A fan with adjustable blade angle

Abstract

The present invention proposes a fan with adjustable blade angle, comprising a shell, a motor, a turntable, a plurality of blades, a plurality of rotating rods and an angle adjustment device, wherein the motor is arranged in the shell, the turntable is arranged on the motor shaft, a plurality of openings are opened around the outer periphery of the turntable, the rotating rods are inserted in the openings, and the rotating rods can rotate relative to the turntable, the blades are fixed on the rotating rods, and the angle adjustment device is fixed on the turntable, and the angle adjustment device can drive the blades to rotate. The present invention provides a fan with adjustable blade angle, by providing an angle adjustment device, the angle adjustment device can drive the blades to rotate, so as to overcome the defect that the blade angle of the existing fan cannot be adjusted.

Description

Technical Field

[0001] The invention relates to the field of fans, and in particular to a fan with adjustable blade angles. Background Art

[0002] Electric fans are electrical devices that use motors to drive the blades to rotate to achieve air circulation. They are mainly used for heat dissipation and air circulation. They are widely used in homes, offices, shops, hospitals and other places, providing great convenience for people's work and life.

[0003] Different types and models of machines have different requirements for heat dissipation, and therefore require fans with different performances. However, the blades and hubs of existing cooling fans are integrally formed, so the inclination angle of the blades of the finished cooling fan relative to the axis of the hub is fixed, that is, the air outlet direction, air volume and air pressure of the fan cannot be adjusted. Therefore, it is difficult for this type of fan to adjust its air outlet direction, air volume and air pressure according to different requirements, and its compatibility is poor. Summary of the invention

[0004] In view of this, the present invention proposes a fan with adjustable blade angle to overcome the defect that the blade angle of the existing fan is not adjustable.

[0005] The technical solution of the present invention is implemented as follows: the present invention provides a fan with adjustable blade angle, including a shell, a motor, a turntable, multiple blades, multiple rotating rods and an angle adjustment device, the motor is arranged in the shell, the turntable is arranged on the motor shaft, a plurality of openings are opened around the outer periphery of the turntable, the rotating rods are inserted in the openings, and the rotating rods can rotate relative to the turntable, the blades are fixed on the rotating rods, and the angle adjustment device is fixed on the turntable, and the angle adjustment device can drive the blades to rotate.

[0006] On the basis of the above technical scheme, preferably, the angle adjustment device includes a servo motor, a fixed disk and a fixed ring, the servo motor is fixed at the center of the turntable, the fixed disk is fixed on the servo motor shaft, the servo motor can drive the fixed disk to rotate, the fixed ring is fixed on the outer wall of the turntable, a plurality of first grooves are opened on the outer wall of the fixed disk along the center of the circle, a plurality of second grooves are correspondingly opened on the fixed ring, the two ends of the fan blades are inserted in the first grooves and the second grooves, and the rotation of the fixed disk can drive the fan blades to rotate around the rotating rod.

[0007] Further preferably, the angle adjustment device also includes a plurality of first fixed blocks, a plurality of second fixed blocks, a plurality of third fixed blocks and a plurality of fourth fixed blocks, the first fixed blocks and the second fixed blocks are arranged in the first groove, the third fixed blocks and the fourth fixed blocks are arranged in the second groove, the first fixed blocks and the second fixed blocks are located on both sides of the fan blades, the third fixed blocks and the fourth fixed blocks are located on both sides of the fan blades, and the first fixed blocks, the second fixed blocks, the third fixed blocks and the fourth fixed blocks are made of rubber.

[0008] More preferably, the cross-sections of the first fixing block, the second fixing block, the third fixing block and the fourth fixing block close to one end of the fan blade are arc-shaped.

[0009] Further preferably, the first fixed block has a first inclined plane, the second fixed block has a second inclined plane, the third fixed block has a third inclined plane, and the fourth fixed block has a fourth inclined plane. The intersection lines of the first and second inclined planes with the fan blades are far away from the rotating rod, and the intersection lines of the third and fourth inclined planes with the fan blades are close to the rotating rod. The distance between the first and second inclined planes is smaller than the distance between the third and fourth inclined planes. The first inclined plane is parallel to the third inclined plane, and the second inclined plane is parallel to the fourth inclined plane. The distance between the plane where the third inclined plane is located and the rotating rod is consistent with the distance from the rotating rod to the plane where the end face of the fan blade is located on the side close to the third inclined plane. The distance between the plane where the fourth inclined plane is located and the rotating rod is consistent with the distance from the rotating rod to the plane where the end face of the fan blade is located on the side close to the fourth inclined plane.

[0010] More preferably, the angle between the first inclined surface and the end surface of the fixed disk is 5° to 45°, and the angle between the second inclined surface and the end surface of the fixed disk is 5° to 45°.

[0011] More preferably, the angle between the first inclined surface and the end surface of the fixed disk is 15°, and the angle between the second inclined surface and the end surface of the fixed disk is 15°.

[0012] More preferably, the first fixing block and the second fixing block are detachably fixed on the fixing plate, and the third fixing block and the fourth fixing block are detachably fixed on the rotating plate.

[0013] On the basis of the above technical solution, preferably, it further includes a supporting mechanism and a base, wherein the supporting mechanism is arranged on the top of the base, and the motor and the housing are both arranged on the supporting mechanism.

[0014] More preferably, the supporting mechanism includes a fixing rod, a sleeve and a bolt, the fixing rod is fixed on the base, the sleeve is sleeved on the fixing rod, the motor and the housing are both arranged on the sleeve, a threaded hole is opened on the sleeve, and the bolt is located in the threaded hole and conflicts with the fixing rod.

[0015] The fan with adjustable blade angle of the present invention has the following beneficial effects compared with the prior art:

[0016] (1) By providing a plurality of rotating rods and an angle adjustment device, the angle adjustment device can drive the fan blades to rotate, thereby overcoming the defect that the blade angle of the existing fan cannot be adjusted;

[0017] (2) By setting a servo motor, a fixed disk and a fixed ring, a plurality of first grooves are opened around the center of the circle on the outer wall of the fixed disk, and a plurality of second grooves are opened on the fixed ring accordingly. The two ends of the fan blade are inserted into the first groove and the second groove, and the fan blade can be driven to rotate around the rotating rod by rotating the fixed disk. In this scheme, the fan blade is fixed to the fixed disk, and the fixed ring is used to limit the fan blade to prevent the fan blade from rotating excessively;

[0018] (3) The first fixed block has a first inclined plane, the second fixed block has a second inclined plane, the third fixed block has a third inclined plane, and the fourth fixed block has a fourth inclined plane. The intersection lines of the first and second inclined planes with the fan blades are far away from the rotating rod, and the intersection lines of the third and fourth inclined planes with the fan blades are close to the rotating rod. The distance between the first inclined plane and the second inclined plane is smaller than the distance between the third inclined plane and the fourth inclined plane. The first inclined plane is parallel to the third inclined plane, the second inclined plane is parallel to the fourth inclined plane, and the distance between the plane where the third inclined plane is located and the rotating rod is The distance from the rotating rod to the plane where the end face of the fan blade close to the third inclined surface is consistent, and the distance between the plane where the fourth inclined surface is and the rotating rod is consistent with the distance from the rotating rod to the plane where the end face of the fan blade close to the fourth inclined surface is consistent. In this way, when the fan blade conflicts with the first fixed block and the fourth fixed block, the fan blade adheres to the first inclined surface and the fourth inclined surface, and when the fan blade conflicts with the second fixed block and the third fixed block, the fan blade adheres to the second inclined surface and the third inclined surface, so that the fan blade is fixed more firmly, and the conflict of relative points can prevent the fan blade from being broken when rotating at high speed;

[0019] (4) The first fixed block and the second fixed block are detachably fixed on the fixed plate, and the third fixed block and the fourth fixed block are detachably fixed on the turntable. In this way, the first fixed block, the second fixed block, the third fixed block and the fourth fixed block can be replaced according to the need for angle adjustment to achieve adjustment of different angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1It is a three-dimensional structural schematic diagram of a fan with adjustable blade angle according to the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of a rotating disk of a fan with adjustable blade angle according to the present invention;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of a servo motor of a fan with adjustable blade angle according to the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of an angle adjustment device of a fan with adjustable blade angle according to the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of a first fixing block, a second fixing block, a third fixing block and a fourth fixing block of a fan with adjustable blade angle according to the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, combined Figure 2-6 The embodiment of the present invention discloses a fan with adjustable blade angle, including a housing 1, a motor 2, a turntable 3, a plurality of blades 4, a plurality of rotating rods 5, an angle adjustment device 6, a supporting mechanism 7 and a base 8.

[0029] The housing 1 is used to protect the internal device of the fan. The fan with adjustable blade angle can be a small fan without a base or a large fan with a base.

[0030] The motor 2 and the turntable 3 are used to rotate the fan blades 4. Specifically, the motor 2 is arranged in the housing 1, and the turntable 3 is arranged on the rotating shaft of the motor 2.

[0031] The fan blades 4 are used to supply air by rotating.

[0032] The rotating rod 5 is used to adjust the angle of the fan blade 4. Specifically, a plurality of openings are provided around the outer periphery of the rotating disk 3, and the rotating rod 5 is inserted into the openings, and the rotating rod 5 can rotate relative to the rotating disk 3, and the fan blade 4 is fixed on the rotating rod 5.

[0033] The angle adjustment device 6 is used to rotate the fan blade 4. The angle adjustment device 6 is fixed on the turntable 3, and the angle adjustment device 6 can drive the fan blade 4 to rotate. The angle adjustment device 6 can be a linear module, a linear motor or other device, and its telescopic end is fixed on the fan blade 4 to drive the fan blade 4 to rotate.

[0034] In order to make a fan with adjustable blade angle, all blades 4 can be driven to rotate by a power source. More specifically, the angle adjustment device 6 includes a servo motor 61, a fixed disk 62 and a fixed ring 63. The servo motor 61 is fixed at the center of the turntable 3, and the fixed disk 62 is fixed on the rotating shaft of the servo motor 61. The servo motor 61 can drive the fixed disk 62 to rotate. The fixed ring 63 is fixed on the outer wall of the turntable 3. A plurality of first grooves 621 are opened on the outer wall of the fixed disk 62 along the center of the circle. A plurality of second grooves 631 are correspondingly opened on the fixed ring 63. The two ends of the blades 4 are inserted in the first groove 621 and the second groove 631. The rotation of the fixed disk 62 can drive the blades 4 to rotate around the rotating rod 5. The servo motor 61 rotates back and forth to rotate the fixed disk 62, thereby driving the blades 4 to rotate around the rotating rod 5. In this scheme, the blades 4 are fixed to the fixed disk 62, and the fixed ring 63 is used to limit the blades 4 to prevent the blades 4 from rotating excessively.

[0035] Since the fan blades are subjected to greater pressure during high-speed rotation, the fan blades 4 are fixed to the fixed disk 62, and since the servo motor 61 is designed to be smaller according to the size requirements of the fan, a series of problems such as breakage of the fixed disk 62 and the rotating shaft of the servo motor 61 may occur after a period of use. Therefore, it is necessary to use the fixed disk 62 and the fixed ring 63 to jointly resist and fix the fan blades 4. More specifically, the angle adjustment device 6 also includes a plurality of first fixed blocks 64, a plurality of second fixed blocks 65, a plurality of third fixed blocks 66 and a plurality of fourth fixed blocks 67, the first fixed blocks 64 and the second fixed blocks 65 are arranged in the first groove 621, the third fixed blocks 66 and the fourth fixed blocks 67 are arranged in the second groove 631, the first fixed blocks 64 and the second fixed blocks 65 are located on both sides of the fan blades 4, the third fixed blocks 66 and the fourth fixed blocks 67 are located on both sides of the fan blades, and the first fixed blocks 64, the second fixed blocks 65, the third fixed blocks 66 and the fourth fixed blocks 67 are made of rubber. In this solution, by rotating the fixed disk 62, the fan blade 4 can be in conflict with the first fixed block 64 and the fourth fixed block 67, or the fan blade 4 can be in conflict with the second fixed block 65 and the third fixed block 66, so that the fixed disk 62 and the fixed ring 63 can jointly conflict and fix the fan blade 4, and the fan blade 4 can be adjusted at two angles at the same time. In order to increase the friction force and prevent damage to the surface of the fan blade 4, the first fixed block 64, the second fixed block 65, the third fixed block 66 and the fourth fixed block 67 are made of rubber.

[0036] To prevent the surface of the fan blade 4 from being damaged, more specifically, the cross-sections of the first fixing block 64 , the second fixing block 65 , the third fixing block 66 and the fourth fixing block 67 close to one end of the fan blade 4 are arc-shaped.

[0037] To make the blade 4 more firmly fixed. More specifically, the first fixing block 64 has a first inclined surface 641, the second fixing block 65 has a second inclined surface 651, the third fixing block 66 has a third inclined surface 661, and the fourth fixing block 67 has a fourth inclined surface 671. The intersection of the first inclined surface 641 and the second inclined surface 651 with the blade 4 is far away from the rotating rod 5, and the intersection of the third inclined surface 661 and the fourth inclined surface 671 with the blade 4 is close to the rotating rod 5. The distance between the first inclined surface 641 and the second inclined surface 651 is less than the distance between the third inclined surface 661 and the fourth inclined surface 671. 661 and the fourth inclined surface 671, the first inclined surface 641 is parallel to the third inclined surface 661, the second inclined surface 651 is parallel to the fourth inclined surface 671, the distance between the plane where the third inclined surface 661 is located and the rotating rod 5 is consistent with the distance between the rotating rod 5 and the plane where the end surface of the fan blade 4 close to the third inclined surface 661 is located, and the distance between the plane where the fourth inclined surface 671 is located and the rotating rod 5 is consistent with the distance between the rotating rod 5 and the plane where the end surface of the fan blade 4 close to the fourth inclined surface 671 is located. In this way, when the fan blade 4 conflicts with the first fixed block 64 and the fourth fixed block 67, the fan blade 4 is attached to the first inclined surface 641 and the fourth inclined surface 671, and when the fan blade 4 conflicts with the second fixed block 65 and the third fixed block 66, the fan blade 4 is attached to the second inclined surface 651 and the third inclined surface 661, so that the fan blade 4 is fixed more firmly, and the conflict at the relative points can prevent the fan blade 4 from being broken when rotating at a high speed.

[0038] To achieve a better wind output effect of the fan blades, more specifically, the angle between the first inclined surface 641 and the end surface of the fixing plate 62 is 5° to 45°, and the angle between the second inclined surface 651 and the end surface of the fixing plate 62 is 5° to 45°.

[0039] Preferably, the angle between the first inclined surface 641 and the end surface of the fixed plate 62 is 15°, and the angle between the second inclined surface 651 and the end surface of the fixed plate 62 is 15°. By rotating the fan blade 4, two angles of positive and negative 15° can be formed, so that the air outlet angle of the fan can be adjusted, and the air volume and air pressure are also more appropriate.

[0040] To achieve adjustment at different angles. The first fixed block 64 and the second fixed block 65 are detachably fixed on the fixed disk 62, and the third fixed block 66 and the fourth fixed block 67 are detachably fixed on the turntable 3. In this way, the first fixed block 64, the second fixed block 65, the third fixed block 66 and the fourth fixed block 67 can be replaced according to the angle adjustment needs to achieve adjustment at different angles, so as to change the air outlet angle, air volume and air pressure of the fan. In actual use, generally only two angles of adjustment are required to meet the requirements. Too many angle adjustment options make it difficult to select the optimal angle option. The detachable fixing method is: threaded holes are provided on the first fixed block 64, the second fixed block 65, the third fixed block 66, the fourth fixed block 67, the fixed disk 62 and the turntable 3, and the first fixed block 64, the second fixed block 65, the third fixed block 66 and the fourth fixed block 67 are fixed in the threaded holes of the fixed disk 62 and the turntable 3 by bolts.

[0041] The support mechanism 7 is used to support the motor 2. Specifically, the support mechanism 7 is arranged on the top of the base 8, and the motor 2 and the housing 1 are both arranged on the support mechanism 7.

[0042] To make the fan height adjustable. More specifically, the support mechanism 7 includes a fixing rod 71, a sleeve 72 and a bolt 73. The fixing rod 71 is fixed to the base 8. The sleeve 72 is sleeved on the fixing rod 71. The motor 2 and the housing 1 are both arranged on the sleeve 72. The sleeve 72 is provided with a threaded hole. The bolt 73 is located in the threaded hole and conflicts with the fixing rod 71. By loosening the bolt 73, adjusting the relative position between the fixing rod 71 and the sleeve 72, and then tightening the bolt 73, the fan height can be adjusted.

[0043] The base 8 is used to support the fan.

[0044] The working principle of a fan with adjustable blade angle of the present invention is: turn on the servo motor 61 and rotate the fixed disk 62 back and forth, so that the fan blade 4 can be attached to the first inclined surface 641 and the fourth inclined surface 671 when it conflicts with the first fixed block 64 and the fourth fixed block 67, or the fan blade 4 can be attached to the second inclined surface 651 and the third inclined surface 661 when it conflicts with the second fixed block 65 and the third fixed block 66. In this way, the angle of the fan blade can be adjusted in two directions. If the angle needs to be changed, the adjustment of different angles can be achieved by replacing the first fixed block 64, the second fixed block 65, the third fixed block 66 and the fourth fixed block 67.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan with adjustable blade angle, characterized in that: It comprises a housing (1), a motor (2), a rotating disk (3), a plurality of fan blades (4), a plurality of rotating rods (5) and an angle adjustment device (6); The motor (2) is arranged in the housing (1), the rotating disk (3) is arranged on the rotating shaft of the motor (2), a plurality of openings are opened around the outer periphery of the rotating disk (3), a rotating rod (5) is inserted into the opening, and the rotating rod (5) can rotate relative to the rotating disk (3), and the fan blade (4) is fixed on the rotating rod (5); The angle adjustment device (6) is fixed on the rotating disk (3), and the angle adjustment device (6) can drive the fan blades (4) to rotate; The angle adjustment device (6) comprises a servo motor (61), a fixed disk (62) and a fixed ring (63); the servo motor (61) is fixed at the center of the rotating disk (3); the fixed disk (62) is fixed on the rotating shaft of the servo motor (61); the servo motor (61) can drive the fixed disk (62) to rotate; the fixed ring (63) is fixed on the outer wall of the rotating disk (3); a plurality of first grooves (621) are formed on the outer wall of the rotating disk (62) around the center of the circle; a plurality of second grooves (631) are correspondingly formed on the fixed ring (63); two ends of the fan blade (4) are inserted into the first groove (621) and the second groove (631); the rotation of the fixed disk (62) can drive the fan blade (4) to rotate around the rotating rod (5); The angle adjustment device (6) further comprises a plurality of first fixing blocks (64), a plurality of second fixing blocks (65), a plurality of third fixing blocks (66) and a plurality of fourth fixing blocks (67); the first fixing blocks (64) and the second fixing blocks (65) are arranged in the first groove (621); the third fixing blocks (66) and the fourth fixing blocks (67) are arranged in the second groove (631); the first fixing blocks (64) and the second fixing blocks (65) are located on both sides of the fan blade (4); the third fixing blocks (66) and the fourth fixing blocks (67) are located on both sides of the fan blade; the first fixing blocks (64), the second fixing blocks (65), the third fixing blocks (66) and the fourth fixing blocks (67) are made of rubber; The cross-sections of the first fixing block (64), the second fixing block (65), the third fixing block (66) and the fourth fixing block (67) close to one end of the fan blade (4) are arc-shaped; The first fixing block (64) has a first inclined surface (641), the second fixing block (65) has a second inclined surface (651), the third fixing block (66) has a third inclined surface (661), and the fourth fixing block (67) has a fourth inclined surface (671); the intersection lines of the first inclined surface (641) and the second inclined surface (651) with the fan blade (4) are far away from the rotating rod (5); the intersection lines of the third inclined surface (661) and the fourth inclined surface (671) with the fan blade (4) are close to the rotating rod (5); the distance between the first inclined surface (641) and the second inclined surface (651) is less than the distance between the third inclined surface (661) and the fourth inclined surface (671). The first inclined surface (641) is parallel to the third inclined surface (661), the second inclined surface (651) is parallel to the fourth inclined surface (671), the distance between the plane where the third inclined surface (661) is located and the rotating rod (5) is consistent with the distance between the rotating rod (5) and the plane where the end surface of the fan blade (4) close to the third inclined surface (661) is located, and the distance between the plane where the fourth inclined surface (671) is located and the rotating rod (5) is consistent with the distance between the plane where the rotating rod (5) is located and the end surface of the fan blade (4) close to the fourth inclined surface (671); The included angle between the first inclined surface (641) and the end surface of the fixed disk (62) is 15°, and the included angle between the second inclined surface (651) and the end surface of the fixed disk (62) is 15°.

2. A fan with adjustable blade angle as claimed in claim 1, characterized in that: The first fixing block (64) and the second fixing block (65) are detachably fixed on the fixing plate (62), and the third fixing block (66) and the fourth fixing block (67) are detachably fixed on the rotating plate (3).

3. A fan with adjustable blade angle as claimed in claim 1, characterized in that: It also includes a support mechanism (7) and a base (8), wherein the support mechanism (7) is arranged on the top of the base (8), and the motor (2) and the housing (1) are both arranged on the support mechanism (7).

4. A fan with adjustable blade angle as claimed in claim 3, characterized in that: The support mechanism (7) comprises a fixing rod (71), a sleeve (72) and a bolt (73); the fixing rod (71) is fixed on the base (8); the sleeve (72) is sleeved on the fixing rod (71); the motor (2) and the housing (1) are both arranged on the sleeve (72); a threaded hole is formed on the sleeve (72); the bolt (73) is located in the threaded hole and contacts the fixing rod (71).

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