A fan with electric pitch mechanism and electric pitch mechanism

Abstract

The utility model discloses a fan with an electric pitch mechanism and the electric pitch mechanism, comprising a support assembly and a fan head group; the support assembly comprises a column and a control body above the column; the control body comprises a base with a panel on the front side and two branches at the upper end of the base; the fan head group comprises a fan head and an electric pitch mechanism; the fan head is connected to the control body through the electric pitch mechanism, so that the fan head can adjust the pitch angle relative to the control body under the drive of the electric pitch mechanism; the outer shell of the fan head is a mesh cover, and the back of the mesh cover is recessed inward to form a concave cavity; the electric pitch mechanism comprises a driving module and a rear cover for accommodating the driving module, and the two sides of the rear cover are rotatably connected to the corresponding branches; the rear cover is placed in the concave cavity, the branches extend into the concave cavity, and the rear cover is fixedly connected to the bottom of the mesh cover where the concave cavity is located; the entire fan head group is provided with technical effects of enhanced stability, smooth movement, compact structure and beautiful appearance.

Description

Technical Field

[0001] The utility model relates to a fan, in particular to a fan with an electric pitch mechanism. When the fan is working, the fan head can be pitched and rotated within a certain angle to realize the output of three-dimensional wind. Background Art

[0002] CN203214362U discloses an electric fan with adjustable pitch angle, which positions a pitch rotating frame by cooperating the toothed clamping position on the bottom end surface of a positioning block with the convex block or the groove on the top end surface of a clamping foot.

[0003] CN202117963U discloses a fan pitch angle adjustment mechanism, which has a large angle positioning range and an adjustable positioning angle range, can realize stepless angle positioning, has no abnormal sound during pitch operation, and has a good hand feel.

[0004] The above two documents disclose manual adjustment mechanisms.

[0005] CN206785749U discloses a pitch positioning installation structure and an electric fan thereof, and discloses that the assembly process of the pitch positioning installation structure of the electric fan is generally to first install an angle positioning piece and a torsion spring on the connector, then install an iron ball and a stop spring on the rear shell of the electric fan, and finally use a screw to connect the connector and the rear shell of the body together for locking. The pitch angle mechanism can also be driven by a synchronous motor to achieve the purpose of electric adjustment, but the existing electric pitch mechanism is more complicated and difficult to assemble. Utility Model Content

[0006] In view of this, the technical problem to be solved by the utility model is a fan with an electric pitch mechanism which is simple in structure and assembly.

[0007] The core technical concept of the utility model is to connect the rear cover module and the branch through the main positioning shaft, so that the fan head can move along a predetermined trajectory during operation to maintain stability and smoothness; and the rear cover and the mesh cover are fixedly connected to achieve stable movement of the fan head and a compact structure, thereby improving the stability and appearance of the fan.

[0008] The technical solution adopted by the utility model to solve the above technical problems is: a fan with an electric pitch mechanism, comprising a support assembly and a fan head assembly;

[0009] The support assembly includes a column and a control body above the column; the control body includes a base with a panel on the front side and two branches at the upper end of the base;

[0010] The fan head assembly includes a fan head and an electric pitch mechanism; the fan head is connected to the control body through the electric pitch mechanism;

[0011] The fan head includes a mesh cover and a fan blade driving device in the mesh cover, and a concave cavity is provided in the middle of the back of the mesh cover;

[0012] The electric pitch mechanism comprises a rear cover, a synchronous motor and a swing assembly installed in the rear cover, wherein the synchronous motor is connected to the swing assembly; the rear cover is rotatably connected between the two branches; the rear cover and the two branches are located in the concave cavity, and the rear cover is fixedly connected to the mesh cover;

[0013] The synchronous motor can drive the fan head assembly to perform pitch rotation relative to the supporting assembly through the swing assembly.

[0014] A further preferred technical solution of the utility model is: the inner cavity of the mesh cover has a bottom, and the rear cover is connected to the bottom through a first screw assembly;

[0015] The motor is fixed on the bracket, the rear end of the bracket is fixed on the rear cover through a second screw assembly, and the front end of the bracket is fixed on the bottom of the net cover through a third screw assembly.

[0016] A further preferred technical solution of the utility model is: the swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve;

[0017] The rear cover comprises a first side wall and a second side wall opposite to each other, the first side wall is provided with a rotatable first positioning shaft, and the second side wall is provided with a rotatable second positioning shaft;

[0018] The two branches include a first branch and a second branch;

[0019] The first positioning shaft is connected and fixed to the first branch, and the second positioning shaft is connected and fixed to the second branch;

[0020] The second end of the connecting rod is connected to the first positioning shaft.

[0021] A further preferred technical solution of the utility model is as follows: the first positioning shaft and the second positioning shaft have the same structure; the first positioning shaft comprises a circular body and a support arm on one side of the circular body; the circular body comprises a small diameter end and a large diameter end, the small diameter end passes through the through hole of the first side wall of the rear cover and is connected to the first branch, and the large diameter end is located on the inner side of the second side wall of the rear cover;

[0022] The support arm is provided with a connecting column, and the connecting column is connected to the through hole on the second end of the connecting rod.

[0023] Another preferred subject of the utility model: a fan with an electric pitch mechanism, comprising a support assembly and a fan head assembly;

[0024] The support assembly includes a column and a control body above the column; the control body includes a base with a panel on the front side and two branches at the upper end of the base;

[0025] The fan head assembly comprises a fan head and an electric pitch mechanism; the fan head is connected to a control body through the electric pitch mechanism, so that the fan head can adjust the pitch angle relative to the control body under the drive of the electric pitch mechanism; the outer shell of the fan head is a mesh cover, and the back of the mesh cover is concave inward to form a concave cavity;

[0026] The electric pitch mechanism comprises a driving module and a rear cover accommodating the driving module, and two sides of the rear cover are rotatably connected to corresponding branches;

[0027] The rear cover is placed in the concave cavity, at least a part of the branch extends into the concave cavity, and the rear cover is fixedly connected to the bottom of the mesh cover where the concave cavity is located.

[0028] A further preferred technical solution of the utility model is: the depth of the concave cavity is equivalent to the width of the rear cover, so that in the initial state, the rear cover is fully hidden in the concave cavity, and in the initial state, the branch extends into the concave cavity in an inclined shape;

[0029] The outer bottom of the cavity is formed with a clearance zone for accommodating at least part of the base and / or branches of the control body; the base below the clearance zone is tilted backward to form an inclined arm, and the inclined arm is spaced a distance from the clearance zone.

[0030] A further preferred technical solution of the utility model is: the driving module includes a linked synchronous motor and a swing assembly, the swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve.

[0031] Another preferred subject: an electric pitch mechanism for driving the fan head assembly to pitch relative to the fixed main body;

[0032] The electric pitch mechanism comprises a rear cover and a bracket installed in the rear cover, a synchronous motor and a swing assembly, wherein the bracket is fixed in the rear cover and the synchronous motor is fixed on the bracket;

[0033] The swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve;

[0034] The rear cover comprises a first side wall and a second side wall opposite to each other, the first side wall is provided with a rotatable first positioning shaft, and the second side wall is provided with a rotatable second positioning shaft;

[0035] The rear cover is rotatably connected between the two branches of the main body;

[0036] The two branches include a first branch and a second branch;

[0037] The first positioning shaft is connected and fixed to the first branch, and the second positioning shaft is connected and fixed to the second branch;

[0038] The second end of the connecting rod is connected to the first positioning shaft;

[0039] The synchronous motor can drive the fan head group to perform pitch rotation relative to the main body through a swing assembly.

[0040] A further preferred technical solution of the utility model is as follows: the first positioning shaft and the second positioning shaft have the same structure; the first positioning shaft comprises a circular body and a support arm on one side of the circular body; the circular body comprises a small diameter end and a large diameter end, the small diameter end passes through the through hole of the first side wall of the rear cover and is connected to the first branch, and the large diameter end is located on the inner side of the second side wall of the rear cover;

[0041] The support arm is provided with a connecting column, and the connecting column is connected to the through hole on the second end of the connecting rod.

[0042] Another preferred subject: an electric pitch mechanism for driving the fan head assembly to pitch relative to the fixed main body;

[0043] The electric pitch mechanism includes a rear cover and a drive module installed in the rear cover.

[0044] The driving module includes a swing assembly and a power source, and the power source drives the swing assembly to operate;

[0045] A rotatable main positioning shaft is provided on one of the side walls of the rear cover;

[0046] One end of the main positioning shaft passes through the through hole of the side wall of the rear cover and is fixedly connected to the branch of the main body, and the other end of the main positioning shaft is connected to the swing assembly to be driven by the swing assembly;

[0047] The rear cover is located between the two branches of the main body. When working, the main positioning shaft driven by the driving module drives the rear cover to pitch and rotate relative to the main body.

[0048] A further preferred technical solution of the utility model is: a rotatable auxiliary positioning shaft is provided on the other side wall of the rear cover, the power source is a synchronous motor, the synchronous motor is fixed on a bracket, and the bracket is fixedly connected in the rear cover;

[0049] The swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve;

[0050] The rear cover comprises a first side wall and a second side wall opposite to each other, the first side wall is provided with a rotatable main positioning shaft, and the second side wall is provided with a rotatable auxiliary positioning shaft;

[0051] The two branches include a first branch and a second branch;

[0052] The main positioning shaft passes through the through hole of the first side wall and is fixedly connected to the first branch, and the auxiliary positioning shaft passes through the through hole of the second side wall and is fixedly connected to the second branch;

[0053] The second end of the connecting rod is connected to the main positioning shaft, and the rear cover is fixedly connected to the outer shell of the fan head group;

[0054] The synchronous motor can drive the fan head group to perform pitch rotation relative to the main body through a swing assembly.

[0055] Compared with the prior art, the utility model has the following advantages: on the one hand, by setting a concave cavity on the back of the mesh cover of the fan head, and then using the close fit between the rear cover and the concave cavity and the two branches, a compact design of the entire fan head structure is achieved. This technical means makes the overall size of the fan smaller and occupies less space.

[0056] On the other hand, the rotational connection between the rear cover and the two branches and the fixed connection with the mesh cover make the entire fan head structure more stable. This connection method can effectively reduce the noise and vibration caused by loose parts during use, ensuring the stability and safety of the fan. In addition, the presence of the concave cavity provides stable support and positioning for the rear cover and branches, making them less likely to move or shake due to external interference during the operation of the fan. This helps to reduce the noise and vibration that may be generated by the fan during operation and improves the comfort of the fan.

[0057] In addition, the presence of the concave cavity allows the rear cover and branches to be hidden inside the structure of the fan head, making the entire fan head look neater and simpler, enhancing the aesthetics of the product. The design of hiding the rear cover and branches makes the fan look more refined and meets the aesthetic requirements of modern home environments.

[0058] Furthermore, for the electric pitch mechanism, the main positioning shaft is used to connect the power source and the branch, so that the driving force can be more accurately transmitted to the fan head group to achieve the pitch rotation of the fan head. As one of the key components connecting the power source and the branch, the main positioning shaft can provide stable support and positioning, so that the fan head is not easily shaken or swung by external interference during operation.

[0059] The main positioning shaft passes through the rear cover connecting branch, and the rear cover is fixedly connected to the mesh cover. The synergistic effect of these two technical means brings multiple technical effects such as enhanced stability, smooth movement, compact structure and beautiful appearance to the entire fan head group, providing important guarantees for the performance and quality of the fan head. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0061] Figure 1 The overall structure of the fan of the utility model is shown in FIG. Figure 1 ;

[0062] Figure 2 This is a schematic diagram of the side structure of the fan of the utility model;

[0063] Figure 3 The overall structure of the fan of the utility model is shown in FIG. Figure 2 ;

[0064] Figure 4 This is a schematic diagram of the structural disassembly of the electric pitch mechanism;

[0065] Figure 5 It is a schematic diagram of the control body, the positioning shaft and the rear cover;

[0066] Figure 6 It is a schematic diagram of a synchronous motor, a swing assembly and a positioning shaft;

[0067] Figure 7 It is a schematic diagram of the structure of the rear cover and the positioning shaft;

[0068] Figure 8 is a schematic diagram of the overall structure of the first positioning shaft;

[0069] Fig. 9 It is a schematic diagram of the assembly structure of the synchronous motor and the swing component;

[0070] Fig.10 It is a schematic diagram of the structure in which the bracket is fixed on the rear cover;

[0071] Fig.11 It is a schematic diagram of the local coordination between the branch and the positioning shaft;

[0072] Fig.12 This is a schematic diagram of the coordination between the fan head and the rear cover;

[0073] Fig.13 This is a schematic diagram of the structure of the concave cavity on the back of the fan head. DETAILED DESCRIPTION

[0074] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0075] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0076] like Figures 1 to 3 As shown, a fan 100 with an electric pitch mechanism is designed to provide a more intelligent and convenient use experience. The fan includes a support assembly 101 and a fan head assembly 102. The support assembly 101 includes a column 10 and a control body 20 above the column 10. The control body 20 has an ingenious and flexible structural design, and a panel is provided on the front side of its base 21, highlighting the modern sense and aesthetics, and the upper end of the base 21 is provided with two branches 22, which provide reliable support and connection for the installation of the fan head assembly 102.

[0077] like Figure 4 As shown, the fan head group 102 is the core component of the fan, which includes a fan head 30 and an electric pitch mechanism 40. The fan head 30 is connected to the control body 20 through the electric pitch mechanism 40, so that the fan head 30 can adjust the pitch angle relative to the control body 20 under the drive of the electric pitch mechanism 40. This structure is one of the unique features of the fan. The overall layout of the fan head 30 is simple and powerful. It is equipped with an efficient fan blade drive device inside, which can generate strong wind force and bring cool enjoyment to users. The electric pitch mechanism 40 enables the fan head 30 to achieve precise adjustment of the pitch angle, thereby meeting the user's usage needs in different scenarios.

[0078] Through the design of the electric pitch mechanism 40, the user can accurately adjust the pitch angle of the fan head 30 through simple operation or a remote control, thereby realizing intelligent control and improving the user's convenience and comfort.

[0079] The branch 22 of the control body 20 is tightly connected and cleverly matched with the fan head assembly 102, so that the connection point between the fan head 30 and the support assembly is more concise, tightly matched and reasonable, and the fan can be more stable and more controlled when it pitches and rotates. In addition, the overall structure of the fan is compact, which effectively saves the use space, so that the fan 100 can be more flexibly applied to various environments and scenes, including homes, offices, commercial places, etc.

[0080] It should be noted that the fan head 30 includes a mesh cover 31 and a blade driving device in the mesh cover 31. The synergistic effect of these components provides the fan with efficient wind output. A cavity h is provided in the middle of the back of the mesh cover 31. The back of the mesh cover 31 is recessed inward to form the cavity h.

[0081] On the one hand, the cavity h is designed to optimize the structure of the fan head, making the overall appearance more streamlined while increasing the efficiency of air flow. The design of the cavity h can also help reduce the weight of the fan head and improve the convenience of carrying and installation.

[0082] More importantly, the design of the cavity h should fully consider the size and shape of the rear cover 41 and the branch 22, so that they can be effectively placed in the cavity h, thereby achieving the best layout effect. Through careful design, the overall structure of the fan head can be ensured to be compact.

[0083] In addition, the rear cover 41 and the branch 22 are installed in the cavity h, forming a unique layout of integrated assembly in an independent area. It is convenient to install and disassemble the rear cover 41 and the branch 22. In addition, the cavity h is a hidden structure, that is, the rear cover 41 and the branch 22 are completely hidden inside the cavity, so that the fan head can present a more concise and neat appearance when not in use. This design not only improves the aesthetics of the product, but also effectively protects the rear cover 41 and the branch 22 and prolongs their service life.

[0084] The rear cover 41 is placed in the concave cavity h, and at least a portion of the branch 22 extends into the concave cavity h, ensuring that the structure of the fan head is compact and stable. The rear cover 41 is fixedly connected to the bottom g of the mesh cover 31 where the concave cavity h is located. Specifically, the inner cavity of the mesh cover 31 has a bottom g, and the rear cover 41 is fixedly connected to the bottom g through a first screw assembly. The rear cover 41 is fixedly connected to the mesh cover 31 to form a complete fan head structure, thereby enhancing the integrity of the fan head.

[0085] The bottom g matches the shape and size of the rear cover 41 to ensure a tight connection, and the use of a screw assembly can ensure the stability of the fan head structure, especially when pitching and rotating. It ensures that the rear cover 41 will not loosen or fall off when the fan is running, and can also reduce the noise that may be generated during the operation of the fan head.

[0086] Preferably, if Figure 2As shown, the depth of the cavity h is equivalent to the width of the rear cover 41, ensuring that the rear cover 41 can be completely hidden in the cavity h in the initial state, so that the entire fan head presents a neater and more beautiful appearance in the closed state. In addition, the branch 22 extends into the cavity h in an inclined shape in the initial state. This technical means not only helps to better adapt to the shape of the rear cover 41, but also ensures that the branch 22 is more closely combined with the cavity h, thereby enhancing the overall stability and durability.

[0087] The clearance area u formed at the bottom of the outer edge of the cavity h is a clever structural feature, which provides additional space for the base and / or branches of the control body 20. In this way, even if some parts of the base 21 or branches 22 protrude slightly, it will not affect the normal operation of the fan head.

[0088] At the same time, the base 21 below the air avoidance zone u is tilted backwards to form an inclined arm v. This structure not only helps to further reduce the overall height of the fan head, but also improves its stability. Moreover, the reasonable setting of the distance between the inclined arm v and the air avoidance zone u can effectively prevent unnecessary collisions between the base 21 or the branch 22 and the air avoidance zone u, thereby extending the service life of the fan head and improving the user experience.

[0089] In summary, the above technical means not only make the fan head structure more compact and stable, but also improve its appearance and functionality. At the same time, they also further reduce the noise and vibration that may occur during the operation of the fan head, creating a larger space for the product to provide a more comfortable use experience.

[0090] It should be noted that the electric pitch mechanism 40 is an important component of the fan head, and is intended to enable the fan head group 102 to pitch relative to the fixed main body (i.e., the control main body 20). The structure includes a precisely designed rear cover 41, which is closely connected to other components of the fan head and accommodates the key drive module.

[0091] The driving module includes a swing assembly 43 and a power source. The power source drives the swing assembly 43 to operate, thereby realizing the pitch rotation of the fan head group 102.

[0092] In order to achieve precise positioning and control, a rotatable main positioning shaft is provided on at least one side wall. This main positioning shaft is directly controlled by the drive module, so that the fan head can be precisely positioned and adjusted in the vertical direction. This design not only improves the convenience of using the fan, but also meets the user's precise requirements for angle adjustment.

[0093] like Figure 5As shown, one end of the main positioning shaft passes through the through hole p of the side wall of the rear cover 41 and is fixedly connected to the branch 22 of the main body, ensuring a firm connection between the main positioning shaft and the main body, providing a stable support for the fan head. The other end of the main positioning shaft is connected to the swing assembly 43 to be driven by the swing assembly 43, thereby realizing the pitch rotation of the fan head.

[0094] The rear cover 41 is located between the two branches 22 of the main body. When working, the main positioning shaft controlled by the drive module drives the rear cover 41 to pitch and rotate relative to the main body. This design forms a stable connection between the rear cover 41 and the mesh cover 31, thereby achieving the pitch and rotation of the entire fan head group 102. Through this mechanism, the fan head can maintain stability during the pitch and rotation process and provide uniform and comfortable wind output at different angles.

[0095] In order to facilitate the understanding of the context, it should be noted that the main positioning shaft in this embodiment is equivalent to the first positioning shaft r1, and the auxiliary positioning shaft is equivalent to the second positioning shaft r2.

[0096] The following will be explained in more detail. This section provides more specific details, emphasizes the composition and connection method of the drive mechanism, and further reveals the working principle and components of the electric pitch mechanism: Figure 6 As shown, the above driving module includes a linked synchronous motor 42 and a swing assembly 43, that is, the electric pitch mechanism 40 includes a rear cover 41 and a synchronous motor 42 and a swing assembly 43 installed in the rear cover 41, and the synchronous motor 42 is connected to the swing assembly 43; the rear cover 41 is rotatably connected between the two branches 22.

[0097] The synchronous motor 42 and the swing assembly 43 achieve effective cooperation. As the main power source, the synchronous motor 42 is responsible for providing sufficient driving force to start and maintain the operation of the swing assembly 43. The swing assembly 43 receives the power transmission from the motor and converts the power into the pitch rotation of the fan head through its mechanical structure.

[0098] In addition, the rear cover 41 is not only used to accommodate the drive module, but also serves as a key to the connection. The rear cover 41 is rotatably connected between the two branches 22. This design enables the fan head to achieve pitch rotation without losing structural stability. This connection method ensures the smooth movement of the fan head and ensures the reliability and durability of the entire structure.

[0099] like Figure 6As shown, the swing assembly 43 includes an eccentric sleeve d1 and a connecting rod d2, and the output shaft c1 of the synchronous motor 42 is connected to the first end of the connecting rod d2 through the eccentric sleeve d1. Through the combination of the eccentric sleeve d1 and the connecting rod d2, the swing assembly 43 can convert the rotational motion provided by the synchronous motor 42 into linear motion, thereby driving the pitch motion of the fan head.

[0100] like Fig. 9 and Fig.10 As shown, the synchronous motor 42 is fixed on a bracket c2, and the bracket c2 is fixed in the rear cover 41.

[0101] like Fig.12 and Fig.13 As shown, the rear cover 41 and the two branches 22 are located in the concave cavity h, and the rear cover 41 is fixedly connected to the mesh cover 31. The specific technical means have been explained above - the rear cover 41 is fastened to the bottom g of the mesh cover 31 by a screw assembly, so that the rear cover 41 can form a whole with the mesh cover 31 and perform pitch rotation.

[0102] Based on the above technical means, the synchronous motor 42 can drive the fan head assembly 102 to perform pitch rotation relative to the supporting assembly 101 through the swing assembly 43.

[0103] When the fan is started, the electric pitch mechanism starts to work. The synchronous motor 42 transmits power through the swing assembly 43, so that the rear cover 41 starts to pitch relative to the control body 20. Since the rear cover 41 is fixedly connected to the mesh cover 31, the entire fan head group 102 starts to pitch.

[0104] At the same time, the fan blade driving device in the fan head 30 starts to rotate, generating airflow. As the fan head rotates in pitch, the direction of the airflow changes accordingly. The user can adjust the electric pitch mechanism by controlling the operation button on the main body 20 or the remote control, thereby controlling the pitch angle of the fan head.

[0105] During the entire operation, the pitch angle of the fan head 30 can be adjusted according to the needs of the user to provide the user with a comfortable wind speed and direction. This design not only improves the functionality and flexibility of the fan, but also increases the user's comfort, making the use of the fan more convenient and enjoyable.

[0106] More specifically, the rear cover 41 includes two side walls, both of which are provided with a positioning shaft r. For example, the rear cover 41 includes a first side wall f1 and a second side wall f2 opposite to each other, the first side wall f1 is provided with a rotatable first positioning shaft r1, and the second side wall f2 is provided with a rotatable second positioning shaft r2.

[0107] The two branches 22 include a first branch and a second branch. The first positioning shaft r1 is fixedly connected to the first branch, the second positioning shaft r2 is fixedly connected to the second branch, and the second end of the connecting rod d2 is connected to the first positioning shaft r1.

[0108] Both sides of the rear cover 41 can be connected to the main body 20 through the branches 22 to achieve the pitch rotation of the fan head.

[0109] Preferably, the first positioning shaft r1 and the second positioning shaft r2 have the same structure to save production costs. Of course, they can also be different. The second positioning shaft is a passive shaft, which mainly serves the purpose of balancing the rotation of the two sides of the rear cover 41. The same or different structures can achieve this fundamental purpose. The same structure is only an optimization choice.

[0110] For the active positioning shaft, the first positioning shaft r1 includes a circular body 01 and a support arm 02 on one side of the circular body 01. The circular body 01 includes a small diameter end s1 and a large diameter end s2. The small diameter end s1 passes through the through hole p of the first side wall f1 of the rear cover 41 and is connected to the first branch, and the large diameter end s2 is located on the inner side of the second side wall f2 of the rear cover 41. Thus, the purpose of connecting the rear cover 41 and the branch 22 through the active positioning column is achieved. The different diameter ends of the circular body 01 can provide good connectivity and structural strength, thereby enhancing the stability and durability of the entire device.

[0111] A connecting column 03 is provided on the supporting arm 02, and the connecting column 03 is connected to the through hole t on the second end of the connecting rod d2.

[0112] Furthermore, if Fig.10 As shown, a positioning component is provided between the branch 22 and the positioning shaft r, in order to ensure stable positioning between the small diameter end s1 of the positioning shaft r and the side wall of the branch 22. The positioning component includes a convex rib k1 located on the inner wall of the small diameter end s1 and a groove k2 located on the side wall of the branch 22. The convex rib k1 and the groove k2 fit each other, and can effectively guide the small diameter end s1 of the positioning shaft r to achieve preliminary positioning on the side wall of the branch 22.

[0113] Furthermore, if Fig.11 As shown, a plurality of positioning holes distributed in an annular manner are provided on the inner side of the side wall of the branch 22, and a plurality of positioning columns are arranged on the inner wall of the small diameter end s1 corresponding to the positioning shaft r. The positioning columns are inserted into the positioning holes and fastened by screws, thereby ensuring a firm connection between the branch 22 and the positioning shaft r.

[0114] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. "First" and "second" are only for the purpose of making the description easier to understand, without any other directional meaning, and cannot be used as a limitation on the present utility model.

[0115] The above is an introduction to a fan with an electric pitch mechanism and a pitch mechanism provided by the utility model. This article uses specific examples to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A fan with an electric pitch mechanism, characterized in that: Includes a support assembly and a fan head assembly; The support assembly includes a column and a control body above the column; the control body includes a base with a panel on the front side and two branches at the upper end of the base; The fan head assembly includes a fan head and an electric pitch mechanism; the fan head is connected to the control body through the electric pitch mechanism; The fan head includes a mesh cover and a fan blade driving device in the mesh cover, and a concave cavity is provided in the middle of the back of the mesh cover; The electric pitch mechanism comprises a rear cover, a synchronous motor and a swing assembly installed in the rear cover, wherein the synchronous motor is connected to the swing assembly; the rear cover is rotatably connected between the two branches; the rear cover and the two branches are located in the concave cavity, and the rear cover is fixedly connected to the mesh cover; The synchronous motor can drive the fan head assembly to perform pitch rotation relative to the support assembly through the swing assembly; The swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve; The rear cover comprises a first side wall and a second side wall opposite to each other, the first side wall is provided with a rotatable first positioning shaft, and the second side wall is provided with a rotatable second positioning shaft; The two branches include a first branch and a second branch; The first positioning shaft is connected and fixed to the first branch, and the second positioning shaft is connected and fixed to the second branch; The second end of the connecting rod is connected to the first positioning shaft.

2. A fan with an electric pitch mechanism according to claim 1, characterized in that: The inner cavity of the mesh cover has a bottom, and the rear cover is connected to the bottom through a first screw assembly; The motor is fixed on the bracket, the rear end of the bracket is fixed on the rear cover through a second screw assembly, and the front end of the bracket is fixed on the bottom of the net cover through a third screw assembly.

3. A fan with an electric pitch mechanism according to claim 1, characterized in that: The first positioning shaft and the second positioning shaft have the same structure; the first positioning shaft comprises a circular body and a support arm on one side of the circular body; the circular body comprises a small diameter end and a large diameter end, the small diameter end passes through the through hole of the first side wall of the rear cover and is connected to the first branch, and the large diameter end is located on the inner side of the second side wall of the rear cover; The support arm is provided with a connecting column, and the connecting column is connected to the through hole on the second end of the connecting rod.

4. A fan with an electric pitch mechanism, characterized in that: Includes a support assembly and a fan head assembly; The support assembly includes a column and a control body above the column; the control body includes a base with a panel on the front side and two branches at the upper end of the base; The fan head assembly comprises a fan head and an electric pitch mechanism; the fan head is connected to a control body through the electric pitch mechanism, so that the fan head can adjust the pitch angle relative to the control body under the drive of the electric pitch mechanism; the outer shell of the fan head is a mesh cover, and the back of the mesh cover is concave inward to form a concave cavity; The electric pitch mechanism comprises a driving module and a rear cover accommodating the driving module, and two sides of the rear cover are rotatably connected to corresponding branches; The rear cover is placed in the concave cavity, at least a part of the branch extends into the concave cavity, and the rear cover is fixedly connected to the bottom of the mesh cover where the concave cavity is located; The driving module comprises a linked synchronous motor and a swinging assembly, the swinging assembly comprises an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve.

5. A fan with an electric pitch mechanism according to claim 4, characterized in that: The depth of the concave cavity is equivalent to the width of the rear cover, so that in the initial state, the rear cover is fully hidden in the concave cavity, and in the initial state, the branch extends into the concave cavity in an inclined shape; The outer bottom of the cavity is formed with a clearance zone for accommodating at least part of the base and / or branches of the control body; the base below the clearance zone is tilted backward to form an inclined arm, and the inclined arm is spaced a distance from the clearance zone.

6. The electric pitch mechanism is used to drive the fan head assembly to pitch relative to the fixed main body; its characteristics are: The electric pitch mechanism comprises a rear cover and a bracket installed in the rear cover, a synchronous motor and a swing assembly, wherein the bracket is fixed in the rear cover and the synchronous motor is fixed on the bracket; The swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve; The rear cover comprises a first side wall and a second side wall opposite to each other, the first side wall is provided with a rotatable first positioning shaft, and the second side wall is provided with a rotatable second positioning shaft; The rear cover is rotatably connected between the two branches of the main body; The two branches include a first branch and a second branch; The first positioning shaft is connected and fixed to the first branch, and the second positioning shaft is connected and fixed to the second branch; The second end of the connecting rod is connected to the first positioning shaft; The synchronous motor can drive the fan head group to perform pitch rotation relative to the main body through a swing assembly.

7. The electric pitch mechanism according to claim 6, characterized in that: The first positioning shaft and the second positioning shaft have the same structure; the first positioning shaft comprises a circular body and a support arm on one side of the circular body; the circular body comprises a small diameter end and a large diameter end, the small diameter end passes through the through hole of the first side wall of the rear cover and is connected to the first branch, and the large diameter end is located on the inner side of the second side wall of the rear cover; The support arm is provided with a connecting column, and the connecting column is connected to the through hole on the second end of the connecting rod.

8. The electric pitch mechanism is used to drive the fan head assembly to pitch relative to the fixed main body; its characteristics are: The electric pitch mechanism includes a rear cover and a drive module installed in the rear cover. The driving module includes a swing assembly and a power source, and the power source drives the swing assembly to operate; A rotatable main positioning shaft is provided on one of the side walls of the rear cover; One end of the main positioning shaft passes through the through hole of the side wall of the rear cover and is fixedly connected to the branch of the main body, and the other end of the main positioning shaft is connected to the swing assembly to be driven by the swing assembly; The rear cover is located between the two branches of the main body. When working, the main positioning shaft driven by the driving module drives the rear cover to pitch and rotate relative to the main body; A rotatable auxiliary positioning shaft is provided on the other side wall of the rear cover, and the power source is a synchronous motor, which is fixed on a bracket, and the bracket is fixedly connected in the rear cover; The swing assembly includes an eccentric sleeve and a connecting rod, and the output shaft of the synchronous motor is connected to the first end of the connecting rod through the eccentric sleeve; The rear cover comprises a first side wall and a second side wall opposite to each other, the first side wall is provided with a rotatable main positioning shaft, and the second side wall is provided with a rotatable auxiliary positioning shaft; The two branches include a first branch and a second branch; The main positioning shaft passes through the through hole of the first side wall and is fixedly connected to the first branch, and the auxiliary positioning shaft passes through the through hole of the second side wall and is fixedly connected to the second branch; The second end of the connecting rod is connected to the main positioning shaft, and the rear cover is fixedly connected to the outer shell of the fan head group; The synchronous motor can drive the fan head group to perform pitch rotation relative to the main body through a swing assembly.

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