Rotating shaft system, coupler and air conditioner

Abstract

The embodiment of the utility model provides a rotating shaft system, a coupler and an air conditioner. The rotating shaft system comprises a coupler and at least two rotating shafts. The coupling 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 two shaft sleeves are arranged in the containing cavity and connected with the main body part. The two rotating shafts are sleeved with the two shaft sleeves respectively. One of the shaft sleeve and the rotating shaft is provided with a first limiting protrusion extending in the axial direction of the main body part, the other one of the shaft sleeve and the rotating shaft is provided with a first limiting groove extending in the axial direction of the main body part, and the first limiting protrusion is matched with the first limiting groove. The shaft sleeve at least can limit the rotating shaft in the circumferential direction. According to the rotating shaft system provided by the embodiment of the invention, the first limiting bulge is matched with the first limiting groove, so that the reliability of a connecting structure between the shaft sleeve and the rotating shaft is improved, the transmission mode of motion and torque between the coupler and the rotating shaft is improved, the risk of transmission failure is reduced, and the assembly efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning, and in particular to a shaft system, a coupling 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 a high speed or is subjected to a large load, slippage is likely to occur between the coupling and the shaft, posing a risk of coupling failure. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a shaft system, a coupling and an air conditioner to improve the situation where slippage easily occurs between the coupling and the shaft, resulting in the risk of failure.

[0005] To achieve the above object, one aspect of an embodiment of the present application provides a shaft system, including a coupling and at least two shafts, wherein the coupling includes:

[0006] A main body, wherein the main body has a receiving cavity, and the receiving cavity runs through two ends of the main body along the axial direction;

[0007] Two shaft sleeves, the two shaft sleeves are arranged in the accommodating cavity and connected to the main body, and the two shaft sleeves are respectively sleeved on the two rotating shafts;

[0008] Among them, 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.

[0009] In some embodiments, the two rotating shafts are provided with the first limiting grooves, and the two sleeves are provided with the first limiting protrusions; the two rotating shafts are respectively the first rotating shaft and the second rotating shaft, and the first limiting groove of the first rotating shaft is formed with the limiting surface at one end away from the second rotating shaft, and the limiting surface cooperates with the end face of the first limiting protrusion along the axial direction of the main body to limit the first rotating shaft in the axial direction of the main body.

[0010] In some embodiments, the rotating shaft system includes a retaining spring, and a portion of the outer wall of the second rotating shaft is recessed to form a retaining groove. The retaining spring cooperates with the retaining groove to limit the second rotating shaft in the axial direction of the main body.

[0011] In some embodiments, a stop surface is formed at one end of the first limiting groove of the second rotating shaft away from the first rotating shaft, and the distance between the stop surface and the side wall of the retaining spring facing the sleeve is L1, and the dimension of the first limiting groove of the first rotating shaft along the axial direction is L2, wherein L1 is greater than L2.

[0012] In some embodiments, one of the main body and the sleeve is provided with a second limiting protrusion extending along the axial direction of the main body, and the other is provided with a second limiting groove extending along the axial direction of the main body, and the second limiting protrusion cooperates with the second limiting groove, so that the main body can at least limit the sleeve in the circumferential direction.

[0013] In some embodiments, the accommodating cavity extends toward the central axis of the main body to form a partition portion, and the partition portion divides the accommodating cavity into a first chamber and a second chamber along the axial direction of the main body, and the two sleeves are respectively arranged in the first chamber and the second chamber.

[0014] In some embodiments, the coupling includes a locking piece, the two rotating shafts are provided with the first limiting grooves, the two sleeves are provided with the first limiting protrusions, the main body is provided with at least two first locking holes along the radial direction, the two sleeves are provided with second locking holes along the radial direction, the first locking holes are respectively aligned with the second locking holes of the two sleeves, and the locking piece passes through the first locking hole and the second locking hole in sequence and is locked on the bottom wall of the first limiting groove.

[0015] In some embodiments, the rotating shaft system includes a blocking member, which is disposed in the accommodating cavity and located between the end surfaces of the two rotating shafts.

[0016] Another aspect of an embodiment of the present application provides a coupling, which is a coupling of the rotating shaft system described in any one of the above items.

[0017] Another aspect of the embodiments of the present application provides an air conditioner, comprising the shaft system described in any one of the above items.

[0018] The rotating shaft system provided in the embodiment of the present application is characterized in that a first limiting protrusion extending axially along the main body is provided on one of the sleeve and the rotating shaft, and a first limiting groove extending axially along the main body is provided on the other, and the first limiting protrusion cooperates with the first limiting groove so that the sleeve can at least limit the rotating shaft in the circumferential direction. In other words, the force transmission between the sleeve and the rotating shaft is achieved through the cooperation of the first limiting protrusion and the first limiting groove, which is beneficial to improving the reliability of the connection structure between the sleeve and the rotating shaft, thereby improving the movement and torque transmission mode between the coupling and the rotating shaft, reducing the risk of transmission failure, and at the same time, positioning can be achieved through the first limiting protrusion and the first limiting groove, which is beneficial to improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded schematic diagram of a rotating shaft system provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of the rotating shaft system provided in an embodiment of the present application;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure from another perspective;

[0022] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0023] Figure 5 An exploded schematic diagram of a coupling 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. Second limiting groove; 111c. Spacer; 111d. First locking hole; 112. Bushing; 112a. First limiting protrusion; 112b. Second limiting protrusion; 112c. Second locking hole; 113. Locking member; 12. Rotating shaft; 12a. First limiting groove; 121. First rotating shaft; 121a. Limiting surface; 122. Second rotating shaft; 122a. Slot; 122b. Stop surface; 13. Retaining spring; 14. Barrier member. 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 shaft, 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 terms "center", "upper", "left", "right", "bottom", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply 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 and the motor shaft is through a coupling. The coupling is fixed to the connecting shaft and the motor shaft respectively by a screw, and the motion and torque are transmitted by the friction between the screw and the shaft. The motor shaft and the connecting shaft are separated by a rubber plug to prevent abnormal noise caused by touch. However, when the speed is high or the load is large, there is a risk of slippage between the screw and the shaft. At the same time, the screws need to be fixed to the flat part (plane) of the rotating shaft. When the assembler fixes it, manual visual positioning is required. Therefore, there is a risk of the screws hitting the arc surface of the rotating shaft, resulting in a reduction in the friction between the screws and the shaft and easy slippage, or causing burrs on the rotating shaft, making it difficult to remove the coupling.

[0032] Based on the above situation, the first aspect of the embodiment of the present application provides a shaft system 10. Figures 1 to 5The shaft system 10 includes a coupling 11 and at least two shafts 12. The coupling 11 includes a main body 111 and two sleeves 112. The main body 111 has a receiving cavity 111a. The receiving cavity 111a runs through both ends of the main body 111 in the axial direction. The two sleeves 112 are arranged in the receiving cavity 111a and connected to the main body 111. The two sleeves 112 are respectively sleeved on the two shafts 12. Among them, one of the sleeves 112 and the 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, and the first limiting protrusion 112a cooperates with the first limiting groove 12a. The sleeve 112 can at least limit the shaft 12 in the circumferential direction.

[0033] The coupling 11 is a widely used transmission component, which is mainly used to connect two shafts in different mechanisms together so that they rotate together and transmit torque.

[0034] The two rotating shafts 12 connected by the coupling 11 may be a driving shaft and a driven shaft respectively.

[0035] 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 .

[0036] Among them, the function of the connecting shaft can be a transition connection, transmitting motion and torque from the motor shaft to other components.

[0037] 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.

[0038] 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.

[0039] 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 .

[0040] The accommodating cavity 111a passes through both ends of the main body 111 in the axial direction, that is, the main body 111 can be a sleeve-like part. The axial direction of the main body 111 is the axial direction of the sleeve.

[0041] 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.

[0042] Exemplarily, the main body 111 is a rubber member, thereby reducing the number of processing steps and lowering the production cost.

[0043] Specifically, the two sleeves 112 are respectively sleeved on one end of the two rotating shafts 12, and then the rotating shafts 12 with the sleeves 112 extend into the accommodating cavity 111a from both ends of the main body 111. 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.

[0044] 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.

[0045] Exemplarily, the first limiting protrusion 112a is a key, and the first limiting groove 12a is a keyway.

[0046] Exemplarily, the number of the first limiting protrusions 112a may be one, two, three, four, five or six, etc., which is not limited here.

[0047] Exemplarily, the number of the first limiting grooves 12a may be one, two, three, four, five or six, etc., which is not limited here.

[0048] 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.

[0049] 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 transmission mode of movement and torque between the coupling 11 and the rotating shaft 12, and reducing the risk of transmission failure. At the same time, positioning can also be carried out through the first limiting protrusion 112a and the first limiting groove 12a, which is beneficial to improve assembly efficiency.

[0050] 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.

[0051] 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.

[0052] The rotating shaft system 10 provided in the embodiment of the present application is configured by providing a first limiting protrusion 112a extending axially along the main body 111 on one of the sleeve 112 and the rotating shaft 12, and providing a first limiting groove 12a extending axially along the main body 111 on the other, and the first limiting protrusion 112a cooperates with the first limiting groove 12a, so that the sleeve 112 can at least limit the rotating shaft 12 in the circumferential direction. That is to say, the first limiting protrusion 112a cooperates with the first limiting groove 12a to realize the transmission of force between the sleeve 112 and the rotating shaft 12, which is beneficial to improving 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 by the first limiting protrusion 112a and the first limiting groove 12a, which is beneficial to improving assembly efficiency.

[0053] For some examples, see Figures 1 to 5 , the two rotating shafts 12 are provided with first limiting grooves 12a. The two shaft sleeves 112 are provided with first limiting protrusions 112a. The two rotating shafts 12 are respectively a first rotating shaft 121 and a second rotating shaft 122. The first limiting groove 12a of the first rotating shaft 121 forms a limiting surface 121a at one end away from the second rotating shaft 122. The limiting surface 121a cooperates with the end surface of the first limiting protrusion 112a along the axial direction of the main body 111, and is used to limit the first rotating shaft 121 in the axial direction of the main body 111.

[0054] It should be noted that the rotating shaft 12 is usually made of a heavier material with greater rigidity, such as steel, and the shaft sleeve 112 is usually made of a lighter material, such as aluminum. By providing the first limiting groove 12a on the rotating shaft 12 and the first limiting protrusion 112a on the shaft sleeve 112, the weight of the rotating shaft 12 can be reduced, thereby reducing the starting torque and starting power of the motor in the rotating shaft system 10, and reducing the requirements for the motor performance.

[0055] The two rotating shafts 12 are respectively a first rotating shaft 121 and a second rotating shaft 122. Exemplarily, the first rotating shaft 121 is a motor shaft, and the second rotating shaft 122 is a connecting shaft.

[0056] The connecting shaft can be a hollow shaft or a solid shaft. The use of a hollow shaft can reduce weight, reduce costs, and reduce the starting power and starting torque of the motor.

[0057] The limiting surface 121 a of the first limiting groove 12 a of the first rotating shaft 121 at one end away from the second rotating shaft 122 refers to the groove wall of the first limiting groove 12 a away from the axial end of the second rotating shaft 122 .

[0058] Therefore, the limiting surface 121a cooperates with the first limiting protrusion 112a along the axial end surface of the main body 111 to perform unidirectional limiting on the first rotating shaft 121 in the axial direction of the main body 111, so that when the first rotating shaft 121 is extended into the sleeve 112, the first limiting protrusion 112a of the sleeve 112 sleeved outside the first rotating shaft 121 blocks the limiting surface 121a at the axial end surface, so that the first rotating shaft 121 cannot continue to enter the sleeve 112, thereby realizing unidirectional axial positioning of the first rotating shaft 121.

[0059] For some examples, see Figure 1 , Figure 3 and Figure 4 The shaft system 10 includes a retaining spring 13. A portion of the outer wall of the second shaft 122 is concave to form a retaining groove 122a. The retaining spring 13 cooperates with the retaining groove 122a to limit the second shaft 122 in the axial direction of the main body 111.

[0060] By cooperating with the retaining spring 13 and the retaining groove 122a, when the second rotating shaft 122 extends into the sleeve 112, the first limiting protrusion 112a of the sleeve 112 sleeved outside the second rotating shaft 122 contacts the end face of the retaining spring 13 at the axial end face, thereby preventing the second rotating shaft 122 from continuing to enter the sleeve 112, thereby realizing the axial positioning of the second rotating shaft 122.

[0061] In this way, the first rotating shaft 121 and the second rotating shaft 122 are axially limited in one direction by the limiting surface 121a and the clamping spring 13, respectively, which can improve the situation that the rotating shaft 12 shakes or produces abnormal noise when rotating due to the axial end surface contact between the first rotating shaft 121 and the second rotating shaft 122. At the same time, the barrier 14 set between the first rotating shaft 121 and the second rotating shaft 122 for separating the two rotating shafts 12 can be omitted, thereby improving the situation that the barrier 14 is easily missed during the assembly process, reducing the parts required for assembly, and improving the efficiency of assembly.

[0062] For some examples, see Figures 1 to 4A stop surface 122b is formed at one end of the first limiting groove 12a of the second rotating shaft 122 away from the first rotating shaft 121. The distance between the stop surface 122b and the side wall of the retaining spring 13 facing the sleeve 112 is L1. The axial dimension of the first limiting groove 12a of the first rotating shaft 121 is L2. Among them, L1 is greater than L2.

[0063] A stop surface 122 b is formed at one end of the first limiting groove 12 a of the second rotating shaft 122 away from the first rotating shaft 121 , that is, a groove wall at an axial end of the first limiting groove 12 a .

[0064] L1 is greater than L2, which means L1 is greater than or equal to L2.

[0065] It should be noted that, when the coupling 11 is assembled, the first rotating shaft 121 and the second rotating shaft 122 are usually relatively fixed. When the first rotating shaft 121 and its components, the second rotating shaft 122 and its components, or the coupling 11 need to be maintained and disassembled, it is usually necessary to move the first rotating shaft 121 or the second rotating shaft 122 axially so that the two rotating shafts 12 are away from each other and at least one rotating shaft 12 can be completely withdrawn from the coupling 11, so that the coupling 11 can be disassembled.

[0066] In this way, when the axial movement distance of the second shaft 122 away from the first shaft 121 is limited, L1 is greater than L2, which enables the coupling 11 to move axially toward the second shaft 122 until the first shaft 121 completely withdraws from the coupling 11, which is beneficial to the disassembly and maintenance of the coupling 11.

[0067] For some examples, see Figure 2 and Figure 5 One of the main body 111 and the sleeve 112 is provided with a second limiting protrusion 112b extending along the axial direction of the main body 111, and the other is provided with a second limiting groove 111b extending along the axial direction of the main body 111. The second limiting protrusion 112b cooperates with the second limiting groove 111b. The main body 111 can at least limit the sleeve 112 in the circumferential direction.

[0068] It should be noted that the sleeve 112 may be provided with a second limiting protrusion 112b extending along the axial direction of the main body 111, and the main body 111 may be provided with a second limiting groove 111b extending along the axial direction of the main body 111; or the main body 111 may be provided with a second limiting protrusion 112b extending along the axial direction of the main body 111, and the sleeve 112 may be provided with a second limiting groove 111b extending along the axial direction of the main body 111.

[0069] Exemplarily, the number of the second limiting protrusions 112b may be one, two, three, four, five or six, etc., which is not limited here.

[0070] For example, the number of the second limiting grooves 111 b may be one, two, three, four, five or six, etc., which is not limited here.

[0071] The second limiting protrusion 112b cooperates with the second limiting groove 111b, so that the circumferential side wall of the second limiting protrusion 112b contacts the circumferential side wall of the second limiting groove 111b, so that the main body 111 can at least limit the shaft sleeve 112 in the circumferential direction, and the movement and torque of the driven rotating shaft 12 are transmitted to the driven rotating shaft 12 through the circumferential limitation between the main body 111 and the shaft sleeve 112, thereby further improving the movement and torque transmission method between the coupling 11 and the rotating shaft 12 and reducing the risk of transmission failure.

[0072] The second limiting protrusion 112b may be integrally formed with the shaft sleeve 112 or the main body 111 on which it is disposed, or may be a split design.

[0073] The main body 111 can at least limit the position of the sleeve 112 in the circumferential direction, that is, the cooperation between the second limiting protrusion 112b and the second limiting groove 111b can also enable the main body 111 to limit the position of the sleeve 112 in the axial direction.

[0074] The inner wall of the accommodating cavity 111 a of the main body 111 and the outer wall of the shaft sleeve 112 may be in a clearance fit, an interference fit, an adhesive fit or other forms, which are not limited here.

[0075] Here, through the cooperation between the second limiting protrusion 112b and the second limiting groove 111b, the circumferential limitation between the main body 111 and the sleeve 112 is strengthened, thereby increasing the transmission reliability between the main body 111 and the sleeve 112, thereby further improving the movement and torque transmission mode between the coupling 11 and the rotating shaft 12, and reducing the risk of transmission failure.

[0076] For some examples, see Figure 4 and Figure 5 The accommodating cavity 111a extends toward the central axis of the main body 111 to form a partition 111c. The partition 111c divides the accommodating cavity 111a into a first cavity and a second cavity along the axial direction of the main body 111, and the two sleeves 112 are respectively disposed in the first cavity and the second cavity.

[0077] When the coupling 11 connects two shafts, the two sleeves 112 are respectively disposed in the first chamber and the second chamber, and at least part of the end faces of the two sleeves 112 can be respectively stopped on the opposite side walls of the spacer 111c. Thus, the two sleeves 112 can be axially positioned in one direction, thereby reducing the probability of the two sleeves 112 contacting each other and causing damage, and improving the assembly efficiency of the coupling 11.

[0078] Exemplarily, the main body 111 and the spacer 111 c are rubber parts, respectively, thereby reducing the number of processing steps and the production cost.

[0079] Further, the main body 111 and the spacer 111c are an integrally formed part. In other words, the spacer 111c can be integrally formed on the inner wall of the cavity of the main body 111. For example, the main body 111 and the spacer 111c can be integrally formed by injection molding.

[0080] In addition, the two sleeves 112 may also be respectively interference-fitted with the side walls of the accommodating cavity 111 a , thereby further improving the connection reliability between the two sleeves 112 and the main body 111 .

[0081] Thus, the accommodating cavity 111a extends toward the central axis of the main body 111 to form a partition 111c. The partition 111c divides the accommodating cavity 111a into a first chamber and a second chamber along the axial direction of the main body 111. The partition 111c axially positions the two sleeves 112, which is convenient for assembly and reduces the probability of damage caused by contact between the two sleeves 112.

[0082] For some examples, see Figures 1 to 5 The coupling 11 includes a locking member 113. The two rotating shafts 12 are provided with a first limiting groove 12a. The two shaft sleeves 112 are provided with a first limiting protrusion 112a. The main body 111 is provided with at least two first locking holes 111d in the radial direction. The two shaft sleeves 112 are provided with second locking holes 112c in the radial direction. The first locking holes 111d are respectively aligned with the second locking holes 112c of the two shaft sleeves 112. The locking member 113 passes through the first locking hole 111d and the second locking hole 112c in sequence and is locked on the bottom wall of the first limiting groove 12a.

[0083] Exemplarily, the locking member 113 is a locking screw or a locking bolt, etc., which is not limited here.

[0084] It should be noted that the bottom wall may be a plane, so as to increase the contact area between the locking member 113 and the bottom wall, increase the friction force, and enhance the fixing effect of the locking member 113 .

[0085] While the locking piece 113 abuts against the bottom wall of the first limiting groove 12a, the locking piece 113 can also limit the side walls on both sides of the circumference of the first limiting groove 12a, and can perform axial and circumferential limiting, thereby improving the reliability of the locking piece 113 fixing the rotating shaft 12.

[0086] At the same time, during the assembly process, the locking member 113 does not need to be manually aligned to the (flattened) plane of the shaft 12 when being locked, which improves the assembly efficiency and improves the situation where the locking member 113 hits the arc surface.

[0087] In this way, the locking piece 113 passes through the first locking hole 111d and the second locking hole 112c in sequence and is locked on the bottom wall of the first limiting groove 12a, so that the locking piece 113 can be fixed to the main body 111 and the sleeve 112 in the axial and circumferential directions respectively. At the same time, the locking piece 113 is locked on the bottom wall of the first limiting groove 12a, so that the main body 111, the two sleeves 112 and the two rotating shafts 12 are fixed, thereby improving the reliability of the locking piece 113 fixing the rotating shaft 12, improving the assembly efficiency, and improving the situation where the locking piece 113 hits the arc surface.

[0088] For some examples, see Figure 1 and Figure 4 The shaft system 10 includes a barrier 14 . The barrier 14 is disposed in the accommodating cavity 111 a and is located between the end surfaces of the two shafts 12 .

[0089] Exemplarily, the barrier 14 may be a rubber stopper.

[0090] It should be noted that the blocking member 14 may be disposed on one of the two rotating shafts 12 , or may be disposed on both rotating shafts 12 .

[0091] Exemplarily, the end of the connecting shaft installed in the coupling 11 is provided with a plug hole, the blocking member 14 is inserted into the plug hole, and the end faces of the motor shaft and the connecting shaft are respectively in axial contact with the rubber plug.

[0092] Here, by providing the blocking member 14 between the end surfaces of the two rotating shafts 12 , the ends of the two rotating shafts 12 can be prevented from colliding, thereby effectively reducing the probability of damage to the rotating shafts 12 .

[0093] A second aspect of the embodiments of the present application provides a coupling 11 , and the coupling 11 is the coupling 11 of the rotating shaft system 10 provided in any embodiment of the present application.

[0094] The coupling 11 provided in the embodiment of the present application is provided with a first limiting protrusion 112a extending axially along the main body 111 on one of the sleeve 112 of the coupling 11 and the shaft 12 in the shaft system 10, and the other is provided with a first limiting groove 12a extending axially along the main body 111. 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 shaft 12 in the circumferential direction, and the movement and torque of the driven shaft 12 are transmitted to the driven shaft 12 through the circumferential limitation, thereby improving the movement and torque transmission mode between the coupling 11 and the shaft 12, and reducing the risk of transmission failure of the coupling 11. At the same time, the first limiting protrusion 112a and the first limiting groove 12a have their own positioning function, which can improve the assembly efficiency.

[0095] A third aspect of the embodiments of the present application provides an air conditioner, comprising the shaft system 10 provided in any embodiment of the present application.

[0096] Exemplarily, the air conditioner includes a fan or a fan assembly.

[0097] Exemplarily, the coupling 11 is used for a fan blade assembly of an air-conditioning duct unit.

[0098] The air conditioner provided in the embodiment of the present application improves the movement and torque transmission mode between the coupling 11 and the rotating shaft 12 through the first limiting protrusion 112a and the first limiting groove 12a set on the sleeve 112 of the coupling 11 and the rotating shaft 12 in the rotating shaft system 10, reduces the risk of transmission failure, and thus improves the stability and reliability of the air conditioner operation.

[0099] 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.

[0100] 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 rotating shaft system, characterized in that: The invention comprises a coupling and at least two rotating shafts, wherein the coupling comprises: A main body, wherein the main body has a receiving cavity, and the receiving cavity passes through two ends of the main body along the axial direction; Two shaft sleeves, the two shaft sleeves are arranged in the accommodating cavity and connected to the main body, and the two shaft sleeves are respectively sleeved on the two rotating shafts; Among them, 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.

2. The shaft system according to claim 1, characterized in that: The two rotating shafts are provided with the first limiting grooves, and the two sleeves are provided with the first limiting protrusions; the two rotating shafts are respectively the first rotating shaft and the second rotating shaft, and the first limiting groove of the first rotating shaft forms a limiting surface at one end away from the second rotating shaft, and the limiting surface cooperates with the first limiting protrusion along the axial end surface of the main body to limit the first rotating shaft in the axial direction of the main body.

3. The shaft system according to claim 2, characterized in that: The rotating shaft system includes a retaining spring, and a portion of the outer side wall of the second rotating shaft is concave to form a retaining groove. The retaining spring cooperates with the retaining groove to limit the second rotating shaft in the axial direction of the main body.

4. The shaft system according to claim 3, characterized in that: A stop surface is formed at one end of the first limiting groove of the second rotating shaft away from the first rotating shaft, and the distance between the stop surface and the side wall of the retaining spring facing the sleeve is L1. The dimension of the first limiting groove of the first rotating shaft along the axial direction is L2, wherein L1 is greater than L2.

5. The shaft system according to claim 1, characterized in that: One of the main body and the sleeve is provided with a second limiting protrusion extending along the axial direction of the main body, and the other is provided with a second limiting groove extending along the axial direction of the main body, the second limiting protrusion cooperates with the second limiting groove, and the main body can at least limit the sleeve in the circumferential direction.

6. The shaft system according to claim 1, characterized in that: The accommodating cavity extends toward the central axis of the main body to form a partition portion, and the partition portion divides the accommodating cavity into a first cavity and a second cavity along the axial direction of the main body. The two sleeves are respectively disposed in the first cavity and the second cavity.

7. The shaft system according to claim 1, characterized in that: The coupling includes a locking piece, the two rotating shafts are provided with the first limiting grooves, the two sleeves are provided with the first limiting protrusions, the main body is provided with at least two first locking holes, and 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 bottom wall of the first limiting groove.

8. The shaft system according to claim 1, characterized in that: The rotating shaft system comprises a blocking member, which is arranged in the accommodating cavity and located between the end surfaces of the two rotating shafts.

9. A coupling, characterized in that: The coupling is a coupling of the rotating shaft system according to any one of claims 1 to 8.

10. An air conditioner, characterized in that: A shaft system comprising any one of claims 1 to 8.

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