Three-stroke multi-station dual-purpose air energy engine

Abstract

The invention relates to a three-stroke multi-station dual-purpose air energy engine with higher power. The three-stroke multi-station dual-purpose air energy engine comprises an engine body and an output shaft, and is characterized in that a first cylinder body hole, a second cylinder body hole and a third cylinder body hole are sequentially formed in the engine body in the axial direction; a first cylinder body is arranged in the first cylinder body hole, a second cylinder body is arranged in the second cylinder body hole, and a third cylinder body is arranged in the third cylinder body hole; a first piston is movably arranged in the first cylinder body and is in transmission connection with the output shaft through a first connecting rod, a second piston is movably arranged in the second cylinder body, and a third piston is movably arranged in the third cylinder body and is in transmission connection with the output shaft through a third connecting rod; the first cylinder body is provided with a first air inlet hole. According to the three-stroke multi-station dual-purpose air energy engine, the structure is improved, each station is provided with three pistons used for driving the output shaft to rotate, the lever principle is fully utilized to be maximized, and therefore the output power of the output shaft is remarkably improved.

Description

Technical Field

[0001] The present invention relates to a pneumatic motor, and more particularly to a three-stroke multi-station dual-purpose air energy engine. Background Art

[0002] A pneumatic motor is a device that converts the pressure energy of compressed air into rotational mechanical energy. Generally, it serves as the rotational power source for more complex devices or machines. Pneumatic motors are classified by structure into: vane-type pneumatic motors and piston-type pneumatic motors. A piston-type pneumatic motor is a pneumatic motor that converts the linear motion of several pistons into rotational motion through a crankshaft or swash plate. The applicant has previously applied for an invention patent named "A High-pressure and High-efficiency Piston-type Pneumatic Motor" (publication number: CN118242146A). This high-pressure and high-efficiency piston-type pneumatic motor includes a body, an output shaft, and multiple piston connecting rod mechanisms. The piston connecting rod mechanism can drive the output shaft to rotate through the crankshaft. Multiple cylinder holes are equally distributed on the body, and a second cylinder is provided in each cylinder hole. The piston connecting rod mechanism includes a piston and a connecting rod assembly, and the piston is movably arranged in the second cylinder; the body has an inner hole, and an air distribution sleeve is installed in the inner hole of the body. The output shaft is arranged in the air distribution sleeve, and a first air exchange chamber, a second air exchange chamber, and multiple air distribution holes are axially arranged on the air distribution sleeve. This high-pressure and high-efficiency piston-type pneumatic motor, through the improvement of the structure, has a shorter intake path, and the pressure energy directly acts on the piston in the front, thereby improving the energy conversion efficiency and being more suitable for high pressure. However, only one piston in each cylinder of this pneumatic motor is used to drive the output shaft to rotate, and the output power and working efficiency still cannot reach the maximum. Especially, it does not have the function for the air compression field. When it is connected to an electric motor and driven to operate, its compression efficiency is extremely low. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention innovatively provides a three-stroke multi-station dual-purpose air energy engine with higher power.

[0004] This three-stroke multi-station dual-purpose air energy engine includes a body and an output shaft, and is characterized in that: a first cylinder hole, a second cylinder hole and a third cylinder hole are sequentially arranged on the body along the axial direction; a first cylinder is arranged in the first cylinder hole, a second cylinder is arranged in the second cylinder hole, and a third cylinder is arranged in the third cylinder hole; a first piston is movably arranged in the first cylinder, and the first piston is connected to the output shaft through a first connecting rod; a second piston is movably arranged in the second cylinder, and a third piston is movably arranged in the third cylinder, and the third piston is connected to the output shaft through a third connecting rod; A first air inlet hole is provided on a cylinder body, and the first air inlet hole leads to the bottom of the first piston; a third air inlet hole is provided on a third cylinder body, and the third air inlet hole leads to the bottom of the third piston; the body has an inner hole, and a gas distribution sleeve is installed in the inner hole of the body, and the output shaft is arranged in the gas distribution sleeve, and a first air exchange chamber, a second air exchange chamber and an air distribution hole are axially provided on the gas distribution sleeve, and the air distribution hole is located between the first air exchange chamber and the second air exchange chamber; the air distribution hole is communicated with the first air inlet hole through a first through hole on the body, and the air distribution hole is communicated with the top of the second cylinder body through a second through hole on the body, The air distribution hole is communicated with the third air inlet hole through the third through hole on the body; the body is provided with a first swing arm seat and a second swing arm seat, the first swing arm is hinged on the first swing arm seat, one end of the first swing arm is connected to the first piston in a driving manner, and the other end of the first swing arm is connected to the second piston in a driving manner, the second swing arm is hinged on the second swing arm seat, one end of the second swing arm is connected to the third piston in a driving manner, and the other end of the second swing arm is connected to the second piston in a driving manner; the body is provided with a first vent hole and a second vent hole along the axial direction of the inner hole, and the first vent hole of the body is connected to the first exchange hole of the air distribution sleeve The air cavities are communicated, and the second ventilation hole of the body is communicated with the second ventilation cavity of the air-distributing sleeve; one side of the outer wall of the output shaft has a first groove-shaped ventilation position, and the first groove-shaped ventilation position of the output shaft is communicated with the first ventilation cavity of the air-distributing sleeve; when the output shaft rotates, the first groove-shaped ventilation position of the output shaft can communicate the first ventilation cavity of the air-distributing sleeve with the air-distributing hole; the other side of the outer wall of the output shaft has a second groove-shaped ventilation position, and the second groove-shaped ventilation position of the output shaft is communicated with the second ventilation cavity of the air-distributing sleeve; when the output shaft rotates, the second groove-shaped ventilation position of the output shaft can communicate the second ventilation cavity of the air-distributing sleeve with the air-distributing hole.

[0005] The first piston is connected to the first slider. The first cylinder block is connected to a first guide rod. The first slider is slidably disposed on the first guide rod. The first slider is in transmission connection with the first swing arm through a first swing arm inner rod. One end of the first swing arm inner rod is hinged to the first slider. One end of the first swing arm has a first movable hole, and the other end of the first swing arm inner rod is located in the first movable hole of the first swing arm. The second piston is connected to the second slider. The second cylinder block is connected to a second guide rod. The second slider is slidably disposed on the second guide rod. The second slider is in transmission connection with the first swing arm through a second swing arm inner rod. One end of the second swing arm inner rod is hinged to the second slider. The other end of the first swing arm has a second movable hole, and the other end of the second swing arm inner rod is located in the second movable hole of the first swing arm.

[0006] The third piston is connected to the third slider. The third cylinder block is connected to a third guide rod. The third slider is slidably disposed on the third guide rod. The third slider is in transmission connection with the second swing arm through a third swing arm inner rod. One end of the third swing arm inner rod is hinged to the third slider. One end of the second swing arm has a third movable hole, and the other end of the third swing arm inner rod is located in the third movable hole of the second swing arm. The second slider is in transmission connection with the second swing arm through a fourth swing arm inner rod. One end of the fourth swing arm inner rod is hinged to the second slider. The other end of the second swing arm has a fourth movable hole, and the other end of the fourth swing arm inner rod is located in the fourth movable hole of the second swing arm.

[0007] The first slider has a first guide groove, and the first guide rod is slidably disposed in the first guide groove. The second slider has a second guide groove, and the second guide rod is slidably disposed in the second guide groove. The third slider has a third guide groove, and the third guide rod is slidably disposed in the third guide groove.

[0008] An annular sealing groove is provided on the contact surfaces of the first piston, the second piston, and the third piston, and an engineering plastic ring is provided in the annular sealing groove.

[0009] A fluororubber ring is provided in the annular sealing groove, and the engineering plastic ring is located outside the fluororubber ring.

[0010] An intake one-way valve is connected to the first ventilation hole, and an exhaust one-way valve is connected to the second ventilation hole.

[0011] According to a three-stroke multi-station dual-purpose air energy engine provided by the present invention, through the improvement of the structure, each station has three pistons for driving the output shaft to rotate, and the lever principle is also maximally utilized, thereby significantly improving the output power of the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the present invention; Figure 2 is Figure 1 a sectional view taken along the A-A direction in Figure 3 is Figure 2 a partial sectional view of Figure 4 is an assembly drawing of the output shaft and the valve timing sleeve; Figure 5 is the front view of the output shaft; Figure 6 is the sectional view of the valve timing sleeve; Figure 7 is a schematic diagram of the first cylinder block and the first piston; Figure 8 is a schematic diagram of the second cylinder block and the second piston; Figure 9 is the sectional view of the second piston; Figure 10 is the bottom view of the first slider; Figure 11 is Figure 10 a sectional view taken along the B-B direction in Figure 12 is Figure 10 a sectional view taken along the C-C direction in Figure 13 is a schematic diagram of the first slider and the first guide rod; Figure 14 is a schematic diagram of the multi-purpose structure of the present invention; Figure 15 is the sectional view of the second piston (another structure). Detailed implementation manners

[0013] As Figure 1 and Figure 2 shown, this three-stroke multi-station dual-purpose air energy engine includes a body 2 and an output shaft 1. A plurality of stations are provided on the body 2 along the circumferential direction ( Figure 1 There are 5 stations in Figure 2 and Figure 3 shown). Along the axial direction, each station on the body 2 is sequentially provided with a first cylinder block hole 26, a second cylinder block hole 25, and a third cylinder block hole 27; a first cylinder block 50 is provided in the first cylinder block hole 26, a second cylinder block 40 is provided in the second cylinder block hole 25, and a third cylinder block 60 is provided in the third cylinder block hole 27; a first piston 5 is movably provided in the first cylinder block 50 (as Figure 7As shown in the figure, the first piston 5 is drivingly connected to the output shaft 1 through the first connecting rod 55. A second piston 4 is movably arranged in the second cylinder block 40, and a third piston 6 is movably arranged in the third cylinder block 60. The third piston 6 is drivingly connected to the output shaft 1 through the third connecting rod 65. When the first piston 5 and the third piston 6 reciprocate, they can drive the output shaft 1 to rotate through the first connecting rod 55 and the third connecting rod 65 respectively, thereby realizing power output.

[0014] In order to drive the first piston 5 and the third piston 6 to perform piston movement, as Figure 7 shown, a first air inlet hole 53 is provided on the first cylinder block 50. The first air inlet hole 53 leads to the lower part of the first piston 5. As Figure 7 shown, after the gas enters the first cylinder block 50, it acts on the lower part of the first piston 5 and pushes the first piston 5 to move upward (the up and down directions here refer to the direction as Figure 7 shown); similarly, as Figure 3 shown, a third air inlet hole 63 is provided on the third cylinder block 60. The third air inlet hole 63 leads to the lower part of the third piston 6. After the gas enters the third cylinder block 60, it acts on the lower part of the third piston 6 and pushes the third piston 6 to move upward.

[0015] In order to allow the gas to enter the first cylinder block 50, the second cylinder block 40 and the third cylinder block 60, as Figure 2 shown, a first ventilation hole 20 and a second ventilation hole 21 are axially provided along the inner hole of the body 2. The air pressure enters from the first ventilation hole 20 and exits from the second ventilation hole 21; the body 2 has an inner hole, and a gas distribution sleeve 3 is installed in the inner hole of the body 2. As Figure 6 shown, a first air exchange cavity 31, a second air exchange cavity 32 and air distribution holes 33 (each station corresponds to an air distribution hole 33) are axially provided on the gas distribution sleeve 3. The air distribution holes 33 are located between the first air exchange cavity 31 and the second air exchange cavity 32; among them, the first ventilation hole 20 of the body 2 is communicated with the first air exchange cavity 31 of the gas distribution sleeve 3, and the second ventilation hole 21 of the body 2 is communicated with the second air exchange cavity 32 of the gas distribution sleeve 3; as Figure 4 shown, the output shaft 1 is arranged in the gas distribution sleeve 3. As Figure 5 shown, one side of the outer wall of the shaft of the output shaft 1 has a first groove-shaped air exchange position 11. The first groove-shaped air exchange position 11 of the output shaft 1 is communicated with the first air exchange cavity 31 of the gas distribution sleeve 3. When the output shaft 1 rotates, the first groove-shaped air exchange position 11 of the output shaft 1 can communicate the first air exchange cavity 31 of the gas distribution sleeve 3 with the air distribution holes 33; the other side of the outer wall of the shaft of the output shaft 1 has a second groove-shaped air exchange position 12. The second groove-shaped air exchange position 12 of the output shaft 1 is communicated with the second air exchange cavity 32 of the gas distribution sleeve 3. When the output shaft 1 rotates, the second groove-shaped air exchange position 12 of the output shaft 1 can communicate the second air exchange cavity 32 of the gas distribution sleeve 3 with the air distribution holes 33. As Figure 3As shown, the air distribution hole 33 communicates with the first air inlet hole 53 through the first through hole 23 on the body 2, and the air distribution hole 33 communicates with the upper part of the second cylinder block 40 through the second through hole 22 on the body 2 (as Figure 8 shown, the gas acts on the second piston 4 from above, pushing the second piston 4 to move downward), and the air distribution hole 33 communicates with the third air inlet hole 63 through the third through hole 24 on the body 2.

[0016] During operation, the air pressure enters from the first ventilation hole 20. When the first groove-shaped air change position 11 of the output shaft 1 communicates the first air change chamber 31 of the air distribution sleeve 3 with the air distribution hole 33, the air pressure enters the first air change chamber 31 of the air distribution sleeve 3, then enters the first groove-shaped air change position 11 of the output shaft 1, then enters the air distribution hole 33, and then flows through the first through hole 23, the second through hole 22, and the third through hole 24 respectively, and enters the first cylinder block 50, the second cylinder block 40, and the third cylinder block 60 respectively. The air pressure entering the first cylinder block 50 pushes the first piston 5 to move upward, the air pressure entering the third cylinder block 60 pushes the third piston 6 to move upward, and the air pressure entering the second cylinder block 40 pushes the second piston 4 to move downward. The movement of the first piston 5 and the third piston 6 drives the output shaft 1 to rotate and output; when the output shaft 1 rotates, so that the second groove-shaped air change position 12 of the output shaft 1 can communicate the second air change chamber 32 of the air distribution sleeve 3 with the air distribution hole 33, since the intake of the first ventilation hole 20 is cut off (as Figure 4 shown), and the air pressure in the first cylinder block 50, the second cylinder block 40, and the third cylinder block 60 returns along the original path, passes through the air distribution hole 33, enters the second groove-shaped air change position 12 of the output shaft 1, and then enters the second ventilation hole 21 of the body 2 through the second air change chamber 32 of the air distribution sleeve 3, thereby realizing exhaust; and during the exhaust process, the first piston 5 and the third piston 6 move downward to reset, and the second piston 4 moves upward to reset; in such a cycle, the first piston 5 and the third piston 6 drive the output shaft 1 to rotate and output.

[0017] In order to establish a transmission connection between the first piston 5, the second piston 4, and the third piston 6, as Figure 3As shown in the figure, a first swing arm seat 70 and a second swing arm seat 80 are provided on the body 2. A first swing arm 7 is hinged on the first swing arm seat 70. One end of the first swing arm 7 is drivingly connected to the first piston 5, and the other end of the first swing arm 7 is drivingly connected to the second piston 4. A second swing arm 8 is hinged on the second swing arm seat 80. One end of the second swing arm 8 is drivingly connected to the third piston 6, and the other end of the second swing arm 8 is drivingly connected to the second piston 4. With this structure, when the second piston 4 moves downward, the first piston 5 and the third piston 6 move upward. When the second piston 4 moves upward, the first piston 5 and the third piston 6 move downward. That is, the movement direction of the second piston 4 is always opposite to the movement directions of the first piston 5 and the third piston 6. Although the second piston 4 does not directly drive the output shaft 1 to rotate, the second piston 4 respectively drives the first piston 5 and the third piston 6 to act through the first swing arm 7 and the second swing arm 8. In this way, using the lever principle, the rotation of the output shaft 1 is driven by the movement of the three pistons, thereby greatly improving the output power.

[0018] As Figure 3 shown, the first piston 5 is connected to the first slider 51 (as Figures 10 - 11 is the structural schematic diagram of the first slider 51), and the first cylinder block 50 is connected to the first guide rod 54. As Figure 13 shown, the first slider 51 is slidably arranged on the first guide rod 54. The first slider 51 is drivingly connected to the first swing arm 7 through the first swing arm inner rod 52. One end of the first swing arm inner rod 52 is hinged to the first slider 51. One end of the first swing arm 7 has a first movable hole, and the other end of the first swing arm inner rod 52 is located in the first movable hole of the first swing arm 7. The second piston 4 is connected to the second slider 44. The second cylinder block 40 is connected to the second guide rod 41. The second slider 44 is slidably arranged on the second guide rod 41. The second slider 44 is drivingly connected to the first swing arm 7 through the second swing arm inner rod 42. One end of the second swing arm inner rod 42 is hinged to the second slider 44. The other end of the first swing arm 7 has a second movable hole, and the other end of the second swing arm inner rod 42 is located in the second movable hole of the first swing arm 7. With this structure, when the second piston 4 moves downward, the second slider 44 moves downward along the second guide rod 41. In this way, the first swing arm 7 is driven to swing through the second swing arm inner rod 42. The first swing arm 7 drives the first slider 51 to move upward along the first guide rod 52 through the first swing arm inner rod 52, thereby driving the first piston 5 to move upward, thus establishing a transmission relationship between the second piston 4 and the first piston 5 and making the second piston 4 and the first piston 5 move in opposite directions.

[0019] As Figure 2As shown, similarly, the third piston 6 is connected to the third slider 61. A third guide rod 64 is connected to the third cylinder block 60. The third slider 61 is slidably disposed on the third guide rod 64. The third slider 61 is drivingly connected to the second swing arm 8 through the third swing arm inner rod 62. One end of the third swing arm inner rod 62 is hinged to the third slider 61. One end of the second swing arm 8 has a third moving hole, and the other end of the third swing arm inner rod 62 is located in the third moving hole of the second swing arm 8. The second slider 44 is drivingly connected to the second swing arm 8 through the fourth swing arm inner rod 43. One end of the fourth swing arm inner rod 43 is hinged to the second slider 44. The other end of the second swing arm 8 has a fourth moving hole, and the other end of the fourth swing arm inner rod 43 is located in the fourth moving hole of the second swing arm 8. With this structure, when the second piston 4 moves downward, the second slider 44 moves downward along the second guide rod 41. In this way, the second swing arm 8 is driven to swing through the fourth swing arm inner rod 43. The second swing arm 8 drives the third slider 61 to move upward along the third guide rod 64 through the third swing arm inner rod 62. In this way, the third piston 6 is driven to move upward, thereby establishing a transmission relationship between the second piston 4 and the third piston 6 and making the second piston 4 and the third piston 6 move in opposite directions.

[0020] As Figure 10 shown, the first slider 51 has a first guide groove 510. As Figure 13 shown, the first guide rod 54 is slidably disposed in the first guide groove 510, so that the first slider 51 can move smoothly along the first guide rod 54. The second slider 44 has a second guide groove, and the second guide rod 41 is slidably disposed in the second guide groove, so that the second slider 44 can move smoothly along the second guide rod 41. The third slider 61 has a third guide groove, and the third guide rod 64 is slidably disposed in the third guide groove, so that the third slider 61 can move smoothly along the third guide rod 64.

[0021] To further reduce the friction of the piston, as Figure 8 shown, annular sealing grooves are provided on the contact surfaces of the first piston 5, the second piston 4, and the third piston 6. An engineering plastic ring 18 is provided in the annular sealing groove (the material of the engineering plastic ring 18 contains copper powder, has good wear resistance, a smooth and shiny outer surface, a low friction coefficient, good wear resistance, and can withstand high temperatures of not less than 300°). Since the engineering plastic ring 18 is smoother and has low noise, when it contacts the inner wall of the cylinder block, it can greatly reduce the friction coefficient and improve the durability of the piston.

[0022] To enable the engineering plastic ring 18 to act elastically on the inner wall of the cylinder block or the second cylinder block and improve the sealing performance, as Figure 9 shown, a fluororubber ring 19 (which can withstand high temperatures above 200 degrees) is provided in the annular sealing groove. The engineering plastic ring 18 is located outside the fluororubber ring 19. Since the fluororubber ring 19 has elasticity, the engineering plastic ring 18 can act elastically on the inner wall of the cylinder block, ensuring the sealing performance between the piston 31 and the inner wall of the cylinder block.

[0023] To protect the transmission mechanism between the pistons, a cylinder head 9 is installed on the engine block 2. The cylinder head 9 can protect the pistons and the transmission mechanism between the pistons. Engine oil is filled in the cylinder head 9 to lubricate and cool the swing arm, the inner rod of the swing arm, the slider, etc.

[0024] The above principle content means that the air source is connected to the first ventilation hole 20 through a trachea. As Figure 2 shown, under the action of air pressure, three pistons are simultaneously pushed to act. The air after doing work is discharged from the second ventilation hole 21, driving the output shaft 1 to rotate and output power, thus realizing an air energy engine powered by air.

[0025] As Figure 14 shown, when the output shaft of this machine is connected to an electric motor, the electric motor drives the output shaft to rotate. An intake check valve 200 is connected to the first ventilation hole 20 to ensure only intake and no exhaust (i.e., inhalation), and an exhaust check valve 210 is connected to the second ventilation hole 21 to ensure only exhaust and no intake (i.e., exhaust). The gas enters from the intake check valve 200, enters the cylinder body, causing the three pistons in a group of work positions to act simultaneously to compress the gas in the cylinder body. The compressed gas exits from the exhaust check valve 210 and then is input into the storage tank for storage, thus realizing the function of air compression.

[0026] As Figure 2 shown, this three-stroke multi-station dual-purpose air energy engine is provided with an output shaft, and the intake port of the three-stroke multi-station dual-purpose air energy engine is connected to the outlet port of the storage tank. When the customer needs to use air as power, the compressed air in the storage tank is used to drive the output shaft to rotate, thus acting as a pneumatic motor. When the customer needs compressed air, the output shaft provided by this three-stroke multi-station dual-purpose air energy engine is connected to an electric motor, and the electric motor drives the output shaft, so that the air can be compressed and stored in the storage tank.

[0027] As Figure 14 shown, this three-stroke multi-station dual-purpose air energy engine can also be provided with two output shafts. One output end is used to connect to a generator, and the other output end is used to connect to an electric motor. For example: when there is valley electricity at night (the electricity cost is cheap), the electric motor is used to drive the output shaft to rotate, thus realizing work, and the generated compressed air source is stored in the air tank through the exhaust check valve 210. When it is daytime (the electricity cost is more expensive), the compressed air in the air tank is input into the first ventilation hole 20 to drive the output shaft to rotate, thus driving the generator to generate electricity (of course, a clutch device system is also needed to cooperate to complete this. The clutch device system is an existing technology and will not be introduced in detail). The electricity generated by the generator can be connected to the power grid or energy storage equipment. In this way, a reasonable energy utilization plan can be provided for the customer.

[0028] Vent holes 71 are provided on both the first swing arm 7 and the second swing arm 8. The vent holes 71 communicate the moving holes with the outside. When the inner rod of the swing arm reciprocates in the moving hole of the swing arm, the generated gas is discharged from the vent holes.

[0029] As Figure 1 shown, a first eccentric wheel 15 is connected to the output shaft 1. A first connecting rod 55 is hinged to the first eccentric wheel 15. A second eccentric wheel 16 is connected to the output shaft 1. A first connecting rod 65 is hinged to the second eccentric wheel 16. A counterweight 17 is connected to the output shaft 1. The center of gravity of the counterweight 17 is symmetrical to the centers of gravity of the first eccentric wheel 15 and the second eccentric wheel 16 with respect to the axis of the output shaft 1. The counterweight 17 can balance the eccentric weights of the two eccentric wheels, playing a balancing role and making the operation more stable.

[0030] Finally, it is worth mentioning that the piston can adopt the structure as Figure 15 shown (including a first piston, a second piston, and a third piston). This kind of piston is suitable for high-speed and high-pressure situations. The end of this piston is connected with an end cover 47 by bolts. The outer end of the end cover 47 has a pressing surface 470. The end of the piston has a step 46. The pressing surface 470 of the end cover 47 presses the engineering plastic ring 18 on the step 46 of the piston, making the engineering plastic ring 18 more firm and preventing the engineering plastic ring 18 from falling off.

Claims

1. Three-stroke multi-station dual-purpose air energy engine, comprising an organism (2) and an output shaft (1), characterized in that: The machine body (2) is successively provided with a first cylinder hole (26), a second cylinder hole (25), and a third cylinder hole (27) along the axial direction; a first cylinder body (50) is arranged in the first cylinder hole (26), a second cylinder body (40) is arranged in the second cylinder hole (25), and a third cylinder body (60) is arranged in the third cylinder hole (27); a first piston (5) is movably arranged in the first cylinder body (50), the first piston (5) is in transmission connection with the output shaft (1) through a first connecting rod (55), a second piston (4) is movably arranged in the second cylinder body (40), a third piston (6) is movably arranged in the third cylinder body (60), and the third piston (6) is in transmission connection with the output shaft (1) through a third connecting rod (65); a first air inlet hole (53) is arranged on the first cylinder body (50), the first air inlet hole (53) leads to the lower part of the first piston (5), a third air inlet hole (63) is arranged on the third cylinder body (60), and the third air inlet hole (63) leads to the lower part of the third piston (6); the machine body (2) has an inner hole, an air distribution sleeve (3) is installed in the inner hole of the machine body (2), the output shaft (1) is arranged in the air distribution sleeve (3), a first air exchange cavity (31), a second air exchange cavity (32), and an air distribution hole (33) are successively arranged on the air distribution sleeve (3) along the axial direction, and the air distribution hole (33) is located between the first air exchange cavity (31) and the second air exchange cavity (32); the air distribution hole (33) is communicated with the first air inlet hole (53) through a first through hole (23) on the machine body (2), the air distribution hole (33) is communicated with the upper part of the second cylinder body (40) through a second through hole (22) on the machine body (2), and the air distribution hole (33) is communicated with the third air inlet hole (63) through a third through hole (24) on the machine body (2); a first swing arm seat (70) and a second swing arm seat (80) are arranged on the machine body (2), a first swing arm (7) is hinged on the first swing arm seat (70), one end of the first swing arm (7) is in transmission connection with the first piston (5), the other end of the first swing arm (7) is in transmission connection with the second piston (4), a second swing arm (8) is hinged on the second swing arm seat (80), one end of the second swing arm (8) is in transmission connection with the third piston (6), and the other end of the second swing arm (8) is in transmission connection with the second piston (4); a first ventilation hole (20) and a second ventilation hole (21) are arranged on the machine body (2) along the axial direction of the inner hole, the first ventilation hole (20) of the machine body (2) is communicated with the first air exchange cavity (31) of the air distribution sleeve (3), and the second ventilation hole (21) of the machine body (2) is communicated with the second air exchange cavity (32) of the air distribution sleeve (3); one side of the outer wall of the shaft of the output shaft (1) has a first groove-shaped air exchange position (11), and the first groove-shaped air exchange position (11) of the output shaft (1) is communicated with the first air exchange cavity (31) of the air distribution sleeve (3); when the output shaft (1) rotates, the first groove-shaped air exchange position (11) of the output shaft (1) can communicate the first air exchange cavity (31) of the air distribution sleeve (3) with the air distribution hole (33);On the other side of the outer wall of the shaft of the output shaft (1), there is a second groove-shaped air exchange position (12). The second groove-shaped air exchange position (12) of the output shaft (1) communicates with the second air exchange cavity (32) of the air distribution sleeve (3); when the output shaft (1) rotates, the second groove-shaped air exchange position (12) of the output shaft (1) can communicate the second air exchange cavity (32) of the air distribution sleeve (3) with the air distribution hole (33).; 2. The three-stroke multi-station dual-purpose air energy engine according to claim 1, characterized in that: The first piston (5) is connected to the first slider (51). A first guide rod (54) is connected to the first cylinder block (50). The first slider (51) is slidably disposed on the first guide rod (54). The first slider (51) is drivingly connected to the first swing arm (7) through a first swing arm inner rod (52). One end of the first swing arm inner rod (52) is hinged to the first slider (51). One end of the first swing arm (7) has a first movable hole, and the other end of the first swing arm inner rod (52) is located in the first movable hole of the first swing arm (7). The second piston (4) is connected to the second slider (44). A second guide rod (41) is connected to the second cylinder block (40). The second slider (44) is slidably disposed on the second guide rod (41). The second slider (44) is drivingly connected to the first swing arm (7) through a second swing arm inner rod (42). One end of the second swing arm inner rod (42) is hinged to the second slider (44). The other end of the first swing arm (7) has a second movable hole, and the other end of the second swing arm inner rod (42) is located in the second movable hole of the first swing arm (7).

3. The three-stroke multi-station dual-purpose air energy engine according to claim 2, characterized in that: The third piston (6) is connected to the third slider (61). A third guide rod (64) is connected to the third cylinder block (60). The third slider (61) is slidably disposed on the third guide rod (64). The third slider (61) is drivingly connected to the second swing arm (8) through a third swing arm inner rod (62). One end of the third swing arm inner rod (62) is hinged to the third slider (61). One end of the second swing arm (8) has a third movable hole, and the other end of the third swing arm inner rod (62) is located in the third movable hole of the second swing arm (8). The second slider (44) is drivingly connected to the second swing arm (8) through a fourth swing arm inner rod (43). One end of the fourth swing arm inner rod (43) is hinged to the second slider (44). The other end of the second swing arm (8) has a fourth movable hole, and the other end of the fourth swing arm inner rod (43) is located in the fourth movable hole of the second swing arm (8).

4. The three-stroke multi-station dual-purpose air energy engine according to claim 3, characterized in that: The first slider (51) has a first guide groove (510), and the first guide rod (54) is slidably disposed in the first guide groove (510). The second slider (44) has a second guide groove, and the second guide rod (41) is slidably disposed in the second guide groove. The third slider (61) has a third guide groove, and the third guide rod (64) is slidably disposed in the third guide groove.

5. The three-stroke multi-station dual-purpose air energy engine according to claim 1, characterized in that: Circular sealing grooves are provided on the contact surfaces of the first piston (5), the second piston (4), and the third piston (6), and engineering plastic rings (18) are provided in the circular sealing grooves.

6. The three-stroke multi-station dual-purpose air energy engine according to claim 4, characterized in that: Fluororubber rings (19) are provided in the circular sealing grooves, and the engineering plastic rings (18) are located outside the fluororubber rings (19).

7. The three-stroke multi-station dual-purpose air energy engine according to claim 1, characterized in that: An intake check valve (200) is connected to the first vent hole (20), and an exhaust check valve (210) is connected to the second vent hole (21).

8. The three-stroke multi-station dual-purpose air energy engine according to claim 3, wherein: Vent holes (71) are provided on both the first swing arm (7) and the second swing arm (8), and the vent holes (71) communicate the movable holes with the outside.

9. The three-stroke multi-station dual-purpose air energy engine according to claim 1, characterized in that: A first eccentric wheel (15) is connected to the output shaft (1), a first connecting rod (55) is hinged to the first eccentric wheel (15), a second eccentric wheel (16) is connected to the output shaft (1), and a first connecting rod (65) is hinged to the second eccentric wheel (16); a counterweight (17) is connected to the output shaft (1), and the center of gravity of the counterweight (17) is symmetrical with respect to the axis of the output shaft (1) to the centers of gravity of the first eccentric wheel (15) and the second eccentric wheel (16).

10. The three-stroke multi-station dual-purpose air energy engine according to claim 1, characterized in that: End covers (47) are connected to the ends of the first piston, the second piston, and the third piston by bolts. The outer ends of the end covers (47) have pressing surfaces (470). Steps (46) are provided at the ends of the first piston, the second piston, and the third piston. The pressing surfaces (470) of the end covers (47) press the engineering plastic rings (18) against the steps (46) of the pistons.

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