Local fan capable of adjusting blade angle

Abstract

The utility model relates to a local fan capable of adjusting blade angles, which belongs to the technical field of fans and comprises a casing, a motor and a hub are arranged in the casing, the hub is fixedly connected with an output shaft of the motor, a plurality of fixing grooves are arranged on the axial surface of the hub, blades are arranged in the fixing grooves, and the blades are arranged in the fixing grooves. According to the utility model, the blades are movably connected with the hub, so that the angles of the blades can be adjusted, and the adaptability of the local fan to adjusting places is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a local fan with adjustable blade angles. Background Art

[0002] A large amount of dust will be generated during mine excavation, and a large amount of explosive and toxic gases such as gas are hidden underground. Therefore, fresh air needs to be transported to the excavation face through ventilators. Ventilators generally include main fans and local fans. Local fans are mainly used in mine excavation working faces. Since local fans are small in size and light in weight, the blades and hubs of local fans mostly adopt a fixed welded structure. In order to meet the ventilation requirements of the excavation face, local fans are adapted to different ventilation scenarios. In the prior art, local fans with fixed blade structures can no longer meet the needs. Therefore, it is urgent to design a local fan with adjustable blade angle to solve the problems in the prior art. Utility Model Content

[0003] In order to solve the above problems, the technical solution adopted by the utility model is:

[0004] A local fan with adjustable blade angle comprises a casing, wherein a motor and a hub are arranged in the casing, the hub is fixedly connected to the motor output shaft, a plurality of fixing grooves are arranged on the axial surface of the hub, blades are arranged in the fixing grooves, and the blades are movably connected to the fixing grooves.

[0005] According to the above technical solution, it is further preferred that the blade includes a fan blade and a base, the fan blade is fixedly connected to the base, and the base is fixedly connected to the fixing groove.

[0006] Preferably, four arc-shaped holes are arranged in the fixing groove, four screw holes are arranged on the base, and the base is fixedly connected with the arc-shaped holes by bolts.

[0007] Preferably, center lines of the four arc-shaped holes are cocircular, and the four arc-shaped holes are evenly distributed.

[0008] Preferably, a positioning hole is provided at the center of the fixing groove, and a convex pin is provided at the center of the base, and the convex pin is plug-fittedly connected to the positioning hole.

[0009] Preferably, a scale line is arranged at the outer edge of the fixing groove, and an indicator mark is arranged on the base, and the indicator mark faces the scale line.

[0010] Preferably, the fixing groove is a circular groove.

[0011] Preferably, the base is a circular base.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a local fan with adjustable blade angle. The blades of the utility model are movably connected to the hub, and the blade angle can be adjusted to improve the adaptability of the local fan to the adjustment site.

[0014] 2. The utility model provides a local fan with adjustable blade angle. The blades and the hub of the utility model are detachable structures, which solves the problem of inconvenient maintenance of fixed structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the longitudinal cross-sectional structure of the device of the utility model;

[0016] Figure 2 This is a schematic diagram of the hub shaft surface structure of the utility model device;

[0017] Figure 3 This is a schematic diagram of the fixing groove structure of the utility model device;

[0018] Figure 4 This is a schematic diagram of the blade structure of the utility model device.

[0019] In the figure: 1, casing, 2, motor, 3, hub, 4, fixing groove, 5, blade, 6, fan blade, 7, base, 8, arc hole, 9, positioning hole, 10, protruding pin, 11, scale line, 12, indicator mark, 13, screw hole. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0021] like Figure 1 to Figure 4 As shown, the utility model provides a local fan with adjustable blade angle, comprising a housing 1, a motor 2 and a hub 3 are arranged in the housing 1, the hub 3 is fixedly connected to the output shaft of the motor 2, a plurality of fixing grooves 4 are arranged on the axial surface of the hub 3, blades 5 are arranged in the fixing grooves 4, and the blades 5 are movably connected to the fixing grooves 4. In the embodiment of the utility model, the blades of the local fan are movably connected to the hub, the angle of the blades can be adjusted arbitrarily, and the adaptability of the local fan to the adjustment site is improved.

[0022] The blade 5 includes a fan blade 6 and a base 7, wherein the fan blade 6 is fixedly connected to the base 7, and the base 7 is fixedly connected to the fixing groove 4. Four arc holes 8 are arranged in the fixing groove 4, and four screw holes 13 are arranged on the base 7, and the base 7 is fixedly connected with the arc holes 8 by bolts. In the utility model, the base 7 and the fixing groove 4 are fixedly connected together by the arc holes 8 and the screw holes 13. When it is necessary to adjust the blade angle, the bolts are loosened, the base 7 is rotated to a certain angle, and the base 7 and the fixing groove 4 are reconnected by bolts to achieve the purpose of blade angle adjustment. The utility model has a simple and practical blade angle adjustment structure, which not only solves the technical problem of blade angle adjustment, but also meets the difficulty of the local fan having a small size and a simple structure, and is not suitable for installing other complex adjustment structures.

[0023] The center lines of the four arc-shaped holes 8 are cocircular, and the four arc-shaped holes 8 are evenly distributed.

[0024] A positioning hole 9 is provided at the center of the fixing groove 4 , and a convex pin 10 is provided at the center of the base 7 . The convex pin 10 is plug-fittedly connected to the positioning hole 9 .

[0025] A scale line 11 is arranged at the outer edge of the fixing groove 4 , and an indication mark 12 is arranged on the base 7 , and the indication mark 12 faces the scale line 11 .

[0026] The fixing groove 4 is a circular groove.

[0027] The base 7 is a circular base.

[0028] Of course, the above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A local fan with adjustable blade angle, comprising a housing (1), characterized in that: The housing (1) is provided with a motor (2) and a wheel hub (3), the wheel hub (3) being fixedly connected to the output shaft of the motor (2), a plurality of fixing grooves (4) being provided on the axial surface of the wheel hub (3), a blade (5) being fixedly provided in the fixing groove (4), the blade (5) being movably connected to the fixing groove (4); the blade (5) comprising a fan blade (6) and a base (7), the fan blade (6) being fixedly connected to the base (7), and the base (7) being fixedly connected to the fixing groove (4); Four arc-shaped holes (8) are arranged in the fixing groove (4), four screw holes (13) are arranged on the base (7), and the base (7) is fixedly connected with the arc-shaped holes (8) by bolts.

2. The local fan with adjustable blade angle according to claim 1, characterized in that: The center lines of the four arc-shaped holes (8) are cocircular, and the four arc-shaped holes (8) are evenly distributed.

3. The local fan with adjustable blade angle according to claim 1, characterized in that: A positioning hole (9) is provided at the center of the fixing groove (4), and a convex pin (10) is provided at the center of the base (7), and the convex pin (10) is plug-fittedly connected to the positioning hole (9).

4. The local fan with adjustable blade angle according to claim 1, characterized in that: A scale line (11) is provided at the outer edge of the fixing groove (4), and an indication mark (12) is provided on the base (7), wherein the indication mark (12) faces the scale line (11).

5. The local fan with adjustable blade angle according to claim 4, characterized in that: The fixing groove (4) is a circular groove.

6. The local fan with adjustable blade angle according to claim 4, characterized in that: The base (7) is a circular base.

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