A power flow uninterrupted gear shift transmission

Abstract

The application discloses a power uninterrupted gear shifting transmission, and a plurality of clutch units are arranged through a first shaft, a second shaft and a third shaft in a power shifting module, wherein a fourth clutch is arranged on the first shaft, the fourth clutch is connected with a hollow shaft, a first gear set is arranged on the hollow shaft, the clutch units on the second shaft are combined with fifth to seventh clutch units on the third shaft through the first gear set, power is output, the clutch units are distributed and arranged through cooperation of three parallel shafts and the hollow shaft, twelve transmission gears and routes are provided for the transmission, the axial distance of the transmission shaft is reduced while the gears are increased, more gear numbers can make the speed change range of the vehicle wider and the output torque range larger, so that the vehicle can better adapt to various complex road conditions and working conditions, and meanwhile, power shifting can be realized in the working process, the vehicle does not appear power interruption, and the working efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of transmission technology and relates to a transmission with uninterrupted power shifting. Background Technology

[0002] With the rapid advancement of modernization, power shift transmissions have gradually entered the mainstream market and are increasingly widely used in agricultural machinery, mining machinery, construction machinery, and special vehicles. Compared with ordinary manual transmissions, power shift transmissions not only have more gears but also do not experience power interruption during gear shifts. They can adapt to a wider speed range and greater load variations, thus meeting the needs of complex road conditions and operating conditions.

[0003] In the field, OEMs primarily use power shift transmissions in road rollers, forklifts, bulldozers, graders, and loaders. It wasn't until 2010 that power shift transmissions began to be applied to high-horsepower tractors, achieving significant technological breakthroughs. Currently, some manufacturers are conducting research and application of power shift technology in tractors.

[0004] Among existing commercial vehicle transmissions, AT and CVT are too expensive, while other manual and automatic transmissions have too few gears, a small range of speed adjustment, and are only suitable for vehicles with lower horsepower, which is not suitable for the current needs of high-horsepower vehicles. This reduces the overall performance of the vehicle, has low applicability to different working conditions and road conditions, and is prone to power interruption during gear shifts. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of existing transmissions having few gears, a small speed adjustment range, and being unable to meet various working conditions, and being prone to power interruption during operation, by providing a transmission with uninterrupted power shifting.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A power-uninterrupted shift transmission, characterized in that it includes a power drive module, the output end of which is sequentially connected to a power shift module, a synchronous shift module, and a power reversing module, wherein the power reversing module is respectively connected to a front drive power take-off module and a rear drive power take-off module;

[0008] The power shift module includes a first shaft, a second shaft, and a third shaft that are distributed in parallel.

[0009] The input end of the first shaft is connected to the output end of the power drive module. A fourth clutch and a twelfth gear are axially arranged on the first shaft in sequence. The fourth clutch is connected to a hollow shaft.

[0010] The hollow shaft is provided with a first gear set. The second shaft is axially arranged with a first clutch unit, a second clutch unit, a third clutch unit and an eleventh gear in sequence. The first clutch unit, the second clutch unit and the third clutch unit are all engaged with the first gear set. The eleventh gear is engaged with the twelfth gear. The third shaft is axially arranged with a fifth clutch unit, a sixth clutch unit and a seventh clutch unit in sequence. The fifth clutch unit, the sixth clutch unit and the seventh clutch unit are all engaged with the first gear set. The output end of the third shaft is connected to the input end of the synchronizer shifting module.

[0011] A further improvement of the present invention is that:

[0012] The first gear set includes a second gear, a sixth gear, and a ninth gear arranged axially;

[0013] The first clutch unit engages the second gear and the fifth clutch unit in sequence;

[0014] The second clutch unit sequentially engages the sixth gear and the sixth clutch unit;

[0015] The third clutch unit engages the ninth gear and the seventh clutch unit in sequence.

[0016] The first clutch unit includes a first clutch, which is fixedly connected to a second shaft. The first clutch is connected to a first gear, which meshes with a second gear.

[0017] The second clutch unit includes a second clutch, which is fixedly connected to a second shaft. The second clutch is connected to a fourth gear, which meshes with a sixth gear through a fifth gear.

[0018] The third clutch unit includes a third clutch, which is fixedly connected to the second shaft. The third clutch is connected to the eighth gear, which meshes with the ninth gear.

[0019] The synchronizer shifting module includes a fourth axis and a fifth axis arranged in parallel.

[0020] The input end of the fourth axis is connected to the output end of the third axis, and the output end of the fourth axis is connected to the input end of the power reversing module.

[0021] The fourth shaft is axially arranged with the fourteenth gear, the first synchronizer, and the second gear set in sequence. The fifth shaft is axially arranged with the thirteenth gear, the second synchronizer unit, the third synchronizer unit, the fourth synchronizer unit, and the fifth synchronizer unit in sequence. The fourteenth gear meshes with the thirteenth gear, and the second synchronizer unit, the third synchronizer unit, the fourth synchronizer unit, and the fifth synchronizer unit all mesh with the second gear set.

[0022] The second gear set includes a sixteenth gear, an eighteenth gear, a twentieth gear, and a twenty-second gear arranged axially in sequence;

[0023] The second synchronizer unit meshes with the sixteenth gear, the third synchronizer unit meshes with the eighteenth gear, the fourth synchronizer unit meshes with the twentieth gear, and the fourth synchronizer unit meshes with the twenty-second gear.

[0024] The power reversing module includes a sixth axis and a seventh axis arranged in parallel.

[0025] The input end of the sixth shaft is connected to the output end of the synchronizer shift module 3. The sixth shaft is equipped with a clutch and a clutch, which is connected to the eighth shaft. The eighth shaft is equipped with a twenty-ninth gear, and the output end of the twenty-ninth gear is connected to the input end of the rear drive power take-off module.

[0026] The seventh shaft is equipped with a twenty-fifth gear and a twenty-eighth gear. The clutch engages with the twenty-fifth gear through the twenty-third gear and the twenty-fourth gear, and the twenty-eighth gear engages with the twenty-ninth gear.

[0027] The 25th gear is connected to the input end of the front drive power take-off module.

[0028] The front-drive power take-off module includes a 26th gear and a 27th gear that mesh sequentially, with the 27th gear connected to an 8th clutch.

[0029] The 26th gear meshes with the 25th gear.

[0030] The power drive module is an engine.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention discloses a power-uninterrupted shift transmission. In the power shift module, multiple clutch units are arranged via a first shaft, a second shaft, and a third shaft. A fourth clutch is mounted on the first shaft, connected to a hollow shaft. A first gear set is mounted on the hollow shaft. The clutch units on the second shaft engage with the fifth to seventh clutch units on the third shaft through the first gear set, outputting power. The clutch units are distributed and arranged through the cooperation of three parallel shafts and the hollow shaft, providing the transmission with twelve gear positions and routes. Increasing the number of gears reduces the axial distance of the transmission shaft. Furthermore, the increased number of gears allows for a wider range of vehicle speed variations and a larger torque output range, enabling the vehicle to better adapt to various complex road conditions and operating conditions. Power shifting can be performed during operation without power interruption, improving work efficiency. The transmission is modularly connected, allowing for the addition, removal, or modification of individual or multiple modules as needed, expanding the transmission's application range.

[0033] Furthermore, in this invention, the synchronizer module includes five synchronizer units, which can be selected to combine according to the working conditions to output different speeds. The five shift positions, combined with the twelve power transmission routes of the power shift module, realize more gears, achieving a wider speed range and load adaptability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the present invention.

[0036] The components are: 1-Power drive module; 2-Power shift module; 3-Synchronous shift module; 4-Front-wheel drive power take-off module; 5-Power reversing module; 6-Rear-wheel drive power take-off module; 7-First clutch; 8-Second clutch; 9-Third clutch; 10-Fourth clutch; 11-First gear; 12-Second gear; 13-Third gear; 14-Fourth gear; 15-Fifth gear; 16-Sixth gear; 17-Seventh gear; 18-Eighth gear; 19-Ninth gear; 20-Tenth gear; 21-Eleventh gear; 22-Twelfth gear; 23-Thirteenth gear; 24-Fourteenth gear; 25-Fifteenth gear. ; 26-Sixteenth gear; 27-Seventeenth gear; 28-Eighteenth gear; 29-Nineteenth gear; 30-Twentieth gear; 31-Twenty-first gear; 32-Twenty-second gear; 33-Twenty-third gear; 34-Twenty-fourth gear; 35-Twenty-fifth gear; 36-Twenty-sixth gear; 37-Twenty-seventh gear; 38-Twenty-eighth gear; 39-Twenty-ninth gear; 40-Fifth clutch; 41-Sixth clutch; 42-Seventh clutch; 43-First synchronizer; 44-Second synchronizer; 45-Third synchronizer; 46-Fourth synchronizer; 47-Fifth synchronizer; 48-Eighth clutch;

[0037] S1 - First axis; S2 - Second axis; S3 - Third axis; S4 - Fourth axis; S5 - Fifth axis; S6 - Sixth axis; S7 - Seventh axis; S8 - Eighth axis; S9 - Hollow axis. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0044] The present invention will now be described in further detail with reference to the accompanying drawings:

[0045] See Figure 1 This invention discloses a non-interrupted power shift transmission, which adopts a transmission system arrangement combining a power shift module (12 forward gears + 12 reverse gears) and a synchronous shift module (5 gears). This achieves a larger number of gears (12 forward gears x 5 + 12 reverse gears x 5), resulting in a wider speed range and better load adaptability. The synchronous shift module in this invention can adjust the vehicle speed over a large range to match different operational requirements, while the power shift module can adjust the vehicle speed within a smaller range, improving the driving experience and operability. The combined use of the two modules allows for smooth changes in vehicle speed over a wide range. Furthermore, this invention includes a front-wheel drive power take-off module and a rear-wheel drive power take-off module, ensuring four-wheel drive capability.

[0046] Example 1

[0047] This invention includes a power drive module 1, a power shift module 2, a synchronous shift module 3, and a power reversing module 5 connected in sequence. The power reversing module 5 is connected to a front-drive power take-off module 4 and a rear-drive power take-off module 6, respectively. The power shift module 2 includes a first shaft S1, a second shaft S2, and a third shaft S3 distributed in parallel. The input end of the first shaft S1 is connected to the output end of the power drive module 1. A fourth clutch 10 is disposed on the first shaft S1 and is fixedly connected to the first shaft S1. The fourth clutch 10 is connected to a hollow shaft S9, which is sleeved on the first shaft S1. A first gear set is disposed on the hollow shaft S9, and a twelfth gear 22 is disposed on the first shaft S1. The twelfth gear 22 is located at the end near the hollow shaft S9 and away from the fourth clutch 10. The second shaft S2 is axially arranged with the first clutch unit, the second clutch unit, the third clutch unit and the eleventh gear 21 in sequence. The first clutch unit, the second clutch unit and the third clutch unit are all meshed with the first gear set. The eleventh gear 21 meshes with the twelfth gear 22. The third shaft S3 is axially arranged with the fifth clutch unit, the sixth clutch unit and the seventh clutch unit in sequence. The fifth clutch unit, the sixth clutch unit and the seventh clutch unit are all meshed with the first gear set. The output end of the third shaft S3 is connected to the input end of the synchronizer shift module 3.

[0048] Example 2

[0049] Based on Embodiment 1, the first gear set in this embodiment includes a second gear 12, a sixth gear 16, and a ninth gear 19. The second gear 12, the sixth gear 16, and the ninth gear 19 are axially arranged on the hollow shaft S9 and are fixedly connected to the hollow shaft S9. The second shaft S2 is axially fixed with a first clutch 7, a second clutch 8, and a third clutch 9 in sequence. The third shaft S3 is axially fixed with a fifth clutch 40, a sixth clutch 41, and a seventh clutch 42 in sequence. The first clutch 7 is connected to the first gear 11, and the first gear 11 meshes with the second gear 12. The second gear 12 meshes with the third gear 13, and the third gear 13 is connected to the fifth clutch 40. The second clutch 8 is connected to the fourth gear 14, and the fourth gear 14 meshes with the fifth gear 15. The fifth gear 15 meshes with the sixth gear 16, and the sixth gear 16 meshes with the seventh gear 17. The seventh gear 17 is connected to the sixth clutch 41. The third clutch 9 is connected to the eighth gear 18, and the eighth gear 18 meshes with the ninth gear 19. The ninth gear 19 is connected to the seventh clutch 42.

[0050] Example 3

[0051] Based on the second embodiment, in this embodiment of the invention, the synchronizer shifting module 3 includes a fourth shaft S4 and a fifth shaft S5 distributed in parallel. The input end of the fourth shaft S4 is connected to the output end of the third shaft S3. A fourteenth gear 14, a sixteenth gear 26, an eighteenth gear 28, a twentieth gear 30, and a twenty-second gear 32 are axially fixed on the fourth shaft S4. The fourteenth gear 14 meshes with the thirteenth gear 23 provided on the fifth shaft S5. A second synchronizer 44 and a third synchronizer 45 are also sequentially provided on the fifth shaft S5. 5. The fourth synchronizer 46 and the fifth synchronizer 47, the second synchronizer 44 are connected to the fifteenth gear 25 via a spline, the fifteenth gear 25 meshes with the sixteenth gear 26, the third synchronizer 45 are connected to the seventeenth gear 27 via a spline, the seventeenth gear 27 meshes with the eighteenth gear 28, the fourth synchronizer 46 are connected to the nineteenth gear 29 via a spline, the nineteenth gear 29 meshes with the twentieth gear 30, and the fifth synchronizer 47 are connected to the twenty-first gear 31 via a spline, the twenty-first gear 31 meshes with the twenty-second gear 32.

[0052] Example 4

[0053] Based on the third embodiment, in this embodiment, the power reversing module 5 includes a sixth shaft S6 and a seventh shaft S7 arranged in parallel. The output end of the fourth shaft S4 is connected to the input end of the sixth shaft S6, and the output end of the sixth shaft S6 is connected to the input end of the rear drive power take-off module 6.

[0054] Specifically, clutches R and F are sequentially arranged axially on the sixth shaft S6. Clutch R is connected to the twenty-third gear 33, and clutch F is connected to the eighth shaft S8. The eighth shaft S8 is coaxially distributed with the sixth shaft S6. The twenty-ninth gear 39 is fixed on the eighth shaft S8. The twenty-fifth gear 35 and the twenty-eighth gear 38 are sequentially fixed axially on the seventh shaft S7. The twenty-fifth gear 35 meshes with the twenty-third gear 33 through the twenty-fourth gear 34, and the twenty-eighth gear 38 meshes with the twenty-ninth gear 39.

[0055] The front-drive power take-off module 4 includes a 26th gear 36 and a 27th gear 37 that mesh sequentially. The 27th gear 37 is connected to the 8th clutch 48, and the 26th gear 36 meshes with the 25th gear 35.

[0056] The power drive module 1 disclosed in this embodiment of the invention is an engine.

[0057] The transmission path principle of this invention embodiment:

[0058] 1. The engine's power is transmitted to the first shaft S1 in the power shift module 2;

[0059] 2. In the power shift module 2, any one of the first clutch 7, the second clutch 8, the third clutch 9, or the fourth clutch 10 can be engaged to transmit power to the third shaft S3 via gear meshing. Specifically, the first shaft S1 transmits power to the second shaft S2 via the twelfth gear 22 and the eleventh gear 21. The gears corresponding to the first clutch 7, the second clutch 8, or the third clutch 9 on the second shaft S2 transmit power to the hollow shaft S9. The hollow shaft S9 transmits power to the fifth clutch 40, the sixth clutch 41, or the seventh clutch 42 on the third shaft S3 via the second gear 12, the sixth gear 16, or the ninth gear 19. The fourth clutch 10 transmits power to the third shaft S3 via the hollow shaft S9.

[0060] In the power shift module 2, when selecting a gear, only one of the first clutch 7 to the fourth clutch 10 is allowed to engage, and only one of the fifth clutch 40 to the seventh clutch 42 is allowed to engage simultaneously with it. As can be seen, the power shift module 2 has a total of 4X3 power transmission routes, that is, it can output 12 speeds under a single input.

[0061] The power shift module 2 transmits power to the synchronous shift module 3 via the third shaft S3;

[0062] 3. Any one of the five synchronizers in the synchronous shift module 3 can be combined (i.e., only one can be combined). As can be seen here, the synchronous shift module 3 can output 5 speeds under a single input.

[0063] Synchronous shift module 3 transmits power to power reversal module 5 via fourth shaft S4;

[0064] Either of the R / F clutches in the power reversing module 5 can be engaged (only one of the two is allowed); thus, it can be seen that the power reversing module 5 can output two speeds under a single input.

[0065] Power reversing module 5 transmits power to rear drive power take-off module 6 via the eighth shaft S8;

[0066] At the same time, the power is transmitted to the front drive power take-off module 4 by the intermediate shaft gear on the R clutch side of the power reversing module 5; when the F clutch is engaged, the front drive power take-off module 4 also has power input.

[0067] At this point, the engine's power has been transmitted to the two drive modules, and the operation is complete.

[0068] As can be seen from the above, the embodiments of the present invention provide a total of 4x3x5x2 power transmission routes, which have a wider speed coverage and better applicability to working conditions compared to common transmissions. The embodiments of the present invention provide more gears, which not only allows for a wider range of vehicle speed changes and a larger range of output torque, but also enables the vehicle to better adapt to various complex road conditions and working conditions. Power shifting can be realized during operation to prevent power interruption and improve work efficiency. The modular design allows for the addition, subtraction or modification of single or multiple modules according to specific needs, thus expanding the application range of the transmission.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power-uninterrupted shifting transmission, characterized in that, It includes a power drive module (1), the output end of which is connected in sequence to a power shift module (2), a synchronous shift module (3) and a power reversing module (5), and the power reversing module (5) is connected to a front drive power take-off module (4) and a rear drive power take-off module (6). The power shift module (2) includes a first shaft (S1), a second shaft (S2) and a third shaft (S3) that are distributed in parallel. The input end of the first shaft (S1) is connected to the output end of the power drive module (1). The first shaft (S1) is provided with a fourth clutch (10) and a twelfth gear (22) arranged axially in sequence. The fourth clutch (10) is connected to the hollow shaft (S9). The hollow shaft (S9) is provided with a first gear set, and the second shaft (S2) is provided with a first clutch unit, a second clutch unit, a third clutch unit and an eleventh gear (21) in axial sequence. The first clutch unit, the second clutch unit and the third clutch unit are all meshed with the first gear set. The eleventh gear (21) is meshed with the twelfth gear (22). The third shaft (S3) is provided with a fifth clutch unit, a sixth clutch unit and a seventh clutch unit in axial sequence. The fifth clutch unit, the sixth clutch unit and the seventh clutch unit are all meshed with the first gear set. The output end of the third shaft (S3) is connected to the input end of the synchronizer shift module (3). The power reversing module (5) includes a sixth shaft (S6) and a seventh shaft (S7) arranged in parallel. The input end of the sixth shaft (S6) is connected to the output end of the synchronizer shift module (3). The sixth shaft (S6) is equipped with a clutch one (R) and a clutch two (F). The clutch two (F) is connected to the eighth shaft (S8). The eighth shaft (S8) is equipped with a twenty-ninth gear (39). The output end of the twenty-ninth gear (39) is connected to the input end of the rear drive power take-off module (6). The seventh shaft (S7) is provided with a twenty-fifth gear (35) and a twenty-eighth gear (38). The clutch one (R) meshes with the twenty-fifth gear (35) through the twenty-third gear (33) and the twenty-fourth gear (34), and the twenty-eighth gear (38) meshes with the twenty-ninth gear (39). The 25th gear (35) is connected to the input end of the front drive power take-off module (4); The front drive power take-off module (4) includes a 26th gear (36) and a 27th gear (37) that mesh in sequence, and the 27th gear (37) is connected to an 8th clutch (48). The 26th gear (36) meshes with the 25th gear (35).

2. The uninterrupted power shifting transmission according to claim 1, characterized in that, The first gear set includes a second gear (12), a sixth gear (16), and a ninth gear (19) arranged axially. The first clutch unit sequentially engages the second gear (12) and the fifth clutch unit; The second clutch unit sequentially engages the sixth gear (16) and the sixth clutch unit; The third clutch unit engages the ninth gear (19) and the seventh clutch unit in sequence.

3. The uninterrupted power shifting transmission according to claim 2, characterized in that, The first clutch unit includes a first clutch (7), which is fixedly connected to a second shaft (S2). The first clutch (7) is connected to a first gear (11), which meshes with a second gear (12).

4. The uninterrupted power shifting transmission according to claim 2, characterized in that, The second clutch unit includes a second clutch (8), which is fixedly connected to the second shaft (S2). The second clutch (8) is connected to a fourth gear (14), which meshes with a sixth gear (16) through a fifth gear (15).

5. A power-uninterrupted shifting transmission according to claim 2, characterized in that, The third clutch unit includes a third clutch (9), which is fixedly connected to the second shaft (S2). The third clutch (9) is connected to the eighth gear (18), which meshes with the ninth gear (19).

6. The uninterrupted power shifting transmission according to claim 1, characterized in that, The synchronizer shifting module (3) includes a fourth axis (S4) and a fifth axis (S5) arranged in parallel. The input end of the fourth shaft (S4) is connected to the output end of the third shaft (S3), and the output end of the fourth shaft (S4) is connected to the input end of the power reversing module (5). The fourteenth gear (24), the first synchronizer (43), and the second gear set are arranged axially in sequence on the fourth shaft (S4). The thirteenth gear (23), the second synchronizer unit, the third synchronizer unit, the fourth synchronizer unit, and the fifth synchronizer unit are arranged axially in sequence on the fifth shaft (S5). The fourteenth gear (24) meshes with the thirteenth gear (23). The second synchronizer unit, the third synchronizer unit, the fourth synchronizer unit, and the fifth synchronizer unit all mesh with the second gear set.

7. A power-uninterrupted shifting transmission according to claim 6, characterized in that, The second gear set includes a sixteenth gear (26), an eighteenth gear (28), a twentieth gear (30), and a twenty-second gear (32) arranged axially in sequence. The second synchronizer unit meshes with the sixteenth gear (26), the third synchronizer unit meshes with the eighteenth gear (28), the fourth synchronizer unit meshes with the twentieth gear (30), and the fourth synchronizer unit meshes with the twenty-second gear (32).

8. A power-uninterrupted shifting transmission according to any one of claims 1-7, characterized in that, The power drive module (1) is an engine.

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