Coupling, rotating shaft system and air conditioner

Abstract

The embodiment of the utility model provides a coupler, a rotating shaft system and an air conditioner. The coupler comprises a main body part and two shaft sleeves. The main body part has an accommodating cavity. The containing cavity penetrates through the two axial ends of the main body part. The cavity wall of the accommodating cavity extends towards the central axis of the main body part to form a positioning part; transmission grooves are formed in the two sides, in the axial direction of the main body part, of the positioning part. The two shaft sleeves are arranged in the containing cavity. The shaft sleeve comprises a body section and a transmission section. One end of the transmission section is connected with the body section, and the other end extends along the axial direction of the main body part towards the direction far away from the body section. The transmission sections of the two shaft sleeves are arranged in the transmission grooves in the two sides of the positioning part respectively. According to the coupling provided by the embodiment of the invention, the transmission section is matched with the transmission groove, and the transmission groove at least can limit the transmission section in the circumferential direction, so that certain torque can be transmitted between the two shaft sleeves through the transmission section and the positioning part, the condition that the coupling depends on the main body part to transmit the torque is improved, and the risk of transmission failure of the coupling is reduced.

Description

Technical Field

[0001] The present application relates to the field of air conditioning, and in particular to a coupling, a rotating shaft system and an air conditioner. Background Art

[0002] The fan assembly of the air conditioner usually has multiple rotating shafts, and the rotating shafts are connected by couplings to achieve the transmission of motion and torque.

[0003] In the related art, when the shaft connected to the coupling rotates at high speed and is subjected to a large load, the strength and torsional resistance of the coupling are insufficient and the coupling is prone to failure. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a coupling, a rotating shaft system and an air conditioner to improve the transmission method of motion and torque between the coupling and the rotating shaft.

[0005] To achieve the above-mentioned object, a first aspect of an embodiment of the present application provides a coupling, comprising:

[0006] A main body, wherein the main body has a receiving cavity, the receiving cavity runs through both ends of the main body along the axial direction, the cavity wall of the receiving cavity extends toward the central axis of the main body to form a positioning portion, and the positioning portion is formed with transmission grooves on both sides of the axial direction of the main body;

[0007] Two shaft sleeves, the two shaft sleeves are arranged in the accommodating cavity, the shaft sleeves include a main body section and a transmission section, one end of the transmission section is connected to the main body section, and the other end extends along the axial direction of the main body toward a direction away from the main body section; the transmission sections of the two shaft sleeves are respectively arranged in the transmission grooves on both sides of the positioning part.

[0008] In some embodiments, the positioning portion is recessed along both sides of the main body portion in an axial direction to form the transmission groove.

[0009] In some embodiments, the central angle between two adjacent transmission segments of the same sleeve is 30° to 180°.

[0010] In some embodiments, the number of the transmission segments on the same sleeve ranges from 2 to 12.

[0011] In some embodiments, in a cross section perpendicular to the axial direction of the sleeve, the cross section of the transmission section is circular, elliptical, polygonal or sector-shaped.

[0012] In some embodiments, a partial area of ​​the positioning portion is recessed to form a positioning groove, and the rotating shaft sleeved in the shaft sleeve can extend into the positioning groove, and the positioning groove is used to limit the rotating shaft.

[0013] In some embodiments, the coupling includes a locking piece, the main body is provided with at least two first locking holes, the two sleeves are provided with second locking holes, and the locking piece passes through the first locking hole and the second locking hole in sequence and is locked on the rotating shaft in the sleeve.

[0014] A second aspect of an embodiment of the present application provides a rotating shaft system, comprising at least two rotating shafts and a coupling as described in any one of the above items, wherein the two bushings are respectively sleeved on the two rotating shafts.

[0015] In some embodiments, one of the bushing and the rotating shaft is provided with a first limiting protrusion extending along the axial direction of the main body, and the other is provided with a first limiting groove extending along the axial direction of the main body, and the first limiting protrusion cooperates with the first limiting groove, so that the bushing can at least limit the rotating shaft in the circumferential direction.

[0016] A third aspect of an embodiment of the present application provides an air conditioner, comprising a shaft system as described in any one of the above items.

[0017] The coupling provided by the embodiment of the present application is provided with transmission grooves on both sides of the axial direction of the main body through the positioning part, and the transmission sections of the two sleeves are respectively arranged in the transmission grooves on both sides of the positioning part, so that the transmission sections extend into the transmission grooves and cooperate with the transmission grooves, and the transmission grooves can at least limit the transmission sections in the circumferential direction, so that a certain torque can be transmitted between the two sleeves through the transmission sections and the positioning parts, thereby improving the situation that the coupling relies on the main body to transmit torque, improving the movement and torque transmission mode between the coupling and the rotating shaft, and reducing the risk of coupling transmission failure when the load transmitted by the coupling is large, or the speed is high, or the main body is fatigued and aged. At the same time, through the cooperation between the transmission section and the transmission groove, the contact area between the sleeve and the main body is increased, and the integrity and strength of the coupling are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded schematic diagram of a coupling provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a coupling provided in an embodiment of the present application;

[0020] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0021] Figure 4 A coupling provided in another embodiment of the present application is Figure 2 A cross-sectional view at AA;

[0022] Figure 5 A cross-sectional view of the coupling in an exploded state provided by an embodiment of the present application;

[0023] Figure 6 A schematic structural diagram of a rotating shaft system provided in an embodiment of the present application.

[0024] Description of Reference Numerals

[0025] 10. Rotating shaft system; 11. Coupling; 111. Main body; 111a. Accommodating chamber; 111b. Transmission groove; 111c. Positioning portion; 111d. First locking hole; 111e. Positioning groove; 112. Bushing; 112a. First limiting protrusion; 112b. Main body section; 112c. Second locking hole; 112d. Transmission section; 113. Locking member; 12. Rotating shaft; 12a. First limiting groove. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the implementation of the present application in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "axial" and "radial" refer to the axial direction and radial direction of the main body, respectively. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0028] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0030] The fan assembly of the air conditioner usually has multiple rotating shafts, and the rotating shafts are connected by couplings to achieve the transmission of motion and torque.

[0031] In the related art, the connection and transmission method between the connecting shaft of the fan assembly and the motor shaft is through a coupling, which is fixed to the connecting shaft and the motor shaft respectively by screws, and the motion and torque are transmitted by the friction between the screws and the rotating shaft. When the rotating shaft connected to the coupling rotates at a high speed or is subjected to a large load, the coupling has poor performance, insufficient strength and torsion resistance, and the coupling is prone to transmission failure.

[0032] Based on the above situation, the first aspect of the embodiment of the present application provides a coupling 11, please refer to Figures 1 to 5 . The coupling 11 includes a main body 111 and two sleeves 112. The main body 111 has a accommodating cavity 111a. The accommodating cavity 111a runs through both ends of the main body 111 along the axial direction. The cavity wall of the accommodating cavity 111a extends toward the central axis of the main body 111 to form a positioning portion 111c. The positioning portion 111c is formed with transmission grooves 111b on both sides of the axial direction of the main body 111. Two sleeves 112 are arranged in the accommodating cavity 111a. The sleeve 112 includes a body section 112b and a transmission section 112d. One end of the transmission section 112d is connected to the body section 112b, and the other end extends in the axial direction of the main body 111 in a direction away from the body section 112b. The transmission sections 112d of the two sleeves 112 are respectively arranged in the transmission grooves 111b on both sides of the positioning portion 111c.

[0033] It should be noted that the coupling 11 is a widely used transmission component, which is mainly used to connect two rotating shafts 12 in different mechanisms together so that they rotate together and transmit torque.

[0034] The main body 111 has a receiving cavity 111 a , and the receiving cavity 111 a can be used to receive the shaft sleeve 112 .

[0035] The accommodating cavity 111 a passes through both ends of the main body 111 along the axial direction, that is, the main body 111 can be a sleeve-like part.

[0036] Exemplarily, the main body 111 is a flexible connecting sleeve, which has a certain flexibility and can produce a certain elastic deformation, thereby improving the impact resistance of the main body 111 and improving the situation where the main body 111 is easily damaged under impact.

[0037] Exemplarily, the main body 111 is a rubber member, thereby reducing the number of processing steps and lowering the production cost.

[0038] Specifically, the two sleeves 112 are respectively sleeved on one end of the two rotating shafts 12, and then the rotating shaft 12 with the sleeves 112 is respectively extended into the accommodating cavity 111a from both ends of the main body 111, and the rotating shaft 12, the sleeves 112 and the main body 111 are connected together, thereby realizing the connection between the coupling 11 and the two rotating shafts 12.

[0039] Exemplarily, the sleeve 112 is made of aluminum alloy.

[0040] Specifically, an interference fit or a clearance fit may be formed between the inner wall of the accommodating cavity 111 a of the main body 111 and the outer circle of the shaft sleeve 112 .

[0041] The cavity wall of the accommodating cavity 111 a extends toward the central axis of the main body 111 to form a positioning portion 111 c , that is, the positioning portion 111 c extends inwardly from the cavity wall.

[0042] The positioning portion 111 c may be substantially perpendicular or completely perpendicular to the central axis of the main body 111 .

[0043] Specifically, when the coupling 11 is connected to the two rotating shafts 12, the two sleeves 112 extend from the two ends of the main body 111 and are disposed in the accommodating cavity 111a, and at least part of the end faces of the two sleeves 112 can be respectively stopped on the opposite side walls of the positioning portion 111c. In this way, the two sleeves 112 can be axially positioned, thereby reducing the probability of the two sleeves 112 contacting each other and causing damage, and improving the assembly efficiency of the coupling 11.

[0044] It should be noted that the positioning portion 111c can separate the accommodating cavity 111a into two chambers, and the two chambers can be disconnected or connected to each other.

[0045] Exemplarily, the main body 111 and the positioning portion 111c are respectively rubber parts, thereby reducing the number of processing steps and lowering the production cost.

[0046] The main body 111 and the positioning portion 111c may be an integrally formed part. In other words, the positioning portion 111c may be integrally formed on the inner wall of the accommodating cavity 111a of the main body 111, so that the strength of the main body 111 can be strengthened by the positioning portion 111c, and the torsion resistance of the main body 111 can be increased.

[0047] For example, the main body 111 and the positioning portion 111 c may be integrally formed by injection molding.

[0048] Transmission grooves 111 b are formed on both sides of the positioning portion 111 c along the axial direction of the main body portion 111 , which are used to contact the transmission sections 112 d of the two shaft sleeves 112 respectively, so as to achieve transmission cooperation.

[0049] One end of the transmission section 112d of the sleeve 112 is connected to the main body section 112b, and the other end extends along the axial direction of the main body 111 in a direction away from the main body section 112b, thereby extending into the transmission groove 111b and cooperating with the transmission groove 111b. The transmission groove 111b can at least limit the transmission section 112d in the circumferential direction, so that a certain torque can be transmitted between the two sleeves 112 through the transmission section 112d and the positioning portion 111c, thereby improving the transmission cooperation between the sleeve 112 and the main body 111 of the coupling 11 and increasing the torque that the coupling 11 can transmit.

[0050] There may be a clearance fit or an interference fit between the transmission section 112d and the transmission groove 111b.

[0051] In addition, the transmission groove 111b can also limit the transmission section 112d in the axial direction and the circumferential direction at the same time.

[0052] Exemplarily, the body section 112b and the transmission section 112d are integrally formed.

[0053] In the related art, both sleeves only have a body section, and the two sleeves are respectively sleeved on the two rotating shafts. The coupling is respectively locked on the two rotating shafts by means of locking screws passing through the screw holes on the main body and the body section of the sleeve, and the motion and torque are transmitted by the friction between the locking screws and the rotating shaft. During the transmission process, there is no transmission structure between the two sleeves, and the motion and torque are completely transmitted from one end of the main body to the other end along the axial direction, wherein the middle section of the main body along the axial direction bears the main torque. When the rotating shaft connected to the coupling rotates at a high speed or is subjected to a large load, the coupling is prone to transmission failure.

[0054] Exemplarily, the transmission segments 112d of the two sleeves 112 are evenly distributed at one end of the main body segment 112b, and the number of the transmission segments 112d on the two sleeves 112 is the same. The transmission segments 112d of the two sleeves 112 are oppositely arranged in the accommodating cavity 111a of the main body 111, and are staggered at a certain angle, so that the transmission segment 112d of one sleeve 112 extends between two adjacent transmission segments 112d on the other sleeve 112. The transmission grooves 111b on both sides of the positioning portion 111c are arranged corresponding to the transmission segments 112d, so that on the cross section perpendicular to the axial direction of the sleeve 112, the cross section at the position of the transmission segments 112d can present a structure in which the transmission segments 112d of the two sleeves 112 are staggered, and the positioning portion 111c is arranged between any two transmission segments 112d. Among them, during the transmission process, the transmission section 112d of one sleeve 112 abuts against the transmission section 112d of the other sleeve 112 through the positioning portion 111c, so that the transmission section 112d of one sleeve 112 can indirectly transmit the torque to the transmission section 112d of the other sleeve 112 through the positioning portion 111c, thereby realizing the torque transmission between the two sleeves 112, improving the situation where the coupling 11 relies on the main body 111 to transmit torque, reducing the risk of transmission failure of the coupling 11 when the main body 111 is fatigued and aged, improving the transmission performance of the coupling 11, and improving the torsional strength of the coupling 11.

[0055] Among them, during the transmission process, the torque transmitted by the coupling 11 can be that part of the torque is transmitted from the transmission section 112d of one sleeve 112 to the transmission section 112d of another sleeve 112 through the positioning portion 111c, and part of the torque is transmitted by the main body 111 and the locking member 113; or all the torque is transmitted from the transmission section 112d of one sleeve 112 to the transmission section 112d of another sleeve 112 through the positioning portion 111c.

[0056] The coupling 11 provided in the embodiment of the present application has transmission grooves 111b formed on both sides of the axial direction of the main body 111 through the positioning portion 111c, and the transmission sections 112d of the two sleeves 112 are respectively arranged in the transmission grooves 111b on both sides of the positioning portion 111c, so that the transmission section 112d extends into the transmission groove 111b and cooperates with the transmission groove 111b, and the transmission groove 111b can at least limit the transmission section 112d in the circumferential direction, so that a certain torque can be transmitted between the two sleeves 112 through the transmission section 112d and the positioning portion 111c, thereby improving the situation that the coupling 11 relies on the main body 111 to transmit torque, and reducing the risk of transmission failure of the coupling 11 when the load transmitted by the coupling 11 is large, or the speed is high, or the main body 111 is fatigued and aged. At the same time, through the cooperation between the transmission section 112d and the transmission groove 111b, the contact area between the sleeve 112 and the main body 111 is increased, and the integrity and strength of the coupling 11 are improved.

[0057] For some examples, see Figures 1 to 5 The positioning portion 111c is recessed along both sides of the axial direction of the main body portion 111 to form a transmission groove 111b.

[0058] The positioning portion 111c is recessed on both sides along the axial direction of the main body 111, that is, the transmission groove 111b is a groove with one side open. The opening of the transmission groove 111b faces one end of the main body 111 along the axial direction.

[0059] Exemplarily, the transmission groove 111b is formed by the recessed groove wall of the positioning portion 111c.

[0060] Exemplarily, the transmission groove 111b is formed by the recessed groove wall of the positioning portion 111c and the cavity wall of the accommodating cavity 111a.

[0061] Therefore, the positioning portion 111c is recessed on both sides of the axial direction of the main body 111 to form a transmission groove 111b, so that the transmission groove 111b is a groove with an open side, and the transmission groove 111b is closed on one side radially toward the center axis. On the one hand, the transmission segment 112d is limited in the radial and circumferential directions to prevent the transmission segment 112d from escaping radially toward the center axis and wearing the transmission groove 111b. On the other hand, the connection structure between the transmission grooves 111b is increased, thereby enhancing the overall structural strength of the positioning portion 111c, improving the torsional resistance of the coupling 11, and improving the reliability of the transmission between the rotating shaft 12 and the sleeve 112.

[0062] For some examples, see Figures 1 to 3 , the center angles of two adjacent transmission sections 112d of the same sleeve 112 are 30° to 180°. For example, the center angles are 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170° or 180°, etc.

[0063] It should be noted that the central angle corresponding to two adjacent transmission segments 112d of the same sleeve 112 refers to the angle between the positions of the two adjacent transmission segments 112d and the central axis of the sleeve 112, i.e., the center of the circle on the cross section, on a cross section perpendicular to the axial direction of the sleeve 112.

[0064] It is understandable that the larger the central angle, the larger the gap between two adjacent transmission segments 112d, which is more conducive to setting the transmission segment 112d of another sleeve 112 in the gap, thereby achieving a certain torque transmission between the two sleeves 112 through the transmission segment 112d and the positioning portion 111c.

[0065] Correspondingly, the larger the central angle, the larger the gap between two adjacent transmission segments 112d, and the larger the size of the transmission segment 112d, thereby increasing the structural strength of the transmission segment 112d and thus increasing the overall structural strength of the sleeve 112.

[0066] It should be noted that the central angles corresponding to two adjacent transmission segments 112d of the same sleeve 112 may be the same or different, that is, the transmission segments 112d of the same sleeve 112 may be evenly distributed or unevenly distributed.

[0067] For example, a sleeve 112 has three transmission segments 112d, and the central angles between the three transmission segments 112d may be 60°, 120°, and 180°.

[0068] For another example, a shaft sleeve 112 has three transmission segments 112d, and the central angles between the three transmission segments 112d may be 120°, 120°, and 120°.

[0069] Here, by setting the central angle corresponding to two adjacent transmission segments 112d of the same sleeve 112 to 30° to 180°, the gap between the two adjacent transmission segments 112d is made more reasonable, the size of the transmission segment 112d can be larger, the structural strength of the transmission segment 112d is increased, and the overall structural strength of the sleeve 112 can be increased.

[0070] In some embodiments, the number of transmission segments 112d on the same sleeve 112 ranges from 2 to 12. For example, the number of transmission segments 112d on the same sleeve 112 can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.

[0071] It is understandable that, without affecting the connection strength between the transmission segment 112d and the body segment 112b, the more transmission segments 112d there are on the same sleeve 112, the greater the torque that can be transmitted between the two sleeves 112 through the transmission segments 112d and the positioning portion 111c.

[0072] For some examples, see Figure 1 and Figure 5 In the cross section perpendicular to the axial direction of the sleeve 112, the cross section of the transmission section 112d is circular, elliptical, polygonal or sector-shaped.

[0073] It should be noted that the cross-sections of all transmission segments 112d on the same sleeve 112 may be circular, elliptical, polygonal or sector-shaped at the same time, or the cross-sections of the transmission segments 112d on the same sleeve 112 may be two, three or four of the circular, elliptical, polygonal or sector-shaped.

[0074] Among them, a figure formed by an arc and two radii passing through the two ends of the arc is called a sector. The radius of the circle where the arc is located can be different from or the same as the radius of the sector.

[0075] Exemplarily, the cross section of the transmission section 112 d is fan-shaped, and the radius of the fan is equal to the wall thickness of the sleeve 112 .

[0076] Exemplarily, the cross section of the transmission segment 112d is fan-shaped. On the section perpendicular to the axial direction of the sleeve 112, the radius of the circle where the arc of the fan is located is equal to the radius of the circle where the outer circle of the main body segment 112b is located, which is more conducive to the processing and forming of the transmission segment 112d.

[0077] Exemplarily, the cross section of the transmission segment 112d is fan-shaped, and the angle between two radii of the fan is 90°, so that the angle between the plane where the contact surface of the transmission segment 112d and the positioning portion 111c is located and the circumferential direction is 45°.

[0078] Exemplarily, the cross-section of the transmission segment 112d is fan-shaped, which, on the one hand, is conducive to the processing and forming of the transmission segment 112d, and on the other hand, enables a portion of the force applied by the transmission segment 112d on the transmission groove 111b in the circumferential direction during the transmission process to be dispersed in the radial direction, thereby increasing the reliability and strength of the transmission between the sleeve 112 and the main body 111.

[0079] Therefore, by setting the cross-section of the transmission section 112d to be circular, elliptical, polygonal or fan-shaped in a section perpendicular to the axial direction of the sleeve 112, transmission between the sleeve 112 and the main body 111 is achieved, thereby improving the reliability of the transmission section 112d and the strength of the sleeve 112.

[0080] For some examples, see Figure 4 Part of the positioning portion 111c is recessed to form a positioning groove 111e. The rotating shaft 12 sleeved in the shaft sleeve 112 can extend into the positioning groove 111e. The positioning groove 111e is used to limit the rotating shaft 12.

[0081] The rotating shaft 12 sleeved in the shaft sleeve 112 can extend into the positioning groove 111e, that is, the rotating shaft 12 can pass from one end of the shaft sleeve 112 to the other end and contact the positioning groove 111e, so that the positioning groove 111e can limit the axial position of the rotating shaft 12, making assembly more convenient, and at the same time avoiding direct contact between the two rotating shafts 12, thereby preventing the shaking and abnormal sound of the rotating shaft 12. At the same time, it can also improve the situation where the two rotating shafts 12 are in direct contact due to easy omission of the rubber plug, thereby improving the quality of assembly.

[0082] It should be noted that the positioning groove 111e may be formed only on one side of the positioning portion 111c along the axial direction, or may be formed on both sides.

[0083] Exemplarily, a partial area of ​​the positioning portion 111 c is recessed along the axial direction of the main body 111 to form a positioning groove 111 e .

[0084] Exemplarily, a partial area of ​​the positioning groove 111e is provided with a through hole along the axial direction of the main body 111, and the through hole penetrates both sides of the positioning portion 111c along the axial direction, thereby dividing the accommodating cavity 111a into two mutually conductive chambers.

[0085] Here, a positioning groove 111e is formed by recessing a partial area of ​​the positioning portion 111c, and the positioning groove 111e is used to limit the rotating shaft 12, thereby achieving axial limitation of the rotating shaft 12 by the positioning groove 111e, making assembly more convenient and improving assembly efficiency. At the same time, it can also avoid direct contact between the two rotating shafts 12, preventing the rotating shaft 12 from shaking and generating abnormal noise.

[0086] For some examples, see Figures 1 to 6 The coupling 11 includes a locking member 113. The main body 111 is provided with at least two first locking holes 111d. The two sleeves 112 are provided with second locking holes 112c. The locking member 113 passes through the first locking hole 111d and the second locking hole 112c in sequence and is locked on the rotating shaft 12.

[0087] Exemplarily, the locking member 113 is a locking screw or a locking bolt, etc., which is not limited here.

[0088] It should be noted that a plane can be set on the cylindrical surface of the rotating shaft 12, and the locking piece 113 passes through the first locking hole 111d and the second locking hole 112c in sequence and is locked on the plane of the rotating shaft 12, thereby increasing the contact area between the locking piece 113 and the rotating shaft 12, increasing the friction force, and improving the connection strength between the locking piece 113 and the rotating shaft 12.

[0089] Thus, the locking piece 113 passes through the first locking hole 111d and the second locking hole 112c in sequence and is locked on the rotating shaft 12, so that the main body 111, the two sleeves 112 and the rotating shaft 12 are fixed, the connection strength between the locking piece 113 and the rotating shaft 12 is increased, and the reliability of the locking piece 113 fixing the rotating shaft 12 is improved.

[0090] The second aspect of the present application provides a rotating shaft system 10. Figures 1 to 6 The rotating shaft system 10 includes at least two rotating shafts 12 and a coupling 11 provided in any embodiment of the present application, and two shaft sleeves 112 are respectively sleeved on the two rotating shafts 12 .

[0091] It should be noted that the two rotating shafts 12 connected by the coupling 11 can be a driving shaft and a driven shaft respectively.

[0092] Exemplarily, the two rotating shafts 12 connected by the coupling 11 are respectively the output rotating shaft 12 of the motor and the dragged connecting shaft, or are respectively two connecting shafts, or are respectively two motor rotating shafts 12 .

[0093] Among them, the function of the connecting shaft can be a transition connection, transmitting motion and torque from the motor shaft to other components.

[0094] Exemplarily, the rotating shaft 12 may be a hollow shaft or a solid shaft, which is not limited here.

[0095] Illustratively, the shaft system 10 provided in the embodiment of the present application can be applied to a fan, a fan assembly or an air conditioner.

[0096] Illustratively, the coupling 11 provided in the embodiment of the present application can be applied to a fan, a fan assembly or an air conditioner.

[0097] The rotating shaft system 10 provided in the embodiment of the present application is provided with transmission grooves 111b on both sides of the axial direction of the main body 111 through the positioning portion 111c of the coupling 11, and the transmission sections 112d of the two sleeves 112 are respectively arranged in the transmission grooves 111b on both sides of the positioning portion 111c, so that the transmission section 112d extends into the transmission groove 111b and cooperates with the transmission groove 111b, and the transmission groove 111b can at least limit the transmission section 112d in the circumferential direction, so that a certain torque can be transmitted between the two sleeves 112 through the transmission section 112d and the positioning portion 111c, thereby improving the situation in which the coupling 11 relies on the main body 111 to transmit torque, improving the movement and torque transmission mode between the coupling 11 and the rotating shaft 12, and reducing the risk of transmission failure of the coupling 11 when the load transmitted by the coupling 11 is large, or the speed is high, or the main body 111 is fatigued and aged, thereby improving the stability and reliability of the rotating shaft system 10.

[0098] For some examples, see Figure 6 One of the sleeve and the rotating shaft is provided with a first limiting protrusion extending along the axial direction of the main body, and the other is provided with a first limiting groove extending along the axial direction of the main body. The first limiting protrusion cooperates with the first limiting groove, and the sleeve can at least limit the rotating shaft in the circumferential direction.

[0099] For some examples, see Figure 6 One of the sleeve 112 and the rotating shaft 12 is provided with a first limiting protrusion 112a extending along the axial direction of the main body 111, and the other is provided with a first limiting groove 12a extending along the axial direction of the main body 111. The first limiting protrusion 112a cooperates with the first limiting groove 12a, and the sleeve 112 can at least limit the rotating shaft 12 in the circumferential direction.

[0100] It should be noted that the sleeve 112 may be provided with a first limiting protrusion 112a extending along the axial direction of the main body 111, and the rotating shaft 12 may be provided with a first limiting groove 12a extending along the axial direction of the main body 111; or the rotating shaft 12 may be provided with a first limiting protrusion 112a extending along the axial direction of the main body 111, and the sleeve 112 may be provided with a first limiting groove 12a extending along the axial direction of the main body 111.

[0101] Exemplarily, the first limiting protrusion 112a is a key, and the first limiting groove 12a is a keyway.

[0102] Exemplarily, the number of the first limiting protrusions 112a may be one, two, three, four, five or six, etc., which is not limited here.

[0103] Exemplarily, the number of the first limiting grooves 12a may be one, two, three, four, five or six, etc., which is not limited here.

[0104] The number of the first limiting protrusions 112a and the number of the first limiting grooves 12a may be the same, and the first limiting protrusions 112a and the first limiting grooves 12a correspond one to one.

[0105] The first limiting protrusion 112a cooperates with the first limiting groove 12a, so that the circumferential side wall of the first limiting protrusion 112a can contact the circumferential side wall of the first limiting groove 12a, so that the sleeve 112 can at least limit the rotating shaft 12 in the circumferential direction, and transmit the movement and torque of the driven rotating shaft 12 to the driven rotating shaft 12 through circumferential limitation. That is to say, the first limiting protrusion 112a cooperates with the first limiting groove 12a to realize the force transmission between the sleeve 112 and the rotating shaft 12, which is beneficial to improve the reliability of the connection structure between the sleeve 112 and the rotating shaft 12, thereby improving the movement and torque transmission mode between the coupling 11 and the rotating shaft 12, and reducing the risk of transmission failure. At the same time, positioning can also be performed through the first limiting protrusion 112a and the first limiting groove 12a, which is beneficial to improving assembly efficiency.

[0106] The first limiting protrusion 112a may be integrally formed with the shaft sleeve 112 or the rotating shaft 12 on which it is disposed, or may be a split design.

[0107] In addition, the first limiting protrusion 112 a cooperates with the first limiting groove 12 a , so that the shaft sleeve 112 can also limit the rotation shaft 12 in the axial direction.

[0108] Exemplarily, the rotating shaft system 10 includes a connecting shaft, a coupling 11 and a motor shaft. Both the motor shaft and the connecting shaft have keyways. The bushing 112 is an aluminum part, and the main body 111 is a rubber part. The two bushings 112 are located at both ends of the coupling 11 and have key features that cooperate with the keyways. The connecting shaft and the motor shaft are respectively inserted into the bushings 112 on the left and right sides of the coupling 11. The key features on the coupling 11 are respectively assembled with the keyway features on the connecting shaft and the motor shaft. The motion and torque are transmitted by the cooperation of the key and the keyway, which reduces the number of parts, improves the transmission mode of the motion and torque between the coupling 11 and the rotating shaft 12, and reduces the risk of transmission failure. At the same time, positioning can also be performed by the key and the keyway, which is conducive to improving assembly efficiency.

[0109] A third aspect of the embodiments of the present application provides an air conditioner, which includes the shaft system 10 provided in any embodiment of the present application.

[0110] Exemplarily, the air conditioner includes a fan or a fan assembly.

[0111] Exemplarily, the coupling 11 is used for a fan blade assembly of an air-conditioning duct unit.

[0112] The air conditioner provided in the embodiment of the present application is provided with transmission grooves 111b on both sides of the axial direction of the main body 111 through the positioning portion 111c of the coupling 11, and the transmission sections 112d of the two sleeves 112 are respectively arranged in the transmission grooves 111b on both sides of the positioning portion 111c, so that the transmission section 112d extends into the transmission groove 111b and cooperates with the transmission groove 111b, and the transmission groove 111b can at least limit the transmission section 112d in the circumferential direction, so that a certain torque can be transmitted between the two sleeves 112 through the transmission section 112d and the positioning portion 111c, thereby improving the situation in which the coupling 11 relies on the main body 111 to transmit torque, and reducing the risk of transmission failure of the shaft system 10 when the load transmitted by the coupling 11 is large, the speed is high, or the main body 111 is fatigued and aged, thereby improving the safety and reliability of the air conditioner and reducing the maintenance frequency of the air conditioner.

[0113] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0114] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coupling, applied to an air conditioner, characterized in that: include: A main body, wherein the main body has a receiving cavity, the receiving cavity runs through both ends of the main body along the axial direction, the cavity wall of the receiving cavity extends toward the central axis of the main body to form a positioning portion, and the positioning portion is formed with transmission grooves on both sides of the axial direction of the main body; Two shaft sleeves, the two shaft sleeves are arranged in the accommodating cavity, the shaft sleeves include a main body section and a transmission section, one end of the transmission section is connected to the main body section, and the other end extends along the axial direction of the main body toward a direction away from the main body section; the transmission sections of the two shaft sleeves are respectively arranged in the transmission grooves on both sides of the positioning part.

2. The coupling according to claim 1, characterized in that: The positioning portion is recessed along both sides of the main body portion in the axial direction to form the transmission groove.

3. The coupling according to claim 1, characterized in that: The central angles of two adjacent transmission sections of the same sleeve are between 30° and 180°.

4. The coupling according to claim 1, characterized in that: The number of the transmission segments on the same sleeve ranges from 2 to 12.

5. The coupling according to claim 1, characterized in that: In a cross section perpendicular to the axial direction of the sleeve, the cross section of the transmission section is circular, elliptical, polygonal or sector-shaped.

6. The coupling according to claim 1, characterized in that: A partial area of ​​the positioning portion is recessed to form a positioning groove, and the rotating shaft sleeved in the shaft sleeve can extend into the positioning groove, and the positioning groove is used to limit the rotating shaft.

7. The coupling according to claim 1, characterized in that: The coupling includes a locking piece, the main body is provided with at least two first locking holes, the two sleeves are provided with second locking holes, and the locking piece passes through the first locking hole and the second locking hole in sequence and is locked on the rotating shaft in the sleeve.

8. A rotating shaft system, characterized in that: It comprises at least two rotating shafts and the coupling according to any one of claims 1 to 7, wherein the two bushings are respectively sleeved on the two rotating shafts.

9. The shaft system according to claim 8, characterized in that: One of the sleeve and the rotating shaft is provided with a first limiting protrusion extending along the axial direction of the main body, and the other is provided with a first limiting groove extending along the axial direction of the main body. The first limiting protrusion cooperates with the first limiting groove, and the sleeve can at least limit the rotating shaft in the circumferential direction.

10. An air conditioner, characterized in that: Comprising the shaft system as claimed in claim 8 or 9.

Images