A hub motor rotor for electric vehicle provided with a bracket

Abstract

The present invention discloses an electric vehicle hub motor rotor provided with a bracket, belonging to the technical field of motor equipment parts, comprising a cylindrical body one (1), a cylindrical body two (2) and a flange (6), wherein a cylindrical body three (3) is provided on the circumferential direction of the inner wall of the cylindrical body one (1), an annular bracket (4) is provided on the circumferential direction of the inner wall of the cylindrical body three (3), a groove body (9) is provided on the bracket (4), an annular body (5) is provided on the outer circumferential direction of the bracket (4), an annular groove (7) is provided on the inner wall of the cylindrical body three (3), and the annular body (5) is arranged in the annular groove (7); the present invention can improve the fixing effect of the bracket, is conducive to the placement of magnetic steel, is conducive to the automated production of electric vehicle hub motor rotors, and improves 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 rotor provided with a bracket and applied to an electric vehicle hub motor. Background Art

[0002] In the prior art, the magnets in the rotor of an electric vehicle hub motor are usually directly connected to the inner wall of the hub, usually by using glue to stick the magnets directly to the inner wall of the hub. Factors such as glue aging or heat generated by the motor can easily cause the magnets to fall off, affecting the quality of the motor. Moreover, this connection method can generally only be completed manually and cannot be completed in automated production.

[0003] In order to solve the problem that the magnetic steel cannot be automatically installed on the inner wall of the wheel hub, a Chinese utility model patent with an application date of April 26, 2011 and an application number of 201120125123.X discloses a fixing structure of a motor magnetic steel for electric vehicles, including an electric bicycle wheel hub and a magnetic steel, wherein the inner wall of the wheel hub is provided with a magnetic steel fixing belt along the circumferential direction, and the other side of the magnetic steel fixing belt relative to the inner wall of the wheel hub is provided with a groove that basically matches the outer size of the magnetic steel, and the magnetic steel is installed in the fixing belt groove. The magnetic steel fixing belt is fixed to the inner wall of the wheel hub with glue or adhesive patch, and the magnetic steel fixing belt is made of plastic, and glue or adhesive patch is applied at the contact between the magnetic steel and the fixing belt groove. In terms of structural design, the utility model adopts the corresponding fixing of the inner groove of the fixing belt and the magnetic steel, so as to realize the automatic arrangement of the magnetic steel. At the same time, due to the isolation of the fixing belt, the problem of adjacent magnetic steels attracting each other due to different polarities is solved, which is efficient and reduces costs.

[0004] However, in the above technology, the magnetic steel fixing belt and the inner wall of the wheel hub are directly fixed and connected with glue or adhesive patch, and glue or adhesive patch is coated on the contact between the magnetic steel and the groove of the magnetic steel fixing belt. Since the contact area between the magnetic steel fixing belt and the inner wall of the wheel hub is very small, the bonding effect between the magnetic steel fixing belt and the inner wall of the wheel hub is poor. On the other hand, the contact area between the magnetic steel and the annular groove of the fixing belt is also very small, which results in poor fixing effect between the magnetic steel and the magnetic steel fixing belt, which can easily cause the magnetic steel to fall off and affect the normal operation of the motor. Summary of the invention

[0005] The problem to be solved by the present invention is the technical problem that the fixing effect between the magnetic steel and the magnetic steel fixing belt and between the magnetic steel fixing belt and the wheel hub in the prior art is not good. An electric vehicle hub motor rotor with a bracket is provided, which is conducive to the connection between the magnetic steel fixing belt and the wheel hub; at the same time, it is also conducive to further improving the connection between the magnetic steel and the wheel hub, and further improving the quality of the motor.

[0006] In order to solve the above technical problems, the present invention provides an electric vehicle hub motor rotor provided with a bracket, comprising a cylindrical body one, a cylindrical body two is respectively arranged near both ends in the circumferential direction of the outer side of the cylindrical body one, 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 to form a rim, a cylindrical body three is arranged in the circumferential direction of the inner wall of the cylindrical body one, an annular bracket is arranged in the circumferential direction of the inner wall of the cylindrical body three, a groove body for placing magnetic steel is arranged on the bracket, an annular body is arranged in the outer circumferential direction of the bracket, an annular groove matching the annular body is arranged on the inner wall of the cylindrical body three, and the annular body is arranged in the annular groove. The rim of an electric vehicle wheel can be formed by integrally molding the cylindrical body 1, the cylindrical body 2 and the flange. A deep groove is formed in the middle of the cross section of the rim, and a flange with a shoulder is provided on the edge for placing the bead of the tire. The flange is slightly inclined toward the middle, and a deep groove is formed at the outer edge of the cylindrical body 1 at the opposite position of the cylindrical body 2, so that the tire can be easily disassembled and assembled. The rim of the present invention has a simple structure, a small mass, and a large rigidity, and is suitable for small-sized tires with large elasticity.

[0007] In the present invention, when the rim is made of non-magnetic material, since the fixing effect after being pasted with the magnetic steel is not ideal, a cylindrical body three is arranged on the inner side of the rim. The cylindrical body three is directly injection molded with the rim when the rim is manufactured, thereby increasing the connection strength between the cylindrical body three and the cylindrical body one; the material of the cylindrical body three can be a steel ring, which is beneficial to increasing the fixing effect of the magnetic steel and the cylindrical body three; in order to better fix the bracket and prevent the bracket from falling off, an annular body is arranged in the outer circumferential direction of the bracket, and an annular groove is arranged in the cylindrical body three, so that when the annular body is engaged in the annular groove, the bracket can be fixed; on the other hand, by pasting the magnetic steel on the surface of the cylindrical body three, the bonding surface between the magnetic steel and the cylindrical body three can be increased, thereby improving the fixing effect of the magnetic steel.

[0008] As a further improvement measure of the present invention, the above-mentioned electric vehicle hub motor rotor is provided with a bracket, and the bracket and the annular body five are arranged as an integral structure made of non-magnetic material, preferably arranged as high temperature resistant material; in order to reduce magnetic leakage, a bracket made of non-magnetic material is used, such as polyamide synthetic material or synthetic resin or carbon fiber reinforced epoxy resin composite material and the like, and the bracket and the annular body five are arranged as an integral structure to enhance the fixing effect of the bracket and the cylindrical body three, and the annular body can strengthen the strength of the bracket, so that the bracket is not easy to deform; when the rotor is working, heat is generated, resulting in a temperature increase, and the materials used for the bracket and the annular body five must also be able to withstand a certain temperature.

[0009] As a further improvement measure of the present invention, in the above-mentioned electric vehicle hub motor rotor provided with a bracket, the annular body five is set to 1-5, and multiple annular bodies five are set to enhance the connection strength between the bracket and the magnetic steel ring.

[0010] As a further improvement measure of the present invention, the above-mentioned electric vehicle hub motor rotor is provided with a bracket, and the bracket includes an annular base plate, and dividing strips are arranged on the ring of the base plate perpendicular to the base plate, and the dividing strips are arranged at intervals. The dividing strips cooperate with the base plate to form a groove body for placing magnetic steel. The base plate serves as the main body of the bracket and limits the position of the magnetic steel. The dividing strips serve to separate the magnetic steel. By setting the bracket, automated installation can be carried out to improve production efficiency.

[0011] As a further improvement measure of the present invention, in the above-mentioned electric vehicle hub motor rotor provided with a bracket, guide surfaces are provided on both sides of the end portion of the dividing strip away from the bottom plate, and the guide surfaces are arranged as inclined surfaces or curved surfaces, and the inclined surfaces or curved surfaces of adjacent dividing strips are arranged opposite to each other, so that the width of the openings at the relative positions between the dividing strips is greater than the width between the inside of the dividing strips, which is beneficial to the installation of the magnet during automated operation and can enable the magnet to be accurately placed in the slot between the dividing strips.

[0012] As a further improvement measure of the present invention, in the above-mentioned electric vehicle hub motor rotor provided with a bracket, the contact between the annular body five and the inner wall of the annular groove is provided with adhesive, which can make the connection between the bracket and the cylindrical body three tighter and the fixing effect better.

[0013] As another improvement measure of the present invention, in the above-mentioned electric vehicle hub motor rotor provided with a bracket, a clamping piece is provided at the contact point between the annular body five and the inner wall of the annular groove, and the clamping piece can make the connection between the bracket and the cylindrical body three tighter and the fixing effect better.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting a bracket for placing magnetic steel, the magnetic steel can be arranged in an orderly manner, which is beneficial to the automated production of the electric vehicle hub motor rotor and improves production efficiency; 2. By setting an annular body and an annular groove and fixing the annular body in the annular groove, the fixing effect of the bracket can be improved; 3. By setting a guide surface, it is beneficial to place the magnetic steel in the automated production process and improve production efficiency; 4. By setting a rim made of non-magnetic material, magnetic leakage can be reduced, the quality of the motor can be improved, and the endurance of the motor can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a perspective view of the present invention.

[0016] Figure 2 It is a top view of the present invention.

[0017] Figure 3 yes Figure 2 Sectional view along AA direction.

[0018] Figure 4 It is a three-dimensional diagram of the bracket of the present invention.

[0019] Figure 5 It is a top view of the bracket of the present invention.

[0020] Figure 6 yes Figure 5 Cross-sectional view along the BB axis.

[0021] Figure 7 It is a three-dimensional diagram of the wheel rim and the magnetic steel ring of the present invention.

[0022] Figure 8 It is a top view of the wheel rim and the magnetic steel ring of the present invention.

[0023] Fig. 9 yes Figure 8 Sectional view along CC direction.

[0024] Explanation of the accompanying drawings: 1-cylindrical body 1, 2-cylindrical body 2, 3-cylindrical body 3, 4-bracket, 5-annular body, 6-flange, 7-annular groove, 8-dividing bar, 9-groove body, 10-magnetic steel, 11-bottom plate, 12-guide surface. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 4 , Figure 7The electric vehicle hub motor rotor with a bracket shown in the figure comprises a cylindrical body 1, a cylindrical body 2 2 is respectively arranged near both ends in the circumferential direction of the outer side of the cylindrical body 1, flanges 6 are respectively arranged at the two side ends of the outer side of the cylindrical body 2 2 in the circumferential direction, the cylindrical body 1, the cylindrical body 2 2 and the flange 6 are arranged as an integral structure to form a rim, a cylindrical body 3 3 is arranged in the circumferential direction of the inner side wall of the cylindrical body 1, an annular bracket 4 is arranged in the circumferential direction of the inner side wall of the cylindrical body 3 3, and a magnetic steel 10 is arranged on the bracket 4. The groove body 9 is provided with an annular body 5 in the outer circumferential direction of the bracket 4. The annular body 5 can increase the strength of the bracket 4 and make it less likely to be excessively deformed. An annular groove 7 matching the annular body 5 is provided on the inner wall of the cylindrical body three 3. The annular body 5 is arranged in the annular groove 7. The annular groove 7 is arranged in the axial middle position of the cylindrical body three 3. The annular body 5 can also be arranged in the middle position of the axial periphery of the bracket 4. The position of the annular groove 7 is to determine the position of the bracket 4. The installation position of the magnetic steel 10 is determined by the position of the bracket 4. The rim of the electric vehicle wheel can be formed by integrally molding the cylindrical body 1, the cylindrical body 2 and the flange 6, and a deep groove is formed in the middle of the cross section of the rim to form a bead for placing the tire; if a flange 6 with a shoulder is provided on the edge, the flange 6 is slightly inclined toward the middle, and a deep groove is formed on the opposite surface of the cylindrical body 2 and the outer edge of the cylindrical body 1, which is used to place the tire and facilitate the disassembly and assembly of the tire. The rim of the present invention has a simple structure, small mass, high rigidity, and is suitable for small-sized tires with large elasticity.

[0029] like Figure 2 , Figure 3 , Figures 7 to 9 As shown, a cylindrical body 3 3 is provided on the inner side of the rim, and the material of the cylindrical body 3 3 can be made of stainless steel to form a magnetic steel ring, which is beneficial to increase the fixing effect of the magnetic steel 10 and the magnetic steel ring; in order to better fix the bracket 4 and prevent the bracket 4 from falling off, an annular body 5 is provided in the outer circumferential direction of the bracket 4, and an annular groove 7 is provided in the cylindrical body 3 3, so that when the annular body 5 is engaged in the annular groove 7, the bracket 4 can be fixed; on the other hand, by pasting the magnetic steel 10 on the surface of the cylindrical body 3 3, the bonding surface between the magnetic steel 10 and the cylindrical body 3 3 can be increased, thereby improving the fixing effect of the magnetic steel 10.

[0030] In order to further improve the fixing effect between the annular body 5 5 and the cylindrical body 3 3, adhesive is provided at the contact between the annular body 5 5 and the inner side wall of the annular groove 7. During assembly, adhesive is first applied to the annular groove 7, and then the bracket 4 is placed inside the cylindrical body 3 3, and the annular body 5 5 is clamped in the annular groove 7, so that the annular body 5 5 is bonded in the annular groove 7, so that the connection between the bracket 4 and the cylindrical body 3 3 is tighter, the fixing effect is better, and the connection strength between the bracket 4 and the cylindrical body 3 3 is improved. As another solution, a clamping member can also be provided at the contact between the annular body 5 5 and the inner side wall of the annular groove 7, such as protrusions are provided on the upper and lower surfaces of the annular body 5 5, and grooves are provided on the upper and lower side surfaces of the annular groove 7. When the annular body 5 5 is clamped in the annular groove 7, the protrusions and the grooves are matched to achieve the fixing effect, so that the connection between the bracket 4 and the cylindrical body 3 3 is tighter and the fixing effect is better.

[0031] like Figures 1 to 6 In the electric vehicle hub motor rotor provided with a bracket, in order to reduce magnetic leakage, the bracket 4 and the annular body 5 are made of non-magnetic materials, such as plastic, nylon and other materials, and are formed into an integral structure by injection molding, which is convenient for processing. The bracket 4 and the annular body 5 are set as an integral structure, which can enhance the fixing effect of the bracket 4 and the cylindrical body 3, increase the strength of the bracket 4, and the bracket 4 is preferably set as a high-temperature resistant material; because the rotor generates heat when working, causing the temperature to rise, the materials used for the bracket 4 and the annular body 5 5 must also be able to withstand a certain temperature, so that the bracket 4 and the annular body 5 5 can be prevented from being deformed due to the influence of the temperature rise, thereby affecting the relative rotation between the motor rotor and the stator. The number of the annular body 5 can be 1-5, and the number of the annular body 5 is not limited to only one. Setting multiple annular bodies 5 can also strengthen the connection strength between the bracket 4 and the annular body 5; when multiple annular bodies 5 are set, the corresponding annular grooves 7 are also set to multiple, and the number is the same as the annular body 5; the annular body 5 is positioned on the outer circumference of the bracket 4 and arranged at equal intervals, so that the force on the bracket 4 is uniform.

[0032] like Figures 4 to 9As shown, the bracket 4 includes a circular ring-shaped bottom plate 11, and a dividing strip 8 is vertically arranged on the ring of the bottom plate 11 and arranged at intervals. The dividing strips 8 cooperate with the bottom plate 11 to form a slot body 9 for placing the magnetic steel 10. The bottom plate 11 is the main part of the bracket 4. On the one hand, it limits the position of the magnetic steel 10. When the magnetic steel 10 is automatically placed by an automated device, the magnetic steel 10 only needs to be placed in the slot body 9. When one end of the magnetic steel 10 contacts the bottom plate 11, all the magnetic steels 10 can be arranged neatly. On the other hand, the bottom plate 11 is used to set the dividing strip 8, and the dividing strip 8 plays the role of separating the magnetic steel 10. The slot body 9 is used to place the magnetic steel 10. The size of the slot body 9 can be changed according to the arrangement spacing of the dividing strips 8, and the size of the slot body 9 can be adapted according to the size of the magnetic steel 10. By setting the bracket 4, automated installation can be performed to improve production efficiency. As a further improvement method of the present invention, guide surfaces 12 are provided on both sides of the end of the dividing strip 8 away from the bottom plate 11. The guide surfaces 12 play a guiding role. The guide surfaces 12 can be set as inclined surfaces or curved surfaces. The inclined surfaces or curved surfaces of adjacent dividing strips 8 are relatively arranged, so that the width of the openings at the relative positions between the dividing strips 8 is greater than the width between the insides of the dividing strips 8. During automated operation, it is beneficial to the installation of the magnetic steel 10, and the magnetic steel 10 can be quickly placed in place and accurately placed in the groove body 9 between the dividing strips 8.

[0033] 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. A hub motor rotor for an electric vehicle provided with a bracket, comprising a cylindrical body (1), a cylindrical body (2) provided near both ends of the outer side of the cylindrical body (1) in the circumferential direction, flanges (6) provided at both ends of the outer side of the cylindrical body (2) in the circumferential direction, the cylindrical body (1), the cylindrical body (2) and the flanges (6) being provided as an integral structure to form a wheel rim, characterized in that: A cylindrical body three (3) is arranged on the circumferential direction of the inner wall of the cylindrical body one (1), an annular bracket (4) is arranged on the circumferential direction of the inner wall of the cylindrical body three (3), a groove (9) for placing a magnetic steel (10) is arranged on the bracket (4), an annular body (5) is arranged on the outer circumferential direction of the bracket (4), an annular groove (7) matching with the annular body (5) is arranged on the inner wall of the cylindrical body three (3), the annular body (5) is arranged in the annular groove (7), the bracket (4) and the annular body (5) are arranged as an integrated structure made of high temperature resistant non-magnetic conductive material, the high temperature resistant The non-magnetic conductive material is set to nylon or plastic, the number of the annular bodies (5) is set to 1-5, the bracket (4) includes a circular ring-shaped base plate (11), a partition bar (8) is arranged on the circular ring of the base plate (11) perpendicular to the base plate (11), the partition bars (8) are arranged at intervals, the partition bars (8) cooperate with the base plate (11) to form a groove body (9) for placing the magnetic steel (10), and the two sides of the partition bar (8) away from one end of the base plate (11) are provided with guide surfaces (12), and the cylindrical body 1 (1), the cylindrical body 2 (2) and the flange (6) are set to be an integrated structure made of non-magnetic conductive material.

2. The electric vehicle hub motor rotor provided with a bracket according to claim 1, characterized in that: The guide surfaces on both sides of the end of the dividing strip (8) away from the bottom plate (11) are arranged as inclined surfaces or curved surfaces, and the inclined surfaces or curved surfaces of adjacent dividing strips (8) are arranged opposite to each other.

3. The electric vehicle hub motor rotor provided with a bracket according to claim 1, characterized in that: Adhesive is provided at the contact point between the annular body (5) and the inner side wall of the annular groove (7).

4. The electric vehicle hub motor rotor provided with a bracket according to claim 1, characterized in that: A clamping piece is provided at the contact point between the annular body (5) and the inner side wall of the annular groove (7).

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