Piston bolt

Patent metadata

Field	Value
Publication number	US-10281041-B2
Application number	US-201615286314-A
Country	US
Kind code	B2
Filing date	Oct 5, 2016
Priority date	Oct 6, 2015
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A piston bolt may include an axial opening and at least one reinforcement rib may be arranged on an inner surface of the opening. The at least one reinforcement rib may be helical in conformation or may include a plurality of reinforcement ribs forming a honeycomb pattern.

First claim

The invention claimed is:

1. A piston bolt comprising an axial opening and at least one reinforcement rib arranged on an inner surface of the opening, wherein:
the at least one reinforcement rib is helical in conformation and includes at least two helical reinforcement ribs having helix angles oriented in opposing directions.

2. The piston bolt according to claim 1 , wherein the at least two helical reinforcement ribs run in opposite directions.

3. The piston bolt according to claim 1 , wherein the at least one reinforcement rib has one of a trapezoidal, a rectangular, a circular segment, and a sinusoidal cross section.

4. The piston bolt according to claim 1 , wherein a ratio of a height of the at least one reinforcement rib to a residual wall thickness of the piston bolt is between 0.1 and 2.0.

5. The piston bolt according to claim 4 , wherein a ratio of a height of the at least one reinforcement rib to a residual wall thickness of the piston bolt is between 0.3 and 0.7.

6. The piston bolt according to claim 1 , wherein a ratio of a height of the at least one reinforcement rib to a width of the reinforcement rib is between 0.1 and 2.0.

7. The piston bolt according to claim 6 , wherein a ratio of a height of the at least one reinforcement rib to a width of the reinforcement rib is between 0.1 and 0.3.

8. The piston bolt according to claim 1 , wherein one of:
the opening is formed as a continuous opening running entirely through the piston bolt, or
a middle web is present, which separates two openings from each other, each one formed as a blind hole.

9. An internal combustion engine comprising at least one piston bolt having an axial opening and at least one reinforcement rib arranged on an inner surface of the opening, wherein
the at least one reinforcement rib includes a plurality of reinforcement ribs forming a honeycomb pattern.

10. The internal combustion engine according to claim 9 , wherein the plurality of reinforcement ribs forming the honeycomb pattern vary in terms of at least one of height and width over a length of the opening.

11. The internal combustion engine according to claim 9 , wherein the at least one reinforcement rib has one of a trapezoidal, a rectangular, a circular segment, and a sinusoidal cross section.

12. The internal combustion engine according to claim 9 , wherein one of:
the opening is formed as a continuous opening running entirely through the piston bolt, or
a middle web is present, which separates two openings from each other, each one formed as a blind hole.

13. The internal combustion engine according to claim 9 , wherein the plurality of reinforcement ribs includes annular reinforcement ribs and axial reinforcement ribs, which intersect and together form the honeycomb pattern.

14. The internal combustion engine according to claim 9 , wherein the plurality of reinforcement ribs forming the honeycomb pattern vary in terms of at least one of height and width over a length of the opening.

15. A piston bolt comprising an axial opening and at least one reinforcement rib arranged on an inner surface of the opening, wherein:
the at least one reinforcement rib includes a plurality of reinforcement ribs including annular reinforcement ribs and axial reinforcement ribs, which intersect and together to form a honeycomb pattern.

16. The piston bolt according to claim 15 , wherein the plurality of reinforcement ribs forming the honeycomb pattern vary in terms of at least one of height and width over a length of the opening.

17. The piston bolt according to claim 15 , wherein the at least one reinforcement rib has one of a trapezoidal, a rectangular, a circular segment, and a sinusoidal cross section.

Assignees

• Mahle Int Gmbh

Inventors

• Lochmann Roland

Classifications

• F16B7/182

  for coaxial connections of two rods or tubes · CPC title

• F02F3/00

  Pistons · CPC title

• F16J1/18

  Securing of gudgeon-pins · CPC title

• F16J1/16 Primary

  with gudgeon-pin; Gudgeon-pins · CPC title

• F16B7/06

  Turnbuckles (for cables, ropes, or wire F16G11/12) · CPC title