High-reliability anti-locking radiator fan motor

Abstract

The utility model discloses a high-reliability anti-locking radiator fan motor, which comprises a shell, a stator, a rotor and a connecting shaft, the connecting shaft comprises a first shaft body and a second shaft body which are hollow shaft bodies, the front end of the first shaft body is open, the stator is fixed on a support, the front end of the support and the rear end of the shell are respectively provided with a bearing, and the bearing is fixed on the first shaft body. The rear end of the first shaft body penetrates out of the shell, the front end and the rear end of the first shaft body are connected with the two bearings respectively, the middle of the first shaft body is fixed to the rotor, a shaft hole corresponding to the second shaft body is formed in the front end of the shell, the second shaft body is inserted into the shell through the shaft hole and fixedly inserted into the first shaft body, and a distance is kept between the outer wall of the middle of the second shaft body and the inner wall of the first shaft body. And a heat insulation layer is also arranged between the front end of the bracket of the stator and the inner wall of the shell, so that the motor is more reliable, and is not easy to be stuck when being applied to the periphery of a radiator.

Description

Technical Field

[0001] The utility model relates to a high-reliability anti-stuck radiator fan motor. Background Art

[0002] The patent with announcement number CN210317822U discloses an anti-stuck fan, including a blade assembly, a front shell, a stator, a rotor and a rear shell, the stator is fixedly connected to the front shell, the front shell is fixedly connected to the mouth, the rotor is arranged in the middle of the stator, a plastic middle tube is arranged in the rear shell, a fan shaft is arranged on the blade assembly, and one end of the plastic middle tube arranged in the rotor is provided with a step for reducing the matching surface between the plastic middle tube and the fan shaft; if the fan motor of the above structure is used around a radiator, its structure does not take into account that the heat dissipated by the radiator will cause the motor to heat up rapidly and the plastic middle tube (connecting shaft) to deform, and is not reliable enough, and the motor is still prone to jamming. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned deficiencies of the prior art and provide a more reliable anti-stuck radiator fan motor.

[0004] The technical solution of the utility model is: a high-reliability anti-stuck radiator fan motor, comprising a shell, a stator, a rotor and a connecting shaft arranged in the shell, the connecting shaft comprising a first shaft body and a second shaft body, both of which are hollow shaft bodies, the front end of the first shaft body is open, the stator is fixed on a bracket, the front end of the bracket and the rear end of the shell are respectively provided with bearings, the rear end of the first shaft body passes through the shell, the front and rear ends of the first shaft body are respectively connected to two bearings, and the middle part of the first shaft body is fixed to the rotor;

[0005] The front end of the housing is provided with an axial hole corresponding to the second shaft body, the second shaft body is inserted into the housing through the axial hole and inserted and fixed in the first shaft body, and the outer wall of the middle part of the second shaft body is spaced apart from the inner wall of the first shaft body;

[0006] A distance is maintained between the front end of the stator support and the front end inner wall of the shell, and a heat insulation layer is also provided between the front end of the support and the inner wall of the shell.

[0007] Specifically, the housing is composed of a front cover and a rear cover, the front cover is an integrally molded structure of engineering plastics, and the rear cover is an integrally molded structure of metals.

[0008] Furthermore, the outer periphery of the rear cover is also arrayed with heat exchange fins.

[0009] Furthermore, the outer peripheral array of the second shaft body has a plurality of slots, the inner peripheral array of the front end of the first shaft body has a plurality of convex strips corresponding to the slots, each of the convex strips is inserted into the corresponding slot, and the rear end of the second shaft body abuts against the rear end inside the first shaft body and is fixed by screws.

[0010] Furthermore, a micro fan blade is fixed to the rear end of the first shaft.

[0011] Furthermore, the front end of the second shaft body has a solid connecting portion.

[0012] Furthermore, the heat insulation layer is composed of a cushion layer and a sponge layer, the cushion layer is fixed to the inner end of the front cover, and the cushion layer and the sponge layer are respectively provided with avoidance holes corresponding to the bracket and the second shaft.

[0013] Furthermore, the front end of the front cover also has a circle of fixing ring.

[0014] Furthermore, a metal support frame is fixed inside the front cover, and the bracket of the stator is clamped in the metal support frame.

[0015] The beneficial effects of the utility model are as follows: the first shaft body and the second shaft body, both of which are hollow shaft bodies, can reduce the dead weight of the motor on the one hand, and help maintain a low manufacturing cost of the motor on the other hand; the heat insulation layer arranged between the front end of the bracket and the inner wall of the shell can block the heat emitted by the radiator to prevent it from causing rapid heating of the inside of the motor; the second shaft body is inserted into the first shaft body and the outer wall of the middle part thereof keeps a distance from the inner wall of the first shaft body, which can delay the heat conduction between the two on the one hand, and even if the second shaft body is slightly deformed, the motor will not be stuck due to the covering and support of the first shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the rear end of the utility model.

[0019] In the figure: stator 1, rotor 2, first shaft body 3, second shaft body 4, bracket 5, bearing 6, thermal insulation layer 7, front cover 8, rear cover 9, heat exchange fins 10, slots 11, screws 12, micro fan blades 13, connecting part 14, cushion layer 15, sponge layer 16, fixing ring 17, metal support frame 18. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Combination Figure 1-3 As shown, a high-reliability anti-stuck radiator fan motor comprises a housing, a stator 1 arranged in the housing, a rotor 2 and a connecting shaft;

[0022] The connecting shaft includes a first shaft body 3 and a second shaft body 4, both of which are hollow shaft bodies. The front end of the first shaft body 3 is open. The stator 1 is fixed on a bracket 5. The front end of the bracket 5 and the rear end of the shell are respectively provided with bearings 6. The rear end of the first shaft body 3 passes through the shell. The front and rear ends of the first shaft body 3 are respectively connected to two bearings 6. The middle part of the first shaft body 3 is fixed to the rotor 2.

[0023] The front end of the housing is provided with an axial hole corresponding to the second shaft body 4, the second shaft body 4 is inserted into the housing through the axial hole and inserted and fixed in the first shaft body 3, and the outer wall of the middle part of the second shaft body 4 is spaced apart from the inner wall of the first shaft body 3;

[0024] A distance is maintained between the front end of the bracket 5 of the stator 1 and the front end inner wall of the shell, and a heat insulation layer 7 is also provided between the front end of the bracket 5 and the inner wall of the shell.

[0025] In the above structure, the first shaft body 3 is a metal shaft body, the second shaft body 4 is a plastic shaft body, and the outer end of the second shaft body 4 is used to fix the fan blades; the first shaft body 3 and the second shaft body 4, which are both hollow shaft bodies, can reduce the dead weight of the motor on the one hand, and on the other hand, it is beneficial to keep the manufacturing cost of the motor low; the heat insulation layer 7 arranged between the front end of the bracket 5 and the inner wall of the shell can block the heat emitted by the radiator to prevent it from causing rapid heating of the inside of the motor. The second shaft body 4 is inserted into the first shaft body 3 and the outer wall of the middle part thereof keeps a distance from the inner wall of the first shaft body 3. On the one hand, it can delay the heat conduction between the two, and on the other hand, even if the second shaft body 4 is slightly deformed, it will not cause the motor to get stuck due to the covering and support of the first shaft body 3.

[0026] In another embodiment, in combination Figure 1 and Figure 2 As shown, the housing is composed of a front cover 8 and a rear cover 9. The front cover 8 is an integrally molded structure of engineering plastics, and its thermal conductivity is poor, which can delay the conduction of heat emitted by the radiator. The rear cover 9 is a metal cover to facilitate the dissipation of internal heat when the motor is working.

[0027] In another embodiment, if Figure 3 As shown, the outer periphery of the rear cover 9 is also provided with an array of heat exchange fins 10 .

[0028] In another embodiment, in combination Figure 1 and Figure 2 As shown, the outer peripheral array of the second shaft body 4 has a plurality of slots 11, and the inner peripheral array of the front end of the first shaft body 3 has a plurality of convex strips corresponding to the slots 11, and each of the convex strips is inserted into the corresponding slot 11. The rear end of the second shaft body 4 abuts against the rear end of the first shaft body 3 and is fixed by screws 12, so that the first shaft body 3 and the second shaft body 4 can be reliably matched.

[0029] In another embodiment, in combination Figure 1 and Figure 3 As shown, a micro fan blade 13 is also fixed to the rear end of the first shaft body 3. When the first shaft body 3 rotates, the micro fan blade 13 rotates to accelerate the air flow at the rear end of the motor to improve the heat dissipation performance of the motor itself.

[0030] In another embodiment, if Figure 1 As shown, the front end of the second shaft body 4 has a solid connecting portion 14 to ensure the reliability of the connection between it and the fan blade.

[0031] In another embodiment, in combination Figure 1 and Figure 2 As shown, the heat insulation layer 7 is composed of a cushion layer 15 and a sponge layer 16. The cushion layer 15 is fixed to the inner end of the front cover 8. The cushion layer 15 and the sponge layer 16 also have avoidance holes corresponding to the bracket 5 and the second shaft body 4, respectively.

[0032] In another embodiment, in combination Figure 1-3 As shown, the front end of the front cover 8 also has a circle of fixing ring 17, and the fixing ring 17 is used to be fixed to one side of the radiator. In addition, the fixing ring 17 plays a role in blocking the heat energy emitted by the radiator.

[0033] In another embodiment, in combination Figure 1 and Figure 2 As shown, a metal support frame 18 is also fixed in the front cover 8, and the bracket 5 of the stator 1 is clamped in the metal support frame 18, and the metal support frame serves to improve the strength of the front cover.

Claims

1. A high-reliability anti-stuck radiator fan motor, comprising a housing, a stator (1) disposed in the housing, a rotor (2) and a connecting shaft, wherein: The connecting shaft comprises a first shaft body (3) and a second shaft body (4), both of which are hollow shaft bodies; the front end of the first shaft body (3) is open; the stator (1) is fixed on a bracket (5); the front end of the bracket (5) and the rear end of the housing are respectively provided with bearings (6); the rear end of the first shaft body (3) passes through the housing; the front and rear ends of the first shaft body (3) are respectively connected to two bearings (6); and the middle part of the first shaft body (3) is fixed to the rotor (2); The front end of the housing is provided with an axial hole corresponding to the second shaft body (4); the second shaft body (4) is inserted into the housing through the axial hole and inserted and fixed in the first shaft body (3); the outer wall of the middle part of the second shaft body (4) maintains a distance from the inner wall of the first shaft body (3); A distance is maintained between the front end of the bracket (5) of the stator (1) and the front end inner wall of the shell, and a heat insulation layer (7) is also provided between the front end of the bracket (5) and the inner wall of the shell.

2. A high reliability anti-stuck radiator fan motor as claimed in claim 1, characterized in that: The housing is composed of a front cover (8) and a rear cover (9); the front cover (8) is an engineering plastic one-piece molded structure, and the rear cover (9) is a metal one-piece molded structure.

3. A high reliability anti-stuck radiator fan motor as claimed in claim 2, characterized in that: The outer periphery of the rear cover (9) is also provided with an array of heat exchange fins (10).

4. A high reliability anti-stuck radiator fan motor as claimed in claim 3, characterized in that: The second shaft body (4) has a plurality of slots (11) arranged in an outer peripheral array, and the front end inner peripheral array of the first shaft body (3) has a plurality of convex strips corresponding to the respective slots (11), and each of the convex strips is inserted into the corresponding slot (11), and the rear end of the second shaft body (4) abuts against the rear end of the first shaft body (3) and is fixed by means of screws (12).

5. A high reliability anti-stuck radiator fan motor as claimed in claim 4, characterized in that: A micro fan blade (13) is also fixed to the rear end of the first shaft (3).

6. A high reliability anti-stuck radiator fan motor as claimed in claim 5, characterized in that: The front end of the second shaft body (4) has a solid connecting portion (14).

7. A high reliability anti-stuck radiator fan motor as claimed in claim 6, characterized in that: The heat insulation layer (7) is composed of a cushion layer (15) and a sponge layer (16); the cushion layer (15) is fixed to the inner end of the front cover (8); and the cushion layer (15) and the sponge layer (16) are respectively provided with avoidance holes corresponding to the bracket (5) and the second shaft body (4).

8. A high reliability anti-stuck radiator fan motor as claimed in claim 7, characterized in that: The front end of the front cover (8) also has a fixing ring (17).

9. A high reliability anti-stuck radiator fan motor as claimed in claim 8, characterized in that: A metal support frame (18) is also fixed inside the front cover (8), and the bracket (5) of the stator (1) is clamped in the metal support frame (18).

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