CN102882049B - Connection structure for battery box connector - Google Patents

Abstract

The invention provides a connection structure for a battery box connector. The connection structure comprises an insulating shell, a metal insert and a binding post, wherein the metal insert is in a shape of a right prism with a through hole between two bottom faces, the through hole is partially round and partially hexagonal; the binding post is provided with a hexagonal prism portion in the middle, and an annular clamping slot is arranged between a binding end of the binding post and the hexagonal prism portion; and the metal insert is inserted into the insulating shell, the binding post is inserted into the through hole of the metal insert, and the hexagonal prism portion of the binding post is matched with the hexagonal hole of the metal insert. The connection structure is high in torque bearing capacity and especially applicable to battery box connectors of automobile charging stations.

Description

Syndeton for battery case connector

Technical field

The present invention relates to field of connectors, be specifically related to the battery case connector that a kind of automobile fills electrical changing station.

Background technology

Along with popularizing of electric automobile, the construction that electric automobile fills electrical changing station is also progressively launching.In filling electrical changing station, use battery case connector, need to bear large current load, while therefore requiring wiring, adopt compared with high pulling torque to guarantee wire compacting on the binding post of battery case connector.For example EV-BC750V/400A high current connector, when carrying out wiring, requires moment of torsion to reach 35Nm.But the insulation shell of connector is generally working of plastics, when the high pulling torque on binding post is passed to insulation shell, easily there is the damages such as cracking in the position that insulation shell is connected with binding post.For preventing the generation of this problem, generally that terminals at binding post process external screw thread, by two nut check wires, when wiring, need a hand to use square nut under tool holder, another hand is locked upper square nut, avoids moment of torsion to pass to binding post, operating difficulties, and uncontrollable wire trend.

Summary of the invention

The object of this invention is to provide a kind of syndeton, the battery case connector that makes automobile fill electrical changing station can bear high pulling torque.

For achieving the above object, embodiments of the invention provide following technical scheme:

Syndeton for battery case connector, comprising:

Insulation shell;

Metal insert, it is between two bottom surfaces, to have the vertical prismatic shape of through hole, and described throughhole portions is circular hole, and part is hexagonal hole;

Binding post, its middle part has hexagon part, and has annular slot between its terminals and described hexagon part;

Described metal insert embeds described insulation shell, and described binding post inserts the through hole of described metal insert, and the hexagon part of described binding post coordinates with the hexagonal hole of described metal insert.

Preferably, the side of described metal insert has annular groove.

Preferably, the terminals of described binding post have internal thread.

Owing to embedding metal insert in insulation shell, and metal insert is vertical prismatic shape, so insulation shell can bear larger moment of torsion, when wiring, moment of torsion on binding post partly passes to metal insert by the hexagon of binding post, then passes to insulation shell, has avoided housing damage.By the annular slot on binding post, can realize the location of binding post and metal insert, insulation shell.

Further, the side of metal insert has annular groove, can make metal insert be entrenched in better in insulation shell, avoids inserts to come off.

Further, at the terminals of binding post, process internal thread, can adopt bolt to compress wire, save space.

Accompanying drawing explanation

Next in connection with accompanying drawing, embodiments of the invention are described in further detail, wherein:

Fig. 1 is the stereogram of the metal insert of embodiments of the invention;

Fig. 2 is the stereogram of the binding post of embodiments of the invention;

Fig. 3 is the assembling schematic diagram of embodiments of the invention.

Embodiment

Fig. 1 shows the structure of metal insert 10.Metal insert 10 is vertical prismatic shape, and in the present embodiment, right prism is eight prisms, and those of ordinary skills can imagine, it can also be the shapes such as six prisms, pentagonal prism.Between two bottom surfaces of metal insert 10, have through hole.A part for through hole is circular hole 11, and a part is hexagonal hole 12.In the side of metal insert 10, there is annular groove 13.

Fig. 2 shows the structure of binding post 20.The terminals 21 of binding post 20 have internal thread, and middle part has hexagon part 22.Between terminals 21 and hexagon part 22, on the outer surface of binding post 20, process annular slot 23.

Fig. 3 has shown insulation shell 30, metal insert 10 and binding post 20 are how to be assembled together the syndeton that forms battery case connector.For clear, in Fig. 3, insulation shell 30 schematically shows with dotted line.Insulation shell 30 is generally manufactured by plastics, by mode moulding such as injection, mold pressings.Metal insert 10 is embedded in insulation shell 30.On side due to metal insert 30, there is annular groove 13, make the chimeric more firm of metal insert 30, be not easy to come off.The terminals 21 of binding post 20, through hexagonal hole 12 and the circular hole 11 of metal insert 10, stretch out insulation shell 30.The hexagon part 22 of binding post 20 coordinates with the hexagonal hole 12 of metal insert.Mounting spring collar 50 on annular slot 23, and can between spring collar and the end face of insulation shell 30, increase plain cushion 40 as required, thus binding post 20 is fixed in metal insert 10.During wiring, the binding post of wire is enclosed within on bolt 60, then bolt 60 is screwed in to the internal thread of the terminals 21 of binding post 20.Now operating personnel can a tight bolt of hand-screw, and another hand keeps wire trend, easy-to-connect.When swivel bolt 60 compresses wire, moment of torsion can pass to metal insert 10 by six prismatic parts 22 of binding post 20, and then passes to insulation shell 30 by metal insert 10.Due to the existence of metal insert 10, even if adopted larger moment of torsion, still can guarantee that insulation shell 30 is not easy to be damaged.Those of ordinary skills can imagine at an easy rate, and terminals 21 also can have external screw thread, now only with a nut, can compress wire, no longer need double nut to lock.But adopt nut check compacting wire, need to be at the outside reserved longer terminals 21 of insulation shell 30, and employing bolt-locking compacting wire, can make bolt enter binding post 20 inside, need to not stay longer terminals 21 in insulation shell 30 outsides, save space, so terminals 21 process internal thread and have more advantage.

Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above-described embodiment, and being only subject to the restriction of claim, those of ordinary skills can easily modify to it and change, but do not leave essence design of the present invention and scope.

Claims (3)

1. for the syndeton of battery case connector, comprising:

Insulation shell;

Metal insert, it is between two bottom surfaces, to have the vertical prismatic shape of through hole, and described throughhole portions is circular hole, and part is hexagonal hole;

Binding post, described binding post middle part has hexagon part, and has annular slot between its terminals and described hexagon part;

Described metal insert embeds described insulation shell, and described binding post inserts the through hole of described metal insert, and the hexagon part of described binding post coordinates with the hexagonal hole of described metal insert.

2. the syndeton for battery case connector according to claim 1, is characterized in that, the side of described metal insert has annular groove.

3. the syndeton for battery case connector according to claim 1, is characterized in that, the terminals of described binding post have internal thread.