A large movable fan

Abstract

The utility model relates to a movable large -scale fan, include: shell, including side frame and fixed in the front and back of side frame's protective screen cover, the side frame is surrounded by metal sheet and is the cylinder that penetrates from front to back, and its center axis is parallel with horizontal direction, the inside of shell is equipped with at least one crossbeam, the crossbeam passes through the center of circular side frame, and both ends are fixed with the inside wall of side frame, the middle part of crossbeam is equipped with bearing seat, fan blade, be located in the inside of shell, the pivot of fan blade rotatably installs at bearing seat place, the hand of drawing, the hand of drawing is fixed on the outside wall of left side or right side of side frame, and is located the upside of crossbeam, at least two handles, two handles are fixed on the outside wall of left side and right side of side frame respectively, and are located the downside of crossbeam, compared with prior art, the fan of the utility model can lift the bulky fan through the handle of both sides, and the movement of going up and down the stairs is convenient.

Description

Technical Field

[0001] This utility model relates to the field of industrial fans, and in particular to a large portable fan. Background Technology

[0002] Industrial fans are typically powerful and large, making them cumbersome and difficult to move. Current technology often uses wheels mounted on the bottom of the fan and a handle on the upper side of the fan casing to facilitate movement. However, this type of fan is usually only suitable for a single person to push on flat ground; it becomes difficult to apply force when going up or down stairs, making movement extremely inconvenient. Utility Model Content

[0003] Based on this, the purpose of this utility model is to overcome the defects or deficiencies of the prior art and provide a movable large fan, comprising: a shell, including a side frame and protective mesh covers fixed to the front and rear of the side frame; the side frame is formed by metal plates in a cylindrical shape that runs through the front and back, with its central axis parallel to the horizontal direction; at least one crossbeam is provided inside the shell; the crossbeam passes through the center of the circular side frame and is fixed at both ends to the inner side wall of the side frame; a bearing seat is provided in the middle of the crossbeam; fan blades are located inside the shell, and the shaft of the fan blades is rotatably mounted at the bearing seat; a handle is fixed to the outer side wall of the left or right side of the side frame and is located above the crossbeam; at least two handles are fixed to the outer side walls of the left and right sides of the side frame respectively and are located below the crossbeam.

[0004] Compared to existing technologies, the fan described in this invention can be lifted by the handles on both sides, making it easy to move up and down stairs.

[0005] In one embodiment, the system also includes movable handles, which are hinged to the middle of the left and right sides of the outer wall of the side frame via a hinge. By adding movable handles, two workers can easily grip and stabilize the fan from both sides, facilitating the lifting of the fan up and down stairs by two people.

[0006] In one embodiment, the hinge of the movable handle is provided with a limiting portion, which limits the maximum extension of the movable handle to an angle perpendicular to the side wall. Controlling the movable handle to extend to a maximum of 90 degrees ensures effective upward force when the fan is lifted.

[0007] In one embodiment, the system further includes at least two sets of wheels, which are respectively mounted on the outer side walls of the left and right sides of the side frame via wheel brackets.

[0008] In one embodiment, the device further includes a motor for driving the fan blades to rotate. The housing also contains at least two vertical beams and a motor bracket fixed between the two vertical beams. The two vertical beams are parallel to each other and vertically arranged, with one end fixed to the surface of the crossbeam and the other end fixed to the inner surface of the side frame. The motor bracket is horizontally arranged, with both ends fixed to the two vertical beams respectively. The motor is fixed to the motor bracket. The output shaft of the motor is provided with a small pulley, and the shaft of the fan blade is provided with a large pulley. The small pulley of the motor and the large pulley of the fan blade are connected by a transmission belt.

[0009] In one embodiment, of the two sets of wheels, the set on the same side as the handle includes at least two omnidirectional wheels, and the set on the opposite side includes at least two directional wheels. When moving on flat ground, one person can control the direction of the omnidirectional wheels on the same side by holding the handle, and by pushing or pulling, the fan can be moved on the plane.

[0010] In one embodiment, among the two sets of wheels, the set on the same side as the handle includes at least two omnidirectional wheels, and the set on the opposite side includes at least two sets of stair-climbing triangular wheel sets. Each set of stair-climbing triangular wheel sets includes a star-shaped wheel bracket and three directional wheels. The star-shaped wheel bracket has a wheel cylinder at its center and three wheel support arms on its outer periphery. The wheel cylinder is used to rotatably connect the star-shaped wheel bracket to the side frame, and each of the wheel support arms has a directional wheel rotatably mounted at its end. Each star-shaped wheel bracket and each directional wheel on it are parallel to the protective net cover. When the handle on the side with the omnidirectional wheels is lifted, allowing only the stair-climbing triangular wheel sets to touch the ground, the stair-climbing triangular wheel sets can climb upwards step by step through the revolution and rotation of the directional wheels. Attached Figure Description

[0011] Figure 1 This is a perspective view of the fan in Embodiment 1. To clearly show the internal structure, one of the protective mesh covers is not shown. Figure 2 This is a perspective view of the fan in Example 1, in which neither of the two protective mesh covers is shown; Figure 3 A front view of the hand being pulled out of the activity frame when it is close to the side frame; Figure 4 A side view of the movable hand when it is perpendicular to the side frame; Figure 5 This is a front view of the fan described in Example 2.

[0012] Figure Labels 11 Side frame, 12 Protective net cover, 131 Horizontal beam, 132 Vertical beam, 133 Motor bracket, 21 Fan blade, 21a Large pulley, 22 Motor, 22a Small pulley, 23 Belt, 31 Handle, 32 Lifting handle, 33 Movable handle, 34 Hinge, 35 Limiting part, 41 Universal wheel, 42 Fixed wheel, 43 Stair climbing triangular wheel set, 431 Fixed wheel, 432 Star wheel bracket, 44 Wheel bracket. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the accompanying drawings.

[0014] Example 1 like Figure 1 , 2 The large portable fan shown includes a housing, fan blades 21 enclosed within the housing, a handle 31 fixed to the outside of the housing for pushing and pulling on flat ground, at least two handles 32 for lifting up and down stairs, and wheels located on the underside of the housing.

[0015] Specifically, the outer casing includes a side frame 11 and protective mesh covers 12 fixed to the front and rear of the side frame 11. The side frame 11 is a cylindrical shape formed by a metal sheet, extending from front to back, with its center parallel to the horizontal direction. In this embodiment, the fan side frame 11 has a diameter of approximately 1.5 meters, or about the height of a person. The outer casing also includes at least one horizontal beam 131 and at least two vertical beams 132. The horizontal beam 131 passes through the center of the circular side frame 11, and its two ends are fixed to the inner sidewall of the side frame 11; the middle of the horizontal beam 131 is fixed with a bearing seat for fixing the shaft of the fan blade 21. The fan blade 21 is located inside the outer casing, and its shaft is rotatably mounted at the bearing seat. In this way, the central shaft of the fan blade 21 coincides with the central axis of the side frame 11.

[0016] At least two vertical beams 132 are vertically fixed inside the outer casing. The two vertical beams 132 are parallel and vertically arranged, with one end fixed to the surface of the crossbeam 131 and the other end fixed to the inner surface of the side frame 11. A motor bracket 133 is fixed between the two vertical beams 132. The motor bracket 133 is horizontally arranged, with both ends fixed to the two vertical beams 132 respectively, and the motor 22 is fixed to the motor bracket 133. A small pulley 22a is provided on the output shaft of the motor 22, and a large pulley 21a is provided on the shaft of the fan blade 21. The small pulley 22a of the motor 22 and the large pulley 21a of the fan blade 21 are connected by a transmission belt 23. In this preferred embodiment, the fan housing is provided with four vertical beams 132. Two of them are fixed below the horizontal beam 131 to fix and support the motor bracket 133, and the other two vertical beams 132 are fixed above the horizontal beam 131. In this way, the parts above and below the horizontal beam 131 of the side frame 11 are supported by vertical beams 132, making it less prone to deformation and damage.

[0017] At least one drawer 31 and at least two handles 32 are fixed to the outer side wall of the outer frame 11. The drawer 31 is fixed to the outer side wall of the side frame 11 above the crossbeam 131 and is mainly used to push or pull the fan on flat ground. The handles 32 are fixed to the outer side wall of the side frame 11 below the crossbeam 131 and are mainly used to lift the fan for easy movement when going up or down stairs.

[0018] Specifically, the handle 31 is fixed to the outer wall of the left or right side of the side frame 11, and is located above the crossbeam 131. In this embodiment, the handle 31 is fixed to the left side of the side frame 11 as shown in the figure, and the angle between the line connecting the handle 31 to the center of the side frame 11 and the crossbeam 131 is approximately 45 degrees. In this way, the handle 31 is positioned at approximately shoulder height when a person is standing, facilitating pushing on flat ground.

[0019] The two handles 32 are respectively fixed to the outer walls of the left and right sides of the side frame 11 as shown in the figure, and are located below the crossbeam 131. In this embodiment, the angle between the line connecting the handle 31 to the center of the side frame 11 and the crossbeam 131 is approximately 45 degrees, so the handle 32 is approximately at the height of a person's lower leg. When going up or down stairs, two people, one on the left and one on the right, lift / raise the fan using the handles 32, and then work together to lift / raise the bulky fan up or down the stairs.

[0020] The wheels are in two sets, rotatably fixed to the outer walls of the left and right sides of the side frame 11 via wheel brackets 44, and located below the two handles 32. Each set of wheels has two wheels, forming a rectangular four-corner support to ensure support and movement of the fan. Preferably, the set of wheels on the same side as the handles 31 is a swivel caster 41, and the set of wheels on the opposite side of the handles 31 is a directional caster 42. This allows a single person to easily control the movement of the large fan on flat ground.

[0021] Furthermore, considering that the fan in this embodiment is approximately the height of a person, when a worker lifts the fan using the handle 32, they often need to hold and stabilize it with both hands. However, the distance between the upper handle 31 and the lower handle 32 is relatively large, making it inconvenient for a worker to hold it with both hands simultaneously. Therefore, two movable handles 33 are respectively provided on the outer side walls in the middle of the left and right sides of the side frame 11. Figure 3 , 4 As shown, the movable handle 33 is hinged to the side frame 11 via a hinge 34, approximately flush with the crossbeam 131. This allows two workers to each hold the lower handle 32 with one hand and the middle movable handle 33 with the other, facilitating the application of force to stabilize the fan. The movable handle 33 can rotate to fit snugly against the side frame 11 or open to form an angle with the surface of the side frame 11. Specifically, the hinge 34 of the movable handle 33 is provided with a limiting part 35. This limiting part 35 is located above the pivot of the movable handle 33 and perpendicular to the surface of the side frame 11, limiting the movable handle 33 to a maximum angle perpendicular to the side wall, ensuring effective force application when the worker lifts the fan.

[0022] Example 2 like Figure 5 As shown, the difference between Embodiment 2 and Embodiment 1 is that the set of two wheels on the opposite side of the pull handle 31 is replaced with two sets of stair-climbing triangular wheel sets 43.

[0023] Each set of stair-climbing triangular wheel assembly 43 includes three directional wheels 431 and a star-shaped wheel bracket 432. The star-shaped wheel bracket 432 has a wheel cylinder at its center and three wheel support arms on its outer periphery. The wheel cylinder is used to insert a rotating shaft. A bearing is provided on the wheel bracket 44 fixed to the bottom of the side frame 11. The rotating shaft inserted in the wheel cylinder of the star-shaped wheel bracket 432 is connected to the bearing on the wheel bracket 44 fixed to the bottom of the side frame 11, so that the star-shaped wheel bracket 432 is rotatably connected to the side frame 11. Preferably, the star-shaped wheel bracket 432 is parallel to the protective net cover 12 at the front and rear of the outer shell. A directional wheel 431 is rotatably mounted at the end of each wheel support arm, and the directional wheels 431 on each star-shaped wheel bracket 432 are parallel to the protective net cover 12. Thus, the three directional wheels 431 form an equilateral triangular planetary wheel assembly that can revolve and rotate. In this way, even if only one person moves the fan, the worker only needs to lift the handle 32 on one side of the caster 41, so that the caster 41 is raised and the two directional wheels 431 of the stair-climbing triangular wheel assembly 43 touch the ground. When moving on a plane, the directional wheels 431 that are in contact with the ground rotate to move the fan. When the stair-climbing triangular wheel assembly 43 hits the step, the worker exerts upward force, and the shape wheel bracket rotates around the wheel cylinder, so the triangular wheel assembly revolves, achieving the "stair-climbing" effect.

[0024] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments and claims of this application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that, unless otherwise stated, “a plurality” means two or more; the terms “first,” “second,” “third,” etc., are used only to distinguish and not to describe a particular order or sequence, nor should they be construed as indicating or implying relative importance. The term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description relates to drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A portable large fan, characterized in that, include: The outer shell includes a side frame and a protective mesh fixed to the front and rear of the side frame; the side frame is a cylindrical shape formed by metal plates running through the front and back, with its central axis parallel to the horizontal direction; the outer shell has at least one crossbeam inside; the crossbeam passes through the center of the circular side frame and is fixed at both ends to the inner sidewall of the side frame; a bearing seat is provided in the middle of the crossbeam. The fan blades are located inside the housing, and the shafts of the fan blades are rotatably mounted on the bearing housing; A pull handle is fixed to the outer side wall of the left or right side of the side frame and located on the upper side of the crossbeam. At least two handles are fixed to the outer side walls of the left and right sides of the side frame, respectively, and are located below the crossbeam.

2. The fan according to claim 1, characterized in that, It also includes a movable handle, which is hinged to the middle of the left and right sides of the outer wall of the side frame via a hinge.

3. The fan according to claim 2, characterized in that, The hinge of the movable handle is provided with a limiting part, which is used to limit the movable handle to be extended to the maximum angle perpendicular to the side wall.

4. The fan according to claim 3, characterized in that, It also includes at least two sets of wheels, which are respectively mounted on the outer side walls of the left and right sides of the side frame via wheel brackets.

5. The fan according to claim 4, characterized in that, It also includes a motor that drives the fan blades to rotate, and the housing is provided with at least two vertical beams and a motor bracket fixed between the two vertical beams; The two vertical beams are parallel to each other and vertically arranged, with one end fixed to the surface of the horizontal beam and the other end fixed to the inner surface of the side frame; The motor bracket is horizontally arranged, with both ends fixed to the two vertical beams respectively, and the motor is fixed to the motor bracket; The motor's output shaft is equipped with a small pulley, and the fan blade's rotating shaft is equipped with a large pulley. The small pulley of the motor and the large pulley of the fan blade are connected by a transmission belt.

6. The fan according to claim 5, characterized in that, Of the two sets of wheels, the set on the same side as the handle includes at least two swivel wheels, and the set on the opposite side of the handle includes at least two directional wheels.

7. The fan according to claim 5, characterized in that, Of the two sets of wheels, the set of wheels on the same side as the handle includes at least two swivel wheels, and the set of wheels on the opposite side of the handle includes at least two sets of stair-climbing triangular wheels. Each set of stair-climbing triangular wheels includes a star-shaped wheel bracket and three directional wheels; the star-shaped wheel bracket has a wheel cylinder at its center and three wheel support arms on its outer periphery. The wheel cylinder is used to rotatably connect the star-shaped wheel bracket to the side frame, and each of the wheel support arms is rotatably provided with a directional wheel at its end; each star-shaped wheel bracket and each directional wheel on it are parallel to the protective net cover.

Images