JPH11341603A - Collecting slider and method for manufacturing it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a collecting slider which causes a trolley wire to be less worn, which makes it possible to improve the conducting capability between a carbon sliding part and a collector shoe, and which is easy to mount. SOLUTION: A collecting slider is structured with a sliding part 1 which contact a trolley wire and a reinforcing part 2 formed solidly by impregnating light metals in the reinforcing part 2 into the gaps of carbons contained in the sliding part 1 made of porous carbons. Also, it is possible to strengthen the bond between the reinforcing part 2 and light metals by implanting metal fibers into the carbons or to fill fibrous reinforcing members into the light metals of the reinforcing part. To manufacture the slider above, porous carbons or porous carbons containing metal fibers, and fibrous reinforcing members when required, are laid inside a mold in advance. Then, molten light metals are filled with pressure into the mold above to be impregnated into or welded onto the carbons or carbons containing the metal fibers. Then, they are cooled to be taken out of the mold, and a thread is cut in the reinforcing part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector plate for a pantograph for an electric railway vehicle and a method for manufacturing the same.

[0002]

2. Description of the Related Art A sintered alloy mainly composed of copper has been used as a current collector for a pantograph for an electric railway vehicle for many years. However, in order to reduce wear of a trolley wire, a carbon slider has recently been used. The use of is increasing. Since the carbon slide plate is brittle, it cannot be directly bolted to the current collector boat like a metal slide plate, and as shown in FIG. 6, the metal sheath 12 is attached to the current collector boat 3 with the bolt 4 and slides with the metal sheath 12. Section (carbon slide plate) 1 was fixed. Also,
There has also been proposed a method of increasing wettability with a brazing material by mixing metal fibers with carbon, brazing to a metal plate, and then tightening bolts (see JP-A-05-279120). In the above method, as shown in FIG. 7, a metal fiber 5 is mixed into a sliding portion (carbon slide plate) 1 and bonded to a metal plate 14 with a brazing material 13, and the metal plate 14 is fixed to a current collecting boat with bolts 4. Is what you do.

[0003]

The above-mentioned prior art has the following problems. That is, it has been pointed out that the method using a metal sheath has a high contact resistance between the carbon ground plate and the sheath and easily generates heat, and that water enters between the ground plate and the sheath and corrodes the sheath. Also,
The method of brazing to a metal plate via mixed metal fibers has disadvantages such as a high level of skill required for brazing and difficulty in securing technicians and quality control. The present invention has been made in view of the above circumstances, and has as its object to provide a current collector boat having excellent durability and lubricity, which can be directly bolted to the current collector boat, and which can be easily manufactured. Is to provide a way.

[0004]

Means for Solving the Problems The above-mentioned problems are solved in the present invention as follows. According to the first aspect of the present invention, a current collector slide plate is reinforced by a sliding portion formed of porous carbon having a void inside which a molten metal of light metal such as aluminum can be impregnated, and a light metal such as aluminum. The sliding portion and the reinforcing portion are formed by impregnating a light metal of the same material as that of the reinforcing portion inside the void in the porous carbon. According to a second aspect of the present invention, in the first aspect of the present invention, metal fibers are contained in the porous carbon of the sliding portion. In addition, metal fibers may be contained in a part of the porous carbon, or may be contained in the whole. According to a third aspect of the present invention, in the first or second aspect, a fibrous reinforcing material is contained in the light metal of the reinforcing portion. According to the invention of claim 4 of the present invention, a porous carbon having a cavity capable of being impregnated with a molten metal of light metal is laid in a mold having a shape of a slide plate, and the molten metal of light metal is added to the mold. The current collector is manufactured by pressure injection, impregnating a light metal into the pores of the porous carbon, and fusing the porous carbon and the light metal. According to the invention of claim 5 of the present invention, a porous carbon and a fibrous reinforcing material having a void inside which a molten metal of light metal can be impregnated are laid in a mold having a shape of a slide plate, and the mold is placed in the mold. A current collector slide plate is manufactured by injecting a molten metal of light metal under pressure, impregnating the voids of the porous carbon with the light metal, and fusing the porous carbon and the light metal.

[0005] In the invention of claims 1 to 3 of the present invention, as described above, the porous carbon gap is impregnated with a light metal such as aluminum so that the sliding portion and the reinforcing portion are connected to each other to collect the current collector plate. The sliding part in contact with the trolley wire of the slide plate is made of carbon with excellent lubricity, and the reinforcing part that hits the back side as viewed from the sliding part is a light metal such as aluminum, so that the lubricating property with the trolley wire is Excellent, and can be bolted to the current collecting boat. In addition, since the light metal constituting the reinforcing portion enters the voids in the carbon and the sliding portion and the reinforcing portion are integrally formed, the conductivity is excellent, and there is no concern about water penetration. Further, in the invention of claim 2 of the present invention, since the metal fibers are contained in the carbon as described above, the light metal of the reinforcing portion not only enters the voids in the carbon but also welds to the metal fibers. Thereby, the connection between the sliding portion and the reinforcing portion becomes stronger. Claim 3 of the present invention
In the invention of the above, since the fibrous reinforcing material is contained in the light metal of the reinforcing portion as described above, the volume change accompanying the temperature change of the reinforcing portion is substantially the same as that of carbon. For this reason,
Deformation and breakage of the slide plate due to a temperature change during manufacturing or use can be prevented. In the invention of claim 4 of the present invention, carbon is previously laid in the mold,
Since the light metal melt is injected into the mold under pressure and impregnated into the voids in the carbon, the carbon sliding part and the light metal reinforcement can be manufactured as a solid integrated product. . In the invention of claim 5 of the present invention,
Laying carbon and fibrous reinforcement in the mold in advance,
The molten metal of light metal is injected under pressure into the mold, and the molten metal is impregnated into the fibrous reinforcing material and further impregnated into the voids in the carbon. It can be manufactured as an integrally molded product. Also,
Since the reinforcing portion contains the fibrous reinforcing material, the difference in the thermal expansion coefficient between the reinforcing portion and the sliding portion is small, so that deformation and breakage due to a temperature change during manufacturing or use can be prevented. In particular, when the metal fibers are contained in the carbon according to the fourth and fifth aspects of the present invention, the molten metal of the light metal and the metal fibers are welded to each other, so that it can be manufactured as a stronger integrated molded product.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing a first embodiment of the present invention. FIG. 3A is a cross-sectional view of the case where the metal fiber is not contained in the carbon and the fibrous reinforcing material is not contained in the light metal of the reinforcing portion, and FIG. FIG. 4C is a cross-sectional view of the case where the metal fiber is contained in carbon and the fibrous reinforcing material is contained in the light metal of the reinforcing portion. In FIG. 1, reference numeral 1 denotes a sliding portion (sliding plate) formed of porous carbon, and the porous carbon has a void therein that can be impregnated with a molten metal of a light metal such as aluminum. Reference numeral 2 denotes a reinforcing portion formed of a light metal such as aluminum, 3 denotes a current collector, 4 denotes a bolt, 5 denotes a metal fiber, and 6 denotes a fibrous reinforcing material.

In this embodiment, a sliding portion 1 made of carbon is used.
The light metal reinforcing portion 2 is connected as follows. In the case of FIG. 1A, the sliding portion 1 and the reinforcing portion 2 are connected by impregnating the light metal of the reinforcing portion 2 into the voids of the porous carbon constituting the sliding portion 1 and biting. FIG. 1 (b) (c)
In the case of (1), since the sliding portion 1 contains the metal fiber 5, the light metal of the reinforcing portion 2 impregnates and penetrates the voids of the porous carbon constituting the sliding portion 1, and the light metal of the reinforcing portion 2 slides. By welding with the metal fiber 5 of the moving part 1, a stronger connection can be obtained as compared with the case of FIG. Further, FIG.
In the case of (c), since the reinforcing portion 2 contains the fibrous reinforcing material, the volume change accompanying the temperature change of the reinforcing portion can be made substantially the same as the carbon constituting the sliding portion 1. . Therefore, deformation and breakage of the slide plate due to a temperature change during manufacturing or use can be prevented. In FIGS. 1B and 1C, the metal fiber is contained in all of the porous carbon constituting the sliding portion 1, but the metal fiber is contained only in the vicinity of the reinforcing portion 2 of the sliding portion 1. Even in the case described above, the light metal of the reinforcing part 2 can obtain a strong connection of the sliding part 1.

FIGS. 2A and 2B show a second embodiment of the present invention. 2 (a) and 2 (b), 1 is a sliding portion, 2 is a reinforcing portion, 3 is a current collector, 4 is a bolt, and 7 is a hole. In this embodiment, the light metal of the reinforcing portion 2 is impregnated in the hole 7 penetrating the sliding portion 1. Therefore, it can be expected that the connection between the sliding portion 1 and the reinforcing portion 2 is stronger than in the first embodiment. In addition, since the light metal penetrates through the inside of the sliding portion 1, it is excellent in conductivity. At this time, the size and shape of the hole 7 penetrating the sliding portion 1 are not particularly limited as long as the light metal of the reinforcing portion 2 can be sufficiently impregnated and the reinforcing effect can be exhibited. In the second embodiment, as in the first embodiment, the metal fiber 5 can be contained in the carbon of the sliding portion 1 or the fibrous reinforcing material 6 can be contained in the light metal of the reinforcing portion 2. .

FIG. 3 is a sectional view showing a third embodiment of the present invention. In FIG. 3, 1 is a sliding portion, 2 is a reinforcing portion, 3 is a current collector, 4 is a bolt, and 8 is a projection. In this embodiment,
Since the light metal of the reinforcing portion 2 is cast so as to hold the projection 8 of the sliding portion 1, a mechanical connection between the reinforcing portion 2 and the sliding portion 1 can also be expected. Rather, the connection between the reinforcing portion 2 and the sliding portion 1 can be expected to be strong. In the third embodiment, as in the first embodiment, the sliding portion 1
The metal fibers 5 may be contained in the carbon or the fibrous reinforcing material 6 may be contained in the light metal of the reinforcing portion 2.

FIGS. 4 and 5 are cross-sectional views of an apparatus for manufacturing the current collector slide plate of the present invention. The mold of the present embodiment is a split mold, and includes an upper mold 9 and a lower mold 10. The upper mold 9 is provided with an injection port 11 for injecting a light metal melt. Carbon or metal fiber-containing carbon serving as the sliding portion 1 is laid inside the lower die 10 of the above-mentioned die, and the upper die 9 is set and positioned thereon. If necessary, a fibrous reinforcing material 6 is laid between the carbon serving as the sliding portion 1 and the upper mold 9 as shown in FIG. Next, a molten metal of light metal is cast at a high pressure from the injection port 11,
The voids in the carbon and the inside of the fibrous reinforcing material 6 are impregnated and filled. After the cast light metal solidifies, a molded product in which the sliding portion 1 and the reinforcing portion 2 are integrally formed is taken out of the mold, and a screw hole for attaching the bolt 4 to the reinforcing portion 2 is formed.

As the light metal used for the reinforcing portion 2 in the above embodiment, for example, aluminum can be used, and as the fibrous reinforcing material 6, for example, alumina fiber, carbon fiber, potassium titanate whisker, or the like can be used. it can. As the metal fiber 5 inside the sliding portion 1, for example, iron, copper, aluminum, or the like can be used.

[0012]

The current collector plate obtained as described above has excellent lubricating properties and can be bolted to the current collector boat. Have. In addition, since brazing requiring a highly skilled technique is not performed, a product of stable quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a sectional view of a third embodiment of the present invention.

FIG. 4 is a cross-sectional view illustrating a method for manufacturing a current collector slide plate of the present invention.

FIG. 5 is a cross-sectional view illustrating a method for manufacturing a current collector slide plate of the present invention.

FIG. 6 is a diagram showing a conventional technique.

FIG. 7 is a diagram showing another conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sliding part 2 Reinforcement part 3 Current collecting boat 4 Bolt 5 Metal fiber 6 Fibrous reinforcing material 7 Hole 8 Projection 9 Upper mold 10 Lower mold 11 Gate 12 Saya 13 Row 14 Metal plate

──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. ⁶ Identification code FI C22C 1/10 C22C 1/10 E (72) Inventor Takehiko Akakabe 338-1 Ogino, Kamisakuyanagi, Yamato-shi, Kanagawa Prefecture 1 (72) Inventor: Shinsaku Matsuyama, 338-1 Ogino, Kamisakuyanagi, Yamato-shi, Kanagawa Prefecture Toyo Electric Manufacturing Co., Ltd.

Claims (5)

[Claims] 1. A current collector slide plate, comprising: a sliding portion formed of porous carbon having a void inside which a molten metal of light metal can be impregnated; and a reinforcing portion made of light metal, wherein a void in the carbon is provided. A current collector slide plate in which a light metal of the same material as the reinforcing portion is impregnated inside, and the sliding portion and the reinforcing portion are combined. 2. The current collector slide plate according to claim 1, wherein the sliding portion contains metal fibers in the porous carbon. 3. The current collector slide plate according to claim 1, wherein a fibrous reinforcing material is contained in the light metal of the reinforcing portion. 4. A porous carbon having a cavity capable of impregnating a molten metal of light metal therein is laid in a mold having a shape of a ground plate, and the molten metal of light metal is injected into the mold under pressure. A method for producing a current collector slide, comprising impregnating a light metal into a void of porous carbon and fusing the porous carbon and the light metal. 5. A metal mold having a shape of a ground plate, a porous carbon having a void capable of impregnating a molten metal of light metal therein and a fibrous reinforcing material are laid, and the molten metal of light metal is placed in the metal mold. A method for producing a current collector slide plate, comprising: injecting under pressure, impregnating a light metal into a space between the fibrous reinforcing material and the porous carbon, and fusing the porous carbon and the light metal.