Hollow cup motor rotor and hollow cup brushless motor

Abstract

The utility model relates to the technical field of brushless motors, and discloses a coreless motor rotor and a coreless brushless motor, on one hand, the coreless motor rotor comprises a rotating shaft, a rotor core sleeved on the outer side of the rotating shaft and a magnetic steel unit arranged on the outer side of the rotor core, and the magnetic steel unit comprises a plurality of mounting blocks; the plurality of mounting blocks are circumferentially distributed around the central axis of the rotating shaft, the plurality of mounting blocks are respectively and correspondingly arranged on each outer side surface of the rotor core, each outer side surface of the rotor core is provided with a limiting groove, the limiting grooves are arranged along the axis of the rotating shaft in a penetrating manner, and the inner sides of the mounting blocks are provided with limiting convex blocks matched with the limiting grooves; on the one hand, the coreless brushless motor comprises a coreless motor rotor and a stator assembly arranged on the outer side of the coreless motor rotor, the coreless brushless motor comprises a coreless motor rotor and a stator assembly arranged on the outer side of the coreless motor rotor, and the coreless brushless motor is arranged on the coreless motor rotor. The stator assembly comprises a stator punching sheet and a winding cup fixed on the inner side of the stator punching sheet.

Description

TECHNICAL FIELD

[0001] The utility model relates to brushless motor technical field especially hollow cup motor rotor and hollow cup brushless motor. BACKGROUND

[0002] Brushless hollow cup motor has the advantages of small volume, high speed and sensitive reaction, and is widely used in fields such as miniature power model, precision power output device or bionic artificial limb; most of the brushless hollow cup motors on the market are provided with a plurality of magnetic elements on the center rotor, and the rotor is driven to rotate by magnetic field change.

[0003] However, in the process of assembling the rotor assembly of the current brushless hollow cup motor, each magnetic element is assembled along the rotating shaft one by one, and only the assembly tolerance between the adjacent two magnetic elements can be overcome as much as possible, while the tolerance between the previously assembled magnetic elements is concentrated in the assembly position of the last magnetic element, that is, the assembly tolerance between the last magnetic element and the first magnetic element is large, thereby causing the overall magnetic force of the rotor assembly to be unbalanced, the overall vibration amount is large, and the running stability of the motor is low. SUMMARY

[0004] The utility model solves the technical problems of the prior art, provides hollow cup motor rotor and hollow cup brushless motor, and improves the running stability of the motor.

[0005] The technical scheme of the utility model is as follows: on the one hand, the utility model provides a hollow cup motor rotor, which comprises a rotating shaft, a rotor core arranged outside the rotating shaft, and a magnetic element unit arranged outside the rotor core, the magnetic element unit comprises a plurality of mounting blocks, the mounting blocks are circumferentially distributed around the central axis of the rotating shaft, the mounting blocks are respectively arranged on each outer side surface of the rotor core, each outer side surface of the rotor core is provided with a limiting groove, the limiting groove is arranged through along the axis of the rotating shaft, the inside of the mounting block is provided with a limiting protrusion matched with the limiting groove, and the assembling surfaces are symmetrically arranged on the left and right sides of the mounting block.

[0006] From the above scheme, it can be seen that the limiting protrusion on the mounting block is matched with the limiting groove on the surface of the rotor core, so that the assembly tolerance between the adjacent two mounting blocks does not affect the assembly of the subsequent mounting blocks, the assembly tolerance is not accumulated, the spacing between the last assembled mounting block and its adjacent two mounting blocks is prevented from being too large, and the stability of the hollow cup motor rotor during rotation is improved.

[0007] Balancing blocks are arranged at both ends of the rotating shaft, and the balancing blocks are connected to the end surface of the magnetic element unit.

[0008] The outer side of the mounting block is provided with a circular arc surface, and the outer circumferential surface of the balance block is coplanar with the outer circumferential surface of the magnetic unit.

[0009] The rotor core is provided in a tetrahedron shape, and the mounting block is correspondingly provided with four groups.

[0010] In another aspect, the utility model provides a hollow cup brushless motor, including motor shell, hollow cup motor rotor and stator assembly outside hollow cup motor rotor, hollow cup motor rotor rotation setting in motor shell. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the explosion map of hollow cup motor rotor;

[0012] Fig. 2 It is the structural schematic diagram of hollow cup motor rotor;

[0013] Fig. 3 It is the structural schematic diagram of hollow cup motor rotor from another perspective;

[0014] Fig. 4 It is the sectional view of hollow cup motor rotor. DETAILED DESCRIPTION

[0015] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.

[0016] As Figs. 1 to 4 As shown in the drawing, in one aspect, the utility model discloses a hollow cup motor rotor, including the pivot 1, the rotor core 2 of setting in the pivot 1 outside and the magnetic unit 3 of setting in the rotor core 2 outside, the rotor core 2 is with the pivot 1 interference fit, the magnetic unit 3 includes several mounting blocks 31, and several mounting blocks 31 are with the center axis of pivot 1 circumferential distribution, and several mounting blocks 31 are correspondingly installed on each outer side surface of rotor core 2 respectively, and each outer side surface of rotor core 2 is provided with limiting slot 21, limiting slot 21 is through setting along the axis of pivot 1, the inner side of mounting block 31 is provided with the limiting lug 311 of adapting with limiting slot 21, and the assembling surface 312 of mounting block 31 both sides is provided with the assembling surface 312 of mounting block 31 left side, and the assembling surface 312 of other mounting block 31 right side is adapted.In this embodiment, the pivot 1 and the rotor core 2 are fixed by structural glue, and the magnetic unit 3 and the rotor core 2 are fixed by structural glue.

[0017] The balance block 4 is connected to the end face of the magnetic single unit 3, the outer side of the mounting block 31 is provided with a circular arc surface, the outer circumferential surface of the balance block 4 is coplanar with the outer circumferential surface of the magnetic single unit 3, the number of the mounting blocks 31 is matched with the number of the outer side faces of the rotor core 2, the rotor core 2 is provided with four groups of outer side faces, and the mounting blocks 31 are correspondingly provided with four groups of mounting blocks 31.

[0018] In another aspect, the utility model discloses a hollow cup brushless motor, including motor shell, the hollow cup motor rotor and the stator subassembly of setting in the hollow cup motor rotor outside, the hollow cup motor rotor rotation setting in the motor shell is.In this embodiment, a layer of glass silk band is wound on the outer circumferential surface of the magnetic single unit 3, which is used to prevent the mounting block 31 from falling off under the centrifugal action when rotating, and the stator subassembly includes a stator lamination and a winding cup fixed to the inner side of the stator lamination.

[0019] Finally, it needs to be emphasized that the above description is not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A hollow cup motor rotor, comprising a rotating shaft (1), a rotor core (2) sleeved outside the rotating shaft (1), and a magnetic unit (3) arranged outside the rotor core (2), characterized in that: The magnetic pole unit (3) comprises a plurality of mounting blocks (31), the mounting blocks (31) are circumferentially distributed along the central axis of the rotating shaft (1), the mounting blocks (31) are respectively arranged on each outer side of the rotor core (2), each outer side of the rotor core (2) is provided with a limiting groove (21), the limiting groove (21) is provided along the axis of the rotating shaft (1), the inner side of the mounting block (31) is provided with a limiting protrusion (311) matched with the limiting groove (21), and the assembling surfaces (312) are symmetrically arranged on the two sides of the mounting block (31), and the assembling surface (312) on the left side of the mounting block (31) is matched with the assembling surface (312) on the right side of the other mounting blocks (31).

2. A hollow cup motor rotor according to claim 1, characterized in that: The rotating shaft (1) is provided with a balance block (4) at both ends, and the balance block (4) is connected to the end face of the magnetic pole unit (3).

3. A hollow cup motor rotor according to claim 2, characterized in that: The outer side of the mounting block (31) is provided with a circular arc surface, and the outer circumferential surface of the balance block (4) is coplanar with the outer circumferential surface of the magnetic pole unit (3).

4. The hollow cup motor rotor of claim 1, wherein: The rotor core (2) is provided with four groups of outer sides, and the mounting block (31) is provided with four groups.

5. A hollow cup brushless motor comprising the hollow cup motor rotor according to any one of claims 1 to 4, characterized in that: The motor shell, the hollow cup motor rotor, and the stator assembly arranged outside the hollow cup motor rotor are included, and the hollow cup motor rotor is rotationally arranged in the motor shell.

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