Electric vehicle hub motor rotor with 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 inner side wall of the cylindrical body one (1) in the circumferential direction, an annular bracket (4) is provided on the inner side wall of the cylindrical body three (3) in the circumferential direction, a groove body (9) for placing a magnetic steel (5) is provided on the bracket (4), and a fixing piece for fixing the bracket (4) is provided on the outer circumferential direction of the bracket (4), wherein the fixing piece fixes the bracket (4) on the cylindrical body three (3). The present invention can improve the fixing effect of the bracket, arrange the magnetic steel in an orderly manner, and is conducive to the automated production of the electric vehicle hub motor rotor, thereby improving the 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 the production of electric vehicle hub motors. Background Art

[0002] The electric vehicle hub motor includes a rotor and a stator. The rotor is arranged on the periphery of the stator. A magnet is arranged in the rotor. The magnet is usually directly fixed to the inner wall of the rim. Generally, the magnet is directly attached to the inner wall of the rim with glue. However, after a long period of use, the magnet is easily fallen off due to factors such as aging of the glue or heat generated by the motor, causing the motor to fail to run and 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 application number 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 a magnetic steel fixing belt is provided along the circumferential direction of the inner wall of the wheel hub, and a groove substantially matching the outer dimensions of the magnetic steel is provided on the other side of the magnetic steel fixing belt relative to the inner wall of the wheel hub, 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.

[0004] The utility model adopts the structural design that the inner groove of the fixing belt and the magnetic steel are fixed correspondingly, 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.

[0005] 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

[0006] The problem to be solved by the present invention is the technical problem that the fixing effect between the magnet and the magnet fixing belt and between the magnet 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 beneficial to the fixed connection between the bracket and the electric vehicle rim and facilitates the installation of the magnet. It is also beneficial to further improve the fixed connection between the magnet and the rim, thereby further improving the quality of the motor.

[0007] 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 1, a cylindrical body 2 is respectively provided near both ends in the circumferential direction of the outer side of the cylindrical body 1, flanges are respectively provided at the two side ends of the outer side of the cylindrical body 2, the cylindrical body 1, the cylindrical body 2 and the flange are provided as an integral structure to form a rim, a cylindrical body 3 is provided in the circumferential direction of the inner side wall of the cylindrical body 1, and the cylindrical body 3 is directly injection molded with the rim when the rim is manufactured by injection molding, thereby increasing the connection strength between the cylindrical body 3 and the cylindrical body 1; the height of the cylindrical body 1 is greater than the height of the cylindrical body 3, so that the outer side wall of the cylindrical body 3 is completely in contact with the inner side wall of the cylindrical body 1, thereby increasing the connection strength between the cylindrical body 3 and the cylindrical body 1. An annular bracket is provided in the circumferential direction of the inner side wall of the cylindrical body 3, a slot body for placing magnetic steel is provided on the bracket, and a fixing member for fixing the bracket is provided in the outer circumferential direction of the bracket, and the fixing member fixes the bracket on the cylindrical body 3. The present invention mainly achieves the purpose of promoting the connection strength between the magnetic steel and the rim by setting the cylindrical body three, and achieves the purpose of automatic installation by setting the bracket. The cylindrical body one, the cylindrical body two and the flange can be formed by an integral molding method to form the rim of the electric vehicle wheel. 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 tire bead. The flange is slightly inclined toward the middle, and a deep groove is formed at the outer edge of the cylindrical body one at the opposite position of the cylindrical body two, 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.

[0008] As a further improvement measure of the present invention, the electric vehicle hub motor rotor provided with a bracket comprises an annular body and a dividing strip provided on the annular body, and the dividing strip serves to separate and guide the magnetic steel.

[0009] As a further improvement measure of the present invention, the electric vehicle hub motor rotor with a bracket is provided with a dividing strip vertically arranged on the annular body, and the dividing strips are arranged at intervals. The dividing strips cooperate with the annular body to form a slot body for placing magnetic steel. An opening is provided at one end of the slot body. When the magnetic steel is placed automatically, the magnetic steel can be placed into the slot body from the opening, thereby improving production efficiency.

[0010] As a further improvement measure of the present invention, the above-mentioned electric vehicle hub motor rotor with a bracket, the fixing part includes a pair of circular rings 1 and 2 arranged in the outer circumferential direction of the dividing strip, and the distance between circular rings 1 and 2 is the same as the height of the cylindrical body 3, so that circular rings 1 and 2 can be buckled on the upper and lower end surfaces of the cylindrical body 3 to achieve the fixing effect.

[0011] As a further improvement measure of the present invention, the electric vehicle hub motor rotor with a bracket is provided, and the ring 1 is arranged on the outer side of the upper end of the dividing strip, the ring 2 is arranged on the lower end of the dividing strip, and the ring 3 is arranged on the outer side of the annular body.

[0012] 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 dividing strip away from the end of one end of the annular body, and the guide surfaces are conducive to automated installation. When the magnet is placed, if the end of the magnet partially conflicts with the end of the dividing strip, the guide surface can achieve automatic adjustment, so that the magnet can be quickly placed in the slot.

[0013] As a further improvement measure of the present invention, in the above-mentioned electric vehicle hub motor rotor with a bracket, the guide surface of the dividing strip is set as an inclined surface or an arc surface, and the inclined surfaces or arc surfaces of adjacent dividing strips are arranged oppositely, so that the opening of the slot body is slightly larger than the width inside the slot body for easy installation.

[0014] As a further improvement measure of the present invention, in order to reduce magnetic leakage, the above-mentioned electric vehicle hub motor rotor with a bracket, the bracket, ring one and ring two are set to an integrated structure made of non-magnetic material, such as the non-magnetic material is set to one of a polyamide synthetic material or a synthetic resin or a carbon fiber reinforced epoxy resin composite material. In this way, the bracket has a certain strength and is resistant to high temperatures. In this way, when the heat generated by the rotor during operation causes the rotor temperature to rise, the bracket will not be deformed, thereby improving the quality of the motor.

[0015] As a further improvement measure of the present invention, the electric vehicle hub motor rotor with a bracket is provided with adhesive on the contact surfaces between the ring one and the upper end surface of the cylindrical body three, and between the ring two and the lower end surface of the cylindrical body three, so that the purpose of fixing the cylindrical body three and the bracket can be further achieved, and the fixing effect is better.

[0016] As another improvement measure of the present invention, the electric vehicle hub motor rotor with a bracket is provided with a clamping piece between the contact surface between the lower end face of the ring and the upper end face of the cylindrical body three, and between the upper end face of the ring two and the lower end face of the cylindrical body three, which can also serve the purpose of further fixing the cylindrical body three and the bracket.

[0017] 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 ring one and ring two, and fixing ring one and ring two on cylindrical body three, the fixing effect of the bracket can be improved; 3. By setting a guide surface, it is beneficial to place 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

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

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

[0020] Figure 3 yes Figure 2 Sectional view along AA direction.

[0021] Figure 4 It is a three-dimensional diagram of the bracket of the present invention.

[0022] Figure 5 yes Figure 4 Enlarged view of part I in the middle.

[0023] Figure 6 It is a top view of the bracket of the present invention.

[0024] Figure 7 This Figure 6 Cross-sectional view along the BB axis.

[0025] Explanation of the accompanying drawings: 1-cylindrical body 1, 2-cylindrical body 2, 3-cylindrical body 3, 4-bracket, 5-magnetic steel, 6-flange, 7-annular body, 8-dividing strip, 9-groove body, 10-circular ring 1, 11-circular ring 2, 12-guide surface. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] 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.

[0028] 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.

[0029] It should be noted that the terms "upper", "lower" and similar expressions used in this document are for illustrative purposes only.

[0030] like Figure 1 The 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, and flanges 6 are respectively arranged at the two ends of the outer side of the cylindrical body 2 2 in the circumferential direction. The cylindrical body 1, the cylindrical body 2 and the flange 6 can be formed into a rim of an electric vehicle wheel by an integral molding method. The edge of the rim is provided with a flange 6 with a shoulder for placing the tire bead. The flange 6 is slightly inclined toward the middle, and a deep groove is formed with the outer edge of the cylindrical body 1 at the opposite part 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. The cylindrical body 1, the cylindrical body 2 and the flange 6 are set as a rim made of non-magnetic conductive materials, which can reduce magnetic leakage, improve the quality of the motor, and improve the endurance of the motor.

[0031] like Figures 1 to 4 As shown, a cylindrical body 3 3 is provided on the inner side wall of the cylindrical body 1 in the circumferential direction. The present invention mainly achieves the purpose of promoting the connection strength between the magnetic steel and the rim by providing the cylindrical body 3 3. When the cylindrical body 3 is used to make the rim by injection molding, it is directly injection molded together with the rim to increase the connection strength between the cylindrical body 3 and the cylindrical body 1; of course, the cylindrical body 1 and the cylindrical body 3 3 can also be fixed with glue. The height of the cylindrical body 1 is greater than the height of the cylindrical body 3 3, so that the outer side wall of the cylindrical body 3 3 is completely in contact with the inner side wall of the cylindrical body 1, increasing the connection strength between the cylindrical body 3 3 and the cylindrical body 1. An annular bracket 4 is provided in the circumferential direction of the inner wall of the cylindrical body 3 3 , and the bracket 4 is closely attached to the inner wall of the cylindrical body 3 3 . A slot 9 for placing the magnetic steel 5 is provided on the bracket 4 . The bracket 4 is provided to place the magnetic steel 5 so that the magnetic steel 5 is arranged in an orderly manner. The width of the slot 9 is set according to the width of the magnetic steel 5 . Placing the magnetic steel 5 in the slot 9 can make the arrangement more orderly. However, the most important thing is that the bracket 4 can be provided to achieve the purpose of automatically installing the magnetic steel 5 , which is conducive to the automated production of the electric vehicle hub motor rotor and improves production efficiency. In the process of automated installation, the magnetic steel 5 needs to be pasted on the inner wall of the rim. If there is no bracket 4 , the pasting position will be inaccurate, affecting the product quality.

[0032] The bracket 4 includes an annular body 7 and a dividing bar 8 disposed on the annular body 7, and the dividing bar 8 serves to separate and guide the magnetic steel 5. The dividing bar 8 is vertically disposed on the annular body 7, and the dividing bars 8 are arranged at intervals to form a cylindrical shape. The dividing bars 8 cooperate with the annular body 7 to form a slot body 9 for placing the magnetic steel 5. An opening is disposed at one end of the slot body 9. When the magnetic steel 5 is placed automatically, the magnetic steel 5 can be placed into the slot body 9 from the opening, thereby improving production efficiency.

[0033] like Figures 4 to 7 As shown, guide surfaces 12 are provided on both sides of the end of the dividing bar 8 away from the annular body 7. The guide surfaces 12 are conducive to automated installation. When the magnetic steel 5 is placed, if the end of the magnetic steel 5 partially conflicts with the end of the dividing bar 8, the guide surfaces 12 can achieve the effect of automatic adjustment, so that the magnetic steel 5 can be quickly placed in the slot 9. The guide surface 12 of the dividing bar 8 can be set as an inclined surface or an arc surface, and the inclined surfaces or arc surfaces of adjacent dividing bars 8 are arranged oppositely, so that the opening of the slot body is slightly larger than the width of the slot body for easy installation. Placing the magnetic steel 5 in the automated production process can improve production efficiency.

[0034] like Figure 3 , Figure 4 , Figure 7As shown, a fixing member for fixing the bracket 4 is provided in the outer circumferential direction of the bracket 4, and the fixing member is used to fix the bracket 4 on the cylindrical body 3 3; the fixing member includes a pair of circular rings 10 and 11 arranged in the outer circumferential direction of the dividing strip 8, the circular ring 10 is arranged outside the upper end of the dividing strip 8, the circular ring 2 11 is arranged outside the lower end of the dividing strip 8, and the circular ring 2 11 can also be arranged outside the annular body 7 and connected to the annular body 7, and the spacing between the circular ring 10 and the circular ring 2 11 is the same as the height of the cylindrical body 3 3, so that the circular ring 10 and the circular ring 2 11 can be buckled on the upper and lower end surfaces of the cylindrical body 3 3 to achieve the fixing effect. When the circular ring 10 and the circular ring 2 11 are buckled on the upper and lower end surfaces of the cylindrical body 3 3, the dividing strip 8 is closely matched with the inner side wall of the cylindrical body 3 3, which plays a fixing role on the bracket 4. In order to further improve the fixing effect of the ring 10 and the ring 2 11, glue is provided between the contact surface between the ring 10 and the upper end surface of the cylindrical body 3 3, and glue is also provided on the contact surface between the ring 2 11 and the lower end surface of the cylindrical body 3 3. This can make the fixing effect of the ring 10 and the cylindrical body 3 3 better, which can further achieve the purpose of fixing the cylindrical body 3 3 and the bracket 4. Of course, in order to achieve the purpose of fixing the cylindrical body three 3 and the bracket 4, a clamping piece can also be provided between the contact surfaces between the lower end surface of the ring one 10 and the upper end surface of the cylindrical body three 3, and between the upper end surface of the ring two 11 and the lower end surface of the cylindrical body three 3. For example, the clamping piece can be provided with protrusions on the lower end surface of the ring one 10 and the upper end surface of the ring two 11, respectively, and grooves on the upper end surface and the lower end surface of the cylindrical body three 3, respectively. Through the cooperation of the protrusions and the grooves, the purpose of further fixing the cylindrical body three 3 and the bracket 4 can also be achieved. The present invention can improve the fixing effect of the bracket 4 by providing the ring one 10 and the ring two 11, and fixing the ring one 10 and the ring two 11 on the cylindrical body three 3.

[0035] In the manufacturing process of the present invention, a mold is first manufactured, and a cylindrical body 3 is placed in the mold, and then the cylindrical body 1, the cylindrical body 2 and the flange 6 are molded together with the cylindrical body 3 by injection molding; in addition, the bracket 4 is produced by injection molding, so that the annular body 7, the dividing strip 8, the circular ring 10 and the circular ring 2 11 are integrally molded, and then the bracket 4 is fixed on the cylindrical body 3, and glue is applied to the inner wall of the cylindrical body 3, and then the magnetic steel 5 is placed in the groove body 9 by an automated mechanical device, so that the magnetic steel 5 is fixed on the cylindrical body 3, and the rotor production is completed.

[0036] 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 electric vehicle hub motor rotor provided with a bracket, comprising a cylindrical body (1), a cylindrical body (2) provided near both ends of the outer circumferential direction of the cylindrical body (1), flanges (6) provided at both ends of the outer circumferential direction of the cylindrical body (2), 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 inner side wall of the cylindrical body one (1) in the circumferential direction, the height of the cylindrical body one (1) is greater than the height of the cylindrical body three (3), an annular bracket (4) is arranged on the inner side wall of the cylindrical body three (3) in the circumferential direction, a groove (9) for placing a magnetic steel (5) is arranged on the bracket (4), a fixing member for fixing the bracket (4) is arranged on the outer circumferential direction of the bracket (4), the fixing member fixes the bracket (4) on the cylindrical body three (3), the bracket (4) comprises an annular body (7) and a dividing strip (8) arranged on the annular body (7), the dividing strip (8) is vertically arranged on the annular body (7), and the dividing strip (8) is spaced The partition bar (8) cooperates with the annular body (7) to form a groove body (9) for placing the magnetic steel (5), one end of the groove body (9) is provided with an opening, and the fixing member includes a pair of circular rings 1 (10) and 2 (11) arranged in the outer circumferential direction of the partition bar (8), the distance between the circular rings 1 (10) and 2 (11) is the same as the height of the cylindrical body 3 (3), the circular ring 1 (10) is arranged on the outer side of the upper end of the partition bar (8), the circular ring 2 (11) is arranged on the outer side of the lower end of the partition bar (8), and the circular ring 2 (11) is arranged on the outer side of the annular body (7), and the partition bar (8) is provided with guide surfaces (12) on both sides of one end away from the annular body (7).

2. The electric vehicle hub motor rotor with a bracket according to claim 1, characterized in that: The guide surface of the dividing strip (8) is arranged as an inclined surface or an arc surface, and the inclined surfaces or arc 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 any one of claims 1 to 2, characterized in that: The bracket (4), the first circular ring (10) and the second circular ring (11) are configured as an integral structure made of non-magnetic conductive material.

4. The electric vehicle hub motor rotor provided with a bracket according to claim 3, characterized in that: The contact surfaces between the circular ring 1 (10) and the upper end surface of the cylindrical body 3 (3), and between the circular ring 2 (11) and the lower end surface of the cylindrical body 3 (3) are provided with adhesive.

5. The electric vehicle hub motor rotor provided with a bracket according to claim 3, characterized in that: A clamping piece is provided between the contact surfaces between the lower end surface of the circular ring 1 (10) and the upper end surface of the cylindrical body 3 (3), and between the contact surfaces between the upper end surface of the circular ring 2 (11) and the lower end surface of the cylindrical body 3 (3).

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