Speed reducing motor and range hood comprising same

Abstract

The utility model provides a speed reduction motor and a range hood comprising the same, the speed reduction motor comprises a motor assembly, the motor assembly comprises a motor shaft, the second end of the motor shaft is provided with a motor bearing; the gear box assembly is connected with the motor assembly in the axial direction of the motor shaft, the first end of the motor shaft extends into the gear box assembly, and the gear box assembly comprises an output shaft and an output bearing supporting the output shaft. An inserting hole is formed in the end portion, facing the first end of the motor shaft, of the output shaft, the first end of the motor shaft is connected with the output shaft in an inserting mode, and the first end of the motor shaft and the output shaft share the same output bearing. The internal axial space of the gear motor is reasonably utilized, the axial size of the gear motor can be correspondingly reduced, and on the basis that the gear box assembly and the motor assembly are axially connected to save the radial space, the outer diameter of the motor is reduced to reduce the resistance to airflow in an air duct.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a geared motor and a range hood containing the same. Background Technology

[0002] In range hoods, maximum airflow is a crucial performance indicator, directly impacting the effectiveness of smoke extraction. Currently, the motors in range hoods have relatively large outer diameters, which obstruct airflow within the duct and affect air intake, theoretically reducing the maximum airflow. Therefore, it is desirable to minimize the motor's outer diameter.

[0003] In existing technologies, geared motors (gearbox + motor) are usually used to replace direct drive motors. In geared motors, the gearbox and motor are axially assembled. Although the overall outer diameter is reduced, the axial dimension is much larger than that of direct drive motors, which increases the overall thickness of the range hood and is not conducive to installation and layout. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of large axial and radial space occupation of motors in the prior art, and to provide a geared motor and a range hood containing the same.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A geared motor, the geared motor comprising:

[0007] A motor assembly, the motor assembly including a motor shaft, the second end of the motor shaft being provided with a motor bearing;

[0008] A gearbox assembly is provided, which is connected to the motor assembly along the axial direction of the motor shaft. The first end of the motor shaft extends into the gearbox assembly. The gearbox assembly includes an output shaft and an output bearing that supports the output shaft. The end of the output shaft facing the first end of the motor shaft has an insertion hole. The first end of the motor shaft is inserted into the output shaft. The first end of the motor shaft and the output shaft share the same output bearing.

[0009] In this solution, by sharing the same output bearing between the first end of the motor shaft and the output shaft, the number of bearings in the geared motor is reduced. Compared to setting motor bearings at both the first and second ends of the motor shaft, one motor bearing is saved. At the same time, due to the reduction in the number of bearings, the axial space inside the geared motor is utilized more efficiently, allowing the geared motor to reduce its axial dimension accordingly. Thus, based on the axial connection between the gearbox assembly and the motor assembly to save radial space, the axial space is also saved, thereby reducing the outer diameter of the motor and reducing the resistance to airflow in the duct.

[0010] Preferably, the gearbox assembly further includes a rotating frame, which is coaxially arranged with the output shaft and integrally formed with the output shaft. The rotating frame and the output bearing jointly support the first end of the output shaft and the motor shaft.

[0011] In this solution, by integrating the rotating frame with the output shaft, the output shaft can be supported by the rotating frame. Compared to setting two output bearings to support the output shaft and setting the output shaft and rotating frame separately, one output bearing is saved, the axial dimension of the geared motor is further reduced, and at the same time, the reliability of the support for the first end of the output shaft and motor shaft can be guaranteed.

[0012] Preferably, the output bearing is disposed away from the motor shaft, and the rotating frame is disposed close to the motor shaft, wherein the output bearing is embedded in the housing of the gearbox assembly.

[0013] In this solution, by setting the output bearing inside the housing, compared to the output bearing occupying the internal axial space of the geared motor, the output bearing can further save axial space, thereby reducing the axial dimension of the geared motor accordingly.

[0014] Preferably, the rotating frame is provided with a clearance groove corresponding to the output bearing, and the output bearing is at least partially located in the clearance groove.

[0015] In this design, a clearance groove is provided to prevent interference between the rotating frame and the output bearing. At the same time, when the output bearing extends into the clearance groove, the axial dimension of the geared motor can be further reduced.

[0016] Preferably, the rotating frame is provided with a mounting part at an axis away from the output shaft, and the thickness of the mounting part along the axial direction of the motor shaft is greater than the thickness of the area where the clearance groove is provided on the rotating frame.

[0017] In this solution, the mounting part is connected to the housing of the gearbox assembly to support the output shaft, thereby improving the reliability of the output shaft support while ensuring the thickness of the mounting part.

[0018] Preferably, a guide bearing is also provided in the insertion hole, and the first end of the motor shaft extends into the guide bearing to restrict the movement of the motor shaft in the radial direction.

[0019] In this solution, the above settings are used to prevent the motor shaft from shaking during operation.

[0020] Preferably, the geared motor includes a housing, the housing comprising a first housing of the motor assembly and a second housing of the gearbox assembly, the first housing having a first opening at the end facing the gearbox assembly, and the second housing having a second opening at the end facing the motor assembly, the first housing and the second housing being detachably connected by a bolt assembly, and the motor assembly and the gearbox assembly sharing the same housing.

[0021] In this solution, the end cover is omitted compared to the motor assembly having an end cover and a rear shell, and the gearbox assembly having an end cover and a rear shell, thus saving materials and reducing the size of the geared motor in the axial direction.

[0022] Preferably, the size of the second opening is larger than the size of the first opening, and the first housing extends at least partially into the second housing;

[0023] Alternatively, the size of the first opening is larger than the size of the second opening, and the second housing extends at least partially into the first housing.

[0024] In this solution, the axial dimension of the geared motor is reduced by extending the first housing portion into the second housing or extending the second housing portion into the first housing, as described above.

[0025] Preferably, the dimension of the second housing along the axial direction of the motor shaft is no greater than 30.5 mm.

[0026] In this solution, the above settings are used to reduce the airflow resistance of the geared motor in the range hood duct.

[0027] A range hood, the range hood including the geared motor as described above.

[0028] In this solution, the range hood includes the aforementioned geared motor, which axially connects the gearbox assembly and the motor assembly to save space and dimensions in the radial direction. The first end of the motor shaft shares an output bearing support with the output shaft to reduce the space occupied in the axial direction and dimensions by saving the number of bearings.

[0029] The positive and progressive effects of this utility model are as follows: By sharing the same output bearing between the first end of the motor shaft and the output shaft, the number of bearings in the geared motor is reduced. Compared with setting motor bearings at both the first and second ends of the motor shaft, one motor bearing is saved. At the same time, due to the reduction in the number of bearings, the axial space inside the geared motor is rationally utilized, so that the axial dimension of the geared motor can be reduced accordingly. Thus, based on the axial connection between the gearbox assembly and the motor assembly to save radial space, the axial space is also saved accordingly, thereby reducing the outer diameter of the motor to reduce the resistance to airflow in the duct. Attached Figure Description

[0030] Figure 1 This is a perspective view of a geared motor according to a preferred embodiment of the present invention.

[0031] Figure 2 This is a front view of a geared motor according to a preferred embodiment of the present invention.

[0032] Figure 3 for Figure 2 AA sectional view.

[0033] Explanation of reference numerals in the attached figures:

[0034] Motor assembly 1

[0035] Motor shaft 11

[0036] Motor bearing 12

[0037] Gearbox assembly 2

[0038] Output shaft 21

[0039] Output bearing 22

[0040] Socket 23

[0041] Turntable 24

[0042] 25 clearance slots

[0043] Installation Department 26

[0044] Guide bearing 27

[0045] Casing 3

[0046] First shell 31

[0047] Second shell 32 Detailed Implementation

[0048] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0049] This embodiment provides a geared motor, the specific structure of which is as follows: Figure 1 , Figure 2 and Figure 3 As shown, the geared motor includes:

[0050] Motor assembly 1, which includes a motor shaft 11, and a motor bearing 12 is provided at the second end of the motor shaft 11;

[0051] Gearbox assembly 2 is connected to motor assembly 1 along the axial direction of motor shaft 11. The first end of motor shaft 11 extends into gearbox assembly 2. Gearbox assembly 2 includes output shaft 21 and output bearing 22 supporting output shaft 21. The end of output shaft 21 facing the first end of motor shaft 11 is provided with insertion hole 23. The first end of motor shaft 11 is inserted into output shaft 21. The first end of motor shaft 11 and output shaft 21 share the same output bearing 22.

[0052] Specifically, both the output shaft 21 and the motor shaft 11 are rods. The second end of the motor shaft 11 is located inside the motor assembly 1 and is supported by the motor bearing 12. The first end of the motor shaft 11 is inserted into the output shaft 21 and is coaxially arranged. The output bearing 22 is provided in the gearbox assembly 2 to support the output shaft 21. When the output shaft 21 and the first end of the motor shaft 11 are inserted into each other, they share the same output bearing 22 for support. Compared with the scheme where the first and second ends of the motor shaft 11 are both equipped with motor bearings 12 to support the motor shaft 11, one motor bearing 12 is saved. At the same time, due to the reduction in the number of bearings, the axial space required for the bearings can be reduced accordingly. The axial space inside the geared motor is used more reasonably, that is, the axial dimension of the geared motor can be reduced accordingly, thereby reducing the axial outer diameter of the geared motor. In other words, the geared motor can reduce the resistance to airflow in the range hood duct in the axial direction.

[0053] In addition, the motor assembly 1 and the gearbox assembly 2 are axially connected. Compared with the gearbox assembly 2 being located in the radial direction of the motor assembly 1, the axial connection can reduce the space occupied by the geared motor in the radial space, that is, reduce the size of the geared motor in the radial direction. Based on the reduction of the axial outer diameter of the geared motor, the radial outer diameter of the geared motor is also reduced accordingly, realizing the reduction of the overall outer diameter of the geared motor. This improves the drag reduction effect of the geared motor on the airflow in the duct, ensures the airflow of the duct, and does not increase the difficulty of installing the geared motor in the range hood or increase the size of the range hood.

[0054] In this embodiment, the gearbox assembly 2 further includes a rotating frame 24, which is coaxially arranged with the output shaft 21 and integrally formed with the output shaft 21. The rotating frame 24 and the output bearing 22 jointly support the first end of the output shaft 21 and the motor shaft 11.

[0055] Specifically, the rotating frame 24 is a disc structure located inside the gearbox assembly 2. The rotating frame 24 is coaxially arranged with the output shaft 21 and is integrally formed with the output shaft 21. The output shaft 21 can be supported by the rotating frame 24. Compared with setting two output bearings 22 and one rotating frame 24 to support the output shaft 21, one output bearing 22 is saved, and the axial dimension of the gearbox assembly 2 can be reduced accordingly. Similarly, the axial dimension of the geared motor can also be reduced. At the same time, the reliability of the support for the first end of the output shaft 21 and the motor shaft 11 can be guaranteed.

[0056] In this embodiment, the end face of the rotating frame 24 can be flush with the end of the output shaft 21 facing the motor shaft 11. This makes the integrated output shaft 21 and rotating frame 24 occupy less space along the axial direction of the motor shaft 11 compared to the original separate arrangement of the rotating frame 24 and output shaft 21, where the output shaft 21 and rotating frame 24 are arranged sequentially along the axial direction of the motor shaft 11. Consequently, the size of the gearbox assembly 2 can be reduced, thereby reducing the axial dimension of the geared motor. It can be understood that the motor shaft 11, output shaft 21, and rotating frame 24 are coaxially arranged, and the axial direction of the motor shaft 11 is the same as the axial direction of the output shaft 21 and the axial direction of the geared motor. Further details are omitted here.

[0057] In this embodiment, the output bearing 22 is disposed away from the motor shaft 11, and the rotating frame 24 is disposed close to the motor shaft 11. The output bearing 22 is embedded in the housing of the gearbox assembly 2.

[0058] Specifically, along the axial direction of the motor shaft 11, the output bearing 22 and the rotating frame 24 are arranged sequentially. The output bearing 22 is positioned away from the motor shaft 11, while the rotating frame 24 is positioned close to the motor shaft 11. This provides support for the output shaft 21 from different areas, preventing the output shaft 21 from being cantilevered. Simultaneously, it supports the motor shaft 11 to which the output shaft 21 is inserted. The housing of the gearbox assembly 2 has a mounting groove, in which the output bearing 22 is embedded. Compared to the output bearing 22 and housing being arranged sequentially along the axial direction of the motor shaft 11, embedding the output bearing 22 in the mounting groove reduces the internal axial space occupied by the output bearing 22 in the gearbox assembly 2, thereby reducing the axial dimension of the gearbox assembly 2 and consequently reducing the axial dimension of the geared motor.

[0059] Furthermore, in this embodiment, the rotating frame 24 is provided with a relief groove 25 corresponding to the output bearing 22, and the output bearing 22 is at least partially located in the relief groove 25.

[0060] Specifically, the clearance groove 25 is an annular groove, coaxially arranged with the output shaft 21. Based on the integral molding of the output shaft 21 and the rotating frame 24, the annular groove surrounds the outer circumference of the output shaft 21. Along the axial direction of the motor shaft 11, the output bearing 22, embedded in the mounting groove, extends at least partially into the clearance groove 25. By providing the clearance groove 25, interference between the rotating frame 24 and the output bearing 22 is avoided. Simultaneously, when the output bearing 22 extends into the clearance groove 25, the internal axial space occupied by the output bearing 22 in the gearbox assembly 2 is further reduced, allowing for a corresponding reduction in the axial dimension of the gearbox assembly 2 and the axial dimension of the geared motor. It can be understood that the opening size of the clearance groove 25 is larger than the size of the output bearing 22.

[0061] In this embodiment, a mounting portion 26 is provided on the axis of the rotating frame 24 away from the output shaft 21. The thickness of the mounting portion 26 along the axial direction of the motor shaft 11 is greater than the thickness of the area where the clearance groove 25 is provided on the rotating frame 24.

[0062] Specifically, the rotating frame 24 is provided with a clearance groove 25 and a mounting portion 26. The clearance groove 25 is located between the mounting portion 26 and the output shaft 21 along the radial direction of the rotating frame 24. The mounting portion 26 is the wall surface of the rotating frame 24 itself and is used to connect with the housing of the gearbox assembly 2 to support the output shaft 21 and the motor shaft 11. To ensure the support effect, the thickness of the mounting portion 26 is greater than the thickness of the area of ​​the rotating frame 24 where the clearance groove 25 is provided. On the one hand, this facilitates the connection between the mounting portion 26 and the housing of the gearbox assembly 2; on the other hand, the sufficiently thick mounting portion 26 can prevent deformation during the connection with the housing of the gearbox assembly 2, thereby improving the reliability of the support for the output shaft 21 and the motor shaft 11.

[0063] In this embodiment, a guide bearing 27 is also provided in the insertion hole 23, and the first end of the motor shaft 11 extends into the guide bearing 27 to restrict the movement of the motor shaft 11 in the radial direction of the motor shaft 11.

[0064] Specifically, the insertion hole 23 is located at the end of the output shaft 21 facing the motor shaft 11. The insertion hole 23 is recessed from this end to allow the end of the motor shaft 11 to extend into it. The guide bearing 27 is embedded in the insertion hole 23. The diameter of the first end of the motor shaft 11 is smaller than the diameter of the second end to allow it to extend into the insertion hole 23 and cooperate with the guide bearing 27. By providing the guide bearing 27 in the insertion hole 23, the position of the motor shaft 11 is restricted in the radial direction of the motor shaft 11, preventing the motor shaft 11 from shaking during operation and improving the reliability of the geared motor.

[0065] In this embodiment, the geared motor includes a housing 3, which includes a first housing 31 of the motor assembly 1 and a second housing 32 of the gearbox assembly 2. The end of the first housing 31 facing the gearbox assembly 2 has a first opening, and the end of the second housing 32 facing the motor assembly 1 has a second opening. The first housing 31 and the second housing 32 are detachably connected by a bolt assembly, and the motor assembly 1 and the gearbox assembly 2 share the same housing 3.

[0066] Specifically, the motor assembly 1 and the gearbox assembly 2 share the same housing 3. The housing 3 includes a first housing 31 for the motor assembly 1 and a second housing 32 for the gearbox assembly 2. The first housing 31 has a first opening, and the second housing 32 has a second opening. The motor shaft 11 and the motor bearing 12 are installed in the first housing 31 through the first opening, and the output shaft 21, the output bearing 22, and the rotating frame 24 are installed in the second housing 32 through the second opening. The first housing 31 and the second housing 32 are connected by a bolt assembly. That is, the first housing 31 uses the second housing 32 to close the first opening, and similarly, the second housing 32 uses the first housing 31 to close the second opening. Compared to the motor assembly 1 having end covers and a rear housing, and the gearbox assembly 2 having end covers and a rear housing, this eliminates the need for two end covers, saving materials. Furthermore, it allows the second housing 32 to be closer to the first housing 31 in the axial direction, thereby reducing the size of the geared motor.

[0067] In this embodiment, the size of the second opening is larger than the size of the first opening, and the first housing 31 extends at least partially into the second housing. The axial dimension of the geared motor is reduced by extending the first housing 31 partially into the second housing 32.

[0068] In other embodiments, the size of the first opening is larger than the size of the second opening, and the second housing 32 extends at least partially into the first housing 31. This method of partially extending the second housing 32 into the first housing 31 also achieves a reduction in the axial dimension of the geared motor.

[0069] In this embodiment, the axial dimension of the second housing 32 along the motor shaft 11 is no greater than 30.5 mm. By reducing the number of output bearings 22 and motor bearings 12, the axial dimension of the second housing 32 along the motor shaft 11 can be reduced from 45.5 mm to 30.5 mm. This reduces the outer diameter of the geared motor in different directions and reduces the airflow resistance of the geared motor within the range hood duct.

[0070] This embodiment also provides a range hood, which includes the aforementioned geared motor, to axially connect the gearbox assembly 2 and the motor assembly 1 to save space and size in the radial direction, and to reduce the space occupied in the axial direction and size by sharing an output bearing 22 with the first end of the motor shaft 11 and the output shaft 21 to save the number of bearings.

[0071] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A geared motor, characterized in that, The geared motor includes: A motor assembly, the motor assembly including a motor shaft, the second end of the motor shaft being provided with a motor bearing; A gearbox assembly is provided, which is connected to the motor assembly along the axial direction of the motor shaft. The first end of the motor shaft extends into the gearbox assembly. The gearbox assembly includes an output shaft and an output bearing that supports the output shaft. The end of the output shaft facing the first end of the motor shaft has an insertion hole. The first end of the motor shaft is inserted into the output shaft. The first end of the motor shaft and the output shaft share the same output bearing.

2. The geared motor as described in claim 1, characterized in that, The gearbox assembly also includes a rotating frame, which is coaxially arranged with the output shaft and integrally formed with the output shaft. The rotating frame and the output bearing together support the first end of the output shaft and the motor shaft.

3. The geared motor as described in claim 2, characterized in that, The output bearing is disposed away from the motor shaft, and the rotating frame is disposed close to the motor shaft, wherein the output bearing is embedded in the housing of the gearbox assembly.

4. The geared motor as described in claim 3, characterized in that, The rotating frame is provided with a clearance groove corresponding to the output bearing, and the output bearing is at least partially located in the clearance groove.

5. The geared motor as described in claim 4, characterized in that, The rotating frame is provided with a mounting part at an axis away from the output shaft, and the thickness of the mounting part along the axial direction of the motor shaft is greater than the thickness of the area where the clearance groove is provided on the rotating frame.

6. The geared motor as described in claim 1, characterized in that, A guide bearing is also provided inside the insertion hole, and the first end of the motor shaft extends into the guide bearing to restrict the movement of the motor shaft in the radial direction.

7. The geared motor as described in claim 1, characterized in that, The geared motor includes a housing, which includes a first housing of the motor assembly and a second housing of the gearbox assembly. The first housing has a first opening at the end facing the gearbox assembly, and the second housing has a second opening at the end facing the motor assembly. The first housing and the second housing are detachably connected by a bolt assembly, and the motor assembly and the gearbox assembly share the same housing.

8. The geared motor as described in claim 7, characterized in that, The second opening is larger than the first opening, and the first housing extends at least partially into the second housing; Alternatively, the size of the first opening is larger than the size of the second opening, and the second housing extends at least partially into the first housing.

9. The geared motor as described in claim 8, characterized in that, The second housing has an axial dimension of no more than 30.5 mm along the motor shaft.

10. A range hood, characterized in that, The range hood includes a geared motor as described in any one of claims 1-9.

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