Novel clutch booster

Abstract

The invention relates to the technical field of boosters, and provides a novel clutch booster which comprises a pneumatic cylinder and a hydraulic cylinder connected with the rear end of the pneumatic cylinder, and an air inlet and exhaust control valve is arranged on the side, close to the pneumatic cylinder, of the hydraulic cylinder. The air inlet and exhaust control valve comprises a valve body connected with the pneumatic cylinder and the hydraulic cylinder, a first valve element, a second valve element, a first small spring, a second large spring and a first air outlet pipe, a first sliding hole communicated with the interior of the hydraulic cylinder is formed in the valve body, and a locking mechanism is arranged in the valve body. When hydraulic oil returns, the locking mechanism can ensure that the compressed air port, the air inlet cavity and the air inlet are in a communicating state, when the hydraulic oil enters again, the locking mechanism can seal the air inlet cavity and the air inlet, the first valve element is arranged above the second valve element, and the locking mechanism is arranged between the first sliding block and the first valve element; and the first sliding block is linked with the locking mechanism. According to the scheme, the design is ingenious, the structure is compact, the occupied space of the novel booster is reduced to the maximum extent, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of boosters, and specifically, to a novel clutch booster. Background Art

[0002] A clutch booster is an auxiliary device used in automobiles and other mechanical equipment, aiming to reduce the force that a driver needs to apply when operating the clutch. It usually works through a hydraulic or pneumatic system and can convert the driver's pedal movement into a greater and smoother clutch pressure.

[0003] Currently, Chinese Patent No. CN202210060751.7 discloses an improved automotive clutch booster, which mainly includes a driving mechanism, an input mechanism, and an output mechanism that are fixedly connected in sequence. The input mechanism includes an electronic regulating valve. An assembly hole is opened at the bottom end outside the electronic regulating valve. A gas injection threaded cylinder is fixedly connected to the top end on one side of the electronic regulating valve. The electronic regulating valve is rotationally connected to a micro air pump through the gas injection threaded cylinder; the driving mechanism includes an electric cylinder and a liquid storage tank. The bottom end of the electric cylinder is fixedly connected to a barrier seat. A three-way pipe and a communicating pipe are respectively fixedly connected inside the barrier seat. The barrier seat is internally communicated with the electronic regulating valve through the communicating pipe, and the barrier seat is communicated with the liquid storage tank through the three-way pipe; The above technology injects external gas into the interior of the electronic regulating valve through the micro air pump. After being detected and depressurized by the detection controller, it is conveyed from the connection hole on the electronic regulating valve to other components of the device. The pneumatic drive of hydraulic oil is used to achieve continuous contact between the shifting pin and the transmission planetary gear set, thereby improving the phenomenon that the driver needs to continuously step on the clutch pedal during actual operation and reducing driving fatigue.

[0004] Although it solves the problem that the driver needs to keep stepping on the clutch pedal during actual operation, adding an electronic regulating valve and an electric cylinder on the basis of the original booster will increase the volume of the booster. Since the space around the engine compartment and transmission system of a vehicle is usually very limited, the increased volume will occupy more installation space. Secondly, the addition of the electronic regulating valve and the electric cylinder increases the overall production cost of the booster. Summary of the Invention

[0005] The present invention provides a novel clutch booster, which is ingeniously designed and has a compact structure, minimizing the space occupied by the novel booster and reducing the production cost.

[0006] The technical solution of the present invention is as follows: A new type of clutch booster, including a pneumatic cylinder and a hydraulic cylinder connected to the rear end of the pneumatic cylinder. An oil inlet is provided on the side of the hydraulic cylinder away from the pneumatic cylinder, an air inlet is provided on the side of the pneumatic cylinder close to the hydraulic cylinder, an exhaust port is provided on the side of the pneumatic cylinder away from the hydraulic cylinder, an output mechanism is provided inside the pneumatic cylinder, and an air intake and exhaust control valve is provided on the side of the hydraulic cylinder close to the pneumatic cylinder. The air intake and exhaust control valve includes a valve body connected to the pneumatic cylinder and the hydraulic cylinder, a first valve core, a second valve core, a first small spring, a second large spring, and a first air outlet pipe. The valve body is provided with a first sliding hole communicating with the inside of the hydraulic cylinder, and a first slider is slidably connected inside the first sliding hole. The valve body is sequentially provided with a compressed air port and an air intake cavity communicating with the air inlet. A locking mechanism is provided inside the valve body, and when the hydraulic oil retreats, the locking mechanism can ensure that the compressed air port, the air intake cavity, and the air inlet are in a communicating state. When the hydraulic oil enters again, the locking mechanism will close the air intake cavity and the air inlet. One end of the first small spring abuts against the inner bottom of the valve body, the other end of the first small spring abuts against the first valve core, one end of the second large spring abuts against the inner bottom of the valve body, the other end of the second large spring abuts against the second valve core, and the first small spring is arranged inside the second large spring. The first valve core is arranged above the second valve core. The locking mechanism is arranged between the first slider and the first valve core, and the first slider is linked with the locking mechanism.

[0007] Furthermore, the output mechanism includes a first piston slidably connected inside the pneumatic cylinder, a third spring arranged between the first piston and the inner wall of the pneumatic cylinder, a piston rod fixedly connected to the first piston and extending into the hydraulic cylinder at one end, and a push rod hinged to the clutch rocker arm. An air outlet cavity is provided at the bottom of the valve body, a sealing cavity is provided above the air outlet cavity, the second valve core is slidably connected to the inner wall of the sealing cavity, one end of the first air outlet pipe is communicated with the exhaust port, the other end of the first air outlet pipe is communicated with the inside of the air outlet cavity, an air outlet is provided inside the air outlet cavity, and several air outlet holes are provided on the side of the second valve core close to the bottom.

[0008] Further, the locking mechanism includes a receiving cylinder, a moving cylinder, four clamping blocks, and a rotating cylinder connecting the four clamping blocks. The receiving cylinder is connected to the side of the first sliding hole and internally communicates with the inside of the first sliding hole. The moving cylinder is arranged inside the receiving cylinder and is slidably connected to the inside of the receiving cylinder. The bottom of the first slider abuts against the top of the moving cylinder. Four limiting grooves are provided on the outer surface of the receiving cylinder, and each clamping block is slidably connected to the inner wall of the corresponding limiting groove. A first inclined surface is provided on the surface of the clamping block close to the moving cylinder. A number of extrusion blocks are provided on one side of the moving cylinder close to the clamping block, and each extrusion block is provided with a second inclined surface slidably connected to the first inclined surface, and the vertex of the clamping block is located at the middle position of the second inclined surface. At least four clamping grooves for clamping the clamping blocks are provided on one side of the receiving cylinder close to the rotating cylinder. An arc-shaped inclined surface slidably connected to the first inclined surface is provided on one side of the clamping groove. The bottom of each clamping block abuts against the top of the first valve core.

[0009] Further, a number of limiting blocks are provided on the side of the moving cylinder, and each limiting block is slidably connected to the inner wall of the limiting groove.

[0010] Further, a number of balls are provided on the top of the first valve core, and the bottom of each clamping block is in rolling connection with the balls.

[0011] Further, a receiving block is fixedly connected inside the air cylinder through a number of fixing frames, and the receiving block is arranged between the first piston and the hydraulic cylinder. One end of the third spring is fixedly connected to the first piston, and the other end of the third spring is fixedly connected to the receiving block. A receiving groove is provided inside the receiving block. An annular fixing groove is provided on the outer surface of the piston rod. A number of fixing blocks are provided inside the receiving groove, and a fixing mechanism for clamping each fixing block with the annular fixing groove is provided inside the receiving groove.

[0012] Further, the fixing mechanism includes a moving block, an elastic member, and a pneumatic pushing assembly for pushing the moving block to move. One end of the elastic member is fixedly connected to the side of the receiving groove, and the other end of the elastic member is fixedly connected to the side of the moving block. The moving block is slidably connected to the inner wall of the receiving groove. The cross-section of each fixing block is in a circular shape structure. A pushing block is fixedly connected inside the moving block. A third inclined surface slidably connected to the fixing block is provided on the side of the pushing block close to the first piston.

[0013] Further, the air pressure pushing component includes a first air inlet pipe, a second air inlet pipe, a second piston, and a second air outlet pipe. The second piston is arranged inside the accommodation groove and is slidably connected to the inner wall of the accommodation groove. One end of the second piston abuts against the side of the moving block away from the elastic member. One end of the first air inlet pipe is internally communicated with the air inlet, and the other end of the first air inlet pipe is internally communicated with the air cylinder. One end of the second air inlet pipe is connected to the side surface of the first air inlet pipe, and the second air inlet pipe is internally communicated with the first air inlet pipe. The other end of the second air inlet pipe is communicated with one end of the accommodation groove close to the piston, and the inner diameter of the second air inlet pipe is smaller than that of the first air inlet pipe. One end of the second air outlet pipe is communicated with one side of the accommodation groove close to the elastic member, and the other end of the second air outlet pipe is internally communicated with the first air outlet pipe.

[0014] Further, guide grooves are provided on both sides of the accommodation groove, and guide blocks are provided on both sides of the moving block. The guide blocks are slidably connected to the inner walls of the guide grooves.

[0015] The working principle and beneficial effects of the present invention are as follows: When the driver steps on the clutch pedal, the hydraulic oil enters the hydraulic cylinder through the oil inlet, and a certain pressure is formed on the piston rod, pushing the piston rod and the first piston forward. The first piston will drive the push rod to move and simultaneously stretch the third spring. The pressure of the hydraulic oil also acts on the first slider, pushing it downward to connect the compressed air port, the intake chamber, and the air inlet. The compressed air port is connected to other additional compressed air sources, and the compressed air sequentially enters the air cylinder through the compressed air port, the intake chamber, and the air inlet, further pushing the first piston and the push rod forward. When the driver releases the clutch pedal, the hydraulic oil retreats, and the locking mechanism of the present invention ensures that the compressed air port, the intake chamber, and the air inlet are still connected, enabling the compressed air to continue to enter the air cylinder and generating a certain pressure to overcome the restoring force of the third spring. Through this locking mechanism, when the driver releases the foot, the clutch remains in the disengaged state, making the gear shifting easier, reducing driving fatigue, greatly improving driving comfort, and at the same time enhancing the convenience and practicality of the booster, which is very friendly to novice drivers. When the driver completes the gear shifting, just step on the clutch pedal again. Secondly, the locking mechanism in the present invention is arranged inside the valve body, enabling it to have a locking function on the premise of minimizing the increase in the volume of the booster as much as possible. The design is ingenious and the structure is compact, minimizing the space occupied by the new booster to the greatest extent, facilitating the installation of the staff, and at the same time reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further elaborates on the present invention in detail in conjunction with the drawings and specific embodiments.

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the present invention; Figure 2 ForFigure 1 Enlarged schematic view at position A in Figure 3 is Figure 1 Enlarged schematic view at position B in Figure 4 is Figure 1 Enlarged schematic view at position C in Figure 5 Schematic diagram of the locking mechanism structure in this embodiment Figure 1 ; Figure 6 Schematic diagram of the locking mechanism structure in this embodiment Figure 2 ; Figure 7 Exploded schematic diagram of the locking mechanism in this embodiment.

[0018] In the figure: 1. Pneumatic cylinder; 101. Hydraulic cylinder; 102. Oil inlet; 103. Air inlet; 104. Exhaust port; 105. First piston; 106. Third spring; 107. Piston rod; 108. Push rod; 2. Valve body; 201. First valve core; 202. Second valve core; 203. First small spring; 204. Second large spring; 205. First air outlet pipe; 206. Compressed air port; 207. Air inlet cavity; 208. First sliding hole; 209. First slider; 210. Air outlet cavity; 211. Sealing cavity; 212. Air outlet; 213. Air outlet hole; 3. Accommodating cylinder; 301. Moving cylinder; 302. Block; 303. Rotating cylinder; 304. Limiting groove; 305. First inclined surface; 306. Extrusion block; 307. Second inclined surface; 308. Card slot; 309. Arc-shaped inclined surface; 310. Limiting block; 311. Ball; 4. Fixed frame; 401. Accommodating block; 402. Accommodating groove; 403. Annular fixing groove; 404. Fixed block; 405. Moving block; 406. Elastic member; 412. Pushing block; 407. Third inclined surface; 5. First air inlet pipe; 501. Second air inlet pipe; 502. Second piston; 503. Second air outlet pipe; 504. Guide groove; 505. Guide block; 506. Fourth inclined surface. Detailed implementation manners

[0019] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0020] Refer to Figures 1-7A novel clutch booster comprises a pneumatic cylinder 1 and a hydraulic cylinder 101 connected to the rear end of the pneumatic cylinder 1, an oil inlet 102 is provided on the side of the hydraulic cylinder 101 away from the pneumatic cylinder 1, an air inlet 103 is provided on the side of the pneumatic cylinder 1 close to the hydraulic cylinder 101, an exhaust port 104 is provided on the side of the pneumatic cylinder 1 away from the hydraulic cylinder 101, an output mechanism is provided in the pneumatic cylinder 1, and an intake and exhaust control valve is provided on the side of the hydraulic cylinder 101 close to the pneumatic cylinder 1; The air intake and exhaust control valve comprises a valve body 2 connected to the pneumatic cylinder 1 and the hydraulic cylinder 101, a first valve core 201, a second valve core 202, a first small spring 203, a second large spring 204, and a first air outlet pipe 205. The valve body 2 is provided with a first sliding hole 208 communicating with the interior of the hydraulic cylinder 101, and a first slider 209 is slidably connected inside the first sliding hole 208. A compressed air port 206 and an air intake cavity 207 communicating with the air intake port 103 are sequentially provided in the valve body 2 (the compressed air port 206 is used to connect a compressed air source). A locking mechanism is provided inside the valve body 2, and when the hydraulic oil retreats, the locking mechanism can ensure that the compressed air port 206, the air intake cavity 207, The air inlet 103 is in a connected state. When the hydraulic oil enters again, the locking mechanism will close the air inlet cavity 207 and the air inlet 103. One end of the first small spring 203 abuts against the bottom of the valve body 2, and the other end of the first small spring 203 abuts against the first valve core 201. One end of the second large spring 204 abuts against the bottom of the valve body 2, and the other end of the second large spring 204 abuts against the second valve core 202. The first small spring 203 is arranged inside the second large spring 204, and the first valve core 201 is arranged above the second valve core 202. The locking mechanism is arranged between the first slider 209 and the first valve core 201, and the first slider 209 is linked to the locking mechanism.

[0021] Furthermore, the output mechanism includes a first piston 105 that is slidably connected to the inside of the pneumatic cylinder 1, a third spring 106 that is arranged between the first piston 105 and the inner wall of the pneumatic cylinder 1, a piston rod 107 that is fixedly connected to the first piston 105 and one end of which extends to the inside of the hydraulic cylinder 101, and a push rod 108 that is hinged to the clutch rocker arm. The valve body 2 is provided with an air outlet cavity 210 at the bottom, a sealing cavity 211 is provided above the air outlet cavity 210, the second valve core 202 is slidably connected to the inner wall of the sealing cavity 211, one end of the first air outlet pipe 205 is connected to the exhaust port 104, the other end of the first air outlet pipe 205 is connected to the inside of the air outlet cavity 210, an air outlet 212 is provided inside the air outlet cavity 210, and a plurality of air outlet holes 213 are provided on the side of the second valve core 202 near the bottom. The locking mechanism is arranged between the first slider 209 and the first valve core 201, so that the booster can have a locking function without increasing the volume of the booster as much as possible. The clever design and compact structure minimize the space occupied by the new booster, making it easier for workers to install and also reducing production costs.

[0022] When the driver presses the clutch pedal, the hydraulic oil enters the hydraulic cylinder 101 through the oil inlet 102 and forms a certain pressure on the piston rod 107, pushing the piston rod 107 and the first piston 105 forward. The first piston 105 drives the push rod 108 to move and simultaneously stretches the third spring 106. The pressure of the hydraulic oil also acts on the first slider 209, pushing it downward to connect the compressed air port 206, the intake chamber 207, and the intake port 103. The compressed air port 206 is connected to other additional compressed air sources, and the compressed air sequentially enters the pneumatic cylinder 1 through the compressed air port 206, the intake chamber 207, and the intake port 103, further pushing the first piston 105 and the push rod 108 forward. When the driver releases the clutch pedal, the hydraulic oil retreats, but the locking mechanism of the present invention ensures that the compressed air port 206, the intake chamber 207, and the intake port 103 remain connected, enabling the compressed air to continue entering the pneumatic cylinder 1 and generating a certain pressure to overcome the restoring force of the third spring 106. Through this locking mechanism, when the driver releases the foot, the clutch remains in the disengaged state, thus making gear shifting easier, reducing driving fatigue, greatly enhancing driving comfort, and at the same time improving the convenience and practicality of the booster. When the driver completes gear shifting, simply press the clutch pedal again.

[0023] Specifically, the locking mechanism includes a receiving cylinder 3, a moving cylinder 301, four clamping blocks 302, and a rotating cylinder 303 connecting the four clamping blocks 302. The rotating cylinder 303 is fixedly connected to each clamping block 302. The receiving cylinder 3 is connected to the side of the first sliding hole 208 and internally communicates with the inside of the first sliding hole 208. The moving cylinder 301 is arranged inside the receiving cylinder 3 and is slidably connected to the inside of the receiving cylinder 3. The bottom of the first slider 209 abuts against the top of the moving cylinder 301. Four limiting grooves 304 are provided on the outer surface of the receiving cylinder 3, and each clamping block 302 is slidably connected to the inner wall of the corresponding limiting groove 304. A first inclined surface 305 is provided on the surface of each clamping block 302 close to the moving cylinder 301. A number of extrusion blocks 306 (each extrusion block 306 can be integrally formed with the moving cylinder 301) are provided on one side of the moving cylinder 301 close to the clamping block 302, and a second inclined surface 307 slidably connected to the first inclined surface 305 is provided on each extrusion block 306. At least eight extrusion blocks 306 are provided. Each clamping block 302 is circumferentially arranged with the moving cylinder 301 as the center. Each extrusion block 306 has a toothed shape structure, and the vertex of the clamping block 302 is located at the middle position of the second inclined surface 307. At least four clamping grooves 308 for clamping the clamping blocks 302 are provided on one side of the receiving cylinder 3 close to the rotating cylinder 303. An arc-shaped inclined surface 309 slidably connected to the first inclined surface 305 is provided on one side of the clamping groove 308. The bottom of each clamping block 302 abuts against the top of the first valve core 201, and the depth of the clamping groove 308 is less than the diameter of the air inlet cavity 207. When the clamping block 302 is clamped with the clamping groove 308, the top of the clamping block 302 contacts the bottom of the clamping groove 308, and at the same time, the compressed air port 206, the air inlet cavity 207, and the air inlet port 103 still remain in a communicating state.

[0024] When the driver steps on the clutch pedal, the hydraulic oil enters from the oil inlet 102 under the push of the clutch master cylinder and forms a certain pressure on the piston rod 107, pushing the piston rod 107 and the first piston 105 forward. The first piston 105 will drive the push rod 108 to move and simultaneously stretch the third spring 106. The air on the side of the air cylinder 1 far from the third spring 106 will enter the inside of the air outlet cavity 210 through the exhaust port 104 and the first air outlet pipe 205 and be discharged through the air outlet 212 in the air outlet cavity 210. When the hydraulic oil enters from the oil inlet 102 and pushes the first slider 209 to move downward, the first slider 209 will push the moving cylinder 301 downward, and the extrusion blocks 306 on the moving cylinder 301 will further push the clamping blocks 302 downward. Due to the limitation of the limiting groove 304, the vertex of the clamping block 302 always remains at the middle position of the second inclined surface 307. Under the push of the hydraulic oil, the extrusion blocks 306 drive the clamping blocks 302 to continue to move downward. At the same time, the bottom of each clamping block 302 will also push the first valve core 201 downward.

[0025] During the downward movement of the first spool 201, the first small spring 203 will be compressed. When the bottom of the first spool 201 contacts the top of the second spool 202, the second spool 202 will move downward under the action of the first spool 201 and compress the second large spring 204. At this time, the compressed air port 206, the intake chamber 207 and the intake port 103 remain in a connected state, and compressed air can enter the inside of the pneumatic cylinder 1 from the intake port 103. At this time, the position of the latch 302 is in a state of disengaging from the limit groove 304. When the latch 302 disengages from the limit groove 304, due to the lack of the limiting effect of the limit groove 304, the top position of the latch 302 will move to the bottom of the first inclined surface 305. At the same time, the rotating cylinder 303 will rotate a certain angle under the action of each latch 302.

[0026] When the driver releases the clutch pedal, the hydraulic oil will retreat, and the first small spring 203 will push the first spool 201 upward, thereby driving each latch 302 upward. Since the latch 302 has rotated a certain angle, the latch 302 will not extend into the limit groove 304 again, but will be caught in the card slot 308 through the arc-shaped inclined surface 309. This shortens the moving distance of the latch 302, so that the compressed air port 206, the intake chamber 207 and the intake port 103 still remain in a connected state. At this time, the top of the second spool 202 contacts the bottom of the first spool 201 under the action of the second large spring 204 to prevent compressed air from being exhausted through the exhaust to the inside of the valve body 2. Since compressed air always enters the intake port 103, the first piston 105 can keep the push rod 108 in an extended state.

[0027] In this embodiment, in order to prevent the moving cylinder 301 from being offset or rotated during the movement, a number of limit blocks 310 are provided on the side of the moving cylinder 301, and each limit block 310 is slidably connected to the inner wall of the limit groove 304. By providing the limit blocks 310, the moving cylinder 301 can only move along the direction of the limit groove 304, thereby preventing the moving cylinder 301 from having radial rotation or offset during the movement and improving the stability of locking.

[0028] Secondly, in order to reduce the contact area between each latch 302 and the top of the first spool 201, a number of balls 311 are provided on the top of the first spool 201, and the bottom of each latch 302 is in rolling connection with the balls 311. By providing the balls 311, the contact area between the first spool 201 and the latch 302 can be reduced, thereby reducing friction, making the rotation of the latch 302 smoother, and reducing the phenomenon of jamming during the rotation of the latch 302.

[0029] In this embodiment, in order to further prevent the push rod 108 from retracting when the driver releases the clutch pedal, a receiving block 401 is fixedly connected inside the pneumatic cylinder 1 through a plurality of fixing frames 4, and the receiving block 401 is arranged between the first piston 105 and the hydraulic cylinder 101. One end of the third spring 106 is fixedly connected to the first piston 105, and the other end of the third spring 106 is fixedly connected to the receiving block 401. A receiving groove 402 is provided inside the receiving block 401, an annular fixing groove 403 is provided on the outer surface of the piston rod 107, a plurality of fixing blocks 404 are provided inside the receiving groove 402, and a fixing mechanism for engaging each fixing block 404 with the annular fixing groove 403 is provided inside the receiving groove 402.

[0030] When the push rod 108 extends under the action of hydraulic oil, the provided fixing mechanism will engage each fixing block 404 with the annular fixing groove 403 on the surface of the piston rod 107. In this way, when the hydraulic oil retracts, the piston rod 107 can still maintain a locked state, thereby ensuring that the push rod 108 will not retract, and further ensuring the stable pushing of the push rod 108 on the clutch rocker arm.

[0031] Specifically, the fixing mechanism includes a moving block 405, an elastic member 406, and a pneumatic pushing assembly for pushing the moving block 405 to move. One end of the elastic member 406 is fixedly connected to the side surface of the receiving groove 402, the other end of the elastic member 406 is fixedly connected to the side surface of the moving block 405, the moving block 405 is slidably connected to the inner wall of the receiving groove 402, the cross-section of each fixing block 404 is in a circular shape structure, a pushing block 412 (the pushing block 412 and the moving block 405 can be integrally formed) is fixedly connected inside the moving block 405, and a third inclined surface 407 for slidably connecting with the fixing block 404 is provided on the side of the pushing block 412 close to the first piston 105. The overall shape structure of the fixing block 404 is spherical. Making the cross-section of the fixing block 404 in a circular shape structure can reduce the contact area between each fixing block 404 and the piston rod 107, make the movement of the piston rod 107 smoother, and reduce the phenomenon of jamming during the movement.

[0032] Further, the air pressure pushing component includes a first air inlet pipe 5, a second air inlet pipe 501, a second piston 502, and a second air outlet pipe 503. The second piston 502 is arranged inside the accommodating groove 402 and is slidably connected to the inner wall of the accommodating groove 402. One end of the second piston 502 abuts against the side of the moving block 405 away from the elastic member 406. One end of the first air inlet pipe 5 is internally communicated with the air inlet 103, and the other end of the first air inlet pipe 5 is internally communicated with the air cylinder 1. One end of the second air inlet pipe 501 is connected to the side surface of the first air inlet pipe 5 and is internally communicated with the first air inlet pipe 5. The other end of the second air inlet pipe 501 is communicated with the end of the accommodating groove 402 close to the piston, and the inner diameter of the second air inlet pipe 501 is smaller than that of the first air inlet pipe 5. One end of the second air outlet pipe 503 is communicated with the side of the accommodating groove 402 close to the elastic member 406, and the other end of the second air outlet pipe 503 is internally communicated with the first air outlet pipe 205.

[0033] When the driver steps on the clutch pedal, the hydraulic oil enters the hydraulic cylinder 101 through the oil inlet 102 and forms a certain pressure on the piston rod 107, pushing the piston rod 107 and the first piston 105 forward. The first piston 105 drives the push rod 108 to move and simultaneously stretches the third spring 106. The air on the side of the air cylinder 1 away from the third spring 106 inside will enter the inside of the air outlet cavity 210 through the exhaust port 104 and the first air outlet pipe 205 and is discharged through the air outlet 212 in the air outlet cavity 210. When the hydraulic oil enters from the oil inlet 102 and pushes the first slider 209 downward, the first slider 209 pushes the moving cylinder 301 downward, and the extrusion block 306 on the moving cylinder 301 further pushes the latch 302 downward. Due to the limitation of the limiting groove 304, the vertex of the latch 302 is always at the middle position of the second inclined surface 307. Under the push of the hydraulic oil, the extrusion block 306 drives the latch 302 to continue moving downward. At the same time, the bottom of each latch 302 also pushes the first valve core 201 downward.

[0034] During the downward movement of the first spool valve 201, the first small spring 203 will be compressed. When the bottom of the first spool valve 201 contacts the top of the second spool valve 202, the second spool valve 202 will move downward under the action of the first spool valve 201 and compress the second large spring 204. At this time, the compressed air port 206, the intake chamber 207 and the intake port 103 remain connected. Compressed air enters the first intake pipe 5 from the intake port 103, and then enters the inside of the air cylinder 1 through the other end of the first intake pipe 5, gradually filling the air cylinder 1 and pushing the first piston 105 forward, and stretching the third spring 106. When the side of the first piston 105 contacts the side of the air cylinder 1, the first piston 105 cannot move forward anymore. At this time, the position of the annular fixing groove 403 on the piston rod 107 corresponds to each fixing block 404, and the compressed air will enter the accommodating groove 402 through the second intake pipe 501 and push the second piston 502 to move. The second piston 502 will drive the moving block 405 to move in the direction of the compression elastic member 406, and the gas on the other side of the accommodating groove 402 will enter the first outlet pipe 205 through the second outlet pipe 503 and be discharged through the outlet port 212 of the outlet chamber 210. While the moving block 405 moves forward, the third inclined surface 407 of the pushing block 412 will push each fixing block 404 into the annular fixing groove 403, thereby realizing the fixation of the piston rod 107. The pneumatic pushing assembly in this embodiment does not require an additional air source, reducing the cost.

[0035] It should be noted that since the inner diameter of the second intake pipe 501 is much smaller than that of the first intake pipe 5, the compressed air will preferentially enter the inside of the air cylinder 1. According to the Hagen–Poiseuille's law, the volume flow rate Q of the fluid through the pipe (i.e., the volume flowing through per unit time) is proportional to the fourth power of the inner diameter of the pipe (radius r), and inversely proportional to the length L of the pipe and the viscosity η of the fluid. Therefore, when the radius increases, the volume flow rate of the fluid increases rapidly and the resistance decreases; conversely, when the radius decreases, the volume flow rate of the fluid decreases rapidly and the resistance increases. At the same time, the increase in the pipe length will also increase the resistance of the fluid flow.

[0036] According to Bernoulli's law in fluid mechanics, the gas will choose the path with less resistance to flow. Since the inner diameter of the first intake pipe 5 is larger and the length is much smaller than that of the second intake pipe 501, the resistance of the gas passing through the first intake pipe 5 to reach the inside of the air cylinder 1 is smaller. Therefore, the inside of the air cylinder 1 will be filled with gas faster than the accommodating groove 402.

[0037] To prevent the moving block 405 from shifting or misaligning during movement, guide grooves 504 are provided on both sides of the receiving groove 402, and guide blocks 505 are provided on both sides of the moving block 405. The guide blocks 505 are slidably connected to the inner walls of the guide grooves 504. By providing the guide grooves 504 and the guide blocks 505, it is possible to prevent the moving block 405 from rotating or misaligning during movement, thereby ensuring uniform force on the elastic member 406 and increasing the service life of the elastic member 406. Secondly, the guide block 505 can be abutted against the side of the guide groove 504 away from the elastic member 406. In this way, when the air on the side of the air cylinder 1 away from the third spring 106 is discharged through the first air outlet pipe 205, the gas will not enter the receiving groove 402 through the second air outlet pipe 503, thereby preventing the elastic member 406 from being stretched and further increasing the service life of the elastic member 406.

[0038] Working principle: When the driver steps on the clutch pedal, the hydraulic oil enters from the oil inlet 102 under the push of the clutch master cylinder and forms a certain pressure on the piston rod 107, pushing the piston rod 107 and the first piston 105 forward. The first piston 105 will drive the push rod 108 to move and simultaneously stretch the third spring 106. The air on the side of the air cylinder 1 away from the inside of the third spring 106 will enter the inside of the air outlet cavity 210 through the exhaust port 104 and the first air outlet pipe 205 and be discharged through the air outlet 212 in the air outlet cavity 210. When the hydraulic oil enters from the oil inlet 102 and pushes the first slider 209 downward, the first slider 209 will push the moving cylinder 301 downward, and the extrusion block 306 on the moving cylinder 301 will further push the clamping block 302 downward. Due to the limitation of the limiting groove 304, the vertex of the clamping block 302 is always at the middle position of the second inclined surface 307. Under the push of the hydraulic oil, the extrusion block 306 drives the clamping block 302 to continue to move downward. At the same time, the bottom of each clamping block 302 will also push the first valve core 201 downward.

[0039] During the downward movement of the first valve core 201, the first small spring 203 will be compressed. When the bottom of the first valve core 201 contacts the top of the second valve core 202, the second valve core 202 will move downward under the action of the first valve core 201 and compress the second large spring 204. At this time, the compressed air port 206, the intake cavity 207 and the intake port 103 are kept in a communicating state, and compressed air can enter the inside of the air cylinder 1 from the intake port 103 and push the first piston 105 forward. At this time, the clamping block 302 is in a state of disengaging from the limiting groove 304. When the clamping block 302 disengages from the limiting groove 304, due to the lack of the limiting effect of the limiting groove 304, the top position of the clamping block 302 will move to the bottom of the first inclined surface 305. At the same time, the rotating cylinder 303 will rotate a certain angle under the action of each clamping block 302.

[0040] When the driver releases the clutch pedal, the hydraulic oil will retreat, and the first small spring 203 will push the first valve core 201 upward, thereby driving each clamping block 302 upward. Since the clamping block 302 rotates a certain angle, the clamping block 302 will not extend into the limiting groove 304 again, but will be clamped into the clamping groove 308 through the arc-shaped inclined surface 309 (it should be noted that when the clamping block 302 is clamped to the bottom of the clamping groove 308, the top of the clamping block 302 will still be located at the middle position of the second inclined surface 307 of another extrusion block 306). In this way, the moving distance of the clamping block 302 is shortened, so that the compressed air port 206, the air inlet cavity 207 and the air inlet port 103 remain in a communicating state. At this time, the top of the second valve core 202 contacts the bottom of the first valve core 201 under the action of the second large spring 204 to prevent the compressed air from being exhausted through the exhaust port out of the valve body 2.

[0041] After the driver completes the gear shift, it is necessary to step on the clutch pedal again for a period of time and then release it. The hydraulic oil enters the inside of the hydraulic cylinder 101 again under the action of the clutch master cylinder. Since the piston rod 107 is in a fixed state and cannot continue to push, the hydraulic oil will squeeze the first slider 209 through the first sliding hole 208 and push the moving cylinder 301 downward. The extrusion block 306 corresponding to the clamping block 302 on the moving cylinder 301 will push the clamping block 302 out of the clamping groove 308. Since the top of the clamping block 302 is still located at the middle position of the second inclined surface 307, when the clamping block 302 is disengaged from the clamping groove 308, it will rotate a certain angle to align with the limiting groove 304. When the driver releases the foot, the hydraulic oil retreats, and the first small spring 203 and the second large spring 204 return to their deformed states, driving the first and second valve cores 202 back to their original positions, closing the air inlet cavity 207 and the air inlet port 103. At the same time, each clamping block 302 is driven by the first valve core 201 to insert into the limiting groove 304 and return to its original position. The moving cylinder 301 and the first slider 209 will also return to their original positions. Since there is no continuous air pressure in the accommodating groove 402, the elastic member 406 will return to its deformed state and gradually push the moving block 405 and the second piston 502 back to their original positions, so that the pushing block 412 disengages from the fixed block 404, thereby providing a moving space for the fixed block 404. The air in the accommodating groove 402 will be discharged through the second intake pipe 501, the first intake pipe 5, the air inlet port 103 and the exhaust port 104. To facilitate the disengagement of the piston rod 107 from the fixed block 404, fourth inclined surfaces 506 slidably connected to the fixed block 404 can be provided on both sides of the annular fixing groove 403 to reduce the jamming phenomenon. When the first piston 105 returns to its original position under the action of the third spring 106, the air inside the air cylinder 1 will be discharged successively through the first intake pipe 5, the air inlet port 103 and the exhaust port 104.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel clutch booster, comprising a pneumatic cylinder (1) and a hydraulic cylinder (101) connected to the rear end of the pneumatic cylinder (1), wherein the hydraulic cylinder (101) is provided with an oil inlet (102) on a side away from the pneumatic cylinder (1), an air inlet (103) on a side of the pneumatic cylinder (1) close to the hydraulic cylinder (101), an exhaust port (104) on a side of the pneumatic cylinder (1) away from the hydraulic cylinder (101), an output mechanism inside the pneumatic cylinder (1), and a hydraulic cylinder (101) close to the pneumatic cylinder (101). An intake and exhaust control valve is provided on one side of the cylinder (1), the intake and exhaust control valve comprising a valve body (2) connected to the pneumatic cylinder (1) and the hydraulic cylinder (101), a first valve core (201), a second valve core (202), a first small spring (203), a second large spring (204), and a first air outlet pipe (205); a first sliding hole (208) communicating with the interior of the hydraulic cylinder (101) is provided on the valve body (2), and a first sliding block (209) is slidably connected inside the first sliding hole (208), characterized in that: The valve body (2) is provided with a compressed air port (206) and an air intake chamber (207) connected to the air intake port (103) in sequence. The valve body (2) is provided with a locking mechanism inside. When the hydraulic oil is withdrawn, the locking mechanism can ensure that the compressed air port (206), the air intake chamber (207) and the air intake port (103) are in a connected state. When the hydraulic oil enters again, the locking mechanism will close the air intake chamber (207) and the air intake port (103). One end of the first small spring (203) is in contact with the bottom of the valve body (2). The other end of the spring (203) is in contact with the first valve core (201), one end of the second large spring (204) is in contact with the bottom of the valve body (2), the other end of the second large spring (204) is in contact with the second valve core (202), and the first small spring (203) is arranged inside the second large spring (204), the first valve core (201) is arranged above the second valve core (202), the locking mechanism is arranged between the first slider (209) and the first valve core (201), and the first slider (209) is linked to the locking mechanism.

2. A new type of clutch booster according to claim 1, characterized in that: The output mechanism comprises a first piston (105) slidably connected to the inside of the pneumatic cylinder (1), a third spring (106) arranged between the first piston (105) and the inner wall of the pneumatic cylinder (1), a piston rod (107) fixedly connected to the first piston (105) and one end of which extends into the inside of the hydraulic cylinder (101), and a push rod (108) hinged to the clutch rocker arm. An air outlet cavity (210) is provided at the bottom of the valve body (2), a sealing cavity (211) is provided above the air outlet cavity (210), the second valve core (202) is slidably connected to the inner wall of the sealing cavity (211), one end of the first air outlet pipe (205) is communicated with the exhaust port (104), the other end of the first air outlet pipe (205) is communicated with the inside of the air outlet cavity (210), an air outlet (212) is provided inside the air outlet cavity (210), and a plurality of air outlet holes (213) are provided on the side of the second valve core (202) near the bottom.

3. A new type of clutch booster according to claim 2, characterized in that: The locking mechanism comprises a accommodating cylinder (3), a moving cylinder (301), four clamping blocks (302) and a rotating cylinder (303) connected to the four clamping blocks (302); the accommodating cylinder (3) is connected to the side of the first sliding hole (208) and its interior is communicated with the interior of the first sliding hole (208); the moving cylinder (301) is arranged inside the accommodating cylinder (3) and is slidably connected to the interior of the accommodating cylinder (3); the bottom of the first sliding block (209) abuts against the top of the moving cylinder (301); four limiting grooves (304) are provided on the outer surface of the accommodating cylinder (3); each of the clamping blocks (302) is slidably connected to the inner wall of the corresponding limiting groove (304); the clamping blocks (302) are close to the moving cylinder (209); A first inclined surface (305) is provided on the surface of the movable cylinder (301); a plurality of extrusion blocks (306) are provided on a side of the movable cylinder (301) close to the block (302); each extrusion block (306) is provided with a second inclined surface (307) slidably connected to the first inclined surface (305); and the vertex of the block (302) is located in the middle of the second inclined surface (307); at least four card slots (308) are provided on a side of the accommodating cylinder (3) close to the rotating cylinder (303); one side of the card slot (308) is provided with an arc-shaped inclined surface (309) slidably connected to the first inclined surface (305); and the bottom of each of the card blocks (302) abuts against the top of the first valve core (201).

4. A new type of clutch booster according to claim 3, characterized in that: A plurality of limit blocks (310) are provided on the side of the movable cylinder (301), and each limit block (310) is slidably connected to the inner wall of the limit groove (304).

5. A new type of clutch booster according to claim 3, characterized in that: A plurality of balls (311) are provided on the top of the first valve core (201), and the bottom of each clamping block (302) is rollingly connected to the balls (311).

6. A new type of clutch booster according to claim 3, characterized in that: A receiving block (401) is fixedly connected to the inside of the pneumatic cylinder (1) via a plurality of fixing frames (4), and the receiving block (401) is arranged between the first piston (105) and the hydraulic cylinder (101); one end of the third spring (106) is fixedly connected to the first piston (105), and the other end of the third spring (106) is fixedly connected to the receiving block (401); a receiving groove (402) is arranged inside the receiving block (401); an annular fixing groove (403) is arranged on the outer surface of the piston rod (107); a plurality of fixing blocks (404) are arranged inside the receiving groove (402); and a fixing mechanism is arranged inside the receiving groove (402) for engaging each fixing block (404) with the annular fixing groove (403).

7. A new type of clutch booster according to claim 6, characterized in that: The fixing mechanism comprises a moving block (405), an elastic member (406) and a pneumatic pushing assembly for pushing the moving block (405) to move, one end of the elastic member (406) is fixedly connected to the side of the accommodating groove (402), the other end of the elastic member (406) is fixedly connected to the side of the moving block (405), the moving block (405) is slidably connected to the inner wall of the accommodating groove (402), the cross section of each of the fixing blocks (404) is a circular structure, a pushing block (412) is fixedly connected inside the moving block (405), and a third inclined surface (407) slidably connected to the fixing block (404) is provided on a side of the pushing block (412) close to the first piston (105).

8. A new type of clutch booster according to claim 7, characterized in that: The air pressure push assembly comprises a first air inlet pipe (5), a second air inlet pipe (501), a second piston (502), and a second air outlet pipe (503); the second piston (502) is arranged inside the receiving groove (402) and is slidably connected to the inner wall of the receiving groove (402); one end of the second piston (502) abuts against a side of the moving block (405) away from the elastic member (406); one end of the first air inlet pipe (5) is connected to the inside of the air inlet port (103); the other end of the first air inlet pipe (5) is connected to the inside of the air pressure cylinder (1); One end of the second air inlet pipe (501) is connected to the side of the first air inlet pipe (5), and the second air inlet pipe (501) is communicated with the interior of the first air inlet pipe (5); the other end of the second air inlet pipe (501) is communicated with one end of the accommodating groove (402) close to the piston, and the inner diameter of the second air inlet pipe (501) is smaller than the inner diameter of the first air inlet pipe (5); one end of the second air outlet pipe (503) is communicated with one side of the accommodating groove (402) close to the elastic member (406), and the other end of the second air outlet pipe (503) is communicated with the interior of the first air outlet pipe (205).

9. A new type of clutch booster according to claim 7, characterized in that: Guide grooves (504) are provided on both sides of the accommodating groove (402), guide blocks (505) are provided on both sides of the moving block (405), and the guide blocks (505) are slidably connected to the inner wall of the guide groove (504).

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