Axial flux motor with one-way single-point supporting bearing structure
By adopting a one-way single-point support structure in the axial flux motor, and using the radial arrangement optimization of planar bearings and ball bearings, the problems of insufficient bearing capacity and excessive size are solved, and the miniaturization and high bearing capacity of the axial flux motor are achieved.
Patent Information
- Application Number
- CN202421991346.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The bearing structure of the existing axial flux motor has the problem of limited axial bearing capacity and excessive axial size, which is difficult to meet customer needs, especially when the permanent magnet rotor generates large unilateral axial magnetic tension.
A one-way single point support structure is adopted, including a plane bearing and a ball bearing. The plane bearing and the ball bearing are arranged radially, the ball bearing are arranged radially inward, and the plane bearing is arranged radially outside. Through this layout, the number of bearings is reduced and the direction of force is optimized to enhance the axial bearing capacity.
The axial dimensions of the axial flux motor are reduced and the axial force bearing capacity is enhanced, which meets customer needs, is simple in structure, easy to install and reliable in operation.
Smart Images
Figure CN223156839U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to an axial flux motor with a unidirectional single-point support bearing structure. Background technology:
[0002] The existing axial flux motor bearing structure is that two ball bearings are distributed on both sides of the rotor, and one ball bearing is used for axial single reference positioning. The characteristics are that the bearings are arranged in different ways. Figure 1 As shown, it includes a rotor a1, a ball bearing a2, a rotor end cover a3, a stator core with winding a4, an axial force bearing ball bearing a5 and a stator end cover a6. The axial force generated between the rotor and the stator is borne by the axial force bearing ball bearing a5. Since the axial flux motor rotor uses permanent magnets, the permanent magnet rotor a1 will generate a very large unilateral axial magnetic pull on the stator core with winding a4. This requires a bearing to bear this axial force. The axial bearing capacity of the ball bearing is limited, even if an angular contact ball bearing is used. Excessive axial force must use a large-sized ball bearing. The distribution on both sides results in a longer axial dimension. The axial bearing capacity of the traditional structure axial force bearing bearing a5 is limited and cannot meet the demand.
[0003] The utility model patent with patent number: 200920189072X and patent name "disc-type synchronous motor" solves the above technical problems better, that is, a plane bearing, a first ball bearing and a second ball bearing are installed on the bearing seat of the stator end cover from top to bottom respectively, which effectively solves the technical problem that the axial bearing capacity of the axial force bearing bearing of the traditional structure is limited and cannot meet the demand. However, a new technical problem is generated at the same time: due to the use of a three-bearing structure, the axial size of the motor is too large, which does not meet the design requirements of the flat shape of the disc motor. Summary of the invention:
[0004] The utility model aims to provide an axial flux motor with a unidirectional single-point support bearing structure, which has a small axial dimension and a large axial bearing capacity of the axial force bearing bearing, thereby meeting the needs of customers.
[0005] The purpose of this utility model is achieved through the following technical solutions:
[0006] An axial flux motor with a unidirectional single-point support bearing structure comprises a rotor assembly, a rotor end cover, a stator core with a winding, a stator end cover and a bearing, wherein a bearing seat is provided on the stator end cover, and the bearing is arranged in the bearing seat of the stator end cover. The invention is characterized in that the bearing comprises a plane bearing and a ball bearing, the plane bearing and the ball bearing are radially arranged, the ball bearing is arranged on the radial inner side, and the plane bearing is arranged on the radial outer side.
[0007] Axially protruding from the bottom surface inside the above-mentioned bearing housing is a cylinder. The inner ring of the ball bearing is sleeved on the cylinder. An annular sleeve protrudes from the middle of the end face of the rotor assembly. The annular sleeve is sleeved on the outer ring of the ball bearing. The top of the plain bearing is in contact with the end face of the rotor assembly, and the bottom of the plain bearing is in contact with the bottom surface of the bearing housing.
[0008] Compared with the prior art, the present utility model has the following effects: The bearing of the axial flux motor of the present utility model includes a plain bearing and a ball bearing. The plain bearing and the ball bearing are arranged radially. The ball bearing is arranged on the radially inner side, and the plain bearing is arranged on the radially outer side. With such an arrangement, the axial dimension is small, and the axial bearing capacity of the axial force-bearing bearing is relatively large, meeting the needs of customers. Description of the drawings:
[0009] Figure 1 is a schematic structural diagram of an axial flux motor in the prior art;
[0010] Figure 2 is a three-dimensional view of the axial flux motor according to the first embodiment of the present utility model;
[0011] Figure 3 is the front view of the axial flux motor according to the first embodiment of the present utility model;
[0012] Figure 4 is Figure 3 the A-A cross-sectional view of
[0013] Figure 5 is Figure 4 the partial enlarged view of part B of Specific implementation manners:
[0014] The present utility model will be further described in detail below through specific embodiments in conjunction with the drawings.
[0015] Embodiment 1: As Figures 2 to 5 shown, the present embodiment provides an axial flux motor with a single-direction single-point support bearing structure, including a rotor assembly 1, a rotor end cover 2, a stator iron core with windings 3, a stator end cover 4, and a bearing 5. A bearing housing 41 is provided on the stator end cover 4. The bearing 5 is arranged in the bearing housing 41 of the stator end cover 4. It is characterized in that: the bearing 5 includes a plain bearing 51 and a ball bearing 52. The plain bearing 51 and the ball bearing 52 are arranged radially. The ball bearing 52 is arranged on the radially inner side, and the plain bearing 51 is arranged on the radially outer side.
[0016] Advantages of the present utility model: 1. The bearing 5 includes a plain bearing 51 and a ball bearing 52. The plain bearing 51 and the ball bearing 52 are arranged radially. The ball bearing 52 is arranged on the radial inner side, and the plain bearing 51 is arranged on the radial outer side. The bearing 5 occupies the minimum axial dimension, which is more in line with the requirement of the flatness of the disc motor; 2. One bearing is reduced, and the structure becomes simple; 3. The functions of the two bearings, i.e., the plain bearing 51 and the ball bearing 52, are clearly divided. The plain bearing 51 is used to support the great axial magnetic pulling force generated by the rotor and the stator. The ball bearing 52 ensures the radial movement of the rotor assembly 1; 4. The force directions of the two bearings, i.e., the plain bearing 51 and the ball bearing 52, are just perpendicular, which can restrain each other to ensure the position of the rotor assembly. The plain bearing 51 has very good axial bearing capacity. The axial magnetic pulling force is supported by a single point of the plain bearing 51, and all the bearings are placed in the stator end cover 4, effectively ensuring the coaxiality.
[0017] In the bottom surface 410 of the above-mentioned bearing seat 41, a cylinder 411 protrudes axially. The inner ring of the ball bearing 52 is sleeved on the cylinder 411. An annular sleeve 12 protrudes in the middle of the end surface 11 of the rotor assembly 1. The annular sleeve 12 is sleeved on the outer ring of the ball bearing 52. The top of the plain bearing 51 is in contact with the end surface 11 of the rotor assembly 1, and the bottom of the plain bearing 51 is in contact with the bottom surface 410 of the bearing seat 41. The structural design is reasonable, the installation is simple, and the operation is reliable.
[0018] The rotor assembly 1 includes a rotor core, a permanent magnet, a rotating shaft, etc.
[0019] The above embodiments are the preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model are equivalent replacement methods and are all included in the protection scope of the present utility model.
Claims
1. An axial flux motor with a unidirectional single-point support bearing structure, comprising a rotor assembly (1), a rotor end cover (2), a wound stator core (3), a stator end cover (4) and a bearing (5). A bearing seat (41) is provided on the stator end cover (4), and the bearing (5) is arranged in the bearing seat (41) of the stator end cover (4), characterized in that: The bearing (5) includes a plain bearing (51) and a ball bearing (52). The plain bearing (51) and the ball bearing (52) are arranged radially, with the ball bearing (52) disposed on the radially inner side and the plain bearing (51) disposed on the radially outer side.
2. The axial flux motor with a single-way single-point supported bearing structure according to claim 1, characterized in that: A cylinder (411) axially protrudes from the bottom surface (410) inside the bearing housing (41). The inner ring of the ball bearing (52) is sleeved on the cylinder (411). An annular sleeve (12) protrudes from the middle of the end face (11) of the rotor assembly (1). The annular sleeve (12) is sleeved on the outer ring of the ball bearing (52). The top of the plain bearing (51) is in contact with the end face (11) of the rotor assembly (1), and the bottom of the plain bearing (51) is in contact with the bottom surface (410) of the bearing housing (41).