CN217455508U

CN217455508U - Turn-up magnetic ring and integrative wheel hub structure thereof

Info

Publication number: CN217455508U
Application number: CN202221060755.7U
Authority: CN
Inventors: 唐敏; 王加许; 王健; 林文君
Original assignee: TAIZHOU JINYU ELECTROMECHANICAL CO Ltd
Current assignee: TAIZHOU JINYU ELECTROMECHANICAL CO Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-09-20
Anticipated expiration: 2032-05-05

Abstract

The utility model relates to a turn-up magnetic ring and integrative wheel hub structure thereof, including the magnetic ring, the one end system of magnetic ring has outside convex first mounting panel, the tip of first mounting panel turns over a book and forms the second mounting panel, the system has a plurality of first screw holes on the first mounting panel, the system has a plurality of second screw holes on the second mounting panel, and is a plurality of the second screw hole is with a plurality of first screw hole one-to-one, first mounting panel with the second mounting panel forms turn-up on the magnetic ring. Compared with the prior art, the first screw hole and the second screw hole are positioned on the turned edge of the magnetic conduction ring, so that the radial thickness of the magnetic conduction ring is reduced, the weight is reduced, the cost is reduced, the space occupied by the stator is increased, and the power density of the motor is higher by increasing the outer diameter of the stator; the second mounting plate is arranged, so that the contact area between the magnetic conduction ring and the screw is increased, and the hub cover or the end cover is more firmly mounted.

Description

Turn-up magnetic conduction ring and integrative wheel hub structure thereof

Technical Field

The utility model relates to a turn-up magnetic ring and integrative wheel hub structure thereof belongs to electric motor car technical field.

Background

The electric vehicle comprises an electric bicycle, an electric motorcycle, an electric automobile, an electric scooter and the like, and the electric vehicle is used as a new energy vehicle, so that the electric vehicle meets the requirement of a civilian travel tool for the majority of citizens due to a plurality of characteristics of economy, environmental protection, fashion and the like. With the release of the new national standard GB17761-2018 safety technical Specification for electric bicycles, the terms in the whole text are mandatory standards. The key clause requires that the weight of the whole vehicle is not more than 55KG, and therefore the requirement on light weight design of the whole vehicle is extremely urgent.

However, the hub used by the hub motor of the current electric vehicle has the following disadvantages: the end face of the magnetic conduction ring on the hub is provided with a plurality of fastening screw holes, the fastening screw holes are used for mounting the motor end cover and the hub cover, in order to ensure that the fastening screw holes on the end face of the magnetic conduction ring have enough space and strength, the radial thickness of the magnetic conduction ring is designed according to the maximum size requirement, the weight of the magnetic conduction ring is heavier due to the large wall thickness, and the material consumption is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the shortcoming of prior art, provide a turn-up magnetic ring and integrative wheel hub structure of weight reduction, reduce cost.

For realizing the purpose the utility model adopts the technical proposal that:

the utility model provides a turn-up magnetic ring, includes the magnetic ring, the one end system of magnetic ring has outside convex first mounting panel, the system has a plurality of first screw holes on the first mounting panel, the tip of first mounting panel is turned over and form the second mounting panel, the system has a plurality of second screw holes on the second mounting panel, and is a plurality of the second screw hole is with a plurality of first screw hole one-to-one, first mounting panel with the second mounting panel forms turn-up on the magnetic ring.

As a further optimization of the above technical solution: keep away from on the first mounting panel the side of second mounting panel with keep away from on the second mounting panel distance between the side of first mounting panel is fixed thickness B, the relation between the radial thickness A of magnetic ring and the fixed thickness B is: b is more than or equal to 2A.

As a further optimization of the above technical solution: the radial thickness A of the magnetic conductive ring is 2.0mm-4.5 mm.

As a further optimization of the above technical solution: the diameter C of the inner ring of the magnetic conduction ring is 210mm-224 mm.

An integrated hub structure using the hemming magnetic conduction ring in the technical scheme comprises a hub, a hub cover and an end cover, wherein the magnetic conduction ring is tightly attached to the inner wall of the hub, the hub cover and the end cover are respectively positioned on two sides of the hub, a first mounting plate is positioned at one end, far away from the hub cover, of the magnetic conduction ring, a third screw hole is formed in the hub cover or the end cover, a screw is arranged in the third screw hole, and the end portion of the screw sequentially penetrates through the third screw hole, the first screw hole and the second screw hole so as to fix the hub cover or the end cover on the magnetic conduction ring.

As a further optimization of the above technical solution: the hub cover or the side surface of the end cover close to the hub is provided with a plurality of convex magnetic isolation teeth, and a magnetic isolation groove is formed between every two adjacent magnetic isolation teeth.

As a further optimization of the above technical solution: the magnetism isolating teeth and the hub cover or the end cover are integrally formed.

As a further optimization of the above technical solution: the magnetic conduction ring and the hub are fixed through welding, one of the hub cover and the end cover is fixed with the magnetic conduction ring and the hub through the screws, and the other of the hub cover and the end cover is fixed through welding.

As a further optimization of the above technical solution: the side face, far away from the hub, of the hub cover is welded with a flange plate and a hub cover ring, a motor shaft hole is formed in the hub cover, the flange plate is in contact with the hole wall of the motor shaft hole, a circle of mounting groove is further formed in the hub cover, and the hub cover ring is in contact with the groove bottom of the mounting groove.

As a further optimization of the above technical solution: the side surface, far away from the hub, of the hub cover is further provided with a plurality of reinforcing protrusions and a plurality of reinforcing grooves, the reinforcing protrusions are located between the motor shaft hole and the mounting grooves, and the reinforcing grooves are located on the outer side of the mounting grooves.

Compared with the prior art, the first screw hole and the second screw hole are positioned on the turned edge of the magnetic conduction ring, so that the radial thickness of the magnetic conduction ring is reduced, the weight is lightened, the cost is reduced, the space occupied by the stator is increased, and the power density of the motor is larger by increasing the outer diameter of the stator; the second mounting plate is arranged, so that the contact area of the magnetic conduction ring and the screw is increased, and the hub cover or the end cover is more firmly mounted; the magnetic isolation teeth are arranged on the hub cover or the end cover, so that the manufacturing process is simple, the process cost is low, the pole arc coefficient of the motor is not 1, and the cost is greatly reduced by reducing the using amount of magnetic steel on the premise of ensuring that the performance parameters of the motor are not changed; the hub cover is welded with the flange plate and the hub cover ring, the magnetic conduction ring and the hub are welded and fixed, one of the hub cover and the end cover is fixed with the magnetic conduction ring and the hub through screws, the other one of the hub cover and the end cover is welded and fixed with the hub, an integrated hub structure is formed, and the strength is higher.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional structure of the present invention.

Fig. 3 is a schematic perspective view of the hub cover of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description. As shown in fig. 1-3, a curled magnetic conductive ring and an integrated hub structure thereof includes a hub 1, a magnetic conductive ring 2, a hub cover 3 and an end cover. The magnetic conduction ring 2 is tightly attached to the inner wall of the hub 1, and the hub cover 3 and the end cover are respectively positioned on two sides of the hub 1.

In the above technical scheme: one end system of magnetic ring 2 has the outside convex first mounting panel 21 of round, and the tip of first mounting panel 21 turns over and forms the second mounting panel 22 parallel with first mounting panel 21. A plurality of first screw holes 23 are formed in the first mounting plate 21, a plurality of second screw holes 24 are formed in the second mounting plate 22, and the plurality of second screw holes 24 correspond to the plurality of first screw holes 23 one to one. The first mounting plate 21 and the second mounting plate 22 form a bead on the flux ring 2. And a third screw hole is formed in the hub cover 3 or the end cover, a screw is arranged in the third screw hole, and the end part of the screw sequentially passes through the third screw hole, the first screw hole 23 and the second screw hole 24, so that the hub cover 3 or the end cover is fixed on the magnetic conduction ring 2. Because the first screw hole 23 and the second screw hole 24 are positioned on the curled edge of the magnetic conductive ring 2, the radial thickness of the magnetic conductive ring 2 is reduced, the weight is lightened, and the cost is reduced. Compared with the magnetic conduction ring in the prior art, the magnetic conduction ring 2 of the utility model reduces the weight by 15 percent. The second mounting plate 22 increases the contact area between the magnetic conductive ring 2 and the screw, so that the hub cover 3 or the end cover can be mounted more firmly.

In the above technical scheme: the magnetic conductive ring 2 and the hub 1 are welded and fixed. One part of the hub cover 3 and the end cover is fixed with the magnetic conduction ring 2 and the hub 1 through screws, and the other part of the hub cover and the hub 1 are fixed in a welding mode to form an integral hub structure, so that the strength is higher. The utility model provides a welding mode is argon arc welding. In fig. 1 and 2, the hub cover 3 and the hub 1 are welded.

In the above technical scheme: the radial thickness A of the magnetic conductive ring 2 is 2.0mm-4.5 mm. The distance between the side of the first mounting plate 21 far away from the second mounting plate 22 and the side of the second mounting plate 22 far away from the first mounting plate 21 is a fixed thickness B, and the relationship between the radial thickness a and the fixed thickness B of the flux ring 2 is as follows: b is more than or equal to 2A, so that the magnetic conduction ring 2 and the hub cover 3 or the end cover are firmly installed. The diameter C of the inner ring of the magnetic conductive ring 2 is 210mm-224 mm. The stator is arranged in the magnetic conduction ring 2, under the condition that the size of the hub 1 is the same, the radial thickness of the magnetic conduction ring 2 is reduced, namely the diameter of the inner ring of the magnetic conduction ring 2 is increased, namely, the space occupied by the stator is increased, and the power density of the motor is larger by increasing the outer diameter of the stator.

In the above technical scheme: the hub cover 3 or the side surface of the end cover close to the hub 1 is provided with a plurality of convex magnetic isolation teeth 4, and a magnetic isolation groove 5 is formed between every two adjacent magnetic isolation teeth 4. The magnetism isolating teeth 4 and the hub cover 3 or the end cover are integrally formed. Magnetic steel is assembled in the magnetism isolating groove 5 and clings to the inner wall of the magnetic conduction ring 2. Fig. 3 is a schematic perspective view of the hub cover 3 with the magnetism isolating teeth 4.

The magnetic isolation teeth 4 are arranged, so that the using amount of magnetic steel is greatly reduced; and set up on the hub cap 3 or end cover with the magnetism isolating tooth 4, this structure compares with setting up the magnetism isolating tooth on the magnetic conduction ring, because the magnetic conduction ring is formed by laminating a plurality of silicon steel sheets, the magnetic conduction ring is made with the magnetism isolating tooth, requires that each silicon steel sheet is made with magnetism isolating tooth promptly, and material cost and technology cost are high, and the silicon steel sheet is thinner, and the preparation degree of difficulty of magnetism isolating tooth is high. Therefore, the utility model has the advantages of simple manufacturing process, low process cost and the like.

The magnetism isolating teeth 4 also make the pole arc coefficient of the motor not 1. The pole arc coefficient is the ratio of the width of the magnetic steel to the pole pitch, and the pole pitch is the distance between two adjacent magnetic poles along the surface of the armature. The utility model provides a polar arc coefficient is 0.6 ~ 0.95. The pole arc coefficient is small, the motor torque is small, the magnetic steel consumption is small, and the cost is low; the pole arc coefficient is large, the motor torque is large, the magnetic steel consumption is large, and the cost is high; the polar arc coefficient is selected from the range of 0.6-0.95, and the cost performance of the motor is relatively high. The magnetic isolation teeth 4 enable quadrature axis inductance and direct axis inductance of the motor to be unequal, and therefore the motor has a salient pole effect. The salient pole effect enables the torque output by the motor to be increased by reluctance torque, namely, under the condition of the same phase current, larger torque can be output, so that the whole vehicle is stronger in power and superior in starting and accelerating performance. And the salient pole effect can also enhance the weak magnetic acceleration effect, thereby obtaining larger rotating speed, obtaining wider speed regulation range, meeting the driving requirement of the electric vehicle, realizing the consideration of endurance mileage and power and improving the comprehensive performance of the motor. The motor performance parameter is guaranteed to be unchanged, and the cost is greatly reduced by reducing the using amount of the magnetic steel.

In the above technical scheme: the side of the hub cover 3 remote from the hub 1 is provided with a flange 6 and a hub cover ring 7. The hub cover 3 is provided with a motor shaft hole, and the flange 6 is contacted with the hole wall of the motor shaft hole. The hub cover 3 is also provided with a circle of mounting grooves 31, and the hub cover ring 7 is contacted with the groove bottom of the mounting grooves 31. When in installation, the flange plate 6 is firstly placed in the shaft hole of the motor, and the flange plate 6 and the hub cover 3 are firmly welded; then one side of the hub cover ring 7 is put into the mounting groove 31, and the hub cover ring 7 and the hub cover 3 are welded firmly. The side of the hub cover 3 remote from the hub 1 is also formed with reinforcing protrusions 32 and reinforcing grooves 33. The plurality of reinforcing protrusions 32 are uniformly distributed between the motor shaft hole and the mounting groove 31 in a radial manner, and the plurality of reinforcing grooves 33 are uniformly distributed on the outer side of the mounting groove 31 in a radial manner. The reinforcing protrusions 32 and the reinforcing grooves 33 can improve the strength of the hub cover 3.

In the above technical scheme: the hub 1 is provided with a valve hole 11, and the valve hole 11 is used for installing a valve.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, all should fall into the protection scope of the utility model, the technical scheme that the design of this technical field technical personnel according to the utility model can be obtained through logic analysis, reasoning or limited experiment on prior art's basis, all should fall into.

Claims

1. The utility model provides a turn-up magnetic ring, includes magnetic ring (2), its characterized in that the one end system of magnetic ring (2) has outside convex first mounting panel (21), the system has a plurality of first screw holes (23) on first mounting panel (21), the tip of first mounting panel (21) is turned over and form second mounting panel (22), the system has a plurality of second screw holes (24) on second mounting panel (22), and is a plurality of second screw hole (24) and a plurality of first screw hole (23) one-to-one, first mounting panel (21) with second mounting panel (22) form turn-up on the magnetic ring (2).

2. A curled magnetically conductive ring according to claim 1, wherein the distance between the side of the first mounting plate (21) remote from the second mounting plate (22) and the side of the second mounting plate (22) remote from the first mounting plate (21) is a fixed thickness B, and the relationship between the radial thickness a of the magnetically conductive ring (2) and the fixed thickness B is: b is more than or equal to 2A.

3. Crimping flux ring according to claim 1 or 2, characterized in that the radial thickness a of the flux ring (2) is 2.0mm-4.5 mm.

4. Crimping flux ring according to claim 1, characterized in that the diameter C of the inner ring of the flux ring (2) is 210mm-224 mm.

5. An integrated hub structure using the hemming flux ring according to any one of claims 1 to 4, comprising a hub (1), a hub cover (3) and an end cover, wherein the flux ring (2) is tightly attached to the inner wall of the hub (1), the hub cover (3) and the end cover are respectively located at two sides of the hub (1), a third screw hole is formed on the hub cover (3) or the end cover, a screw is arranged in the third screw hole, and the end of the screw passes through the third screw hole, the first screw hole (23) and the second screw hole (24) in sequence, so that the hub cover (3) or the end cover is fixed on the flux ring (2).

6. The integrated hub structure according to claim 5, wherein the hub cover (3) or the end cover is provided with a plurality of protruding magnetism isolating teeth (4) on the side surface close to the hub (1), and magnetism isolating grooves (5) are formed between two adjacent magnetism isolating teeth (4).

7. A unitary hub structure according to claim 6, characterized in that said flux-isolating teeth (4) are integrally formed with said hub cap (3) or said end cap.

8. The integrated hub structure according to claim 5, wherein the magnetic conductive ring (2) and the hub (1) are welded and fixed, one of the hub cover (3) and the end cover is fixed to the magnetic conductive ring (2) and the hub (1) by the screws, and the other of the hub cover and the end cover is welded and fixed to the hub (1).

9. The integrated hub structure according to claim 5, wherein a flange plate (6) and a hub cover ring (7) are welded on the side of the hub cover (3) far away from the hub (1), a motor shaft hole is formed in the hub cover (3), the flange plate (6) is in contact with the wall of the motor shaft hole, a circle of mounting groove (31) is further formed in the hub cover (3), and the hub cover ring (7) is in contact with the groove bottom of the mounting groove (31).

10. The unitary hub structure according to claim 9, wherein the hub cover (3) is further formed with a plurality of reinforcing protrusions (32) and a plurality of reinforcing recesses (33) on a side thereof remote from the hub (1), the reinforcing protrusions (32) being located between the motor shaft hole and the mounting recesses (31), the reinforcing recesses (33) being located outside the mounting recesses (31).