Permanent magnet synchronous motor

Abstract

The utility model provides a permanent magnet synchronous motor, and relates to the technical field of motors. The permanent magnet synchronous motor comprises an upper tool, a rotor assembly, a stator assembly and a lower tool, wherein the stator assembly comprises a stator and a casing, the bottom of the casing is provided with a positioning hole, and the stator is provided with a three-phase PIN; the lower tool is provided with a positioning pin matched with the positioning hole; the upper tool is provided with a first PIN through hole, the rotor assembly is provided with a second PIN through hole, and the three-phase PIN is arranged in the first PIN through hole and the second PIN through hole in a penetrating mode. Compared with the prior art, the motor has the advantages that lugs and positioning holes are additionally arranged on the end cover and the casing, so that the structural complexity can be reduced, the production cost can be saved, and the occupied space of the whole motor in an automobile EMB system can be reduced on the premise of ensuring the process assembly and the structural strength of the motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and particularly relates to a permanent magnet synchronous motor. BACKGROUND

[0002] In the technical field of electric machines, permanent magnet synchronous motors are widely used in vehicles due to their excellent performance, and the overall size of the permanent magnet synchronous motor is increasingly miniaturized in vehicle design. Smaller motor components not only save space on the vehicle, but also shorten the torque transmission distance.

[0003] In the related art, the casing, stator and rotor of the permanent magnet synchronous motor are integrally assembled to ensure that the relative positions of the three-phase PIN and the casing are correct. Ears and positioning holes are added to the end cover and the casing.

[0004] However, adding ears and positioning holes to the end cover and the casing increases the material cost, structural complexity and occupied space of the permanent magnet synchronous motor.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE PRESENT INVENTION

[0006] The present application provides a permanent magnet synchronous motor, which at least reduces the material cost, structural complexity and occupied space of the permanent magnet synchronous motor to some extent.

[0007] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0008] According to one aspect of the present application, a permanent magnet synchronous motor is provided, comprising: an upper tooling, a rotor assembly, a stator assembly and a lower tooling; wherein the stator assembly comprises a stator and a casing, the bottom of the casing is configured with a positioning hole, and the stator is provided with three-phase PINs; the lower tooling is configured with a positioning pin matched with the positioning hole; the upper tooling is configured with a first PIN through hole, the rotor assembly is configured with a second PIN through hole, and the three-phase PINs are arranged in the first PIN through hole and the second PIN through hole.

[0009] The locating holes at the bottom of the housing cooperate with the locating pins of the lower tooling to ensure the circumferential rotation angle of the stator. Through the first PIN through hole and the second PIN through hole, the rotor assembly can be positioned by cooperating with the upper tooling through the three-phase PINs to achieve the relative circumferential rotation angle. The relative rotation angle of the upper and lower toolings is fixed, and they can only perform axial translational movement. Therefore, the two can directly move axially to assemble the whole machine, which can ensure the positional accuracy requirements of the three-phase PINs. Compared with adding ears and locating holes on the end cover and housing, this method can reduce structural complexity, save production costs, and reduce the space occupied by the whole motor in the automotive EMB (Electro-Mechanical Brake) system, while ensuring the motor assembly process and structural strength.

[0010] In one embodiment of this application, the bottom of the rotor assembly includes a bearing, the bottom of the housing includes a protruding groove, the bearing is disposed in the protruding groove, and the positioning hole is disposed at the bottom of the housing and is not located in the area of ​​the protruding groove.

[0011] By placing the positioning hole at the bottom of the housing, in an area not belonging to the protruding groove, the stability of the entire motor structure can be ensured after the positioning hole at the bottom of the housing mates with the positioning pin of the lower tooling.

[0012] In one embodiment of this application, the positioning hole is connected to the protruding groove.

[0013] Connecting the positioning hole to the protruding groove can improve the stability of the positioning hole structure.

[0014] In one embodiment of this application, the stator is further provided with a fixing structure, and the three-phase PINs are disposed through the fixing structure; the fixing structure is disposed through the first PIN through hole and the second PIN through hole.

[0015] By configuring a fixed structure, the stability of the three-phase pins can be improved. Furthermore, by inserting the fixed structure through the first and second pin through holes, the rotor assembly and the upper tooling can be properly and stably positioned for relative circumferential rotation, ensuring the overall structural stability of the motor.

[0016] In one embodiment of this application, the fixing structure is in clearance fit with the first PIN through hole; the fixing structure is in clearance fit with the second PIN through hole.

[0017] In one embodiment of this application, the upper tooling has a first groove and a second groove on its side; the lower tooling has a third groove that mates with the first groove and a fourth groove that mates with the second groove on its side; the permanent magnet synchronous motor further includes a first fixing rod and a second fixing rod; the first fixing rod is disposed in the first groove and the third groove, and the second fixing rod is disposed in the second groove and the fourth groove.

[0018] By configuring the first groove, the second groove, the third groove, and the fourth groove, as well as the first fixing rod and the second fixing rod, the overall structure of the motor can be made more stable.

[0019] In one embodiment of this application, the first groove and the second groove are located at both ends of the same diameter in the upper tooling; the third groove and the fourth groove are located at both ends of the same diameter in the lower tooling.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] Figure 1 A schematic diagram of a permanent magnet synchronous motor according to one embodiment of this application is shown;

[0023] Figure 2 An exploded view of a permanent magnet synchronous motor according to one embodiment of this application is shown;

[0024] Figure 3 A schematic diagram of the upper tooling in one embodiment of this application is shown;

[0025] Figure 4 A schematic diagram of a rotor assembly according to one embodiment of this application is shown;

[0026] Figure 5 A schematic diagram of a stator assembly according to one embodiment of this application is shown;

[0027] Figure 6 This diagram illustrates the lower tooling in one embodiment of the present application. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0029] Furthermore, the accompanying drawings are merely illustrative of this application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted.

[0030] like Figures 1-6 As shown, the permanent magnet synchronous motor in this embodiment may include: upper tooling 1, rotor assembly 2, stator assembly 3 and lower tooling 4.

[0031] The stator assembly 3 includes a stator 31 and a housing 32. The bottom of the housing 32 is provided with a positioning hole 321, and the stator 31 has a three-phase PIN 311.

[0032] The lower tooling 4 is equipped with a positioning pin 41 that mates with the positioning hole 321.

[0033] The upper tooling 1 is equipped with a first PIN through hole 11, the rotor assembly 2 is equipped with a second PIN through hole 21, and the three-phase PIN 311 passes through the first PIN through hole 11 and the second PIN through hole 21.

[0034] By utilizing the positioning holes at the bottom of the housing and the positioning pins of the lower tooling, the circumferential rotation angle of the stator is ensured. Through the first and second pin through holes, the rotor assembly can be positioned by the three-phase pins and the upper tooling to achieve the relative circumferential rotation angle. The relative rotation angles of the upper and lower toolings are fixed, and they can only perform axial translational movement. Therefore, the two can directly move axially to assemble the whole machine, which can ensure the positional accuracy requirements of the three-phase pins. Compared with adding ears and positioning holes on the end cover and housing, this method can reduce structural complexity, save production costs, and reduce the space occupied by the whole motor in the automotive EMB system while ensuring the motor assembly process and structural strength.

[0035] In one embodiment of this application, the bottom of the rotor assembly 2 includes a bearing 22, the bottom of the housing 32 includes a protrusion groove 322, the bearing 22 is disposed in the protrusion groove 322, and the positioning hole 321 is disposed at the bottom of the housing 32 and is not in the area of ​​the protrusion groove 322.

[0036] By placing the positioning hole at the bottom of the housing, which is not in the area of ​​the protruding groove, the stability of the entire motor structure can be ensured after the positioning hole at the bottom of the housing is engaged with the positioning pin of the lower tooling.

[0037] In one embodiment of this application, the positioning hole 321 is connected to the protruding groove 322.

[0038] Connecting the positioning hole to the protruding groove can improve the stability of the positioning hole structure.

[0039] In one embodiment of this application, a fixing structure 3111 is also provided on the stator 31, and the three-phase pins 311 are inserted through the fixing structure 3111.

[0040] The fixing structure 3111 is inserted into the first PIN through hole 11 and the second PIN through hole 21.

[0041] By configuring a fixed structure, the stability of the three-phase pins can be improved. Furthermore, by inserting the fixed structure through the first and second pin through holes, the rotor assembly and the upper tooling can be properly and stably positioned for relative circumferential rotation, ensuring the overall structural stability of the motor.

[0042] In one embodiment of this application, the fixing structure 3111 is clearance-fitted with the first PIN through hole 11.

[0043] The fixed structure 3111 is clearance-fitted with the second PIN through hole 21.

[0044] In one embodiment of this application, the lower tooling 4 is provided with a third groove 42 that mates with the first groove 12 and a fourth groove 43 that mates with the second groove 13 on its side.

[0045] The permanent magnet synchronous motor also includes: a first fixed bar 5 and a second fixed bar 6.

[0046] The first fixing bar 5 is disposed in the first groove 12 and the third groove 42, and the second fixing bar 6 is disposed in the second groove 13 and the fourth groove 43.

[0047] By configuring the first and second grooves, the third and fourth grooves, as well as the first and second fixing rods, the overall structure of the motor can be made more stable. The upper tooling 1 has a first groove 12 and a second groove 13 on its side.

[0048] In one embodiment of this application, the first groove 12 and the second groove 13 are located at both ends of the same diameter in the upper tooling 1.

[0049] The third groove 42 and the fourth groove 43 are located at both ends of the same diameter in the lower tooling 4.

[0050] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the appended claims.

Claims

1. A permanent magnet synchronous motor, characterized in that, include: Upper tooling (1), rotor assembly (2), stator assembly (3) and lower tooling (4); The stator assembly (3) includes a stator (31) and a housing (32). The bottom of the housing (32) is provided with a positioning hole (321), and the stator (31) has a three-phase pin (311). The lower tooling (4) is equipped with a positioning pin (41) that mates with the positioning hole (321); The upper tooling (1) is provided with a first PIN through hole (11), the rotor assembly (2) is provided with a second PIN through hole (21), and the three-phase PIN (311) passes through the first PIN through hole (11) and the second PIN through hole (21).

2. The permanent magnet synchronous motor according to claim 1, characterized in that, The bottom of the rotor assembly (2) includes a bearing (22), the bottom of the housing (32) includes a protrusion groove (322), the bearing (22) is disposed in the protrusion groove (322), and the positioning hole (321) is disposed at the bottom of the housing (32) and is not in the area of ​​the protrusion groove (322).

3. The permanent magnet synchronous motor according to claim 2, characterized in that, The positioning hole (321) is connected to the protruding groove (322).

4. The permanent magnet synchronous motor according to claim 1, characterized in that, The stator (31) is also provided with a fixing structure (3111), and the three-phase pins (311) are inserted through the fixing structure (3111); The fixing structure (3111) passes through the first PIN through hole (11) and the second PIN through hole (21).

5. The permanent magnet synchronous motor according to claim 4, characterized in that, The fixing structure (3111) is clearance-fitted with the first PIN through hole (11); The fixing structure (3111) is clearance-fitted with the second PIN through hole (21).

6. The permanent magnet synchronous motor according to claim 1, characterized in that, The upper tooling (1) has a first groove (12) and a second groove (13) on its side; The lower tooling (4) has a third groove (42) that mates with the first groove (12) and a fourth groove (43) that mates with the second groove (13) on its side. The permanent magnet synchronous motor also includes: a first fixed bar (5) and a second fixed bar (6); The first fixing bar (5) is disposed in the first groove (12) and the third groove (42), and the second fixing bar (6) is disposed in the second groove (13) and the fourth groove (43).

7. The permanent magnet synchronous motor according to claim 6, characterized in that, The first groove (12) and the second groove (13) are located at both ends of the same diameter in the upper tooling (1); The third groove (42) and the fourth groove (43) are located at both ends of the same diameter in the lower tooling (4).

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