CN110254219B - Flange shaft, flange shaft assembly and hub driving system - Google Patents
Flange shaft, flange shaft assembly and hub driving system Download PDFInfo
- Publication number
- CN110254219B CN110254219B CN201810199891.6A CN201810199891A CN110254219B CN 110254219 B CN110254219 B CN 110254219B CN 201810199891 A CN201810199891 A CN 201810199891A CN 110254219 B CN110254219 B CN 110254219B
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- flange
- shaft
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- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims description 13
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims 1
- 239000000314 lubricant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/121—Power-transmission from drive shaft to hub
- B60B35/122—Power-transmission from drive shaft to hub using gearings
- B60B35/125—Power-transmission from drive shaft to hub using gearings of the planetary type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Retarders (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to a flange shaft, a flange shaft assembly and a hub drive system. A flange shaft for a hub drive system for mounting to a wheel of a vehicle and comprising a housing, a planetary transmission, a first bearing and a second bearing, wherein a sun gear of the planetary transmission defines a radially outer raceway of the second bearing, the flange shaft comprising: a flange portion for torsionally-fixedly connecting to a wheel of a vehicle; and a shaft portion comprising a first section and a second section distributed in an axial direction, the first section being located between the flange portion and the second section, wherein the shaft portion is coaxial with the flange portion and an outer diameter of the flange portion is larger than an outer diameter of the shaft portion, an inner ring of a first bearing being coaxially disposable on the second section, wherein the shaft portion further comprises an annular groove disposed on the first section and the groove defining a radially inner raceway of the second bearing.
Description
Technical Field
The invention relates to a flange shaft. More particularly, the present invention relates to a flange shaft for a hub drive system.
Background
The in-wheel motor or in-wheel driving technology integrates power, transmission and braking devices into a wheel hub, so that the structure of a vehicle, particularly an electric vehicle, can be simplified. FIG. 1 shows a schematic cross-sectional view of a hub drive assembly of a vehicle. As shown in fig. 1, the hub drive assembly includes a flange shaft 1, a housing 2, a planetary transmission 3, and an electric motor 4. In addition, the hub drive assembly may also include a brake or the like. During operation, the torque of the electric motor 4 drives the planetary gear 3, and the torque of the sun gear of the planetary gear 3 drives the flange shaft, so that the wheels as well as the vehicle can be driven.
The hub drive assembly further comprises a hub bearing 5 which is fitted over the flange shaft 1 such that the flange shaft 1 is rotatably supported in the housing 2. During running of the vehicle, the weight of the vehicle as well as external loads (e.g. vibration loads, acceleration loads, etc.) are transferred from the wheels to the flange shaft, and all equivalent loads and torques are exerted on the hub bearing 5. In finite element analysis it was found that the deformation of the flange shaft due to the load applied would reach 1mm. This degree of deformation is sufficient to cause lubricant within the hub drive assembly to leak from the seal between the flange shaft and the housing. Lubricant leakage was indeed found in the experiments.
For this reason, there is a need for a flange shaft and hub drive system that increases rigidity and reduces the risk of lubricant leakage.
Disclosure of Invention
It is an object of the present invention to provide a flange shaft and hub drive system that can improve rigidity and reduce deflection. It is a further object of the present invention to provide a flange shaft and hub drive system that reduces the risk of lubricant leakage. It is a further object of the present invention to provide a flange shaft and hub drive system that reduces vibration loads.
One aspect of the present invention provides a flange shaft for a hub drive system for mounting to a wheel of a vehicle and comprising a housing, a planetary transmission, a first bearing and a second bearing, wherein a sun gear of the planetary transmission defines a radially outer race of the second bearing, the flange shaft comprising: a flange portion for torsionally-fixedly connecting to a wheel of a vehicle; and a shaft portion comprising a first section and a second section distributed in an axial direction, the first section being located between the flange portion and the second section, wherein the shaft portion is coaxial with the flange portion and an outer diameter of the flange portion is larger than an outer diameter of the shaft portion, an inner ring of the first bearing being coaxially disposable on the second section, wherein the shaft portion further comprises an annular groove disposed on the first section, and the groove defines a radially inner raceway of the second bearing.
According to an embodiment of the invention, the outer diameter of the first section is larger than the outer diameter of the second section.
According to an embodiment of the invention, the axial width of the groove corresponds to the axial width of the cage of the second bearing.
According to an embodiment of the invention, the shaft portion further comprises a third section, wherein the second section is located between the first section and the third section, and an outer diameter of the third section is smaller than an outer diameter of the second section.
Another aspect of the present invention provides a flange shaft assembly for a hub drive system for mounting to a wheel of a vehicle and including a housing, a planetary transmission and a first bearing, the flange shaft assembly comprising: a flange shaft, comprising: a flange portion for torsionally-fixedly connecting to a wheel of a vehicle; and a shaft portion including a first section and a second section distributed in an axial direction, the first section being located between the flange portion and the second section, wherein the shaft portion is coaxial with the flange portion and an outer diameter of the flange portion is larger than an outer diameter of the shaft portion, wherein an inner ring of the first bearing can be coaxially disposed on the second section, the shaft portion further including an annular groove disposed on the first section; and a second bearing comprising rolling elements and a cage, wherein the cage is disposed in a groove, wherein the groove defines a radially inner raceway of the second bearing, and a sun gear of the planetary transmission defines a radially outer raceway of the second bearing.
According to an embodiment of the invention, the outer diameter of the first section is larger than the outer diameter of the second section.
According to an embodiment of the invention, the axial width of the groove corresponds to the axial width of the cage of the second bearing.
According to an embodiment of the invention, the cage comprises a slit defining a first circumferential end face and a second circumferential end face of the cage, and the slit extends in the axial direction from the first axial end face to the second axial end face of the cage and in the radial direction from the radially inner surface to the radially outer surface of the cage.
According to an embodiment of the invention, the cage comprises a single slit, and the cage can be elastically pulled away from the slit such that the spacing between the first circumferential end surface and the second circumferential end surface is enlarged to such an extent that the groove of the flange shaft can be accommodated.
According to an embodiment of the invention, the first circumferential end face and the second circumferential end face define a meandering line shape, respectively, corresponding to each other, seen from the first axial end face or the second axial end face of the holder.
According to an embodiment of the invention, the shaft portion further comprises a third section, wherein the second section is located between the first section and the third section, and an outer diameter of the third section is smaller than an outer diameter of the second section.
Another aspect of the present invention provides a hub drive system for a vehicle, comprising: a housing; a planetary transmission including a sun gear; a flange shaft, comprising: a flange portion torsionally connected to a wheel of a vehicle; and a shaft portion comprising a first section and a second section distributed in an axial direction, the first section being located between the flange portion and the second section, wherein the shaft portion is coaxial with the flange portion and an outer diameter of the flange portion is larger than an outer diameter of the shaft portion, wherein the shaft portion further comprises an annular groove provided on the first section; a first bearing, wherein an inner race of the first bearing is coaxially disposed on the second section and an outer race of the first bearing is connected to the housing; and a second bearing comprising rolling elements and a cage, wherein the cage is disposed in a groove, wherein the groove defines a radially inner raceway of the second bearing, and a sun gear of the planetary transmission defines a radially outer raceway of the second bearing.
According to an embodiment of the invention, the outer diameter of the first section is larger than the outer diameter of the second section.
According to an embodiment of the invention, the axial width of the groove corresponds to the axial width of the cage of the second bearing.
According to an embodiment of the invention, the cage comprises a slit defining a first circumferential end face and a second circumferential end face of the cage, and the slit extends in the axial direction from the first axial end face to the second axial end face of the cage and in the radial direction from the radially inner surface to the radially outer surface of the cage.
According to an embodiment of the invention, the cage comprises a single slit, and the cage can be elastically pulled away from the slit such that the spacing between the first circumferential end surface and the second circumferential end surface is enlarged to such an extent that the groove of the flange shaft can be accommodated.
According to an embodiment of the invention, the first circumferential end face and the second circumferential end face define a meandering line shape, respectively, corresponding to each other, seen from the first axial end face or the second axial end face of the holder.
According to an embodiment of the invention, the shaft portion further comprises a third section, wherein the second section is located between the first section and the third section, and an outer diameter of the third section is smaller than an outer diameter of the second section.
Drawings
FIG. 1 is a schematic cross-sectional view of a hub drive system of a vehicle.
FIG. 2 is a schematic cross-sectional view of a hub drive system according to an embodiment of the present invention.
Fig. 3 is an enlarged partial schematic view of the flange shaft of fig. 2.
Fig. 4 is a schematic view of a second bearing according to an embodiment of the invention.
Detailed Description
Hereinafter, embodiments of the present invention are described with reference to the drawings. The following detailed description and drawings are provided to illustrate the principles of the invention and are not limited to the preferred embodiments described, the scope of which is defined by the claims. The invention will now be described in detail with reference to exemplary embodiments, some examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same reference numerals in different drawings represent the same or similar elements, unless otherwise indicated. The schemes described in the following exemplary embodiments do not represent all schemes of the present invention. Rather, these are merely examples of systems and methods of various aspects of the present invention that are set forth in the following claims.
The hub driving system according to the embodiment of the invention can be applied to a vehicle, particularly an electric vehicle using an electric motor as a driving source.
FIG. 2 is a schematic cross-sectional view of a hub drive system according to an embodiment of the present invention. As shown in fig. 2, the hub drive system may include a flange shaft 10, a housing 20, a planetary transmission 30, an electric motor 40, a first bearing 50, and a second bearing 60. In an exemplary embodiment, the hub drive system may be located in an interior space of a wheel of the vehicle, such as a space enclosed by the hub and the rim. The housing 20 is used to form one or more sealed cavities to house the flange shaft 10, the planetary transmission 30, the motor 40, and the like. One cavity of the housing 20 is filled with a lubricant to lubricate and cool the various components of the planetary transmission 30, thereby improving the performance and efficiency of the planetary transmission 30. The hub drive system may also include a brake or the like.
According to an embodiment of the present invention, the flange shaft 10 may include a flange portion 11 and a shaft portion 12. The flange portion 11 and the shaft portion 12 are coaxial and connected to each other. In an exemplary embodiment, the flange portion 11 and the shaft portion 12 may be integrally formed. The flange portion 11 has an outer diameter larger than that of the shaft portion 12.
The flange portion 11 may have a substantially disc shape. The flange portion 11 is adapted to be torsionally connected to a wheel (not shown) of a vehicle, for example by means of bolts or the like. In an exemplary embodiment, the flange portion 11 may include one or more axial through holes. The axial through holes may be uniformly distributed in the circumferential direction. The axial through-hole may be used to connect the flange shaft to the wheel torsionally, and may reduce the weight of the flange shaft.
Fig. 3 is an enlarged partial schematic view of the flange shaft of fig. 2. The shaft portion 12 may include a plurality of segments distributed in an axial direction. In an exemplary embodiment, as shown in fig. 2 and 3, the shaft portion 12 may include a first section 121 and a second section 122. The first section 121 is located between the second section 122 and the flange portion 11. In the exemplary embodiment, an outer diameter of first section 121 is greater than an outer diameter of second section 122.
The planetary gear 30 is coaxially fitted over the flange shaft 10, for example over the first section 121 of the shaft portion 12. The planetary transmission 30 may include a sun gear 31, an outer ring gear 32, planet gears 33, and a planet carrier 34. In the embodiment shown in fig. 2, the sun gear 31 and the outer ring gear 32 are arranged coaxially with the flange shaft 10, the outer ring gear 32 surrounding the sun gear 31; a plurality of planetary gears 33 are arranged between the sun gear 31 and the outer ring gear 32, and meshed with the sun gear 31 and the outer ring gear 32; and the pinion 33 is rotatably connected to the carrier 34.
In an exemplary embodiment, the motor 40 may be an inner rotor motor (e.g., a high-speed inner rotor motor). As shown in fig. 2, the motor 40 may include a stator 41, a rotor 42, and a rotor bracket 43. The rotor 42 is located radially inward of the stator 41. The rotor 42 is connected to the rotor holder 43 in a rotationally fixed manner. The rotor bracket 43 may be rotatably supported in the housing 20 by a bearing (not shown). In an exemplary embodiment, the planetary transmission 30 may be located in a radially inner portion of the motor 40 (rotor 42 and rotor carrier 43). In other embodiments, motor 40 may also be an external rotor motor.
The output of the electric motor 40 can be connected to the input of the planetary gear 30 in a rotationally fixed manner. In an exemplary embodiment, the rotor support 43 may be rotationally fixed to the sun gear 31. For example, the rotor bracket 43 may be connected to the sun gear 31 by way of an interference fit, splines, bolts, or the like.
The output of the planetary gear 30 can be connected to the wheels of the vehicle in a rotationally fixed manner. According to some embodiments of the present invention, the planet carrier 34 of the planetary transmission 30 may be torsionally connected to the wheels of a vehicle. In an exemplary embodiment, the carrier 34 and the flange portion 11 may be together torsionally connected to the wheel by bolts or the like.
The first bearing 50 may include an outer race 51, an inner race 52, and rolling bodies 53. The rolling bodies 53 can roll in the radial space defined by the inner ring 51 and the outer ring 52. According to some embodiments of the invention, the first bearing 50 may also comprise a cage. The outer race 51 may be connected to the housing 20, such as torsionally connected. The inner ring 52 is fitted over the shaft portion 12 of the flange shaft 10, for example over the second section 122. According to some embodiments of the invention, the inner ring 52 is torsionally sleeved over the second portion 122. In an exemplary embodiment, one axial end face of the first bearing 50 (an axial end face near the flange portion 11) may abut against an end face between the first section 121 and the second section 122 of the shaft portion 12.
According to some embodiments of the invention, the shaft portion 12 may comprise a third section 123. The second section 122 is located between the first section 121 and the third section 123. In the exemplary embodiment, an outer diameter of third section 123 is smaller than an outer diameter of second section 122. According to some embodiments of the invention, the hub drive system may further include a pressure block 70. The press block 70 is fitted over the third section 123. The press block 70 may limit the axial position of the first bearing 50 on the flange shaft 10. In an exemplary embodiment, the other axial end face (the axial end face away from the flange portion 11) of the first bearing 50 may abut against the end face of the press block 70.
According to an embodiment of the invention, the shaft portion 12 of the flange shaft 10 may further comprise an annular groove 124, which is arranged axially on the first section 121. In the exemplary embodiment, the axial position of groove 124 on flange shaft 10 corresponds to sun gear 31. For example, in the hub drive system according to the embodiment of the present invention, the sun gear 31 completely covers the groove 124 of the flange shaft 10 in the axial direction. In the exemplary embodiment, the axial width of sun gear 31 is greater than the axial width of grooves 124. As shown in fig. 3, the groove 124 may define a bottom surface 124A and end surfaces 124B, 124C.
The second bearing 60 may be disposed in the groove 124. Fig. 4 is a schematic view of a second bearing according to an embodiment of the invention. According to some embodiments of the invention, the second bearing 60 may comprise rolling elements 61 and a cage 62. The radially inner surface of the sun gear 31 of the planetary transmission 30 may define the radially outer raceway of the second bearing 60, and the bottom surface 124A of the groove 124 may define the radially inner raceway of the second bearing 60. The rolling bodies 62 may roll in a radial space defined between the sun gear 31 and the grooves 124. For example, the rolling bodies 62 may be cylindrical rollers. In an exemplary embodiment, the second bearing 60 may include two rows of rolling elements 61.
Thus, in contrast to existing hub drive systems, a hub drive system according to an embodiment of the present invention may utilize the sun gear 31 and the grooves 124 to define the rolling body raceways of the second bearing 60, thereby requiring only the additional provision of the rolling bodies 61 and the cage 62. This allows for the addition of additional support bearings to increase the load carrying capacity of the flange shaft without changing the basic structure of the hub drive system. The second bearing according to the embodiment of the invention occupies a small space compared to a conventional bearing including an inner ring and an outer ring. The hub drive system according to the invention provides two bearings on the flange shaft, which can significantly increase the rigidity of the flange shaft, thereby reducing the risk of lubricant leakage. According to the embodiment of the invention, the two bearings arranged on the flange shaft can bear equivalent load and torque together, and compared with the case that only one bearing is arranged on the flange shaft, the load born by each bearing is reduced, so that the service lives of the bearing, the flange shaft and the hub driving system can be prolonged. The inventors have found by finite element analysis that in a hub drive system according to an embodiment of the present invention, the maximum deformation of the flange shaft is less than 0.14mm. Compared with the existing hub driving system (deformation reaches about 1 mm), the invention can remarkably reduce the deformation of the flange shaft.
According to some embodiments of the invention, the axial width of the cage 62 of the second bearing 60 corresponds to the axial width of the groove 124. The axial width of the groove 124 may be substantially equal to or slightly greater than the axial width of the cage 62. According to some embodiments of the invention, the cage 62 may be disposed in the groove 124 in an interference fit. The two axial end surfaces of the second bearing 60 may abut against the end surfaces 124B and 124C of the groove 124, respectively. Thus, the groove 124 may define the position of the second bearing 60 in the axial direction.
According to some embodiments of the present invention, the cage 62 may include two side rings 621, 622 and a plurality of tabs 623 circumferentially spaced apart. Tab 623 connects side rings 621 and 622. In an exemplary embodiment, the tabs 623 may have the same spacing in the circumferential direction. The tab 623, side loops 621 and 622 define a plurality of pockets. Each pocket may hold one rolling element 61.
According to some embodiments of the invention, the cage 62 may define two or more rows of pockets. As shown in fig. 4, cage 62 may also include an intermediate ring 624. In the exemplary embodiment, intermediate ring 624 is positioned at an axial center between side rings 621 and 622. Intermediate ring 624 is connected to tab 623. In other embodiments, cage 62 may also include a plurality of intermediate rings 624. When the cage 62 includes multiple rows of pockets, the pockets in each row may be circumferentially disposed in aligned or offset positions relative to one another.
According to some embodiments of the present invention, as shown in FIG. 4, the retainer 62 may also include a slit 625. The slit 625 extends axially from one axial end face to the other axial end face of the cage 62 and radially from the radially inner surface to the radially outer surface of the cage 62. That is, the holder 62 is broken at the slit 625. The cage 62 may have two circumferential end surfaces opposite each other at the slit 625.
According to some embodiments of the present invention, the cage 62 may be configured to be elastically deformable. In an exemplary embodiment, the cage 62 can be elastically pulled away from the slit 625 such that the distance of the two circumferential end surfaces of the cage 62 in the circumferential direction increases. The retainer 62 can be mounted on the flange shaft 10 from the groove 124 by increasing the spacing between the circumferential end surfaces of the retainer 62 to be larger than the outer diameter of the flange shaft 10 at the groove 124 by elastic deformation. Alternatively, the cage 62 may be axially moved from the end of the flange shaft 10 remote from the flange portion 11 to the groove 124 and mounted on the flange shaft 10 around the groove 124 by elastically deforming the cage 62 to have an inner diameter larger than an outer diameter of the flange shaft 10 at the first section 121. Thus, according to an embodiment of the present invention, the holder 62 including the slit 625 can be easily mounted on the flange shaft 10.
According to some embodiments of the present invention, as shown in fig. 4, the circumferential end surface of the retainer 62 may be formed in a zigzag line shape at the slit 625, as viewed from one axial end surface of the retainer 62. For example, fig. 4 shows that a meandering line shape formed of three straight lines is formed at the slit 625. In other embodiments, a meandering line shape formed by more or fewer other types of lines may also be formed. The tortuous wiring defined by slit 625 may provide retainer 62 with spring characteristics in accordance with embodiments of the present invention. For example, when subjected to vibration or acceleration, the cage 62 may elastically expand at the slit 625, thereby reducing the vibration load to which the cage 62 and the rolling elements 61 are subjected.
According to some embodiments of the invention, the cage 62 may also include a snap at the circumferential end face. When the engagement portions engage each other at the slit 625, the engagement portions may inhibit relative displacement between the two circumferential end surfaces of the retainer 62, such as relative displacement in the axial, radial, and/or circumferential directions.
The cage 62 described above includes a single slit 625. But the present invention is not limited thereto. The holder 62 may also include a plurality of slits according to embodiments of the present invention. In this case, the cage 62 includes a plurality of circumferential sections separated from each other. According to some embodiments of the invention, the circumferential sections may be connected to each other by means of a snap-fit or the like.
The slots 625 of the cage 62 are described above as being both radially and axially through slots. But the present invention is not limited thereto. According to an embodiment of the present invention, the holder 62 may further comprise at least one through slit and at least one non-through slit. A non-through slit means that the cage 62 is not completely broken at that slit. In this case, the non-penetrating slit may enhance the elastic deformability of the holder 62 so that it can be more easily mounted on the flange shaft.
While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the constructions and methods of the above-described embodiments. On the contrary, the invention is intended to cover various modifications and equivalent arrangements. In addition, while the various elements and method steps of the disclosed invention are shown in various combinations and configurations, which are exemplary, other combinations, including more, less elements or methods, are also within the scope of the invention.
Claims (7)
1. A hub drive system for a vehicle, comprising:
a housing (20);
A planetary transmission (30) including a sun gear (31);
flange shaft (10), comprising:
A flange portion (11) torsionally connected to a wheel of a vehicle; and
-A shaft portion (12) comprising a first section (121) and a second section (122) distributed in an axial direction, the first section (121) being located between the flange portion (11) and the second section (122), wherein the shaft portion (12) is coaxial with the flange portion (11) and the flange portion (11) has an outer diameter that is larger than the outer diameter of the shaft portion (12), wherein the shaft portion (12) further comprises an annular groove (124), the groove (124) being provided on the first section (121);
-a first bearing (50), wherein an inner ring of the first bearing (50) is coaxially arranged on the second section (122) and an outer ring of the first bearing (50) is connected to the housing (20); and
A second bearing (60) comprising rolling elements (61) and a cage (62), wherein the cage (62) is arranged in the groove (124), wherein the groove (124) defines a radially inner raceway of the second bearing (60) and a sun gear (31) of the planetary transmission (30) defines a radially outer raceway of the second bearing (60).
2. The hub drive system of claim 1, wherein an outer diameter of the first section (121) is larger than an outer diameter of the second section (122).
3. The hub drive system of claim 1, wherein an axial width of the groove (124) corresponds to an axial width of the cage (62) of the second bearing (60).
4. The hub drive system of claim 1, wherein the cage (62) includes a slit (625) defining a first circumferential end face and a second circumferential end face of the cage (62), and the slit (625) extends axially from the first axial end face to the second axial end face of the cage (62) and radially from a radially inner surface to a radially outer surface of the cage (62).
5. The hub drive system of claim 4 wherein the cage (62) includes a single slit (625) and the cage (62) is resiliently pulled apart from the slit (625) such that the spacing between the first and second circumferential end faces expands to the extent of being able to accommodate the groove (124) of the flange shaft (10).
6. The hub drive system of claim 4, wherein the first and second circumferential end surfaces define respective serpentine wire shapes that correspond to each other as viewed from the first or second axial end surfaces of a cage (62).
7. The hub drive system according to claim 1, wherein the shaft portion (12) further comprises a third section (123), wherein the second section (122) is located between the first section (121) and the third section (123), and an outer diameter of the third section (123) is smaller than an outer diameter of the second section (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199891.6A CN110254219B (en) | 2018-03-12 | 2018-03-12 | Flange shaft, flange shaft assembly and hub driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199891.6A CN110254219B (en) | 2018-03-12 | 2018-03-12 | Flange shaft, flange shaft assembly and hub driving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110254219A CN110254219A (en) | 2019-09-20 |
| CN110254219B true CN110254219B (en) | 2024-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810199891.6A Active CN110254219B (en) | 2018-03-12 | 2018-03-12 | Flange shaft, flange shaft assembly and hub driving system |
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| Country | Link |
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| CN (1) | CN110254219B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015137762A (en) * | 2014-01-24 | 2015-07-30 | 日本精工株式会社 | Cage and roller |
| CN106853768A (en) * | 2015-12-09 | 2017-06-16 | 舍弗勒技术股份两合公司 | Hub driver assembly |
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| JP2005029116A (en) * | 2003-07-11 | 2005-02-03 | Tcm Corp | Drive device for vehicles |
| JP2005231564A (en) * | 2004-02-23 | 2005-09-02 | Ntn Corp | Electric wheel driving device |
| JP2011207375A (en) * | 2010-03-30 | 2011-10-20 | Ntn Corp | Bearing device for wheel containing in-wheel type motor |
| WO2013047695A1 (en) * | 2011-09-28 | 2013-04-04 | Ntn株式会社 | Bearing device for wheel with built-in in-wheel motor |
| JP2013129283A (en) * | 2011-12-21 | 2013-07-04 | Ntn Corp | Drive device for electric vehicle |
| JP2014065396A (en) * | 2012-09-26 | 2014-04-17 | Samsung Electromechanics Japan Advanced Technology Co Ltd | Wheel driving device |
| US9841058B2 (en) * | 2015-04-29 | 2017-12-12 | Aktiebolaget Skf | Assembly procedure of a bearing unit—hub flange |
-
2018
- 2018-03-12 CN CN201810199891.6A patent/CN110254219B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015137762A (en) * | 2014-01-24 | 2015-07-30 | 日本精工株式会社 | Cage and roller |
| CN106853768A (en) * | 2015-12-09 | 2017-06-16 | 舍弗勒技术股份两合公司 | Hub driver assembly |
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|---|---|
| CN110254219A (en) | 2019-09-20 |
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