Motor and fan wheel connecting and fastening structure of air conditioner indoor unit
Patent Information
- Application Number
- CN202522591322.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-05
AI Technical Summary
In existing air conditioner indoor units, the small guide space between the motor shaft and the fan shaft sleeve makes installation difficult, the limit screws are hard to align and easily loosen, affecting quality and installation efficiency.
The system uses a round shaft and a guide cone to work together. The wind turbine bushing is equipped with a guide groove and a U-shaped groove. The pin slides into the U-shaped groove along the guide ramp to achieve quick alignment. The limit screw is locked in an annular groove on the shaft to ensure alignment and locking.
This technology enables quick assembly of the motor shaft and the impeller bushing, solving the problems of inaccurate or loose locking of the limit screws and improving installation efficiency and quality.
Smart Images
Figure CN224932845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air conditioning technology, specifically to a connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit. Background Technology
[0002] In practice, air conditioner chassis are equipped with detachable impellers and motors. The motor drives the impeller to rotate and deliver air. Current technology primarily uses a flat shaft for the motor and a through-hole for the impeller bushing. The flat shaft is inserted into the through-hole. However, the assembly guide for the motor shaft and impeller bushing is generally very small. During production and installation, alignment is crucial. When replacing the motor after sales, in environments where the evaporator obscures the view, it is difficult to align the motor flat shaft and bushing, and the flat shaft cannot drive the through-hole to rotate. Therefore, a limiting screw is often installed on the impeller bushing, passing through the bushing and locking onto the motor flat shaft. However, because the motor flat shaft only has one flat side, with the other three sides being curved surfaces, the limiting screw... The screw is installed on the bushing on the inner side of the impeller blades. When tightening the limit screw, a person needs to find the flat position first before tightening. However, since the limit screw is installed on the inner side of the impeller, the view is actually blocked by the impeller blades, so it takes time to find the flat position. Even if the flat position is found, if the limit screw is not aligned with the flat position, the motor shaft needs to be manually turned to align with the flat position before tightening the limit screw. If the screw is not tightened on the flat position, but on the arc surface of the motor shaft, the limit screw will become loose and slip after running for a period of time, resulting in abnormal noise and after-sales quality problems. In short, the motor flat shaft and bushing are not easy to align, and the limit screw and the flat position of the motor flat shaft are not easy to align. Utility Model Content
[0003] This utility model aims to solve the aforementioned problems. To address this, the motor shaft is configured as a round shaft with a guide cone at its front end. The impeller bushing has a through hole with a guide groove on its end face. A pin is installed on the shaft, and a U-shaped groove is provided on the impeller bushing. A guide ramp, either spiral or inclined, is provided on the side of the U-shaped groove. The shaft and bushing are installed coaxially. The shaft is inserted into the bushing during assembly, and the guide cone is first inserted into the guide groove for quick alignment. During assembly, the pin slides smoothly into the U-shaped groove along the spiral guide ramp, achieving pin-groove engagement. The motor drives the impeller to rotate. Simultaneously, to facilitate locking the limit screw, a limit screw is installed on the bushing, and an annular limit groove is provided on the shaft. When locking the limit screw, workers no longer need to locate the motor shaft flatness before locking, as in the traditional method. They simply pass the limit screw through the bushing and lock it onto the motor shaft, ensuring the limit screw is locked within the limit groove, securely locked, and will not loosen.
[0004] This invention enables quick assembly of the motor shaft and the impeller bushing, and solves the problems of inaccurate and loose locking of the limit screws between the motor shaft and the impeller, achieving rapid installation and tightening, saving time, and ensuring quality.
[0005] According to some embodiments of the present utility model, a connection and fastening structure for a motor and a wind wheel of an indoor air conditioner unit comprises a chassis, on which a detachable wind wheel and a motor are arranged. The motor is provided with a rotating shaft, on which a latch is arranged. The wind wheel is provided with a shaft sleeve, which is provided with a U-shaped groove. The side surface of the U-shaped groove is provided with a guide inclined platform. The rotating shaft and the shaft sleeve are coaxial, the rotating shaft is assembled and inserted into the shaft sleeve, and the latch is configured to abut against the guide inclined platform and slide into the U-shaped groove during assembly.
[0006] According to some embodiments of the present utility model, the U-shaped groove is arranged on the end face of the shaft sleeve, the U-shaped grooves are distributed circumferentially along the end face of the shaft sleeve, the inner diameter of the U-shaped groove is in clearance fit with the outer diameter of the latch of the motor, and the guide inclined platform is of a spiral type or an inclined line type.
[0007] According to some embodiments of the present utility model, the wind wheel comprises fan blades, a limit groove is arranged on the rotating shaft, a through hole is arranged in the radial direction of the shaft sleeve on the side close to the fan blades, a limit screw is mounted on the shaft sleeve, and the limit screw passes through the through hole of the shaft sleeve and is locked in the limit groove.
[0008] According to some embodiments of the present utility model, the number of the U-shaped grooves is set to N, where 1≤N≤10.
[0009] According to some embodiments of the present utility model, in the spiral type, a pair of U-shaped grooves are taken as the center line, the side surfaces of the U-shaped grooves are respectively provided with spiral guide inclined platforms with opposite rotation directions, one being higher and the other lower, the high point of the guide inclined platform is arranged on the side of the U-shaped groove that is in the same direction as the rotation direction of the wind wheel, and the height difference between the high point and the low point of the guide inclined platform is set to A, where 0.1mm≤A≤40mm.
[0010] According to some embodiments of the present utility model, the inclined line type means that both side surfaces of the U-shaped groove are V-shaped linear structures, the included angle of the V-shaped linear structures is α, where 1°≤α≤150°, the inner radius of the U-shaped groove is set as R, the height of the U-shaped groove is set as B, which satisfies 1R<B≤30mm, and the included angle α is coaxial with the arc-shaped center line of the U-shaped groove.
[0011] According to some embodiments of the present utility model, the limit groove is an annular concave arc groove, and the diameter of the arc groove is smaller than the outer diameter of the rotating shaft.
[0012] According to some embodiments of the present utility model, a guide cone is arranged at the front end of the motor rotating shaft, and a guide groove is arranged on the end face of the through hole of the shaft sleeve on the side where the motor shaft is assembled.
[0013] According to some embodiments of the present utility model, the external dimension of the guide cone is smaller than the internal dimension of the guide groove, and the length of the guide cone is greater than 0.5mm.
[0014] The additional aspects and advantages of the present utility model will be partially set forth in the following description, and will partially become apparent from the following description, or be learned through the practice of the present utility model.
[0015] It has at least the following beneficial effects: This invention enables quick assembly of the motor shaft and the impeller bushing, and solves the problems of inaccurate and loose locking of the limit screws between the motor shaft and the impeller, achieving rapid installation and tightening, saving time, and ensuring quality. Attached image description: The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is an exploded view of the overall structure of the connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to an embodiment of this utility model; Figure 2 for Figure 1 Exploded view of the wind turbine and motor assembly; Figure 3 for Figure 1 A cross-sectional view of the wind turbine and motor assembly; Figure 4 for Figure 2 A partial structural diagram of the wind turbine shaft sleeve (spiral guide ramp); Figure 5 and Figure 6 for Figure 2 A partial structural diagram of the wind turbine shaft sleeve (oblique guide ramp); Figure 7 for Figure 1 An exploded view of the traditional method of assembling a motor and wind turbine.
[0016] Icon labels: Among them, 1. chassis; 2. motor; 21. shaft; 211. pin; 212. limiting groove; 213. guide cone; 22. flat shaft; 221. flat part; 3. impeller; 31. fan blade; 32. bushing; 321. U-shaped groove; 322. guide ramp; 323. guide groove; 324. through hole; 325. through hole; 33. limiting screw. Detailed Implementation
[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.
[0019] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Any mention of "first" or "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or the order of the indicated technical features.
[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0021] like Figure 1 and Figure 7 As shown, in practice, the chassis 1 is equipped with a detachable impeller 3 and a motor 2. The motor 2 drives the impeller 3 to rotate to deliver air. However, in existing technology, the motor 2 mainly uses a flat shaft 22, and the impeller bushing 32 uses a through hole 324. The flat shaft 22 is inserted into the through hole 324. However, the assembly guide of the motor flat shaft 22 and the impeller bushing 32 is generally very small. During production and installation, alignment needs to be observed. When replacing the motor after sales, in an environment where the evaporator blocks the view, it is difficult for the motor flat shaft 22 to be inserted into the through hole 324 of the bushing 32, and the flat shaft 22 cannot drive the through hole 324 to rotate. Therefore, it is often... A limiting screw 33 is installed on the bushing 32 of the impeller 3. The limiting screw 33 passes through the bushing 32 and locks onto the flat shaft 22 of the motor 2. Since the flat part 221 of the motor flat shaft 22 has only one side and the other three sides are arc surfaces, and the limiting screw 33 is installed on the bushing 32 inside the impeller 3, the limiting screw 33 will be blocked by the fan blade 31 of the impeller 3 during actual installation. It will be impossible to see whether the limiting screw 33 is aligned with the flat part 221 of the motor flat shaft 22. If the screw is locked on the arc surface of the motor flat shaft 22, the impeller 3 is prone to loosening after running for a period of time.
[0022] To address the aforementioned problems, this utility model provides a connection and fastening structure for the motor and fan wheel of an air conditioner indoor unit.
[0023] refer to Figures 1 to 6As shown, in some embodiments of the present utility model, the chassis 1 is provided with a detachable wind wheel 3 and a motor 2, the motor 2 is provided with a rotating shaft 21 which is a circular shaft, the wind wheel 3 is provided with a shaft sleeve 32, the rotating shaft 21 and the shaft sleeve 32 are coaxial, the rotating shaft 21 is inserted into the shaft sleeve 32 in an assembling manner, meanwhile, a pin 211 is arranged on the rotating shaft 21. To achieve the optimal effect of the motor 2 driving the wind wheel 3, the pin 211 is arranged to penetrate through the motor rotating shaft 21 and be symmetrically distributed on both sides, which is not limited to the symmetrical distribution here, and also includes the arrangement of the pin 211 on one side of the motor rotating shaft 21. To match the assembling effect of the pin 211, the shaft sleeve 32 is provided with a U-shaped groove 321, the U-shaped groove 321 is distributed on two sides of the end face of the shaft sleeve 32 with the hole as the center, the side surface of the U-shaped groove 321 is provided with a guiding inclined platform 322. During assembly, the pin 211 will first abut against the guiding inclined platform 322 and slide into the U-shaped groove 321, so as to realize the groove-pin fit and enable the motor 2 to drive the wind wheel 3 to rotate. Further, in some embodiments of the present utility model, the U-shaped grooves 321 are arranged on the end face of the shaft sleeve 32, the U-shaped grooves 321 are circumferentially distributed along the end face of the shaft sleeve 32, the side surface of each U-shaped groove 321 is provided with a guiding inclined platform 322, the guiding inclined platforms 322 are of a spiral type or an oblique line type, the number of the U-shaped grooves 321 is set as N pairs, and 1≤N≤10.
[0024] Further, in some embodiments of the present utility model, the spiral type means that a pair of U-shaped grooves 321 are taken as the center line, the side surfaces of the U-shaped grooves 321 are respectively provided with spiral guiding inclined platforms 322 with opposite rotation directions, one being higher and the other being lower, the high point of each guiding inclined platform 322 is arranged on the side of the U-shaped groove 321 that is in the same direction as the rotation direction of the wind wheel 3, the height difference between the high point and the low point of the guiding inclined platform 322 is set as A, and 0.1mm≤A≤40mm. During assembly, when the motor or the wind wheel is pushed by hand, the pin 211 on the motor rotating shaft 21 will first abut against the spiral guiding inclined platform 322 of the shaft sleeve 32, and under the action of the pushing force, the pin 211 will naturally slide into the U-shaped groove 321 along the guiding inclined platform 322, so as to realize quick alignment and clamping, and enable the motor to drive the wind wheel to rotate.
[0025] Further, in some embodiments of the present utility model, the oblique line type means that both side surfaces of the U-shaped groove 321 are V-shaped linear structures. In this utility model, the included angle of the V-shaped linear structures is set as α, and 1°≤α≤150°, the inner radius of the U-shaped groove 321 is set as R, the height of the U-shaped groove 321 is set as B, and 1R<B≤30mm. To achieve the assembly effect, the included angle α is set to be coaxial with the arc-shaped center line of the U-shaped groove. During assembly, when the motor or the wind wheel is pushed by hand, the pin 211 on the motor rotating shaft 21 will first abut against the oblique line type guiding inclined platform 322 of the shaft sleeve 32, and under the action of the pushing force, the pin 211 will naturally slide into the U-shaped groove 321 along the guiding inclined platform 322, so as to realize quick alignment and clamping, and enable the motor to drive the wind wheel to rotate.
[0026] Furthermore, in some embodiments of this utility model, a guide cone 213 is provided at the front end of the motor shaft 21, and a guide groove 323 is provided on the end face of the through hole 324 of the bushing 32 near the assembly side of the motor shaft 21. During assembly, the guide cone 213 is first inserted into the guide groove 323 to achieve guidance and quick alignment.
[0027] Furthermore, in some embodiments of this utility model, in order to achieve the assembly effect, the outer dimensions of the guide cone 213 are smaller than the inner dimensions of the guide groove 323, and the length of the guide cone 323 is set to be greater than 0.5 mm.
[0028] refer to Figure 1 , 2 Figure 3 As shown, in some embodiments of this utility model, to prevent the impeller 3 from axially loosening from the motor shaft 21, a limiting screw 33 is used to lock the bushing 32 and the motor shaft 21. For example, a limiting groove 212 is provided on the shaft 21. The limiting groove 212 is an annular concave arc groove, and the diameter of the limiting groove 212 is set smaller than the outer diameter of the motor shaft 21. At the same time, the impeller 3 includes a fan blade 31, and a through hole 325 is provided radially on the side of the bushing 32 near the fan blade 31 (e.g., Figure 3 As shown), a limiting screw 33 is installed on the bushing 32 through the through hole 325. When the motor 2 and the impeller 3 are installed in place, the limiting screw 33 is locked into the limiting groove 212 of the motor shaft 21 by using an electric screwdriver or screwdriver through the gap of the blades 31. For this purpose, the limiting screw 33 acts as a locking pin in the limiting groove 212 to achieve locking and locking, thereby preventing the impeller and the motor from axially loosening. At the same time, in order to ensure that the limiting screw 33 is completely locked in the limiting groove 212 of the motor shaft 21, the length of the limiting screw 33 needs to be greater than the thickness of one side of the bushing 32 to ensure that the screw can reach the limiting groove 212. The screw head of the limiting screw 33 can be flat or pointed.
[0029] Furthermore, in some embodiments of this utility model, in order to facilitate the smooth insertion of the motor shaft 21 into the through hole 324 of the impeller bushing 32, a guide cone 213 is provided at the front end of the motor shaft 21. Simultaneously, a guide groove 323 is provided on the end face of the through hole 324 of the bushing near the side where the motor shaft 21 is assembled. During actual assembly, the guide cone 213 of the motor shaft 21 first inserts into the guide groove 323 of the bushing 32, and then the motor 2 or impeller 3 is pushed. Under the action of the guide cone 213, the motor shaft 21 smoothly inserts into the through hole 324 of the impeller bushing 32, achieving rapid assembly.
[0030] This utility model not only enables the quick assembly of the motor shaft 21 and the impeller bushing 32, but also solves the problem of inaccurate and loose locking of the limiting screws 33 of the motor shaft 21 and the impeller bushing 32, thus achieving quick installation and locking, saving time and ensuring quality.
[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A connection and fastening structure for the motor and fan wheel of an air conditioner indoor unit, characterized in that, comprising a base plate, wherein the base plate is provided with a detachable wind wheel and a motor, the motor is provided with a rotating shaft, the rotating shaft is provided with a latch, the wind wheel is provided with a shaft sleeve, the shaft sleeve is provided with a U-shaped groove, a side surface of the U-shaped groove is provided with a guide inclined platform, the rotating shaft and the shaft sleeve are coaxial, the rotating shaft is assembled and inserted into the shaft sleeve, and the latch is configured to abut against the guide inclined platform and slide into the U-shaped groove during assembly.
2. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 1, characterized in that, The U-shaped groove is arranged on the end face of the shaft sleeve, the U-shaped grooves are distributed circumferentially along the end face of the shaft sleeve, the inner diameter of the U-shaped groove is in clearance fit with the outer diameter of the latch of the motor, and the guide inclined platform is of a spiral type or an inclined line type.
3. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 2, characterized in that, The number of the U-shaped grooves is set to N, and 1≤N≤10.
4. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 2, characterized in that, The spiral type takes a pair of the U-shaped grooves as a center line, two side surfaces of the U-shaped groove are respectively provided with spiral guide inclined steps with opposite rotation directions, one being high and the other being low, the high point of the guide inclined platform is arranged on the side of the U-shaped groove that is the same as the rotation direction of the wind wheel, and the height difference between the high point and the low point of the guide inclined platform is set as A, with 0.1mm≤A≤40mm.
5. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 2, characterized in that, The inclined line type means that two side surfaces of the U-shaped groove are V-shaped linear structures, the included angle of the V-shaped linear structures is α, and 1°≤α≤150°, the inner radius of the U-shaped groove is set as R, the height of the U-shaped groove is set as B, which satisfies 1R<B≤30mm, and the included angle α is coaxial with the arc-shaped center line of the U-shaped groove.
6. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 1, characterized in that, The front end of the motor rotating shaft is provided with a guide cone, and the end face of the through hole of the shaft sleeve on the side for assembling the motor shaft is provided with a guide groove.
7. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 6, characterized in that, The external dimension of the guide cone is smaller than the internal dimension of the guide groove, and the length of the guide cone is greater than 0.5MM.
8. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 1, characterized in that, The wind wheel comprises fan blades, the rotating shaft is provided with a limiting groove, the shaft sleeve is provided with a through hole in the radial direction on the side close to the fan blades, a limiting screw is mounted on the shaft sleeve, and the limiting screw passes through the through hole of the shaft sleeve and is locked in the limiting groove.
9. The connection and fastening structure between the motor and the fan wheel of an air conditioner indoor unit according to claim 8, characterized in that, The limiting groove is an annular inwardly recessed arc groove, and the diameter of the arc groove is smaller than the outer diameter of the rotating shaft.