Motor rotor fan blade

Abstract

The utility model provides a kind of motor rotor fan blade, belong to motor technical field.It includes the rotor shaft sleeve with through-hole, rotor shaft sleeve is equipped with rotor iron core, the both ends of the rotor iron core are equipped with the fan blade of same structure, fan blade includes the annular base plate of adhering rotor iron core end face, several U-shaped open slots are opened in annular base plate circumferentially, the area between adjacent U-shaped open slots is bent along preset crease, and the blade perpendicular to annular base plate is formed.The utility model has the advantages such as simple structure and effectively reduce manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of electric motor technology, and specifically refers to an electric motor rotor blade. Background Technology

[0002] The heat generated during motor operation can significantly affect its performance and lifespan, so installing fan blades at both ends of the rotor for forced ventilation and heat dissipation is a common design.

[0003] Existing rotor blades rely on casting or milling for forming, which is costly and inefficient. Utility Model Content

[0004] The purpose of this utility model is to provide a motor rotor fan blade with a simple structure, which is easy to fix to the end of the rotor and effectively reduces manufacturing costs.

[0005] The purpose of this utility model is achieved as follows:

[0006] A motor rotor fan blade includes a rotor bushing with a through hole, a rotor core is fitted over the rotor bushing, and fan blades with the same structure are installed at both ends of the rotor core. The fan blades include an annular base plate that fits against the end face of the rotor core. The annular base plate has several U-shaped openings in the circumferential direction. The area between adjacent U-shaped openings is bent along a preset crease to form a blade perpendicular to the annular base plate.

[0007] The present invention is further configured such that an axially extending sleeve is provided on the inner side of the annular substrate, and the outer peripheral wall of the sleeve is interference-fitted with the inner hole wall of the rotor core.

[0008] The present invention is further configured such that the annular base plate has mounting holes, and the annular base plate is fixed to the end of the rotor core by bolts or rivets passing through the mounting holes.

[0009] The present invention is further configured such that the end face of the annular substrate is fixed to the end of the rotor core by means of adhesive.

[0010] The present invention is further configured such that the end of the sleeve abuts against the end face of the rotor shaft sleeve to restrict the axial displacement of the fan blade.

[0011] The present invention is further provided that a keyway is provided on the inner wall of the through hole.

[0012] The present invention is further configured such that the top edge of the blade is a straight segment, and the straight segment is parallel to the radial direction of the rotor core.

[0013] The present invention is further configured such that the fan blade is integrally stamped or integrally injection molded from a metal sheet.

[0014] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0015] 1. The rotor blade provided by this utility model adopts a U-shaped groove and bending structure, which allows the blade to be bent into shape or injection molded in one step after being stamped from a flat plate, eliminating the need for traditional casting molds and reducing production costs.

[0016] 2. This utility model further adopts an interference fit installation method to install the fan blade, or uses bolts or rivets to fit the mounting holes for installation; or uses adhesive to fix it.

[0017] 3. In this utility model, the end of the sleeve abuts against the end face of the rotor shaft sleeve, making it less prone to axial displacement, reducing blade vibration, and ensuring quiet operation.

[0018] 4. The keyway provided by this utility model facilitates the fixing of the shaft and provides convenience for the subsequent installation of the rotor shaft.

[0019] 5. The blades provided by this utility model generate axial directional airflow, reducing noise caused by turbulence. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0023] Figure label:

[0024] 1-Rotor bushing; 10-Through hole; 11-Keyway;

[0025] 2-Rotor core;

[0026] 3-Fan blade; 30-Annular base plate; 31-U-shaped opening groove; 32-Blade; 33-Sleeve; 34-Mounting hole. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1 — Figure 3 :

[0028] A motor rotor fan blade includes a rotor bushing 1 with a through hole 10, a rotor core 2 is sleeved on the rotor bushing 1, and fan blades 3 with the same structure are installed at both ends of the rotor core 2. The fan blade 3 includes an annular base plate 30 that fits against the end face of the rotor core 2. The annular base plate 30 has several U-shaped opening slots 31 circumferentially opened, and the area between adjacent U-shaped opening slots 31 is bent along a preset crease to form a blade 32 perpendicular to the annular base plate 30.

[0029] During implementation, the blades 32 in the U-shaped slots 31 on the annular base plate 30 are folded over, and then the blades are installed at the ends of the rotor core. The blade structures provided at both ends of the rotor core are identical. This method facilitates manufacturing, eliminates the need for casting molds, and significantly reduces production costs; at the same time, its material utilization rate is higher than that of traditional methods.

[0030] Preferably, the inner side of the annular base plate 30 is provided with an axially extending sleeve 33, and the outer peripheral wall of the sleeve 33 is interference-fitted with the inner hole wall of the rotor core 2.

[0031] Preferably, the annular base plate 30 has mounting holes 34, and the annular base plate 30 is fixed to the end of the rotor core 2 by bolts or rivets passing through the mounting holes 34.

[0032] During implementation, whether using interference fit or bolts or rivets with mounting holes, the fan blades can be fixed at the ends of the rotor core.

[0033] The end face of the annular base plate 30 is fixed to the end of the rotor core 2 by adhesive. The annular base plate 30 on the fan blade can also be fixed by adhesive, which can also achieve normal operation of the fan blade.

[0034] Preferably, the end of the sleeve 33 abuts against the end face of the rotor bushing 1 to restrict the axial displacement of the fan blade 3.

[0035] In the above structure, a sleeve is provided on the inner side of the annular base plate, which can be interference-fitted with the inner hole of the rotor core. This effectively prevents displacement even under high-speed rotation. At the same time, the end of the sleeve and the end of the rotor shaft sleeve form a stop and limit, preventing axial displacement during operation.

[0036] Preferably, a keyway 11 is provided on the inner wall of the through hole 10. The keyway 11 facilitates the installation of the rotor shaft inside the bushing, enabling the shaft to stably drive the synchronous shaking of the rotor core assembly.

[0037] Preferably, the top edge of the blade 32 is a straight segment, and the straight segment is parallel to the radial direction of the rotor core 2.

[0038] The edge of the straight segment generates directional airflow, which produces a greater air volume than the curved blades.

[0039] Preferably, the fan blade 3 is integrally stamped or injection molded from a metal sheet. This ensures structural strength while making manufacturing more convenient, processing more efficient, and saving more costs.

[0040] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A motor rotor fan blade, comprising a rotor bushing (1) having a through hole (10), wherein a rotor core (2) is disposed outside the rotor bushing (1), characterized in that, The rotor core (2) is equipped with fan blades (3) with the same structure at both ends. The fan blades (3) include an annular base plate (30) that fits the end face of the rotor core (2). The annular base plate (30) has several U-shaped opening slots (31) circumferentially opened. The area between adjacent U-shaped opening slots (31) is bent along a preset crease to form blades (32) perpendicular to the annular base plate (30).

2. The motor rotor fan blade according to claim 1, characterized in that, The inner side of the annular base plate (30) is provided with an axially extending sleeve (33), and the outer peripheral wall of the sleeve (33) is interference-fitted with the inner hole wall of the rotor core (2).

3. The motor rotor fan blade according to claim 1, characterized in that, The annular base plate (30) has mounting holes (34), and the annular base plate (30) is fixed to the end of the rotor core (2) by bolts or rivets passing through the mounting holes (34).

4. The motor rotor fan blade according to claim 1, characterized in that, The end face of the annular substrate (30) is fixed to the end of the rotor core (2) by adhesive.

5. The motor rotor fan blade according to claim 2, characterized in that, The end of the sleeve (33) abuts against the end face of the rotor bushing (1) to restrict the axial displacement of the fan blade (3).

6. The motor rotor fan blade according to claim 1, characterized in that, A keyway (11) is provided on the inner wall of the through hole (10).

7. The motor rotor fan blade according to claim 1, characterized in that, The top edge of the blade (32) is a straight segment, and the straight segment is parallel to the radial direction of the rotor core (2).

8. The motor rotor fan blade according to claim 1, characterized in that, The fan blade (3) is formed by integral stamping or integral injection molding of metal sheet.

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