Auxiliary gear shifting device for AMT gearbox and using method of auxiliary gear shifting device

Abstract

The invention provides an auxiliary gear shifting device for an AMT gearbox and a using method thereof.The auxiliary gear shifting device is used for an automobile power system, and the power system comprises an engine, a clutch assembly, the auxiliary gear shifting device and the AMT gearbox which are sequentially connected; the auxiliary gear shifting device comprises an input shaft, an output shaft, a one-way clutch, a braking sliding gear sleeve and a friction brake used for reducing the speed of the input shaft, the input shaft is connected with a clutch assembly, the output shaft is connected with the AMT gearbox, and the input shaft and the output shaft are connected through the one-way clutch or switched to be connected in a co-rotating mode. The braking sliding gear sleeve can move to apply acting force to the friction brake or cancel the acting force to the friction brake. According to the invention, the power interruption time of gear shifting of the AMT gearbox is shortened; the system is additionally arranged between an original vehicle clutch ladle shell and an AMT gearbox, and an original vehicle clutch and AMT gearbox system does not need to be changed.

Description

Technical Field

[0001] The present invention relates to the field of automobile power technology, and in particular to an auxiliary shifting device for an AMT transmission and a use method thereof. Background Art

[0002] The car needs to frequently shift up or down during driving. During the shifting up or down process, the AMT transmission needs to first disengage or disconnect the clutch, then shift and engage the gears, and then close the clutch after the gears are engaged, so that the power can be transmitted to the wheels through the clutch. In the above process, the clutch disengagement process causes power interruption, which makes the car feel frustrated during driving; in addition, due to the inertia of the engine, the engine slows down and the shifting time is long, which also causes power interruption. The longer the power interruption process, the greater the negative impact on the driving performance and driving comfort of the car. Summary of the invention

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide an auxiliary shifting device for an AMT gearbox and a method of using the same, wherein the clutch can remain closed during gear shifting and does not need to participate in the gear shifting process, and the clutch is only used when the engine is started; at the same time, the engine deceleration process is accelerated, which greatly improves the sense of frustration caused by power interruption during gear shifting of the traditional AMT gearbox, shortens the power interruption time of the AMT gearbox shifting, and improves driving comfort; the present invention is suitable for vehicles with AMT gearboxes and front-engine rear-wheel drive, and the system is installed between the original vehicle clutch shell and the AMT gearbox, without changing the original vehicle clutch and AMT gearbox system, which greatly reduces production investment and upgrading and transformation costs.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An auxiliary shifting device for an AMT gearbox, the auxiliary shifting device is used in an automobile power system, the power system comprises an engine, a clutch assembly, an auxiliary shifting device and an AMT gearbox connected in sequence, the power of the engine is transmitted to wheels through the clutch assembly, the auxiliary shifting device and the AMT gearbox in sequence, the clutch assembly comprises a clutch, the auxiliary shifting device comprises an input shaft, an output shaft and a one-way clutch, the input shaft and the output shaft are connected through the one-way clutch or switched to be connected in a co-rotating manner, during upshifting and forced downshifting, the clutch is closed, the input shaft and the output shaft are connected through the one-way clutch, and during coasting downshifting, the input shaft and the output shaft are connected in a co-rotating manner.

[0006] As a further improvement of the above technical solution:

[0007] The auxiliary shifting device also includes a brake sliding gear sleeve and a friction brake for reducing the speed of the input shaft. The input shaft is connected to the clutch assembly, and the output shaft is connected to the AMT gearbox. The brake sliding gear sleeve can be moved to apply force to the friction brake or cancel the force on the friction brake.

[0008] The auxiliary shifting device also includes an input shaft connecting gear sleeve, an output shaft connecting gear sleeve and a sliding gear sleeve. One end of the input shaft connecting gear sleeve is fixedly connected to the input shaft, and the other end is connected to the outer ring of the one-way clutch. One end of the output shaft connecting gear sleeve is connected to the inner ring of the one-way clutch, and the other end is fixedly connected to the output shaft. The sliding gear sleeve is engaged with the input shaft connecting gear sleeve alone or moves to engage with the input shaft connecting gear sleeve and the output shaft connecting gear sleeve at the same time.

[0009] The input shaft connecting gear sleeve is located between the braking sliding gear sleeve and the output shaft connecting gear sleeve. When the sliding gear sleeve moves toward one end close to the braking sliding gear sleeve, the sliding gear sleeve disengages from the output shaft connecting gear sleeve, contacts the braking sliding gear sleeve and applies force to it; when the sliding gear sleeve moves toward one end close to the output shaft connecting gear sleeve, the sliding gear sleeve disengages from the braking sliding gear sleeve and simultaneously engages the input shaft connecting gear sleeve and the output shaft connecting gear sleeve; when the sliding gear sleeve neither applies force to the braking sliding gear sleeve nor engages with the output shaft connecting gear sleeve, the sliding gear sleeve only engages with the input shaft connecting gear sleeve.

[0010] The input shaft connecting gear sleeve is cylindrical, the output shaft connecting gear sleeve is cylindrical, the outer side surface of the output shaft connecting gear sleeve with the largest outer diameter and the outer side surface of the input shaft connecting gear sleeve with the largest outer diameter are located on the same cylindrical side surface, the sliding gear sleeve is cylindrical, the inner side surface of the sliding gear sleeve is meshed with the outer side surface of the input shaft connecting gear sleeve with the largest outer diameter, or is meshed with the outer side surface of the input shaft connecting gear sleeve with the largest outer diameter and the outer side surface of the output shaft connecting gear sleeve with the largest outer diameter at the same time.

[0011] The outer ring of the one-way clutch is connected to an inner side surface of the input shaft connecting gear sleeve, the inner ring of the one-way clutch is connected to an outer side surface of the output shaft connecting gear sleeve, and the inner side of the output shaft connecting gear sleeve is fixedly connected to the output shaft.

[0012] The auxiliary shifting device also includes a shift fork, which is sleeved on the outer side of the sliding gear sleeve. The shift fork drives the sliding gear sleeve to move along the center line direction of the input shaft connecting gear sleeve or the output shaft connecting gear sleeve.

[0013] The friction brake comprises a plurality of friction plates and a plurality of steel plates, wherein the friction plates are fixedly connected to the input shaft, and the steel plates are relatively fixed to the housing of the auxiliary shifting device.

[0014] A method for using an auxiliary shifting device, wherein the auxiliary shifting device is based on the above structure, the auxiliary shifting device cooperates with an AMT transmission to shift gears, and the clutch of the clutch assembly remains in a closed state during the shifting process.

[0015] When the AMT transmission needs to upshift or force downshift, the one-way clutch is first activated, the input shaft is connected to the output shaft through the one-way clutch, and then the gear shift operation is performed. During the gear shift operation, the upshift process is assisted by the friction brake to adjust the speed of the input shaft.

[0016] The gear shifting process for upshifting is as follows: first, the engine reduces torque and activates the one-way clutch at the same time, then the gear is disengaged and the sliding gear sleeve pushes the friction brake through the braking sliding gear sleeve. When the input shaft speed reaches the set range, the sliding gear sleeve cancels the push on the braking sliding gear sleeve, and finally the gear is engaged, the engine increases torque, and the one-way clutch is locked.

[0017] The forced downshift shifting process includes the following steps in sequence: first, the engine reduces torque and activates the one-way clutch at the same time, and then the gears are disengaged, engaged, the engine increases torque, and the one-way clutch is locked in sequence.

[0018] The AMT transmission needs to downshift during coasting. During the coasting process, the one-way clutch is locked first, and then the gear shifting operation is performed by disengaging and closing the clutch of the clutch assembly.

[0019] The gear shifting process for downshifting during coasting is as follows: first, the engine reduces torque while the clutch of the clutch assembly is disengaged; then the gears are disengaged and engaged in sequence; finally, the clutch of the clutch assembly is closed while the engine increases torque.

[0020] The power system also includes a controller, which determines whether the AMT transmission needs to shift up, downshift forcibly, or coast down according to the received brake and accelerator information, vehicle speed information, and gear information.

[0021] Activating the one-way clutch means: disengaging the sliding gear sleeve from the output shaft connecting gear sleeve, and the power of the input shaft is transmitted to the output shaft through the outer ring and inner ring of the one-way clutch in sequence; locking the one-way clutch means engaging the sliding gear sleeve with the input shaft connecting gear sleeve and the output shaft connecting gear sleeve at the same time, and the power of the input shaft is transmitted to the output shaft through the input shaft connecting gear sleeve and the output shaft connecting gear sleeve in sequence.

[0022] The controller controls the motor to drive the sliding gear sleeve to move.

[0023] The beneficial effects of the present invention are as follows: the clutch can remain closed during gear shifting, thereby improving the sense of frustration caused by power interruption during gear shifting of the traditional AMT gearbox, assisting the engine in slowing down by means of the friction brake, shortening the power interruption time of gear shifting of the AMT gearbox, speeding up the gear shifting process, and improving driving comfort; the present invention is suitable for vehicles with AMT gearboxes, and the system is installed between the original vehicle clutch scoop shell and the AMT gearbox, without changing the original vehicle clutch and AMT gearbox system, greatly reducing production investment and upgrading and transformation costs, and facilitating promotion on existing AMT gearbox rear-wheel drive vehicles; the device is simple and small in size, and is convenient to arrange and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of an embodiment of the present invention applied to a car;

[0025] Figure 2 It is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] An auxiliary shifting device for an AMT gearbox, such as Figure 1 and Figure 2 As shown, the auxiliary shift device 2 is used in a vehicle power system, which includes a controller and an engine 4, a clutch assembly 1, an auxiliary shift device 2 and an AMT gearbox 3 connected in sequence. The power of the engine 4 is transmitted to the wheels through the clutch assembly 1, the auxiliary shift device 2 and the AMT gearbox 3 in sequence.

[0029] The clutch assembly 1 comprises a clutch, and the clutch is a conventional clutch.

[0030] The auxiliary gear shifting device 2 is as follows Figure 2 The transmission includes an input shaft 21 , an output shaft 24 , a one-way clutch 23 , an input shaft connecting gear sleeve 28 , an output shaft connecting gear sleeve 29 , a sliding gear sleeve 27 , a shift fork 26 , a brake sliding gear sleeve 25 , and a friction brake 22 .

[0031] One end of the input shaft 21 is connected to the clutch assembly 1 , and the other end is connected to the output shaft 24 . One end of the output shaft 24 is connected to the input shaft 21 , and the other end is connected to the AMT gearbox 3 .

[0032] The input shaft 21 and the output shaft 24 are connected via a one-way clutch 23 or can be switched so that the input shaft 21 and the output shaft 24 are connected so as to rotate together.

[0033] One end of the input shaft connecting gear sleeve 28 is fixedly connected to the input shaft 21, and the other end is connected to the outer ring of the one-way clutch 23. Preferably, the input shaft connecting gear sleeve 28 is fixedly connected to the outer ring of the one-way clutch 23. One end of the output shaft connecting gear sleeve 29 is connected to the inner ring of the one-way clutch 23, and the other end is fixedly connected to the output shaft 24. In this way, when the input shaft 21 rotates, the input shaft connecting gear sleeve 28, the outer ring of the one-way clutch 23, the inner ring of the one-way clutch 23 and the output shaft 24 are driven to rotate in sequence.

[0034] The input shaft connecting gear sleeve 28 is cylindrical, and the output shaft connecting gear sleeve 29 is also cylindrical. When connected, the input shaft connecting gear sleeve 28 and the output shaft connecting gear sleeve 29 share the same center line, the input shaft connecting gear sleeve 28 is sleeved on the outside of the input shaft 21, and one end of the input shaft connecting gear sleeve 28 is fixedly connected to the input shaft 21; the output shaft connecting gear sleeve 29 is sleeved on the outside of the output shaft 24, and the inner side of the output shaft connecting gear sleeve 29 is fixedly connected to the output shaft 24. The outer ring of the one-way clutch 23 is connected to the inner side of the input shaft connecting gear sleeve 28, and the inner ring of the one-way clutch 23 is connected to an outer side of the output shaft connecting gear sleeve 29 with a smaller outer diameter. The outer side of the output shaft connecting gear sleeve 29 with the largest outer diameter is flush with the outer side of the input shaft connecting gear sleeve 28 with the largest outer diameter, or in other words, the outer side of the output shaft connecting gear sleeve 29 with the largest outer diameter and the outer side of the input shaft connecting gear sleeve 28 with the largest outer diameter are located on the same cylindrical side.

[0035] The sliding gear sleeve 27 is cylindrical, and the inner side of the sliding gear sleeve 27 meshes with the outer side with the largest outer diameter of the input shaft connecting gear sleeve 28, or meshes with the outer side with the largest outer diameter of the input shaft connecting gear sleeve 28 and the outer side with the largest outer diameter of the output shaft connecting gear sleeve 29 at the same time. That is, the sliding gear sleeve 27 and the input shaft connecting gear sleeve 28 rotate together, or the sliding gear sleeve 27 rotates together with the input shaft connecting gear sleeve 28 and the output shaft connecting gear sleeve 29 at the same time.

[0036] The sliding gear sleeve 27 can move along the center line direction of the input shaft connecting gear sleeve 28 or the output shaft connecting gear sleeve 29 until the sliding gear sleeve 27 is engaged with the input shaft connecting gear sleeve 28 alone or moves to engage with the input shaft connecting gear sleeve 28 and the output shaft connecting gear sleeve 29 at the same time.

[0037] The friction brake 22 is used to reduce the speed of the input shaft 21. The friction brake 22 includes a plurality of friction plates and a plurality of steel plates, which are arranged alternately. The friction plates are fixedly connected to the input shaft 21, and the steel plates are relatively fixed to the housing of the auxiliary shifting device 2. The friction brake 22 is located on the side of the input shaft connecting gear sleeve 28 away from the output shaft connecting gear sleeve 29, and the brake sliding gear sleeve 25 is located between the friction brake 22 and the input shaft connecting gear sleeve 28. One end of the brake sliding gear sleeve 25 is connected to the friction brake 22 and can apply force to it, so that the plurality of friction plates and the plurality of steel plates are in contact and pressed, thereby reducing the speed of the input shaft 21.

[0038] The sliding gear sleeve 27 can push the braking sliding gear sleeve 25 so that the braking sliding gear sleeve 25 presses the friction brake 22. Specifically, the input shaft connecting gear sleeve 28 is located between the braking sliding gear sleeve 25 and the output shaft connecting gear sleeve 29. When the sliding gear sleeve 27 moves toward one end close to the braking sliding gear sleeve 25, the sliding gear sleeve 27 is disengaged from the meshing with the output shaft connecting gear sleeve 29, contacts the braking sliding gear sleeve 25 and applies a force to it; when the sliding gear sleeve 27 moves toward one end close to the output shaft connecting gear sleeve 29, the sliding gear sleeve 27 is disengaged from the contact with the braking sliding gear sleeve 25 and simultaneously engages the input shaft connecting gear sleeve 28 and the output shaft connecting gear sleeve 29; when the sliding gear sleeve 27 neither applies a force to the braking sliding gear sleeve 25 nor engages the output shaft connecting gear sleeve 29, the sliding gear sleeve 27 only engages the input shaft connecting gear sleeve 28. When the sliding gear sleeve 27 does not apply a force to the braking sliding gear sleeve 25, the braking sliding gear sleeve 25 returns to its original position under the action of the return spring.

[0039] The shift fork 26 is sleeved on the outer side of the sliding gear sleeve 27 , and the shift fork 26 drives the sliding gear sleeve 27 to move along the center line direction of the input shaft connecting gear sleeve 28 or the output shaft connecting gear sleeve 29 .

[0040] The characteristic of the one-way clutch 23 is that when the outer ring speed of the one-way clutch 23 is greater than the inner ring speed, the outer ring of the one-way clutch 23 can drive the inner ring of the one-way clutch 23 to rotate; when the outer ring speed of the one-way clutch 23 is less than the inner ring speed or the inner ring of the one-way clutch 23 rotates in the opposite direction to the outer ring, the drive cannot be transmitted between the outer ring and the inner ring of the one-way clutch 23.

[0041] Based on the above structure and the characteristics of the one-way clutch 23, when the AMT gearbox 3 needs to perform a gear shift operation, the position of the sliding sleeve 27 is adjusted by the shift fork 26 to disengage the sliding sleeve 27 from the output shaft connecting sleeve 29, that is, the sliding sleeve 27 is only engaged with the input shaft connecting sleeve 28 or the sliding sleeve 27 is engaged with the input shaft connecting sleeve 28 and the sliding sleeve 27 contacts the brake sliding sleeve 25 and applies force to it. The input shaft 21 is driven to the AMT gearbox 3 through the input shaft connecting sleeve 28, the outer ring of the one-way clutch 23, the inner ring of the one-way clutch 23, the output shaft connecting sleeve 29, and the output shaft 24 in sequence, or the one-way clutch 32 is activated. At this time, the clutch of the clutch assembly 1 can be kept in a closed state when shifting, that is, there is no need to disconnect the traditional clutch.

[0042] The position of the sliding gear sleeve 27 is adjusted so that the sliding gear sleeve 27 pushes the braking sliding gear sleeve 25. When the braking sliding gear sleeve 25 pushes the friction brake 22, the friction brake 22 assists in decelerating the input shaft 21, thereby reducing the speed adjustment time of the input shaft 21 during the gear shifting process and speeding up the gear shifting process.

[0043] When the function of the one-way clutch 23 is not needed, or when the one-way clutch 23 needs to be locked, the position of the sliding gear sleeve 27 is adjusted so that the sliding gear sleeve 27 moves to simultaneously engage the input shaft connecting gear sleeve 28 and the output shaft connecting gear sleeve 29. At this time, the input shaft 21 transmits drive to the AMT gearbox 3 through the input shaft connecting gear sleeve 28, the output shaft connecting gear sleeve 29, and the output shaft 24 in sequence. That is, at this time, the input shaft 21 and the output shaft 24 are equivalent to a transmission shaft.

[0044] The controller receives information and controls the terminal component actions according to the received information. The information received by the controller includes but is not limited to the information of the accelerator and brake, the gear position, the torque and speed information of the vehicle, and the information sent by the position sensor that monitors the position of the sliding gear sleeve 27. The actions of the terminal component include but are not limited to the movement of the sliding gear sleeve 27, the closing and separation of the clutch of the clutch assembly 1, the torque reduction and increase of the engine 4, the gear shifting and the gear engagement.

[0045] The controller determines whether the AMT transmission 3 needs to shift up, downshift by force, or coast down according to the received brake and accelerator information, vehicle speed information, and gear position information;

[0046] The shifting method of the AMT transmission 3 equipped with the shifting device is as follows: when the AMT transmission 3 needs to shift up or down, the one-way clutch 23 is first activated, the input shaft 21 is connected to the output shaft 24 through the one-way clutch 23, and then the shifting operation is performed. During the shifting operation, the clutch of the clutch assembly 1 remains in a closed state, and the upshifting shifting process is assisted by the friction brake 22 to adjust the speed of the input shaft 21.

[0047] The shifting process of upshifting is as follows: first, the engine reduces torque and activates the one-way clutch 23 at the same time, then the gear is disengaged and the sliding gear sleeve 27 pushes the friction brake 22 through the braking sliding gear sleeve 25, so that the input shaft 21 is accelerated and reduced. When the speed of the input shaft 21 reaches the set range, the sliding gear sleeve 27 cancels the push on the braking sliding gear sleeve 25, and finally the gear is engaged, the engine increases torque, and the one-way clutch 23 is locked. The one-way clutch 23 is locked when the engine increases torque to the torque required by the driver. Finally, the one-way clutch 23 is locked to ensure that the reverse towing condition of the vehicle is effective during normal driving, and the locked one-way clutch 23 is activated again before the next upshift. In other words, when the vehicle is driving normally, the one-way clutch 23 is in a locked state.

[0048] The forced downshifting process includes the following steps: first, the engine reduces torque and activates the one-way clutch 23 at the same time, and then the gear is disengaged, the gear is engaged, the engine increases torque, and the one-way clutch 23 is locked.

[0049] The AMT transmission 3 needs to downshift during the coasting process. During the coasting process, the one-way clutch 23 is first locked, and then the gear shifting operation is performed by disengaging and closing the clutch of the clutch assembly 1.

[0050] The gear shifting process for downshifting during coasting is as follows: first, the engine reduces torque while the clutch of clutch assembly 1 is disengaged; then the gears are disengaged and engaged in sequence; finally, the clutch of clutch assembly 1 is closed while the engine increases torque.

[0051] Coasting downshift means that the engine is not refueled, and the car coasts without refueling. At this time, the wheels drag the engine 4 to rotate, that is, initially, the speed of the inner ring of the one-way clutch 23 is greater than the speed of the outer ring, and the inner ring cannot drive the outer ring to rotate. At this time, the one-way clutch 23 needs to be locked.

[0052] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the present invention in detail and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the present invention all fall within the scope of protection of the present invention.

Claims

1. An auxiliary shifting device for an AMT transmission, characterized in that: The auxiliary shifting device (2) is used for a vehicle power system. The power system comprises a clutch assembly (1), an auxiliary shifting device (2) and an AMT gearbox (3) which are connected in sequence. Power is transmitted to wheels through the clutch assembly (1), the auxiliary shifting device (2) and the AMT gearbox (3) in sequence. The clutch assembly (1) comprises a clutch. The auxiliary shifting device (2) comprises an input shaft (21), an output shaft (24) and a one-way clutch (23). The input shaft (21) and the output shaft (24) are connected through the one-way clutch (23) or switched to be connected in a co-rotating manner with the input shaft (21) and the output shaft (24). During upshifting and forced downshifting, the clutch is closed and the input shaft (21) and the output shaft (24) are connected through the one-way clutch (23). During coasting downshifting, the input shaft (21) and the output shaft (24) are connected in a co-rotating manner.

2. The auxiliary shifting device according to claim 1, characterized in that: The auxiliary shifting device (2) also includes a brake sliding gear sleeve (25) and a friction brake (22) for reducing the speed of an input shaft (21), the input shaft (21) is connected to the clutch assembly (1), the output shaft (24) is connected to the AMT gearbox (3), and the brake sliding gear sleeve (25) can be moved to apply a force to the friction brake (22) or cancel the force applied to the friction brake (22).

3. The auxiliary shifting device according to claim 2, characterized in that: The auxiliary gear shifting device (2) also includes an input shaft connecting gear sleeve (28), an output shaft connecting gear sleeve (29) and a sliding gear sleeve (27); one end of the input shaft connecting gear sleeve (28) is fixedly connected to the input shaft (21) and the other end is connected to the outer ring of the one-way clutch (23); one end of the output shaft connecting gear sleeve (29) is connected to the inner ring of the one-way clutch (23) and the other end is fixedly connected to the output shaft (24); the sliding gear sleeve (27) is engaged with the input shaft connecting gear sleeve (28) alone or moves to engage with the input shaft connecting gear sleeve (28) and the output shaft connecting gear sleeve (29) at the same time.

4. A method for using an auxiliary gear shifting device, wherein the auxiliary gear shifting device is based on the structure of any one of claims 1 to 3, characterized in that: The auxiliary shifting device and the AMT gearbox (3) cooperate in shifting, and the clutch of the clutch assembly (1) remains in a closed state during the shifting process.

5. The method of use according to claim 4, characterized in that: When the AMT transmission (3) needs to shift up or down, the one-way clutch (23) is first activated, the input shaft (21) is connected to the output shaft (24) through the one-way clutch (23), and then the gear shifting operation is performed. During the gear shifting operation, the gear shifting process of the upshift is assisted by the friction brake (22) to adjust the speed of the input shaft (21).

6. The method of use according to claim 5, characterized in that: The upshifting process is as follows: first, the engine reduces torque and activates the one-way clutch (23), then the gear is disengaged and the sliding gear sleeve (27) pushes the friction brake (22) through the braking sliding gear sleeve (25), when the speed of the input shaft (21) reaches a set range, the sliding gear sleeve (27) cancels the push on the braking sliding gear sleeve (25), and finally the gear is engaged, the engine increases torque, and the one-way clutch (23) is locked.

7. The method of use according to claim 5, characterized in that: The forced downshifting shifting process includes the following steps performed in sequence: firstly, the engine reduces torque and activates the one-way clutch (23) at the same time, and then the gear is disengaged, the gear is engaged, the engine increases torque, and the one-way clutch (23) is locked in sequence.

8. The method of use according to claim 5, characterized in that: The AMT transmission (3) needs to downshift during the coasting process. During the coasting process, the one-way clutch (23) is first locked, and then the gear shifting operation is performed by disengaging and closing the clutch of the clutch assembly (1).

9. The method of use according to claim 8, characterized in that: The gear shifting process of downshifting during coasting is as follows: first, the engine reduces torque and the clutch of the clutch assembly (1) is disengaged; then the gears are disengaged and engaged in sequence; finally, the clutch of the clutch assembly (1) is closed and the engine increases torque.

10. The method of use according to any one of claims 5 to 9, characterized in that: Activating the one-way clutch (23) means: disengaging the sliding gear sleeve (27) from the output shaft connecting gear sleeve (29), and the power of the input shaft (21) is transmitted to the output shaft (24) through the outer ring and the inner ring of the one-way clutch (23) in sequence; locking the one-way clutch (23) means simultaneously engaging the sliding gear sleeve (27) with the input shaft connecting gear sleeve (28) and the output shaft connecting gear sleeve (29), and the power of the input shaft (21) is transmitted to the output shaft (24) through the input shaft connecting gear sleeve (28) and the output shaft connecting gear sleeve (29) in sequence.

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