Connecting structure of motor shaft and fan blade shaft sleeve and air conditioner

Abstract

The utility model provides a connecting structure of a motor shaft and a fan blade shaft sleeve and an air conditioner, and relates to the technical field of air conditioners. The connecting structure of the motor shaft and the fan blade shaft sleeve comprises a connecting screw, the fan blade shaft sleeve with a shaft hole and the motor shaft with the shaft side wall provided with a positioning plane, a threaded hole crossed with the shaft hole is formed in the outer side wall of the fan blade shaft sleeve, and the threaded hole deviates from the axis of the shaft hole and penetrates through the peripheral area of the shaft hole to form a communicating opening; the motor shaft is inserted into the shaft hole in a matched mode, and the positioning plane corresponds to the communicating opening. The connecting screw is screwed to the threaded hole, the screwing range covers the area where the communicating opening is located, and the peripheral wall of the connecting screw is tangent to the positioning plane. According to the connecting structure of the motor shaft and the fan blade shaft sleeve, the requirement for the orientation accuracy of the motor shaft inserted into the shaft hole is low, the locking stability of the connecting screws to the motor shaft is high, the mute effect in the operation process can be ensured, and the after-sales maintenance rate can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, and in particular to a connection structure between a motor shaft and a fan blade bushing and an air conditioner. Background Art

[0002] Air conditioners are widely used for adjusting the indoor environmental temperature. Among them, a fan is generally used as a power component in an air conditioner to drive air flow through its air duct to complete heat exchange and achieve temperature adjustment. Specifically, the fan includes a motor and a fan blade, and the fan blade is generally connected to the motor shaft of the motor through a fan blade bushing. The motor drives the fan blade to rotate through its motor shaft to drive the air flow. In the prior art, a threaded hole extending radially along the outer peripheral wall of the fan blade bushing is generally provided, and a connecting screw is screwed into the threaded hole and abuts against the positioning plane of the motor shaft to achieve circumferential locking of the motor shaft and the fan blade bushing. However, when assembling this connection structure, the accuracy requirement for the orientation of inserting the motor shaft into the shaft hole is relatively high. When the positioning plane deflects and inclines relative to the threaded hole, the connecting screw is likely to get stuck during the process of screwing into the threaded hole and cannot lock the positioning plane. Moreover, during subsequent operation, the positioning plane returns to the correct position with vibration, the connecting screw loosens, and the motor shaft can deflect relative to the shaft hole, resulting in a relatively large noise problem during operation and a high after-sales repair rate. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a connection structure between a motor shaft and a fan blade bushing and an air conditioner to solve the technical problems in the existing connection structure between a motor shaft and a fan blade bushing, where the accuracy requirement for the orientation of inserting the motor shaft into the shaft hole is relatively high, and a relatively large noise problem is likely to occur during operation, resulting in a high after-sales repair rate.

[0004] To solve the above problems, the utility model provides a connection structure between a motor shaft and a fan blade bushing, including a connecting screw, a fan blade bushing with a shaft hole, and a motor shaft with a positioning plane on the shaft side wall. The outer side wall of the fan blade bushing is provided with a threaded hole intersecting the shaft hole. The threaded hole deviates from the axis of the shaft hole and penetrates through the peripheral area of the shaft hole to form a communication port. The motor shaft is fitted and inserted into the shaft hole, and the positioning plane corresponds to the communication port. The connecting screw is screwed into the threaded hole and the screwing range covers the area where the communication port is located, and the outer peripheral wall of the connecting screw is tangent to the positioning plane.

[0005] In the connection structure between the motor shaft and the impeller shaft sleeve provided by the present utility model, on the one hand, during the process of assembling the motor shaft, the impeller shaft sleeve and the connecting screw, it is only necessary to ensure that the screwing range of the connecting screw into the threaded hole covers the area where the communication port is located. The connecting screw can be tangent to the entire area of the positioning plane along the axial direction of the connecting screw on one side, thereby effectively limiting the positioning plane and preventing the positioning plane from deflecting relative to the connecting screw, and correspondingly preventing the motor shaft from deflecting relative to the shaft hole, so as to achieve stable circumferential locking of the motor shaft and the impeller shaft sleeve, reduce the occurrence of deflection of the motor shaft relative to the impeller shaft sleeve during subsequent use, correspondingly ensure the silent effect of the operation at the connection between the motor shaft and the impeller shaft sleeve, and reduce the after-sales maintenance rate; on the other hand, during the process of screwing the connecting screw into the threaded hole, when one end of the positioning plane facing away from the orifice of the threaded hole inclines a certain angle towards the inside of the threaded hole, as the connecting screw is screwed in, the screwing end of the connecting screw can abut against and correct the positioning plane to rotate to the tangent position, thereby playing a certain role in correcting the circumferential angle of the motor shaft during the assembly process. Correspondingly, on the basis of realizing the tangential fit and limiting of the connecting screw and the positioning plane, the accuracy requirement for the orientation of the motor shaft inserted into the shaft hole is reduced, and thus the assembly convenience of the motor shaft and the impeller shaft sleeve is improved.

[0006] Optionally, the connecting screw is in interference fit with the positioning plane.

[0007] Optionally, the threaded hole completely penetrates the impeller shaft sleeve.

[0008] Optionally, the axis of the threaded hole is perpendicular to the axis of the shaft hole.

[0009] Optionally, the extension length of the communication port along the axial direction of the threaded hole is not less than half of the aperture of the shaft hole.

[0010] Optionally, the aperture of the threaded hole is 0.3 - 0.8 times the aperture of the shaft hole.

[0011] Optionally, the outer peripheral surface of the connecting screw includes a guiding taper section, and the reduced end of the guiding taper section is flush with the end face of the screwing end of the connecting screw.

[0012] Optionally, the positioning plane extends along the axial direction of the motor shaft to the end face of the insertion end of the motor shaft.

[0013] Optionally, a lock glue is filled between the threaded hole and the connecting screw.

[0014] The present utility model also provides an air conditioner, including a housing, a cross-flow impeller, a motor and a connecting screw. The cross-flow impeller is rotatably connected in the housing, the motor is arranged in the housing, and the motor shaft of the motor, the impeller shaft sleeve of the cross-flow impeller and the connecting screw adopt the above connection structure.

[0015] In the air conditioner provided in this embodiment, the motor shaft of the motor and the blade bushing of the cross-flow fan adopt the above connection structure, which can not only ensure the circumferential stable locking of the motor shaft and the blade bushing, reduce the occurrence of the deflection of the motor shaft relative to the blade bushing during subsequent use, correspondingly ensure the quiet operation effect at the connection of the motor shaft and the blade bushing, and reduce the after-sales maintenance rate; moreover, during the assembly process, the connecting screw can also play a certain role in correcting the circumferential angle of the motor shaft. Correspondingly, on the basis of realizing the tangential fit and limit of the connecting screw and the positioning plane, the accuracy requirement for the orientation of the motor shaft inserted into the shaft hole is reduced, thereby improving the assembly convenience of the motor shaft and the blade bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0017] Figure 1 Isometric schematic diagram of the assembly process of the motor and the cross-flow fan in the air conditioner provided by the present invention;

[0018] Figure 2 Is Figure 1 Partial isometric schematic diagram of the motor and the cross-flow fan in

[0019] Figure 3 Is Figure 1 Radial cross-sectional schematic diagram of the assembly process of the motor shaft, shaft hole and connecting screw in , wherein the positioning plane is approximately coplanar with the plane where the communication port is located;

[0020] Figure 4 Is Figure 1 Radial cross-sectional schematic diagram of the assembly process of the motor shaft, shaft hole and connecting screw in , wherein the bottom end of the positioning plane deflects towards the communication port;

[0021] Figure 5 Partial isometric assembly schematic diagram of the motor and the cross-flow fan in the air conditioner provided by the present invention;

[0022] Figure 6 Is Figure 5 Axial isometric cross-sectional view after the assembly of the motor shaft, shaft hole and connecting screw in ;

[0023] Figure 7 Is Figure 5 Radial cross-sectional schematic diagram after the assembly of the motor shaft, shaft hole and connecting screw in ;

[0024] Figure 8The partial axonometric schematic diagrams before and after the connecting screw of the air conditioner provided by the present utility model is assembled into the threaded hole.

[0025] Explanation of reference numerals:

[0026] 100 - Cross - flow fan blade; 110 - Fan blade bushing; 111 - Axial hole; 112 - Threaded hole; 113 - Communication port; 200 - Motor; 210 - Motor shaft; 211 - Positioning plane; 300 - Connecting screw; 310 - Guide cone section. Specific embodiments

[0027] In order to make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] This embodiment provides a connection structure between the motor shaft and the fan blade bushing. As Figures 5 - 7 shown, it includes a connecting screw 300, a fan blade bushing 110 having an axial hole 111, and a motor shaft 210 with a positioning plane 211 provided on the shaft side wall. The outer side wall of the fan blade bushing 110 is provided with a threaded hole 112 intersecting the axial hole 111. The threaded hole 112 deviates from the axis of the axial hole 111 and penetrates through the peripheral area of the axial hole 111 to form a communication port 113; the motor shaft 210 is fitted and inserted into the axial hole 111, and the positioning plane 211 corresponds to the communication port 113; the connecting screw 300 is screwed into the threaded hole 112 and the screwing range covers the area where the communication port 113 is located, and the outer peripheral wall of the connecting screw 300 is tangent to the positioning plane 211.

[0029] The connection structure provided by this embodiment is applied to the connection between the motor 200 and the fan blade. Among them, one end of the fan blade in the axial direction is provided with a fan blade bushing 110. The inside of the fan blade bushing 110 encloses an axial hole 111 coaxial with it. The outer side wall of the fan blade bushing 110 is provided with a threaded hole 112. The axis of the threaded hole 112 is non - parallel to the axis of the axial hole 111. The entire hole body area of the threaded hole 112 is located outside the axis of the axial hole 111, and the threaded hole 112 intersects and penetrates the edge area of the axial hole 111 facing the threaded hole 112, so as to form a planar communication port 113 at the connection; the motor shaft 210, as the output shaft of the motor 200, has an outer diameter matching the aperture of the axial hole 111. A partial area of the shaft side wall of the motor shaft 210 is a planar area to form a positioning plane 211; the outer peripheral wall of the connecting screw 300 is provided with an external thread adapted to the threaded hole 112.

[0030] During connection, as Figures 1 - 4 、 Figure 8As shown, the motor shaft 210 can be fitted and inserted into the shaft hole 111, and it is ensured that the positioning plane 211 faces the communication port 113. Then, the screwed end of the connecting screw 300 is inserted into the threaded hole 112 and screwed in. Among them, when the positioning plane 211 is approximately coplanar with the plane where the communication port 113 is located, the outer contour of the positioning plane 211 is tangent to the hole side wall of the threaded hole 112, and the connecting screw 300 can be directly screwed into the threaded hole 112, and the screwing range of the connecting screw 300 in the threaded hole 112 covers the area where the communication port 113 is located; when one end of the positioning plane 211 facing away from the orifice of the threaded hole 112 is inclined towards the threaded hole 112 and forms a certain inclination angle with the communication port 113, as the connecting screw 300 is screwed in, when the screwed end of the connecting screw 300 abuts against the positioning plane 211, the downward pressing force exerted on the positioning plane 211 at the abutting position can be decomposed into a first component force extending along the positioning plane 211 and a second component force perpendicular to the positioning plane 211. Among them, the second component force can push the positioning plane 211 to rotate relative to the shaft hole 111, and as the connecting screw 300 continues to be screwed in, the positioning plane 211 continuously rotates under the abutting action of the connecting screw 300 until the positioning plane 211 rotates to a position coplanar with the plane where the communication port 113 is located, and the screwing range of the connecting screw 300 in the threaded hole 112 covers the area where the communication port 113 is located; at this time, the outer contour of the connecting screw 300 facing the outer peripheral wall area of the communication port 113 is an arc surface, and this arc surface is tangent to the positioning plane 211, and the tangent area is a straight line segment extending along the axial direction of the connecting screw 300. Since this straight line segment is non-parallel to the axis of the shaft hole 111, the outer peripheral wall of the connecting screw 300 can play a limiting role on the positioning plane 211, effectively preventing the positioning plane 211 from deflecting relative to this straight line segment, and correspondingly preventing the motor shaft 210 from deflecting relative to the shaft hole 111, thereby realizing the circumferential connection and locking of the motor shaft 210 and the impeller shaft sleeve 110.

[0031] In the connection structure between the motor shaft and the fan blade bushing provided in this embodiment, on the one hand, during the process of assembling the motor shaft 210, the fan blade bushing 110, and the connection screw 300, it is only necessary to ensure that the screwing range of the connection screw 300 into the threaded hole 112 covers the area where the communication port 113 is located. Then, the connection screw 300 can be tangent to the entire area of the positioning plane 211 along the axial direction of the connection screw 300 on one side, thereby effectively limiting the positioning plane 211 and preventing the positioning plane 211 from deflecting relative to the connection screw 300. Correspondingly, it prevents the motor shaft 210 from deflecting relative to the shaft hole 111, thus realizing stable circumferential locking of the motor shaft 210 and the fan blade bushing 110, reducing the occurrence of deflection of the motor shaft 210 relative to the fan blade bushing 110 during subsequent use, correspondingly ensuring the quiet operation effect at the connection between the motor shaft 210 and the fan blade bushing 110, and reducing the after-sales maintenance rate. On the other hand, during the process of screwing the connection screw 300 into the threaded hole 112, when one end of the positioning plane 211 facing away from the orifice of the threaded hole 112 is inclined at a certain angle towards the inside of the threaded hole 112, as the connection screw 300 is screwed in, the screwing end of the connection screw 300 can abut against and correct the positioning plane 211 to rotate to the tangent position, thereby playing a certain role in correcting the circumferential angle of the motor shaft 210 during the assembly process. Correspondingly, on the basis of realizing the tangent fit and limit between the connection screw 300 and the positioning plane 211, the accuracy requirement for the orientation of the motor shaft 210 inserted into the shaft hole 111 is reduced, and thus the assembly convenience of the motor shaft 210 and the fan blade bushing 110 is improved.

[0032] Of course, it should be noted that the above description of the assembly sequence of the motor shaft 210 and the connection screw 300 is only one possible introduction and is not a limitation; in other embodiments, the connection screw 300 can also be screwed into the screw hole to a depth that does not reach the communication port 113 first, and then after the motor shaft 210 is inserted into the shaft hole 111, the connection screw 300 is rotated again so that its screwing range covers the communication port 113.

[0033] Optionally, in this embodiment, the connection screw 300 and the positioning plane 211 are in interference fit. The outer peripheral wall of the connection screw 300 abuts against the positioning plane 211 in the area corresponding to the communication port 113, and the two are in an abutting and limiting state, thereby further increasing the contact area and limiting effect between the connection screw 300 and the positioning plane 211, reducing the noise problem caused by the loosening of the connection screw 300 during use, resulting in the deflection of the positioning plane 211 and the motor shaft 210, correspondingly further ensuring the connection stability between the motor shaft 210 and the fan blade bushing 110 and the quiet operation effect during use, and reducing the after-sales maintenance rate.

[0034] In this embodiment, the threaded hole 112 completely penetrates the airfoil shaft sleeve 110. On the one hand, when machining the threaded hole 112, it is only necessary to determine the opening position and angle of the threaded hole 112, without limiting the machining depth of the threaded hole 112, as long as it penetrates the airfoil shaft sleeve 110, thereby improving the machining convenience of the threaded hole 112; on the other hand, a connecting screw 300 with a relatively large length is selected to be screwed into the threaded hole 112. After passing through the communication port 113, the connecting screw 300 still has a certain length. During use, even if the connecting screw 300 loosens to a certain extent under the action of vibration, the connecting screw 300 can still fully cover the area where the communication port 113 is located. Correspondingly, the connecting screw 300 can still make full contact and limit the positioning plane 211 along the axial direction, thereby further improving the locking stability of the connecting screw 300 to the positioning plane 211, to the motor shaft 210 and the airfoil shaft sleeve 110, and correspondingly further reducing the probability of noise problems caused by the loosening of the motor shaft 210 relative to the airfoil shaft sleeve 110, and further reducing the after-sales maintenance rate.

[0035] Specifically, in this embodiment, the plane where the communication port 113 is located is parallel to the axis of the shaft hole 111. Correspondingly, the positioning plane 211 is parallel to the axis of the motor shaft 210. Then, the orientation of the positioning plane 211 relative to the motor shaft 210 is easier to determine, and the orientation accuracy is easier to guarantee, thereby improving the machining convenience and machining accuracy of the positioning plane 211, ensuring the cooperation between the positioning plane 211 and the communication port 113 and the connecting screw 300, improving the assembly convenience and assembly firmness of this connection structure, and reducing the processing cost of this connection structure.

[0036] Preferably, as Figure 3 , Figure 4 and Figure 7 shown, the axis of the threaded hole 112 is perpendicular to the axis of the shaft hole 111. The plane where the communication port 113 is located is parallel to both the axis of the shaft hole 111 and the axis of the threaded hole 112. Correspondingly, the positioning plane 211 is parallel to the axis of the motor shaft 210. Then, the orientation of the threaded hole 112 relative to the shaft hole 111 and the orientation of the positioning plane 211 relative to the motor shaft 210 are easier to determine, and the orientation accuracy is easier to guarantee, thereby improving the machining convenience and machining accuracy of the threaded hole 112 and the positioning plane 211, correspondingly ensuring the mating connection between the motor shaft 210 and the connecting screw 300, reducing the processing cost of this connection structure, and improving the assembly convenience and assembly firmness of this connection structure.

[0037] Optionally, in this embodiment, the extension length of the communication port 113 along the axial direction of the threaded hole 112 is not less than half of the aperture diameter of the shaft hole 111. The length of the straight line segment where the positioning plane 211 is tangent to the connecting thread is equal to the extension length of the communication port 113 along the circumferential direction of the threaded hole 112. Then the length of the straight line segment is greater than or equal to half of the diameter length of the shaft hole 111 and less than the diameter length of the shaft hole 111, thereby ensuring that the length of the straight line segment is relatively large, correspondingly ensuring the tangential limiting action length between the positioning plane 211 and the connecting thread, and improving the limiting locking stability and firmness of the connecting screw 300 to the positioning plane 211.

[0038] In this embodiment, the aperture diameter of the threaded hole 112 is 0.3 - 0.8 times that of the shaft hole 111. The aperture diameter of the connecting screw 300 is approximately equal to that of the threaded hole 112. The aperture diameter of the threaded hole 112 is greater than or equal to 0.3 times that of the shaft hole 111 and less than or equal to 0.8 times that of the shaft hole 111, thereby ensuring the acting area between the positioning plane 211 and the connecting screw 300, ensuring the locking stability of the connecting screw 300 to the positioning plane 211 and the motor shaft 210 and the fan blade bushing 110, and reducing the damage to the strength of the fan blade bushing 110 caused by the opening of the threaded hole 112.

[0039] Specifically, in this embodiment, as Figure 7 and Figure 8 shown, the outer peripheral surface of the connecting screw 300 includes a guiding taper section 310, and the constricted end of the guiding taper section 310 is consistent with the end face of the screwing end of the connecting screw 300. A section of the connecting screw 300 near the end face of the screwing end is frustum-shaped, and the outer peripheral surface of this section serves as the guiding taper section 310, and the constricted end of the guiding taper section 310 is collinear with the outer edge line of the end face of the screwing end; during assembly, it is more convenient for the screwing end of the connecting screw 300 in a constricted shape to be inserted into the threaded hole 112. When the end of the positioning plane 211 facing away from the orifice of the threaded hole 112 is inclined towards the communication port 113, when the connecting screw 300 is screwed into the threaded hole 112 and abuts against the positioning plane 211, the guiding taper section 310 can act with the positioning plane 211 to improve the correction effect of the connecting screw 300 to push the motor shaft 210 to deflect and return to the correct position, and at the same time can also reduce the occurrence of the situation where the connecting screw 300 is stuck with the positioning plane 211.

[0040] Specifically, as Figure 4 shown, the axis of the threaded hole 112 extends in the vertical direction and its orifice is located at the top. The bottom end of the connecting screw 300 serves as the screwing end and is screwed into the threaded hole 112 from top to bottom. The angle between the guiding taper section 310 and the horizontal plane is α, and the bottom end of the positioning plane 211 is inclined and extends into the threaded hole 112 towards the communication port 113. The angle between the positioning plane 211 and the horizontal plane is β. When α > β ≥ 90°, the connecting screw 300 can achieve a better return-to-position effect on the positioning plane 211 during the process of being screwed into the threaded hole 112.

[0041] In this embodiment, as Figure 6 shown, the positioning plane 211 extends axially along the motor shaft 210 to the end face of the insertion end of the motor shaft 210. On the one hand, the axial extension length of the positioning plane 211 along the motor shaft 210 is relatively long. When the motor shaft 210 is inserted into the shaft hole 111, on the basis of ensuring that the positioning plane 211 covers the area where the communication port 113 is located and ensuring the limit locking between the positioning plane 211 and the connecting screw 300, the restriction on the axial assembly position of the motor shaft 210 is small, thereby improving the assembly convenience of the motor shaft 210 and the shaft hole 111; on the other hand, a certain depth can be cut axially from the end face of the insertion end of the motor shaft 210 to obtain the positioning plane 211, and the processing convenience is higher.

[0042] Preferably, in this embodiment, a lock adhesive is filled between the threaded hole 112 and the connecting screw 300. During assembly, the flowing lock adhesive can be filled between the external threads of the connecting screw 300 or the internal threads of the threaded hole 112. During the process of screwing the connecting screw 300 into the threaded hole 112, the lock adhesive fills the gap between the external thread and the internal thread, and becomes solidified after a certain period of time, thereby improving the firmness of the connecting screw 300 screwed into the threaded hole 112, reducing the occurrence of loosening of the connecting screw 300 during subsequent use, correspondingly further improving the firmness and stability of the motor shaft 210 assembled on the impeller shaft sleeve 110, and further improving the stability and quiet effect of the operation of this connection structure, and reducing the after-sales maintenance rate.

[0043] This embodiment also provides an air conditioner, including a housing, a cross-flow impeller 100, a motor 200 and a connecting screw 300. The cross-flow impeller 100 is rotatably connected in the housing, the motor 200 is arranged in the housing, and the motor shaft 210 of the motor 200, the impeller shaft sleeve 110 of the cross-flow impeller 100 and the connecting screw 300 adopt the above connection structure. In this air conditioner, the motor shaft 210 of the motor 200 and the impeller shaft sleeve 110 of the cross-flow impeller 100 adopt the above connection structure, which can not only ensure the circumferential stable locking between the motor shaft 210 and the impeller shaft sleeve 110, reduce the occurrence of deflection of the motor shaft 210 relative to the impeller shaft sleeve 110 during subsequent use, correspondingly ensure the quiet effect of the operation at the connection between the motor shaft 210 and the impeller shaft sleeve 110, and reduce the after-sales maintenance rate; moreover, during the assembly process, the connecting screw 300 can also play a certain role in correcting the circumferential angle of the motor shaft 210, correspondingly reducing the accuracy requirement for the orientation of the motor shaft 210 inserted into the shaft hole 111 on the basis of realizing the tangential fit and limit between the connecting screw 300 and the positioning plane 211, and further improving the assembly convenience of the motor shaft 210 and the impeller shaft sleeve 110.

[0044] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection structure between a motor shaft and a fan blade sleeve, characterized in that: The invention comprises a connecting screw (300), a fan blade shaft sleeve (110) having an axial hole (111), and a motor shaft (210) having a positioning plane (211) on the shaft side wall, wherein the outer wall of the fan blade shaft sleeve (110) is provided with a threaded hole (112) intersecting the axial hole (111), and the threaded hole (112) deviates from the axis of the axial hole (111) and passes through the peripheral area of ​​the axial hole (111) to form a connecting opening (113); the motor shaft (210) is plugged into the axial hole (111), and the positioning plane (211) corresponds to the connecting opening (113); the connecting screw (300) is screwed into the threaded hole (112) and the screwing range covers the area where the connecting opening (113) is located, and the outer peripheral wall of the connecting screw (300) is tangent to the positioning plane (211).

2. The connection structure between the motor shaft and the fan blade sleeve according to claim 1 is characterized in that: The connecting screw (300) is interference fit with the positioning plane (211).

3. The connection structure between the motor shaft and the fan blade sleeve according to claim 1, characterized in that: The threaded hole (112) completely passes through the fan blade shaft sleeve (110).

4. The connection structure between the motor shaft and the fan blade sleeve according to claim 1, characterized in that: The axis of the threaded hole (112) is perpendicular to the axis of the shaft hole (111).

5. The connection structure between the motor shaft and the fan blade sleeve according to claim 1, characterized in that: The extending length of the communication port (113) along the axial direction of the threaded hole (112) is not less than half the diameter of the axial hole (111).

6. The connection structure between the motor shaft and the fan blade sleeve according to claim 1, characterized in that: The diameter of the threaded hole (112) is 0.3-0.8 times the diameter of the shaft hole (111).

7. The connection structure between the motor shaft and the fan blade sleeve according to any one of claims 1 to 6, characterized in that: The outer peripheral surface of the connecting screw (300) comprises a guide cone section (310), and the constricted end of the guide cone section (310) is consistent with the end surface of the screw-on end of the connecting screw (300).

8. The connection structure between the motor shaft and the fan blade sleeve according to any one of claims 1 to 6, characterized in that: The positioning plane (211) extends along the axial direction of the motor shaft (210) to the plug-in end face of the motor shaft (210).

9. The connection structure between the motor shaft and the fan blade sleeve according to any one of claims 1 to 6, characterized in that: Anti-loosening glue is filled between the threaded hole (112) and the connecting screw (300).

10. An air conditioner, characterized in that: The invention comprises a shell, a crossflow blade (100), a motor (200) and a connecting screw (300), wherein the crossflow blade (100) is rotatably connected in the shell, the motor (200) is arranged in the shell, and the motor shaft (210) of the motor (200), the blade shaft sleeve (110) of the crossflow blade (100) and the connecting screw (300) adopt the connection structure according to any one of claims 1 to 9.

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