Balancer apparatus for engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTamotsu Kamiya, Makoto Ishikawa, Masaaki Konishi, Keisuke Suga
Life of this patent
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Abstract
A balancing apparatus for suppressing engine vibrations is disclosed. The balancer apparatus includes a helical drive gear that is rotatable together with the crank shaft. A first driven helical gear for is driven by the drive gear and a second driven helical gear is driven by the first driven gear. Support shafts are provided to carry each of the driven gears and a weight associated therewith. A case is provided about the driven gears and carries the support shafts.
Claims7
An engine including a balancer apparatus for suppressing vibrations in the engine, wherein the engine has a rotatable crankshaft and a plurality of pistons and cylinders for causing rotation of the crankshaft, the balancer apparatus comprising:
- a drive gear mounted substantially at the center of the longitudinal direction of the crank shaft for the rotation with the crank shaft, the drive gear being a helical gear;
- and
- a first driven gear for supporting a first weight when engaged with a drive gear, the first driven gear also being a helical gear;
- a first support shaft for rotatably supporting the first driven gear and the first weight;
- a case for non-rotatably supporting the first support shaft, the case having a first wall that receives the thrust induced by rotation of the drive gear;
- a first oil passage for delivering lubricating oil to the junction between the first weight and the first support shaft;
- and
- a guide passage in communication with the oil passage, for delivering lubrication oil to the portion of the first wall that receives the thrust induced by rotation on the drive gear.
Dependencies are inferred from the claim text.