High-sealing-performance waterproof motor automobile radiator fan

Abstract

The utility model relates to an automobile radiator fan, in particular to a high-sealing-performance waterproof motor automobile radiator fan, which is used for solving the problems of wading short circuit caused by insufficient sealing performance of a motor and difficulty in heat dissipation of the motor in a sealing state of the traditional radiator fan. According to the technical scheme, the motor comprises an outer frame, a motor body and fan blades, the motor body achieves external water prevention through a double-sealing structure (including a stepped L-shaped sealing face and a second sealing ring) of an upper cover and a base, and meanwhile water is prevented from entering a bearing gap through multiple seals (a first sealing ring, a sealing gasket and a protruding ring are matched with a blocking groove) of an upper bearing; arc-shaped grooves and air inlet holes are formed in the middles of the fan blades, and air flow is guided to blow into the motor to dissipate heat during rotation. According to the utility model, self heat dissipation of the motor is realized while high sealing performance is ensured, and the operation stability of a heat dissipation system is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile cooling systems, and in particular relates to a highly sealed waterproof motor radiator fan for cooling automobile engines. Background Art

[0002] The automotive radiator fan is mainly used to dissipate heat from the engine cooling system. It accelerates heat dissipation from the radiator by driving air flow, ensuring stable engine temperature. Traditional radiator fan motors have the following defects:

[0003] Insufficient sealing: The sealing structure design of the motor cover, base, bearings and other parts is simple. When wading through water, it is easy to cause short circuit or damage due to water ingress, affecting the operation of the cooling system;

[0004] Heat dissipation contradiction: The motor will generate high temperature when running for a long time, but in order to prevent water from entering, the sealing needs to be improved, which makes it difficult for the heat inside the motor to dissipate, further exacerbating the high temperature risk.

[0005] Therefore, there is an urgent need for an automobile radiator fan that can simultaneously solve the waterproof and heat dissipation problems in a sealed state. Utility Model Content

[0006] In order to solve the above problems, the purpose of this utility model is to provide a highly sealed waterproof motor car radiator fan, aiming to solve the following technical problems:

[0007] 1. Traditional motors are not well sealed and are prone to water ingress when wading, causing short circuits or damage;

[0008] 2. The high temperature generated by the motor running in a sealed state cannot be effectively dissipated, affecting the service life and stability of the cooling system

[0009] To achieve the above objectives, the present invention provides the following technical solutions: a highly sealed waterproof motor car radiator fan, comprising an outer frame, a motor, and fan blades, wherein the motor is mounted within the outer frame, and the fan blades are fixedly connected to the motor's rotating shaft; the motor comprises an upper cover, a base, and a rotor, wherein the upper cover is sealed to the base; the upper end of the rotor's rotating shaft passes through the upper cover, and an upper bearing is provided between the rotating shaft and the upper cover, and a lower bearing is provided between the rotating shaft and the base;

[0010] The sealing structure of the upper cover: the upper cover is provided with a mounting groove adapted to the outer wall of the upper bearing, a first sealing ring is provided between the inner wall of the mounting groove and the outer wall of the upper bearing, and the first sealing ring is an O-ring or a lip sealing ring; the open end of the mounting groove extends inward to form an annular retaining ring, and the lower end surface of the retaining ring is provided with an annular blocking groove; a gap exists between the inner ring and the outer ring of the upper bearing, an annular sealing gasket is provided in contact with the end surface of the upper bearing, the upper end surface of the sealing gasket protrudes upward to form a raised ring, the raised ring extends into the blocking groove and is in contact with the inner side wall of the blocking groove facing outward;

[0011] The sealing structure of the base: the lower end face of the base is a non-porous end face, and the outer peripheral wall of the upper end face is provided with an annular step along the circumference, and the step is "L"-shaped; the lower open end face of the upper cover is tightly inserted into the step and snap-fitted, and a second sealing ring is provided between the inner right angle position of the step and the lower open end face of the upper cover. The specific structure is as follows: an annular snap groove is provided on the vertical surface of the step, and a clamping block that cooperates with the snap groove is convexly provided on the inner wall of the upper cover port. The clamping block is snapped into the snap groove, and a chamfer is provided between the clamping block and the end face wall of the upper cover. An annular groove is formed between the chamfer and the right angle of the step, and the second sealing ring is provided in the annular groove. The upper cover is fixedly connected to the base by bolts, thereby achieving a sealed connection between the upper cover and the base;

[0012] The heat dissipation structure of the fan blade is as follows: an arc-shaped groove evenly distributed around the circumference is provided on the middle end face of the fan blade, one side wall of the arc-shaped groove is a vertical surface, and an air inlet is provided at the bottom of the arc-shaped groove close to the vertical surface; when the fan blade rotates, the airflow generated by it is blown into the interior of the motor through the air inlet to dissipate heat from the motor.

[0013] Furthermore, the connecting surface between the upper cover and the base is a plane, the first sealing ring is an O-ring or a lip sealing ring; the sealing gasket is an elastic metal gasket or a rubber gasket, and the height of the raised ring is equal to the depth of the sealing groove to ensure a gap-free fit.

[0014] Furthermore, the step height of the base is consistent with the thickness of the lower opening end surface of the upper cover, and the second sealing ring is an annular rubber ring, the cross-sectional diameter of which is larger than the groove depth of the step to form an extrusion seal.

[0015] Furthermore, the number of the arc-shaped slots is 4-8, the air inlet holes are square or elliptical, the aperture is 1-3 mm, and are evenly distributed along the bottom of the arc-shaped slots.

[0016] The beneficial effects of the utility model are:

[0017] 1. High sealing and waterproof: The "L"-shaped step + second sealing ring structure between the upper cover and the base blocks water ingress from the sides and bottom of the base. The upper bearing is protected by a triple layer of protection: the first sealing ring (seals the gap between the mounting groove and the bearing outer wall), the sealing gasket (seals the gap between the inner and outer rings of the bearing), and the raised ring and the sealing groove (prevents water from entering the gap between the bearing end face). This effectively prevents liquid and dust from entering the motor, preventing short circuits or damage.

[0018] 2. Self-heating in a sealed state: The arc-shaped slot and air inlet design in the middle of the fan blade use the centrifugal force generated by the rotation of the fan blade to guide the airflow through the air inlet to the inside of the motor, directly dissipating heat to the motor's heating components (such as the stator and rotor), reducing the motor's operating temperature and ensuring stable operation of the cooling system;

[0019] 3. Compact and reliable structure: All sealing components (first sealing ring, second sealing ring, sealing gasket) are embedded and installed without any additional movement interference with the motor body, taking into account both sealing and rotation flexibility.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a specific embodiment of the present utility model Figure 1 ;

[0022] Figure 2 A three-dimensional diagram of a specific embodiment of the present invention Figure 2 ;

[0023] Figure 3 A cross-sectional view of a specific embodiment of the present utility model;

[0024] Figure 4 for Figure 3 A magnified view of middle A;

[0025] Figure 5 for Figure 3 Enlarged view of middle B;

[0026] Figure 6 for Figure 1 Enlarged view of C in the middle.

[0027] Description of reference numerals:

[0028] 1-outer frame; 2-motor; 3-fan blade; 4-clip slot; 5-block; 6-chamfer; 21-upper cover; 22-base; 23-rotor; 24-rotating shaft; 25-upper bearing; 26-first sealing ring; 27-blocking ring; 28-sealing groove; 29-sealing gasket; 291-raised ring; 30-second sealing ring; 31-step; 32-arc-shaped groove; 33-air inlet. DETAILED DESCRIPTION

[0029] The present invention is described in detail below through examples, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] like Figure 1 — Figure 3As shown, this embodiment discloses a highly sealed, waterproof motor-mounted automotive radiator fan, comprising an outer frame 1, a motor 2, and blades 3. The motor 2 is mounted within the outer frame 1, and the blades 3 are fixedly connected to the motor 2's rotating shaft 24 via a flat key or interference fit. The motor 2 comprises an upper cover 21, a base 22, and a rotor 23, with the upper cover 21 and base 22 sealed together. The upper end of the rotor 23's rotating shaft 24 passes through the upper cover 23, with an upper bearing 25 disposed between the rotating shaft 24 and the upper cover 21, and a lower bearing disposed between the rotating shaft 24 and the base 22.

[0031] The sealing structure of the upper cover 21 is as follows: Figure 3 、 Figure 4 As shown, an annular mounting groove (not labeled) is defined within the upper cover 21, which mates with the outer wall of the upper bearing 25. A first sealing ring 26 (e.g., an O-ring or lip seal) is embedded between the inner wall of the mounting groove and the outer wall of the upper bearing 25. The first sealing ring 26 is an O-ring or lip seal, which prevents liquid from seeping in through the gap between the mounting groove and the outer wall of the bearing. The open end of the mounting groove extends inward to form an annular retaining ring 27, the lower end of which defines an annular sealing groove 28. A slight gap exists between the inner and outer rings of the upper bearing 25, and an annular sealing gasket 29 (e.g., a rubber gasket) is fitted onto its end face. The upper end of the sealing gasket 29 protrudes upward to form a raised ring 291. The raised ring 291 extends into the sealing groove 28 and mates tightly with the outward-facing inner wall of the sealing groove 28, blocking the path for water to enter the gap between the inner and outer rings of the bearing.

[0032] The sealing structure of the base 22 is as follows: Figure 2 、 Figure 3 、 Figure 5 As shown, the lower end surface of the base 22 is a non-porous end surface (sealing surface) to prevent direct water ingress from the bottom. An annular step 31 is provided along the circumferential outer wall of the upper end surface of the base 22. Step 31 is L-shaped (the horizontal and vertical sections are integrally formed). The lower open end surface of the upper cover 21 is tightly inserted into the horizontal section of this step 31, while the vertical section of step 31 abuts against and snaps into the inner wall of the lower open end surface of the upper cover 21. The specific structure is as follows: an annular snap groove 4 is provided on the vertical surface of step 31, and a block 5 that engages with snap groove 4 is protruded from the inner wall of the port of the upper cover 21. The block 5 snaps into the snap groove 4, and a chamfer 6 is provided between the block 5 and the end wall of the upper cover 21. The chamfer 6 forms an annular groove with the right angle of the step 31, and the second sealing ring 30 is disposed within this annular groove. Through the snap connection and the extrusion deformation of the second sealing ring 30, the side sealing of the base 22 and the upper cover 21 is achieved, further blocking water from entering from the side, thereby achieving a sealed connection between the upper cover 21 and the base 22.

[0033] The heat dissipation structure of the fan blade 3 is as follows: Figure 1 、 Figure 6As shown, four arc-shaped grooves 32 (or 6-8) are evenly distributed on the middle end face of the fan blade 3, and one side wall of the arc-shaped groove 32 is a vertical surface (perpendicular to the direction of rotation of the fan blade). A circular air inlet hole 33 is provided at the bottom of the arc-shaped groove 32 close to the vertical surface. The air inlet hole 33 is a square hole or an elliptical hole. When the motor 2 drives the fan blade 3 to rotate, a high-speed airflow is generated at the outer edge of the fan blade 3. Part of the airflow flows into the gap between the fan blade 3 and the motor 2 through the air inlet hole 33 of the arc-shaped groove 32, and finally blows to the stator, rotor and other heat-generating components inside the motor 2, thereby realizing self-heating of the motor.

[0034] The following technical effects are achieved by adopting the above technical solution:

[0035] 1. High sealing and waterproof: The "L"-shaped step + second sealing ring structure between the upper cover and the base blocks water ingress from the sides and bottom of the base. The upper bearing is protected by a triple layer of protection: the first sealing ring (seals the gap between the mounting groove and the bearing outer wall), the sealing gasket (seals the gap between the inner and outer rings of the bearing), and the raised ring and the sealing groove (prevents water from entering the gap between the bearing end face). This effectively prevents liquid and dust from entering the motor, preventing short circuits or damage.

[0036] 2. Self-heating in a sealed state: The arc-shaped slot and air inlet design in the middle of the fan blade use the centrifugal force generated by the rotation of the fan blade to guide the airflow through the air inlet to the inside of the motor, directly dissipating heat to the motor's heating components (such as the stator and rotor), reducing the motor's operating temperature and ensuring stable operation of the cooling system;

[0037] 3. Compact and reliable structure: All sealing components (first sealing ring, second sealing ring, sealing gasket) are embedded and installed without any additional movement interference with the motor body, taking into account both sealing and rotation flexibility.

Claims

1. A highly sealed waterproof motor car radiator fan, comprising an outer frame (1), a motor (2) and a fan blade (3), wherein the motor (2) is mounted in the outer frame (1), and the fan blade (3) is fixedly connected to a rotating shaft (24) of the motor (2); characterized in that: The motor (2) comprises an upper cover (21), a base (22) and a rotor (23), wherein the upper cover (21) is sealedly connected to the base (22); the upper end of the rotating shaft (24) of the rotor (23) passes through the upper cover (21), and an upper bearing (25) is provided between the rotating shaft (24) and the upper cover (21); the upper cover (21) is provided with a mounting groove adapted to the outer wall of the upper bearing (25), and a first sealing ring (26) is provided between the inner wall of the mounting groove and the outer wall of the upper bearing (25); the opening end of the mounting groove extends inwardly to form an annular retaining ring (27), and the lower end of the retaining ring (27) is provided with a plurality of retaining rings (27) extending inwardly. An annular sealing groove (28) is provided on the surface; a gap is formed between the inner ring and the outer ring of the upper bearing (25), and an annular sealing gasket (29) is provided on the end surface thereof, and the upper end surface of the sealing gasket (29) is raised upward to form a raised ring (291), and the raised ring (291) extends into the sealing groove (28) and is in contact with the inner side wall of the sealing groove (28) facing outward; an arc groove (32) is provided on the middle end surface of the fan blade (3), and one side wall of the arc groove (32) is a vertical surface, and an air inlet hole (33) is provided at the bottom of the arc groove (32) close to the vertical surface.

2. The highly sealed waterproof motor automobile radiator fan according to claim 1, characterized in that: The lower end face of the base (22) is a non-porous end face, and an annular step (31) is provided on the outer peripheral wall of the upper end face along the circumferential direction, and the step (31) is "L"-shaped; the lower opening end face of the upper cover (21) is tightly inserted into the step (31), and the inner right angle position of the step (31) is snap-connected to the lower opening end face of the upper cover (21) and a second sealing ring (30) is provided; the upper cover (21) and the base (22) are fixedly connected by bolts.

3. The highly sealed waterproof motor automobile radiator fan according to claim 2, characterized in that: An annular snap groove (4) is provided on the vertical surface of the step (31), and a clamping block (5) cooperating with the snap groove (4) is convexly provided on the inner wall of the port of the upper cover (21). The clamping block (5) is clamped into the snap groove (4), and a chamfer (6) is provided between the clamping block (5) and the end wall of the upper cover (21). An annular groove is formed between the chamfer (6) and the right angle of the step (31), and the second sealing ring (30) is provided in the annular groove.

4. The highly sealed waterproof motor automobile radiator fan according to claim 1, characterized in that: The first sealing ring (26) is an O-ring or a lip sealing ring.

5. The highly sealed waterproof motor automobile radiator fan according to claim 1, characterized in that: The number of the arc-shaped grooves (32) is 4-8, and the air inlet holes (33) are square.

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