CN203491389U - Welding structure of electrode insertion sheet and enamelled wire of electric fuel pump - Google Patents

Abstract

The utility model discloses a welding structure of an electrode insertion sheet and an enamelled wire of an electric fuel pump. The electrode insertion sheet (1) is provided with a hook (1a); and the enamelled wire (2) is hung on the hook (1a), and is welded with the hook (1a) in a spot welding manner. The welding structure of the electrode insertion sheet and the enamelled wire is characterized in that the surface of the electrode insertion sheet (1) is a zinc-nickel alloy layer (1b), tin layers (3) are adhered to the spot welding positions and the position where the hook (1a) contacts with the enamelled wire (2), the thickness of the tin layer (3) is more than three times that of the zinc-nickel alloy layer (1b), and therefore spot welding points and the position where the hook (1a) contacts with the enamelled wire (2) are all wrapped with the tin layers (3). The welding structure is strong in corrosion resistance, can undergo corrosion of biological fuel oils (M100, E100), and usage requirements of the welding structure in biological fuel oils (M100, E100) are satisfied.

Description

The Welding Structure of electric fuel punp electrode plug and enamelled wire

Technical field

The utility model relates to the pith in engine fuel system---electric fuel punp, is specifically related to a kind of Welding Structure of electrode plug and enamelled wire of electric fuel punp.

Background technology

Electrode plug and enamelled wire in automobile electronic fuel oil jet fuel oil supply system are spot-welded together, then are immersed in together working medium---in gasoline, bio-fuel-oil (M100, E100).Electrode plug is brass, plating nickel on surface; Not moisture in 93# gasoline, do not belong to corrosive liquids, the electrode plug of welding and enamelled wire can normally be used.But bio-fuel-oil (M100, E100) alcohols content is high, contain minor amount of water, corrosivity is stronger, if electrode plug and the enamelled wire of welding are immersed in bio-fuel-oil (M100, E100), place, welding position there will be corrosion and ablation phenomen, thereby causes electric current to transmit.

Analyze reason: as shown in Figure 3, enamelled wire 2 hangs on the hook 1a of electrode plug 1, and spot-welded together with hook 1a.Under electrode plug 1 and the rush of current of enamelled wire 2 at spot welding machine, closely paste, and the overlay coating of electrode plug 1 is by spot welding machine ablative degradation, in use, bio-fuel-oil (M100, E100) directly corrodes (as shown by arrows in FIG.) to its weld, and continual corrosion can make weld rapid failure.

Utility model content

The purpose of this utility model is to solve electrode plug and enamelled wire point postwelding, is immersed in bio-fuel-oil, and surface there will be the technical problem of corrosion and ablation.

For this reason, the technical scheme that the utility model adopts is: the Welding Structure of a kind of electric fuel punp electrode plug and enamelled wire, on described electrode plug (1), be provided with hook (1a), described enamelled wire (2) hangs in hook (1a), and spot-welded together with hook (1a), key is: the surface of described electrode plug (1) is admiro layer (1b), in described spot welding position, the position that hook (1a) contacts with enamelled wire (2) is all attached with tin layer (3), described tin layer (3) thickness is the more than three times of admiro layer (1b) thickness, thereby by spot welding point, in hook (1a) is all wrapped in enamelled wire (2) contact position.

Be preferably, the gap L between the eave tile of described hook (1a) and electrode plug (1) body is less than the diameter of enamelled wire (2).Fastness and the reliability of between enamelled wire and electrode plug, welding have further been guaranteed.

Further, the thickness of described admiro layer (1b) is 5～8um.

The beneficial effects of the utility model:

(1) admiro layer is electroplated on electrode plug, thereby forms the very negative admiro diaphragm of a kind of current potential at surface of the work, compares original nickel coating, and antiseptic property is better;

(2) spot welding place and periphery thereof are wrapped up with tin layer, in use bio-fuel-oil (M100, E100) can directly not form corrosion to spot welding place, first tin layer is corroded, and tin layer possesses antiseptic property, therefore can be by bio-fuel-oil (M100, E100) corrosion by electrode plug spot welding place after tin layer parcel, this structure can meet in bio-fuel-oil (M100, E100) to be used.

Accompanying drawing explanation

Fig. 1 is the structural representation of electric fuel punp electrode plug.

Fig. 2 is the sectional drawing of Fig. 1.

Fig. 3 for the structural representation before improving, be also the structural representation before the utility model parcel tin layer.

Fig. 4 is structural representation of the present utility model.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail:

In conjunction with the electrode plug 1 shown in Fig. 1, Fig. 2, on it, be provided with two for the hook 1a of enamelled wire is installed, hook 1a and electrode plug 1 are one-body molded, and the quantity of hook 1a arranges as required.Electrode plug 1 adopts brass to make, and on the surface of electrode plug 1, is provided with zn-ni alloy deposits 1b.Preferably, the nickel content in zn-ni alloy deposits 1 is lower than 10%, and zn-ni alloy deposits 1b adopts plating form to be attached to the surface of electrode plug, then carries out Passivation Treatment, forms one deck passivation protection film.

As shown in Figure 3, it is upper that enamelled wire 2 hangs over hook 1a, and spot-welded together with hook 1a.Spot welding adopts direct current or ac converter spot welding machine.

Shown in Fig. 3, Fig. 4, in spot welding position, the position that contacts with enamelled wire 2 of hook 1a is all attached with tin layer 3.Tin layer 3 thickness are the more than three times of admiro layer 1b thickness, thereby in spot welding point, hook 1a and enamelled wire 2 contact positions are all wrapped in.

Preferably, the gap L between the eave tile of hook 1a and electrode plug 1 body is less than the diameter of enamelled wire 2.The thickness of admiro layer 1b is preferably 5～8um.

Claims (3)

1. the Welding Structure of an electric fuel punp electrode plug and enamelled wire, on described electrode plug (1), be provided with hook (1a), described enamelled wire (2) hangs in hook (1a), and spot-welded together with hook (1a), it is characterized in that: the surface of described electrode plug (1) is admiro layer (1b), in described spot welding position, the position that hook (1a) contacts with enamelled wire (2) is all attached with tin layer (3), described tin layer (3) thickness is the more than three times of admiro layer (1b) thickness, thereby by spot welding point, in hook (1a) is all wrapped in enamelled wire (2) contact position.

2. the Welding Structure of electric fuel punp electrode plug according to claim 1 and enamelled wire, is characterized in that: the gap L between the eave tile of described hook (1a) and electrode plug (1) body is less than the diameter of enamelled wire (2).

3. the Welding Structure of electric fuel punp electrode plug according to claim 1 and enamelled wire, is characterized in that: the thickness of described admiro layer (1b) is 5～8um.

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