# US 11,909,298 B2 · Housing of an electric machine having an optimized sealing ring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,298 B2 - Document ID: US11909298B2 - Status: Granted - Kind: B2 - Application number: 17/605,646 - Filed: 2020-04-01 - Published: 2022-06-30 - Granted: 2024-02-20 - Earliest claimed: 2019-04-26 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Thieu Huy Vuong; Camilo Andres Carrillo Estupinan; Stephan Geise - Web page: https://patentgrep.com/patent/US11909298B2 ## CPC - F16J 15/064: {the packing combining the sealing function with other functions} - H02K 9/197: in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator - F16J 15/061: {with positioning means (F16J15/0831 takes precedence)} - F16J 15/104: {characterised by structure} - H02K 5/203: {specially adapted for liquids, e.g. cooling jackets} - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract The present invention relates to a housing of an electric machine (1), comprising a hollow cylindrical housing element (5), in particular housing jacket, and at least one housing cover (6), which is attached to the end of the housing element (5), a cooling channel (8) being formed in the housing, the housing element (5) having at least two cooling channel sections (8.1) of the cooling channel (8), which each extend from a channel end opening (13) in an end face (11) of the housing element (5) in an axial direction relative to a housing axis (100) into the housing element (5). Two adjacent cooling channel sections (8.1) are flow-connected to each other via a deflection section (8.2) formed in the housing cover (6). There is a sealing gasket (7) for sealing off the cooling channel (8) between the housing element (5) and the housing cover (6), the sealing gasket (7) having through-openings (20) in the region of the channel end openings (13) for directing the cooling channel into the housing cover (6), and the sealing gasket (7) having an annular support (10) and a sealing assembly (9) mounted on the support. The housing is characterized in that the sealing assembly (9) surrounds the support (10) such that the support (10) is completely sealed off from the cooling channel (8) of the housing. ## Claims ### Claim 1 A housing of an electric machine (1) comprising a hollow cylindrical housing element (5) and at least one housing cover (6) which is attached to the end of the housing element (5), wherein a cooling channel (8) is formed in the housing, wherein the housing element (5) has at least two cooling channel portions (8.1) of the cooling channel (8), wherein the cooling channel portions (8.1) each extend axially in respect of a housing axis (100) in the housing element (5) from respective channel end openings (13) in an end face (11) of the housing element (5), wherein flows of two adjacent cooling channel portions (8.1) are each connected to one another via a deflection portion (8.2) formed in the housing cover (6), wherein a gasket (7) for sealing the cooling channel (8) is arranged between the housing element (5) and the housing cover (6), wherein the gasket (7) has through-openings (20) in a region of the channel end openings (13) for conducting the cooling channel in the housing cover (6), and wherein the gasket (7) has a ring-shaped support (10) and a sealing assembly (9) arranged on the support, characterized in that the sealing assembly (9) encloses the support (10) in such a manner that said support (10) is completely sealed off from the cooling channel (8) of the housing. ### Claim 2 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) has an inner ring (14), an outer ring (15), and webs (16) connecting the inner ring (14) and the outer ring (15). ### Claim 3 (depends on 2) The housing as claimed in claim 2, characterized in that the inner ring (14) and the outer ring (15) are each surrounded by the sealing assembly (9) in a C-shaped or clip-shaped manner, so that the inner ring (14) projects radially inwards and the outer ring (15) projects radially outwards from the sealing assembly (9). ### Claim 4 (depends on 2) The housing as claimed in claim 2, characterized in that the webs (16) are completely surrounded by the sealing assembly (9). ### Claim 5 (depends on 2) The housing as claimed in claim 2, characterized in that the sealing assembly (9) encloses the inner ring (14) and the outer ring (15) in a clip-shape or C-shape manner, as viewed in cross section from one of two ends of the support (10), via an inner circumference facing the cooling channel (8), to an other end of the support (10). ### Claim 6 (depends on 2) The housing as claimed in claim 2, characterized in that the sealing assembly (9) comprises a first layer thickness (A) over the inner ring (14) and/or over the outer ring (15), wherein the sealing assembly (9) has the first layer thickness (A) over a first group of webs (16) and a second layer thickness (B) over a second group of webs (16), wherein the second layer thickness (B) is smaller than the first layer thickness (A). ### Claim 7 (depends on 6) The housing as claimed in claim 6, characterized in that the sealing assembly (9) forms a sealing surface (17a) on the webs (16) of the first group, in order to seal off adjacent cooling channel portions (8.1), and on the webs (16) of the second group, the sealing assembly forms a connecting surface (17b), in order to connect adjacent cooling channel portions (8.1). ### Claim 8 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) has a constant wall thickness (C). ### Claim 9 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) is encapsulated with the sealing assembly (9), at least in part. ### Claim 10 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) is produced from a thermoplastic material. ### Claim 11 (depends on 1) The housing as claimed in claim 1, characterized in that the sealing assembly (9) is produced from an elastomer. ### Claim 12 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) comprises at least one centering pin (18), in order to center the gasket (7) on the housing element (5) and/or the housing cover (6). ### Claim 13 (depends on 1) An electric machine (1) comprising a housing as claimed in claim 1, a rotor (2), and a stator (4), wherein the stator (4) is attached to the hollow cylindrical housing element (5) of the housing. ### Claim 14 (depends on 1) The housing as claimed in claim 1, wherein the housing element (5) is a housing jacket. ### Claim 15 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) has an inner ring (14), an outer ring (15), and webs (16) connecting the inner ring (14) and the outer ring (15), wherein the inner ring (14), the outer ring (15), and the webs (16) have an integral design. ### Claim 16 (depends on 2) The housing as claimed in claim 2, characterized in that the inner ring (14) and the outer ring (15) are each surrounded by the sealing assembly (9) in a C-shaped or clip-shaped manner, so that the inner ring (14) and the outer ring (15) end flush with the sealing assembly (9). ### Claim 17 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) is produced from a thermoplastic material which is fiber-filled. ### Claim 18 (depends on 10) The housing as claimed in claim 10, characterized in that the sealing assembly (9) is produced from an elastomer. ### Claim 19 (depends on 1) The housing as claimed in claim 1, characterized in that the support (10) comprises multiple centering pins (18), in order to center the gasket (7) on the housing element (5) and/or the housing cover (6).