Rotating shaft for axial flux motor

Abstract

The utility model relates to the technical field of axial magnetic flux motors, in particular to a rotating shaft for an axial magnetic flux motor, which comprises a shaft rod, an upper bearing assembly is sleeved on the surface of the top of the shaft rod, and a lower bearing assembly is sleeved on the surface of the bottom of the shaft rod. The upper bearing assembly comprises an upper ball bearing, an upper roller bearing and an upper limiting hoop, the upper ball bearing is arranged on the surface of the shaft rod in a sleeving mode, the upper roller bearing is installed on the portion, located above the upper ball bearing, of the surface of the shaft rod, and the upper limiting hoop is fixedly arranged between the upper roller bearing and the upper ball bearing in a sleeving mode. By arranging the upper bearing assembly and the lower bearing assembly, the stability of the rotating shaft during installation is improved, and by arranging the limiting hoop and the boss to limit the upper bearing assembly and the lower bearing assembly, the loosening phenomenon of the rotating shaft after long-term use is avoided, and the service life of the rotating shaft is prolonged.

Description

A rotating shaft for an axial flux motor Technical Field

[0001] This utility model relates to the field of axial flux motor technology, specifically to a rotating shaft for an axial flux motor. Background Technology

[0002] Axial flux motors have attracted attention in many low-speed, high-torque applications due to their high torque density, and are particularly suitable for electric drives of vehicles, ships and other transportation vehicles. The shaft is an important component of axial flux motors.

[0003] Currently, existing shafts are fixed using a single bearing during installation. This method is not stable enough when fixing the device, and the parts on the surface of the existing shaft are prone to loosening after installation, which causes great trouble for users. Summary of the Invention

[0004] The purpose of this invention is to provide a shaft for an axial flux motor, in order to solve the problem mentioned in the background art that the existing shafts, which are not stable enough when fixed with a single bearing, are prone to loosening.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shaft for an axial flux motor, comprising a shaft rod, an upper bearing assembly fitted on the top surface of the shaft rod, and a lower bearing assembly fitted on the bottom surface of the shaft rod, wherein the lower bearing assembly and the upper bearing assembly cooperate to provide stable support for the shaft rod when it is installed into the housing; the upper bearing assembly includes an upper ball bearing, an upper roller bearing, and an upper limit sleeve, wherein the upper ball bearing is fitted on the surface of the shaft rod, and an upper roller bearing is installed on the surface of the shaft rod above the upper ball bearing, and an upper limit sleeve is fitted and fixed between the upper roller bearing and the upper ball bearing, the upper limit sleeve being used to limit the movement of the upper ball bearing.

[0006] Preferably, a spline groove is installed at the top of the shaft surface, which facilitates the installation and positioning of the product to be rotated.

[0007] Preferably, the lower bearing assembly includes a lower ball bearing, a lower roller bearing, and a lower limiting sleeve, with the lower ball bearing fitted onto the surface of the shaft.

[0008] Preferably, a lower roller bearing is installed on the surface of the shaft and below the lower ball bearing, and a lower limiting sleeve is fitted and fixed between the lower roller bearing and the lower ball bearing. The lower limiting sleeve is used to limit the movement of the lower ball bearing.

[0009] Preferably, a boss is integrally injection molded at the center of the shaft surface, and the top surface of the boss fits into the bottom of the upper ball bearing, and the bottom surface of the boss fits into the lower ball bearing. The boss is used to limit the movement of the upper and lower ball bearings.

[0010] Preferably, keyways are provided on both sides of the surface of the boss, and a deep groove is provided on the surface of the boss below the keyways, and the deep groove communicates with the keyways. The keyways and the deep groove cooperate to limit and fasten the rotor frame during installation.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: When the axial flux motor is implemented with a rotating shaft, the rotor frame passes through the bottom of the shaft and is fitted onto the surface of the boss. At this time, the pin keyway and deep groove cooperate with the pin block of the rotor frame for limiting. Then, the lower ball bearing is fitted onto the bottom end of the shaft, followed by the stator assembly. Next, the lower limiting sleeve is fitted to limit the lower ball bearing, followed by the installation of the lower roller bearing. Then, the upper ball bearing is fitted from the top of the shaft, and the upper limiting sleeve is fitted again. The upper limiting sleeve and the boss cooperate to limit the vertical freedom of the upper ball bearing, followed by the installation of the lower roller bearing. The shaft is supported by the interference fit between the lower and upper roller bearings and the housing. This utility model increases the stability of the rotating shaft during installation by setting the upper and lower bearing assemblies. Moreover, by setting the limiting sleeve and the boss to limit the upper and lower bearing assemblies, the loosening of the rotating shaft after long-term use is avoided, thus improving the service life of the rotating shaft. Attached Figure Description

[0012] Figure 1 is a three-dimensional appearance structure diagram of this utility model;

[0013] Figure 2 is a schematic diagram of the partial explosion structure of this utility model;

[0014] Figure 3 is a schematic diagram of the exploded structure of this utility model in its upright position;

[0015] Figure 4 is a schematic diagram of the exploded structure of this utility model in an inverted state.

[0016] In the diagram: 1. Shaft; 11. Spline groove; 12. Boss; 13. Keyway; 14. Deep groove; 2. Upper bearing assembly; 21. Upper ball bearing; 22. Upper roller bearing; 23. Upper limit sleeve; 3. Lower bearing assembly; 31. Lower ball bearing; 32. Lower roller bearing; 33. Lower limit sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0018] The structure of the shaft for an axial flux motor provided by this utility model is shown in Figures 1 and 4. It includes a shaft 1, with a spline groove 11 installed at the top of the surface of the shaft 1. The spline groove 11 facilitates the installation and positioning of the product to be rotated. A boss 12 is integrally injection molded at the center of the surface of the shaft 1. The top surface of the boss 12 is in contact with the bottom of the upper ball bearing 21, and the bottom surface of the boss 12 is in contact with the lower ball bearing 31. The boss 12 is used to limit the positioning of the upper ball bearing 21 and the lower ball bearing 31. Pin keyways 13 are provided on both sides of the surface of the boss 12. A deep groove 14 is provided on the surface of the boss 12 and below the pin keyways 13. The deep groove 14 communicates with the pin keyways 13. The pin keyways 13 and the deep groove 14 cooperate to limit and fasten the rotor frame during installation.

[0019] During implementation, the rotor frame passes through the bottom of the shaft 1 and is fitted onto the surface of the boss 12. At this time, the pin keyway 13 and the deep groove 14 cooperate with the pin block of the rotor frame for positioning.

[0020] Furthermore, as shown in Figures 2 and 3, a lower bearing assembly 3 is fitted onto the bottom surface of the shaft 1. The lower bearing assembly 3 and the upper bearing assembly 2 cooperate to provide stable support for the shaft 1 when it is installed into the housing. The lower bearing assembly 3 includes a lower ball bearing 31, a lower roller bearing 32, and a lower limiting sleeve 33. The lower ball bearing 31 is fitted onto the surface of the shaft 1, and the lower roller bearing 32 is installed on the surface of the shaft 1 below the lower ball bearing 31. The outer rings of both the lower roller bearing 32 and the lower ball bearing 31 are fixed to the housing by interference fit. The lower limiting sleeve 33 is fitted and fixed between the lower roller bearing 32 and the lower ball bearing 31. The lower limiting sleeve 33 is used to limit the movement of the lower ball bearing 31.

[0021] In practice, the lower ball bearing 31 is then fitted onto the bottom end of the shaft 1, followed by the installation of the stator assembly, then the installation of the lower limiting sleeve 33 to limit the lower ball bearing 31, and finally the installation of the lower roller bearing 32.

[0022] Furthermore, as shown in Figures 3 and 4, an upper bearing assembly 2 is fitted onto the top surface of the shaft 1. The upper bearing assembly 2 includes an upper ball bearing 21, an upper roller bearing 22, and an upper limit sleeve 23. The upper ball bearing 21 is fitted onto the surface of the shaft 1, and the upper roller bearing 22 is installed on the surface of the shaft 1 above the upper ball bearing 21. The outer rings of both the upper roller bearing 22 and the upper ball bearing 21 are fixed with the housing by interference fit. An upper limit sleeve 23 is fitted and fixed between the upper roller bearing 22 and the upper ball bearing 21. The upper limit sleeve 23 is used to limit the movement of the upper ball bearing 21.

[0023] In practice, the upper ball bearing 21 is inserted from the top of the shaft 1, and then the upper limit sleeve 23 is installed. The upper limit sleeve 23 and the boss 12 cooperate to limit the vertical freedom of the upper ball bearing 21. Then the lower roller bearing 32 is installed. The shaft 1 is supported by the interference fit between the lower roller bearing 32 and the upper roller bearing 22 and the housing.

[0024] Working principle: In use, firstly, the rotor frame passes through the bottom of the shaft 1 and is fitted onto the surface of the boss 12. At this time, the pin keyway 13 and the deep groove 14 cooperate with the pin block of the rotor frame for limiting. Then, the lower ball bearing 31 is fitted onto the bottom end of the shaft 1. Next, the stator assembly is installed. Then, the lower limiting sleeve 33 is installed to limit the lower ball bearing 31. Next, the lower roller bearing 32 is installed. Then, the upper ball bearing 21 is fitted from the top of the shaft 1. Then, the upper limiting sleeve 23 is installed. The upper limiting sleeve 23 and the boss 12 cooperate to limit the vertical freedom of the upper ball bearing 21. Then, the lower roller bearing 32 is installed. The shaft 1 is supported by the interference fit between the lower roller bearing 32 and the upper roller bearing 22 and the housing.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rotating shaft for an axial flux motor, comprising a shaft (1), characterized in that: The top surface of the shaft (1) is fitted with an upper bearing assembly (2), and the bottom surface of the shaft (1) is fitted with a lower bearing assembly (3). The lower bearing assembly (3) and the upper bearing assembly (2) cooperate to provide stable support for the shaft (1) when it is installed into the housing. The upper bearing assembly (2) includes an upper ball bearing (21), an upper roller bearing (22), and an upper limit sleeve (23). The upper ball bearing (21) is fitted on the surface of the shaft (1). The upper roller bearing (22) is installed on the surface of the shaft (1) and above the upper ball bearing (21). An upper limit sleeve (23) is fitted and fixed between the upper roller bearing (22) and the upper ball bearing (21). The upper limit sleeve (23) is used to limit the upper ball bearing (21).

2. The shaft for an axial flux motor according to claim 1, characterized in that: A spline groove (11) is installed at the top of the surface of the shaft (1), which facilitates the installation and positioning of the product to be rotated.

3. The shaft for an axial flux motor according to claim 1, characterized in that: The lower bearing assembly (3) includes a lower ball bearing (31), a lower roller bearing (32), and a lower limiting sleeve (33), wherein the lower ball bearing (31) is fitted onto the surface of the shaft (1).

4. The shaft for an axial flux motor of claim 1, wherein: A lower roller bearing (32) is installed on the surface of the shaft (1) and below the lower ball bearing (31), and a lower limiting sleeve (33) is fitted and fixed between the lower roller bearing (32) and the lower ball bearing (31). The lower limiting sleeve (33) is used to limit the lower ball bearing (31).

5. The shaft for an axial flux motor according to claim 1, characterized in that: A boss (12) is integrally injection molded at the center of the surface of the shaft (1), and the top surface of the boss (12) is in contact with the bottom of the upper ball bearing (21), and the bottom surface of the boss (12) is in contact with the lower ball bearing (31). The boss (12) is used to limit the upper ball bearing (21) and the lower ball bearing (31).

6. The shaft for an axial flux motor according to claim 5, characterized in that: The boss (12) has keyways (13) on both sides of its surface. A deep groove (14) is formed on the surface of the boss (12) and below the keyway (13). The deep groove (14) communicates with the keyway (13). The keyway (13) and the deep groove (14) work together to limit and fasten the rotor frame during installation.

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