CN115853979A - Single-side input and output four-planet-row stepless speed change mechanism and speed change method thereof - Google Patents
Single-side input and output four-planet-row stepless speed change mechanism and speed change method thereof Download PDFInfo
- Publication number
- CN115853979A CN115853979A CN202111113079.5A CN202111113079A CN115853979A CN 115853979 A CN115853979 A CN 115853979A CN 202111113079 A CN202111113079 A CN 202111113079A CN 115853979 A CN115853979 A CN 115853979A
- Authority
- CN
- China
- Prior art keywords
- speed
- gear
- planet
- output
- row
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a single-side input and output four-planet-row stepless speed change mechanism and a speed change method thereof, belonging to the technical field of stepless speed changers. According to the single-side input and output four-planet-row stepless speed change mechanism, the connecting ends of the first driving piece, the second driving piece and the output part are all arranged at one end of the stepless speed change mechanism, so that power is input and output at one end of the stepless speed change mechanism, and further the whole power equipment is more reasonable in arrangement and space utilization rate.
Description
Technical Field
The invention relates to the technical field of continuously variable transmissions, in particular to a single-side input and output four-planet-row continuously variable transmission mechanism and a speed change method thereof.
Background
With the higher and higher requirements of the society on environmental protection, the electric vehicle technology becomes the mainstream research direction of each large vehicle enterprise. At present, the electric vehicle mostly adopts a speed reducer with a fixed speed ratio, although the speed reducer with a large speed ratio can be selected to meet the power requirement when the vehicle starts and climbs, the large speed ratio limits the vehicle to be incapable of reaching a high maximum speed, and the reason that the maximum speed of the electric vehicle is generally lower than the maximum speed of a fuel vehicle on the market is also provided. In order to take account of the highest speed and the climbing capability of a vehicle, a plurality of vehicle enterprises begin to install AMT transmissions on electric vehicles, but the AMT transmissions belong to step-by-step speed change in principle, and have the problems of gear shifting, gear shifting and power interruption in the prior art; the transmission ratio range of the AMT is limited by gear setting and is applied to heavy vehicles, in order to expand the transmission ratio range, a large number of gears need to be set, the gear shifting process is slow, the operation is complex, and a lot of drivers of large vehicles are reluctant to step on the brake; the AMT gear shifting process depends on a complex control strategy, the accurate gear shifting time is difficult to master, and the problems of high energy consumption and low efficiency exist; the AMT transmission has the disadvantages of complex structure, high manufacturing cost and difficult maintenance.
Disclosure of Invention
The invention aims to solve the problems and designs a single-side input and output four-planet-row stepless speed change mechanism and a speed change method thereof.
The technical scheme of the invention is that the single-side input and output four-planet-row stepless speed change mechanism comprises a first planet row, a second planet row, a third planet row and a fourth planet row, wherein a first gear ring on the first planet row is connected with a second sun gear on the second planet row through a first connecting shaft, a second gear ring on the second planet row is connected with a third planet carrier on the third planet row, a third planet carrier on the third planet row is connected with a fourth sun gear on the fourth planet row through a second connecting shaft, and a fourth planet carrier on the fourth planet row is connected with an output component, the first planet carrier on the first planet row, the second planet carrier on the second planet row, the third gear ring on the third planet row and the fourth gear ring on the fourth planet row are all connected to a connector with the same rotating speed, a one-way stopper is arranged on the connector with the same rotating speed, the third sun gear on the third planet row penetrates through the third planet carrier, the second connecting shaft, the fourth sun gear, the fourth planet carrier and the output part through a second input shaft and is connected with a second driving piece, and the first sun gear on the first planet row penetrates through the first connecting shaft, the second sun gear, the third sun gear, the second input shaft and the second driving piece through a first input shaft and is connected with the first driving piece.
As a further description of the present invention, the first connecting shaft, the second sun gear, the third planet carrier, the second connecting shaft, the fourth sun gear, the fourth planet carrier, the output member, and the second input shaft are all hollow penetrating structures.
As a further explanation of the present invention, the one-way stopper serves to limit the rotational directions of the first carrier, the second carrier, the third ring gear, and the fourth ring gear.
The invention also provides a speed change method of the four-planet-row stepless speed change mechanism based on single-side input and output, wherein a first driving piece and a first sun gear are connected through a first input shaft, so that the rotating speed of the first driving piece is the same as that of the first sun gear; the second driving piece and the third sun gear are connected through a second input shaft, so that the rotating speed of the second driving piece is the same as that of the third sun gear; the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring are all connected to a connector with the same rotating speed, so that the rotating speeds of the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring are the same; the first gear ring and the second sun gear are connected through a first connecting shaft, so that the rotating speed of the first gear ring is the same as that of the second sun gear; the second gear ring is connected with a third planet carrier, and the third planet carrier is connected with a fourth sun gear through a second connecting shaft, so that the rotating speed of the second gear ring, the rotating speed of the third planet carrier and the rotating speed of the fourth sun gear are the same; the fourth planet carrier is connected with the output component, so that the rotating speed of the fourth planet carrier is the same as that of the output component.
As a further explanation of the invention, it is assumed that: the rotating speed of the first driving piece and the rotating speed of the first sun gear are N 1 The rotating speed of the second driving piece and the rotating speed of the third sun wheel are N 2 The rotation speed of the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring is N 3 The rotation speed of the first gear ring and the rotation speed of the second sun gear are N 4 The rotation speed of the second gear ring, the third planet carrier and the fourth sun gear is N 5 The rotation speed of the fourth planet carrier and the output part is N 6 (ii) a When said N is 1 、N 2 、N 3 、N 4 、N 5 、N 6 When any two values are determined, the other four values can be calculated through the proportional relation of line segments in the vector diagram, and the rotating speed N of the first driving part is adjusted and controlled 1 And the rotational speed N of the second drive member 2 The rotational speed N of the output member can be realized 6 In which the rotational speed N of the first carrier, the second carrier, the third ring gear and the fourth ring gear is caused to vary continuously, wherein 3 When the rotation speed is 0, the rotation speed N of the first driving part is set 1 And the rotational speed N of the second drive member 2 The ratio of (A) to (B) is P; controlling the rotation speed N of the first driving part by adjusting 1 And the rotational speed N of the second drive member 2 The output states of the output means are made to include a state a, a state B, a state C, a state D, and a state E.
As a further explanation of the present invention, in the state a, the rotation speed N of the first carrier, the second carrier, the third ring gear and the fourth ring gear 3 Is 0, the rotating speed N of the first driving part 1 And the rotational speed N of the second drive member 2 Is P, the steering is positive, so that the rotating speed N of the output part 6 The direction of rotation of (c) is forward, and the transmission ratio is at a maximum.
As a further explanation of the invention, in said state B,rotational speed N of the first carrier, the second carrier, the third gear ring, and the fourth gear ring 3 The rotation direction is the forward direction instead of 0, and the rotation speed N of the first driving part 1 And the rotational speed N of the second drive member 2 Is less than P, the rotation directions are positive directions, so that the rotating speed N of the output part is 6 The direction of rotation of (c) is the forward direction.
As a further explanation of the present invention, in the state C, the rotation speeds N of the first carrier, the second carrier, the third ring gear, and the fourth ring gear 3 The rotation direction is reverse instead of 0, and the rotation speed N of the first driving part 1 And the rotational speed N of the second drive member 2 Is greater than P, the rotation direction is positive, and the rotation speed N of the output part is the same 6 In order to avoid a rotational speed N of said output member 6 Is arranged on the same rotational speed connecting body connected with the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring, and a one-way stopper is arranged on the same rotational speed connecting body connected with the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring and used for limiting the rotational speed N of the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring 3 Can only be in a forward direction but not in a reverse direction, so that the rotating speed N of the output part is enabled 6 The direction of turning of (1) is always positive.
As a further elaboration of the invention, in state D the rotational speed N of the first drive element 1 And the rotational speed N of the second drive member 2 Is 1, the rotation directions are positive directions, so that the rotation speed N of the output part is 6 And the rotating speed N of the first driving part 1 And the rotational speed N of the second drive member 2 Is equal in size, the steering is positive, and the transmission ratio is 1.
As a further elaboration of the invention, in state E the rotational speed N of the first drive element is 1 And the rotational speed N of the second drive member 2 Is less than 1, the rotation directions are positive directions, so that the rotating speed N of the output part is 6 Is greater than the rotating speed N of the first driving part 1 And the rotational speed N of the second drive member 2 The direction of rotation is the forward direction.
As a further explanation of the invention, the rotational speed of the second drive member is N when the first drive member fails 2 And the rotation speed N of the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring is positive 3 The reverse rotation trend is existed, and the one-way stopper limits the reverse rotation to make the rotating speed N of the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring 3 Is 0, the rotational speed N of the output member 6 And the power of the second driving piece is output through the third planetary row and the fourth planetary row in a speed reduction and torque increase mode in the forward direction.
As a further explanation of the invention, the rotational speed of the first drive member is N when the second drive member fails 1 And the rotation speed N of the first planet carrier, the second planet carrier, the third gear ring and the fourth gear ring is positive 3 There is a tendency of reverse rotation, in which a one-way stopper limits the reverse rotation to a rotation speed N of the first carrier, the second carrier, the third ring gear and the fourth ring gear 3 Is 0, the rotational speed N of the output member 6 The power of the first driving piece is output through the first planet row, the second planet row and the fourth planet row in a speed reducing and torque increasing mode.
The invention provides a single-side input and output four-planet-row stepless speed change mechanism and a speed change method thereof, which change the transmission ratio between an input end and an output end by adjusting the rotating speeds of a first driving piece and a second driving piece and by matching the first planet row, the second planet row, a third planet row, a fourth planet row and a one-way stopper, and realize the stepless speed change of the output end. In addition, all set up the link of first driving piece, second driving piece and output unit in this continuously variable transmission's one end, make the input and the output of power all in continuously variable transmission's one end, and first input shaft passes second input shaft and second driving piece and is connected with first driving piece, and the utilization ratio in promotion space that such design can be very big makes whole power equipment more reasonable in arranging and space utilization.
Drawings
FIG. 1 is a schematic diagram of a single-side input and output four-planet-row continuously variable transmission mechanism according to an embodiment of the present invention;
FIG. 2 is a tachometric vector diagram for a first, second, third, and fourth planetary gear set in accordance with an embodiment of the present invention;
FIG. 3 is a diagram of a rotation speed vector for combining a first planetary row, a second planetary row, a third planetary row and a fourth planetary row according to an embodiment of the present invention;
FIG. 4 shows the rotational speed N of the first driving member according to an embodiment of the present invention 1 And the rotational speed N of the second drive member 2 When the ratio of (A) to (B) is less than P, a rotating speed vector diagram;
FIG. 5 shows the rotational speed N of the first driving member according to an embodiment of the present invention 1 And the rotational speed N of the second drive member 2 When the ratio of the rotation speed to the rotation speed is larger than P, a vector diagram of the rotation speed is obtained;
FIG. 6 shows the rotational speed N of the first driving member according to an embodiment of the present invention 1 And the rotational speed N of the second drive member 2 A rotation speed vector diagram when the ratio of (a) is equal to 1;
FIG. 7 shows the rotational speed N of the first driving member according to an embodiment of the present invention 1 And the rotational speed N of the second drive member 2 The ratio of (a) to (b) is less than 1, and the rotation directions are all positive rotation speed vector diagrams;
FIG. 8 shows the rotational speed N of the first driving member according to an embodiment of the present invention 1 The rotational speed N of the second drive member is adjusted without change 2 A large-hour rotating speed vector diagram;
FIG. 9 shows the rotational speed N of the second driving member according to an embodiment of the present invention 2 The rotating speed N of the first driving part is adjusted without changing 1 A large-hour rotating speed vector diagram;
FIG. 10 shows the rotational speed N of the second drive member when the first drive member fails according to an embodiment of the present invention 2 A rotating speed vector diagram when the steering direction is the forward direction;
FIG. 11 illustrates an embodiment of the present invention when the second driving member is engagedRotational speed N of the first drive member in the event of failure 1 A rotating speed vector diagram when the steering direction is the forward direction;
FIG. 12 shows the rotational speed N of the first driving member according to an embodiment of the present invention 1 And the rotational speed N of the second drive member 2 Is equal to P and the rotation is in reverse direction.
Reference numerals:
1-first planet row, 101-first sun gear, 102-first planet carrier, 103-first ring gear, 2-second planet row, 201-second sun gear, 202-second planet carrier, 203-second ring gear, 3-third planet row, 301-third sun gear, 302-third planet carrier, 303-third ring gear, 4-fourth planet row, 401-fourth sun gear, 402-fourth planet carrier, 403-fourth ring gear, 5-first input shaft, 6-second input shaft, 7-first connecting shaft, 8-second connecting shaft, 9-output member, 10-one-way stopper.
Detailed Description
Firstly, the purpose of the embodiment of the invention is explained, and the problem that the AMT has gear shifting pause and power interruption in the nature is solved; the transmission ratio range of the AMT is limited by gear setting and is applied to heavy vehicles, in order to expand the transmission ratio range, a large number of gears need to be set, the gear shifting process is slow, the operation is complex, and a large number of reasons that drivers of large vehicles do not want to step on the brake are caused; the AMT gear shifting process depends on a complex control strategy, the accurate gear shifting time is difficult to master, and the problems of high energy consumption and low efficiency exist; the AMT transmission has the existing problems of complex structure, high manufacturing cost, difficult maintenance and the like, so a four-planet-row stepless speed change mechanism with single-side input and output is provided to solve the existing problems.
The following describes embodiments of the present invention with reference to the accompanying drawings, and first introduces specific structures of the embodiments of the present invention.
Referring to fig. 1, the single-side input and output four-planetary-row continuously variable transmission mechanism provided by the embodiment of the present invention includes a first planetary row 1, a second planetary row 2, a third planetary row 3 and a fourth planetary row 4, a first ring gear 103 on the first planetary row 1 is connected to a second sun gear 201 on the second planetary row 2 through a first connecting shaft 7, a second ring gear 203 on the second planetary row 2 is connected to a third carrier 302 on the third planetary row 3, the third carrier 302 on the third planetary row 3 is connected to a fourth sun gear 401 on the fourth planetary row 4 through a second connecting shaft 8, a fourth carrier 402 on the fourth planetary row 4 is connected to an output member 9, a first carrier 102 on the first planetary row 1, a second carrier 202 on the second planetary row 2, a third ring gear 303 on the third planetary row 3 and a fourth ring gear 403 on the fourth planetary row 4 are all connected to a same rotational speed connector, a unidirectional stopper 10 is provided on the same rotational speed connector, a third sun gear 301 on the third planetary row 3 passes through a second sun gear 6 and a second sun gear input shaft 7, a second sun gear connector 301, a second planetary row 4 and a fourth sun gear driver 101, a second planetary row input shaft 8 and a fourth planetary driver 401, a third planetary row 4, and a third planetary row input shaft connector 101.
Referring to fig. 1, the first planetary row 1 includes a first sun gear 101, a first carrier 102, and a first ring gear 103, the second planetary row 2 includes a second sun gear 201, a second carrier 202, and a second ring gear 203, the third planetary row 3 includes a third sun gear 301, a third carrier 302, and a third ring gear 303, and the fourth planetary row 4 includes a fourth sun gear 401, a fourth carrier 402, and a fourth ring gear 403. In practical application, the first connecting shaft 7, the second sun gear 201, the third sun gear 301, the third planet carrier 302, the second connecting shaft 8, the fourth sun gear 401, the fourth planet carrier 402, the output member 9 and the second input shaft 6 are all designed to be of a through hollow structure. The one-way stopper 10 serves to limit the rotational directions of the first carrier 102, the second carrier 202, the third ring gear 303, and the fourth ring gear 403.
In the following, a speed change method of a four-planetary-row continuously variable transmission mechanism based on single-side input and output needs to be described in conjunction with a specific structure of an embodiment of the present invention.
According to the basic principle of the planetary gear, if the rotating speeds of any two of the three members of the sun gear, the ring gear and the planet carrier are determined, the rotating speed of the other member is also determined, and the rotating speed relations of the members are in corresponding proportion according to the number of teeth of the sun gear and the number of teeth of the ring gear.
According to the basic principle of the planetary gear, the rotation speed of any two of the three components of the sun gear, the ring gear and the planet carrier is the same, and the rotation speed of the other component is also the same.
Therefore, the rotational speed of the first driving member is the same as the rotational speed of the first sun gear 101, and is set to N 1 (ii) a The rotational speed of the second driver is the same as the rotational speed of the third sun gear 301, and is set to N 2 (ii) a The rotation speeds of the first carrier 102, the second carrier 202, the third ring gear 303, and the fourth ring gear 403 are the same, and are set to N 3 (ii) a The first ring gear 103 and the second sun gear 201 have the same rotational speed, and are set to N 4 (ii) a The rotation speeds of the second ring gear 203, the third carrier 302, and the fourth sun gear 401 are the same, and are set to N 5 (ii) a The fourth carrier 402 and the output member 9 have the same rotational speed, and are set to N 6 。
A rotation speed vector diagram of the first planetary row 1, the second planetary row 2, the third planetary row 3 and the fourth planetary row 4 is obtained according to a rotation speed vector calculation method of the planetary gear, as shown in fig. 2. The length of the line segment in fig. 2 represents the magnitude of the rotation speed, the arrow direction represents the rotation speed direction, and the arrow direction is defined as a forward direction turning direction upward and a reverse direction turning direction downward.
The speed vector diagrams of the first planetary row 1, the second planetary row 2, the third planetary row 3 and the fourth planetary row 4 are combined together to obtain a speed vector diagram as shown in fig. 3.
See FIG. 3, when N is 1 、N 2 、N 3 、N 4 、N 5 And N 6 When any two values are determined, the other four values can be calculated through the proportional relation of line segments in the vector diagram. I.e. the rotational speed N of the first drive member 1 Determining the rotational speed N of the second drive element 2 Determining the rotational speed N of the output member 9 6 And is also uniquely determined. By regulating the speed N of the first drive member 1 And the rotational speed N of the second drive member 2 The rotational speed N of the output member 9 can be realized 6 Continuously stepless variation of (a).
Next, the speed change principle of the single-side input and output four-planetary-row continuously variable transmission according to the embodiment of the present invention will be described with reference to specific operating conditions.
1. Starting condition
Referring to fig. 3, when starting, the first driving piece and the second driving piece are started to accelerate, and the rotating speed N of the first driving piece is controlled in the aspect of steering 1 And the rotational speed N of the second drive member 2 Both in forward direction, controlling the speed N of the first drive member in terms of speed 1 And the rotational speed N of the second drive member 2 Is equal to P. The rotational speed N of the output member 9 6 Gradually accelerate and turn to the positive direction. Under the working condition, the power of the first driving piece and the power of the second driving piece are coupled together, and the vehicle is decelerated and torque-increased to output, so that the vehicle can accelerate to move forwards.
2. Acceleration and deceleration conditions
Referring to FIG. 4, the speed N of the first drive member is controlled in terms of steering during acceleration and deceleration 1 And the rotational speed N of the second drive member 2 Both in forward direction, controlling the speed N of the first drive member in terms of speed 1 And the rotational speed N of the second drive member 2 Is less than P. By controlling the speed N of the first drive member 1 And the rotational speed N of the second drive member 2 By the magnitude and the speed of increase and decrease, the number of rotations N of the output member 9 can be realized 6 The steering direction is the positive direction, so that the vehicle is accelerated or decelerated to run forwards.
Alternatively, as shown in FIG. 8, the method of acceleration and deceleration may be adjusted by maintaining the speed N of the first drive member 1 Without change, by adjusting the speed N of the second drive member 2 To adjust the rotational speed N of the output member 9 6 The size of (d); as shown in FIG. 9, the rotational speed N of the second driving element can also be maintained 2 Without change, by adjusting the speed N of the first drive member 1 To adjust the rotational speed N of the output member 9 6 The size of (2). Therefore, the rotating speed N of the output part 9 is realized 6 In the process of acceleration or deceleration, the first driving part and the second driving part can be different according to respective efficient working areas, and the control system controls the acceleration, deceleration and rotation speed maintenance of the first driving part and the second driving part according to the current working condition. Thus, can makeThe first driving part and the second driving part can work in respective high-efficiency working areas for a long time, so that the energy-saving effect is achieved.
3. Maximum vehicle speed condition
Referring to fig. 6, the rotational speed N of the first driver is controlled 1 And the rotational speed N of the second drive member 2 Is equal in magnitude, is in the forward direction, and reaches the maximum rotation speed, the rotation speed N of the output member 9 6 And the rotating speed N of the first driving member 1 And the rotational speed N of the second drive member 2 And equally, the vehicle may be set to reach the maximum vehicle speed in this state.
Referring to fig. 7, if the vehicle is required to reach a higher vehicle speed in the state where the above-described maximum vehicle speed is reached, the rotation speed N of the first drive member may be reduced 1 Maintaining the rotation speed of the second driving member at the highest rotation speed to make the rotation speed N of the output member 9 constant 6 The rise was continued. The maximum vehicle speed is determined by the rotational speed N of the output member 9 6 Is determined by the magnitude of (1), the rotational speed N of the output member 9 6 Can be determined by the rotational speed N of the first drive element 1 And the rotational speed N of the second drive member 2 To make the setting. Therefore, only the first driving part with lower rotating speed is selected, the very high output rotating speed can be realized, and the power requirement on the driving part is further reduced.
Aiming at the starting working condition and the acceleration and deceleration working condition, a dangerous working condition needs to be considered to avoid.
Example (c): referring to fig. 5, the speed N of the first drive member occurs when the speed control of the first and second drive members is inaccurate or fails 1 And the rotational speed N of the second drive member 2 Is greater than P, and the rotating speed N of the first driving member 1 And the rotational speed N of the second drive member 2 When the rotation directions of the output member 9 are both positive, the rotation speed N of the output member is set to 6 To prevent a serious accident that may occur when the vehicle suddenly travels in reverse direction and the steering direction is reversed, the first planetary carrier 102, the second planetary carrier 202, the third ring gear 303 and the fourth ring gear 403 are limited by providing the one-way stopper 10 on the same-speed connection body that connects the first planetary carrier 102, the second planetary carrier 202, the third ring gear 303 and the fourth ring gear 403 togetherRotational speed N of carrier 102, second carrier 202, third ring gear 303, and fourth ring gear 403 3 The direction of rotation of (1) can only be a forward direction, but cannot be a reverse direction. This ensures that the rotational speed N of the output member 9 is maintained 6 The steering of (c) is always positive. Therefore, when the dangerous condition occurs, the rotational speed N of the first carrier 102, the second carrier 202, the third ring gear 303 and the fourth ring gear 403 is limited due to the one-way stopper 10 3 The steering can only be in a forward direction and can not be in a reverse direction, at the moment, the two driving pieces can be mutually dragged, and the rotating speed N of the first driving piece 1 And the rotational speed N of the second drive member 2 Is always equal to P, the rotational speed N of the first planet carrier 102, the second planet carrier 202, the third ring gear 303 and the fourth ring gear 403 3 Equal to 0, rotational speed N of the output member 9 6 The steering of (2) can only be in the forward direction, so that the vehicle does not suddenly run in reverse.
4. Working condition of backing car
Referring to fig. 12, when the vehicle is reversed, the first driving member and the second driving member are started to accelerate, and the rotating speed N of the first driving member is controlled in terms of steering 1 And the rotational speed N of the second drive member 2 Both in opposite directions, controlling the speed N of the first drive member in terms of speed 1 And the rotational speed N of the second drive member 2 Is equal to P. The rotational speed N of the output member 9 6 Gradually accelerate and reverse direction. Under the working condition, the power of the first driving piece and the power of the second driving piece are coupled together, and the vehicle is decelerated and torque-increased to output, so that the vehicle can accelerate and retreat to run.
Except for the normal working condition and the dangerous working condition, some emergency working conditions need to be dealt with, and the embodiment of the invention takes the emergency working conditions into consideration and solves the problem.
Example (c): referring to FIG. 10, when the first driver fails, the second driver has a speed N 2 The rotational speed N of the first carrier 102, the second carrier 202, the third ring gear 303, and the fourth ring gear 403 in the forward direction 3 There is a tendency of reverse rotation in which the one-way stopper 10 restricts reverse rotation thereof so that the rotation speed N of the first carrier 102, the second carrier 202, the third ring gear 303, and the fourth ring gear 403 is made to be the rotation speed N 3 0, rotational speed N of the output member 9 6 The forward rotation of which is driven by the second driving memberThe three planetary rows 3 and the fourth planetary row 4 reduce the speed and increase the torque output, so that the vehicle can continue to accelerate or decelerate to run forwards.
Referring to FIG. 11, when the second driver fails, the first driver rotates at a speed N 1 The rotational speed N of the first carrier 102, the second carrier 202, the third ring gear 303, and the fourth ring gear 403 in the forward direction 3 There is a tendency of reverse rotation in which the one-way stopper 10 restricts the reverse rotation thereof so that the rotation speed N of the first carrier 102, the second carrier 202, the third ring gear 303, and the fourth ring gear 403 is made to be the rotation speed N 3 0, rotational speed N of the output member 9 6 The power of the first driving element is output through the first planet row 1, the second planet row 2 and the fourth planet row 4 in a speed reduction and torque increase mode in the forward direction, so that the vehicle can continue to accelerate or decelerate and run forwards.
Therefore, when one driving part fails, the other driving part can still drive the vehicle to run, and although the dynamic property is reduced, the vehicle can run to a maintenance place or a safety place by means of the one driving part, so that the reliability of the vehicle can be greatly improved.
The unilateral input and output four-planet-row stepless speed change mechanism and the speed change method thereof provided by the embodiment of the invention have the following advantages:
1. the four-star-row stepless speed change mechanism with unilateral input and output has no power interruption in the speed regulation process, runs quietly and stably, has better vehicle using experience when a user uses a vehicle, can greatly meet the requirements of customers in sense, and lays a good foundation for popularization and use of the product.
2. The single-side input and output four-planet-row stepless speed change mechanism can realize that the output end has large torque from low speed to high speed, and the large torque is output to realize that the vehicle has the capability of quick acceleration starting when driving, and the large torque can climb larger gradient when climbing the slope, and the large torque can also meet the requirements of more people for using the vehicle, so that the audience area of the product is larger.
3. The single-side input and output four-planet-row stepless speed change mechanism can realize stepless continuous change of output rotating speed, the driving piece at the input end can work in a high-efficiency interval for a long time, the working efficiency is improved, the effect of saving energy can be achieved in the aspect of energy use, and more contributions can be made in the aspect of energy saving.
4. The single-side input and output four-planet-row stepless speed change mechanism has simple and convenient speed regulation, and can realize stepless continuous change of output rotating speed only by controlling the rotating speed of the first driving piece and the second driving piece, thereby reducing the requirement of vehicles on a control system, widening the popularization and application range of the product and ensuring the popularization and popularity of the product to a certain degree.
5. According to the embodiment of the invention, the first driving part and the second driving part are coupled together in a power manner to drive the vehicle to run, when one driving part fails, the other driving part can still continue to drive the vehicle to run, so that when a vehicle owner uses the vehicle, even if one driving part fails, the vehicle owner can drive the vehicle by means of the other driving part and drive the vehicle to a maintenance site in time, the occurrence of a trailer calling event is avoided, and the vehicle using experience of the vehicle owner is better taken care of.
6. Compared with the traditional driving mode of a single driving part, the product provided by the embodiment of the invention not only can be driven by adopting the double driving parts, but also can be matched with the driving part with smaller volume and lower rotating speed, the driving part with small volume is more beneficial to the arrangement design of the driving part in the vehicle body, the aesthetic design of the appearance of the vehicle body at the later stage is more convenient, and the cost can be saved by using the smaller driving part.
7. The unilateral input and output four-planet-row stepless speed change mechanism has high transmission rate, a motor with lower power and lower rotating speed can be selected as a driving piece under the same working condition, and compared with a high-power battery, the low-power battery can better prevent the battery from overheating, and the use safety of the battery is indirectly improved through the embodiment of the invention.
8. The single-side input and output four-planet-row stepless speed change mechanism adopts four-planet-row transmission, increases the transmission ratio, further increases the torque, can be applied to heavy trucks such as trucks, muck trucks and passenger cars with larger loads, and further widens the application range of the embodiment of the invention.
9. According to the single-side input and output four-planet-row stepless speed change mechanism, the connecting ends of the first driving piece, the second driving piece and the output part are arranged at one end of the stepless speed change mechanism, so that power is input and output at one end of the stepless speed change mechanism, the first input shaft penetrates through the second input shaft and the second driving piece and is connected with the first driving piece, the design can greatly improve the utilization rate of space, and the whole power equipment is more reasonable in arrangement and space utilization rate.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (12)
1. A single-side input and output four-planet-row continuously variable transmission mechanism is characterized by comprising a first planet row (1), a second planet row (2), a third planet row (3) and a fourth planet row (4), wherein a first gear ring (103) on the first planet row (1) is connected with a second sun gear (201) on the second planet row (2) through a first connecting shaft (7), a second gear ring (203) on the second planet row (2) is connected with a third planet carrier (302) on the third planet row (3), and the third planet carrier (302) on the third planet row (3) is connected with a fourth sun gear (401) on the fourth planet row (4) through a second connecting shaft (8), an output component (9) is connected to a fourth planet carrier (402) on the fourth planet row (4), a first planet carrier (102) on the first planet row (1), a second planet carrier (202) on the second planet row (2), a third gear ring (303) on the third planet row (3) and a fourth gear ring (403) on the fourth planet row (4) are connected to a connector with the same rotating speed, a one-way stopper (10) is arranged on the connector with the same rotating speed, and a third sun gear (301) on the third planet row (3) penetrates through the third planet carrier (302) through a second input shaft (6), the second connecting shaft (8), the fourth sun gear (401), the fourth planet carrier (402) and the output component (9) are connected with a second driving element, and a first sun gear (101) on the first planet row (1) penetrates through the first connecting shaft (7), the second sun gear (201), the third sun gear (301), the second input shaft (6) and the second driving element through a first input shaft (5) to be connected with the first driving element.
2. A single-side input and output four-planetary-row continuously variable transmission according to claim 1, wherein the first connecting shaft (7), the second sun gear (201), the third sun gear (301), the third planet carrier (302), the second connecting shaft (8), the fourth sun gear (401), the fourth planet carrier (402), the output member (9) and the second input shaft (6) are all hollow structures.
3. The single-input, four-output planetary gear set stepless speed change mechanism according to claim 2, characterized in that the one-way stopper (10) is used for limiting the rotation direction of the first carrier (102), the second carrier (202), the third ring gear (303) and the fourth ring gear (403).
4. A speed change method of a four-planet-row stepless speed change mechanism based on single-side input and output is characterized in that a first driving piece and a first sun gear (101) are connected through a first input shaft (5), so that the rotating speed of the first driving piece is the same as that of the first sun gear (101); the second driving piece is connected with the third sun gear (301) through a second input shaft (6), so that the rotating speed of the second driving piece is the same as that of the third sun gear (301); a first planet carrier (102), a second planet carrier (202), a third gear ring (303) and a fourth gear ring (403) are all connected to a same-rotating-speed connecting body, so that the rotating speeds of the first planet carrier (102), the second planet carrier (202), the third gear ring (303) and the fourth gear ring (403) are the same; a first ring gear (103) and a second sun gear (201) are connected through a first connecting shaft (7) so that the rotating speed of the first ring gear (103) is the same as that of the second sun gear (201); the second ring gear (203) is connected with a third planet carrier (302), and the third planet carrier (302) is connected with a fourth sun gear (401) through a second connecting shaft (8), so that the rotating speed of the second ring gear (203), the rotating speed of the third planet carrier (302) and the rotating speed of the fourth sun gear (401) are the same; the fourth planet carrier (402) is connected with the output component (9) so that the rotating speed of the fourth planet carrier (402) is the same as the rotating speed of the output component (9).
5. The single-input/output-based speed change method for the four-planetary-row continuously variable transmission according to claim 4, wherein: the rotational speed of the first driving member and the rotational speed of the first sun gear (101) are N 1 The rotation speed of the second driving piece and the rotation speed of the third sun wheel (301) are N 2 The rotation speeds of the first planet carrier (102), the second planet carrier (202), the third gear ring (303) and the fourth gear ring (403) are N 3 The rotational speed of the first ring gear (103) and the rotational speed of the second sun gear (201) are N 4 The second ring gear (203), the third planet carrier (302) and the fourth sun gear (401) have a rotational speed N 5 The fourth planet carrier (402) and the output member (9) have a rotational speed N 6 (ii) a When said N is 1 、N 2 、N 3 、N 4 、N 5 、N 6 When any two values are determined, the other four values can be calculated through the proportional relation of line segments in the vector diagram, and the rotating speed N of the first driving piece is adjusted and controlled 1 And the rotational speed N of the second drive member 2 The rotational speed N of the output member (9) can be realized 6 Wherein the rotational speed N of the first planet carrier (102), the second planet carrier (202), the third ring gear (303) and the fourth ring gear (403) is set 3 When the rotation speed is 0, the rotation speed N of the first driving part is set 1 And the rotational speed N of the second drive member 2 The ratio of (A) to (B) is P; controlling the rotation speed N of the first driving part by adjusting 1 And the rotational speed N of the second drive member 2 To make the said transfusionThe output states of the output part (9) comprise a state A, a state B, a state C, a state D and a state E.
6. The single-input-output-based four-planetary-row continuously variable transmission mechanism speed change method according to claim 5, wherein in the state A, the rotation speeds N of the first carrier (102), the second carrier (202), the third ring gear (303) and the fourth ring gear (403) are N 3 Is 0, the rotating speed N of the first driving part 1 And the rotational speed N of the second drive member 2 Is P, the rotation direction is positive, so that the rotation speed N of the output part (9) 6 The direction of rotation of (c) is forward, and the transmission ratio is at a maximum.
7. The single-input-output-based four-planetary-row continuously variable transmission mechanism speed change method according to claim 5, wherein in the state B, the rotation speeds N of the first carrier (102), the second carrier (202), the third ring gear (303) and the fourth ring gear (403) are N 3 The rotation speed N of the first driving part is not 0 and the steering direction is the positive direction 1 And the rotational speed N of the second drive member 2 Is less than P, the rotation directions are positive directions, so that the rotating speed N of the output part (9) 6 The direction of rotation of (c) is the forward direction.
8. The single-side input-output four-planetary-row continuously variable transmission mechanism according to claim 5, wherein in the state C, the rotation speeds N of the first carrier (102), the second carrier (202), the third ring gear (303) and the fourth ring gear (403) are N 3 The rotation speed N of the first driving part is not 0 and the reverse direction is adopted 1 And the rotational speed N of the second drive member 2 Is greater than P, the direction of rotation is positive, the speed N of the output member (9) being at this time 6 Is reversed in order to avoid a rotational speed N of the output member (9) 6 In the case of a reverse direction, in the first carrier (102), the second carrier (202), the third ring gear (303) and the fourth ring gear(403) A one-way stopper (10) is arranged on the connected same-rotation-speed connecting body, and the one-way stopper (10) limits the rotation speed N of the first planet carrier (102), the second planet carrier (202), the third gear ring (303) and the fourth gear ring (403) 3 Can only be in a forward direction but not in a reverse direction, so that the rotational speed N of the output member (9) 6 The direction of turning of (1) is always positive.
9. A single-side input-output based four-planetary-row continuously variable transmission method as claimed in claim 5, wherein in the state D, the rotating speed N of the first driving member is 1 And the rotational speed N of the second drive member 2 Is 1, the rotation directions are positive directions, so that the rotating speed N of the output part (9) 6 And the rotating speed N of the first driving part 1 And the rotational speed N of the second drive member 2 Is equal in size, the steering is positive, and the transmission ratio is 1.
10. A single-side input-output based four-planetary-row continuously variable transmission method as claimed in claim 5, wherein in the state E, the rotating speed N of the first driving member 1 And the rotational speed N of the second drive member 2 Is less than 1, the rotation directions are positive directions, so that the rotation speed N of the output part (9) 6 Is greater than the rotating speed N of the first driving part 1 And the rotational speed N of the second drive member 2 The direction of rotation is the forward direction.
11. A single-side input/output based four-planetary-row continuously variable transmission method as claimed in claim 5, wherein when the first driving element fails, the second driving element has a rotation speed N 2 The direction of rotation is a forward direction, and the number of rotations N of the first carrier (102), the second carrier (202), the third ring gear (303), and the fourth ring gear (403) is N 3 The reverse rotation trend is generated when the one-way stopper (10) limits the reverse rotation of the first planet carrier (102), the second planet carrier (202), the third ring gear (303) and the fourth ring gear (403)Rotational speed N 3 0, the rotational speed N of the output member (9) 6 The power of the second driving piece is output in a speed reduction and torque increase mode through the third planetary row (3) and the fourth planetary row (4).
12. A single-side input/output based four-planetary-row continuously variable transmission method as claimed in claim 5, wherein when the second driving element fails, the rotating speed of the first driving element is N 1 The rotational speed N of the first carrier (102), the second carrier (202), the third ring gear (303), and the fourth ring gear (403) in the forward direction 3 The reverse rotation of the planetary gear tends to be limited by a one-way stopper (10) at the time, so that the rotating speed N of the first planet carrier (102), the second planet carrier (202), the third ring gear (303) and the fourth ring gear (403) is enabled 3 0, the rotational speed N of the output member (9) 6 The power of the first driving piece is output in a speed reduction and torque increase mode through the first planet row (1), the second planet row (2) and the fourth planet row (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113079.5A CN115853979A (en) | 2021-09-23 | 2021-09-23 | Single-side input and output four-planet-row stepless speed change mechanism and speed change method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111113079.5A CN115853979A (en) | 2021-09-23 | 2021-09-23 | Single-side input and output four-planet-row stepless speed change mechanism and speed change method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115853979A true CN115853979A (en) | 2023-03-28 |
Family
ID=85652929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111113079.5A Pending CN115853979A (en) | 2021-09-23 | 2021-09-23 | Single-side input and output four-planet-row stepless speed change mechanism and speed change method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115853979A (en) |
-
2021
- 2021-09-23 CN CN202111113079.5A patent/CN115853979A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2363653A1 (en) | Hydro-mechanical continuously variable transmission | |
| CN105857044A (en) | Dual motor-single planet gear set power device and electric car | |
| CN1793702B (en) | Variable-speed device | |
| WO2018228273A1 (en) | Series-parallel hybrid power system and vehicle comprising same | |
| CN113276658A (en) | Two keep off bi-motor planet row power split drive system | |
| CN105480075A (en) | Control structure based on single planet row | |
| CN113483066A (en) | Single-side input and output continuously variable transmission and speed change method thereof | |
| CN205890525U (en) | Bi -motor power device and electric automobile are arranged to single file star | |
| CN201145018Y (en) | Hydraulic differential stepless speed changer | |
| CN102312967A (en) | Continuously variable transmission | |
| CN215763090U (en) | Dual-drive coupling stepless speed change mechanism | |
| CN215720578U (en) | Single-side input and output four-planet-row stepless speed change mechanism | |
| CN215763092U (en) | Dual-drive four-planet-row stepless speed change mechanism | |
| CN215763131U (en) | Four-star row stepless speed change mechanism with classified input | |
| CN215806120U (en) | Single-side step-by-step transmission four-planet-row stepless speed change mechanism | |
| CN215720577U (en) | Hybrid double-planet-row stepless speed change mechanism | |
| CN115853979A (en) | Single-side input and output four-planet-row stepless speed change mechanism and speed change method thereof | |
| CN114211919B (en) | Driving system and aerocar | |
| CN115681428A (en) | Dual-drive coupling stepless speed change mechanism and speed change method thereof | |
| CN215720576U (en) | Single-side step-by-step transmission three-planet-row stepless speed change mechanism | |
| CN215596320U (en) | Dual-drive three-planet-row stepless speed change mechanism | |
| CN215567701U (en) | Three-planetary-row stepless speed change mechanism with classified input | |
| CN113685513B (en) | Stepless speed change mechanism and speed change method thereof | |
| CN115853980A (en) | Dual-drive four-planet-row stepless speed change mechanism and speed change method thereof | |
| CN113685514B (en) | Three-planetary-row stepless speed change mechanism with single-side input and output and speed change method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |