CN115342169A

CN115342169A - Differential stepless variable-torque transmission

Info

Publication number: CN115342169A
Application number: CN202211087198.2A
Authority: CN
Inventors: 金春磊; 谭万喜
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2022-11-15

Abstract

The invention discloses a differential stepless torque-variable transmission, and belongs to the technical field of transmissions. The device comprises a shell, a differential frame, a differential gear, a torque-increasing input component, a planet carrier, a planetary gear and a power output component; the differential frame, the torque-increasing input component and the output component are coaxially arranged, and the torque-increasing input component and the output component sequentially penetrate through the center of the planet carrier and are rotationally connected with the planet carrier; the differential gear is meshed with the torque-increasing input component and the planet carrier oppositely; the planet gear is rotationally connected with the planet carrier through a rotating shaft; the invention is completely rigidly engaged by gears, has no easily damaged parts, simple structure, small volume, low cost, long service life and safe and reliable mechanical automatic control; the invention has rigid stepless torque-changing and speed-changing functions, and combines stepless linear acceleration of a rigid transmission CVT of a manual gear into a whole.

Description

Differential stepless torque-changing speed variator

Technical Field

The invention relates to a differential stepless torque-converting transmission, belonging to the technical field of transmissions.

Background

AT present, the international general mainstream speed changers of motor vehicles comprise manual speed changers, double-clutch speed changers, AT speed changers and CVT speed changers. The manual gearbox has frequent gear shifting, tedious and tiring operation and poor traveling experience; the friction part of the double-clutch gearbox is easy to heat, gear shifting is stopped, the structure is complex, and the cost is high; the AT gearbox has a complex structure and high cost, and also has the problems of high oil consumption, slow power and pause; CVT has the inherent defects of limited torque peak value and incapability of starting. The invention provides a differential stepless torque-variable transmission which has a simple structure and combines the rigid torque-variable transmission advantage of a manual gear and the stepless speed change advantage of a CVT into a whole.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the differential stepless torque-variable transmission solves the problems that a traditional transmission is easy to strain, break, slip, generate heat, high in cost and incapable of being applied by an electric vehicle.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

differential stepless torque-variable transmission, including shell, differential frame, transmission shaft, planet carrier and output shaft, the differential frame is located the inside rotation setting of shell, the transmission shaft is located the axle center position of differential frame, the planet carrier rotates and cup joints on the transmission shaft, it has first transmission gear still to fix the cover on the transmission shaft, it has a plurality of differential gears, and is a plurality of to mesh jointly between first transmission gear and the planet carrier differential gear all rotates with the differential frame through adjustable eccentric shaft and is connected, it is connected with a plurality of planet wheels to rotate on the planet carrier, the transmission shaft passes through planet wheel and output shaft for turn round output power.

As a preferable example, the differential gear is provided with two-stage meshing surfaces, one of which meshes with the first transmission gear and the other of which meshes with the carrier.

As a preferable example, the differential gears are provided with at least three and are evenly distributed on the differential frame.

As a preferable example, the transmission shaft and the output shaft are coaxially arranged, the bottom of the transmission shaft is fixedly sleeved with a second transmission gear, and the upper part of the output shaft is fixedly sleeved with a third transmission gear.

As a preferable example, the planet gear is a double-row gear with different diameters, wherein one row of gears is meshed with the second transmission gear, and the other row of gears is meshed with the third transmission gear.

As a preferable example, the adjustable eccentric shaft comprises a supporting shaft and an adjusting shaft, the differential gear is sleeved with the supporting shaft in a concentric rotation mode, the adjusting shaft is sleeved with the supporting shaft in an eccentric rotation mode, and the adjusting shaft is connected with the differential frame.

The invention has the beneficial effects that: the invention can provide stepless torque-variable acceleration with large torque upper limit, has rigid stepless torque-variable speed-change function, combines the stepless linear acceleration of the rigid transmission CVT of the manual gear into a whole, basically can unify the gearbox, and can further solve the defect of motor high rotating speed hypodynamia when the electric vehicle is at high speed.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 isbase:Sub>A schematic cross-sectional view taken along the line A-A in FIG. 1;

fig. 3 is an exploded structure schematic diagram of a planet wheel part;

fig. 4 is a schematic structural diagram of the differential gear in different eccentric states.

In the figure: the device comprises a shell 1, a support frame 2, a planet wheel 3, a planet carrier 4, a differential gear 5, a first meshing surface 51, a second meshing surface 52, a differential frame 6, a first transmission gear 7, a transmission shaft 8, a second transmission gear 9, a third transmission gear 10, an output shaft 11, a support shaft 12 and an adjusting shaft 13.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.

As shown in fig. 1-4, the differential stepless torque-variable transmission comprises a housing 1, a differential frame 6, a transmission shaft 8, a planet carrier 4 and an output shaft 11, wherein the differential frame 6 is rotatably arranged inside the housing 1, an input shaft is fixed at the axle center part of the differential frame 6, and the input shaft extends to the outside of the housing 1 to be used as a power input component; the transmission shaft 8 is also arranged at the axle center position of the differential frame 6, corresponds to the input shaft and is used for keeping balance during movement; planet carrier 4 rotates and cup joints on transmission shaft 8, it has first transmission gear 7 still to fix the cover on transmission shaft 8 and has cup jointed jointly between first transmission gear 7 and the planet carrier 4, a plurality of differential gears 5 all rotate with differential carrier 6 through adjustable eccentric shaft and are connected, it is connected with a plurality of planet wheel 3 to rotate on the planet carrier 4, planet wheel 3 is located planet carrier 4's both sides respectively with first transmission gear 7, form two kinds of power transmission structures, one kind by differential carrier 6, differential gear 5 and planet carrier 4 constitute the differential transmission structure, another kind is by planet carrier 4, planet wheel 3 constitutes the planetary transmission structure, transmission shaft 8 is connected with output shaft 11 through planet wheel 3, by the outside output power of output shaft 11 at last, be used for realizing the change and turn round output power.

In a particular embodiment, the differential gear 5 is provided with two meshing surfaces: a first meshing surface 51 and a second meshing surface 52, the two meshing surfaces having different diameters, wherein the first meshing surface 51 meshes with the first transmission gear 7, and the second meshing surface 52 meshes with gear teeth provided on the outer periphery of the carrier 4, when power is input through the differential gear 5, since the speed ratio of the carrier 4 is 1:1, and the torque-up speed ratio can usually reach 1, even 1, 5, the differential gear 5 can automatically transmit power to the torque-up end, so when the locomotive starts, the planet carrier 4 is relatively static, the power is transmitted by the differential gear 5 in linkage with the torque-up input component (the torque-up input component is composed of the first transmission gear 7, the transmission shaft 8 and the second transmission gear 9), and according to the normal differential speed, the rotation speed of the torque-up input component is 2 times of the revolution of the differential gear 5, and the torque is halved. Therefore, the gears of the differential gear 5 are divided into two stages, and the first meshing surface 51: the gear ratio of the first drive wheel 7 is defined as the second meshing surface 52: half of the gear ratio of the planet carrier 4 can be solved, so that the input effect of the torque increasing end is ensured.

The three differential gears 5 are uniformly distributed on the differential frame 6, and the three or more differential gears 5 basically do not generate radial force on the connecting bearing, so that the equipment is more durable.

The transmission shaft 8 and the output shaft 11 are coaxially arranged, the bottom of the transmission shaft 8 is fixedly sleeved with a second transmission gear 9, and the upper part of the output shaft 11 is fixedly sleeved with a third transmission gear 10; planet wheel 3 is the double gear that the diameter is different, one of them row gear and second drive gear 9 meshing, another row gear and third drive gear 10 meshing, through the meshing transmission between the different gear trains, the effect of change moment of torsion is realized, stability when in order to strengthen planet wheel 3 rotatory, it has second layer planet carrier 2 still to rotate the cover to connect on the output shaft 11, the top and the planet wheel 3 of this planet carrier 2 are connected, support the meshing of planet wheel 3 and drive gear with planet carrier 4 jointly, the stability that keeps entire system.

The purpose of the stepless speed changer is constant torque output from the maximum speed ratio and the maximum torque when the first gear starts to transition to the minimum speed ratio and the minimum torque of the fifth gear or the sixth gear without a step difference. Under the normal differential condition, due to the torque increasing effect, if the output of the two ends of the differential gear 5 is the same, the power is more inclined to be transmitted from the direction of the torque increasing input component of the first transmission gear 7, the transmission shaft 8 and the second transmission gear 9 with low resistance, the linkage differential gear 5 is meshed with the third transmission gear 10 and is output by the output shaft 11, the low-resistance output is maintained, and although the planet carrier 4 can synchronously rise along with the rotating speed of the output shaft 11, the torque changing effect is not obvious. In order to solve the mutual conversion of the torque conversion and the constant moment, an adjustable eccentric shaft is specially designed on a differential gear 5, the adjustable eccentric shaft comprises a supporting shaft 12 and an adjusting shaft 13, the differential gear 5 and the supporting shaft 12 are in concentric rotary sleeve joint, the adjusting shaft 13 and the supporting shaft 12 are in eccentric rotary sleeve joint, the supporting shaft 12 is not connected with a differential frame 6, the adjusting shaft 13 is connected with the differential frame 6 and is adjusted by a locomotive computer, in one specific embodiment, the inner wall of a shell 1 is provided with an annular guide rail, one end of the adjusting shaft 13 penetrates through the differential frame 6 and is provided with a bearing, the bearing rolls in the guide rail, and meanwhile, the shell 1 is provided with a driving structure, such as an electric cylinder, for driving the guide rail to integrally ascend or descend; the differential wheel 5 revolves by being driven by the differential frame 6, the guide rail is finely adjusted up and down, the differential wheel 5 is driven by the adjusting shaft 13 to be in eccentric transmission, and the control part of the locomotive computer is not the key point of protection of the application, and the redundant description is not repeated. At the beginning of acceleration, the adjusting shaft 13 is positioned at the middle position, the force arms at two ends of the differential gear 5 are the same, and because the resistance in the direction of the planet carrier 4 is greater than that of the first transmission gear 7, the torque-increasing output is realized at the moment, namely the planet carrier 4 is immobilized, the differential gear 5 rolls on the planet carrier 4, and the torque-increasing input component is pushed to accelerate the torque-increasing; when a certain speed exists, the adjusting shaft 13 gradually presses to the end of the planet carrier 4 under the instruction of a locomotive computer, the position of the differential gear 5 is not moved, the ratio of the force arm of the differential gear 5 in the direction of the first transmission gear 7 to the force arm of the differential gear 4 is larger and larger, the ratio of the stress of the corresponding first transmission gear 7 to the stress of the planet carrier 4 is smaller and smaller, namely, the power gradually deviates to the constant-moment transmission in the direction of the planet carrier 4, until the resistance at the two ends of the gear of the differential gear 5 is the same, the differential gear 5 does not roll and rotate any more, and the constant-moment transmission is realized.

The working principle is as follows: the engine power enters from a differential carrier 6 and is divided into two torques by a differential gear 5: firstly, the differential gear 5 is meshed with the first transmission gear 7, the transmission shaft 8 is used for increasing the torque of an output part and outputting the torque through the second transmission gear 9, the planet gear 3 and the third transmission gear 10; secondly, the planet carrier 4 is engaged with the differential gear 5, and the planet carrier 4 drives the constant torque output of the output component through the planet gear 3 and the third transmission gear 10. The torque increasing and the constant torque coexist, can be mutually converted at any time, and have no fixed ratio.

When the motor vehicle starts, a great torque needs to be exploded to obtain the maximum starting acceleration, at the moment, the first transmission gear 7 is pushed to be linked with the transmission shaft 8 and the second transmission gear 9 to be meshed with the planet gear 3 mainly by rolling the differential gear 5 on the planet carrier 4, and then the third transmission gear 10 and the output shaft 11 are linked, so that the torque is increased, and the planet carrier 4 rotates along with the rotating speed of the output part.

The eccentric shaft of the differential gear 5 is controlled by the locomotive computer, and can automatically move along with the increase of the speed. When the speed of the motor vehicle is gradually increased, the eccentric shaft of the differential gear 5 is gradually pressed to one side of the planet carrier 4, the torque increasing output is gradually reduced, the constant torque output is gradually increased until the two ends of the differential gear 5 are balanced and become constant torque output, and the torque-changing and speed-changing are finished. The invention is completely engaged by the gear rigid, has no wearing parts, simple structure, small volume, low cost, long service life and safe and reliable mechanical automatic control.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The differential stepless torque-variable transmission is characterized in that: including shell (1), differential frame (6), transmission shaft (8), planet carrier (4) and output shaft (11), differential frame (6) are located shell (1) inside rotation and set up, transmission shaft (8) are located the axle center position of differential frame (6), planet carrier (4) are rotated and are cup jointed on transmission shaft (8), it has first transmission gear (7) still to fix the cup joint on transmission shaft (8), it has a plurality of differential gear (5), a plurality of to mesh jointly between first transmission gear (7) and planet carrier (4) differential gear (5) all rotate with differential frame (6) through adjustable eccentric shaft and are connected, it is connected with a plurality of planet wheel (3) to rotate on planet carrier (4), transmission shaft (8) are connected with output shaft (11) through planet wheel (3) for the change turns round output power.

2. The differential continuously variable torque transmission of claim 1 wherein: the differential gear (5) is provided with two-stage meshing surfaces, wherein one meshing surface is meshed with the first transmission gear (7), and the other meshing surface is meshed with the planet carrier (4).

3. The differential continuously variable torque transmission of claim 2, wherein: the number of the differential gears (5) is at least three, and the differential gears are uniformly distributed on the differential frame (6).

4. The differential continuously variable torque transmission of claim 1, wherein: the transmission shaft (8) and the output shaft (11) are coaxially arranged, a second transmission gear (9) is fixedly sleeved at the bottom of the transmission shaft (8), and a third transmission gear (10) is fixedly sleeved at the upper part of the output shaft (11).

5. The differential continuously variable torque transmission of claim 4, wherein: the planet gear (3) is a double-row gear with different diameters, wherein one row of gears is meshed with the second transmission gear (9), and the other row of gears is meshed with the third transmission gear (10).

6. The differential continuously variable torque transmission of claim 1 wherein: the adjustable eccentric shaft comprises a supporting shaft (12) and an adjusting shaft (13), the differential gear (5) is rotatably sleeved with the supporting shaft (12) in a concentric circle, the adjusting shaft (13) is rotatably sleeved with the supporting shaft (12) in a eccentric circle, and the adjusting shaft (13) is connected with the differential frame (6).