Fan blade installation structure and air conditioner

Abstract

The present invention provides a fan blade installation structure and an air conditioner, wherein a sleeve assembly is used to connect a fan blade shaft and a motor shaft, and the sleeve assembly comprises: a fan blade sleeve, wherein the first end of the fan blade sleeve is used to connect with the fan blade shaft; and a motor sleeve, wherein the first end of the motor sleeve is used to connect with the motor shaft, and the second end of the motor sleeve is connected with the second end of the fan blade sleeve; wherein at least one of the fan blade sleeve and the motor sleeve is an injection molded part. The sleeve assembly of the present invention solves the problem that the connection structure between the motor shaft and the fan blade shaft in the prior art is relatively complicated to process.

Description

Technical Field

[0001] The present invention relates to the field of air conditioners, and in particular to a fan blade mounting structure and an air conditioner. Background Art

[0002] As a commonly used household appliance, the production and operation of air conditioners require flexible assembly of the product, so that it can be quickly assembled during production and conveniently disassembled and repaired during later operation and maintenance. As the core parts of the air conditioner, the fan blades and motor, the flexibility of the connection between the two directly affects the speed of assembly and disassembly.

[0003] The traditional air conditioner fan blade and motor connection design mainly uses the motor shaft to extend into the fan blade shaft, and then fasten the fan blade shaft and the motor shaft through fastening screws to achieve the motor driving the fan blade to rotate. This design is very inconvenient to separate and disassemble the fan blade and the motor, and also makes it difficult to separate the air duct components from the whole machine for cleaning, and separate the motor from the whole machine for maintenance. Summary of the invention

[0004] The main purpose of the present invention is to provide a fan blade installation structure and an air conditioner to solve the problem that the connection structure between the motor shaft and the fan blade shaft in the prior art is relatively complicated to process.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, a sleeve assembly is provided for connecting a fan blade shaft and a motor shaft, the sleeve assembly comprising: a fan blade sleeve, a first end of the fan blade sleeve is used to be connected to the fan blade shaft; a motor sleeve, a first end of the motor sleeve is used to be connected to the motor shaft, and a second end of the motor sleeve is connected to the second end of the fan blade sleeve; wherein at least one of the fan blade sleeve and the motor sleeve is an injection molded part.

[0006] Furthermore, at least a portion of the fan blade shaft sleeve is a tapered section.

[0007] Furthermore, the fan blade shaft sleeve includes: a first shaft section, the first shaft section is used to connect with the fan blade shaft; a second shaft section, the second shaft section is used to connect with the motor shaft sleeve; wherein, there is a conical transition between the first shaft section and the second shaft section.

[0008] Furthermore, the outer diameter of the first shaft segment is smaller than the outer diameter of the second shaft segment.

[0009] Furthermore, a plurality of inner spiral clamping teeth are arranged inside the second shaft section, and a mounting groove is arranged between two adjacent inner spiral clamping teeth; a plurality of outer spiral clamping claws are arranged on the motor shaft sleeve, and each outer spiral clamping claw is respectively clamped in a corresponding mounting groove.

[0010] According to a second aspect of the present invention, a fan blade installation structure is provided, comprising a fan blade shaft, a motor shaft and a shaft sleeve assembly, wherein the shaft sleeve assembly is used to connect the fan blade shaft and the motor shaft, and the shaft sleeve assembly is the above-mentioned shaft sleeve assembly.

[0011] Furthermore, the fan blade shaft sleeve includes: a first mounting hole, and the fan blade shaft is detachably inserted into the first mounting hole.

[0012] Furthermore, the first mounting hole is a tapered hole or a cylindrical hole.

[0013] Furthermore, a first predetermined gap a is provided between the end surface of the fan blade shaft and the bottom wall of the first mounting hole, wherein a>0.

[0014] Furthermore, a first mating platform surface is provided on the fan blade shaft, and a second mating platform surface is provided on the inner wall of the first mounting hole, and the first mating platform surface faces the second mating platform surface; wherein, there is a second predetermined gap b between the bottom end of the first mating platform surface and the bottom end of the second mating platform surface, wherein b>0.

[0015] Furthermore, the fan blade shaft and the fan blade shaft sleeve are integrally injection molded.

[0016] Furthermore, the fan blade installation structure also includes: a first fastener, which is inserted into the fan blade sleeve and the fan blade shaft; wherein an extension direction of the first fastener is consistent with an extension direction of the axis of the fan blade shaft.

[0017] Furthermore, the axis of the first fastener coincides with the axis of the fan blade shaft.

[0018] Further, a third predetermined gap c is provided between the end of the first fastener and the end of the motor sleeve, wherein c>0.

[0019] Furthermore, the fan blade shaft sleeve is threadedly connected to the fan blade shaft.

[0020] Furthermore, at least a portion of the fan blade shaft is a threaded section, and the fan blade shaft sleeve comprises: a fan blade shaft sleeve body; a first threaded portion, the first threaded portion is arranged in the fan blade shaft sleeve body, and the fan blade shaft is threadedly connected to the first threaded portion.

[0021] Furthermore, the fan blade sleeve body is injection molded on the outer surface of the first threaded portion through an injection molding process.

[0022] Furthermore, the motor sleeve is threadedly connected to the motor shaft.

[0023] Furthermore, a thread is arranged on the motor shaft, and the motor sleeve comprises: a motor sleeve body; and a second threaded portion, wherein the second threaded portion is arranged in the motor sleeve body, and the motor shaft is threadedly connected to the second threaded portion.

[0024] Furthermore, the motor sleeve body is injection molded on the outer surface of the second threaded portion by an injection molding process.

[0025] According to a third aspect of the present invention, an air conditioner is provided, comprising a fan blade mounting structure, a fan blade and a motor, wherein the fan blade is connected to the motor via the fan blade mounting structure, and the fan blade mounting structure is the above-mentioned fan blade mounting structure.

[0026] Furthermore, the air conditioner further comprises: a rubber bearing ring, which is arranged between the fan blade and the motor, and at least a part of the fan blade shaft sleeve is inserted into the rubber bearing ring, wherein the fan blade shaft sleeve and the rubber bearing ring are clearance-matched.

[0027] Furthermore, a blade end cover is provided on the blade, and the blade end cover is integrally formed with the blade shaft.

[0028] Furthermore, the fan blade end cover and the fan blade shaft are integrally injection molded.

[0029] The sleeve assembly of the present invention includes a fan blade sleeve and a motor sleeve, wherein at least one of the fan blade sleeve and the motor sleeve is an injection molded part, which can realize the rapid processing of the connection structure between the fan blade shaft and the motor shaft. With respect to the specific connection between the fan blade shaft and the motor shaft, the first end of the fan blade sleeve is used to connect with the fan blade shaft, the first end of the motor sleeve is used to connect with the motor shaft, and the second end of the motor sleeve is connected to the second end of the fan blade sleeve, thereby realizing the rapid installation of the fan blade shaft and the motor shaft. At least one of the fan blade sleeve and the motor sleeve of the sleeve assembly of the present invention is an injection molded part, which can realize the rapid processing of the connection structure between the fan blade shaft and the motor shaft, solving the problem of the complicated processing of the connection structure between the motor shaft and the fan blade shaft in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A cross-sectional schematic diagram of a shaft sleeve assembly according to the present invention is shown;

[0032] Figure 2 A schematic structural diagram of a fan blade shaft sleeve of a shaft sleeve assembly according to the present invention from a first viewing angle is shown;

[0033] Figure 3 A schematic structural diagram of a fan blade shaft sleeve of a shaft sleeve assembly according to the present invention from a second viewing angle is shown;

[0034] Figure 4 A schematic structural diagram showing a motor shaft sleeve of a shaft sleeve assembly according to the present invention from a first viewing angle is shown;

[0035] Figure 5 A schematic structural diagram of a motor shaft sleeve of a shaft sleeve assembly according to the present invention from a second viewing angle is shown;

[0036] Figure 6 The overall exploded structural diagram of the fan blade installation structure according to the present invention is shown;

[0037] Figure 7 A schematic diagram of the assembly structure of the fan blade installation structure according to the present invention is shown;

[0038] Figure 8 Shows Figure 7 A schematic diagram of the cross-sectional structure of the fan blade installation structure;

[0039] Fig. 9 A partially exploded schematic diagram of the fan blade installation structure according to the present invention is shown;

[0040] Fig.10 Shows Fig. 9 A schematic diagram of the cross-sectional structure of the fan blade installation structure;

[0041] Fig.11 Shows Fig.10 AA section structure schematic diagram of the fan blade installation structure;

[0042] Fig.12 Shows Fig.10 A schematic diagram of the BB section structure of the fan blade installation structure;

[0043] Fig.13 A schematic diagram of the installation structure of the fan blade shaft sleeve and the fan blade shaft according to the present invention is shown;

[0044] Fig.14 Shows Fig.13 Schematic diagram of CC section structure;

[0045] Fig.15 A schematic diagram of the installation structure of the fan blade and the fan blade shaft according to the present invention is shown;

[0046] Fig.16 A partial structural schematic diagram of an air conditioner according to the present invention is shown;

[0047] Fig.17 Shows Fig.16 Schematic diagram of the partial enlarged structure of the air conditioner.

[0048] The above drawings include the following reference numerals:

[0049] 10. Fan blade sleeve; 11. First mounting hole; 111. Second matching platform surface; 12. Fan blade sleeve body; 13. First threaded portion; 14. Internal spiral teeth; 15. Internal spiral surface; 16. First shaft section; 17. Second shaft section; 18. Mounting groove; 20. Motor sleeve; 21. Motor sleeve body; 22. Second threaded portion; 23. External spiral claw; 24. External spiral surface; 30. Fan blade shaft; 31. First matching platform surface; 40. Motor shaft; 50. First fastener; 60. Fan blade; 61. Fan blade end cover; 70. Motor; 80. Rubber bearing ring. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] The present invention provides a shaft sleeve assembly, please refer to Figure 1 The sleeve assembly is used to connect the fan blade shaft 30 and the motor shaft 40, and the sleeve assembly includes: a fan blade sleeve 10, a first end of the fan blade sleeve 10 is used to be connected to the fan blade shaft 30; a motor sleeve 20, a first end of the motor sleeve 20 is used to be connected to the motor shaft 40, and a second end of the motor sleeve 20 is connected to the second end of the fan blade sleeve 10; wherein, at least one of the fan blade sleeve 10 and the motor sleeve 20 is an injection molded part.

[0054] The sleeve assembly of the present invention includes a fan blade sleeve 10 and a motor sleeve 20, wherein at least one of the fan blade sleeve 10 and the motor sleeve 20 is an injection molded part, which can realize the rapid processing of the connection structure of the fan blade shaft 30 and the motor shaft 40. With respect to the specific connection between the fan blade shaft 30 and the motor shaft 40, the first end of the fan blade sleeve 10 is used to connect with the fan blade shaft 30, the first end of the motor sleeve 20 is used to connect with the motor shaft 40, and the second end of the motor sleeve 20 is connected to the second end of the fan blade sleeve 10, thereby realizing the rapid installation of the fan blade shaft 30 and the motor shaft 40. At least one of the fan blade sleeve 10 and the motor sleeve 20 of the sleeve assembly of the present invention is an injection molded part, which can realize the rapid processing of the connection structure of the fan blade shaft 30 and the motor shaft 40, and solves the problem of the complicated processing of the connection structure between the motor shaft and the fan blade shaft in the prior art.

[0055] Regarding the specific structure of the fan blade sleeve 10, Figure 2 As shown, at least a portion of the fan blade sleeve 10 is a tapered section.

[0056] Optionally, at least a portion of the fan blade sleeve 10 is a cylindrical segment.

[0057] Regarding the specific structure of the fan blade sleeve 10, Figure 2 As shown, the fan blade shaft sleeve 10 includes: a first shaft section 16, the first shaft section 16 is used to connect with the fan blade shaft 30; a second shaft section 17, the second shaft section 17 is used to connect with the motor shaft sleeve 20; wherein, there is a conical transition between the first shaft section 16 and the second shaft section 17.

[0058] In this embodiment, the fan blade sleeve 10 is composed of a first shaft segment 16 and a second shaft segment 17. The first shaft segment 16 is used to connect with the fan blade shaft 30, and the second shaft segment 17 is connected to the first shaft segment 16. The second shaft segment 17 is used to connect with the motor sleeve 20.

[0059] In this embodiment, optionally, there is an arc transition between the first shaft segment 16 and the second shaft segment 17 .

[0060] Optionally, there is a conical transition between the first shaft segment 16 and the second shaft segment 17 , that is, there is a conical transition segment between the first shaft segment 16 and the second shaft segment 17 .

[0061] Preferably, the outer diameter of the first shaft segment 16 is smaller than the outer diameter of the second shaft segment 17 .

[0062] In this embodiment, considering that it is used to connect with the fan blade shaft 30, the diameter of the fan blade shaft 30 is relatively small, and the second shaft segment 17 is used to connect with the motor shaft sleeve 20, the diameter of the motor shaft sleeve 20 is relatively large, so by setting the outer diameter value of the first shaft segment 16 to be smaller than the outer diameter value of the second shaft segment 17, it is not only beneficial to the overall installation of the structure, but also can reduce the volume of the structure to a certain extent.

[0063] In order to ensure that the motor sleeve 20 is stably connected to the fan sleeve 10, Figure 3 As shown, a plurality of inner spiral teeth 14 are arranged inside the second shaft section 17 , and a mounting groove 18 is provided between two adjacent inner spiral teeth 14 ; a plurality of outer spiral claws 23 are arranged on the motor sleeve 20 , and each outer spiral claw 23 is respectively clamped in a corresponding mounting groove 18 .

[0064] like Figure 3 and Figure 5 As shown, the fan shaft sleeve 10 is provided with an inner spiral clamping tooth 14, the inner spiral clamping teeth 14 are multiple, the multiple inner spiral clamping teeth 14 are arranged at intervals, and there is a mounting groove 18 between two adjacent inner spiral clamping teeth 14, and the side wall of the mounting groove 18 has an inner spiral surface 15. Correspondingly, the motor shaft sleeve 20 is provided with an outer spiral clamping claw 23, the outer spiral clamping claw 23 is multiple, each outer spiral clamping claw 23 is arranged at intervals, and each outer spiral clamping claw 23 is respectively clamped in the corresponding mounting groove 18, wherein the top end of the outer spiral clamping claw 23 has an outer spiral surface 24.

[0065] In this embodiment, the three inner spiral teeth 14 of the fan shaft sleeve 10 have a mating surface that is a spiral surface. This spiral surface is mated with the spiral surface of the outer spiral claw 23 of the motor shaft sleeve 20, which can ensure that the two are tightly mated when connected to form a self-locking connection. This design can avoid the problem of the fan blade and the motor being separated by themselves due to the small axial force generated by the fan blade itself when the fan blade stops rotating, and the spiral claw-type mating structure can be easily separated when subjected to a large axial separation force (the axial separation force artificially applied during disassembly, this large separation force is only relative to the self-separation force generated during the fan blade stopping process, and this force is within a generally acceptable range for the disassembly operator).

[0066] In this embodiment, considering that the inner spiral teeth 14 are provided inside the second shaft segment 17 , the outer diameter of the second shaft segment 17 is set to be greater than the outer diameter of the first shaft segment 16 , so as to ensure the stability of the structure.

[0067] With regard to the specific materials of the fan blade shaft sleeve 10 and the motor shaft sleeve 20 , at least one of the fan blade shaft sleeve 10 and the motor shaft sleeve 20 is a plastic injection molded part or a rubber injection molded part.

[0068] Optionally, at least one of the fan blade shaft sleeve 10 and the motor shaft sleeve 20 is a plastic injection molded part.

[0069] Optionally, at least one of the fan blade sleeve 10 and the motor sleeve 20 is a rubber injection molded part.

[0070] The fan shaft sleeve 10 and the motor shaft sleeve 20 are both made of injection molding. The injection molding material may be special plastics such as PPA, modified POM, etc., but is not specifically limited to a certain material, and may also be other injection molding materials that can replace steel with plastic.

[0071] Preferably, the second end of the motor shaft sleeve 20 is detachably connected to the second end of the fan blade shaft sleeve 10 .

[0072] Preferably, at least a portion of the motor shaft sleeve 20 is clearance-matched with at least a portion of the fan blade shaft sleeve 10 .

[0073] The present invention also provides a fan blade installation structure, please refer to Figures 1 to 16 The fan blade installation structure includes a fan blade shaft 30, a motor shaft 40 and a shaft sleeve assembly. The shaft sleeve assembly is used to connect the fan blade shaft 30 and the motor shaft 40, and the shaft sleeve assembly is the above-mentioned shaft sleeve assembly.

[0074] In order to achieve the connection between the fan blade shaft 30 and the fan blade shaft sleeve 10, as shown in FIG. Figure 1 As shown, the fan blade shaft sleeve 10 includes: a first mounting hole 11, and the fan blade shaft 30 is detachably inserted into the first mounting hole 11.

[0075] In this embodiment, the first mounting hole 11 is provided on the fan blade shaft sleeve 10 , and the fan blade shaft 30 is detachably inserted into the first mounting hole 11 .

[0076] Preferably, the first mounting hole 11 is a tapered hole or a cylindrical hole.

[0077] Considering the convenience of installation, the fan blade sleeve 10 is a tapered section, and the first installation hole 11 is a tapered hole.

[0078] The mating surface between the outer circumference of the fan blade shaft 30 and the first mounting hole 11 of the fan blade sleeve 10, and the mating surface between the outer circumference of the motor sleeve 20 and the right shaft hole of the fan blade sleeve 10 are all conical surfaces. The outer diameter of the shaft end of this design will be smaller than the hole diameter of the shaft hole end of the sleeve. It is very convenient to assemble the large hole sleeve with the small shaft during assembly, and the conical surface plays a role in centering and correction during the assembly process, so that the final assembly exhibits better coaxiality, preventing shaft runout caused by axis deviation in later operation, which affects the operation and life of the whole machine.

[0079] Preferably, there is a first predetermined gap a between the end surface of the fan blade shaft 30 and the bottom wall of the first mounting hole 11, wherein a>0.

[0080] In this embodiment, by making the first predetermined gap a between the end face of the fan blade shaft 30 and the bottom wall of the first mounting hole 11 greater than 0, the fan blade shaft 30 is prevented from contacting the bottom wall of the first mounting hole 11, thereby causing unnecessary wear, while ensuring that the fan blade shaft 30 can be inserted into the first mounting hole 11.

[0081] For the stability of the match, Figure 1 and Fig.11 As shown, a first mating platform surface 31 is provided on the fan blade shaft 30, and a second mating platform surface 111 is provided on the inner wall of the first mounting hole 11, and the first mating platform surface 31 faces the second mating platform surface 111; wherein, a second predetermined gap b is provided between the bottom end of the first mating platform surface 31 and the bottom end of the second mating platform surface 111, wherein b>0.

[0082] In this embodiment, the first mating platform surface 31 faces the second mating platform surface 111 , that is, the first mating platform surface 31 and the second mating platform surface 111 are arranged opposite to each other, and the first mating platform surface 31 and the second mating platform surface 111 are perpendicular to the same straight line.

[0083] In this embodiment, the bottom end of the first mating platform surface 31 is the end of the first mating platform surface 31 away from the motor sleeve 20 , and the bottom end of the second mating platform surface 111 is the end of the second mating platform surface 111 close to the motor sleeve 20 .

[0084] In this embodiment, there is a second predetermined gap b between the bottom end of the first mating platform surface 31 and the bottom end of the second mating platform surface 111. By setting b>0, the fan blade shaft 30 is prevented from being in limited contact with the fan blade sleeve 10 while ensuring that the fan blade shaft 30 is assembled in place.

[0085] Preferably, there is a first predetermined gap a between the end surface of the fan blade shaft 30 and the bottom wall of the first mounting hole 11, wherein b>a>0.

[0086] In this embodiment, by setting b>a>0, it is possible to ensure that the fan blade shaft 30 is stably connected to the fan blade shaft sleeve 10 and avoid the fan blade shaft 30 being stuck to the fan blade shaft sleeve 10.

[0087] Preferably, the fan blade shaft 30 and the fan blade shaft sleeve 10 are integrally injection molded.

[0088] In this embodiment, the fan blade shaft 30 and the fan blade shaft sleeve 10 are integrally injection-molded, thereby improving the installation efficiency and facilitating the rapid connection of the overall structure.

[0089] In order to ensure the stable connection between the fan blade sleeve 10 and the fan blade shaft 30, as shown in FIG. Figure 6 and Figure 7 As shown, the fan blade installation structure also includes: a first fastener 50, which is inserted into the fan blade sleeve 10 and the fan blade shaft 30; wherein the extension direction of the first fastener 50 is consistent with the extension direction of the axis of the fan blade shaft 30.

[0090] In this embodiment, a first fastener 50 is provided on the fan blade mounting structure, wherein the first fastener 50 is passed through the fan blade sleeve 10 and the fan blade shaft 30 , thereby achieving a stable connection between the fan blade sleeve 10 and the fan blade shaft 30 through the first fastener 50 .

[0091] In this embodiment, the extension direction of the first fastener 50 is consistent with the extension direction of the axis of the fan blade shaft 30, so that the first fastener 50 achieves a stable connection between the fan blade sleeve 10 and the fan blade shaft 30 through the axial position.

[0092] Preferably, the axis of the first fastener 50 coincides with the axis of the blade shaft 30 .

[0093] Preferably, there is a third predetermined gap c between the end of the first fastener 50 and the end of the motor sleeve 20 , wherein c>0.

[0094] In this embodiment, the first fastener 50 is a screw.

[0095] In this embodiment, the first fastener 50 is threadedly connected to the fan blade sleeve 10 .

[0096] In this embodiment, the left end face of the fan blade sleeve 10 and the matching end face of the fan blade shaft 30, and the right end face of the fan blade sleeve 10 and the matching end face of the motor sleeve 20 are all zero-matched. The matching clearance between the front end face of the fan blade shaft 30 and the inner end face of the left shaft hole of the fan blade sleeve 10 is smaller than the clearance value between the end face of the shaft matching platform and the end face of the matching platform of the shaft hole of the fan blade sleeve. At the same time, the top of the fan blade sleeve axial connecting screw and the end of the motor sleeve, the spiral claw of the motor sleeve and the right spiral surface of the fan blade sleeve are all clearance matched. The design of this matching gap size relationship ensures that the fan blade shaft can be assembled in place and the shaft end will not support the sleeve, ensuring that the spiral claw of the motor sleeve assembly can be fully assembled into the inside of the fan blade sleeve to realize axial driving of the fan blade to rotate, and the clearance match of the axis effectively eliminates the axial vibration transmitted through the axis during operation.

[0097] In another connection mode between the fan blade shaft sleeve 10 and the fan blade shaft 30 , the fan blade shaft sleeve 10 and the fan blade shaft 30 are threadedly connected.

[0098] Regarding the specific structure of the fan blade sleeve 10, Fig.14 As shown, at least part of the fan blade shaft 30 is a threaded section, and the fan blade shaft sleeve 10 includes: a fan blade shaft sleeve body 12; a first threaded portion 13, the first threaded portion 13 is arranged in the fan blade shaft sleeve body 12, and the fan blade shaft 30 is threadedly connected to the first threaded portion 13.

[0099] In this embodiment, the fan blade sleeve 10 includes a fan blade sleeve body 12 and a first threaded portion 13 , wherein the first threaded portion 13 is disposed in the fan blade sleeve body 12 , and the fan blade shaft 30 is threadedly connected to the first threaded portion 13 .

[0100] In order to improve processing efficiency, the fan blade sleeve body 12 is injection molded on the outer surface of the first threaded portion 13 through an injection molding process.

[0101] In this embodiment, the embedded nut (first threaded portion 13) is coaxial with the sleeve injection molding body (blade sleeve body 12) inside the injection molding body. The control accuracy of this coaxiality is relatively high in precision injection molding production. At the same time, after the nut and the thread are tightened and connected, the coaxiality of the blade shaft and the external sleeve can also be guaranteed. The coaxiality of the connecting shaft and the sleeve of the fan blade assembly obtained in this way.

[0102] Preferably, the motor sleeve 20 is threadedly connected to the motor shaft 40 .

[0103] Regarding the specific structure of the motor sleeve 20, such as Fig.12 As shown, the motor shaft 40 is provided with threads, and the motor sleeve 20 includes: a motor sleeve body 21; a second threaded portion 22, the second threaded portion 22 is provided in the motor sleeve body 21, and the motor shaft 40 is threadedly connected to the second threaded portion 22.

[0104] In this embodiment, the motor sleeve 20 includes a motor sleeve body 21 and a second threaded portion 22 , wherein the second threaded portion 22 is disposed in the motor sleeve body 21 , and the motor shaft 40 is threadedly connected to the second threaded portion 22 .

[0105] Preferably, the motor sleeve body 21 is injection molded on the outer surface of the second threaded portion 22 by an injection molding process.

[0106] The present invention also provides an air conditioner, such as Fig.16 and Fig.17 As shown, the air conditioner includes a fan blade mounting structure, a fan blade 60 and a motor 70. The fan blade 60 is connected to the motor 70 via the fan blade mounting structure. The fan blade mounting structure is the above-mentioned fan blade mounting structure.

[0107] Preferably, if Fig.16 and Fig.17 As shown, the air conditioner further includes: a rubber bearing ring 80, which is arranged between the fan blade 60 and the motor 70, and at least a part of the fan blade sleeve 10 is inserted into the rubber bearing ring 80, wherein the fan blade sleeve 10 and the rubber bearing ring 80 are clearance-matched.

[0108] During the assembly of the whole machine, when the fan blade assembly moves to the left as a whole during the disassembly operation, the conical surface of the outer surface of the fan blade sleeve can gradually reduce the fitting clearance between the sleeve and the rubber bearing ring 80 during the separation process of the fan blade shaft, and finally form a slight interference fit between the outer conical surface of the fan blade sleeve and the inner hole surface of the rubber bearing ring. In this way, the circumferential shrinkage during the separation process also ensures the coaxiality of the entire assembly, so as not to affect the coaxiality of the assembly after the assembly is complete in the later stage during the disassembly.

[0109] After the fan blade assembly is connected to the motor assembly and assembled in place, there is a clearance fit between the outer surface of the fan blade sleeve and the rubber bearing ring. This design directly eliminates the mechanical friction between the fan blade sleeve and the rubber bearing ring during operation. Even if there is a slight shaft runout during operation, the sleeve will not be worn or collided, thus avoiding mechanical contact caused by various external factors. This not only ensures the reliability of the whole machine operation and extends the life of the whole machine, but also prevents noise generated by mechanical friction, greatly improving the noise quality of operation.

[0110] Preferably, a blade end cover 61 is provided on the blade 60 , and the blade end cover 61 is integrally formed with the blade shaft 30 .

[0111] Preferably, the fan blade end cover 61 and the fan blade shaft 30 are integrally injection molded.

[0112] Preferably, the fan blade shaft 30 and the fan blade shaft sleeve 10 are integrally injection molded.

[0113] The fan blade end cover 61 and the fan blade shaft 30 are integrally injection molded, directly eliminating the assembly of the connecting shaft in the pre-assembly of the fan blade assembly, greatly simplifying the assembly operation and further improving production efficiency. Due to the integrated design of the fan blade, the incoming materials are directly complete fan blade assemblies that can be directly assembled during production at the assembly plant. In addition, since the control accuracy of this coaxiality in precision injection molding production is high and does not involve the subsequent assembly of the fan blade shaft and the fan blade sleeve, the coaxiality influencing factors are further eliminated, enabling the whole machine assembly to obtain better assembly characteristics.

[0114] Injection molding design is adopted for the fan blade sleeve (or the integrally formed part of the fan blade connecting shaft and the fan blade end cover) and the motor sleeve. The injection molding material can be: special plastics such as PPA, modified POM, etc., but it is not specifically limited to a certain material, and can also be other injection moldable materials that can replace steel with plastic.

[0115] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0116] The sleeve assembly of the present invention includes a fan blade sleeve 10 and a motor sleeve 20, wherein at least one of the fan blade sleeve 10 and the motor sleeve 20 is an injection molded part, which can realize the rapid processing of the connection structure of the fan blade shaft 30 and the motor shaft 40. With respect to the specific connection between the fan blade shaft 30 and the motor shaft 40, the first end of the fan blade sleeve 10 is used to connect with the fan blade shaft 30, the first end of the motor sleeve 20 is used to connect with the motor shaft 40, and the second end of the motor sleeve 20 is connected to the second end of the fan blade sleeve 10, thereby realizing the rapid installation of the fan blade shaft 30 and the motor shaft 40. At least one of the fan blade sleeve 10 and the motor sleeve 20 of the sleeve assembly of the present invention is an injection molded part, which can realize the rapid processing of the connection structure of the fan blade shaft 30 and the motor shaft 40, and solves the problem of the complicated processing of the connection structure between the motor shaft and the fan blade shaft in the prior art.

[0117] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0118] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fan blade installation structure, comprising a fan blade shaft (30), a motor shaft (40) and a shaft sleeve assembly, wherein the shaft sleeve assembly is used to connect the fan blade shaft (30) and the motor shaft (40); characterized in that: The sleeve assembly comprises: A fan blade shaft sleeve (10), wherein a first end of the fan blade shaft sleeve (10) is used to be connected to the fan blade shaft (30); A motor shaft sleeve (20), wherein a first end of the motor shaft sleeve (20) is used to be connected to the motor shaft (40), and a second end of the motor shaft sleeve (20) is connected to a second end of the fan blade shaft sleeve (10); Wherein, at least one of the fan blade shaft sleeve (10) and the motor shaft sleeve (20) is an injection molded part; The fan blade shaft sleeve (10) comprises: a first mounting hole (11), wherein the fan blade shaft (30) is detachably inserted into the first mounting hole (11); A first predetermined gap a is provided between the end surface of the fan blade shaft (30) and the bottom wall of the first mounting hole (11), wherein a>0; A first mating platform surface (31) is provided on the fan blade shaft (30), and a second mating platform surface (111) is provided on the inner wall of the first mounting hole (11), and the first mating platform surface (31) faces the second mating platform surface (111); wherein a second predetermined gap b is provided between the bottom end of the first mating platform surface (31) and the bottom end of the second mating platform surface (111), wherein b>0.

2. The fan blade installation structure according to claim 1, characterized in that: At least a portion of the fan blade shaft sleeve (10) is a tapered section.

3. The fan blade installation structure according to claim 1, characterized in that: The fan blade shaft sleeve (10) comprises: A first shaft section (16), the first shaft section (16) being used to be connected to the fan blade shaft (30); A second shaft section (17), the second shaft section (17) being used to be connected to the motor shaft sleeve (20); There is a conical transition between the first shaft section (16) and the second shaft section (17).

4. The fan blade installation structure according to claim 3, characterized in that: The outer diameter of the first shaft section (16) is smaller than the outer diameter of the second shaft section (17).

5. The fan blade installation structure according to claim 3 or 4, characterized in that: A plurality of internal spiral clamping teeth (14) are arranged inside the second shaft section (17), and a mounting groove (18) is provided between two adjacent internal spiral clamping teeth (14); a plurality of external spiral clamping claws (23) are arranged on the motor shaft sleeve (20), and each of the external spiral clamping claws (23) is respectively clamped in a corresponding mounting groove (18).

6. The fan blade installation structure according to claim 1, characterized in that: The first mounting hole (11) is a conical hole or a cylindrical hole.

7. The fan blade installation structure according to claim 1, characterized in that: The fan blade installation structure also includes: A first fastener (50), the first fastener (50) being inserted through the fan blade shaft sleeve (10) and the fan blade shaft (30); Wherein, the extension direction of the first fastener (50) is consistent with the extension direction of the axis of the fan blade shaft (30).

8. The fan blade installation structure according to claim 7, characterized in that: The axis of the first fastener (50) coincides with the axis of the fan blade shaft (30).

9. The fan blade installation structure according to claim 7 or 8, characterized in that: A third predetermined gap c is provided between the end of the first fastener (50) and the end of the motor shaft sleeve (20), wherein c>0.

10. The fan blade installation structure according to claim 1, characterized in that: The motor shaft sleeve (20) is threadedly connected to the motor shaft (40).

11. The fan blade installation structure according to claim 10, characterized in that: The motor shaft (40) is provided with a thread, and the motor shaft sleeve (20) comprises: Motor sleeve body (21); A second threaded portion (22), wherein the second threaded portion (22) is disposed in the motor shaft sleeve body (21), and the motor shaft (40) is threadably connected to the second threaded portion (22).

12. The fan blade installation structure according to claim 11, characterized in that: The motor shaft sleeve body (21) is injection-molded onto the outer surface of the second threaded portion (22) through an injection molding process.

13. An air conditioner, comprising a fan blade mounting structure, a fan blade (60) and a motor (70), wherein the fan blade (60) is connected to the motor (70) via the fan blade mounting structure, and characterized in that: The fan blade installation structure is the fan blade installation structure according to any one of claims 1 to 12.

14. The air conditioner according to claim 13, characterized in that: The air conditioner also includes: A rubber bearing ring (80), wherein the rubber bearing ring (80) is arranged between the fan blade (60) and the motor (70), and at least a portion of the fan blade shaft sleeve (10) is inserted into the rubber bearing ring (80), wherein the fan blade shaft sleeve (10) and the rubber bearing ring (80) are clearance-matched.

15. The air conditioner according to claim 13, characterized in that: The fan blade (60) is provided with a fan blade end cover (61), and the fan blade end cover (61) is integrally formed with the fan blade shaft (30).

16. The air conditioner according to claim 15, characterized in that: The fan blade end cover (61) and the fan blade shaft (30) are integrally injection molded.

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