Fan blade structure capable of being quickly assembled and disassembled

Abstract

The utility model discloses a fan blade structure capable of being quickly assembled and disassembled, which comprises a fan blade mounting base, a plurality of fan blade slots are formed in the circumferential outer wall of the fan blade mounting base at intervals, locking grooves are formed in the fan blade slots, and guide shaft holes penetrate through the tops of the locking grooves; the fan blades are inserted into the fan blade slots, and locking grooves are formed in the surfaces of the inner ends of the fan blades; a rotating shaft is inserted into the guide shaft hole, one end of the rotating shaft extends into the locking groove and is sleeved with a rotating locking piece, and the other end of the rotating shaft extends out of the top wall of the locking groove and is sleeved with a knob; the rotary locking piece can synchronously rotate along with rotation of the rotary knob and move in the axial direction so that the rotary locking piece can be embedded into the locking groove of the fan blade, and the fan blade can be locked. The rotary locking piece can synchronously rotate and move in the axial direction through the synergistic effect of the rotary shaft and the rotary knob, and then the rotary locking piece can be firmly embedded into the locking groove of the fan blade. And the bolts are inserted into the pin shaft holes through vertical movement, so that each fan blade is locked more stably while the disassembly and assembly operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of ceiling fan accessories, in particular to a blade structure that can be quickly installed and disassembled. Background Art

[0002] Ceiling fans are common electrical appliances in daily life, and their main function is to generate air flow through the rotation of the blades, achieving the effects of cooling and air circulation. Currently, ceiling fans on the market usually install the blades on the fan body by fixing them with screws. Although this installation method is relatively traditional and has a simple structure, there are also many problems.

[0003] Firstly, the installation process of the blades is cumbersome, and it is necessary to manually tighten the screws one by one. This not only increases the installation time but also has certain requirements for the operation skills of workers. If not careful, it may lead to the screws not being tightened or being over-tightened, affecting the stability of the ceiling fan. Secondly, the screw fixation method is prone to loosening during long-term use. Especially after the ceiling fan rotates at high speed or is used for a long time, the loosening of the screws will cause the instability of the blades, and then lead to a series of problems with the ceiling fan. For example, due to the high-speed rotation of the ceiling fan, any small displacement of the blades will be amplified, destroying the balance of the ceiling fan, directly resulting in an increase in noise, generating vibration sounds or friction sounds, and affecting the user's comfort experience. In addition, the instability of the blades will also exacerbate the wear of the ceiling fan. The motor bears uneven loads during operation, resulting in increased wear of the bearings, motor, and connection parts, shortening the service life of the ceiling fan, and even causing equipment failures. More seriously, the instability of the blades will bring potential safety hazards. The loosening or falling off of the screws will cause the blades to break away from the fan body during high-speed rotation, becoming dangerous objects. Especially in indoor or public places, once the blades fall off, it may cause serious damage to people or property.

[0004] In addition, since ceiling fans are usually installed at high places, it is extremely inconvenient to regularly check or maintain and clean the fixed state of the blades. It is not easy for users to operate by themselves and requires professional personnel for maintenance, increasing the use and maintenance costs.

[0005] Therefore, the existing installation method of fixing the blades of ceiling fans with screws has problems such as complex operation, insufficient stability, and inconvenient maintenance in actual use, and needs to be further optimized and improved. Content of the Utility Model

[0006] The purpose of the utility model is to provide a blade structure that can be quickly installed and disassembled, which is relatively easy and fast during the installation and repair of ceiling fans, and does not require tightening screws one by one, effectively ensuring the connection stability of the blades.

[0007] To achieve the above purpose, the utility model adopts the following scheme: A blade structure that can be quickly installed and disassembled, including:

[0008] A fan blade mounting base, on the circumferential outer wall of which a plurality of fan blade slots are arranged at intervals, and each fan blade slot is provided with a corresponding locking groove with a cavity inside. A guiding shaft hole penetrates through the top of the locking groove.

[0009] A number of fan blades, the inner ends of each fan blade are inserted into the corresponding fan blade slots and extend into the corresponding locking grooves. The inner end surface of the fan blade is provided with a locking groove coaxial with the guiding shaft hole.

[0010] A rotating shaft, which is movably inserted into each of the guiding shaft holes, with one end extending into the locking groove and the other end extending outside the top wall of the locking groove.

[0011] Knobs, which are respectively sleeved on one end of each rotating shaft located outside the top of the locking groove and are connected to the rotating shaft through a collar sleeved on the end of the rotating shaft.

[0012] Rotating locking parts, which are respectively movably sleeved on one end of each rotating shaft extending into the locking groove, can rotate synchronously with the rotation of the knob and move axially along the rotating shaft, so as to be embedded into the locking grooves of the fan blades, realizing the locking of the fan blades.

[0013] In the above solution, through the coordinated work of the fan blade slots, rotating shafts, knobs and rotating locking parts, the cumbersome problem of fixing fan blades with traditional screws is solved, and convenient installation and disassembly are realized. Through the design of the knobs and rotating locking parts, the fan blades can be quickly installed and disassembled without tools, avoiding the multi-step operations of screw fixing, improving the efficiency of fan blade installation and maintenance, and being particularly convenient during replacement or maintenance. The design of the rotating locking parts for locking or releasing the fan blades with one key ensures the stable installation of the fan blades and reduces the possibility of loosening or falling off.

[0014] As a preferred solution of the present utility model, the rotating locking part includes a rotating tube sleeved on the end of the rotating shaft extending into the locking groove and moving up and down with the rotation of the rotating shaft. On the circumferential outer wall of the bottom of the rotating tube, there is a locking ring surrounding the rotating tube and capable of being embedded into the corresponding locking groove. The locking ring is precisely matched with the locking groove of the fan blade. By driving the locking ring by the rotating tube to be embedded into the fan blade, it is ensured that the fan blade can be firmly locked in place, avoiding loosening caused by vibration or long-term use. A plurality of upwardly protruding teeth are arranged on the top surface of the locking ring. On the top wall of the inner cavity of the locking groove above the teeth, there are convex platforms corresponding to the teeth. The convex platforms are arranged around the guiding shaft hole, and inclined surfaces with the same direction are arranged at the corners of each convex platform. Through the cooperative design of the teeth and the convex platforms, when the rotating tube rotates, it is ensured that the locking ring can accurately be inserted into the locking groove on the fan blade each time it is locked, improving the reliability of the operation. A downwardly extending insert piece is provided at the bottom of the knob, and a synchronous slot is provided at the top of the rotating tube to accommodate the insert piece to be inserted, so as to realize the synchronous rotation of the rotating tube with the knob. A first return spring is sleeved on the rotating shaft between the bottom of the knob and the surface of the top wall of the locking groove.

[0015] As a further solution of the present utility model, a positioning mechanism is provided on the knob, which can lock the rotating state of the knob when the locking ring is embedded in the locking groove. This positioning mechanism can effectively prevent the knob from accidentally rotating after the locking ring is embedded in the locking groove, ensure the continuous stability of the locked state, effectively avoid the loosening of the locked state, and improve the safety during the operation of the entire ceiling fan.

[0016] As a preferred solution of the present utility model, the positioning mechanism includes positioning grooves respectively provided on the outer wall surfaces of the tops of the respective locking grooves. On each of the knobs, a ball groove with an opening at the bottom is provided. A ball that can move up and down is provided in the ball groove. A second return spring is provided between the tail of the ball and the top wall of the ball groove to keep the bottom end of the ball moving downward and extending out of the bottom opening of the ball groove. The bottom end of the ball is hemispherical and can slide along the outer wall surface of the top of the locking groove as the knob rotates. When the knob drives the locking ring to rotate and is embedded in the locking groove, the bottom end of the ball is snapped into the positioning groove.

[0017] Through the above solution, the positioning mechanism is optimized. By using the combination of the ball groove, the ball and the return spring, the reliability of the positioning function is improved. Among them, the cooperation between the hemispherical ball and the positioning groove enables the knob to be accurately snapped in each time it rotates in place, greatly improving the accuracy of the knob locking. In addition, through the action of the return spring, it is ensured that the ball can always reliably extend and be snapped into the positioning groove, enhancing the stability in the locked state. All in all, the optimized design of the positioning mechanism enables users to more conveniently perceive whether the locking is in place, reducing the uncertainty in operation.

[0018] As a further solution of the present utility model, a vertical hole penetrating up and down is provided in the center of the rotating shaft. A bolt that can move up and down is provided in the vertical hole. A pin shaft hole is provided through the center of the locking groove. A third return spring is sleeved on the bolt located in the vertical hole to keep the bottom end of the bolt extending downward out of the bottom of the vertical hole and inserted into the lower pin shaft hole. The top of the bolt passes through and extends out of the top of the collar. The bolt and the rotary locking member work together to provide a dual locking system for the fan blade locking, making the fixation of the fan blade more reliable, further improving the locking safety of the fan blade, and reducing the risk of loosening or falling off caused by vibration or impact. And the bolt is inserted into the pin shaft hole through vertical movement, with simple operation and convenient for quick installation and disassembly, especially saving a great deal of time when the fan blade needs to be frequently replaced or maintained.

[0019] As a preferred embodiment of the present utility model, a first annular platform is provided around the inner wall of the circumference at the bottom end of the vertical hole. A second annular platform is provided around the outer wall of the circumference near the bottom of the bolt. The bottom surface of the second annular platform abuts against the top surface of the first annular platform. A third annular platform is provided around the inner wall of the circumference near the top of the collar. The bottom end of the third return spring abuts against the top surface of the second annular platform, and the top of the third return spring abuts against the bottom surface of the third annular platform at the top of the collar. The cooperation of the upper and lower annular platforms and the return spring ensures that the bolt can always maintain the correct locking position, further improving the convenience of locking.

[0020] As a preferred embodiment of the present utility model, a jack coaxial with the guide shaft hole and communicating with the locking groove is provided through the bottom of the fan blade mounting base. The bottom end of the bolt is hemispherical and passes through the pin shaft hole and then inserts into the jack. After the bolt extends into the jack, an additional locking point is provided, further reducing the risk of the fan blade falling off and improving the safety of the ceiling fan.

[0021] As a preferred embodiment of the present utility model, the knob includes a rotating cover. A counterbore penetrating up and down is provided in the center of the rotating cover. The top end of the rotating shaft extends into the counterbore and abuts against the bottom surface of the counterbore. The bottom end of the collar is inserted into the counterbore, and the inner wall thereof is sleeved with the outer wall of the top end of the rotating shaft through interference fit. The counterbore of the rotating cover is closely fitted with the top end of the rotating shaft, preventing the knob from loosening during use and ensuring the stability of the knob. Symmetrically arranged operating ears are connected to the outer wall of the circumference of the rotating cover. The operating ears enable the user to rotate the knob more conveniently, providing a better operating experience. The ball slot is provided at the bottom of one of the operating ears. The insertion piece extends symmetrically downward from the bottom of the counterbore and passes through the guide shaft hole. The mutual cooperation design of the synchronous slot and the insertion piece ensures that the synchronous rotation between the knob and the locking ring is smoother.

[0022] As a preferred embodiment of the present utility model, the top end of the bolt passes through the center of the third annular platform, and an anti-detachment end with a diameter larger than the inner hole diameter of the collar is provided at the end extending outside the collar. By adding an anti-detachment end at the top end of the bolt, it is ensured that the bolt will not accidentally fall off during use, further enhancing the safety.

[0023] As a preferred embodiment of the present utility model, a clamping boss is provided around the outer wall of the circumference at the bottom end of the rotating shaft. A synchronous slot capable of accommodating the clamping boss is provided at the bottom end of the rotating tube. Vertical surfaces capable of cooperating with each other are respectively provided on the side surface of the clamping boss and the side surface of the synchronous slot. Through the mutual cooperation of the vertical surfaces, the rotating shaft and the rotating tube rotate synchronously. The cooperation of the clamping boss and the synchronous slot enables the rotating shaft and the rotating tube to rotate precisely synchronously, ensuring that the locking member can be smoothly inserted into the locking groove and improving the operation reliability.

[0024] In summary, the utility model has the following beneficial effects compared to the prior art: compared to the existing method of fixing the fan blades by screwing the screws one by one, the utility model inserts the inner end of the fan blade into the corresponding locking groove, utilizes the synergistic effect of the rotating shaft and the knob, and makes the rotating locking piece rotate synchronously and move axially, and then firmly embeds into the locking groove of the fan blade, and cooperates with the latch to insert the pin shaft hole through vertical movement, so as to achieve a stable locking effect. This not only simplifies the cumbersome operation of screwing the screws one by one, but also greatly improves the efficiency of disassembly and assembly of the fan blade. In addition, the locking ring on the rotating locking piece cooperates with the boss in the locking groove through the convex teeth, so that the locking ring can be smoothly embedded in the locking groove of the fan blade when rotating, ensuring that the locking of each fan blade is more stable, and avoiding the problem of the fan blade shaking or falling off due to loose screws. At the same time, the insert at the bottom of the knob cooperates with the synchronous slot at the top of the rotating tube to realize the synchronous rotation of the knob and the rotating tube, further improving the convenience and accuracy of the operation, and facilitating the assembly operation in production.

[0025] The utility model further enhances the locking effect of the fan blades through the positioning mechanism. When the locking ring is inserted into the locking groove of the fan blade, the pin in the pin groove automatically snaps into the positioning groove, preventing the knob from accidentally loosening or reversing due to external force in the locked state, ensuring the long-term stability of the locking effect. The design of the reset spring enables each component to quickly return to the initial state after the operation is completed, facilitating repeated disassembly and assembly of the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional view of the utility model and an enlarged view of a local area in the figure.

[0027] Figure 2 It is one of the cross-sectional views of the utility model, and an enlarged view of a local area in the figure.

[0028] Figure 3 This is the second cross-sectional view of the utility model and an enlarged view of a local area in the figure.

[0029] Figure 4 This is one of the exploded views of the present invention, and an enlarged view of a local area in the figure.

[0030] Figure 5 for Figure 4 Magnified view at A in the middle.

[0031] Figure 6 This is the second exploded view of the utility model and an enlarged view of a local area in the figure.

[0032] Figure 7 for Figure 6 Magnified view at B.

[0033] Figure 8 is Figure 6 an enlarged view of location C in

[0034] Figure 9 a sectional view of the disassembled state of the present utility model, and an enlarged view of a partial area in the figure.

[0035] Figure 10 is a schematic diagram of the state where after the rotary locking member of the present utility model moves downward along the axis, the locking ring is embedded in the locking groove, and at the same time the bolt passes through the pin shaft hole and is inserted into the jack.

[0036] Figure 11 is a schematic diagram of the state where after the rotary locking member of the present utility model moves upward along the axis, the locking ring disengages from the locking groove, and at the same time the bolt also withdraws from the pin shaft hole and the jack.

[0037] Explanation of reference numerals in the drawings: 1. Blade mounting base; 2. Blade; 3. Rotating shaft; 4. Knob; 5. Rotary locking member; 6. First return spring; 7. Positioning mechanism; 11. Blade slot; 12. Locking groove; 13. Guide shaft hole; 14. Jack; 21. Locking groove; 22. Pin shaft hole; 23. Guide surface; 31. Collar; 32. Vertical hole; 33. Bolt; 34. Third return spring; 35. First annular platform; 36. Second annular platform; 37. Third annular platform; 38. Clamping boss; 39. Anti-disengagement end; 41. Insert piece; 42. Ball groove; 43. Ball; 44. Second return spring; 45. Rotating cover; 46. Counterbore; 47. Operating ear; 51. Rotating tube; 52. Locking ring; 53. Convex tooth; 54. Boss; 55. Inclined surface; 56. Synchronous slot; 57. Synchronous groove; 58. Upright surface; 71. Positioning groove. Detailed implementation manners

[0038] The following specific implementation content provides various different embodiments or examples for implementing the present utility model. Of course, these are only embodiments or examples and are not intended to be restrictive. In addition, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the present invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0039] In addition, spatial-related terms may be used, such as "below", "lower side", "from the inside to the outside", "above", "upper side" and similar terms. These relational terms are for facilitating the description of the relationship between some elements or features and other elements or features in the drawings. These spatial relationship terms include different orientations of the device during use or operation, as well as the orientations described in the drawings. The device may be rotated 90 degrees or to other orientations, and the spatial-related adjectives used therein can be similarly interpreted. Therefore, it should not be construed as a limitation to the present invention. The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0040] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments: As Figures 1 to 11 shown, a fan blade structure that can be quickly assembled and disassembled includes a fan blade mounting base 1 in the shape of a disc. A plurality of fan blade slots 11 for inserting fan blades 2 are arranged at intervals on the circumferential outer wall thereof. Each fan blade slot 11 is provided with a corresponding locking groove 12 with a cavity inside. The inner ends of the fan blades 2 are inserted into the corresponding fan blade slots 11 and extend into the corresponding locking grooves 12. A guiding shaft hole 13 penetrates through the top of the locking groove 12, and a jack 14 penetrating through the bottom of the fan blade mounting base 1 is provided at the bottom of the locking groove 12. The jack 14 and the corresponding guiding shaft hole 13 are coaxial. A locking groove 21 coaxial with the guiding shaft hole 13 is provided on the inner end surface of the fan blade 2. A rotating shaft 3 is movably inserted into each of the guiding shaft holes 13. One end of the rotating shaft 3 extends into the locking groove 12, and the other end extends out of the top of the fan blade mounting base 1 above the locking groove 12. A knob 4 is sleeved on one end of the rotating shaft 3 extending out of the top of the fan blade mounting base 1 above the locking groove 12. The knob 4 is connected to the rotating shaft 3 through a collar 31 sleeved on the top end of the rotating shaft 3. A rotating locking member 5 is sleeved on one end of the rotating shaft 3 extending into the locking groove 12. A downward-extending insertion piece 41 is provided at the bottom of the knob 4 to drive the rotating locking member 5 to rotate synchronously. During the process of synchronously rotating with the knob 4, the rotating locking member 5 moves downward along the axial direction of the rotating shaft 3, so as to be embedded into the locking groove 21 of the fan blade 2, realizing the locking of the fan blade 2.

[0041] Among them, as Figures 2 to 11As shown, the rotation locking member 5 includes a rotating tube 51 sleeved on the end of the rotating shaft 3 extending into the locking groove 12 and capable of moving up and down as the rotating shaft 3 rotates. On the circumferential outer wall at the bottom of the rotating tube 51, there is a locking ring 52 surrounding the rotating tube 51 and capable of being embedded in the corresponding locking groove 21. On the circumferential outer wall around the bottom end of the rotating shaft 3, there is a clamping boss 38. At the bottom end of the rotating tube 51, there is a synchronous groove 57 capable of accommodating the clamping boss 38. On the side surfaces of the clamping boss 38 and the synchronous groove 57, there are vertical surfaces 58 capable of cooperating with each other. Through the cooperation of the vertical surfaces 58, the rotating shaft 3 and the rotating tube 51 rotate synchronously. It should be emphasized that along the top surface of the locking ring 52, there are a plurality of upwardly protruding convex teeth 53. On the top wall of the inner cavity of the locking groove 12 above the convex teeth 53, there are corresponding bosses 54. The bosses 54 are arranged around the guiding shaft hole 13. At the corners of each boss 54, there are inclined surfaces 55 inclined in the same direction. At the top of the rotating tube 51, there is a synchronous slot 56 for accommodating the insertion of the insertion piece 41, so as to further realize the synchronous rotation of the rotating tube 51 with the knob 4. A first return spring 6 is sleeved on the rotating shaft 3 between the bottom of the knob 4 and the top wall surface of the locking groove 12. When the knob 4 drives the locking ring 52 to rotate, the convex teeth 53 slide along the inclined surface 55, thereby pushing the rotating tube 51 and the locking ring 52 to move downward along the axis and finally being embedded in the locking groove 21.

[0042] In addition, a vertically penetrating vertical hole 32 is provided in the center of the rotating shaft 3. On the inner circumferential wall at the bottom end of the vertical hole 32, there is a first annular platform 35. In the vertical hole 32, there is a pin 33 capable of moving up and down. On the circumferential outer wall around the pin 33 near the bottom, there is a second annular platform 36. The bottom surface of the second annular platform 36 abuts against the top surface of the first annular platform 35. In the center of the locking groove 21, there is a pin shaft hole 22 penetrating through. A third return spring 34 is sleeved on the pin 33 located in the vertical hole 32 and can keep the bottom end of the pin 33 extending downward out of the bottom of the vertical hole 32 and inserted into the lower pin shaft hole 22. The bottom end of the pin 33 is hemispherical and passes through the pin shaft hole 22 and then is inserted into the jack 14. On the inner circumferential wall around the collar 31 near the top, there is a third annular platform 37. The bottom end of the third return spring 34 abuts against the top surface of the second annular platform 36, and the top of the third return spring 34 abuts against the bottom surface of the third annular platform 37 at the top of the collar 31. The top of the pin 33 passes through and extends out of the top of the collar 31, and at the top end of the pin 33 at the end extending out of the collar 31, there is an anti-detachment end 39 with a diameter larger than the inner hole diameter of the third annular platform 37.

[0043] As Figures 1 to 11As shown, the knob 4 includes a rotating cover 45, and a countersunk hole 46 is provided in the center of the rotating cover 45, which runs through the top and bottom. The top of the rotating shaft 3 extends into the countersunk hole 46 and abuts against the bottom surface of the countersunk hole 46. The bottom end of the collar 31 is inserted into the countersunk hole 46, and its inner wall is sleeved with the outer wall of the top of the rotating shaft 3 through interference fit. A symmetrically arranged operating ear 47 is connected to the circumferential outer wall of the rotating cover 45. The insert 41 extends symmetrically downward from the bottom of the countersunk hole 46 and passes through the guide shaft hole 13 and is inserted into the synchronous slot 56. It should be noted that the movable distance of the insert 41 in the synchronous slot 56 is greater than the moving distance of the locking ring 52. In this way, when the locking ring 52 moves axially up and down with the rotating tube 51, the rotating tube 51 will not be out of the rotation control of the knob 4. The first reset spring 6 is sleeved on the periphery of the insert 41, and the top end abuts against the top of the inner wall of the rotating cover 45, and the bottom end abuts against the surface of the fan blade mounting base 1.

[0044] When the inner end of the fan blade 2 is inserted into the corresponding fan blade slot 11 and extends into the corresponding locking groove 12, the end of the fan blade 2 is provided with an inclined guide surface 23, and the bottom end of the latch 33 is pushed upward by the guide surface 23, passes over the surface of the inner end of the fan blade 2 and enters the locking groove 21. When the locking groove 21 completely coincides with the axis of the guide shaft hole 13, the latch 33 is inserted into the pin shaft hole 22 under the action of the third reset spring 34, and finally snaps into the jack 14 at the bottom of the locking groove 12. Then, the operating ear 47 is rotated to rotate the rotating cover 45, and the rotating tube 51 and the locking ring 52 are rotated synchronously. At this time, the convex tooth 53 slides along the inclined surface 55, thereby pushing the rotating tube 51 and the locking ring 52 to move downward along the axial direction. After the knob 4 is fully rotated into place, the locking ring 52 is finally embedded in the locking groove 21, and the fan blade 2 is completely locked on the fan blade mounting base 1.

[0045] In addition, in order to prevent the knob 4 from accidentally rotating in the opposite direction after the locking ring 52 is inserted into the locking groove 21, so that the fan blade 2 cannot be locked by the rotation locking member 5 and escapes from the locking groove 12, a positioning mechanism 7 is provided on the knob 4, which can lock the rotation state of the knob 4 when the locking ring 52 is inserted into the locking groove 21. Specifically: the positioning mechanism 7 includes positioning grooves 71 respectively arranged on the outer wall surface of the fan blade mounting base 1 at the top of each of the locking grooves 12, and a ball groove 42 with an opening at the bottom is provided on one of the operating ears 47 of each of the knobs 4, and a ball 43 that can move up and down is provided in the ball groove 42, and a second return spring 44 that can keep the bottom end of the ball 43 moving downward and extending out of the bottom opening of the ball groove 42 is provided between the tail of the ball 43 and the top wall of the ball groove 42, and the bottom end of the ball 43 is hemispherical and can slide along the outer wall surface of the top of the locking groove 12 as the knob 4 rotates, and when the knob 4 drives the locking ring 52 to rotate and embed into the locking groove 21, the bottom end of the ball 43 is stuck in the positioning groove 71.

[0046] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A fan blade structure that can be quickly assembled and disassembled, characterized in that: Included are: A fan blade mounting base (1) has a plurality of fan blade slots (11) arranged at intervals on its circumferential outer wall, each fan blade slot (11) is provided with a corresponding locking slot (12) having a hollow interior, and a guide shaft hole (13) passing through the top of the locking slot (12); A plurality of fan blades (2), the inner end of each fan blade (2) being inserted into a corresponding fan blade slot (11) and extending into a corresponding locking groove (12), and the inner end surface of the fan blade (2) being provided with a locking groove (21) coaxial with the guide shaft hole (13); A rotating shaft (3), the rotating shaft (3) being movably inserted into each of the guide shaft holes (13), with one end extending into the locking groove (12) and the other end extending to the outside of the top wall of the locking groove (12); The knobs (4) are respectively sleeved on one end of each of the rotating shafts (3) located outside the top of the locking groove (12), and are connected to the rotating shafts (3) via a sleeve (31) sleeved on the end of the rotating shafts (3); The rotary locking member (5) is movably sleeved on one end of each rotary shaft (3) extending into the locking groove (12), and can rotate synchronously with the rotation of the knob (4) and move axially along the rotary shaft (3), thereby being embedded in the locking groove (21) of the fan blade (2) to achieve locking of the fan blade (2).

2. A rapidly detachable fan blade structure according to claim 1, characterized in that: The rotary locking member (5) comprises a rotary tube (51) which is sleeved on the end of the rotary shaft (3) and extends into the locking groove (12) and moves up and down as the rotary shaft (3) rotates; a locking ring (52) which surrounds the rotary tube (51) and can be inserted into the corresponding locking groove (21) is provided on the circumferential outer wall of the bottom of the rotary tube (51); a plurality of upwardly protruding convex teeth (53) are provided along the top surface of the locking ring (52); and a locking ring which is opposite to the convex teeth (53) is provided on the inner cavity top wall of the locking groove (12) above the convex teeth (53). The boss (54) is arranged around the guide shaft hole (13), and each boss (54) is provided with a slope (55) inclined in the same direction at the corner. A plug (41) extending downward is provided at the bottom of the knob (4), and a synchronous slot (56) is provided at the top of the rotating tube (51) to accommodate the plug (41) to be inserted, so that the rotating tube (51) rotates synchronously with the knob (4). A first return spring (6) is sleeved on the rotating shaft (3) between the bottom of the knob (4) and the top wall surface of the locking groove (12).

3. The quickly detachable fan blade structure according to claim 2, characterized in that: The knob (4) is provided with a positioning mechanism (7) capable of locking the rotation state of the knob (4) when the locking ring (52) is embedded in the locking groove (21).

4. The quickly detachable fan blade structure according to claim 3, characterized in that: The positioning mechanism (7) comprises positioning grooves (71) respectively arranged on the outer wall surface of the top of each locking groove (12); each knob (4) is respectively provided with a ball groove (42) with an opening at the bottom; a ball (43) capable of moving up and down is arranged in the ball groove (42); a second return spring (44) capable of keeping the bottom end of the ball (43) moving downward and extending out of the bottom opening of the ball groove (42) is arranged between the tail of the ball (43) and the top wall of the ball groove (42); the bottom end of the ball (43) is hemispherical and can slide along the outer wall surface of the top of the locking groove (12) as the knob (4) rotates; when the knob (4) drives the locking ring (52) to rotate and embed into the locking groove (21), the bottom end of the ball (43) is stuck in the positioning groove (71).

5. The quickly detachable fan blade structure according to claim 4, characterized in that: A vertical hole (32) is provided in the center of the rotating shaft (3) and passes through the vertical hole. A latch pin (33) that can move up and down is provided in the vertical hole (32). A pin hole (22) is provided in the center of the locking groove (21). A third return spring (34) is sleeved on the latch pin (33) located in the vertical hole (32) and can keep the bottom end of the latch pin (33) extending downwardly out of the bottom of the vertical hole (32) and inserted into the pin hole (22) below. The top of the latch pin (33) passes through and extends out of the top of the collar (31).

6. The quickly detachable fan blade structure according to claim 5, characterized in that: A first annular platform (35) is provided on the circumferential inner wall surrounding the bottom end of the vertical hole (32), a second annular platform (36) is provided on the circumferential outer wall surrounding the latch (33) near the bottom, the bottom surface of the second annular platform (36) abuts against the top surface of the first annular platform (35), and a third annular platform (37) is provided on the circumferential inner wall surrounding the collar (31) near the top, the bottom end of the third return spring (34) abuts against the top surface of the second annular platform (36), and the top of the third return spring (34) abuts against the bottom surface of the third annular platform (37) at the top of the collar (31).

7. The quickly detachable fan blade structure according to claim 5, characterized in that: A plug hole (14) is provided through the bottom of the fan blade mounting base (1), which is coaxial with the guide shaft hole (13) and can be connected to the locking groove (12); the bottom end of the latch pin (33) is hemispherical and is inserted into the plug hole (14) after passing through the pin shaft hole (22).

8. The quickly detachable fan blade structure according to claim 6, characterized in that: The knob (4) comprises a rotating cover (45), a countersunk hole (46) penetrating from top to bottom is provided in the center of the rotating cover (45), the top end of the rotating shaft (3) extends into the countersunk hole (46) and abuts against the bottom surface of the countersunk hole (46), the bottom end of the collar (31) is inserted into the countersunk hole (46), and the inner wall of the collar and the outer wall of the top end of the rotating shaft (3) are sleeved together by interference fit, symmetrically arranged operating ears (47) are connected to the circumferential outer wall of the rotating cover (45), the ball groove (42) is arranged at the bottom of one of the operating ears (47), and the insert (41) extends symmetrically downward from the bottom of the countersunk hole (46) and passes through the guide shaft hole (13).

9. The quickly detachable fan blade structure according to claim 8, characterized in that: The top end of the plug pin (33) passes through the center of the third annular platform (37), and an anti-dropping end (39) having a diameter greater than the inner hole diameter of the collar (31) is provided at the end extending outside the collar (31).

10. A quickly assembleable and disassembleable fan blade structure according to any one of claims 2 to 9, characterized in that: A clamping boss (38) is provided on the circumferential outer wall surrounding the bottom end of the rotating shaft (3), a synchronizing groove (57) capable of accommodating the clamping boss (38) to be embedded is provided at the bottom end of the rotating tube (51), and vertical surfaces (58) capable of cooperating with each other are respectively provided on the side surfaces of the clamping boss (38) and the side surfaces of the synchronizing groove (57), and the rotating shaft (3) and the rotating tube (51) rotate synchronously through the mutual cooperation of the vertical surfaces (58).

Images