CN112440731A - Hub reduction gear, hub power assembly and vehicle - Google Patents
Hub reduction gear, hub power assembly and vehicle Download PDFInfo
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- CN112440731A CN112440731A CN201910797655.9A CN201910797655A CN112440731A CN 112440731 A CN112440731 A CN 112440731A CN 201910797655 A CN201910797655 A CN 201910797655A CN 112440731 A CN112440731 A CN 112440731A
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- planetary gear
- shaft
- gear train
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- 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
Abstract
The invention discloses a hub reduction gear, a hub power assembly and a vehicle, wherein the hub reduction gear comprises a parallel shaft gear mechanism, and the parallel shaft gear mechanism is provided with a parallel shaft gear mechanism output end and a parallel shaft gear mechanism input end connected with a power device; the planetary gear mechanism includes: the asteroid train includes: a small sun gear, a small planet carrier and a small gear ring; the large planetary gear train includes: a large sun gear, a large planet carrier and a large gear ring; the small planetary gear train and the large planetary gear train are coaxially and radially arranged, and the power input end of the large planetary gear train and the power output end of the small planetary gear train are at least partially overlapped in the radial direction. The wheel-side reducer has a large reduction ratio, fully utilizes the space in the radial direction of the wheel-side reducer, and has small axial size and compact structure.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a wheel-side speed reducer, a wheel-side power assembly and a vehicle.
Background
In the related art, in a pure electric vehicle power system, the existing wheel-side motor and the wheel-side speed reducer are large in size, and from the structural arrangement perspective, the arrangement space is precious due to the fact that parts such as a power battery, a motor, a speed reducer and a brake need to be arranged in a limited space, and the arrangement of the parts or accessories of the vehicle is limited or not facilitated to a certain extent in the prior art.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a hub reduction gear having a large reduction ratio, which fully utilizes the space in the radial direction of the hub reduction gear, and which has a small axial dimension and a compact structure.
The invention also provides a wheel-side power assembly with the wheel-side speed reducer.
The invention also provides a vehicle with the wheel-side power assembly.
The hub reduction gear according to the present invention includes: a parallel axis gear mechanism having a parallel axis gear mechanism output and a parallel axis gear mechanism input connected to the power plant; a planetary gear mechanism, the planetary gear mechanism comprising: an asteroid train, the asteroid train comprising: the planetary gear set comprises a small sun gear, a small planet carrier and a small gear ring, wherein one of the small sun gear, the small planet carrier and the small gear ring is fixed to be constructed as a fixed end, the other is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of a small planetary gear train, and the other is constructed as a power output end of the small planetary gear train; a large planetary gear train, the large planetary gear train comprising: the planetary gear set comprises a large sun gear, a large planet carrier and a large gear ring, wherein one of the large sun gear, the large planet carrier and the large gear ring is fixed to be constructed as a fixed end, the other is connected with a power output end of a small planetary gear train to be constructed as a power input end of the large planetary gear train, and the other is constructed as a power output end of the large planetary gear train; the small planetary gear train and the large planetary gear train are coaxially and radially arranged, and the power input end of the large planetary gear train and the power output end of the small planetary gear train are at least partially overlapped in the radial direction.
According to the wheel-side speed reducer, the small planetary gear train and the large planetary gear train are arranged, so that the wheel-side speed reducer has a larger speed reduction ratio compared with a parallel shaft speed reducer, meanwhile, in the small planetary gear train and the large planetary gear train, the power input end of the large planetary gear train is at least partially overlapped with the power output end of the small planetary gear train in the radial direction, the axial size of the wheel-side speed reducer is shortened, the structure of the wheel-side speed reducer is more compact, the occupied space is small, and the arrangement of a vehicle power transmission system is convenient.
According to one embodiment of the invention, the parallel shaft gear mechanism comprises: the power device comprises a first shaft and a second shaft, wherein the first shaft is connected with the power device, the second shaft is connected with the power input end of the asteroid gear train, a first shaft gear is arranged on the first shaft, and a second shaft gear meshed with the first shaft gear is arranged on the second shaft.
According to one embodiment of the invention, the parallel shaft gear mechanism comprises: the power device comprises a first shaft, a second shaft and an intermediate shaft, wherein the first shaft is connected with the power device, the second shaft is connected with a power input end of the asteroid gear train, a first shaft gear is arranged on the first shaft, a second shaft gear is arranged on the second shaft, and an intermediate shaft moving gear meshed with the first shaft gear and an intermediate shaft driven gear meshed with the second shaft gear are arranged on the intermediate shaft.
According to one embodiment of the invention, the small planet carrier is fixed to be constructed as a fixed end, the small sun gear is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of a small planetary gear train, and the small ring gear is constructed as a power output end of the small planetary gear train; big planet carrier is fixed with the structure as the stiff end, big sun gear with little ring gear links to each other with the structure for big planetary gear train power input end, big ring gear structure is big planetary gear train power output end.
According to one embodiment of the invention, the small gear ring is fixed to be constructed as a fixed end, the small sun gear is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of a small planetary gear train, and the small planet carrier is constructed as a power output end of the small planetary gear train; the big ring gear is fixed with the structure as the stiff end, big sun gear with little planet carrier links to each other with the structure for big planetary gear train power input end, big planet carrier structure is big planetary gear train power output end.
According to one embodiment of the invention, the small gear ring is fixed to be constructed as a fixed end, the small sun gear is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of a small planetary gear train, and the small planet carrier is constructed as a power output end of the small planetary gear train; big planet carrier is fixed with the structure as the stiff end, big sun gear with little planet carrier links to each other with the structure for big planetary gear train power input end, big ring gear structure is big planetary gear train power output end.
According to one embodiment of the invention, the small planet carrier is fixed to be constructed as a fixed end, the small sun gear is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of a small planetary gear train, and the small ring gear is constructed as a power output end of the small planetary gear train; the big ring gear is fixed with the structure as the stiff end, big sun gear with little ring gear links to each other with the structure as big planetary gear train power input end, big planet carrier structure is big planetary gear train power output end.
According to one embodiment of the invention, the small ring gear and the large sun gear are an integral molding.
The wheel-side powertrain and the vehicle according to the embodiment of the invention are briefly described below.
The wheel-side power assembly comprises the wheel-side speed reducer in the embodiment, and the wheel-side power assembly is provided with the wheel-side speed reducer in the embodiment, so that the wheel-side power assembly can realize transmission with a large speed reduction ratio, is compact in structure, and has the advantages of small occupied space and convenience in arrangement.
The vehicle comprises the wheel-side power assembly of the embodiment, and the vehicle is provided with the wheel-side power assembly of the embodiment, so that the power assembly of the vehicle can realize large-reduction-ratio transmission, the chassis arrangement of the vehicle is more compact and reasonable, the reliability of power transmission is high, and the stability is good.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic illustration of a wheel hub reduction gear according to one embodiment of the present invention;
FIG. 2 is a schematic structural view of a hub reduction gear according to another embodiment of the present invention;
FIG. 3 is a schematic structural view of a hub reduction gear according to yet another embodiment of the present invention;
FIG. 4 is a schematic structural view of a hub reduction gear according to yet another embodiment of the present invention;
FIG. 5 is a schematic structural view of a hub reduction gear according to yet another embodiment of the present invention;
FIG. 6 is a schematic structural view of a hub reduction gear according to yet another embodiment of the present invention;
FIG. 7 is a schematic structural view of a hub reduction gear according to yet another embodiment of the present invention;
fig. 8 is a schematic structural view of a vehicle according to the present invention.
Reference numerals:
the wheel-side speed reducer 1 is provided with a wheel-side speed reducer,
a small planetary gear train 11, a small sun gear 111, a small planet carrier 112, a small gear ring 113,
a big planetary gear train 12, a big sun gear 121, a big planet carrier 122, a big ring gear 123,
the parallel shaft gear mechanism 13, a first shaft 131, a first shaft gear 131a, a second shaft 132, a second shaft gear 132a, a counter shaft 133, a counter shaft drive gear 133a, a counter shaft driven gear 133b,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A hub reduction gear 1 according to an embodiment of the present invention is described below with reference to fig. 1 to 8.
The wheel hub reduction gear 1 for a vehicle according to the present invention includes: a parallel axis gear mechanism 13 and a planetary gear mechanism, wherein the parallel axis gear mechanism 13 has a parallel axis gear mechanism output end and a parallel axis gear mechanism input end connected with the power device 101; the planetary gear mechanism includes a minor planetary gear train 11 and a major planetary gear train 12, the minor planetary gear train 11 including: the planetary gear train comprises a small sun gear 111, a small planet carrier 112 and a small gear ring 113, wherein one of the small sun gear 111, the small planet carrier 112 and the small gear ring 113 is fixed to be constructed as a fixed end, and the other is connected with an output end of a parallel shaft gear mechanism to be constructed as a power input end and a power output end of a small planet gear train; the large planetary gear train 12 includes: the planetary gear train comprises a large sun gear 121, a large planet carrier 122 and a large gear ring 123, wherein one of the large sun gear 121, the large planet carrier 122 and the large gear ring 123 is fixed to be constructed as a fixed end, the other is connected with a power output end of a small planetary gear train to be constructed as a power input end of the large planetary gear train, and the other is constructed as a power output end of the large planetary gear train; the small planetary gear train and the large planetary gear train are coaxially and radially arranged, and the power input end of the large planetary gear train and the power output end of the small planetary gear train are at least partially overlapped in the radial direction.
The parallel shaft gear mechanism 13 is provided with a parallel shaft gear mechanism input end and a parallel shaft gear mechanism output end, power is decelerated in the parallel shaft gear mechanism 13 through the parallel shaft gear mechanism input end to the parallel shaft gear mechanism output end, and the parallel shaft gear mechanism output end is axially connected with the planetary gear mechanism.
By combining the small planetary gear train 11 and the large planetary gear train 12 in the planetary gear mechanism, the wheel reduction gear 1 of the vehicle is realized to have a larger reduction ratio, in the asteroid train 11, by providing the small sun gear 111, the small carrier 112, and the small ring gear 113, and setting one of them as a fixed end, in the planetary gear train, by fixing one of the sun gear, the planet carrier and the gear ring, so that the other two structures are an input end and an output end, power can realize first speed reduction and torque increase in the small planetary gear train 11, the output end of the small planetary gear is connected with the input end in the large planetary gear train 12, and one of the sun gear, the planet carrier and the ring gear in the large planetary gear train 12 is also fixedly arranged, so that the other two structures are a big planetary gear train power input end and a big planetary gear train power output end, and the power is decelerated and torque is increased at the big planetary gear train 12.
After the power sequentially passes through the speed reduction and torque increase of the parallel shaft gear mechanism 13 and the planetary gear mechanism, the speed reduction ratio of the wheel reduction gear 1 according to the application can be greatly improved.
Further, in the large planetary gear train 12 and the small planetary gear train 11, the power input end of the large planetary gear train is disposed radially outward or radially inward of the power input end of the small planetary gear train, the radial arrangement of the power input ends of the big planetary gear train and the small planetary gear train can reduce the axial occupied sizes of the small planetary gear train 11 and the big planetary gear train 12, fully utilize the radial space of the hub reduction gear 1, lead the arrangement of the hub reduction gear 1 to be more reasonable, simultaneously, because the axial size of the hub reduction gear 1 is reduced, in a vehicle in which this wheel-side reducer 1 is installed, it is possible to make the chassis of the vehicle have a larger layout space, the hub reduction gear 1 can occupy the axial size of the power transmission system less, so that the arrangement of other chassis parts is facilitated, the production difficulty of the vehicle is reduced, and the arrangement of the vehicle chassis is more compact and reasonable.
According to the hub reduction gear 1, the small planetary gear train 11 and the large planetary gear train 12 are arranged, so that the hub reduction gear 1 has a larger reduction ratio compared with a parallel shaft reduction gear, meanwhile, in the small planetary gear train 11 and the large planetary gear train 12, the power input end of the large planetary gear train is at least partially overlapped with the power output end of the small planetary gear train in the radial direction, the axial size of the hub reduction gear 1 is shortened, the structure of the hub reduction gear 1 is more compact, the occupied space is small, and the arrangement of a vehicle power transmission system is convenient.
Further, the big planetary gear train is radially sleeved on the small planetary gear train, the small planetary gear train and the big planetary gear train are completely or at least partially overlapped in the radial direction, and the small gear ring of the small planetary gear train and the big sun gear of the big planetary gear train can be arranged into two separate elements or be arranged into the same element. The hub reduction gear 1 has a large reduction ratio, fully utilizes the space of the hub reduction gear 1 in the radial direction, has small axial size and compact structure, and is particularly beneficial to the layout and carrying of a hub driving system.
As shown in fig. 1 to 4, according to one embodiment of the present invention, the parallel axis gear mechanism 13 includes: the power device comprises a first shaft 131 and a second shaft 132, wherein the first shaft 131 is connected with the power device 101, the second shaft 132 is connected with a power input end of the planetary gear train, a first shaft gear 131a is arranged on the first shaft 131, and a second shaft gear 132a meshed with the first shaft gear 131a is arranged on the second shaft 132.
The first shaft 131 is connected with the power device 101, the power device 101 can directly drive the first shaft 131 to rotate, the first shaft 131 drives the first shaft gear 131a on the first shaft 131, the first shaft gear 131a is meshed with the second shaft gear 132a, a certain gear ratio exists between the first shaft gear 131a and the second shaft gear 132a to achieve speed regulation in the parallel shaft gear mechanism 13, the second shaft gear 132a transmits power after speed regulation to the second shaft 132, and the second shaft 132 outputs the power after speed regulation to the planetary gear mechanism to perform the next speed regulation process.
The parallel gear mechanism is simple in structure, high in reliability and stable in power transmission, the power device 101 and the planetary gear mechanism can be arranged on the same axis, the power device 101 and the hub reduction gear 1 are not limited by an axial space, and the hub reduction gear 1 is more convenient to arrange.
As shown in fig. 5 to 7, according to an embodiment of the present invention, the parallel shaft gear mechanism 13 includes a first shaft 131, a second shaft 132, and an intermediate shaft 133, the first shaft 131 is connected to the power unit 101, the second shaft 132 is connected to the power input end of the asteroid gear train, the first shaft 131 is provided with a first shaft gear 131a, the second shaft 132 is provided with a second shaft gear 132a, and the intermediate shaft 133 is provided with an intermediate shaft drive gear 133a engaged with the first shaft gear 131a and an intermediate shaft driven gear 133b engaged with the second shaft gear 132 a.
The first shaft 131 is connected with the power device 101, the power device 101 can directly drive the first shaft 131 to rotate, the first shaft 131 drives the first shaft gear 131a on the first shaft 131, the first shaft gear 131a is linked with the intermediate shaft driving gear 133a, a certain transmission ratio is provided between the first shaft gear 131a and the intermediate shaft driving gear 133a, the speed regulation of the power of the driving device can be realized, the intermediate shaft driving gear 133a drives the intermediate shaft 133 to rotate, and drives the intermediate shaft driven gear 133b to rotate, the intermediate shaft driven gear 133b is engaged with the second shaft gear 132a, and the counter driven gear 133b and the second shaft gear 132a have a certain gear ratio therebetween, the second shaft gear 132a transmits the power after speed regulation to the second shaft 132, and the second shaft 132 outputs the power after speed regulation to the planetary gear mechanism for the next speed regulation process.
The parallel gear mechanism is simple in structure, high in reliability and stable in power transmission, the parallel gear mechanism can enable the power device 101 and the planetary gear mechanism not to be arranged on the same axis, the power device 101 and the hub reduction gear 1 are not limited by an axial space, the hub reduction gear 1 is more convenient to arrange, the arrangement of the intermediate shaft 133 enables the parallel shaft gear mechanism 13 to be capable of radially performing power transmission with larger span, and meanwhile, the transmission proportion of the parallel gear mechanism is further improved.
As shown in fig. 2 and 6, according to an embodiment of the present invention, the small carrier 112 is fixed to be configured as a fixed end, the small sun gear 111 is connected to the parallel axis gear mechanism output end to be configured as a small planetary gear train power input end, and the small ring gear 113 is configured as a small planetary gear train power output end; the large planet carrier 122 is fixed to be constructed as a fixed end, the large sun gear 121 is connected with the small ring gear 113 to be constructed as a large planetary gear train power input end, and the large ring gear 123 is constructed as a large planetary gear train power output end.
The small sun gear 111 is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of the asteroid gear train, and the small ring gear 113 is constructed as a power output end of the asteroid gear train. The output end of the parallel shaft gear mechanism drives the small sun gear 111, the small sun gear 111 is meshed with a small planetary gear arranged on a small planet carrier 112, the rotating speed and the torque of the small sun gear 111 are transmitted to the small planetary gear, the small planet gear is fixed by the small planet carrier 112 and cannot do circular motion around the sun gear, so that the small planetary gear and the small sun gear 111 are in fixed-ratio transmission, the small planet gear is meshed with teeth on the small gear ring 113, the small gear ring 113 is driven to rotate in the autorotation process of the small planet gear, and the power of the output end of the parallel shaft gear mechanism is transmitted to the small gear ring 113 to realize speed reduction and torque increase. The small ring gear 113 can transmit power to the large input of the large planetary gear train 12 for the second stage of speed reduction and torque increase.
By fixing the small planet carrier 112, arranging the small sun gear 111 as the power input end of the small planetary gear train and constructing the small ring gear 113 as the power output end of the small planetary gear train, the arrangement mode of the above embodiment can make the transmission between the small planetary gear train 11 and the large planetary gear train 12 simpler and more direct, and the transmission path between the output end of the parallel shaft gear mechanism and the small planetary gear train 11 is short.
In the large planetary gear train 12, a large carrier 122 is fixed to be configured as a fixed end, a large sun gear 121 is connected to a small carrier 112 to be configured as a large planetary gear train power input end, and a large ring gear 123 is connected to a wheel to be configured as a large planetary gear train power output end.
In the big planetary gear train 12, the power at the output end of the small planetary gear train 11 is transmitted to the big sun gear 121, the big sun gear 121 is meshed with the big planetary gear on the big planet carrier 122, the inner side of the big planetary gear is meshed with the big sun gear 121, and the outer side of the big planetary gear is meshed with the big gear ring 123. because the big planet carrier 122 is structured as a fixed end, the big planetary gear cannot rotate around the big sun gear 121 while rotating, but can drive the big gear ring 123 to rotate, so that the power from the big sun gear 121 is transmitted to the big gear ring 123 through speed reduction, and the speed reduction and torque increase of the big planetary gear train 12 are realized.
In the present embodiment, the large planet carrier 122 is configured as a fixed end, and since the large ring gear 123 is disposed outside the large planetary gear train 12, the large ring gear 123 is used as a power output end of the large planetary gear train, so that the arrangement of the large planetary gear train 12 is more convenient, and the structure of wheel reduction is more compact.
As shown in fig. 3 and 7, according to an embodiment of the present invention, the small ring gear 113 is fixed to be configured as a fixed end, the small sun gear 111 is connected to the parallel axis gear mechanism output to be configured as a small planetary gear train power input end, and the small carrier 112 is configured as a small planetary gear train power output end; the large ring gear 123 is fixed to be constructed as a fixed end, the large sun gear 121 is connected with the small planet carrier 112 to be constructed as a large planetary gear train power input end, and the large planet carrier 122 is constructed as a large planetary gear train power output end.
In the small planetary gear train 11, the small sun gear 111 is connected with the output end of the parallel shaft gear mechanism, the small sun gear 111 is meshed with the small planetary gear, the inner side of the small planetary gear is meshed with the small sun gear 111, the outer side of the small planetary gear is meshed with the small gear ring 113, and the small gear ring 113 is a fixed end, so that the small planetary gear rotates around the small sun gear 111 in the process of being meshed with the small gear ring 113 and rotating, the small planet carrier 112 rotates, and in the small planetary gear train 11, power is transmitted to the small gear ring 113 through the small sun gear 111 to achieve speed reduction and torque increase. In the embodiment that the small gear ring 113 is constructed as the fixed end, the small gear ring 113 is simple in structure and more convenient to fix, and the gear ring is fixed firstly in the installation process, so that arrangement of other parts can be facilitated.
In the large planetary gear train 12, the power at the output end of the small planetary gear train 11 is transmitted to the large sun gear 121, the large sun gear 121 is meshed with the large planetary gear on the large planetary gear carrier 122, the inner side of the large planetary gear is meshed with the large sun gear 121, the outer side of the large planetary gear is meshed with the large ring gear 123, and as the large ring gear 123 is constructed as a fixed end, the large planetary gear rotates around the large sun gear 121 while rotating, so that the large planetary gear carrier 122 rotates, the power from the large sun gear 121 is transmitted to the large planetary gear carrier 122 through speed reduction, and speed reduction and torque increase of the large planetary gear train 12 are realized.
In the present embodiment, the large ring gear 123 is configured as a fixed end, and since the large ring gear 123 is disposed outside the large planetary gear train 12, it is more convenient to fix the large ring gear 123, and by fixing the large ring gear 123, the arrangement of the large planetary gear train 12 can be more convenient, and the structure of wheel reduction can be more compact.
As shown in fig. 4, according to an embodiment of the present invention, the small ring gear 113 is fixed to be configured as a fixed end, the small sun gear 111 is connected to the parallel axis gear mechanism output to be configured as a small planetary gear train power input end, and the small planet carrier 112 is configured as a small planetary gear train power output end; the large planet carrier 122 is fixed to be constructed as a fixed end, the large sun gear 121 is connected with the small planet carrier 112 to be constructed as a large planetary gear train power input end, and the large ring gear 123 is constructed as a large planetary gear train power output end.
In the small planetary gear train 11, the small sun gear 111 is connected with the output end of the parallel shaft gear mechanism, the small sun gear 111 is meshed with the small planetary gear, the inner side of the small planetary gear is meshed with the small sun gear 111, the outer side of the small planetary gear is meshed with the small gear ring 113, and the small gear ring 113 is a fixed end, so that the small planetary gear rotates around the small sun gear 111 in the process of being meshed with the small gear ring 113 and rotating, the small planet carrier 112 rotates, and in the small planetary gear train 11, power is transmitted to the small gear ring 113 through the small sun gear 111 to achieve speed reduction and torque increase. In the embodiment that the small gear ring 113 is constructed as the fixed end, the small gear ring 113 is simple in structure and more convenient to fix, and the gear ring is fixed firstly in the installation process, so that arrangement of other parts can be facilitated.
In the large planetary gear train 12, a large carrier 122 is fixed to be configured as a fixed end, a large sun gear 121 is connected to a small carrier 112 to be configured as a large planetary gear train power input end, and a large ring gear 123 is connected to a wheel to be configured as a large planetary gear train power output end.
In the big planetary gear train 12, the power at the output end of the small planetary gear train 11 is transmitted to the big sun gear 121, the big sun gear 121 is meshed with the big planetary gear on the big planet carrier 122, the inner side of the big planetary gear is meshed with the big sun gear 121, and the outer side of the big planetary gear is meshed with the big gear ring 123. because the big planet carrier 122 is structured as a fixed end, the big planetary gear cannot rotate around the big sun gear 121 while rotating, but can drive the big gear ring 123 to rotate, so that the power from the big sun gear 121 is transmitted to the big gear ring 123 through speed reduction, and the speed reduction and torque increase of the big planetary gear train 12 are realized.
In the present embodiment, the large planet carrier 122 is configured as a fixed end, and since the large ring gear 123 is disposed outside the large planetary gear train 12, the large ring gear 123 is used as a power output end of the large planetary gear train, so that the arrangement of the large planetary gear train 12 is more convenient, and the structure of wheel reduction is more compact.
As shown in fig. 1 and 5, according to an embodiment of the present invention, the small carrier 112 is fixed to be configured as a fixed end, the small sun gear 111 is connected to the parallel axis gear mechanism output end to be configured as a small planetary gear train power input end, and the small ring gear 113 is configured as a small planetary gear train power output end; the large ring gear 123 is fixed to be constructed as a fixed end, the large sun gear 121 is connected with the small ring gear 113 to be constructed as a large planetary gear train power input end, and the large planet carrier 122 is constructed as a large planetary gear train power output end.
The small sun gear 111 is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of the asteroid gear train, and the small ring gear 113 is constructed as a power output end of the asteroid gear train. The output end of the parallel shaft gear mechanism drives the small sun gear 111, the small sun gear 111 is meshed with a small planetary gear arranged on a small planet carrier 112, the rotating speed and the torque of the small sun gear 111 are transmitted to the small planetary gear, the small planet gear is fixed by the small planet carrier 112 and cannot do circular motion around the sun gear, so that the small planetary gear and the small sun gear 111 are in fixed-ratio transmission, the small planet gear is meshed with teeth on the small gear ring 113, the small gear ring 113 is driven to rotate in the autorotation process of the small planet gear, and the power of the output end of the parallel shaft gear mechanism is transmitted to the small gear ring 113 to realize speed reduction and torque increase. The small ring gear 113 can transmit power to the large input of the large planetary gear train 12 for the second stage of speed reduction and torque increase.
By fixing the small planet carrier 112, arranging the small sun gear 111 as the power input end of the small planetary gear train and constructing the small ring gear 113 as the power output end of the small planetary gear train, the arrangement mode of the above embodiment can make the transmission between the small planetary gear train 11 and the large planetary gear train 12 simpler and more direct, and the transmission path between the output end of the parallel shaft gear mechanism and the small planetary gear train 11 is short.
In the large planetary gear train 12, the power at the output end of the small planetary gear train 11 is transmitted to the large sun gear 121, the large sun gear 121 is meshed with the large planetary gear on the large planetary gear carrier 122, the inner side of the large planetary gear is meshed with the large sun gear 121, the outer side of the large planetary gear is meshed with the large ring gear 123, and as the large ring gear 123 is constructed as a fixed end, the large planetary gear rotates around the large sun gear 121 while rotating, so that the large planetary gear carrier 122 rotates, the power from the large sun gear 121 is transmitted to the large planetary gear carrier 122 through speed reduction, and speed reduction and torque increase of the large planetary gear train 12 are realized.
In the present embodiment, the large ring gear 123 is configured as a fixed end, and since the large ring gear 123 is disposed outside the large planetary gear train 12, it is more convenient to fix the large ring gear 123, and by fixing the large ring gear 123, the arrangement of the large planetary gear train 12 can be more convenient, and the structure of wheel reduction can be more compact.
According to an embodiment of the present invention, the small ring gear 113 and the large sun gear 121 are configured as an integrated piece, and the configuration of the small ring gear 113 and the large sun gear 121 as an integrated piece can improve the connection strength between the small ring gear 113 and the large sun gear 121, and ensure more reliable power transmission between the small planetary gear train 11 and the large planetary gear train 12.
In one specific embodiment, the integral molding of the small ring gear 113 and the large sun gear 121 may be configured as a ring gear having internal teeth that mesh with the small pinion in the small planetary gear train 11 to serve as the small ring gear 113 of the small planetary gear train 11 and external teeth that mesh with the large pinion of the large planetary gear train 12 to serve as the large sun gear 121 of the large planetary gear train 12. The small gear ring 113 and the large sun gear 121 are constructed as an integral part, so that the small gear ring 113 and the large sun gear 121 are more compact in structure, the size of the hub reduction gear 1 is reduced, and the reliability of the hub reduction gear 1 is improved.
The wheel-side powertrain 3 according to the embodiment of the present invention is briefly described below.
The wheel-side power assembly 3 according to the embodiment of the invention comprises a power device 101 and the wheel-side reducer 1 in the embodiment, wherein the power input end of the small planetary gear train of the wheel-side reducer 1 is connected with the power device 101. Here, the power unit 101 may be a motor in the above embodiments, but not limited to the form that the power unit 101 is a motor, and the power unit 101 may also be configured as other types of power units 101, such as a motor generator, an engine, and the like.
Because the wheel-side power assembly 3 is provided with the wheel-side speed reducer 1 of the embodiment, the wheel-side power assembly 3 can realize transmission with a large speed reduction ratio, and the wheel-side power assembly 3 has the advantages of compact structure, small occupied space and convenient arrangement.
The vehicle 2 according to the embodiment of the invention is briefly described below.
The vehicle 2 comprises the wheel-side power assembly and the wheels, the wheels are connected with the power output ends of the large planetary gear trains of the wheel-side power assembly, and the vehicle 2 is provided with the wheel-side power assembly of the embodiment, so that the power assembly of the vehicle 2 can realize large reduction ratio transmission, the chassis arrangement of the vehicle 2 is more compact and reasonable, the power transmission reliability is high, and the stability is good.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A wheel hub reduction gear for a vehicle, comprising:
a parallel axis gear mechanism having a parallel axis gear mechanism output and a parallel axis gear mechanism input connected to the power plant;
a planetary gear mechanism, the planetary gear mechanism comprising:
an asteroid train, the asteroid train comprising: the planetary gear set comprises a small sun gear, a small planet carrier and a small gear ring, wherein one of the small sun gear, the small planet carrier and the small gear ring is fixed to be constructed as a fixed end, the other is connected with the output end of the parallel shaft gear mechanism to be constructed as a power input end of a small planetary gear train, and the other is constructed as a power output end of the small planetary gear train;
a large planetary gear train, the large planetary gear train comprising: the planetary gear set comprises a large sun gear, a large planet carrier and a large gear ring, wherein one of the large sun gear, the large planet carrier and the large gear ring is fixed to be constructed as a fixed end, the other is connected with a power output end of a small planetary gear train to be constructed as a power input end of the large planetary gear train, and the other is constructed as a power output end of the large planetary gear train; wherein
The small planetary gear train and the large planetary gear train are coaxially and radially arranged, and the power input end of the large planetary gear train and the power output end of the small planetary gear train are at least partially overlapped in the radial direction.
2. A wheel hub reduction gear for a vehicle according to claim 1, characterized in that the parallel shaft gear mechanism includes: the power device comprises a first shaft and a second shaft, wherein the first shaft is connected with the power device, the second shaft is connected with the power input end of the asteroid gear train, a first shaft gear is arranged on the first shaft, and a second shaft gear meshed with the first shaft gear is arranged on the second shaft.
3. A wheel hub reduction gear for a vehicle according to claim 1, characterized in that the parallel shaft gear mechanism includes: the power device comprises a first shaft, a second shaft and an intermediate shaft, wherein the first shaft is connected with the power device, the second shaft is connected with a power input end of the asteroid gear train, a first shaft gear is arranged on the first shaft, a second shaft gear is arranged on the second shaft, and an intermediate shaft driving gear meshed with the first shaft gear and an intermediate shaft driven gear meshed with the second shaft gear are arranged on the intermediate shaft.
4. A hub reduction gear for a vehicle according to claim 1, wherein said small carrier is fixed so as to be configured as a fixed end, said small sun gear is connected with said parallel shaft gear mechanism output so as to be configured as a small planetary gear train power input end, and said small ring gear is configured as a small planetary gear train power output end;
big planet carrier is fixed with the structure as the stiff end, big sun gear with little ring gear links to each other with the structure for big planetary gear train power input end, big ring gear structure is big planetary gear train power output end.
5. A hub reduction gear for a vehicle according to claim 1, characterized in that the small ring gear is fixed to be configured as a fixed end, the small sun gear is connected to the parallel shaft gear mechanism output to be configured as a small planetary gear train power input end, and the small carrier is configured as a small planetary gear train power output end;
the big ring gear is fixed with the structure as the stiff end, big sun gear with little planet carrier links to each other with the structure for big planetary gear train power input end, big planet carrier structure is big planetary gear train power output end.
6. A hub reduction gear for a vehicle according to claim 1, characterized in that the small ring gear is fixed to be configured as a fixed end, the small sun gear is connected to the parallel shaft gear mechanism output to be configured as a small planetary gear train power input end, and the small carrier is configured as a small planetary gear train power output end;
big planet carrier is fixed with the structure as the stiff end, big sun gear with little planet carrier links to each other with the structure for big planetary gear train power input end, big ring gear structure is big planetary gear train power output end.
7. A hub reduction gear for a vehicle according to claim 1, wherein said small carrier is fixed so as to be configured as a fixed end, said small sun gear is connected with said parallel shaft gear mechanism output so as to be configured as a small planetary gear train power input end, and said small ring gear is configured as a small planetary gear train power output end;
the big ring gear is fixed with the structure as the stiff end, big sun gear with little ring gear links to each other with the structure as big planetary gear train power input end, big planet carrier structure is big planetary gear train power output end.
8. A wheel hub reduction gear for vehicles according to claim 4 or 7, characterized in that the small ring gear is integrally formed with the large sun gear.
9. A wheel hub power assembly, characterized by comprising a wheel hub reduction unit according to any one of claims 1 to 8.
10. A vehicle comprising the wheel-side powertrain of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910797655.9A CN112440731A (en) | 2019-08-27 | 2019-08-27 | Hub reduction gear, hub power assembly and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910797655.9A CN112440731A (en) | 2019-08-27 | 2019-08-27 | Hub reduction gear, hub power assembly and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN112440731A true CN112440731A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910797655.9A Pending CN112440731A (en) | 2019-08-27 | 2019-08-27 | Hub reduction gear, hub power assembly and vehicle |
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| CN (1) | CN112440731A (en) |
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Application publication date: 20210305 |