# US 2014/0191607 A1 · Motor rotor and motor having same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191607 A1 - Document ID: US20140191607A1 - Status: Published application - Kind: A1 - Application number: 14/235,604 - Filed: 2011-08-29 - Published: 2014-07-10 - Earliest claimed: 2011-08-05 - Assignees: Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai; Gree Electric Appliances, Inc. of Zhuhai - Inventors: Hui Huang; Yusheng Hu; Dongsuo Chen; Huajie Chen; Yong Xiao; Xueying Zeng; Wenming Zhang - Web page: https://patentgrep.com/patent/US20140191607A1 ## CPC - H02K 1/27: Rotor cores with permanent magnets - H02K 1/246: {Variable reluctance rotors} - H02K 1/2766: {having a flux concentration effect} - H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract Disclosed is a motor rotor, comprising an iron core (10) and permanent magnets (20) provided inside the iron core (10). The iron core (10) is provided with sets of mounting grooves (30) on the iron core (10) in the peripheral direction of the iron core, each set of mounting grooves (30) comprising two or more mounting grooves (30) provided intermittently in the radial direction of the iron core (10). There are sets of permanent magnets (20), the individual permanent magnets (20) of each set of permanent magnets (20) correspondingly being embedded into the individual mounting grooves (30) of each set of mounting grooves; there is an island region (12) between the outermost layer of mounting grooves (30) and the periphery of the iron core (10), and an enhancing hole (13) is provided in the island region (12), an enhancing rod (60) being provided in the enhancing hole (13). Disclosed is a motor, comprising a motor stator (50) and the above-mentioned motor rotor, with the motor rotor provided inside the motor stator (50). The motor rotor enhances the structural strength of the whole rotor and improves the performance of the motor. ## Claims ### Claim 1 A motor rotor, comprising an iron core and a permanent magnet arranged inside the iron core, wherein, multiple groups of mounting grooves are arranged in the iron core along a circumferential direction of the iron core, and each group of mounting grooves comprises two or more than two mounting grooves arranged at intervals in a radial direction of the iron core; multiple groups of permanent magnets are provided, and permanent magnets in each group of permanent magnets correspondingly embedded into corresponding mounting grooves in each group of mounting grooves; and an island-shaped region is provided between the outmost layer of the mounting grooves and a periphery of the iron core, the island-shaped region has a reinforcing hole, a reinforcing rod is arranged inside the reinforcing hole, and end portions of the reinforcing rod are connected via a reinforcing member. ### Claim 2 (depends on 1) The motor rotor according to claim 1, wherein, the reinforcing hole is a through hole arranged in the rotor, the reinforcing rod is a rivet, and the rivet passes through the through hole and is riveted to the reinforcing member. ### Claim 3 (depends on 1) The motor rotor according to claim 1, wherein, the island-shaped region of each group of mounting grooves is provided with the reinforcing hole. ### Claim 4 (depends on 1) The motor rotor according to claim 1, wherein, the reinforcing member is a fixing plate arranged on both ends of the iron core, and the reinforcing rod passes through the reinforcing hole and is connected to the fixing plate. ### Claim 5 (depends on 1) The motor rotor according to claim 1, wherein, in an inward direction from the periphery of the iron core, a distance L between an edge of each mounting groove in each group of mounting grooves and the periphery of the iron core increases gradually. ### Claim 6 (depends on 5) The motor rotor according to claim 5, wherein, in a case that each group of mounting grooves comprises two layers of mounting grooves, in the inward direction from the periphery of the iron core, a distance between an edge of the outmost mounting groove and the periphery of the iron core is La, and a distance between an edge of the mounting groove adjacent to the outmost mounting groove and the periphery of the iron core is Lb, wherein, 2La≧Lb≧1.1La. ### Claim 7 (depends on 5) The motor rotor according to claim 5, wherein, each group of mounting grooves comprises three or more than three mounting grooves arranged at intervals in the radial direction of the iron core. ### Claim 8 (depends on 7) The motor rotor according to claim 7, wherein, in an outward direction from a center of the iron core, distances between edges of three mounting grooves, starting from the mounting groove closest to the center of the iron core, and the periphery of the iron core are respectively Lc, Lb and La, wherein, 2Lb≧Lc≧1.2Lb, 2La≧Lb≧1.1La. ### Claim 9 A motor comprising a motor stator and the motor rotor, wherein, the motor rotor is arranged inside of the motor stator, and the motor rotor comprises an iron core and a permanent magnet arranged inside the iron core, wherein, multiple groups of mounting grooves are arranged in the iron core along a circumferential direction of the iron core, and each group of mounting grooves comprises two or more than two mounting grooves arranged at intervals in a radial direction of the iron core; multiple groups of permanent magnets are provided, and permanent magnets in each group of permanent magnets are correspondingly embedded into corresponding mounting grooves in each group of mounting grooves; and an island-shaped region is provided between the outmost layer of the mounting grooves and a periphery of the iron core, the island-shaped region has a reinforcing hole, a reinforcing rod is arranged inside the reinforcing hole, and end portions of the reinforcing rod are connected via a reinforcing member. ### Claim 10 (depends on 9) The motor rotor according to claim 9, further comprising a fixing plate, wherein a rivet passes through the fixing plate and the iron core to connect the fixing plate to the rotor. ### Claim 11 (depends on 9) The motor rotor according to claim 9, wherein, a distance between an inner circumference of the motor stator and a periphery of the motor rotor is n, and 0.35 mm≦n≦0.55 mm.