JPS639135B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an improved half-split plain bearing that is most suitable for use in vehicles, and relates to a method of manufacturing a lightweight, simple-structured and inexpensive shaft bearing.

Vehicle shaft bearings have traditionally been manufactured by machining cast or forged products, but due to the recent trend toward smaller and lighter vehicle parts, a lightweight and simple manufacturing method for shaft bearings has been developed. is desired.

In order to meet this demand, it is an object of the present invention to provide a method for manufacturing a shaft bearing that is lightweight, simple, and mass-producible, that is, is easy.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of manufacturing a shaft bearing according to the present invention will be explained below with reference to the drawings.

1 to 4 show the steps of the manufacturing method according to the first embodiment of the present invention. First, a metal plate 1 is prepared as shown in FIG. metal plate 1
Although a pair of metal plates 1 are prepared, only one metal plate 1 is shown in FIGS. 1 to 3. The metal plate 1 only needs to be bendable, but usually a steel plate is used.

As shown in FIG. 2, the metal plate 1 is provided with a track-shaped hole 2 having a shape in which semicircular holes 2b are connected to both ends of a rectangular hole 2a. This drilling process is usually performed by punching using a press, but other processes such as mechanical cutting may also be used.

Next, the metal plate 1 provided with the track-shaped hole is located at the boundary line (second
Fold the peripheral portions 1b of the semicircular holes 2b at both ends to the same side along the imaginary line marked with A in the figure to form a half-split shaft bearing body as shown in Figure 3. Form. A pair of half-split bodies formed according to FIGS. 1 to 3 is prepared.

Next, a pair of half-split bodies made of bent metal plates are assembled so that the semicircular holes 2B at both ends of each half-split body butt against each other to form a perfectly circular hole, as shown in FIG. Form the shaft bearing shown in .
The pair of halves may be temporarily assembled as necessary, subjected to finishing counterbore processing, and joined by bolts that can be disassembled, or they may be joined together by welding. good. Further, the welding may be continuous or spot welding. Further, the shaft bearing body may be machined to have a perfectly circular portion formed by abutting the semicircular holes 2b, if necessary.

FIG. 5 shows a shaft bearing manufactured by the manufacturing method according to the second embodiment of the present invention, and the parts based on the first embodiment are given the same reference numerals and explanations are omitted, and different parts are omitted. The process will be explained only for.

In the second embodiment, in the bending process along the boundary line A between the rectangular hole 2a and the semicircular holes 2b at both ends, the edge of the peripheral portion 1b of the semicircular hole 2b is bent to the same side. is further bent toward the other peripheral portion 1b, and the tips are brought together and welded together. By doing so, the rigidity of the bearing body can be improved. In addition, if necessary, the peripheral parts 1 at both ends
A lightweight reinforcing member 3 such as synthetic resin may be filled in the space between b and 1b, and the stiffness of the bearing body can be further increased by the filling material 3.

In addition, in FIG. 5, bolt holes 4 are used to connect the pair of halves using bolts and nuts.
A case is shown in which holes 4 are provided on both sides 1a of a rectangular hole 2a, but in the case of bolt fastening in this way, the bolt holes 4 should be drilled at the same time as the track-shaped hole 2 is punched. Bye.

FIG. 6 shows a shaft bearing manufactured by the manufacturing method according to the third embodiment of the present invention. The parts based on the first embodiment are designated by the same reference numerals and explanations are omitted, and different parts are omitted. The process will be explained only for.

In the third embodiment, a circular tubular bush 5 extending across perfect circular holes at both ends is attached to a shaft bearing body made of a combination of halves. This bush 5 is fixed to the main body portion of the shaft bearing by welding. In addition, if the halves are not welded but are separably joined by bolts, the circular tubular bushing is divided into two semicircular tubular bushes, and the semicircular bushings are welded to the half bodies in advance by welding. It may be fixed.

When using the method of manufacturing a bearing body of the present invention, the following various functions and effects can be obtained.

First, since steel plates are used as the material, the material strength is increased compared to cast and forged products. That is, in order to obtain a shaft bearing with the same strength and rigidity, a thinner material is required, and the weight of the shaft bearing can be reduced by the amount that can be hollowed out. Furthermore, by filling the bearing with a lightweight material and by butt welding the tips of the bent portions together, it is possible to further increase the strength of the shaft bearing while maintaining the advantage of being lightweight.

Next, the manufacturing method of the present invention can be formed by punching and bending a metal plate, and does not involve casting and forging unlike the manufacturing of conventional products, so the manufacturing method is extremely simple. In addition, since casting and forging processing is eliminated, mass productivity is extremely high.

Furthermore, when using a joint bushing of a circular tubular bushing or a semicircular tubular bushing as in the third embodiment, machining of the bearing surface, which was necessary in the production of conventional cast and forged bearing bodies, is almost unnecessary. Since the tubular bush itself can be mass-produced, manufacturing can be further simplified and facilitated.

Furthermore, the bushing can be made of a different material from the half-split body, increasing the degree of freedom in design and manufacturing. That is, ceramic, rubber-like elastic material, plastic, bearing metal, etc. can be used for the bush, and a bearing body can be provided depending on the purpose of use.

[Brief explanation of the drawing]

1 to 4 are perspective views of a shaft bearing body manufactured according to a first embodiment of the manufacturing method of a shaft bearing body of the present invention, during the manufacturing process, and FIG. 1 shows the stage of manufacturing a metal plate;
Figure 2 shows the stage in which the track-shaped hole has been drilled, and the stage in which the track-shaped hole is drilled.
The figure shows the stage of folding, and FIG. 4 shows the stage of assembling a pair of half-split bodies formed by folding. FIG. 5 is a perspective view of a half body of a shaft bearing manufactured by a second embodiment of the method of the present invention. FIG. 6 is a perspective view of a shaft bearing manufactured by a third embodiment of the method of the present invention. 1...Metal plate, 2...Track-shaped hole, 2a...
Rectangular hole, 2b...semicircular hole.

Claims (1)

[Claims] 1. A track-shaped hole is formed in each of the pair of metal plates, and the track-shaped hole has a shape in which a semicircular hole is connected to both ends of a rectangular hole, and Bend the peripheral parts of the semicircular holes at both ends to the same side along the boundary line with the circular hole, and fold the pair of metal plates so that the semicircular holes are butted together to form a perfect circular hole. A method for manufacturing a shaft bearing, the method comprising: forming a shaft bearing in combination with the above.