KR20020094828A - Cooling fan motor assembly for an automobile - Google Patents

Abstract

PURPOSE: A motor assembly of cooling fan for vehicle is provided to improve quietness by cutting off vibration in radial direction and axial direction in a motor to prevent effluence of noise to the outside. CONSTITUTION: A motor assembly includes bearings(40,50) fixed on a peripheral surface of an amateur shaft(8) placed in a receiving part(22a) formed on both ends of a center of a housing(22); vibration absorbing rubbers(46,56) placed on outsides of the bearings to support the amateur shaft on the receiving part to rotate; and springs(44,54) pushing the vibration absorbing rubbers toward the receiving parts.

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 radial and axial vibration of the motor and to prevent it from being pulled to one side. It relates to a vehicle cooling fan motor assembly having a structure that can reduce.

In general, air conditioners are used to provide optimum temperature and humidity for all weather conditions and indoor environments, and for maintaining proper humidity, including air-conditioning and heating systems that function properly to maintain indoor temperature. The dehumidification and humidification apparatus used, the ventilation apparatus which keeps clean air, etc. are included.

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 expanding a high pressure liquid refrigerant to form a low temperature / low pressure refrigerant, and an evaporator for evaporating low temperature refrigerant to cool the 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.

The magnet 24 is attached on the inner side of the housing 22 to face the armature 8 so that electricity applied to the commutator piece 10 through the brush 12 is supplied to the armature 26 via 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. At this time, in order to reduce the noise from the motor, the dust-proof rubber may be attached to the outside of the motor, but the external dust-proof 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 condenser cooling fan,

2 is a cross-sectional view showing the internal structure of a 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 main part of drawing ♣

8: amateur shaft 10: commutator

12: brush 22: housing

40, 50: Bearing 44, 54: Spring

46, 56: Antivibration 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, 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, a vehicle cooling fan motor assembly according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying FIGS. 2 to 4, and the same components as those of the conventional structure described with reference to FIG. 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 when the armature shaft rotates, and to prevent one side tilting of the motor, in the preferred embodiment of the present invention Damping means were installed inside. 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 accommodating portion 22a. It has a structure that protrudes outward.

Therefore, the inner ends 46a and 56a of the anti-vibration rubber are kept in close contact with the inner wall of the housing 22a of the housing 22 by the springs 44 and 54, and the anti-vibration rubbers 46 and 56 are The outer ends 46b and 56b protrude from the opening of the housing portion 22a and the bearings 40 and 50 to protrude to the outside, thereby acting as an air seal between the inside and the outside of the motor housing to release noise outside. 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, it is possible to reduce the noise by absorbing the radial and axial vibration of the motor and preventing it from being pulled to one side. 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 in 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.