Crankshaft
AssigneeHonda Motor Co., Ltd.
InventorMitsuyoshi Kamiya
Life of this patent
Estimating the term…
Abstract
A crankshaft of an internal combustion engine includes a crank journal, a crank pin, and a crank web. The crank journal is to be supported by a crankcase and to be rotatable around a crankshaft axis. The crank pin has a crank pin axis substantially parallel to the crankshaft axis to support a connecting rod which is rotatable around the crank pin axis. The crank web is provided between the crank journal and the crank pin to connect the crank journal and the crank pin. The crank web has a hole which extends from one side face of the crank web and passes in a vicinity of a connection section between the crank pin and the crank web when viewed in an axial direction along the crankshaft axis.
Claims25
A crankshaft of an internal combustion engine, the crankshaft comprising:
- crank journals pivotally supported by a crankcase and configured to rotate about a crankshaft axis;
- crank pins adapted to pivotally support connecting rods;
- and
- crank webs that connect the crank journals and the crank pins, each crank web disposed between one of the cranks journals and one of the crank pins,
- wherein holes are provided in the crank webs, each hole being disposed between one of the crank journals and one of the crank pins, and
- the holes run from respective side faces of the crank webs, the side faces of each crank web being opposed to each other in a direction orthogonal to the crankshaft axis as viewed from the crankshaft axis, such that the holes pass adjacent to connection sections between the crank pins and the crank webs.
A crankshaft of an internal combustion engine, comprising:
- a crank journal configured to be supported by a crankcase and configured to rotate around a crankshaft axis;
- a crank pin having a crank pin axis parallel to the crankshaft axis, the crank pin configured to support a connecting rod which is rotatable around the crank pin axis;
- and
- a crank web provided between the crank journal and the crank pin to connect the crank journal and the crank pin, the crank web having a hole disposed between the crank journal and the crank pin, the hole extending from one side face of the crank web in a direction orthogonal to the crankshaft axis and passing in a region that is adjacent to a connection section between the crank pin and the crank web as viewed in an axial direction along the crankshaft axis,
- wherein the hole is spaced from an axial center of the crank web in which the hole is disposed, as measured in the axial direction.
A crankshaft of an internal combustion engine, the crankshaft comprising:
- crank journals pivotally supported by a crankcase;
- crank pins adapted to pivotally support connecting rods;
- and
- crank webs adapted to connect the crank journals and the crank pin, wherein holes are provided in the crank webs,
- the holes run from respective side faces of the crank webs as viewed from an axial direction of the crankshaft, and pass adjacent to connection sections between the crank pin and the crank webs,
- a crank weight section is formed monolithically on the opposite side of the crank pin with the axial line of the crankshaft sandwiched therebetween in each of the crank webs,
- bulging portions are formed in the crank weight section in such a manner as to extend in the shape of an arc on both lateral sides of the axial line of the crankshaft and extend to the lateral sides of the crank pin more than the connection sections between the crank pin and the crank webs, and
- the holes penetrate the bulging portions.
A crankshaft of an internal combustion engine, comprising:
- a crank journal configured to be supported by a crankcase and configured to rotate around a crankshaft axis;
- a crank pin having a crank pin axis parallel to the crankshaft axis, the crank pin configured to support a connecting rod which is rotatable around the crank pin axis;
- and
- a crank web provided between the crank journal and the crank pin to connect the crank journal and the crank pin, the crank web having a hole which extends from one side face of the crank web and passes in a region that is adjacent to a connection section between the crank pin and the crank web as viewed in an axial direction along the crankshaft axis,
- wherein a crank weight section is provided monolithically on an opposite side of the crank pin with respect to an axial line of the crankshaft sandwiched between the crank pin and the crank weight section in the crank web,
- wherein a bulging portion is provided in the crank weight section in such a manner as to extend in a shape of an arc on both lateral sides of the axial line of the crankshaft and extend to lateral sides of the crank pin more than the connection section between the crank pin and the crank web, and
- wherein the hole penetrates the bulging portion.
Dependencies are inferred from the claim text.