KR20100039921A

KR20100039921A - Fuel level sender

Info

Publication number: KR20100039921A
Application number: KR1020080098903A
Authority: KR
Inventors: 장진욱; 조성종
Original assignee: 현담산업 주식회사
Priority date: 2008-10-09
Filing date: 2008-10-09
Publication date: 2010-04-19

Abstract

The present invention relates to a fuel level sender with enhanced durability. In the fuel level sender of the present invention, a fuel level sender for detecting a fuel remaining amount in a fuel tank, the fuel level sender comprising: a retainer connected to the buoyancy member and installed to rotate at a predetermined angle by rotation of the buoyancy member; A body part in which the retainer is installed and a conductive pattern is formed to face the retainer; And a contact plate elastically mounted to the retainer and having a contact portion in electrical contact with the conductive pattern, wherein the contact portion is made of one or two or more selected from the group consisting of Pd, Au, and Pt. It includes a main metal and a misch metal, the misch metal is 0.001 to 0.5wt%, the remainder is characterized by consisting of an alloy composed of the main metal.

Description

Fuel Level Sender

The present invention relates to a fuel level sender, and more particularly, to prevent magnetization of a contact portion in contact with a conductive pattern, to increase hardness, to minimize wear loss, to extend service life, and to prevent impurities from being attached by magnetization. It is about the fuel level sender to increase.

The general fuel level sender is for measuring the remaining amount by sensing the liquid level of the fuel in the fuel tank. In the fuel level sender, the arm to which the buoyancy member is fixed rotates according to the amount of fuel remaining in the fuel tank, and the position where the contact point of the contact plate contacts the conductive line pattern changes according to the rotation angle of the arm. The resistance value changes according to the position change, and the remaining fuel amount is displayed by sensing an electrical signal according to the resistance value change.

Conventionally, Ag is mainly used as a conductive line panel and a conductive contact plate material in order to improve the chargeability of the contact of the contact plate and the conductive line pattern. In addition, to reduce the loss caused by wear, different types of alloys were used to increase the hardness.

On the other hand, in the case of adding a dissimilar alloy such as nickel (Ni) or cobalt (Co) to minimize wear of the contact portion of the conductive plate in contact with the conductive line panel, the hardness of the contact portion is increased, thereby reducing the wear loss. Although the service life can be extended, the contact portion including the nickel or cobalt as an additive is magnetized by frequent friction between the conductive line panel and the contact portion, and thus magnetizes the impurities in the fuel of the fuel tank. Impurity having may be attached to the contact portion.

In this case, an error in the resistance value may occur due to an impurity attached to the contact portion, thereby lowering the accuracy of indicating the remaining fuel amount, thereby acting as a factor that lowers the reliability of the product.

The present invention is to solve such a problem, while increasing the hardness while preventing the magnetization of the contact portion of the fuel level sender to increase the hardness by minimizing wear loss to extend the service life and at the same time to prevent the adhesion of impurities by magnetization to improve product reliability It is an object to provide a fuel level sender.

In order to achieve the above object, the present invention, in the fuel level sender for detecting the fuel remaining amount of the fuel tank, the retainer is connected to the buoyancy member is installed to rotate a predetermined angle by the rotation of the buoyancy member; A body part in which the retainer is installed and a conductive pattern is formed to face the retainer; And a contact plate elastically mounted to the retainer and having a contact portion in electrical contact with the conductive pattern, wherein the contact portion is made of one or two or more selected from the group consisting of Pd, Au, and Pt. A fuel level sender comprising a main metal and a mismetal, the mismetal being 0.001 to 0.5 wt%, the remainder being made of an alloy composed of the main metal.

In addition, the present invention is a fuel level sender for detecting the fuel remaining amount of the fuel tank, the retainer is connected to the buoyancy member is installed to rotate a predetermined angle by the rotation of the buoyancy member; A body part in which the retainer is installed and a conductive pattern is formed to face the retainer; And a contact plate elastically mounted to the retainer and having a contact portion in electrical contact with the conductive pattern, wherein the contact portion includes a wear-resistant plating layer formed on at least one layer with a predetermined thickness on an outer surface thereof. The plating layer includes a main metal and a misch metal composed of one kind or a mixture of two or more kinds selected from the group consisting of Pd, Au, and Pt, wherein the misch metal is 0.001 to 0.5 wt%, and the rest is an alloy composed of the main metal Provide a fuel level sender characterized by the above.

Preferably, the wear resistant plating layer is formed on an outer surface of the contact end exposed to the contact plate facing the conductive pattern.

Preferably, the misch metal is one or two selected from the group consisting of scandium (Sc), lanthanum (La), cerium (Ce), hafnium (Hf), palladium (Pd), yttrium (Y), and neodymium (Nd). It is a mixture on paper.

Preferably, the main metal further comprises at least one impurity of Cu or Ag.

The fuel level sender of the present invention is composed of an alloy made of Ag-rare metal-mesh metal, which makes contact with the conductive pattern, thereby increasing hardness while essentially preventing magnetization by friction with the conductive pattern, thereby extending the service life of the product. By generating a precise electrical signal, it is possible to stably maintain the accuracy of the fuel residual measurement value.

The fuel level sender includes a configuration as in FIG. Fig. 1 (a) shows the overall shape of the fuel level sender. The buoyancy member 120 is moved according to the level of the fuel, the arm 121 is connected to the buoyancy member 120 is connected to the retainer 103 is rotatably connected to the body portion (101). The arm 121 transmits the rotation of the buoyancy member to the retainer, and the retainer 103 includes a contact plate 107 for contacting the conductive pattern 105 formed on the body portion 101.

As shown in FIG. 1B, the contact plate 107 of the retainer is elastically connected to the retainer to elastically contact the conductive pattern 105. A contact portion 111 for electrically contacting the conductive pattern is formed at the end of the contact plate 107. As the contact portion 111 of the contact plate makes contact with the conductive pattern 105, a change in the fuel level of the fuel tank is detected through a change in the resistance value of the conductive pattern.

On the other hand, the contact portion 111 is connected to the specific position of the contact plate 107 by a riveting method is integrated.

As shown in (c) of FIG. 1, the contact part 111 may include a contact end 115 exposed to the contact plate 107 facing the conductive pattern and an extension formed from the contact end and formed on the contact plate 107. Inserted into a ball (not shown) includes a body fixing end 113 is fixed by the riveting method.

The contact portion 111 is composed of a main metal and a misch metal (misch metal) consisting of one or two or more mixtures selected from the group consisting of Pd, Au, Pt, the misch metal is 0.001 to 0.5wt% Since the remainder is composed of the main metal, hardness can be increased to improve wear resistance without magnetization even during frequent friction with the contact plate 107.

When at least one or more metals such as Pd, Au, and Pt are included in the contact portion 111, the metals are stable and do not easily react with sulfur included in the fuel, thereby preventing corrosion, thereby preventing fuel resistance. Can improve.

Here, Pd, Au, and Pt constituting the contact portion is a metal material which can improve fuel resistance, but is a rare metal, and the purchase price is relatively high compared to other general metals, thereby increasing the product cost. Accordingly, by including at least one impurity such as Ag or Cu in the main metal to reduce the overall specific gravity of the rare metal can reduce the production cost of the product instead of lowering the fuel resistance.

At this time, the impurities are preferably provided in 0.1 to 50 parts by weight based on 100 parts by weight of the main metal.

In addition, the contact portion 111 may be provided with a wear-resistant plating layer 117 formed on the outer surface of the body made of a conductive metal material at a predetermined thickness, as shown in Figure 2 (a), such a wear-resistant plating layer (117) comprises a main metal and a misch metal composed of one or two or more kinds selected from the group consisting of Pd, Au, and Pt, and the misch metal is 0.001 to 0.5 wt%, The remainder may be composed of a main metal.

Here, the main metal constituting the wear resistant plating layer 117 may include at least one impurity such as Ag or Cu as a rare metal so as to lower the total weight of Pd, Au, and Pt, which are expensive to purchase. .

In this case, the wear-resistant plating layer 117 may be formed on the entire outer surface of the contact portion 111, but is not limited thereto, as shown in FIG. 2 (b), the contact plate facing the conductive pattern 105 It may be formed only on the outer surface of the contact end 115 that is externally exposed to the 107 to substantially contact the conductive pattern 105.

At this time, the wear-resistant plating layer 117 may be formed by a general metal plating process, and is not particularly limited. At this time, the plating layer to be plated is preferably formed to be about 5 to 10㎛.

In addition, the mesh metal included in the wear-resistant plating layer 117 coated on the contact portion 111 or the outer surface thereof is scandium (Sc), lanthanum (La), cerium (Ce), hafnium (Hf), palladium (Pd), It may be composed of one or a mixture of two or more selected from the group consisting of yttrium (Y) and neodymium (Nd).

Conventional example

The prior art shows the wear state at the contact end of the contact when the contact portion is mounted on the contact plate to form a contact portion in contact with the conductive pattern in the Au 93.0wt%, Ag 7.0wt%.

As shown in Figure 3 (a), after performing the durability test to detect the contact performance of the contact portion and the conductive pattern, that is, the resistance value of the conductive pattern 2 million times, and then measured the degree of wear of the contact end of the contact portion It was found that the stage was worn by about 60㎛ wear.

Example

In the present embodiment, when the contact portion is mounted on the contact plate and the contact portion is in contact with the conductive pattern is composed of Au 93.0wt%, Ag 6.9wt%, Mish metal 0.1wt% shows the wear state at the contact end of the contact portion.

As shown in (b) of FIG. 3, after performing a durability test to detect the contact performance of the contact portion and the conductive pattern, that is, a change in the resistance value of the conductive pattern 2 times, and then measuring the degree of wear of the contact end, the contact portion of the contact portion It can be seen that the stage is worn by about 5㎛ wear.

Accordingly, when comparing the wear degree of the conventional contact portion and the wear degree of the embodiment of the present invention, it can be seen that the contact wear amount is significantly reduced when the contact metal is included in a certain amount.

While the invention has been shown and described with respect to particular embodiments, it will be understood that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

1 is a full and partial perspective view of a fuel level sender according to the present invention.

2 (a) and (b) are sectional views in which a plating layer is formed on a contact portion provided in the fuel level sender according to the present invention.

3 is a view illustrating a worn state of a contact portion provided in a fuel level center.

a) is a conventional example which does not contain a misch metal,

b) is an embodiment of the invention comprising a misch metal.

Claims

In the fuel level sender for detecting the remaining fuel in the fuel tank,

A retainer connected to the buoyancy member and installed to rotate at an angle by the rotation of the buoyancy member;

A body part in which the retainer is installed and a conductive pattern is formed to face the retainer; And

And a contact plate elastically mounted to the retainer and having a contact portion in electrical contact with the conductive pattern.

The contact portion includes a main metal and a misch metal composed of one kind or a mixture of two or more kinds selected from the group consisting of Pd, Au, and Pt, wherein the misch metal is 0.001 to 0.5 wt%, and the remainder is composed of the main metal. A fuel level sender, characterized in that consisting of.

In the fuel level sender for detecting the remaining fuel in the fuel tank,

The contact portion includes at least one wear-resistant plating layer formed on the outer surface at a predetermined thickness, and the wear-resistant plating layer includes a main metal and a miss metal made of one or two or more mixtures selected from the group consisting of Pd, Au, and Pt. And, the misch metal is 0.001 to 0.5wt%, the remainder is a fuel level sender, characterized in that made of an alloy composed of the main metal.

The fuel level sender of claim 2, wherein the wear-resistant plating layer is formed on an outer surface of a contact end exposed to the contact plate facing the conductive pattern.

The method of claim 1 or 2, wherein the mesh metal is made of scandium (Sc), lanthanum (La), cerium (Ce), hafnium (Hf), palladium (Pd), yttrium (Y), neodymium (Nd) Fuel level sender, characterized in that one or more mixtures selected from the group.

3. The fuel level sender of claim 1 or 2, wherein the main metal further comprises at least one impurity of Cu or Ag.