Hot jacket cast-aluminum rotor structure and motor

Abstract

The utility model is suitable for the technical field of motor equipment, and provides a shrinkage fit cast-aluminum rotor structure, which comprises a rotating shaft sleeved with a cast-aluminum rotor. The rotating shaft comprises a rotor iron core shaft end, a rear end bearing end is arranged at one end of the rotor iron core shaft end, a shaft extension end is arranged at the other end, away from the rear end bearing end, of the rotor iron core shaft end, and a positioning step is arranged at the end, close to the rear end bearing end, of the rotor iron core shaft end; by arranging the positioning step on the rotating shaft, the position of the rotating shaft on the cast-aluminum rotor can be conveniently limited through the positioning step, the shrinkage fit process is optimized, the structure is simple, the positioning is accurate, the working efficiency of the shrinkage fit process is improved, the rework rate is greatly reduced, and more serious consequences on the performance of the motor caused by dislocation of the stator and the rotor are avoided; and the defective rate is greatly reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to motor equipment, in particular to a heat-shrink cast aluminum rotor structure and a motor. Background Art

[0002] During the factory test of the YE3-315-4 motor at the production site, there was a large no-load current (accounting for 54% of the rated current, and the required range was 25%-35%), large vibration (axial movement 3.7mm / s, required ≤2.3mm / s), and large noise (3.6dB(A) higher than the standard value, and the sound was obviously sharp and harsh). These three quality problems occurred at the same time, which is relatively rare. The machine was not disassembled on site to check and exclude the influence of power supply, foundation, machine base foot and environmental noise. No problems were found without disassembling the machine, and the next step was to disassemble the machine for inspection. First, check the axial dimension chain between the inner and outer covers of the bearing, the end cover and the machine base, and no problems were found; then check the dimension chain on the rotor, and it was found that the axial positioning dimension between the tail of the cast aluminum rotor core position to the bearing position was 7mm less than the dimension on the drawing, that is, when the cast aluminum rotor was heat-fitted, the positioning was inaccurate. This caused the stator and rotor to be misaligned by 7mm after the motor was assembled, which caused the above three unqualified items.

[0003] Currently, the cast aluminum rotor is heat-fitted using tooling for axial positioning. The operation is complicated and there are deviations in manual construction. Rework is difficult if the heat-fitting is not in place, and the rotor punchings are damaged. The number of heat-fitting tooling is huge and the cost is too high. Utility Model Content

[0004] The utility model provides a shrink-fit cast aluminum rotor structure and a motor, aiming to solve the problems of using tooling to axially position the shrink-fit cast aluminum rotor, which is complicated to operate and has deviations in manual construction; it is difficult to rework if the shrink-fit is not in place and damages the rotor punchings; and the number of shrink-fit tooling is huge and the cost is too high.

[0005] The utility model is implemented as follows: a heat-shrink cast aluminum rotor structure comprises a rotating shaft, on which a cast aluminum rotor is sleeved; the rotating shaft comprises: a rotor core shaft end, one end of the rotor core shaft end is provided with a rear end bearing end, the other end of the rotor core shaft end away from the rear end bearing end is provided with an axis extension end, and one end of the rotor core shaft end close to the rear end bearing end is provided with a positioning step.

[0006] Preferably, the distance between the bottom of the positioning step and the bottom of the rear end bearing end is L, and L is the outer detection dimension of the rotating shaft.

[0007] The beneficial effect of adopting the above further solution is that it is convenient to adjust the size according to specific requirements.

[0008] Preferably, the positioning step is in the shape of a circular ring.

[0009] The beneficial effect of adopting the above further solution is: it is convenient to adapt to the contact of the cast aluminum rotor.

[0010] Preferably, the outer radius of the positioning step is greater than the radius of the shaft end of the rotor core, and the range is 3-5 mm.

[0011] The beneficial effect of adopting the above further solution is: it is convenient to limit the position of the rotating shaft on the cast aluminum rotor through the positioning step.

[0012] Preferably, a rotor hole is provided on the cast aluminum rotor, and the rotor hole penetrates through the upper and lower end faces of the cast aluminum rotor.

[0013] The beneficial effect of adopting the above further solution is: it can effectively ensure that the rotating shaft is vertically installed in the cast aluminum rotor.

[0014] Preferably, the rotor hole and the positioning step are mutually adapted.

[0015] The beneficial effect of adopting the above further solution is: through the mutual adaptation of the rotor hole and the positioning step, the axial positioning is ensured to be accurate.

[0016] Preferably, the assembly of the rotating shaft and the cast aluminum rotor adopts a hot sleeve process.

[0017] The beneficial effect of adopting the above further solution is: to ensure the stable installation of the rotor.

[0018] The present utility model also provides a motor, including the above-mentioned hot sleeve cast aluminum rotor structure.

[0019] Compared with the prior art, the beneficial effect of the present utility model is: for the hot sleeve cast aluminum rotor structure and the motor of the present utility model, by providing a positioning step on the rotating shaft, it is convenient to limit the position of the rotating shaft on the cast aluminum rotor through the positioning step, optimizing the hot sleeve process. This structure is simple, the positioning is accurate, the working efficiency of the hot sleeve process is improved, the rework rate is greatly reduced, the more serious consequences caused by the misalignment of the stator and rotor to the motor performance are avoided, the defective rate is greatly reduced, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is Figure 1 the schematic structural diagram of the rotating shaft in

[0022] In the figure: 1, rotating shaft; 11, shaft end of rotor core; 12, rear bearing end; 13, shaft extension end; 14, positioning step; 2, cast aluminum rotor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0025] See also Figure 1-2 The utility model provides a heat-shrink cast aluminum rotor structure and a motor technical solution: a heat-shrink cast aluminum rotor structure, comprising a rotating shaft 1, on which a cast aluminum rotor 2 is sleeved;

[0026] The rotating shaft 1 includes: a rotor core shaft end 11, one end of the rotor core shaft end 11 is provided with a rear end bearing end 12, the other end of the rotor core shaft end 11 away from the rear end bearing end 12 is provided with an shaft extension end 13, and the end of the rotor core shaft end 11 close to the rear end bearing end 12 is provided with a positioning step 14.

[0027] In this embodiment, a positioning step 14 is provided on the rotating shaft 1, which is convenient for limiting the position of the rotating shaft 1 on the cast aluminum rotor 2 through the positioning step 14, thereby optimizing the shrink fitting process. The structure is simple and the positioning is precise, which improves the working efficiency of the shrink fitting process, greatly reduces the rework rate, avoids more serious consequences on the motor performance due to the misalignment of the stator and rotor, greatly reduces the defective rate, and reduces the production cost.

[0028] Further; the bottom of the positioning step 14 and the bottom end of the rear end bearing end 12 is spaced L, where L is the outer detection dimension of the shaft.

[0029] In this embodiment, the distance L between the positioning step 14 and the rear end bearing end 12 is the outer inspection point size of the shaft and is adjusted according to the specific required size.

[0030] Typically, the positioning step 14 is in the shape of a ring.

[0031] In this embodiment, a circular ring-shaped positioning step 14 is provided to facilitate the contact of the cast aluminum rotor 2 .

[0032] Specifically, the outer circle radius of the positioning step 14 is greater than the radius of the shaft end 11 of the rotor core, and the range is 3 - 5 mm.

[0033] In this embodiment, since the outer circle radius of the positioning step 14 is greater than the radius of the shaft end 11 of the rotor core, it is convenient to limit the position of the rotating shaft 1 on the cast aluminum rotor 2 through the positioning step 14.

[0034] In addition, a rotor hole is provided on the cast aluminum rotor 2, and the rotor hole penetrates through the upper and lower end faces of the cast aluminum rotor 2.

[0035] In this embodiment, by passing the rotating shaft 1 through the rotor hole to penetrate the cast aluminum rotor 2, and making the end face of the positioning step 14 fit with the upper end face of the cast aluminum rotor 2, it can effectively ensure that the rotating shaft 1 is vertically installed inside the cast aluminum rotor 2.

[0036] In addition, the rotor hole and the positioning step 14 are mutually adapted.

[0037] In this embodiment, by the mutual adaptation of the rotor hole and the positioning step 14, accurate axial positioning is ensured.

[0038] It should be noted that the assembly of the rotating shaft 1 and the cast aluminum rotor 2 adopts a hot sleeve process.

[0039] In this embodiment, by hoisting the rotating shaft 1 and placing it into the heated cast aluminum rotor 2, stable installation of the rotor is ensured.

[0040] The present utility model also provides a motor, including the above-mentioned hot sleeve cast aluminum rotor structure.

[0041] The working principle and usage process of the present utility model: After the present utility model is installed, a step is machined on the iron core position of the rotating shaft. Taking the distance from the rear end face of the positioning step 14 to the rear bearing end 12 as the axial positioning dimension, the outer circle of the positioning step 14 is 3 - 5 mm higher than the shaft end of the rotor core. The lower part of the cast aluminum rotor 2 is padded to a height sufficient to ensure that the shaft extension end 13 of the rotating shaft 1 does not touch the ground after hot sleeving. Hoist the rotating shaft 1 and place it into the heated cast aluminum rotor 2 until the step abuts against the end face of the rotor core. By utilizing the existing high machining level and high precision, combined with the special inspection requirements for this dimension of the rotating shaft, the accuracy of this axial positioning dimension can be ensured.

[0042] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model. Other devices using the same or similar ones are all within the protection scope of the present utility model.

Claims

1. A hot-sleeved cast aluminum rotor structure, characterized in that: It comprises a rotating shaft (1), on which a cast aluminum rotor (2) is sleeved; The rotating shaft (1) comprises: a rotor core shaft end (11), one end of the rotor core shaft end (11) is provided with a rear end bearing end (12), the other end of the rotor core shaft end (11) away from the rear end bearing end (12) is provided with an extension end (13), and one end of the rotor core shaft end (11) close to the rear end bearing end (12) is provided with a positioning step (14).

2. The structure of a hot-sleeved cast aluminum rotor according to claim 1, characterized in that: The distance between the bottom of the positioning step (14) and the bottom of the rear end bearing end (12) is L, and L is the external detection dimension of the rotating shaft.

3. A hot-sleeved cast aluminum rotor structure according to claim 1, characterized in that: The positioning step (14) is in the shape of a circular ring.

4. A hot-sleeved cast aluminum rotor structure according to claim 1, characterized in that: The outer circle radius of the positioning step (14) is greater than the radius of the rotor core shaft end (11), and is in the range of 3-5 mm.

5. A hot - sleeved cast - aluminum rotor structure according to claim 1, characterized in that: The cast aluminum rotor (2) is provided with a rotor hole, and the rotor hole passes through the upper and lower end surfaces of the cast aluminum rotor (2).

6. A hot - sleeved cast - aluminum rotor structure according to claim 5, characterized in that: The rotor hole and the positioning step (14) are adapted to each other.

7. A hot-sleeved cast aluminum rotor structure according to claim 1, characterized in that: The rotating shaft (1) and the cast aluminum rotor (2) are assembled using a shrink-fit process.

8. A motor, characterized in that, A heat-shrink cast aluminum rotor structure comprising any one of claims 1-7.

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