Industrial ceiling fan blade damping structure

Abstract

The utility model discloses an industrial ceiling fan blade damping structure which comprises a blade, a blade handle and a lining, the blade is provided with a first cavity and a second cavity, and the lining comprises an end plate, a damping supporting part and a first positioning part; a mounting groove is formed in the damping supporting part, the section shape of the mounting groove is matched with the section shape of the blade handle, the section shape of the damping supporting part is matched with the section shape of the first cavity, a connecting hole is formed in the inserting part of the blade handle, a bolt mounting hole is formed in the blade, a through hole is formed in the damping supporting part, and the inserting part of the blade handle is inserted into the mounting groove. After bolts penetrate through the bolt mounting holes, the penetrating holes and the connecting holes, the blades, the damping supporting part and the blade handle are fixed together. The damping supporting part is matched with the first cavity of the blade in shape, and the inner channel of the damping supporting part is matched with the blade handle in shape, so that connection between the blade handle and the blade and connection between the blade handle and the damping supporting part are tighter and more stable, and vibration generated when the blade moves is reduced.

Description

Technical Field

[0001] The utility model relates to the field of industrial ceiling fans, and particularly to a shock-absorbing structure for industrial ceiling fan blades. Background Art

[0002] Industrial ceiling fans are commonly used industrial machines that are widely applied to large spaces such as industrial workshops, logistics warehouses, waiting rooms, exhibition halls, stadiums, and shopping malls for space ventilation and personnel cooling. Blades are the key components of industrial large fans and also the components with the most complex stress. The quality of their design and manufacture directly affects the efficiency and service life of industrial ceiling fans and the performance of the entire system.

[0003] Existing industrial ceiling fan blades are generally made by stretching and extruding aluminum alloy. However, there are problems such as relatively heavy weight and insufficient strength of the blades made of aluminum alloy. To solve the problem of insufficient strength of the profile blades, in the prior art, materials such as steel wires are added inside the profile blades to increase strength, and the insufficient strength has been improved to a certain extent. However, these measures further increase the weight of the blades, and the manufacturing process is complex and the manufacturing cost is high. For this reason, the applicant has invented an industrial ceiling fan blade structure with simple manufacturing, light weight, and high structural strength. The blade is formed by cold bending a thin metal plate. During assembly, the blade handle is inserted into the cavity inside the blade and fixed by bolts. However, since there is a gap between the blade handle and the inner wall of the cavity, this gap causes the blade to vibrate during movement. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, the utility model provides a shock-absorbing structure for industrial ceiling fan blades.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A shock-absorbing structure for industrial ceiling fan blades, comprising a blade and a blade handle. The blade is formed by cold bending a thin metal plate. The blade has a first chamber and a second chamber. The connecting end of the blade has a connecting area for connecting with the blade handle. A bushing is provided in the connecting area. The bushing includes an end plate for sealing the opening of the connecting end, a shock-absorbing support portion extending into the first chamber, and a first positioning portion inserted into the second chamber. An installation groove extending to the surface of the end plate is provided inside the shock-absorbing support portion. The cross-sectional shape of the installation groove is adapted to the cross-sectional shape of the blade handle. The cross-sectional shape of the shock-absorbing support portion is adapted to the cross-sectional shape of the first chamber. A connecting hole is provided on the insertion portion of the blade handle. A bolt installation hole is provided at a position corresponding to the first chamber on the blade. A through hole is provided at a position corresponding to the bolt installation hole on the shock-absorbing support portion. The insertion portion of the blade handle is inserted into the installation groove. A bolt is provided in the bolt installation hole. The bolt passes through the bolt installation hole, the through hole, and the connecting hole, and then fixes the blade, the shock-absorbing support portion, and the blade handle together.

[0007] With the above technical solution, the shock-absorbing support part of the bushing is adapted to the shape of the first chamber of the blade, and the installation groove in the shock-absorbing support part is adapted to the shape of the petiole, making the connection between the petiole and the blade and between the petiole and the shock-absorbing support part tighter and more stable, reducing the vibration during the movement of the blade.

[0008] In a specific embodiment of the present utility model: the surface of the shock-absorbing support part has grid grooves. With this structure, not only the overall weight of the bushing is reduced, but also the shock-absorbing effect is enhanced.

[0009] In a specific embodiment of the present utility model: the length of the shock-absorbing support part is 20 - 30 cm.

[0010] In a specific embodiment of the present utility model: the bushing is made of plastic material.

[0011] In a specific embodiment of the present utility model: the end plate, the first positioning part and the shock-absorbing support part are of an integrally formed structure.

[0012] In a specific embodiment of the present utility model: a seal is provided at the opening of the closed end of the blade, and the seal includes a sealing plate for blocking the opening of the closed end, and a second positioning part and a third positioning part respectively inserted into the first chamber and the second chamber.

[0013] In a specific embodiment of the present utility model: the four peripheral edges of the sealing plate and the end plate protrude from the four peripheral edges of the blade opening.

[0014] In a specific embodiment of the present utility model: the blade is divided into a lower panel, an upper panel, and a reinforcing rib plate supported between the lower panel and the upper panel.

[0015] In a specific embodiment of the present utility model: there are gaps for avoiding the reinforcing rib plate between the shock-absorbing support part and the first positioning part of the bushing, and between the second positioning part and the third positioning part of the seal.

[0016] In a specific embodiment of the present utility model: the upper panel is an integrally smooth upwardly convex arc plate, and the upper panel is divided into a first arc plate bent from the diversion side edge of the lower panel and a second arc plate welded to the first arc plate and bent from the windward side edge of the lower panel.

[0017] In a specific embodiment of the present utility model: the lower panel is an integrally smooth arc plate, having a first arc portion slightly recessed upward near the diversion side and a second arc portion slightly protruding downward near the windward side.

[0018] In a specific embodiment of the present utility model: The reinforcing rib plate is a vertical plate that is cold bent downward from the termination edge of the first arc-shaped plate or the second arc-shaped plate and welded to the lower panel.

[0019] In a specific embodiment of the present utility model: The thin metal plate is made of galvanized steel sheet or stainless steel sheet, and the thickness is 0.8 - 1 mm.

[0020] In a specific embodiment of the present utility model: The middle of the blade is thick and gradually thins towards both sides, and the guiding side edge is thinner than the windward side edge.

[0021] In a specific embodiment of the present utility model: The lower edge of the reinforcing rib plate is also bent to form a first folded edge that abuts against the upper surface of the lower panel.

[0022] In summary, the blade in the present utility model is made of galvanized steel sheet or stainless steel sheet, and has the advantages of light weight and low cost. Among them, by bending out the reinforcing rib plate in the middle, the overall strength of the formed blade is increased, thereby avoiding deformation or fracture of the blade during high-speed operation and improving the quality of the blade. In addition, the shock-absorbing support part of the bushing is adapted to the shape of the first chamber of the blade, and the installation groove in the shock-absorbing support part is adapted to the shape of the leaf stalk, making the connection between the leaf stalk and the blade, and between the leaf stalk and the shock-absorbing support part more tight and stable, reducing the vibration during the movement of the blade. In addition, the surface of the shock-absorbing support part adopts a grid groove structure, which not only reduces the overall weight of the bushing, but also further enhances the shock-absorbing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further describes the present utility model with reference to the drawings.

[0024] Figure 1 is a schematic structural diagram of a shock-absorbing structure of an industrial ceiling fan blade of the present utility model;

[0025] Figure 2 is an enlarged view of the connection end of the blade;

[0026] Figure 3 is an enlarged view of the closed end of the blade;

[0027] Figure 4 is a schematic structural diagram of the leaf stalk of the present utility model;

[0028] Figure 5 is a schematic structural diagram of the bushing of the present utility model;

[0029] Figure 6 is a schematic structural diagram of the seal of the present utility model;

[0030] Figure 7 is a cross-sectional view of the blade of the present utility model. SPECIFIC EMBODIMENTS

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 and Figure 4 As shown, the utility model is an industrial ceiling fan blade damping structure, comprising a blade 10 and a flat petiole 20.

[0033] Combination Figure 7 As shown, the blade 10 is formed by cold bending a thin metal plate in the width direction, and is formed with a lower panel 11, an upper panel 12, and a reinforcing rib plate 13 supported between the lower panel 11 and the upper panel 12. The blade 10 is divided into a first chamber 101 and a second chamber 102 by the reinforcing rib plate 13. In this embodiment, the thin metal plate is a galvanized steel plate or a stainless steel plate with a thickness of 0.8 to 1 mm. The use of a galvanized steel plate or a stainless steel plate has the advantages of light weight and low cost. The bent blade 10 is thick in the middle and gradually thins toward both sides, and the edge of the guide side 10a is thinner than the edge of the windward side 10b.

[0034] In this embodiment, the upper panel 12 is an overall smooth and upwardly convex arc plate. The upper panel 12 is divided into a first arc plate 121 cold-bent from the edge of the lower panel 11 on the airflow guide side, and a second arc plate 122 cold-bent from the edge of the lower panel 11 on the windward side and connected to the first arc plate.

[0035] In this embodiment, the lower panel 11 is an overall smooth arc-shaped plate, which is divided into a first arc-shaped portion 111 slightly concave upward near the flow-guiding side 10a, and a second arc-shaped portion 112 slightly convex downward near the windward side 10b.

[0036] The reinforcing rib plate 13 may be a vertical plate connected to the lower panel 11, which is cold-bent downward from the terminal edge of the first curved plate 121 or the second curved plate 122. In this embodiment, the reinforcing rib plate 13 is a vertical plate formed by bending downward from the terminal edge of the first curved plate 121. The lower edge of the reinforcing rib plate 13 is welded to the surface of the lower panel 11. The terminal edge of the second curved plate 122 is welded to the junction of the first curved plate 121 and the reinforcing rib plate 13.

[0037] In the present utility model, the lower edge of the reinforcing rib plate 13 is bent towards the windward side to form a first folded edge 131 that abuts against the upper surface of the lower panel 11. During assembly, the first folded edge 131 of the reinforcing rib plate 13 is welded to the lower panel 11. With this structure, the lower edge of the reinforcing rib plate is bent outward to form the first folded edge 131, and the edge of the first folded edge 131 serves as the welding position, which is far from the reinforcing rib plate 13. This not only facilitates welding but also increases the structural strength. The terminating edge of the second arc-shaped plate 122 is also bent downward to form a second folded edge 123 that abuts against the reinforcing rib plate 13. During assembly, the second folded edge 123 is welded to the reinforcing rib plate 13.

[0038] As Figure 2 and Figure 5 shown, the connecting end 103 of the blade 10 has a connecting area for connecting with the leafstalk 20, and a bushing 30 is provided within the connecting area.

[0039] In this embodiment, the bushing 30 includes an end plate 301 that seals the opening of the connecting end, a shock-absorbing support portion 302 that extends into the first chamber 101, and a first positioning portion 303 that is inserted into the second chamber 102. Among them, the outer contour shape of the shock-absorbing support portion 302 is adapted to the shape of the first chamber 101. The shock-absorbing support portion 302 has an installation groove 304 that extends to the surface of the end plate 301. The cross-sectional shape of the installation groove 304 is adapted to the cross-sectional shape of the leafstalk.

[0040] As Figure 2 , Figure 4 and Figure 5 shown, three connecting holes 201 are formed on the insertion portion of the leafstalk 20. Three bolt mounting holes 202 are formed on the blade 10 corresponding to the position of the first chamber 101. Three through holes 203 are provided on the shock-absorbing support portion corresponding to the positions of the bolt mounting holes. Bolts are installed in the bolt mounting holes 202. During assembly, first, the bushing 30 is inserted into the opening of the blade connecting end. The shock-absorbing support portion 302 of the bushing 30 is inserted into the first chamber 101, and the first positioning portion 303 is inserted into the second chamber 102. Subsequently, the insertion portion of the leafstalk 20 is inserted into the installation groove 304 of the shock-absorbing support portion 302, and after the bolts pass through the bolt mounting holes 202, the through holes 203, and the connecting holes 201, the blade 10, the shock-absorbing support portion 302, and the leafstalk 20 are fixed together.

[0041] In this embodiment, the length of the shock-absorbing support portion is 20 - 30 cm. Among them, the length of the shock-absorbing support portion 302 is longer than the length of the insertion portion of the leafstalk 20.

[0042] In this embodiment, the surface of the shock-absorbing support portion 302 has lattice grooves 305. With this structure, not only the overall weight of the bushing is reduced, but also the shock-absorbing effect is enhanced.

[0043] In this embodiment, the bushing is made of plastic material.

[0044] In this embodiment, the end plate, the first positioning portion, and the shock-absorbing support portion are integrally formed structures.

[0045] As Figure 3 and Figure 6 shown, a seal 31 is provided at the opening of the closed end 104 of the blade 10. The seal includes a sealing plate 311 for blocking the opening of the closed end 104, and a second positioning portion 312 and a third positioning portion 313 respectively inserted into the first chamber 101 and the second chamber 102.

[0046] In this embodiment, the peripheral edges of the sealing plate 311 and the end plate 301 protrude from the peripheral edges of the opening of the blade 10.

[0047] In this embodiment, there are gaps for avoiding the reinforcing rib plates between the shock-absorbing support portion 302 and the first positioning portion 303 of the bushing, and between the second positioning portion 312 and the third positioning portion 313 of the seal.

[0048] In summary, the blade in the present utility model is made of galvanized steel plate or stainless steel plate, and has the advantages of light weight and low cost. Among them, by bending out the reinforcing rib plate in the middle, the overall strength of the formed blade is increased, thereby avoiding deformation or fracture of the blade during high-speed operation and improving the quality of the blade. In addition, the shock-absorbing support portion of the bushing is adapted to the shape of the first chamber of the blade, and the installation groove in the shock-absorbing support portion is adapted to the shape of the leafstalk, making the connection between the leafstalk and the blade, and between the leafstalk and the shock-absorbing support portion tighter and more stable, reducing the vibration during the movement of the blade. In addition, the surface of the shock-absorbing support portion adopts a grid groove structure, which not only reduces the overall weight of the bushing, but also further enhances the shock-absorbing effect.

[0049] The above has described in detail an embodiment of the present utility model, but the content described is only the preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. An industrial ceiling fan blade damping structure, comprising a blade and a petiole, wherein the blade is formed by cold bending of a thin metal plate, the blade has a first chamber and a second chamber, and the connecting end of the blade has a connecting area connected to the petiole, characterized in that: A bushing is provided in the connecting area, and the bushing includes an end plate that seals the opening of the connecting end, a shock-absorbing support part extending into the first chamber, and a first positioning part inserted into the second chamber; the shock-absorbing support part has an installation groove extending to the surface of the end plate, the cross-sectional shape of the installation groove is adapted to the cross-sectional shape of the petiole, the cross-sectional shape of the shock-absorbing support part is adapted to the cross-sectional shape of the first chamber, a connecting hole is provided on the insertion part of the petiole, a bolt mounting hole is provided at a position corresponding to the first chamber on the blade, a through hole is provided at a position corresponding to the bolt mounting hole on the shock-absorbing support part, the insertion part of the petiole is inserted into the installation groove, a bolt is provided in the bolt mounting hole, and after the bolt passes through the bolt mounting hole, the through hole and the connecting hole, the blade, the shock-absorbing support part and the petiole are fixed together.

2. The industrial ceiling fan blade shock absorbing structure according to claim 1 is characterized in that: The surface of the shock-absorbing support portion has a grid groove.

3. The industrial ceiling fan blade shock absorbing structure according to claim 1 is characterized in that: The length of the shock-absorbing support portion is 20 to 30 cm.

4. The industrial ceiling fan blade shock absorbing structure according to claim 1 is characterized in that: The bushing is made of plastic material.

5. The industrial ceiling fan blade shock absorbing structure according to claim 1 is characterized in that: A sealing member is provided at the opening of the closed end of the blade, and the sealing member includes a sealing plate for sealing the opening of the closed end, and a second positioning portion and a third positioning portion respectively inserted into the first cavity and the second cavity.

6. The industrial ceiling fan blade shock absorbing structure according to claim 5 is characterized in that: The blade is divided into a lower panel, an upper panel, and a reinforcing rib plate supported between the lower panel and the upper panel.

7. The industrial ceiling fan blade shock absorbing structure according to claim 6, characterized in that: There is a gap between the shock-absorbing support portion and the first positioning portion of the bushing, and between the second positioning portion and the third positioning portion of the seal to avoid the reinforcing rib plate.

8. The industrial ceiling fan blade shock absorbing structure according to claim 6, characterized in that: The edges around the sealing plate and the end plate all protrude from the edges around the blade opening.

9. The industrial ceiling fan blade shock absorbing structure according to claim 6, characterized in that: The upper panel is an overall smooth and upwardly convex arc-shaped plate, and is divided into a first arc-shaped plate bent from the edge of the guide side of the lower panel, and a second arc-shaped plate bent from the edge of the windward side of the lower panel and welded to the first arc-shaped plate; the lower panel is an overall smooth arc-shaped plate, having a first arc-shaped portion slightly concave upward near the guide side, and a second arc-shaped portion slightly convex downward near the windward side; the reinforcing rib plate is a vertical plate cold-bent downward from the terminal edge of the first arc-shaped plate or the second arc-shaped plate and welded to the lower panel.

10. The industrial ceiling fan blade shock absorbing structure according to claim 1, characterized in that: The thin metal plate is made of galvanized steel plate or stainless steel plate with a thickness of 0.8-1 mm.

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