A double starting torque actuator with reset damping buffer function

Abstract

The present invention belongs to the technical field of cylinders, and particularly relates to a double starting torque actuator with a reset damping buffering function, comprising a cylinder module, wherein the cylinder module comprises a lower cylinder head, an upper cylinder head and an intermediate cylinder head, wherein the intermediate cylinder head is arranged between the upper cylinder head and the lower cylinder head, and the cylinder is connected to the outside by means of an adjusting air valve, a buffer spring, the cooperation between a main piston and an auxiliary piston, thereby ensuring double starting torque when a push rod performs the first 15% stroke, and since the adjusting air valve is opened, the pressure difference between the main cylinder and the auxiliary cylinder disappears, thereby eliminating the unbalanced force during startup, and the actuator restores a normal torque state, thereby ensuring the normal opening and use of the valve, and improving the use efficiency of the cylinder, and when resetting, under the action of the buffer spring and the adjusting air valve, the main piston and the auxiliary piston are quickly reset, and it is convenient to adjust the gas discharge speed in the lower cylinder head, thereby achieving a buffering effect.

Description

Technical Field

[0001] The invention belongs to the technical field of cylinders, and in particular relates to a double starting torque actuator with a reset damping buffer function. Background Art

[0002] The function of the cylinder is to convert the pressure energy of compressed air into mechanical energy, driving the mechanism to perform linear reciprocating motion, swinging or rotating motion. The single-acting cylinder has a simple structure and consumes less gas. A spring is installed in the cylinder body to shorten the effective stroke of the cylinder. The spring has the ability to absorb kinetic energy and can reduce the impact effect at the end of the stroke. When selecting a cylinder, the thrust and pull on the piston rod should be determined according to the size of the force required for the work. Therefore, when selecting a cylinder, the output force of the cylinder should have a slight margin.

[0003] In the prior art, the Chinese invention with application number: CN201711319414.0 discloses a high-efficiency cut-off single-acting pneumatic actuator, including a cylinder module, a spring cylinder module, an air control module and a hydraulic cylinder module. The cylinder module includes a cylinder, a bracket, a push rod, a guide mechanism and a buffer mechanism; the spring cylinder module includes a spring cylinder, a retaining ring pressure cover, a spring retaining ring, a spring seat, an inner spring, an outer spring and a spring cylinder cover. The bottom surface of the spring cylinder is fixedly connected to the upper cylinder cover of the cylinder module, and the upper end of the push rod passes through the center hole of the bottom surface of the spring cylinder and extends into the spring cylinder; the hydraulic cylinder module includes a hydraulic cylinder, an oil pressure pipeline, a hydraulic oil pump and a hydraulic manual stop valve. The hydraulic cylinder is fixedly mounted on the spring cylinder cover of the spring cylinder module, and the hydraulic rod of the hydraulic cylinder extends into the spring cylinder. The beneficial effects are: the switching action is stable and smooth; the buffer structure can protect the sealing surface of the valve; the hydraulic cylinder module is small in size and light in weight; the spring cylinder module is easy to install, convenient to repair and replace, safe to use and repair, and avoids spring rust from falling into the cylinder; it has a long service life;

[0004] The starting force torque stroke of the actuator in the existing technical solution is relatively long, and the piston rod needs to travel a certain distance to be converted into mechanical energy, which reduces the efficiency of the cylinder. In addition, the air flow rate of air in and out of the cylinder during use can directly affect the reset effect of the piston, so the reset stability of the piston needs to be further improved. Therefore, we need to propose a double starting torque actuator with a reset damping buffer function. Summary of the invention

[0005] In view of the above problems, the present invention provides a double starting torque actuator with a reset damping buffering function, including a cylinder module, the cylinder module including a lower cylinder head, an upper cylinder head and an intermediate cylinder head, the intermediate cylinder head is arranged between the upper cylinder head and the lower cylinder head, an auxiliary cylinder is arranged between the lower cylinder head and the intermediate cylinder head, a main cylinder is arranged between the upper cylinder head and the intermediate cylinder head, a main piston is slidably connected to the inner cavity of the main cylinder, an auxiliary piston is slidably connected to the inner cavity of the auxiliary cylinder, a push rod is arranged through the lower cylinder head and the intermediate cylinder head, a buffer plunger and a fixed plunger are fixedly connected to the outer side of the push rod, a plurality of groups of buffer springs are arranged on one side of the main piston, a throttling air hole is opened on one side of the lower cylinder head, one end of the throttling air hole is connected to a connecting air pipe, one end of the connecting air pipe is connected to a regulating air valve, a plurality of groups of support columns are detachably connected to the lower surface of the lower cylinder head, one end of the plurality of support columns is fixedly connected to a support plate for installing the regulating air valve, and an exhaust pipe for buffering air pressure is arranged on the regulating air valve.

[0006] Furthermore, the regulating air valve includes a valve body, a driving member and two groups of regulating members. The inner cavity of the valve body is provided with a special-shaped exhaust cavity for air circulation, and the exhaust cavity is connected with a connecting cavity slidably arranged with the two groups of regulating members.

[0007] Furthermore, the driving member includes a motor and a gear of a rotating shaft, the motor is mounted on the upper surface of the valve body, the rotating shaft is rotatably connected in the connecting cavity and passes through the valve body and is driven by the motor, and the gear is fixedly connected to the middle part of the outer side of the rotating shaft.

[0008] Furthermore, the two groups of adjusting parts are arranged in point symmetry, and the adjusting parts include a tooth plate meshing with the gear, one side of the tooth plate is fixedly connected with a sealing plug for sealing the special-shaped cavity, and the tooth plate and the sealing plug are fixedly connected with two groups of limit blocks on the opposite side.

[0009] Furthermore, a second exhaust hole for connecting to an exhaust pipe is provided on one side of the valve body, and a first exhaust hole for connecting to an exhaust pipe is provided on an upper surface of the valve body.

[0010] Furthermore, the main piston is installed in the middle of the outer side of the push rod, the main piston is arranged between the buffer plunger and the limit plunger, and the auxiliary piston is arranged on the outer side of one end of the buffer plunger away from the limit plunger.

[0011] Furthermore, the inner diameter of the main cylinder is the same as the inner diameter of the auxiliary cylinder, the outer diameter of the main piston is the same as the outer diameter of the auxiliary piston, and sealing rings are provided on the outer sides of the main piston and the auxiliary piston.

[0012] Furthermore, a plurality of groups of spring seats are fixedly connected to the side of the main piston opposite to the intermediate cylinder cover, a fixing bolt bolted to the main piston is inserted on one side of the plurality of groups of spring seats, and the plurality of groups of spring seats are arranged at equal angles.

[0013] Furthermore, a constant pressure air hole for balancing the air pressure is provided on the upper surface of the upper cylinder cover, a main air hole is provided on the lower surface of the lower cylinder cover, and a buffer chamber for inserting a buffer plunger is provided on the upper surface of the lower cylinder cover.

[0014] Furthermore, a plurality of connecting rods are fixedly connected to the upper surface of the lower cylinder cover, one end of each of the connecting rods passes through the upper cylinder cover and is threadedly connected with a locking nut, and an annular gasket is provided between the locking nut and the upper cylinder cover.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention adjusts the coordination among the air valve, the buffer spring, the main piston and the auxiliary piston, and utilizes the regulating air valve to connect the air cylinder with the outside world, thereby ensuring double starting torque when the push rod performs the first 15% stroke, and because the regulating air valve is opened, the pressure difference between the main cylinder barrel and the auxiliary cylinder barrel disappears, so that the unbalanced force at the time of starting disappears, and the actuator recovers the normal torque state, thereby ensuring the normal opening and use of the valve, and improving the use efficiency of the air cylinder. When resetting, the main piston and the auxiliary piston are quickly reset under the action of the buffer spring and the regulating air valve, and it is convenient to adjust the gas discharge speed in the lower cylinder head, thereby realizing the buffering effect.

[0017] 2. The present invention achieves overall installation of the cylinder module by coordinating the middle cylinder head, the upper cylinder head, the lower cylinder head and the connecting rod, superimposing the lower cylinder head, the auxiliary cylinder barrel, the middle cylinder head, the main cylinder barrel and the upper cylinder head at one time, and making the connecting rod pass through the upper cylinder head and be threadedly connected with the locking bolt, thereby improving the stability of the installation, facilitating later maintenance and disassembly, and improving maintenance efficiency.

[0018] 3. In the present invention, the buffer spring, spring seat, lower cylinder cover and buffer plunger cooperate with each other. The air compressed in the first 85% stroke of the buffer spring is discharged from the main air hole, and the air in the last 15% stroke enters the buffer chamber of the lower cylinder cover under the action of the buffer plunger, and passes into the regulating air valve through the throttling air hole, thereby utilizing the regulating air valve to slow down the movement speed of the piston.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a bottom-up structure according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of a top view structure according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram showing the internal structure of the main cylinder and the auxiliary cylinder according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of a buffer spring according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of a push rod structure according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of the structure of a lower cylinder cover according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic diagram of the structure of a regulating gas valve according to an embodiment of the present invention is shown;

[0028] Figure 8 Shows Figure 7 The enlarged structural diagram at A in the middle;

[0029] Fig. 9 A schematic diagram of the horizontal cross-section structure of a regulating air valve according to an embodiment of the present invention is shown.

[0030] In the figure: 1. lower cylinder head; 2. upper cylinder head; 3. middle cylinder head; 4. main cylinder barrel; 5. auxiliary cylinder barrel; 6. connecting rod; 7. gasket; 8. locking nut; 9. push rod; 10. main air hole; 11. throttling air hole; 12. auxiliary piston; 13. main piston; 14. spring seat; 15. fixing bolt; 16. buffer spring; 17. buffer plunger; 18. limit plunger; 19. constant pressure air hole; 20. support column; 21. support plate; 22. regulating air valve; 221. valve body; 222. motor; 223. rotating shaft; 224. gear; 225. first exhaust hole; 226. exhaust chamber; 227. second exhaust hole; 228. connecting chamber; 229. adjusting member; 2291. tooth plate; 2292. sealing plug; 2293. limit block; 23. connecting air pipe; 24. exhaust pipe. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The embodiment of the present invention provides a double starting torque actuator with a reset damping buffer function, such as Figure 1-9 As shown, it includes a cylinder module, which includes a lower cylinder head 1, an upper cylinder head 2 and an intermediate cylinder head 3. The intermediate cylinder head 3 is arranged between the upper cylinder head 2 and the lower cylinder head 1, an auxiliary cylinder 5 is arranged between the lower cylinder head 1 and the intermediate cylinder head 3, a main cylinder 4 is arranged between the upper cylinder head 2 and the intermediate cylinder head 3, a main piston 13 is slidably connected to the inner cavity of the main cylinder 4, an auxiliary piston 12 is slidably connected to the inner cavity of the auxiliary cylinder 5, a push rod 9 is arranged through the lower cylinder head 1 and the intermediate cylinder head 3, a buffer plunger 17 and a fixed plunger are fixedly connected to the outer side of the push rod 9, a plurality of buffer springs 16 are arranged on one side of the main piston 13, a throttling air hole 11 is opened on one side of the lower cylinder head 1, one end of the throttling air hole 11 is connected to a connecting air pipe 23, one end of the connecting air pipe 23 is connected to a regulating air valve 22, and the lower cylinder head 1 A plurality of support columns 20 are detachably connected to the lower surface, and one end of the plurality of support columns 20 is fixedly connected to a support plate 21 for installing an adjusting air valve 22. An exhaust pipe 24 for buffering air pressure is provided on the adjusting air valve 22. The push rod 9 is used to move the buffer plunger 17 and the limit plunger 18, so that the main piston 13 and the auxiliary piston 12 are moved synchronously, and the buffer spring 16 is compressed while compressing the space between the buffer spring 16 and the middle cylinder cover 3, so that the adjusting air valve 22 provides double starting torque in the first 15% stroke after opening. After opening, the front end of the valve is connected to the air at the rear end of the valve, the pressure difference disappears, and the unbalanced force disappears accordingly. At this moment, the actuator returns to the output normal torque state, ensuring that the valve can be smoothly and completely opened, achieving air connectivity, and improving the use effect.

[0033] When the buffer spring 16 is reset, the compressed air of the first 85% of the stroke is discharged from the main air hole on the lower cylinder head 1. At the last 15% of the stroke, the buffer plunger 17 begins to intervene and block the main air hole, so that the remaining compressed air can only be discharged from the throttle air hole. By adjusting the air valve, the exhaust speed can be well controlled to achieve a damping buffering effect.

[0034] The cylinder module also includes a booster cylinder, which is installed on the support plate and is used to adjust the position of the push rod, making the actuator movement smoother and bringing great convenience to the user.

[0035] In this embodiment, Figure 7-9 As shown, the regulating air valve 22 includes a valve body 221, a driving member and two groups of regulating members 229. The inner cavity of the valve body 221 is provided with a special-shaped exhaust chamber 226 for air circulation. The exhaust chamber 226 is connected to a connecting chamber 228 which is slidably arranged on the same level as the two groups of regulating members 229. The driving member is used to drive the two groups of regulating members 229 to move relative to each other, so that the regulating members 229 adjust the flow area of ​​the air flowing in the exhaust chamber 226, so as to control the exhaust volume of the regulating air valve 22, thereby slowing down the speed at which the buffer plunger 17 enters the buffer chamber of the lower cylinder head 1, thereby improving the buffer effect.

[0036] In a further preferred embodiment, Figure 8-9 As shown, the driving member includes a motor 222 and a gear 224 of a rotating shaft 223. The motor 222 is installed on the upper surface of the valve body 221. The rotating shaft 223 is rotatably connected in the connecting cavity 228 and passes through the valve body 221 and is driven by the motor 222. The gear 224 is fixedly connected to the middle part of the outer side of the rotating shaft 223. The motor 222 drives the rotating shaft 223 to rotate, and the rotating shaft 223 drives the gear 224 to rotate, so that the gear 224 can adjust the position of the adjusting member 229, thereby improving the stability of the movement of the adjusting member 229 and ensuring the linkage effect. At the same time, the rotating shaft 223 is rotatably connected in the connecting cavity 228, thereby improving the stability of the axial rotation of the gear 224.

[0037] Further, such as Figure 8-9 As shown, the two groups of adjusting members 229 are point-symmetrically arranged, and the adjusting member 229 includes a tooth plate 2291 meshing with the gear 224, and a sealing plug 2292 for sealing the special-shaped cavity is fixedly connected to one side of the tooth plate 2291, and two groups of limit blocks 2293 are fixedly connected to the tooth plate 2291 and the sealing plug 2292 on the opposite side, which are meshed with the tooth grooves on the tooth plate 2291 through the rotation of the gear 224. The forward and reverse rotation of the gear 224 facilitates the adjustment of the position of the tooth plate 2291 of the two groups of adjusting members 229, so that the tooth plate 2291 moves the position of the sealing plug 2292, so that the sealing plug 2292 can adjust the ventilation area of ​​the exhaust cavity 226 for blocking. The change of the ventilation area facilitates the reset buffering of the piston. Through different ventilation cross-sections, the exhaust speed can be better controlled, thereby achieving the damping buffering effect.

[0038] Preferably, Figure 8-9As shown, a second exhaust hole 227 for connecting to the exhaust pipe 24 is opened on one side of the valve body 221, and a first exhaust hole 225 for connecting to the connecting air pipe 23 is opened on the upper surface of the valve body 221. The valve body 221 is conveniently connected to the connecting air pipe 23 through the first exhaust hole 225, so that the buffer plunger 17 is inserted into the lower cylinder head 1 to compress the space in the lower cylinder head 1, so that the air passes through the throttling hole 11 and enters the valve body 221 via the connecting air pipe 23, thereby realizing the discharge of air, and the size of the air circulation area is used to adjust the air circulation speed, thereby improving the buffering effect on the reset of the auxiliary piston 12.

[0039] In this embodiment, if Figure 4-5 As shown, the main piston 13 is installed in the middle part of the outer side of the push rod 9, the main piston 13 is arranged between the buffer plunger 17 and the limit plunger 18, and the auxiliary piston 12 is arranged on the outer side of the end of the buffer plunger 17 away from the limit plunger 18. The main piston 13 squeezes multiple groups of buffer springs 16 under the pushing action of the push rod 9, and the multiple groups of buffer springs 16 are arranged at equal angles to slow down the buffering effect on the main piston 13, thereby improving the movement stability of the main piston 13. A through hole for the sliding insertion of the buffer plunger 17 is opened in the middle part of one side of the intermediate cylinder cover 3, so that the push rod 9 can drive the main piston 13 and the auxiliary piston 12 to move synchronously, thereby realizing the double starting torque of the cylinder.

[0040] In a preferred embodiment, Figure 3-4 As shown, the inner diameter of the main cylinder 4 is the same as the inner diameter of the auxiliary cylinder 5, the outer diameter of the main piston 13 is the same as the outer diameter of the auxiliary piston 12, and the outer sides of the main piston 13 and the auxiliary piston 12 are both provided with sealing rings. The lower surface of the upper cylinder cover 2 is fixedly connected with an upper sealing connecting ring that is sealed with the main cylinder 4, and the upper surface of the lower cylinder cover 1 is fixedly connected with a lower sealing connecting ring that is sealed with the lower cylinder, and intermediate sealing connecting rings are respectively provided on both sides of the intermediate cylinder cover 3 for sealing the main cylinder 4 and the auxiliary cylinder 5. The overall sealing of the cylinder is high, which improves the efficiency of starting torque conversion and the thrust of kinetic energy output.

[0041] like Figure 3-4 In the embodiment, a plurality of spring seats 14 are fixedly connected to the side of the main piston 13 opposite to the intermediate cylinder cover 3, and a fixing bolt 15 bolted to the main piston 13 is inserted on one side of the plurality of spring seats 14. The plurality of spring seats 14 are arranged at equal angles, and a buffer spring 16 is installed through the spring seat 14 to improve the stability of the installation of the buffer spring 16. After the spring seat 14 and the buffer spring 16 are installed, the overall structure is a damping structure to realize the damper effect, which is used to reset the position of the main piston 13 and improve the efficiency of resetting the main piston 13.

[0042] like Figure 1-2In the embodiment, a constant pressure air hole 19 for balancing the air pressure is provided on the upper surface of the upper cylinder head 2, a main air hole 10 is provided on the lower surface of the lower cylinder head 1, and a buffer chamber for inserting a buffer plunger 17 is provided on the upper surface of the lower cylinder head 1. The constant pressure air hole 19 is used to balance the pressure of the main air chamber and the outside of the cylinder when the push rod 9 pushes the main piston 13 to squeeze the main air chamber formed by the upper cylinder head 2 and the main cylinder barrel 4, thereby reducing the resistance of the push rod 9 and improving the pushing efficiency of the push rod 9. At the same time, under the action of the elastic potential energy of the spring return, the auxiliary piston 12 can discharge the air in the auxiliary cylinder barrel 5 through the main air hole 10, and after the buffer plunger 17 is embedded in the lower cylinder head 1, the remaining gas is discharged through the throttling air hole 11. At the same time, the regulating valve 22 is used to adjust the gas discharge efficiency, thereby controlling the size of the exhaust volume and realizing the buffering within the last 15% of the stroke. The buffer chamber of the lower cylinder head 1 is as shown in FIG. Figure 7 shown.

[0043] like Figure 1-2 In the embodiment, a plurality of connecting rods 6 are fixedly connected to the upper surface of the lower cylinder head 1, one end of each of the plurality of connecting rods 6 passes through the upper cylinder head 2 and is threadedly connected with a locking nut 8, an annular gasket 7 is arranged between the locking nut 8 and the upper cylinder head 2, the upper cylinder head 2 is connected to the lower cylinder head 1 by the plurality of connecting rods 6, and the main cylinder barrel 4 and the auxiliary cylinder barrel 5 are pressed on both sides of the middle cylinder head 3, thereby improving the stability of the overall installation under the action of the locking nut 8, and at the same time, the connecting rods 6 can protect the main cylinder barrel 4 and the auxiliary cylinder barrel 5 to avoid direct damage to the main cylinder barrel 4 and the auxiliary cylinder barrel 5 by collision, thereby improving the service life of the cylinder body.

[0044] When in use, the motor 222 drives the rotating shaft 223 to drive the gear 224 to rotate. During the rotation of the gear 224, the gear 224 meshes with the teeth on the tooth plate 2291, so that the two sets of tooth plates 2291 are relatively close to each other, and then the sealing plug 2292 pushes the inner wall of the exhaust chamber 226, so that the valve body 221 connects the first exhaust hole 225 with the second exhaust hole 227 through the connecting chamber 228, and the push rod 9 pushes the limit plunger 18 and the buffer plunger 17 to move synchronously, and the middle part of the push rod 9 drives the main piston 13 in the main cylinder The auxiliary piston 12 slides and displaces in the auxiliary cylinder 4, and the buffer plunger 17 drives the auxiliary piston 12 to slide and displace in the auxiliary cylinder 5. The air in the main cylinder 4 is discharged through the constant pressure air hole 19. At the same time, the main piston 13 compresses the multiple groups of buffer springs 16 to increase the elastic potential energy. The auxiliary piston 12 compresses the air in the auxiliary cylinder 5 to realize the synchronous upward movement of the main piston 13 and the auxiliary piston 12. The main piston 13 moves until the limit plunger 18 hits the upper cylinder cover 2. The stroke of the main piston 13 reaches the end point, and the stroke of the auxiliary piston 12 ends.

[0045] During resetting, the elastic potential energy of the multiple groups of buffer springs 16 is released, and the multiple groups of buffer springs 16 push the main piston 13 to move downward, thereby causing the auxiliary piston 12 to discharge the air in the auxiliary cylinder 5 through the main air hole 10. When the main piston 13 drives the auxiliary piston 12 downward to the provided buffer plunger 17 and enters the buffer chamber of the lower cylinder head 1 (not shown in the figure), the air in the auxiliary chamber of the auxiliary cylinder 5 continues to be discharged from the main air hole 10, and the air in the buffer chamber enters the connecting air pipe 23 through the throttling air hole 11 and passes into the exhaust chamber 226 of the valve body 221. By adjusting the area of ​​gas circulation by adjusting the air valve 22, the exhaust volume is controlled, and the movement speed of the main piston 13 is slowed down, thereby realizing the buffering function.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double starting torque actuator with reset damping buffer function, comprising a cylinder module, characterized in that: The cylinder module comprises a lower cylinder head (1), an upper cylinder head (2) and an intermediate cylinder head (3); the intermediate cylinder head (3) is arranged between the upper cylinder head (2) and the lower cylinder head (1); an auxiliary cylinder (5) is arranged between the lower cylinder head (1) and the intermediate cylinder head (3); a main cylinder (4) is arranged between the upper cylinder head (2) and the intermediate cylinder head (3); a main piston (13) is slidably connected to the inner cavity of the main cylinder (4); an auxiliary piston (12) is slidably connected to the inner cavity of the auxiliary cylinder (5); a push rod (9) is arranged between the lower cylinder head (1) and the intermediate cylinder head (3); a buffer column is fixedly connected to the outer side of the push rod (9) A plurality of buffer springs (16) are arranged on one side of the main piston (13); a throttling air hole (11) is opened on one side of the lower cylinder cover (1); one end of the throttling air hole (11) is connected to a connecting air pipe (23); one end of the connecting air pipe (23) is connected to a regulating air valve (22); a plurality of support columns (20) are detachably connected to the lower surface of the lower cylinder cover (1); one end of the plurality of support columns (20) is fixedly connected to a support plate (21) for mounting the regulating air valve (22); an exhaust pipe (24) for buffering air pressure is arranged on the regulating air valve (22); The regulating air valve (22) comprises a valve body (221), a driving member and two groups of regulating members (229); the inner cavity of the valve body (221) is provided with a special-shaped exhaust cavity (226) for air circulation; the exhaust cavity (226) is connected to a connecting cavity (228) slidably arranged on the two groups of regulating members (229); The driving member comprises a motor (222) and a gear (224) of a rotating shaft (223); the motor (222) is mounted on the upper surface of the valve body (221); the rotating shaft (223) is rotatably connected in the connecting cavity (228) and penetrates the valve body (221) and is driven by the motor (222); the gear (224) is fixedly connected to the middle portion of the outer side of the rotating shaft (223); The two groups of adjusting members (229) are arranged in a point-symmetrical manner, and the adjusting members (229) include a tooth plate (2291) meshing with the gear (224), one side of the tooth plate (2291) is fixedly connected with a sealing plug (2292) for blocking the special-shaped cavity, and the side of the tooth plate (2291) opposite to the sealing plug (2292) is fixedly connected with two groups of limit blocks (2293); A second exhaust hole (227) for connecting to an exhaust pipe (24) is provided on one side of the valve body (221), and a first exhaust hole (225) for connecting to an exhaust pipe (23) is provided on the upper surface of the valve body (221); The upper surface of the upper cylinder cover (2) is provided with a constant pressure air hole (19) for balancing the air pressure, the lower surface of the lower cylinder cover (1) is provided with a main air hole (10), and the upper surface of the lower cylinder cover (1) is provided with a buffer chamber for inserting a buffer plunger (17).

2. A double starting torque actuator with reset damping buffer function according to claim 1, characterized in that: The main piston (13) is installed in the middle of the outer side of the push rod (9), the main piston (13) is arranged between the buffer plunger (17) and the limit plunger (18), and the auxiliary piston (12) is arranged on the outer side of one end of the buffer plunger (17) away from the limit plunger (18).

3. A double starting torque actuator with reset damping buffer function according to claim 1, characterized in that: The inner diameter of the main cylinder (4) is the same as the inner diameter of the auxiliary cylinder (5), the outer diameter of the main piston (13) is the same as the outer diameter of the auxiliary piston (12), and sealing rings are provided on the outer sides of the main piston (13) and the auxiliary piston (12).

4. A double starting torque actuator with reset damping buffering function according to claim 3, characterized in that: A plurality of groups of spring seats (14) are fixedly connected to the side of the main piston (13) opposite to the intermediate cylinder cover (3), and a fixing bolt (15) bolted to the main piston (13) is inserted on one side of the plurality of groups of spring seats (14), and the plurality of groups of spring seats (14) are arranged at equal angles.

5. A double starting torque actuator with reset damping buffer function according to claim 4, characterized in that: A plurality of connecting rods (6) are fixedly connected to the upper surface of the lower cylinder cover (1), one end of each of the connecting rods (6) passes through the upper cylinder cover (2) and is threadedly connected to a locking nut (8), and an annular gasket (7) is provided between the locking nut (8) and the upper cylinder cover (2).

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