TWM479353U - Wind turbine device with decelerating mechanism - Google Patents

Description

Fan device with speed reduction mechanism

The present invention relates to a fan device with a speed reduction mechanism, in particular to a speed reduction mechanism using a plurality of gear combinations with different pitch circle radii, so that the output gear speed is lower than the input gear speed, thereby increasing the output shaft torque. The high efficiency ventilator device for its efficacy.

According to the traditional single-suction centrifugal fan, double-suction centrifugal fan, van-wing axial fan (VAF) or wall fan, the impeller located in the fan is driven by the driving motor. Rotating to pump the airflow in the confined space, the outside air is mainly entered through the air inlet of the fan, and then discharged by the air outlet to generate the airflow, effectively achieving the main purpose of air exchange between the confined space and the outside; Ventilation and venting equipment are required for industrial manufacturing processes, commercial buildings, general homes, and road tunnels. Therefore, ventilators are important devices for regulating indoor air and maintaining air circulation.

The traditional ventilator mostly uses the driving motor to drive the pulley to run, and then the belt is connected to the impeller blade to drive the rotation of the ventilator to meet the needs of ambient ventilation and exhaust. In the past patents, many studies have been used. An example in which the drive motor drives the pulley to operate, which in turn drives the fan to rotate, such as the Republic of China Patent Notice M322477 "Industrial exhaust fan structure improvement" is to expose an exhaust fan for industrial use, mainly comprising a motor integrated with an inner casing and an outer casing, wherein the inner and outer casings are provided with large-diameter driving gears and interlocking gears. The driven gear is meshed with the gear of the motor shaft, and the driven gear has a rotating shaft to expose the outer casing, so as to form a rotation speed of the high-speed motor at an appropriate rotation speed and increase the torque; however, the pulley-driven ventilation is used. After the machine is running for a period of time, there are often shortcomings of displacement and need to be corrected for shutdown. In severe cases, the belt may be loose or broken, which may affect the damage of the fan impeller and the danger of overheating the drive motor. In addition, if the fan is ventilated After stopping the operation for a period of time, the pulley also has the disadvantage of being easily hardened and falling off; furthermore, since the pulley is large in volume, it needs to be disposed outside the ventilator, which easily causes the overall ventilator to occupy an excessive space, resulting in manufacturing cost. Increase; in addition, when factory employees, residential tenants or passers-by are exposed to the belt for a long time Under the great noise of starting and running, the hearing will directly affect the hearing; therefore, the overall volume of the ventilator is effectively reduced without wasting space, and the noise pollution is reduced to meet the norm of urban environmental noise, thereby driving the drive. The performance of the motor to achieve energy saving and carbon reduction is still an important issue that needs to be continuously solved and solved by equipment developers or researchers such as ventilation and exhaust fans.

The reason is that the creator, in view of this, and with his rich professional knowledge and years of practical experience, has improved and created a fan unit with a speed reduction mechanism, the purpose of which is to provide a plurality of different pitch radius Gear combination reducer So that the output gear speed is lower than the input gear speed, and then achieve the high efficiency ventilator to improve the output shaft torque effect, in order to increase the ventilation and exhaust volume of the overall turbine, which has reduced ventilation volume and increased bearing use. The longevity, as well as the reduction of noise pollution to meet the requirements of the city's environmental protection regulations, can effectively increase the efficiency of the high-speed drive motor and save power consumption of the device.

In order to achieve the above-mentioned implementation purpose, the present author proposes a fan device with a speed reduction mechanism, which mainly utilizes a gear combination in a speed reduction mechanism to achieve a high-efficiency ventilator device for increasing the torque, and the fan device with the speed reduction mechanism includes a cylinder a housing, a high-speed drive motor, a speed reduction mechanism, and at least one fan; the cylindrical housing is internally formed with a first accommodating space, wherein the cylindrical housing surface is provided with a first air outlet, and the two ends are corresponding to each a first air inlet is provided; the high speed drive motor is disposed in the first accommodating space of the cylindrical housing, wherein one end of the high speed drive motor is provided with a motor rotor; the speed reduction mechanism is corresponding to the high speed drive motor and is accommodated in the first In a accommodating space, the speed reduction mechanism includes a reduction housing and a reduction gear set, wherein the reduction gear set is disposed in the second accommodating space inside the reduction housing; at least one fan corresponds to the first air inlet and The utility model is disposed in the first accommodating space to cover the high speed drive motor and the speed reduction mechanism, wherein at least one of the fan system and the reduction gear set Pinion shaft bearing disposed on the same impeller, the impeller system to a plurality of first bearing holder is screwed to the first air inlet of the cylinder housing.

In an embodiment of the present invention, the reduction gear set includes a first gear disposed on the rotor of the motor, a driven gear, and a driven gear disposed on the a second gear module of the driving gear of the same gear bearing, and a third gear, the first gear system is correspondingly engaged with the driven gear of the second gear module, and the driving gear of the second gear module is correspondingly engaged with the third gear The gear transmits the power outputted by the high-speed drive motor to the third gear through the first gear to the third gear, and the third gear is disposed on the same impeller bearing.

In an embodiment of the present invention, a second bracket may be further disposed on the outer side of the cylindrical casing, and a second air outlet is disposed on one surface of the corresponding first air outlet, and the outer surface is covered with an outer cover body, wherein The surface of the outer cover body is provided with a plurality of second air inlets.

In an embodiment of the present invention, the deceleration housing may further be provided with a butter filling port for the user to fill the tallow to lubricate the reduction gear set.

In an embodiment of the present invention, the pitch radius of the driven gear of the second gear module is greater than the first gear, and the pitch radius of the third gear is greater than the driving gear of the second gear module, and the driven The pitch radius ratio of the gear to the first gear is 4:1, and the pitch radius ratio of the third gear to the drive gear is 2.5:1; however, it must be noted that the number of gears included in the reduction gear set is The pitch radius ratio of each gear is for convenience of description, and is not limited to the scope of the present invention, and those skilled in the art know that the ratio of different gear numbers to different gear pitch radius will be different. The torque output does not affect the actual implementation of this creation.

In one embodiment of the present invention, the high speed drive motor is screwed to the deceleration housing by a plurality of screws, and the deceleration housing is screwed to the inner side of the cylindrical housing with a tripod.

In an embodiment of the present invention, the type of the fan may be one of a single-suction centrifugal fan, a double-suction centrifugal fan, and a moving-wing axial fan; however, it must be noted that the type of the fan is It is for convenience of explanation, not limited to the scope of this creation, and those skilled in the art know that different fan types will have different air volume output, and will not affect the actual implementation of the creation.

Therefore, the creation system is a speed reduction mechanism formed by a plurality of gear combinations with different pitch circle radii, so that the output gear speed is lower than the input gear speed, thereby improving the output shaft torque effect, thereby increasing the overall ventilation. The ventilation and exhaust air volume of the machine; in addition, the design of the gear combination of the built-in speed reduction mechanism replaces the shortcomings of the traditional fan using the belt and the pulley drive, which can effectively reduce the noise pollution when the pulley starts, and indeed meets the urban The environmental noise standard and the advantages of sustainable development; in addition, this creation can reduce the motor starting current by the start of the speed reduction mechanism, and the horsepower of the starting can also be reduced from the seven horsepower of the inductive electric to the better implementation of the creation. For example, the three horsepower of the high-speed drive motor can effectively achieve the advantages of energy saving and carbon reduction. In succession, the creation is made by modularizing the speed reduction mechanism, and the gears or bearings in the speed reduction mechanism can be separately replaced to effectively reduce the speed reduction mechanism and The maintenance cost and price of the overall fan; in addition, the creation of the high-speed drive motor and speed reduction mechanism The inside of the machine can effectively reduce the overall volume of the fan, and it is beneficial to install the fan device with the speed reduction mechanism in a space with insufficient space to effectively reduce the unnecessary waste of the external space. Moreover, the creation is driven by the gear of the speed reduction mechanism. The combined design makes the ventilation and exhaust air volume of the fan unit with the speed reduction mechanism reach the performance and efficiency that cannot be achieved by the general inductive electric motor, and 50% of low power consumption can achieve the same ventilation and exhaust air volume as traditional fans, effectively achieving the full use of energy; finally, the creation is based on the user's needs on the outside of the fan unit with a speed reduction mechanism The bracket is provided with a cover body in addition to one side of the air outlet, wherein any surface of the outer cover body may be further provided with a plurality of second air inlets to provide outside air into the fan with the speed reduction mechanism. The passage of the device has the advantages of being aesthetically pleasing and protecting the fan device with the speed reduction mechanism.

(1) ‧‧‧Cylindrical housing

(11)‧‧‧First accommodation space

(12) ‧‧‧First air outlet

(13) ‧‧‧ first air inlet

(14) ‧‧‧second bracket

(2)‧‧‧High speed drive motor

(21)‧‧‧Motor rotor

(22)‧‧‧ screws

(3) ‧‧‧Speed reduction mechanism

(31)‧‧‧Deceleration housing

(311)‧‧‧Second accommodation space

(32)‧‧‧Reduction gear set

(321)‧‧‧First gear

(322)‧‧‧Second gear module

(3221)‧‧‧ driven gear

(3222)‧‧‧ Gear Bearings

(3223)‧‧‧Drive gear

(323)‧‧‧ Third gear

(4) ‧‧‧Fan

(41)‧‧‧impeller bearings

(411)‧‧‧First bracket

(5) ‧ ‧ outer cover

(51) ‧‧‧second air outlet

(52) ‧‧‧second air inlet

(6) ‧‧‧ butter filling port

(7) ‧‧ ‧ tripod

The first figure: the overall structure of the first preferred embodiment of the fan device with the speed reduction mechanism

The second figure: the fan installation diagram of the first preferred embodiment of the fan device with the speed reduction mechanism

Fig. 3 is a sectional view showing the motor and the speed reduction mechanism of the first preferred embodiment of the fan device with the speed reduction mechanism

Fourth: Schematic diagram of the reduction gear set of the first preferred embodiment of the fan device with the speed reduction mechanism

Fig. 5 is a schematic view showing the outer cover of the first preferred embodiment of the fan device with the speed reduction mechanism

Figure 6 is a schematic view showing the overall structure of the second preferred embodiment of the fan unit with the speed reduction mechanism

Figure 7 is a schematic view showing the overall structure of the third preferred embodiment of the fan device with the speed reduction mechanism

Figure 8: Schematic diagram of the fan installation of the third preferred embodiment of the fan device with the speed reduction mechanism

The purpose of this creation and its structural and functional advantages will be explained in accordance with the structure shown in the following figure, in conjunction with specific examples, so that the review committee can have a deeper and more specific understanding of the creation.

First, please refer to the first figure, which is a schematic diagram of the overall structure of the first preferred embodiment of the fan device with the speed reduction mechanism, wherein the preferred embodiment of the fan device with the speed reduction mechanism is a double suction centrifugal The structure of the fan; the fan device with the speed reduction mechanism of the present invention mainly uses the gear combination in the speed reduction mechanism to achieve a high-efficiency ventilator device for increasing the torque, mainly comprising: a cylindrical casing (1), which is tied to A first accommodating space (11) is formed in the interior, wherein a first air outlet (12) is disposed on the surface of the cylindrical casing (1), and a first air inlet (13) is disposed at each end; a high speed drive The motor (2) is disposed in the first accommodating space (11) of the cylindrical casing (1), wherein one end of the high-speed driving motor (2) is provided with a motor rotor (21); a speed reducing mechanism (3) Corresponding to the high-speed drive motor (2) and housed in the first accommodating space (11), the speed reduction mechanism (3) includes a reduction housing (31) and a reduction gear set (32), wherein the reduction The gear set (32) is disposed in the second accommodating space (311) inside the reduction housing (31); At least one fan (4) corresponding to the first air inlet (13) and disposed in the first receiving space (11) to cover the high speed driving motor (2) and the speed reducing mechanism (3), wherein at least one fan ( 4) One of the gear shafts of the reduction gear set (32) is disposed on the same impeller bearing (41), and the impeller bearing (41) is screwed to the cylindrical housing by a plurality of first brackets (411) (1) The first air inlet (13); please refer to the second figure, which is a schematic diagram of the fan installation of the first preferred embodiment of the fan device with the speed reduction mechanism. In the preferred embodiment of the present invention, The fan (4) is disposed on both sides of the speed reducing mechanism (3) and is axially disposed on the same impeller bearing (41) to form a double suction centrifugal fan.

In addition, the reduction gear set (32) includes a first gear (321) having a shaft disposed on the motor rotor (21), a driven gear (3221), and a driven gear (3221) disposed on the same gear bearing ( 3222) a second gear module (322) of the driving gear (3223), and a third gear (323), the first gear (321) corresponding to the driven gear of the second gear module (322) ( 3221), the driving gear (3223) of the second gear module (322) is correspondingly engaged with the third gear (323), so that the power output by the high-speed driving motor (2) is sequentially first through the motor rotor (21). The gear (321) is transmitted to the third gear (323) and output by the third gear (323), wherein at least one of the fan (4) and the third gear (323) are axially disposed on the same impeller bearing (41); Referring to the third and fourth figures, the cross-sectional view of the motor and the speed reduction mechanism and the reduction gear set structure of the first preferred embodiment of the fan device with the speed reduction mechanism are The schematic diagram, wherein the driven gear (3221) of the second gear module (322) has a pitch radius greater than the first gear (321), and the third gear (323) has a pitch radius greater than the second gear module ( a driving gear (3223) of 322), wherein a ratio of a pitch radius of the driven gear (3221) to the first gear (321) is 4:1, and a pitch of the third gear (323) and the driving gear (3223) The radius ratio is 2.5:1. In the preferred embodiment of the present invention, the pitch radius of the first gear (321) is 0.4 cm, and the driven gear (3221) of the second gear module (322) The radius of the circle is 1.6 cm, the pitch radius of the drive gear (3223) of the second gear module (322) is 0.8 cm, and the pitch radius of the third gear (323) is 2 cm, assuming gear meshing operation When there is no loss of energy, when the motor rotor (21) of the high-speed drive motor (2) drives the first gear (321) to rotate four times, the driven gear (3221) that meshes with it rotates one turn. The rotation speed is reduced by 1/4 times, and the torque is increased by 4 times. Since the driven gear (3221) and the driving gear (3223) are gears that use the same gear bearing (3222), they are driven. When the wheel (3221) is rotated 2.5 times, the driving gear (3223) is also rotated by 2.5 turns, which will drive the third gear (323) to rotate one turn, and the torque is increased by 2.5 times. Therefore, the preferred implementation of the present invention is achieved. In the example, when the first gear (321) rotates at 7,200 rpm, as described above, the third gear (323) is decelerated to 720 rpm, and the speed is reduced by 1/10 times. Torque The increase of 10 times can effectively achieve the reduction gear set (32) in the preferred embodiment of the present invention. After the four gears meshed with each other to transmit power, the rotation speed of the output shaft is reduced, thereby improving the torque of the output shaft; however, it must be noted that the number of gears of the reduction gear set (32) and the pitch of each gear The radius, the ratio of the radius between the gears, and the speed per minute are all for the convenience of description, not limited to the scope of the creation, and the skilled person knows the different gear numbers and different gear pitch circles. Radius, and different gear speed ratios will have different torque output, and will not affect the actual implementation of this creation. The equivalent changes or modifications made by it should be considered as not falling out of the design scope of this creation.

Furthermore, a second bracket (14) may be further disposed on the outer side of the cylindrical casing (1), and a second air outlet (51) is disposed on one side of the first air outlet (12), and the other surface is covered. The outer cover body (5), wherein the surface of the outer cover body (5) is provided with a plurality of second air inlets (52); as shown in the fifth figure, the first preferred fan device for the speed reduction mechanism is created. The outer cover of the embodiment is arranged in a schematic manner, wherein a plurality of second air inlets (52) disposed on the side of the outer cover body (5) provide passage for outside air to enter the fan device with the speed reduction mechanism, however, it must be noted that The position of the second air inlet (52) on the side of the outer cover (5) is for convenience of description, and is not limited to the scope of the present invention, and the skilled person knows the different second air inlets ( 52) The set position is to provide the passage of outside air into the fan unit with the speed reduction mechanism, and does not affect the actual implementation of the creation.

In addition, the deceleration housing (31) may further be provided with a butter filling port (6) for the user to fill the fat to lubricate the reduction gear set (32).

Furthermore, the high speed drive motor (2) is screwed to the reduction housing (31) by a plurality of screws (22), and the reduction housing (31) is screwed to the cylindrical housing by a tripod (7). 1) Inside.

In addition, the type of the fan (4) may be one of a single-suction centrifugal fan, a double-suction centrifugal fan, and a moving-wing axial fan; as shown in the sixth figure, the gear reduction mechanism is A schematic diagram of the overall structure of the second preferred embodiment of the fan device, wherein the fan device with the speed reduction mechanism is provided with a single fan (4) structure to form a single-suction centrifugal fan structure, and the single fan (4) also corresponds to the first An air inlet (13) is disposed in the first accommodating space (11), and covers the high speed driving motor (2) and the speed reducing mechanism (3), and the third gear (323) is axially disposed on an impeller bearing ( 41) above; please refer to the seventh and eighth figures, which is a schematic diagram of the overall structure of the third preferred embodiment of the fan device with the speed reduction mechanism and the fan installation diagram, wherein the structure of the fan (4) is two The same airfoil axial flow fan is formed by an impeller to form a moving wing type axial flow fan. The fan (4) also corresponds to the first air inlet (13) and is disposed in the first accommodating space (11). And covering the high speed drive motor (2) and the speed reduction mechanism (3), and the third gear (323) shaft On the same impeller bearing (41); however, it must be noted that the types of fans (4) of the above three preferred embodiments are for convenience of description, and are not limited by the present invention, and those skilled in the art will know Different types of fans (4) will have different air volume output, and will not affect the actual implementation of this creation.

According to the above-mentioned fan device with a speed reduction mechanism, when the first preferred embodiment of the fan device of the present invention has been applied to a place with ventilation or exhausting requirements, such as an industrial plant, an industrial manufacturing process, For commercial buildings, general homes, or highway tunnels, the user must first activate the power supply of the fan unit with the speed reduction mechanism, and the high speed drive inside the first housing space (11) of the cylindrical housing (1). The motor (2) starts to operate, and the motor rotor (21) embedded in the high-speed drive motor (2) is driven to rotate. At this time, the first part of the speed reduction casing (31) provided in the speed reduction mechanism (3) The gear (321) is disposed on the motor rotor (21), so the rotating motor rotor (21) drives the first gear (321) to operate, and the first gear (321) is correspondingly engaged with the second gear module. (322) the driven gear (3221), the driving gear (3223) of the second gear module (322) is correspondingly engaged with the third gear (323), and the driven gear of the second gear module (322) ( 3221) and the driving gear (3223) shaft is set on the same gear bearing (3222), then the driven gear (3221) and The driving gear (3223) will run at the same speed. Therefore, the power output by the high-speed driving motor (2) is transmitted from the first gear (321) to the motor rotor (21) through the meshing of the gears. The third gear (323) is finally outputted by the third gear (323) to at least one fan (4) of the same impeller bearing (41) to drive the fan (4); In a preferred embodiment, the pitch radius of the first gear (321) is 0.4 cm, and the pitch radius of the driven gear (3221) of the second gear module (322) is 1.6 cm, second. The pitch radius of the drive gear (3223) of the gear module (322) is 0.8 cm, and the pitch radius of the third gear (323) is 2 cm, assuming that there is no energy loss when the gear meshes, When the motor rotor (21) of the high-speed drive motor (2) drives the first gear (321) to rotate four times, the driven gear (3221) that meshes with it rotates one revolution, and the rotation speed is reduced by 1/4 times. The torque is increased by a factor of four, and since the driven gear (3221) and the driving gear (3223) are gears that use the same gear bearing (3222), when the driven gear (3221) is rotated 2.5 turns, the driving gear ( 3223) The corresponding rotation of 2.5 turns will drive the third gear (323) to rotate one turn, and the torque is increased by 2.5 times. Therefore, when the first gear (321) rotates at 7,200 rpm, the third gear (323) The speed of the engine is decelerated to 720 rpm, the speed is reduced by 1/10 times, and the torque is increased by 10 times. It can effectively achieve the four gears included in the reduction gear set (32) in the preferred embodiment of the present invention. After the meshing transmits the power, the rotation speed of the output shaft is lowered, thereby achieving the effect of increasing the torque of the output shaft. Or the purpose of ventilation and exhausting of the confined space; further, a decanter filling port (6) may be further disposed on the deceleration housing (31) of the fan device with the deceleration mechanism, and when the gear meshing is not smooth, the user The butter can be filled through the butter filling port (6) to lubricate the gears in the reduction gear set (32) to achieve smooth running of the gear; finally, the fan device with the speed reducing mechanism can be used according to the needs of the user. A second bracket (14) is disposed on the outer side of the fan device, and a second air outlet (51) is disposed on one side of the first air outlet (12), and the outer cover body (5) is disposed on the other side. Wherein the surface of the outer cover body (5) may be further provided with a plurality of second air inlets (52) to provide external air into the passage of the fan device with the speed reduction mechanism, which has both aesthetics and protection. The advantages of the fan unit of the speed reduction mechanism.

It can be seen from the above description that the present invention has the following advantages compared with the prior art and the product:

1. The fan device with the speed reduction mechanism of the present invention is a speed reduction mechanism formed by a plurality of gear combinations with different pitch circle radii, so that the rotation speed of the output gear is lower than the rotation speed of the input gear, thereby achieving the effect of improving the torque of the output shaft. A high-efficiency ventilator that increases the ventilation and exhaust air volume of the overall turbine.

2. The fan device with the speed reduction mechanism is designed to replace the shortcomings of the traditional fan using belt and pulley transmission, which can effectively reduce the noise pollution during the start of the pulley, and indeed meet the urban environmental protection. Noise specifications and the advantages of sustainable development.

3. The fan device with the speed reduction mechanism of the present invention can reduce the current of the motor starting by the start of the speed reduction mechanism, and the horsepower of the starter can also be reduced from the seven horsepower of the induction motor to the high speed drive of the preferred embodiment of the present invention. The three horsepower of the motor effectively achieves the advantages of energy saving and carbon reduction.

4. The fan device with the speed reduction mechanism is modularized by the speed reduction mechanism, and the gears or bearings in the speed reduction mechanism can be separately replaced, thereby effectively reducing the maintenance cost and the selling price of the speed reduction mechanism and the overall fan.

5. The fan device with the speed reduction mechanism is integrated into the fan inside the high-speed drive motor and the speed reduction mechanism, which can effectively reduce the overall volume of the fan, and is beneficial to install the fan device with the speed reduction mechanism in a place with insufficient space to achieve effective Reduce unnecessary waste of external space.

6. The fan device with the speed reduction mechanism is designed by the gear combination of the speed reduction mechanism, so that the ventilation and exhaust air volume of the fan device with the speed reduction mechanism can reach the performance and efficiency that the general induction motor cannot achieve, and can 50% of the low power consumption achieves the same ventilation and exhaust air volume as the traditional fan, effectively achieving the full use of energy.

7. The fan device with the speed reduction mechanism of the present invention is provided with a second bracket on the outer side of the fan device with the speed reduction mechanism according to the needs of the user. Except for one side of the air outlet, a cover body is fully covered, wherein the outer cover At any position on the surface of the body, a plurality of second air inlets may be further provided to provide external air into the passage of the fan device with the speed reduction mechanism, which has the advantages of both aesthetic appearance and protection of the fan device with the speed reduction mechanism.

In summary, the fan device with the speed reduction mechanism of the present invention can achieve the intended use effect by the above disclosed embodiments, and the creation has not been disclosed before the application, and the company has fully complied with the provisions of the patent law. With requirements.提出Issuing an application for the creation of a patent in accordance with the law, and asking for a review, and granting a patent, it is really sensible.

However, the illustrations and descriptions disclosed above are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention; The characteristic categories and other equivalent changes or modifications made shall be considered as not departing from the design scope of this creation.

(1) ‧‧‧Cylindrical housing

(11)‧‧‧First accommodation space

(12) ‧‧‧First air outlet

(13) ‧‧‧ first air inlet

(14) ‧‧‧second bracket

(4) ‧‧‧Fan

(41)‧‧‧impeller bearings

(411)‧‧‧First bracket

Claims (8)

The utility model relates to a fan device with a speed reduction mechanism, which mainly utilizes a gear combination in a speed reduction mechanism to achieve a high-efficiency ventilator device for increasing the torque, which at least comprises: a cylindrical casing, which forms a first accommodating space inside a first air outlet is disposed on the surface of the cylindrical housing, and a first air inlet is disposed at each end; a high speed driving motor is disposed in the first receiving space of the cylindrical housing, wherein One of the high speed drive motors is provided with a motor rotor; a speed reduction mechanism is corresponding to the high speed drive motor and is accommodated in the first accommodating space, the speed reduction mechanism includes a reduction housing and a reduction gear set. The reduction gear set is disposed in the second accommodating space inside the reduction housing; and at least one fan corresponding to the first air inlet and disposed in the first accommodating space to cover the high speed drive a motor and the speed reduction mechanism, wherein at least one of the fan systems and one of the gear shafts of the reduction gear set are disposed on the same impeller bearing, wherein the impeller bearing is a plurality of first bracket screws The housing of the first cylinder into the outlet. The fan unit with a speed reduction mechanism according to claim 1, wherein the reduction gear set includes a first gear provided on the rotor of the motor, and a a driven gear and a second gear module disposed on the driving gear of the same gear bearing, and a third gear corresponding to the driven gear of the second gear module The driving gear of the second gear module is correspondingly engaged with the third gear, so that the power outputted by the high-speed driving motor is sequentially transmitted from the first gear to the third gear via the motor rotor, and the third gear is a gear output, wherein at least one of the fan systems and the third gear shaft are disposed on the same impeller bearing. The fan device with a speed reduction mechanism according to claim 1, wherein a second bracket is further disposed on an outer side of the cylindrical casing, and a second air outlet is disposed on a surface of the first air outlet. The cover is provided with a cover body, wherein the surface of the cover body is provided with a plurality of second air inlets. The fan unit with a speed reduction mechanism according to claim 1, wherein the speed reduction housing is further provided with a butter filling port for the user to fill the butter to lubricate the reduction gear set. The fan device with a speed reduction mechanism according to claim 2, wherein a pitch radius of the driven gear of the second gear module is greater than the first gear, and a pitch radius of the third gear is greater than The driving gear of the second gear module. The fan device with a speed reduction mechanism according to claim 2 or 5, wherein a ratio of a pitch radius of the driven gear to the first gear is 4:1, and the third gear and the driving gear are The pitch radius ratio is 2.5:1. The fan device with a speed reduction mechanism according to claim 1, wherein the high speed drive motor is screwed to the reduction housing by a plurality of screws, and the reduction housing is screwed to the cylinder by a tripod. Inside the housing. The fan device with a speed reduction mechanism according to claim 1, wherein the fan is one of a single suction centrifugal fan, a double suction centrifugal fan, and a moving wing axial fan.