Segmented skewed pole motor rotor core

Abstract

The utility model provides a segmented skewed pole motor rotor core. The segmented skewed pole motor rotor iron core comprises a main shaft, the main shaft is fixedly connected with a fixing block, and the main shaft is provided with a first rotor iron core, a second rotor iron core, a third rotor iron core and a fourth rotor iron core. The first rotor iron core, the second rotor iron core, the third rotor iron core and the fourth rotor iron core are respectively provided with a plurality of skewed slots, and the skewed slots in the first rotor iron core, the second rotor iron core, the third rotor iron core and the fourth rotor iron core are mutually staggered and have preset angles. According to the segmented skewed pole motor rotor iron core provided by the utility model, the rotor segmented skewed pole structure and the assembly process of the rotor iron core are simplified, the segmented rotor iron core structures are completely consistent on the premise that the rotor skewed pole is realized, and the problems of high die cost, high design and manufacturing difficulty, low cost and the like of a rotor iron core punching sheet press-fitting technology are solved. And assembling and positioning are difficult due to multiple sections of iron cores.

Description

Technical Field

[0001] The utility model relates to the field of rotor cores, in particular to a segmented skew-pole motor rotor core. Background Art

[0002] The existing rotor core is a vital component of the motor. It plays the role of conducting magnets and connecting the rotating shaft. It is the power source of various machines and converts electrical energy into mechanical energy. Permanent magnets will not change the strength of magnetism according to the position and state of the motor. Therefore, during the circumferential operation, the magnetic poles of the magnets have different attractive forces on the stator teeth. The different attractive forces will cause the torque of the rotor to fluctuate during rotation, thereby causing vibration and noise during operation. The measure to reduce the noise and vibration during the operation of the motor is to reduce the tooth torque. Among them, one of the important solutions is to offset each section of the core to form a rotor skew pole, and the rotor skew pole needs to be realized through the structure of the rotor punching.

[0003] For the rotor skew pole structure, the common method is to divide the rotor into segments. Each rotor segment has keyways with different positioning and is matched with the main shaft through a flat key. In this way, each rotor segment is different, and the same model of rotor corresponds to a variety of different rotor punchings, which brings great difficulties to production. In addition, it increases the mold cost of the motor.

[0004] Therefore, it is necessary to provide a segmented skew-pole motor rotor core to solve the above technical problems. Utility Model Content

[0005] The utility model provides a segmented oblique-pole motor rotor core, which solves the problems in the background technology.

[0006] In order to solve the above technical problems, the utility model provides a segmented oblique pole motor rotor core, including a main shaft, a fixed block is fixedly connected to the main shaft, a first rotor core, a second rotor core, a third rotor core and a fourth rotor core are installed on the main shaft, a plurality of oblique grooves are provided on the first rotor core, the second rotor core, the third rotor core and the fourth rotor core, the oblique grooves on the first rotor core, the second rotor core, the third rotor core and the fourth rotor core are staggered with each other and have a preset angle, a mounting sleeve is provided on the main shaft, a threaded bolt is provided on the mounting sleeve, and a threaded hole is provided on the main shaft.

[0007] Preferably, the threaded bolt is matched with the threaded hole, the threaded bolt is threadedly connected in the threaded hole, and the mounting sleeve is matched with the main shaft.

[0008] Preferably, the number of the inclined slots is 2p, where p is an integer not less than 1, and the inclined slots are evenly distributed along the circumferential direction of the rotor core.

[0009] Preferably, a plurality of positioning blocks are provided on one side of the first rotor core, the second rotor core, the third rotor core and the fourth rotor core, and a plurality of positioning grooves are provided on the other side of the first rotor core, the second rotor core, the third rotor core and the fourth rotor core, and the number of the positioning blocks is the same as the number of the inclined grooves.

[0010] Preferably, the number of the positioning grooves is the same as the number of the positioning blocks, and the positioning grooves are adapted to the positioning blocks.

[0011] Preferably, the positioning blocks on the first rotor core, the second rotor core, the third rotor core and the fourth rotor core are all located on the same axis, and the positioning blocks and the positioning grooves are located on the same axis.

[0012] Compared with the related art, the segmented skew-pole motor rotor core provided by the utility model has the following beneficial effects:

[0013] The utility model provides a segmented oblique pole motor rotor core, wherein a first rotor core, a second rotor core, a third rotor core and a fourth rotor core are sleeved on a main shaft, and the fourth rotor core is made to abut against a fixed block, and then the first rotor core, the second rotor core, the third rotor core and the fourth rotor core are positioned by plugging between a positioning block and a positioning groove, so that the oblique grooves are staggered at a preset angle, and then a mounting sleeve is sleeved on the main shaft to tightly abut against the first rotor core, and finally a threaded bolt is screwed into a threaded hole to be fixed, thereby simplifying the rotor segmented oblique pole structure and the assembly process of the rotor core. Under the premise of realizing the rotor oblique pole, the segmented rotor core structure is completely consistent, and the problems of high mold cost, high difficulty in design and production, and assembly positioning difficulty caused by multiple-segment cores in the rotor core punching press-fitting technology are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of a preferred embodiment of a segmented skew-pole motor rotor core provided by the utility model;

[0015] Figure 2 for Figure 1 A side cross-sectional view of the first rotor core shown;

[0016] Figure 3 for Figure 1 A schematic diagram of the disassembly of each rotor core is shown;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the main shaft shown.

[0018] Numbers in the figure: 1, main shaft; 2, fixing block; 3, first rotor core; 4, second rotor core; 5, third rotor core; 6, fourth rotor core; 7, inclined groove; 8, mounting sleeve; 9, threaded bolt; 10, threaded hole; 11, positioning block; 12, positioning groove. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0020] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a segmented skew-pole motor rotor core provided by the utility model; Figure 2 for Figure 1 A side cross-sectional view of the first rotor core shown; Figure 3 for Figure 1 A schematic diagram of the disassembly of each rotor core is shown; Figure 4 for Figure 1 The schematic diagram of the structure of the main shaft is shown. The rotor core of the segmented oblique pole motor comprises a main shaft 1, to which a fixing block 2 is fixedly connected, and a first rotor core 3, a second rotor core 4, a third rotor core 5 and a fourth rotor core 6 are mounted on the main shaft 1, and a plurality of oblique grooves 7 are provided on the first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6, and the oblique grooves 7 on the first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6 are staggered with each other and have a preset angle, and a mounting sleeve 8 is provided on the main shaft 1, and a threaded bolt 9 is provided on the mounting sleeve 8, and a threaded hole 10 is provided on the main shaft 1.

[0021] The threaded bolt 9 is matched with the threaded hole 10 , the threaded bolt 9 is threadedly connected in the threaded hole 10 , and the mounting sleeve 8 is matched with the main shaft 1 .

[0022] The number of the inclined slots 7 is 2p, where p is an integer not less than 1, and the inclined slots 7 are evenly distributed along the circumferential direction of the rotor core.

[0023] A plurality of positioning blocks 11 are provided on one side of the first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6, and a plurality of positioning grooves 12 are provided on the other side of the first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6, and the number of the positioning blocks 11 is the same as the number of the inclined grooves 7.

[0024] By making the number of positioning blocks 11 consistent with that of the inclined slots 7, the positioning blocks 11 and the inclined slots 7 are distributed along the axis of the rotor core, so that at any angle, it is only necessary to dock the positioning blocks 11 with the positioning slots 12, and the inclined slots 7 on each rotor core are staggered at a preset angle.

[0025] A positioning block 11 is also provided on one side of the fixing block 2 for positioning the fourth rotor core 6 .

[0026] The number of the positioning grooves 12 is the same as the number of the positioning blocks 11 , and the positioning grooves 12 are adapted to the positioning blocks 11 .

[0027] The positioning blocks 11 on the first rotor core 3 , the second rotor core 4 , the third rotor core 5 and the fourth rotor core 6 are all located on the same axis, and the positioning blocks 11 and the positioning grooves 12 are located on the same axis.

[0028] Through the positioning of the positioning block 11 and the positioning groove 12, after the first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6 are assembled, the inclined grooves 7 on each rotor core can be automatically staggered by a preset angle, thereby reducing the difficulty of assembly.

[0029] The working principle of the segmented skew-pole motor rotor core provided by the utility model is as follows:

[0030] The first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6 are sleeved on the main shaft 1, and the fourth rotor core 6 is made to abut against the fixing block 2. Then, the first rotor core 3, the second rotor core 4, the third rotor core 5 and the fourth rotor core 6 are positioned by plugging between the positioning block 11 and the positioning groove 12, so that the inclined groove 7 is staggered at a preset angle. Then, the mounting sleeve 8 is sleeved on the main shaft 1 and pressed against the first rotor core 3, and finally, the threaded bolt 9 is screwed into the threaded hole 10 for fixing.

[0031] Compared with the related art, the segmented skew-pole motor rotor core provided by the utility model has the following beneficial effects:

[0032] The first rotor core, the second rotor core, the third rotor core and the fourth rotor core are sleeved on the main shaft, and the fourth rotor core is made to abut against the fixed block. Subsequently, the first rotor core, the second rotor core, the third rotor core and the fourth rotor core are positioned by plugging the positioning block and the positioning groove, so that the inclined grooves are staggered at a preset angle. Subsequently, the mounting sleeve is sleeved on the main shaft and pressed against the first rotor core, and finally fixed by screwing the threaded bolt into the threaded hole. This simplifies the rotor segmented oblique pole structure and the assembly process of the rotor core. Under the premise of realizing the rotor oblique pole, the segmented rotor core structure is completely consistent, avoiding the problems of high mold cost, high design and production difficulty of the rotor core punching press technology, and assembly positioning difficulties caused by multiple-segment cores.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A segmented skew-pole motor rotor core, comprising a main shaft (1), characterized in that: A fixing block (2) is fixedly connected to the main shaft (1); a first rotor core (3), a second rotor core (4), a third rotor core (5) and a fourth rotor core (6) are mounted on the main shaft (1); a plurality of inclined slots (7) are provided on the first rotor core (3), the second rotor core (4), the third rotor core (5) and the fourth rotor core (6); the inclined slots (7) on the first rotor core (3), the second rotor core (4), the third rotor core (5) and the fourth rotor core (6) are staggered with each other and have a preset angle; a mounting sleeve (8) is provided on the main shaft (1); a threaded bolt (9) is provided on the mounting sleeve (8); and a threaded hole (10) is provided on the main shaft (1).

2. The segmented skew-pole motor rotor core according to claim 1, characterized in that: The threaded bolt (9) is matched with the threaded hole (10), the threaded bolt (9) is threadedly connected in the threaded hole (10), and the mounting sleeve (8) is matched with the main shaft (1).

3. The segmented skew-pole motor rotor core according to claim 1, characterized in that: The number of the inclined slots (7) is 2p, where p is an integer not less than 1, and the inclined slots (7) are evenly distributed along the circumferential direction of the rotor core.

4. The segmented skew-pole motor rotor core according to claim 1, characterized in that: A plurality of positioning blocks (11) are provided on one side of the first rotor core (3), the second rotor core (4), the third rotor core (5) and the fourth rotor core (6); a plurality of positioning slots (12) are provided on the other side of the first rotor core (3), the second rotor core (4), the third rotor core (5) and the fourth rotor core (6); the number of the positioning blocks (11) is the same as the number of the inclined slots (7).

5. The segmented skew-pole motor rotor core according to claim 4, characterized in that: The number of the positioning grooves (12) is the same as the number of the positioning blocks (11), and the positioning grooves (12) are adapted to the positioning blocks (11).

6. The segmented skew-pole motor rotor core according to claim 4, characterized in that: The positioning blocks (11) on the first rotor core (3), the second rotor core (4), the third rotor core (5) and the fourth rotor core (6) are all located on the same axis, and the positioning blocks (11) and the positioning grooves (12) are located on the same axis.

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