Fan head and fan

Abstract

The utility model relates to a fan head and a fan. The fan head comprises a supporting frame and a motor, the air duct assembly is rotatably arranged on the supporting frame around the axis of the air duct assembly, and the peripheral surface of the air duct assembly is circular; the driving mechanism is used for driving the air duct assembly to rotate relative to the supporting frame, the driving mechanism comprises an arc-shaped rack arranged on the peripheral face and a gear rotationally arranged on the supporting frame, the extending direction of the arc-shaped rack is the same as the circumferential direction of the peripheral face, and the gear is located at the bottom of the air duct assembly and connected with the arc-shaped rack in a meshed mode; the diameter D1 of the gear, the diameter D2 of the circle where the arc-shaped rack is located and the center distance L between the gear and the arc-shaped rack meet the condition that L is larger than (D1 + D2) / 2. According to the fan head, the overall axial width of the fan head is effectively reduced, the overall space utilization rate of the fan head is increased, meanwhile, the operation stability and reliability of the fan head are improved, and the air supply efficiency of the fan head is improved.

Description

Technical Field

[0001] This application relates to the field of fan technology, and in particular to a fan head and a fan. Background Technology

[0002] The fan head of the air cooler includes a support component, an air duct assembly, and a drive mechanism. The air duct assembly is rotatably mounted on the support component, and the drive mechanism drives the air duct assembly to rotate relative to the support component, thereby achieving multi-angle air delivery.

[0003] In related technologies, the drive mechanism is located on the rotation axis of the duct assembly. This results in a large axial width of the fan head, which is not conducive to the overall space optimization of the fan head and leads to low overall space utilization. In addition, the stability and reliability of the drive mechanism in driving the duct assembly to rotate are poor, affecting the air delivery efficiency of the fan head. Utility Model Content

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application provides a fan head and a fan, which effectively reduces the overall axial width of the fan head, improves the overall space utilization of the fan head, and at the same time improves the stability and reliability of the fan head operation and the air delivery efficiency of the fan head.

[0005] In a first aspect, this application provides a fan head, comprising:

[0006] Support frame;

[0007] The air duct assembly is rotatably mounted on the support frame around its own axis, and the outer peripheral surface of the air duct assembly is circular.

[0008] A drive mechanism is provided for driving the air duct assembly to rotate relative to the support frame. The drive mechanism includes an arc-shaped rack disposed on the outer peripheral surface and a gear rotatably disposed on the support frame. The extension direction of the arc-shaped rack is the same as the circumferential direction of the outer peripheral surface. The gear is located at the bottom of the air duct assembly and meshes with the arc-shaped rack.

[0009] Wherein, the diameter D1 of the gear, the diameter D2 of the circle containing the arc rack, and the center distance L between the gear and the arc rack satisfy: L>(D1+D2) / 2.

[0010] The fan head according to the first aspect of this application has at least the following beneficial effects:

[0011] The fan head of this application, through the coordinated arrangement of the support frame, air duct assembly, and drive mechanism, sets the drive mechanism as a gear and arc-shaped rack transmission structure. This ensures that the drive mechanism as a whole does not occupy the axial space of the fan head, effectively reducing the overall axial width of the fan head and improving the overall space utilization of the fan head. The center distance L between the gear and the arc-shaped rack, the diameter D1 of the gear, and the diameter D2 of the circle containing the arc-shaped rack are set to L > (D1 + D2) / 2, creating a small gap between the addendum circle of the gear and the root circle of the arc-shaped rack. This small gap allows the gear and the arc-shaped rack to automatically adapt to tolerance changes and deformation during meshing, ensuring smooth meshing and improving the transmission stability of the gear and the arc-shaped rack. This also improves the stability and reliability of the air duct assembly rotation, thereby increasing the air delivery efficiency of the fan head.

[0012] In some embodiments, the diameter D1 of the gear, the diameter D2 of the circle containing the arc rack, and the center distance L between the gear and the arc rack satisfy: L-λ=(D1+D2) / 2, 0≤λ≤0.75mm.

[0013] In some embodiments, the module of the gear and the module of the arc rack are both M, and M and λ satisfy: (0.25*M-0.1)≤λ≤(0.25*M+0.1).

[0014] In some embodiments, the central axis of the gear is located outside the air duct assembly and is parallel to the rotation axis of the air duct assembly.

[0015] In some embodiments, the air duct assembly includes an air duct shell and a fan wheel rotatably disposed within the air duct shell. An air duct cavity is formed within the air duct shell. An air inlet and an air outlet are provided on the air duct shell. The air inlet communicates with the air outlet through the air duct cavity. The outer periphery of the air duct shell forms the outer peripheral surface.

[0016] In some embodiments, the duct housing includes a first housing and a second housing, which are detachably joined together to form the duct cavity.

[0017] In some embodiments, a first flange is formed on the circumferential edge of the first housing facing one end of the second housing, and a second flange is formed on the circumferential edge of the second housing facing one end of the first housing, wherein the first flange and the second flange are mated together.

[0018] In some embodiments, the air duct assembly further includes bushings, and the support frame has two bushings, each of which has a shaft hole. The two opposite ends of the air duct shell along the axial direction are respectively rotatably connected to the shaft holes of the two support frames through bushings.

[0019] In some embodiments, the support frame includes a base frame and two side frames detachably connected to the base frame. The base frame is located at the bottom of the air duct assembly, and a first mounting groove for mounting the gear is provided on the base frame. The two opposite ends of the air duct assembly along the axial direction are respectively rotatably connected to the two side frames.

[0020] Secondly, this application provides a fan, which includes the fan head described above.

[0021] The fan according to the second aspect of this application has at least the following beneficial effects:

[0022] The fan of this application, equipped with the aforementioned fan head, also possesses the same technical effects as the aforementioned fan head. Specifically, through the coordinated arrangement of the support frame, air duct assembly, and drive mechanism, the drive mechanism is configured as a gear and arc-shaped rack transmission structure. This ensures that the drive mechanism as a whole does not occupy axial space in the fan head, effectively reducing the overall axial width of the fan head and improving the overall space utilization of the fan head. The center distance L between the gear and the arc-shaped rack, the diameter D1 of the gear, and the diameter D2 of the circle containing the arc-shaped rack are set to L > (D1 + D2) / 2, creating a small gap between the addendum circle of the gear and the root circle of the arc-shaped rack. This small gap allows the gear and arc-shaped rack to automatically adapt to tolerance changes and deformation during meshing, ensuring smooth meshing, improving the transmission stability of the gear and arc-shaped rack, enhancing the stability and reliability of the air duct assembly rotation, and ultimately improving the air delivery efficiency of the fan head.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0025] Figure 1 This is a schematic diagram of the fan head structure according to an embodiment of this application.

[0026] Figure 2 This is a cross-sectional structural diagram of the fan head according to an embodiment of this application.

[0027] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0028] Figure 4 This is an exploded view of the fan head structure according to an embodiment of this application.

[0029] Figure 5 for Figure 4 A magnified view of a section at point B.

[0030] Figure 6 This is another cross-sectional structural diagram of the fan head according to an embodiment of this application.

[0031] Figure 7 for Figure 6 A magnified view of a section at point C.

[0032] Figure 8 This is an exploded view of the air duct shell according to an embodiment of this application.

[0033] Figure 9 This is a schematic diagram of the base frame in an embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: support frame 100; shaft hole 110; base frame 120; first mounting groove 121; side frame 130; air duct assembly 200; outer peripheral surface 201; air duct shell 210; air duct cavity 211; air inlet 212; air outlet 213; first housing 214; first flange 2141; second housing 215; second flange 2151; second mounting groove 216; impeller 220; second drive component 230; bushing 240; drive mechanism 300; gear 310; arc rack 320; first drive component 330; outer shell 400; air inlet grille 410; air outlet grille 420; covering cavity 430. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] The fan head of the air cooler includes a support component, an air duct assembly, and a drive mechanism. The air duct assembly is rotatably mounted on the support component, and the drive mechanism drives the air duct assembly to rotate relative to the support component, thereby achieving multi-angle air delivery.

[0042] In related technologies, the drive mechanism is set on the rotation axis of the air duct assembly, which results in a large axial width of the fan head, which is not conducive to the overall space optimization of the fan head and leads to a low overall space utilization rate of the fan head. In addition, the stability and reliability of the drive mechanism in driving the air duct assembly to rotate are poor, which affects the air delivery efficiency of the fan head.

[0043] Addressing the issues of low overall space utilization and low air delivery efficiency in related technologies, one or more embodiments of this application provide a fan head. The fan head of this application embodiment, through the coordinated arrangement of a support frame, air duct assembly, and drive mechanism, sets the drive mechanism as a gear and arc-shaped rack transmission structure. This ensures that the drive mechanism does not occupy axial space in the fan head, effectively reducing the overall axial width of the fan head and improving the overall space utilization. The center distance L between the gear and the arc-shaped rack is... The diameters D1 of the gear and D2 of the circle containing the arc rack are set to L > (D1 + D2) / 2, creating a small gap between the addendum circle of the gear and the root circle of the arc rack. This small gap allows the gear and the arc rack to automatically adapt to tolerance changes and deformations during meshing, ensuring smooth meshing and improving transmission stability. This enhances the stability and reliability of the duct assembly rotation, thereby increasing the air delivery efficiency of the fan head.

[0044] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application provides a fan head, which includes a support frame 100, an air duct assembly 200, and a drive mechanism 300.

[0045] The air duct assembly 200 is rotatably mounted on the support frame 100 around its own axis, and the outer peripheral surface 201 of the air duct assembly 200 is circular.

[0046] The drive mechanism 300 is used to drive the air duct assembly 200 to rotate relative to the support frame 100. The drive mechanism 300 includes an arc-shaped rack 320 disposed on the outer peripheral surface 201 and a gear 310 rotatably disposed on the support frame 100. The extension direction of the arc-shaped rack 320 is the same as the circumferential direction of the outer peripheral surface 201. The gear 310 is located at the bottom of the air duct assembly 200 and meshes with the arc-shaped rack 320.

[0047] Among them, the diameter D1 of gear 310, the diameter D2 of the circle containing the arc rack 320, and the center distance L between gear 310 and arc rack 320 satisfy: L>(D1+D2) / 2.

[0048] It should be noted that, in this application, see [reference needed]. Figure 2 and Figure 4 The air duct assembly 200 has a rotating structure and may include an air duct shell 210, a fan 220 rotatably disposed within the air duct shell 210, and a second drive member 230 disposed within the air duct shell 210. An air duct cavity 211 is formed inside the air duct shell 210. An air inlet 212 is provided at least one end of the air duct shell 210 along its axial direction. An outer peripheral surface 201 of the entire air duct assembly 200 is formed on the outer periphery of the air duct shell 210. The outer peripheral surface 201 is an annular surface, and an air outlet 213 is provided on the outer peripheral surface 201 of the air duct shell 210.

[0049] The output end of the second driving component 230 is connected to the impeller 220 to drive the impeller 220 to rotate around its own axis within the air duct cavity 211, creating a low-pressure zone within the air duct cavity 211. Air enters the air duct cavity 211 from the air inlet 212 at the end of the air duct shell 210 and is then blown out from the air outlet 213 on the outer periphery of the air duct shell 210, thus achieving efficient air delivery from the air duct assembly 200. The impeller 220 can be a centrifugal impeller, and the second driving component 230 can be a rotary driving component such as a motor.

[0050] The air duct assembly 200 is rotatably connected to the support frame 100 around its own axis. For example, the air duct assembly 200 is rotatably connected to the support frame 100 through its own air duct shell 210. The drive mechanism 300 drives the air duct assembly 200 to rotate as a whole by driving the air duct shell 210 to rotate relative to the support frame 100, thereby achieving the effect of multi-angle air delivery from the fan head (the air outlet 213 on the air duct assembly 200 faces different directions in space).

[0051] In the drive mechanism 300 of this application, the drive mechanism 300 may further include a first drive member 330, which is installed at the bottom of the support frame 100, and both the first drive member 330 and the gear 310 are located at the bottom of the air duct assembly 200. The output end of the first drive member 330 is connected to the gear 310, and the gear 310 meshes with the arc-shaped rack 320 on the outer peripheral surface 201 of the air duct assembly 200. The first drive member 330 drives the air duct assembly 200 to rotate relative to the support frame 100 through the transmission action of the gear 310 and the arc-shaped rack 320, thereby achieving the effect of multi-angle air delivery from the fan head.

[0052] In this application, the arc-shaped rack 320 can be a complete circular gear, in which case the central angle corresponding to the arc of the arc-shaped rack 320 is 360°; the arc-shaped rack 320 can also be a segment of a superior or inferior arc rack, in which case the central angle corresponding to the arc of the arc of the arc rack 320 is less than 360°. For example, in this application, the arc-shaped rack 320 is a segment of an inferior arc rack, and the transmission cooperation between the gear 310 and the arc-shaped rack 320 causes the air duct assembly 200 to reciprocate within a certain angle range, enabling the fan head to have the function of oscillating airflow up and down.

[0053] It should be noted that by configuring the drive mechanism 300 as a gear 310 and an arc-shaped rack 320, and setting the gear 310 at the bottom of the air duct assembly 200 and the arc-shaped rack 320 on the outer peripheral surface 210 of the air duct assembly 200, this application achieves the effect of driving the air duct assembly 200 to rotate relative to the support frame 100, while ensuring that the drive mechanism 300 does not occupy the axial space of the fan head, effectively reducing the axial width of the fan head and improving the overall space utilization of the fan head. On the other hand, by utilizing the good load-bearing capacity and transmission accuracy of the gear and rack, the stability and reliability of the rotation of the air duct assembly 200 are improved, thereby improving the air delivery efficiency of the fan head.

[0054] In addition, it should be noted that, see Figure 3 , Figure 4 and Figure 5 In the drive mechanism 300 of this application, the gear 310 is a standard cylindrical gear, and the arc-shaped rack 320 is a portion of the arc-shaped section of the standard cylindrical gear. The gear 310 is located at the bottom of the arc-shaped rack 320 and meshes with the arc-shaped rack 320.

[0055] The center distance between gear 310 and arc rack 320 is the distance between the center of gear 310 and the center of the circle containing arc rack 320. Generally speaking, in order to ensure stable transmission between gear 310 and arc rack 320, the center distance between gear 310 and arc rack 320 is equal to half the sum of the diameter of gear 310 (the pitch circle diameter of gear 310) and the diameter of the circle containing arc rack 320 (the pitch circle diameter of the gear containing arc rack 320). That is, the center distance between gear 310 and arc rack 320 is the conventional design value.

[0056] In this application, in order to reduce the space occupied by the gear 310 during assembly, the diameter of the gear 310 is set to be much smaller than the diameter of the circle in which the arc rack 320 is located, and the diameter of the circle in which the arc rack 320 is located is almost equal to the outer diameter of the entire air duct assembly 200.

[0057] The arc-shaped rack 320 has a large diameter, resulting in significant injection molding tolerances. The large diameter difference between the gear 310 and the arc-shaped rack 320 also leads to substantial assembly tolerances. Furthermore, during long-term use of the fan head, the mating structure of the gear 310 and the arc-shaped rack 320 may deform downwards due to the gravity of the air duct assembly 200.

[0058] The large injection molding tolerance of the arc-shaped rack 320, the assembly tolerance between the gear 310 and the arc-shaped rack 320, and the deformation of the mating structure of the gear 310 and the arc-shaped rack 320 under the long-term influence of the gravity of the air duct assembly 200 all make it difficult for the gear 310 and the arc-shaped rack 320 to mesh smoothly, reducing the transmission stability of the gear 310 and the arc-shaped rack 320.

[0059] Based on this, this application sets the center distance L between gear 310 and arc rack 320, the diameter D1 of gear 310, and the diameter D2 of the circle containing arc rack 320 to L > (D1 + D2) / 2, making the center distance between gear 310 and arc rack 320 greater than the conventional design value, and creating a small radial clearance between the addendum circle of gear 310 and the root circle of arc rack 320. Through this small radial clearance, gear 310 and arc rack 320 automatically adapt to tolerance changes and deformation during meshing transmission, ensuring smooth meshing and improving the transmission stability of gear 310 and arc rack 320. This also improves the stability and reliability of the rotation of the duct assembly 200, thereby increasing the air delivery efficiency of the fan head.

[0060] From the above description, it is easy to understand that the fan head of this embodiment, through the cooperative arrangement of the support frame 100, the air duct assembly 200, and the drive mechanism 300, sets the drive mechanism 300 as a transmission structure of gear 310 and arc rack 320. This ensures that the drive mechanism 300 does not occupy the axial space of the fan head, effectively reducing the overall axial width of the fan head and improving the overall space utilization of the fan head. The center distance L between gear 310 and arc rack 320, the diameter D1 of gear 310, and the diameter D2 of the circle containing arc rack 320 are set to L. > (D1+D2) / 2, so that there is a small gap between the tip circle of gear 310 and the root circle of arc rack 320. Through the small gap between the tip circle of gear 310 and the root circle of arc rack 320, gear 310 and arc rack 320 automatically adapt to the tolerance changes and deformation between gear 310 and arc rack 320 during meshing transmission, so that gear 310 and arc rack 320 mesh smoothly, improve the transmission stability of gear 310 and arc rack 320, improve the stability and reliability of the rotation of air duct assembly 200, and thus improve the air delivery efficiency of fan head.

[0061] In some embodiments of this application, see Figure 6 and Figure 7 The diameter D1 of gear 310, the diameter D2 of the circle containing the arc rack 320, and the center distance L between gear 310 and arc rack 320 satisfy: L-λ=(D1+D2) / 2, 0≤λ≤0.75mm (millimeters).

[0062] It can be understood that λ is the difference between the actual value and the conventional design value of the center distance between gear 310 and the arc-shaped rack 320, also known as the center distance margin λ between gear 310 and the arc-shaped rack 320. See [link to relevant documentation] Figure 6 and Figure 7 λ also refers to the radial clearance between the addendum circle of gear 310 and the root circle of arc rack 320, which is the clearance between the addendum circle of gear 310 and the root circle of arc rack 320.

[0063] It should be noted that the center distance margin λ is much smaller than the diameter D1 of gear 310 and also much smaller than the diameter D2 of the circle where the arc rack 320 is located, ensuring normal meshing and transmission between gear 310 and arc rack 320.

[0064] Based on the actual injection molding tolerance of the arc-shaped rack 320, the assembly tolerance between the gear 310 and the arc-shaped rack 320, and the deformation of the mating structure of the gear 310 and the arc-shaped rack 320 under the long-term influence of the gravity of the air duct assembly 200, the center distance allowance λ is controlled within the range of 0 to 0.75 mm. This avoids the center distance allowance λ between the gear 310 and the arc-shaped rack 320 being too large, which would cause the gear 310 and the arc-shaped rack 320 to disengage, and also avoids the center distance allowance λ between the gear 310 and the arc-shaped rack 320 being too small, which would make it difficult for the gear 310 and the arc-shaped rack 320 to automatically adapt to the tolerance changes and deformation during the meshing transmission process. This improves the transmission stability of the gear 310 and the arc-shaped rack 320, improves the rotational stability and reliability of the air duct assembly 200, and thus improves the air delivery efficiency of the fan head.

[0065] In some specific embodiments of this application, the center distance margin λ is 0.7, 0.8 mm, 0.9 mm, etc.

[0066] In some embodiments of this application, the module of gear 310 and the module of arc rack 320 are both M, and M and λ satisfy: (0.25*M-0.1)≤λ≤(0.25*M+0.1).

[0067] It should be noted that in this application, gear 310 is a standard cylindrical gear, and the arc-shaped rack 320 is a portion of the arc-shaped segment of the standard cylindrical gear. In the standard cylindrical gear structure design, the tooth height h of gear 310 is h = 2.25 * M, where M is the module of gear 310, and the arc-shaped rack 320 is similarly defined.

[0068] Based on h=2.25*M, (D1+D2) / 2=(Z1+Z2)*M / 2, where Z1 is the number of teeth of gear 310, Z2 is the number of teeth of the gear corresponding to the arc rack 320, and L-λ=(D1+D2) / 2, we get λ=L-(D1+D2) / 2=L-(Z1+Z2)*h / 4.5, that is, λ / h=L / h-(Z1+Z2) / 4.5.

[0069] When designing the meshing gear 310 and the arc rack 320, the center distance L between the gear 310 and the arc rack 320 is first determined based on the design space of the fan head. Then, the diameter D1 of the gear 310 and the diameter D2 of the circle containing the arc rack 320 are determined based on the design space of the gear 310 and the arc rack 320. The number of teeth and tooth height of the gear 310 or the arc rack 320 are adjusted by adjusting different modules. Based on multiple experimental data, the module M of the gear 310 or the arc rack 320 and the center distance margin λ satisfy the following relationship: (0.25*M-0.1)≤λ≤(0.25*M+0.1).

[0070] Taking the relevant dimensions of the fan head actually produced in this application as an example: the maximum space design value of the center distance L between gear 310 and arc rack 320 is 141.5mm. The module M of gear 310 or arc rack 320 is selected as 3. The number of teeth Z1 of gear 310 is 10, and the number of teeth Z2 of the gear corresponding to arc rack 320 is 84. According to h=2.25*M and the above calculation of λ / h=L / h-(Z1+Z2) / 4.5, λ=0.54mm, which satisfies (0.25*M-0.1)≤λ≤(0.25*M+0.1), that is, 0.65mm≤λ≤0.75mm.

[0071] It should be understood that by ensuring that the module M of gear 310 or the module M of arc rack 320 and the center distance allowance λ satisfy (0.25*M-0.1)≤λ≤(0.25*M+0.1), it is possible to avoid the center distance allowance λ between gear 310 and arc rack 320 being too large, which would cause gear 310 and arc rack 320 to disengage. It is also possible to avoid the center distance allowance λ between gear 310 and arc rack 320 being too small, which would make it difficult for gear 310 and arc rack 320 to automatically adapt to the tolerance changes and deformation between gear 310 and arc rack 320 during meshing transmission. This improves the transmission stability of gear 310 and arc rack 320, improves the stability and reliability of the rotation of the air duct assembly 200, and thus improves the air delivery efficiency of the fan head.

[0072] In some embodiments of this application, see Figure 2 and Figure 6 The central axis of gear 310 is located outside the air duct assembly 200 and is parallel to the rotation axis of the air duct assembly 200.

[0073] Specifically, the air duct assembly 200 includes an air duct shell 210, which has a rotating structure. The outer periphery of the air duct shell 210 forms an outer peripheral surface 201. An arc-shaped rack 320 is disposed in the middle of the outer peripheral surface 201 of the air duct shell 210. The central axis of the air duct shell 210 is the rotation axis of the air duct assembly 200.

[0074] Correspondingly, the gear 310 is located at the bottom of the arc-shaped rack 320, and the central axis of the gear 310 is parallel to and spaced apart from the central axis of the air duct housing 210.

[0075] This configuration allows the gear 310 and the arc-shaped rack 320 at the bottom of the air duct assembly 200 to bear the weight of the air duct assembly 200 relatively evenly, further improving the transmission stability of the gear 310 and the arc-shaped rack 320, improving the stability and reliability of the rotation of the air duct assembly 200, and thus improving the air delivery efficiency of the fan head.

[0076] In some embodiments of this application, see Figure 2and Figure 4 The air duct assembly 200 includes an air duct shell 210 and a fan wheel 220 rotatably disposed within the air duct shell 210. An air duct cavity 211 is formed inside the air duct shell 210. An air inlet 212 and an air outlet 213 are provided on the air duct shell 210. The air inlet 212 is connected to the air outlet 213 through the air duct cavity 211. An outer peripheral surface 201 is formed on the outer periphery of the air duct shell 210.

[0077] Specifically, the air duct shell 210 has air inlets 212 at opposite ends along its axial direction, and an air outlet 213 is provided on the outer peripheral surface 201 of the air duct shell 210. Both the air inlets 212 and the air outlets 213 can be constructed as grilles.

[0078] The air duct assembly 200 also includes a second drive component 230, and a second mounting groove 216 is provided on the air duct housing 210 (see Figure 8 The second drive component 230 is installed in the second mounting groove 216 to reduce the axial assembly space occupied by the second drive component 230 and improve the space utilization of the air duct housing 210. In order to seal the second mounting groove 216, a sealing cover plate (not shown in the figure) can be provided at the groove opening of the second mounting groove 216. The sealing cover plate covers the groove opening of the second mounting groove 216 and is detachably connected to the air duct housing 210.

[0079] The output end of the second driving component 230 is connected to the impeller 220 to drive the impeller 220 to rotate around its own axis within the air duct cavity 211, creating a low-pressure zone within the air duct cavity 211. Air enters the air duct cavity 211 from the air inlet 212 at the end of the air duct shell 210 and is then blown out from the air outlet 213 on the outer periphery of the air duct shell 210, thus achieving efficient air delivery from the air duct assembly 200. The impeller 220 can be a centrifugal impeller, and the second driving component 230 can be a rotary driving component such as a motor.

[0080] Further, see Figure 2 , Figure 4 and Figure 8 The air duct shell 210 includes a first shell 214 and a second shell 215, which are detachably joined together to form an air duct cavity 211.

[0081] Specifically, the first housing 214 and the second housing 215 are respectively provided with air inlets 212 at their opposite ends, and air outlets 213 are provided on the circumferential ring surface of the first housing 214 or the circumferential ring surface of the second housing 215, or the air outlets 213 are provided on the circumferential ring surface formed by the first housing 214 and the second housing 215.

[0082] The first housing 214 and the second housing 215 can be detachably connected and assembled through detachable structures such as plug-in structure, threaded connection structure, and snap-fit ​​connection structure, which facilitates the assembly and disassembly of structural components such as the wind turbine 220 and the second drive component 230.

[0083] Further, see Figure 8 A first flange 2141 is formed on the circumferential edge of the first housing 214 facing the second housing 215, and a second flange 2151 is formed on the circumferential edge of the second housing 215 facing the first housing 214. The first flange 2141 and the second flange 2151 are mated together.

[0084] Specifically, the first flange 2141 and the second flange 2151 can be detachably connected through detachable structures such as plug-in structures, threaded connection structures, and snap-fit ​​connection structures. The arc-shaped rack 320 is provided on the first flange 2141 or the second flange 2151.

[0085] By providing a first flange 2141 and a second flange 2151 on the first housing 214 and the second housing 215 respectively, the first flange 2141 and the second flange 2151 provide positioning for the docking connection of the first housing 214 and the second housing 215, thereby improving the assembly efficiency of the first housing 214 and the second housing 215. At the same time, the first flange 2141 and the second flange 2151 improve the structural strength of the first housing 214 and the second housing 215, reduce the probability of structural deformation of the first housing 214 and the second housing 215 after long-term use, and improve the overall structural stability of the air duct housing 210.

[0086] Further, see Figure 2 and Figure 4 The air duct assembly 200 also includes a bushing 240, and there are two support frames 100. Each support frame 100 has a shaft hole 110. The two opposite ends of the air duct shell 210 along the axial direction are respectively rotatably connected to the shaft holes 110 of the two support frames 100 through the bushing 240.

[0087] When the air duct assembly 200 is assembled and connected with the support frame 100, the relative positions of the air duct shell 210 and the support frame 100 can be fixed in advance, and then the bushing 240 can be inserted into the shaft hole 110 from the outside to the inside of the support frame 100, so as to realize the assembly and connection of the air duct assembly 200 and the support frame 100 as a whole.

[0088] The two opposite ends of the air duct housing 210 along the axial direction are respectively rotatably connected to the shaft holes 110 of the two support frames 100 through bushings 240, which can effectively improve the stability of the air duct assembly 200 rotating around its own axis and reduce the probability of the air duct assembly 200 shifting laterally along the axial direction.

[0089] In some embodiments of this application, see Figure 2 , Figure 4 and Figure 9 The support frame 100 includes a base frame 120 and two side frames 130 detachably connected to the base frame 120. The base frame 120 is located at the bottom of the air duct assembly 200, and a first mounting groove 121 for mounting the gear 310 is provided on the base frame 120. The two opposite ends of the air duct assembly 200 along the axial direction are respectively rotatably connected to the two side frames 130.

[0090] Specifically, the fan head also includes a housing 400, which includes two air inlet grilles 410 and one air outlet grille 420. The two air inlet grilles 410 respectively cover the air inlets 212 at both ends of the duct housing 210 and are detachably connected to the two side frames 130 respectively. The air outlet grille 420 covers the outer peripheral surface 201 of the duct housing 210 and is detachably connected to the two side frames 130. The first housing 214 and the second housing 215 constituting the duct housing 210 are rotatably connected to the two side frames 130 via bushings 240.

[0091] The air outlet grille 420, the two air inlet grilles 410, and the first mounting groove 121 of the base frame 120 surround to form a cover cavity 430. The air duct assembly 200 and the drive mechanism 300 are all housed in the cover cavity, improving the safety of the fan head in use.

[0092] In addition, the base frame 120 has a shell structure with an open top. A first mounting groove 121 is formed inside the base frame 120. The first drive member 330 and the gear 310 are both installed in the first mounting groove 121. While the first mounting groove 121 installs the gear 310, it also provides clearance for the meshing connection between the gear 310 and the arc-shaped rack 320.

[0093] This facilitates the quick disassembly and replacement of the fan head's air duct assembly 200, support frame 100, and drive mechanism 300, providing convenience for users' daily maintenance of the fan head.

[0094] In addition, this application also provides a fan, which includes the fan head of any of the above embodiments.

[0095] It is not difficult to understand that the fan in this embodiment of the application, because it is equipped with the aforementioned fan head, also has the same technical effect brought by the fan head. That is, through the cooperative arrangement of the support frame 100, the air duct assembly 200 and the drive mechanism 300, the drive mechanism 300 is set as a gear 310 and an arc rack 320 cooperative transmission structure, so that the drive mechanism 300 as a whole does not occupy the axial space of the fan head, effectively reducing the axial width of the fan head as a whole, and improving the overall space utilization of the fan head; the center distance L between the gear 310 and the arc rack 320, the diameter D1 of the gear 310 and the arc rack 320 are set as follows: The diameter D2 of the circle containing 0 is set to L > (D1 + D2) / 2, so that there is a small gap between the tip circle of gear 310 and the root circle of arc rack 320. Through the small gap between the tip circle of gear 310 and the root circle of arc rack 320, gear 310 and arc rack 320 automatically adapt to the tolerance changes and deformation between gear 310 and arc rack 320 during meshing transmission, so that gear 310 and arc rack 320 mesh smoothly, improve the transmission stability of gear 310 and arc rack 320, improve the stability and reliability of the rotation of air duct assembly 200, and thus improve the air delivery efficiency of fan head.

[0096] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fan head, characterized in that, include: Support frame; The air duct assembly is rotatably mounted on the support frame around its own axis, and the outer peripheral surface of the air duct assembly is circular. A drive mechanism is provided for driving the air duct assembly to rotate relative to the support frame. The drive mechanism includes an arc-shaped rack disposed on the outer peripheral surface and a gear rotatably disposed on the support frame. The extension direction of the arc-shaped rack is the same as the circumferential direction of the outer peripheral surface. The gear is located at the bottom of the air duct assembly and meshes with the arc-shaped rack. Wherein, the diameter D1 of the gear, the diameter D2 of the circle containing the arc rack, and the center distance L between the gear and the arc rack satisfy: L>(D1+D2) / 2.

2. The fan head according to claim 1, characterized in that, The diameter D1 of the gear, the diameter D2 of the circle containing the arc rack, and the center distance L between the gear and the arc rack satisfy: L-λ=(D1+D2) / 2, 0≤λ≤0.75mm.

3. The fan head according to claim 2, characterized in that, The module of the gear and the module of the arc rack are both M, and M and λ satisfy: (0.25*M-0.1)≤λ≤(0.25*M+0.1).

4. The fan head according to claim 1, characterized in that, The central axis of the gear is located outside the air duct assembly and is parallel to the rotation axis of the air duct assembly.

5. The fan head according to claim 1, characterized in that, The air duct assembly includes an air duct shell and a fan wheel rotatably disposed within the air duct shell. An air duct cavity is formed inside the air duct shell. An air inlet and an air outlet are provided on the air duct shell. The air inlet communicates with the air outlet through the air duct cavity. The outer periphery of the air duct shell forms the outer peripheral surface.

6. The fan head according to claim 5, characterized in that, The duct shell includes a first shell and a second shell, which are detachably joined together to form the duct cavity.

7. The fan head according to claim 6, characterized in that, The first housing has a first flange on its circumferential edge facing the second housing, and the second housing has a second flange on its circumferential edge facing the first housing. The first flange and the second flange are mated together.

8. The fan head according to claim 5, characterized in that, The air duct assembly also includes bushings, and there are two support frames, each of which has a shaft hole. The two opposite ends of the air duct shell along the axial direction are respectively rotatably connected to the shaft holes of the two support frames through bushings.

9. The fan head according to any one of claims 1 to 8, characterized in that, The support frame includes a base frame and two side frames detachably connected to the base frame. The base frame is located at the bottom of the air duct assembly, and a first mounting groove for mounting the gear is provided on the base frame. The two opposite ends of the air duct assembly along the axial direction are respectively rotatably connected to the two side frames.

10. A fan, characterized in that, Includes the fan head as described in any one of claims 1 to 9.

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