Crankshaft pendulum assembly having kidney-shaped track
US-9512897-B2 · Dec 6, 2016 · US
Crankshaft for reciprocating engine
US2016258476A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016258476-A1 |
| Application number | US-201415028445-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 14, 2014 |
| Priority date | Oct 16, 2013 |
| Publication date | Sep 8, 2016 |
| Grant date | — |
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Abstract
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A crankshaft includes: journals that define a central axis of rotation; crank pins that are eccentric with respect to the journals; and crank arms for connecting the journals and the crank pins, wherein each of the crank arms or at least one of the crank arms integrally includes a counterweight. The crank arms have a recess in a surface adjacent to a corresponding one of the journals, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region. With this configuration, it is possible to provide a crankshaft which has reduced weight and increased torsional rigidity in combination with increased flexural rigidity.
First claim
Opening claim text (preview).
1 . A crankshaft for a reciprocating engine, the crankshaft configured to be mounted in a reciprocating engine, the crankshaft comprising: journals that define a central axis of rotation; crank pins that are eccentric with respect to the journals; and crank arms, each of the crank arms connecting a corresponding one of the journals to a corresponding one of the crank pins, wherein each of the crank arms or at least one of the crank arms integrally includes a counterweight, and wherein the crank arms have a recess in a surface adjacent to the corresponding one of the journals, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region, so that, in the crank arm, a central region inward of the recess is thick. 2 . The crankshaft for a reciprocating engine according to claim 1 , wherein the recess extends to a portion of the peripheral region, the portion corresponding to an area in the corresponding one of the crank pins, the area extending from an axis of the crank pin to an eccentrically top portion of the crank pin. 3 . The crankshaft for a reciprocating engine according to claim 2 , wherein the recess extends to an area of the peripheral region, the area corresponding to the top portion. 4 . The crankshaft for a reciprocating engine according to claim 2 , wherein the recess extends to a side area of the peripheral region. 5 . The crankshaft for a reciprocating engine according to claim 2 , wherein the recess extends to two side areas of the peripheral region, the recess being symmetrical with respect to a line connecting an axis of the corresponding one of the journals to the axis of the corresponding one of the crank pins. 6 . The crankshaft for a reciprocating engine according to claim 1 , wherein, of all the crank arms, a crank arm not having the counterweight has a recess in a surface adjacent to the corresponding one of the crank pins, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region. 7 . The crankshaft for a reciprocating engine according to claim 2 , wherein, of all the crank arms, a crank arm not having the counterweight has a recess in a surface adjacent to the corresponding one of the crank pins, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region. 8 . The crankshaft for a reciprocating engine according to claim 3 , wherein, of all the crank arms, a crank arm not having the counterweight has a recess in a surface adjacent to the corresponding one of the crank pins, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region. 9 . The crankshaft for a reciprocating engine according to claim 4 , wherein, of all the crank arms, a crank arm not having the counterweight has a recess in a surface adjacent to the corresponding one of the crank pins, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region. 10 . The crankshaft for a reciprocating engine according to claim 5 , wherein, of all the crank arms, a crank arm not having the counterweight has a recess in a surface adjacent to the corresponding one of the crank pins, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region.
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- What does patent US2016258476A1 cover?
- A crankshaft includes: journals that define a central axis of rotation; crank pins that are eccentric with respect to the journals; and crank arms for connecting the journals and the crank pins, wherein each of the crank arms or at least one of the crank arms integrally includes a counterweight. The crank arms have a recess in a surface adjacent to a corresponding one of the journals, the reces…
- Who is the assignee on this patent?
- Nippon Steel & Sumitomo Metal Corp
- What technology area does this patent fall under?
- Primary CPC classification F16C3/20. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Sep 08 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).