Low noise positioning assembled direct current brushless cooling fan

Abstract

The application discloses a low-noise positioning assembled direct-current brushless cooling fan, and relates to the field of energy-saving cooling devices for pumping, which comprises a preset base, a brushless fan part body is arranged on the inner side of the preset base, and a butt joint transmission shaft is arranged on the inner side of the middle end of the preset base; a locking movable part is arranged on the outer side of the preset base, and a first spring is fixedly connected to the outer side of the locking movable part. The low-noise positioning assembled direct-current brushless cooling fan is provided with a guiding locking structure, the assembly state of the preset base is adjusted through the guiding locking structure, accurate radial positioning reference is formed in the process of overall assembly butt joint, the centering of the equipment and the shell is automatically completed in the assembly process, the radial clearance between the fan blades and the air guide ring is uniform and consistent, the guiding locking quick release structure is adopted as a whole, the assembly can be completed without additional fasteners, and the fan body can be quickly taken out from the assembly rack in the maintenance process, so that tool-free quick disassembly and assembly are realized.

Description

Technical Field

[0001] This invention relates to the field of pumping energy-saving cooling device technology, specifically a low-noise positioning assembly type DC brushless cooling fan. Background Technology

[0002] DC brushless cooling fans have become a core component of high-end heat dissipation systems due to their advantages such as no mechanical brush friction, high efficiency, long life, stable speed, and low electromagnetic interference. They are widely used in automotive engines, industrial control pumping equipment, new energy electric control and other scenarios. For example, the patent with announcement number CN114483624A describes a DC brushless cooling fan assembly, which belongs to the field of fan technology. One surface of the mounting base has a mounting groove with a central hole at the bottom center. The fan body is fitted into the mounting groove. The side of the fan body has a locking hole. One end face of the fan body is fixedly connected to a ring of equally spaced limiting rods. The surface of the limiting rods is fitted with a shock-absorbing spring. One end of the shock-absorbing spring is fitted with a limiting groove. The side of the mounting groove has radially symmetrical clearance grooves. The mounting base and locking rods of this DC brushless cooling fan assembly allow for quick assembly and disassembly of the fan. For example, the patent CN1234475A describes a heat dissipation DC fan with an oil-impregnated bearing and no oil cover. The fan frame has a non-penetrating bearing seat in the center to completely solve the problem of oil leakage on the bottom of the fan frame of the self-lubricating bearing. The main feature is that several opposing wedges are set on the inner side of the bearing seat near the closed end. The diameter of the upper end of the shaft is smaller than that of the lower end. This solves the problems of high production cost, oil leakage and excessive friction of traditional brushless DC fans, and improves work efficiency. For example, the patent with publication number CN119244547A discloses a low-noise positioning and assembly automotive DC brushless cooling fan assembly, which is provided with a fan assembly frame that has a supporting function, and the inner surface of the fan assembly frame is rotatably connected to the fan body; it includes: a positioning post, which is installed on the inner surface of the fan body, and a positioning ring is installed on the outer surface end of the positioning post, and the positioning ring is nested in the inner surface of the fan assembly frame; and a connector is installed on the inner surface of the fan body to control the stability of the fan body during use. Most of the aforementioned existing technologies improve the overall structure. However, existing DC brushless cooling fans mostly use bolt fastening or snap-fit ​​connections during operation, lacking a precise positioning structure. During assembly, it is difficult to ensure the coaxiality between the fan blades and the air guide ring, and between the motor and the housing. When the coaxiality deviation is large, the fan blades will generate dynamic imbalance during high-speed rotation, which will not only aggravate bearing wear, but also generate periodic vibration noise, thus limiting their use. Summary of the Invention

[0003] The purpose of this invention is to provide a low-noise positioning assembly type DC brushless cooling fan to solve the problems mentioned in the background art, such as the lack of a precise positioning structure, the difficulty in ensuring the coaxiality between the fan blades and the air guide ring, and the motor and the housing during the assembly process, and the dynamic imbalance that occurs when the coaxiality deviation is large during high-speed rotation of the fan blades, which not only aggravates bearing wear but also generates periodic vibration noise.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a low-noise positioning assembly type DC brushless cooling fan, comprising a preset base, a brushless fan component body installed on the inner side of the preset base, and a docking drive shaft nested on the inner side of the middle end of the preset base; a locking movable component is provided through the outer side of the preset base, and a first spring is fixedly connected to the outer side of the locking movable component, and the first spring docks with the interior of the preset base; an external docking suction cup component is fixedly connected to the outer side of the locking movable component, and a guide locking structure is provided between the external docking suction cup component and the locking movable component, thereby adjusting the assembly state of the preset base through the guide locking structure.

[0005] Furthermore, the guide locking structure is provided with a built-in steel rope component, which is wound around the outside of the docking drive shaft and passes through the interior of the preset base. At the same time, the end of the built-in steel rope component is docked with the outside of the locking movable part. A preset torsion spring component is docked with the outside of the docking drive shaft, and the outside of the preset torsion spring component is docked with the interior of the preset base.

[0006] Furthermore, the outer side of the locking movable part is nested with an anti-reservation part, and the inner side of the locking movable part is bonded with a built-in reserved liquid bladder. The outer side of the built-in reserved liquid bladder and the anti-reservation part are connected to each other. A supply hose is provided through the outer side of the built-in reserved liquid bladder, and the supply hose is provided through the interior of the locking movable part.

[0007] Furthermore, the locking movable part has a built-in transverse corrugated liquid bladder inside, and the built-in transverse corrugated liquid bladder is connected to the end of the supply hose. The outer docking suction cup component has a reserved guide cavity on its inner side, and a fitting piston component is nested inside the reserved guide cavity. The end of the fitting piston component is docked with the outer side of the built-in transverse corrugated liquid bladder.

[0008] Furthermore, the docking drive shaft forms an elastic rotation structure along the interior of the preset base through a preset torsion spring component, and the docking drive shaft, together with the built-in steel rope component and the locking movable component, forms a traction structure, and the locking movable component forms an elastic movement along the interior of the preset base through a first spring.

[0009] Furthermore, during the process of the locking movable part being pressed, the outer contact reserved part simultaneously applies pressure to the contacting built-in reserved liquid bladder, and the built-in reserved liquid bladder supplies work to the interior of the built-in transverse corrugated liquid bladder through the supply hose, and the built-in transverse corrugated liquid bladder pushes the outer mating piston part to move inward.

[0010] Furthermore, a noise control docking structure is provided on the outer side of the locking movable part to control the vibration noise generated during the operation of the preset base; the noise control docking structure is provided with a transverse bearing member, and the transverse bearing member is nested and docked along the inner side of the locking movable part; an auxiliary locking member is provided through the outer side of the locking movable part, and the outer side of the auxiliary locking member corresponds to the outer side of the transverse bearing member; a second spring is fixedly connected to the outer end of the auxiliary locking member, and the outer side of the second spring docks with the locking movable part.

[0011] Furthermore, the transverse bearing members are symmetrically distributed about the center point of the locking movable member, and the outer side of the auxiliary locking member has an inclined structure. The auxiliary locking member forms an elastic sliding structure along the outer side of the locking movable member through the second spring.

[0012] Furthermore, during the process of the transverse bearing member being compressed, it slides inward along the interior of the locking moving member, and the transverse bearing member applies pressure to the outside of the auxiliary locking member of the inclined structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This low-noise positioning assembly type DC brushless cooling fan is equipped with a guide locking structure. The assembly state of the preset base is adjusted through the guide locking structure. When it is necessary to assemble the brushless fan component body with the preset assembly frame, simply rotate the docking drive shaft along the outside of the preset base. The docking drive shaft, in conjunction with the preset torsion spring component and the built-in steel rope component, drives the locking movable part to move inward. After the preset base is docked in the corresponding installation position, the force applied by the docking drive shaft can be released, allowing the locking movable part to be quickly positioned along the pre-reserved locking holes between the preset assemblies by the reset bearing force of the first spring. During the overall assembly docking process, a precise radial positioning reference is formed. The alignment of the equipment and the housing is automatically completed during the assembly process, ensuring that the radial gap between the fan blades and the air guide ring is uniform. The whole adopts a guide locking quick-release structure, which can complete the assembly without additional fasteners. During maintenance, the fan body can be quickly removed from the assembly frame, realizing tool-free quick disassembly and assembly, improving the practicality of the device. Furthermore, as the locking movable part moves laterally outward to lock, the external docking suction cup component on its outer side will pre-contact and adsorb to lock. At the same time, the anti-reservation component on the outer side of the locking movable part will be simultaneously subjected to force, applying pressure to the built-in reserved liquid bladder along the inner side of the locking movable part. This allows the built-in reserved liquid bladder to supply the inside of the built-in transverse corrugated liquid bladder through the supply hose, causing the built-in transverse corrugated liquid bladder to push the outer docking fitting piston component to move inward. This allows the fitting piston component to be drawn and semi-vacuum adsorbed along the inner side of the external docking suction cup component, ensuring the docking and locking effect of the external docking suction cup component, and further ensuring the stability of the overall preset base through the self-locking assembly of the locking movable part. Furthermore, a noise control docking structure is provided to control the vibration noise generated during the operation of the preset base. As the installed brushless fan component works, when the entire brushless fan component vibrates, the transverse bearing on the outside of the locking movable part at its docking point will be subjected to force and move accordingly, thereby forming pressure along the inner wall of the preset assembly frame. It will slide inward along the inside of the locking movable part, and the transverse bearing will apply pressure to the outside of the auxiliary locking part of the inclined structure. This allows the rubber auxiliary locking part to achieve multiple stable supports during vibration, prevent vibration noise, achieve precise positioning and assembly, ensure its coaxiality, reduce vibration noise from the source, and achieve low-noise operation over a wide speed range. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the pre-set base of the present invention; Figure 3 This is a cross-sectional three-dimensional structural diagram of the pre-set base of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the locking movable part of the present invention in half section. Figure 5 For the present invention Figure 4 A magnified schematic diagram of the central part of the structure; Figure 6 This is a three-dimensional structural diagram of the built-in steel rope component of the present invention; Figure 7 This is a three-dimensional structural diagram of the transverse support component of the present invention; Figure 8 This is a three-dimensional structural diagram of the piston fitting component of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the built-in transverse corrugated liquid bladder of the present invention.

[0015] In the diagram: 1. Pre-set base; 2. Brushless fan component body; 3. Connecting drive shaft; 4. Built-in steel rope component; 5. Locking movable component; 6. First spring; 7. Pre-set torsion spring component; 8. External connecting suction cup component; 9. Anti-collision reserved component; 10. Built-in reserved liquid bladder; 11. Supply hose; 12. Built-in transverse corrugated liquid bladder; 13. Fitting piston component; 14. Reserved guide cavity; 15. Transverse bearing component; 16. Auxiliary locking component; 17. Second spring. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1-9 This invention provides the following technical solution: a low-noise positioning assembly type DC brushless cooling fan. To address the problem of insufficient precise positioning structure, making it difficult to guarantee the coaxiality between the fan blades and the air guide ring, and between the motor and the housing during assembly, when the coaxiality deviation is large, the fan blades will generate dynamic imbalance during high-speed rotation, which not only exacerbates bearing wear but also generates periodic vibration noise. The invention discloses the following: a brushless fan component body 2 is installed on the inner side of a preset base 1, and a docking drive shaft 3 is nested on the inner side of the middle end of the preset base 1; a locking movable member 5 is provided through the outer side of the preset base 1, and a first spring 6 is fixedly connected to the outer side of the locking movable member 5, and the first spring 6 docks with the interior of the preset base 1; an external docking suction cup component 8 is fixedly connected to the outer side of the locking movable member 5, and a guide locking structure is provided between the external docking suction cup component 8 and the locking movable member 5, through which the assembly state of the preset base 1 is adjusted.

[0018] The guide locking structure is equipped with a built-in steel rope component 4, which is wound around the outside of the docking drive shaft 3 and passes through the interior of the preset base 1. The end of the built-in steel rope component 4 is connected to the outside of the locking movable member 5. A preset torsion spring component 7 is connected to the outside of the docking drive shaft 3, and the outside of the preset torsion spring component 7 is connected to the interior of the preset base 1. A stop-holding pre-fitting component 9 is nested and connected to the outside of the locking movable member 5. A built-in pre-fitting liquid bladder 10 is bonded to the inside of the locking movable member 5, and the outside of the built-in pre-fitting liquid bladder 10 is connected to the stop-holding component 9. A supply hose 11 passes through the outside of the built-in pre-fitting liquid bladder 10 and runs along the locking movable member 5. The internal through-type structure includes a built-in transverse corrugated liquid bladder 12 connected to the internal docking of the locking movable part 5. The built-in transverse corrugated liquid bladder 12 is connected to the end of the supply hose 11. A reserved guide cavity 14 is provided on the inner side of the external docking suction cup component 8. A fitting piston component 13 is nested inside the reserved guide cavity 14, and the end of the fitting piston component 13 is docked with the outer side of the built-in transverse corrugated liquid bladder 12. The docking drive shaft 3 forms an elastic rotation structure along the interior of the preset base 1 through the preset torsion spring component 7. The docking drive shaft 3, together with the built-in steel rope component 4, forms a traction structure with the locking movable part 5. The locking movable part 5 forms an elastic movement along the interior of the preset base 1 through the first spring 6. The outer side of the locking movable part 5 abuts against the pre- During the pressure application process of component 9, pressure is simultaneously applied to the contacting built-in reserved liquid bladder 10, and the built-in reserved liquid bladder 10 supplies liquid to the interior of the built-in transverse corrugated liquid bladder 12 through the supply hose 11. The built-in transverse corrugated liquid bladder 12 pushes the outer mating piston component 13 to move inward. When assembling the brushless fan component body 2 with the preset assembly frame, simply rotate the docking drive shaft 3 along the outer side of the preset base 1. The docking drive shaft 3, in conjunction with the preset torsion spring component 7 and the built-in steel rope component 4, drives the locking movable component 5 to move inward. After the preset base 1 is docked in the corresponding installation position, the force applied by the docking drive shaft 3 can be released, allowing the locking movable component 5 to move along the preset assembly frame under the return bearing force of the first spring 6. The pre-drilled locking holes between the frames allow for quick positioning, ensuring uniform radial clearance between the fan blades and the air guide ring. The entire assembly employs a guided locking quick-release structure, allowing for assembly without additional fasteners. The installed brushless fan unit 2 utilizes electronic commutation technology, employing Hall effect sensors to detect the rotor position. The controller sequentially switches the stator windings to generate a rotating magnetic field that drives the permanent magnet rotor, thereby causing the fan blades to achieve forced convection cooling. During maintenance, the fan unit can be quickly removed from the assembly frame, enabling tool-free assembly and disassembly. As the locking movable part 5 moves laterally outward, its externally mounted suction cup part 8 will pre-contact and engage, simultaneously applying force to the anti-attachment pre-reserved part 9 on the outside of the locking movable part 5.Pressure is applied to the inner side of the locking movable part 5 to the built-in reserved liquid bladder 10, thereby supplying the built-in reserved liquid bladder 10 into the interior of the built-in transverse corrugated liquid bladder 12 through the supply hose 11. This causes the built-in transverse corrugated liquid bladder 12 to push the outer mating piston part 13 inward, resulting in the mating piston part 13 undergoing semi-vacuum adsorption along the inner side of the external mating suction cup part 8. This ensures the mating locking effect of the external mating suction cup part 8 and further guarantees the self-locking assembly stability of the overall preset base 1 through the locking movable part 5.

[0019] Example 2: Based on Example 1, a noise control docking structure is also disclosed, the specific structure of which is as follows: The outer side of the locking movable part 5 is provided with a noise control docking structure, which controls the vibration noise generated during the operation of the preset base 1. The noise control docking structure is equipped with a transverse support member 15, which is nested and docked along the inner side of the locking movable member 5. An auxiliary locking member 16 is provided through the outer side of the locking movable member 5, and the outer side of the auxiliary locking member 16 corresponds to the outer side of the transverse support member 15. A second spring 17 is fixedly connected to the outer end of the auxiliary locking member 16, and the outer side of the second spring 17 docks with the locking movable member 5. The transverse support members 15 are symmetrically distributed about the center point of the locking movable member 5, and the outer side of the auxiliary locking member 16 has an inclined structure. The auxiliary locking member 16 forms an elastic sliding structure along the outer side of the locking movable member 5 through the second spring 17. As the brushless fan component body 2 operates after installation, the entire brushless fan component body 2 vibrates. When the locking movable part 5 is engaged, the transverse bearing 15 on the outside of the locking movable part 5 will be subjected to force and move accordingly, thereby forming pressure along the inner wall of the preset assembly frame. It will slide inward along the inside of the locking movable part 5, and the transverse bearing 15 will apply pressure to the outside of the auxiliary locking part 16 of the inclined structure. This allows the rubber auxiliary locking part 16 to achieve multiple stable supports during vibration, prevent vibration noise, achieve precise positioning and assembly, ensure its assembly coaxiality, and reduce vibration noise from the source. At the same time, the reserved locking groove of the preset assembly frame can be adjusted according to the needs, so that when the locking movable part 5 is locked, the transverse bearing 15 on its outside is subjected to force and moves inward, thereby resisting the contacting auxiliary locking part 16 outward for multiple locking, thereby avoiding vibration.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-noise positioning assembly type DC brushless cooling fan, comprising a preset base (1), wherein a brushless fan component body (2) is installed on the inner side of the preset base (1), and a docking drive shaft (3) is nested on the inner side of the middle end of the preset base (1). Its features are: A locking movable part (5) is provided through the outer side of the preset base (1), and a first spring (6) is fixedly connected to the outer side of the locking movable part (5). The first spring (6) is connected to the interior of the preset base (1). An external docking suction cup component (8) is fixedly connected to the outer side of the locking movable part (5), and a guide locking structure is provided between the external docking suction cup component (8) and the locking movable part (5). The assembly state of the preset base (1) is adjusted by the guide locking structure.

2. The low-noise positioning assembly type DC brushless cooling fan according to claim 1, characterized in that: The guide locking structure is provided with a built-in steel rope component (4), which is wound around the outside of the docking drive shaft (3) and passes through the interior of the preset base (1). At the same time, the end of the built-in steel rope component (4) is docked with the outside of the locking movable part (5). The outside of the docking drive shaft (3) is docked with a preset torsion spring component (7), and the outside of the preset torsion spring component (7) is docked with the interior of the preset base (1).

3. A low-noise positioning assembly type DC brushless cooling fan according to claim 2, characterized in that: The locking movable part (5) is nested and connected to the outer side of the anti-reservation part (9), and the locking movable part (5) is bonded to the inside of the built-in reserved liquid bladder (10). The outer side of the built-in reserved liquid bladder (10) and the anti-reservation part (9) are connected to each other. The outer side of the built-in reserved liquid bladder (10) is provided with a supply hose (11), and the supply hose (11) is provided along the inside of the locking movable part (5).

4. A low-noise positioning assembly type DC brushless cooling fan according to claim 3, characterized in that: The locking movable part (5) has a built-in transverse corrugated liquid bladder (12) inside, and the built-in transverse corrugated liquid bladder (12) is connected to the end of the supply hose (11). The external docking suction cup part (8) has a reserved guide cavity (14) on its inner side, and a fitting piston part (13) is nested inside the reserved guide cavity (14). The end of the fitting piston part (13) is connected to the outer side of the built-in transverse corrugated liquid bladder (12).

5. A low-noise positioning assembly type DC brushless cooling fan according to claim 4, characterized in that: The docking drive shaft (3) forms an elastic rotation structure along the interior of the preset base (1) through the preset torsion spring component (7), and the docking drive shaft (3) forms a traction structure with the built-in steel rope component (4) and the locking movable component (5), and the locking movable component (5) forms an elastic movement along the interior of the preset base (1) through the first spring (6).

6. A low-noise positioning assembly type DC brushless cooling fan according to claim 5, characterized in that: During the process of the locking movable part (5) being pressed, the contacting reserved part (9) on the outside applies pressure to the contacting built-in reserved liquid bladder (10) simultaneously, and the built-in reserved liquid bladder (10) supplies the work to the inside of the built-in transverse corrugated liquid bladder (12) through the supply hose (11), and the built-in transverse corrugated liquid bladder (12) pushes the outer mating piston part (13) to form an inward movement.

7. A low-noise positioning assembly type DC brushless cooling fan according to claim 6, characterized in that: The outer side of the locking movable part (5) is provided with a noise control docking structure, which controls the vibration noise generated during the operation of the preset base (1). The noise control docking structure is provided with a transverse support member (15), and the transverse support member (15) is nested and docked along the inner side of the locking movable member (5). An auxiliary locking member (16) is provided through the outer side of the locking movable member (5), and the outer side of the auxiliary locking member (16) corresponds to the outer side of the transverse support member (15). The outer end of the auxiliary locking member (16) is fixedly connected to a second spring (17), and the outer side of the second spring (17) docks with the locking movable member (5).

8. A low-noise positioning assembly type DC brushless cooling fan according to claim 7, characterized in that: The transverse support member (15) is symmetrically distributed about the center point of the locking movable member (5), and the outer side of the auxiliary locking member (16) has a sloping structure. The auxiliary locking member (16) forms an elastic sliding structure along the outer side of the locking movable member (5) through the second spring (17).

9. A low-noise positioning assembly type DC brushless cooling fan according to claim 8, characterized in that: During the process of the transverse bearing member (15) being compressed, it slides inward along the interior of the locking movable member (5), and the transverse bearing member (15) applies pressure to the outside of the auxiliary locking member (16) of the inclined structure.

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