CN212353450U - Casting wheel hub for electric vehicle - Google Patents
Casting wheel hub for electric vehicle Download PDFInfo
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- CN212353450U CN212353450U CN202020384642.7U CN202020384642U CN212353450U CN 212353450 U CN212353450 U CN 212353450U CN 202020384642 U CN202020384642 U CN 202020384642U CN 212353450 U CN212353450 U CN 212353450U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention relates to a casting hub for an electric vehicle, which comprises a magnetic conductive ring and a rim, wherein the magnetic conductive ring is arranged inside the rim, the rim is a metal casting part, the rim comprises a tire mounting structure surface and a tire groove, a plurality of bosses which are distributed circumferentially and bulge outwards are arranged on the outer side of the circumferential surface of the bottom of the tire groove, the bosses extend along the axial direction and are intersected with the inclined side surface of the tire groove, and a valve core hole is arranged on the inclined side surface of the tire groove. The invention has the beneficial effects that: the casting hub for the electric vehicle fully utilizes the space of the tire groove, the boss is arranged at the bottom of the tire groove and used for placing the fixing screw hole, and the structure limits and enlarges the inner diameter of the magnetic conduction ring, so that the force arm of the electromagnetic force of the motor is prolonged, the output torque of the hub motor is greatly improved, the motor efficiency and the output power are improved, meanwhile, the boss is distributed in the structure, the raw material of the casting is saved, the weight of the whole machine is reduced, the rotor inertia is reduced, and the response speed of the motor is improved.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a cast hub for an electric vehicle.
Background
Along with the increasing popularization of electric vehicles, another short-distance portable or foldable sliding plate type electric vehicle field is developed, the electric vehicles pursue lightness and smallness, the storage space is small, and sufficient output performance is achieved, so that the problem that a short-distance single person in a city goes out and has busy traffic is solved.
At present scooter motor and some light sharing series's motor, the majority adopts 6.5 cun of electric motor standard, or the tire between 6 cun ~14 cun of electric bicycle standard, and the motor outline space of matching these child types is general all very little, and radial dimension is little, and axial dimension is also little, and this just leads to motor output torque little and rated operating temperature is high, very easily appears motor power not enough or long-time overload operation motor that burns.
In the prior art, a low-power hub motor applied to a portable electric vehicle or a short-distance scooter mostly adopts a structure that a low-carbon steel magnetic conduction ring is internally embedded in a die-casting hub made of aluminum alloy or magnesium alloy, and the like, and in order to ensure that a magnetic circuit of the motor does not leak magnetic flux, the thickness of the magnetic conduction ring must meet functional requirements, and an end cover fixing threaded hole must be outside the inner diameter of the magnetic conduction ring of the motor, generally, the inner diameter space of the magnetic conduction ring of the motor is limited because the magnetic conduction ring is larger than the maximum outer diameter of the magnetic conduction ring, and the tire mounting size of the low-power motor is limited, namely the length of an electromagnetic force arm of the motor is limited, and how to improve the output torque and the power density of the motor in the limited tire mounting space is.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a casting hub externally provided with a threaded fixing column. According to the cast hub for the electric vehicle, the motor end cover fixing threaded hole is moved outwards, the internal space of the motor is improved, the internal diameter of the hub magnetic conduction ring is increased, the motor can obtain a longer electromagnetic force arm, the output torque of the motor is effectively improved, meanwhile, a stator with a larger external diameter can be designed in a larger space, the groove sectional area of the stator can be increased, the sectional area of a single-strand wire wound on the inner stator is larger, the current overload capacity of the motor is stronger, and the power density and the working efficiency of the motor are obviously improved. In addition, the boss type threaded column structure ensures that the motor is optimally designed in a light weight manner on the premise of meeting the assembly requirement of the motor, so that raw materials are saved, the rotor inertia of the motor is reduced, the response speed of the motor is increased, and the riding comfort of the whole vehicle is optimized.
In order to achieve the purpose, the invention provides a cast hub for an electric vehicle, which adopts the technical scheme that:
the utility model provides a casting wheel hub for electric motor car, includes magnetic ring and rim, magnetic ring locates inside the rim, the rim is the metal casting spare, the rim is including dress child structural plane and child groove, its characterized in that: the tire groove is characterized in that a plurality of bosses which are distributed circumferentially and protrude outwards are arranged on the outer side of the circumferential surface of the bottom of the tire groove, the bosses extend axially and intersect with the inclined side surface of the tire groove, and the inclined side surface of the tire groove is provided with a valve inside hole. This design, through the rationalization utilization to the child groove space, boss form on the oblique side of child groove forms the screw hole post, move the fixed screw hole of end cover outward, great promotion motor wheel hub's inner space, make motor wheel hub under the prerequisite of the same dress tread size, can obtain bigger magnetic conduction ring internal diameter, the stator external diameter of corresponding motor also follows the increase of same proportion, make motor stator's groove sectional area strengthen, the stator phase line cross-sectional area of motor has been strengthened, the current overload capacity of promotion motor, the electromagnetic force arm of motor has also been prolonged simultaneously, the output torque of motor has been improved greatly, can show the power density and the efficiency that improve the motor.
The invention provides a cast hub for an electric vehicle, which further comprises the following auxiliary technical scheme:
the magnetic conduction ring is a die-casting insert, the magnetic conduction ring is a ring body, and an inner groove or an outer convex positioning, rotation stopping and anti-loosening structure is arranged on the outer circumferential surface of the magnetic conduction ring. The design scheme ensures the binding force between the magnetic conductive ring and the metal casting body made of different materials, and in the process of casting the hub, the groove or the raised structure part leads the outer circumferential surface of the magnetic conductive ring and the rim die-casting body to form axial and radial positioning and loosening in a structure form of local mutual intersection, thereby greatly improving the radial and axial positioning, rotation stopping and looseness preventing functions of the magnetic conductive ring of the hub of the motor.
Wherein, be equipped with the fixed screw hole of side cover in the boss, the screw hole is the blind hole and places along the axial. The design scheme of the boss structure is used for designing the hub in a light weight mode, casting materials are only added at the positions of threaded holes, raw materials are saved, and the weight of the whole machine is reduced.
Wherein the wall thickness of the magnetic conduction ring is 2.0 mm-5.0 mm, and the height of the magnetic conduction ring is 10 mm-70 mm. This design has reduced the magnetic density saturation of wheel hub magnetic ring, reduces the magnetic leakage, promotes the motor performance.
Wherein, the magnetic conduction ring internal diameter is 110mm ~220mm, and this design guarantees that the wheel hub structure can adapt to the tire model of multiple specification to satisfy the demand.
Wherein, one side of the cast hub is provided with an open end face, and the other side is provided with a connected end cover, or both sides are provided with open end faces. This design has improved the flexibility that the motor designed as required, can change the end cover structure according to different customers simultaneously to promote wheel hub's commonality.
Wherein, the inner groove arranged on the outer circumference of the magnetic conduction ring is of an outer spiral groove structure. According to the design scheme, the radial and axial positioning, rotation stopping and looseness preventing effects between the magnetic conduction ring and the outer wheel rim body are better, and the processing technology is simple and convenient.
Compared with the prior art, the invention has the advantages and beneficial effects that:
compared with the traditional hub without the boss tyre groove structure, the cast hub for the electric vehicle provided by the invention has the advantages that on the premise of keeping the same tyre model, the larger internal space of the hub can be obtained, the internal diameter of the magnetic conduction ring is increased, namely the external diameter of the matched stator of the motor is increased in the same ratio, the electromagnetic force arm of the motor is lengthened, and the output torque of the motor is improved. In addition, compare with the wheel hub of traditional no boss structure, the stator external diameter that the motor inner space increases and brings increases, and its result makes the stator design to the structure of bigger groove sectional area, increases stator wire wound single strand sectional area, promotes the electric current overload capacity of motor, can improve power density greatly, practices thrift the stator cost, promotes motor output efficiency
According to the cast hub for the electric vehicle, the inner groove or the outer protrusion type rotation-stopping and anti-loosening structure is arranged on the outer circumferential surface of the magnetic ring, compared with the traditional magnetic ring groove-free outer circumferential surface structure, the groove structure or the outer protrusion structure forms a mutually crossed combined structure with a rim metal body in the high-temperature die casting process of the hub to form effective axial movement-preventing positioning, better gripping force is provided between the magnetic ring and the rim, and the axial and radial positioning and rotation-stopping and loosening functions are correspondingly exerted.
The motor testing equipment is utilized to carry out performance comparison testing on the motor applying the invention, and the motor applying the invention has the advantages of large motor output torque, obvious motor efficiency improvement, stronger current bearing capacity of the motor, obvious reduction of motor temperature rise and obvious improvement of the comprehensive performance of the motor under the same outer contour size.
Compared with the prior art, the casting wheel hub for the electric vehicle has the advantages that the screw fixing structure of the motor is optimized, the screw fixing columns are moved outwards to the tire groove part, the tire groove space is reasonably utilized, the larger motor inner space is obtained, the output torque of the motor is favorably improved, the working efficiency of the motor is improved, the current overload capacity of the motor is improved, the temperature rise of the motor is reduced, and the service life of the motor is prolonged.
Drawings
Fig. 1 is a schematic structural view of a cast hub for an electric vehicle according to the present invention.
Fig. 2 is a sectional view of the structure of the cast hub for the electric vehicle of the present invention.
In the drawings, 1, a hub is cast; 11. a rim; 12. a magnetic conductive ring; 13. a tire groove; 111. the outer side of the circumferential surface of the bottom of the tire groove; 112. mounting a tire structural surface; 113. a boss; 114. a valve core hole; 115. a tire groove inclined side surface; 116. the side cover is fixed with the threaded hole; 117. an open end face; 121. an inner groove.
Detailed Description
The following is a detailed description of the embodiments of the present invention, and the technical solutions of the present invention are further described in detail with reference to the accompanying drawings, and it should be noted that the described embodiments are only intended to facilitate the understanding of the present invention by those skilled in the art, and do not limit the scope of the present invention in any way.
Example 1:
as shown in fig. 1 to 2, the casting hub 1 for the electric vehicle provided in this embodiment includes a magnetic ring 12 and a rim 11, the magnetic ring 12 is disposed inside the rim 11, the rim 11 is a metal casting, the rim 11 includes a tire mounting structure surface 112 and a tire groove 13, an inner diameter of the magnetic ring 12 of the casting hub 1 is 120.5mm to 122.5mm, a thickness of a permanent magnet of an applied hub motor is 2.0mm to 3.5mm, and in this embodiment, an air gap length of the applied hub motor is 0.25mm to 0.5 mm.
Specifically, the outer side 111 of the circumferential surface of the bottom of the tire groove 13 of the casting hub 1 is provided with a plurality of outward-protruding bosses 113 distributed circumferentially, the bosses 113 extend axially and intersect with a tire groove inclined side surface 115, and the tire groove inclined side surface 115 is provided with a valve core hole 114. This design through the rationalization utilization to the child groove space to boss form on the oblique side of child groove forms the screw hole post, moves the fixed screw hole of end cover outward, has promoted the motor inner space, and the extension electromagnetism arm of force improves output torque, and the big space is fit for designing bigger sectional area stator cell type simultaneously, can place more enameled wire windings, has improved the current overload capacity of motor greatly, reduces and burns the motor risk, optimizes motor performance, increase of service life.
The hub motor applied to the cast hub optimizes the tire groove and the internal structure of the hub, on one hand, the internal space of the motor is enlarged to improve the power density of the motor, the motor stator groove with larger sectional area is designed by matching the larger internal space, the single-strand sectional area of the winding of the motor is improved, the temperature is reduced, the safety of the motor is improved, the service life is prolonged, on the other hand, the electromagnetic force arm is lengthened to increase the output torque of the motor, the output characteristic of the motor is comprehensively improved, and the material utilization rate is improved.
As shown in fig. 1 and fig. 2, the magnetic conductive ring 12 is a die-casting insert, the magnetic conductive ring 12 is a circular ring, and an inner groove 121 or an outer protruding anti-rotation and anti-loosening structure is provided on an outer circumferential surface of the magnetic conductive ring 12. In this embodiment, an inner groove 121 is formed on the outer circumferential surface of the magnetic conductive ring 12. By the aid of the design scheme, radial and axial positioning and anti-loosening functions of the magnetic conduction ring 12 of the motor casting hub 1 are greatly improved. In this embodiment, the outer circumferential surface of the magnetic conductive ring 12 is provided with an inner groove rotation stopping and releasing structure.
The boss 113 is provided with a side cover fixing threaded hole 116, and the threaded hole 116 is a blind hole and is arranged along the axial direction. The design scheme of the boss 113 structure is that the casting hub 1 is designed in a light weight mode, casting materials are only added at the position of the side cover fixing threaded hole 116, raw materials are saved, and the weight of the whole machine is reduced.
The wall thickness of the magnetic ring 12 is 2.0 mm-5.0 mm, the height of the magnetic ring 12 is 10 mm-70 mm, preferably the wall thickness of the magnetic ring 12 is 2.5 mm-3.5 mm, the height of the magnetic ring 12 is 23 mm-59 mm, further preferably, in the embodiment, the wall thickness of the magnetic ring 12 is 3.0 mm-3.5 mm, and the height of the magnetic ring 12 is 23 mm-31 mm. The design scheme reduces the magnetic density saturation of the magnetic conductive ring 12 of the cast hub 1, reduces the magnetic leakage and improves the magnetic energy utilization rate of the motor.
The inner diameter of the magnetic ring 12 is 110mm to 220mm, preferably, the inner diameter of the magnetic ring 12 is 120mm to 123mm, and further preferably, in this embodiment, the inner diameter of the magnetic ring 12 is 121mm to 122 mm. This design guarantees that casting wheel hub 1 structure can adapt to the tire model of multiple specification to satisfy the demand.
One side of the cast hub 1 is provided with an open end surface 117, and the other side is provided with a connected end cover, or both sides are provided with open end surfaces 117. In this embodiment, one side of the cast hub 1 has an open end surface 117, and the other side is a conjoined end cover. This design has improved the flexibility that the motor designed as required, can change the end cover structure according to different customers simultaneously to promote the commonality of casting wheel hub 1.
The inner groove 121 arranged on the outer circumference of the magnetic conductive ring is an outer spiral groove structure. According to the design scheme, the radial and axial positioning, rotation stopping and looseness preventing effects between the magnetic conduction ring 12 and the outer rim 11 casting body are better, and the processing technology is simple and convenient.
According to the stator of the hub motor for the electric vehicle, the magnetic circuit is optimized through the tooth groove structure which is reasonable in design, the magnetic density saturation degree of teeth and yoke parts is reduced, the temperature rise of the motor is effectively reduced, the effective area of the tooth groove is increased, the number of copper wire windings is increased, the iron loss and the copper loss of the motor are reduced, the short-time current overload capacity of the motor is remarkably improved, the power density of the motor is increased, and the utilization rate of stator materials is improved.
Example 2:
most of the technical solutions in this embodiment are the same as those in embodiment 1, and this embodiment only details different parts, and the parts of this embodiment that are the same as those in embodiment 1 are not described again. In this embodiment, the inner diameter of the magnetic ring 12 is 130mm to 131.5mm, the wall thickness of the magnetic ring 12 is 2.5mm to 3.5mm, and the height of the magnetic ring 12 is 12mm to 31 mm.
Example 3:
most of the technical solutions in this embodiment are the same as those in embodiment 1, and this embodiment only details different parts, and the parts of this embodiment that are the same as those in embodiment 1 are not described again. In this embodiment, the inner diameter of the magnetic ring 12 is 120.5mm to 121 mm.
The above embodiments are only preferred embodiments of the present invention, which are only used for illustrating the technical solutions of the present invention, and are not meant to limit the patent scope of the present invention, and all modifications or equivalent substitutions that are made to the technical solutions of the present invention by using the contents of the description and the drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the patent protection scope of the present invention.
Although the terms of the cast hub 1 for the electric vehicle, the rim 11, the magnetic conductive ring 12, the tire groove 13, the circumferential outer side 111 of the bottom of the tire groove, the tire mounting structure surface 112, the boss 113, the valve core hole 114, the oblique side surface 115 of the tire groove, the threaded hole 116 for fixing the side cover, the open end surface 117, the inner groove 121, etc., are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (7)
1. The utility model provides a casting wheel hub for electric motor car, includes magnetic ring and rim, magnetic ring locates inside the rim, the rim is the metal casting spare, the rim is including dress child structural plane and child groove, its characterized in that: the tire groove is characterized in that a plurality of bosses which are distributed circumferentially and protrude outwards are arranged on the outer side of the circumferential surface of the bottom of the tire groove, the bosses extend axially and intersect with the inclined side surface of the tire groove, and the inclined side surface of the tire groove is provided with a valve inside hole.
2. The cast hub for electric vehicles according to claim 1, wherein: the magnetic conduction ring is a die-casting insert, the magnetic conduction ring is a circular ring body, and an inner groove or an outer convex positioning, rotation stopping and anti-loosening structure is arranged on the outer circumferential surface of the magnetic conduction ring.
3. The cast hub for electric vehicles according to claim 1, wherein: and a side cover fixing threaded hole is formed in the boss and is a blind hole and is axially arranged.
4. The cast hub for electric vehicles according to claim 2, wherein: the wall thickness of the magnetic conduction ring is 2.0 mm-5.0 mm, and the height of the magnetic conduction ring is 10 mm-70 mm.
5. The cast hub for electric vehicles according to claim 2, wherein: the internal diameter of the magnetic conduction ring is 110 mm-220 mm.
6. The cast hub for electric vehicles according to claim 1, wherein: one side of the cast hub is an open end face, and the other side of the cast hub is a connected end cover, or both sides of the cast hub are open end faces.
7. The cast hub for electric vehicles according to claim 2, wherein: the inner groove arranged on the outer circumferential surface of the magnetic conduction ring is of an outer spiral groove structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020384642.7U CN212353450U (en) | 2020-03-24 | 2020-03-24 | Casting wheel hub for electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020384642.7U CN212353450U (en) | 2020-03-24 | 2020-03-24 | Casting wheel hub for electric vehicle |
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| CN212353450U true CN212353450U (en) | 2021-01-15 |
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| CN202020384642.7U Active CN212353450U (en) | 2020-03-24 | 2020-03-24 | Casting wheel hub for electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111452555A (en) * | 2020-03-24 | 2020-07-28 | 台州市金宇机电有限公司 | Casting wheel hub for electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111452555A (en) * | 2020-03-24 | 2020-07-28 | 台州市金宇机电有限公司 | Casting wheel hub for electric vehicle |
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