# US 9,520,759 B2 · Motor driven compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,759 B2 - Document ID: US9520759B2 - Status: Granted - Kind: B2 - Application number: 14/070,037 - Filed: 2013-11-01 - Published: 2014-05-15 - Granted: 2016-12-13 - Earliest claimed: 2012-11-15 - Assignees: Kabushiki Kaisha Toyota Jidoshokki - Applicants: Kabushiki Kaisha Toyota Jidoshokki - Inventors: Junya Yano; Yusuke Kinoshita; Satoru Egawa; Kazuhiro Kuroki; Ken Suitou - Web page: https://patentgrep.com/patent/US9520759B2 ## CPC - H02K 11/0141: {Shields associated with casings, enclosures or brackets} - F04B 35/04: the means being electric - F04B 39/121: {Casings} - F04C 29/00: Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00 - H02K 11/02: for suppression of electromagnetic interference - H02K 5/24: specially adapted for suppression or reduction of noise or vibrations - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract A motor-driven compressor that includes a metal housing accommodating a compression unit and an electric motor, a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise, and a bolt that couples the cover to the housing. The housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor. The cover includes an insertion hole into which the bolt is insertable. The shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing. The cover is configured to allow for an axial force of the bolt to be applied to the seat and not to the resin portion. ## Claims ### Claim 1 A motor-driven compressor comprising: a metal housing accommodating a compression unit and an electric motor; a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise; and a bolt that couples the cover to the housing, wherein the housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor, the cover includes an insertion hole into which the bolt is insertable, the shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing without the resin portion being held therebetween so that an axial force of the bolt is applied to the seat and not to the resin portion. ### Claim 2 (depends on 1) The motor-driven compressor according to claim 1 wherein, the insertion hole includes a first insertion hole, which is formed in the shield, and a second insertion hole, which is formed in the resin portion, the second insertion hole has a larger diameter than the first insertion hole, the motor-driven compressor further comprises a spacer arranged in the second insertion hole, the bolt is inserted into the spacer, the spacer receives the axial force of the bolt and is held between the bolt and the seat, and the spacer includes an end surface that contacts the seat. ### Claim 3 (depends on 2) The motor-driven compressor according to claim 2, wherein the spacer is integrally fixed to the resin portion. ### Claim 4 (depends on 2) The motor-driven compressor according to claim 2, further comprising an annular first sealing member, wherein the bolt includes a shaft and a head, the first sealing member surrounds the shaft and is held between the spacer and the head of the bolt in an axial direction of the bolt. ### Claim 5 (depends on 1) The motor-driven compressor according to claim 1, wherein the insertion hole includes a first insertion hole, which is formed in the shield, and a second insertion hole, which is formed in the resin portion, the bolt includes a shaft, which is inserted into the first insertion hole, a large diameter portion, which is arranged in the second insertion hole and has a larger outer diameter than the shaft, and a head, the shaft and the head are located at opposite sides of the large diameter portion, the bolt includes a first step, which is located between the shaft and the large diameter portion, and a second step, which is located between the large diameter portion and the head, and the first step is in contact with the seat. ### Claim 6 (depends on 1) The motor-driven compressor according to claim 1, wherein the shield is inside the resin portion. ### Claim 7 A motor-driven compressor comprising: a metal housing accommodating a compression unit and an electric motor; a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise; a bolt that couples the cover to the housing, wherein the housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor, the cover includes an insertion hole into which the bolt is insertable, the shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing, the cover is configured to allow for an axial force of the bolt to be applied to the seat and not to the resin portion, the insertion hole includes a first insertion hole, which is formed in the shield, and a second insertion hole, which is formed in the resin portion, the bolt includes a shaft, which is inserted into the first insertion hole, a large diameter portion, which is arranged in the second insertion hole and has a larger outer diameter than the shaft, and a head, the shaft and the head are located at opposite sides of the large diameter portion, the bolt includes a first step, which is located between the shaft and the large diameter portion, and a second step, which is located between the large diameter portion and the head, and the first step is in contact with the seat; and an annular second sealing member arranged in the second insertion hole around the large diameter portion. ### Claim 8 (depends on 7) The motor-driven compressor according to claim 7, wherein the second sealing member is pressed by the second step toward the housing and elastically deformed. ### Claim 9 (depends on 8) The motor-driven compressor according to claim 8, wherein the second sealing member is held between the second step and the shield in an axial direction of the bolt. ### Claim 10 (depends on 8) The motor-driven compressor according to claim 8, wherein the second sealing member is held between the second step and the resin portion in the axial direction of the bolt. ### Claim 11 A motor-driven compressor comprising: a metal housing accommodating a compression unit and an electric motor; a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise; and a bolt that couples the cover to the housing, wherein the housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor, the cover includes an insertion hole into which the bolt is insertable, the shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing, the cover is configured to allow for an axial force of the bolt to be applied to the seat and not to the resin portion, and a surface of the seat is in direct contact with the housing.