WO2019134663A1

WO2019134663A1 - High-efficiency and long service life meshing transmission continuously variable transmission

Info

Publication number: WO2019134663A1
Application number: PCT/CN2019/070240
Authority: WO
Inventors: 王国斌
Original assignee: 王国斌
Priority date: 2018-01-04
Filing date: 2019-01-03
Publication date: 2019-07-11
Also published as: CN110005778A

Abstract

A meshing transmission continuously variable transmission, which belongs to the technical field of mechanical transmission and continuously variable transmission design and manufacture, and which is designed by combining gear transmission and a continuously variable transmission and by organically combining gear transmission having a plurality of gears and the continuously variable transmission, so that the power flow path thereof may be smoothly switched according to requirements, and when the ideal transmission ratio for the transmission which is required for current working conditions is a gear transmission ratio, the power flow path of the meshing transmission continuously variable transmission preferentially uses gears to transmit power; and when the ideal transmission ratio for the transmission which is required for the current working condition cannot fit the gear transmission ratio, the power flow path thereof changes to the continuously variable transmission to transmit power, leading to such characteristics as "compactness, being lightweight, high efficiency and long service life".

Description

High efficiency long life meshing drive continuously variable transmission

Technical field

This application belongs to the technical field of mechanical transmission and continuously variable transmission design and manufacturing.

Background technique

The existing continuously variable transmission adopts friction traction transmission, and has the defects of small torque, low efficiency and high cost. The patented technology "slide deformation tooth stepless meshing movable gear" patent number 200580039668.6, describes an intermeshing type continuously variable transmission, which is characterized in that the meshing type stepless speed change function is constructed by the sliding piece movable teeth, and the traditional stepless speed is overcome. The transmission relies on the shortcomings of friction transmission and has the characteristics of high power and high efficiency. However, since the diameter of the cone directly affects the range of the transmission ratio, in order to design a transmission with a larger speed ratio range, the diameter of the cone must be enlarged, and at the same time, the axial displacement stroke of the cone is increased during shifting, which will make the radial direction of the transmission. The gear and axial dimensions are greatly increased, the chain circumference is increased, the shaft size is lengthened and bolded, and the corresponding parts of the box body are increased in volume and weight is increased. In addition, since the continuously variable transmission participates in the whole process of the entire working period of the transmission, higher requirements are placed on the life efficiency of the continuously variable transmission.

Summary of the invention

The present application proposes a "high-efficiency long-life meshing transmission continuously variable transmission", which can effectively solve the above problems, and has the characteristics of "compact, lightweight, high efficiency, long life".

The specific structure is: the gear transmission is designed in combination with the CVT of the continuously variable transmission, and the gear transmission of several gears is combined with the CVT of the continuously variable transmission, and the power flow path can be smoothly switched according to the demand. When the ideal transmission ratio of the transmission required for the working condition is the gear ratio transmission ratio, the power flow path preferentially transmits power with the gear; when the ideal transmission ratio required for the current working condition cannot match the gear gear ratio, The power flow path is changed to the transmission power of the continuously variable transmission, so that no power interruption can be achieved in the entire working range of the transmission, and the speed ratio range of the continuously variable transmission can be designed to be small, and only needs to satisfy the adjacent two gears. The speed ratio between the two can be achieved, and the volumetric weight is greatly reduced. If the gear gear design is sufficiently dense, it is almost possible to find the best gear gear to work as much as possible during the entire working time of the transmission, which will greatly shorten the working period of the continuously variable transmission, and the CVT function can basically It evolved to only meet the over-switching work between different gear gears, ensuring smooth and unpowered interrupt shifting, ensuring the best transmission efficiency and shift quality of the transmission. Reliability and longevity are improved. With a very good objective performance analogy: this type of transmission is equivalent to the existing CVT continuously variable transmission plus DCT dual clutch transmission performance, so named: CCT gear continuously variable transmission.

DRAWINGS

The present application will be specifically described below in conjunction with the accompanying drawings and embodiments:

Figure 1: Schematic diagram of the CCT meshing drive continuously variable transmission assembly mechanism

Figure 2-10: Schematic diagram of the shift logic explanation mechanism of the CCT meshing transmission continuously variable transmission

Figure 11~12: The direct file is not the most up-to-date CCT design mechanism and the schematic diagram of the shift logic explanation mechanism.

Figure 13: Schematic diagram of CCT central CCT assembly

Figure 14-21: Schematic diagram of CCT shift logic explanation mechanism with CVT neutral gear

Figure 22-23: Schematic diagram of the compact CCT meshing drive continuously variable transmission assembly mechanism

Figure 24: Schematic of the CVT front-mounted compact CCT assembly

Figure 25-29: Schematic diagram of the double intermediate shaft cyclic shift type CCT shift logic explanation mechanism

Figure 30-35: Schematic diagram of the CCT second-class shift logic explanation mechanism

Figure 36: Schematic diagram of the elastic return coupling

Figure 37, 38 stabilizer structure diagram

Figure 39 to 40: Schematic diagram of the transversely-predicted CCT meshing transmission continuously variable transmission assembly mechanism

among them:

1. Input shaft 20, stabilizer (with elastic reset function)

2. Intermediate shaft A 21, output shaft gear

3. Intermediate shaft B 22, cone plate group A

4, the third gear pair 23, the cone group B

5, four gear pair 24, output shaft

6, first and third gear synchronizer 25, continuously variable transmission belt or chain

7, second and fourth gear synchronizer 26, separate output shaft gear B

8, first gear pair 27, separate output shaft synchronizer

9, second gear pair 28, separate output shaft gear A

10, 5 (direct)

synchronizer

29, 6 gear pair

11, reverse gear pair (or sprocket pair) 30, six-speed synchronizer

12, bearing 31, embedded stabilizer

13, reverse synchronizer 32, low output gear

14, elastic reset coupling 33, low intermediate shaft output gear A

15, bearing 34, first gear pair

16, intermediate shaft output synchronizer A 35, second gear pair

17, intermediate shaft output synchronizer B 36, third gear pair

18, intermediate shaft output gear A 37, fourth gear pair

19. Intermediate shaft output gear B 38, small speed ratio output gear pair

39. Large speed ratio output gear pair 65, shock absorption spring

40. In-line elastic reset device 66. Overload protection control block

41. Coaxial hole shaft combined setting scheme 67. Overload protection spring

42. Input shaft gear 68, torque output end

43. Intermediate shaft input gear B 69, torque output shaft

44, intermediate shaft input synchronizer B 70, positioning lands

45. Intermediate shaft input gear A 71, two-way damping spring

46. Intermediate shaft input synchronizer A 72, torque input disc

47, first gear pair 73, fourth gear intermediate shaft gear

48, second gear pair 74, three, four gear input gear (connected to the input shaft

49, third gear pair

50, four gear pair 75, first and second gear input gear (connected to the input shaft

51, first and third gear synchronizer

52, second and fourth gear synchronizer 76, intermediate shaft output gear B

53. Low intermediate shaft output synchronizer A 77, CVT cone set B

54. Middle intermediate shaft output synchronizer A 78, third gear intermediate shaft gear

55, the middle intermediate shaft output gear A 79, the output large gear

56. Middle output gear 80, intermediate shaft output gear A

57. Low intermediate shaft output gear B 81, CVT cone group A

58. Low intermediate shaft output synchronizer B 82, direct gear small sprocket

59, the middle intermediate shaft output synchronizer B 83, direct gear synchronizer

60, the middle intermediate shaft output gear B 84, the input shaft

61. Elastic reset member 85. Output half shaft

62, elastic reset coupling outer ring 86, differential

63. Elastic reset coupling inner ring 87, transmission chain

64, torque input 88, output large sprocket

Detailed ways

A schematic diagram of the CCT meshing transmission continuously variable transmission assembly mechanism is shown in Figure 1:

The input shaft (1) is equipped with gear input gears, and each input gear meshes with its corresponding output gear. Each output gear is alternately and evenly distributed on both sides of the intermediate shaft A and the intermediate shaft B according to an even number and an odd number to form a first gear. Second gear, third gear, fourth gear gear pair; reverse gear can be driven by traditional idler gear or sprocket chain drive; in this picture, 5 gears are direct gear and the most high gear; Each corresponds to a synchronizer.

The intermediate shaft output gear A and the intermediate shaft output gear B are attached to the output ends of the intermediate shaft A and the intermediate shaft B, and mesh with the output shaft gear 21, and the output shaft gear 21 outputs power through the output shaft 24.

As shown in the figure: in the double intermediate shaft A, the intermediate shaft B are respectively mounted with the CVT continuously variable transmission cone set A, the cone set B, the cone set A, the cone set B through the continuously variable transmission belt or chain 25 power.

A plurality of elastic return couplings 14 are provided on the transmission shaft, and a stabilizer (with elastic reset function) 20 is provided. The purpose of the elastic reset coupling 14 is to make the synchronizer sleeve close to the air when combined with the combined teeth. Loaded, similar to the traditional transmission, the power needs to be cut off when shifting. Note: The transmission has full synchronization when shifting, and the relay of the power flow is realized by the shift of the CVT continuously variable transmission. Therefore, when the synchronizer is combined, the power is instantaneous. The flow is not here, and the rotational speed is synchronized. Therefore, the elastic reset coupling 14 or the stabilizer 20 can be used to obtain the no-load shift in a state where the power flow is not required to be disconnected by the clutch, that is, the shift is not required. The clutch separates the power flow, which is also an advantage of the transmission.

See Figure 36 for the working principle of the elastic return coupling. In the no-load no-load state, the inner ring 63 and the outer ring 62 are automatically reset to the neutral state under the action of the elastic return member 61, ensuring that the synchronizer is combined with the sleeve. When the teeth are combined, there is a certain free rotation angle, that is, the elastic force of the elastic returning member recovers to the initial state or close to the initial state at the middle position, and the elasticity is small at this moment, that is, it can be rotated by a certain angle with a small force, which is free. The angle of rotation is: less than or equal to a meshing pitch of the synchronizer sleeve and the combined tooth, that is, the circumferential angle of the adjacent joint tooth, that is, the rotation required when the synchronizer sleeve is combined with the combined tooth The maximum angle. Note: This spring force does not have to be too large, just need to be free to elastically reset to the neutral position under no-load conditions.

Note: In this paper, the synchronizer basically shifts under the condition of full synchronous speed. Therefore, the synchronizer can simplify the structure. For example, the synchronizing ring can be removed and simplified directly into a combined sleeve or other structure.

Stabilizer function and principle analysis: In order to eliminate the transmission interference caused by the unequal micro-transmission ratio or the angular velocity pulsation of the CVT and the gear transmission at the same time, the structure diagram of the stabilizer is shown in Figure 37 and 38. The stabilizer A shown in 37 is composed of an elastic buffer and an overload protection zone, including: a torque input end, a damping spring, an overload protection control block, an overload protection spring, a torque output end, etc., when the torque is within a normal working allowable range. Internally, only the elastic buffer acts. If the torque exceeds the normal working allowable range, the overload protection control block is separated for safety protection.

In general, it is also possible to provide only an elastic buffer, such as the stabilizer B shown in FIG. 38, which has a structure equivalent to an elastic damper, which is composed of a driving disc, a driven disc, and an elastic connecting member, wherein the elastic connection The components can be designed as two-way shock absorption and one-way damping according to actual conditions. As shown in the figure: torque input shaft, positioning lands, two-way damper springs, torque input discs, etc. The elastic cushioning damping component may be a metal spring, a non-metallic spring, a gas spring, a hydraulic spring, a hydraulic damper or the like. The inputs and outputs described in this article are relative concepts, and their functions can be interchanged according to actual conditions.

Note: In this paper, the stabilizer has the function of elastic return coupling. In addition, the stabilizer and the elastic reset coupling can be separated and set independently, or can be combined and integrated, as shown in Figure 13: The combination of the stabilizer and the cone of the reset coupling function is more compact and the force is good, and the load sharing of the continuously variable transmission is improved.

For friction drive CVTs, this stabilizer can also be considered for removal. In addition, when the CVT's transmission accuracy and synchronous speed control accuracy are high, the stabilizer can also be simplified or removed.

The continuously variable transmission in the present application may be a conventional continuously variable transmission, or may be a movable tooth mesh type continuously variable transmission described in Patent No. 200580039668.6, or may be a variable speed power or transmission device such as a speed regulating motor or an oil pump motor.

Note: The CVT function in this patent is not only a stepless speed change, but also has the function of changing the power flow path by using its shifting. For example: as shown in Figure 2~3: When the transmission power flow is stepless from the first gear to the CVT At the time of shifting, the power flow is initially carried by the intermediate shaft output synchronizer A. At this moment, although the intermediate shaft output synchronizer B is also in the combined state, it does not participate in the load at first. When the CVT starts shifting, the intermediate shaft B rotates slightly. When the rotational speed is higher than the intermediate shaft A, the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth actively participate in the bearing, and the combined sleeve of the intermediate shaft output synchronizer A and the combined tooth are automatically unloaded, and at the same time, the intermediate shaft output synchronizer A separation completes the change of the power flow path. Note: This design principle makes it possible that all the combination of the synchronizer and the combined teeth and the movement process of the separation are carried out under no-load conditions, thereby ensuring the reliability and the service life.

On the contrary, if you want to slow down, as shown in the reverse analysis in Figure 4~3: from the second gear to the first gear, the CVT is required to accelerate slightly in the reverse direction, so that the intermediate shaft A is slightly slightly higher than the intermediate shaft B. The combined sleeve of the output synchronizer A and the combined tooth actively participate in the load, and the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth are automatically unloaded, and at the same time, the intermediate shaft output synchronizer B is separated, after the switching of the power flow path is completed. The CVT starts to decelerate again, and the intermediate shaft A speed and the output shaft speed decrease.

Figure 2-10: Schematic diagram of shifting logic explanation mechanism for CCT meshing transmission continuously variable transmission

Figure 2 shows the first gear stage of the CCT meshing transmission continuously variable transmission. At this time, the first gear synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft A. The path indicated by the two-dot chain line is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission is equal to 1, as shown in the right figure, the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized. Prepare for one step of stepless speed change.

Figure 3 shows the CCT meshing transmission continuously variable transmission from the first gear to the second gear stepless speed change process. At this time, the first gear synchronizer and the intermediate shaft output synchronizer B are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission. The path indicated by the two-dot chain line in the figure is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition requirement. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, such as As shown in the figure on the right, the speed of the intermediate shaft B reaches the maximum speed under the current gear position. The combined sleeve of the second-speed synchronizer and the combined gear speed are synchronized, which is ready for the next second gear.

As shown in Figure 4, the CCT meshing transmission continuously variable transmission second gear pair works. At this time, the second gear synchronizer and the intermediate shaft output synchronizer B are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft B. The path indicated by the dotted line is the current power flow path. At this time, the intermediate shaft A and the CVT continuously variable transmission are in the no-load state, and the CVT transmission ratio can be easily and quickly adjusted to 1, as shown in the right figure. The speed of A is synchronized with the intermediate shaft B, and the combined sleeve of the intermediate shaft output synchronizer A and the combined tooth speed are synchronized to prepare for the next stepless shifting.

Figure 5 shows the CCT meshing transmission continuously variable transmission from the second gear to the third gear stepless speed change process. At this time, the second gear synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission. The path indicated by the two-dot chain line in the figure is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition requirement. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, such as As shown in the figure on the right, the speed of the intermediate shaft A reaches the maximum speed under the current gear position. The combination of the three-speed synchronizer and the combined tooth speed are synchronized, ready for the next three-speed.

As shown in Fig. 6, the CCT meshing transmission continuously variable transmission third gear pair works. At this time, the third gear synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft A. The path indicated by the dotted line is the current power flow path. At this time, the intermediate shaft B and the CVT continuously variable transmission are in the no-load state, and the CVT transmission ratio can be easily and quickly adjusted to 1, as shown in the right figure. B speed up to synchronize with the intermediate axis A, the combination of the intermediate shaft output synchronizer B and the combined tooth speed are prepared for the next stepless speed change.

Figure 7 shows the CCT meshing transmission continuously variable transmission from the third gear to the fourth gear stepless speed change process. At this time, the third gear synchronizer and the intermediate shaft output synchronizer B are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission. The path indicated by the two-dot chain line in the figure is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition requirement. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, such as As shown in the figure on the right, the speed of the intermediate shaft B reaches the maximum speed under the current gear position. The combination of the four-speed synchronizer and the combined tooth speed are synchronized, so that the fourth gear is ready for the next step.

As shown in Fig. 8, the CCT meshing transmission continuously variable transmission four-speed gear pair works. At this time, the fourth-speed synchronizer and the intermediate-shaft output synchronizer B are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft B. The path indicated by the dotted line is the current power flow path. At this time, the intermediate shaft A and the CVT continuously variable transmission are in the no-load state, and the CVT transmission ratio can be easily and quickly adjusted to 1, as shown in the right figure. The speed of A is synchronized with the intermediate shaft B, and the combined sleeve of the intermediate shaft output synchronizer A and the combined tooth speed are synchronized to prepare for the next stepless shifting.

Figure 9 shows the CCT meshing drive continuously variable transmission from four-speed to five-speed stepless speed change process. At this time, the four-speed synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission. The path indicated by the two-dot chain line in the figure is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition requirement. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, such as As shown in the figure on the right, the intermediate shaft A speed reaches the maximum speed under the current gear position, and the combination of the five-speed (direct-speed) synchronizer and the combined tooth speed are synchronized, ready for the next five-speed (direct gear).

As shown in Fig. 10, the CCT meshing transmission continuously variable transmission operates in the fifth gear (direct gear). At this time, the fifth gear (direct gear) synchronizer is combined, and the transmission power flow is directly transmitted through the input shaft 1 and the output shaft 24, in the drawing. The path indicated by the two-dot chain line is the current power flow path. At this time, except for the input shaft 1 and the output shaft 24, all transmission components of the transmission are in an idle state, and the transmission efficiency is close to 100%.

For the car, basically equipped with overspeed gear, the direct gear is not the highest gear, the design under this condition is shown in Figure 11, 6 gear is overspeed gear, its gear ratio is less than 1, in order to meet the stepless from the direct gear to the overspeed gear For the shifting transition, the output gears must be grouped into two groups, such as a split output shaft gear A, a split output shaft gear B, and a separate output shaft synchronizer 27 is added between them as shown.

Figure 11 shows the CCT meshing transmission continuously variable transmission from the fifth gear (direct gear) to the sixth gear stepless shifting process. At this time, the five gear (direct gear) synchronizer, the intermediate shaft output synchronizer A, the intermediate shaft output synchronizer In combination B, the split output shaft synchronizer 27 is disconnected, and the transmission power flow is transmitted through the CVT continuously variable transmission. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission of the CVT continuously variable transmission The ratio can be changed steplessly according to the current working condition. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, as shown in the right figure, the intermediate shaft A speed reaches the maximum speed under the current gear position, and the six-speed synchronizer is combined. And combined with the tooth speed synchronization, ready for the next six gears.

As shown in Fig. 12, the six-speed gear pair of the CCT meshing transmission continuously variable transmission works. At this time, the six-speed synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft A. The path indicated by the dotted line is the current power flow path. Note: In order to ensure deceleration and downshift at any time, the CVT transmission ratio cannot be restored to 1, but keep the minimum value as shown in the figure on the right. At this time, the five-speed (direct-speed) synchronizer and the intermediate-axis output synchronizer B are both Keep the joint sleeve and the joint tooth synchronous, the split output shaft synchronizer 27 is disconnected, or: the five-speed (direct-speed) synchronizer and the intermediate-shaft output synchronizer B can be combined to select one for the deceleration and downshift at any time. Ready.

Figure 13: Schematic diagram of the CCT central CCT assembly. As shown in the figure, the CVT CVT is placed in the middle of the multi-gear gear set and the output gear pair. It is compact and can be adapted to the needs of specific space applications. As shown in the figure: the stabilizer 31 adopts an in-line structure and is integrated with the cone. The structure is compact, the force is symmetrical and uniform, and it is beneficial to improve the load sharing of the continuously variable transmission. It is also beneficial to improve the uniformity of the movable teeth and the chain teeth. Note: This in-line stabilizer 31 has the function of an elastic return coupling.

Figure 14-21: Schematic diagram of the CCT shift logic explanation mechanism with CVT neutral gear. In order to improve the mechanical transmission efficiency and prolong the life, the time for the CVT to participate in the transmission power should be reduced as much as possible. Therefore, the gear transmission position should be increased as much as possible. Intensive, so the medium transmission gear set is added, as shown in Figure 14, the

parts number

54, 55, 56, 59, 60 are: the intermediate intermediate shaft output synchronizer A, the intermediate intermediate shaft output gear A The median output gear, the neutral intermediate shaft output synchronizer B, the intermediate intermediate shaft output gear B, the so-called "median transmission gear set", as its name suggests, is the intermediate value of its gear ratio equal to the CVT gear ratio for transmission in the CVT When the position of the middle section of the power is stopped, the gear pair transmits power instead of the CVT to improve the transmission efficiency.

Note: The so-called "median value of CVT transmission ratio" is a specific pronoun of this patent, not the intermediate position or 1/2 in the strict sense. In the actual application process, this value should be determined according to the actual working condition of the vehicle. Generally, the median transmission ratio value with a higher frequency of use is taken as the theoretical "median transmission ratio".

Figure 14 shows the first gear pair of the CCT CVT with CVT neutral gear. At this time, the first gear synchronizer and the low intermediate shaft output synchronizer A are combined. The transmission power flow is transmitted through the gear and the intermediate shaft A. Passing, the path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission is equal to 1, as shown in the right figure, the combined sleeve of the lower intermediate shaft output synchronizer B and the combination The tooth speed is synchronized to prepare for the next stepless speed change.

Figure 15 shows: CCT continuously variable transmission with CVT neutral gear gear from 1st gear to 1.5 gear stepless speed change process, at this time, 1st gear synchronizer, low intermediate shaft output synchronizer B combined, transmission power flow through CVT The continuously variable transmission is transmitted. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition, when the CVT continuously variable transmission When the transmission ratio reaches the neutral position (median value, for example: 0.66), as shown in the right figure, the combination sleeve of the neutral intermediate shaft output synchronizer A and the combined tooth speed are synchronized, ready for the next 1.5th gear.

Figure 16 shows the 1.5-speed gear pair of the CCT CVT with CVT neutral gear. At this time, the first-speed synchronizer and the neutral intermediate-shaft output synchronizer A are combined, and the transmission power flows through the gear and the intermediate shaft A. For the transmission, the path indicated by the two-dot chain line in the figure is the current power flow path. Note: In order to ensure that the CVT transmission ratio cannot be restored to 1 at any time, the original neutral position is unchanged, so as to ensure the low intermediate axis. The output sleeve of the output synchronizer B and the combined tooth speed are still synchronized, as shown in the figure on the right, in preparation for the CVT to participate in the work for deceleration and downshifting.

Figure 17 shows the CCT continuously variable transmission with CVT neutral gear gear from 1.5 to 2 infinitely variable speed. At this time, the 1st synchronizer and the low intermediate shaft output synchronizer B are combined, and the transmission power flow passes through the CVT. The continuously variable transmission is transmitted. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition, when the CVT continuously variable transmission When the transmission ratio reaches the minimum, as shown in the figure on the right, the speed of the intermediate shaft B reaches the maximum speed under the current gear position. The combination of the two-speed synchronizer and the combined tooth speed are synchronized, so that the second gear is ready for the next step.

Figure 18 shows the 2nd gear pair of the CCT continuously variable transmission with the CVT neutral gear. At this time, the 2nd synchronizer and the low intermediate shaft output synchronizer B are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft B. Passing, the path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the intermediate shaft A and the CVT continuously variable transmission are in an idle state, and the CVT transmission ratio can be easily and quickly adjusted to 1, as shown in the right figure. It is shown that at this time, the intermediate shaft A is speeded up to be synchronized with the intermediate shaft B, and the coupling sleeve of the low intermediate shaft output synchronizer A and the combined tooth speed are synchronized, so as to prepare for the next stepless shifting.

Figure 19 shows: CCT continuously variable transmission with CVT neutral gear gear from 2nd gear to 2.5 gear stepless speed change process, at this time, 2nd gear synchronizer, low intermediate shaft output synchronizer A combined, transmission power flow through CVT The continuously variable transmission is transmitted. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition, when the CVT continuously variable transmission When the transmission ratio reaches the neutral position (median value, for example: 0.66), as shown in the right figure, the combination sleeve of the neutral intermediate shaft output synchronizer B and the combined tooth speed are synchronized, ready for the next 2.5 gear.

Figure 20 shows the 2.5-speed gear pair of the CCT CVT with CVT neutral gear. At this time, the 2nd synchronizer, the neutral intermediate shaft output synchronizer B combines, the transmission power flows through the gear and the intermediate shaft B. For the transmission, the path indicated by the two-dot chain line in the figure is the current power flow path. Note: In order to ensure that the CVT transmission ratio cannot be restored to 1 at any time, the original neutral position is unchanged, so as to ensure the low intermediate axis. The output sleeve of the output synchronizer A and the combined tooth speed are still synchronized, as shown in the right figure, in preparation for the CVT to participate in the work for deceleration and downshifting.

The working principle of other gears is the same as above, and the explanation will not be repeated. The gear position of the transmission shown in this figure can realize 9 fixed speed ratio files, which are: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5 (direct file).

Figure 21 is a shifting logic diagram for a CCT continuously variable transmission with a CVT neutral gear through a neutral gear sub-path, that is, the power flow transmitted through the CVT can also pass through the neutral gear pair. The path is continuously variable, which can match more gear ratio values and adapt to more gear shifts.

As shown in Fig. 22, the input gears of the first and second gear pairs are common, and the input gears of the third and fourth gear pairs are common, which can reduce the axial size and make the structure more compact, but because of this way, the double intermediate The center distances of the axes A and B and the input shaft and the output shaft are no longer equal. Therefore, in order to ensure equal gear ratios between the double intermediate shafts A and B and the output shaft, output gear pairs of different speed ratios must be set, such as As shown in Fig. 22, the small speed ratio output gear pair 38 and the large speed ratio output gear pair 39 are shown.

As shown in Fig. 23, since the CVT continuously variable transmission can set any gear ratio to suit different needs, it can also be designed as: small speed ratio output gear pair 38, large speed ratio output gear pair 39 merge in axial space. The gears on the output shaft are combined and common. By adjusting the different speed ratios of the CVT to obtain the combined sleeve of the corresponding synchronizer and the synchronizing speed of the combined teeth, the speed synchronization problem when the power of the gear pair and the CVT are alternated is satisfied, that is, the double intermediate shafts A and B. The gear pair transmission ratio with the output shaft is not equal. As shown in the figure, the intermediate shaft A rotates lower than the intermediate shaft B. It is necessary to set the CVT speed ratio not equal to 1 to meet the demand. Obviously, this condition CVT is easy to implement. This solution will make the transmission structure more compact.

Figure 24: Schematic diagram of the CVT front-mounted compact CCT assembly. The CVT continuously variable transmission is placed at the forefront of the transmission and is compact enough to meet the needs of specific space applications. This structure makes the elastic return coupling on the synchronizer have to adopt the structure of the in-line elastic resetter 40. The specific structure and working principle can be referred to FIG. 36. At the same time, in order to further reduce the axial dimension, the output shaft 1 and the output shaft 24 can be set as the coaxial hole shaft combined arrangement scheme 41 as shown; in order to reduce the lateral dimension, the input and output shafts and the double intermediate shaft can be set. The spatial layout is set to a triangular relationship, as shown in the image to the right.

Figure 25-29: Schematic diagram of the double intermediate shaft cyclic shift type CCT shift logic explanation mechanism. The overall transmission chain structure layout is exactly opposite to the transmission layout described above. The multi-gear gear pair is placed at the rear end, and the input is The shaft gear 42, the intermediate shaft input gear A, the intermediate shaft input synchronizer A, the intermediate shaft input gear B, and the intermediate shaft input synchronizer B are disposed at the front end, and the CVT continuously variable transmission function is to change the intermediate shaft A and the intermediate shaft B rotation speed. Therefore, as long as it is disposed on the intermediate shaft A and the intermediate shaft B, it can be disposed at the front end (as shown in FIG. 25) or at the rear end. This type of design has the advantages that during the shifting of the transmission full gear position, The double countershaft and CVT speeds are always cyclically shifted within a small range. Unlike the previous type, as the gear position increases, the intermediate shaft and CVT speeds continue to rise as the gear position rises like a stair. The dynamic logic of the shifting shift is explained as follows:

Figure 25 shows the first gear step of the double countershaft cycle shifting CCT. At this time, the intermediate shaft input synchronizer B (44) and the first gear synchronizer (51) are combined, and the transmission power flows through the gear and the intermediate shaft. B is transmitted. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission is equal to 1, as shown in the right figure, the intermediate shaft is input to the synchronizer A (46). The combination sleeve and the combined tooth speed are synchronized to prepare for the next stepless speed change.

Figure 26 shows the double intermediate shaft cyclic shift type CCT from the first gear to the second gear stepless shifting process. At this time, the intermediate shaft input synchronizer A (46) and the first gear synchronizer (51) are combined, and the transmission power flow passes through the CVT. The continuously variable transmission is transmitted. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition, when the CVT continuously variable transmission When the transmission ratio reaches the minimum, as shown in the figure on the right, the speed of the intermediate shaft B reaches the maximum speed, and the speed of the output shaft 24 is raised, and the combined sleeve of the second-speed synchronizer and the combined gear speed are synchronized, so that the second gear is used for the next step. Ready.

As shown in Fig. 27, the double countershaft cyclic shift type CCT second gear pair works. At this time, the intermediate shaft input synchronizer A (46) and the second speed synchronizer are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft A. The path indicated by the two-dot chain line in the figure is the current power flow path. At this time, the intermediate shaft B and the CVT continuously variable transmission are in an idle state, and the CVT transmission ratio can be easily and quickly adjusted to 1, as shown in the right figure. At the same time, the intermediate shaft B is decelerated to be synchronized with the intermediate shaft A, and the joint sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized to prepare for the next stepless shifting.

Figure 28 shows the double intermediate shaft cyclic shift type CCT from the second gear to the third gear stepless shifting process. At this time, the intermediate shaft input synchronizer B and the second gear synchronizer are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission. The path indicated by the two-dot chain line in the drawing is the current power flow path. At this time, the transmission ratio of the CVT continuously variable transmission can be steplessly changed according to the current working condition requirement. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, As shown in the figure on the right, the speed of the intermediate shaft A reaches the maximum speed, and the speed of the output shaft 24 is further increased, and the combined sleeve of the third-speed synchronizer and the combined gear speed are synchronized, so that the third gear is ready for the next step.

As shown in Fig. 29, the double countershaft cyclic shift type CCT three-speed gear pair works. At this time, the intermediate shaft input synchronizer B and the third-speed synchronizer are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft B. The path indicated by the two-dot chain line is the current power flow path. At this time, the intermediate shaft A and the CVT continuously variable transmission can adjust the CVT transmission ratio to 1 easily and quickly, as shown in the right figure. The shaft A is decelerated to be synchronized with the intermediate shaft B, and the coupling sleeve of the intermediate shaft output synchronizer A and the combined tooth speed are synchronized to prepare for the next stepless shifting.

The working principle of other gears is the same as above, and will not be repeated one by one. Obviously: During the shifting of different gears, the double intermediate shaft and CVT are always in the first to second speed range of cycle speed increase and deceleration, but the output shaft speed increases with the gear position.

Figure 30-35: Schematic diagram of the CCT second-type shift logic explanation mechanism. The transmission is basically the same as the transmission described in Fig. 2, except that the shift logic program is different, but the same stepless shifting effect can be achieved. The specific analysis is as follows:

For clarity of analysis, the path through which the power flow passes through the CVT is indicated by a two-dot chain line, and the path through which the power flow passes through the gear or direct path is indicated by a chain line.

Figure 30 shows the CCT first gear pair working state. At this time, the first gear synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft A, as indicated by the dotted line in the drawing. The path is the current power flow path. At this time, the initial state transmission of the CVT continuously variable transmission is as shown in the right figure, the intermediate shaft B speed reaches the maximum speed under the current gear position, and the combined sleeve of the second speed synchronizer and the combined tooth speed are synchronized. The second gear can be put into the waiting state in advance, and the path indicated by the two-dot chain line in the drawing is the CVT path in which the current power flow is simultaneously ready to be turned on.

Note: In the dual power flow path state in which both the gear path and the CVT path are turned on, in order to prevent motion interference of the dual power flow path and protect the CVT and improve the transmission efficiency, it is generally possible to adopt: if the current gear position does not enter the upcoming shifting In the preparatory state, the gear gear is preferentially transmitted, and the CVT path can be cut off at this time. As shown in Fig. 30, the second-speed synchronizer can be disconnected first.

Figure 31 shows the CCT from the first gear to the second gear stepless speed change process. Since the combined sleeve of the second gear synchronizer and the combined tooth speed have been synchronized in advance in the first gear, the second gear synchronizer can be combined directly or in advance. And disconnect the first gear synchronizer, the transmission power flow is transmitted through the CVT continuously variable transmission that has already been turned on, as shown by the two-dot chain line in the drawing. At this time, the transmission ratio of the CVT continuously variable transmission can be based on the current The working condition demand changes steplessly. When the transmission ratio of the CVT continuously variable transmission reaches the neutral position, as shown in the right figure, the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized, and after combining, the power flow path is changed. Driven by the second gear pair, as shown by the dotted line in the figure.

Figure 32 shows the CCT from the second gear to the third gear stepless speed change process, disconnecting the intermediate shaft output synchronizer B, so that the CVT continuously variable transmission continues to increase speed, and the power flow path at this time is the path indicated by the double dotted line. When the CVT transmission ratio reaches the minimum, as shown in the figure on the right, the combination of the three-speed synchronizer and the combined tooth speed are synchronized. After the combination, the power flow path is changed to be driven by the third gear pair, as shown by the dotted line. The path shown.

Figure 33 shows the CCT from the third gear to the fourth gear stepless speed change preparation process. At this time, the third gear synchronizer and the intermediate shaft output synchronizer A are combined to disconnect the second gear synchronizer B, the intermediate shaft B and the CVT continuously variable transmission. In the no-load state, the CVT transmission ratio can be easily and quickly restored to the initial position. As shown in the figure on the right, the CCT is ready for the third-speed to fourth-speed stepless speed change. The current gear position is still the third gear gear pair working state. The rotation speed of the intermediate shaft B reaches the maximum speed under the current gear position. The combination of the four-speed synchronizer and the combined tooth speed are synchronized, and the four-speed advance can be entered into the waiting state. The path indicated by the two-dot chain line in the drawing is the current The power flow is simultaneously prepared for the CVT path to be turned on.

Figure 34 shows the CCT from the third-speed to the fourth-speed stepless speed change process. Since the combination of the four-speed synchronizer and the combined tooth speed have been synchronized in advance in the third gear, the four-speed synchronizer can be combined directly or in advance. And disconnect the third-speed synchronizer, the transmission power flow is transmitted through the CVT continuously variable transmission that is ready to be turned on, as shown by the two-dot chain line in the figure. At this time, the transmission ratio of the CVT continuously variable transmission can be based on the current The working condition demand changes steplessly. When the transmission ratio of the CVT continuously variable transmission reaches the neutral position, as shown in the right figure, the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized, and after combining, the power flow path is changed. Driven by a four-speed gear pair, as shown by the dotted line in the figure.

Figure 35 shows the CCT from the fourth gear to the fifth gear (direct gear) stepless speed change process, disconnecting the intermediate shaft output synchronizer B, so that the CVT continuously variable transmission continues to increase speed, the power flow path at this time is a two-dot chain line In the path shown, when the CVT transmission ratio is at a minimum, as shown in the figure to the right, the combination of the five-speed (direct-speed) synchronizer and the combined tooth speed are synchronized. After the combination, the transmission power flow is directly transmitted through the input shaft and the output shaft. As shown in the dotted line shown in the figure, at this time, except for the input shaft and the output shaft, all transmission components of the transmission are in no-load state, and the transmission efficiency is close to 100%.

The analysis of Figures 36, 37, and 38 is described above (see the section described in Figure 1).

39-40: Schematic diagram of the transversely-predicted CCT meshing transmission continuously variable transmission assembly mechanism, as shown, the input shaft 84, the third and fourth gear input gears 74 connected to the input shaft, and the first and second gear input gears 75 4th intermediate shaft gear 73, intermediate shaft output gear B, CVT cone group B, third gear intermediate shaft gear 78, output large gear 79, intermediate shaft output gear A, CVT cone group A, direct gear pinion 82, The direct gear synchronizer 83, the differential 86 and the like are composed. The main difference from the previous longitudinal rear-drive transmission is the addition of a differential. To improve efficiency, the differential output large gear 79 is directly designed at the output shaft gear 21 position of the original rear-drive transmission, and the output shaft is directly driven by the wheel. Output half shaft 85, shortening the number of transmission chain stages and improving economy. Of course, if you need to enlarge the center-to-center distance of the gearbox input and output shafts, you can also increase the number of gear stages. In order to further improve the efficiency, the transmission also designs a direct gear. When the direct synchronizer 83 is combined, the power flow path is: the input shaft 84, the direct drive small sprocket 82, the transmission chain 87, the output large sprocket 88, and the engine. The output power is to drive the wheel, and the whole transmission chain has only one stage, and the transmission efficiency is high.

For the general car gearbox, there is an overspeed gear. In fact, as long as the gear ratio of the direct gear drive chain path is reduced, the direct gear is the overspeed gear, which satisfies the best economy and sportiness.

In order to avoid confusion of the drawing, part of the content is hidden in the drawing, and the direct-speed small sprocket 82 and the direct-speed synchronizer 83 on the right side of the double-dot chain line in the bottom view are hidden in the front view in FIG.

As an alternative embodiment, the direct-drive small sprocket of the above embodiment may be a direct-drive small pulley, the transmission chain may be a transmission belt, and the output large sprocket may be an output large pulley.

Claims

High-efficiency and long-life meshing transmission continuously variable transmission, which is characterized by: a combination of a gear transmission and a continuously variable transmission, combined with a gear transmission of a number of gears and a continuously variable transmission, and the power flow path can be made according to requirements For smooth switching, when the ideal transmission ratio of the transmission required for the current working condition is the gear gear ratio, the power flow path is preferentially transmitted by the gear; the ideal transmission ratio of the transmission required in the current working condition cannot be matched with the gear position. When the transmission ratio is matched, the power flow path is changed to the continuously variable transmission to transmit power.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein the input shaft is provided with gear input gears, and each input gear meshes with a corresponding output gear, and each output gear is alternated according to an even number and an odd number. Orderly distributed on the intermediate axis A and the intermediate shaft B on both sides to form the first, second, third and fourth gear pairs; the reverse gear can be driven by the traditional idler gear or the sprocket chain drive, each The gears have their own corresponding synchronizers; at the output ends of the intermediate shaft A and the intermediate shaft B, the intermediate shaft output gear A and the intermediate shaft output gear B are mounted, and mesh with the output shaft gear (21), and the output shaft gear (21) passes through the output. Axis (24) output power; cone set A and cone set B of CVT continuously variable transmission are installed on the double intermediate shaft A and the intermediate shaft B respectively, and the cone set A and the cone set B pass the continuously variable transmission belt or chain (25) Transfer power.
The high efficiency long life meshing transmission continuously variable transmission according to claim 1, wherein the speed ratio range of the continuously variable transmission is equal to or slightly larger than a speed ratio range between adjacent two gears. The synchronizer can remove the synchronizing ring; the continuously variable transmission can be an existing continuously variable transmission, a movable tooth meshing type continuously variable transmission, or a variable speed power or transmission device such as a speed regulating motor or an oil pump motor.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, characterized in that: a plurality of elastic return couplings and stabilizers are arranged on the transmission shaft, and the elastic reset coupling is in a no-load no-load state. The inner ring and the outer ring are automatically reset to the neutral state under the action of the elastic returning member, and a certain free rotation angle is ensured when the synthesizer coupling sleeve is combined with the combined tooth. The angle of the free rotation is: less than or equal to the synchronizer coupling sleeve and Combining a meshing pitch of the teeth;

The stabilizer is composed of an elastic buffer and an overload protection zone, including: a torque input end, a damping spring, an overload protection control block, an overload protection spring, and a torque output end. When the torque is within the normal working range, only the elastic buffer is provided. Function, if the torque exceeds the normal working allowable range, the overload protection control block separates to achieve safety protection; the stabilizer can also be set only with elastic buffer, consisting of a drive plate, a driven plate, and an elastic connecting element, wherein the elastic connecting element It can be designed as two-way damping and one-way damping type, which can include: torque input shaft, positioning lands, two-way damper spring, torque input disk, etc. Its elastic cushioning damping component can be metal spring, non-metal spring, gas. Springs, hydraulic springs, hydraulic dampers, etc.

The stabilizer can also have the function of elastic return coupling. The stabilizer and the elastic reset coupling can be separated and set independently, or can be combined with the integrated setting, and the stabilizer and cone with the function of elastic reset coupling can also be used. Disc integrated design; flexible couplings, stabilizers can also be simplified or removed.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein the shifting dynamic logic relationship of the CCT meshing transmission continuously variable transmission is: a gear pair of the CCT meshing transmission continuously variable transmission, The first gear synchronizer and the intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft A. The transmission ratio of the CVT continuously variable transmission is equal to 1, and the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized;

CCT meshing transmission continuously variable transmission from first gear to second gear stepless speed change process, first gear synchronizer, intermediate shaft output synchronizer B combined, transmission power flow is transmitted through CVT continuously variable transmission, when the transmission ratio of CVT continuously variable transmission reaches At the lowest hour, the intermediate shaft B speed reaches the maximum speed under the current gear position, and the combined sleeve of the second-speed synchronizer and the combined tooth speed are synchronized;

The CCT meshing transmission continuously variable transmission second gear pair works, the second gear synchronizer and the intermediate shaft output synchronizer B are combined, the transmission power flow is transmitted through the gear and the intermediate shaft B, and the intermediate shaft A and the CVT continuously variable transmission are in an idle state. The CVT transmission ratio is adjusted to 1, the intermediate shaft A is accelerated to be synchronized with the intermediate shaft B, and the combined sleeve of the intermediate shaft output synchronizer A and the combined tooth speed are synchronized;

CCT meshing drive continuously variable transmission from second gear to third gear stepless speed change process, second gear synchronizer, intermediate shaft output synchronizer A combined, transmission power flow is transmitted through CVT continuously variable transmission, CVT continuously variable transmission achieves the most transmission ratio Hours, the intermediate shaft A speed reaches the maximum speed under the current gear position, and the combined sleeve of the third-speed synchronizer and the combined tooth speed are synchronized;

CCT meshing transmission continuously variable transmission third gear pair work, three-speed synchronizer, intermediate shaft output synchronizer A combined, transmission power flow through the gear and intermediate shaft A transmission, CVT transmission ratio is adjusted to 1, intermediate shaft B speed up to Synchronizing with the intermediate shaft A, the coupling sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized;

The CCT meshing transmission continuously variable transmission is composed of a three-speed four-speed stepless speed change process, a three-speed synchronizer and an intermediate shaft output synchronizer B. The transmission power flow is transmitted through the CVT continuously variable transmission, and the transmission ratio of the CVT continuously variable transmission is minimized. The rotation speed of the intermediate shaft B reaches the maximum speed under the current gear position, and the combined sleeve of the fourth-speed synchronizer and the combined tooth speed are synchronized;

The CCT meshing transmission continuously variable transmission has four gears, the fourth gear synchronizer and the intermediate shaft output synchronizer B. The transmission power flow is transmitted through the gear and the intermediate shaft B. The CVT transmission ratio is adjusted to 1, and the intermediate shaft A is speeded up. Synchronous with the intermediate shaft B, the coupling sleeve of the intermediate shaft output synchronizer A and the combined tooth speed are synchronized;

The CCT meshing transmission continuously variable transmission is a four-speed to five-speed stepless speed change process, a four-speed synchronizer and an intermediate shaft output synchronizer A are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission, when the transmission ratio of the CVT continuously variable transmission is reached. At the lowest hour, the intermediate shaft A speed reaches the maximum speed under the current gear position, and the combined gear of the fifth gear (direct gear) synchronizer and the combined tooth speed are synchronized;

CCT meshing drive continuously variable transmission five-speed (direct gear) operation, five-speed (direct gear) synchronizer combination, transmission power flow through the input shaft (1), output shaft (24) for direct transmission, except the input shaft (1), Outside the output shaft (24), all transmission components of the transmission are in no-load condition, and the transmission efficiency is close to 100%;

The direct gear is not the most advanced CCT mechanism: the output gear components are divided into two groups, including: split output shaft gear A, split output shaft gear B, and add separate output shaft synchronizer between them (27) The dynamic logic of the shift is:

CCT meshing transmission continuously variable transmission from five-speed (direct gear) to six-speed stepless speed change process, five-speed (direct gear) synchronizer, intermediate shaft output synchronizer A, intermediate shaft output synchronizer B, separate output shaft synchronization The device (27) is disconnected, and the transmission power flow is transmitted through the CVT continuously variable transmission. When the transmission ratio of the CVT continuously variable transmission reaches the minimum, the intermediate shaft A speed reaches the maximum speed under the current gear position, and the combination of the six-speed synchronizer and Combined tooth speed synchronization;

CCT meshing transmission continuously variable transmission six gear pair work, six-speed synchronizer, intermediate shaft output synchronizer A combined, transmission power flow through the gear and intermediate shaft A transmission, CVT transmission ratio remains the same value, five gears (direct Synchronizer, intermediate shaft output synchronizer B are kept in combination, combined with tooth synchronization, separate output shaft synchronizer (27) is disconnected, or: five-speed (direct) synchronizer, intermediate shaft output synchronizer B One can choose one to combine;

The control mode of the downshifting is: the CVT is slightly reversely accelerated, and the intermediate shaft A is slightly slightly higher than the intermediate shaft B. The coupling sleeve of the intermediate shaft output synchronizer A and the combined teeth actively participate in the load, while the middle The coupling sleeve of the shaft output synchronizer B is automatically unloaded with the combined teeth, and at the same time, the intermediate shaft output synchronizer B is separated, and after the switching of the power flow path is completed, the CVT starts to decelerate.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein the CVT continuously variable transmission is disposed at an intermediate position between the multi-gear gear set and the output gear pair, and the stabilizer (31) can be embedded. The structure is integrated with the cone and disc, and the structure is compact, and the force is symmetric and uniform. The in-line stabilizer (31) can have the function of elastic reset coupling;

Or: the input gears of the first and second gear pairs are shared, the input gears of the third and fourth gear pairs are common, and the output gear pairs of different speed ratios are set, the small gear ratio output gear pair (38), the large speed ratio Output gear pair (39);

It can also be: the small speed ratio output gear pair (38) and the large speed ratio output gear pair (39) are combined in the axial space combined output shaft gear, and the combined sleeve of the corresponding synchronizer is obtained by adjusting the different speed ratios of the CVT. Combined tooth speed synchronization;

Or: The CVT continuously variable transmission is placed at the front end of the transmission. The elastic return coupling on the synchronizer adopts an in-line elastic resetter (40) structure, and the output shaft (1) and the output shaft (24) are set as coaxial holes. Axis combined setting scheme (41); the spatial layout of the input, output shaft, and double intermediate shaft is set to a triangular relationship.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein the CCT including the CVT intermediate gear gear increases the intermediate transmission gear set, the intermediate intermediate shaft output synchronizer A, and the middle intermediate The shaft output gear A, the neutral output gear, the neutral intermediate shaft output synchronizer B, and the intermediate intermediate shaft output gear B, the shifting dynamic logic relationship is:

The first gear pair of CCT continuously variable transmission with CVT medium gear is working. The first gear synchronizer and the low intermediate shaft output synchronizer A are combined. The transmission power flow is transmitted through the gear and intermediate shaft A. The transmission of CVT continuously variable transmission The ratio is equal to 1, the combination of the low intermediate shaft output synchronizer B and the combined tooth speed are synchronized;

CCT continuously variable transmission with CVT neutral gear is combined with 1st gear to 1.5th stepless speed change, 1st gear synchronizer, low intermediate shaft output synchronizer B, transmission power flow is transmitted through CVT continuously variable transmission, when CVT is not available When the transmission ratio of the stage transmission reaches the neutral position, the combination sleeve of the neutral intermediate shaft output synchronizer A and the combined tooth speed are synchronized;

The 1.5-speed gear pair of the CCT CVT with CVT medium gear is working. The first-speed synchronizer and the neutral intermediate-shaft output synchronizer A are combined. The transmission power flow is transmitted through the gear and the intermediate shaft A. The CVT transmission ratio remains the same. The median is unchanged to ensure that the combined sleeve of the low intermediate shaft output synchronizer B and the combined tooth speed remain synchronized;

The CCT continuously variable transmission with CVT intermediate gear is composed of 1.5-speed to 2-speed stepless speed change, 1 speed synchronizer and low intermediate shaft output synchronizer B. Transmission power flow is transmitted through CVT continuously variable transmission, CVT is stepless. When the transmission ratio of the transmission reaches the minimum, the intermediate shaft B speed reaches the maximum speed under the current gear position, and the combined sleeve of the second-speed synchronizer and the combined tooth speed are synchronized;

The 2nd gear pair of CCT continuously variable transmission with CVT medium gear is working. The 2nd synchronizer and the low intermediate shaft output synchronizer B are combined. The transmission power flow is transmitted through the gear and intermediate shaft B. The intermediate shaft A and CVT are not. In the no-load state, the CVT transmission ratio is adjusted to 1, the intermediate shaft A is speeded up to be synchronized with the intermediate shaft B, and the coupling sleeve of the low intermediate shaft output synchronizer A and the combined tooth speed are synchronized;

The CCT continuously variable transmission with CVT neutral gear is combined from the 2nd gear to the 2.5th stepless speed change, the 2nd gear synchronizer and the low intermediate shaft output synchronizer A. The transmission power flow is transmitted through the CVT continuously variable transmission, and the CVT is stepless. The transmission ratio of the transmission reaches the neutral position, and the combined sleeve of the intermediate intermediate shaft output synchronizer B and the combined tooth speed are synchronized;

The 2.5-speed gear pair of the CCT CVT with CVT medium gear is working. The 2nd synchronizer and the intermediate intermediate shaft output synchronizer B are combined. The transmission power flow is transmitted through the gear and the intermediate shaft B. The CVT transmission ratio remains the same. The median is unchanged to ensure that the combined sleeve and the combined tooth speed of the low intermediate shaft output synchronizer A are still synchronized; the CCT continuously variable transmission with the CVT neutral gear can also be continuously variable transmission through the intermediate gear pair path;
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein: the multi-gear gear pair is disposed at the rear end, and the input shaft gear (42), the intermediate shaft input gear A, and the intermediate shaft input are synchronized. The A, the intermediate shaft input gear B, and the intermediate shaft input synchronizer B are disposed at the front end, and the dynamic logic relationship of the shift shift is:

The first countershaft shifting CCT has a gear pair working state, the intermediate shaft input synchronizer B (44) and the first gear synchronizer (51) are combined, and the transmission power flow is transmitted through the gear and the intermediate shaft B. The CVT continuously variable transmission The transmission ratio is equal to 1, the coupling of the intermediate shaft input synchronizer A (46) and the combined tooth speed are synchronized;

The double intermediate shaft cyclic shift type CCT is a two-speed stepless speed change process. The intermediate shaft input synchronizer A (46) and the first speed synchronizer (51) are combined, and the transmission power flow is transmitted through the CVT continuously variable transmission. When the transmission ratio of the step-variable transmission reaches the minimum, the rotation speed of the intermediate shaft B reaches the maximum rotation speed, and the rotation speed of the output shaft (24) is raised to achieve the synchronization of the combined sleeve of the second-speed synchronizer and the combined tooth speed;

Double countershaft cyclic shift CCT second gear pair work, intermediate shaft input synchronizer A (46), second gear synchronizer combination, transmission power flow through the gear and intermediate shaft A transmission, intermediate shaft B and CVT continuously variable transmission In the no-load state, the CVT transmission ratio is adjusted to 1, the intermediate shaft B is decelerated to be synchronized with the intermediate shaft A, and the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized;

The double intermediate shaft cyclic shift type CCT is composed of the second gear to the third gear stepless speed change process, the intermediate shaft input synchronizer B and the second gear synchronizer are combined, the transmission power flow is transmitted through the CVT continuously variable transmission, and the transmission ratio of the CVT continuously variable transmission is reached. At the very least, the intermediate shaft A speed reaches the maximum speed, and the rotation speed of the output shaft (24) is further increased, and the combined sleeve of the third-speed synchronizer and the combined tooth speed are synchronized;

Double countershaft cycle shifting CCT third gear pair work, intermediate shaft input synchronizer B, third gear synchronizer combination, transmission power flow is transmitted through gear and intermediate shaft B, intermediate shaft A and CVT continuously variable transmission in no-load state The CVT transmission ratio is adjusted to 1, the intermediate shaft A is decelerated to be synchronized with the intermediate shaft B, and the combined sleeve of the intermediate shaft output synchronizer A and the combined tooth speed are synchronized.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein the shifting shift dynamic logic relationship is: CCT first gear gear pair working state, first gear synchronizer, intermediate shaft output synchronizer A combined The transmission power flow is transmitted through the gear and the intermediate shaft A. The CVT continuously variable transmission maintains the initial transmission ratio, the intermediate shaft B speed reaches the maximum speed under the current gear position, and the combined speed of the second gear synchronizer and the combined tooth speed are synchronized. Advance into the second gear in advance to enter the waiting state;

CCT from the first gear to the second gear infinitely variable speed process, directly or in advance combined with the second gear synchronizer, and disconnects the first gear synchronizer, the transmission power flow is transmitted through the CVT continuously variable transmission that has already been ready to conduct, CVT continuously variable transmission The transmission ratio can be steplessly changed according to the current working condition. When the transmission ratio of the CVT continuously variable transmission reaches the neutral position, the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized, and after the combination, the power flow path is changed to Second gear gear transmission;

CCT from the second gear to the third gear stepless speed change process, disconnect the intermediate shaft output synchronizer B, so that the CVT continuously variable transmission continues to increase speed, when the CVT transmission ratio reaches the minimum, the combination of the third gear synchronizer and the combined tooth speed synchronization After the combination, the power flow path is changed to be driven by the third gear pair;

The CCT is prepared from the third gear to the fourth gear stepless speed change. The third gear synchronizer and the intermediate shaft output synchronizer A are combined to disconnect the second gear synchronizer B. The intermediate shaft B and the CVT continuously variable transmission are in an idle state, which can be quickly and easily The CVT transmission ratio is restored to the initial position, and the CCT is ready for the third gear to the fourth gear stepless speed change. The current gear position is still the third gear gear pair working state, and the intermediate shaft B speed reaches the maximum speed under the current gear position. The combination of the four-speed synchronizer and the combined tooth speed synchronization can be inserted into the fourth gear in advance to enter the waiting state;

The CCT is a three-speed to four-speed stepless shifting process that combines the four-speed synchronizer directly or in advance, and disconnects the third-speed synchronizer. The transmission power flow is transmitted through the CVT continuously variable transmission that is ready to be turned on. The CVT continuously variable transmission The transmission ratio can be steplessly changed according to the current working condition. When the transmission ratio of the CVT continuously variable transmission reaches the neutral position, the combined sleeve of the intermediate shaft output synchronizer B and the combined tooth speed are synchronized, and after the combination, the power flow path is changed to Four-speed gear pair transmission;

CCT from the fourth gear to the fifth gear (direct gear) stepless speed change process, disconnect the intermediate shaft output synchronizer B, let the CVT continuously variable transmission continue to increase speed, when the CVT transmission ratio reaches the minimum, the fifth gear (direct gear) synchronizer The combined sleeve and the combined tooth speed are synchronized. After the combination, the transmission power flow is directly transmitted through the input shaft and the output shaft. Except for the input shaft and the output shaft, all transmission components of the transmission are in an idle state, and the transmission efficiency is close to 100%.
The high-efficiency long-life meshing transmission continuously variable transmission according to claim 1, wherein the transmission is a transversely mounted front drive CCT meshing transmission continuously variable transmission, and the input shaft (84) and the third and fourth gears connected to the input shaft are input. Gear (74), first and second gear input gear (75), fourth gear intermediate gear (73), intermediate shaft output gear B, CVT cone set B, third gear intermediate gear (78), output large gear (79 ), intermediate shaft output gear A, CVT cone group A, direct gear pinion (82), direct gear synchronizer (83), differential (86); differential output gear (79) is located in the original Drive the output shaft gear (21) position of the gearbox, the output shaft is the output half shaft (85) of the direct drive wheel, and is provided with a direct gear. When the direct gear synchronizer (83) is combined, the power flow path is: input The shaft (84), the direct gear pinion (82), and the output large gear (79) are driven by the engine output power to drive the wheels. The entire transmission chain has only one stage, and the transmission efficiency is close to 98%.