A permanent magnet synchronous motor structure applicable to a hybrid vehicle assembly

Abstract

The permanent magnet synchronous motor structure of the present invention is applicable to a hybrid vehicle assembly, and includes a motor housing, a front end cover, a rear end cover, a rotor assembly, a stator assembly, a resolver assembly, a front bearing, and a rear bearing. The rotor assembly includes a rotor shaft, a rotor core, baffles, and a lock nut. One end of the rotor shaft protrudes with a shaft shoulder for positioning the rotor core. The rotor core is sleeved outside the rotor shaft, and the end face of its first end is positioned on the inner surface of the shaft shoulder. The baffles include a left baffle and a right baffle, and the left baffle and the right baffle are respectively baffles with circular through holes provided on the inner side. The left baffle is sleeved outside the shaft shoulder of the rotor shaft, and the diameter of the circular through hole on the inner side of the left baffle is equal to the outer diameter of the shaft shoulder of the rotor shaft. The lock nut is sleeved outside the rotor shaft and locks the end face of the second end of the rotor core. The right baffle is sleeved outside the lock nut, and the diameter of the circular through hole on the inner side of the right baffle is equal to the outer diameter of the lock nut. The structure of the present invention is compact and the assembly is convenient, and it can be conveniently installed into the original vehicle engine compartment.

Description

Technical Field

[0001] The present invention relates to a motor structure for an automobile, and particularly to a permanent magnet synchronous motor structure applicable to a hybrid vehicle assembly. Background Art

[0002] With the depletion of oil resources and the increasing environmental pollution, each country has accelerated the research and development and popularization of new energy vehicles. Considering various factors such as energy-saving effect, cost, difficulty of structural modification, and industrialization feasibility, hybrid vehicles are models with relatively promising market prospects. Major automobile manufacturers at home and abroad are sparing no effort to research and develop hybrid vehicle models. Hybrid vehicles use an engine and a drive motor as hybrid power sources, and have advantages such as low fuel consumption, full combustion, cleaner exhaust gas, and no idling at startup.

[0003] In the design and practical application of permanent magnet synchronous motors applied to hybrid vehicles, the axial length of the permanent magnet synchronous motor is often restricted by the vehicle layout space. Under the premise of meeting the performance requirements, it is difficult for existing permanent magnet synchronous motors to meet the installation space requirements of the vehicle layout in terms of structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a permanent magnet synchronous motor structure applicable to a hybrid vehicle assembly to address the defects existing in the above-mentioned prior art. The structure is compact and convenient to assemble, and can be easily installed into the original vehicle engine compartment.

[0005] The technical solution adopted by the present invention to achieve the above purpose is: a permanent magnet synchronous motor structure applicable to a hybrid vehicle assembly, including a housing, a front end cover, a rear end cover, a rotor assembly, a stator assembly, a resolver assembly, a front bearing, and a rear bearing. The front end cover and the rear end cover are respectively connected to the front and rear ends of the housing. The front end cover and the rear end cover are respectively provided with shaft holes that can support both ends of the rotor shaft of the rotor assembly. The rotor assembly and the stator assembly are respectively arranged between the front end cover and the rear end cover inside the housing, and the stator assembly is located on the outer edge of the rotor assembly. The rotor assembly includes a rotor shaft, a rotor core, a baffle, and a lock nut. One end of the rotor shaft protrudes with a shaft shoulder that can position the rotor core. The rotor core is sleeved on the rotor shaft, and the end face of its first end is positioned on the inner surface of the shaft shoulder. The baffle includes a left baffle and a right baffle. The left baffle and the right baffle are respectively baffles with circular through holes on the inner side. The left baffle is sleeved on the shaft shoulder of the rotor shaft, and the diameter of the circular through hole on the inner side of the left baffle is equal to the outer diameter of the shaft shoulder of the rotor shaft. The lock nut is sleeved on the rotor shaft and locks the end face of the second end of the rotor core. The right baffle is sleeved on the lock nut, and the diameter of the circular through hole on the inner side of the right baffle is equal to the outer diameter of the lock nut.

[0006] A further technical solution of the present invention is that bearing positions connected to the shaft holes are respectively provided at the outer edges of the shaft holes of the front end cover and the rear end cover. The front bearing and the rear bearing are respectively arranged in the bearing positions of the front end cover and the rear end cover, and the two ends of the rotor shaft are in interference fit with the front bearing and the rear bearing respectively.

[0007] A further technical solution of the present invention is that the outer edges of the bearing positions on the inner sides of the front end cover and the rear end cover are respectively hollowed outwards to form a wire package arrangement space, and the stator windings of the stator assembly can extend into the wire package arrangement space.

[0008] A further technical solution of the present invention is that a wave washer is also arranged between the end face of the bearing position of the front bearing and the outer end face of the front bearing.

[0009] A further technical solution of the present invention is that the rotor assembly further includes long bolts. Mounting holes Ⅰ penetrating the first end face and the second end face are arranged at intervals on the rotor core. Mounting holes Ⅱ are arranged on the left baffle and the right baffle at positions corresponding to the mounting holes Ⅰ of the rotor core. The long bolts pass through the corresponding mounting holes Ⅰ and mounting holes Ⅱ to position the rotor core between the left baffle and the right baffle.

[0010] The permanent magnet synchronous motor structure applicable to the hybrid vehicle assembly of the present invention has the following beneficial effects: The left baffle is sleeved outside the shaft shoulder of the rotor shaft, the right baffle is sleeved outside the lock nut, and the long bolts cooperate with the left and right baffles to position the rotor core, so that the axial length of the rotor shaft of the rotor assembly can be designed to be the shortest; The fixing method of the front and rear bearings and the rotor assembly adopts interference fitting, and no other parts are required for fixing, making the assembly of the rotor and the two end covers more compact; Hollowing out the inner sides of the front and rear end covers to form a wire package arrangement space can also appropriately shorten the distance between the front and rear end covers. The structure of the motor assembly is compact and easy to assemble, and the reliability level of the motor is not affected.

[0011] The following further describes the permanent magnet synchronous motor structure applicable to the hybrid vehicle assembly of the present invention in conjunction with the drawings and embodiments. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the rotor assembly of the permanent magnet synchronous motor applicable to the hybrid vehicle assembly of the present invention;

[0013] Figure 2 is a schematic diagram of the permanent magnet synchronous motor structure applicable to the hybrid vehicle assembly of the present invention;

[0014] Description of the reference numerals in the drawings: 1 - Rotor shaft, 2 - Axle shoulder, 3 - Long bolt, 4 - Left baffle, 5 - Rotor core, 6 - Right baffle, 7 - Lock nut, 8 - Second end face, 9 - First end face, 10 - Rotor assembly, 11 - Stator assembly, 12 - Rear end cover, 13 - Resolver assembly, 14 - Rear bearing, 15 - Front bearing, 16 - Wave washer, 17 - Space for winding arrangement, 18 - Front end cover, 19 - Housing, 20 - Stator winding. Detailed implementation mode

[0015] As Figure 1 , Figure 2 shown, a permanent magnet synchronous motor structure applicable to a hybrid vehicle assembly according to the present invention includes a housing 19, a front end cover 18, a rear end cover 12, a rotor assembly 10, a stator assembly 11, a resolver assembly 13, a front bearing 15, and a rear bearing 14. The front end cover 18 and the rear end cover 12 are respectively connected to the front and rear ends of the housing 19. The front end cover 18 and the rear end cover 12 are respectively provided with shaft holes capable of supporting both ends of the rotor shaft 1 of the rotor assembly 10. The rotor assembly 10 and the stator assembly 11 are respectively arranged between the front end cover 18 and the rear end cover 12 inside the housing 19, and the stator assembly 11 is located on the outer edge of the rotor assembly 10. The resolver assembly 13 is connected to the inner side of the rear end cover 12 outside the rear bearing 14.

[0016] The rotor assembly 10 includes a rotor shaft 1, a rotor core 5, baffles, and a lock nut 7. The rotor assembly 10 further includes a long bolt 3. One end of the rotor shaft 1 protrudes with an axle shoulder 2 capable of positioning the rotor core 5. The rotor core 5 is sleeved outside the rotor shaft 1, and its first end face 9 is positioned on the inner surface of the axle shoulder 2. The baffles include a left baffle 4 and a right baffle 6. The left baffle 4 and the right baffle 6 are respectively baffles with circular through holes provided on the inner side. The left baffle 4 is sleeved outside the axle shoulder 2 of the rotor shaft 1. The diameter of the circular through hole on the inner side of the left baffle 4 is equal to the outer diameter of the axle shoulder 2 of the rotor shaft 1. The lock nut 7 is sleeved outside the rotor shaft 1 and locks the second end face 8 of the rotor core 5. The right baffle 6 is sleeved outside the lock nut 7. The diameter of the circular through hole on the inner side of the right baffle 6 is equal to the outer diameter of the lock nut 7. With this structural arrangement, the left baffle 4 and the right baffle 6 do not occupy the axial space of the rotor shaft 1, and the axial length of the rotor shaft 1 can be designed to be the shortest.

[0017] Mounting holes Ⅰ penetrating the first end face and the second end face are arranged at intervals on the rotor core 5. Without affecting the magnetic circuit, appropriate mounting holes Ⅰ are designed on the rotor core 5 to facilitate the passing through and fixing of the long bolt 3. Mounting holes Ⅱ are provided on the left baffle 4 and the right baffle 6 at positions corresponding to the mounting holes Ⅰ of the rotor core 5. The long bolt 3 passes through the corresponding mounting holes Ⅰ and mounting holes Ⅱ to position the rotor core 5 between the left baffle 4 and the right baffle 6.

[0018] The outer edges of the shaft holes of the front end cover 18 and the rear end cover 12 are respectively provided with bearing seats connected to the shaft holes. The front bearing 15 and the rear bearing 14 are respectively arranged in the bearing seats of the front end cover 18 and the rear end cover 12. The two ends of the rotor shaft 1 are in interference fit with the front bearing 15 and the rear bearing 14 respectively, without the need for other fixing parts. The outer edges of the bearing seats on the inner sides of the front end cover 18 and the rear end cover 12 are respectively hollowed out to form wire-wound arrangement spaces 17. The stator windings 20 of the stator assembly 11 can extend into the wire-wound arrangement spaces 17. Hollowing out the inner sides of the front and rear end covers 12 to form the wire-wound arrangement spaces 17 can also appropriately shorten the distance between the front and rear end covers 12, making the structure of the motor assembly more compact. A wave washer 16 is also arranged between the end face of the bearing seat of the front bearing 15 and the outer end face of the front bearing 15.

[0019] Through the above structural improvements, flexible design of the front and rear end covers 12 and the rotor assembly 10 can be achieved. Furthermore, the overall length of the motor structure can be designed to be optimal, meeting the assembly requirements of the minimum axial length dimension on the premise of ensuring its working reliability.

[0020] The above embodiments are only the preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A permanent magnet synchronous motor structure applicable to a hybrid vehicle assembly, comprising a motor housing (19), a front end cover (18), a rear end cover (12), a rotor assembly (10), a stator assembly (11), a resolver assembly (13), a front bearing (15), and a rear bearing (14). The front end cover (18) and the rear end cover (12) are respectively connected to the front and rear ends of the motor housing (19). The front end cover (18) and the rear end cover (12) are respectively provided with shaft holes capable of supporting both ends of the rotor shaft (1) of the rotor assembly (10). The rotor assembly (10) and the stator assembly (11) are respectively arranged between the front end cover (18) and the rear end cover (12) inside the motor housing (19), and the stator assembly (11) is located at the outer edge of the rotor assembly (10), characterized in that, The rotor assembly (10) includes a rotor shaft (1), a rotor core (5), baffles, and a lock nut (7). One end of the rotor shaft (1) protrudes with a shoulder (2) for positioning the rotor core (5). The rotor core (5) is sleeved outside the rotor shaft (1), and the first end face (9) thereof is positioned on the inner surface of the shoulder (2). The baffles include a left baffle (4) and a right baffle (6). The left baffle (4) and the right baffle (6) are respectively baffles with circular through holes on the inner side. The left baffle (4) is sleeved outside the shoulder (2) of the rotor shaft (1), and the diameter of the circular through hole on the inner side of the left baffle (4) is equal to the outer diameter of the shoulder (2) of the rotor shaft (1). The lock nut (7) is sleeved outside the rotor shaft (1) and locks the second end face (8) of the rotor core (5). The right baffle (6) is sleeved outside the lock nut (7), and the diameter of the circular through hole on the inner side of the right baffle (6) is equal to the outer diameter of the lock nut (7). The outer edges of the shaft holes of the front end cover (18) and the rear end cover (12) are respectively provided with bearing positions connected to the shaft holes. The front bearing (15) and the rear bearing (14) are respectively arranged in the bearing positions of the front end cover (18) and the rear end cover (12). The two ends of the rotor shaft (1) are in interference fit with the front bearing (15) and the rear bearing (14) respectively. The outer edges of the bearing positions on the inner sides of the front end cover (18) and the rear end cover (12) are respectively hollowed out outward to form a wire winding arrangement space (17), and the stator winding (20) of the stator assembly (11) can extend into the wire winding arrangement space (17). A corrugated washer (16) is further arranged between the end face of the bearing position of the front bearing (15) and the outer end face of the front bearing (15).

2. The permanent magnet synchronous motor structure applicable to the hybrid vehicle assembly according to claim 1, characterized in that, The rotor assembly (10) further includes long bolts (3). The rotor core (5) is provided with mounting holes I penetrating through the first end face and the second end face at intervals. The left baffle (4) and the right baffle (6) are provided with mounting holes II at positions corresponding to the mounting holes I of the rotor core (5). The long bolts (3) pass through the corresponding mounting holes I and mounting holes II to position the rotor core (5) between the left baffle (4) and the right baffle (6).

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