A noise-reducible assembled automobile direct-current brushless cooling fan assembly

Abstract

The application discloses an assembly type automobile direct-current brushless cooling fan assembly capable of reducing noise, and belongs to the technical field of automobile direct-current brushless cooling fan assemblies. The fan assembly frame with a supporting function is arranged, and the inner surface of the fan assembly frame is rotationally connected with a fan body. The application comprises a positioning column which is installed on the inner surface of the fan body, the outer surface end of the positioning column is provided with a positioning ring, the positioning ring is nested on the inner surface of the fan assembly frame, and the inner surface of the fan body is provided with a connecting piece. The fan body assembled by the fan assembly frame controls the stability of the fan body during use, the positioning ring and the connected output shaft are arranged to reduce noise during rotation, the positioning assembly of the motor and the shock pad one are matched to reduce the generation of noise, and the shock pad two assembled by the limiting piece and the extrusion rod is matched to improve the convenience of the positioning assembly and reduce noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile direct-current brushless cooling fan assembly, in particular to an assembled automobile direct-current brushless cooling fan assembly capable of reducing noise. BACKGROUND

[0002] The automobile direct-current brushless cooling fan assembly is an important component of the automobile cooling equipment, and is driven by a direct-current brushless motor through a fan body, thereby improving the advantages of high efficiency, energy saving and long service life of the fan, and an installation base is arranged in cooperation to fix the fan and the motor; in the use process, the fan assembly is inconvenient to effectively control, and the cooling fan assembly is prone to shaking, or the connected screws are prone to shaking and falling off.

[0003] In order to overcome the above defects, the prior art (application number CN202020613714.0, application date 2020-04-22 Chinese patent application) a kind of direct-current brushless cooling fan assembly based on FOC algorithm, it can quickly absorb heat by being provided with multiple groups of cooling fins outside support strip, it is convenient to absorb heat, improve heat dissipation performance, fan blade adopts single screw fixation, it is more convenient to install and disassemble, convenient to use;Fan blade shell inside surface is provided with spline slot, the driving shaft is provided with spline protrusion, the shell of fan blade is sleeved outside driving shaft, the spline protrusion is inserted into spline slot and engages, when installing fan blade, fan blade can be clamped outside driving shaft and positioned;Cooling fin adopts aluminum sheet material, its thickness is not greater than one millimeter, with good heat absorption performance, it is convenient to dissipate heat;Support strip is evenly distributed on the inside surface of one circle of round frame, multiple groups of cooling fins can be provided to improve heat absorption effect;There is prior art (application number CN202210240190.9, application date 2022-03-10 Chinese patent application) a kind of direct-current brushless cooling fan assembly, it can quickly install and disassemble fan by being provided with mounting seat and clamping rod, and has the function of automatic fastening, and by being provided with damping spring, not only the vibration force generated by fan work can be buffered and weakened, the generation of noise is reduced, but also it is convenient to install, and it is convenient for later maintenance;Limiting ring fixed sleeve is connected with the surface of clamping rod, the cross section shape of clamping rod is square, one end of clamping rod is in contact with the inner wall of clamping hole, one end of clamping rod is provided with inclined surface, the inclined surface provided with automatic shrinkage function when being extruded by fan body, it is convenient to install fan body, and square clamping rod can avoid rotation of inclined surface;And prior art (application number CN202220292851.8, application date 2022-02-14 Chinese patent application) a kind of low-noise direct-current brushless cooling fan assembly, it is through the cooperation between motor, rod body, first groove wheel, belt and second groove wheel, so that the device when using, the work of motor can drive first groove wheel to rotate through rod body, at this time, first groove wheel and second groove wheel are driven to rotate through belt, and second groove wheel can drive rotating shaft and first fan blade to rotate, so that motor can drive rotating shaft to rotate through first groove wheel, belt and second groove wheel, solve the problem that it is not convenient to maintain and repair after using motor and fan shaft direct connection;Although the prior art can be positioned and assembled, it is not convenient to effectively position and assemble cooling fan assembly during work, prone to loose and fall off during use, and prone to noise, affect low-noise positioning and assembly use.

[0004] In view of the above problems, it is urgent to make innovative design on the basis of the original automobile direct-current brushless cooling fan assembly. SUMMARY

[0005] The present application aims to provide an assembled automobile DC brushless cooling fan assembly with noise reduction, to solve the problem of inconvenient positioning and assembly of the cooling fan assembly during operation, which may cause loosening and falling off during use, and may generate noise, affecting the use of low-noise positioning and assembly.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an assembled automobile DC brushless cooling fan assembly with noise reduction is provided, which is provided with a fan assembly frame with a supporting effect, and the inner surface of the fan assembly frame is rotationally connected with a fan body; comprising: a positioning column installed on the inner surface of the fan body, and the outer surface end of the positioning column is installed with a positioning ring, and the positioning ring is nested in the inner surface of the fan assembly frame, and the inner surface of the fan body is installed with a connecting piece, and the inner surface of the connecting piece is nested with an output shaft, and the fan assembly frame is provided with a positioning and assembly mechanism; a limiting block is installed on the outer surface of the motor assembled with the fan assembly frame, and the outer surface of the limiting block is nested with a positioning ring, and the outer surface of the positioning ring is installed with an inclined strut, and the inclined strut is nested in the inner surface of the fan assembly frame, and the fan assembly frame is provided with a limiting clamping mechanism.

[0007] Preferably, the positioning column and the positioning ring are installed at equal angles with the inner surface of the fan body, and the fan body forms a nested rotating structure with the fan assembly frame through the positioning column and the positioning ring, and the fan assembly frame forms a nested structure with the connecting piece through the motor and the output shaft, and the connecting piece forms an integrated structure with the fan body.

[0008] Through the above structure, the stability of the fan body during use is controlled, and the fan body is prevented from falling off or shaking.

[0009] Preferably, the outer surface of the fan assembly frame is connected with a shock pad one in the positioning and assembly mechanism, and the outer surface of the motor assembled with the fan assembly frame is installed with a connecting block, and the outer surface of the connecting block is nested with a nested ring, and the side of the nested ring is connected with an extrusion piece, and the outer surface of the extrusion piece is installed with a push plate at the back side; the push plate and the fan assembly frame are elastically connected with an extrusion spring, and the outer surface of the push plate is installed with a limiting rod at the right side, and the outer surface of the limiting rod is nested with a fixing piece, and the fixing piece is fixedly installed on the outer surface of the fan assembly frame.

[0010] Through the above structure, the limiting rod and the extrusion rod are stably assembled, the stability of the motor assembled with the connecting block is controlled, loosening is avoided, and the noise reduction effect is improved by cooperating with the shock pad one.

[0011] Preferably, the connecting block forms an integrated structure with the motor, and the connecting block forms a nested structure with the nested ring, and the nested ring forms an extrusion structure with the extrusion piece, and the extrusion piece forms a sliding structure with the fan assembly frame through the push plate.

[0012] Through the above structure, the stability of the assembled connecting block can be controlled during use, and the nested ring is used for shock absorption and extrusion, and the assembly stability is improved.

[0013] Preferably, the push plate is installed and arranged in an embedded manner on the rear side of the outer surface of the limiting rod through an elastic structure formed by the extrusion spring, and the limiting rod and the fixing part form a limiting nested structure, and the fixing part is installed and arranged in an embedded manner at an equal angle with respect to the outer surface of the fan assembly frame.

[0014] Through the above structure, the stability of the push plate can be adjusted during use, and the stability of the extrusion part and the limiting rod is controlled by the extrusion spring to avoid falling off.

[0015] Preferably, the positioning ring forms a nested structure with the motor through the limiting block, and the positioning ring forms an internal structure with the fan assembly frame through the inclined support, and a screw is connected between the inclined support and the fan assembly frame, and a support part is nested and installed on the outer surface of the fan assembly frame, and the fan assembly frame forms a locking structure with the inclined support through the screw, and the fan assembly frame and the support part form an integrated structure.

[0016] Through the above structure, the position of the limiting block can be stably controlled during use, the motor is nested, and the stability of the fan assembly frame is improved by the support part to reduce vibration.

[0017] Preferably, the inner surface of the fan assembly frame in the limiting clamping mechanism is rotatably connected with a main shaft, the outer surface of the main shaft is rotatably connected with a conveyor belt, the outer surface of the main shaft is installed with a worm on the upper side, the outer surface of the worm is meshingly connected with a worm wheel on the left side, and the upper surface of the worm wheel is coaxially connected with a bevel gear set; the side surface of the bevel gear set is rotatably connected with a spur gear, the outer surface of the spur gear is meshingly connected with a rack on the front side, the outer surface of the rack is installed with a limiting part, and the limiting part is limited and slid on the inner surface of the fan assembly frame.

[0018] Through the above structure, the main shaft can be effectively assembled, the stability of the worm and the worm wheel can be controlled, and the stability of the limiting part during assembly can be adjusted.

[0019] Preferably, the main shaft and the fan assembly frame form a rotating structure, the main shaft and the conveyor belt form a nested rotating structure, the main shaft forms a meshing rotating structure with the worm and the worm wheel, and the worm wheel and the bevel gear set form a coaxial rotating structure.

[0020] Through the above structure, the rotation of the main shaft can be effectively controlled during use, and the rotation of the bevel gear is adjusted by adjusting the cooperation of the worm and the worm wheel.

[0021] Preferably, the bevel gear set and the straight-toothed gear constitute a coaxial rotation structure, the straight-toothed gear and the rack constitute a meshing sliding structure, the rack and the limiting piece constitute an integrated structure, and the limiting piece and the fan assembly constitute a limiting sliding structure.

[0022] Through the above structure, the position of the rack can be adjusted by controlling the straight-toothed gear during use, the stability of the limiting piece can be controlled to prevent misalignment, and the stability of the limiting piece can be controlled.

[0023] Preferably, the inner surface of the fan assembly frame is nested with a fixing block, the inner surface of the fixing block is telescopically connected with an extrusion rod, the extrusion rod is elastically connected with a return spring between the extrusion rod and the fan assembly frame, the outer surface of the extrusion rod is attached with a second shock pad, the fan assembly frame and the fixing block constitute a nested structure, the fixing block and the extrusion rod constitute an elastic structure through the return spring, and the extrusion rod and the second shock pad constitute an attached structure.

[0024] Through the above structure, the fixing block can be effectively assembled during use, and the stability of the fan assembly frame can be controlled by the extrusion rod.

[0025] Compared with the prior art, the fan body assembled by the fan assembly frame can control the stability of the fan body during use, the positioning ring installed by the positioning column of the fan body can reduce noise during rotation, the positioning assembly of the motor and the cooperation of the first shock pad can reduce noise, and the cooperation of the second shock pad assembled by the limiting piece and the extrusion rod can improve the convenience of the positioning assembly while reducing noise.

[0026] 1. The positioning assembly mechanism is provided with a positioning ring installed by a positioning column of a fan body, which can control the stability of the fan body on the fan assembly frame, the connecting piece and the output shaft are nested and assembled, which can improve the stability of the output shaft connection, the motor assembled by the first shock pad can reduce the noise generated by the motor during use and the noise generated by vibration, and the use of the connecting block, the extrusion piece and the limiting rod can improve the stability of the positioning assembly; further, when the extrusion piece moves downward under extrusion, the position of the limiting rod is controlled synchronously by the push plate, and the stability of the connecting block is improved by the fixing piece.

[0027] 2. The limiting block is installed on the motor housing, the positioning ring and the inclined support are cooperated to control the nested structure of the inclined support and the fan assembly frame, the position of the inclined support is controlled by the screw to prevent falling off, the shock absorbing effect of the motor is improved, and vibration is reduced.

[0028] 3. Set up a limit card engagement mechanism, can control the worm to form rotation through the rotating main shaft, and cooperate with the assembled worm gear to control the coaxial assembly of a group of bevel gears to form rotation, and with another group of bevel gears to form bevel gear set control straight tooth gear rotation, synchronous control rack center adjustment, improve the stability of the limit piece when assembling the fan assembly frame, and cooperate with the extrusion rod, control the shock absorption of the fan assembly frame assembly; further, through the nested assembly of the fixed block, cooperate with the reset spring connected with the extrusion rod, when the fan assembly frame is limited and assembled, the stability of the fan assembly frame assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0030] Figure 2 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0031] Figure 3 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0032] Figure 4 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0033] Figure 5 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application; Figure 4 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0034] Figure 6 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0035] Figure 7 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0036] Figure 8 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0037] Figure 9 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application; Figure 8 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0038] Figure 10 It is a three-dimensional structure schematic diagram of the fan assembly frame of the application;

[0039] In the figure: 1, fan assembly frame; 2, fan body; 3, positioning column; 4, positioning ring; 5, connecting piece; 6, output shaft; 7, shock pad I; 8, connecting block; 9, nested ring; 10, extrusion piece; 11, push plate; 1101, extrusion spring; 1102, limiting rod; 1103, fixing piece; 12, limiting block; 13, positioning ring; 14, inclined strut; 15, screw; 16, support piece; 17, main shaft; 18, conveyor belt; 19, worm; 20, worm gear; 21, bevel gear set; 2101, straight gear; 2102, rack; 2103, limiting piece; 22, fixed block; 23, extrusion rod; 24, return spring; 25, shock pad II. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] Please refer to Figures 1-10 The present application provides a technical solution: a noise-reducing assembled automobile DC brushless cooling fan assembly, which is provided with a fan assembly frame 1 having a supporting effect, and the inner surface of the fan assembly frame 1 is rotationally connected with a fan body 2.

[0042] Embodiment one: as Figures 1-3 shown in the technical solution, the present application provides the following technical solution: a noise-reducing assembled automobile DC brushless cooling fan assembly, which discloses: comprising: a positioning column 3 installed on the inner surface of the fan body 2, and the outer surface end of the positioning column 3 is installed with a positioning ring 4, and the positioning ring 4 is nested in the inner surface of the fan assembly frame 1, and the inner surface of the fan body 2 is installed with a connecting piece 5, and the inner surface of the connecting piece 5 is nested with an output shaft 6, and the fan assembly frame 1 is provided with a positioning assembly mechanism; the positioning column 3 and the positioning ring 4 are installed at equal angles with the inner surface of the fan body 2, and the fan body 2 forms a nested rotating structure with the fan assembly frame 1 through the positioning column 3 and the positioning ring 4, and the fan assembly frame 1 forms a nested structure with the connecting piece 5 through a motor and the output shaft 6, and the connecting piece 5 forms an integrated structure with the fan body 2.

[0043] In use, the positioning column 3 assembled at equal angles with the fan body 2 drives the positioning ring 4 installed with the positioning column 3 to be nested in the inner surface of the fan assembly frame 1, and cooperates with the connecting piece 5 installed with the fan body 2 to stably assemble the output shaft 6 for connecting the fan body 2, thereby improving the stability of the fan body 2 assembly, preventing the fan body 2 from vibrating, and improving the stability of the rotation of the fan body 2.

[0044] Embodiment Two: as Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The technical scheme shown in the embodiment, on the basis of embodiment one, further discloses the stability of motor assembly, which is used for reducing vibration and forms positioning assembly, and the specific content is as follows: the limit block 12 is installed on the outer surface of the motor assembled with the fan assembly frame 1, the outer surface of the limit block 12 is nested with the positioning ring 13, the outer surface of the positioning ring 13 is installed with the inclined strut 14, the inclined strut 14 is nested in the inner surface of the fan assembly frame 1, and the fan assembly frame 1 is provided with the limit clamping mechanism; the outer surface of the fan assembly frame 1 in the positioning assembly mechanism is connected with the shock pad one 7, the outer surface of the motor assembled with the fan assembly frame 1 is installed with the connecting block 8, the outer surface of the connecting block 8 is nested with the nested ring 9, the side surface of the nested ring 9 is extruded with the extrusion piece 10, and the outer surface of the back side of the extrusion piece 10 is installed with the push plate 11; the extrusion spring 1101 is elastically connected between the push plate 11 and the fan assembly frame 1, the outer surface of the right side of the push plate 11 is installed with the limit rod 1102, the outer surface of the limit rod 1102 is nested with the fixing piece 1103, and the fixing piece 1103 is fixedly installed on the outer surface of the fan assembly frame 1; the connecting block 8 and the motor constitute an integrated structure, the connecting block 8 and the nested ring 9 constitute a nested structure, the nested ring 9 and the extrusion piece 10 constitute an extrusion structure, and the extrusion piece 10 constitutes a sliding structure with the fan assembly frame 1 through the push plate 11; the push plate 11 constitutes an elastic structure with the fan assembly frame 1 through the extrusion spring 1101, the push plate 11 is embeddedly installed on the outer surface of the back side of the limit rod 1102, the limit rod 1102 and the fixing piece 1103 constitute a limit nested structure, and the fixing piece 1103 is embeddedly installed on the outer surface of the fan assembly frame 1 at an equal angle; the positioning ring 13 constitutes a nested structure with the motor through the limit block 12, the positioning ring 13 constitutes an embedded structure with the fan assembly frame 1 through the inclined strut 14, the inclined strut 14 is connected with the fan assembly frame 1 through the screw 15, the outer surface of the fan assembly frame 1 is nested with the support piece 16, and the fan assembly frame 1 constitutes a locking structure with the inclined strut 14 through the screw 15, and the fan assembly frame 1 and the support piece 16 constitute an integrated structure.

[0045] In use, the shock pad 7 of the control motor assembly is connected with the fan assembly frame 1, and the connecting block 8 of the control motor assembly is connected with the nested ring 9 and the extrusion piece 10, so as to extrude the extrusion piece 10 and move it backward, and the push plate 11 and the limiting rod 1102 installed on the extrusion piece 10 are extruded and contracted to the extrusion spring 1101, and through the continuous extrusion of the connecting block 8, the connecting block 8 is moved to the inner surface of the fixing piece 1103, so that the connecting block 8 is in contact with the upper end of the limiting rod 1102, and through the continuous rotation of the connecting block 8, the connecting block 8 is stably penetrated through the assembly limiting rod 1102, which improves the stability of the connecting block 8 assembled by the fixing piece 1103, prevents the connecting block 8 from falling off, cooperates with the limiting block 12 installed on the motor, effectively nests the positioning ring 13, cooperates with the inclined support 14 installed on the positioning ring 13, and is effectively connected to the inner surface of the front side of the fan assembly frame 1, so that the control screw 15 limits and assembles the inclined support 14, improves the stability of the motor assembly, and reduces the vibration of the motor.

[0046] Example three: as Figure 1 , Figure 2 and Figures 7-10The technical scheme shown, on the basis of embodiment two, further discloses the stability of the fan assembly rack assembly, and the specific content is as follows: the inner surface of the fan assembly rack 1 in the limiting clamping mechanism is rotationally connected with a main shaft 17, the outer surface of the main shaft 17 is rotationally connected with a conveying belt 18, the outer surface of the main shaft 17 is provided on the upper side with a worm 19, the outer surface of the worm 19 is meshingly connected on the left side with a worm wheel 20, and the upper surface of the worm wheel 20 is coaxially connected with a bevel gear set 21; the side surface of the bevel gear set 21 is rotationally connected with a spur gear 2101, the outer surface of the spur gear 2101 is meshingly connected on the front side with a rack 2102, the outer surface of the rack 2102 is provided with a limiting piece 2103, and the limiting piece 2103 is limited to slide on the inner surface of the fan assembly rack 1; the main shaft 17 and the fan assembly rack 1 form a rotating structure, the main shaft 17 and the conveying belt 18 form a nested rotating structure, the main shaft 17 and the worm 19 and the worm wheel 20 form a meshing rotating structure, the worm wheel 20 and the bevel gear set 21 form a coaxial rotating structure; the bevel gear set 21 and the spur gear 2101 form a coaxial rotating structure, the spur gear 2101 and the rack 2102 form a meshing sliding structure, the rack 2102 and the limiting piece 2103 form an integrated structure, and the limiting piece 2103 and the fan assembly rack 1 form a limiting sliding structure; the inner surface of the fan assembly rack 1 is nestedly connected with a fixed block 22, the inner surface of the fixed block 22 is telescopically connected with an extrusion rod 23, the extrusion rod 23 and the fan assembly rack 1 are elastically connected with a return spring 24, the outer surface of the extrusion rod 23 is attached with a second shock pad 25, the fan assembly rack 1 and the fixed block 22 form a nested structure, the fixed block 22 and the extrusion rod 23 form an elastic structure through the return spring 24, and the extrusion rod 23 and the second shock pad 25 form an attached structure.

[0047] In use, the fan assembly rack 1 is placed in the assembly position, the fixed block 22 for installing the fan assembly rack 1 is controlled to form contraction to the extrusion rod 23, the return spring 24 is controlled to contract, the second shock pad 25 is controlled to contact with the assembly position, the buffer use after the fan assembly rack 1 is installed is controlled, and after extrusion, the main shaft 17 of the fan assembly rack 1 is controlled to rotate, the conveying belt 18 is connected to another group of main shafts 17 to rotate synchronously, the equidistantly arranged worm 19 is controlled to rotate the worm wheel 20, a group of bevel gears of the bevel gear set 21 is coaxially rotated, another group of bevel gears is meshingly rotated, the coaxial straight gear 2101 is controlled to rotate through the coaxial control, the rack 2102 is meshingly controlled to slide on the inner surface of the fan assembly rack 1, the limiting piece 2103 installed on the rack 2102 is adjusted, the fan assembly rack 1 is positioned and assembled, and the cooperation of the worm 19, the worm wheel 20 and the bevel gear set 21 avoids loosening, and the stability of the fan assembly rack 1 installation is improved.

[0048] Those aspects of the description which are not otherwise fully described in detail are deemed to be part of the prior art to those skilled in the art.

[0049] While embodiments of the application have been shown and described, it is to be understood that various other modifications can be made by those skilled in the art without departing from the spirit and scope of the present application, which is defined by the appended claims and their equivalents.

Claims

1. An assemblable automobile direct-current brushless cooling fan assembly with noise reduction, a fan assembly frame (1) is arranged to have a supporting effect, and the inner surface of the fan assembly frame (1) is rotatably connected with a fan body (2); characterized in that It comprises: a positioning column (3) installed on the inner surface of the fan body (2), and a positioning ring (4) is installed on the outer surface end of the positioning column (3), and the positioning ring (4) is nested in the inner surface of the fan assembly frame (1), and a connecting piece (5) is installed on the inner surface of the fan body (2), and the inner surface of the connecting piece (5) is nested with an output shaft (6), and the fan assembly frame (1) is provided with a positioning assembly mechanism; The outer surface of the fan assembly frame (1) in the positioning assembly mechanism is connected with a shock pad one (7), and the outer surface of the motor assembled with the fan assembly frame (1) is provided with a connecting block (8), and the outer surface of the connecting block (8) is nested with a nested ring (9), and the side of the nested ring (9) is extruded with an extrusion piece (10), and the outer surface of the extrusion piece (10) is provided with a push plate (11) on the back side; The extrusion spring (1101) is elastically connected between the push plate (11) and the fan assembly frame (1), a limiting rod (1102) is installed on the outer surface of the push plate (11), and the outer surface of the limiting rod (1102) is nested with a fixing piece (1103), and the fixing piece (1103) is fixedly installed on the outer surface of the fan assembly frame (1); A limiting block (12) is installed on the outer surface of the motor assembled with the fan assembly frame (1), and a positioning ring (13) is nested on the outer surface of the limiting block (12), and a diagonal brace (14) is installed on the outer surface of the positioning ring (13), and the diagonal brace (14) is nested in the inner surface of the fan assembly frame (1), and the fan assembly frame (1) is provided with a limiting clamping mechanism; In the limiting clamping mechanism, the inner surface of the fan assembly frame (1) is rotatably connected with a main shaft (17), the outer surface of the main shaft (17) is rotatably connected with a conveyor belt (18), the outer surface of the main shaft (17) is provided with a worm (19) on the upper side, the outer surface of the worm (19) is meshed with a worm wheel (20) on the left side, and the upper surface of the worm wheel (20) is coaxially connected with a bevel gear set (21); The side shaft of the bevel gear set (21) is rotatably connected with a spur gear (2101), the outer surface of the spur gear (2101) is meshed with a rack (2102) on the front side, the outer surface of the rack (2102) is provided with a limiting piece (2103), and the limiting piece (2103) is limited to slide on the inner surface of the fan assembly frame (1).

2. The noise reducing, drop-in, automotive DC brushless cooling fan assembly of claim 1, wherein: The positioning column (3) and the positioning ring (4) are embeddedly installed at equal angles on the inner surface of the fan body (2), the fan body (2) forms a nested rotating structure with the fan assembly frame (1) through the positioning column (3) and the positioning ring (4), and the fan assembly frame (1) forms a nested structure with the connecting piece (5) through the motor and the output shaft (6), and the connecting piece (5) forms an integrated structure with the fan body (2).

3. The noise reducing, drop-in, automotive DC brushless cooling fan assembly of claim 1 wherein: The connecting block (8) is integrated with the electric machine, and the connecting block (8) and the nested ring (9) are nested, and the nested ring (9) and the extrusion piece (10) are extruded, and the extrusion piece (10) and the fan assembly frame (1) are slid.

4. The noise reducing, drop-in, automotive DC brushless cooling fan assembly of claim 1 wherein: The push plate (11) is elastically connected with the fan assembly frame (1) through the extrusion spring (1101), and the push plate (11) is embeddedly arranged on the rear side of the outer surface of the limiting rod (1102), and the limiting rod (1102) and the fixing piece (1103) are limitingly nested, and the fixing piece (1103) is embeddedly arranged at an equal angle on the outer surface of the fan assembly frame (1).

5. The noise reducing, drop-in, automotive DC brushless cooling fan assembly of claim 1 wherein: The main shaft (17) is rotatably connected with the fan assembly frame (1), and the main shaft (17) and the conveying belt (18) are nested and rotatable, and the main shaft (17) is rotatably connected with the worm (19) and the worm gear (20), and the worm gear (20) and the bevel gear set (21) are coaxially rotatable.

6. A noise reducing, drop-in, automotive DC brushless cooling fan assembly as defined in claim 1 wherein: The bevel gear set (21) is coaxially rotatable with the spur gear (2101), and the spur gear (2101) and the rack (2102) are meshingly and slidably connected, and the rack (2102) and the limiting piece (2103) are integrally connected, and the limiting piece (2103) and the fan assembly frame (1) are limitingly and slidably connected.

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