Automotive hinge parts

Abstract

To provide a vehicular hinge member capable of suppressing generation of galvanic corrosion at an abutment surface to a hood while suppressing manufacturing cost.SOLUTION: A vehicular hinge member includes a base part fixed onto a vehicle body and an arm part with one end connected with the base part to be rotatable and the other end fixed to a hood made of aluminum alloy. The arm part is constituted of a resin-coated steel plate and a resin layer of the resin-coated steel plate is formed on an abutment surface to a hood at the arm part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hinge member for an automobile. [Background technology]

[0002] As disclosed in Patent Document 1, resin-coated steel sheets, the surface of which is covered with a resin layer and which have anti-rust properties, are used in automobiles. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-202686 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, since resin-coated steel sheets are more expensive than normal steel sheets, it is necessary to appropriately select the locations in the automobile where they are used. Incidentally, the steel hinge member that connects the vehicle body and the aluminum alloy hood is individually electrocoated before being attached to the vehicle body and the hood in order to prevent galvanic corrosion on the contact surface with the aluminum alloy hood, and furthermore, anti-rust wax is applied to the contact surface of the hinge member with the hood.

[0005] The present invention has been made in consideration of the above circumstances, and provides an automobile hinge member that can suppress galvanic corrosion on the contact surface with the hood while suppressing manufacturing costs. [Means for solving the problem]

[0006] The hinge member for an automobile according to one aspect of the present invention comprises: A base portion fixed to a vehicle body; one end of the arm portion is rotatably connected to the base portion, and the other end of the arm portion is fixed to an aluminum alloy hood, The arm portion is made of a resin-coated steel plate, and a resin layer of the resin-coated steel plate is formed on the surface of the arm portion that comes into contact with the hood.

[0007] In an automobile hinge member according to one aspect of the present invention, an arm portion fixed to an aluminum alloy hood is made of a resin-coated steel plate, and a resin layer of the resin-coated steel plate is formed on the contact surface of the arm portion with the hood. Therefore, galvanic corrosion at the contact surface with the hood can be suppressed without electrocoating the automobile hinge member alone or applying anti-rust wax to the contact surface with the aluminum alloy hood. In other words, galvanic corrosion at the contact surface with the hood can be suppressed while suppressing manufacturing costs.

[0008] The base portion may also be made of a resin-coated steel plate, and a resin layer of the resin-coated steel plate may be formed on the surface of the base portion that comes into contact with the vehicle body. With this configuration, corrosion of the surface that comes into contact with the vehicle body can be suppressed.

[0009] On the other hand, the base portion may be made of a steel plate that is not coated with resin, which can reduce manufacturing costs.

[0010] The resin layer of the resin-coated steel plate constituting the arm portion may also be formed on the surface opposite the abutment surface, and the thickness of the first resin layer formed on the abutment surface may be greater than the thickness of the second resin layer formed on the opposite surface. Furthermore, the resin layer of the resin-coated steel plate constituting the arm portion does not have to be formed on the surface opposite to the contact surface. With this configuration, the manufacturing costs can be further reduced. Effect of the Invention

[0011] According to the present invention, it is possible to provide an automobile hinge member that can suppress galvanic corrosion on the contact surface with the hood while suppressing manufacturing costs. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of a hinge member for an automobile according to a first embodiment. FIG. [Diagram 2] 2 is a schematic cross-sectional view of a hood attachment portion 23 attached to a hood 40. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. In addition, the following description and drawings are appropriately simplified for clarity of explanation.

[0014] (First embodiment) The configuration of the hinge member for an automobile according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view of the hinge member for an automobile according to the first embodiment. 1, the automobile hinge member according to this embodiment includes a base portion 10, an arm portion 20, and a pin 30. The automobile hinge member according to this embodiment is a steel hinge member that connects, in an openable and closable manner, a vehicle body (not shown) to which the base portion 10 is fixed and an aluminum alloy hood (not shown in FIG. 1) to which the arm portion 20 is fixed.

[0015] Naturally, the right-handed xyz Cartesian coordinate system shown in Fig. 1 and Fig. 2 described later is for the convenience of explaining the positional relationship of the components. In the example of Fig. 1 and Fig. 2, the positive x-axis direction indicates the vehicle front direction, the positive y-axis direction indicates the vehicle inward direction, and the positive z-axis direction indicates the vertical upward direction.

[0016] A pair of automotive hinge members are provided at both ends of the hood in the vehicle width direction (the y-axis direction in FIG. 1). The automotive hinge member shown in FIG. 1 is fixed to the end of the left side (the negative y-axis side) of the hood when viewed from the front side of the vehicle (the positive x-axis side). On the other hand, the automotive hinge member fixed to the end of the right side (the positive y-axis side) of the hood when viewed from the front side of the vehicle (the positive x-axis side) has a structure that is symmetrical (plane symmetrical with respect to the xz plane) to the automotive hinge member shown in FIG. 1 when viewed from the front side of the vehicle (the positive x-axis side).

[0017] The base portion 10 is a steel plate member fixed to the vehicle body. As shown in Fig. 1, the base portion 10 has a substantially L-shaped cross section when viewed from the front side of the vehicle (the x-axis positive side). The base portion 10 is press-formed from, for example, a single steel plate. The base portion 10 shown in Fig. 1 includes a vehicle body attachment portion 11 for attachment to the vehicle body, and a support portion 12 for supporting the arm portion 20.

[0018] As shown in Fig. 1, the vehicle body mounting portion 11 is a flat plate-shaped portion extending in the vehicle front-rear direction (x-axis direction). A pair of screw holes 11a is provided at both ends of the vehicle front-rear direction. The base portion 10 is fixed to the vehicle body by screws inserted into the screw holes 11a. The lower surface of the vehicle body mounting portion 11 is the surface that comes into contact with the vehicle body.

[0019] The support portion 12 is formed to rise substantially vertically from the end portion of the vehicle body mounting portion 11 on the vehicle inner side (y-axis positive side). The width of the support portion 12 in the vehicle front-rear direction (x-axis direction) narrows toward the top, and a through hole for inserting the pin 30 is provided at the upper end portion. The support portion 12 shown in Fig. 1 is provided with an inclined portion 12a in the middle in the up-down direction (z-axis direction) that protrudes diagonally upward toward the vehicle inner side (y-axis positive side).

[0020] 1, one end of the arm portion 20 is rotatably connected to the base portion 10, and the other end is fixed to an aluminum alloy hood. The arm portion 20 is a steel plate member extending forward of the vehicle (x-axis positive direction) as a whole, and has a substantially L-shaped cross section when viewed from the front side of the vehicle (x-axis positive direction side). The arm portion 20 is also press-formed from, for example, a single steel plate.

[0021] The arm portion 20 shown in FIG. 1 has one end connected to the base portion 10 and a curved curved portion 21, a straight portion 22 extending in a straight line from the other end of the curved portion 21, and a hood attachment portion 23 for attachment to a hood. It should be noted that these locations of the arm portion 20 are defined for the convenience of explanation, and the configuration of the arm portion 20 is not limited to this.

[0022] 1, the curved portion 21 is curved in a substantially U-shape so as to protrude downward. One end of the curved portion 21 is provided with a through hole for inserting a pin 30 therethrough, and the one end of the curved portion 21 is rotatably connected to an upper end of the support portion 12 via the pin 30. A straight portion 22 extends in a straight line obliquely upward and forward from the other end of the curved portion 21. That is, when viewed from the outside of the vehicle (the y-axis negative direction side), the curved portion 21 and the straight portion 22 as a whole are formed in a substantially J-shape.

[0023] 1, the hood attachment portion 23 extends linearly toward the front of the vehicle (positive direction of the x-axis) from the tip of the straight portion 22. That is, when viewed from the outside of the vehicle (negative direction of the y-axis), the straight portion 22 and the hood attachment portion 23 as a whole are formed so as to be bent in a substantially L-shape.

[0024] The upper surface of the hood attachment portion 23 is a contact surface 23b with the hood, and a screw hole 23a is provided at the end of the contact surface 23b facing the front of the vehicle. The arm portion 20 is fixed to the hood by a screw inserted through the screw hole 23a. In addition, the contact surface 23b with the hood is shown by a dot in Fig. 1. Also, a plurality of screw holes 23a may be provided.

[0025] Here, Fig. 2 is a schematic cross-sectional view of the hood attachment portion 23 attached to the hood 40. As shown in Fig. 2, the arm portion 20 is made of a resin-coated steel plate in which the entire upper surface of the steel plate SS is covered with a resin layer (first resin layer) RL1 and the entire lower surface of the steel plate SS is covered with a resin layer (second resin layer) RL2. That is, as shown in Fig. 2, the resin layer RL1 is formed on the abutment surface 23b of the hood attachment portion 23 with the hood 40.

[0026] Therefore, galvanic corrosion at the contact surface 23b with the hood 40 can be suppressed without electrocoating the hinge member for an automobile by itself or applying anti-rust wax to the contact surface with the aluminum alloy hood 40. In other words, galvanic corrosion at the contact surface 23b with the hood 40 can be suppressed while suppressing manufacturing costs. Specifically, the hinge member for an automobile according to the present embodiment is, for example, electrocoated after being fixed to the vehicle body and the hood 40. After the electrocoating, the hinge member for an automobile is further, for example, coated with an undercoat and a topcoat.

[0027] Here, the steel sheet SS is not particularly limited, but is composed of, for example, ordinary steel or steel containing additive elements such as chromium. In addition, in order to improve the rust prevention performance, a plating film may be provided on the surface of the steel sheet SS. That is, the steel sheet SS may be a plated steel sheet. The plating film is not particularly limited, but examples thereof include a plating film containing any one of metal elements such as zinc, aluminum, cobalt, tin, and nickel, and an alloy plating film containing these metal elements.

[0028] The resin layers RL1 and RL2 are made of organic resins such as, but are not limited to, a water-based coating composition, an organic solvent-based coating composition, etc. The organic resin contains, for example, an anti-rust pigment and has anti-rust performance. The anti-rust pigment is not limited to, but preferably contains at least one of silicate compounds, phosphate compounds, vanadate compounds, and metal oxide particles. Furthermore, the organic resin may contain, for example, a conductive pigment and have conductivity. The conductive pigment is not limited to, but includes at least one of metals, alloys, conductive carbon, iron phosphide, carbides, and semiconductor oxide particles.

[0029] The thicknesses of the resin layers RL1 and RL2 are, for example, approximately the same. However, from the viewpoint of suppressing galvanic corrosion at the contact surface with the hood 40, the thickness of the resin layer RL1 formed on the contact surface 23b with the hood 40 may be greater than the thickness of the resin layer RL2 formed on the surface on the opposite side. Furthermore, the resin layer RL1 may be formed only on the contact surface 23b with the hood 40, and the resin layer RL2 may not be formed on the surface on the opposite side. With such a configuration, the manufacturing cost can be further reduced. Furthermore, as long as the resin layer RL1 is formed on the abutting surface 23b with the hood 40, the resin layer RL1 does not have to be formed on the entire surface.

[0030] In order to improve the adhesion of the resin layers RL1, RL2 to the steel sheet SS, corrosion resistance, etc., a base treatment film may be provided between the resin layers RL1, RL2 and the surface of the steel sheet SS. The number of layers and composition of the base treatment film are not particularly limited. In the hinge member for an automobile according to this embodiment, a resin layer is not formed on the end face of the steel plate SS, but a resin layer may be formed on the end face of the steel plate SS.

[0031] As described above, in the automobile hinge member according to this embodiment, the arm portion 20 is made of a resin-coated steel plate, and a resin layer RL1 is formed on the contact surface 23b of the arm portion 20 with the hood 40. Therefore, galvanic corrosion on the contact surface 23b with the hood 40 can be suppressed without electrocoating the automobile hinge member alone or applying anti-rust wax to the contact surface with the aluminum alloy hood 40. In other words, galvanic corrosion on the contact surface with the hood 40 can be suppressed while suppressing manufacturing costs.

[0032] In the hinge member for an automobile according to this embodiment, not only the arm portion 20 but also the base portion 10 may be made of a resin-coated steel plate, and a resin layer may be formed on the contact surface of the base portion 10 with the vehicle body. Corrosion on the contact surface with the vehicle body can be suppressed not only when the vehicle body is made of an aluminum alloy, but also when the vehicle body is made of a steel plate that is not a resin-coated steel plate.

[0033] On the other hand, in the hinge member for an automobile according to this embodiment, the base portion 10 may be made of an ordinary steel plate that is not resin-coated. By limiting the portion using the resin-coated steel plate to only the arm portion 20, the manufacturing cost can be reduced. For example, if the vehicle body is made of a resin-coated steel plate, it is not necessary to make the base portion 10 from a resin-coated steel plate from the viewpoint of rust prevention.

[0034] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0035] 10 Base 11 Vehicle body mounting part 11a screw hole 12 Support part 12a Slope 20 Arm section 21 Curved section 22 Straight section 23 Hood attachment part 23a screw hole 23b Contact surface 30 pin 40 Food RL1, RL2 resin layer SS steel plate

Claims

1. A base portion fixed to a vehicle body; one end of the arm portion is rotatably connected to the base portion, and the other end of the arm portion is fixed to an aluminum alloy hood, The arm portion is made of a resin-coated steel plate, and a resin layer of the resin-coated steel plate is formed on a contact surface of the arm portion with the hood, The base portion is also made of a resin-coated steel plate, and a resin layer of the resin-coated steel plate is formed on a contact surface of the base portion with the vehicle body. Automotive hinge components.

2. A base portion fixed to a vehicle body; one end of the arm portion is rotatably connected to the base portion, and the other end of the arm portion is fixed to an aluminum alloy hood, The arm portion is made of a resin-coated steel plate, and a resin layer of the resin-coated steel plate is formed on a contact surface of the arm portion with the hood, The base portion is made of a steel plate that is not resin-coated. Automotive hinge components.

3. The resin layer of the resin-coated steel plate constituting the arm portion is also formed on a surface opposite to the contact surface, The thickness of the first resin layer formed on the contact surface is greater than the thickness of the second resin layer formed on the opposite surface.

3. The hinge member for an automobile according to claim 1 or 2.

4. The resin layer of the resin-coated steel plate constituting the arm portion is not formed on the surface opposite to the abutment surface.

3. The hinge member for an automobile according to claim 1 or 2.

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