Bearing structure, and its manufacturing method

Abstract

Provided is a bearing structure, which can be simply worked and lowered in its manufacturing cost. The bearing structure (1) comprises a housing including a first housing portion (13) having a recess of a substantially semicircular section and a second housing portion (14) having a recess of a substantially semicircular section and forming a supporting hole (16) of a substantially circular section together with the recess (13a) of the first housing portion (13). Further comprised are two halved roller bearings (2) having a shaft (12) fitted therein. The two halved roller bearings (2) include one set of two halved outer rings (3a and 3b) arranged closely in the supporting hole (16) of that housing, a plurality of rolling elements (4) arranged to roll on the individual inner sides faces of the two halved outer rings (3a and 3b), and one set of two halved retainers (5a and 5b) for retaining the individual rolling elements (4) arranged substantially equidistantly in the circumferential direction. The internal diameter of the supporting hole (16) in the direction of the mating faces of the housing portions is made larger than the internal diameter in the direction displaced by 90 degrees from that of the mating faces.

Description

Technical field [0001] The invention relates to a bearing structure and a manufacturing method thereof. In more detail, it relates to a bearing structure composed of a split type rolling bearing suitable for supporting shafts such as a crankshaft and a camshaft of an engine, and a housing supporting the rolling bearing, and a manufacturing method thereof. Background technique [0002] In engines such as automobiles and ships, the bearings that support the crankshaft that converts the reciprocating motion of the piston into rotational motion are arranged between the counterweight or between the counterweight and the large end of the connecting rod, so it is divided into two parts in the circumferential direction. Part of the split bearing (half bearing). [0003] The above-mentioned support bearings have used sliding bearings in the past. However, in recent years, due to the increasing demand for engines with less fuel consumption, in order to reduce the rotation loss, the use of s...

AI Technical Summary

Problems solved by technology

[0026] In the bearing described in Patent Document 4, it is necessary to form an inclined surface on the inner peripheral surface side of the divided surface of the outer ring, and there is a problem that the processing is complicated and thus the manufacturing cost increases.

[0027] In addition, in the bearing described in Patent Document 5, the outer ring needs to be thickened, and hardening such as quenching and grinding is required, and the processing is complicated, resulting in an increase in manufacturing cost.

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