Fan head assembly and electric fan

Abstract

The present invention relates to a fan head assembly and an electric fan, wherein the fan head assembly includes a connector, a main motor, and a cover. The connector is provided with a support tube for supporting the main motor, a shaft sleeve is inserted into the support tube, a support shaft of the main motor is inserted into the shaft sleeve, and the support shaft and the shaft sleeve are fixed relative to each other in the axial direction of the shaft sleeve. The shaft sleeve is provided with a limiter, and the limiter is matched with the support tube in a concave-convex manner to limit the movement of the shaft sleeve relative to the support tube in the axial direction of the support tube. The cover is connected to the main motor, and at least a portion of the cover corresponds to the concave-convex matching portion of the limiter and the support tube to prevent the limiter from detaching from the support tube. This allows the support shaft to be stably and reliably supported on the connector.

Description

Technical Field

[0001] The present invention relates to the technical field of fan parts, in particular to a fan head assembly and an electric fan. Background Art

[0002] The blades of the electric fan are mounted on the main shaft of the main motor, which is supported on a connector. The main motor can rotate relative to the connector, causing the blades to swing relative to the connector, changing the direction of the airflow from the electric fan. The main motor is generally supported on the connector by a support shaft, and the axis of rotation of the main motor is the axis of the support shaft. If the support shaft cannot be stably supported on the connector, the shaking effect of the electric fan will be poor. Based on this, it is particularly important to ensure that the support shaft on the main motor is stably and reliably supported on the connector. Summary of the Invention

[0003] Aiming at the problem that the main motor of an electric fan cannot be stably and reliably supported on a connecting head, the present invention proposes a fan head assembly and an electric fan to ensure that the main motor can be stably and reliably supported on the connecting head.

[0004] A fan head assembly includes a connecting head, a main motor and a cover shell, wherein the connecting head is provided with a support tube for supporting the main motor, a shaft sleeve is inserted in the support tube, a support shaft of the main motor is inserted in the shaft sleeve, and the support shaft and the shaft sleeve are fixed in relative position in the axial direction of the shaft sleeve, a limit piece is provided on the shaft sleeve, and the limit piece is matched with the support tube in a concave and convex manner, and is used to limit the movement of the shaft sleeve relative to the support tube in the axial direction of the support tube, the cover shell is connected to the main motor, and the cover shell at least partially corresponds to the portion where the limit piece and the support tube are matched in a concave and convex manner, and is used to prevent the limit piece from separating from the support tube.

[0005] The above scheme provides a fan head assembly, in which the support shaft of the main motor is fixed relative to the shaft sleeve in the axial direction of the shaft sleeve, and the limiting function of the cover shell makes the concave-convex matching relationship between the limiting part and the support tube more reliable, so that the support shaft can be stably and reliably supported on the connecting head.

[0006] In one embodiment, the limiting member includes an outer wall arranged outside the sleeve, the outer wall is sleeved outside the support tube, the outer wall and the support tube are matched with each other in a concave-convex manner, and the cover shell is at least partially limited to the outside of the outer wall.

[0007] In one embodiment, a bayonet is provided on the outer wall, and a snap protrusion is provided at a position corresponding to the bayonet on the support tube, and the snap protrusion is clamped in the bayonet. The portion on the cover shell used for limiting is a blocking portion, and the blocking portion is located outside the outer wall. The distance between the blocking portion and the outer wall is smaller than the depth of the snap protrusion clamped in the bayonet.

[0008] In one embodiment, there are two bayonet holes. When the swing angle of the main motor relative to the connector is zero, the fan blades on the main shaft of the main motor are located in front of the connector, and the two bayonet holes are respectively located on the front and rear sides of the support tube.

[0009] In one embodiment, the blocking portion is provided with a limiting rib, and the surface of the limiting rib facing the outer wall is an arc-shaped concave surface, and the distance between the arc-shaped concave surface and the outer wall is smaller than the depth of the snap protrusion inserted into the snap hole.

[0010] In one embodiment, a connecting rod is further included, wherein the connecting head is provided with a support column for supporting the connecting rod, the connecting rod is provided with a blind hole, the support column is inserted into the blind hole, so that the connecting rod can rotate relative to the connecting head with the axis of the support column as the rotating axis, and the bushing is provided with a cantilever, and the cantilever is limited on the side of the connecting rod away from the support column, for limiting the support column in the blind hole.

[0011] In one embodiment, a swing motor is further included, wherein a crank of the swing motor is rotatably connected to the connecting rod, and the swing motor and the main motor are relatively fixed in the swing direction.

[0012] In one embodiment, the opening of the blind hole is located on the bottom surface of the connecting rod, the portion of the cantilever that is positioned above the connecting rod is a limiting portion, the limiting portion is located in the axial direction of the support column, and the limiting portion contacts the top surface of the connecting rod;

[0013] Alternatively, the opening of the blind hole is located on the bottom surface of the connecting rod, the part of the cantilever that is upper-limited on the connecting rod is a limiting portion, the limiting portion is located in the axial direction of the support column, the limiting portion is spaced apart from the top surface of the connecting rod, and the distance between the limiting portion and the connecting rod is less than the depth of the support column inserted into the blind hole.

[0014] In one embodiment, the cantilever is a plate-like structure, the plane where the plate-like structure is located is perpendicular to the axis of the support column, a plurality of auxiliary holes are provided on the cantilever, and a plurality of mutually staggered ribs are formed on the cantilever, and the auxiliary holes are arranged along the axial direction of the support column and pass through the cantilever.

[0015] In one embodiment, a groove is provided on the end surface of the support column inserted into the blind hole.

[0016] In one embodiment, the plane on which the connecting rod rotates relative to the support column is a reference plane, the axis of the support column is perpendicular to the reference plane, and the axis of the support column is parallel to the axis of the support tube.

[0017] An electric fan comprises the fan head assembly described in any one of the above items.

[0018] The above solution provides an electric fan, which ensures that the main motor in the electric fan can be reliably and stably supported on the connecting head by adopting the fan head assembly described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a cross-sectional view of the fan head assembly according to this embodiment;

[0022] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0023] Figure 3 This is an exploded view of the fan head assembly described in this embodiment;

[0024] Figure 4 Schematic diagram of the structure of the cover shell of this embodiment;

[0025] Figure 5 Schematic diagram of the structure of the connector according to this embodiment;

[0026] Figure 6 Schematic diagram of the structure of the connecting rod according to this embodiment;

[0027] Figure 7 Schematic diagram of the structure of the shaft sleeve described in this embodiment.

[0028] Description of reference numerals:

[0029] 10. Fan head assembly; 11. Connector; 111. Support tube; 1111. Snap-fit protrusion; 112. Support column; 1121. Groove; 12. Main motor; 121. Support shaft; 1211. Annular groove; 122. Main shaft; 13. Bushing; 131. Limiting piece; 1311. Bayonet; 132. Limiting protrusion; 133. Notch; 134. Elastic petal; 135. Cantilever; 1351. Auxiliary hole; 14. Cover; 141. Blocking part; 1411. Limiting rib; 1412. Arc-shaped inner concave surface; 142. Through hole; 15. Connecting rod; 151. Blind hole; 152. Through hole; 153. Bottom surface; 16. Swing motor; 161. Crank. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figure 1 and Figure 3 As shown, in one embodiment, a fan head assembly 10 is provided, comprising a connector 11 and a main motor 12. Figure 1 、 Figure 3 and Figure 5 As shown, the connector 11 is provided with a support cylinder 111 for supporting the main motor 12. A sleeve 13 is inserted into the support cylinder 111, and the support shaft 121 of the main motor 12 is inserted into the sleeve 13. In the axial direction of the sleeve 13, the support shaft 121 and the sleeve 13 are fixed relative to each other. A limiter 131 is provided on the sleeve 13, and the limiter 131 is matched with the support cylinder 111 in a concave-convex manner to limit the movement of the sleeve 13 relative to the support cylinder 111 in the axial direction of the support cylinder 111. In this way, the main motor 12 is relatively fixed relative to the connector 11 in the axial direction of the support cylinder 111.

[0032] Furthermore, if Figures 1 to 3As shown, the fan head assembly 10 further includes a cover 14, which is connected to the main motor 12. At least a portion of the cover 14 corresponds to the concave-convex fitting portion of the stopper 131 and the support cylinder 111, and is used to prevent the stopper 131 from separating from the support cylinder 111. The stopper 131 and the support cylinder 111 are always in a concave-convex fitting relationship, thereby ensuring that the shaft sleeve 13 is relatively fixed relative to the support cylinder 111 in the axial direction of the support cylinder 111, thereby ensuring that the support shaft 121 can be stably and reliably supported on the connector 11.

[0033] Specifically, if Figure 3 As shown, in one embodiment, the support shaft 121 is snap-fitted to the sleeve 13 to limit the movement of the support shaft 121 relative to the sleeve 13 in the axial direction of the sleeve 13. Figure 7 As shown, the inner circumference of the sleeve 13 is provided with a limiting protrusion 132, as shown in FIG. Figure 3 As shown, the outer circumferential surface of the support shaft 121 is provided with an annular groove 1211, and the limiting protrusion 132 is located in the annular groove 1211, so that the support shaft 121 cannot move axially relative to the sleeve 13. However, the limiting protrusion 132 can slide in the annular groove 1211 along the circumference of the annular groove 1211. In other words, the main motor 12 can rotate about the axis of the support shaft 121, realizing the oscillating function of the electric fan.

[0034] More specifically, Figure 7 As shown, in one embodiment, the end of the sleeve 13 that is first inserted into the support tube 111 is provided with a plurality of notches 133. The plurality of notches 133 are spaced apart along the circumference of the sleeve 13, thereby dividing the end of the sleeve 13 into a plurality of elastic petals 134. Each of the elastic petals 134 is provided with the limiting protrusion 132.

[0035] During the assembly process, the support shaft 121 is first inserted into the shaft sleeve 13. The elastic petal 134 is pressed outward by the support shaft 121 until the limiting protrusion 132 is opposite to the annular groove 1211. The elastic petal 134 elastically resets and locks the limiting protrusion 132 in the annular groove 1211. The shaft sleeve 13 is then inserted into the support tube 111. Under the limiting action of the support tube 111, the elastic petal 134 cannot elastically deform outward, thereby making the limiting between the support shaft 121 and the shaft sleeve 13 more reliable.

[0036] More specifically, in one embodiment, when the swing angle of the main motor 12 relative to the connector 11 is zero, the fan blades on the main shaft 122 of the main motor 12 are located in front of the connector 11, and the fan blades are located in front of the support tube 111. Figure 1 and Figure 2 As shown, the position where the limiting member 131 and the supporting tube 111 are matched with each other is located in front of the supporting tube 111. This makes it easier for the cover 14 connected to the main motor 12 to limit the position of the matching concave and convex parts.

[0037] Furthermore, in one embodiment, Figures 1 to 3 as well as Figure 7 As shown, the limiting member 131 includes a peripheral wall disposed outside the shaft sleeve 13, the peripheral wall being sleeved outside the support tube 111, the peripheral wall and the support tube 111 being fitted in a concave-convex manner, and the cover 14 being at least partially limited on the outside of the peripheral wall. The cover 14 can prevent the peripheral wall from deforming outward, thereby preventing the peripheral wall from separating from the support tube 111. The peripheral wall is located between the cover 14 and the support tube 111, and both the inner and outer sides of the peripheral wall are restricted, so that the concave-convex fitting relationship between the peripheral wall and the support tube 111 will not be released unless the cover 14 is removed.

[0038] More specifically, in one embodiment, Figure 7 As shown, a bayonet 1311 is provided on the outer wall. Figure 5 As shown, a snap-fit protrusion 1111 is provided on the support tube 111 at a position corresponding to the bayonet 1311. Figures 1 to 3 As shown, the buckle protrusion 1111 is locked in the bayonet 1311. Figure 4 As shown, the portion on the cover 14 used for limiting is the blocking portion 141. Figure 2 As shown, the blocking portion 141 is located outside the peripheral wall, and the distance L1 between the blocking portion 141 and the peripheral wall is less than the depth L2 of the locking protrusion 1111 in the locking notch 1311. Therefore, even if the peripheral wall deforms outward, the deformation is not sufficient to cause the locking protrusion 1111 to disengage from the locking notch 1311, thereby ensuring that the locking notch 1311 and the locking protrusion 1111 are securely engaged.

[0039] More specifically, in one embodiment, Figure 1 As shown, there are two bayonet holes 1311, which are located at the front and rear sides of the support tube 111 respectively. Figure 5As shown, there are also two snap protrusions 1111 corresponding to the bayonet 1311 , and the two snap protrusions 1111 are respectively located at the front side and the rear side of the support tube 111 .

[0040] In general, if Figures 1 to 3 As shown, the end surface through which the main shaft 122 of the main motor 12 is extended is the front end surface of the main motor 12, and the cover 14 is connected to the front end surface of the main motor 12. The cover 14 is located in front of the support tube 111. The two bayonet holes 1311 are respectively arranged at the front and rear sides of the support tube 111, which can make it easier for the cover 14 to limit it.

[0041] Specifically, if Figure 4 As shown, the cover 14 is provided with a through hole 142 for the main shaft 122 to pass through, and the cover 14 and the main motor 12 can be connected together by using connecting members such as screws.

[0042] Furthermore, in one embodiment, Figure 4 As shown, the blocking portion 141 is provided with a limiting rib 1411, and the surface of the limiting rib 1411 facing the outer wall is an arc-shaped inner concave surface 1412. Figure 2 As shown, the distance L1 between the arcuate inner concave surface 1412 and the outer wall is less than the depth L2 of the snap-fit protrusion 1111 inserted into the snap-fit notch 1311. During the swinging of the main motor 12 relative to the connector 11, the distance between the arcuate inner concave surface 1412 and the outer wall can always be kept less than the depth of the snap-fit protrusion 1111 inserted into the snap-fit notch 1311, thereby ensuring a consistent concave-convex fit between the outer wall and the support tube 111.

[0043] Furthermore, in one embodiment, Figure 1 、 Figure 3 and Figure 6 As shown, the fan head assembly 10 further includes a connecting rod 15, and a blind hole 151 is provided on the connecting rod 15. Figure 3 and Figure 5 As shown, the connector 11 is provided with a support column 112 for supporting the connecting rod 15, and the support column 112 is inserted into the blind hole 151, so that the connecting rod 15 can rotate relative to the connector 11 with the axis of the support column 112 as the rotation axis. Figure 7 As shown, a cantilever 135 is provided on the sleeve 13. The cantilever 135 is positioned on the side of the connecting rod 15 facing away from the support column 112, and is used to retain the support column 112 in the blind hole 151. This allows the connecting rod 15 to rotate relative to the support column 112 while preventing the connecting rod 15 from separating from the support column 112.

[0044] The blind hole 151 on the connecting rod 15 only needs to be set to allow the support column 112 to be inserted therein and the connecting rod 15 to be able to rotate relative to the support column 112. In other words, it is only necessary to consider the matching relationship between the blind hole 151 and the support column 112. The cantilever 135 only needs to be able to be limited to the side of the connecting rod 15 away from the support column 112, without considering the plug-in relationship with the blind hole 151 or the support column 112. Therefore, the accuracy requirements for the angular relationship between the cantilever 135 and the shaft sleeve 13 are relatively low, and the accuracy requirements for the relative position between the cantilever 135 and the connecting rod 15 are relatively low. While meeting the functional requirements, the requirements for manufacturing accuracy are reduced, thereby reducing manufacturing costs.

[0045] Furthermore, during assembly, the connecting rod 15 and the support column 112 only require accurately inserting the support column 112 into the blind hole 151. There are no high-precision fitting requirements between the blind hole 151 and other components. When the bushing 13 is inserted into the support tube 111, the cantilever 135 only needs to be positioned on the side of the connecting rod 15 facing away from the support column 112. There is no plug-in or sleeve-type fitting between the cantilever 135 and the connecting rod 15 or support column 112. This reduces assembly difficulty and improves efficiency.

[0046] like Figure 1 and Figure 3 As shown, in one embodiment, the fan head assembly 10 further includes a swing motor 16, a crank 161 of the swing motor 16 is rotatably connected to the connecting rod 15, and the swing motor 16 and the main motor 12 are relatively fixed in the swing direction.

[0047] Thus, when the swing motor 16 is running, the connecting rod 15 rotates with the axis of the support column 112 as the rotation axis, and the main motor 12 follows the movement. The main motor 12 rotates with the axis of the support shaft 121 as the rotation axis. Figure 6 As shown, a through hole 152 is provided on the connecting rod 15. A connecting member such as a screw passes through the through hole 152 and is connected to the crank 161, so that the connecting rod 15 is rotatably connected to the crank 161.

[0048] Specifically, if Figure 1 As shown, in one embodiment, the plane on which the connecting rod 15 rotates relative to the support column 112 is a reference plane, and the axis of the support column 112 is perpendicular to the reference plane. In other words, the connecting rod 15 rotates on a plane perpendicular to the axis of the support column 112, thereby driving the swing motor 16 at the other end of the connecting rod 15 to swing. Figure 5As shown, the axis of the support column 112 is parallel to the axis of the support cylinder 111. Thus, the axis of rotation of the main motor 12 is parallel to the axis of rotation of the connecting rod 15.

[0049] More specifically, the cantilever 135 can directly contact the connecting rod 15 to limit the connecting rod 15 on the support column 112; or the cantilever 135 and the connecting rod 15 are indirectly arranged, but the spacing distance is small, so that the support column 112 can be at least partially inserted into the blind hole 151.

[0050] For example, in one embodiment. Figure 3 and Figure 6 As shown, the opening of the blind hole 151 is located at the bottom surface 153 of the connecting rod 15. Figure 7 As shown, the portion of the cantilever 135 that is positioned on the connecting rod 15 is a limiting portion. Figure 1 and Figure 3 As shown, the limiting portion is located in the axial direction of the support column 112 and contacts the top surface of the connecting rod 15. In other words, the limiting portion is directly opposite the position where the blind hole 151 is provided on the connecting rod 15, thereby limiting the support column 112 in the blind hole 151 and preventing the connecting rod 15 from separating from the support column 112.

[0051] Or, in another embodiment, Figure 3 and Figure 6 As shown, the opening of the blind hole 151 is located at the bottom surface 153 of the connecting rod 15. Figure 7 As shown, the portion of the cantilever 135 that is positioned on the connecting rod 15 is a limiting portion. Figure 1 and Figure 3 As shown, the limiting portion is located in the axial direction of the support column 112. However, in this embodiment, the limiting portion is spaced apart from the top surface of the connecting rod 15, and the distance between the limiting portion and the connecting rod 15 is less than the depth of the support column 112 inserted into the blind hole 151.

[0052] The connecting rod 15 has some movable space in the axial direction of the support column 112 , but this movable space is not enough to allow the support column 112 to be pulled out of the blind hole 151 , thereby still ensuring that the connecting rod 15 and the support column 112 will not separate.

[0053] More specifically, Figure 7As shown, in one embodiment, the cantilever 135 is a plate-like structure, the plane of which is perpendicular to the axis of the support column 112. In other words, the side of the cantilever 135 facing the connecting rod 15 is the side of the plate-like structure with the largest area. The cantilever 135 is provided with a plurality of auxiliary holes 1351, which form a plurality of interlaced ribs on the cantilever 135. The auxiliary holes 1351 are arranged along the axial direction of the support column 112 and penetrate the cantilever 135.

[0054] Therefore, when the cantilever 135 contacts the connecting rod 15 , the contact area between the cantilever 135 and the connecting rod 15 is small, which effectively reduces the friction between the cantilever 135 and the connecting rod 15 and ensures that the rotation process of the connecting rod 15 is smoother.

[0055] Furthermore, in one embodiment, Figure 5 As shown, the end surface of the support column 112 inserted into the blind hole 151 is provided with a groove 1121. This further reduces the contact area between the support column 112 and the connecting rod 15 and reduces friction.

[0056] More specifically, Figure 3 and Figure 7 As shown, the cantilever 135 is located on the end of the sleeve 13 away from the bottom wall of the support tube 111. When the sleeve 13 is inserted into the support tube 111, the cantilever 135 is suspended outside the support tube 111 and extends to the side of the connecting rod 15 away from the support column 112, thereby retaining the connecting rod 15 on the support column 112.

[0057] Furthermore, in another embodiment, an electric fan is provided, comprising the fan head assembly 10 described in any one of the above embodiments.

[0058] The above solution provides an electric fan, which ensures that the main motor 12 in the electric fan can be reliably and stably supported on the connector 11 by adopting the fan head assembly 10 described in any of the above embodiments.

[0059] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0061] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0064] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A fan head assembly, characterized in that: The motor comprises a connecting head, a main motor and a cover shell, wherein the connecting head is provided with a support cylinder for supporting the main motor, a shaft sleeve is inserted in the support cylinder, a support shaft of the main motor is inserted in the shaft sleeve, and the support shaft and the shaft sleeve are fixed in relative position in the axial direction of the shaft sleeve, a limiting piece is provided on the shaft sleeve, and the limiting piece is matched with the support cylinder in a concave-convex manner, and is used to limit the movement of the shaft sleeve relative to the support cylinder in the axial direction of the support cylinder, the cover shell is connected to the main motor, and the cover shell at least partially corresponds to the position where the limiting piece and the support cylinder are matched in a concave-convex manner, and is used to prevent the limiting piece from moving in the axial direction of the support cylinder. The positioning member is separated from the supporting tube; the limiting member includes an outer wall arranged outside the sleeve, the outer wall is sleeved outside the supporting tube, the outer wall and the supporting tube are matched with each other in a concave-convex manner, and the cover shell is at least partially limited to the outside of the outer wall; a bayonet is provided on the outer wall, and a snap protrusion is provided at a position corresponding to the bayonet on the supporting tube, and the snap protrusion is clamped in the bayonet, and the part of the cover shell used for limiting is a blocking part, and the blocking part is located outside the outer wall, and the distance between the blocking part and the outer wall is less than the depth of the snap protrusion clamped in the bayonet.

2. The fan head assembly according to claim 1, wherein: There are two bayonet holes. When the swing angle of the main motor relative to the connecting head is zero, the fan blades on the main shaft of the main motor are located in front of the connecting head, and the two bayonet holes are respectively located on the front and rear sides of the support tube.

3. The fan head assembly according to claim 1, wherein: The blocking portion is provided with a limiting rib, and the surface of the limiting rib facing the outer wall is an arc-shaped inner concave surface, and the distance between the arc-shaped inner concave surface and the outer wall is smaller than the depth of the buckle protrusion being inserted into the bayonet.

4. The fan head assembly according to any one of claims 1 to 3, characterized in that: It also includes a connecting rod, the connecting head is provided with a support column for supporting the connecting rod, the connecting rod is provided with a blind hole, the support column is inserted into the blind hole, so that the connecting rod can rotate relative to the connecting head with the axis of the support column as the rotating axis, and the sleeve is provided with a cantilever, and the cantilever is limited on the side of the connecting rod away from the support column, for limiting the support column in the blind hole.

5. The fan head assembly according to claim 4, characterized in that: It also includes a swing motor, a crank of the swing motor is rotatably connected to the connecting rod, and the swing motor and the main motor are relatively fixed in the swing direction.

6. The fan head assembly according to claim 4, characterized in that: The opening of the blind hole is located on the bottom surface of the connecting rod, and the portion of the cantilever that is positioned on the connecting rod is a limiting portion. The limiting portion is located in the axial direction of the support column and contacts the top surface of the connecting rod. Alternatively, the opening of the blind hole is located on the bottom surface of the connecting rod, the part of the cantilever that is upper-limited on the connecting rod is a limiting portion, the limiting portion is located in the axial direction of the support column, the limiting portion is spaced apart from the top surface of the connecting rod, and the distance between the limiting portion and the connecting rod is less than the depth of the support column inserted into the blind hole.

7. The fan head assembly according to claim 4, wherein: The cantilever is a plate-like structure, the plane of the plate-like structure is perpendicular to the axis of the support column, a plurality of auxiliary holes are provided on the cantilever, a plurality of mutually staggered ribs are formed on the cantilever, and the auxiliary holes are arranged along the axial direction of the support column and pass through the cantilever.

8. The fan head assembly according to claim 4, wherein: The end surface of the support column inserted into the blind hole is provided with a groove.

9. The fan head assembly according to claim 4, wherein: The plane on which the connecting rod rotates relative to the supporting column is a reference plane, the axis of the supporting column is perpendicular to the reference plane, and the axis of the supporting column is parallel to the axis of the supporting tube.

10. An electric fan, characterized in that: A fan head assembly comprising any one of claims 1 to 9.

Images