KR200338908Y1 - Cooling fan motor assembly for an automobile - Google Patents

Abstract

The present invention relates to a cooling fan motor assembly for a vehicle that can reduce noise by installing a vibration-proof rubber on the side of a bearing which is a noise source inside the motor to absorb radial and axial vibration of the motor and prevent it from being pulled to one side. The cooling fan assembly is disposed outside the bearings 40 and 50 and the bearings 40 and 50 fixed to the outer circumferential surface of the armature shaft 8 disposed on the housing portions 22a formed at both ends of the center of the housing 22. Anti-vibration rubbers 46 and 56 rotatably supporting the armature shaft 8 to the housing portion 22a, and springs 44 for pressing the anti-vibration rubbers 46 and 56 toward the storage portion 22a of the housing 22. 54).

Description

Car Cooling Fan Motor Assembly {COOLING FAN MOTOR ASSEMBLY FOR AN AUTOMOBILE}

The present invention relates to a cooling fan motor assembly for a vehicle, and more particularly, by installing vibration-proof rubber on the side of a bearing, which is a noise source inside the motor, to absorb the vibration in the radial and axial directions of the motor and to prevent noise from being pulled to one side. The present invention relates to a cooling fan motor assembly for a vehicle having a reduced structure.

Generally, air conditioners are used to provide optimum temperature and humidity for all climatic conditions and indoor environments. The air conditioners are used to maintain proper humidity, including cooling and heating, which function to maintain proper indoor temperature. Dehumidification and humidification devices, and ventilation devices for maintaining clean air.

In addition, in the case of cars, the space inside the car is narrower than the occupants, so it is necessary to ventilate according to the driving conditions. Air-conditioning and heating system should be used properly to ensure

Among them, the air conditioner serves to lower the temperature of the room by supplying coolly cooled air to the room by using the phenomenon of absorbing the heat around when the liquid evaporates. In addition, the heating device sends the cooling water discharged from the radiator to the heater core to make the surrounding air at a high temperature, and then supplies the inside of the vehicle to increase the temperature of the room.

The overall configuration of a vehicle air conditioner includes a compressor for compressing a vaporized high temperature refrigerant into a high temperature and high pressure gas state, and a high temperature and high pressure refrigerant compressed in the compressor by air drawn from the front as the cooling fan rotates. A condenser for liquefaction, an expansion valve for rapidly inflating a high pressure liquid refrigerant to form a low temperature / low pressure refrigerant, and an evaporator for evaporating low temperature refrigerant to cool surrounding air. Cooled air passing through the evaporator is supplied into the cabin by a blower.

1 shows a conventional cooling fan motor for a condenser for cooling a refrigerant passing through a condenser by rotating a cooling fan in such a cooling device. The conventional cooling fan motor for a condenser has a housing 22 having a magnet 24 attached to an inner wall thereof, an end cover 30 coupled to the housing 22 oppositely, and one end thereof penetrating the housing 22. Armature shaft 8 which is rotatably supported by bearing 28 'in the extended state and the other end is rotatably supported by bearing 28, and armature 26 fitted to the outer periphery of the armature shaft 8; ), The commutator 10 disposed on the armature 26 and the end cover 30, and the electricity applied from the battery in the state of being elastically pressed by the spring 14 through the armature 26 through the armature 26. It is comprised by the brush 12 supplied with). A mounting bracket 4 having a fastening hole 6 is attached to the outer surface of the end cover 30.

Since the magnet 24 is attached on the inner side of the housing 22 to face the armature 8, electricity applied to the commutator piece 10 through the brush 12 is supplied to the armature 26 through the wire 16. When supplied to, the rotational force is generated by the magnetic force of the magnet 24 to rotate the armature shaft (8). At this time, since the cooling fan is fixed to the screw portion formed at one end of the armature shaft 8, the cooling fan rotates at a high speed by the strong rotational force of the armature shaft 8 to cool the refrigerant flowing through the condenser. The power supply connector 20 is connected to the end cover 30.

In the conventional vehicle cooling fan motor assembly having such a configuration, since both ends of the armature shaft are rotatably supported in the housing by the bearing, the bearing vibrates and noise is generated during the high speed rotation of the motor, thereby reducing the quietness. In order to reduce noise from the motor, there is a case in which the dustproof rubber is attached to the outside of the motor, but the external dustproof rubber has a large volume and a low noise blocking effect.

The present invention for solving the above problems is to fundamentally block the radial and axial vibration generated during the amateur rotation inside the motor to prevent noise emitted to the outside to improve the quiet fan motor assembly for a vehicle The purpose is to provide.

1 is a cross-sectional view showing the internal structure of a conventional capacitor cooling fan.

Figure 2 is a cross-sectional view showing the internal structure of the condenser cooling fan according to the present invention.

Figure 3 and Figure 4 is an enlarged view showing the mounting state of the anti-vibration rubber employed in the present invention, respectively.

<Explanation of symbols for the main parts of the drawings>

8: Amateur shaft 10: Commutator 12: Brush

22: housing 40, 50: bearing 54: spring

46, 56: Anti-vibration rubber 46a, 56a: Inner end 46b, 56b: Outer end

A vehicle cooling fan motor assembly of the present invention for achieving the above object has a housing having a magnet attached to an inner wall, an end cover coupled to the housing oppositely, and an armature at an outer circumference thereof to be rotatably supported in the housing. And a commutator disposed between the armature and the end cover, and a brush for supplying electricity applied from the battery to the armature through the commutator while being elastically pressurized by the spring. A bearing fixed to an outer circumferential surface of the armature shaft disposed at accommodation portions formed at both ends of the center of the housing, and a dustproof rubber disposed outside the bearing to rotatably support the armature shaft at the storage portion; It is provided with a spring for pressing the dust-proof rubber toward the housing portion It features.

Hereinafter, with reference to the accompanying Figures 2 to 4 will be described in detail with respect to the vehicle cooling fan motor assembly according to a preferred embodiment of the present invention, the same components as the conventional structure described in Figure 1 are denoted by the same reference numerals.

In the cooling fan motor assembly, in order to absorb the radial and axial vibration of the body generated at the time of rotation of the armature shaft, and to prevent one side pull phenomenon of the motor, in the preferred embodiment of the present invention, Damping means were installed. That is, by attaching the damping means to the bearings 40 and 50 fixed to the outer circumferential surface of the armature shaft 8 disposed at the housing portions 22a formed at both ends of the center of the housing 22, the bearings 40 and 50 are mounted. The vibration of the armature shaft (8) transmitted through it was to be absorbed directly inside the motor housing.

The damping means exemplified in the present embodiment is disposed on the outside of the bearings 40 and 50, and anti-vibration rubbers 46 and 56 which rotatably support the armature shaft 8 to the housing portion 22a, and the anti-vibration rubber 46 , 56 is composed of springs 44 and 54 for urging the accommodating portion 22a.

As partially enlarged, the inner ends 46a and 56a of the anti-vibration rubbers 46 and 56 are in close contact with the springs 44 and 54 and the outer ends 46b and 56b of the anti-vibration rubbers 46 and 56. Has a structure that protrudes outwardly of the housing portion 22a.

Therefore, the inner ends 46a and 56a of the anti-vibration rubber are kept in close contact with the inner wall of the housing portion 22a of the housing 22 by the springs 44 and 54. The outer ends 46b and 56b are positioned to protrude outward from the opening of the accommodating portion 22a and the bearings 40 and 50, thereby acting as an air seal between the inside and the outside of the motor housing, thereby emitting outside noise. It can be prevented more effectively.

According to the present invention described above, by installing the anti-vibration rubber on the side of the bearing which is the noise source inside the motor to absorb the radial and axial vibration of the motor and to prevent one side to reduce noise. In addition, the noise blocking effect is enhanced by the air sealing effect through the anti-vibration rubber pressurized by the spring. In addition, since the volume is small compared to the conventional anti-vibration rubber that was installed on the outside of the motor housing, the overall weight of the motor assembly can be reduced and the cost can be reduced.

Claims (2)

A housing having a magnet attached to the inner wall, an end cover opposed to the housing, an armature shaft having an armature on the outer periphery and rotatably supported within the housing, and a commutator disposed between the armature and the end cover In the cooling fan motor for a condenser comprising a brush for supplying the electricity applied from the battery to the armature through the commutator in a state that is elastically pressurized by a spring, Bearings 40 and 50 fixed to an outer circumferential surface of the armature shaft 8 disposed in the housing portions 22a formed at both ends of the center of the housing 22; Anti-vibration rubbers 46 and 56 disposed outside the bearings 40 and 50 to rotatably support the armature shaft 8 to the housing portion 22a; And a spring (44, 54) for pressing the dust-proof rubber (46, 56) toward the housing portion (22a). The method of claim 1, The inner ends 46a and 56a of the anti-vibration rubbers 46 and 56 are in close contact with the springs 44 and 54, and the outer ends 46b and 56b protrude outwardly from the housing portion 22a. A vehicle cooling fan motor assembly.