Couplings, fan mechanisms, air conditioners

Abstract

This utility model provides a coupling, a fan mechanism, and an air conditioner. The coupling includes a rigid part and a flexible part connected to the rigid part. The rigid part has a first insertion hole, and the flexible part has a second insertion hole. The drive shaft has a first insertion section, and the motor output shaft has a second insertion section. The first insertion section is inserted into the first insertion hole, and the second insertion section is inserted into the second insertion hole. According to this utility model, by designing the coupling to consist of a rigid part and a flexible part, with the rigid part connecting to the drive shaft and the flexible part connecting to the motor output shaft, the flexible part has a good buffering effect. When the motor starts, the buffering effect of the flexible part can significantly reduce the noise generated during the collision between the motor output shaft and the coupling. Moreover, the flexible part can also significantly weaken the vibration transmitted to the drive shaft during motor operation.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, specifically relating to a coupling, a fan mechanism, and an air conditioner. Background Technology

[0002] The fan system of a ducted air handling unit includes fan blades, a drive shaft, a coupling, and a motor. The fan blades are mounted on the drive shaft, which is connected to the motor shaft via a coupling. Two screws are used on the coupling to securely fasten the drive shaft and the motor shaft respectively. Because the motor shaft and the coupling have a clearance fit, the mating surfaces of the motor shaft and the coupling will collide when the motor starts, resulting in noticeable noise during motor startup. Utility Model Content

[0003] Therefore, this utility model provides a coupling that can solve the technical problem that existing couplings are poorly designed, and the motor shaft and coupling will collide when the motor starts, resulting in obvious noise.

[0004] To address the aforementioned problems, this utility model provides a fan mechanism, comprising a rigid portion and a flexible portion connected to the rigid portion. The rigid portion has a first insertion hole, and the flexible portion has a second insertion hole. A drive shaft has a first insertion section, and the output shaft of a motor has a second insertion section. The first insertion section is inserted into the first insertion hole, and the second insertion section is inserted into the second insertion hole.

[0005] In some embodiments, the rigid portion includes a main body segment and a mating segment connected to the main body segment, the first insertion hole is formed on the main body segment, the mating segment has a mounting hole, the flexible portion includes an inner sleeve disposed within the mounting hole, and the second insertion hole is formed on the inner sleeve.

[0006] In some embodiments, the flexible portion further includes a connecting wall and an outer sleeve, the outer sleeve being connected to the inner sleeve via the connecting wall, and the outer sleeve being fitted onto the mating section.

[0007] In some embodiments, a snap-fit ​​structure is formed on the outer casing, and a snap-fit ​​mating structure is formed on the mating section, wherein the snap-fit ​​structure and the snap-fit ​​mating structure are snap-fit ​​mating.

[0008] In some embodiments, the second insert segment and the second socket are clearance-fitted.

[0009] In some embodiments, the cross-sectional shape of the second insertion segment is polygonal, and the cross-sectional shape of the second socket is also polygonal, with the cross-sectional shapes of the second insertion segment and the second socket being adapted to each other.

[0010] In some implementations, fasteners detachably connect the rigid portion and the first insert segment.

[0011] In some embodiments, the first insert segment is provided with a slot, the rigid portion is provided with a threaded hole, and the fastener is threaded into the threaded hole and inserted into the slot.

[0012] This utility model also provides a fan mechanism, including the aforementioned coupling.

[0013] This utility model also provides an air conditioner, including the aforementioned fan mechanism.

[0014] The coupling, fan mechanism, and air conditioner provided by this utility model have the following beneficial effects: By designing the coupling to consist of a rigid part and a flexible part, the rigid part connects to the drive shaft, and the flexible part connects to the output shaft of the motor. The flexible part has a good buffering effect. When the motor starts, the buffering effect of the flexible part can significantly reduce the noise generated during the collision between the output shaft of the motor and the coupling. Moreover, the flexible part can also significantly weaken the vibration transmitted to the drive shaft during the operation of the motor. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the motor bracket of the fan mechanism in an embodiment of the present utility model, with the motor and mounting plate disassembled. Figure 2 This is a schematic diagram of the coupling according to an embodiment of the present invention from a first-view perspective; Figure 3 This is a schematic diagram of the coupling according to an embodiment of the present invention from a second perspective; Figure 4 This is a cross-sectional view of the coupling according to an embodiment of the present utility model; Figure 5 This is a partially enlarged schematic diagram of the fan mechanism according to an embodiment of the present utility model; Figure 6 This is a partially enlarged schematic diagram of the fan mechanism according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the fan mechanism according to an embodiment of the present utility model; Figure 8This is a cross-sectional view of the fan mechanism according to an embodiment of the present utility model.

[0017] The reference numerals in the attached figures are as follows: 1. First insertion hole; 2. Second insertion hole; 3. Rigid part; 31. Main body section; 32. Mating section; 4. Flexible part; 41. Inner sleeve; 42. Connecting wall; 43. Outer sleeve; 44. Snap-fit ​​structure; 5. Drive shaft; 6. Motor; 7. Fastener; 8. Slot; 9. Threaded hole; 10. Mounting plate; 11. Motor bracket; 12. Volute; 13. Impeller; 14. First fixing bracket; 15. First bearing; 16. Second fixing bracket; 17. Second bearing; 18. Hook; 19. Slot. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0022] See also Figures 1 to 8 As shown, according to an embodiment of the present invention, a coupling is provided, including a rigid part 3 and a flexible part 4 connected to the rigid part 3. The rigid part 3 has a first insertion hole 1, and the flexible part 4 has a second insertion hole 2. The transmission shaft 5 has a first insertion section, and the output shaft of the motor 6 has a second insertion section. The first insertion section is inserted into the first insertion hole 1, and the second insertion section is inserted into the second insertion hole 2.

[0023] In this technical solution, the coupling is designed to consist of a rigid part 3 and a flexible part 4. The rigid part 3 is connected to the transmission shaft 5, and the flexible part 4 is connected to the output shaft of the motor 6. The flexible part 4 has a good buffering effect. When the motor starts, the buffering effect of the flexible part 4 can significantly reduce the noise generated during the collision between the output shaft of the motor 6 and the coupling. Moreover, the flexible part 4 can also significantly weaken the vibration transmitted to the transmission shaft 5 during the operation of the motor 6.

[0024] See also Figure 1 and Figure 4 As shown, the rigid part 3 includes a main body section 31 and a mating section 32 connected to the main body section 31. A first insertion hole 1 is constructed on the main body section 31, and an installation hole is constructed on the mating section 32. The flexible part 4 includes an inner sleeve 41, which is disposed in the installation hole, and a second insertion hole 2 is formed on the inner sleeve 41.

[0025] In this embodiment, the mating section 32 is part of the rigid part 3. The inner sleeve 41 of the flexible part 4 is placed in the mounting hole of the mating section 32, which is equivalent to using the rigid structure to support the flexible inner sleeve 41. This not only achieves the buffering of the motor operation by the flexible part 4, but also does not affect the transmission of the motor to the transmission shaft 5 through the coupling.

[0026] See also Figure 1 and Figure 4 As shown, the flexible part 4 also includes a connecting wall 42 and an outer sleeve 43. The outer sleeve 43 is connected to the inner sleeve 41 through the connecting wall 42. The outer sleeve 43 is fitted onto the mating section 32, which can increase the mating area between the flexible part 4 and the rigid part 3 and increase the degree of restraint between them, making the connection between the flexible part 4 and the rigid part 3 more secure.

[0027] See also Figure 1 and Figure 4 As shown, a snap-fit ​​structure 44 is formed on the outer casing 43, and a snap-fit ​​mating structure is formed on the mating section 32. The snap-fit ​​structure 44 and the snap-fit ​​mating structure are snap-fit ​​mated together.

[0028] In this technical solution, the connection strength between the flexible part 4 and the rigid part 3 is further enhanced by utilizing the snap-fit ​​structure 44 and the snap-fit ​​mating structure. Specifically, the snap-fit ​​structure 44 can be a protrusion formed on the inner peripheral wall of the outer sleeve 43, and the snap-fit ​​mating structure can be a groove formed on the outer peripheral wall of the mating section 32; or the snap-fit ​​structure 44 can be a groove formed on the inner peripheral wall of the outer sleeve 43, and the snap-fit ​​mating structure can be a protrusion formed on the outer peripheral wall of the mating section 32. It should be noted that the rigid part 3 can be made of metal, and the flexible part 4 can be made of rubber. The specific manufacturing process of the coupling is as follows: the rigid part 3 made of metal is placed into a rubber molding mold, and then rubber material is injected. After cooling, the two are tightly connected together and will not loosen.

[0029] In one specific implementation, the second insert section and the second insertion hole 2 are fitted with a clearance, which is equivalent to the clearance fit between the output shaft of the motor 6 and the coupling. This clearance fit can solve the vibration and abnormal noise problems caused by the coaxiality deviation between the center of the transmission shaft 5 and the output shaft of the motor 6. Specifically, the clearance between the second insert section and the second insertion hole 2 ranges from 0.1mm to 0.4mm.

[0030] See also Figure 1 , Figure 2 and Figure 4 As shown, the cross-sectional shape of the second insertion section is polygonal, and the cross-sectional shape of the second socket 2 is also polygonal. The cross-sectional shape of the second insertion section and the cross-sectional shape of the second socket 2 are compatible.

[0031] In this embodiment, the use of polygonal shapes to fit together makes the assembly between the motor output shaft and the coupling more convenient. After they are matched, transmission can still be achieved without screw fixing, and the absence of screw fixing makes it easier to operate when replacing the motor after sales.

[0032] See also Figure 1 and Figure 5 As shown, fastener 7 detachably connects the rigid part 3 and the first insert section.

[0033] In this technical solution, the coupling and the drive shaft 5 are securely fixed together using fasteners 7. This fixing method is simple and reliable. The secure fixing ensures that the power generated by the motor 6 during operation can be stably transmitted to the drive shaft 5 through the coupling.

[0034] See also Figure 2 , Figure 4 and Figure 6 As shown, the first insertion section has a slot 8, the rigid part 3 has a threaded hole 9, and the fastener 7 is threaded into the threaded hole 9 and inserted into the slot 8.

[0035] In this embodiment, the fastener 7 is threaded into the threaded hole 9 and inserted into the slot 8, thereby fixing the coupling and the drive shaft 5 together. The insertion of the fastener 7 into the slot 8 of the drive shaft 5 makes the alignment of the fastener 7 and the drive shaft 5 easier.

[0036] This utility model also provides a fan mechanism, including the aforementioned coupling, drive shaft 5, motor 6, mounting plate 10, motor bracket 11, volute 12, impeller 13, first fixing frame 14, first bearing 15, second fixing frame 16, and second bearing 17. The impeller 13 is mounted on the drive shaft 5, and the motor drives the drive shaft 5 to rotate, thereby causing the impeller 13 to rotate and generate wind power. The motor 6 is fixed to the motor bracket 11 with screws. The mounting plate 10 has a slot 19, and the motor bracket 11 has a hook 18. The hook 18 on the motor bracket 11 engages with the slot 19 on the mounting plate 10, and the motor bracket 11 is also fixed to the mounting plate 10 with screws. There are at least two volutes 12 and at least two impellers 13. Each volute 12, the first fixed frame 14, and the second fixed frame 16 are fixed to the mounting plate 10, with each volute 12 located between the first fixed frame 14 and the second fixed frame 16. A first bearing 15 is mounted on the first fixed frame 14, and a second bearing 17 is mounted on the second fixed frame 16. The drive shaft 5 passes through the first bearing 15 and the second bearing 17, providing two supports for the drive shaft 5. Each impeller 13 is mounted on the drive shaft 5 and is also located within its respective volute 12. The motor 6 and the motor bracket 11 are located on the outermost side of the fan mechanism. Figure 1For example, the motor 6 and the motor bracket 11 are located on the far right of the fan mechanism, the first fixed frame 14 and the second fixed frame 16 are located on the left side of the motor 6, and the first fixed frame 14 is located on the left side of the second fixed frame 16.

[0037] The assembly process of the fan mechanism is as follows: First, assemble the first fixed frame 14 and the second fixed frame 16 onto the mounting plate 10; then assemble each volute 12 onto the mounting plate 10, and insert each impeller 13 into the drive shaft 5 and then into each volute 12; next, install the first bearing 15 and the second bearing 17 respectively, and then use fasteners 7 to fix the drive shaft 5 and the coupling. The motor 6 is fixed to the motor bracket 11 with screws, and the motor bracket 11 is engaged with the slot 19 of the mounting plate 10 through the hook 18; finally, move the motor 6 along the axial direction of the motor 6 so that the output shaft of the motor 6 engages with the polygonal hole of the coupling. After assembly, fix the motor bracket 11 onto the mounting plate 10 with screws.

[0038] When repairing and replacing motor 6 during after-sales service, since the output shaft of motor 6 and the flexible part 4 of the coupling are clearance-fitted and there are no screws for tightening, motor 6 can be easily removed by simply loosening the screws fixing motor bracket 11 and moving motor 6 and motor bracket 11 away from the coupling. This is very convenient. In contrast, conventional connection methods require removing the volute 12, impeller 13, etc., to replace motor 6. Compared to conventional methods, the solution proposed in this application reduces the workload of after-sales personnel, thereby improving work efficiency and user satisfaction.

[0039] This utility model also provides an air conditioner, including the aforementioned fan mechanism. The air conditioner can be a ducted unit, a wall-mounted unit, etc. (but is not limited to these).

[0040] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A coupling, characterized in that It includes a rigid part (3) and a flexible part (4) connected to the rigid part (3). The rigid part (3) has a first insertion hole (1) and the flexible part (4) has a second insertion hole (2). The drive shaft (5) has a first insertion section and the output shaft of the motor (6) has a second insertion section. The first insertion section is inserted into the first insertion hole (1) and the second insertion section is inserted into the second insertion hole (2).

2. The coupling according to claim 1, characterized in that The rigid part (3) includes a main body section (31) and a mating section (32) connected to the main body section (31). The first insertion hole (1) is constructed on the main body section (31), and the mating section (32) is constructed with an installation hole. The flexible part (4) includes an inner sleeve (41), which is disposed in the installation hole, and the second insertion hole (2) is formed on the inner sleeve (41).

3. The coupling of claim 2, wherein, The flexible part (4) also includes a connecting wall (42) and an outer sleeve (43), the outer sleeve (43) being connected to the inner sleeve (41) through the connecting wall (42), and the outer sleeve (43) being fitted onto the mating section (32).

4. The coupling of claim 3, wherein, A snap-fit ​​structure (44) is formed on the outer casing (43), and a snap-fit ​​mating structure is formed on the mating section (32). The snap-fit ​​structure (44) and the snap-fit ​​mating structure are snap-fit ​​mating.

5. The coupling of claim 1, wherein, The second insertion section and the second insertion hole (2) are fitted with a clearance.

6. The coupling of claim 1, wherein, The cross-sectional shape of the second insert segment is polygonal, and the cross-sectional shape of the second socket (2) is also polygonal. The cross-sectional shape of the second insert segment and the cross-sectional shape of the second socket (2) are compatible.

7. Coupling according to any of claims 1 to 6, characterized in that Fastener (7) detachably connects the rigid part (3) and the first insert segment.

8. The coupling of claim 7, wherein, The first insert section has a slot (8) and the rigid part (3) has a threaded hole (9). The fastener (7) is threaded into the threaded hole (9) and inserted into the slot (8).

9. A fan mechanism, characterized in that it includes the coupling as described in any one of claims 1 to 8.

10. An air conditioner, characterized in that it includes the fan mechanism as described in claim 9.

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