CN102386353A - Battery case cover connecting structure - Google Patents

Abstract

The invention provides a battery case cover connecting structure, and the connection is firm and has good reliability. The structure comprises a case cover and a case pedestal; a T-shaped screw hole assembly is embedded in one of the case cover and the case pedestal, and a through hole is disposed on the other one; a screw passes through the through hole and is connected with the screw hole by threads; the invention is characterized in that a T-shaped rod part of the T-shaped screw hole assembly is provided with an annular groove.

Description

A kind of battery case lid syndeton

Technical field

The present invention relates to the technical field of battery of electric vehicle box parts, be specially a kind of battery case lid syndeton.

Background technology

Electric motor car is because use occasion directly cause its lid in use loosening easily, and normally screw connection between the lid normally adds direct injection moulding internal thread in man-hour in the industry at the bottom of box; On lid, process through hole then, during assembling, screw passes the through hole of lid; Directly with box at the bottom of screwed hole with being threaded because that working of plastics is prone to is aging, often jolt because of road; The active force of screw directly acts at the bottom of the box, thereby causes ftractureing at the screw place at the bottom of the box, sees Fig. 1; Now in the industry in structural member 3 injection mouldings that directly will have screw at the bottom of the process cartridge at 1 o'clock in box body, and the material of structural member 3 is firmer than working of plastics, the profile of structural member 3 is the T type; When structural member 3 was stressed like this, the active force of screw 5 was concentrated in the joint of T type root and working of plastics, caused stress to be concentrated easily; T type root is uprooped working of plastics easily like this, causes the disengaging of the working of plastics at this place, and 4 is the through hole of lid.

Summary of the invention

To the problems referred to above, the invention provides a kind of battery case lid syndeton, its connection firmly, good reliability.

Its technical scheme is such: it comprises lid and box base; One in said lid and the box base is embedded with the screw assembly that profile is the T type; Be provided with through hole in another; Screw passes through hole and said screw with being threaded, and it is characterized in that: the T type bar portion of said T type screw assembly is provided with annular groove.

After the present invention adopted said structure, screwed hole can be shared by annular groove and T type root the active force of working of plastics jointly, has alleviated the stress concentration phenomenon, thereby has guaranteed the useful life of battery case.

Description of drawings

Fig. 1 is the structural representation of existing syndeton;

Fig. 2 is a constitutional diagram of the present invention.

Embodiment

See Fig. 2; The present invention includes lid 1 and box base 2, one in lid 1 and the box base 2 is embedded with the screw assembly 3 that profile is the T type, is provided with through hole 4 in another; Screw 5 passes through hole 4 and is threaded with screw assembly 3 usefulness, and the T type bar portion of T type screw assembly 3 is provided with annular groove 6.

Claims (1)

1. battery case lid syndeton; It comprises lid and box base; One in said lid and the box base is embedded with the screw assembly that profile is the T type; Be provided with through hole in another, screw passes through hole and said screw with being threaded, and it is characterized in that: the T type bar portion of said T type screw assembly is provided with annular groove.

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