junction box, the power line is connected with the second part 17 of the copper bar 2 through the adapter, and the current collecting terminal inside the motor is connected with the first part 16 of the copper bar 2 through the conduction plate 7, so that the external power supply supplies power to the motor to provide required power for the rotation of the motor.

Further, can set up first stopper 8 between two adjacent copper bars 2 in every copper bar layer, for example, first stopper 8 can adopt the structure of rectangular block shape or hemisphere shape, set up on first stopper 8 towards the copper bar and with the recess that 2 shapes of copper bar match, through establishing the copper bar card in this recess, first stopper 8 goes up simultaneously through setting up the mounting hole and fix first stopper 8 on the box body 1 of terminal box with penetrating of fasteners such as screw or double-screw bolt, with this, set up first stopper 8 between two adjacent longer copper bars 2 through in every copper bar layer, longer copper bar 2 has been avoided because the shake has reduced the safe electric clearance between two adjacent copper bars 2 at motor moving in-process, avoid taking place the electric breakdown and cause the short circuit.

Specifically, in this embodiment, please refer to fig. 7, first stopper 8 has adopted the rectangular block, through set up two rectangular channels down on the rectangular block, range upon range of on three-layer copper bar 2 through three the same rectangular block that takes the recess, set up the mounting hole simultaneously in the intermediate position of rectangular block for penetrating of fasteners 20 such as screw or double-screw bolt fixes the rectangular stopper on the box bottom of terminal box, 8 range upon range of settings of three first stopper, thus, make and all realized the position between every two adjacent longer copper bars 2 in the three copper bar layer and injectd, the change of the safe electric clearance between each longer copper bar 2 of having avoided the motor to lead to because the vibrations of the motor in-process of using, make the positional relationship of each copper bar 2 in the copper bar layer more reliable. It is easy to understand that the shape and the number of the slots on the first limiting block 8 can be adaptively adjusted according to the shape and the number of the plurality of copper bars 2 in each copper bar layer.

Further, can also set up second stopper 9 between two adjacent copper bar layers in the three copper bar layer, for example, second stopper 9 can adopt the massive or hemisphere shape structure of rectangle, offers on the second stopper 9 towards the copper bar and with the 2 shape matching's of copper bar recess to 2 cards of copper bar are established in this recess, and fasteners such as screw or double-screw bolt are passed through to the one end of second stopper 9 simultaneously and are fixed on the box body 1 of terminal box.

Specifically, the second limiting block 9 has adopted the rectangular block, and the rectangular channel towards the copper bar 2 is seted up through the bottom surface at the rectangular block, for example, in this embodiment, please refer to fig. 8, three rectangular blocks that have the rectangular channel are vertically arranged, and the rectangular block card is established in three-layer copper bar 2, penetrates fasteners 20 such as screws or double-screw bolts at the side end (like the right-hand member of fig. 8) of rectangular block simultaneously and fixes the rectangular limiting block on the bottom of the box of terminal box. So for all realized the position between two adjacent copper bar 2 in the vertical direction in the three copper bar layer and injectd, avoided the motor in the in-process that uses because the vibrations of motor and the change in the safe electric clearance between each longer copper bar 2 that leads to, make the position relation of copper bar 2 more reliable, also reduced the noise that vibrations brought simultaneously.

Furthermore, the side wall of the box body 1 of the junction box can be provided with a through hole 10, and a power supply cable penetrates into the box body 1. For example, the number of the through holes 10 may be the same as the number of the phases of the motor, so that each phase of the motor corresponds to one power cable, and thus, the wiring layout is neat and the wiring is convenient.

Specifically, in the present embodiment, referring to fig. 6, the number of the through holes 10 is nine, and each through hole 10 corresponds to one adapter along the y-axis direction, so that a plurality of power cables penetrate into the junction box along the y-axis direction in parallel, the connection paths are orderly, adjacent cables do not affect each other, and convenience of the connection operation is improved.

Specifically, can also set up the glan joint 11 on a plurality of connect the through-hole 10, to playing the tight fixed effect of clamp, can effectually prevent that combustible gas, moisture or debris from entering into the terminal box head the inside, also can effectually prevent that the friction between cable conductor and the box body trompil from causing the cable rubber skin damaged, cause the accident to the cable conductor that penetrates.

Specifically, the inside massive or platy ground copper bar 12 that can also be provided with of terminal box, in order to satisfy the ground connection demand of the inside cable of terminal box, as shown in fig. 3, in this embodiment, can adopt rectangle sheet structure as ground copper bar 12, the both ends of ground copper bar 12 can be fixed on the bottom surface of terminal box through fasteners such as bolts, and simultaneously, can also set up a plurality of apertures on the ground copper bar 12, connect on ground copper bar 12 with the shield layer on the power supply cable with the cable, the one end of the pencil of power supply cable shield layer can set up the couple, the couple is directly hung and is established in the aperture of ground copper bar 12, realize the quick ground connection of user's cable shield layer.

Further, the outside of the junction box can be provided with a grounding block 13, as shown in fig. 3, a side wall of the junction box is provided with a protrusion as the grounding block 13, and the grounding block 13 is arranged outside the box body of the junction box, so that the overall grounding of the junction box is realized, and the use safety of the junction box is ensured.

In this embodiment, the junction box may further have a rack fixing hole 14 for the insertion of a connector to fix the junction box on the rack of the motor, as shown in fig. 3, the rack fixing holes 14 may be arranged in two rows, and in this embodiment, no special limitation is made on the number and position of the rack fixing holes 14, and the number and position of the rack fixing holes may be determined according to the specific installation condition of the junction box. In addition, a sealing ring can be laid between the junction box and the rack, for example, the sealing ring can be made of silica gel or rubber, and under the action of the sealing ring, pollutants are prevented from entering the junction box from the rack fixing hole 14 at the bottom of the junction box, so that the protection grade of the junction box is improved.

Further, the junction box may further include a cover plate, and the box body 1 and the cover plate are also fastened and connected by a plurality of fasteners. Specifically, for example, in this embodiment, as shown in fig. 3, a cover plate mounting hole 15 may be formed at the top end of the side wall of the box body, and meanwhile, a corresponding mounting hole is formed in the cover plate, so that a fastener such as a bolt or a stud can be inserted into the corresponding mounting hole to fix the cover plate on the side wall of the box body 1. Specifically, in this embodiment, the drift diameter of the cover plate mounting hole 15 can be as small as possible, the fastener adopts a thin screw which is adaptive to the size of the mounting hole, and the fastener is uniformly mounted on the side wall of the box body 1, so that the mounting strength between the box body 1 and the cover plate is ensured, and the protection grade of the junction box is further improved. Specifically, the turn-ups towards 1 direction of box body can also be equipped with around the apron, so, improved the rain proofness ability of terminal box, further improved the protection level of terminal box.

Specifically, can also set up the sealing washer between terminal box lateral wall and the apron, the sealing performance of further improvement terminal box, for example, the sealing washer can adopt silica gel or rubber preparation to form, under the effect of sealing washer, even the terminal box is in under the adverse circumstances, also can avoid the invasion of rainwater and granule for the terminal box shell satisfies better waterproof dustproof grade requirement.

According to the junction box provided by the embodiment, two adjacent copper bar layers are arranged in a step shape along the z-axis direction, and meanwhile, the lengths of the plurality of copper bars 2 in each copper bar layer are arranged in a staggered mode along the x-axis direction, so that the lengths of the plurality of copper bars in the junction box are different, circuit confusion during wiring when the number of phases of a motor is too large is avoided, wiring is more bright, the wiring accuracy is improved, meanwhile, a good safe electric gap and creepage distance can be obtained, and wiring can be facilitated while space is saved; the first limiting block 8 and the second limiting block 9 are arranged between the copper bars 2, so that the phenomenon that when the length of the copper bars 2 is too long, gaps between adjacent copper bars 2 are changed due to vibration in the operation process of a motor is avoided, and meanwhile, noise caused by vibration is reduced; the free end of the copper bar 2 is communicated with the free end of the copper bar 2 through the adapter, so that power is supplied to the motor, and the wiring operation of a user is facilitated; the plurality of insulating blocks 6 are arranged on the box body, so that the elements connected with the box body 1 in the junction box are insulated and fixed, and the design requirement of the junction box is met; the grounding copper bar 12 is arranged in the junction box, and the grounding block 13 is arranged outside the junction box, so that the junction box is ensured not to leak electricity in the using process, and the safety level of the junction box is improved; the elastic sealing ring is arranged at the joint of the cover plate and the box body 1, so that the protection grade of the junction box is improved, and the requirement of normal use of the junction box in a severe environment is met.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A junction box is used for connecting a multiphase motor with a power supply and is characterized by comprising a box body;

2. The junction box of claim 1, wherein adjacent two copper bar layers are staggered along the second direction.

3. The junction box of claim 1, wherein a length of the plurality of copper bars in each layer of copper bars increases along the second direction.

4. The junction box according to any one of claims 1 to 3, wherein a first limiting block is arranged between two adjacent copper bars.

5. The junction box according to any one of claims 1 to 3, wherein a second limiting block is arranged between two adjacent copper bar layers.

6. The junction box according to any one of claims 1 to 3, further comprising: the cover plate is fixed on the three copper bar layers in the box body, the cover plate covers the box body, and a sealing ring is arranged between the box body and the cover plate.

7. The junction box of claim 6, wherein the box body and cover plate are further securely connected by a plurality of fasteners.

8. The junction box of claim 7, wherein a plurality of said fasteners are uniformly disposed at a top end of a sidewall of said box body.

9. The connector of claim 1, further comprising a plurality of adapters, wherein each of said copper bars is connected to said power source through one of said adapters.

10. The junction box of claim 9, wherein the adapter includes a first adapter and a second adapter;

the first adapter comprises a connecting plate and a mounting plate which are arranged in parallel, and a vertical plate positioned between the connecting plate and the mounting plate;