Low-noise cross-flow type cooling fan

Abstract

The utility model discloses a low-noise cross-flow type cooling fan, and relates to the technical field of cooling fans. The guide blades are arranged in an air inlet of the cooling fan body at equal intervals; the sliding blocks are respectively screwed on the shaft rods on the two sides of the fan blades through bearings; the square rod is fixed on an output shaft of the driving motor and is inserted into a shaft rod at one end of the fan blade; infrared sensors are fixed to the front side walls of the mounting plates, and the receiving ends of the infrared sensors are fixed to the outer side wall of the shell through supporting plates; the adjusting mechanism is connected with the infrared sensor and the sliding block; a protruding block on one side wall of the fixing base is movably arranged in one side wall of the shell, the protruding block is connected with the adjusting mechanism, and a bottom plate of the driving motor is connected with the fixing base through a limiting mechanism. The axis position of the fan blade is monitored in real time through the infrared sensor, deviation is automatically corrected through the adjusting mechanism, vibration and noise are effectively reduced, operation stability is improved, the service life of equipment is prolonged, and meanwhile manual maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cooling fan technology, specifically to a low-noise cross-flow cooling fan. Background Technology

[0002] During operation, existing cooling fans are prone to radial misalignment of the fan blade shaft due to long-term high-speed operation or mechanical vibration. This causes the fan blade rotation center to not coincide with the housing center. This eccentric operation not only increases bearing wear and shortens the service life of the equipment, but also generates abnormal vibration and noise, seriously affecting the working environment. Traditional solutions mostly use rigid fixed structures, which cannot monitor and automatically correct shaft misalignment in real time. When slight misalignment occurs, it is still necessary to stop the machine for manual adjustment, which affects the continuous operation efficiency of the equipment and increases maintenance costs. Utility Model Content

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a low-noise crossflow cooling fan that is reasonably designed and easy to use, which can effectively solve the defects of the existing technology.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: it includes a cooling fan body, support feet, and a drive motor. Support feet are fixed to the four corners of the outer bottom wall of the cooling fan. A drive motor is installed on one side of the cooling fan body, and the output shaft of the drive motor is connected to the shaft at one end of the fan blade inside the cooling fan body. It also includes:

[0005] Guide vanes, wherein there are several guide vanes, which are equally spaced in the air inlet of the cooling fan body, and the two sides of the guide vanes are screwed to the two side walls of the housing of the cooling fan body by shafts.

[0006] The sliding blocks are two in number and are respectively screwed onto the shafts on both sides of the fan blade via bearings. The sliding blocks are respectively slidably disposed in the sliding grooves on both sides of the cooling fan body housing.

[0007] A square rod is fixed on the output shaft of the drive motor and inserted into the shaft at one end of the fan blade.

[0008] Mounting plates, there are two mounting plates, and they are respectively sleeved and fixed on the shafts on both sides of the fan blade at one end of the outer side of the housing. Infrared sensors are fixed on the front side wall of each mounting plate. The receiving end of the infrared sensor is fixed on the outer side wall of the housing through the support plate. The infrared sensor is set in the same plane as the center of the housing.

[0009] An adjustment mechanism is provided inside the housing and is connected to an infrared sensor and a sliding block.

[0010] A fixed base is provided on the lower side of the drive motor. A protrusion on one side wall of the fixed base is movably disposed inside one side wall of the housing, and the protrusion is connected to the adjustment mechanism. The base plate of the drive motor is connected to the fixed base through a limiting mechanism.

[0011] Through the above technical solution, the drive motor is mounted on the fixed base through a limiting mechanism. When the cooling fan body is in use, the drive motor is started, and the drive motor drives the fan blades in the cooling fan body to rotate. During the rotation, the position of the shaft on the fan blade is detected by an infrared sensor. When the shaft of the fan blade is offset, the infrared sensor transmits the signal to the adjustment mechanism. The adjustment mechanism drives the sliding block and the fixed base to move until the axis of the fan blade shaft is in the same plane as the center of the housing, thereby avoiding the fan blade offset and reducing the noise generated during rotation.

[0012] As a further improvement of this utility model, the adjustment mechanism includes:

[0013] An internally threaded tube is fixed to the bottom wall of a sliding block on the side away from the drive motor.

[0014] The screw consists of two screws, which are symmetrically connected to the two side walls of the housing via bearings. The screw on the side adjacent to the drive motor is screwed to the protrusion on the fixed seat via threads, and the screw on the other side is screwed to the internal threaded tube via threads.

[0015] The drive rod is screwed into the bottom wall of the housing via bearings. Both ends of the drive rod are connected to the lower ends of the screws on both sides via worm gear pairs. An adjustment motor is fixed to one end of the drive rod. The adjustment motor is fixed on the outer wall of one side of the housing. An infrared sensor is connected to the adjustment motor via a controller.

[0016] Through the above technical solution, the infrared sensor starts the regulating motor through the controller, the regulating motor drives the drive rod to rotate, the drive rod drives the screws on both sides to rotate through the worm gear pair, the screws on both sides drive the internal thread tube and the fixed seat to move up and down respectively, the internal thread tube drives the sliding block connected to it to move up and down, and the fixed seat drives the drive motor and the sliding block on the other side to move up and down until the center of the fan blade and the housing are on the same plane.

[0017] As a further improvement of this utility model, the limiting mechanism includes:

[0018] The sliding bar is fixed to the bottom wall of the support plate of the drive motor and is slidably disposed in the groove on the fixed base;

[0019] The limiting plate is movably disposed on the lower side inside the fixed base. Several limiting springs are fixed at equal intervals on the lower surface of the limiting plate, and the lower ends of the limiting springs are fixed to the inner bottom wall of the fixed base.

[0020] The limiting rods are multiple in number and are fixed at equal intervals on the upper surface of the limiting plate. The limiting rods are inserted into the slots on the bottom wall of the sliding strip.

[0021] With the above technical solution, when the drive motor is installed on the fixed base, the limiting plate is pushed down so that the limiting rod is located on the lower side of the upper sliding groove of the fixed base. Then, the sliding strip on the bottom wall of the drive motor is slid into the fixed base. When the drive motor moves to the appropriate position, the elastic force of the limiting spring drives the limiting plate to move upward and insert into the slot on the bottom wall of the sliding strip, thereby limiting the drive motor.

[0022] As a further improvement of this utility model, a pushing wedge is fixed on one side wall of the limiting plate, and the pushing wedge is movably disposed inside one side wall of the fixed seat.

[0023] With the above technical solution, when the sliding bar at the bottom of the drive motor is inserted into the fixed base, it abuts against the inclined surface of the push wedge and simultaneously abuts against the push wedge, causing the push wedge to drive the limiting plate to move downward, thereby facilitating the installation of the drive motor onto the fixed base.

[0024] As a further improvement of this utility model, each of the limiting springs is provided with a telescopic rod inside, and the upper and lower ends of the telescopic rod are fixedly connected to the bottom wall of the limiting plate and the inner bottom wall of the fixing seat, respectively.

[0025] The above technical solution can increase the stability of the limit plate when it moves up and down.

[0026] As a further improvement of this utility model, a filter plate is embedded and fixed in the air inlet of the cooling fan body, and the outer wall of the filter plate is set in the same plane as the outer wall of the air inlet of the cooling fan body; the air entering the cooling fan body can be filtered.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows: The low-noise cross-flow cooling fan of this utility model monitors the position of the fan blade axis in real time through an infrared sensor and automatically corrects the offset using an adjustment mechanism, which effectively reduces vibration and noise, improves operational stability, extends equipment life, and reduces manual maintenance costs. This utility model has the advantages of reasonable design and low manufacturing cost. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2This is an exploded view of the present invention.

[0030] Figure 3 This is an exploded view of the adjusting mechanism and the fixed base in this utility model.

[0031] Figure 4 This is an exploded view of the limiting mechanism in this utility model.

[0032] Figure 5 for Figure 4 Enlarged view of section A.

[0033] Explanation of reference numerals in the attached figures:

[0034] Cooling fan body 1, support foot 2, drive motor 3, guide vane 4, sliding block 5, square rod 6, mounting plate 7, infrared sensor 8, adjustment mechanism 9, internal threaded pipe 9-1, screw 9-2, drive rod 9-3, adjustment motor 9-4, fixed seat 10, limiting mechanism 11, sliding bar 11-1, limiting plate 11-2, limiting spring 11-3, limiting rod 11-4, pushing wedge 12, telescopic rod 13, filter plate 14. Detailed Implementation

[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0036] like Figures 1-5 As shown, this embodiment includes a cooling fan body 1, support feet 2, and a drive motor 3. Support feet 2 are welded and fixed to the four corners of the outer bottom wall of the cooling fan body 1. A drive motor 3 is located on one side of the cooling fan body 1, and the output shaft of the drive motor 3 is connected to the shaft at the right end of the fan blade inside the cooling fan body 1. A filter plate 14 is embedded and fixed inside the air inlet of the cooling fan body 1, and the outer wall of the filter plate 14 is flush with the outer wall of the air inlet of the cooling fan body 1. This allows for the filtration of air entering the cooling fan body 1. It also includes:

[0037] Guide vanes 4, there are several guide vanes 4, and they are equally spaced in the air inlet of the cooling fan body 1. The two sides of the guide vanes 4 are screwed to the two side walls of the housing of the cooling fan body 1 by shafts.

[0038] Sliding blocks 5, there are two sliding blocks 5, and they are respectively screwed onto the shafts on both sides of the fan blade by bearings. The sliding blocks 5 are respectively slidably arranged in the sliding grooves on both sides of the housing of the cooling fan body 1.

[0039] The square rod 6 is fixed on the output shaft of the drive motor 3 and inserted into the shaft at the right end of the fan blade.

[0040] Mounting plate 7, there are two mounting plates 7, and they are respectively sleeved and fixed on the shafts on both sides of the fan blade located on the outer side of the housing. Infrared sensors 8 are fixed to the front side wall of each mounting plate 7 by bolts. The receiving end of the infrared sensor 8 is fixed to the outer side wall of the housing by a support plate. The infrared sensor 8 is set in the same plane as the center of the housing.

[0041] Adjustment mechanism 9, which is disposed inside the housing, is connected to infrared sensor 8 and sliding block 5;

[0042] The fixed seat 10 is located on the lower side of the drive motor 3. The protrusion on the left side wall of the fixed seat 10 is movably disposed inside the right side wall of the housing, and the protrusion is connected to the adjustment mechanism 9. The base plate of the drive motor 3 is connected to the fixed seat 10 through the limiting mechanism 11. Example

[0043] See Figure 1-3 As shown, based on Embodiment 1, the adjustment mechanism 9 includes:

[0044] The internally threaded tube 9-1 is welded and fixed to the bottom wall of the sliding block 5 on the side away from the drive motor 3.

[0045] Screw 9-2, there are two screws 9-2, and they are symmetrically connected to the two side walls of the housing through bearings. The right screw 9-2 is screwed to the protrusion on the fixed seat 10 through threads, and the left screw 9-2 is screwed to the internal thread tube 9-1 through threads.

[0046] The drive rod 9-3 is screwed into the bottom wall of the housing via bearings. Both ends of the drive rod 9-3 are connected to the lower ends of the screws 9-2 on both sides via worm gear pairs. An adjustment motor 9-4 is fixed to one end of the drive rod 9-3. The adjustment motor 9-4 is fixed to the outer wall on the left side of the housing by bolts. The infrared sensor 8 is connected to the adjustment motor 9-4 via a controller. Example

[0047] See Figure 4 , Figure 5 As shown, based on Embodiment 1, the limiting mechanism 11 includes:

[0048] The sliding bar 11-1 is welded and fixed to the bottom wall of the support plate of the drive motor 3, and the sliding bar 11-1 is slidably arranged in the groove on the fixed seat 10.

[0049] The limiting plate 11-2 is movably disposed on the lower side inside the fixed base 10. Several limiting springs 11-3 are welded and fixed at equal intervals on the lower surface of the limiting plate 11-2. The lower ends of the limiting springs 11-3 are welded and fixed to the inner bottom wall of the fixed base 10. Each limiting spring 11-3 is provided with a telescopic rod 13 inside. The upper and lower ends of the telescopic rod 13 are welded and fixed to the bottom wall of the limiting plate 11-2 and the inner bottom wall of the fixed base 10, respectively, which can increase the stability of the limiting plate 11-2 when it moves up and down.

[0050] A push wedge 12 is welded and fixed on the right side wall of the limiting plate 11-2. The push wedge 12 is movably disposed in the right side wall of the fixed base 10. When the sliding bar 11-1 at the bottom of the drive motor 3 is inserted into the fixed base 10, it abuts against the inclined surface of the push wedge 12 and simultaneously abuts against the push wedge 12, so that the push wedge 12 drives the limiting plate 11-2 to move downward, thereby facilitating the installation of the drive motor 3 onto the fixed base 10.

[0051] The limiting rods 11-4 are multiple in number and are fixed at equal intervals on the upper surface of the limiting plate 11-2. The limiting rods 11-4 are inserted into the slots on the bottom wall of the sliding strip 11-1.

[0052] When using this utility model, when installing the drive motor 3 onto the fixed base 10, push the limiting plate 11-2 downwards so that the limiting rod 11-4 is located below the upper sliding groove of the fixed base 10. Then slide the sliding strip 11-1 on the bottom wall of the drive motor 3 into the fixed base 10. When the drive motor 3 moves to the appropriate position, the elastic force of the limiting spring 11-3 drives the limiting plate 11-2 to move upwards and insert into the slot on the bottom wall of the sliding strip 11-1, thereby limiting the drive motor 3. When the cooling fan body 1 is in use, start the drive motor 3. The drive motor 3 drives the fan blades in the cooling fan body 1 to rotate. During the rotation, infrared transmission is used to transmit the signal. The infrared sensor 8 detects the position of the shaft on the fan blade. When the shaft of the fan blade shifts, the infrared sensor 8 starts the regulating motor 9-4 through the controller. The regulating motor 9-4 drives the drive rod 9-3 to rotate. The drive rod 9-3 drives the screws 9-2 on both sides to rotate through the worm gear pair. The screws 9-2 on both sides drive the internal thread tube 9-1 and the fixed seat 10 to move up and down respectively. The internal thread tube 9-1 drives the sliding block 5 connected to it to move up and down. The fixed seat 10 drives the drive motor 3 and the sliding block 5 on the other side to move up and down until the center of the fan blade and the housing are on the same plane, thereby avoiding the fan blade from shifting and reducing the noise generated during rotation.

[0053] Compared with the prior art, the beneficial effects of this specific embodiment are as follows:

[0054] 1. The infrared sensor 8 monitors the position of the fan blade shaft in real time, and the adjustment mechanism 9 automatically corrects the offset, effectively reducing operating noise and improving stability;

[0055] 2. The drive motor 3 is connected to the fixed base 10 by a limit mechanism 11. The sliding bar 11-1 and the limit rod 11-4 are connected by a plug-in design to achieve quick disassembly and assembly and convenient maintenance.

[0056] 3. The worm gear pair drives the twin screw 9-2 in linkage, synchronously adjusting the positions of the sliding blocks 5 on both sides and the motor to ensure the dynamic balance of the fan blades and extend their service life;

[0057] 4. Guide vanes 4 optimize airflow, filter plates 14 prevent dust, and combined with an intelligent adjustment system, it balances efficient cooling and equipment protection, making it more widely applicable.

[0058] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-noise cross-flow cooling fan, comprising a cooling fan body (1), supporting feet (2) and a driving motor (3), the four corners of the outer bottom wall of the cooling fan are fixed with the supporting feet (2), one side of the cooling fan body (1) is provided with the driving motor (3), and the output shaft of the driving motor (3) is connected with the shaft rod of one end of the fan blade in the cooling fan body (1); characterized in that: It also contains: The guide vane (4) is several, and its equidistance is arranged in the air inlet of the cooling fan body (1), and the two sides of the guide vane (4) are rotatably connected to the two side walls of the shell of the cooling fan body (1) through shaft rods; The sliding block (5) is two, and it is rotatably connected to the shaft rods on both sides of the fan through bearings, and the sliding block (5) is slidably arranged in the sliding groove on the two side walls of the shell of the cooling fan body (1); The square rod (6) is fixed on the output shaft of the driving motor (3), and the square rod (6) is inserted into the shaft rod at one end of the fan; The mounting plate (7) is two, and it is respectively sleeved and fixed on the shaft rod on the outside of the shell at one end of the fan, and the front wall of the mounting plate (7) is fixed with the infrared sensor (8), and the receiving end of the infrared sensor (8) is fixed on the outer side wall of the shell through the support plate, and the infrared sensor (8) is arranged in the same plane with the center of the shell; The adjusting mechanism (9) is arranged in the shell, and the adjusting mechanism (9) is connected with the infrared sensor (8) and the sliding block (5); The fixed seat (10) is arranged on the lower side of the driving motor (3), the protrusion on one side wall of the fixed seat (10) is movably arranged in the side wall of the shell, and the protrusion is connected with the adjusting mechanism (9), and the bottom plate of the driving motor (3) is connected with the fixed seat (10) through the limiting mechanism (11).

2. A low noise crossflow cooling fan as claimed in claim 1, characterized in that: The adjusting mechanism (9) contains: The inner threaded pipe (9-1) is fixed on the bottom wall of the sliding block (5) away from the driving motor (3); The screw rod (9-2) is two, and it is symmetrically rotatably connected to the two side walls of the shell through bearings, and the screw rod (9-2) adjacent to one side of the driving motor (3) is rotatably connected to the protrusion on the fixed seat (10) through threads, and the screw rod (9-2) on the other side is rotatably connected in the inner threaded pipe (9-1); The driving rod (9-3) is rotatably connected to the bottom wall of the shell through bearings, and the two ends of the driving rod (9-3) are respectively connected to the lower ends of the two screw rods (9-2) through worm and worm gear pairs, and the end of the driving rod (9-3) is fixed with the adjusting motor (9-4), and the adjusting motor (9-4) is fixed on the outer wall of one side of the shell, and the infrared sensor (8) is connected with the adjusting motor (9-4) through the controller.

3. A low noise crossflow cooling fan as claimed in claim 1, wherein: The limiting mechanism (11) contains: The sliding bar (11-1) is fixed on the bottom wall of the support plate of the driving motor (3), and the sliding bar (11-1) is slidably arranged in the sliding groove on the fixed seat (10); The limiting plate (11-2) is movably arranged on the lower side of the inside of the fixed seat (10), and a plurality of limiting springs (11-3) are equidistantly fixed on the lower surface of the limiting plate (11-2), and the lower end of the limiting spring (11-3) is fixed on the inner bottom wall of the fixed seat (10); The limiting rods (11-4) are equidistantly fixed on the upper surface of the limiting plate (11-2), and are inserted into the slots on the bottom wall of the sliding bar (11-1).

4. A low noise crossflow cooling fan as claimed in claim 3, wherein: One side wall of the limiting plate (11-2) is fixed with a pushing wedge (12) which is movably arranged in one side wall of the fixed seat (10).

5. A low noise crossflow cooling fan as claimed in claim 3, wherein: The limiting spring (11-3) is internally provided with a telescopic rod (13) which is fixedly connected with the bottom wall of the limiting plate (11-2) and the inner bottom wall of the fixed seat (10) respectively.

6. A low noise crossflow cooling fan as claimed in claim 1, wherein: The air inlet of the cooling fan body (1) is embeddedly and fixedly provided with a filter plate (14), and the outer wall of the filter plate (14) is arranged in the same plane with the outer wall of the air inlet of the cooling fan body (1).

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