Integrated steel hub motor

Abstract

The utility model provides an integrated steel hub motor, and belongs to the technical field of motors, the integrated steel hub motor comprises an integrated hub cover, a motor stator, a second end cover and a dustproof net, the second end cover and the integrated hub cover are oppositely buckled to form a motor cavity of a hollow structure, and the motor stator is arranged in the motor cavity; the integrated hub cover comprises a rim and a first end cover, a rotor is fixedly connected in the rim, the first end cover which is integrally manufactured is connected to one axial end of the rim, a plurality of blades are uniformly arranged on the first end cover, and the first end cover among the blades is of a hollow structure; a plurality of blades are arranged on the second end cover, and the second end cover among the blades is of a hollow structure; the inner side of the first end cover and the inner side of the second end cover are each provided with a dustproof net, and the dustproof nets completely cover the hollow structures. The motor adopts an end cover design similar to a fan blade, and adopts an efficient heat dissipation mode of enhancing the air velocity, so that the heat dissipation problem of a steel motor is solved.

Description

Technical Field

[0001] The present application belongs to the field of motor technology and relates to a hub motor for a two-wheeled bicycle, specifically an integrated steel hub motor. Background Art

[0002] The wheel hub is an important driving component on the vehicle, bearing most of the load generated during the vehicle's driving. The steel wheel hub has a good load-bearing capacity. The steel wheel hub motors currently on the market generally have two obvious disadvantages: first, the wheel hub motor sealed by steel material is not conducive to heat dissipation; second, the manufacturing process is complicated, resulting in high manufacturing costs. Summary of the invention

[0003] The purpose of the present application is to overcome the deficiencies of the prior art and provide an integrated steel hub motor.

[0004] An integrated steel hub motor comprises an integrated hub cover, a motor stator, a second end cover and a dustproof net.

[0005] The integrated hub cover and the second end cover are buckled relative to each other to form a motor cavity with a hollow structure. A motor stator is arranged in the motor cavity. A motor shaft is coaxially passed through the motor stator. Both ends of the motor shaft extend to the outside of the motor cavity.

[0006] The integrated hub cover comprises a rim and a first end cover, wherein a rotor is fixedly connected inside the rim, an axial end of the rim is connected to an integrally manufactured first end cover, a plurality of blades are evenly arranged on the first end cover, and the first end cover between the blades is a hollow structure;

[0007] The second end cover is provided with a plurality of blades, and the second end cover between the blades is a hollow structure;

[0008] Dust-proof nets are arranged inside the first end cover and the second end cover, and the dust-proof nets completely cover the hollow structure.

[0009] By adopting the above technical solution, this solution adopts an integrated hub cover with an integrated structure, and the rim and the end cover on one side are made in one piece, which saves the subsequent installation process of the end cover on one side. The end covers on both sides are provided with blade structures. When the rotor drives the end cover to rotate, a technical effect similar to that of a fan is produced. The blades accelerate the air flow inside the motor cavity, and the heat dissipation effect is good. The gap between the motor stator and the rotor is small, and the dustproof net can effectively prevent dust and other impurities from entering the motor cavity, ensuring the normal operation of the motor.

[0010] Preferably, a protective net is provided between the dustproof net and the end cover, and the protective net completely covers the hollow structure.

[0011] By adopting the above technical solution, a protective net is arranged outside the dustproof net. The protective net is made of a metal net or hard plastic material that is not easily damaged, so as to prevent external force from piercing the dustproof net and causing the motor to lose protection.

[0012] Preferably, a plurality of guide holes are arranged at intervals on the outer circumference of the first end cover and the second end cover.

[0013] By adopting the above technical solution, the guide hole connects the inside and outside of the motor cavity, and can discharge the water in the motor cavity to prevent internal water accumulation from affecting the operation of the motor.

[0014] Preferably, the protective net includes a mesh surface, which is a circular ring structure and has ventilation holes evenly distributed on the mesh surface.

[0015] By adopting the above technical solution, large-diameter vent holes are arranged on the protective net, thereby ensuring the ventilation performance of the end cover.

[0016] Preferably, the protective net includes a limiting ring, which is fixedly connected to the inner and outer circumferential positions of the net surface, respectively. The cross-section of the limiting ring is a U-shaped structure, and the inner and outer limiting rings are relatively arranged with openings, and the inner and outer circumferential edges of the dustproof net are respectively embedded in the openings of the corresponding limiting ring U-shaped structures.

[0017] By adopting the above technical solution, the protective net adopts a U-shaped structure on the inner and outer sides, and the dustproof net is limited and fixed from the inner and outer sides respectively.

[0018] Preferably, the inner sides of the first end cover and the second end cover corresponding to the installation position of the protection net are respectively provided with limiting grooves, and the limiting grooves match the protection net.

[0019] By adopting the above technical solution, the setting of the limiting groove makes it easier for the protective net to be accurately positioned and installed.

[0020] Preferably, the limiting ring is provided with a plurality of screw through holes evenly spaced apart, and the screw through holes all coaxially penetrate the U-shaped structure; a plurality of screw holes are arranged at intervals on both sides of the limiting groove, and bolts fix the protective net and the dustproof net at corresponding positions of the limiting ring.

[0021] By adopting the above technical solution, the bolt passes through the limiting ring and the dustproof net embedded in the limiting ring, and then is fixed on the end cover, thereby simultaneously fixing the dustproof net and the protective net on the corresponding end cover.

[0022] Preferably, the motor stator is waterproofed by using insulating varnish.

[0023] By adopting the above technical solution, the motor stator is treated with insulation technology to ensure that it can work normally even when there is water inside the motor.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] This motor adopts an end cover design similar to that of a fan blade, and adopts an efficient heat dissipation method that enhances air flow rate. In order to prevent dust, a special dust-proof design is adopted, which solves the heat dissipation problem of steel motors. At the same time, the rotor is designed for drainage and the motor stator is insulated, so the motor is not afraid of water ingress. In addition, from the perspective of manufacturing technology, the design of the integrated steel rotor is optimized, the structure is simple, and the manufacturing is easy, thereby greatly reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an exploded view of the motor parts.

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the integrated hub cover.

[0028] Figure 3 It is a schematic cross-sectional view of the integrated hub cover from the front.

[0029] Figure 4 yes Figure 3 A partial enlarged view of part A.

[0030] Figure 5 Schematic diagram of the outer three-dimensional result of the second end cover.

[0031] Figure 6 It is a schematic diagram of the inner three-dimensional structure of the second end cover.

[0032] Figure 7 It is a schematic diagram of the center section structure of the integrated hub cover.

[0033] Figure 8 It is a structural diagram of the first protective net.

[0034] Fig. 9 yes Figure 8 BB section view.

[0035] Fig.10 yes Fig. 9 A partial enlarged view of part C.

[0036] Figure numerals: 1. integrated hub cover; 101. first end cover; 102. rim; 2. first protective net; 201. limiting ring; 202. mesh surface; 3. first dustproof net; 4. motor stator; 5. second dustproof net; 6. second protective net; 7. second end cover; 8. motor shaft; 9. blades; 10. guide hole; 11. limiting groove; 12. screw hole; 13. annular edge. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings.

[0038] See attached Figure 1As shown,

[0039] An integrated steel hub motor comprises an integrated hub cover 1, a first protective net 2, a first dustproof net 3, a motor stator 4, a second dustproof net 5, a second protective net 6 and a second end cover 7.

[0040] The integrated hub cover 1 includes a rim 102 and a first end cover 101. The inner edge of the rim 102 is evenly attached with magnetic steel in a ring shape, and one axial end of the rim 102 is connected with the first end cover 101 made in one piece. Compared with ordinary hubs, the process of welding steel rings (magnetic steel attachment parts) is omitted, and the end cover does not need to be re-positioned and installed after integrated processing, which improves the product assembly efficiency.

[0041] The integrated hub cover 1 and the second end cover 7 are buckled relative to each other to form a motor cavity capable of accommodating the internal structure of the motor.

[0042] The motor stator 4 is coaxially fixed to the middle of the motor shaft 8, and the motor stator 4 is arranged in the motor cavity. The two ends of the motor shaft 8 respectively pass through the centers of the first end cover 101 and the second end cover 7 and extend to the outside of the motor cavity; the integrated hub cover 1 and the second end cover 7 are coaxially arranged with the motor shaft 8, and are respectively rotatably connected to the motor shaft 8, and the connection positions between the motor shaft 8 and the integrated hub cover 1 and the second end cover 7 are provided with bearing assemblies and shaft sealing structures. The bearing assembly and the shaft sealing structure adopt the existing technology and are not described in detail in this embodiment. The shaft sealing structure seals the sealing inside the cavity; the bearing assembly ensures the flexible rotation connection between the motor shaft 8 and the second end cover 7 and the motor shaft 8 and the integrated hub cover, and the integrated hub cover 1 and the second end cover 7 can rotate relative to each other at high speed around the motor shaft 8.

[0043] See attached Figure 2 As shown, the integrated hub cover 1 includes a first end cover 101 and a rim 102. The rim 102 is a cylindrical structure. The outer periphery of the rim 102 is provided with an annular groove matching the rubber tire. The inner periphery of the rim 102 is a smooth cylindrical inner wall. The inner periphery of the rim 102 is evenly attached with magnetic steel (not shown in the figure) to form an electronic rotor structure. The first end cover 101 is connected to one axial end of the rim 102. The first end cover 101 and the rim 102 are made in one piece.

[0044] See attached Figure 3 As shown, the first end cover 101 is a disc structure, an axial hole is provided at the center of the first end cover 101, a plurality of blades 9 are evenly spaced on the outer periphery of the first end cover 101, and the first end cover 101 between the blades 9 is a hollow structure. In this embodiment, the first end cover 101 is designed with three blades 9. When the motor is working, the blades 9 rotate with the integrated hub cover 1. The blades 9 are provided with a curved surface structure, which will be subject to the lift generated by the rotation, thereby promoting the air flow, increasing the air flow rate through the motor cavity, and improving the heat dissipation effect.

[0045] See attached Figure 3 , 4 As shown, due to the ventilation design of the blades 9, this motor structure is not waterproof. In order to prevent excessive water accumulation in the motor, a plurality of guide holes 10 are evenly spaced around the outer periphery of the first end cover 101. The guide holes 10 penetrate the inside and outside of the first end cover 101 along the tangential direction. The tangential direction is the same as the inertial movement direction of water. The centrifugal force generated by the rotation of the motor brings the water to the outside of the motor.

[0046] In order to ensure the normal operation of the motor, the motor stator 4 is surface treated with insulating paint, and the motor stator 4 wrapped with insulating paint is waterproof and can still work normally when there is water in the motor cavity. Through technical processing, it can be ensured that the motor can still work normally when there is water in the motor cavity.

[0047] See attached Figure 5 As shown, the second end cover 7 is a disc-shaped structure, a main shaft hole through which the power supply shaft 8 passes is arranged at the center of the second end cover 7, an annular edge 13 is arranged on the outer periphery of the second end cover 7, and a flange structure that can be connected to the integral hub cover 1 is arranged on the outer periphery of the annular edge 13; three blades 9 are evenly arranged on the second end cover 7 between the annular edge 13 and the main shaft hole, and the second end cover 7 between the blades 9 is a hollow structure. When the motor is working, the blades 9 will be subject to the lift generated by the rotation, thereby promoting the flow of air, increasing the air flow rate through the motor cavity, and improving the heat dissipation effect.

[0048] See attached Figure 1 As shown, in order to prevent dust and debris from entering the motor cavity, dustproof nets are provided on the inner sides of the second end cover 7 and the first end cover 101, a second dustproof net 5 is provided in the second end cover 7, and a first dustproof net 3 is provided in the first end cover 101; because the air gap between the motor magnet and the motor stator 4 is very small, the dustproof net is used to prevent dust from entering the motor cavity to ensure the normal operation of the motor.

[0049] In order to prevent the dustproof net from being punctured, a protective net is covered on the outside of the dustproof net. The sizes of the protective net and the dustproof net are matched. Specifically, a second protective net 6 is provided between the second dustproof net 5 and the second end cover 7, and a first protective net 2 is provided between the first dustproof net 3 and the first end cover 101. The protective net is used to protect the dustproof net and prevent the dustproof net from being damaged due to large external force.

[0050] See attached Figure 6 , 7 As shown, in order to improve the accuracy of the installation position, an annular limiting groove 11 is set at the inner outer circumference of the first end cover 101 and the second end cover 7. The limiting groove 11 is used to cooperate with the structure of the protective net to facilitate the positioning of the protective net and facilitate installation.

[0051] See attached Figure 8As shown, the first protective net 2 includes a net surface 202 and a limiting ring 201, and the net surface 202 is evenly and densely covered with ventilation holes; the net surface 202 is a circular ring structure, and limiting rings 201 are arranged at the inner and outer circumferential positions of the net surface 202, and the limiting rings 201 are used to install the dustproof net.

[0052] See attached Fig. 9 , 10 As shown, the cross-section of the limiting ring 201 is a U-shaped structure, the inner and outer limiting rings 201 are opened and arranged opposite to each other, dustproof nets are arranged inside the inner and outer limiting rings 201, and multiple screw holes 12 are arranged at intervals along the limiting ring 201. The bolts pass through the limiting ring 201 and fix the dustproof net in the limiting groove 11 at the same time.

[0053] The first protection net 2 has the same structure as the second protection net 6, and the first dustproof net 3 has the same structure as the second dustproof net 5. This embodiment will not be described again.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An integrated steel hub motor, characterized in that: It comprises an integrated hub cover (1), a motor stator (4), a second end cover (7) and a dust screen. The integrated hub cover (1) and the second end cover (7) are buckled relative to each other to form a motor cavity with a hollow structure, wherein a motor stator (4) is arranged in the motor cavity, a motor shaft (8) is coaxially passed through the motor stator (4), and both ends of the motor shaft (8) extend to the outside of the motor cavity; The integrated hub cover (1) comprises a rim (102) and a first end cover (101), a rotor is fixedly connected inside the rim (102), an axial end of the rim (102) is connected to an integrally manufactured first end cover (101), a plurality of blades (9) are evenly arranged on the first end cover (101), and the first end cover (101) between the blades (9) is a hollow structure; The second end cover (7) is provided with a plurality of blades (9), and the second end cover (7) between the blades (9) is a hollow structure; Dust-proof nets are arranged on the inner sides of the first end cover (101) and the second end cover (7), and the dust-proof nets completely cover the hollow structure.

2. The integrated steel hub motor according to claim 1, characterized in that: A protective net is arranged between the dustproof net and the end cover, and the protective net completely covers the hollow structure.

3. The integrated steel hub motor according to claim 1, characterized in that: A plurality of flow guide holes (10) are arranged at intervals on the outer circumference of the first end cover (101) and the second end cover (7).

4. The integrated steel hub motor according to claim 2, characterized in that: The protective net comprises a net surface (202), the net surface (202) is a circular ring structure, and the net surface (202) is evenly and densely covered with ventilation holes.

5. The integrated steel hub motor according to claim 2, characterized in that: The protective net comprises a limiting ring (201), the limiting ring (201) being fixedly connected to the inner and outer circumferential positions of the net surface (202), the cross section of the limiting ring (201) being a U-shaped structure, the inner and outer circumferential limiting rings (201) being arranged with openings facing each other, and the inner and outer circumferential edges of the dustproof net being respectively embedded in the openings of the corresponding U-shaped structures of the limiting rings (201).

6. The integrated steel hub motor according to claim 5, characterized in that: Limiting grooves (11) are respectively arranged on the inner sides of the first end cover (101) and the second end cover (7) corresponding to the installation position of the protection net, and the limiting grooves (11) match the protection net.

7. The integrated steel hub motor according to claim 6, characterized in that: The limiting ring (201) has multiple screw holes evenly spaced apart, and the screw holes all coaxially penetrate the U-shaped structure; multiple screw holes (12) are spaced apart on both sides of the limiting groove (11), and bolts are used to fix the protective net and the dustproof net at corresponding positions of the limiting ring (201).

8. The integrated steel hub motor according to claim 1, characterized in that: The motor stator (4) is waterproofed by using insulating varnish.

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