Noise reduction device for fan

Abstract

The utility model discloses a noise reduction device for a fan, which belongs to the technical field of fans. The key points of its technical solution include a base, both sides of the top of the base are fixedly connected with support plates, and the opposite sides of the two support plates are fixedly connected with a first rotating frame, the first rotating frame is internally rotatably connected with a first shock-absorbing component, and a noise reduction cylinder is arranged between the opposite sides of the two first shock-absorbing components. By arranging the first shock-absorbing component, when the moving rod moves, it will drive the rubber pad to squeeze the reset spring, and the elastic force of the reset spring in the opposite direction will offset the extrusion force of the rubber pad when it moves, so as to achieve a shock-absorbing effect on the generated vibration, and by arranging the second shock-absorbing component, the mounting seat will drive the two extrusion blocks to move in opposite directions, and the movement of the extrusion block will squeeze the strong spring, and the opposite elastic force of the strong spring will offset the extrusion force of the extrusion block when it moves, so as to further improve the shock-absorbing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a noise reduction device for fans. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and deliver gas. It is a driven fluid machine. Fan is China's customary abbreviation for gas compression and gas delivery machinery. Commonly referred to fans include ventilators, blowers, wind turbines, and axial flow fans are one type of fans.

[0003] A Chinese utility model currently published with the publication number CN213574704U discloses a fan noise reduction device, which solves the problems of complex structure, inconvenient use, poor noise reduction effect and difficult cleaning in the prior art. The utility model at least includes a noise reduction cylinder and noise-reducing cotton arranged on the inner surface of the noise reduction cylinder; the noise reduction cylinder is composed of two semi-cylindrical bodies with the same structure that can be detachably fastened. A fan noise reduction device of the utility model forms a complete noise reduction body through two semi-cylindrical bodies and a first fixing ring and a second fixing ring. The detachable connection form can be disassembled for cleaning after long-term use to prevent dust clogging. In addition, the first external thread and the second external thread on both sides of the noise reduction cylinder can be set so that when multiple fans are used in linkage, multiple noise reduction cylinders can be selected for connection and use to increase the noise reduction area.

[0004] Existing axial flow fans will vibrate during operation. The force of the vibration will cause the axial flow fan to collide with objects, resulting in noise. The noise will not only affect the working environment, but also cause hearing loss due to long-term interference from the noise, thus causing harm to the human body. Utility Model Content

[0005] The utility model provides a noise reduction device for a fan, aiming to solve the problem that the existing axial flow fan will vibrate during operation. The force of the vibration will cause the axial flow fan to collide with an object, thereby causing noise. The noise will not only affect the working environment, but also cause people's hearing to decline due to long-term interference from the noise, thus affecting the problem of human health.

[0006] The utility model is implemented as follows: a noise reduction device for a fan comprises a base, both sides of the top of the base are fixedly connected with support plates, the opposite sides of the two support plates are fixedly connected with a first rotating frame, the first rotating frame is rotatably connected with a first shock absorbing assembly inside, a noise reduction cylinder is arranged between the opposite sides of the two first shock absorbing assemblies, and the bottom of the noise reduction cylinder is fixedly connected with a second shock absorbing assembly;

[0007] The first shock absorbing assembly includes a mounting tube, a moving rod, a rubber pad and a return spring. The moving rod passes through the mounting tube and extends to the interior of the mounting tube. The rubber pad is fixedly connected to one end of the moving rod located inside the mounting tube. The return spring is sleeved on the surface of the moving rod, and the return spring is fixedly connected to the mounting tube and the rubber pad on one side thereof.

[0008] In order to achieve the effect of further reducing noise, as a preferred noise reduction device for a fan of the utility model, the second shock absorbing assembly includes a first connecting block, a second connecting block, an extrusion block, a pressure rod and a strong spring. The second connecting block is fixedly connected to the top of the extrusion block, and the pressure rod is rotatably connected to the first connecting block and the second connecting block on one side close to the first connecting block and the second connecting block respectively, and the strong spring is fixedly connected to the side away from the two extrusion blocks.

[0009] In order to achieve the effect that the first shock absorbing assembly can be connected to the shock absorbing cylinder, as a preferred noise reduction device for a fan of the utility model, connecting ears are fixedly connected on both sides of the surface of the noise reduction cylinder, and the connecting ears are fixedly connected to a second rotating frame on the side away from the noise reduction cylinder, and the second rotating frame is internally rotatably connected to the first rotating member, and the first rotating member is fixedly connected to the moving rod on the side close to the moving rod.

[0010] In order to achieve the effect that the first shock absorbing assembly can be connected to the second rotating frame, as a preferred noise reduction device for a fan of the utility model, the side of the mounting cylinder away from the noise reduction cylinder is fixedly connected to a second rotating member, and the second rotating member is rotatably connected to the inside of the first rotating frame.

[0011] In order to achieve the effect of supporting and limiting the second shock absorbing assembly, as a preferred noise reduction device for a fan of the utility model, a fixed block is fixedly connected to the top of the base, a limiting rod is fixedly connected between the opposite sides of the two fixed blocks, the extrusion block is slidably connected to the surface of the limiting rod, the strong spring is sleeved on the surface of the limiting rod, and the strong spring is fixedly connected to the fixed block on the side close to the fixed block.

[0012] In order to achieve the effect of fixing and limiting axial flow fans of different sizes, as a preferred noise reduction device for fans of the utility model, an arc plate is provided inside the noise reduction cylinder, and a movable bolt is rotatably connected to the top of the arc plate. The movable bolt passes through the noise reduction cylinder and is threadedly connected to the noise reduction cylinder.

[0013] In order to achieve the effect that the second connecting component can be connected to the noise reduction cylinder, as a preferred noise reduction device for a fan of the utility model, the bottom of the noise reduction cylinder is fixedly connected to a mounting seat, the first connecting block is fixedly connected to the bottom of the mounting seat and the surface of the mounting seat is set to rubber material.

[0014] In order to achieve the effect of limiting the moving trajectory of the rubber pad and the moving rod, as a preferred noise reduction device for a fan of the utility model, a sliding groove is opened on the inner wall of the mounting tube, and a slider is slidably connected to the inside of the sliding groove, and the side of the slider close to the rubber pad is fixedly connected to the rubber pad.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The noise reduction device for the fan is provided with a first shock-absorbing component. When the axial flow fan is running, noise is generated. The noise reduction cylinder can have a sound insulation effect on the noise. When the axial flow fan vibrates, the vibration force is transmitted to the noise reduction cylinder, so that the noise reduction cylinder drives the moving rod to move. When the moving rod moves, it drives the rubber pad to squeeze the reset spring, and the elastic force in the opposite direction of the reset spring will offset the extrusion force of the rubber pad when it moves, thereby achieving a shock-absorbing effect on the generated vibration. By providing a second shock-absorbing component, the noise reduction cylinder will have irregular movement when vibrating, so that it will drive the mounting seat and the first connecting block to move downward. When the first connecting block moves, it will drive the pressure rod to rotate. When the two pressure rods rotate, they will drive the corresponding extrusion blocks to move in the opposite direction. The movement of the extrusion block will squeeze the strong spring, and the opposite elastic force of the strong spring will offset the extrusion force of the extrusion block when it moves, thereby further improving the shock-absorbing effect and preventing the noise from causing harm to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall structural diagram of the noise reduction device for fans of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the first shock absorbing component in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the second shock absorbing assembly in the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the noise reduction cylinder in the utility model;

[0021] Figure 5 For this utility model Figure 1 A magnified schematic diagram of center A.

[0022] In the figure, 1, base; 2, support plate; 3, first rotating frame; 4, first shock absorbing assembly; 401, mounting tube; 402, moving rod; 403, rubber pad; 404, reset spring; 5, noise reduction cylinder; 6, second shock absorbing assembly; 601, first connecting block; 602, second connecting block; 603, extrusion block; 604, pressure rod; 605, strong spring; 7, connecting ear; 8, second rotating frame; 9, first rotating member; 10, second rotating member; 11, fixed block; 12, limit rod; 13, arc plate; 14, moving bolt; 15, mounting seat; 16, slide groove; 17, slider. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] See also Figure 1-5 The utility model provides a technical solution: a noise reduction device for a fan, comprising a base 1, both sides of the top of the base 1 are fixedly connected with support plates 2, the opposite sides of the two support plates 2 are fixedly connected with a first rotating frame 3, the first rotating frame 3 is internally rotatably connected with a first shock absorbing assembly 4, a noise reduction cylinder 5 is arranged between the opposite sides of the two first shock absorbing assemblies 4, and the bottom of the noise reduction cylinder 5 is fixedly connected with a second shock absorbing assembly 6;

[0026] The first shock absorbing assembly 4 includes a mounting tube 401, a moving rod 402, a rubber pad 403 and a return spring 404. The moving rod 402 passes through the mounting tube 401 and extends to the interior of the mounting tube 401. The rubber pad 403 is fixedly connected to one end of the moving rod 402 located inside the mounting tube 401. The return spring 404 is sleeved on the surface of the moving rod 402, and the return spring 404 is fixedly connected to one side close to the mounting tube 401 and the rubber pad 403 respectively.

[0027] In this embodiment: by setting the first shock absorbing component 4, when the axial flow fan is running, noise will be generated, and the noise reduction cylinder 5 can have a sound insulation effect on the noise. When the axial flow fan vibrates, the vibration force will be transmitted to the noise reduction cylinder 5, so that the noise reduction cylinder 5 will drive the moving rod 402 to move, and when the moving rod 402 moves, it will drive the rubber pad 403 to squeeze the reset spring 404, and the elastic force of the reset spring 404 in the opposite direction will offset the squeezing force of the rubber pad 403 when it moves, so that the vibration generated can be damped. The second shock absorbing component 6 is arranged, and the noise reduction cylinder 5 will have irregular movement when vibrating, which will drive the mounting seat 15 and the first connecting block 601 to move downward. When the first connecting block 601 moves, it will drive the pressure rod 604 to rotate. When the two pressure rods 604 rotate, they will drive the corresponding extrusion blocks 603 to move in the opposite direction. The movement of the extrusion block 603 will squeeze the strong spring 605, and the opposite elastic force of the strong spring 605 will offset the extrusion force of the extrusion block 603 when it moves, thereby further improving the shock absorption effect and preventing noise from causing harm to the human body.

[0028] As a technical optimization solution of the utility model, the second shock absorbing assembly 6 includes a first connecting block 601, a second connecting block 602, an extrusion block 603, a pressure rod 604 and a strong spring 605. The second connecting block 602 is fixedly connected to the top of the extrusion block 603, and the pressure rod 604 is rotatably connected to the first connecting block 601 and the second connecting block 602 on one side respectively close to the first connecting block 601 and the second connecting block 602, and the strong spring 605 is fixedly connected to the side away from the two extrusion blocks 603.

[0029] In this embodiment: by setting the second shock absorbing assembly 6, the noise reduction cylinder 5 will have irregular movement when vibrating, which will drive the mounting seat 15 and the first connecting block 601 to move downward. When the first connecting block 601 moves, it will drive the pressure rod 604 to rotate. When the two pressure rods 604 rotate, they will drive the corresponding extrusion blocks 603 to move in the opposite direction. The movement of the extrusion block 603 will squeeze the strong spring 605, and the opposite elastic force of the strong spring 605 will offset the extrusion force when the extrusion block 603 moves, thereby further improving the shock absorption effect.

[0030] As a technical optimization solution of the utility model, connecting ears 7 are fixedly connected on both sides of the surface of the noise reduction cylinder 5, and the side of the connecting ear 7 away from the noise reduction cylinder 5 is fixedly connected to the second rotating frame 8, and the internal rotation of the second rotating frame 8 is connected to the first rotating member 9, and the side of the first rotating member 9 close to the moving rod 402 is fixedly connected to the moving rod 402.

[0031] In this embodiment: through the above arrangement, the noise reduction cylinder 5 can be connected to the first shock absorbing assembly 4, so as to achieve a shock absorbing effect on the vibration of the noise reduction cylinder 5.

[0032] As a technical optimization solution of the present invention, a second rotating member 10 is fixedly connected to a side of the mounting cylinder 401 away from the noise reduction cylinder 5 , and the second rotating member 10 is rotatably connected to the inside of the first rotating frame 3 .

[0033] In this embodiment: through the above arrangement, the first shock absorbing assembly 4 can be connected to the second rotating member 10, so that the supporting plate 2 can support the noise reduction cylinder 5, thereby improving the stability in use.

[0034] As a technical optimization solution of the utility model, a fixed block 11 is fixedly connected to the top of the base 1, a limiting rod 12 is fixedly connected between the opposite sides of the two fixed blocks 11, the extrusion block 603 is slidably connected to the surface of the limiting rod 12, the strong spring 605 is sleeved on the surface of the limiting rod 12, and the strong spring 605 is fixedly connected to the fixed block 11 on the side close to the fixed block 11.

[0035] In this embodiment: through the above settings, the limiting rod 12 can limit the moving trajectory of the extrusion block 603, and can also limit the telescopic trajectory of the strong spring 605, thereby improving the use effect of the second shock absorbing assembly 6.

[0036] As a technical optimization solution of the utility model, an arc plate 13 is arranged inside the noise reduction cylinder 5, and a movable bolt 14 is rotatably connected to the top of the arc plate 13. The movable bolt 14 passes through the noise reduction cylinder 5 and is threadedly connected to the noise reduction cylinder 5.

[0037] In this embodiment: through the above arrangement, after the movable bolt 14 is rotated, the movable bolt 14 will drive the arc plate 13 to move downward or upward, so that the arc plate 13 can limit and fix axial flow fans of different sizes, thereby avoiding accidental falling of the axial flow fan during operation.

[0038] As a technical optimization solution of the utility model, the bottom of the noise reduction cylinder 5 is fixedly connected with a mounting seat 15, the first connecting block 601 is fixedly connected to the bottom of the mounting seat 15 and the surface of the mounting seat 15 is set to rubber material.

[0039] In this embodiment: through the above arrangement, the second shock absorbing assembly 6 can further reduce the shock of the noise reduction cylinder 5, thereby improving the noise reduction effect.

[0040] As a technical optimization solution of the utility model, a slide groove 16 is opened on the inner wall of the installation tube 401, and a slider 17 is slidably connected inside the slide groove 16. The slider 17 is fixedly connected to the rubber pad 403 on one side thereof close to the rubber pad 403.

[0041] In this embodiment: through the above arrangement, the slide groove 16 can limit the position of the slider 17, so that the position of the rubber pad 403 and the moving rod 402 can be limited, thereby improving the stability of the first shock absorbing assembly 4 when in use.

[0042] Working principle: first, place the axial flow fan inside the noise reduction cylinder 5, and rotate the moving bolt 14. The moving bolt 14 will drive the arc plate 13 to move downward or upward, so that the arc plate 13 can limit and fix axial flow fans of different sizes. When the axial flow fan is running, it will generate noise, and the noise reduction cylinder 5 will have a sound insulation effect on the noise. When the axial flow fan vibrates, the vibration force will be transmitted to the noise reduction cylinder 5, so that the noise reduction cylinder 5 will drive the moving rod 402 to move. When the moving rod 402 moves, it will drive the rubber pad 403 to squeeze the reset spring 404, and the elastic force in the opposite direction of the reset spring 404 will contact the rubber pad The extrusion forces when 403 moves offset each other, thereby achieving a shock-absorbing effect on the vibration generated. By setting the second shock-absorbing component 6, the noise reduction cylinder 5 will exhibit irregular movement when vibrating, which will drive the mounting seat 15 and the first connecting block 601 to move downward. When the first connecting block 601 moves, it will drive the pressure rod 604 to rotate. When the two pressure rods 604 rotate, they will drive the corresponding extrusion blocks 603 to move in opposite directions. The movement of the extrusion blocks 603 will squeeze the strong springs 605, and the opposite elastic forces of the strong springs 605 will offset the extrusion force when the extrusion blocks 603 move, thereby further improving the shock-absorbing effect.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise reduction device for a fan, comprising a base (1), characterized in that: Both sides of the top of the base (1) are fixedly connected to support plates (2), the opposite sides of the two support plates (2) are fixedly connected to first rotating frames (3), the interior of the first rotating frames (3) is rotatably connected to a first shock absorbing assembly (4), a noise reduction cylinder (5) is arranged between the opposite sides of the two first shock absorbing assemblies (4), and the bottom of the noise reduction cylinder (5) is fixedly connected to a second shock absorbing assembly (6); The first shock absorbing assembly (4) comprises a mounting tube (401), a moving rod (402), a rubber pad (403) and a return spring (404); the moving rod (402) passes through the mounting tube (401) and extends into the interior of the mounting tube (401); the rubber pad (403) is fixedly connected to one end of the moving rod (402) located inside the mounting tube (401); the return spring (404) is sleeved on the surface of the moving rod (402), and one side of the return spring (404) close to the mounting tube (401) and the rubber pad (403) is fixedly connected thereto respectively.

2. A noise reduction device for a fan according to claim 1, characterized in that: The second shock absorbing assembly (6) comprises a first connecting block (601), a second connecting block (602), an extrusion block (603), a pressure rod (604) and a strong spring (605); the second connecting block (602) is fixedly connected to the top of the extrusion block (603); the pressure rod (604) is rotatably connected to the first connecting block (601) and the second connecting block (602) at one side thereof close to the first connecting block (601) and the second connecting block (602); and the strong spring (605) is fixedly connected to the side of the two extrusion blocks (603) away from each other.

3. A noise reduction device for a fan according to claim 1, characterized in that: Connecting ears (7) are fixedly connected to both sides of the surface of the noise reduction cylinder (5); a second rotating frame (8) is fixedly connected to the side of the connecting ear (7) away from the noise reduction cylinder (5); a first rotating member (9) is rotatably connected inside the second rotating frame (8); and a side of the first rotating member (9) close to the moving rod (402) is fixedly connected to the moving rod (402).

4. A noise reduction device for a fan according to claim 1, characterized in that: A second rotating member (10) is fixedly connected to a side of the mounting cylinder (401) away from the noise reduction cylinder (5), and the second rotating member (10) is rotatably connected to the inside of the first rotating frame (3).

5. A noise reduction device for a fan according to claim 2, characterized in that: A fixed block (11) is fixedly connected to the top of the base (1), a limiting rod (12) is fixedly connected between opposite sides of the two fixing blocks (11), the extrusion block (603) is slidably connected to the surface of the limiting rod (12), the strong spring (605) is sleeved on the surface of the limiting rod (12), and the side of the strong spring (605) close to the fixing block (11) is fixedly connected to the fixing block (11).

6. A noise reduction device for a fan according to claim 1, characterized in that: An arc-shaped plate (13) is arranged inside the noise reduction cylinder (5), and a movable bolt (14) is rotatably connected to the top of the arc-shaped plate (13). The movable bolt (14) passes through the noise reduction cylinder (5) and is threadedly connected to the noise reduction cylinder (5).

7. A noise reduction device for a fan according to claim 2, characterized in that: The bottom of the noise reduction cylinder (5) is fixedly connected to a mounting seat (15), the first connection block (601) is fixedly connected to the bottom of the mounting seat (15), and the surface of the mounting seat (15) is made of rubber material.

8. A noise reduction device for a fan according to claim 3, characterized in that: The inner wall of the installation cylinder (401) is provided with a sliding groove (16), the interior of the sliding groove (16) is slidably connected with a sliding block (17), and the sliding block (17) is fixedly connected to the rubber pad (403) on a side close to the rubber pad (403).

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