WO2008006300A1

WO2008006300A1 - Infinitely variable planet gear transmission

Info

Publication number: WO2008006300A1
Application number: PCT/CN2007/002070
Authority: WO
Inventors: Qiangguo Xu
Original assignee: Qiangguo Xu
Priority date: 2006-07-05
Filing date: 2007-07-04
Publication date: 2008-01-17
Also published as: CN1959147A

Abstract

An infinitely variable planetary gear transmission is a kind of mechanical infinitely variable transmission composed of planetary gear sets. This transmission makes full use of two degrees of freedom of the planetary gear sets to infinitely variable shift. It mainly comprises two planetary gear sets and a gear ratio controlling mechanism. These two planetary gear sets can transmit power with two degrees of freedom, one set is the main planetary gear set and the other one is the auxiliary planetary gear set. Any two basic elements (35,36) of the main planetary gear set can couple to, engage with, or be formed into one piece with any two basic elements (38,36) of the auxiliary planetary gear set. Another element (34) of the main planetary gear set serves as a driving element of transmission, another element (40) of the auxiliary planetary gear set serves as a driven element. The gear ratio controlling mechanism can control the maximum speed ratio and the minimum speed ratio between driving element and driven element, i.e. control the speed ratio not increasing when reached the maximum value and not decreasing when reached the minimum value. This transmission has compact structure, reliable operation and wide range of transmission. It can positive infinitely variable transmit between the maximum speed ratio and the minimum speed ratio according to the change of input power and output load.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical continuously variable transmission in which a planetary gear mechanism is combined. The transmission takes full advantage of the two degrees of freedom of the planetary gear mechanism and actively shifts continuously according to changes in input power and load. It is suitable for variable speed transmission of vehicles and machine tools.现有景 technology The existing planetary gear shifting mechanism always has one of the three basic components of the brake mechanism, or its movement is subject to certain constraints, so that the mechanism has only one degree of freedom, and transmits power with a certain transmission ratio. The result is only a step-variable shift. In order to achieve stepless speed change, it is used with a torque converter, which makes the structure complicated, the production cost is high, and the transmission efficiency is low. In the existing electronically controlled mechanical continuously variable transmission, although the transmission efficiency is slightly improved, various sensors are required to realize the shifting, and the production cost is also high. SUMMARY OF THE INVENTION In order to overcome the drawbacks of the prior art automatic continuously variable transmission, which is complicated in structure, high in production cost, and low in transmission efficiency, the present invention provides a planetary gear continuously variable transmission. The transmission is a mechanical continuously variable transmission with a combination of planetary gears. It takes full advantage of the two degrees of freedom of the planetary gear mechanism and is capable of active infinitely variable speed depending on changes in input power and load.

1. The motion law of the planetary gear mechanism:

The planetary gear mechanism consists of three basic components: the sun gear, the ring gear and the planet carrier with planetary gears. There are two basic forms of single planetary row and double planetary row.

1, single planet row

The single planetary gear mechanism is shown in Fig. 1. The ring gear is internally toothed. The planetary gear is supported on the planet carrier by the axle. The sun gear is at the center, and all the planet gears mesh with the ring gear while meshing with the outer sun gear. The speeds of the three elements of the sun gear, the ring gear and the planet carrier are nl, n2, η3, respectively. The number of teeth of the sun gear and the ring gear are zl, ζ2, and the gear ratio of the ring gear and the sun gear is a two z2/zl According to the balance of forces The condition and the law of conservation of energy can derive the characteristic equation of the general motion law of a single planetary gear mechanism:

Nl+an2- (a+ 1 ) n3 = 0

2, double planet row

The double planetary gear mechanism is shown in Figure 2: The planet carrier is equipped with inner planetary gears and outer planetary gears, and the ring gear is internally toothed; the inner planetary gear is externally meshed with the sun gear and the outer planetary gear, and the outer planetary gear and the ring gear Engage, the sun gear is at the center. Set the three components of the planetary row, the speed of the sun gear, the ring gear and the carrier, respectively, nl, n2, η3, the number of teeth of the sun gear and the ring gear are zl, z2, respectively, the gear ratio of the ring gear and the sun gear a = z2 / _Z l, According to the balance condition of force and the law of conservation of energy, the characteristic equation of the general motion law of the double planetary gear mechanism can be derived:

Nl-an2+ (a - 1 ) n3 = 0 ( 1-2)

2. Planetary gear stepless transmission:

According to equations (1 -1 ) and (1 -2 ), the planetary gear mechanism has two degrees of freedom, whether it is a single planetary row or a double planetary row. In the three basic components of the sun gear, the ring gear and the planet carrier, the rotational speed of any one component can be continuously changed for any one component; if the rotational speed of the two components is constant, then the rotational speed of the other component is also If the two components can simultaneously change the rotational speed, then the rotational speed of the other component may also be continuously changed, that is, the other component may achieve stepless speed change.

The planetary gear continuously variable transmission consists mainly of two planetary rows and a gear ratio control mechanism. The two planets transmit power in two degrees of freedom, one for the main planet and one for the sub-planet. Any two basic elements of the main planetary row are respectively coupled to, or integrated with, the two basic elements of the sub-planetary row, the other element of the main planetary row is the active member, and the other element of the secondary planetary row is driven. The ratio of the speed of the active and the driven parts is the transmission ratio. The transmission ratio control mechanism controls the maximum transmission ratio and the minimum transmission ratio of the transmission, that is, when the control transmission ratio reaches the maximum value, it can be reduced without increasing, and when it reaches the minimum value, it can be increased without further reduction. The gear ratio control method is: one-way locking of a component other than the active member and the driven member, or limiting the range of the rotational speed ratio of two components of the planetary row when the ratio is the maximum value and the minimum value.

If the loss such as friction is not considered, according to the law of conservation of energy, the power input by the active member and the power output from the driven member are equal in size, that is,

M main ω main = from "from (2 - 1) In the formula, the M main M is the torque of the active member and the driven member, respectively, and the ω main ω is the angular velocity of the active member and the driven member, respectively.

If the angular velocity is replaced by the rotational speed, then equation (2-1) can be written as:

Μ主 η main = Μ from η from (2-2)

Where η main η is the rotational speed of the active and the follower, respectively.

From formula (2-2):

η from = M main n main / Μ from (2-3)

It can be seen from equation (2-3) that the rotational speed of the follower is proportional to the product of the rotational speed and torque of the active member and inversely proportional to the torque of the follower. The product of the speed and torque of the active part is consistent with the input power, and the output torque of the follower is consistent with the load, that is, the planetary gear continuously variable transmission can actively and continuously change according to the change of input power and load.

It is important to note that the transmission ratio of the design transmission must be variable, ie the maximum transmission ratio is greater than the minimum transmission ratio and cannot be equal. If they are equal, the transmission can only transmit power with a certain gear ratio, and there is no stepless shifting function. For example, two single planetary rows with the same gear ratio or two double planetary rows with the same gear ratio, any two sets of the same-named components (ie, the sun gear and the sun gear, the ring gear and the ring gear, the planet carrier and the planet carrier) are respectively coupled or made. Integral, another group of the same name as one of the active parts as a follower, the speed of the active and follower is always the same.

1. One-way single-mode planetary gear continuously variable transmission

The technical solution for the one-way single-mode planetary gear continuously variable transmission is to use one main planetary chord and one sub-planetary to transmit power in two degrees of freedom, and the transmission ratio control mechanism to control the maximum transmission ratio of the transmission. Any two elements of the main planetary row are respectively coupled to, or integrated with, two elements of the sub-planetary, the other element of the main planetary row acting as the active part of the transmission, and the other element of the sub-planetary as the transmission The follower, the ratio of the speed of the driving member and the driven member is the transmission ratio of the transmission; the transmission ratio control mechanism can reduce the transmission ratio of the transmission when the driving member is rotated in the working direction without increasing.

There are 3 kinds of transmission ratio control methods -

(1) One-way clutch is used to unidirectionally lock a component other than the active member and the driven member;

(2), using a one-way clutch to control the speed of one component of the planetary row cannot exceed the other component;

(3) Using a planetary row that controls the gear ratio, two components of the planetary row are respectively coupled or integrated with the two components of the main planetary row or the sub-planetary row, and the one-way clutch is used to lock the planet in one direction. The third component of the row. Regardless of the method used, it must be ensured that the transmission ratio of the transmission is variable, and the control follower can only rotate in one direction when the driving member is rotated in the working direction.

The beneficial effects of the one-way single-mode planetary gear continuously variable transmission are: compact structure, reliable transmission, and active stepless speed change according to input power and load change; when the active part rotates forward, the follower follows the forward rotation, and the active part is stationary. In this case, the follower can also rotate forward; when the active part is reversed, the transmission idles. It is suitable for bicycles such as bicycles and machines with no power reversal.

2, one-way dual-system planetary gear continuously variable transmission

The technical solution adopted by the one-way dual-system planetary gear continuously variable transmission is: using one main planetary row and one sub-planetary to transmit power with two degrees of freedom and single steering, and controlling the active and driven parts by the speed ratio control mechanism The maximum speed ratio and the minimum speed ratio, the single steering power output from the follower realizes forward and reverse and neutral through the shifting mechanism. Any two elements of the main planetary row are respectively coupled to, or integrated with, two elements of the sub-planetary row, the other element of the main planetary row is the active member, and the other element of the auxiliary planetary row is the driven member; The gear ratio control mechanism controls the speed ratio of the active member and the driven member to no longer increase when the maximum speed ratio reaches the maximum value, and can be increased when the minimum value is reached, and the forward and reverse rotation of the transmission can be realized by the shifting mechanism. files. The shifting mechanism can be used with planetary rows or other gear configurations.

There are three types of speed ratio control methods:

(3) Using a planetary row that controls the speed ratio, two components of the planetary row are respectively coupled or integrated with the two components of the main planetary row or the sub-planetary row, and the one-way clutch is used to lock the planet in one direction. The third component of the row.

Regardless of the method used, it is necessary to ensure that the maximum speed ratio is greater than the minimum speed ratio. Between the maximum speed ratio and the minimum speed ratio, the main planetary row and the sub planetary row rotate in two degrees of freedom.

The advantages of the one-way dual-system planetary gear continuously variable transmission are: compact structure, reliable transmission, wide speed range (can be designed according to requirements), the transmission can be active between the maximum speed ratio and the minimum speed ratio according to the change of input power and load. Continuously variable speed

3, two-way single-mode planetary gear continuously variable transmission

The technical solution adopted by the two-way single-mode planetary gear continuously variable transmission is: The main planet row and one sub-planetary line transmit power in two degrees of freedom, and the two gear ratio control mechanisms respectively control the maximum gear ratio of the forward and reverse transmissions of the transmission. Any two elements of the main planetary row are respectively coupled to, or integrated with, two elements of the sub-planetary, the other element of the main planetary row acting as the active part of the transmission, and the other element of the sub-planetary as the transmission The follower, the ratio of the speed of the active and the follower is the transmission ratio of the transmission. A gear ratio control mechanism controls the maximum gear ratio of the transmission when the driving member rotates forward, and does not work when the driving member reverses; a gear ratio control mechanism controls the maximum gear ratio of the transmission when the driving member reverses, and the active member does not work when the rotor rotates forward. The two ratio control mechanisms control the steering of the follower to be consistent with the steering of the active member.

There are three types of gear ratio control methods:

(1), one-way clutch is used to lock one element except the active part and the driven part, and the working time of the one-way clutch is controlled by the brake;

(2), using a one-way clutch to control the speed of one component of the planetary row can not exceed the other component, and use the clutch to control the working time of the one-way clutch;

(3) Using a planetary row that controls the gear ratio, two components of the planetary row are respectively coupled or integrated with the two components of the main planetary row or the sub-planetary row, and the one-way clutch is used to lock the planet in one direction. The third component of the row controls the working time of the one-way clutch with a brake.

Regardless of the method adopted, it must be ensured that the gear ratio is no longer increased when it reaches the maximum value, and the steering of the control follower is consistent with the steering of the active member.

The two-way single-mode planetary gear stepless variable speed output has the advantages of compact structure, reliable transmission, and active stepless speed change according to input power and load change; when the active part rotates forward, the follower follows positive rotation, and the active part reverses. When turning, the follower is reversed. Applicable to machines whose power can be reversed.

4, two-way dual-system planetary gear continuously variable transmission

The technical solution adopted by the two-way dual-system planetary gear continuously variable transmission is: one main planetary platoon and one sub-planetary arranging power are transmitted in two degrees of freedom, and the two transmission ratio control mechanisms respectively control the transmission of the transmission forward and reverse. ratio. Any two elements of the main planetary row are respectively coupled to, or integrated with, two elements of the sub-planetary row, the other component of the main planetary row is the active member, and the other component of the auxiliary planetary row is the driven member. The ratio of the speed of the driving member to the driven member is the transmission ratio of the transmission; a ratio control mechanism controls the maximum transmission ratio and the minimum transmission ratio of the transmission when the driving member rotates forward, that is, the control transmission ratio does not increase when the maximum value is reached. Small, reaching the minimum When the time is no longer reduced, it can be increased, and the active part does not work when it is reversed; a transmission ratio control mechanism controls the maximum transmission ratio and the minimum transmission ratio of the transmission when the driving member is reversed, that is, the control transmission ratio does not increase when it reaches the maximum value. It can be reduced, it can be increased without reaching the minimum value, and it will not work when the active part is rotating forward. The two ratio control mechanisms control the steering of the follower to be consistent with the steering of the active member.

There are three types of gear ratio control methods:

α), one-way clutch is used to lock one element except the active part and the driven part, and the working time of the one-way clutch is controlled by the brake;

Regardless of the method, it is necessary to ensure that the maximum rotation ratio is greater than the minimum rotation ratio, and the steering of the control follower coincides with the steering of the active member.

The advantages of the two-way dual-system planetary gear continuously variable transmission are: compact structure, reliable transmission, wide speed range (can be designed according to requirements),

Actively steplessly shifting between the maximum gear ratio and the minimum gear ratio according to changes in input power and load; driving the left and right drive wheels of the vehicle separately with two two-way dual-system planetary gear continuously variable transmissions, which can replace the differential, and In the case where the drive wheel is 'slip', the transmission of the other drive wheel increases the torque output, which does not require a locking mechanism compared to the existing differential. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a single planetary row.

Figure 2 is a schematic diagram of the structure of a double planetary row.

Figure 3 is a block diagram showing the structure of a first embodiment of a one-way single-mode planetary gear continuously variable transmission.

Figure 4 is a block diagram showing the structure of a second embodiment of a one-way single-mode planetary gear continuously variable transmission.

Figure 5 is a structure of a preferred embodiment of a one-way dual-system planetary gear continuously variable transmission Schematic diagram, designated as the abstract drawing of the specification.

In Figure 1: 1 sun gear, 2 ring gears, 3 planet carriers, 4 planet gears.

Figure 2: 5 sun gear, 6 ring gear, 7 planet carrier, 8 outer planet gears, 9 inner gears.

In Figure 3: 10 main planet row sun gear, 11 main planet gear ring, 12 main planet row planet carrier, 13 planet row sun gear, 14 planet gear ring gear, 15 planet row planet carrier, 16 control maximum transmission Specific one-way clutch. 19 input shaft, 20 output shaft.

Figure 4: 21 main planet row sun gear, 22 main planet gear ring, 23 main planet row planet carrier, 24 planet row sun gear, 25 planet gear ring gear, 26 planet row planet carrier, 27 control maximum transmission Compared to the one-way clutch, 28 input shaft, 29 output shaft.

In Figure 5: 34 main planet row sun gear, 35 main planet row planet carrier, 36 main and sub planet planetary gear ring, 38 planetary sun gears, 40 planetary planets, 42 one-way clutch to control the maximum gear ratio, 43 one-way clutch for controlling the minimum gear ratio, 44 shifting the planetary sun gear, 45 shifting the planetary gear ring, 46 shifting the planetary carrier, 47 forward clutch, 48 reverse brake, 49 input shaft, 50 output axis. Embodiments of the invention achieve a preferred mode of the invention in that: the main planetary row and the sub-planetary row both use a single planetary row, the main planetary sun gear is used as the active part of the transmission, and the planet carrier or ring gear of the auxiliary planetary row is used as the transmission. The follower, the two planet rows are assembled on the same axis.

1. One-way single-mode planetary gear continuously variable transmission

The preferred way to achieve a one-way single-mode planetary gear continuously variable transmission is to use a single planetary row for both the main planetary row and the sub-planetary row, the main planetary sun gear for the active part of the transmission, and the planet carrier or ring gear for the auxiliary planetary row. As a follower of the transmission, the two planet rows are mounted on the same axis.

In Fig. 3, the main planet row carrier (12) is integrated with the sub planet row carrier (15), and the main planet gear ring (11) is made up of the outer planet sun gear (13), the main planetary row. The sun gear (10) acts as a transmission active member, directly mounted on the transmission input shaft (19), and the auxiliary planetary gear ring (14) acts as a transmission follower coupled to the output shaft (20); the one-way clutch (16) The race is integrally formed with the planet carrier, and the outer race is coupled to the transmission housing. When the one-way clutch locks the carrier, the transmission ratio of the transmission reaches a maximum value i. The gear ratio maximum value i is larger than the gear ratio of the main planetary row a main, The relationship between the number of teeth of the sub-planetary row and the a pair is:

i大二 a master /a H

In Figure 4, the main planetary row carrier (23) is integrated with the sub-planetary sun gear (24), and the main planetary gear ring (22) and the sub-plane gear ring (25) are integrated into one, the main planetary row The sun gear (21) acts as the transmission active member and is mounted directly on the input shaft (28). The sub planet row carrier (26) acts as the transmission follower and the output shaft (29); the one-way clutch (27) The seat ring is integrally formed with the ring gear (22), and the outer race is connected with the transmission housing. When the one-way clutch (27) locks the ring gear (22), the transmission ratio of the transmission reaches the maximum value i, the transmission ratio The maximum value i is greater than the number of teeth of the main planetary row. The relationship between the number of teeth of the main and auxiliary planetary rows is a:

i big two (a main + 1) - (a畐 1)

When the transmission shown in Fig. 3 and Fig. 4 is used in a bicycle, the output shaft can be omitted, and the chain is directly attached to the driven member.

2, one-way dual-system planetary gear continuously variable transmission

The preferred way to achieve a one-way dual-mode planetary gear continuously variable transmission is to use a single planetary row for the main planetary chops and the sub-planets, with the main planetary sun gear as the active part of the transmission, and the planet carrier of the sub-planetary as the transmission. The follower, the two planet rows are assembled on the same axis.

In Figure 5, the main planetary planet carrier (35) is integrated with the sub-planetary sun gear (38); the main planetary row and one sub-planetary share a ring gear (36); the main planetary sun gear (34) As the transmission active part, it is connected with the input shaft (49); the sub planet row carrier (40) acts as the follower; the one-way clutch (42) inner race and the ring gear (36) are made into one body and the outer race Mounted on the transmission case, one-way locking ring gear (36), controlling the maximum gear ratio; the one-way clutch (43) inner ring is connected with the input shaft (49), the outer race and the main planet carrier ( 35) Together, the speed of the main planet carrier (35) cannot be controlled beyond the input shaft (49) to control the minimum gear ratio. The shifting planetary sun gear (44) is coupled with the follower (40), and is equipped with a forward clutch (47) between the shifting planetary carrier (46); the shifting planetary carrier (46) ) equipped with a reverse brake (48); the shifting planetary gear ring (45) is integrated with the output shaft (50) of the transmission. When the clutch (47) is engaged, the brake (48) releases the brake, the shifting planetary gear rotates as a rigid body, and the forward speed is achieved. The ratio of the speed of the active member to the driven member is the transmission ratio of the transmission; the brake (48) brakes the shift. When the planet carrier (46) is in the planetary carrier (46), the clutch (47) is disengaged, and the shifting planetary gear ring (45) is reversed to achieve reverse gear, and the δ of the driven member follower The speed ratio and the gear ratio of the shifting planetary row together define the transmission ratio of the transmission;

(47) At the same time as the separation, the brake (48) releases the brake, and the transmission idling to achieve neutral.

The maximum gear ratio i of the forward gear of the transmission is larger than the gear ratio of the main planetary row a. The relationship between the gear ratio of the main and auxiliary planetary rows a is: i large = (main + 1) . ( & sub + 1 ), minimum The gear ratio is equal to 1; the maximum gear ratio i in the reverse gear is larger than the gear ratio of the main planetary row a. The gear ratio of the main and auxiliary planetary rows a, the gear ratio of the shifting planetary row a is: i large = ( a main + 1 ) * ( a + 1 ) · a change, the minimum gear ratio is equal to a.

If the gear ratio of the transmission is not large enough, the sun gear and the planet carrier can be shared with the main planetary row by a planetary train that controls the gear ratio, and the gear ring of the planetary gear is locked in one direction to control the maximum gear ratio of the transmission. When the planetary gear ring is locked, the ring gear of the main planetary row is reversed (ie, opposite to the active steering), and the planet carrier of the sub-planetary is rotating forward (ie, the same as the active steering). It is also possible to control the minimum transmission ratio with a planetary row that controls the gear ratio to achieve overspeed.

3, two-way single-mode planetary gear continuously variable transmission

The preferred way to achieve a two-way single-mode planetary gear continuously variable transmission is to use a single planetary row for both the main planetary row and the sub-planetary row, the main planetary sun gear for the active part of the transmission, and the planet carrier for the sub planetary row as the slave for the transmission. The moving parts, the two planetary rows are assembled on the same axis. E.g:

The main planetary sun gear is used as the active part of the transmission and is connected with the input shaft. The main planetary planet carrier is coupled with the sub-planetary sun gear. The main planetary row and the sub-planetary row share a ring gear, and the sub-planetary row The carrier acts as a follower of the transmission and is integrated with the output shaft. The ring gear acts as the inner race of the two one-way clutches with opposite lock directions. The outer races of the two one-way clutches are respectively controlled by two brakes, that is, the brake lock reverse direction when the active member rotates forward. One-way clutch that locks the forward direction of the clutch to the clutch and reverse rotation. When the ring gear is locked, the transmission ratio of the transmission reaches the maximum value i. The ratio of the number of teeth of i to the main planetary row a The ratio of the number of teeth of the main and auxiliary planetary rows to the a pair is - i is large (a main + 1 ), (a de +1 )

4, two-way dual-system planetary gear continuously variable transmission

The preferred way to implement a two-way dual-system planetary gear continuously variable transmission is to use a single planetary row for both the main planetary row and the sub-planetary row, the main planetary sun gear for the active part of the transmission, and the planet carrier for the sub planetary row as the slave for the transmission. Moving parts, two planets Equipped on the same axis. E.g:

The main planetary sun gear is used as the active part of the transmission and is connected with the input shaft. The main planetary planet carrier is coupled with the sub-planetary sun gear. The main planetary row and one sub-planetary share a ring gear. The planet carrier acts as a follower of the transmission and is integrated with the output shaft of the transmission. The ring gear acts as the inner race of the two one-way clutches with opposite lock directions. The outer races of the two one-way clutches are respectively controlled by two brakes, that is, the brake lock reverse direction when the active member rotates forward. One-way clutch that locks the forward direction of the clutch to the clutch and reverse rotation. Then, by using two one-way clutches, respectively, the rotation speed of the main planet carrier in the forward rotation and the reverse rotation of the driving member cannot exceed the input shaft, and the outer races of the two one-way clutches are connected with the main planet carrier. The inner race is connected to the input shaft via two clutches. When the driving member rotates forward, the forward clutch is engaged and the reverse clutch is disengaged; when the driving member is reversed, the reverse clutch is engaged and the forward clutch is disengaged. When the ring gear is locked, the gear ratio of the transmission reaches a maximum. The ratio of the gear ratio to the maximum value i is larger than that of the main planetary row. The ratio of the gear ratio of the main and sub planetary rows is a.

i large = ( a main + 1 ) ' deputy +1 )

The minimum transmission ratio of the two-way two-way planetary gear continuously variable transmission is equal to one.

Claims

Claim

1. A one-way single-mode planetary gear continuously variable transmission, which uses two planetary rows to transmit power to achieve shifting; and is characterized in that: a main planetary row and a sub-planetary row transmit power in one direction with two degrees of freedom, The transmission is controlled by a control mechanism to control the maximum transmission ratio of the transmission; any two components of the main planetary row are respectively coupled to, or integrated with, two elements of the sub-planetary, and the other component of the main planetary row acts as the active of the transmission. The other component of the sub-planetary row serves as the output of the transmission. The ratio of the speed of the active member to the output member is the transmission ratio of the transmission. The transmission ratio control mechanism controls the transmission ratio of the transmission when the driving member rotates in the working direction. When the maximum value is no longer increased, it can be reduced.

2. One-way two-system planetary gear continuously variable transmission, which uses two planetary rows to transmit power to realize shifting; the characteristic is: using a main planetary platoon and a sub-planetary to transmit power with two degrees of freedom and single steering. The speed ratio control mechanism is used to control the maximum speed ratio and the minimum speed ratio of the active member and the driven member, and the single steering power outputted by the follower realizes forward and reverse and neutral through the shifting mechanism; any two components of the main planetary row respectively Coupling or integral with the two elements of the sub-planetary, the other element of the main planetary row is the active part, the other element of the auxiliary planetary row is the driven part; the transmission ratio control mechanism controls the active part and the slave When the speed ratio of the moving parts reaches the maximum value, it can be reduced without increasing. When the minimum value is reached, the speed can be increased without further reduction. With the shifting mechanism, the forward and reverse gears of the transmission can be realized, and the shifting mechanism can use the planetary row. Other gear configurations are also possible.

3, two-way single-mode planetary gear continuously variable transmission, the transmission uses two planetary rows combined to transmit power to achieve shifting; characterized by; and a main planetary row and a sub-planetary row transmit power with two degrees of freedom, with two transmissions Controlling the maximum gear ratio of the forward and reverse transmissions of the transmission separately from the control mechanism; any two components of the main planetary row are respectively coupled with the two components of the sub planetary row, or integrated, or meshed, another component of the main planetary row As the active part of the transmission, the other component of the sub-planetary is used as the output of the transmission. The ratio of the speed of the active part to the output part is the transmission ratio of the transmission. One transmission ratio control mechanism controls the transmission of the transmission with the active part rotating forward. When the ratio reaches the maximum value, it can be reduced without increasing, and the active member does not work when it is reversed; a gear ratio control mechanism can reduce the transmission ratio of the transmission when the active member is reversed without reaching the maximum value. , the active part does not work when it is rotating forward; two transmission ratio control The steering of the mechanism control follower is consistent with the steering of the active member.

4. Two-way two-way planetary gear continuously variable transmission, which uses two planetary rows to transmit power to realize shifting. It is characterized by: transmitting power with two degrees of freedom with one main planetary row and one auxiliary planetary row, with two The gear ratio control mechanism respectively controls the gear ratio of the forward rotation and the reverse rotation of the transmission; any two components of the main planetary row are respectively coupled with the two components of the sub planetary row, or are integrally formed or meshed, and another component of the main planetary row For the active part, the other component of the sub-planetary is the output member, and the ratio of the speed of the active member to the output member is the transmission ratio of the transmission; a ratio control mechanism controls the maximum transmission ratio and the minimum transmission ratio of the transmission when the active member rotates forward, That is, when the control transmission ratio reaches the maximum value, it can be reduced without increasing, and when it reaches the minimum value, it can be increased without further reduction. When the active member is reversed, it does not work. One transmission ratio control mechanism controls the maximum of the transmission when the active member is reversed. The gear ratio and the minimum gear ratio, that is, when the control gear ratio reaches the maximum value, it can be reduced without increasing, and when it reaches the minimum value, it is no longer Small can be increased, the active element does not work when the timing switch; turning follower coincides with the rotation member toward the drive ratio control means two transmission control.

5. The unidirectional dual-system planetary gear continuously variable transmission according to claim 2, wherein: a main planetary platoon and a sub-planetary row are used to transmit power in two degrees of freedom, and the transmission is controlled by a transmission ratio control mechanism. Gear ratio; any two elements of the main planetary row are respectively coupled to, or integrated with, two elements of the sub-planetary, the other component of the main planetary row is the active component, and the other component of the secondary planetary row is The output member, the ratio of the speed of the active member to the output member is the transmission ratio of the transmission; when the transmission ratio control mechanism controls the transmission ratio of the transmission to a maximum value, it can be reduced without increasing, and can be increased without reaching the minimum value.