An air damper

Abstract

The present invention discloses an air damper, which includes an outer cylinder. A top ring is provided at the top inside the outer cylinder, and a bottom plate is provided at the bottom inside the outer cylinder. A circular inclined surface is provided at the bottom of the bottom plate. When the exhaust cylinder is pushed to move in the present invention, at this time, the exhaust cylinder pushes the piston to move downward on the surfaces of a plurality of support rods. During the process of the piston moving downward inside the outer cylinder, it cooperates with the bottom plate to squeeze the air inside the outer cylinder. The air inside the outer cylinder is discharged from the exhaust port of the exhaust cylinder during the downward movement of the piston, thereby forming a moving damping effect. Until the top of the retaining cylinder enters the bottom of the exhaust port, at this time, the retaining cylinder can block the exhaust port, and the air inside the outer cylinder enters the exhaust port through the gap between the retaining cylinder and the exhaust cylinder, and finally is discharged from the outer cylinder through the top of the exhaust port, further improving the damping effect of the entire air damper and preventing the sudden movement of the piston from causing the piston to move rapidly inside the outer cylinder.

Description

Technical Field

[0001] The present invention belongs to the technical field of dampers, and particularly relates to an air damper. Background Art

[0002] An air damper is also called an air damping shock absorber. It is widely used in automotive audio, CD, VCD, in-vehicle DVD, radio cassette player door opening and closing, in-vehicle ashtray, in-vehicle cup holder, automotive handle armrest, in-vehicle storage box, sundry box and other household appliances to reduce the damage of mechanical vibration to items.

[0003] There are certain drawbacks in the use of existing air dampers. At present, when an external force is suddenly applied instantaneously, the moving speed of the piston will change greatly, resulting in uneven moving speed of the piston.

[0004] Therefore, it is very necessary to invent an air damper to solve the above problems. Summary of the Invention

[0005] In view of the above problems, the present invention provides an air damper to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: an air damper, including an outer cylinder, a top ring is arranged at the inner top of the outer cylinder, a bottom plate is arranged at the inner bottom of the outer cylinder, a circular inclined surface is arranged at the bottom of the bottom plate, the inclination direction of the circular inclined surface gradually deviates towards the center of the bottom plate from top to bottom, and a through port corresponding to the circular inclined surface is arranged at the bottom of the outer cylinder, and the diameter of the through port at the bottom of the outer cylinder is smaller than the diameter of the bottom plate. Screws are arranged around the bottom surface of the outer cylinder, and the outer cylinder is fixedly connected to the bottom plate by a plurality of screws. The bottom surface of the top ring is fixedly connected to the bottom plate by four support rods, and the four support rods are annularly and equidistantly located at the four positions of the bottom plate. A piston is arranged between the top ring and the bottom plate, and the support rods penetrate through the piston. The circumferential outer side surface of the piston is correspondingly attached to the circumferential inner side wall of the outer cylinder. A blocking cylinder is arranged at the center of the top surface of the bottom plate, and an exhaust cylinder corresponding to and matching the blocking cylinder is arranged at the center of the top surface of the piston, and an exhaust port is arranged at the center of the exhaust cylinder. The top of the blocking cylinder is correspondingly arranged with the bottom opening of the exhaust port, and the outer diameter of the blocking cylinder is smaller than the diameter of the exhaust port.

[0007] Further, a top cover is arranged at the top of the outer cylinder, a circular clamping strip is arranged at the bottom of the top cover, a circular groove for rotational cooperation with the circular clamping strip is arranged on the top surface of the top ring, and the circumferential outer side surface bottom of the top cover is spirally sleeved on the top of the circumferential outer side surface of the outer cylinder by the rotational cooperation of the circular clamping strip and the circular groove.

[0008] Furthermore, slide grooves are provided on both sides of the inner wall of the exhaust port of the exhaust pipe, a vertical rod is provided inside the slide groove, a filter plate is provided inside the exhaust port, the circumferential outer side surface of the filter plate is fitted with the inner wall of the exhaust port, and the circumferential outer side surface of the filter plate is provided with a convex plate corresponding to the slide groove, the vertical rod passes through the convex plate, and a first spring is provided on the top of the convex plate, and the first spring is sleeved on the surface of the vertical rod, and a plurality of vertical air ports are arranged in parallel in an annular manner with equal distances on the surface of the filter plate, and the top opening and the bottom opening of the exhaust port are correspondingly connected by the plurality of air ports.

[0009] Furthermore, a first movable groove is provided inside the retaining cylinder, two movable plates are provided inside the first movable groove, and the two movable plates are arranged opposite to each other. Semicircular retaining plates are fixedly connected to the tops of the two movable plates, and the two retaining plates are arranged corresponding to the multiple air ports on the surface of the filter plate.

[0010] Furthermore, the bottom of the two baffles are respectively fixedly connected with a slide, the slide is inside the bottom plate, and a second movable groove corresponding to the slide is provided inside the bottom plate. The center of the outer side surface of the slide is fixedly connected to the inner wall of the second movable groove through an elastic strip, and the inner sides of the two slides fit each other. The two slides respectively use two movable plates to make the two baffles fit each other, and the diameter of the circular plate formed by the two baffles is the same as the outer diameter of the baffle cylinder.

[0011] Furthermore, grooves are provided on both sides of the top of the bottom plate, and the bottom of the grooves is correspondingly connected to the second movable grooves, and the top of the slide passes through the grooves, and the top of the slide is at the top of the top surface of the bottom plate, and the slide slides in sliding cooperation with the grooves.

[0012] Furthermore, a movable frame is movably sleeved on the surface of the support rods on both sides, a first connecting frame is provided at both ends of the inner side of the movable frame, and a second connecting frame is provided on both sides of the top surface of the slide frame, the two movable frames are cross-arranged to correspond to the two slide frames, and the first connecting frame and the second connecting frame are rotatably connected by a rotating plate, and the two adjacent corresponding rotating plates are staggered.

[0013] Furthermore, the outer circumferential surface and the annular inclined surface of the piston are both adhered with rubber sleeves, and the piston and the annular inclined surface are respectively matched with the inner circumferential wall of the outer cylinder and the bottom through hole of the outer cylinder by the rubber sleeves.

[0014] Furthermore, a second spring is sleeved on the surfaces of the front and rear support rods, the top end of the second spring is fixedly connected to the bottom surface of the piston, and the bottom end of the second spring is fixedly connected to the top surface of the bottom plate.

[0015] Technical effects and advantages of the present invention:

[0016] 1. When the exhaust pipe is pushed to move in the present invention, the exhaust pipe pushes the piston to move downward on the surfaces of multiple support rods at this time. During the process of the piston moving downward inside the outer cylinder, it cooperates with the bottom plate to squeeze the air inside the outer cylinder. The air inside the outer cylinder is discharged from the exhaust port of the exhaust pipe during the downward movement of the piston, thereby forming a moving damping effect. Until the top of the baffle cylinder enters the bottom of the exhaust port, the baffle cylinder can block the exhaust port at this time. The air inside the outer cylinder enters the exhaust port through the gap between the baffle cylinder and the exhaust pipe, and finally is discharged from the outer cylinder through the top of the exhaust port, further improving the damping effect of the entire air damper and preventing the piston from moving suddenly and quickly inside the outer cylinder due to the sudden movement of the piston.

[0017] 2. By rotating the top cover in the present invention, the top cover rotates inside the annular groove of the top ring by using the annular clamping strip, and due to the spiral effect between the top cover and the top of the outer cylinder, the top cover can be firmly placed on the top of the outer cylinder. The top cover uses the annular clamping strip to push the top ring to move downward inside the outer cylinder, and the top ring uses multiple support rods to push the bottom plate to move downward, strengthening the sealing performance of the corresponding snap connection between the annular inclined surface at the bottom of the bottom plate and the through port at the bottom of the outer cylinder. And the outer cylinder and the bottom plate are fixedly connected by a screw rod. During the process of the screw rod limiting the outer cylinder and the bottom plate, the annular inclined surface moves downward inside the through port of the outer cylinder at this time. By using the spiral limit between the screw rod and the bottom plate, the connection sealing performance between the bottom plate and the outer cylinder is improved, avoiding air leakage at the through port at the bottom of the outer cylinder. At the same time, the corresponding limit between the annular inclined surface and the through port of the outer cylinder, and the extrusion limit of the top ring by the top cover using the annular clamping strip can prevent the top ring, support rods and bottom plate from rotating inside the outer cylinder, ensuring the stability of the components inside the outer cylinder.

[0018] 3. When the piston 7 moves downward inside the outer cylinder 1 in the present invention, the bottom of the exhaust port 10 gradually approaches the top of the baffle cylinder 8 at this time. Until the top end of the baffle cylinder 8 enters the exhaust port 10, the baffle cylinder 8 and the exhaust port 10 cooperate to limit the discharge of the air inside the outer cylinder 1 again, further improving the damping effect of the entire air damper, achieving the initial balanced damping effect of the outer cylinder 1. Until the top of the baffle 21 contacts the bottom of the filter plate 16, the baffle cylinder 8 uses the baffle 21 to limit the position of the filter plate 16. When the piston 7 continues to move downward, that is, the filter plate 16 moves upward inside the exhaust port 10, the filter plate 16 squeezes the first spring 17. At this time, the air can only be discharged from the gap between the baffle cylinder 8 and the exhaust pipe 9, achieving a moderate balanced damping effect.

[0019] 4. After the bottom surface of the piston contacts the top surface of the moving frame, the piston drives the moving frame to move downward synchronously. When the moving frame moves downward, the moving frame uses the first connecting frames at both ends to lower the top end of the rotating plate. The rotating plate rotates and then pushes the sliding frame to slide inside the strip groove. Since two adjacent and corresponding rotating plates are staggeredly arranged, at this time, the two sliding frames are separated from each other under the push of the rotating plates. During the process of the sliding frame sliding inside the second moving groove, the elastic strip is extruded, and the sliding frame uses the movable plate to move the baffle. The two baffles are gradually separated during the movement of the movable plate. At this time, the top surface of the baffle gradually corresponds to the air port of the filter plate, and the air inside the outer cylinder cannot be discharged through the exhaust port. As the piston continues to move downward, the piston extrudes the air inside the outer cylinder, and the extrusion of the filter plate on the first spring and the extrusion of the elastic strip by the sliding frame make the pressure inside the outer cylinder gradually increase, and the damping effect inside the outer cylinder gradually increases. Until the pressure inside the outer cylinder is the same as the force applied to the exhaust cylinder, the piston can no longer be used to extrude the outer cylinder through the exhaust cylinder, greatly improving the damping effect of the entire air damper.

[0020] Other features and advantages of the present invention will be described in the following specification, and, in part, will become apparent from the specification or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Shows the overall structural schematic diagram of the air damper according to the embodiment of the present invention;

[0023] Figure 2 Shows the internal structural schematic diagram of the air damper according to the embodiment of the present invention;

[0024] Figure 3 Shows the cross-sectional structural schematic diagram of the bottom plate and the exhaust cylinder according to the embodiment of the present invention;

[0025] In the figure: 1. Outer cylinder; 2. Top ring; 3. Base plate; 4. Annular inclined surface; 5. Screw rod; 6. Support rod; 7. Piston; 8. Baffle cylinder; 9. Exhaust cylinder; 10. Exhaust port; 11. Top cover; 12. Annular clamping strip; 13. Annular groove; 14. Chute; 15. Vertical rod; 16. Filter plate; 17. First spring; 18. Air port; 19. First movable groove; 20. Movable plate; 21. Flap; 22. Slide carriage; 23. Second movable groove; 24. Elastic strip; 25. Strip groove; 26. Moving carriage; 27. First connecting frame; 28. Second connecting frame; 29. Rotating plate; 30. Second spring. Detailed implementation manner

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] The present invention provides an air damper, as Figure 1-2As shown in the figure, it includes an outer cylinder 1. At the top inside the outer cylinder 1, there is a top ring 2, and at the bottom inside the outer cylinder 1, there is a bottom plate 3. At the bottom of the bottom plate 3, there is an annular inclined surface 4. The inclination direction of the annular inclined surface 4 gradually deviates towards the center of the bottom plate 3 from top to bottom. And at the bottom of the outer cylinder 1, there is a through port corresponding to and cooperating with the annular inclined surface 4, and the diameter of the through port at the bottom of the outer cylinder 1 is smaller than the diameter of the bottom plate 3. Around the periphery of the bottom surface of the outer cylinder 1, there are screw rods 5, and the outer cylinder 1 is fixedly connected to the bottom plate 3 by a plurality of screw rods 5. The bottom surface of the top ring 2 is fixedly connected to the bottom plate 3 by four support rods 6. The four support rods 6 are annularly equidistant and are respectively located at four positions of the bottom plate 3. Between the top ring 2 and the bottom plate 3, there is a piston 7, and the support rods 6 penetrate through the piston 7. The circumferential outer side surface of the piston 7 is correspondingly attached to the circumferential inner side wall of the outer cylinder 1. At the center of the top surface of the bottom plate 3, there is a blocking cylinder 8, and at the center of the top surface of the piston 7, there is an exhaust cylinder 9 corresponding to and matching the blocking cylinder 8. And at the center of the exhaust cylinder 9, there is an exhaust port 10. The top of the blocking cylinder 8 is correspondingly arranged with the bottom opening of the exhaust port 10, and the outer diameter of the blocking cylinder 8 is smaller than the diameter of the exhaust port 10. When assembling the entire air damper, the bottom of the bottom plate 3 is corresponding to the top opening of the outer cylinder 1, and the piston 7, the bottom plate 3, and the top ring 2 are all placed inside the outer cylinder 1. At this time, the annular inclined surface 4 at the bottom of the bottom plate 3 can be correspondingly attached to the through port at the bottom of the outer cylinder 1. The outer cylinder 1 is fixedly connected to the bottom plate 3 by the screw rods 5. During the process of the screw rods 5 limiting the outer cylinder 1 and the bottom plate 3, at this time, the annular inclined surface 4 moves down inside the through port of the outer cylinder 1. By the spiral limitation of the screw rods 5 and the bottom plate 3, the connection sealing performance between the bottom plate 3 and the outer cylinder 1 is improved, and the situation of air leakage at the through port at the bottom of the outer cylinder 1 is avoided.

[0028] During the actual use process, when the exhaust cylinder 9 is pushed to move, at this time, the exhaust cylinder 9 pushes the piston 7 to move down on the surfaces of the multiple support rods 6. During the process of the piston 7 moving down inside the outer cylinder 1, it cooperates with the bottom plate 3 to squeeze the air inside the outer cylinder 1. The air inside the outer cylinder 1 is discharged from the exhaust port 10 of the exhaust cylinder 9 during the process of the piston 7 moving down, thereby forming a moving damping effect. Until the top of the blocking cylinder 8 enters the bottom of the exhaust port 10, at this time, the blocking cylinder 8 can block the exhaust port 10. The air inside the outer cylinder 1 enters the exhaust port 10 through the gap between the blocking cylinder 8 and the exhaust cylinder 9, and finally is discharged from the outer cylinder 1 through the top of the exhaust port 10, further improving the damping effect of the entire air damper.

[0029] During Figure 1 and Figure 2In it, a top cover 11 is provided at the top of the outer cylinder 1. An annular clamping strip 12 is provided at the bottom of the top cover 11. An annular groove 13 which is rotationally matched with the annular clamping strip 12 is provided on the top surface of the top ring 2. The bottom of the circumferential outer side surface of the top cover 11 is spirally sleeved on the top of the circumferential outer side surface of the outer cylinder 1 by the rotational cooperation of the annular clamping strip 12 and the annular groove 13. After the piston 7, the bottom plate 3 and the top ring 2 are placed inside the outer cylinder 1, the bottom of the top cover 11 is aligned with the top of the outer cylinder 1. The top cover 11 is rotated. The top cover 11 rotates inside the annular groove 13 of the top ring 2 by means of the annular clamping strip 12. And the spiral effect between the top cover 11 and the top of the outer cylinder 1 enables the top cover 11 to be firmly placed on the top of the outer cylinder 1. During the process that the inner bottom surface of the top cover 11 contacts the top edge of the outer cylinder 1, the top cover 11 pushes the top ring 2 to move downward inside the outer cylinder 1 by means of the annular clamping strip 12. The top ring 2 pushes the bottom plate 3 to move downward by means of a plurality of support rods 6, further strengthening the sealing performance of the annular inclined surface 4 at the bottom of the bottom plate 3 and the bottom through port of the outer cylinder 1 being buckled correspondingly. At the same time, the annular inclined surface 4 is correspondingly limited by the through port of the outer cylinder 1, and the extrusion limitation of the top ring 2 by the annular clamping strip 12 of the top cover 11 can prevent the top ring 2, the support rods 6 and the bottom plate 3 from rotating inside the outer cylinder 1, ensuring the stability of the components inside the outer cylinder 1. Rubber sleeves are pasted on the circumferential outer side surface of the piston 7 and the annular inclined surface 4. And the piston 7 and the annular inclined surface 4 are respectively in corresponding cooperation with the circumferential inner side wall of the outer cylinder 1 and the bottom through hole of the outer cylinder 1 by means of the rubber sleeves. The use of rubber strips can improve the sealing performance between the annular inclined surface 4 at the bottom of the bottom plate 3 and the bottom through port of the outer cylinder 1, and also improve the sealing performance between the circumferential outer side surface of the piston 7 and the inner side wall of the outer cylinder 1.

[0030] In Figure 1-Figure 3 it, sliding grooves 14 are provided on both sides of the inner wall of the exhaust port 10 of the exhaust cylinder 9. A vertical rod 15 is provided inside the sliding grooves 14. A filter plate 16 is provided inside the exhaust port 10. The circumferential outer side surface of the filter plate 16 is attached to the inner side wall of the exhaust port 10. And a convex plate corresponding to and matching the sliding grooves 14 is provided on the circumferential outer side surface of the filter plate 16. The vertical rod 15 penetrates through the convex plate. And a first spring 17 is provided at the top of the convex plate. And the first spring 17 is sleeved on the surface of the vertical rod 15. A plurality of vertical air ports 18 are provided on the surface of the filter plate 16 at equal intervals in the circumferential direction. And the top opening and the bottom opening of the exhaust port 10 are correspondingly communicated by means of a plurality of air ports 18. During the process that the air inside the outer cylinder 1 is discharged through the exhaust port 10, at this time, the air at the bottom of the exhaust port 10 will flow to the top of the exhaust port 10 through a plurality of air ports 18 on the surface of the filter plate 16. The filter plate 16 itself will generate a certain resistance to the flowing air inside the exhaust port 10, thereby improving the damping effect of the entire air damper. The flow of the air enables the filter plate 16 to move upward inside the exhaust port 10, and the filter plate 16 squeezes the first spring 17 on the surface of the vertical rod 15 until the elastic force of the first spring 17 is the same as the thrust of the air on the filter plate 16. At this time, the filter plate 16 stops moving.

[0031] InFigure 2 and Figure 3 In Figure 3 , a first movable groove 19 is provided inside the retaining cylinder 8. Two movable plates 20 are provided inside the first movable groove 19, and the two movable plates 20 are arranged oppositely. Semi-circular retaining pieces 21 are fixedly connected to the tops of the two movable plates 20, and the two retaining pieces 21 are arranged corresponding to a plurality of air ports 18 on the surface of the filter plate 16. When the piston 7 moves downward inside the outer cylinder 1, at this time, the bottom of the exhaust port 10 gradually approaches the top of the retaining cylinder 8. Until the top of the retaining cylinder 8 enters the exhaust port 10, at this time, the retaining cylinder 8 cooperates with the exhaust port 10 to further limit the air discharge inside the outer cylinder 1, further improving the damping effect of the entire air damper, achieving the initial balanced damping effect of the outer cylinder 1. Until the top of the retaining piece 21 contacts the bottom of the filter plate 16, the retaining cylinder 8 uses the retaining piece 21 to limit the position of the filter plate 16. When the piston 7 continues to move downward, that is, the filter plate 16 moves upward inside the exhaust port 10, and the filter plate 16 squeezes the first spring 17. At this time, air can only be discharged from the gap between the retaining cylinder 8 and the exhaust cylinder 9, achieving a moderate balanced damping effect.

[0032] In Figure 2 and Figure 3 In Figure 3 , sliding frames 22 are respectively fixedly connected to the bottoms of the two retaining pieces 21. The sliding frames 22 are located inside the bottom plate 3. A second movable groove 23 corresponding to the sliding frames 22 is provided inside the bottom plate 3. The center of the outer side of the sliding frame 22 is fixedly connected to the inner side wall of the second movable groove 23 through an elastic strip 24. The inner sides of the two sliding frames 22 are in contact with each other. The two sliding frames 22 respectively use the two movable plates 20 to make the two retaining pieces 21 fit together, and the diameter of the circular plate formed by the two retaining pieces 21 is the same as the outer diameter of the retaining cylinder 8. When the top of the retaining cylinder 8 enters the bottom of the exhaust port 10, the retaining cylinder 8 will block the rapid discharge of air inside the outer cylinder 1, thereby improving the damping effect of the entire air damper. When the retaining piece 21 contacts the bottom surface of the filter plate 16, at this time, the retaining piece 21 and the top of the retaining cylinder 8 cannot block the air inside the outer cylinder 1 from flowing into the air port 18 through the gap between the retaining cylinder 8 and the exhaust cylinder 9, and finally is discharged from the air port 18 and the top of the exhaust port 10 into the exhaust cylinder 9. After the retaining cylinder 8 uses the retaining piece 21 to limit the position of the filter plate 16, due to the elastic force of the elastic strip 24, the inner sides of the two sliding frames 22 are in contact with each other. At this time, the sliding frames 22 use the movable plates 20 to make the two retaining pieces 21 fit together. At this time, the gap between the retaining cylinder 8 and the exhaust cylinder 9 will not decrease, ensuring a moderate balanced damping effect.

[0033] In Figure 2 and Figure 3In the figure, strip grooves 25 are provided on both sides of the top of the bottom plate 3, and the bottom of the strip grooves 25 communicates with the second movable groove 23 correspondingly. The top of the sliding frame 22 penetrates through the strip grooves 25, and the top end of the sliding frame 22 is located at the top of the top surface of the bottom plate 3. The sliding frame 22 is slidably matched with the strip grooves 25. Moving frames 26 are movably sleeved on the surfaces of the two side rods 6. Both ends of the inner side surface of the moving frame 26 are provided with first connecting frames 27. Both sides of the top surface of the sliding frame 22 are provided with second connecting frames 28. The two moving frames 26 and the two sliding frames 22 are arranged in a cross-corresponding manner, and the first connecting frame 27 and the second connecting frame 28 are rotationally connected by a rotating plate 29, and two adjacent corresponding rotating plates 29 are arranged in a staggered manner. When the bottom surface of the piston 7 contacts the top surface of the moving frame 26, at this time, the piston 7 drives the moving frame 26 to move downward synchronously. When the moving frame 26 moves downward, the moving frame 26 makes the top end of the rotating plate 29 move downward by means of the first connecting frames 27 at both ends. The rotating plate 29 rotates and then pushes the sliding frame 22 to slide inside the strip groove 25. Since two adjacent corresponding rotating plates 29 are arranged in a staggered manner, at this time, the two sliding frames 22 are separated from each other under the push of the rotating plate 29. During the process of the sliding frame 22 sliding inside the second movable groove 23, the elastic strip 24 is extruded, and the sliding frame 22 makes the baffle 21 move by means of the movable plate 20. The two baffles 21 are gradually separated during the movement of the movable plate 20. At this time, the top surface of the baffle 21 gradually corresponds to the air port 18 of the filter plate 16. The air inside the outer cylinder 1 cannot be discharged through the exhaust port 10. As the piston 7 continues to move downward, the piston 7 extrudes the air inside the outer cylinder 1, and the extrusion of the filter plate 16 on the first spring 17 and the extrusion of the sliding frame 22 on the elastic strip 24 make the pressure inside the outer cylinder 1 gradually increase, and the damping effect inside the outer cylinder 1 gradually increases. Until the pressure inside the outer cylinder 1 is the same as the force applied on the exhaust cylinder 9, the piston 7 cannot continue to extrude the outer cylinder 1 by means of the exhaust cylinder 9, which greatly improves the damping effect of the entire air damper.

[0034] In Figure 2 In the figure, second springs 30 are sleeved on the surfaces of the front and rear two side rods 6. The top end of the second spring 30 is fixedly connected to the bottom surface of the piston 7, and the bottom end of the second spring 30 is fixedly connected to the top surface of the bottom plate 3. When the piston 7 moves downward inside the outer cylinder 1, at this time, the piston 7 extrudes the second spring 30, and the preliminary damping effect of the entire air damper is ensured by means of the second spring 30. When the force applied on the exhaust cylinder 9 disappears, at this time, the elastic force of the second spring 30, the elastic force of the elastic strip 24, the elastic force of the first spring 17, and the air pressure inside the outer cylinder 1 make the piston 7 move upward inside the outer cylinder 1. External air will gradually enter the inside of the outer cylinder 1 through the exhaust port 10. The multiple air ports 18 on the surface of the filter plate 16 can prevent external air from entering the inside of the outer cylinder 1 too quickly, which is convenient for the entire air damper to recover relatively slowly and avoid the piston 7 colliding and being damaged with the top ring 2 at the top due to the rapid recovery of the entire air damper.

[0035] Working principle of the present invention:

[0036] Refer to the attached Figure 1-3 In the actual use process, when the exhaust cylinder 9 is pushed to move, at this time, the exhaust cylinder 9 pushes the piston 7 to move downward on the surfaces of multiple support rods 6. During the downward movement of the piston 7 inside the outer cylinder 1, it cooperates with the bottom plate 3 to squeeze the air inside the outer cylinder 1. The air inside the outer cylinder 1 is discharged from the exhaust port 10 of the exhaust cylinder 9 during the downward movement of the piston 7, thus forming a moving damping effect. Until the top of the baffle cylinder 8 enters the bottom of the exhaust port 10, at this time, the baffle cylinder 8 can block the exhaust port 10. The air inside the outer cylinder 1 enters the exhaust port 10 through the gap between the baffle cylinder 8 and the exhaust cylinder 9, and finally is discharged from the outer cylinder 1 through the top of the exhaust port 10, further improving the damping effect of the entire air damper.

[0037] During the process of the air inside the outer cylinder 1 being discharged through the exhaust port 10, at this time, the air at the bottom of the exhaust port 10 will flow to the top of the exhaust port 10 through multiple air ports 18 on the surface of the filter plate 16. The filter plate 16 itself will generate a certain resistance to the flowing air inside the exhaust port 10, thereby improving the damping effect of the entire air damper. The flow of air further causes the filter plate 16 to move upward inside the exhaust port 10, and the filter plate 16 squeezes the first spring 17 on the surface of the vertical rod 15 until the elastic force of the first spring 17 is the same as the thrust of the air on the filter plate 16, at which time the filter plate 16 stops moving.

[0038] After the bottom surface of the piston 7 contacts the top surface of the moving frame 26, at this time, the piston 7 drives the moving frame 26 to move downward synchronously. When the moving frame 26 moves downward, the moving frame 26 uses the first connecting frames 27 at both ends to lower the top end of the rotating plate 29. The rotation of the rotating plate 29 further pushes the sliding frame 22 to slide inside the strip groove 25. Since two adjacent corresponding rotating plates 29 are staggeredly arranged, at this time, the two sliding frames 22 are separated from each other under the push of the rotating plate 29. During the process of the sliding frame 22 sliding inside the second moving groove 23, it squeezes the elastic strip 24, and the sliding frame 22 uses the movable plate 20 to move the retaining piece 21. The two retaining pieces 21 are gradually separated during the movement of the movable plate 20. At this time, the top surface of the retaining piece 21 gradually corresponds to the air port 18 of the filter plate 16, and the air inside the outer cylinder 1 cannot be discharged through the exhaust port 10. As the piston 7 continues to move downward, the piston 7 squeezes the air inside the outer cylinder 1, and the squeezing of the filter plate 16 on the first spring 17 and the squeezing of the sliding frame 22 on the elastic strip 24 cause the pressure inside the outer cylinder 1 to gradually increase, and the damping effect inside the outer cylinder 1 gradually increases. Until the pressure inside the outer cylinder 1 is the same as the force applied to the exhaust cylinder 9, it is no longer possible to use the exhaust cylinder 9 to squeeze the outer cylinder 1 with the piston 7, greatly improving the damping effect of the entire air damper.

[0039] After the force applied to the exhaust pipe 9 disappears, at this time, the elastic force of the second spring 30, the elastic force of the elastic strip 24, the elastic force of the first spring 17, and the air pressure inside the outer cylinder 1 cause the piston 7 to move upward inside the outer cylinder 1. External air will gradually enter the inside of the outer cylinder 1 through the exhaust port 10. The multiple air ports 18 on the surface of the filter plate 16 can prevent the external air from entering the inside of the outer cylinder 1 too quickly, facilitating the relatively slow recovery of the entire air damper and avoiding the piston 7 from colliding and being damaged with the top ring 2 at the top due to the rapid recovery of the entire air damper.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air damper, characterized in that: It includes an outer cylinder (1). At the top inside the outer cylinder (1), there is a top ring (2). At the bottom inside the outer cylinder (1), there is a bottom plate (3). At the bottom of the bottom plate (3), there is an annular inclined surface (4). The inclination direction of the annular inclined surface (4) gradually deviates towards the center of the bottom plate (3) from top to bottom. And at the bottom of the outer cylinder (1), there is a through opening corresponding to and cooperating with the annular inclined surface (4), and the diameter of the through opening at the bottom of the outer cylinder (1) is smaller than the diameter of the bottom plate (3). Around the periphery of the bottom surface of the outer cylinder (1), there are screw rods (5) provided, and the outer cylinder (1) is fixedly connected to the bottom plate (3) by a plurality of screw rods (5). The bottom surface of the top ring (2) is fixedly connected to the bottom plate (3) by four support rods (6). The four support rods (6) are annularly and equidistantly located at four positions of the bottom plate (3). Between the top ring (2) and the bottom plate (3), there is a piston (7), and the support rods (6) penetrate through the piston (7). The circumferential outer side surface of the piston (7) is correspondingly attached to the circumferential inner side wall of the outer cylinder (1). At the center of the top surface of the bottom plate (3), there is a blocking cylinder (8). At the center of the top surface of the piston (7), there is an exhaust cylinder (9) corresponding to and matching the blocking cylinder (8), and at the center of the exhaust cylinder (9), there is an exhaust port (10). The top of the blocking cylinder (8) is correspondingly arranged with the bottom opening of the exhaust port (10), and the outer diameter of the blocking cylinder (8) is smaller than the diameter of the exhaust port (10). Inside the blocking cylinder (8), there is a first movable groove (19). Inside the first movable groove (19), there are two movable plates (20) provided, and the two movable plates (20) are arranged oppositely. At the top of both movable plates (20), there are semi-circular blocking pieces (21) fixedly connected. The two blocking pieces (21) are correspondingly arranged with a plurality of air ports (18) on the surface of the filter plate (16). At the bottom of the two blocking pieces (21), there are slide frames (22) fixedly connected respectively. The slide frames (22) are located inside the bottom plate (3). Inside the bottom plate (3), there is a second movable groove (23) corresponding to and cooperating with the slide frames (22). On the surfaces of the front and rear support rods (6), there is a second spring (30) sleeved. The top end of the second spring (30) is fixedly connected to the bottom surface of the piston (7), and the bottom end of the second spring (30) is fixedly connected to the top surface of the bottom plate (3).

2. The air damper according to claim 1, wherein: At the top of the outer cylinder (1), there is a top cover (11). At the bottom of the top cover (11), there is an annular clamping strip (12). On the top surface of the top ring (2), there is an annular groove (13) rotatably cooperating with the annular clamping strip (12). The circumferential outer side surface at the bottom of the top cover (11) is spirally sleeved on the circumferential outer side surface at the top of the outer cylinder (1) by the rotational cooperation of the annular clamping strip (12) and the annular groove (13).

3. The air damper according to claim 1, wherein: On both sides of the inner wall of the exhaust port (10) of the exhaust pipe (9), there are sliding grooves (14). Inside the sliding grooves (14), there are vertical rods (15). Inside the exhaust port (10), there is a filter plate (16). The circumferential outer side of the filter plate (16) is in contact with the inner side wall of the exhaust port (10), and on the circumferential outer side of the filter plate (16), there are convex plates corresponding to and matching the sliding grooves (14). The vertical rods (15) penetrate through the convex plates, and at the top of the convex plates, there are first springs (17), and the first springs (17) are sleeved on the surfaces of the vertical rods (15). On the surface of the filter plate (16), a plurality of vertical air ports (18) are arranged in an annular and equally spaced manner, and the top opening and the bottom opening of the exhaust port (10) are correspondingly communicated through the plurality of air ports (18).

4. The air damper according to claim 1, wherein: At the center of the outer side of the carriage (22), it is fixedly connected to the inner side wall of the second movable groove (23) through an elastic strip (24). The inner sides of the two carriages (22) are in contact with each other. The two carriages (22) respectively make the two baffles (21) in contact with each other through the two movable plates (20), and the diameter of the circular plate formed by the two baffles (21) is the same as the outer diameter of the baffle cylinder (8).

5. The air damper according to claim 4, wherein: On both sides of the top of the bottom plate (3), there are strip grooves (25). The bottom of the strip grooves (25) is correspondingly communicated with the second movable groove (23). The top of the carriage (22) penetrates through the strip grooves (25), and the top end of the carriage (22) is located above the top surface of the bottom plate (3). The carriage (22) is in sliding fit with the strip grooves (25).

6. The air damper according to claim 5, wherein: On the surfaces of the support rods (6) on both sides, there are movable sleeves (26). At both ends of the inner side of the movable sleeves (26), there are first connecting frames (27). On both sides of the top surface of the carriage (22), there are second connecting frames (28). The two movable sleeves (26) and the two carriages (22) are arranged in a cross-corresponding manner, and the first connecting frames (27) and the second connecting frames (28) are rotatably connected by a rotating plate (29), and the adjacent corresponding rotating plates (29) are staggered.

7. The air damper according to claim 1, wherein: On the circumferential outer side of the piston (7) and the annular inclined surface (4), rubber sleeves are pasted. The piston (7) and the annular inclined surface (4) respectively cooperate with the circumferential inner side wall of the outer cylinder (1) and the bottom through hole of the outer cylinder (1) by means of the rubber sleeves.

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