Internal-combustion engines – Transmission mechanism from piston – Crankshaft and connecting rod
Patent
1998-12-11
2000-10-17
Wolfe, Willis R.
Internal-combustion engines
Transmission mechanism from piston
Crankshaft and connecting rod
1231971, 1231972, 1231936, F02B 7532, F02F 300
Patent
active
061315443
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to mechanical engineering, particularly to engine designs, and, more particularly, to a connecting rod and piston assembly for an internal combustion engine.
BACKGROUND OF THE INVENTION
In a conventional connecting rod and piston assembly, the piston having a crown, a skirt and mountings is connected to the connecting rod through a gudgeon pin. The connecting rod is installed on a central cylindrical portion of the gudgeon pin whose ends are received in holes provided in the mountings which are urged to the crown by threaded members (see GB, A1, 1 043 021).
A disadvantage of the conventional assembly is its relatively great weight and dimensions.
GB, A1, 2 163 520 discloses another conventional connecting rod and piston assembly for an internal combustion engine, which comprises a piston in a cylinder, the piston being constructed with a head portion, a skirt portion and a mounting member, and connected to the connecting rod via a gudgeon pin. The connecting rod is mounted on a central cylindrical portion of the gudgeon pin. The mounting member surface remote from the head is provided with recesses having open cylindrical surfaces for matching and locating the ends of the gudgeon pin, the ends being urged to the head by threaded members.
The above prior art, most closely approaching the present invention, also suffers great weight and dimensions and, consequently, a poor reliability.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a lighter weight connecting rod and piston assembly having lesser dimensions and improved reliability.
The object of the invention is attained by providing a connecting rod assembly which has fixing plates with openings in them, the ends of a piston pin being made in the shape of semi-cylindrical elements which are coaxial to the central cylindrical portion of the piston pin and have planar surfaces parallel to the longitudinal axis of the piston pin, the fixing plates lie against the planar surfaces of the piston pin ends and contact them, and threaded members are arranged within the openings in the fixing plates symmetrically about the piston pin axis.
The object of the invention is also attained by making a support member in the form of a carriage with Y-shaped bearings and rolling members disposed in the rocking plane of the connecting rod at both sides of the piston pin, the skirt having cutouts wherein the rolling members are mounted on shafts in the Y-shaped bearings so as to contact the cylinder wall.
At least one pair of rolling members can be mounted at one side of the piston pin.
The shafts of the pair of rolling members can be disposed in parallel.
A distance between rotation axes of the pair of rolling members can be less than a diameter of the rolling members.
One of the pair of rolling members can be provided with a radial annular recess to receive the other rolling member.
The connecting rod and piston assembly can be provided with embedded nuts, the head having radial grooves to receive the nuts into which the threaded members are screwed.
The radial grooves can be made in the form of an inner annular bore arranged in the plane parallel to the longitudinal axis of the piston pin, the nuts being made in the form of ring segments.
The larger diameter portion of the annular surface of the nuts can be arranged in the annular bore, while the other part thereof mates the support member surface and is urged thereto by the threaded members.
The head can be provided with a centering cylindrical bore of less diameter than the annular bore, the carriage, at the head side, having a centering flange mated with the cylindrical surface of the centering bore in the head.
The head can be provided, at the support member side, with blind holes receiving the threaded member ends protruding beyond the surface of the embedded nuts.
The diameter of the central cylindrical portion of the piston pin may exceed the diameter of the cylinder segments.
BRIEF DESCRIPTION OF THE DRAWINGS
Th
REFERENCES:
patent: 5092290 (1992-03-01), Bartkowicz
patent: 5651304 (1997-07-01), Allsop
Tyo Genya
Zakharov Evgeny Nikolaevich
Hairston Brian
Wolfe Willis R.
LandOfFree
Connecting-rod and piston assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Connecting-rod and piston assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Connecting-rod and piston assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-458898