Gear-shifting power-assisted air supply stroke device and using method

Abstract

The invention belongs to the technical field of automobile gear shifting, and particularly relates to a gear shifting assisting air supply stroke device and a using method. A gear-shifting power-assisted air supply stroke device comprises a gas-liquid conversion actuator shell, a hydraulic driving mechanism and a pneumatic actuating mechanism are arranged in the gas-liquid conversion actuator shell, the hydraulic driving mechanism is connected with the pneumatic actuating mechanism, and a gear-shifting power-assisted mechanism is arranged on the pneumatic actuating mechanism; the positions of the first through hole and the second through hole in the guide sleeve can be adjusted by rotating the adjusting nut and the limiting plug, so that the effect that the first through hole and the second through hole in the guide sleeve provide different air supply strokes is achieved so as to adapt to the requirements of different separation strokes of the clutch, the air inlet and outlet adjusting unit can reduce the number of guide sleeves, and the cost is reduced. Part management is facilitated; the invention further provides a using method of the gear-shifting power-assisted air supply stroke device, and an operator can understand and use the device conveniently.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive shifting. Specifically, the present invention relates to a shifting assistance air supply stroke device and a usage method thereof. Background Art

[0002] For the shifting of a transmission, it is required that the clutch be completely disengaged before changing gears. If gears are shifted while the clutch is in a semi - engaged state, it will damage the transmission gears and synchronizers. Therefore, a certain delay amount is required for the shifting assistance air supply time. Usually, this delay amount needs to be accurately adjusted according to various factors such as the actual working conditions of the vehicle, the type of transmission, and the characteristics of the clutch. For example, in a manual - transmission vehicle, when frequently shifting gears in urban congested traffic conditions, the accuracy requirement for the delay amount is extremely high. If the delay is too short, the air supply for shifting assistance is provided before the clutch is completely disengaged, which will cause the synchronizer to bear too much impact. In the long run, the wear of the synchronizer will be aggravated, resulting in jamming and gear - knocking phenomena during shifting, seriously affecting the driving experience and the service life of the transmission. On the other hand, if the delay is too long, although it can ensure that the clutch is fully disengaged, it will prolong the shifting time, increase the interruption time of power transmission, cause the vehicle to accelerate unevenly. In scenarios where quick shifting is required, such as overtaking, it will also affect the timeliness of the vehicle's power response and reduce driving safety.

[0003] The clutch separation stroke varies. For a larger separation stroke, the air supply should be delayed, and for a smaller separation stroke, the air supply should be earlier. This requires that the shifting assistance air supply stroke should not be a fixed value, but needs to be adjusted according to the size of the clutch separation stroke. However, the existing shifting assistance air supply stroke is a fixed value and cannot meet the requirement of adjusting the shifting assistance air supply stroke according to the size of the clutch separation stroke. Summary of the Invention

[0004] The present invention is made to solve the above - mentioned problems, and the purpose is to provide a shifting assistance air supply stroke device that can provide shifting assistance air supply according to the size of the clutch separation stroke. To achieve the above purpose, the technical solution adopted by the present invention is as follows: A shifting assistance air supply stroke device includes a gas - liquid conversion actuator housing. A hydraulic drive mechanism and a pneumatic actuator mechanism are arranged inside the gas - liquid conversion actuator housing. The hydraulic drive mechanism is connected to the pneumatic actuator mechanism, and a shifting assistance mechanism is arranged on the pneumatic actuator mechanism.

[0005] The shift assist mechanism includes a two-position three-way valve, which is arranged on the housing of the air-liquid conversion actuator. A fourth chamber is formed inside the two-position three-way valve. A scale rod is arranged inside the fourth chamber. One end of the scale rod passes through the housing of the air-liquid conversion actuator and is connected to the pneumatic actuator. A second piston is arranged inside the fourth chamber. The second piston is connected to the scale rod. A guide sleeve is arranged inside the fourth chamber. A guide ring is sleeved on the second piston. A ventilation unit is arranged on the two-position three-way valve. An air inlet and outlet adjustment unit is arranged on the guide sleeve.

[0006] The air inlet and outlet adjustment unit includes a back-tightening thin nut and an adjusting nut. Threads are formed on the guide sleeve. The back-tightening thin nut and the adjusting nut are threadedly connected to the guide sleeve. The back-tightening thin nut and the adjusting nut are in contact with each other. A limit plug is arranged at one end of the guide sleeve. The limit plug is threadedly connected to the two-position three-way valve.

[0007] The ventilation unit includes a second air inlet and an air outlet, which are formed on the two-position three-way valve. A first through hole for cooperating with the second air inlet is arranged on the guide sleeve. A second through hole for cooperating with the air outlet is arranged on the guide sleeve. The second piston is provided with a first sealing ring, a second sealing ring and a second channel. A reset unit is arranged on the scale rod.

[0008] The reset unit includes a first spring seat and a second spring seat, which are sleeved on the scale rod. A torsion spring is arranged between the first spring seat and the second spring seat. A second gasket is arranged at one end of the second spring seat.

[0009] A leather ring seat is arranged between the fourth chamber and the housing of the air-liquid conversion actuator. A leather cup, a scale rod, a guide plate and a first gasket are coaxially arranged at one end of the leather ring seat. A third sealing ring is arranged between the leather ring seat and the housing of the air-liquid conversion actuator.

[0010] The hydraulic drive mechanism includes a clutch master cylinder and a first chamber, which is arranged inside the housing of the air-liquid conversion actuator. The clutch master cylinder is connected to the first chamber through an oil pipeline. A piston rod is arranged inside the first chamber. One end of the piston rod is connected to a push rod.

[0011] The pneumatic actuator includes a second chamber, which is arranged inside the housing of the air-liquid conversion actuator. The second chamber is communicated with the first chamber. A servo valve piston is arranged inside the second chamber. One end of the servo valve piston is provided with an inclined scale. A screw head is arranged on one side of the inclined scale. A first air inlet is formed on one side of the screw head. The second chamber is connected to an execution unit.

[0012] The execution unit includes a third chamber, which is arranged inside the gas-liquid conversion actuator housing. A first channel is provided between the third chamber and the second chamber. A first piston is arranged inside the third chamber. The first piston is sleeved on the piston rod, and a scale rod is connected to the first piston.

[0013] A method for using a shift assist air supply stroke device includes the following steps:

[0014] Step 101: By rotating the adjusting nut and the limit plug, the positions of the first through hole and the second through hole on the guide sleeve can be adjusted to provide the function of different air supply strokes.

[0015] Step 102: Step on the clutch pedal, and the hydraulic fluid in the clutch master cylinder enters the first chamber, pushing the piston rod and the push rod to move.

[0016] Step 103: The hydraulic fluid pushes the servo valve piston, and the servo valve piston moves downward, and the high-pressure gas enters the first air inlet.

[0017] Step 104: The high-pressure gas enters the third chamber through the first channel to further push the piston rod and the push rod to move rightward.

[0018] Step 105: The piston rod drives the scale rod and the second piston to move for air exchange.

[0019] The technical effect of the present invention is that by rotating the adjusting nut and the limit plug, the positions of the first through hole and the second through hole on the guide sleeve can be adjusted, so as to achieve the effect that the first through hole and the second through hole on the guide sleeve provide different air supply strokes, to adapt to the requirements of different separation strokes of the clutch. The air inlet and outlet adjustment unit can reduce the number of types of guide sleeves, which is convenient for parts management.

[0020] During shifting, the piston rod is driven by the hydraulic fluid to drive the push rod, and at the same time, the high-pressure gas will push the first piston, driving the piston rod, the push rod and the scale rod to move to assist shifting. The scale rod drives the second piston to move. When the second piston moves to a suitable position and the second sealing ring passes over the first through hole but has not passed over the second through hole, the second channel is communicated with the first through hole and the second through hole, and the high-pressure gas can enter from the second air inlet, pass through the first through hole and reach the second channel to achieve shift assistance. When the second sealing ring passes over the second through hole, the high-pressure gas can enter from the first through hole, pass through the second through hole and be discharged through the air outlet to achieve gas discharge. After shifting is completed, release the clutch pedal, and the scale rod drives the second piston to move back, cutting off the ventilation state of the second air inlet and the air outlet. Description of the Drawings

[0021] This specification includes the following drawings, and the shown contents are respectively:

[0022] Figure 1 It is the overall structure diagram of a shift assist air supply stroke device of the present invention;

[0023] Figure 2 is an enlarged view of the position B in a shift assistance air supply stroke device of the present invention Figure 1 in;

[0024] Figure 3 is an enlarged view of the position A in a shift assistance air supply stroke device of the present invention Figure 1 in;

[0025] Figure 4(a) and 4(b) and 4(c) are schematic structural diagrams of an air inlet / outlet adjustment unit of a shift assistance air supply stroke device of the present invention;

[0026] Figure 5(a) and 5(b) are front and side schematic diagrams of a back-tightening thin nut of a shift assistance air supply stroke device of the present invention;

[0027] Figure 6(a) and 6(b) are front and side schematic diagrams of an adjusting nut of a shift assistance air supply stroke device of the present invention;

[0028] Figure 7 is a shift principle diagram of a shift assistance air supply stroke device of the present invention.

[0029] The markings in the figure are: 1. Gas-liquid conversion actuator housing; 2. Hydraulic drive mechanism; 201. First chamber; 202. Piston rod; 203. Push rod; 3. Pneumatic actuator; 301. Second chamber; 302. Follow-up valve piston; 303. Inclined scale; 304. Screw head; 305. First air inlet; 31. Execution unit; 311. Third chamber; 312. First channel; 313. First piston; 4. Shift assistance mechanism; 401. Two-position three-way valve; 402. Fourth chamber; 403. Second piston; 404. Guide sleeve; 405. Guide ring; 406. Scale rod; 41. Air exchange unit; 411. Second air inlet; 412. Air outlet; 413. First through hole; 414. Second through hole; 415. First sealing ring; 416. Second sealing ring; 417. Second channel; 42. Air inlet / outlet adjustment unit; 421. Back-tightening thin nut; 422. Adjusting nut; 423. Limit plug; 43. Reset unit; 431. First spring seat; 432. Second spring seat; 433. Torsion spring; 434. Second gasket; 5. Leather ring seat; 6. Leather cup; 7. Guide plate; 8. First gasket; 9. Third sealing ring. Detailed implementation manners

[0030] The following will further elaborate on the specific implementation manners of the present invention with reference to the accompanying drawings through the description of embodiments, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention and facilitate its implementation.

[0031] As Figures 1 to 7 shown, a shift assist air supply stroke device includes a gas-liquid conversion actuator housing 1. A hydraulic drive mechanism 2 and a pneumatic actuator mechanism 3 are arranged inside the gas-liquid conversion actuator housing 1. The hydraulic drive mechanism 2 is connected to the pneumatic actuator mechanism 3, and a shift assist mechanism 4 is arranged on the pneumatic actuator mechanism 3. The gas-liquid conversion actuator housing 1 is used to accommodate the hydraulic drive mechanism 2 and the pneumatic actuator mechanism 3, providing a sealed environment and structural support. The hydraulic drive mechanism 2 converts the mechanical force of the driver stepping on the clutch pedal into hydraulic pressure and transmits it to the pneumatic actuator mechanism 3 through the oil, serving as the initial power source and control signal of the system. The pneumatic actuator mechanism 3 utilizes high-pressure gas to further provide the mechanical thrust for shifting, significantly reducing the human effort required for shifting. The shift assist mechanism 4 provides the input and discharge of air during shifting to ensure the air circulation during shifting.

[0032] The shift assist mechanism 4 includes a two-position three-way valve 401. The two-position three-way valve 401 is arranged on the gas-liquid conversion actuator housing 1. A fourth chamber 402 is formed inside the two-position three-way valve 401. A scale rod 406 is arranged inside the fourth chamber 402. One end of the scale rod 406 passes through the gas-liquid conversion actuator housing 1 and is connected to the pneumatic actuator mechanism 3. A second piston 403 is arranged inside the fourth chamber 402. The second piston 403 is connected to the scale rod 406. A guide sleeve 404 is arranged inside the fourth chamber 402. A guide ring 405 is sleeved on the second piston 403. The guide ring 405 is used to guide the movement of the second piston 403. A ventilation unit 41 is arranged on the two-position three-way valve 401. An air inlet / outlet adjustment unit 42 is arranged at the other end of the guide sleeve 404. The outer circle of the guide sleeve 404 fits with the fourth chamber 402. The second piston 403 fits with the guide sleeve 404. The second piston 403 is arranged on the scale rod 406 and can move along with the scale rod 406. When the vehicle shifts gears, the scale rod 406 will move, thus driving the second piston 403 to move. As the second piston 403 moves to a suitable position, the second air inlet 411 and the air outlet 412 will be connected to achieve air exchange.

[0033] The air inlet and outlet adjustment unit 42 includes a back-tightening thin nut 421 and an adjusting nut 422. The guide sleeve 404 is provided with threads. The back-tightening thin nut 421 and the adjusting nut 422 are threadedly connected to the guide sleeve 404. The back-tightening thin nut 421 and the adjusting nut 422 are in contact with each other. One end of the guide sleeve 404 is provided with a limit plug 423, and the limit plug 423 is threadedly connected to the two-way three-way valve 401. The back-tightening thin nut 421 can prevent the adjusting nut 422 from loosening. By rotating the adjusting nut 422 and the limit plug 423, the positions of the first through hole 413 and the second through hole 414 on the guide sleeve 404 can be adjusted, so as to achieve the effect of providing different air supply strokes for the first through hole 413 and the second through hole 414 on the guide sleeve 404, so as to adapt to the requirements of different separation strokes of the clutch. The air inlet and outlet adjustment unit 42 can reduce the number of types of the guide sleeve 404 and facilitate the management of parts.

[0034] The air exchange unit 41 includes a second air inlet 411 and an air outlet 412. The second air inlet 411 and the air outlet 412 are opened on the two-way three-way valve 401. The guide sleeve 404 is provided with a first through hole 413 for cooperating with the second air inlet 411, and the guide sleeve 404 is provided with a second through hole 414 for cooperating with the air outlet 412. The second piston 403 is provided with a first sealing ring 415, a second sealing ring 416 and a second channel 417. The first sealing ring 415 and the second sealing ring 416 are arranged at both ends of the second channel 417. A reset unit 43 is arranged on the scale rod 406. Before shifting gears, the second air inlet 411 and the air outlet 412 are not connected. When shifting gears, the scale rod 406 drives the second piston 403 to move. When the second piston 403 moves to a suitable position and the second sealing ring 416 passes over the first through hole 413 but has not passed over the second through hole 414, the second channel 417 is connected to the first through hole 413 and the second through hole 414. High-pressure gas can enter from the second air inlet 411, pass through the first through hole 413 and reach the second channel 417 to realize shifting gear assistance. When the second sealing ring 416 passes over the second through hole 414, the high-pressure gas can enter the second through hole 414 from the first through hole 413 and be discharged through the air outlet 412 to realize gas discharge. After shifting gears, when the clutch pedal is released, the scale rod 406 drives the second piston 403 to move back, and the ventilation state between the second air inlet 411 and the air outlet 412 is cut off.

[0035] The reset unit 43 includes a first spring seat 431 and a second spring seat 432. The first spring seat 431 and the second spring seat 432 are sleeved on the scale rod 406. A torsion spring 433 is arranged between the first spring seat 431 and the second spring seat 432. One end of the second spring seat 432 is provided with a second gasket 434. The first spring seat 431 and the second spring seat 432 are used to fix the torsion spring 433. When the scale rod 406 drives the second piston 403 to move back to the end, the torsion spring 433 will be compressed, which can buffer and shock-absorb the piston, ensuring the stability of the reset force. The second gasket 434 can reduce the buffer reset impact.

[0036] A leather cup seat 5 is arranged between the fourth chamber 402 and the gas-liquid conversion actuator housing 1. One end of the leather cup seat 5 is coaxially provided with a leather cup 6, a scale rod 406, a guide plate 7 and a first gasket 8. The leather cup 6 abuts against the leather cup seat 5. One end of the leather cup 6 is sequentially provided with the guide plate 7 and the first gasket 8. A third sealing ring 9 is arranged between the leather cup seat 5 and the gas-liquid conversion actuator housing 1. The leather cup seat 5 and the leather cup 6 double-seal the gap between the scale rod 406 and the housing to prevent oil and gas leakage. The guide plate 7 assists the axial movement of the scale rod 406. The first gasket 8 is arranged at one end of the guide plate 7 to prevent the guide plate 7 from being damaged.

[0037] The hydraulic driving mechanism 2 includes a clutch master cylinder and a first chamber 201. The first chamber 201 is arranged in the gas-liquid conversion actuator housing 1. The clutch master cylinder is connected to the first chamber 201 through an oil pipeline. A piston rod 202 is arranged in the first chamber 201. One end of the piston rod 202 is connected with a push rod 203. When the clutch pedal is depressed, the oil in the clutch master cylinder enters the first chamber 201 through the oil pipeline. After the oil enters the first chamber 201, it will push the piston rod 202, and the piston rod 202 drives the push rod 203, and the push rod 203 exerts a thrust on the clutch release fork.

[0038] The pneumatic actuator 3 includes a second chamber 301. The second chamber 301 is arranged in the gas-liquid conversion actuator housing 1. The second chamber 301 is communicated with the first chamber 201. A servo valve piston 302 is arranged in the second chamber 301. One end of the servo valve piston 302 is provided with an inclined ruler 303. One side of the inclined ruler 303 is provided with a screw head 304. A first air inlet 305 is opened on one side of the screw head 304. The second chamber 301 is connected with an execution unit 31. After the oil enters the first chamber 201, it will push the servo valve piston 302 in the second chamber 301 to move. The inclined surface of the inclined ruler 303 slides along the screw head 304, gradually changing the position of the screw head 304, forcing the screw head 304 to translate to one side, and the first air inlet 305 is opened; high-pressure gas enters the third chamber 311.

[0039] The execution unit 31 includes a third chamber 311. The third chamber 311 is arranged inside the gas-liquid conversion actuator housing 1. A first channel 312 is provided between the third chamber 311 and the second chamber 301. A first piston 313 is arranged inside the third chamber 311. The first piston 313 is sleeved on the piston rod 202, and a scale rod 406 is connected to the first piston 313. High-pressure gas will enter the third chamber 311 through the first channel 312. After the high-pressure gas enters the third chamber 311, it pushes the first piston 313, driving the piston rod 202, the push rod 203 and the scale rod 406 to move, assisting in gear shifting.

[0040] A usage method of a shift assist air supply stroke device includes the following steps:

[0041] Step 101: By rotating the adjusting nut 422 and the limit plug 423, the positions of the first through hole 413 and the second through hole 414 on the guide sleeve 404 can be adjusted, so as to achieve the effect of providing different air supply strokes by the first through hole 413 and the second through hole 414 on the guide sleeve 404, to adapt to the requirements of different separation strokes of the clutch. The air inlet and outlet adjustment unit 42 can reduce the variety of guide sleeves 404, facilitating the management of parts.

[0042] Step 102: Step on the clutch pedal, and the hydraulic fluid in the clutch master cylinder enters the first chamber 201, pushing the piston rod 202 and the push rod 203 to move; after the hydraulic fluid enters the first chamber 201, it will push the piston rod 202, and the piston rod 202 drives the push rod 203, and the push rod 203 applies the thrust on the clutch release fork.

[0043] Step 103: The hydraulic fluid pushes the servo valve piston 302, and the servo valve piston 302 moves downward, and the high-pressure gas enters the first air inlet 305; after the hydraulic fluid enters the first chamber 201, it will push the servo valve piston 302 in the second chamber 301 to move, and the inclined surface of the bevel scale 303 slides along the screw head 304, gradually changing the position of the screw head 304, forcing the screw head 304 to translate to one side, and the first air inlet 305 is opened; the high-pressure gas enters the third chamber 311.

[0044] Step 104: The high-pressure gas enters the third chamber 311 from the first channel 312 to further push the piston rod 202 and the push rod 203 to move to the right; the high-pressure gas will enter the third chamber 311 through the first channel 312. After the high-pressure gas enters the third chamber 311, it pushes the first piston 313, driving the piston rod 202, the push rod 203 and the scale rod 406 to move, assisting in gear shifting.

[0045] Step 105: The piston rod 202 drives the scale rod 406 and the second piston 403 to move for air exchange. The scale rod 406 drives the second piston 403 to move. When the second piston 403 moves to a suitable position and the second sealing ring 416 crosses the first through hole 413 but has not crossed the second through hole 414, the second channel 417 is communicated with the first through hole 413 and the second through hole 414. High-pressure gas can enter from the second air inlet 411, pass through the first through hole 413 and reach the second channel 417 to achieve shift assistance. When the second sealing ring 416 crosses the second through hole 414, the high-pressure gas can enter the second through hole 414 from the first through hole 413 and be discharged through the air outlet 412 to achieve gas discharge. After shifting, release the clutch pedal, and the scale rod 406 drives the second piston 403 to move back, cutting off the ventilation state between the second air inlet 411 and the air outlet 412.

[0046] Functions and effects of the embodiment

[0047] By rotating the adjusting nut 422 and the limit plug 423, the positions of the first through hole 413 and the second through hole 414 on the guide sleeve 404 can be adjusted, so as to achieve the effect of providing different air supply strokes for the first through hole 413 and the second through hole 414 on the guide sleeve 404 to adapt to the requirements of different separation strokes of the clutch. The air inlet and outlet adjustment unit 42 can reduce the variety of the guide sleeve 404 and facilitate the management of parts.

[0048] When shifting gears, the piston rod 202 is driven by the oil to drive the push rod 203, and at the same time, the high-pressure gas will push the first piston 313 to drive the piston rod 202, the push rod 203 and the scale rod 406 to move to assist in shifting gears. The scale rod 406 drives the second piston 403 to move. When the second piston 403 moves to a suitable position and the second sealing ring 416 crosses the first through hole 413 but has not crossed the second through hole 414, the second channel 417 is communicated with the first through hole 413 and the second through hole 414. High-pressure gas can enter from the second air inlet 411, pass through the first through hole 413 and reach the second channel 417 to achieve shift assistance. When the second sealing ring 416 crosses the second through hole 414, the high-pressure gas can enter the second through hole 414 from the first through hole 413 and be discharged through the air outlet 412 to achieve gas discharge. After shifting, release the clutch pedal, and the scale rod 406 drives the second piston 403 to move back, cutting off the ventilation state between the second air inlet 411 and the air outlet 412.

[0049] The present invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, all are within the protection scope of the present invention.

Claims

1. A gear shift assist air supply stroke device, comprising a gas-liquid conversion actuator housing (1), characterized in that: A hydraulic drive mechanism (2) and a pneumatic actuator (3) are arranged in the gas-liquid conversion actuator housing (1); the hydraulic drive mechanism (2) is connected to the pneumatic actuator (3); and a gear shift assist mechanism (4) is arranged on the pneumatic actuator (3).

2. The gear shift assist air supply stroke device according to claim 1, characterized in that: The gear shift assist mechanism (4) comprises a two-position three-way valve (401), the two-position three-way valve (401) being arranged on a gas-liquid conversion actuator housing (1), the two-position three-way valve (401) being provided with a fourth chamber (402), the fourth chamber (402) being provided with a scale rod (406), one end of the scale rod (406) passing through the gas-liquid conversion actuator housing (1) and being connected to a pneumatic actuator (3), the fourth chamber (402) being provided with a second piston (403), the second piston (403) being connected to the scale rod (406), the fourth chamber (402) being provided with a guide sleeve (404), the second piston (403) being sleeved with a guide ring (405), the two-position three-way valve (401) being provided with a ventilation unit (41), and the guide sleeve (404) being provided with an inlet and outlet air adjustment unit (42).

3. The gear shift assist air supply stroke device according to claim 2, characterized in that: The air inlet and outlet adjustment unit (42) comprises a back-tightening thin nut (421) and an adjusting nut (422); the guide sleeve (404) is provided with threads; the back-tightening thin nut (421) and the adjusting nut (422) are threadedly connected to the guide sleeve (404); the back-tightening thin nut (421) and the adjusting nut (422) are abutted against each other; a limiting plug (423) is provided at one end of the guide sleeve (404); the limiting plug (423) is threadedly connected to the two-position three-way valve (401).

4. The gear shift assist air supply stroke device according to claim 2, characterized in that: The ventilation unit (41) comprises a second air inlet (411) and an air outlet (412), wherein the second air inlet (411) and the air outlet (412) are provided on the two-position three-way valve (401), the guide sleeve (404) is provided with a first through hole (413) for use with the second air inlet (411), the guide sleeve (404) is provided with a second through hole (414) for use with the air outlet (412), the second piston (403) is provided with a first sealing ring (415), a second sealing ring (416) and a second channel (417), and the scale rod (406) is provided with a reset unit (43).

5. The gear shift assist air supply stroke device according to claim 3, characterized in that: The reset unit (43) comprises a first spring seat (431) and a second spring seat (432); the first spring seat (431) and the second spring seat (432) are sleeved on the scale rod (406); a torsion spring (433) is arranged between the first spring seat (431) and the second spring seat (432); and a second gasket (434) is arranged at one end of the second spring seat (432).

6. The gear shift assist air supply stroke device according to claim 2, characterized in that: A leather ring seat (5) is arranged between the fourth chamber (402) and the gas-liquid conversion actuator housing (1); a leather cup (6), a scale rod (406), a guide plate (7) and a first gasket (8) are coaxially arranged at one end of the leather ring seat (5); and a third sealing ring (9) is arranged between the leather ring seat (5) and the gas-liquid conversion actuator housing (1).

7. The gear shift assist air supply stroke device according to claim 1, characterized in that: The hydraulic drive mechanism (2) comprises a clutch master pump and a first chamber (201); the first chamber (201) is arranged in a gas-liquid conversion actuator housing (1); the clutch master pump is connected to the first chamber (201) via an oil pipeline; a piston rod (202) is arranged in the first chamber (201); one end of the piston rod (202) is connected to a push rod (203).

8. The gear shift assist air supply stroke device according to claim 7, characterized in that: The pneumatic actuator (3) comprises a second chamber (301), the second chamber (301) being arranged in a gas-liquid conversion actuator housing (1), the second chamber (301) being communicated with the first chamber (201), a follower valve piston (302) being arranged in the second chamber (301), a bevel (303) being arranged at one end of the follower valve piston (302), a screw head (304) being arranged at one side of the bevel (303), a first air inlet (305) being opened at one side of the screw head (304), and the second chamber (301) being connected to an actuator unit (31).

9. The gear shift assist air supply stroke device according to claim 8, characterized in that: The actuator unit (31) comprises a third chamber (311), the third chamber (311) is arranged in a gas-liquid conversion actuator housing (1), a first channel (312) is arranged between the third chamber (311) and the second chamber (301), a first piston (313) is arranged in the third chamber (311), the first piston (313) is sleeved on a piston rod (202), and the first piston (313) is connected to a scale rod (406).

10. A method for using the gear shift assist air supply stroke device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 101: The positions of the first through hole (413) and the second through hole (414) on the guide sleeve (404) can be adjusted by rotating the adjustment nut (422) and the limit plug (423) to provide different air supply strokes; Step 102: Depress the clutch pedal, and the oil in the clutch master cylinder enters the first chamber (201), pushing the piston rod (202) and the push rod (203) to move; Step 103: The oil pushes the follower valve piston (302), the follower valve piston (302) moves downward, and the high-pressure gas enters the first air inlet (305); Step 104: The high-pressure gas enters the third chamber (311) from the first channel (312) to further push the piston rod (202) and the push rod (203) to move rightward; Step 105: The piston rod (202) drives the scale rod (406) and the second piston (403) to move for ventilation.

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