# US 10,309,448 B2 · Pivoting bearing for two connecting rods in at least one reciprocating piston > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,448 B2 - Document ID: US10309448B2 - Status: Granted - Kind: B2 - Application number: 15/850,134 - Filed: 2017-12-21 - Published: 2018-06-28 - Granted: 2019-06-04 - Earliest claimed: 2016-12-22 - Assignees: Neander Motors AG - Applicants: Neander Motors AG - Inventors: Claus Bruestle - Web page: https://patentgrep.com/patent/US10309448B2 ## CPC - F16C 9/04: Connecting-rod bearings; Attachments thereof - F01B 1/10: with more than one main shaft, e.g. coupled to common output shaft - F02B 75/065: {with double connecting rods or crankshafts} - F02B 75/32: Engines characterised by connections between pistons and main shafts and not specific to preceding main groups - F16H 57/12: Arrangements for adjusting or for taking-up backlash not provided for elsewhere - F16J 1/14: with connecting-rods, i.e. pivotal connections - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F01B: MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES (of rotary-piston or oscillating-piston type F01C; of non-positive-displacement type F01D; internal-combustion engines F02B; combustion-product engine plants F02G; machines or engines, other than of positive-displacement type, for liquids F03B; positive-displacement engines driven by liquids F03C; wind motors F03D; positive-displacement machines for liquids F04B; rotary-piston, or oscillating-piston, positive-displacement machines for liquids F04C) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F16H: GEARING - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS ## Abstract A pivoting bearing is provided for two connecting rods in a reciprocating piston of an internal combustion engine having two crankshafts which are driven via the reciprocating piston and the connecting rods. The pivoting bearing is received by piston bores of the piston and has gudgeon pin bores for mounting gudgeon pins for gudgeon pin eyes of the connecting rods. The pivoting bearing has radial bearing regions which are provided with the pin bores, are arranged on both sides of a center longitudinal axis of the reciprocating pistons, and delimit the gudgeon pin eyes in a manner which forms an intermediate space. To optimize the pivoting bearing, the bearing regions of the pivoting bearing are configured as cylinder bodies with a cup-like cross section, of which each cylinder body has a base wall and a bearing ring shell. The base walls of the two cylinder bodies extend at a spacing from one another, and the bearing ring shells which surround the base walls are guided away from the base walls in opposite directions. A plurality of connecting stubs run between the base walls in such a way that two connecting stubs are arranged on a side of the pivoting bearing, which side faces a piston crown, and extend at a relatively small spacing from ring sections of the gudgeon pin eyes, and in such a way that the connecting stubs and the ring sections have lubricating structures for lubricating connecting rod bearings of the connecting rods. ## Claims ### Claim 1 A pivoting bearing in a reciprocating piston of an internal combustion engine having two crankshafts driven via the reciprocating piston, the pivoting bearing comprising: two connecting rods by which the two crankshafts are respectively driven via the reciprocating piston, wherein the pivoting bearing is received by piston bores of the piston and has pin bores for mounting gudgeon pins for gudgeon pin eyes of the connecting rods, the pivoting bearing has radial bearing regions which are provided with the pin bores, are arranged on both sides of a center longitudinal axis of the reciprocating piston, and delimit the gudgeon pin eyes in a manner forming an intermediate space, the bearing regions of the pivoting bearing are configured as cylinder bodies with a cup-shape cross section, of which each cylinder body has a base wall and a bearing ring shell, the base walls of the two cylinder bodies extend at a spacing from one another, the bearing ring shells which surround the base walls are guided away from the base walls in opposite directions, a plurality of connecting stubs run between the base walls such that two connecting stubs are arranged on a side of the pivoting bearing that faces a piston crown and extend at a relatively small spacing from ring sections of the gudgeon pin eyes, and lubricating structures are provided in the connecting stubs and the ring sections for lubricating connecting rod bearings of the connecting rods. ### Claim 2 (depends on 1) The pivoting bearing as claimed in claim 1, wherein two connecting stubs are of annular configuration and are adapted to a shape profile of the ring sections of the gudgeon pin eyes. ### Claim 3 (depends on 2) The pivoting bearing as claimed in claim 2, wherein through openings which face one another in the two connecting stubs and the ring sections for the entry of lubricant are arranged in bearing points between the pin bores and the gudgeon pins. ### Claim 4 (depends on 3) The pivoting bearing as claimed in claim 3, wherein the through openings have an oval shape in the two connecting stubs and a circular shape in the ring sections. ### Claim 5 (depends on 4) The pivoting bearing as claimed in claim 4, wherein the through openings of the connecting stubs and of the ring sections have common center longitudinal planes. ### Claim 6 (depends on 1) The pivoting bearing as claimed in claim 1, wherein lubricants of the lubrication pass firstly by way of roving particles of aerosol-containing gases in a crankcase of the internal combustion engine and secondly by devices of the crankshafts and the connecting rods into the intermediate space and/or to the through openings. ### Claim 7 (depends on 3) The pivoting bearing as claimed in claim 3, wherein lubricants of the lubrication pass firstly by way of roving particles of aerosol-containing gases in a crankcase of the internal combustion engine and secondly by devices of the crankshafts and the connecting rods into the intermediate space and/or to the through openings. ### Claim 8 (depends on 5) The pivoting bearing as claimed in claim 5, wherein lubricants of the lubrication pass firstly by way of roving particles of aerosol-containing gases in a crankcase of the internal combustion engine and secondly by devices of the crankshafts and the connecting rods into the intermediate space and/or to the through openings. ### Claim 9 (depends on 6) The pivoting bearing as claimed in claim 6, wherein the devices comprise firstly recesses which are arranged on opposite outer sides of the crank pin eyes, and secondly guiding apparatuses which extend between the crank pin eyes and the connecting rod eyes, via which guiding apparatuses lubricants are moved into the intermediate space and/or the through openings. ### Claim 10 (depends on 9) The pivoting bearing as claimed in claim 9, wherein the recesses are longitudinal grooves formed on opposite longitudinal sides of connecting rod shanks of the connecting rods, which longitudinal grooves extend between the crank pin eyes and the gudgeon pin eyes. ### Claim 11 (depends on 10) The pivoting bearing as claimed in claim 10, wherein the devices are configured by way of longitudinal bores in the connecting rod shanks of the connecting rods between crank pin eyes and the gudgeon pin eyes. ### Claim 12 (depends on 9) The pivoting bearing as claimed in claim 9, wherein the devices are configured by way of longitudinal bores in the connecting rod shanks of the connecting rods between crank pin eyes and the gudgeon pin eyes.