Motor rotor assembly

Abstract

The utility model discloses a motor rotor assembly, which comprises a rotor core, a coil and a rotating shaft, the rotor core is fixed on the rotating shaft, the coil is wound on the outer surface of the rotor core, a first end cover and a second end cover are sleeved on the rotating shaft, and the rotor core is positioned between the first end cover and the second end cover. The arc-shaped claw plates on the first end cover and the arc-shaped claw plates on the second end cover are arranged in an up-and-down staggered mode, and a corrugated gap notch is formed between the two arc-shaped claw plates which are arranged in an up-and-down staggered mode. According to the structure of the utility model, the rotor core is located between the first end cover and the second end cover, the circular edges of the two end covers are provided with a plurality of arc-shaped claw plates in a surrounding manner, the arc-shaped claw plates of the first end cover and the second end cover are arranged in a staggered manner, and a corrugated gap notch is formed between the two arc-shaped claw plates which are staggered up and down. The inner walls of the arc-shaped claw plates are provided with inclined flow channels, so that the heat dissipation effect of the periphery of the coil is improved in the rotating movement process of the rotor iron core.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor assembly technology, specifically to a motor rotor assembly. Background Technology

[0002] Motors typically generate a significant amount of heat during operation, especially at the rotor assembly. Overheating of the rotor assembly can negatively impact motor efficiency. Existing rotor assembly cooling methods often rely on surface cooling, which is insufficient for effectively dissipating heat from the internal rotor assembly. When current flows through the coils on the rotor core, resistance causes the coils to heat up to some extent. Furthermore, friction between the rotor and stator, along with air resistance, leads to energy loss, which is also converted into heat. Overheating affects motor efficiency and shortens its lifespan, thus requiring effective heat dissipation. Common cooling methods often involve installing cooling fan blades at the shaft, preventing direct airflow to the coils. The exposed coils lack protective structures and are easily damaged. Therefore, this solution provides a motor rotor assembly. Utility Model Content

[0003] The purpose of this invention is to provide a motor rotor assembly to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a motor rotor assembly, comprising a rotor core, a coil, and a shaft. The rotor core is fixed on the shaft, and a coil is wound around the outer surface of the rotor core. A first end cover and a second end cover are sleeved on the shaft. The rotor core is located between the first end cover and the second end cover. A cooling fan blade is fixedly installed on the shaft. Several arc-shaped claw plates are arranged around the circular edges of the first end cover and the second end cover. The arc-shaped claw plates on the first end cover and the second end cover are staggered vertically, and a corrugated gap groove is formed between the two staggered arc-shaped claw plates. The arc-shaped claw plates are located outside the coil, and a heat dissipation slot is provided on the top of the arc-shaped claw plates.

[0005] Preferably, the surfaces of the first end cap and the second end cap are provided with a plurality of waist-shaped through holes, which are arranged in a grid pattern.

[0006] Preferably, the first end cover has an inclined flow channel on the inner wall facing the rotor core, and the heat dissipation slot at the top of the arc-shaped claw plate is connected to the flow channel on the inner wall.

[0007] Beneficial effects

[0008] This utility model provides a motor rotor assembly, which has the following beneficial effects:

[0009] The utility model discloses a rotor core is located between first end cover and second end cover, is provided with a plurality of arc claw board around the circular edge of two end covers, plays the role of protecting the coil, and the arc claw board of first end cover and second end cover two places is set mutually staggered, and the wave -shaped clearance slot is formed between the two arc claw boards of staggered up and down, and the inclined flow channel is opened on the surface of arc claw board and the inner wall, so that the rotor core is in the rotary motion process, and the flowing airflow of cooperation heat dissipation fan blade improves the heat dissipation effect of the coil around. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0011] Fig. 2 It is the first end cover structure schematic diagram of the utility model;

[0012] In the drawing: 1, rotor core;2, coil;3, rotating shaft;4, first end cover;5, second end cover;6, heat dissipation fan leaf;7, arc claw board;8, waist type through -hole;9, flow channel. DETAILED DESCRIPTION

[0013] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making the creative labor all belong to the range of protection of the utility model.

[0014] Please refer to Figs. 1-2 The utility model provides a kind of technical scheme: a motor rotor assembly, including rotor core 1, coil 2 and rotating shaft 3, rotor core 1 is fixed on rotating shaft 3, coil 2 is wound on the outer surface of rotor core 1, first end cover 4 and second end cover 5 are sleeved on rotating shaft 3, rotor core 1 is located between first end cover 4 and second end cover 5, heat dissipation fan leaf 6 is fixedly installed on rotating shaft 3, a plurality of arc claw board 7 is provided around the circular edge of first end cover 4 and second end cover 5, the arc claw board 7 on first end cover 4 and the arc claw board 7 on second end cover 5 are set up up and down staggered, wave -shaped clearance slot is formed between the two arc claw boards 7 of up and down staggered, arc claw board 7 is located on the outside of coil 2, and heat dissipation groove 10 is arranged on the top of arc claw board 7.

[0015] The surface of first end cover 4 and second end cover 5 is all opened with a plurality of waist type through -holes 8, and multiple waist type through -holes 8 are arranged in "well" shape.

[0016] An inclined flow channel 9 is provided on the inner wall of the first end cover 4 facing the rotor core 1, and the heat dissipation slot 10 on the top of the arc claw plate 7 is connected to the flow channel 9 on the inner wall.

[0017] The rotor core 1 is fixed on the rotating shaft 3. The rotor core 1 is clamped in the center by the first end cover 4 and the second end cover 5. The first end cover 4 and the second end cover 5 are respectively fixed to the outer surfaces of the rotor core 1 on both sides by annular sleeves. The first end cover 4, the second end cover 5 and the rotor core 1 are fixed as an integral structure.

[0018] The outer side of the coil 2 wound on the rotor core 1 is protected by several arc-shaped claw plates 7 on the edges of the first end cover 4 and the second end cover 5. The multiple arc-shaped claw plates 7 on the two end covers are staggered and a corrugated gap heat dissipation groove is formed between the two staggered arc-shaped claw plates 7.

[0019] When the coil 2 wound on the rotor core 1 is energized, it generates a rotating magnetic field, which interacts with the magnetic field on the external stator, causing the rotor core 1 to rotate. This causes the shaft 3, the first end cover 4, the second end cover 5, and the cooling fan blades 6 fixed on the shaft 3 to rotate as a whole. During the rotation, some of the heat generated by the coil 2 wound on the rotor core 1 is directly discharged from the corrugated gap slots formed between the interlocking arc claw plates 7. In the moving state, some airflow will circulate in the flow channel 9 on the inner wall of the arc claw plate 7, which improves the heat dissipation effect on the side of the coil 2.

[0020] Both the first end cap 4 and the second end cap 5 are provided with "well"-shaped waist-shaped through holes 8, so that the heat of the coil 2 near the end cap can be dissipated through the waist-shaped through holes 8. The airflow blown out by the heat dissipation fan blades 6 can also flow from the heat dissipation slots 10 on the surface of the arc claw plate 7 to the flow channel 9, and then blow towards the area around the coil 2, which improves the air circulation rate and makes the heat dissipation effect better.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A motor rotor assembly, comprising a rotor core (1), a coil (2), and a shaft (3), characterized in that, The rotor core (1) is fixed on the rotating shaft (3). A coil (2) is wound on the outer surface of the rotor core (1). A first end cover (4) and a second end cover (5) are sleeved on the rotating shaft (3). The rotor core (1) is located between the first end cover (4) and the second end cover (5). A heat dissipation fan blade (6) is fixedly installed on the rotating shaft (3). Several arc-shaped claw plates (7) are arranged around the circular edges of the first end cover (4) and the second end cover (5). The arc-shaped claw plates (7) on the first end cover (4) and the arc-shaped claw plates (7) on the second end cover (5) are staggered vertically. A corrugated gap groove is formed between the two staggered arc-shaped claw plates (7). The arc-shaped claw plates (7) are located outside the coil (2). A heat dissipation slot (10) is provided on the top of the arc-shaped claw plates (7).

2. The motor rotor assembly according to claim 1, characterized in that: The first end cap (4) and the second end cap (5) are provided with several waist-shaped through holes (8), and the multiple waist-shaped through holes (8) are arranged in a "well" shape.

3. The motor rotor assembly according to claim 2, characterized in that: The first end cap (4) has an inclined flow channel (9) on the inner wall facing the rotor core (1), and the heat dissipation slot (10) on the top of the arc claw plate (7) is connected to the flow channel (9) on the inner wall.

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