Fan front cover with adjustable protection effect

Abstract

The utility model relates to the technical field of fan front covers, in particular to a fan front cover with an adjustable protection effect, which comprises a front cover shell, a support frame is arranged on the outer side of the front cover shell, a movable rod is arranged on the support frame, a limiting ring is arranged on the front cover shell, a protection net is movably connected in the limiting ring, and the movable rod is arranged on the movable rod. A base plate is installed on the bottom side of the front cover shell, an arc-shaped piece is movably connected between the base plate and the front cover shell, and a tooth piece is arranged on the bottom side of the arc-shaped piece. According to the scheme, the possibility that a large amount of time needs to be consumed for disassembly and assembly in the process of cleaning dust on the inner side of the front cover is reduced, the cleaning effect can be achieved in the working state of the draught fan, the possibility that the air inlet efficiency is reduced due to sheltering objects is reduced, the rapid cleaning effect of the device is improved, and the service life of the device is prolonged. And the shutdown cleaning time of the fan can be shortened, the air inlet efficiency of the device is also improved, and the size of the air inlet can be adjusted and changed to be suitable for being used in multiple scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of a fan front cover of a blower fan, in particular to a fan front cover of a blower fan with an adjustable protective effect. Background Art

[0002] The fan front cover can effectively prevent the human body or other objects from direct contact with the high-speed rotating fan blades, thereby avoiding possible cutting injuries. In electrical equipment, the fan front cover can also prevent dust, moisture or other foreign matter from entering the fan, reducing safety hazards caused by short circuits.

[0003] During the use of the current fan, a lot of dust will adhere to the inner side of the front cover over a long period of time. The accumulation of dust will affect the size of the wind force. When cleaning, the fan must be disassembled to clean the inside. During cleaning, the fan loses its external protection and cannot be used, affecting work. Moreover, when there is an immovable obstruction on the rear side of the fan, the obstruction will block the amount of air intake, and the wind speed will therefore be greatly reduced, affecting work efficiency. For this reason, a fan front cover with an adjustable protective effect is proposed. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a fan front cover with an adjustable protective effect.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A front cover of a blower fan with an adjustable protective effect comprises a front cover shell, a support frame is installed on the outer side of the front cover shell, a moving rod is arranged on the support frame, a limiting ring is arranged on the front cover shell, a protective net is movably connected inside the limiting ring, a chassis is installed on the bottom side of the front cover shell, an arc-shaped piece is movably connected between the chassis and the front cover shell, a tooth piece is arranged on the bottom side of the arc-shaped piece, and a worm is connected to the outer side of the tooth piece.

[0007] Preferably, an inner ring is fixedly installed on the inner wall surface of the front cover shell, the top surface of the inner ring is lower than the top surface of the front cover shell, a plurality of holes are arranged in a ring on the top surface of the inner ring, a plurality of limit rods are arranged in a ring on the bottom surface of the limit ring, the limit rods are all movably connected in the holes, and a spring is connected between the holes and the limit rods.

[0008] Preferably, rotating shafts are symmetrically installed on both sides of the protective net, the rotating shafts are rotatably connected to the inner wall surface of the limiting ring, the protective net is rotatably connected inside the limiting ring, the protective net and the limiting ring are both connected to the top surface of the inner ring, and the heights of the two are the same.

[0009] Preferably, there are multiple support frames, all of which are fixedly mounted between the front cover shell and the chassis, and a limiting groove is provided on the top surface of the support frame, one end of the limiting groove passes through the inner wall of the front cover shell, and a block is movably connected in the limiting groove, and there are multiple moving rods, all of which are fixedly mounted on the tail ends of multiple blocks, and the moving rod passes through the outside of the limiting groove, and the front end of the block is pressed on the top surface of the limiting ring and the protective net, and the block and the limiting groove are connected by a spring.

[0010] Preferably, a plurality of arc-shaped plates are installed in a ring arrangement, the arc-shaped plates correspond to each other, a central axis is provided in each arc-shaped plate, one end of the central axis is rotatably connected to the bottom surface of the front cover shell, the other end of the central axis passes through the bottom surface of the chassis, and tooth plates are welded and installed thereon, and the tooth plates are meshed with each other.

[0011] Preferably, a shell is installed on one side of the tooth plate, and the shell is fixedly installed on the chassis. A worm is rotatably connected inside the shell, and the worm is meshed with one of the tooth plates. A protective plate is also fixed on the bottom side of the chassis, and the tooth plates are located between the protective plate and the chassis.

[0012] The beneficial effects of the utility model are:

[0013] This solution can achieve rotational adjustment of the protective net by adjusting the limit rod, and will not touch other components during the adjustment process. The position of the protective net and the limit ring can be supported by the block, and the arc plates can be rotated synchronously by the gear plates. The size of the air inlet can be adjusted by the rotation of the arc plates, thereby avoiding the influence of rear obstructions.

[0014] This solution reduces the possibility of consuming a lot of time for disassembly and installation during the process of cleaning dust on the inside of the front cover, and can achieve the effect of cleaning when the fan is in working state, reducing the possibility of reduced air intake efficiency due to obstructions, improving the effect of rapid cleaning of the device, and can reduce the time of shutdown for cleaning of the fan, and also improve the air intake efficiency of the device, and can adjust the size of the air inlet to be suitable for use in multiple scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the fan front cover with adjustable protection effect proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of the fan front cover with adjustable protection effect proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the exploded structure of the fan front cover with adjustable protection effect proposed by the utility model;

[0018] Figure 4 for Figure 3 Partial side view schematic diagram.

[0019] In the figure: 1. front cover shell; 2. support frame; 3. protection net; 4. moving rod; 5. block; 6. arc-shaped piece; 7. protection plate; 8. worm; 9. outer shell; 10. chassis; 11. limit ring; 12. limit rod; 13. socket; 14. tooth piece; 15. inner ring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Example 1: Reference Figure 1-4 The front cover of the fan with adjustable protective effect comprises a front cover shell 1, a support frame 2 is installed on the outer side of the front cover shell 1, a moving rod 4 is arranged on the support frame 2, a limiting ring 11 is arranged on the front cover shell 1, a protective net 3 is movably connected in the limiting ring 11, a chassis 10 is installed on the bottom side of the front cover shell 1, an arc piece 6 is movably connected between the chassis 10 and the front cover shell 1, a tooth piece 14 is arranged on the bottom side of the arc piece 6, a worm 8 is connected to the outer side of the tooth piece 14, and an inner wall surface of the front cover shell 1 is provided with a tooth piece 14. An inner ring 15 is fixedly installed, and the top surface of the inner ring 15 is lower than the top surface of the front cover shell 1. A plurality of holes 13 are provided in a ring shape on the top surface of the inner ring 15. A plurality of limit rods 12 are arranged in a ring shape on the bottom surface of the limit ring 11 to facilitate the stability of the limit ring 11 during lifting and lowering adjustment. The limit rods 12 are all movably connected in the holes 13. A spring is connected between the holes 13 and the limit rods 12 to facilitate automatic pop-up after the block 5 is removed. The bottom side of the limit ring 11 is in an arc shape to facilitate pressing the block 5 outward.

[0022] Specifically, rotating shafts are symmetrically installed on both sides of the protective net 3, and the rotating shafts are rotatably connected to the inner wall surface of the limiting ring 11 to facilitate the protective net 3 to rotate 180 degrees to achieve the effect of changing the surface. The protective net 3 is rotatably connected in the limiting ring 11, and the protective net 3 and the limiting ring 11 are both connected to the top surface of the inner ring 15, and the heights of the two are kept at the same level to facilitate the blocking block 5 to clamp the positions of the protective net 3 and the limiting ring 11 at the same time.

[0023] Furthermore, multiple support frames 2 are provided, all of which are fixedly mounted between the front cover shell 1 and the chassis 10. A limiting groove is provided on the top surface of the support frame 2, one end of the limiting groove penetrates through the inner wall of the front cover shell 1, and a clamping block 5 is movably connected in the limiting groove. Multiple moving rods 4 are provided, all of which are fixedly mounted on the tail ends of multiple clamping blocks 5 for convenient manual adjustment of the position of the moving rod 4. The moving rod 4 penetrates to the outside of the limiting groove, and the front end of the clamping block 5 is pressed on the top surface of the limiting ring 11 and the protective net 3. The clamping block 5 and the limiting groove are spring-connected to achieve the effect of automatic clamping.

[0024] In this embodiment, a plurality of arc-shaped pieces 6 are arranged in a ring, and the positions of the arc-shaped pieces 6 correspond to each other to achieve a completely closed effect. A central axis is provided in each arc-shaped piece 6, and one end of the central axis is rotatably connected to the bottom surface of the front cover shell 1, and the other end of the central axis passes through the bottom surface of the chassis 10, and tooth pieces 14 are welded and installed thereon. The tooth pieces 14 are meshed with each other to enable the arc-shaped pieces 6 to rotate and open and close synchronously. A shell 9 is installed on one side of the tooth piece 14, and the shell 9 is fixedly installed on the chassis 10. A worm 8 is rotatably connected in the shell 9, and the mutual meshing between the worm 8 and one of the tooth pieces 14 can control the rotation accuracy of the arc-shaped piece 6. A protective plate 7 is also fixed on the bottom side of the chassis 10 to prevent the operator from contacting the tooth piece 14, and the tooth piece 14 is located between the protective plate 7 and the chassis 10.

[0025] Working principle: When cleaning is required, move the moving rod 4 outward, the limit rod 12 will pop up under the action of the spring, and then move the limit ring 11 upward, and then turn the protective net 3 to adjust the inner and outer sides, and then press the limit ring 11 downward after the adjustment is completed, the block 5 will fix the position of the protective net 3 and the limit ring 11 again, and then the outside of the protective net 3 can be wiped, and the fan of the fan is turned on after wiping, and the wind will directly blow out the dust that is wiped off, reducing the impact of dust falling;

[0026] When there is an obstruction on the rear side of the blower fan, resulting in reduced air intake efficiency, the worm 8 is rotated. The rotation of the worm 8 drives the gear pieces 14 to rotate. The meshing rotation between the gear pieces 14 will gradually open the arc pieces 6. After opening, part of the gas will enter from between the arc pieces 6, thereby avoiding the influence of the obstruction.

[0027] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0028] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fan front cover with adjustable protection effect, characterized in that: include: A front cover shell (1), wherein a support frame (2) is installed on the outer side of the front cover shell (1), a moving rod (4) is arranged on the support frame (2), a limit ring (11) is arranged on the front cover shell (1), a protective net (3) is movably connected inside the limit ring (11), a chassis (10) is installed on the bottom side of the front cover shell (1), an arc-shaped piece (6) is movably connected between the chassis (10) and the front cover shell (1), a tooth piece (14) is arranged on the bottom side of the arc-shaped piece (6), and a worm (8) is connected to the outer side of the tooth piece (14).

2. The fan front cover with adjustable protection effect according to claim 1, characterized in that: An inner ring (15) is fixedly mounted on the inner wall surface of the front cover shell (1), the top surface of the inner ring (15) is lower than the top surface of the front cover shell (1), a plurality of insertion holes (13) are arranged in a ring on the top surface of the inner ring (15), a plurality of limiting rods (12) are arranged in a ring on the bottom surface of the limiting ring (11), the limiting rods (12) are movably connected in the insertion holes (13), and a spring is connected between the insertion holes (13) and the limiting rods (12).

3. The fan front cover with adjustable protection effect according to claim 2, characterized in that: Rotating shafts are symmetrically mounted on both sides of the protection net (3), the rotating shafts are rotatably connected to the inner wall surface of the limiting ring (11), the protection net (3) is rotatably connected inside the limiting ring (11), the protection net (3) and the limiting ring (11) are both connected to the top surface of the inner ring (15), and the heights of the two are the same.

4. The fan front cover with adjustable protection effect according to claim 1, characterized in that: The support frames (2) are provided in plurality and are all fixedly mounted between the front cover shell (1) and the chassis (10). A limiting groove is provided on the top surface of each support frame (2). One end of the limiting groove penetrates the inner wall of the front cover shell (1). A clamping block (5) is movably connected in the limiting groove. The moving rods (4) are provided in plurality and are all fixedly mounted on the tail ends of the plurality of clamping blocks (5). The moving rods (4) penetrate the outer sides of the limiting groove. The front end of the clamping block (5) is pressed on the limiting ring (11) and the top surface of the protective net (3). The clamping block (5) and the limiting groove are connected in a spring manner.

5. The fan front cover with adjustable protection effect according to claim 1, characterized in that: A plurality of arc-shaped pieces (6) are arranged in a ring and correspond to each other. A central axis is provided in each of the arc-shaped pieces (6). One end of the central axis is rotatably connected to the bottom surface of the front cover shell (1). The other end of the central axis passes through the bottom surface of the chassis (10) and is welded with tooth pieces (14). The tooth pieces (14) are meshed with each other.

6. The fan front cover with adjustable protection effect according to claim 5, characterized in that: A housing (9) is installed on one side of the tooth piece (14), the housing (9) is fixedly installed on the chassis (10), a worm (8) is rotatably connected inside the housing (9), the worm (8) and one of the tooth pieces (14) are meshed with each other, a protective plate (7) is also fixed on the bottom side of the chassis (10), and the tooth pieces (14) are located between the protective plate (7) and the chassis (10).

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