CN216490057U

CN216490057U - Motor junction box

Info

Publication number: CN216490057U
Application number: CN202122941577.0U
Authority: CN
Inventors: 王松
Original assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Current assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-05-10
Anticipated expiration: 2031-11-26

Abstract

The utility model provides a motor junction box which comprises a box body, a junction box assembly, a wiring board and a connecting sheet, wherein the box body is provided with a wire inlet and a wire outlet, the junction box assembly is arranged in the box body and is provided with a plurality of wiring units, wiring ends are arranged on the wiring units, the wiring board is arranged at the wire inlet and is provided with an extending end which penetrates out of the box body from the wire inlet, a wiring part used for connecting a stator is arranged on the extending end, the connecting sheet is provided with a lead end and a wire outlet end connected with the lead end, the lead end is connected to the wiring part, and the wire outlet end is connected with the wiring ends and is led out from the wire outlet. The motor junction box can lead out three phase lines of the stator winding reliably so as to facilitate the connection of external cables and improve the use safety and reliability.

Description

Motor junction box

Technical Field

The utility model relates to the technical field of new energy automobile motors, in particular to a motor junction box.

Background

In the field of new energy automobiles, a driving motor generally adopts a motor junction box to connect a stator winding inside the motor with an external three-phase cable, and the three-phase cable transmits required electric energy for normal operation of the motor. The motor junction box mainly has the advantages that the reliable and firm connection between the outgoing line of the stator winding and an external three-phase cable is guaranteed, meanwhile, the function of insulation protection is achieved by enough electric clearance and creepage distance inside the motor junction box, and the normal and safe operation of the motor is guaranteed.

Along with the continuous improvement of the requirements of the power and the voltage of the motor, a power cable with a larger square is required to be adopted, the electric clearance and the creepage distance between the exposed part of the terminal and the junction box are also required to be increased, the structural design of the junction box of the current three-phase motor is unreasonable, the use requirement cannot be met, and the junction box of the motor can only meet the requirements of a low-power motor and is not suitable for a high-power motor.

In order to increase the electric clearance and the creepage distance, in the prior art, some motors adopt a method of increasing the size of a junction box, but not only can increase the material loss, but also can influence the installation of a driving motor on a vehicle, so that the height of the floor of the whole vehicle is increased. Some motors adopt a method of increasing bosses through optimization of a wiring board, so that only creepage distance is increased, electric clearance is not improved, and certain safety risk exists in the condition that the size of a connecting sheet cannot be adjusted.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a motor junction box, so as to reliably lead out three phase lines of a stator and improve the safety and reliability of use.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a motor junction box comprising a box body, a junction box assembly, a junction plate and a connecting sheet, wherein:

the box body is provided with a wire inlet and a wire outlet;

the wire holder assembly is arranged in the box body and is provided with a plurality of wire connection units, and each wire connection unit is provided with a wire connection end;

the wiring board is arranged at the wire inlet and is provided with an extending end which penetrates out of the box body from the wire inlet, and the extending end is provided with a wiring part for connecting a stator;

the connecting piece has the lead wire end to and with the leading wire end is connected the leading wire end, the lead wire end is connected on the wiring portion, the lead wire end with the wiring end links to each other, and by the outlet is drawn forth.

Furthermore, the wiring unit comprises a wiring seat arranged in the box body.

Further, each of the wire holders is detachably disposed on the box body.

Furthermore, the box body is provided with an installation lug; each wire holder is fixedly connected to the mounting lug through a threaded connection structure.

Further, the wiring board has two connection terminals provided across the wire inlet; the two connecting ends are erected on the box body, and one of the connecting ends is connected to the box body in an insulating mode.

Further, an insulating plate is arranged between the wiring board and the box body; one of the connecting ends is connected with the box body through the insulating plate, and the connecting end connected with the box body in an insulating mode is close to the wiring portion.

Furthermore, a groove is formed in the extending end; the wiring portion includes a nut embedded in the groove.

Further, the box body comprises a lower shell and a cover plate which are connected together; the wire inlet and the wire holder assembly are arranged at the bottom of the lower shell; the outlet is arranged on the side part of the lower shell.

Further, a side plate of the lower shell is provided with a mounting hole; and a cable waterproof joint is arranged in the mounting hole, and the wire outlet is positioned on the cable waterproof joint.

Further, the connecting pieces comprise a U-phase connecting piece, a V-phase connecting piece and a W-phase connecting piece; the U-phase connecting sheet and the W-phase connecting sheet are both provided with first vertical plates, and the V-phase connecting sheet is provided with a second vertical plate and a bending plate which is bent relative to the second vertical plate along a transverse plate which is bent relative to the first vertical plate, and the bending plate is step-shaped; the lead end is located the first riser with on the second riser, the leading-out terminal is located the diaphragm with bend on the board.

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

according to the motor junction box, the three-phase line of the stator winding can be reliably led out through the connecting sheet, the junction box assembly and the wiring board, so that the connection of an external cable is facilitated, and the use safety and reliability can be improved.

In addition, the wire holder detachable of setting is connected on the box body, is favorable to the installation and the change of wire holder, and the installation effect of wire holder on the box body can be improved to the installation boss that sets up on the box body. The wiring board is overlapped on the box body through two connecting ends, so that the installation of the wiring board is facilitated, and meanwhile, one connecting end is arranged to be connected with the box body in an insulation mode, so that the wiring board is connected with the box body in an insulation mode, and the use safety of the motor wiring box can be guaranteed.

In addition, stretch outward and serve and set up the recess to inlay the nut in the recess, so make the connection piece can the spiro union on the wiring board, and do benefit to the connection piece and be connected with the electricity of wiring board, and do benefit to and improve the reliability of electricity connection, the recess that sets up simultaneously makes the connection piece can the interval set up, and can increase creepage distance. The cable waterproof connector is arranged on the box body, so that the wire outlet end on the connecting piece is led out from the cable waterproof connector, the external three-phase power cable is convenient to fix, and the protection effect can be achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a motor junction box according to an embodiment of the utility model;

fig. 2 is a sectional view of a motor junction box according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the motor junction box according to the embodiment of the present invention without a cover;

FIG. 4 is a structural diagram of another view angle of the motor junction box according to the embodiment of the present invention, wherein the cover is not installed;

FIG. 5 is a schematic structural diagram of a lower housing according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a patch panel according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of an insulating plate according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a wire holder according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a U-phase connecting plate according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a V-phase connecting piece according to an embodiment of the utility model;

FIG. 11 is a schematic structural diagram of a W-phase connecting sheet according to an embodiment of the present invention;

description of reference numerals:

1. a box body; 101. a lower housing; 1011. a wire inlet; 1013. mounting a bump; 1014. mounting holes; 1016. a fixing hole; 102. a cover plate; 103. a seal member; 2. a wiring board; 201. an overhanging end; 2011. a groove; 2012. a nut; 202. a connecting end; 3. connecting sheets; 31. connecting a U-phase sheet; 32. a V-phase connecting sheet; 33. a W-phase connecting sheet; 311. a transverse plate; 312. a first vertical plate; 321. bending the plate; 322. a second vertical plate; 4. an insulating plate; 401. a first plate body; 402. a second plate body; 5. a cable water joint; 6. a wire holder; 601. a terminal; 602. mounting grooves; 603. connecting holes; 10. a lead terminal; 20. and (7) leading out the wire end.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same order, but are to be construed as referring to the same order.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection may be fixed, detachable, or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a motor junction box which mainly comprises a box body 1, a junction box assembly, a wiring board 2 and a connecting sheet 3.

Wherein, the box body 1 is provided with a wire inlet 1011 and a wire outlet. The wire holder assembly is disposed in the box body 1 and has a plurality of wire connection units, each of which is provided with a wire connection terminal 601. The wiring board 2 is disposed at the wire inlet 1011 and has an extended end 201 extending out of the box body 1 from the wire inlet 1011, and the extended end 201 is provided with a wiring portion for connecting the stator. The connecting piece 3 has a lead terminal 10 and a lead terminal 20 connected to the lead terminal 10, the lead terminal 10 is connected to the connecting portion, and the lead terminal 20 is connected to the terminal 601 and led out from the lead outlet.

Through as above structure for three phase lines on the stator are drawn forth through the connection piece 3 of setting in box body 1 and the outlet that sets up on box body 1, with better connection reliability, and do benefit to the safety in utilization that improves motor terminal box.

Specifically, an exemplary structure of the motor junction box of the present embodiment is shown in fig. 1 to 4, and at this time, as mentioned in the foregoing, the motor junction box includes a box body 1, a junction block assembly, a junction block 2, and a connection piece 3. The motor junction box of the embodiment can convert three-phase outgoing lines of the stator winding into six-phase lines to be connected with an external power cable. It can be understood that, through the design concept described above, the motor junction box can also convert the three-phase outgoing lines of the stator winding into other numbers of connection ports for leading out.

In detail, the structure of the box body 1 of the present embodiment is shown in fig. 5, and in combination with fig. 1 to 4, the box body 1 has a wire inlet 1011 and a wire outlet, and the above-mentioned wire connector assembly is disposed in the box body 1. Specifically, the cartridge 1 of the present embodiment specifically includes a lower housing 101 and a cover plate 102 connected together, and in order to improve the sealing performance of the cartridge 1, a sealing member 103 is disposed between the lower housing 101 and the cover plate 102. The wire inlet 1011 and the wire holder assembly are specifically disposed on the bottom plate of the lower housing 101, and the wire outlet is disposed on the sidewall of the lower housing 101.

The connection piece 3 of the present embodiment includes three connection pieces, i.e., a U-phase connection piece 31, a V-phase connection piece 32, and a W-phase connection piece 33, and the connector assembly of the present embodiment has a plurality of connection units, each of which is provided with a plurality of terminals 601 insulated and separated from each other. Specifically, the wiring unit of this embodiment includes three wire holders 6 disposed at intervals in the box body 1, and two terminals 601 are respectively disposed on each wire holder 6. The outlet terminals 20 of the U-phase connecting piece 31, the V-phase connecting piece 32 and the W-phase connecting piece 33 are connected to the terminals 601 in a one-to-one correspondence.

In order to facilitate the fixed installation and replacement of the wire holder 6 in the box body 1, each wire holder 6 of the embodiment is detachably and fixedly connected to the box body 1. As shown in fig. 3 to 5 in combination with fig. 8, a plurality of mounting protrusions 1013 are provided at intervals on the side wall of the box body 1, that is, the lower casing 101, and each connecting seat is fixedly connected to the mounting protrusions 1013 by a screw structure. In order to further improve the positioning effect of the wire holder 6, a mounting groove 602 is formed on the wire holder 6, and a connecting hole 603 is formed on the mounting groove 602.

At this time, the wire holder 6 is fixed to the lower case 101 by fitting the fitting projection 1013 into the fitting groove 602 and fixing by bolting through holes formed in the wire holder 6 and the fitting projection 1013.

The wiring board 2 of the present embodiment is specifically disposed at the wire inlet 1011, and has an extending end 201 extending out of the box body 1 from the wire inlet 1011, and the extending end 201 is provided with a wiring portion for connecting three phase wires of the stator winding. Specifically, the structure of the wiring board 2 is as shown in fig. 6, and with reference to fig. 2 and 3, it has two connection terminals 202 disposed across the wire inlet 1011, the two connection terminals 202 are set up on the box body 1, and one of the connection terminals 202 is connected to the box body 1 in an insulated manner, so that the wiring board 2 is insulated from the box body 1.

With continued reference to fig. 2, 3 and 6, an insulating plate 4 is provided between the terminal block 2 and the case body 1, one of the two connection terminals 202 is connected to the case body 1 through the insulating plate 4, and the connection terminal 202 insulated from the case body 1 is adjacent to the terminal portion.

The insulating plate 4 of the present embodiment has an L-shaped structure in its overall structure. As shown in fig. 7, the insulating plate 4 includes a first plate body 401, and a second plate body 402 bent toward one side of the first plate body 401 along an end of the first plate body 401, and a fixing hole 1016 is formed on the second plate body 402, correspondingly, fixing holes 1016 are also formed on the lower case 101 and the wiring board 2 of the embodiment, and one end of the wiring board 2 is overlapped on the insulating plate 4 and fixed on the lower case 101 by a connecting member, such as a bolt, penetrating through the fixing hole 1016.

In addition, be equipped with three recess 2011 of interval arrangement on the overhanging end 201 of wiring board 2, wiring portion is including inlaying nut 2012 in recess 2011, and preferred, nut 2012 adopts the structure of round nut 2012, the setting of this structure for connection piece 3 can the spiro union on wiring board 2, and do benefit to the electric connection of connection piece 3 with wiring board 2, and can improve the reliability of electric connection, the recess 2011 that sets up simultaneously, make the connection piece 3 that links to each other can set up at interval each other, so can increase creepage distance.

The connecting piece 3 of the present embodiment includes the U-phase connecting piece 31, the V-phase connecting piece 32, and the W-phase connecting piece 33, as described above. As shown in fig. 9 to 11, the U-phase connecting piece 31 and the W-phase connecting piece 33 are L-shaped in overall structure, and each of the U-phase connecting piece 31 and the W-phase connecting piece 33 has a first vertical plate 312 and a transverse plate 311 disposed along a bend with respect to the first vertical plate 312. The V-phase connecting piece 32 has a second vertical plate 322 and a bending plate 321 bent relative to the second vertical plate 322, and the bending plate 321 is step-shaped. The lead terminals 10 are provided on the first vertical plate 312 and the second vertical plate 322, and the lead terminals 20 are provided on the horizontal plate 311 and the bending plate 321.

As a further modification of this embodiment, a mounting hole 1014 is provided in a side plate of the lower case 101, a cable waterproof connector 5 is provided in the mounting hole 1014, and the outlet is located in the cable waterproof connector 5. In this embodiment, two outlet terminals 20 are respectively disposed on the U-phase connecting piece 31, the V-phase connecting piece 32 and the W-phase connecting piece 33, and at this time, the corresponding waterproof cable joints 5 are also divided into three groups corresponding to the U-phase connecting piece 31, the V-phase connecting piece 32 and the W-phase connecting piece 33, so that the three phase lines of the stator at the inlet 1011 are converted into six phase lines via the U-phase connecting piece 31, the V-phase connecting piece 32 and the W-phase connecting piece 33 to be led out.

It should be noted that the installation hole 1014 of the present embodiment is preferably in the form of a threaded hole, and the waterproof cable joint 5 is preferably a waterproof joint having an electromagnetic compatibility function, so that the screwing of the waterproof cable joint 5 into the installation hole 1014 can be facilitated, and the safety in use can be improved.

It should be noted that the wire outgoing end 20 of the U-phase connecting piece 31, the V-phase connecting piece 32 and the W-phase connecting piece 33 of the present embodiment and the corresponding cable waterproof connector 5 can be connected by a wire harness, so as to facilitate the circuit conduction between the connecting piece 3 and the cable waterproof connector 5.

The motor terminal box of this embodiment through the wire holder 6 and wiring board 2 and the connection piece 3 that set up, can make stator winding's three-phase line turn into six phase lines and external cable connection, and can increase electric clearance and creepage distance to can solve high-power motor's insulating safety protection problem, and have better result of use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a motor terminal box which characterized in that, includes box body (1), terminal block subassembly, wiring board (2) and connection piece (3), wherein:

the box body (1) is provided with a wire inlet (1011) and a wire outlet;

the wire connecting seat assembly is arranged in the box body (1) and is provided with a plurality of wire connecting units, and each wire connecting unit is provided with a wire connecting end (601);

the wiring board (2) is arranged at the wire inlet (1011) and is provided with an extending end (201) which penetrates out of the box body (1) from the wire inlet (1011), and a wiring part for connecting a stator is arranged on the extending end (201);

the connecting piece (3) is provided with a lead terminal (10) and a wire outlet terminal (20) connected with the lead terminal (10), the lead terminal (10) is connected to the wiring portion, and the wire outlet terminal (20) is connected with the wiring terminal (601) and led out from the wire outlet.

2. The motor junction box of claim 1, wherein:

the wiring unit comprises a wiring seat (6) arranged in the box body (1).

3. The motor junction box of claim 2, wherein:

each wire holder (6) is detachably arranged on the box body (1).

4. The motor junction box of claim 3, wherein:

the box body (1) is provided with an installation lug boss (1013);

each wire holder (6) is fixedly connected to the mounting lug (1013) through a threaded connection structure.

5. The motor junction box of claim 1, wherein:

the wiring board (2) has two connection ends (202) arranged across the wire inlet (1011);

the two connecting ends (202) are erected on the box body (1), and one of the connecting ends (202) is connected to the box body (1) in an insulating mode.

6. The motor junction box of claim 5, wherein:

an insulating plate (4) is arranged between the wiring board (2) and the box body (1);

one of the connecting ends (202) is connected with the box body (1) through the insulating plate (4), and the connecting ends (202) which are connected with the box body (1) in an insulating mode are arranged close to the wiring portion.

7. The motor junction box of claim 1, wherein:

a groove (2011) is arranged on the outward extending end (201);

the wire connecting portion comprises a nut (2012) embedded in the groove (2011).

8. The motor junction box according to any one of claims 1 to 7, wherein:

the box body (1) comprises a lower shell (101) and a cover plate (102) which are connected together;

the wire inlet (1011) is formed in the bottom of the lower shell (101);

the outlet is arranged on the side part of the lower shell (101).

9. The motor junction box of claim 8, wherein:

a mounting hole (1014) is formed in a side plate of the lower shell (101);

and a cable waterproof joint (5) is arranged in the mounting hole (1014), and the outlet is positioned on the cable waterproof joint (5).

10. The motor junction box of claim 8, wherein:

the connecting piece (3) comprises a U-phase connecting piece (31), a V-phase connecting piece (32) and a W-phase connecting piece (33);

the U-phase connecting piece (31) and the W-phase connecting piece (33) are both provided with a first vertical plate (312), the V-phase connecting piece (32) is provided with a second vertical plate (322) and a bending plate (321) which is bent relative to the second vertical plate (322) along a transverse plate (311) which is bent relative to the first vertical plate (312), and the bending plate (321) is step-shaped;

the lead terminal (10) is arranged on the first vertical plate (312) and the second vertical plate (322), and the wire outlet terminal (20) is arranged on the transverse plate (311) and the bending plate (321).