# US 2014/0154072 A1 · Support for rolling bearings > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154072 A1 - Document ID: US20140154072A1 - Status: Published application - Kind: A1 - Application number: 14/067,889 - Filed: 2013-10-30 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Applicants: Agilent Technologies, Inc. - Inventors: Carmelo Quartarone; Luca Campagna; Alessandro Follo - Web page: https://patentgrep.com/patent/US20140154072A1 ## CPC - F16C 33/583: {Details of specific parts of races} - F04D 19/042: {Turbomolecular vacuum pumps} - F04D 29/0563: {Bearings cartridges} - F16C 27/066: {Ball or roller bearings} - F16C 33/581: {integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels} - F16C 35/045: {with a radial flange to mount the housing} - F16C 35/077: between housing and outer race ring - F16C 19/04: for radial load mainly - F16C 2202/32: Conductivity - F16C 2360/45: Turbo-molecular pumps - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract The present invention relates to a support (1) for rolling bearings, which advantageously finds application, among others, in the technical field of rotary vacuum pumps, such as turbomolecular vacuum pumps. According to the invention, the support for rolling bearings (1) comprises a first inner annular shell (3) made of metal and intended to be mounted on the outer surface of a rolling bearing, a second outer annular shell (5) made of metal, concentric with said first inner annular shell and external thereto and intended to be mounted on the surface of the bearing seat, and an intermediate elastomeric member (7) provided between said inner and outer shells and fixed thereto. Thanks to the configuration of the invention, any relative movement between the metal shells (3, 5) and the intermediate elastomeric member (7) is prevented, while allowing movement of the first inner shell (3) and the second outer shell (5) relative to each other, so that the radial and axial stiffness of the support only depends on the mechanical properties and geometry of the intermediate elastomeric member (7). When supports (1) are applied to the rolling hearings (21) supporting the rotating shaft of a rotary vacuum pump, the vibrations coming from said rotating shaft and from the pump rotor associated thereto can be effectively damped and the dynamic behavior of said rotating shaft and of said pump rotor associated thereto can be reliably predicted. ## Claims ### Claim 1 A support for rolling bearing comprising: a first inner annular shell made of metal; a second outer annular shell made of metal, concentric with the first inner annular shell and external thereto; and an elastomeric intermediate member provided between the first inner shell and the second outer shell and fastened to the first inner shell and to the second outer shell. ### Claim 2 (depends on 1) The support for rolling bearing according to claim 1, wherein the intermediate elastomeric member is directly molded between the first inner shell and the second outer shell. ### Claim 3 (depends on 1) The support for rolling bearing according to claim 1, wherein the intermediate elastomeric member is made of an elastomeric material having a high coefficient of thermal conductivity. ### Claim 4 (depends on 1) The support for rolling bearing according to claim 1, wherein the second outer shell of the support is provided with a plurality of axial through-holes for the passage of screws. ### Claim 5 (depends on 1) The support for rolling bearing according to claim 1, wherein the first inner shell of the support has, on its inner side, an inwardly protruding rim. ### Claim 6 (depends on 1) The support for rolling bearing according to claim 1, wherein an annular groove is provided in the middle portion in the axial direction of the outer surface of the first inner shell of the support, a corresponding annular grove is provided in the middle portion in the axial direction of the inner surface of the second outer shell of the support and the intermediate elastomeric member has an enlarged portion at the middle portion thereof in the axial direction, the enlarged portion fitting into the respective grooves of the shells ### Claim 7 A rolling bearing comprising an inner ring and an outer ring in which respective tracks for rolling elements are provided, provided with a support comprising a first inner annular shell made of metal and suitable for being mounted on the outer surface of said outer ring of said rolling bearing; a second outer annular shell made of metal, concentric with said first inner annular shell and external thereto and suitable for being mounted on the surface of the scat receiving said rolling bearing; and an intermediate member made of rubber and provided between said first inner shell and said second outer shell and fastened thereto. ### Claim 8 (depends on 7) The rolling bearing according to claim 7, wherein the first inner shell of the support is fitted with interference on the outer ring of the rolling bearing. ### Claim 9 (depends on 7) The rolling bearing according to claim 7, wherein the first inner shell of the support is made integral with the outer ring of the rolling bearing, by gluing, welding or similar technique or it is machined as a single piece with the outer ring. ### Claim 10 (depends on 7) The rolling bearing according to claim 7, wherein the second outer shell of the support is made integral with the seat receiving the rolling bearing, by screwing, gluing, welding or similar technique or it is machined as a single piece with the seat. ### Claim 11 (depends on 7) The rolling bearing according to claim 7, wherein the first inner shell of the support has, on its inner side, an inwardly protruding rim that partially extends over the outer ring of the rolling bearing. ### Claim 12 A rotary vacuum pump comprising: a pump housing having a pump inlet port and a pump outlet port and comprising a pump basement; a stator integral with the pump housing and provided with one or more stator discs; a rotating shaft mounted inside the pump housing; a rotor mounted on the rotating shaft and provided with one or more rotor discs, the rotor discs cooperating with the stator discs for pumping a gas from the pump inlet port to the pump outlet port; one or more rolling bearings supporting the rotating shaft; wherein at least one of the one or more rolling bearings is provided with a support comprising a first inner annular shell made of metal and suitable for being mounted on the outer surface of said outer ring of said rolling bearing; a second outer annular shell made of metal, concentric with said first inner annular shell and external thereto and suitable for being mounted on the surface of the seat receiving said rolling bearing; and an intermediate member made of rubber and provided between said first inner shell and said second outer shell and fastened thereto. ### Claim 13 (depends on 12) The rotary vacuum pump according to claim 12, wherein an axial gap is left between each of the rolling bearings and associated supports and the wall of the pump housing. ### Claim 14 (depends on 13) The rotary vacuum pump according to claim 13, wherein an annular resilient member is fitted in the axial gap between at least one rolling bearing and associated support and the wall of the pump housing. ### Claim 15 (depends on 12) The rotary vacuum pump according to claim 12, wherein at least one of the one or more rolling bearings and/or the support associated thereto directly abuts against the wall of the pump housing. ### Claim 16 (depends on 12) The rotary vacuum pump according to claim 12, wherein each rolling bearing is provided with a support comprising a first inner annular shell made of metal and suitable for being mounted on the outer surface of said outer of said rolling bearing; a second outer annular shell made of metal, concentric with said first inner annular shell and external thereto and suitable for being mounted on the surface of the seat receiving said rolling bearing; and an intermediate member made of rubber and provided between said first inner shell and said second outer shell and fastened thereto. ### Claim 17 (depends on 16) The rotary vacuum pump according to claim 16, wherein the pump comprises two rolling bearings supporting the rotating shaft, namely an upper rolling bearing and a lower rolling bearing. ### Claim 18 (depends on 17) The rotary vacuum pump according to claim 17, wherein the support of the upper rolling bearing and the support of the lower rolling bearing have a geometry different from each other. ### Claim 19 (depends on 12) The rotary vacuum pump according to claim 12, wherein the rotary vacuum pump is a turbomolecular pump.