Auxiliary gear shifting device for AMT gearbox

Abstract

The utility model provides an auxiliary gear shifting device for an AMT gearbox, the auxiliary gear shifting device is used for an automobile power system, and the power system comprises an engine, a clutch assembly, an auxiliary gear shifting device and the AMT gearbox which are connected in sequence. 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 utility model, 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 utility model relates to the technical field of automobile power, in particular to an auxiliary shifting device for an AMT gearbox. 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. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide an auxiliary shifting device for an AMT gearbox, in which 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; it is suitable for vehicles with AMT gearbox 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 purpose, the technical solution adopted by the utility model 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 which are 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, a one-way clutch, a braking sliding gear sleeve, and a friction brake for reducing the speed of the input shaft, the input shaft is connected to the clutch assembly, the output shaft is connected to the AMT gearbox, the input shaft and the output shaft are connected through the one-way clutch or switched to be connected so as to rotate together, and the braking sliding gear sleeve can be moved to apply a force to the friction brake or cancel the force applied to the friction brake.

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

[0007] Preferably, 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, and 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.

[0008] Preferably, 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.

[0009] More preferably, 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, and 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.

[0010] More preferably, the outer ring of the one-way clutch is connected to an inner side surface of the input shaft connecting sleeve, the inner ring of the one-way clutch is connected to an outer side surface of the output shaft connecting sleeve, and the inner side of the output shaft connecting sleeve is fixedly connected to the output shaft.

[0011] More preferably, the auxiliary shifting device further comprises a shift fork, which is sleeved on the outer side of the sliding gear sleeve, and 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.

[0012] Preferably, the friction brake comprises a plurality of friction plates and a plurality of steel plates, 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.

[0013] The beneficial effects of the utility model 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 utility model is suitable for vehicles with AMT gearboxes, 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, 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

[0014] Figure 1 This is a schematic diagram of an embodiment of the utility model applied to a car;

[0015] Figure 2 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] 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.

[0017] 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.

[0018] 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 an engine 4, a clutch assembly 1, an auxiliary shift device 2 and an AMT gearbox 3 connected in sequence, and 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.

[0019] The clutch assembly 1 comprises a clutch, and the clutch is a conventional clutch.

[0020] The auxiliary shift 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 .

[0021] 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 .

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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 .

[0030] 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.

[0031] 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 gear sleeve 27 is adjusted by the shift fork 26, so that the sliding gear sleeve 27 is only engaged with the input shaft connecting gear sleeve 28, and the input shaft 21 is sequentially driven to the AMT gearbox 3 through 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, the output shaft connecting gear sleeve 29, and the output shaft 24, 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.

[0032] 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.

[0033] When the function of the one-way clutch 23 is not needed, 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.

[0034] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the utility model in detail and cannot be understood as limiting the protection scope of the utility model. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the utility model belong to the protection scope of the utility model.

Claims

1. An auxiliary shifting device for an AMT transmission, characterized in that: The auxiliary shifting device (2) is used in an automobile power system, wherein the power system comprises an engine (4), a clutch assembly (1), an auxiliary shifting device (2) and an AMT gearbox (3) which are connected in sequence, wherein the power of the engine (4) is transmitted to wheels through the clutch assembly (1), the auxiliary shifting device (2) and the AMT gearbox (3) in sequence, wherein the clutch assembly (1) comprises a clutch, and the auxiliary shifting device (2) comprises an input shaft (21), an output shaft (24), a one-way clutch (23), a brake sliding A gear sleeve (25) and a friction brake (22) for reducing the speed of an input shaft (21); the input shaft (21) is connected to a clutch assembly (1); the output shaft (24) is connected to an AMT gearbox (3); the input shaft (21) and the output shaft (24) are connected via a one-way clutch (23) or switched to be connected to rotate together with the input shaft (21) and the output shaft (24); 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).

2. The auxiliary shifting device according to claim 1, 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.

3. The auxiliary shifting device according to claim 2, characterized in that: 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 output shaft connecting gear sleeve (29), contacts the braking sliding gear sleeve (25) and applies a force thereto; 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 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).

4. The auxiliary shifting device according to claim 3, characterized in that: The input shaft connecting gear sleeve (28) is cylindrical, the output shaft connecting gear sleeve (29) is cylindrical, the outer side surface with the largest outer diameter of the output shaft connecting gear sleeve (29) and the outer side surface with the largest outer diameter of the input shaft connecting gear sleeve (28) are located on the same cylindrical side surface, the sliding gear sleeve (27) is cylindrical, the inner side surface of the sliding gear sleeve (27) meshes with the outer side surface with the largest outer diameter of the input shaft connecting gear sleeve (28), or meshes with the outer side surface with the largest outer diameter of the input shaft connecting gear sleeve (28) and the outer side surface with the largest outer diameter of the output shaft connecting gear sleeve (29) at the same time.

5. The auxiliary shifting device according to claim 4, characterized in that: The outer ring of the one-way clutch (23) is connected to an inner side surface of the input shaft connecting gear sleeve (28), the inner ring of the one-way clutch (23) is connected to an outer side surface of the output shaft connecting gear sleeve (29), and the inner side of the output shaft connecting gear sleeve (29) is fixedly connected to the output shaft (24).

6. The auxiliary shifting device according to claim 4, characterized in that: The auxiliary shifting device (2) also includes a shift fork (26), which is sleeved on the outer side of the sliding gear sleeve (27). 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).

7. The auxiliary shifting device according to claim 1, characterized in that: The friction brake (22) comprises a plurality of friction plates and a plurality of steel plates, wherein 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).

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