Outer rotor of electric vehicle hub motor with spacer

Abstract

The invention discloses an outer rotor of an electric vehicle hub motor provided with a spacer, belonging to the technical field of motor equipment parts, comprising an annular body (1), an annular body (2) and an outer flange (3), positioning holes (4) and mounting holes (5) are arranged on both side end faces of the annular body (1), an inner flange (6) is arranged at one end of the inner side of the annular body (1), an iron ring (7) is arranged on the inner side of the annular body (1), a spacer (8) made of non-magnetic conductive material is arranged on the inner side of the iron ring (7), the spacer (8) is made of metal material, and the spacer (8) is fixedly connected to the iron ring (7); the spacer (8) provided in the invention can be fixedly connected to the iron ring (7), and the fixing effect is good; the amount of magnetic steel used can be reduced without changing the magnetic strength, so as to save production costs, and the magnetic steel can be conveniently placed, so as to improve production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of motor equipment parts, and in particular relates to an electric vehicle hub motor outer rotor provided with a spacer sleeve and applied to an electric vehicle hub motor. Background Art

[0002] The electric vehicle hub motor includes a rotor and a stator. The rotor is arranged on the outer periphery of the stator. The rotor is arranged on the outer periphery of the stator. A magnet is arranged in the rotor. The magnet is usually directly fixed to the inner wall of the rim. A high-strength adhesive is usually used to directly stick the magnet to the inner wall of the rim. The traditional method of sticking magnets includes using automatic magnet sticking equipment to stick the magnet to the inner wall of the rim. Due to the mutual attraction and repulsion between the magnets, it is necessary to wait until the adhesive is cured after the first piece of magnet is stuck, so the production efficiency is not high.

[0003] In order to improve production efficiency, the applicant disclosed in the invention patent with application number 2020103035027, whose application date is April 17, 2020, a rotor of an electric vehicle hub motor provided with a bracket, comprising a cylindrical body one, a cylindrical body two and a flange, a cylindrical body three is provided on the circumferential direction of the inner wall of the cylindrical body one, an annular bracket is provided on the circumferential direction of the inner wall of the cylindrical body three, a groove body for placing magnetic steel is provided on the bracket, an annular body is provided in the outer circumferential direction of the bracket, an annular groove matching the annular body is provided on the inner wall of the cylindrical body three, and the annular body is provided in the annular groove.

[0004] On the same day, the applicant also applied for application number 202010303560X, named "Electric vehicle hub motor rotor with a bracket", including a cylindrical body one, a cylindrical body two is respectively arranged near the two ends in the circumferential direction of the outer side of the cylindrical body one, and flanges are respectively arranged on the two side ends of the circumferential outer side of the cylindrical body two, the cylindrical body one, the cylindrical body two and the flange are arranged as an integral structure, a cylindrical body three is arranged in the circumferential direction of the inner wall of the cylindrical body one, the height of the cylindrical body one is greater than the height of the cylindrical body three, an annular bracket is arranged in the circumferential direction of the inner wall of the cylindrical body three, a groove for placing a magnetic steel is arranged on the bracket, and a fixing part for fixing the bracket is arranged in the outer circumferential direction of the bracket, and the fixing part fixes the bracket on the cylindrical body three.

[0005] The above-mentioned product is provided with a bracket for placing magnetic steel, so that the magnetic steel is arranged in an orderly manner, which is beneficial to the automated production of electric vehicle hub motor rotors and improves production efficiency, with good results; however, the fixing effect between the above-mentioned bracket and the cylindrical body three needs to be further improved. Summary of the invention

[0006] The problem to be solved by the present invention is the technical problem that the fixing effect between the magnet and the wheel hub and the fixing effect between the magnet and the bracket in the prior art are not good enough. An outer rotor of an electric vehicle hub motor with a spacer sleeve is provided, which is beneficial to the fixation between the magnet and the rim and the fixation between the magnet and the bracket. The installation of the magnet is convenient, and it is beneficial to the fixed connection between the magnet and the rim, which can further improve the quality of the motor.

[0007] In order to solve the above technical problems, the present invention provides an outer rotor of an electric vehicle hub motor with a spacer, comprising an annular body one, an annular body two is respectively arranged near the two ends in the circumferential direction of the outer side of the annular body one, and outer flanges are respectively arranged on the two side ends of the circumferential outer side of the annular body two. The annular body one, the annular body two and the outer flange are arranged as an integral structure to form a rim. Positioning holes and mounting holes are arranged on the two side end surfaces of the annular body one, an iron ring made of magnetic conductive material is arranged on the inner side of the annular body one for placing magnetic steel, and a spacer made of non-magnetic conductive material for isolating the magnetic steel is arranged on the inner side of the iron ring. The spacer is made of metal material, and the spacer is fixedly connected to the iron ring by bending the two ends of the spacer.

[0008] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer sleeve comprises a strip-shaped connecting portion, isolation teeth are arranged on one side of the strip-shaped connecting portion, the isolation teeth are used to separate the magnetic steel, and fixed teeth are arranged on the other side of the connecting portion, and the fixed teeth are fixedly connected to the iron ring after being bent.

[0009] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer sleeve, one side edge of the strip-shaped connecting part is flush with one side edge of the iron ring, and the fixed teeth are arranged on the side of the connecting part that is flush with one side edge of the iron ring, so that the bending of the fixed teeth is convenient and the processing is convenient, and the bending of the fixed teeth plays the role of fixing the spacer sleeve.

[0010] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer sleeve is provided with the isolation teeth in a strip shape, and the isolation teeth in the strip shape are arranged at equal intervals, that is, the spacing between the isolation teeth is equal, so that it is convenient to place the magnetic steel. The strip shape can be set to a long strip shape, that is, the cross section of the strip body is a square or a rectangle.

[0011] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer sleeve, the end of the isolation tooth is bent toward the iron ring, one end of the isolation tooth is fixed to one side edge of the iron ring after being bent, the fixed tooth is bent toward the iron ring, and the fixed tooth is fixed to the other side edge of the iron ring after being bent. The present invention fixes the spacer sleeve to the inner side of the magnetic steel by bending the isolation teeth and the fixed teeth, and the length of the bent part of the isolation teeth and the fixed teeth is the same as or slightly smaller than the thickness of the part of the iron ring located on the inner side of the annular body and exposed to the outside.

[0012] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with the spacer sleeve has an opening after the isolation teeth are bent, and the width of the opening edge is slightly larger than the width of the inner side. In this way, when the magnet is placed automatically, since the width of the opening edge between the isolation teeth is slightly larger, an eight-shaped opening is formed, which is conducive to guiding and allows the magnet to be quickly placed between the isolation teeth.

[0013] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer sleeve has an inner flange arranged at one end of the annular body, and a gap is arranged between the inner flange and the iron ring, and the gap width is slightly larger than the length of the fixed tooth. Because when the iron ring and the rim are integrally injection molded, it is necessary to place an annular spacer sleeve on the iron ring, and then press the spacer sleeve against the surface of the iron ring, and then use a stamping device to bend the two ends of the isolation teeth and the fixed teeth, so that the isolation teeth are fixed to one side edge of the iron ring, and the fixed teeth are fixed to the other side edge of the iron ring, so that the spacer sleeve can be fixedly connected to the iron ring. Therefore, it is necessary to set a gap between the inner flange and the iron ring, and make the gap width slightly larger than the length of the fixed tooth.

[0014] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer is provided with an inner flange at one end of the annular body, and a gap is provided between the inner flange and the iron ring, and the gap width is slightly greater than the thickness of the fixed teeth. During manufacturing, because the annular spacer is set to a metal non-magnetic material, and the iron ring and the spacer are first fixedly connected before injection molding, and then the integrated iron ring and the spacer are placed in an injection molding machine for injection molding, in this case, the gap between the inner flange and the iron ring is set to be smaller, and the gap width only needs to be slightly greater than the thickness of the fixed teeth.

[0015] As a further improvement measure of the present invention, the outer rotor of the electric vehicle hub motor provided with a spacer sleeve is provided with an annular groove body on the inner side of the annular body, the width of the annular groove body is equal to the width of the iron ring, and the depth of the annular groove body is one third to two thirds of the thickness of the iron ring. In this way, during injection molding, the iron ring can be directly fixed in the annular groove, and the fixing effect is good, and the iron ring will not fall off.

[0016] As a further improvement measure of the present invention, in the above-mentioned electric vehicle hub motor outer rotor with a spacer, the width of the isolation teeth is one sixth to one twelfth of the width of the magnetic steel. If the width of the isolation teeth is too large, the width of the magnetic steel will become smaller, which will affect the magnetic force of the magnetic steel and ultimately affect the performance of the motor. If the width of the isolation teeth is too small, it will be unfavorable for processing and production, and will also cause waste of magnetic steel.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention provides a spacer made of non-magnetic material to isolate the magnetic steel, which can reduce the amount of magnetic steel used without changing the magnetic strength to save production costs; 2. By providing the spacer, the magnetic steel can be placed conveniently to improve production efficiency; 3. By providing the spacer made of metal material, it can be fixedly connected with the iron ring with a good fixing effect; and by providing the inner flange, the installation of the valve core can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of the present invention.

[0019] Figure 2 It is a top view of the present invention.

[0020] Figure 3 yes Figure 2 AA section view.

[0021] Figure 4 2. It is a schematic view of the spacer sleeve of the present invention.

[0022] Figure 5 It is the right view of the spacer sleeve of the present invention.

[0023] Figure 6 yes Figure 5 Enlarged view of the middle H part.

[0024] Figure 7 It is a three-dimensional diagram of a spacer sleeve of the present invention.

[0025] Figure 8 yes Figure 7 Enlarged view of part I in the middle.

[0026] Description of the accompanying drawings: 1-annular body 1, 2-annular body 2, 3-external flange, 4-positioning hole, 5-mounting hole, 6-inner flange, 7-iron ring, 8-spacer, 9-connecting part, 10-isolating tooth, 11-fixing tooth. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0030] like Figures 1 to 8 The outer rotor of the electric vehicle hub motor with a spacer shown includes an annular body 1, an annular body 2 2 is respectively arranged near both ends in the circumferential direction of the outer side of the annular body 1, and outer flanges 3 are respectively arranged on the two side ends of the annular body 2 2 in the circumferential direction. The annular body 1, the annular body 2 and the outer flange 3 are arranged as an integral structure to form a rim for placing tires. The integral arrangement facilitates processing and improves processing efficiency. Positioning holes 4 and mounting holes 5 are arranged on the end faces of both sides of the annular body 1. The positioning holes 4 are arranged diagonally in a cross shape. By setting the positioning holes 4, the position of the rim is determined during processing. In the present invention, determining the position of the rim has a major role in the subsequent installation of the spacer and the magnetic steel, because in the automated production process, the magnetic steel can be installed only after the position of the spacer is determined, and the magnetic steel can be installed one by one in the corresponding position of the spacer, which is convenient for installing the magnetic steel. At the same time, when installing the protective cover, it is convenient to fix the screws; by setting the mounting hole 5 and setting the nut in the mounting hole 5, the protective cover can be fixed on the rim with screws, and automatic production can be carried out, which can improve production efficiency. An iron ring 7 made of magnetic conductive material is arranged on the inner side of the annular body 1, and the inner surface of the iron ring 7 is used to place magnetic steel. The width of the iron ring 7 is greater than the width of the magnetic steel. A spacer 8 made of non-magnetic conductive material is arranged on the inner side of the iron ring 7 to isolate the magnetic steel. The amount of magnetic steel can be reduced without changing the magnetic strength to save production costs; the spacer 8 is made of metal material, and the spacer 8 is fixedly connected to the iron ring 7 by bending the two ends of the spacer 8. In this way, the processing is convenient, the fixing effect is good, and the service life of the spacer 8 is long. By setting the spacer 8, the magnetic steel can be conveniently placed to improve production efficiency.

[0031] like Figures 4 to 8As shown, the spacer 8 of the present invention is made of metal material, so that the processing can be carried out by stamping, which is convenient and efficient. At the same time, it is made of metal material and can be bent mechanically to facilitate the fixing of the spacer 8 on the iron ring 7. This is the main reason for the better fixing effect of the present invention. The spacer 8 includes a strip-shaped connecting portion 9. The connecting portion 9 serves as the main body of the spacer 8 and supports the isolation teeth 10 and the fixed teeth 11. The isolation teeth 10 are arranged on one side of the strip-shaped connecting portion 9. The isolation teeth 10 are used to separate the magnetic steel, and the fixed teeth 11 are arranged on the other side of the connecting portion 9. The present invention mainly achieves the purpose of fixing the isolation teeth 10 and the fixed teeth 11 to the two ends of the iron ring 7 by bending the ends of the isolation teeth 10 and the ends of the fixed teeth 11, so as to achieve the purpose of fixing the connection with the iron ring 7. It has a good fixing effect, improves the processing efficiency of the product, and improves the quality and service life of the product. When the strip-shaped connecting part 9 is installed, one side edge of the strip-shaped connecting part 9 is flush with one side edge of the iron ring 7, and the fixed teeth 11 are arranged on the side of the connecting part 9 that is flush with one side edge of the iron ring 7, so that the fixed teeth 11 are convenient to bend and process. At the same time, when one side edge of the strip-shaped connecting part 9 is flush with one side edge of the iron ring 7, and the fixed teeth 11 are arranged on the side of the connecting part 9 that is flush with one side edge of the iron ring 7, sufficient space can be left for the isolation teeth 10 on the other side, so as to facilitate the placement of the magnetic steel.

[0032] like Figures 4 to 8 As shown, the isolation teeth 10 are arranged in a strip shape, and can be arranged in a long strip shape, that is, the cross section of the long strip is arranged in a square or a rectangle, and the strip-shaped isolation teeth 10 are arranged at equal intervals, that is, the spacing between the isolation teeth 10 is equal, which makes it convenient to place the magnets and arrange the magnets neatly.

[0033] The end of the isolation tooth 10 is bent toward the iron ring 7, and one end of the isolation tooth 10 is fixed to one side edge of the iron ring 7 after being bent. The fixed tooth 11 is also bent toward the iron ring 7, and the fixed tooth 11 is fixed to the other side edge of the iron ring 7 after being bent. The spacer 8 is fixed to the inner side of the magnetic steel by bending the isolation teeth 10 and the fixed teeth 11, so that the fixing effect is better. The length of the bent part of the isolation teeth 10 and the fixed teeth 11 is the same as or slightly less than the thickness of the part of the iron ring 7 located on the inner side of the annular body 1 and exposed to the outside.

[0034] At the opening after the isolation teeth 10 are bent, the width of the opening edge is slightly larger than the inner width. In this way, when the magnet is placed automatically, since the width of the opening edge between the isolation teeth 10 is slightly larger, an eight-shaped opening is formed, which is conducive to guiding and allows the magnet to be quickly placed between the isolation teeth 10, thereby improving processing efficiency and avoiding the placement of the magnet due to the contact between the magnet and the edge of the isolation teeth 10.

[0035] The width of the isolation tooth 10 is one sixth to one twelfth of the width of the magnetic steel, and is selected according to the hub diameter and the width of the magnetic steel. If the width of the isolation tooth 10 is too large, the width of the magnetic steel will become smaller, which will affect the magnetic force of the magnetic steel and ultimately affect the performance of the motor. If the width of the isolation tooth 10 is too small, it will be unfavorable for processing and production, and will also cause waste of magnetic steel.

[0036] like Figure 1 and Figure 3 As shown, the inner flange 6 is provided at one end of the annular body 1. By providing the inner flange 6, the thickness between the inner edge of the inner flange 6 and the annular body 1 is increased, so that the installation of the valve core can be facilitated. A gap is provided between the inner flange 6 and the iron ring 7, and the gap width is slightly larger than the length of the fixed tooth 11, because when the iron ring 7 and the rim are integrally injection molded, it is necessary to place an annular spacer 8 on the iron ring 7, and then press the spacer 8 on the surface of the iron ring 7, and then use a stamping device to press and bend the two ends of the isolation tooth 10 and the fixed tooth 11, so that the isolation tooth 10 is fixed to one side edge of the iron ring 7, and the fixed tooth 11 is fixed to the other side edge of the iron ring 7, so that the spacer 8 can be fixedly connected to the iron ring 7. Therefore, it is necessary to provide a gap between the inner flange 6 and the iron ring 7, and the gap width is slightly larger than the length of the fixed tooth 11, so that the fixed tooth 11 can be pressed and bent.

[0037] As another embodiment, an inner flange 6 is provided at one end of the annular body 1, and a gap is provided between the inner flange 6 and the iron ring 7, and the gap width is slightly larger than the thickness of the fixed tooth 11. In this way, during manufacturing, because the annular spacer 8 is provided as a metal non-magnetic material, and the iron ring 7 and the spacer 8 are first fixedly connected before injection molding, and then the integrated iron ring 7 and the spacer 8 are placed in an injection molding machine for injection molding, in this case, the gap provided between the inner flange 6 and the iron ring 7 is provided to be smaller, and the gap width only needs to be slightly larger than the thickness of the fixed tooth 11.

[0038] In the present invention, an annular groove is arranged on the inner side of the annular body 1, the width of the annular groove is equal to the width of the iron ring 7, and the depth of the annular groove is one third to two thirds of the thickness of the iron ring 7, so that during injection molding, the iron ring 7 can be directly fixed in the annular groove, and the fixing effect is good, and the iron ring 7 will not fall off, so that the defects between the iron ring 7 and the annular body 1 through the gluing method can be avoided.

[0039] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. An outer rotor of an electric vehicle hub motor provided with a spacer, comprising an annular body (1), an annular body (2) is respectively arranged near both ends of the outer circumferential direction of the annular body (1), and outer flanges (3) are respectively arranged at both ends of the outer circumferential direction of the annular body (2), the annular body (1), the annular body (2) and the outer flange (3) are arranged as an integral structure to form a rim, and positioning holes (4) and mounting holes (5) are arranged on both side end surfaces of the annular body (1), characterized in that: An inner flange (6) is provided at one end of the inner side of the annular body (1); an iron ring (7) made of a magnetic conductive material is provided on the inner side of the annular body (1); a spacer (8) made of a non-magnetic conductive material for isolating the magnetic steel is provided on the inner side of the iron ring (7); the spacer (8) is made of a metal material; the spacer (8) is fixedly connected to the iron ring (7); the spacer (8) includes a strip-shaped connecting portion (9); an isolation tooth (10) is provided on one side of the strip-shaped connecting portion (9); and a fixing tooth (11) is provided on the other side of the connecting portion (9). The strip-shaped connecting portion (9) has one side edge flush with one side edge of the iron ring (7), the fixed teeth (11) are arranged on one side of the connecting portion (9) that is flush with one side edge of the iron ring (7), the isolation teeth (10) are arranged in a strip shape, the strip-shaped isolation teeth (10) are arranged at equal intervals, the ends of the isolation teeth (10) are bent toward the iron ring (7), one end of the isolation teeth (10) is bent and fixed to one side edge of the iron ring (7), the fixed teeth (11) are bent toward the iron ring (7), and the fixed teeth (11) are bent and fixed to the other side edge of the iron ring (7).

2. The outer rotor of the electric vehicle hub motor with a spacer according to claim 1, characterized in that: At the opening of the isolation tooth (10) after being bent, the width of the opening edge is slightly greater than the width of the inner side.

3. The outer rotor of the electric vehicle hub motor with a spacer according to claim 1, characterized in that: An inner flange (6) is arranged at one end of the annular body (1), and a gap is arranged between the inner flange (6) and the iron ring (7), wherein the width of the gap is slightly greater than the length of the fixed tooth (11).

4. The outer rotor of the electric vehicle hub motor with a spacer according to claim 1, characterized in that: A gap is provided between the inner flange (6) and the iron ring (7), and the width of the gap is slightly greater than the thickness of the fixed tooth (11).

5. The outer rotor of the electric vehicle hub motor with a spacer according to claim 1, characterized in that: An annular groove is arranged inside the annular body (1). The width of the annular groove is equal to the width of the iron ring (7). The depth of the annular groove is one third to two thirds of the thickness of the iron ring (7).

6. The outer rotor of the electric vehicle hub motor provided with a spacer according to any one of claims 1 to 5, characterized in that: The width of the isolation tooth (10) is one sixth to one twelfth of the width of the magnetic steel.

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