Transmission device of fan

Abstract

The utility model belongs to the technical field of fans, and discloses a transmission device of a fan, which comprises a fan cover, a power shaft is rotatably mounted in the middle of the fan cover, an elastic component is fixedly mounted on the lower end face in the fan cover close to the edge, and a motor is fixedly mounted at the movable end of the elastic component. The power output end of the motor is in transmission connection with the power shaft; the fan transmission device is simple in overall structure, the stability and reliability of the fan transmission device can be improved, the maintenance cost and workload of equipment are reduced, and the using effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan technical field, specifically relates to a transmission device of fan. BACKGROUND

[0002] As a kind of widely used in livestock breeding, ventilation duct and other places air supply device, its core function is to drive impeller rotation by power shaft, to realize the delivery of gas.Fan transmission device as the key component connecting power source and impeller, its performance directly affects the overall operation efficiency and stability of fan.In traditional fan transmission device, belt drive is widely used in various fan equipment due to its simple structure, low cost, easy installation and maintenance and other advantages.However, with the growth of using time, belt drive system gradually exposes some problems to be solved, among which belt slackening phenomenon is particularly prominent.

[0003] Belt as the core component of belt drive system, inevitably will have elastic deformation and wear in long-term operation process.Especially in fan equipment, due to complex and changeable working environment, such as temperature fluctuation, vibration impact and other factors, the aging speed of belt will be further accelerated.When the pre-tension of belt is too small, its friction will decrease significantly, leading to belt slipping phenomenon in transmission process.Slipping not only reduces transmission efficiency, but also causes severe friction between belt and pulley, accelerates the wear and aging of belt, eventually forms vicious cycle, makes belt slackening problem more serious.

[0004] For the problem of belt slackening, the existing technology usually adopts adjusting center distance or installing tension pulley to solve the problem.However, these methods have certain limitations in practical application.For example, adjusting center distance needs to disassemble equipment and reinstall, which is tedious and inefficient, while tension pulley can alleviate the problem of belt slackening to some extent, but needs regular maintenance and adjustment, which increases the maintenance cost and workload of equipment.In addition, the installation position and adjustment accuracy of tension pulley will also affect its use effect, if installed improperly or adjusted inaccurately, it may even exacerbate the wear and aging of belt. UTILITY MODEL CONTENTS

[0005] The main technical problem to be solved by the utility model is to provide a fan transmission device with simple overall structure, which can automatically tension and adjust transmission belt during fan use, improve the stability and reliability of fan transmission device, reduce the maintenance cost and workload of equipment, and improve the use effect.

[0006] To solve the above technical problems, the utility model provides the following technical scheme:

[0007] The utility model provides a transmission device of a fan, including fan cover, power shaft is rotatably installed at the middle position of fan cover, and the active end of the elastic component fixedly installed on the lower end face of the inside of fan cover is close to the edge position, and the motor fixedly installed on the active end of elastic component, and the power output end of motor is transmission connection with power shaft.

[0008] The utility model discloses the further optimization of the above technical scheme:

[0009] The fan cover includes a bottom plate, side plates vertically arranged on both sides of the length direction of the bottom plate, and a top plate fixedly installed on the upper end of the two side plates.

[0010] Further optimization: the bottom plate, the two side plates and the top plate form a frame, a back plate is fixedly installed on one side of the frame, an avoiding hole is formed in the middle position of the back plate, a protective net is fixedly installed on the surface of the back plate corresponding to the avoiding hole, and a support frame is fixedly installed on the protective net.

[0011] Further optimization: a rotating bearing is fixedly installed in the middle position of the support frame, and the rotating bearing penetrates through the protective net.

[0012] Further optimization: the power shaft is fixedly installed on the middle hole wall of the rotating bearing.

[0013] Further optimization: a connecting shaft is vertically arranged on one end surface of the power shaft, and a first belt pulley is fixedly installed on the outer surface of the connecting shaft.

[0014] Further optimization: a second belt pulley is fixedly installed on the power output end of the motor after penetrating through the back plate and the protective net.

[0015] Further optimization: the elastic component includes a fixed plate fixedly installed on the bottom plate, two second sleeves spaced apart and fixedly installed on one end surface of the power shaft close to the fixed plate, and a plurality of springs linearly arranged on the other end position of the fixed plate.

[0016] Further optimization: a rotating plate is rotatably connected to the second sleeve, two first sleeves spaced apart and fixedly installed on one end of the rotating plate close to the second sleeve, and the other end of the plurality of springs is fixedly installed on one side of the rotating plate close to the fixed plate.

[0017] Further optimization: the two first sleeves and the two second sleeves are staggered, and the same hinge shaft is inserted into the middle holes of the two first sleeves and the two second sleeves.

[0018] The utility model adopts the above technical scheme, and has the advantages of ingenious conception and reasonable structure, can ensure that the belt is in tension state in the transmission during the operation of the fan, automatically adjusts the tension when the belt is loose after long-time use, reduces the maintenance intensity in the application of the fan, prolongs the service life of the belt, and reduces the use cost.

[0019] During use, by setting springs, multiple springs are initially in a stretched state. If the belt drive becomes loose, the tension of the springs pulls the rotating plate to rotate away from the power shaft, thereby automatically ensuring that the belt is tensioned again, achieving automatic adjustment and improving the stability and reliability of the fan drive device.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure from another perspective in an embodiment of this utility model;

[0023] Figure 3 This is an embodiment of the present utility model. Figure 2 Schematic diagram of the structure at point A in the middle;

[0024] Figure 4 This is a schematic diagram of the rear structure of the overall structure in an embodiment of this utility model.

[0025] In the diagram: 1. Fan cover; 11. Side plate; 12. Top plate; 13. Back plate; 14. Clearance hole; 15. Protective net; 16. Support frame; 17. Base plate; 2. Rotating bearing; 3. Power shaft; 4. First pulley; 5. Second pulley; 6. Motor; 7. Elastic component; 71. Rotating plate; 710. First rotating sleeve; 72. Hinge shaft; 73. Fixed plate; 730. Second rotating sleeve; 74. Spring. Detailed Implementation

[0026] like Figures 1-4 As shown: A transmission device for a fan includes a fan cover 1, a power shaft 3 is rotatably mounted at the middle position of the fan cover 1, an elastic component 7 is fixedly mounted at the lower end face of the fan cover 1 near the edge, a motor 6 is fixedly mounted on the movable end of the elastic component 7, and the power output end of the motor 6 is connected to the power shaft 3 for transmission.

[0027] The fan cover 1 includes a base plate 17, and side plates 11 are vertically arranged on both sides of the base plate 17 along its length, with the two side plates 11 arranged symmetrically.

[0028] The same top plate 12 is fixedly installed on the upper ends of the two side plates 11.

[0029] With this design, the base plate 17, the two side plates 11, and the top plate 12 form a frame.

[0030] The frame is fixedly installed with a back plate 13, an avoiding hole 14 is arranged at the middle position of the back plate 13, and a protective net 15 is fixedly installed at the surface of the back plate 13 and the position corresponding to the avoiding hole 14.

[0031] The protective net 15 is fixedly installed with a supporting frame 16, and the supporting frame 16 can reinforce the overall strength of the fan cover 1.

[0032] The supporting frame 16 is fixedly installed with a rotating bearing 2 at the middle position, and the rotating bearing 2 penetrates the protective net 15.

[0033] In the embodiment, the rotating bearing 2 is a waterproof design special for double-row bearings, has high strength and low noise, and can be obtained in the market.

[0034] The power shaft 3 is fixedly installed on the middle hole wall of the rotating bearing 2, so that the power shaft 3 rotates in the rotating bearing 2.

[0035] As shown in the figure, Figure 4 A connecting shaft is vertically arranged on one end surface of the power shaft 3, and a first belt pulley 4 is fixedly installed on the outer surface of the connecting shaft.

[0036] The power output end of the motor 6 extends in the same direction as the connecting shaft.

[0037] The power output end of the motor 6 penetrates the back plate 13 and the protective net 15 and is fixedly installed with a second belt pulley 5.

[0038] The first belt pulley 4 and the second belt pulley 5 are connected by a belt to realize transmission, which is not marked in the figure.

[0039] In the embodiment, the motor 6, the first belt pulley 4, the second belt pulley 5 and the belt can be obtained in the market.

[0040] The power shaft 3 is close to the other end of the outer surface and has a ring array of fan blades, which is not marked in the figure. In the embodiment, the fan blades are made of stainless steel stamping to ensure large air volume, no deformation and no rupture. The specific installation and structure of the fan blades are known in the prior art, and will not be described here.

[0041] The elastic component 7 is located at the right position of the bottom plate 17.

[0042] As shown in the figure, Figure 3 The elastic component 7 includes a fixed plate 73 fixedly installed on the bottom plate 17.

[0043] Two second sleeves 730 spaced apart are fixedly installed on the fixed plate 73 close to one end surface of the power shaft 3, and a plurality of springs 74 are linearly arranged on the fixed plate 73 close to the other end position.

[0044] The rotating plate 71 is rotatably connected with the second sleeve 730.

[0045] The rotating plate 71 is rotatably connected with the second sleeve 730.

[0046] The two first sleeves 710 and the two second sleeves 730 are cross arranged.

[0047] In use, the first pulley 4 and the second pulley 5 are connected through a belt, at this time, the state of the plurality of springs 74 is ensured to be in a stretched state, the motor 6 is started, the power output end of the motor 6 drives the second pulley 5 to rotate, under the action of the belt transmission, the first pulley 4 rotates, drives the power shaft 3 and the fan blade to rotate, due to the elastic force of the spring 74, the rotating plate 71 and the motor 6 are driven to rotate around the hinge shaft 72 away from the first pulley 4, so that the belt can be kept in a stretched and tensioned state, if the belt is loose after long time use, the spring 74 makes the belt continue to be tensioned, avoids manual adjustment, reduces the maintenance degree, and operation is convenient.

[0048] For those skilled in the art, according to the teaching of the present application, the changes, modifications, replacements and deformations of the embodiments without departing from the principles and spirits of the present application still fall into the protection scope of the present application.

Claims

1. A transmission device for a fan, comprising a fan cover (1), characterized in that: A power shaft (3) is rotatably installed in the middle of the fan cover (1). An elastic component (7) is fixedly installed on the lower end face of the fan cover (1) near the edge. A motor (6) is fixedly installed on the movable end of the elastic component (7). The power output end of the motor (6) is connected to the power shaft (3) for transmission.

2. The transmission device for a fan according to claim 1, characterized in that: The fan cover (1) includes a base plate (17), and side plates (11) are vertically arranged on both sides of the base plate (17) along its length. The same top plate (12) is fixedly installed on the upper end of the two side plates (11).

3. The transmission device for a fan according to claim 2, characterized in that: The bottom plate (17), two side plates (11) and the top plate (12) form a frame. A back plate (13) is fixedly installed on one side of the frame. An avoidance hole (14) is provided in the middle of the back plate (13). A protective net (15) is fixedly installed on the surface of the back plate (13) at the position corresponding to the avoidance hole (14). A support frame (16) is fixedly installed on the protective net (15).

4. The transmission device for a fan according to claim 3, characterized in that: A rotating bearing (2) is fixedly installed in the middle of the support frame (16), and the rotating bearing (2) passes through the protective net (15).

5. The transmission device for a fan according to claim 4, characterized in that: The power shaft (3) is fixedly installed on the middle hole wall of the rotating bearing (2).

6. The transmission device for a fan according to claim 5, characterized in that: A connecting shaft is vertically arranged on one end face of the power shaft (3), and a first pulley (4) is fixedly installed on the outer surface of the connecting shaft.

7. The transmission device for a fan according to claim 6, characterized in that: The power output end of the motor (6) passes through the back plate (13) and the guard net (15) and is fixedly installed with a second pulley (5).

8. The transmission device for a fan according to claim 7, characterized in that: The elastic component (7) includes a fixed plate (73) fixedly installed on the base plate (17). Two second rotating sleeves (730) are fixedly installed on the fixed plate (73) near one end of the power shaft (3) at intervals. Multiple springs (74) are linearly arrayed on the fixed plate (73) near the other end.

9. The transmission device for a fan according to claim 8, characterized in that: The second rotating sleeve (730) is rotatably connected to a rotating plate (71). Two first rotating sleeves (710) are fixedly installed at one end of the rotating plate (71) near the second rotating sleeve (730). The other ends of multiple springs (74) are fixedly installed on the side of the rotating plate (71) near the fixed plate (73).

10. A transmission device for a fan according to claim 9, characterized in that: Two first rotating sleeves (710) and two second rotating sleeves (730) are arranged alternately, and the same hinge shaft (72) is inserted into the middle hole of the two first rotating sleeves (710) and the two second rotating sleeves (730).

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