CN109882433B

CN109882433B - Fan

Info

Publication number: CN109882433B
Application number: CN201910232536.9A
Authority: CN
Inventors: 朱岗盛
Original assignee: Ningbo Julang Draught Fan Co ltd
Current assignee: Ningbo Julang Draught Fan Co ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-10-09
Anticipated expiration: 2039-03-26
Also published as: CN109882433A

Abstract

The invention relates to the technical field of fans, in particular to a fan which comprises a shell, a mounting frame positioned in the shell, a first motor arranged on the mounting frame, a front protective grid arranged at the front end of the shell, a rear protective grid arranged at the rear end of the shell, blades, a fixed shaft, a blade frame of a hollow structure and a locking mechanism positioned in the blade frame, wherein the front end of the blade frame is rotatably arranged on the front protective grid, and the rear end of the blade frame is rotatably arranged on the mounting frame and is connected with an output shaft of the first motor; the fixed shaft is vertically and rotatably connected to the outer side of the blade frame, one end of the fixed shaft is connected with the blades, and the other end of the fixed shaft penetrates into the blade frame and is connected with a locking mechanism used for limiting the rotation of the fixed shaft. The invention has simple structure and reasonable layout; the angle of the blade can be changed only by releasing the locking function of the locking mechanism on the fixed shaft, rotating the fixed shaft or the blade, and finally locking the fixed shaft through the locking mechanism, so that the operation is simple and convenient.

Description

Fan

Technical Field

The invention relates to the technical field of fans, in particular to a fan.

Background

The fan is a device for converting electric energy into air kinetic energy, can play roles of cooling, ventilating, exhausting and the like, and is widely applied to industry. When the fan runs, the wind quantity, the wind pressure and the power of the fan can be accurately changed by changing the angle of the blade of the fan, so that the fan is widely applied to cooling large-scale equipment.

In the prior art, most of the angles of the blades of the fan cannot be changed, only a small number of the angles of the blades of the fan can be adjusted, and the blades of the fan need to be manually disassembled and adjusted, so that the operation is complex, and time and labor are wasted. To this end, we propose a fan.

Disclosure of Invention

The invention mainly aims to provide a fan to solve the defects in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a fan comprises a shell, a mounting frame positioned in the shell, a first motor arranged on the mounting frame, a front protective grating arranged at the front end of the shell, a rear protective grating arranged at the rear end of the shell, blades, a fixed shaft, a blade frame of a hollow structure and a locking mechanism positioned in the blade frame, wherein the front end of the blade frame is rotatably arranged on the front protective grating, and the rear end of the blade frame is rotatably arranged on the mounting frame and is connected with an output shaft of the first motor; the fixed shaft is vertically and rotatably connected to the outer side of the blade frame, one end of the fixed shaft is connected with the blades, and the other end of the fixed shaft penetrates through the inside of the blade frame and is connected with the locking mechanism used for limiting the rotation of the fixed shaft.

The invention has the beneficial effects that: the invention has simple structure and reasonable layout; the angle of the blade can be changed only by releasing the locking function of the locking mechanism on the fixed shaft, then rotating the fixed shaft or the blade, and finally locking the fixed shaft through the locking mechanism, so that the operation is simple and convenient.

Preferably, the locking mechanism comprises a first bevel gear, a second bevel gear and a connecting block integrally connected to the front end of the second bevel gear, the first bevel gear is connected to the fixed shaft, and the connecting block can be connected to the inside of the blade frame in a front-back sliding manner; when the connecting block slides backwards, the second bevel gear and the first bevel gear are meshed with each other; when the connecting block slides forwards, the second bevel gear and the first bevel gear are separated from each other. The advantages are that: because the connecting block can only slide back and forth, when the connecting block slides backwards, the second bevel gear and the first bevel gear are meshed with each other, so that the first bevel gear is locked, the rotation of the fixed shaft is limited, and the change of the angle of the blade is avoided; when the connecting block slides forwards, the second bevel gear and the first bevel gear are separated from each other, so that the locking of the fixed shaft is released, and the fixed shaft or the blades are rotated to change the angle of the blades.

Preferably, the connecting block is connected inside the blade frame in a front-back sliding manner, that is, a plurality of positioning sliding blocks are integrally arranged outside the connecting block, a plurality of positioning sliding grooves are formed in the blade frame along the front-back end direction, and the positioning sliding blocks are matched in the positioning sliding grooves in a sliding manner. The advantages are that: the connecting block is ensured to only slide along the front end and the rear end, and the first bevel gear cannot be locked due to the rotation of the connecting block.

Preferably, the blade frame further comprises a driving mechanism for driving the fixed shaft to rotate, the driving mechanism comprises a rotating shaft, a third bevel gear arranged on the rotating shaft, a convex block integrally connected to the rear end face of the third bevel gear, and a clamping groove located on the inner side face of the rear end of the blade frame, a through hole is arranged on the rear end face of the blade frame in a penetrating manner, the rotating shaft and the third bevel gear are both located in the blade frame, and the rear end of the rotating shaft is connected with the output shaft of the first motor after penetrating through the through hole; the first motor can be connected with the mounting frame in a front-back sliding mode, when the first motor slides forwards, the protruding block and the clamping groove are separated from each other, and the third bevel gear is meshed with the first bevel gear; when the first motor slides backwards, the third bevel gear and the first bevel gear are separated from each other, and the convex block and the clamping groove are matched with each other. The advantages are that: when the first motor slides forwards, the lug and the clamping groove are separated from each other, the rotating shaft cannot drive the blade frame to rotate, the third bevel gear is meshed with the first bevel gear, and the rotating shaft can drive the first bevel gear to rotate through the third bevel gear, so that the angle of the blade is changed; when the first motor slides backwards, the third bevel gear and the first bevel gear are separated from each other, the protruding blocks and the clamping grooves are matched with each other, and the rotating shaft can continue to drive the blade frame to rotate.

Preferably, the front end of the rotating shaft is rotatably connected to the second bevel gear through a first bearing. The advantages are that: when the first motor slides backwards, the front end of the rotating shaft drives the second bevel gear to move backwards, so that the first bevel gear is automatically locked; when the first motor slides forwards, the front end of the rotating shaft drives the second bevel gear to move forwards, so that the locking of the first bevel gear is automatically released.

Preferably, the first motor is connected to the mounting frame in a front-back sliding manner, namely, a sliding groove is formed in the mounting frame along the front-back end direction of the mounting frame, and a sliding block is arranged on the first motor and connected to the sliding groove in a sliding manner. The advantages are that: the sliding block and the sliding groove are matched to realize the forward and backward sliding of the first motor.

Preferably, be equipped with on the mounting bracket and be used for the drive the gliding drive arrangement of slider, drive arrangement includes second motor, lead screw and worm gear, the lead screw along the front and back end direction install in on the first motor, the second motor install in on the mounting bracket, just the second motor passes through the worm gear with the lead screw links to each other. The advantages are that: the first motor can be automatically driven by the second motor to slide back and forth.

Preferably, the mounting frame is provided with a limiting sliding groove arranged along the front end and the rear end of the mounting frame, a limiting sliding block is arranged between the first motor and the lead screw, and the limiting sliding block is matched with the inside of the limiting sliding groove in a sliding manner. The advantages are that: under the matching of the limiting sliding groove and the limiting sliding block, the matching precision between the convex block and the clamping groove, the meshing degree between the second bevel gear and the first bevel gear and the meshing degree between the third bevel gear and the first bevel gear are improved.

Preferably, a second bearing is arranged between the fixed shaft and the blade frame. The advantages are that: the rotation of the fixed shaft is convenient to realize.

Preferably, a third bearing is arranged between the blade frame and the front protective grating, and a fourth bearing is arranged between the blade frame and the mounting frame. The advantages are that: facilitating the rotation of the blade frame.

Drawings

FIG. 1 is a perspective view of a blower in accordance with a preferred embodiment of the present invention;

FIG. 2 is an exploded schematic view (in a rear view) of a blower in accordance with a preferred embodiment of the present invention;

FIG. 3 is an exploded schematic view (in a rear view) of a blade holder portion according to a preferred embodiment of the present invention;

FIG. 4 is an exploded schematic view (in a front view) of a blade shelf portion according to a preferred embodiment of the present invention;

fig. 5 and 6 are schematic diagrams illustrating a preferred embodiment of the present invention.

Detailed Description

The following further describes a specific implementation of the embodiment of the present invention with reference to the drawings of the embodiment of the present invention. The following examples are only used to illustrate the technical solutions of the present embodiments more clearly, and the protection scope of the present invention is not limited thereby.

Referring to fig. 1 to 6, in an embodiment of the present invention, a fan includes a housing 1, a mounting frame 11, a front protection grid 12, a rear protection grid 13, a first motor 2, a blade 3, a fixed shaft 4, a hollow blade frame 5, a locking mechanism 6, a driving mechanism 7, and a driving device 8; the mounting rack 11 is welded inside the outer shell 1, and reinforcing treatment is carried out between the mounting rack 11 and the outer shell 1 through reinforcing ribs 600; the front protection grille 12 is mounted at the front end of the shell 1 through screws, and the rear protection grille 13 is mounted at the rear end of the shell 1 through screws (the front refers to the direction from the rear protection grille 13 to the front protection grille 12, the rear refers to the direction from the front protection grille 12 to the rear protection grille 13, and the same applies below); the blade shelf 5 with a hollow structure consists of a body 501, a front cover 502 and a rear cover 503, the front end of the blade shelf 5 is rotatably mounted on the front protective grid 12, namely, the front end of the blade shelf is rotatably mounted on the front protective grid 12 through a front shaft 5021 on the front cover 502; the rear end of the blade frame 5 is rotatably mounted on the mounting frame 11, that is, rotatably mounted on the mounting frame 11 through the rear axle 5031 of the rear cover 503; the fixing shaft 4 is vertically and rotatably connected to the outer side of the blade frame 5, one end of the fixing shaft 4 is connected with the blade 3 through a bolt, and the other end of the fixing shaft 4 penetrates into the blade frame 5 and is connected with the locking mechanism 6 for limiting the rotation of the fixing shaft 4.

In an embodiment, the locking mechanism 6 includes a first bevel gear 61, a second bevel gear 62, and a connecting block 63 integrally connected to a front end of the second bevel gear 62, the first bevel gear 61 is connected to the fixed shaft 4, the connecting block 63 is slidably connected to the inside of the blade frame 5 in the front and back direction, that is, four positioning sliders 631 are integrally provided on an outer side of the connecting block 63, and four positioning sliding grooves 51 are provided in the inside of the blade frame 5 along the front and back direction thereof (the number of the positioning sliders 631 and the positioning sliding grooves 51 is not limited thereto, and may be any other number), and the positioning sliders 631 are slidably matched in the positioning sliding grooves 51; when the connecting block 63 slides backwards, the second bevel gear 62 and the first bevel gear 61 are meshed with each other; when the connecting block 63 slides forward, the second bevel gear 62 and the first bevel gear 61 are separated from each other.

In an embodiment, the driving mechanism 7 includes a rotating shaft 71, a third bevel gear 72 mounted on the rotating shaft 71, four protrusions 721 integrally connected to a rear end surface of the third bevel gear 72, and four engaging slots 52 located on an inner side surface of a rear end of the blade frame 5 (the number of the protrusions 721 and the engaging slots 52 is preferably four, but is not limited thereto, and may be other numbers), a through hole 53 is formed through the rear end surface of the blade frame 5, the rotating shaft 71 and the third bevel gear 72 are both located inside the blade frame 5, the rear end of the rotating shaft 71 penetrates through the through hole 53 and then is connected to an output shaft of the first motor 2 through a coupling 500, and a front end of the rotating shaft 71 is rotatably connected to the second bevel gear 62 through a first bearing 100; the first motor 2 can be connected to the mounting frame 11 in a front-back sliding manner, that is, a sliding groove 111 is formed in the mounting frame 11 along the front-back end direction of the mounting frame, a sliding block 21 is arranged on the first motor 2, and the sliding block 21 is connected to the sliding groove 111 in a sliding manner; when the first motor 2 slides forward, the projection 721 and the catch 52 are separated from each other, the second bevel gear 62 and the first bevel gear 61 are separated from each other, and the third bevel gear 72 and the first bevel gear 61 are engaged with each other; when the first motor 2 slides backwards, the third bevel gear 72 and the first bevel gear 61 are separated from each other, the second bevel gear 62 and the first bevel gear 61 are engaged with each other, and the protrusion 721 and the engaging groove 52 are matched with each other.

In an embodiment, the driving device 8 includes a second motor 81, a lead screw 82 and a worm gear 83, the lead screw 82 is installed on the first motor 2 along a front-rear end direction, the second motor 81 is installed on the mounting bracket 11, and the second motor 81 is connected with the lead screw 82 through the worm gear 83, so that the second motor 81 automatically drives the first motor 2 to slide back and forth.

In an embodiment, the mounting bracket 11 is provided with a limiting sliding groove 112 arranged along the front and rear end directions thereof, a limiting sliding block 22 is arranged between the first motor 2 and the lead screw 82, the limiting sliding block 22 is slidably matched in the limiting sliding groove 112, and under the matching of the limiting sliding groove 112 and the limiting sliding block 22, the matching precision between the protrusion 721 and the slot 52, the meshing degree between the second bevel gear 62 and the first bevel gear 61, and the meshing degree between the third bevel gear 72 and the first bevel gear 61 are improved.

In an embodiment, a second bearing 200 is disposed between the fixed shaft 4 and the blade holder 5, so as to facilitate the rotation of the fixed shaft 4.

In an embodiment, a third bearing 300 is disposed between the blade frame 5 and the front protective grid 12, a fourth bearing 400 is disposed between the blade frame 5 and the mounting frame 11, and the rotation of the blade frame 5 is facilitated under the action of the third bearing 300 and the fourth bearing 400.

In an embodiment, the first motor 2 and the second motor 81 are preferably step motors, and since the step motors are actuators for converting electric pulses into angular displacement, the angle of the blade 3 can be precisely adjusted by precisely controlling the rotation angle of the first motor 2, and the distance of the first motor 2 moving back and forth can be precisely adjusted by precisely controlling the rotation angle of the second motor 81.

The working principle is as follows: as shown in fig. 5 and 6: the worm gear 83 is driven by the second motor 81 to drive the lead screw 82 to move forward, as the lead screw 82 is connected with the first motor 2 through the limit slide block 22, the first motor 2 is forced to move forward and far along the slide groove 111 (in this process, the limit slide block 22 is slidably matched in the limit slide groove 112, and the positioning slide block 631 on the connecting block 63 is slidably matched in the positioning slide groove 51), and further the third bevel gear 72 and the second bevel gear 62 are pushed to move forward, so that the projection 721 can be gradually separated from the slot 52, the second bevel gear 62 can be gradually separated from the first bevel gear 61 until the limit slide block 22 slides to the foremost end of the limit slide groove 112, at this time, the projection 721 and the slot 52 are separated from each other, and the second bevel gear 62 and the first bevel gear 61 are separated from each other, the third bevel gear 72 and the first bevel gear 61 are meshed with each other (in this state, the first motor 2 rotates, the blade frame 5 does not rotate along with the blade frame, and the blade 3 rotates along with the blade frame), and then the first bevel gear 61 is driven to rotate by a certain angle through the forward rotation of the first motor 2, so that the angle of the blade 3 is changed; after the angle of the blade 3 is proper, the second motor 81 drives the worm gear 83 to drive the lead screw 82 to move backwards, so as to drive the first motor 2 to slide backwards, and further pull the third bevel gear 72 and the second bevel gear 62 to move backwards, so that the third bevel gear 72 can be gradually separated from the first bevel gear 61, and after the third bevel gear 72 is completely separated from the first bevel gear 61, and before the second bevel gear 62 is not in contact with the first bevel gear 61, the first motor 2 is controlled to rotate reversely by the same angle, so that the positioning between the projection 721 and the slot 52 is accurate; until the limiting slide block 22 slides to the rearmost end of the limiting slide groove 112, at this time, the protrusion 721 and the engaging groove 52 are matched with each other (in this state, the first motor 2 rotates, and the blade frame 5 rotates accordingly), and the second bevel gear 62 and the first bevel gear 61 are engaged with each other, so as to lock the blade 3, thereby preventing the blade 3 from changing its angle due to the reaction force of air during the operation of the fan.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A fan comprises a shell (1), a mounting frame (11) positioned in the shell (1), a first motor (2) arranged on the mounting frame (11), a front protection grid (12) arranged at the front end of the shell (1), a rear protection grid (13) arranged at the rear end of the shell (1) and blades (3), and is characterized by further comprising a fixed shaft (4), a blade frame (5) with a hollow structure and a locking mechanism (6) positioned in the blade frame (5), wherein the front end of the blade frame (5) is rotatably arranged on the front protection grid (12), and the rear end of the blade frame (5) is rotatably arranged on the mounting frame (11) and connected with an output shaft of the first motor (2); the fixed shaft (4) is vertically and rotatably connected to the outer side of the blade frame (5), one end of the fixed shaft (4) is connected with the blade (3), and the other end of the fixed shaft (4) penetrates into the blade frame (5) and is connected with the locking mechanism (6) for limiting the rotation of the fixed shaft (4); the locking mechanism (6) comprises a first bevel gear (61), a second bevel gear (62) and a connecting block (63) integrally connected to the front end of the second bevel gear (62), the first bevel gear (61) is connected to the fixed shaft (4), and the connecting block (63) can be connected to the inside of the blade frame (5) in a front-back sliding mode; when the connecting block (63) slides backwards, the second bevel gear (62) and the first bevel gear (61) are meshed with each other; when the connecting block (63) slides forwards, the second bevel gear (62) and the first bevel gear (61) are separated from each other; but connecting block (63) front and back sliding connection in the inside of blade frame (5) means the outside of connecting block (63) an organic whole is equipped with a plurality of location slider (631), just the inside of blade frame (5) is equipped with a plurality of location spout (51) along its front and back end direction, location slider (631) slip match in location spout (51).

2. The fan according to claim 1, further comprising a driving mechanism (7) for driving the fixed shaft (4) to rotate, wherein the driving mechanism (7) comprises a rotating shaft (71), a third bevel gear (72) mounted on the rotating shaft (71), a protruding block (721) integrally connected to a rear end surface of the third bevel gear (72), and a slot (52) located on an inner side surface of a rear end of the blade frame (5), a through hole (53) is formed in the rear end surface of the blade frame (5) in a penetrating manner, the rotating shaft (71) and the third bevel gear (72) are both located inside the blade frame (5), and the rear end of the rotating shaft (71) penetrates through the through hole (53) and then is connected to an output shaft of the first motor (2); the first motor (2) can be connected to the mounting frame (11) in a front-back sliding mode, when the first motor (2) slides forwards, the lug (721) and the clamping groove (52) are separated from each other, and the third bevel gear (72) and the first bevel gear (61) are meshed with each other; when the first motor (2) slides backwards, the third bevel gear (72) and the first bevel gear (61) are separated from each other, and the lug (721) and the clamping groove (52) are matched with each other.

3. The fan as claimed in claim 2, wherein the front end of the rotary shaft (71) is rotatably connected to the second bevel gear (62) through a first bearing (100).

4. The blower according to claim 2, wherein the first motor (2) is slidably connected to the mounting frame (11) in a front-back direction, that is, a sliding groove (111) is formed in the mounting frame (11) along a front-back end direction of the mounting frame, and a sliding block (21) is arranged on the first motor (2) and slidably connected to the sliding groove (111).

5. The blower according to claim 4, wherein the mounting bracket (11) is provided with a driving device (8) for driving the sliding block (21) to slide, the driving device (8) comprises a second motor (81), a lead screw (82) and a worm gear (83), the lead screw (82) is mounted on the first motor (2) along a front-rear end direction, the second motor (81) is mounted on the mounting bracket (11), and the second motor (81) is connected with the lead screw (82) through the worm gear (83).

6. The blower according to claim 5, wherein the mounting frame (11) is provided with a limiting sliding groove (112) arranged along the front and rear end directions thereof, a limiting sliding block (22) is arranged between the first motor (2) and the lead screw (82), and the limiting sliding block (22) is matched in the limiting sliding groove (112) in a sliding manner.

7. A wind turbine according to claim 1, wherein a second bearing (200) is provided between the stationary shaft (4) and the blade carrier (5).

8. A wind turbine according to claim 1, wherein a third bearing (300) is provided between the blade support (5) and the front protective grille (12), and a fourth bearing (400) is provided between the blade support (5) and the mounting frame (11).