CN114719004A - Differential device and dual-drive power device - Google Patents
Differential device and dual-drive power device Download PDFInfo
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- CN114719004A CN114719004A CN202210536957.2A CN202210536957A CN114719004A CN 114719004 A CN114719004 A CN 114719004A CN 202210536957 A CN202210536957 A CN 202210536957A CN 114719004 A CN114719004 A CN 114719004A
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- wheel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
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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
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Abstract
The invention relates to the technical field of differentials, in particular to a differential device and a dual-drive power device. Wherein, differential device includes: a left outer wheel; the right outer wheel and the left outer wheel are coaxially arranged on a central line; the outer planet wheel is arranged on a planet carrier and is respectively meshed and connected with the left outer wheel and the right outer wheel; a left inner wheel disposed between the left and right outer wheels and having an axis extending along the centerline; a right inner wheel disposed between the left and right outer wheels and having a centerline extending along the centerline; and the inner planetary wheel is arranged on the planetary carrier and is respectively meshed and connected with the left inner wheel and the right inner wheel. The differential device has the advantages of compact structure, small occupied space, easy arrangement and installation, automatic balance of the rotating speed difference of the two drivers and effective reduction of the requirement on a control algorithm.
Description
Technical Field
The invention relates to the technical field of differentials, in particular to a differential device and a dual-drive power device.
Background
With the importance of people on environmental protection and the vigorous popularization of clean energy, electric automobiles are increasingly receiving attention. Although the efficient working range of the motor is larger than that of the traditional internal combustion engine, the working efficiency of the motor is obviously reduced under the working conditions of low-speed heavy load, low-speed light load, high-speed light load and the like. In addition, the vehicle needs a large torque when climbing a slope and accelerating, and needs a high rotating speed when running at a high speed, and if the motor needs to meet the performance requirements of large torque and high rotating speed at the same time, the manufacturing difficulty and the total weight are increased. Therefore, the conventional solution is to use two electric machines or to combine an electric motor and an engine, such as a dual-power coupling device disclosed in the chinese patent application CN104972888A, and a dual-motor electric vehicle power system disclosed in the chinese patent application CN104709080B and an electric vehicle equipped with the same.
However, the power coupling structure of these solutions is complex, and particularly after the driving component is matched with the differential or the transmission to form the power device, the structure of the power device is too complex, which results in that the manufacturing difficulty is increased, the arrangement difficulty is increased, and the installation space is occupied.
Disclosure of Invention
The invention provides a differential device, aiming at solving the technical problems of complex structure, large manufacturing difficulty, large occupied space and the like of the conventional power device. The differential device comprises a left outer wheel; the right outer wheel and the left outer wheel are coaxially arranged on a central line; the outer planet wheel is arranged on a planet carrier and is respectively in meshed connection with the left outer wheel and the right outer wheel; a left inner wheel disposed between the left and right outer wheels and having an axis extending along the centerline; a right inner wheel disposed between the left and right outer wheels and having a centerline extending along the centerline; and the inner planetary wheel is arranged on the planet carrier and is respectively in meshed connection with the left inner wheel and the right inner wheel.
In the differential device of the invention, the left outer wheel, the right outer wheel and the outer planetary wheel form a set of planetary transmission structure, wherein, the outer planetary wheel can rotate around the planet carrier and can revolve around the central line along with the planet carrier; the left inner wheel, the right inner wheel and the inner planetary wheel form a set of planetary transmission structure, wherein the inner planetary wheel can rotate around the planetary carrier and can revolve around the central line along with the planetary carrier. The two sets of planetary transmission structures are designed in an inner-outer nested mode, the structure is compact, the occupied space can be effectively reduced, and therefore the arrangement and the installation are convenient. It is worth emphasizing that the two sets of planetary transmission structures in the invention not only can be further simplified in structure by sharing the planetary carrier, but also can be organically combined, so that the input and the output of double powers among the left outer wheel, the right outer wheel, the left inner wheel and the right inner wheel are realized. Taking double power input from a left outer wheel and a right outer wheel and output from a left inner wheel and a right inner wheel as an example, when the differential device is used for transmitting power, the two power input sources can have different rotating speeds, namely the rotating speeds of the two drives do not need to be accurately matched, so that the requirement on a double-drive control algorithm can be reduced; the two power output ends can have different rotating speeds, so that the self-adaption of the rotating speed difference is realized, and the stability of power output is effectively improved.
In a preferred embodiment of the differential device, the outer planetary gear has a plurality of outer planetary gears, and the outer planetary gears are arranged along the circumferential direction of the center line; the inner planetary wheel is provided with a plurality of inner planetary wheels which are arranged along the circumferential direction of the center line. Through the configuration, the plurality of outer planet wheels can effectively improve the transmission reliability between the left outer wheel and the right outer wheel; the transmission reliability between the left inner wheel and the right inner wheel can be effectively improved by the plurality of inner planet wheels.
In a preferred embodiment of the differential device, the left outer wheel, the right outer wheel, the outer planetary gear, the left inner wheel, the right inner wheel, and the inner planetary gear are all bevel gears. The bevel gear can facilitate structural arrangement, and the differential device can be more compact and small in structure through the configuration.
In a preferred embodiment of the differential device, the axis of symmetry of the carrier is perpendicular to the center line. With the above configuration, the reliability of the differential mechanism can be effectively improved.
The invention also provides a dual-drive power device which comprises the differential device in any one of the preferable technical schemes; a first driver, power of which is input from a left inner wheel of the differential device; a second driver, power of which is input from a right inner wheel of the differential device; a left wheel connected to a left outer wheel of the differential device; and a right wheel connected with a right outer wheel of the differential device. With the above configuration, the preferred embodiment provides a double-drive double differential power unit in which power is input from the left inner wheel and the right inner wheel and output from the left outer wheel and the right outer wheel.
The invention also provides another double-drive power device which comprises the differential device in any one of the preferable technical schemes; a first driver, power of which is input from a left outer wheel of the differential device; a second driver, power of which is input from a right outer wheel of the differential device; a left wheel connected with a left inner wheel of the differential device; and a right wheel connected with a right inner wheel of the differential device. With the above configuration, the preferred embodiment provides a dual-drive double differential power unit in which power is input from the left and right outer wheels and output from the left and right inner wheels.
In a preferred technical scheme of the differential device, a left transmission shaft is connected to the left inner wheel, and a left transmission cylinder sleeved outside the left transmission shaft is connected to the left outer wheel; the right inner wheel is connected with a right transmission shaft, and the right outer wheel is connected with a right transmission cylinder which is sleeved outside the right transmission shaft. Through the configuration, the transmission cylinder is sleeved outside the transmission shaft, so that the structure of the differential device is more compact.
On the basis of the differential device, the invention also provides a dual-drive power device which comprises the differential device and a first driver, wherein the power of the first driver is input from a left transmission cylinder of the differential device; a second driver, the power of which is input from a right transmission cylinder of the differential device; a left wheel connected with a left drive shaft of the differential device; and the right wheel is connected with a right transmission shaft of the differential device. Through the configuration, the preferable technical scheme provides the double-drive double-differential power device with power input from the left outer wheel and the right outer wheel and power output from the left inner wheel and the right inner wheel. In the invention, two drivers provide power, one large torque drive can be divided into two small torque drives, under the condition of providing the same power, the manufacturing difficulty and the cost of the drivers are reduced, and the weight of the power device is correspondingly reduced; compared with the traditional power device, the power device has obvious technical progress.
In a preferred technical scheme of the dual-drive power device, the first driver is provided with a first driving shaft, a first driving wheel is arranged on the first driving shaft, a first driven wheel is arranged on the left transmission cylinder, and the first driven wheel is meshed with the first driving wheel; the second driver is provided with a second driving shaft, a second driving wheel is arranged on the second driving shaft, a second driven wheel is arranged on the right transmission cylinder, and the second driven wheel is meshed with the second driving wheel. Through the configuration, the position relation between the driver and the differential device can be changed, so that the arrangement position of the driver is more flexible.
In the preferable technical scheme of the dual-drive power device, the first driven wheel and the left transmission cylinder are integrally formed; the second driven wheel and the right transmission cylinder are integrally formed. Through the configuration, the driven wheel and the transmission cylinder are integrally formed, so that the process can be effectively simplified, and the number of parts can be reduced.
In a preferred embodiment of the above dual-drive power device, the left outer wheel and the right outer wheel of the differential device are coaxially disposed on a center line, and the first drive shaft is perpendicular to the center line; the second drive shaft is perpendicular to the centerline. Through the configuration, the regular arrangement of the drivers can be realized, and the subsequent assembly is facilitated.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of one embodiment of a differential apparatus of the present invention;
fig. 2 is a schematic structural view of one embodiment of the dual drive power device of the present invention.
List of reference numerals:
A. a differential device; l, a center line; 11. a left outer wheel; 12. a right outer wheel; 13. an outer planet wheel; 101. a left transmission cylinder; 102. a right transmission cylinder; 21. a left inner wheel; 22. a right inner wheel; 23. an inner planet wheel; 201. a left drive shaft; 202. a right drive shaft; 3. a planet carrier; t, a dual-drive power device; t1, first driver; t10, first drive shaft; t11, a first drive wheel; t12, a first driven wheel; t2, second driver; t20, second drive shaft; t21, a second driving wheel; t22, second driven wheel; s1, left wheel; s2, right wheel.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a differential device A, aiming at solving the technical problems of complex structure, large manufacturing difficulty, large occupied space and the like of the conventional power device. The differential device a comprises a left outer wheel 11; the right outer wheel 12, the right outer wheel 12 and the left outer wheel 11 are coaxially arranged on a central line L; the outer planet wheel 13, the outer planet wheel 13 is arranged on a planet carrier 3 and is respectively meshed with the left outer wheel 11 and the right outer wheel 12; a left inner wheel 21, the left inner wheel 21 being disposed between the left outer wheel 11 and the right outer wheel 12 and having its axis extending along the center line L; a right inner wheel 22, the right inner wheel 22 being arranged between the left and right outer wheels 11, 12 and a center line thereof extending along the center line L; and inner planetary wheels 23, the inner planetary wheels 23 being arranged on the planetary carrier 3 and being engaged with the left inner wheel 21 and the right inner wheel 22, respectively.
Fig. 1 is a schematic structural view of one embodiment of the differential device of the present invention. As shown in fig. 1, the differential device a in the embodiment of the present invention has a center line L on which the left outer wheel 11 is disposed, and the rotation axis of the left outer wheel 11 coincides with the center line L. Optionally, the left outer wheel 11 is a bevel gear. Alternatively, the left outer wheel 11 may also be of another suitable gear type. As shown in fig. 1, a left transmission cylinder 101 is provided on the left side of the left outer wheel 11, and the left transmission cylinder 101 extends leftward along a center line L, and its axis coincides with the center line L. Alternatively, the left transmission cylinder 101 is integrally formed with the left outer wheel 11. Alternatively, the left drive cylinder 101 is fixedly connected to the left outer wheel 11 by welding or other suitable process. The end surface of the left transmission cylinder 101 is circular. Alternatively, the end surface of the left transmission cylinder 101 is rectangular.
As shown in fig. 1, a right outer wheel 12 is also disposed on the center line L, and the rotational axis of the right outer wheel 12 coincides with the center line L. Alternatively, the right outer wheel 12 is the same size as the left outer wheel 11. The right outer wheel 12 and the left outer wheel 11 are symmetrically distributed on the center line L. Optionally, the right outer wheel 12 is a bevel gear, alternatively, the right outer wheel 12 may also be another suitable gear type. As shown in fig. 1, a right transmission cylinder 102 is provided on the right side of the right outer wheel 12, and the right transmission cylinder 102 extends rightward along the center line L with its axis coinciding with the center line L. Alternatively, the right transmission cylinder 102 is formed integrally with the right outer wheel 12. Alternatively, right drive cylinder 102 is fixedly attached to right outer wheel 12 by welding or other suitable process. The end surface of the right transmission cylinder 102 is circular. Alternatively, the end face of right transmission cylinder 102 is rectangular. Alternatively, the right transmission cylinder 102 is the same size as the left transmission cylinder 101.
As shown in fig. 1, the outer planetary wheels 13 are arranged between the left outer wheel 11 and the right outer wheel 12. The outer planet wheel 13 is respectively meshed with the left outer wheel 11 and the right outer wheel 12, so that the left outer wheel 11 and the right outer wheel 12 are in meshed transmission connection. Optionally, the outer planetary gear 13 is a bevel gear. Alternatively, the outer planetary wheel 13 may also be another suitable gear type. As shown in fig. 1, the outer planetary gear 13 has a plurality. Alternatively, the plurality of outer planetary gears 13 are arranged uniformly in the circumferential direction of the center line L. Alternatively, the plurality of outer planetary wheels 13 are arranged at a certain interval ratio in the circumferential direction of the center line L. As shown in fig. 1, the outer planetary gear 13 is supported by the planetary carrier 3, and the planetary carrier 3, the outer planetary gear 13, the left outer wheel 11, and the right outer wheel 12 are combined to form an outer planetary transmission structure. Wherein the outer planet wheels 13 can rotate around the planet carrier 3 and the outer planet wheels 13 can revolve around the centre line L with the planet carrier 3. Optionally, the planet carrier 3 has a centrosymmetric structure, and the symmetric axis of the planet carrier 3 is perpendicular to the central line L.
As shown in fig. 1, a left inner wheel 21 is disposed between the left outer wheel 11 and the right outer wheel 12. The axis of rotation of the left inner wheel 21 coincides with the center line L. Optionally, the left inner wheel 21 is a bevel gear. Alternatively, the left inner wheel 21 may also be of other suitable gear types. As shown in fig. 1, a left transmission shaft 201 is provided on the left side of the left inner wheel 21, the left transmission shaft 201 extends leftward along a center line L and passes through the left transmission cylinder 101, and an axis of the left transmission shaft 201 coincides with the center line L. Alternatively, the left propeller shaft 201 is integrally formed with the left inner wheel 21. Alternatively, the left drive shaft 201 is fixedly attached to the left inner wheel 21 by welding or other suitable process. The end surface of the left transmission shaft 201 is circular. Alternatively, the end face of the left drive shaft 201 is rectangular or other suitable shape.
As shown in fig. 1, a right inner wheel 22 is also disposed between the left and right outer wheels 11 and 12. The axis of rotation of the right inner wheel 22 coincides with the centerline L. Optionally, the right inner wheel 22 is a bevel gear. Alternatively, the right inner wheel 22 may also be other suitable gear types. Alternatively, the right inner wheel 22 is the same size as the left inner wheel 21. The right inner wheel 22 and the left inner wheel 21 are symmetrically distributed on the center line L. As shown in fig. 1, a right transmission shaft 202 is provided on the right side of the right inner wheel 22, the right transmission shaft 202 extends rightward along a center line L and passes through the right transmission cylinder 102, and an axis of the right transmission shaft 202 coincides with the center line L. Alternatively, the right drive shaft 202 is formed integrally with the right inner wheel 22. Alternatively, the right drive shaft 202 is fixedly connected to the right inner wheel 22 by welding or other suitable process. The end surface of the right drive shaft 202 is circular. Alternatively, the end face of the right drive shaft 202 is rectangular or other suitable shape. Optionally, the right drive shaft 202 is the same size as the left drive shaft 201.
As shown in fig. 1, the inner planetary wheels 23 are arranged between the left inner wheel 21 and the right inner wheel 22. The inner planetary wheels 23 are respectively meshed with the left inner wheel 21 and the right inner wheel 22, so that meshed transmission connection is formed between the left inner wheel 21 and the right inner wheel 22. Alternatively, the inner planetary gears 23 are bevel gears. Alternatively, the inner planetary wheels 23 may also be of other suitable gear types. As shown in fig. 1, the inner planetary gear 23 has a plurality. Alternatively, the plurality of inner planetary wheels 23 are arranged uniformly in the circumferential direction of the center line L. Alternatively, the plurality of inner planetary wheels 23 are arranged at a certain interval ratio in the circumferential direction of the center line L. As shown in fig. 1, the inner planetary gear 23 is supported by the planetary carrier 3, and the planetary carrier 3, the inner planetary gear 23, the left inner gear 21 and the right inner gear 22 form an inner planetary transmission structure in combination. Wherein the inner planet wheels 23 are able to rotate around the planet carrier 3 and the inner planet wheels 23 are able to revolve around the centre line L with the planet carrier 3.
It is easy to understand that the inner planetary transmission structure is wrapped by the outer planetary transmission structure, and the two planetary transmission structures are nested with each other, so that the differential device A in the embodiment of the invention has a compact structure and obviously reduces the occupied space. It is emphasized that in the differential apparatus a of the embodiment of the present invention, both the inner planetary gear 23 and the outer planetary gear 13 are disposed on the carrier 3, the inner planetary gear 23 can revolve in synchronization with the outer planetary gear 13, and the two-layer planetary transmission structure transmits power through the common carrier 3.
The differential device A of the embodiment of the invention can be matched with a driver to form various power devices. FIG. 2 is a schematic structural diagram of an embodiment of the dual drive power plant of the present invention. As shown in fig. 2, the dual drive power unit T in the embodiment of the present invention has a differential unit a, a first driver T1, a second driver T2, a left wheel s1, and a right wheel s 2. The type of the "driver" may be a motor or an engine. The first driver t1 and the second driver t2 may be the same type of driver or different types of drivers.
As shown in fig. 2, the first driver t1 has a first drive shaft t 10. The first drive shaft t10 is provided with a first primary pulley t 11. Alternatively, the first driver t11 is integrally formed with the first drive shaft t 10. Alternatively, the first driving pulley t11 is fixed to the first driving shaft t10 by welding, pinning or other suitable means. The first driver t11 is a bevel gear. Alternatively, the primary driver t11 may also be a spur gear or other suitable gear type. As shown in fig. 2, the left transmission cylinder 101 is provided with a first driven wheel t 12. Alternatively, the first driven pulley t12 is integrally formed with the left transmission cylinder 101. Alternatively, the first driven pulley t12 is fixed to the left transmission cylinder 101 by welding or other suitable means. It should be emphasized that when the first driven wheel t12, the left transmission cylinder 101 and the left outer wheel 11 are integrally formed, the number of parts of the device can be effectively reduced. The first driven pulley t12 is a bevel gear. Alternatively, the first driven pulley t12 may be a spur gear or other suitable gear type. The first driving pulley t11 is in meshing engagement with the first driven pulley t12, so that the power of the first driver t1 is input from the left transmission cylinder 101.
It is easy to understand that when the first driving wheel t11 and the first driven wheel t12 are both bevel gears, the angular relationship between the first driving shaft t10 and the center line L can be adjusted by adjusting the taper angle relationship between the first driving wheel t11 and the first driven wheel t12, so that the arrangement position of the first driver t1 can be flexibly adjusted. Alternatively, the first drive shaft t10 is perpendicular to the centerline L. Alternatively, the first drive shaft t10 is at an angle of 100 degrees, 60 degrees, or other suitable angle with the centerline L.
As shown in fig. 2, the second driver t2 has a second drive shaft t 20. The second drive shaft t20 is provided with a second primary pulley t 21. Alternatively, the second driving pulley t21 is integrally formed with the second driving shaft t 20. Alternatively, the second drive pulley t21 is fixed to the second drive shaft t20 by welding, pinning or other suitable means. The second driver t21 is a bevel gear. Alternatively, the secondary drive pulley t21 may also be a spur gear or other suitable gear type. As shown in fig. 2, a second driven pulley t22 is provided on the right transmission cylinder 102. Alternatively, the second driven pulley t22 is integrally formed with the right transmission cylinder 102. Alternatively, the second driven pulley t22 is fixed to the right transmission cylinder 102 by welding or other suitable means. It should be emphasized that when the second driven wheel t22, the right transmission cylinder 102 and the right outer wheel 12 are integrally formed, the number of parts of the device can be effectively reduced. The second driven pulley t22 is a bevel gear. Alternatively, the second driven pulley t22 may be a spur gear or other suitable gear type. The secondary driving pulley t21 is in meshing connection with the secondary driven pulley t22, so that the power of the secondary driver t2 is input from the right transmission cylinder 102.
It is easily understood that, when the second driving pulley t21 and the second driven pulley t22 are both bevel gears, the angular relationship between the second driving shaft t20 and the center line L can be adjusted by adjusting the taper angle relationship between the second driving pulley t21 and the second driven pulley t22, so as to flexibly adjust the arrangement position of the second driver t 2. Alternatively, the second driving shaft t20 is symmetrical to the first driving shaft t10 with respect to the normal line of the center line L. Alternatively, the second drive shaft t20 is perpendicular to the centerline L. Alternatively, the second drive shaft t20 is at an angle of 100 degrees, 60 degrees, or other suitable angle with the centerline L.
As shown in fig. 2, the power of the first driver t1 is input from the left driving cylinder 101 of the differential device a, and the power of the second driver t2 is input from the right driving cylinder 102 of the differential device a; two power beams are coupled by an outer planet wheel 13 and then output from the planet carrier 3; the planet carrier 3 rotates around the central line L to drive the inner planet wheel 23 to revolve, the inner planet wheel 23 drives the left inner wheel 21 and the right inner wheel 22 to rotate, and then power is output from the left transmission shaft 201 and the right transmission shaft 202; as shown in fig. 2, the left wheel s1 is connected with the left transmission shaft 201, the right wheel s2 is connected with the right transmission shaft 202, and the power output by the transmission shafts drives the wheels to rotate.
In the dual-drive power device T provided by the embodiment of the invention, the two small torque drivers are used for replacing the traditional large torque driver, and the manufacturing difficulty of the drivers can be effectively reduced under the condition of providing the same power. The differential device A of the embodiment of the invention has the advantages of compact structure, space saving and easy arrangement, and can further simplify the structure of the dual-drive power device T, lighten the weight of the whole device and reduce the cost of the device.
It is worth emphasizing that the power of the two drivers is coupled together through the outer layer planetary transmission structure and then output through the planet carrier 3, and the outer layer planetary transmission structure can automatically balance the speed difference between the two drivers, so that the two drivers can have different rotating speeds, and the two drivers do not need to be accurately matched during operation, thereby effectively reducing the requirement on the control algorithm of the drivers. Because two drivers in the device can have speed difference, the selection of the two drivers and the high-efficiency working area can be relatively independent, and in the actual operation process, the two drivers can be maintained in the respective high-efficiency working areas, so that the overall performance is improved. In addition, power is output from the two transmission shafts after being transmitted by the inner-layer planetary transmission structure, the inner-layer planetary transmission structure can automatically balance the speed difference between the two transmission shafts, and the wheels on two sides can have the speed difference in the steering driving process of the vehicle.
It is easily conceived that in other dual-drive power devices in which the differential apparatus a according to the embodiment of the present invention is formed by cooperating with the drivers, the first driver t1 and the second driver t2 can also input power from the left outer wheel 11 and the right outer wheel 12 respectively through different gear sets, transmission belts or other suitable transmission structures, and accordingly, the left transmission cylinder 101 and the right transmission cylinder 102 connected to the left outer wheel 11 and the right outer wheel 12 respectively can be omitted to further simplify the structure.
It is easily understood that in some dual-drive power devices formed by the differential device a of the embodiment of the present invention cooperating with the drivers, the first driver t1 and the second driver t2 may also be connected to the left inner wheel 21 and the right inner wheel 22, respectively, so as to input power from the left inner wheel 21 and the right inner wheel 22, respectively; at the moment, the inner-layer planetary transmission structure automatically balances the speed difference between the two drivers, and outputs the power to the outer-layer planetary transmission structure through the planet carrier 3 after coupling; the outer planetary transmission structure outputs power from the left outer wheel 11 and the right outer wheel 12, and accordingly, the left wheel s1 and the right wheel s2 are connected with the left outer wheel 11 and the right outer wheel 12, respectively. At this time, the outer layer planetary transmission structure has the function of automatically balancing the speed difference of the two wheels.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A differential device, characterized in that it comprises:
a left outer wheel;
the right outer wheel and the left outer wheel are coaxially arranged on a central line;
the outer planet wheel is arranged on a planet carrier and is respectively in meshed connection with the left outer wheel and the right outer wheel;
a left inner wheel disposed between the left and right outer wheels and having an axis extending along the centerline;
a right inner wheel disposed between the left and right outer wheels and having a centerline extending along the centerline; and
the inner planet wheel is arranged on the planet carrier and is respectively meshed with the left inner wheel and the right inner wheel.
2. The differential apparatus of claim 1 wherein the outer planet wheels are plural, the outer planet wheels being arranged circumferentially about the centerline; the inner planetary wheel is provided with a plurality of inner planetary wheels which are arranged along the circumferential direction of the center line.
3. The differential device of claim 2 wherein the left outer wheel, the right outer wheel, the outer planet wheels, the left inner wheel, the right inner wheel, and the inner planet wheels are all bevel gears.
4. The differential device according to claim 1 wherein a left drive shaft is connected to the left inner wheel, and a left drive cylinder fitted around the left drive shaft is connected to the left outer wheel; the right inner wheel is connected with a right transmission shaft, and the right outer wheel is connected with a right transmission cylinder which is sleeved outside the right transmission shaft.
5. A dual drive power plant, characterized in that it comprises:
a differential device according to any one of claims 1-3;
a first driver, power of which is input from a left inner wheel of the differential device;
a second driver, power of which is input from a right inner wheel of the differential device;
a left wheel connected to a left outer wheel of the differential device; and
a right wheel connected with a right outer wheel of the differential device.
6. A dual drive power plant, characterized in that it comprises:
a differential device according to any one of claims 1-3;
a first driver, power of which is input from a left outer wheel of the differential device;
a second driver, power of which is input from a right outer wheel of the differential device;
a left wheel connected with a left inner wheel of the differential device; and
and the right wheel is connected with the right inner wheel of the differential device.
7. A dual drive power plant, characterized in that it comprises:
the differential device of claim 4;
a first driver, the power of which is input from a left transmission cylinder of the differential device;
a second driver, the power of which is input from a right transmission cylinder of the differential device;
a left wheel connected with a left drive shaft of the differential device; and
and the right wheel is connected with a right transmission shaft of the differential device.
8. A dual drive power device according to claim 7, wherein said first driver has a first drive shaft, a first drive wheel is provided on said first drive shaft, a first driven wheel is provided on said left transmission cylinder, and said first driven wheel is engaged with said first drive wheel; the second driver is provided with a second driving shaft, a second driving wheel is arranged on the second driving shaft, a second driven wheel is arranged on the right transmission cylinder, and the second driven wheel is meshed with the second driving wheel.
9. A dual drive power plant according to claim 8, characterised in that said first driven wheel is formed integrally with said left drive cylinder; the second driven wheel and the right transmission cylinder are integrally formed.
10. A dual drive power plant according to claim 8, wherein said left and right outer wheels of said differential gear are coaxially disposed on a centerline, said first drive shaft being perpendicular to said centerline, said second drive shaft being perpendicular to said centerline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210536957.2A CN114719004A (en) | 2022-05-18 | 2022-05-18 | Differential device and dual-drive power device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210536957.2A CN114719004A (en) | 2022-05-18 | 2022-05-18 | Differential device and dual-drive power device |
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| CN114719004A true CN114719004A (en) | 2022-07-08 |
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| CN202210536957.2A Withdrawn CN114719004A (en) | 2022-05-18 | 2022-05-18 | Differential device and dual-drive power device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787116A (en) * | 2015-04-16 | 2015-07-22 | 湖南农业大学 | Direct-movement locking type drive axle used for vehicle with left and right crawler belts rotating forward and backward |
| CN107082016A (en) * | 2016-02-16 | 2017-08-22 | 北京汽车动力总成有限公司 | A kind of continuous variable transmission assembly and automobile |
| US20180304744A1 (en) * | 2017-04-21 | 2018-10-25 | Jilin University | Dual-motor coupling drive axle with torque vectoring function |
| CN208252724U (en) * | 2018-04-26 | 2018-12-18 | 徐工集团工程机械有限公司 | A kind of vehicle main drive gear |
| CN109606023A (en) * | 2018-11-28 | 2019-04-12 | 江苏大学 | A kind of double-motor hybrid drive axle and its control method |
-
2022
- 2022-05-18 CN CN202210536957.2A patent/CN114719004A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787116A (en) * | 2015-04-16 | 2015-07-22 | 湖南农业大学 | Direct-movement locking type drive axle used for vehicle with left and right crawler belts rotating forward and backward |
| CN107082016A (en) * | 2016-02-16 | 2017-08-22 | 北京汽车动力总成有限公司 | A kind of continuous variable transmission assembly and automobile |
| US20180304744A1 (en) * | 2017-04-21 | 2018-10-25 | Jilin University | Dual-motor coupling drive axle with torque vectoring function |
| CN208252724U (en) * | 2018-04-26 | 2018-12-18 | 徐工集团工程机械有限公司 | A kind of vehicle main drive gear |
| CN109606023A (en) * | 2018-11-28 | 2019-04-12 | 江苏大学 | A kind of double-motor hybrid drive axle and its control method |
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