Machine head assembly and air supply device

Abstract

The utility model relates to a machine head assembly and an air supply device, and relates to the technical field of air supply. The machine head assembly comprises a supporting part and a working part, the supporting part comprises a supporting frame, the supporting frame comprises a datum plane, and the datum plane is provided with a circle center A and an axis L1 penetrating through the circle center A; the working part comprises a shell, the shell is movably connected with the supporting frame and provided with an axis L2, the axis L2 and the axis L1 intersect at a point o, the point o and the circle center A do not coincide, and the working part can be controlled to do conical rotation along the axis L1 with the point o as the vertex and the axis L2 as the generatrix. The stability of the gravity center of the machine head assembly can be guaranteed, generation of alternating stress is effectively reduced, and the service life of the whole machine is prolonged.

Description

Technical Field

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

[0002] Circulating fans, as a common household appliance, are widely used in homes, offices, and public places to improve indoor air circulation and enhance comfort. However, during the oscillation process, existing circulating fans generate alternating stress due to the change in the center of gravity of the fan head. The long-term effect of alternating stress can cause material fatigue in the oscillation components, thereby reducing the reliability and lifespan of the components. Utility Model Content

[0003] Therefore, it is necessary to provide a fan head assembly and air supply device to address the issue of changes in the center of gravity of the circulating fan head.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, embodiments of this application provide a nose cone assembly, including:

[0006] A support portion includes a support frame, the support frame including a reference surface, the reference surface having a center A and an axis L1 passing through the center A;

[0007] The working unit includes a housing, which is movably connected to the support frame and has an axis L2. The axis L2 intersects the axis L1 at point o. The point o does not coincide with the center A of the circle. The working unit can be controlled to rotate in a conical shape along the axis L1 with the point o as the vertex and the axis L2 as the generatrix.

[0008] Through the above design, the center of gravity of the working unit always falls on point O during the shaking process, which improves the problem of center of gravity change in related technologies, thereby reducing alternating stress during operation, improving the reliability and service life of the working unit, and thus reducing maintenance costs and improving user experience.

[0009] In one embodiment of the first aspect, the angle between the axis L2 and the axis L1 is θ, and satisfies: 10°≤θ≤30°.

[0010] The above design limits the rotation range of the working unit to ensure the stability of its center of gravity, avoid instability caused by excessive angles, and reduce the working unit's wear and tear.

[0011] In one embodiment of the first aspect, the working part further includes a connecting ring, which is sleeved on the outside of the housing and includes a first connecting end and a second connecting end disposed opposite to each other. The first connecting end and the second connecting end are rotatably connected to two opposite sides of the housing, and the first connecting end and the second connecting end are connected on the same straight line L3, which intersects the axis L2 at point o.

[0012] Through the above design, the working unit can swing left and right along the straight line L3, and further ensure the stability of the center of gravity of the working unit.

[0013] In one embodiment of the first aspect, the connecting ring further includes a third connecting end and a fourth connecting end disposed opposite to each other, and the support frame includes a fifth connecting end and a sixth connecting end disposed opposite to each other, the fifth connecting end being rotatably connected to the third connecting end, and the sixth connecting end being rotatably connected to the fourth connecting end;

[0014] The third connecting end and the fourth connecting end are connected on the same straight line L4, which is perpendicular to the straight line L3 and intersects at point o.

[0015] With the above design, the working unit can swing up and down along the straight line L4, and ensure the stability of the center of gravity of the working unit.

[0016] In one embodiment of the first aspect, the distance between the first connecting end and the second connecting end is D1, and the distance between the third connecting end and the fourth connecting end is D2, satisfying: 100mm≤D1≤200mm, 100mm≤D2≤200mm.

[0017] The above design ensures that the range of motion of the outer shell in all directions is similar during the shaking process, further ensuring the stability of the center of gravity of the working part.

[0018] In one embodiment of the first aspect, the housing includes a first end face and a second end face disposed opposite to each other, the distance between point o and the first end face is D3, the distance between point o and the second end face is D4, and satisfies: 50mm≤D3≤80mm, 50mm≤D4≤80mm.

[0019] The above design limits the installation capacity of the housing, and D3 and D4 can be the same or keep close to each other, thereby ensuring that the length and weight of the two ends of the housing remain close, and further ensuring the stability of the center of gravity of the working part during the shaking process.

[0020] In one embodiment of the first aspect, the distance between point o and the center A of the circle is D5, and satisfies: 100mm≤D5≤200mm.

[0021] The above design ensures the connection distance between the outer shell and the support, thereby ensuring the swing range of the working part relative to the support frame and avoiding the phenomenon that the working part is prone to shaking and unstable head-shaking operation when the distance is too long.

[0022] In one embodiment of the first aspect, the support further includes a rotating plate rotatably connected to the center A of the reference surface, so as to be controllably rotated along the axis L1;

[0023] The working unit also includes a driving component and a first transmission shaft. The driving component is fixedly installed inside the housing. The first transmission shaft is coaxially arranged with the driving component and one end is connected to the output shaft of the driving component. The other end passes through the housing and is anti-rotationally connected to point B of the rotating plate. Point B is not on the axis L1.

[0024] With the above design, when the drive unit is fixed inside the housing, the entire housing will follow the rotation of the first drive shaft and the rotating plate, and perform a conical rotation operation along the axis L1, thereby realizing the multi-directional oscillating air sweeping of the working part.

[0025] In one embodiment of the first aspect, the working part further includes a fan blade and a second drive shaft, one end of the second drive shaft being connected to the end of the drive member facing away from the first drive shaft, and the other end being connected to the fan blade.

[0026] Through the above design, the air supply of the fan blade and the multi-directional oscillation of the working part can be realized by using only a single drive component. The overall structure is simplified, efficient, and effectively reduces the production cost of the whole machine.

[0027] Secondly, this application also provides an air supply device, including the head assembly described in any of the above embodiments.

[0028] Through the above design, the air supply device can perform multi-directional oscillating air sweeping operation while maintaining the center of gravity, thereby improving the service life of the entire machine.

[0029] Compared to related technologies, the beneficial effects of this application are as follows: This application provides a head assembly and an air supply device that can maintain the relative stability of the head assembly's center of gravity. The head assembly includes a support section and a working section. The working section is mounted on the support section and rotates in a conical shape along the axis L1 of the support section with its own axis L2 as the generatrix. In this way, during the head assembly's oscillating airflow process, the center of gravity of the head assembly always falls on the axis L2, ensuring the stability of the head assembly's center of gravity, effectively reducing the generation of alternating stress, and improving the service life of the entire machine. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an isometric structural diagram of the head assembly in some embodiments of this application;

[0032] Figure 2 This is a schematic cross-sectional view of the nose assembly in some embodiments of this application. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the support frame structure in some embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the connecting ring structure in some embodiments of this application;

[0035] Figure 5 This is a schematic cross-sectional view of the nose assembly in some embodiments of this application. Figure 2 ;

[0036] Figure 6 This is a schematic cross-sectional view of the nose assembly in some embodiments of this application. Figure 3 ;

[0037] Figure 7 This is a schematic cross-sectional view of the nose assembly in some embodiments of this application. Figure 4 ;

[0038] Figure 8 This is a schematic diagram of the structure of the rotating plate in some embodiments of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Head assembly; 110. Support section; 111. Support frame; 1111. Fifth connecting end; 1112. Sixth connecting end; 1113. Reference surface; 112. Rotating plate; 120. Working section; 121. Housing; 1211. First end face; 1212. Second end face; 122. Connecting ring; 1221. First connecting end; 1222. Second connecting end; 1223. Third connecting end; 1224. Fourth connecting end; 123. First drive shaft; 124. Drive component; 125. Second drive shaft; 126. Fan blade; 127. Gearbox. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] 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.

[0043] Furthermore, where the term "and / or" appears, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In related technologies, during the oscillation process of a circulating fan, the change in the center of gravity of the fan head causes alternating stress. Alternating stress, as we understand it, refers to the stress experienced by a material during repeated loading and unloading. This stress gradually accumulates, leading to material fatigue and damage. Therefore, the long-term effect of alternating stress can cause material fatigue in the oscillation components, thereby reducing their reliability and lifespan. This not only affects the overall performance of the circulating fan but also increases the failure rate and reduces user satisfaction. Furthermore, as the reliability of the oscillation components decreases, the circulating fan may experience various malfunctions after a period of use, requiring frequent repairs and component replacements, increasing user maintenance costs and impacting the product's market competitiveness.

[0048] See Figure 1 As shown, to improve the above-mentioned problems, embodiments of this application provide a head assembly 100 to maintain the stability of the center of gravity of the head assembly 100 during the oscillation process and reduce the generation of alternating stress. It should be noted that, for ease of understanding, embodiments of this application apply the head assembly 100 to an air supply device product for illustrative purposes; however, the head assembly 100 is not limited to applications in air supply devices, and other devices requiring oscillation can also use the head assembly 100 provided in embodiments of this application.

[0049] Continue reading Figure 2 and Figure 3As shown, specifically, the head assembly 100 includes a support part 110 and an operating part 120. The support part 110 is used to provide support to the operating part 120. The operating part 120 is mounted on the support part 110 and can swing in multiple directions relative to the support part 110 to meet the user's multi-directional air supply needs.

[0050] Furthermore, the support unit 110 includes a support frame 111, which includes a reference surface 1113. The reference surface 1113 has a center A and an axis L1 passing through the center A. The operating unit 120 includes a housing 121, which is movably connected to the support frame 111 and has an axis L2. The axis L2 intersects the axis L1 at point o, which does not coincide with the center A. The operating unit 120 can be controlled to rotate in a conical shape along the axis L1 with point o as the vertex and the axis L2 as the generatrix.

[0051] Specifically, the operating unit 120 is movably mounted on the support frame 111, enabling it to oscillate and sweep relative to the support frame 111. The reference surface 1113 is circular, with its center A forming an axis L1 perpendicular to the reference surface 1113. This axis limits the operating unit 120 to rotate only around the operating unit 120, keeping its center of gravity on the axis L1. The outer shell 121 of the operating unit 120 has a cylindrical structure, and its axis L2 is not parallel to the axis L1, intersecting it at point O. Thus, when the operating unit 120 is in drive mode, it is controlled to rotate in a conical motion around point O as its apex and axis L2 as its generatrix, along axis L1, achieving multi-directional sweeping in all directions (up, down, left, and right). Simultaneously, during the oscillation process, the center of gravity of the operating unit 120 remains at point O, improving the problem of center of gravity shift in related technologies. This reduces alternating stress during operation, improves the reliability and service life of the operating unit 120, thereby reducing maintenance costs and enhancing the user experience.

[0052] Furthermore, the angle between axis L2 and axis L1 is θ, and satisfies: 10°≤θ≤30°.

[0053] For example, the angle θ between axis L2 and axis L1 can be 10°, 12°, 13°, 15°, 16°, 19°, 20°, 22°, 23°, 25°, 27°, 29°, 30°, etc., and can be reasonably selected according to actual needs and the overall design dimensions of the machine. No specific limitation is made here. By setting the above angle, the rotation range of the working unit 120 is limited to ensure the stability of the center of gravity of the working unit 120, avoiding instability caused by excessive angles and reducing operational wear and tear on the working unit 120. At the same time, it ensures that the oscillating and sweeping range of the working unit 120 is within the user's comfortable experience area, improving the user experience.

[0054] Continue reading Figure 4As shown, in some embodiments, the working unit 120 further includes a connecting ring 122, which is sleeved on the outside of the housing 121 and includes a first connecting end 1221 and a second connecting end 1222 disposed opposite to each other. The first connecting end 1221 and the second connecting end 1222 are rotatably connected to two opposite sides of the housing 121, and the first connecting end 1221 and the second connecting end 1222 are connected on the same straight line L3, which intersects the axis L2 at point o.

[0055] Specifically, the first connecting end 1221 and the second connecting end 1222 are coaxially arranged with the straight line L3 as the axis, and the first connecting end 1221 and the second connecting end 1222 are located on the upper and lower sides of the outer casing 121, respectively. Thus, when the first connecting end 1221 and the second connecting end 1222 rotate with the opposite sides of the outer casing 121, the operating unit 120 can swing left and right along the straight line L3. Simultaneously, by comparing the straight line L3 with the axis L2 at point o, the stability of the center of gravity of the operating unit 120 is further ensured.

[0056] For example, the outer casing 121 has mounting holes corresponding to the first connecting end 1221 and the second connecting end 1222. The first connecting end 1221 and the second connecting end 1222 can be rotatably mounted at the holes of the outer casing 121 through the cooperation of a pin and a snap ring, so as to realize the rotational cooperation between the outer casing 121 and the connecting ring 122.

[0057] In other embodiments, the first connecting end 1221 and the second connecting end 1222 may also be configured as ball head structures so that after being assembled with the housing 121, the housing 121 can be rotated in multiple directions to satisfy the multi-directional oscillating air blowing of the working part 120.

[0058] Furthermore, the connecting ring 122 also includes a third connecting end 1223 and a fourth connecting end 1224 disposed opposite to each other, and the support frame 111 includes a fifth connecting end 1111 and a sixth connecting end 1112 disposed opposite to each other. The fifth connecting end 1111 is rotatably connected to the third connecting end 1223, and the sixth connecting end 1112 is rotatably connected to the fourth connecting end 1224. The third connecting end 1223 and the fourth connecting end 1224 are connected on the same straight line L4, and the straight line L4 is perpendicular to the straight line L3 and intersects at point O.

[0059] Specifically, the third connecting end 1223, the fourth connecting end 1224, the fifth connecting end 1111, and the sixth connecting end 1112 are all coaxially arranged with straight line L4 as the axis. The third connecting end 1223 and the fifth connecting end 1111 are located on the left side of the outer casing 121, and the fourth connecting end 1224 and the sixth connecting end 1112 are located on the right side of the outer casing 121. Thus, through the rotational engagement of the fifth connecting end 1111 with the third connecting end 1223, and the rotational engagement of the sixth connecting end 1112 with the fourth connecting end 1224, the working part 120 can swing up and down along straight line L4. At the same time, the fact that straight line L4 is perpendicular to straight line L3 and intersects at point O further ensures the stability of the center of gravity of the working part 120. Similarly, the connecting ring 122 and the support frame 111 can be assembled with bolts, pins, and other components to achieve rotational engagement between the two, which will not be elaborated further here.

[0060] Of course, in some specific embodiments, due to issues such as process, assembly, and product dimensions, the intersection of straight lines L4 and L3 may not be located at point o. Even when the distance between the intersection of straight lines L4 and L3 and point o is small, the center of gravity of the working unit 120 can still be confined to a local area, ensuring the operational stability of the working unit 120. Preferably, the intersection of straight lines L4 and L3 falls on point o, and the center of gravity of the working unit 120 also falls on point o, resulting in optimal overall machine stability.

[0061] Continue reading Figure 5 and Figure 6 As shown, in some embodiments, the distance between the first connecting end 1221 and the second connecting end 1222 is D1, and the distance between the third connecting end 1223 and the fourth connecting end 1224 is D2, satisfying: 100mm≤D1≤200mm, 100mm≤D2≤200mm.

[0062] For example, the distance D1 between the first connecting end 1221 and the second connecting end 1222 can be 100mm, 110mm, 120mm, 130mm, 130mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, etc., and the distance D2 between the third connecting end 1223 and the fourth connecting end 1224 can also be 100mm, 110mm, 120mm, 130mm, 130mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, etc., which can be reasonably selected according to the product design and are not specifically limited here. D1 and D2 can be the same or keep close to each other, thereby ensuring that the range of motion of the outer casing 121 in each direction tends to be the same during the shaking process, and further ensuring the stability of the center of gravity of the working part 120.

[0063] Furthermore, the outer casing 121 includes a first end face 1211 and a second end face 1212 disposed opposite to each other. The distance between point o and the first end face 1211 is D3, and the distance between point o and the second end face 1212 is D4, satisfying: 50mm≤D3≤80mm, 50mm≤D4≤80mm.

[0064] For example, the distance D3 between point o and the first end face 1211 can be 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, etc., and the distance D4 between point o and the second end face 1212 can also be 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, etc. The specific distance can be reasonably selected according to the product design, and no specific limitation is made here. By setting the above distance, the installation capacity of the outer shell 121 is limited, and D3 and D4 can be the same or keep close, thereby ensuring that the length and weight of the two ends of the outer shell 121 remain close, further ensuring the stability of the center of gravity of the working part 120 during the oscillation process.

[0065] Furthermore, the distance between point o and the center A is D5, and satisfies: 100mm≤D5≤200mm.

[0066] For example, the distance D5 between point o and the center A can be 100mm, 110mm, 120mm, 130mm, 130mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, etc., and can be reasonably selected according to the product design. No specific limitation is made here. By setting the above values, the connection distance between the outer shell 121 and the support 110 is ensured, thereby ensuring the swing range of the working part 120 relative to the support frame 111, and avoiding the phenomenon of the working part 120 easily shaking and unstable head-shaking operation when the distance is too long.

[0067] Continue reading Figure 7 and Figure 8 As shown, in one specific embodiment, the support 110 further includes a rotating plate 112, which is rotatably connected to the center A of the reference plane 1113 so as to be controllably rotated along the axis L1. The working part 120 further includes a driving member 124 and a first transmission shaft 123. The driving member 124 is fixedly disposed inside the housing 121. The first transmission shaft 123 is coaxially disposed with the driving member 124, with one end connected to the output shaft of the driving member 124, and the other end passing through the housing 121 and anti-rotationally connected to point B of the rotating plate 112. Point B is not on the axis L1.

[0068] Specifically, the rotating plate 112 can be rotatably mounted at the center A of the reference surface 1113 via bolts or pins, allowing it to rotate around the center A. The driving component 124 can be a rotary motor to drive the first transmission shaft 123 to rotate when energized. The first transmission shaft 123 and the driving component 124 share the same axis L2, and the end of the first transmission shaft 123 away from the driving component 124 is engaged with point B of the rotating plate 112 to prevent rotation. Thus, when the driving component 124 drives the first transmission shaft 123 to rotate, the first transmission shaft 123 cannot rotate relative to the rotating plate 112, but can only drive the rotating plate 112 to rotate along the axis L1. In this way, with the driving component 124 fixed inside the housing 121, the entire housing 121 will follow the rotation of the first transmission shaft 123 and the rotating plate 112, performing a conical rotation operation along the axis L1, realizing the multi-directional oscillating air sweeping of the working part 120.

[0069] Understandably, point B is only used as a descriptive term. In practice, it can also be interpreted as a region, i.e., the first transmission shaft 123 is connected to this region. Since point B does not coincide with the center A, the rotating plate 112 forms a cam-like structure, and the first rotating shaft performs a conical rotational motion.

[0070] Of course, in other embodiments, the conical rotational motion of the working unit 120 can also be achieved by other structures, such as controlling the sweeping motion in different directions by multiple motors. Specific structures will not be listed here, as long as the center of gravity of the working unit 120 in this application is stable.

[0071] Furthermore, the operating unit 120 also includes a fan blade 126 and a second drive shaft 125. One end of the second drive shaft 125 is connected to the end of the drive member 124 facing away from the first drive shaft 123, and the other end is connected to the fan blade 126.

[0072] Specifically, the second drive shaft 125 shares the same axis L2 as the drive member 124 and is located at the end of the drive member 124 facing away from the first drive shaft 123. The second drive shaft 125 is connected to the drive shaft of the drive member 124, and thus rotates under the drive of the drive member 124, thereby driving the fan blade 126 to rotate and supply air to the user. In this way, air supply to the fan blade 126 and multi-directional oscillation of the working part 120 can be achieved with only a single drive member 124, resulting in a simplified overall structure, high efficiency, and effective reduction of the overall production cost of the machine.

[0073] In other embodiments, only the first drive shaft 123 may be provided, and the first drive shaft 123 may pass through both ends of the drive member 124, so that the two ends of the first drive shaft 123 are respectively connected to the rotating plate 112 and the fan blade 126. In this way, the first drive rod is rotated by the drive member 124, thereby realizing the rotation of the fan blade 126 and the oscillation operation of the working part 120.

[0074] In some embodiments, the working unit 120 further includes a gearbox 127, which is mounted on the side of the drive member 124 where the first drive shaft 123 is located, and is connected to the drive member 124 and the first drive shaft 123 respectively.

[0075] Specifically, the gearbox 127 is equipped with a gear set structure, which is connected to the drive component 124 and the first drive shaft 123 respectively, thereby adjusting the rotational speed of the first drive shaft 123, thereby limiting the swaying rate of the working part 120, reducing the wear of the first drive shaft 123, and improving the service life of the whole machine.

[0076] Embodiments of this application also provide an air supply device, including the head assembly 100 and the body assembly in any of the above embodiments.

[0077] For example, the air supply device may be a circulating fan, and the head assembly 100 is mounted on the body assembly. The body assembly may include multiple telescopically adjustable support rods to adjust the working height of the head assembly 100.

[0078] This embodiment includes the head assembly 100 of any of the above embodiments, and therefore has all the beneficial effects of the head assembly 100 of any of the above embodiments, which will not be described in detail here.

[0079] 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.

[0080] 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 head assembly, characterized in that, include: A support portion includes a support frame, the support frame including a reference surface, the reference surface having a center A and an axis L1 passing through the center A; The working unit includes a housing, which is movably connected to the support frame and has an axis L2. The axis L2 intersects the axis L1 at point o. The point o does not coincide with the center A of the circle. The working unit can be controlled to rotate in a conical shape along the axis L1 with the point o as the vertex and the axis L2 as the generatrix.

2. The head assembly according to claim 1, characterized in that, The angle between axis L2 and axis L1 is θ, and satisfies: 10°≤θ≤30°.

3. The head assembly according to claim 1, characterized in that, The working part further includes a connecting ring, which is sleeved on the outside of the outer shell and includes a first connecting end and a second connecting end arranged opposite to each other. The first connecting end and the second connecting end are rotatably connected to two opposite sides of the outer shell, and the first connecting end and the second connecting end are connected on the same straight line L3. The straight line L3 intersects the axis L2 at point o.

4. The head assembly according to claim 3, characterized in that, The connecting ring further includes a third connecting end and a fourth connecting end arranged opposite to each other, and the support frame includes a fifth connecting end and a sixth connecting end arranged opposite to each other. The fifth connecting end is rotatably connected to the third connecting end, and the sixth connecting end is rotatably connected to the fourth connecting end. The third connecting end and the fourth connecting end are connected on the same straight line L4, which is perpendicular to the straight line L3 and intersects at point o.

5. The head assembly according to claim 4, characterized in that, The distance between the first connecting end and the second connecting end is D1, and the distance between the third connecting end and the fourth connecting end is D2, satisfying: 100mm≤D1≤200mm, 100mm≤D2≤200mm.

6. The head assembly according to claim 1, characterized in that, The outer shell includes a first end face and a second end face that are disposed opposite to each other. The distance between point o and the first end face is D3, and the distance between point o and the second end face is D4, satisfying: 50mm≤D3≤80mm, 50mm≤D4≤80mm.

7. The head assembly according to claim 1, characterized in that, The distance between point o and the center A of the circle is D5, and satisfies: 100mm≤D5≤200mm.

8. The head assembly according to claim 1, characterized in that, The support also includes a rotating plate, which is rotatably connected to the center A of the reference surface so that it can be controlled to rotate along the axis L1. The working unit also includes a driving component and a first transmission shaft. The driving component is fixedly installed inside the housing. The first transmission shaft is coaxially arranged with the driving component and one end is connected to the output shaft of the driving component. The other end passes through the housing and is anti-rotationally connected to point B of the rotating plate. Point B is not on the axis L1.

9. The head assembly according to claim 8, characterized in that, The working unit also includes a fan blade and a second drive shaft. One end of the second drive shaft is connected to the end of the drive member facing away from the first drive shaft, and the other end is connected to the fan blade.

10. An air supply device, characterized in that, Includes the nose assembly as described in any one of claims 1 to 9.

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