JP2004155531A - Universal conveyance device and bearing for conveyance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a universal conveyance device being light in weight and having lubricity and excellent resistance to corrosion and vacuum, and a bearing for conveyance. <P>SOLUTION: A carbon bearing 1 is arranged on a base 5 such as a floor and a base. The carbon bearing 1 is provided with an operation ball 10, a plurality of auxiliary balls 11, a metallic case 15, and an edge cover 16. The operation ball 10 is stored in the spherical metallic case 15, and the plurality of auxiliary balls 11 are provided between the metallic case 15 and the operation ball 10. The operation ball 10 and the auxiliary balls 11 are carbon balls, are harder than the metallic case 15 and the edge cover 16, and have Shore hardness of 90 or more and bulk density of 2.0g/cm<SP>3</SP>or less and 1.4g/cm<SP>3</SP>or more. A stainless ball and other steel ball can be used as the auxiliary ball 11. A hollow ball such as the stainless ball and other steel ball may be used to reduce weight. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a directional control device for conveyance and a bearing for conveyance.
[0002]
[Prior art]
2. Description of the Related Art A transport directional device used for moving a heavy object such as an aircraft cargo for a short distance or rotating it to change its direction has been widely used.
[0003]
This type of swivel device is known as a bearing type with many bearings spread or a pneumatic type that lifts heavy objects with pneumatic pressure by arranging many air ejection holes. Is the most prevalent.
[0004]
[Problems to be solved by the invention]
However, since the conventional bearing type uses a steel ball bearing, there is a problem that in a vacuum or low-pressure environment such as an aircraft, galling occurs due to contact between the steel balls, resulting in poor operability. In addition, although weight reduction is required for aircraft, there has been a problem that weight reduction is difficult for steel balls. Further, in an environment where water drops or the like are exposed, there is a problem that corrosion of the steel ball occurs.
From the above viewpoint, there is a product using a plastic ball, but there are problems such as poor wear resistance and easy deformation.
An object of the present invention is to solve the above-mentioned problems of the prior art.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is directed to a transport directional device having a plurality of bearings arranged at predetermined positions, wherein a part or all of the bearings contact an object to be transported. A ball, a plurality of auxiliary balls for supporting the operating ball, and a case for holding the operating ball and the auxiliary ball, wherein the operating ball is a carbon ball, and is harder at a Shore hardness than the case; And a bulk density of 2.0 g / cm ³ or less and 1.4 g / cm ³ or more.
In the above configuration, it is possible to realize a device that is lightweight, maintains lubricity without oil, and has high vacuum resistance and corrosion resistance.
Further, a part of the bearing may have a working ball made of carbon, and the other bearing may be a steel bearing. Thereby, load resistance can be improved.
The auxiliary ball may be a carbon ball or a steel ball such as a stainless ball.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, a carbon bearing 1 and a metal bearing 2 are laid on a base 5 such as a floor or a base. In this embodiment, the carbon bearings 1 and the metal bearings 2 are arranged in every other row in a waveform, but the arrangement is not limited to this and any arrangement is possible.
[0007]
FIG. 2 shows the structure of the carbon bearing 1. The carbon bearing 1 includes an operating ball 10, a plurality of auxiliary balls 11, a metal case 15, and an edge cover 16.
The working ball 10 is a single ball and is housed in a spherical metal case 15, and has a structure in which a plurality of auxiliary balls 11 are interposed between the metal case 15 and the working ball 10. The edge cover 16 is mounted on the metal case 15 and holds the working ball 10 so as not to jump out. The end of the edge cover 16 is bent to form a bent portion 60 so that the working ball 10 is not damaged.
The working ball 10 and the auxiliary ball 11 are made harder than the metal case 15 and the edge cover 16 and are hardened by Shore hardness. If the metal ball 15 is not harder than the edge cover 16, the working ball 10 and the auxiliary ball 11 may cause abnormal friction.
[0008]
The working sphere 10 and the auxiliary sphere 11 are carbon spheres in which 90% or more of the components are made of carbon, and are harder than the metal case 15 and the edge cover 16 and have a Shore hardness of 90 or more as described above.
If it is less than 90, abrasion is promoted by dry contact friction with the auxiliary ball 11, and the operating life is shortened. When a stainless steel ball or another steel ball is used as the auxiliary ball 11 as described later, it is desirable that the working ball 10 has a Shore hardness of 110 or more.
[0009]
The working balls 10 and the auxiliary balls 11 have a bulk density of 2.0 g / cm ³ or less and 1.4 g / cm ³ or more. When the bulk density is less than 1.4 g / cm ³ , internal pores increase and strength is reduced. There is a danger of damage during use due to reduced strength. On the other hand, if the bulk density exceeds 2.0 g / cm ³ , the graphite crystals will develop too much, causing a decrease in strength and a danger of breakage during use.
[0010]
In the above configuration, a stainless steel ball or another steel ball can be used as the auxiliary ball 11. In addition, a hollow ball of a stainless steel ball or another steel ball may be used for weight reduction. As described above, when a stainless steel ball or another steel ball is used as the auxiliary ball 11, it is desirable that the working ball 10 has a Shore hardness of 110 or more.
[0011]
The required number of carbon bearings 1 having the above configuration are arranged on the base 5 as shown in FIG. The arrangement may be a regular arrangement or an irregular arrangement. Further, it is also possible to constitute so that the entire carbon bearing 1 advances and retreats from the base 5.
[0012]
In the example of FIG. 1, the carbon bearing 1 and the metal bearing 2 are used in combination to improve the load resistance. However, it is needless to say that the carbon bearing 1 alone can constitute the device. . Further, it is also possible to use a bearing other than the metal bearing 2 if necessary.
[0013]
FIG. 3 shows the configuration of another carbon bearing 1 '.
This carbon bearing 1 'is provided with a spacer ring 17 inside the edge cover 16'. The spacer ring 17 is made of PTFE, and is configured to protrude inside the edge cover 16 ′ and contact the working ball 10 so that the edge cover 16 ′ does not directly contact the working ball 10. With this configuration, it is possible to prevent wear of the working ball 10 due to contact with the edge cover 16 '.
[0014]
In the above configuration, the carbon bearing 1 is lightweight, has no oil, has lubricity, has excellent corrosion resistance and vacuum resistance, and is most suitable for applications such as aircraft.
[0015]
【The invention's effect】
As described above, according to the directional control device and the bearing of the present invention, there is an effect that it is lightweight, has no oil, has lubricity, and has excellent corrosion resistance and vacuum resistance.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing one embodiment of the present invention.
FIG. 2 is a sectional view showing a working ball 10 according to the embodiment of the present invention.
FIG. 3 is a sectional view showing another working ball 10 ′ according to the embodiment of the present invention.
[Explanation of symbols]
1: carbon bearing, 2: metal bearing, 5: base, 10: working ball, 11: auxiliary ball, 15: metal case, 16: edge cover, 17: spacer ring, 60: bent portion.

Claims (5)

A transport directional device comprising a plurality of bearings disposed at predetermined locations;
Part or all of the bearing,
An operating ball that comes into contact with the transferred object,
A plurality of auxiliary spheres supporting the working sphere,
A case for holding the working ball and the auxiliary ball;
The working ball is a carbon ball, having a Shore hardness higher than the case, a Shore hardness of 90 or more, and a bulk density of 2.0 g / cm ³ or less and 1.4 g / cm ³ or more;
Directional device for transport. A transport directional device comprising a plurality of bearings disposed at predetermined locations;
A part of the bearing has a steel working ball on which the object is placed, and a part of the bearing has a carbon operating ball on which the object is placed;
A bearing having an operating ball made of carbon,
A plurality of auxiliary spheres supporting the working sphere,
A case for holding the working ball and the auxiliary ball,
The carbon working ball is harder in Shore hardness than the case, has a Shore hardness of 90 or more, and a bulk density of 2.0 g / cm ³ or less and 1.4 g / cm ³ or more;
Directional device for transport. The auxiliary sphere is a carbon sphere,
The transfer direction control device according to claim 1 or 2. The auxiliary ball is a steel ball,
The transfer direction control device according to claim 1 or 2. An operating ball that comes into contact with the transferred object,
A plurality of auxiliary spheres supporting the working sphere,
A case for holding the working ball and the auxiliary ball;
The working ball is a carbon ball,
Each of the plurality of auxiliary spheres is one of a carbon sphere or a steel sphere,
The working ball has a Shore hardness higher than the case, a Shore hardness of 90 or more, and a bulk density of 2.0 g / cm ³ or less and 1.4 g / cm ³ or more;
Bearings for transport.

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