CN113572103A

CN113572103A - Terminal box

Info

Publication number: CN113572103A
Application number: CN202110760578.7A
Authority: CN
Inventors: 李鑫; 常九健; 储亚峰
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2021-10-29
Anticipated expiration: 2041-07-06
Also published as: CN113572103B

Abstract

The invention aims to provide a safe and reliable junction box suitable for a strong voltage sheet wiring mode, which comprises a box body and an upper cover, wherein a through hole for a cable to enter is formed in the box body, a plurality of wiring terminals are arranged in the box body and connected with a pressing sheet terminal at the end part of the cable, and an insulating partition plate is arranged in an inner cavity of the box body between adjacent wiring terminals. In the scheme, the adjacent wiring terminals are separated by the insulating partition plate, so that the effect of isolating the adjacent cables is achieved, the resistivity between the adjacent cables can be increased, the high-voltage breakdown risk is reduced, and the requirement of strong current input of the hub motor driving system is met.

Description

Terminal box

Technical Field

The invention relates to the technical field of junction boxes, in particular to a junction box suitable for a wafer wiring mode.

Background

The hub motor is one of the hot spots of research in the field of new energy automobiles in recent years, and for a distributed drive automobile, each hub motor is independently installed in each hub, so that the function of respectively controlling four wheels can be realized. The control signal of the hub motor comes from a running computer, namely an electronic control unit ECU, and the motor outgoing line needs to be connected with the ECU outgoing line. The general working voltage of the hub motor is about 350-400V, the hub motor is close to the ground due to being installed in a hub, a water accumulation environment is inevitably faced, the hub motor driven new energy automobile is industrialized in the future, the safety of the whole automobile is inevitably required to be considered comprehensively, and the reliable insulation and sealing requirements can be met, so that the development of the hub motor driven new energy automobile is a necessary way.

At present, the inlet and outlet cables of a junction box commonly used in an electrical system are connected with a Glan head, so that a good waterproof function can be realized, however, the junction box structure is commonly used for low-voltage cable connection, and the electromagnetic interference between the cables can be ignored or has no strict requirement, so that the cables are fixed in the junction box by adopting a screw line pressing mode, the space between the cables can be saved, and the volume of the junction box is further reduced; and since such a junction box structure is often used for weak current, it is not sufficiently considered in view of safety. However, the hub motor driving system adopts strong current input, needs to be fully considered in terms of safety, is not suitable for a strong current circuit in a wiring mode of pressing a wire through a screw, replaces a pressing sheet terminal, is made of copper materials, has better conductivity, and needs to meet certain pressing force during wiring so as to ensure that a sufficient contact area between the two pressing sheet terminals meets the requirement of the conductivity. Therefore, the junction box in the prior art cannot be used in the wiring of the in-wheel motor.

Disclosure of Invention

The invention aims to provide a safe and reliable junction box suitable for a strong voltage sheet wiring mode.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a junction box, includes box body and upper cover, sets up the via hole that supplies the cable to enter on the box body, is provided with a plurality of binding post in the box body, and binding post is connected with the preforming terminal of cable tip, is provided with insulating barrier in the box body inner chamber between the binding post that faces mutually.

In the scheme, the adjacent wiring terminals are separated by the insulating partition plate, so that the effect of isolating the adjacent cables is achieved, the resistivity between the adjacent cables can be increased, the high-voltage breakdown risk is reduced, and the requirement of strong current input of the hub motor driving system is met.

Drawings

FIG. 1 is an external view of a junction box;

FIG. 2 is a cross-sectional view of the junction box;

fig. 3 is a perspective view of the cartridge body.

Detailed Description

As shown in fig. 1 to 3, a junction box includes a box body 10 and an upper cover 20, a via hole 11 for a cable 30 to enter is opened on the box body 10, a plurality of connection terminals 40 are provided in the box body 10, the connection terminals 40 are connected with a wafer terminal 31 at the end of the cable 30, and an insulating partition 50 is provided in an inner cavity of the box body 10 between adjacent connection terminals 40. The adjacent wiring terminals 40 are separated by the insulating partition plate 50, so that the function of separating adjacent cables is achieved, the resistivity between the adjacent cables 30 can be increased, the high-voltage breakdown risk is reduced, and the requirement of strong current input of the hub motor driving system is met.

When the upper cover 20 is moved away, the proximity switch 60 feeds back a signal, and the strong current is cut off, but the main circuit has electrical components such as inductance and capacitance, and the cable voltage will fade, the four corners of the box body 10 are provided with the upright posts 12, the height of the upright posts 12 is the same as that of the insulating partition plate 50 and is higher than the upper hole edge of the through holes 11, the upper end face of the upright posts 12 is provided with threaded holes 121, the cover plate 13 is arranged on the upper end face of the upright posts 12 and is fixedly connected with the upright posts 12 through bolts, and the cover plate 13 and the upper cover 20 are arranged at intervals. In order to avoid the operator to touch the pressing sheet terminal 31 at the moment, the structure of the cover plate 13 is added, so that the operator can be prevented from touching the pressing sheet terminal 31, the cable voltage can be completely removed in the process of detaching the cover plate 13, and one more barrier for protecting the operator is provided.

In order to fix the tablet terminals 31, a boss 41 is arranged in the box body 10, a plurality of mounting holes 411 are arranged on the boss 41 at intervals along the length direction of the boss, nuts 42 are arranged in the mounting holes 411, and the tablet terminals 31 are stacked on the nuts 42 and pressed on the nuts 42 through threaded fasteners 43, so that sufficient contact area among the tablet terminals 31 is ensured, and good conductivity is realized.

The tablet terminal 31 needs to satisfy a certain tightening torque when connected through the threaded fastener 43, in order to avoid the damage of the tightening torque to the box body 10, the nut 42 is welded on the lower plate surface of the connecting flange 44, the outer contour of the connecting flange 44 is larger than the aperture of the mounting hole 411, the boss 41 on the periphery of the mounting hole 411 is provided with a connecting hole 412, the connecting flange 44 and the boss 41 are fixedly connected through a bolt, and the tablet terminal 31 is pressed tightly on the connecting flange 44 through the threaded fastener 43. The wafer terminal 31 is mounted on the connecting flange 44 according to a predetermined tightening torque, and the connecting flange 44 is fixed on the case body 10 (the boss 41 is a part of the case body 10) in a normal connection manner, so that the case body 10 is mechanically protected, and when the connecting flange 44 is worn, only the connecting flange 44 needs to be replaced.

One side of box body 10 is provided with mounting groove 14 to the protruding stretching of outside, and mounting groove 14's notch just along the parallel and level with the box body 10 suitable for reading up, and through-hole 141 has been seted up to mounting groove 14's tank bottom, and proximity switch 60 passes through-hole 141 from the outside and gets into in mounting groove 14 and with mounting groove 14 fixed connection, and proximity switch 60's inductive head and upper cover 20 interval formula are arranged. The proximity switch 60 is fixedly connected with the box body 10, when the upper cover 20 is removed, the proximity switch 60 can give a feedback signal, the strong current is cut off, and the safety of an operator is ensured. The proximity switch 60 can be a mature product, and a capacitance type proximity switch is selected, so that the distance from a proximity switch probe to the upper cover 20 is required to be within the detection effective travel range of the proximity switch 60 during installation.

The tank bottom of mounting groove 14 and apron 13 parallel and level are arranged, therefore set up corresponding structure on the upper cover 20, cover mounting groove 14 suitable for reading in the lump, and proximity switch 60 and through-hole 141 are sealed to be cooperated, prevent into water, produce the potential safety hazard.

The upper opening edge of the box body 10 is provided with a connecting lug a, the outer edge of the upper cover 20 is also provided with a connecting lug a, and a bolt penetrates through the box body 10 and the connecting lug a on the upper cover 20 to fixedly connect the box body 10 and the upper cover, so that the installation and the disassembly are convenient; the lower plate surface of the upper cover 20 is provided with a convex ring 21 which protrudes downwards, the convex ring 21 abuts against the inner wall of the box body 10 to form a spigot fit, and a sealing ring 70 is further arranged between the upper cover 20 and the upper end surface of the box body 10 to play a sealing role.

The periphery cover of cable 30 is equipped with glan head 32, and glan head 32 is fixed on box body 10 and sealing connection between glan head 32 and the via hole 11, and glan head 32 installs on box body 10, and cable 30 passes glan head 32 and can screw up glan head nut and realize sealed function.

The box body 10 is made of insulating materials or metal materials with no surface sprayed with insulating coatings, the upper cover 20 is made of metal materials, and the cover plate 13, the gland head 32 and the connecting flange 44 are made of light insulating materials.

The invention is suitable for the high-voltage cable pressing sheet wiring mode with the voltage below 400V; the terminal connecting flange 44 can ensure the tightening torque of the threaded fastener 43 between the wafer terminals 31; the proximity switch 60 can ensure that an operator feeds back a signal when the junction box is disassembled, so that strong current is cut off, and personal safety is ensured; the cover plate 13 forms secondary insulation, so that the damage to a human body caused by voltage delay fading is avoided; the gland head 32 and the sealing ring 70 ensure the sealing of the junction box. The invention fully considers the use safety of the junction box, has simple structure, is easy to process and produce and is convenient to popularize and use.

Claims

1. The utility model provides a junction box, includes box body (10) and upper cover (20), offers via hole (11) that supply cable (30) to get into on box body (10), is provided with a plurality of binding post (40) in box body (10), and binding post (40) are connected its characterized in that with preforming terminal (31) of cable (30) tip: an insulating partition plate (50) is arranged in the inner cavity of the box body (10) between the adjacent wiring terminals (40).

2. The junction box of claim 1, wherein: four corner positions of the box body (10) are provided with upright columns (12), the height of each upright column (12) is consistent with the height of the insulating partition plate (50) and is higher than the upper hole edge of each through hole (11), the upper end faces of the upright columns (12) are provided with threaded holes (121), cover plates (13) are arranged on the upper end faces of the upright columns (12) and are fixedly connected with the upright columns (12) through bolts, and the cover plates (13) and the upper covers (20) are arranged at intervals.

3. The junction box of claim 1, wherein: a boss (41) is arranged in the box body (10), a plurality of mounting holes (411) are formed in the boss (41) at intervals along the length direction of the boss, nuts (42) are arranged in the mounting holes (411), and the pressing sheet terminals (31) are stacked on the nuts (42) and are pressed on the nuts (42) through threaded fasteners (43).

4. The junction box of claim 3, wherein: the nut (42) is welded on the lower plate surface of the connecting flange (44), the outer contour of the connecting flange (44) is larger than the aperture of the mounting hole (411), the boss (41) on the periphery of the mounting hole (411) is provided with a connecting hole (412), the connecting flange (44) is fixedly connected with the boss (41) through the bolt, and the pressing sheet terminal (31) is pressed on the connecting flange (44) through the threaded fastener (43).

5. The junction box of claim 3, wherein: one side of the box body (10) protrudes outwards to be provided with a mounting groove (14), the notch of the mounting groove (14) faces upwards and is flush with the upper opening of the box body (10), a through hole (141) is formed in the bottom of the mounting groove (14), the proximity switch (60) penetrates through the through hole (141) from the outside to enter the mounting groove (14) and is fixedly connected with the mounting groove (14), and the sensing head of the proximity switch (60) is arranged at an interval with the upper cover (20).

6. The junction box of claim 5, wherein: the bottom of the mounting groove (14) is flush with the cover plate (13), and the proximity switch (60) is in sealing fit with the through hole (141).

7. The junction box of claim 5, wherein: the upper opening edge of the box body (10) is provided with a connecting lug (a), the outer edge of the upper cover (20) is also provided with the connecting lug (a), a bolt penetrates through the box body (10) and the connecting lug (a) on the upper cover (20) to fixedly connect the box body and the upper cover, a convex ring (21) is arranged on the lower plate surface of the upper cover (20) in a downward protruding mode, the convex ring (21) abuts against the inner wall of the box body (10) to form a spigot fit, and a sealing ring (70) is further arranged between the upper end surface of the upper cover (20) and the upper end surface of the box body (10).

8. The junction box of claim 1, wherein: the periphery of the cable (30) is sleeved with a gland head (32), the gland head (32) is fixed on the box body (10) and the gland head (32) is connected with the through hole (11) in a sealing mode.

9. The junction box of any of claims 1-8, wherein: the box body (10) is made of insulating materials or metal materials with no surface sprayed with insulating coatings, the upper cover (20) is made of metal materials, and the cover plate (13), the gland head (32) and the connecting flange (44) are made of light insulating materials.