A silent pressurized air outlet structure of a fan

Abstract

The present invention discloses a silent pressurized air outlet structure of a fan, which relates to the technical field of heat dissipation fans and comprises a protective shell, fan blades, a motor, a base and a buffer box, wherein the motor is mounted on the bottom wall of the protective shell through the base, the fan blades are fixedly mounted on the rotating shaft through a mounting shaft, the rotating shaft is fixedly mounted on the output shaft of the motor through a coupling, and four mutually symmetrical connecting rods are fixedly mounted on the surrounding side walls of the base, and the other ends of the connecting rods are fixedly mounted inside the buffer box, when the motor shakes horizontally, the base generates impact force in all directions, and the extrusion limit ring is deformed, at which time the limit ring squeezes the buffer spring, and the buffer spring initially absorbs the impact force, and when the impact force is large, the end of the mounting groove contacts the end of the connecting rod, the base squeezes the buffer box through the connecting rod, and the buffer box absorbs the impact force for a second time, thereby effectively reducing the horizontal shaking of the motor and reducing the overall noise of the fan.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation fans, and in particular to a silent pressurized air outlet structure of a fan. Background Art

[0002] The blades of an axial flow fan push the air to flow in the same direction as the axis. The impeller of an axial flow fan is somewhat similar to a propeller. When it is working, most of the airflow flows parallel to the axis. When it is running, the power consumption will increase with the increase of the airflow back pressure. Due to its compact structure, the axial flow fan can save a lot of space and is easy to install, so it is widely used.

[0003] However, ordinary fans often make loud noises when they rotate, which affects the user experience. This is because the fan blades periodically cut the air, generating various vortices, which will emit aerodynamic noise, especially the vortex at the blade tip, which has the largest energy and the loudest noise. In addition, mechanical noise generated by components such as motor rotation and blade vibration is also one of the sources of fan noise. For this reason, we designed a silent booster outlet structure for the fan to reduce the fan noise. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a silent pressurized air outlet structure of a fan, which effectively reduces the horizontal shaking of the motor and reduces the overall noise of the fan.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: including a protective shell, fan blades, a motor, a base and a buffer box, the protective shell is configured as a hollow box structure, and four fan blades are arranged inside the protective shell, the fan blades are fixedly mounted on the outer wall of the mounting shaft, and a mounting hole is opened inside the mounting shaft, and a card slot one is opened on the side wall of the mounting hole, the mounting shaft is clamped on the card key outside the rotating shaft through the card slot one, and the rotating shaft is connected to the output shaft of the motor through a coupling, the motor is fixedly mounted on the top wall of the base, the base is mounted on the bottom wall of the protective shell, and an upper sleeve and a lower sleeve are respectively arranged at the upper and lower ends of the mounting shaft, wherein the upper sleeve and the lower sleeve are fixedly mounted on the outer wall of the rotating shaft, and four mutually symmetrical connecting rods are fixedly mounted on the surrounding side walls of the base, and the other ends of the connecting rods are fixedly mounted on the inside of the buffer box, and the buffer box is fixedly mounted on the surrounding side walls of the protective shell.

[0006] As a further solution of the present invention: four symmetrical mounting grooves are symmetrically opened in the side walls around the base, and the connecting rod is slidably installed in the mounting groove, and a gap is left between the top of the connecting rod and the mounting groove, so that the connecting rod can slide horizontally in the mounting groove, and at the same time, a sleeve is fixedly installed on the outside of the mounting groove, and the sleeve is slidably sleeved on the outer wall of the connecting rod, the sleeve can slide along the connecting rod, and a limiting ring is fixedly installed on the end of the connecting rod, and the connecting rod passes through the inside of the limiting ring, wherein the limiting ring is made of flexible material and can be deformed, and at the same time, a buffer spring is sleeved on the outside of the connecting rod, and the two ends of the buffer spring are respectively installed on the limiting ring and the side wall of the buffer box.

[0007] As a further solution of the present invention: the end of the connecting rod extends into the interior of the buffer box, and a top plate is fixedly installed on the end of the connecting rod, the top plate is located inside the buffer box, and a pair of triangular plates are fixedly installed on the bottom of the top plate, wherein the hypotenuses of the pair of triangular plates are arranged close to each other, and the bottom hypotenuses of the triangular plates are provided with a second card slot, a roller is slidably installed in the second card slot, and the roller is rotatably installed on the top wall of the vertical rod, and the bottom of the vertical rod is fixedly installed on the top wall of the slider one, the slider one is slidably installed in the slide rail one, and the slide rail one is fixedly installed on the bottom wall of the buffer box, and a pair of vertical rods are arranged on the bottom wall of the top plate , and a pair of vertical rods are symmetrical about the connecting rod, and at the same time, the top of the vertical rod is rotatably mounted on the bottom wall of the top plate through a rotating seat one, and the bottom of the vertical rod is rotatably mounted on the top wall of the slider two through a rotating seat two, wherein the slider two is slidably mounted in the slide rail two, and the slide rail two is fixedly mounted on the bottom wall of the buffer box, and at the same time, a sliding rod slides through the slider two and the slider one, and the two ends of the sliding rod are respectively mounted in the side walls of the buffer box and the fixed block, and the fixed block is fixedly mounted on the top wall of the slide rail one, and a tension spring is sleeved on the outer wall of the sliding rod, and the two ends of the tension spring are respectively fixedly mounted on the side walls of the slider one and the slider two.

[0008] As a further solution of the present invention: a telescopic rod is fixedly installed on the bottom wall of the top plate, and the bottom of the telescopic rod is fixedly installed on the bottom wall of the protection box. At the same time, a shock-absorbing spring is wound around the outside of the telescopic rod, and both ends of the shock-absorbing spring are respectively connected to the top plate and the side wall of the protection box.

[0009] As a further solution of the present invention: a side wing is fixedly installed on the outer wall of the fan blade, a welding groove is opened in the middle position of the side wing, and the side wing is symmetrically installed on the outer wall of the fan blade through the welding groove. At the same time, an air guide groove 1 is opened on the surface of the fan blade, and an air guide groove 2 is opened on a side wall of the side wing close to the fan blade, and the air guide groove 2 and the air guide groove 1 are connected together.

[0010] As a further solution of the present invention: a boosting plate is fixedly mounted on the inclined bottom of the fan blade, and boosting grooves are arranged between the boosting plates.

[0011] As a further solution of the present invention: a rib is fixedly mounted on the side wall of the fan blade, and the other end of the rib is fixedly mounted on the outer wall of the mounting shaft.

[0012] As a further solution of the present invention: a limiting block 1 is fixedly installed on the left and right sides of the slide rail 1, and a limiting block 2 is fixedly installed on a side wall of the slide rail 1 away from the buffer box.

[0013] As a further solution of the present invention: the vertical rod is arranged in an inclined state, and the inclination angle of the vertical rod is 15 degrees.

[0014] As a further solution of the present invention: a shock-absorbing copper sheet is fixedly mounted on the top wall of the lower sleeve, and the shock-absorbing copper sheet is located at the output end of the motor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: four buffer boxes are arranged inside the fan, and a limit ring is arranged in front of the buffer box. When the motor shakes horizontally, the base generates impact force in all directions, driving the limit sleeve to move, thereby squeezing the limit ring to deform. At this time, the limit ring squeezes the buffer spring, and the buffer spring initially absorbs the impact force. When the impact force is large, the end of the mounting groove and the end of the connecting rod contact each other, and the base squeezes the buffer box through the connecting rod, and the buffer box absorbs the impact force for a second time, thereby effectively reducing the horizontal shaking of the motor and reducing the overall noise of the fan. At the same time, a tensioning spring is arranged inside the buffer box, and the two ends of the tensioning spring are respectively fixedly mounted on the side walls of slider one and slider two. The tensioning spring tightens slider one and slider two, generates elastic force to offset the impact force, and transfers the impact force in the vertical direction to the horizontal direction. The offset effect is better, thereby increasing the stability of the base.

[0016] At the same time, side wings are arranged on the outer wall of the fan blade, and air guide groove 1 and air guide groove 2 are respectively provided on the fan blade and the side wing, and air guide groove 2 and air guide groove 1 are connected together. When the fan is working, air is introduced into the two ends of the side wing along air guide groove 1 and air guide groove 2, breaking up the generation of blade tip vortex and accelerating the dissipation of blade tip vortex, thereby effectively reducing airflow noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side sectional view of the present invention.

[0018] Figure 2 This is a top view of the base installation of the present invention.

[0019] Figure 3 It is a partial enlarged view of point A of the present invention.

[0020] Figure 4 It is a schematic diagram of the internal structure of the buffer box of the present invention.

[0021] Figure 5 It is a top view of the fan blade of the present invention.

[0022] Figure 6 It is a schematic diagram of the fan blade structure of the present invention.

[0023] Figure 7 It is a schematic diagram of the wing structure of the present invention.

[0024] As shown in the figure: 1. Protective shell, 2. Fan blades, 3. Rotating shaft, 4. Motor, 5. Base, 6. Key, 7. Mounting shaft, 8. Lower sleeve, 9. Upper sleeve, 10. Shock-absorbing copper sheet, 11. Connecting rod, 12. Buffer box, 13. Sleeve, 14. Limiting ring, 15. Buffer spring 1, 16. Side wing, 17. Mounting groove, 18. Top plate, 19. Triangle plate, 20. Slot 2, 21. Roller, 22. Vertical rod, 23. Slider 1, 24, slide rail 1, 25, slide rod, 26, support rod, 27, rotating seat 1, 28, rotating seat 2, 29, slider 2, 30, slide rail 2, 31, tension spring, 32, fixed block, 33, limit block 1, 34, limit block 2, 35, telescopic rod, 36, shock-absorbing spring, 37, rib, 38, boost plate, 39, boost slot, 40, air guide slot 1, 41, welding slot, 42, air guide slot 2, 43, card slot 1. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figures 1 to 7In an embodiment of the present invention, a silent pressurized air outlet structure of a fan comprises a protective shell 1, a fan blade 2, a motor 4, a base 5 and a buffer box 12, wherein the protective shell 1 is configured as a hollow box structure, and four fan blades 2 are arranged inside the protective shell 1, and the fan blades 2 are fixedly mounted on the outer wall of a mounting shaft 7, and a mounting hole is provided inside the mounting shaft 7, and a card slot 43 is provided on the side wall of the mounting hole, and the mounting shaft 7 is clamped on a card key 6 outside a rotating shaft 3 through the card slot 43, and the rotating shaft 3 drives the fan blade 2 to rotate through the card key 6, and the rotating shaft 3 is connected to the output shaft of the motor 4 through a coupling, and the motor 4 is fixedly mounted on the top wall of the base 5, and the base 5 is mounted on the bottom wall of the protective shell 1, and the upper and lower ends of the mounting shaft 7 are respectively provided with There are an upper sleeve 9 and a lower sleeve 8, wherein the upper sleeve 9 and the lower sleeve 8 are fixedly mounted on the outer wall of the rotating shaft 3, and the axial sliding of the mounting shaft 7 is limited by the upper sleeve 9 and the lower sleeve 8. At the same time, a shock-absorbing copper sheet 10 is fixedly mounted on the top wall of the lower sleeve 8, and the shock-absorbing copper sheet 10 is located at the output end of the motor 4. The shock-absorbing copper sheet 10 reduces the influence of the vibration generated by the motor 4 on the fan blade 2, thereby increasing the working stability of the fan blade 2 and effectively reducing the noise generated during the operation of the fan blade 2. At the same time, four mutually symmetrical connecting rods 11 are fixedly mounted on the side walls around the base 5, and the other end of the connecting rod 11 is fixedly mounted on the inside of a buffer box 12. The buffer box 12 is fixedly mounted on the side walls around the protective shell 1, and the horizontal shaking of the motor 4 is buffered by the buffer box 12.

[0028] Among them, four mutually symmetrical mounting grooves 17 are symmetrically opened in the side walls around the base 5, and the connecting rod 11 is slidably installed in the mounting groove 17, and a gap is left between the top of the connecting rod 11 and the mounting groove 17, so that the connecting rod 11 can slide horizontally in the mounting groove 17, and a sleeve 13 is fixedly installed on the outside of the mounting groove 17, and the sleeve 13 is slidably sleeved on the outer wall of the connecting rod 11. The sleeve 13 can slide along the connecting rod 11, and a limiting ring 14 is fixedly installed on the end of the connecting rod 11, and the connecting rod 11 passes through the inside of the limiting ring 14, wherein the limiting ring 14 is made of flexible material, and the limiting ring 14 can be deformed, and at the same time, the outer wall of the connecting rod 11 The sleeve is provided with a buffer spring 15, and the two ends of the buffer spring 15 are respectively installed on the limit ring 14 and the side wall of the buffer box 12; when the motor 4 shakes horizontally, the base 5 generates an impact force in all directions, driving the limit sleeve 13 to move, thereby squeezing the limit ring 14 to deform. At this time, the limit ring 14 squeezes the buffer spring 15, and the buffer spring 15 initially absorbs the impact force. When the impact force is large, the end of the installation groove 17 and the end of the connecting rod 11 contact each other, and the base 5 squeezes the buffer box 12 through the connecting rod 11, and the buffer box 12 absorbs the impact force for a second time, thereby effectively reducing the horizontal shaking of the motor 4 and reducing the overall noise of the fan.

[0029] The end of the connecting rod 11 extends into the interior of the buffer box 12, and a top plate 18 is fixedly installed at the end of the connecting rod 11, and the top plate 18 is located inside the buffer box 12. At the same time, a pair of triangular plates 19 are fixedly installed at the bottom of the top plate 18, wherein the hypotenuses of the pair of triangular plates 19 are arranged close to each other, and a second card slot 20 is provided at the bottom hypotenuse of the triangular plate 19, and a roller 21 is slidably installed in the second card slot 20, and the roller 21 is rotatably installed on the top wall of the vertical rod 22, and at the same time, the bottom of the vertical rod 22 is fixedly installed on the top wall of the slider 1 23, and the slider 1 23 is slidably installed on the slide rail 1 24. The first slide rail 24 is fixedly mounted on the bottom wall of the buffer box 12, and a pair of vertical rods 22 are arranged on the bottom wall of the top plate 18. The vertical rods 22 are arranged in an inclined shape, and the inclination angle of the vertical rods 22 is 15 degrees, and the pair of vertical rods 22 are symmetrical about the connecting rod 11. At the same time, the top of the vertical rod 22 is rotatably mounted on the bottom wall of the top plate 18 through a rotating seat 27, and the bottom of the vertical rod 22 is rotatably mounted on the top wall of the sliding block 29 through a rotating seat 28, wherein the sliding block 29 is slidably mounted in the second slide rail 30, and the second slide rail 30 is fixedly mounted on the bottom wall of the buffer box 12, and the sliding block 29 is slidably mounted in the second slide rail 30. The ... A slide bar 25 slides through the block 29 and the slider 1 23, and the two ends of the slide bar 25 are respectively installed in the side walls of the buffer box 12 and the fixed block 32, and the fixed block 32 is fixedly installed on the top wall of the slide rail 1 24. A tension spring 31 is sleeved on the outer wall of the slide bar 25, and the two ends of the tension spring 31 are respectively fixedly installed on the side walls of the slider 1 23 and the slider 2 29. The slider 1 23 and the slider 2 29 are tightened by the tension spring 31. At the same time, the limit blocks 1 33 are fixedly installed on the left and right sides of the slide rail 1 23, and the slider 1 23 is protected by the limit blocks 1 33. A limit block 2 34 is fixedly installed on a side wall of the slide rail 1 23 away from the buffer box 12 to prevent the slider from detaching from the surface of the slide rail; when the connecting rod 11 is squeezed inward, it drives the top plate 18 to move downward, and the two triangular plates 19 drive the two sliders 1 23 to move towards each other through the roller 21. At the same time, the top plate 18 squeezes the vertical rod 22 to tilt, driving the two sliders 29 to move backwards. At this time, the tensioning spring 31 is tightened to generate elastic force to offset the impact force, and the impact force in the vertical direction is transferred to the horizontal direction, which has a better offset effect, thereby increasing the stability of the base 5.

[0030] Among them, a telescopic rod 35 is fixedly installed on the bottom wall of the top plate 18, and the bottom of the telescopic rod 35 is fixedly installed on the bottom wall of the protection box 12. At the same time, a shock-absorbing spring 36 is wound around the outside of the telescopic rod 35, and the two ends of the shock-absorbing spring 36 are respectively connected to the top plate 18 and the side wall of the protection box 12. The shock-absorbing spring 36 performs secondary buffering on the top plate 18, which has a better buffering effect on the top plate 18.

[0031] Among them, a side wing 16 is fixedly installed on the outer wall of the fan blade 2, and a welding groove 41 is opened in the middle position of the side wing 16. The side wing 16 is symmetrically installed on the outer wall of the fan blade 2 through the welding groove 41. At the same time, an air guide groove 1 40 is opened on the surface of the fan blade 2, and an air guide groove 2 42 is opened on a side wall of the side wing 16 close to the fan blade 2. The air guide groove 2 42 and the air guide groove 1 40 are connected together. During the operation of the fan, the air is introduced into the two ends of the side wing 16 along the air guide groove 1 40 and the air guide groove 2 42, breaking up the generation of the blade tip vortex and accelerating the dissipation of the blade tip vortex, thereby effectively reducing the airflow noise.

[0032] Among them, a boost plate 38 is fixedly installed on the inclined bottom of the fan blade 2, and a boost groove 39 is arranged between the boost plates 38. During the rotation of the fan, a height difference is formed between the boost groove 39 and the top of the fan blade 2, thereby achieving the purpose of increasing the wind pressure and increasing the air output.

[0033] Among them, a rib 37 is fixedly installed on the side wall of the fan blade 2, and the other end of the rib 37 is fixedly installed on the outer wall of the mounting shaft 7. The mass distribution of the fan blade 2 is changed by the rib 37. Under the action of centrifugal force, as the fan rotates, the fan blade 2 will experience stress toughening, which increases the rigidity of the fan blade 2, reduces the risk of breakage of the fan blade 2, and increases the service life of the fan.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention, and the contents not described in detail in this specification shall belong to the prior art known to professional and technical personnel in the field.

Claims

1. A silent pressurized air outlet structure of a fan, comprising a protective housing (1), fan blades (2), a motor (4), a base (5) and a buffer box (12), characterized in that: The protective shell (1) is configured as a hollow box structure, and four blades (2) are disposed inside the protective shell (1), and the blades (2) are fixedly mounted on the outer wall of the mounting shaft (7). A mounting hole is provided inside the mounting shaft (7), and a clamping groove (43) is provided on the side wall of the mounting hole. The mounting shaft (7) is clamped on a clamping key (6) outside the rotating shaft (3) through the clamping groove (43). The rotating shaft (3) is connected to the output shaft of the motor (4) through a coupling, and the motor (4) is fixedly mounted on the base ( 5), the base (5) is mounted on the bottom wall of the protective shell (1), and the upper and lower ends of the mounting shaft (7) are respectively provided with an upper sleeve (9) and a lower sleeve (8), wherein the upper sleeve (9) and the lower sleeve (8) are fixedly mounted on the outer wall of the rotating shaft (3), and four mutually symmetrical connecting rods (11) are fixedly mounted on the surrounding side walls of the base (5), and the other end of the connecting rod (11) is fixedly mounted inside a buffer box (12), and the buffer box (12) is fixedly mounted on the surrounding side walls of the protective shell (1); Four mutually symmetrical mounting grooves (17) are symmetrically provided in the side walls around the base (5), and the connecting rod (11) is slidably installed in the mounting groove (17), and a gap is left between the top of the connecting rod (11) and the mounting groove (17), so that the connecting rod (11) can slide horizontally in the mounting groove (17), and a sleeve (13) is fixedly installed on the outside of the mounting groove (17), and the sleeve (13) is slidably sleeved on the outer wall of the connecting rod (11), and the sleeve (13) can slide along the connecting rod (11), and a limiting ring (14) is fixedly installed on the end of the connecting rod (11), and the connecting rod (11) passes through the inside of the limiting ring (14), wherein the limiting ring (14) is made of flexible material, and the limiting ring (14) can be deformed, and a buffer spring (15) is sleeved on the outside of the connecting rod (11), and the two ends of the buffer spring (15) are respectively installed on the limiting ring (14) and the side wall of the buffer box (12); The end of the connecting rod (11) extends into the interior of the buffer box (12), and a top plate (18) is fixedly installed at the end of the connecting rod (11), the top plate (18) is located inside the buffer box (12), and a pair of triangular plates (19) are fixedly installed at the bottom of the top plate (18), wherein the oblique sides of the pair of triangular plates (19) are arranged close to each other, and the bottom oblique sides of the triangular plates (19) are provided with a second card slot (20), and a roller (21) is slidably installed in the second card slot (20), and the roller (21) is rotatably installed on the top wall of the vertical rod (22), and the bottom of the vertical rod (22) is fixedly installed on the top wall of a slider (23), and the slider (23) is slidably installed in a slide rail (24), and the slide rail (24) is fixedly installed on the bottom wall of the buffer box (12), and a pair of vertical rods (22) are arranged on the bottom wall of the top plate (18), and the pair of vertical rods (22) ) is symmetrical about the connecting rod (11), and the top of the vertical rod (22) is rotatably mounted on the bottom wall of the top plate (18) through a rotating seat (27), and the bottom of the vertical rod (22) is rotatably mounted on the top wall of a sliding block (29) through a rotating seat (28), wherein the sliding block (29) is slidably mounted in a sliding rail (30), and the sliding rail (30) is fixedly mounted on the bottom wall of the buffer box (12), and a sliding rod (25) is slidably passed through the sliding block (29) and the sliding block (23), and the two ends of the sliding rod (25) are respectively mounted in the side walls of the buffer box (12) and the fixed block (32), and the fixed block (32) is fixedly mounted on the top wall of the sliding rail (24), and a tension spring (31) is sleeved on the outer wall of the sliding rod (25), and the two ends of the tension spring (31) are respectively fixedly mounted on the side walls of the sliding block (23) and the sliding block (29); A side wing (16) is fixedly mounted on the outer wall of the fan blade (2), a welding groove (41) is provided in the middle of the side wing (16), and the side wing (16) is symmetrically mounted on the outer wall of the fan blade (2) through the welding groove (41). At the same time, a first air guide groove (40) is provided on the surface of the fan blade (2), and a second air guide groove (42) is provided on a side wall of the side wing (16) close to the fan blade (2), and the second air guide groove (42) and the first air guide groove (40) are connected together.

2. The silent pressurized air outlet structure of a fan according to claim 1, characterized in that: A telescopic rod (35) is fixedly mounted on the bottom wall of the top plate (18), and the bottom of the telescopic rod (35) is fixedly mounted on the bottom wall of the protection box (12). A shock absorbing spring (36) is wound around the outside of the telescopic rod (35), and the two ends of the shock absorbing spring (36) are respectively connected to the top plate (18) and the side wall of the protection box (12).

3. The silent pressurized air outlet structure of a fan according to claim 1, characterized in that: A supercharging plate (38) is fixedly mounted on the inclined bottom of the fan blade (2), and supercharging grooves (39) are arranged between the supercharging plates (38).

4. The silent pressurized air outlet structure of a fan according to claim 1, characterized in that: A rib (37) is fixedly mounted on the side wall of the fan blade (2), and the other end of the rib (37) is fixedly mounted on the outer wall of the mounting shaft (7).

5. The silent pressurized air outlet structure of a fan according to claim 1, characterized in that: Limiting blocks 1 (33) are fixedly installed on the left and right sides of the slide rail 1 (23), and limiting blocks 2 (34) are fixedly installed on a side wall of the slide rail 1 (23) away from the buffer box (12).

6. The silent pressurized air outlet structure of a fan according to claim 1, characterized in that: The vertical rod (22) is arranged in an inclined shape, and the inclination angle of the vertical rod (22) is 15 degrees.

7. The silent pressurized air outlet structure of a fan according to claim 1, characterized in that: A shock-absorbing copper sheet (10) is fixedly mounted on the top wall of the lower shaft sleeve (8), and the shock-absorbing copper sheet (10) is located at the output end of the motor (4).

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