An automatically tensioned fan belt tensioning mechanism

Abstract

The utility model discloses an automatic tensioning's fan belt tensioning mechanism relates to air conditioner fan technical field. The mechanism includes first pivot, motor, motor mounting panel, first baseplate and adjusting assembly, and the motor is installed on the motor mounting panel, and one end of motor mounting panel is connected with first baseplate through first pivot, and the other end is connected with first baseplate through adjusting assembly, the output of motor is connected with fan through belt drive assembly, when the transmission belt of air conditioner fan runs for a period of time, and transmission belt is deformed and lengthens, now motor mounting panel end close to the end of elastic part under the action of motor and its own gravity moves downward and tightens transmission belt again. The utility model discloses fan belt tensioning mechanism relies on motor and motor mounting panel's own gravity to realize the automatic tensioning of transmission belt, avoids the problem that transmission belt is slack after long -time use, reduces manual maintenance frequency, and saves a large amount of manpower and material resources.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning fan technology, specifically to an automatic tensioning mechanism for fan belts. Background Technology

[0002] In modern living and industrial environments, air conditioning systems have become crucial facilities for maintaining comfortable indoor temperatures and ensuring stable equipment operation. Whether in residential or commercial buildings, or in places with stringent temperature and humidity requirements such as electronic equipment manufacturing workshops and data centers, air conditioning systems bear the heavy responsibility of regulating air temperature, humidity, and ventilation. In the operation of air conditioning systems, the fan, as the core component for achieving air circulation and heat exchange, directly affects the cooling or heating efficiency of the entire system.

[0003] Most air conditioner fans rely on belt drives for power. This transmission method is widely used in the air conditioning manufacturing industry due to its simple structure, low cost, smooth operation, and ability to buffer certain vibrations.

[0004] However, with the continuous operation of air conditioning systems for extended periods, fan belt drives face numerous challenging problems. One particularly serious issue is that the material properties of the belt itself mean that its elasticity gradually diminishes under long-term stretching, bending, and friction with the pulleys, leading to elongation. According to relevant research data, after six months of normal operation, some air conditioning fan belts can elongate by 3%-5% of their initial length. Once the belt loosens, the friction between it and the pulleys becomes unstable, easily causing belt slippage. During the hot summer months, when household air conditioners frequently start to cope with indoor temperatures, a loose or slipping fan belt can cause unstable fan speeds, a significant reduction in airflow from indoor units, and a substantial decrease in cooling efficiency, severely impacting user comfort. In data centers and other locations with extremely high reliability requirements, a slipping central air conditioning fan belt can cause localized overheating, jeopardizing the normal operation of critical equipment such as servers and resulting in substantial economic losses.

[0005] Existing tensioning devices are typically adjusted manually. Maintenance personnel must periodically open the air conditioner casing, use wrenches and other tools to loosen the motor mounting bolts, and adjust the tension screw to tighten the belt. This method is unsuitable for locations with limited space where disassembling the motor mounting bolts is inconvenient, or for locations with specific placement characteristics (e.g., ceiling-mounted units). Furthermore, this method is time-consuming, labor-intensive, and requires a high level of experience and skill from the maintenance personnel. In practice, precisely controlling the belt tension is difficult. Over-tightening can accelerate belt wear, shorten its lifespan, and increase motor load, leading to higher energy consumption; under-tightening fails to address belt slippage. For example, in the maintenance of commercial central air conditioning systems, a large office building may have dozens or even hundreds of air conditioning units. Manually checking and adjusting the belt tension of each unit requires significant manpower and involves a lengthy maintenance cycle, during which the system's operational efficiency is compromised. Utility Model Content

[0006] The main purpose of this utility model is to provide an automatic tensioning mechanism for fan belts to overcome the problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] An automatic tensioning fan belt tensioning mechanism includes a first rotating shaft, a motor, a motor mounting plate, a first base, and an adjusting component. The motor is mounted on the motor mounting plate, one end of the motor mounting plate is connected to the first base via the first rotating shaft, and the other end is connected to the first base via the adjusting component.

[0009] The output end of the motor is connected to the fan via a belt drive assembly. When the drive belt of the air conditioner fan deforms and stretches, the end of the motor mounting plate near the adjustment assembly moves downward under the action of the motor and its own weight to tighten the drive belt again.

[0010] Furthermore, the adjustment assembly includes a second rotating shaft, an adjusting nut, an elastic element, and an adjusting rod. The other end of the motor mounting plate has a sliding groove for the adjusting rod to move. The end of the adjusting rod passes through the sliding groove and is fixedly connected to the second rotating shaft. The second rotating shaft is rotatably connected to the first base. The elastic element is located between the motor mounting plate and the second rotating shaft and is sleeved on the outside of the adjusting rod. The adjusting nut is threaded onto the adjusting rod and connected to the bottom end of the elastic element.

[0011] Furthermore, the elastic element is a weight-reducing spring.

[0012] Furthermore, the groove is an oblong hole formed on the motor mounting plate.

[0013] Furthermore, the upper end of the adjusting rod is provided with a limiting nut, and the bottom surface of the limiting nut is in contact with the top surface of the motor mounting plate.

[0014] Furthermore, the belt drive assembly includes a driving pulley, a drive belt, and a driven pulley. The driving pulley is located at the output end of the motor, and the driven pulley is located at the input end of the fan. The driving pulley is connected to the driven pulley via the drive belt.

[0015] Furthermore, it also includes a second base, on which both the fan and the first base are mounted.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The fan belt tensioning mechanism of this utility model relies on the weight of the motor and motor mounting plate to automatically tension the transmission belt. This avoids the problem of the transmission belt loosening after long-term use, which would make it difficult to maintain stable friction between the belt and the pulley, causing belt slippage and a series of problems caused by reduced transmission efficiency of the fan and motor. This solution can reduce the number of maintenance operations, save a lot of manpower and material resources, and also solve the problem of maintenance personnel having to go to inconvenient locations to perform fan belt tensioning work, thus reducing the maintenance cycle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This utility model Figure 1 Enlarged view of section B in the middle.

[0020] Explanation of reference numerals in the attached drawings: 1. Fan, 2. Driven pulley, 3. Drive belt, 4. Second base, 5. First shaft, 6. Motor, 7. Motor mounting plate, 8. First base, 9. Second shaft, 10. Adjusting nut, 11. Elastic element, 12. Limit nut, 13. Adjusting rod, 14. Drive pulley. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] Combination Figures 1 to 2 This embodiment provides an automatic tensioning fan belt tensioning mechanism, including a fan 1, a driven pulley 2, a transmission belt 3, a second base 4, a first rotating shaft 5, a motor 6, a motor mounting plate 7, a first base 8, a second rotating shaft 9, an adjusting nut 10, an elastic element 11, a limit nut 12, an adjusting rod 13, and a driving pulley 14.

[0023] Among them, the second base 4 is the fan motor base, the first base 8 is the tensioning mechanism base, the first rotating shaft 5 is the tensioning mechanism rotating shaft, and the second rotating shaft 9 is the adjusting rod rotating shaft.

[0024] The fan 1 and the first base 8 are both mounted on the second base 4. The motor 6 is mounted on the motor mounting plate 7. One end of the motor mounting plate 7 is connected to the first base 8 through the first rotating shaft 5, and the other end is connected to the first base 8 through the adjusting component. The output end of the motor 6 is connected to the fan 1 through the belt drive component. When the transmission belt 3 of the air conditioner fan runs for a period of time, the transmission belt 3 deforms and stretches. At this time, the end of the motor mounting plate 7 near the adjusting component moves downward under the action of the motor 6 and its own weight to tighten the transmission belt 3 again.

[0025] The adjustment assembly includes a second rotating shaft 9, an adjusting nut 10, an elastic element 11, and an adjusting rod 13. The other end of the motor mounting plate 7 has a sliding groove for the adjusting rod 13 to move. The end of the adjusting rod 13 passes through the sliding groove and is fixedly connected to the second rotating shaft 9. The second rotating shaft 9 is rotatably connected to the first base 8. The elastic element 11 is located between the motor mounting plate 7 and the second rotating shaft 9 and is sleeved on the outside of the adjusting rod 13. The adjusting nut 10 is threaded onto the adjusting rod 13 and connected to the bottom end of the elastic element 11.

[0026] In this embodiment, the elastic element 11 is a weight-reducing spring.

[0027] In this embodiment, the groove is an oblong hole formed on the motor mounting plate 7.

[0028] In this embodiment, the upper end of the adjusting rod 13 is provided with a limiting nut 12, and the bottom surface of the limiting nut 12 is in contact with the top surface of the motor mounting plate 7.

[0029] In this embodiment, the belt drive assembly includes a drive pulley 14, a drive belt 3, and a driven pulley 2. The drive pulley 14 is located at the output end of the motor 6, and the driven pulley 2 is located at the input end of the fan 1. The drive pulley 14 is connected to the driven pulley 2 via the drive belt 3.

[0030] In practical use, the driven pulley 2 and the driving pulley 14 are respectively installed on the fan shaft and the motor shaft. A suitable weight-reducing spring is selected according to the weight of the motor to reduce problems such as belt breakage caused by excessive belt tension due to excessive weight of the motor 6. The weight-reducing spring is installed on the second rotating shaft 9, and the initial position of the weight-reducing spring is adjusted by adjusting the adjusting nut 10. The first rotating shaft 5, the motor mounting plate 7, the first base 8, and the second rotating shaft 9 are assembled into a tensioning device.

[0031] Then, the device and the fan 1 are installed on the second base 4, the motor 6 is installed on the motor mounting plate 7, and the drive belt 3 is installed.

[0032] Finally, adjust the adjusting nut 10 and the limiting nut 12 to open the motor mounting plate 7 to a suitable angle so that the transmission belt 3 gets a suitable tension and the entire fan belt tensioning mechanism is completed.

[0033] The wind turbine belt tensioning mechanism of this utility model relies on the self-weight of the motor 6 and the motor mounting plate 7 to achieve automatic tensioning. After running for a period of time, the transmission belt 3 deforms and stretches, and the motor mounting plate 7 will descend to tighten the transmission belt 3 again, preventing it from loosening. This makes it difficult to maintain stable friction between the belt and the pulley, causing belt slippage and a series of problems caused by the decrease in the transmission efficiency of the wind turbine motor.

[0034] This solution addresses the issue that after six months of normal operation, some air conditioning fan drive belts can elongate by 3%-5% of their initial length. Once the drive belt loosens, the friction between it and the pulleys becomes unstable, easily leading to belt slippage. It also eliminates the need for maintenance personnel to tension the fan belts in areas where access and operation are difficult, saving significant manpower and resources and reducing maintenance cycles and frequency.

[0035] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An automatic tensioning mechanism for a fan belt, characterized in that, It includes a first rotating shaft (5), a motor (6), a motor mounting plate (7), a first base (8), and an adjustment assembly. The motor (6) is mounted on the motor mounting plate (7). One end of the motor mounting plate (7) is connected to the first base (8) through the first rotating shaft (5), and the other end is connected to the first base (8) through the adjustment assembly. The output end of the motor (6) is connected to the fan (1) through a belt drive assembly. When the transmission belt (3) of the air conditioner fan is deformed and stretched, the end of the motor mounting plate (7) near the adjustment assembly moves downward under the action of the motor (6) and its own gravity to tighten the transmission belt (3) again.

2. The automatic tensioning fan belt tensioning mechanism as described in claim 1, characterized in that, The adjustment assembly includes a second rotating shaft (9), an adjusting nut (10), an elastic element (11), and an adjusting rod (13). The other end of the motor mounting plate (7) has a sliding groove for the adjusting rod (13) to move. The end of the adjusting rod (13) passes through the sliding groove and is fixedly connected to the second rotating shaft (9). The second rotating shaft (9) is rotatably connected to the first base (8). The elastic element (11) is located between the motor mounting plate (7) and the second rotating shaft (9) and is sleeved on the outside of the adjusting rod (13). The adjusting nut (10) is threaded onto the adjusting rod (13) and connected to the bottom end of the elastic element (11).

3. The automatic tensioning fan belt tensioning mechanism as described in claim 2, characterized in that, The elastic element (11) is a weight-reducing spring.

4. The automatic tensioning fan belt tensioning mechanism as described in claim 2, characterized in that, The groove is an oblong hole formed on the motor mounting plate (7).

5. The automatic tensioning mechanism for a fan belt as described in claim 2, characterized in that, The upper end of the adjusting rod (13) is provided with a limiting nut (12), and the bottom surface of the limiting nut (12) is in contact with the top surface of the motor mounting plate (7).

6. The automatic tensioning fan belt tensioning mechanism as described in claim 1, characterized in that, The belt drive assembly includes a drive pulley (14), a drive belt (3), and a driven pulley (2). The drive pulley (14) is located at the output end of the motor (6), and the driven pulley (2) is located at the input end of the fan (1). The drive pulley (14) is connected to the driven pulley (2) through the drive belt (3).

7. The automatic tensioning fan belt tensioning mechanism as described in claim 1, characterized in that, It also includes a second base (4), on which both the fan (1) and the first base (8) are mounted.

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