Electrically driven motor and hub rotor assembly thereof

Abstract

The application discloses an electric drive motor and a hub rotor assembly thereof, and belongs to the technical field of electric drive motors. The hub rotor assembly comprises a hub, a shaft, magnetic steels and a double-row magnetic steel holder. The double-row magnetic steel holder is of a split structure and comprises two magnetic steel holder monomers which are the same in structure and are mirror-symmetric. A plurality of magnetic steel positioning grooves are formed in the inner sides of the two magnetic steel holder monomers. At least one magnetic steel is arranged between each of the magnetic steel positioning grooves corresponding to the two magnetic steel holder monomers. The magnetic steels are tightly matched with the magnetic steel positioning grooves, and an adhesive gap is reserved between the two adjacent magnetic steels. A plurality of circumferential positioning grooves for axially mounting the double-row magnetic steel holder are uniformly distributed on the inner wall of the hub. The magnetic steels arranged on the double-row magnetic steel holder are adhered to the inner wall of the hub. The electric drive motor comprises the hub rotor assembly. The magnetic steels are not adhered piece by piece, the working efficiency is improved, the labor cost is reduced, and the adverse faults, such as the abnormal sound caused by the broken magnetic steels falling into the cylinder, are avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric drive motor, and particularly relates to a permanent magnet synchronous electric drive motor and a hub rotor assembly for the electric drive motor. BACKGROUND

[0002] At present, the magnetic field of the permanent magnet synchronous electric drive motor is generated by the permanent magnet-N / S pole magnetic steel. Figure 1 And Figure 2 As shown in the existing electric drive motor hub rotor assembly 1, the permanent magnet-N / S magnetic steel 13, 14 is regularly adhered and fixed on the inner wall of the hub 11 to form an outer rotor drive motor. The N / S magnetic steel 13, 14 of the drive motor is adhered to the annular positioning step groove on the inner wall of the hub 11 by manual piece by piece after being coated with epoxy resin glue. The magnetic steel adhering process is complex and difficult to operate, and the magnetic poles are easily not adhered in place or confused. It is time-consuming and laborious, which seriously affects the production efficiency.

[0003] The permanent magnet synchronous electric drive motor adopts a fully enclosed structure, which is simple in structure, small in size and widely used in direct drive of vehicles. At present, customers often encounter problems of abnormal noise caused by the broken or fallen magnetic steel of the motor and the stator sweep. SUMMARY

[0004] To overcome the above-mentioned deficiencies in the prior art, the first problem solved by the present application is to provide a hub rotor assembly for an electric drive motor, which does not need to adhere the magnetic steel piece by piece, improves the work efficiency and reduces the labor cost; and can effectively avoid the sweep abnormal noise caused by the broken or fallen magnetic steel.

[0005] As the same technical concept, another technical problem solved by the present application is to provide an electric drive motor installed with the above-mentioned hub rotor assembly.

[0006] The technical scheme adopted by the present application to solve the above-mentioned first technical problem is to provide a hub rotor assembly for an electric drive motor, which comprises a hub, a shaft penetrating the center of the hub and a magnetic steel arranged on the inner wall of the hub, and further comprises a double-row magnetic steel holder.

[0007] The double-row magnetic steel holder is of a split structure, comprising two magnetic steel holder monomers which are the same in structure and mirror-symmetric. The inner side of each of the two magnetic steel holder monomers is provided with a plurality of magnetic steel positioning grooves, and at least one magnetic steel is arranged between each of the magnetic steel positioning grooves corresponding to the two magnetic steel holder monomers. The magnetic steel is tightly matched with the magnetic steel positioning groove, and an adhesive gap is reserved between the adjacent two magnetic steels.

[0008] The inner wall of the hub is uniformly provided with a plurality of circumferential positioning grooves extending in the axial direction, and each double-row magnetic steel holder is installed in two circumferential positioning grooves; the magnetic steel provided on the double-row magnetic steel holder is bonded to the inner wall of the hub.

[0009] Further, the bonding surface of the magnetic steel is a circular arc surface, which is matched with the inner wall of the hub, and the magnetic steel is positioned by the circular arc surface and the hub in the radial direction.

[0010] Further, the inner wall of the hub is provided with a magnetic steel axial limiting stepped groove on the upper and lower sides.

[0011] Further, the length W of each magnetic steel positioning groove is greater than an integer multiple of the height h of the magnetic steel, and the total length L of the double-row magnetic steel holder is less than or equal to the depth H of the hub.

[0012] Further, the inner side of each magnetic steel holder is provided with a segmented groove stopper, and the adjacent two magnetic steel positioning grooves are separated by the segmented groove stopper.

[0013] Further, the magnetic steel provided on each double-row magnetic steel holder is a same-polarity magnetic steel, and the magnetic steel provided on the adjacent two double-row magnetic steel holders is a different-polarity magnetic steel.

[0014] Further, the hub is a whole hub or a split hub.

[0015] Further, the double-row magnetic steel holder is made of a non-magnetic material.

[0016] Further, the non-magnetic material is an aluminum alloy material or a plastic material.

[0017] To solve the above-mentioned second technical problem, the technical solution adopted by the present application is to provide an electric drive motor, which includes the above-mentioned hub rotor assembly for the electric drive motor.

[0018] After adopting the above-mentioned technical solution, the beneficial effects of the present application are:

[0019] The double-row magnetic steel holder is a split structure, comprising two magnetic steel holder monomers which are the same in structure and mirror-symmetric, the two magnetic steel holder monomers are connected into a whole through the installation of magnetic steel, and are installed into the inner wall of the wheel hub in a row after being coated with epoxy resin glue; that is, magnetic steels with the same polarity are first fastened and installed in the magnetic steel positioning groove of the double-row magnetic steel holder, an adhesive gap is reserved between the two adjacent magnetic steels, the epoxy resin glue is added in the adhesive gap to realize the fixed connection between the magnetic steels; and after the double-row magnetic steel holder and the magnetic steel are coated with epoxy resin glue on the adhering surface with the inner wall of the wheel hub, the double-row magnetic steel holder with the magnetic steels installed is installed into the circumferential positioning groove in the inner wall of the wheel hub. From the production process point of view, the adhesion of the magnetic steels is avoided, the work efficiency is greatly improved, the labor cost is reduced, and the magnetic steels can effectively avoid the adverse faults such as the sweeping cavity abnormal noise caused by the broken falling under the fastening of the double-row magnetic steel holder.

[0020] The patent will be described in detail below in combination with the drawings and specific embodiments, but not as a limitation on the patent. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the isometric view of the existing electric drive motor wheel hub rotor assembly;

[0022] Figure 2 is the sectional view of the existing electric drive motor wheel hub rotor assembly;

[0023] Figure 3 is the isometric view of the split electric drive motor wheel hub rotor assembly of the application;

[0024] Figure 4 is the sectional view of the split electric drive motor wheel hub rotor assembly of the application;

[0025] Figure 5 is Figure 3 is the enlarged view of A in figure;

[0026] Figure 6 is the front view of the integral electric drive motor wheel hub of the application;

[0027] Figure 7 is the sectional view of the integral electric drive motor wheel hub of the application;

[0028] Figure 8 is the front view of the split electric drive motor wheel hub of the application;

[0029] Figure 9 is the sectional view of the split electric drive motor wheel hub of the application;

[0030] Figure 10 is the assembly view of the first double-row magnetic steel holder and magnetic steel of the electric drive motor of the application;

[0031] Figure 11 isFigure 10 is a sectional view of the first double-row magnetic steel holder;

[0032] Figure 12 is a sectional view of the first double-row magnetic steel holder; Figure 10

[0033] Figure 13 is a sectional view of the second double-row magnetic steel holder of the electric drive motor of the present application;

[0034] In the figure: 1 - wheel hub rotor assembly, 11 - wheel hub, 110 - circumferential positioning groove, 111 - magnetic steel axial limiting stepped groove, 12 - shaft, 13 - N-pole magnetic steel, 131 - circular arc surface, 14 - S-pole magnetic steel, 15 - double-row magnetic steel holder, 150 - magnetic steel holder unit, 151 - magnetic steel positioning groove, 152 - segmented groove stopper, 153 - adhesive gap, 16 - epoxy resin adhesive. DETAILED DESCRIPTION

[0035] The present application will be further described in detail in combination with the accompanying drawings and examples.

[0036] Example 1

[0037] As shown in the figure, the wheel hub rotor assembly 1 of the present application comprises a wheel hub 11, a shaft 12 penetrating the center of the wheel hub, magnetic steels arranged on the inner wall of the wheel hub 11, and a double-row magnetic steel holder 15 and an epoxy resin adhesive 16. Figures 3 to 5 Among them: the wheel hub 11 comprises a cylindrical shell and an end cover fixedly installed with the shaft 12; as shown in the figure, when the wheel hub 11 is a monolithic wheel hub, the cylindrical shell and the end cover are one component and are integrally processed and formed; as shown in the figure, when the wheel hub 11 is a split wheel hub, the cylindrical shell and the end cover are two components and are fixedly connected through bolts. Whether it is a monolithic wheel hub or a split wheel hub, it is applicable to the present application.

[0038] Figure 6 Figure 7 Figure 8 Figure 9

[0039] ​​​​​​The inner wall of the hub 11 is evenly distributed with multiple axially extending circumferential positioning grooves 110. These circumferential positioning grooves 110 are used for axially mounting the double-row magnet retainer 15. The circumferential positioning grooves 110 can be obtained by machining or by precision casting. The double-row magnet retainer 15 is a split structure, including two identical and mirror-symmetrical magnet retainer units 150. The inner sides of the two magnet retainer units 150 are provided with multiple magnet positioning grooves 151. The inner side of the magnet retainer unit 150 is provided with segmented groove stops 152, and adjacent magnet positioning grooves 151 are separated by segmented groove stops 152. At least one magnet is provided between each corresponding magnet positioning groove 151 of the two magnet retainer units 150. The magnet fits tightly with the magnet positioning groove 151, and an adhesive gap 153 is reserved between adjacent magnets. This adhesive gap 153 serves as redundant space for applying epoxy resin adhesive. The inner wall of the hub 11 is also provided with a magnetic steel axial limiting stepped groove 111. When the electric drive motor is working, the magnetic steel is blocked by the magnetic steel axial limiting stepped groove 111 to prevent axial movement.

[0040] The magnets on each double-row magnet holder 15 are of the same polarity (N-pole magnet 13 or S-pole magnet 14), and the magnets on two adjacent double-row magnet holders 15 are magnets of opposite polarity (the magnet on one double-row magnet holder 15 is an N-pole magnet 13, and the magnet on the adjacent double-row magnet holder 15 is an S-pole magnet 14).

[0041] The length W of each magnet positioning groove 151 is slightly greater than an integer multiple of the height h of the magnet (to ensure that the bonding gap 153 is reserved), and the total length L of the double-row magnet retainer 15 is less than or equal to the depth H of the hub 11.

[0042] like Figures 10 to 12 As shown, in this embodiment, each of the two magnet cage units 150 has three magnet positioning grooves 151 on its inner side. The length of each magnet positioning groove 151 is W, which is slightly greater than twice the height of the magnet h. Each magnet positioning groove 151 of the double-row magnet cage 15 can accommodate two magnets. The magnets and the two magnet cage units 150 are tightly fitted together.

[0043] Specific installation as follows: install three groups of same polarity 6 magnetic steel into the magnetic steel positioning groove 151 of double row magnetic steel holder 15, the excess part of each magnetic steel positioning groove 151 can be used as the redundant space of epoxy resin glue, that is, a bonding gap 153 is reserved between the adjacent two magnetic steels in each magnetic steel positioning groove 151, the adjacent two magnetic steels in the adjacent two magnetic steel positioning grooves 151 are spaced by the segmented groove block 152, the spacing gap is equivalent to the reserved bonding gap 153, and the epoxy resin glue is added in the bonding gap 153 to realize the fixed connection between the magnetic steels. At this time, the double row magnetic steel holder 15 can be kept as a whole structure. The surface of the magnetic steel adhered to the inner wall of the hub 11 is the bonding surface, and the bonding surface is a circular arc surface 131 matched with the inner wall of the hub 11. The circular arc surface of the magnetic steel is an important matching surface adhered to the inner wall of the hub 11, and the magnetic steel is positioned and adhered to the hub 11 in the radial direction through the circular arc surface 131. After the double row magnetic steel holder 15 and the circular arc surface 131 of the magnetic steel are coated with epoxy resin glue, the double row magnetic steel holder 15 with the magnetic steel installed is installed into the circumferential positioning groove 151 of the inner wall of the hub 11; the magnetic steel is prevented from being damaged and falling off after the epoxy resin glue 16 fails for a long time, and further, the adverse faults such as the sweeping bore abnormal noise caused by the broken and falling magnetic steels are avoided. The plurality of double row magnetic steel holders 15 are regularly and uniformly distributed on the inner wall of the hub 11; the magnetic steels are prevented from being bonded in pieces, the working efficiency is greatly improved, and the labor cost is reduced.

[0044] Wherein:

[0045] The double row magnetic steel holder 15 is made of non-magnetic material; the non-magnetic material is aluminum alloy material or plastic material.

[0046] Embodiment two:

[0047] Embodiment two and embodiment one have the same concept and basically the same structure, and the difference lies in that the number of magnetic steel positioning grooves 151 in the double row magnetic steel holder 15 is different.

[0048] As shown in Figure 13 , the total length L of the double row magnetic steel holder 15 is still less than or equal to the depth H of the hub 11. The opposite inner sides of the two magnetic steel holder monomers 150 are each provided with six magnetic steel positioning grooves 151, and the length of each magnetic steel positioning groove 151 is W', which is slightly greater than the height h of a single magnetic steel, that is, only one magnetic steel can be installed in each magnetic steel positioning groove 151 of the double row magnetic steel holder 15, and at this time, the adjacent two magnetic steels are mainly spaced by the segmented groove block 152. The specific installation process is consistent with the installation process described in embodiment one, and will not be repeated here.

[0049] The hub rotor assembly described in Example 1 and Example 2 above is installed in an electric drive motor. Other components of the electric drive motor are known in the art and are not modified and are not described in detail herein.

[0050] The above description is that of the preferred embodiments of the present application only, and is not intended to limit the present application. Any modification, equivalent arrangement, improvement and the like of the electric drive motor and its hub rotor assembly within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A wheel hub rotor assembly for electrically driving an electric motor, said wheel hub rotor assembly comprising a wheel hub, a shaft passing through the center of said wheel hub, and a magnet set disposed on the inner wall of said wheel hub, characterized in that, Also include double row magnetic steel holder; The double row magnetic steel holder is of split structure, comprising two magnetic steel holder units which are identical in structure and mirror-symmetric, and a plurality of magnetic steel positioning grooves are formed in the inner side of each of the two magnetic steel holder units, and at least one magnetic steel is arranged between each of the corresponding magnetic steel positioning grooves of the two magnetic steel holder units, the magnetic steel is tightly matched with the magnetic steel positioning groove, and an adhesive gap is reserved between the two adjacent magnetic steels; The inner wall of the hub is uniformly provided with a plurality of circumferential positioning grooves extending in the axial direction, and the two magnetic steel holder units of each double row magnetic steel holder are respectively arranged in the two circumferential positioning grooves; the magnetic steels arranged on the double row magnetic steel holder are adhered to the inner wall of the hub; The magnetic steels of the same polarity are first tightly installed in the magnetic steel positioning grooves of the double row magnetic steel holder, epoxy resin glue is added in the adhesive gap between the two adjacent magnetic steels, and then the double row magnetic steel holder with the magnetic steels installed is installed into the circumferential positioning grooves of the inner wall of the hub after the epoxy resin glue is coated on the fitting surface of the double row magnetic steel holder, the magnetic steels and the inner wall of the hub.

2. The hub-rotor assembly for an electrically driven electric machine of claim 1, wherein, The adhesive surface of the magnetic steel is a circular arc surface, which is matched with the inner wall of the hub, and the magnetic steel is positioned by the radial fitting of the circular arc surface and the hub.

3. The hub-rotor assembly for electrically driving an electric machine of claim 1, wherein, The inner wall of the hub is provided with a magnetic steel axial limiting stepped groove.

4. The hub-rotor assembly for electrically driving an electric machine of claim 1, wherein, The length W of each magnetic steel positioning groove is greater than the integer multiple of the height h of the magnetic steel, and the total length L of the double row magnetic steel holder is less than or equal to the depth H of the hub.

5. The hub-rotor assembly for electrically driving an electric machine of claim 4, wherein, The inner side of each magnetic steel holder unit is provided with a segmented groove stopper, and the two adjacent magnetic steel positioning grooves are separated by the segmented groove stopper.

6. The hub-rotor assembly for electrically driving an electric machine of claim 1, wherein, The magnetic steels arranged on each double row magnetic steel holder are magnetic steels of the same polarity, and the magnetic steels arranged on the two adjacent double row magnetic steel holders are magnetic steels of different polarities.

7. The hub-rotor assembly for electrically driving an electric machine of claim 1, wherein, The hub is a whole hub or a split hub.

8. The hub-rotor assembly for electrically driving an electric machine of claim 1, wherein, The double row magnetic steel holder is made of non-magnetic material.

9. The hub-rotor assembly for electrically driving an electric machine of claim 8, wherein, The non-magnetic material is an aluminum alloy material or a plastic material.

10. An electric drive motor characterized by The electric drive motor comprises the hub rotor assembly for the electric drive motor according to any one of claims 1-9.

Images