CN111404297A - Outer rotor of hub motor of electric vehicle - Google Patents

Abstract

The invention discloses an outer rotor of an electric vehicle hub motor, which belongs to the technical field of motor equipment and comprises a rim (1), magnetic conductive iron cores (2) and permanent magnets (3), wherein the rim (1) comprises a first annular body (101) and a fixed block (104), the width of the interval of the part, close to the first annular body (101), on the fixed block (104) is smaller than the width of the maximum interval of the part, far away from the first annular body (101), on the magnetic conductive iron cores (2), groove bodies (201) are arranged, the fixed block (104) is installed in the groove bodies (201), gaps are formed between the adjacent magnetic conductive iron cores (2), and the permanent magnets (3) are arranged in the gaps.

Description

An electric wheel hub motor outer rotor

technical field

The invention belongs to the technical field of electrical equipment, and in particular relates to an electric wheel hub motor outer rotor used for driving electric vehicles and the like.

Background technique

Due to its advantages of economy, convenience and environmental protection, electric bicycles have become the mainstream of personal urban transportation. They have gradually replaced traditional bicycles and motorcycles and entered the market in large numbers, and the number in the market has gradually increased. However, the key factor restricting the development of electric vehicles and bicycles at present is that the dynamic performance and continuation ability of electric vehicles need to be further improved. The fundamental reason is that the magnetic leakage of the magnets in the motor rotor is relatively serious. Therefore, how to improve the efficiency of the motor and reduce the energy consumption of the motor has become the development direction of the motor. Permanent magnet motors have the advantages of simple structure, reliable operation, small size, light weight, low loss, high efficiency, low noise, and the shape and size of the motor can be easily changed, so they have been widely used in various fields.

On the filing date of November 05, 2018, the Chinese invention patent with the application number of 2018113064512 discloses a concave-convex pole magnetic levitation in-wheel motor and a control method thereof, including a stator winding assembly, a connection for connecting the stator winding assembly and a steering mechanism an assembly, a permanent magnet rotor assembly coaxially disposed outside the stator winding assembly, and a tire assembly disposed outside the permanent magnet rotor assembly, the stator winding assembly comprising a stator shaft, an annular non-conductive magnetic body fixed outside the stator shaft for shielding a magnetic field and a plurality of sets of windings radially arranged on the outside of the stator shaft with the axis of the stator shaft as the center; the permanent magnet rotor assembly includes a plurality of permanent magnets and a spaced non-magnetic conductive sheet arranged between two adjacent permanent magnets; a plurality of permanent magnets Together with the spaced non-magnetic conductive sheets, a ring-shaped structure with the axis of the stator shaft as the axis is formed; wherein, any two adjacent permanent magnets are opposite to the magnetic field direction of the axis of the stator shaft as the axis; Three-phase electricity with a phase difference of 120 degrees is passed through the windings, so that any group of the multiple sets of windings arranged outside the stator shaft can generate periodic alternating longitudinal suspension force and rotational driving force on the permanent magnet rotor assembly, so that the permanent magnet rotor The rotor assembly is suspended and rotates about the axis of the stator shaft. The tire assembly is arranged on the outer circumferential surface of the permanent magnet rotor assembly to form a magnetic levitation motor, so that the structure is simple and the cost is reduced.

The above method, like the traditional method, cannot solve the serious problem of magnetic flux leakage of the magnets in the rotor. In order to solve the magnetic leakage problem of the magnets in the rotor, the applicant applied for a utility model patent with the application number of 2019218170734 on October 27, 2019, named as a kind of in-wheel motor, which includes bearings, stators, rotors and end covers. The in-wheel motor can solve the serious problem of magnetic leakage of the magnetic steel in the rotor, improve the utilization efficiency of electric energy, and improve the performance of the motor. It can effectively improve the power performance and cruising range of electric vehicles. However, in the rotor of the above-mentioned motor, since the magnetic core and the annular body are directly fixed by anaerobic glue, in the actual use process, the fixing capacity is not enough. Strong, it is easy to cause the magnetic core to fall off, affecting the normal operation of the motor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the technical problem that the fixing ability between the magnetic conducting core and the annular body 1 in the prior art is not strong enough, and the magnetic conducting core is prone to fall off, and provides a kind of The outer rotor of the electric wheel hub motor can be effectively fixed to prevent the conductive magnet core from falling off, and can effectively reduce the magnetic flux leakage of the magnet, and can effectively improve the electric energy use efficiency.

In order to solve the above technical problems, the present invention provides an outer rotor of an electric wheel hub motor, which includes a rim, a magnetic core and a permanent magnet. Two annular bodies are respectively arranged near the two ends of the second ring, and flanges are respectively provided on both sides of the outer circumferential side of the annular body two. The inner side wall of the annular body 1 is provided with a fixing block in the circumferential direction, and the fixing block and the annular body 1 are integrally formed. The said conductive magnet core is fixedly arranged on the inner side of the ring body 1 after being stacked, the said conductive magnet core is opposite to the ring body 1 and is provided with a groove body matched with a fixing block, and the fixing block is arranged in the groove body, and is opposite to the ring body 1. A gap is set between the adjacent conductive magnet cores, and a columnar permanent magnet is set in the gap. The fixing block is used to fix the magnetic conductor core. In the prior art, since the magnetic conductor core and the annular body 1 are only fixed by anaerobic glue, the fixing effect is not good enough; in the in-wheel motor that the applicant has applied for, Although a depression is arranged at the opposite part of the conductive core and the annular body to increase the amount of anaerobic glue and enhance the bonding ability, due to the high torque of the conductive core during the high-speed rotation of the rotor, the conductive core has a relatively large weight. However, the problem of the magnetic conducting core falling off cannot be completely solved. The purpose of the present application is to ensure that the magnetic conducting core and the annular body 1 are fixedly connected without falling off.

As a further improvement measure of the present invention, the above-mentioned outer rotor of an electric wheel hub motor is provided with an annular body 3 at one end of the inner circumferential direction of the annular body 1, and the annular body 3 and the annular body 1 have an integral structure, The thickness between the inner side wall 3 and the outer side wall 1 of the annular body 3 is smaller than the thickness between the inner side wall 2 and the outer side wall 2 of the magnetic conducting core. The cores are arranged neatly, and it is also convenient to apply anaerobic glue to achieve further fixing.

As a further improvement measure of the present invention, in the above-mentioned outer rotor of an electric wheel hub motor, the fixing block is in the shape of a long strip, and the axial direction of the long strip is parallel to the axial direction of the outer rotor. It is inserted into the groove of the magnetic core to play a fixed role.

As a further improvement measure of the present invention, in the above-mentioned outer rotor of an electric wheel hub motor, the radians between the inner side wall of the annular body 1 and the adjacent fixed blocks are equal, so that the fixed blocks are evenly arranged, and the conductive core can also be Arrange evenly.

As a further improvement measure of the present invention, in the above-mentioned outer rotor of an electric wheel hub motor, the slot body of the conductive magnet core is arranged on the side opposite to the inner side wall of the annular body, and the slot body is connected to the annular body. There is an opening at the opposite side of the tank body, and the spacing between the openings in the tank body is smaller than the spacing at the largest part of the tank body, that is, the opening of the tank body is small, and the internal spacing is large, which can prevent the fixed block from falling off from the opening of the tank body; The opposite openings of the body are set in an arc shape, which facilitates the insertion of the fixing block into the groove body.

As a further improvement measure of the present invention, the above-mentioned outer rotor of an electric wheel hub motor is provided with a buckle point on the conductive core, the buckle point forms a groove on one side, and a protrusion on the other side, and the upper and lower adjacent conductive cores are formed between The buckle points between them are in an interference fit with each other, that is, the protrusions of the upper guide cores and the grooves of the next guide cores are in an interference fit with each other, so as to achieve the purpose of self-buckling and make the guide cores more firmly fixed.

As a further improvement measure of the present invention, in the above-mentioned outer rotor of an electric wheel hub motor, the two sides of the magnetic conducting core take the central axis as the axis of symmetry, and are arranged in an inclined shape, and the conducting magnetic core is away from the opening side of the slot body. Lateral bumps are arranged on both sides of the end face, the bumps can reduce the cogging torque, improve the saliency of the motor, and at the same time have the function of limiting the installation of the magnet.

As a further improvement measure of the present invention, in the above-mentioned outer rotor of an electric wheel hub motor, the first annular body, the second annular body, the third annular body, and the fixing block are arranged as an integral structure composed of non-magnetic conductive materials. The non-magnetic conductive material is set as one of thermosetting resin material, carbon fiber composite material and metal alloy material; the thermosetting resin material is set as phenolic resin or epoxy resin or unsaturated polyester resin; The magnetically conductive material is set as a non-magnetically conductive carbon fiber composite material; the non-magnetically conductive material is set as a metal alloy material, and the metal alloy material is set as one of aluminum-zinc alloy, aluminum-magnesium alloy, and aluminum-copper alloy or several. The thermosetting resin material is set to be phenolic resin or epoxy resin or unsaturated polyester resin. The above materials are diamagnetic, which can reduce the leakage of magnetic steel. The non-magnetically conductive material can also be set as a non-magnetically conductive carbon fiber composite material; the non-magnetically conductive material can also be set as a metal alloy material, and the metal alloy material can be set as aluminum-zinc alloy, aluminum-magnesium alloy, One or more of the aluminum-copper alloys, the above-mentioned materials can reduce the magnetic flux leakage of the magnetic steel, and the effect is better.

As a further improvement measure of the present invention, the above-mentioned outer rotor of an electric in-wheel motor has an inclined cross-section at the opposite position of the two annular bodies for placing tires. An inclined through hole penetrating through each other is arranged therebetween, and the through hole is used for installing the valve.

As a further improvement measure of the present invention, the above-mentioned outer rotor of an electric wheel hub motor is provided with grooves on both ends of the annular body 2 to reduce weight; A fixing hole is set on the upper part, and the fixing hole is used to fix the motor end cover.

Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A fixing block is arranged on the inner side wall of the annular body 1 in the circumferential direction, a groove body is arranged on the conductive magnet core, and the fixing block is used to cooperate with the groove body. , to achieve the effect of fixing the magnetic core on the inner side wall of the annular body 1, and then adding anaerobic glue, so that the fixing effect of the magnetic core is better, and the quality of the electric wheel hub motor can be further improved.

2. By disposing the annular body 3 at one end of the inner circumferential direction of the annular body 1, the conductive core and the permanent magnet can be easily installed, the processing efficiency of the outer rotor can be improved, and the product quality of the outer rotor can be improved.

3. A ring body made of non-magnetic conductive material is provided, a magnetic conductive core made of magnetic conductive material is arranged on the inner side of the annular body 1, a permanent magnet is arranged between the magnetic conductive cores, and the permanent magnet is fixed on the magnetic conductive core In between, this is conducive to the concentrated distribution of the magnetic field, which can reduce the magnetic leakage phenomenon of the magnetic steel.

4. The first ring body, the second ring body, the third ring body, and the fixed block are set as an integrated structure composed of non-magnetic conductive materials, which can reduce the magnetic leakage of the magnetic steel.

5. The in-wheel motor manufactured by using the outer rotor of the present invention has a simple structure, can control the torque in a wide speed range, has a fast response speed, can improve the utilization rate of electric energy, and can improve the cruising range of the electric vehicle.

Description of drawings

FIG. 1 is one of the perspective views of the present invention.

FIG. 2 is a front view of the present invention.

Figure 3 is a plan view of the present invention.

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3 .

FIG. 5 is a second perspective view of the present invention.

FIG. 6 is a top view of the conductive core of the present invention.

Figure 7 is a top view of the rim of the present invention.

FIG. 8 is a sectional view taken along the line B-B in FIG. 7 .

FIG. 9 is a sectional view taken along the line C-C in FIG. 7 .

Reference number description: 1-rim, 101-ring body one, 102-ring body two, 103-flange, 104-fixing block, 105-ring body three, 106-inner side wall three, 107-outer wall One, 108-inner side wall one, 109-through hole, 110-groove, 111-reinforcing rib, 112-fixing hole, 2-conducting magnet core, 201-slot body, 202-inner sidewall two, 203-outer sidewall two , 204- Opening, 205- Buckle point, 206- Center shaft, 207- Bump, 3- Permanent magnet.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

On the contrary, the present invention covers any alternatives, modifications, equivalents and arrangements within the spirit and scope of the present invention as defined by the appended claims. Further, in order to give the public a better understanding of the present invention, some specific details are described in detail in the following detailed description of the present invention. The present invention can be fully understood by those skilled in the art without the description of these detailed parts.

As shown in Figures 1 and 3, an electric wheel hub motor outer rotor includes a rim 1, which is used to place tires on the outer side of the rim 1's circumferential direction, and is used to place a conductive magnet core 2 on the inner side of the rim 1. Permanent magnets 3 are arranged between the cores 2 , and a stator is arranged inside the conductive magnet core 2 .

As shown in FIGS. 1 to 6 , the wheel rim 1 includes an annular body 1 101 of the main body. A second annular body 102 and two annular bodies 102 are respectively provided at the outer circumferential sides of the annular body 1 101 near both ends. The opposite cross-sections are set in an inclined shape, the inclined openings 204 are set outward, and flanges 103 are respectively provided on both ends of the outer circumferential side of the second annular body 102. In this way, the first annular body 101, the annular body The rim 1 formed by the wheel 102 and the flange 103 is used for placing the tire.

As shown in FIGS. 1 to 9 , the first annular body 101 , the second annular body 102 and the flange 103 have an integrated structure, and a fixing block 104 is provided on the inner side wall 108 of the first annular body 101 in the circumferential direction. The fixing block 104 It is also an integral structure with the first ring body 101. The first ring body 101, the second ring body 102, the third ring body 105, and the fixing block 104 are made of non-magnetic conductive materials. The magnetic lines of force of the magnet 3 are concentrated on the side opposite to the stator, which can reduce the magnetic leakage phenomenon of the magnetic steel, which is beneficial to improve the efficiency of electric energy utilization and the efficiency of the motor, which can improve the cruising range of the electric vehicle. The non-magnetic conductive material is set as a thermosetting resin material, such as phenolic resin, epoxy resin or unsaturated polyester resin, and the above-mentioned materials have anti-magnetic properties, which can reduce the effect of magnetic leakage of the magnetic steel; the non-magnetic conductive material is also It can be made of carbon fiber composite material. The carbon fiber composite material is light in weight, high in strength, and can reduce the magnetic leakage of magnetic steel, so the effect is better; the non-magnetic conductive material can also be made of metal alloy materials, such as aluminum-zinc alloy, aluminum-magnesium alloy. , One or more of aluminum-copper alloys, with low density, can reduce weight, can reduce the effect of magnetic leakage of magnetic steel.

In order to solve the technical problem that the magnetic conducting core 2 and the annular body 101 in the prior art are not strong enough to be fixed, and the magnetic conducting core 2 is prone to fall off, the present invention is arranged in the circumferential direction of the inner side wall of the annular body 101-108 A fixed block 104 is provided, and the width of the spacing near the ring body 101 on the fixed block 104 is smaller than the width of the maximum spacing away from the ring body 101. For example, the cross section of the fixed block 104 is set as a trapezoid. The two sides can also be set in arc shape; the fixing block 104 is in the shape of a long strip, and the axial direction of the long strip is parallel to the axial direction of the outer rotor. As shown in Fig. 1 to Fig. 5, the conductive magnet cores 2 are laminated and fixedly arranged on the inner side of the annular body 101. The number of layers and the height of the conductive magnet core 2 are designed according to the requirements of the rotor. The two adjacent conductive magnets up and down The core 2 is laminated and fixed by using the mutual buckle points 205. A groove body 201 is provided at the opposite position of the magnetic core 2 and the ring body 101 to match the fixing block 104. The groove body 201 of the magnetic conductive core 2 is arranged in the ring On the opposite side of the inner side wall of 101 108, the groove body 201 is provided with an opening 204 opposite to the annular body 101. The spacing between the openings 204 in the groove body 201 is smaller than the spacing at the largest part of the groove body 201. For example, the groove body The spacing in the 201 gradually increases from the opening 204 to the inside, the cross-section of the cavity is a trapezoid, and the cross-section of the fixing block 104 is a trapezoid, so that the cross-section of the groove body 201 is matched with the cross-section of the fixing block 104, The long fixed block 104 can be inserted into the groove body 201 of the conductive magnetic core 2 which is formed by stacking several pieces of the conductive magnetic core 2 from the axial direction. Since the distance between the openings 204 in the groove body 201 is relatively small, so , when the rotor rotates around the axis, the fixed block 104 will not fall off from the groove body 201 , the fixed block 104 can play the role of fixing the magnetic core 2 and prevent the magnetic core 2 from falling off. In order to further achieve the effect of fixing, anaerobic glue can also be applied between the conducting magnet core 2 and the annular body 101 before the fixing block 104 is inserted into the conducting magnet core 2 to further play a fixing role. In order to facilitate the insertion of the conductive core 2 into the groove body 201, the opposite opening 204 of the groove body 201 of the conductive magnetic core 2 is set in an arc shape, and the connection between the annular body 101 and the fixing block 104 is also set in an arc shape.

As shown in FIG. 1, FIG. 3, and FIG. 6, a buckle point 205 is formed on the conductive core 2 by punching. The buckle point 205 can be set in a circular shape, or can be set in a rectangle or a square. 2 is formed with depressions and protrusions, and the depressions and protrusions between the adjacent upper and lower conductive cores 2 are in interference fit with each other, and the two adjacent conductive cores 2 are pressed against each other by a pressing device to achieve the purpose of self-buckling. , in this way, the magnet-conducting cores 2 are fixed more firmly to form a column-shaped magnet-conducting core 2 . The buckle point 205 of the conductive core 2 on the bottom layer needs to be set in the shape of a through hole, so as to match the protrusion of the buckle point 205 of the conductive core 2 on the upper layer, and at the same time, the bottom layer of the conductive magnet can be The core 2 also remains flat and does not bulge outwards.

As shown in FIG. 1 , FIG. 3 , and FIG. 6 , the two sides of the conductive core 2 take the central axis 206 as the axis of symmetry, and are arranged in an inclined shape. In this way, when two adjacent conductive cores 2 are fixed on the fixing block 104 After being installed, a gap is formed between the sides of the adjacent conductive magnet cores 2, the gap is a columnar cavity, and a columnar permanent magnet 3 can be arranged in the gap. The lateral projections 207 are arranged on both sides of the end face of the conductive core 2 away from the opening 204 of the slot body 201, which can reduce the cogging torque, improve the saliency of the motor, and at the same time have the effect of limiting the installation of the magnet, which can determine the permanent magnet 3 position.

As shown in FIGS. 4 to 9 , a third annular body 105 is provided at one end of the inner circumferential direction of the annular body 1 101 . One end face is set as a plane, and the plane is opposite to the fixed block 104, which is convenient for the installation of the conductive core 2 and the permanent magnet 3; when installing, after the rim 1 is placed horizontally, an end face of the annular body 3 105 also presents a horizontal state , as long as the magnetic conductive core 2 is inserted into the fixing block 104 from top to bottom, the annular body 3 105 can play the role of positioning the magnetic conductive core 2, so that the conductive magnetic core 2 is arranged neatly, and it is also convenient to apply anaerobic glue , to achieve a further fixed effect. The present invention can improve the processing speed of the outer rotor and improve the product quality of the outer rotor by arranging the third annular body 105 . The shape of the cross-section of the third ring body 105 can be a rectangle, a square, a trapezoid, or a triangle, and can be changed as required. The thickness between the inner side wall 3 106 and the outer side wall 107 of the annular body 3 105, that is, the width of one end face being a plane, is smaller than the thickness between the inner side wall 202 and the outer side wall 203 of the conductive core 2, so that it can be When the outer rotor rotates, the annular body 3 105 is prevented from colliding with the stator iron core, which affects the rotation of the outer rotor and affects the quality of the product.

As shown in Fig. 1, Fig. 3 and Fig. 5, a fixing block 104 is arranged in the circumferential direction of the inner side wall 108 of the annular body 1 101, and the radians between the adjacent fixing blocks 104 on the annular body 1 101 are equal, That is, the adjacent fixed blocks 104 are arranged at equal intervals, so that the permeable cores 2 can be evenly arranged in the circumferential direction, and the permanent magnets 3 between the permeable cores 2 can also be arranged uniformly, so as to improve the quality of the product.

As shown in FIG. 1 and FIG. 9 , between the third annular body 105 and the second annular body 102 , an inclined through hole 109 is provided for installing the valve.

As shown in FIG. 1 , FIG. 3 , FIG. 5 , FIG. 7 , and FIG. 9 , grooves 110 are provided on both end sides of the second annular body 102 , which can reduce the overall weight of the rim 1 . Reinforcing ribs 111 are arranged between the grooves 110 , so that the connection strength between the first annular body 101 and the third annular body 105 can be improved while reducing the overall weight of the rim 1 . A fixing hole 112 is provided on the reinforcing rib 111 for fixing the motor end cover, and the motor end cover can be fixedly connected with the rim 1 through screws, which has the function of protection and dust prevention.

The logarithm of the outer rotor is usually 40 poles, 46 poles, 48 poles, 56 poles, etc., which are set according to the needs of the in-wheel motor. The diameter of the stator and the stacking thickness of the conductive core 2 are set according to the needs of the motor.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. For those of ordinary skill in the art, several modifications and improvements can also be made without departing from the present invention. It should be regarded as belonging to the protection scope of the present invention.

Claims (10)

1. An outer rotor of an electric wheel hub motor, comprising a rim (1), a magnetic core (2) and a permanent magnet (3), wherein the rim (1) comprises an annular body one (101). Two annular bodies (102) are respectively provided on the circumferential outer side of the first annular body (101) near both ends, and flanges ( 103), which is characterized in that: the first ring body (101), the second ring body (102) and the flange (103) are integral structures, and the inner wall one (108) of the ring body one (101) is in the circumferential direction A fixing block (104) is provided, the fixing block (104) and the annular body 1 (101) are integrally formed, and the spacing width of the fixing block (104) near the annular body 1 (101) is smaller than that away from the annular body 1 (101). 101) The width of the maximum distance between the parts, the conductive magnetic core (2) is fixedly arranged on the inner side of the annular body 1 (101) after being stacked, and the conductive magnetic core (2) is opposite to the annular body 1 (101). There is a groove body (201) matched with the fixing block (104), the fixing block (104) is arranged in the groove body (201), and a gap is set between the adjacent magnetic conducting cores (2). A columnar permanent magnet (3) is arranged in the gap. 2. An electric wheel hub motor outer rotor according to claim 1, characterized in that: an annular body three (105) is provided at one end of the annular body one (101) in the inner circumferential direction, and the annular body three (105) (105) is an integral structure with the ring body one (101), and the thickness between the inner side wall (106) and the outer side wall one (107) of the ring body three (105) is smaller than that of the inner side wall of the conductive core (2). Thickness between two (202) and outer side wall two (203). 3. An electric wheel hub motor outer rotor according to claim 1 or 2, characterized in that: the fixing block (104) is elongated, and the axis direction of the elongated shape is parallel to the axis direction of the outer rotor . 4. An electric wheel hub motor outer rotor according to claim 3, characterized in that: the radians between the adjacent fixing blocks (104) of the inner side wall one (108) of the annular body one (101) are equal. 5 . The outer rotor of an electric wheel hub motor according to claim 4 , wherein the groove body ( 201 ) of the conductive magnet core ( 2 ) is arranged on the inner side wall ( 1 ( 101 ) of the annular body ( 101 ). 6 . 108) On the opposite side, the groove body (201) is provided with an opening (204) opposite to the annular body (101), and the spacing between the openings (204) in the groove body (201) is smaller than that of the groove body (201). ) at the maximum distance inside, and the opening (204) of the slot body (201) of the conductive magnet core (2) is set in an arc shape at the opposite position. 6 . The outer rotor of an electric wheel hub motor according to claim 5 , characterized in that buckling points ( 205 ) are arranged on the conductive cores ( 2 ), and between the upper and lower adjacent conductive cores ( 2 ). 7 . The snap points (205) are interference fit with each other. 7 . The outer rotor of an electric wheel hub motor according to claim 6 , wherein the two sides of the conductive magnet core ( 2 ) take the central axis ( 206 ) as the axis of symmetry, and are arranged in an inclined shape, 8 . Lateral projections (207) are provided on both sides of the end face of the side of the conductive core (2) away from the opening (204) of the slot body (201). 8 . The outer rotor of an electric wheel hub motor according to claim 3 , wherein the first annular body ( 101 ), the second annular body ( 102 ), the third annular body ( 105 ), the fixing block ( 104 ) ) is set as an integrated structure composed of non-magnetic conductive materials. 9. An electric wheel hub motor outer rotor according to claim 3, characterized in that the cross-sections of the two annular bodies (102) opposite to each other are set to be inclined, and the third annular body (105) and the ring The second shape body (102) is provided with an inclined through hole (109) penetrating through each other. 10 . The outer rotor of an electric wheel hub motor according to claim 9 , wherein grooves ( 110 ) are provided on both sides of the second annular body ( 102 ), and grooves ( 110 ) are provided between the grooves ( 110 ). 11 . There are reinforcing ribs (111), and fixing holes (112) are arranged on the reinforcing ribs (111).

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