A lightweight winding structure for a hollow cup motor

Abstract

This utility model discloses a lightweight winding structure for a coreless motor, relating to the field of coil windings. The lightweight winding structure includes a coreless winding in the shape of a sleeve. One end of the coreless winding has a front end cover. On the side of the front end cover near the coreless winding, multiple connecting pieces are distributed at equal angular intervals around the axis of the front end cover. This lightweight winding structure achieves precise weight reduction of the front end cover by opening a first lightweight slot at the position directly opposite the end of the coreless winding and a second lightweight slot on the outer edge. This reduces the added mass of the rotor, thereby reducing rotational inertia, decreasing energy consumption during high-frequency start-stop and high-speed rotation, and improving the motor's response speed and power density.

Description

Technical Field

[0001] This utility model relates to the field of coil windings, and in particular to a lightweight winding structure for a hollow cup motor. Background Technology

[0002] Coreless motors offer advantages such as coreless operation, low inertia, and fast response, making them widely used in precision drive applications. Traditional coreless motors typically have a solid front cover, which, while fulfilling functions like winding support and commutator mounting, becomes a key factor limiting the motor's power density and dynamic performance. Especially in high-frequency start-stop or high-speed rotation scenarios, the extra mass of the front cover increases the rotor's rotational inertia, leading to increased energy consumption and lag. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a lightweight winding structure for a hollow cup motor, solving the problem of increased rotor energy consumption and delayed response caused by the heavy weight of the front end cover in traditional coil windings.

[0004] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0005] A lightweight winding structure for a coreless motor includes a coreless winding in the form of a sleeve. One end of the coreless winding is connected to a front end cover. Several first lightweight slots are formed on the portion of the front end cover facing the end of the coreless winding. A commutator is installed in the middle of the front end cover. The inner wall of the first lightweight slot facing away from the end of the coreless winding is rounded. The first lightweight slot is arc-shaped, and both ends of its inner wall are arc-shaped.

[0006] Optionally, the front cover is located on the side near the hollow cup winding. Multiple sleeve pieces are distributed at equal angles around the axis of the front cover. Each sleeve piece is arc-shaped. The outer periphery of the multiple sleeve pieces together forms a circular outer facade. The hollow cup winding is sleeved on the outside of the outer facade.

[0007] Optionally, on the inner ring portion of the front cover near the socket piece, multiple partition pieces are distributed at equal angular intervals around the axis of the front cover. The bent end of each commutator piece is inserted between two adjacent partition pieces, and the partition pieces, socket pieces, and front cover are integrated as one piece.

[0008] Optionally, the outer edge of the front cover away from the hollow cup winding is provided with a plurality of second lightweight grooves at equal angles around the axis of the front cover. The two openings of the second lightweight grooves pass through the side of the front cover away from the hollow cup winding and the outer periphery of the front cover, respectively. The inner wall of the second lightweight groove near the axis of the front cover is arc-shaped.

[0009] Compared with the prior art, the advantages of this utility model are as follows:

[0010] 1. This utility model achieves precise weight reduction of the front cover by opening a first lightweight groove at the position of the front cover directly opposite the end of the hollow cup winding and opening a second lightweight groove on the outer edge, thereby reducing the added mass of the rotor, thus achieving the effects of reducing rotational inertia, reducing energy consumption during high-frequency start-stop and high-speed rotation, and improving motor response speed and power density.

[0011] 2. This utility model uses multiple socket pieces to form an annular outer surface for hollow cup winding to be socketed, which maintains stable support for the winding while reducing weight, thus achieving a more precise weight reduction effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the front cover structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the separator structure of this utility model.

[0015] Reference numerals in the attached drawings: 1. Hollow cup winding; 2. Front end cover; 3. Connecting piece; 4. First lightweight slot; 5. Second lightweight slot; 6. Separator; 7. Commutator; 701. Commutator segment. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Please see Figures 1 to 3 This embodiment provides a lightweight winding structure for a hollow cup motor, including a hollow cup winding 1, which is sleeve-shaped. One end of the hollow cup winding 1 is provided with a front end cover 2. The front end cover 2 is close to the side of the hollow cup winding 1. Multiple connecting pieces 3 are distributed at equal angles around the axis of the front end cover 2. Each connecting piece 3 is arc-shaped. The outer periphery of the multiple connecting pieces 3 together forms a ring-shaped outer surface. The hollow cup winding 1 is sleeved on the outer side of the outer surface. The arc curvature of the connecting pieces 3 fits the inner wall of the hollow cup winding 1, transforming the surface contact into a multi-point line contact. Compared with the traditional solid end cover, the hollow design of the connecting pieces 3 has the effect of lightweighting and weight reduction. The continuous support structure of the ring-shaped outer surface maintains the overall torsional stiffness of the end cover.

[0018] Several first lightweight grooves 4 are formed on the portion of the front end cover 2 facing the end of the hollow cup winding 1. The inner wall of the first lightweight groove 4 facing away from the hollow cup winding 1 is rounded, and the first lightweight groove 4 is arc-shaped. The arc-shaped contour extends radially along the front end cover 2. Compared with straight grooves, it can maximize the removal of redundant material and significantly reduce the weight of the end cover. Both ends of the inner wall of the first lightweight groove 4 are arc-shaped, and the continuous arc transition avoids sharp corners, so that the load is evenly transmitted along the groove.

[0019] The outer edge of the front cover 2 facing away from the hollow cup winding 1 has multiple second lightweight grooves 5 spaced at equal angles around the axis of the front cover 2. The openings on both sides of the second lightweight grooves 5 penetrate the side of the front cover 2 facing away from the hollow cup winding 1 and the outer periphery of the front cover 2, respectively. The inner wall of the second lightweight groove 5 near the axis of the front cover 2 is arc-shaped. By setting the two lightweight grooves, the front cover 2 can be precisely reduced in weight, reducing the added mass of the rotor, thereby reducing the moment of inertia, reducing energy consumption during high-frequency start-stop and high-speed rotation, and improving the motor response speed and power density.

[0020] On the inner ring of the front cover 2 near the sleeve piece 3, multiple partition pieces 6 are distributed at equal angles around the axis of the front cover 2. A commutator 7 is inserted and fixed in the middle of the front cover 2. The bent end of each commutator piece 701 of the commutator 7 is inserted between two adjacent partition pieces 6. The partition pieces 6, sleeve piece 3 and front cover 2 are integrated. The partition pieces 6 provide interference fit preload to prevent the commutator 7 from radially shifting.

[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 lightweight winding structure of a hollow cup motor, comprising a hollow cup winding (1), the hollow cup winding (1) being sleeve-shaped, characterized in that, One end of the hollow cup winding (1) is connected to a front end cover (2). Several first lightweight slots (4) are opened on the part of the front end cover (2) facing the end of the hollow cup winding (1). A commutator (7) is installed in the middle of the front end cover (2).

2. The lightweight winding structure of the hollow cup motor according to claim 1, characterized in that, The front cover (2) is located on the side close to the hollow cup winding (1). Multiple sleeve pieces (3) are distributed at equal angles around the axis of the front cover (2). Each sleeve piece (3) is arc-shaped. The outer periphery of the multiple sleeve pieces (3) together forms a circular outer facade. The hollow cup winding (1) is sleeved on the outside of the outer facade.

3. The lightweight winding structure of the hollow cup motor according to claim 1, characterized in that, The inner wall of the first lightweight groove (4) away from the hollow cup winding (1) is rounded.

4. The lightweight winding structure of the hollow cup motor according to claim 2, characterized in that, On the inner ring portion of the front cover (2) near the sleeve piece (3), multiple partition pieces (6) are distributed at equal angular intervals around the axis of the front cover (2). The bent end of each commutator piece (701) of the commutator (7) is inserted between two adjacent partition pieces (6).

5. The lightweight winding structure of the hollow cup motor according to claim 4, characterized in that, The separator (6), the socket (3), and the front cover (2) are integrated.

6. The lightweight winding structure of the hollow cup motor according to claim 1, characterized in that, The outer edge of the front cover (2) on the side away from the hollow cup winding (1) is provided with a plurality of second lightweight grooves (5) at equal angles around the axis of the front cover (2).

7. The lightweight winding structure of the hollow cup motor according to claim 6, characterized in that, The openings on both sides of the second lightweight groove (5) pass through the side of the front cover (2) away from the hollow cup winding (1) and the outer periphery of the front cover (2), respectively.

8. The lightweight winding structure of the hollow cup motor according to claim 7, characterized in that, The inner wall of the second lightweight groove (5) near the axis of the front cover (2) is arc-shaped.

9. The lightweight winding structure of the hollow cup motor according to claim 1, characterized in that, The first lightweight groove (4) is arc-shaped, and both ends of its inner wall are arc-shaped.

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