Blade reinforced connecting structure

Abstract

The utility model relates to a blade reinforced connecting structure, which belongs to the technical field of industrial fan blades and comprises blades, a profiling connecting cavity, an upper fixing plate, a lower fixing plate, a profiling cushion, a front cover plate, an arc-shaped blade handle and an arc-shaped connecting steel sheet. According to the blade reinforced connection structure, the arc-shaped blade handle and the front cover plate are high in connection fitting degree, operation is more stable, the profiling connection cavity is connected with the rubber sleeve through left profiling, torque needed by operation of a fan can be effectively transmitted, and shearing force borne by rivets is reduced; the arc-shaped blade handle is matched and positioned with a shaft hole in the tail end of the profiling connecting cavity and is pressed by the front cover plate, bolts are not subjected to shearing force, and connection is reliable; the U-shaped steel sheets are large in tensile strength, free of segmented connection, free of the risk that the steel wire ropes are pulled off, good in attaching degree, integrally attached to the blade handle and the surface of the profiling connecting cavity, capable of absorbing impact loads to a certain extent, directly connected with the bolts penetrating through the profiling connecting cavity, reliable in connection, and free of the risk that threads are pulled off due to stress and the risk that the bolts are pulled off due to stress.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial fan blade technical field, concretely is a blade reinforced connection structure. BACKGROUND

[0002] HVLS (High Volume Low Speed) industrial fan is a kind of fan of high air volume, low speed, compared with traditional fan, HVLS fan runs at lower speed, so it can reduce noise and energy consumption, while providing uniform air flow, it is usually used in large space, such as warehouse, factory, gymnasium etc., the blade of HVLS fan is usually long, and the diameter can reach 2 meters to 7 meters, so it can produce a large amount of airflow at lower speed.

[0003] But the left end connecting groove of current industrial fan handle is not profiled, so there may be vibration to produce tiny displacement in operation;Profiling buffer pad and handle sleeve, small contact area, slightly weak absorption buffer;Profiling connection cavity left end and blade have no contact, not to blade running transmission force, rely on connecting bolt to transmit torque;Handle drop protection adopts a fish eye terminal steel wire rope connection, this way does not completely match arc-shaped handle, profiled connection cavity connecting piece, can not bear larger fracture load, there is the risk of steel wire and connecting ring separation. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of prior art, the utility model provides a kind of blade reinforced connection structure, with the advantages of good stability, solve the left end connecting groove of current industrial fan handle is not profiled, so there may be vibration to produce tiny displacement in operation;Profiling buffer pad and handle sleeve, small contact area, slightly weak absorption buffer;Profiling connection cavity left end and blade have no contact, not to blade running transmission force, rely on connecting bolt to transmit torque;Handle drop protection adopts a fish eye terminal steel wire rope connection, this way does not completely match arc-shaped handle, profiled connection cavity connecting piece, can not bear larger fracture load, there is the risk of steel wire and connecting ring separation.

[0005] To achieve the above object, the utility model provides the following technical scheme: a blade reinforcing connection structure, including blade, profiling connecting cavity, upper fixed plate, lower fixed plate, profiling buffer pad, front cover plate, arc blade handle and arc connecting steel sheet, the one end of arc blade handle is provided with rectangular blade handle, arc blade handle and rectangular blade handle are integrally formed, the surface of arc connecting steel sheet is provided with U connecting steel sheet, arc connecting steel sheet and U connecting steel sheet are integrally formed, the surface of arc connecting steel sheet is provided with first bolt hole, the surface of U connecting steel sheet is provided with two second bolt holes that correspond, arc blade handle is provided with third bolt hole, the surface of rectangular blade handle is provided with two fourth bolt holes, the front cover plate is sleeved on the surface of arc blade handle, the profiling buffer pad is matched with profiling connecting cavity and is sleeved on the surface of profiling connecting cavity, and the profiling buffer pad is attached to the inner wall of blade.

[0006] Further, the external shape and size of the profiling connecting cavity are matched with the internal shape and size of the blade, and the left end of the profiling connecting cavity is in contact with the inner wall of the blade.

[0007] Further, the surface arc of the upper fixed plate is matched with the upper surface arc of the blade.

[0008] Further, the arc of the arc connecting steel sheet is matched with the arc of the surface of the arc blade handle.

[0009] Further, the left end groove of the arc blade handle is a circular arc profiling groove.

[0010] Compared with the prior art, the technical scheme has the following beneficial effects:

[0011] The blade reinforcing connection structure has the following advantages: the arc blade handle and the front cover plate are connected with high adhesion, the operation is more stable, the profiling connecting cavity is connected with the rubber sleeve through left profiling, can effectively transmit the torque required for fan operation, reduce the shear force borne by the rivet, the arc blade handle and the tail end shaft hole of the profiling connecting cavity are positioned by cooperation, are pressed by the front cover plate, the bolt is not subjected to shear force, the positioning precision is high, the connection is reliable, the tensile strength of the steel sheet is large, there is no segmented connection, there is no risk of steel wire rope pulling off, the adhesion of the steel sheet is good, the steel sheet is integrally formed by a mold, the curved surface precision is high, the whole is attached to the surface of the blade handle and the profiling connecting cavity, has a certain ability to absorb impact load, the steel sheet is directly connected with the bolt penetrating the profiling connecting cavity, the connection is reliable, there is no risk of thread force pulling and breaking and bolt pulling off. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the whole structure schematic view of the utility model;

[0013] Fig. 2 It is the profiling buffer pad schematic view of the utility model structure;

[0014] Fig. 3 The utility model structural profiled connecting cavity schematic diagram shows;

[0015] Fig. 4 The utility model structural rectangular leaf stalk schematic diagram shows;

[0016] Fig. 5 The utility model structural arc connecting steel sheet schematic diagram shows.

[0017] In the drawing: 1, blade;2, profiled connecting cavity;3, upper fixed plate;4, lower fixed plate;5, profiled buffer pad;6, front cover plate;7, arc leaf stalk;8, arc connecting steel sheet;9, rectangular leaf stalk;10, U-shaped connecting steel sheet;11, first bolt hole;12, second bolt hole;13, third bolt hole;14, fourth bolt hole. Specific implementation

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] Please refer to Figs. 1 to 5 In the embodiment, a blade reinforcing connection structure comprises a blade 1, a profiled connecting cavity 2, an upper fixed plate 3, a lower fixed plate 4, a profiled buffer pad 5, a front cover plate 6, an arc leaf stalk 7 and an arc connecting steel sheet 8, the front cover plate 6 is sleeved on the surface of the arc leaf stalk 7, the arc leaf stalk 7 is provided with a rectangular leaf stalk 9 at one end, the arc leaf stalk 7 is integrally formed with the rectangular leaf stalk 9, the arc connecting steel sheet 8 is provided with a U-shaped connecting steel sheet 10 on the surface, the arc connecting steel sheet 8 is integrally formed with the U-shaped connecting steel sheet 10, the arc connecting steel sheet 8 is provided with a first bolt hole 11 on the surface, the U-shaped connecting steel sheet 10 is provided with two corresponding second bolt holes 12 on the surface, the arc leaf stalk 7 is provided with a third bolt hole 13, the rectangular leaf stalk 9 is provided with two fourth bolt holes 14 on the surface, the profiled connecting cavity 2 is externally shaped and sized to match the internal shape and size of the blade 1, the surface arc of the upper fixed plate 3 matches the upper surface arc of the blade 1, the arc of the arc connecting steel sheet 8 matches the arc of the surface of the arc leaf stalk 7, the left end groove of the arc leaf stalk 7 is a circular arc profiled groove, which is convenient to match and tightly fix with the pressure disc, and the operation is more stable.

[0020] The profiled cushion 5 is matched with the profiled connecting cavity 2 and is sleeved on the surface of the profiled connecting cavity 2, the profiled cushion 5 is attached to the inner wall of the blade 1, the profiled connecting cavity 2 and the profiled cushion 5 are matched in shape at the attached position of the blade 1, the profiled connecting cavity 2 and the profiled cushion 5 provide direct force, large contact area, stable force transmission, can absorb vibration, and can reduce the shear force of the rivet.

[0021] The left end of the profiled connecting cavity 2 is in contact with the inner wall of the blade 1, the profiled connecting cavity 2 directly drives the blade 1 to run, and the rivet is not subjected to torque. The U-shaped connecting steel sheet 10 can prevent the rectangular blade handle 9 from falling off.

[0022] It should be noted that the arc-shaped blade handle 7 and the rectangular blade handle 9 have an angle of 8 degrees in the radial direction; the rectangular groove in the profiled connecting cavity 2 is matched with the square blade handle for positioning, and after assembly, the blade 1 has an upward angle in the running direction. The front end has a blade handle axial positioning.

[0023] The working principle of the above embodiment is as follows:

[0024] The profiled cushion 5 is sleeved on the surface of the profiled connecting cavity 2, the profiled connecting cavity 2 and the profiled cushion 5 are sent into the blade 1, the upper fixed plate 3 and the lower fixed plate 4 are fixed on the blade 1 and the profiled connecting cavity 2 by using four connecting rivets, the rectangular blade handle 9 is inserted into the profiled connecting cavity 2, the front cover plate 6 is moved and fixed by using a bolt, the rectangular blade handle 9 is limited and fixed in the profiled connecting cavity 2 by using the front cover plate 6, the arc-shaped connecting steel sheet 8 is placed on the surface of the arc-shaped blade handle 7, the first bolt hole 11 corresponds to the third bolt hole 13, the U-shaped connecting steel sheet 10 is sleeved on the profiled connecting cavity 2, the second bolt hole 12 corresponds to the fourth bolt hole 14, and the arc-shaped connecting steel sheet 8, the arc-shaped blade handle 7, the U-shaped connecting steel sheet 10 and the rectangular blade handle 9 are connected by using a bolt.

[0025] It should be noted that, in the present document, the terms such as first and second, etc., are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0026] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A blade reinforcing connecting structure, comprising a blade (1), a profiling connecting cavity (2), an upper fixing plate (3), a lower fixing plate (4), a profiling buffer pad (5), a front cover plate (6), an arc-shaped blade handle (7) and an arc-shaped connecting steel sheet (8), characterized in that: The arc-shaped leaf stalk (7) is provided with a rectangular leaf stalk (9) at one end, the arc-shaped leaf stalk (7) and the rectangular leaf stalk (9) are integrally formed, the surface of the arc-shaped connecting steel sheet (8) is provided with a U-shaped connecting steel sheet (10), the arc-shaped connecting steel sheet (8) and the U-shaped connecting steel sheet (10) are integrally formed, the surface of the arc-shaped connecting steel sheet (8) is provided with a first bolt hole (11), the surface of the U-shaped connecting steel sheet (10) is provided with two corresponding second bolt holes (12), the arc-shaped leaf stalk (7) is provided with a third bolt hole (13), the surface of the rectangular leaf stalk (9) is provided with two fourth bolt holes (14), the front cover plate (6) is sleeved on the surface of the arc-shaped leaf stalk (7), the profiled buffer pad (5) is matched with the profiled connecting cavity (2) and is sleeved on the surface of the profiled connecting cavity (2), the profiled buffer pad (5) is attached to the inner wall of the blade (1), and the profiled connecting cavity (2) and the profiled buffer pad (5) are matched with the shape of the attached part of the blade (1).

2. A blade stiffening connection structure according to claim 1, characterised in that: The outer shape and size of the profiled connecting cavity (2) are matched with the inner shape and size of the blade (1), and the left end of the profiled connecting cavity (2) is in contact with the inner wall of the blade (1).

3. The blade stiffening connection structure of claim 1, wherein: The surface curvature of the upper fixed plate (3) is matched with the upper surface curvature of the blade (1).

4. The blade stiffening connection structure of claim 1, wherein: The curvature of the arc-shaped connecting steel sheet (8) is matched with the curvature of the surface of the arc-shaped leaf stalk (7).

5. The blade stiffening connection structure of claim 1, wherein: The left end groove of the arc-shaped leaf stalk (7) is a circular arc profiled groove.

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