A fan device

Abstract

This utility model provides a fan device, relating to the field of fan technology. The fan device includes a head and a fan shroud. The head includes a shroud and a power output shaft that rotates relative to the shroud, the power output shaft having a first connecting structure. The fan shroud includes a shroud body, a fan blade structure, and a driving mechanism. The shroud body is rotatably engaged with the shroud. The fan blade structure includes a hub, movably disposed on the shroud body, the hub having a channel for the power output shaft to pass through and a second connecting structure that cooperates with the first connecting structure. The driving mechanism is movably disposed on the shroud body and is used to drive the hub to move relative to the power output shaft when subjected to force, so that the first and second connecting structures engage. This utility model's fan device can reduce the difficulty of assembling and disassembling the fan shroud and head, thereby improving the efficiency of fan shroud assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and more specifically, to a fan device. Background Technology

[0002] In the structure of fan units, the fan cover is usually fixed to the head unit with screws or complex elastic clips, and the fan blades inside the fan cover are fixedly connected to the output shaft of the head unit with nuts. However, the above structure makes it difficult to install and remove the fan cover from the head unit, making it difficult for users to easily remove the fan cover for cleaning. For example, when users disassemble the fan cover, they usually need to first open the fan cover and release the lock between the fan blades and the motor shaft, and then release the fixation between the fan cover and the head unit, which is quite cumbersome. Utility Model Content

[0003] The problem solved by this invention is how to reduce the difficulty of assembling and disassembling the wind shield and the machine head, so as to improve the efficiency of wind shield assembly and disassembly.

[0004] To address the aforementioned problems, this utility model provides a fan device, including a head and a shroud; the head includes a shroud and a power output shaft that rotates relative to the shroud, the power output shaft having a first connecting structure; the shroud includes a shroud body, a fan blade structure, and a driving mechanism; the shroud body is rotatably engaged with the shroud; the fan blade structure includes a hub, the hub being movably disposed on the shroud body, the hub having a channel for the power output shaft to pass through and a second connecting structure that cooperates with the first connecting structure; the driving mechanism is movably disposed on the shroud body and is used to drive the hub to move relative to the power output shaft when subjected to force, so that the first connecting structure and the second connecting structure engage.

[0005] Optionally, the first connecting structure is a first slot structure disposed on the circumferential sidewall of the power output shaft; the second connecting structure is an elastic buckle disposed on the wheel hub, and the engaging part of the elastic buckle is located on the moving path of the power output shaft; when the engaging part of the elastic buckle is located in the first slot structure, the first connecting structure and the second connecting structure are in a snap-fit ​​state.

[0006] Optionally, the edges of the first slot structure have rounded corners or chamfered edges; And / or, the first slot structure is arranged circumferentially around the power output shaft; the cross-sectional shape of a portion of the power output shaft and the corresponding inner wall of the channel is non-circular.

[0007] Optionally, the circumferential sidewall of the power output shaft is provided with a first step structure, the step surface of the first step structure facing the first slot structure; the hub is provided with a second step structure, the second step structure is located inside the channel or at the end of the channel near the hood, and the step surface of the second step structure facing the hood; when the first connecting structure and the second connecting structure are in a snap-fit ​​state, the step surfaces of the first step structure and the second step structure are in contact.

[0008] Optionally, the wind shield includes a mounting base having a first through channel; the hub includes a blade connecting hub and a bushing, the bushing being coaxially connected to the blade connecting hub; the bushing passes through the mounting base via the first through channel and is movable relative to the mounting base; a portion of the channel passes through the bushing, and another portion of the channel is disposed within the blade connecting hub.

[0009] Optionally, the hub further includes a baffle plate, which is detachably disposed at one end of the bushing passing through the first through channel, and at least a portion of the projection of the baffle plate onto the bushing is located outside the contour range of the channel.

[0010] Optionally, the air outlet end of the shroud body is provided with a second through channel along the axial direction of the power output shaft; the pushing mechanism includes a pressing plate, a pushing member and a first elastic member; the first elastic member connects the pressing plate and the air outlet end of the shroud body; one end of the pushing member is connected to the pressing plate, and the other end passes through the second through channel; the hub is located on the moving path of the pushing member.

[0011] Optionally, the front end face of the wind shield body has one of a guide post and a guide groove structure, and the pressing plate has the other of a guide post and a guide groove structure, wherein the guide post is slidably disposed in the guide groove structure along the axial direction of the power output shaft.

[0012] Optionally, one of the shroud body and the shroud is provided with a second slot structure, and the other of the shroud body and the shroud is provided with a first locking block; when the shroud body and the shroud rotate relative to each other, the first locking block is adapted to enter or exit the second slot structure.

[0013] Optionally, the machine head also includes a locking device, which is disposed on the machine cover and used to lock or unlock the machine cover and the fan cover body.

[0014] Compared with related technologies, the beneficial effects of this utility model are as follows: When installing the fan cover onto the machine head, the fan cover body and the machine cover are first engaged by rotation. Then, an external force is applied to the pushing mechanism, which causes the hub to move relative to the power output shaft, thereby engaging the second connecting structure with the first connecting structure and realizing the transmission connection between the fan blade structure and the power output shaft. This process does not require the user to use tools or manually tighten the nuts; it can be completed simply by rotating the fan cover and applying the necessary force, significantly simplifying the assembly operation. When removing the fan cover from the machine head, the engagement between the fan cover body and the machine cover is first released by reverse rotation. Then, the fan cover is pulled outward as a whole, causing the first connecting structure and the second connecting structure to separate along the axial direction of the power output shaft under the pulling force, thus separating the two. This process does not require the user to use tools and avoids the cumbersome process of opening the fan cover body beforehand in traditional structures, significantly simplifying the disassembly operation. In summary, the fan device of this utility model can reduce the difficulty of installing and removing the fan cover from the machine head, thereby improving the efficiency of fan cover installation and removal. Attached Figure Description

[0015] Figure 1 A cross-sectional view of the fan device according to an embodiment of the present utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the machine head in an embodiment of the present utility model; Figure 3 This is a cross-sectional view of the fan blade structure according to an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the rear mesh cover according to an embodiment of the present utility model; Figure 5 This is a cross-sectional view of the rear mesh cover and the pushing mechanism after assembly according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of the rear mesh cover according to an embodiment of the present utility model; Figure 7 A cross-sectional view of the fan device according to an embodiment of the present utility model. Figure 2 ; Figure 8 for Figure 7 A magnified view of a section at point A in the middle; Figure 9 This is a schematic diagram of the locking device according to an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 100. Machine head; 101. Machine cover; 102. Power take-off shaft; 1021. First slot structure; 1022. First step structure; 103. Second slot structure; 104. Locking device; 1041. Pull rod; 1042. Second elastic element; 1043. Wrench; 105. Drive motor; 200. Fan cover; 201. Fan cover body; 2011. Front mesh cover; 20111. Second through channel; 2012. Rear mesh cover; 2 013, Mounting base; 2014, First through channel; 2015, First locking block; 2016, Receiving groove; 202, Fan blade structure; 2021, Hub; 20211, Blade connecting hub; 20212, Bushing; 2022, Channel; 2023, Elastic buckle; 2024, Baffle; 2025, Second step structure; 203, Pushing mechanism; 2031, Pressing plate; 2032, Pushing component; 2033, First elastic component. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model.

[0018] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "optionally" means "optional embodiments". Definitions of other terms will be given in the description below. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0019] In the description of this utility model, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0020] The fan device of this utility model embodiment includes a head unit 100 and a fan shroud 200. The head unit 100 includes a shroud 101 and a power output shaft 102 that rotates relative to the shroud 101. The power output shaft 102 has a first connecting structure. The fan shroud 200 includes a shroud body 201, a fan blade structure 202, and a pushing mechanism 203. The shroud body 201 is rotatably engaged with the shroud 101. The fan blade structure 202 includes a hub 2021, which is movably disposed on the shroud body 201. The hub 2021 has a channel 2022 through which the power output shaft 102 passes and a second connecting structure that cooperates with the first connecting structure. The pushing mechanism 203 is movably disposed on the shroud body 201 and is used to drive the hub 2021 to move relative to the power output shaft 102 when subjected to force, so that the first connecting structure and the second connecting structure are engaged.

[0021] Specifically, such as Figure 1 , 2 As shown in Figure 3, a drive motor 105 is provided inside the housing 101. The power output shaft 102 can be the motor shaft of the drive motor 105 or a transmission shaft connected to the motor shaft; preferably, it is a transmission shaft connected to the motor shaft. When the drive motor 105 is working, it can cause the power output shaft 102 to rotate through the motor shaft. At the same time, the front end of the power output shaft 102 has a first connecting structure. The rear end of the fan cover body 201 is rotatably engaged with the front end of the housing 101. The hub 2021 of the fan blade structure 202 is movably disposed on the fan cover body 201. A channel 2022 is provided in the middle of the hub 2021, through which the power output shaft 102 can pass. The hub 2021 also has a second connecting structure that cooperates with the first connecting structure. The pushing mechanism 203 is movably disposed at the front end of the fan cover body 201. When subjected to force, it can drive the hub 2021 to move relative to the power output shaft 102, so that the first connecting structure and the second connecting structure are engaged.

[0022] In this embodiment, when installing the fan cover 200 onto the head unit 100, the fan cover body 201 and the head unit 101 are first engaged by rotation. Then, an external force is applied to the pushing mechanism 203, which causes the hub 2021 to move relative to the power output shaft 102, thereby engaging the second connecting structure with the first connecting structure and realizing the transmission connection between the fan blade structure 202 and the power output shaft 102. This process does not require the user to use tools or manually tighten nuts; it only requires rotating the fan cover 200 and applying the necessary force, significantly simplifying the assembly operation. When removing the fan cover 200 from the head 100, first rotate it in the opposite direction to release the locking between the fan cover body 201 and the head 101. Then, pull the fan cover 200 outward as a whole, so that the first connecting structure and the second connecting structure are separated along the axial direction of the power output shaft 102 under the action of tension, thus achieving separation of the two. This process does not require the user to use tools and avoids the cumbersome process of opening the fan cover body 201 in advance in the traditional structure, which significantly simplifies the disassembly operation. In summary, the fan device of this utility model can reduce the difficulty of assembling and disassembling the fan cover 200 and the head 100, thereby improving the efficiency of assembling and disassembling the fan cover 200.

[0023] Optionally, the first connecting structure is a first slot structure 1021 disposed on the circumferential sidewall of the power output shaft 102; the second connecting structure is an elastic buckle 2023 disposed on the hub 2021, and the engaging part of the elastic buckle 2023 is located on the moving path of the power output shaft 102; when the engaging part of the elastic buckle 2023 is located in the first slot structure 1021, the first connecting structure and the second connecting structure are in a snap-fit ​​state.

[0024] Specifically, the shape of the first slot structure 1021 is determined according to actual needs and is not specifically limited here. It is set on the circumferential side wall of the front end of the power output shaft 102. The elastic buckle 2023 is set on the front end of the hub 2021, and the fastening part of the elastic buckle 2023 is located on the moving path of the power output shaft 102. Thus, when the power output shaft 102 passes through the channel 2022 of the hub 2021, the part of the power output shaft 102 without the first slot structure 1021 will cause the elastic buckle 2023 to undergo elastic deformation. When the first slot structure 1021 and the elastic buckle 2023 are aligned, the fastening part of the elastic buckle 2023 will be engaged in the first slot structure 1021 to realize the engagement of the hub 2021 and the power output shaft 102.

[0025] Optionally, the edges of the first slot structure 1021 have rounded corners or chamfered corners.

[0026] In this optional embodiment, since the edge of the first slot structure 1021 is pre-set with a rounded corner structure or a chamfered structure, when the pushing mechanism 203 drives the hub 2021 to move toward the hood 101 or disassembles the hood body 201, the engaging part of the elastic buckle 2023 first slides into contact with the rounded corner structure / chamfered structure, is smoothly guided under continuous thrust and automatically generates radial elastic expansion, and then slides into or out of the first slot structure 1021; significantly reducing the peak stress and wear at the moment of buckle insertion or disengagement, and preventing the elastic buckle 2023 from chipping or permanently deforming due to impact.

[0027] Optionally, the first slot structure 1021 is arranged circumferentially around the power output shaft 102; the cross-sectional shape of a portion of the power output shaft 102 and the inner wall of the corresponding channel 2022 is non-circular and matches each other.

[0028] Specifically, such as Figure 2 As shown, the first slot structure 1021 is an annular groove, which is arranged around the power output shaft 102 in the circumferential direction; the front end of the power output shaft 102 and the corresponding inner wall of the channel 2022 have a non-circular cross-sectional shape that matches, such as a regular pentagon or a regular hexagon.

[0029] In this optional embodiment, the non-circular cross-section eliminates the traditional "groove alignment-groove" step, while the annular first slot structure 1021 eliminates the limitation of angle uniqueness. The coupling of the two allows the user to push in and lock the device in one go without deliberate alignment, which not only ensures the reliable transmission of torque between the fan blade structure 202 and the power output shaft 102, but also significantly reduces the difficulty of operation and assembly time, and avoids the breakage of the buckle caused by misinsertion. Thus, the durability and convenience of the quick-release mechanism are maintained even in scenarios of multiple disassemblies and cleanings.

[0030] Optionally, a first step structure 1022 is provided on the circumferential sidewall of the power output shaft 102, with the step surface of the first step structure 1022 facing the first slot structure 1021; a second step structure 2025 is provided on the hub 2021, with the second step structure 2025 located inside the channel 2022 or at the end of the channel 2022 near the hood 101, and the step surface of the second step structure 2025 facing the hood 101; when the first connecting structure and the second connecting structure are in a snap-fit ​​state, the step surfaces of the first step structure 1022 and the second step structure 2025 are in contact.

[0031] like Figure 2 As shown, a first step structure 1022 is provided on the circumferential sidewall at the middle position of the power output shaft 102, and the step surface of the first step structure 1022 is oriented towards the first slot structure 1021; as Figure 3As shown, the channel 2022 is provided with a second step structure 2025 inside, and the step surface of the second step structure 2025 is set towards the cover 101; thus, when the first connecting structure and the second connecting structure are in a snap-fit ​​state, the step surfaces of the first step structure 1022 and the second step structure 2025 are in contact.

[0032] In this optional embodiment, the step surfaces of the first step structure 1022 and the second step structure 2025 form a rigid stop at the moment of engagement, directly transmitting the axial thrust of the fan blade structure 202 to the power output shaft 102. This avoids deformation or loosening of the elastic buckle 2023 due to bearing the load alone, thereby improving the axial positioning accuracy and connection rigidity, and reducing the wear of the elastic buckle 2023. As a result, the fan cover body 201 remains stable after multiple disassemblies and reassemblies.

[0033] Optionally, the shroud 200 includes a mounting base 2013 having a first through channel 2014; the hub 2021 includes a blade connecting hub 20211 and a bushing 20212, the bushing 20212 being coaxially connected to the blade connecting hub 20211; the bushing 20212 passes through the mounting base 2013 via the first through channel 2014 and is movable relative to the mounting base 2013; a portion of the channel 2022 passes through the bushing 20212, and another portion of the channel 2022 is disposed within the blade connecting hub 20211.

[0034] Specifically, such as Figure 1 As shown, the wind shield 200 includes a front mesh cover 2011 and a rear mesh cover 2012, which are detachably connected; wherein, as Figure 4 As shown, the rear grille 2012 has a mounting base 2013 inside, and the mounting base 2013 has a first through channel 2014 along the axial direction of the power output shaft 102; in the structure of the wheel hub 2021, as Figure 3 As shown, the bushing 20212 is coaxially connected to the blade connecting hub 20211; the bushing 20212 passes through the mounting base 2013 through the first through channel 2014 and is movable relative to the mounting base 2013; and the rear half of the channel 2022 passes through the bushing 20212, and the front half of the channel 2022 passes through the blade connecting hub 20211.

[0035] In this optional embodiment, the radial limiting of the mounting base 2013 on the bushing 20212 prevents excessive shaking of the hub 2021, ensuring that the power output shaft 102 can quickly pass into the channel 2022 of the hub 2021, thereby improving installation efficiency.

[0036] Optionally, the hub 2021 also includes a baffle 2024, which is detachably disposed at one end of the bushing 20212 passing through the first through channel 2014, and at least a portion of the projection of the baffle 2024 on the bushing 20212 is located outside the contour range of the channel 2022.

[0037] Specifically, the baffle 2024 is detachably mounted at one end of the bushing 20212 that passes through the first through channel 2014, and the connection between the two is including but not limited to screw connection or snap-fit ​​connection; such as Figure 3 As shown, the baffle 2024 is snapped onto the rear end of the bushing 20212, and the projection of the baffle 2024 on the bushing 20212 is outside the contour range of the channel 2022.

[0038] In this optional embodiment, when the wind shield body 201 is installed or removed, the presence of the baffle 2024 can prevent the bushing 20212 from detaching from the mounting base 2013, thus playing a limiting role; at the same time, the baffle 2024 can be replaced individually when worn or disassembled, thereby achieving axial safe positioning of the hub 2021 with the minimum number of parts, extending the life of the quick-release mechanism and reducing maintenance costs.

[0039] Optionally, the air outlet end of the shroud body 201 is provided with a second through channel 20111 along the axial direction of the power output shaft 102; the pushing mechanism 203 includes a pressing plate 2031, a pushing member 2032 and a first elastic member 2033; the first elastic member 2033 connects the pressing plate 2031 and the air outlet end of the shroud body 201; one end of the pushing member 2032 is connected to the pressing plate 2031, and the other end passes through the second through channel 20111; the hub 2021 is located on the moving path of the pushing member 2032.

[0040] Specifically, such as Figure 5 As shown, a second through channel 20111 is provided at the middle position of the front end face of the front cover 2011 along the axial direction of the power output shaft 102; in the structure of the pushing mechanism 203, the number of the first elastic element 2033 is not specifically limited, but is determined according to actual needs; such as Figure 5 As shown, the first elastic element 2033 is a spring, which is connected between the front end face of the pressing plate 2031 and the front cover 2011, thereby realizing the pressing and resetting of the pressing plate 2031; the front end of the pushing element 2032 is connected to the pressing plate 2031, and the rear end passes through the second through channel 20111; the hub 2021 is located on the moving path of the pushing element 2032, and the end of the pushing element 2032 facing the hub 2021 has a clearance groove to avoid the power output shaft 102 passing through the end of the hub 2021.

[0041] In this optional embodiment, when the user presses the pressing plate 2031, the pushing member 2032 directly pushes the hub 2021 under the guidance of the second through channel 20111, so that the elastic buckle 2023 engages with the first slot structure 1021; after the pressing plate 2031 is released, the first elastic member 2033 automatically resets and drives the pushing member 2032 to retract; thus, the pushing mechanism 203 is a purely mechanical operation, which not only does not require additional energy, but is also simple to operate and can quickly achieve the engagement of the power output shaft 102 and the hub 2021.

[0042] Optionally, the front end face of the shroud body 201 has one of the two structures: a guide post and a guide groove, and the pressing plate 2031 has the other of the two structures: a guide post and a guide groove. The guide post is slidably disposed in the guide groove structure along the axial direction of the power output shaft 102.

[0043] Specifically, the front end face of the front mesh cover 2011 has a guide post, and the pressing plate 2031 has a guide groove structure that cooperates with the guide post. After the pushing mechanism 203 is installed on the front mesh cover 2011, the guide post is slidably disposed in the guide groove structure along the axial direction of the power output shaft 102.

[0044] In this optional embodiment, when the user presses the pressing plate 2031, the guide post slides linearly in the guide groove, providing axial freedom for the pressing plate 2031 and the pushing member 2032. This eliminates circumferential deflection and radial sway during the pressing process, ensuring that the pushing member 2032 always applies force directly to the hub 2021, and preventing the elastic buckle 2023 from getting stuck or worn due to lateral compression.

[0045] Optionally, one of the shroud body 201 and the shroud 101 is provided with a second slot structure 103, and the other of the shroud body 201 and the shroud 101 is provided with a first locking block 2015; when the shroud body 201 and the shroud 101 rotate relative to each other, the first locking block 2015 is adapted to enter or exit the second slot structure 103.

[0046] It should be noted that, in order to enable the first card block 2015 to smoothly enter the second card slot structure 103, the second card slot structure 103 has a clearance opening that communicates with the inlet of the second card slot structure 103 to avoid the first card block 2015; or, the first card block 2015 has a clearance groove to avoid the inner wall of the second card slot structure 103.

[0047] Specifically, such as Figure 6 As shown, the mounting base 2013 of the rear mesh cover 2012 is provided with a first locking block 2015; as Figure 2 As shown, the front end of the cover 101 is provided with a second slot structure 103; when the wind cover body 201 and the cover 101 rotate relative to each other, the first locking block 2015 can enter or exit the second slot structure 103.

[0048] In this optional embodiment, the first locking block 2015 and the second locking slot structure 103 can realize the quick disassembly of the wind cover 200 and the head 100. The user can easily disconnect the wind cover 200 from the head 100 without tools, thereby facilitating the removal of the wind cover 200.

[0049] Optionally, the head unit 100 also includes a locking device 104, which is disposed on the cover 101 and is used to lock or unlock the cover 101 and the fan cover body 201.

[0050] Specifically, such as Figure 7 , 8 As shown, the mounting base 2013 of the rear cover 2012 is provided with a receiving groove 2016; the locking device 104 includes a pull rod 1041 and a second elastic element 1042; the pull rod 1041 is slidably connected to the cover 101; the second elastic element 1042 is disposed on the cover 101 and contacts the pull rod 1041 along the sliding direction of the pull rod 1041; when the pull rod 1041 is located in the receiving groove 2016, the second elastic element 1042 can be in an uncompressed state or a semi-compressed state to prevent the pull rod 1041 from exiting the receiving groove 2016, thereby restricting the relative rotation of the cover body 201 and the cover 101; when the pull rod 1041 exits the receiving groove 2016, the pull rod 1041 compresses the second elastic element 1042, and the second elastic element 1042 can accumulate elastic potential energy.

[0051] In this optional embodiment, when it is necessary to rotate the shroud 200 and the head 100 relative to each other, the operator can apply force to the pull rod 1041 so that the pull rod 1041 exits the receiving groove 2016 and compresses the second elastic element 1042. At this time, the shroud 200 and the head 100 can rotate relative to each other smoothly, thereby facilitating the loading and unloading of the shroud 200. When the pull rod 1041 is aligned with the receiving groove 2016, the operator can release the force applied to the pull rod 1041, and the second elastic element 1042 resets to drive the pull rod 1041 to extend into the receiving groove 2016. The elastic effect of the second elastic element 1042 can make the pull rod 1041 stably held in the receiving groove 2016. This stable holding state allows the pull rod 1041 to firmly restrict the relative rotation of the shroud 200 and the head 100. Even when the fan unit vibrates during operation, the elasticity of the second elastic element 1042 can effectively buffer the impact of vibration on the position of the pull rod 1041, ensuring that the pull rod 1041 will not easily detach from the receiving groove 2016, thereby effectively avoiding loosening caused by vibration.

[0052] Furthermore, such as Figure 9 As shown, the locking device 104 also includes a wrench 1043, which is connected to the lever 1041.

[0053] Specifically, the wrench 1043 can be installed on the outer wall or the tail of the lever 1041, and the connection method between the two includes, but is not limited to, adhesive bonding, snap-fitting, or screw connection. There are no restrictions here, and it depends on the actual needs.

[0054] In this embodiment, the wrench 1043 provides a larger operating area and a more comfortable grip, allowing the operator to apply greater force when pulling or pushing the lever 1041, thereby making it easier to complete the locking and unlocking operations. Furthermore, the presence of the wrench 1043 can also protect the lever 1041 to some extent, avoiding damage that may result from directly applying force to the lever 1041 and extending its service life.

[0055] Meanwhile, when the pull rod 1041 is inside the cover 101, the front end of the pull rod 1041 protrudes through the front face of the cover 101, the wrench 1043 engages with the pull rod 1041, and the wrench 1043 can extend to the outside through the slide rail opened on the cover 101. The operator can drive the pull rod 1041 to move by using the external wrench 1043 without directly contacting the pull rod 1041 itself, thereby reducing the difficulty of operation.

[0056] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A fan device, characterized in that, The device includes a head unit (100) and a fan shroud (200); the head unit (100) includes a shroud (101) and a power output shaft (102) that rotates relative to the shroud (101), the power output shaft (102) having a first connection structure; the fan shroud (200) includes a shroud body (201), a fan blade structure (202), and a drive mechanism (203); the fan shroud body (201) is rotatably engaged with the shroud (101); the fan blade structure (202) includes a hub (2021). The hub (2021) is movably disposed on the shroud body (201). The hub (2021) has a channel (2022) through which the power output shaft (102) passes and a second connecting structure that cooperates with the first connecting structure. The pushing mechanism (203) is movably disposed on the shroud body (201) and is used to drive the hub (2021) to move relative to the power output shaft (102) when subjected to force, so that the first connecting structure and the second connecting structure are engaged.

2. The fan device according to claim 1, characterized in that, The first connecting structure is a first slot structure (1021) disposed on the circumferential sidewall of the power output shaft (102); the second connecting structure is an elastic buckle (2023) disposed on the hub (2021), and the engaging part of the elastic buckle (2023) is located on the moving path of the power output shaft (102); when the engaging part of the elastic buckle (2023) is located in the first slot structure (1021), the first connecting structure and the second connecting structure are in a snap-fit ​​state.

3. The fan device according to claim 2, characterized in that, The edges of the first slot structure (1021) have rounded corners or chamfered corners; And / or, the first slot structure (1021) is arranged circumferentially around the power output shaft (102); a portion of the power output shaft (102) has a non-circular cross-sectional shape that matches the inner wall of the corresponding channel (2022).

4. The fan device according to claim 2 or 3, characterized in that, The power output shaft (102) has a first step structure (1022) on its circumferential sidewall, with the step surface of the first step structure (1022) facing the first slot structure (1021); the hub (2021) has a second step structure (2025), which is located inside the channel (2022) or at the end of the channel (2022) near the hood (101), with the step surface of the second step structure (2025) facing the hood (101); when the first connecting structure and the second connecting structure are in a snap-fit ​​state, the step surfaces of the first step structure (1022) and the second step structure (2025) are in contact.

5. The fan device according to claim 1, characterized in that, The wind shield (200) includes a mounting base (2013) having a first through channel (2014); the hub (2021) includes a blade connecting hub (20211) and a bushing (20212), the bushing (20212) being coaxially connected to the blade connecting hub (20211); the bushing (20212) passes through the mounting base (2013) through the first through channel (2014) and is movable relative to the mounting base (2013); a portion of the channel (2022) passes through the bushing (20212), and another portion of the channel (2022) is disposed within the blade connecting hub (20211).

6. The fan device according to claim 5, characterized in that, The hub (2021) further includes a baffle (2024), which is detachably disposed at one end of the bushing (20212) passing through the first through channel (2014), and at least a portion of the projection of the baffle (2024) on the bushing (20212) is located outside the outline of the channel (2022).

7. The fan device according to claim 1, characterized in that, The air outlet end of the shroud body (201) is provided with a second through channel (20111) along the axial direction of the power output shaft (102); the pushing mechanism (203) includes a pressing plate (2031), a pushing member (2032) and a first elastic member (2033); the first elastic member (2033) connects the pressing plate (2031) and the air outlet end of the shroud body (201); one end of the pushing member (2032) is connected to the pressing plate (2031), and the other end passes through the second through channel (20111); the hub (2021) is located on the moving path of the pushing member (2032).

8. The fan device according to claim 7, characterized in that, The front end face of the shroud body (201) has one of the two structures: a guide post and a guide groove. The pressing plate (2031) has the other of the two structures: a guide post and a guide groove. The guide post is slidably disposed in the guide groove structure along the axial direction of the power output shaft (102).

9. The fan device according to claim 1, characterized in that, One of the shroud body (201) and the shroud (101) is provided with a second slot structure (103), and the other of the shroud body (201) and the shroud (101) is provided with a first locking block (2015); when the shroud body (201) and the shroud (101) rotate relative to each other, the first locking block (2015) is adapted to enter or exit the second slot structure (103).

10. The fan device according to claim 1, characterized in that, The head unit (100) also includes a locking device (104), which is disposed on the shroud (101) and is used to lock or unlock the shroud (101) and the fan cover body (201).

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