KR200240813Y1 - Air gap controlling structure of cooling fan motor for a condenser - Google Patents

Abstract

The present invention relates to an air gap adjusting structure of a cooling fan motor for a condenser that can improve the assembly by easily adjusting the air gap of the armature shaft by using a retainer disposed between the end cover and the commutator. The air gap adjusting structure of the motor has a housing 50 having a magnet 52 attached to the inner wall, an end cover 54 coupled to the housing 50 oppositely, and an armature 62 at the outer circumference thereof. The ball bearing 70 is rotatably supported in the first accommodating portion 50a of the housing 50 and the other end is sintered in the second accommodating portion 54a of the end cover 54 by the sintered bearing 72. The armature shaft 60 is rotatably supported in the present invention, the commutator 64 disposed between the armature 62 and the end cover 54, and is applied from the battery in the state of being elastically pressed by the spring 68. Electricity probably through the commutator 64 And a brush 66 for supplying to the chur 62, and a gap adjusting washer 74 is mounted on the armature shaft 60 near the ball bearing 70, and the end cover 54 and the commutator 64. The retainer 76 is mounted on the armature shaft 60.

Description

AIR GAP CONTROLLING STRUCTURE OF COOLING FAN MOTOR FOR A CONDENSER}

The present invention relates to a cooling fan motor for a condenser, and more particularly, a condenser cooling that can improve the assemblability by easily adjusting the air gap of the armature shaft by using a retainer disposed between the end cover and the commutator. The air gap control structure of the fan motor.

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 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 (10) having a through hole (10a) through which a shaft penetrates and a first housing (10b) in which a first bearing (30) is accommodated, and a housing (through a flange (14a)). 10 and an end cover 14 having a second housing portion 14b for receiving the second bearing 32 and having one end extended through the through hole 10a of the housing 10. The armature shaft 20 is rotatably supported by the first bearing 30 and the other end is rotatably supported by the second bearing 32, and the armature 22 fitted to the outer circumference of the armature shaft 20. ), The commutator 24 disposed on the armature 22 and the end cover 14, and the electricity applied from the battery in the state of being elastically pressed by the spring 28 through the armature 22 through the armature 22. It consists of the brush 26 which supplies to (). Mounting brackets 16 having fastening holes 16a are attached to the outer surface of the end cover 14.

The magnet 12 is attached on the inner side surface of the housing 10 to face the armature 22. When electricity applied to the commutator piece 25 through the brush 26 is supplied to the armature 22 through the wire 38, the rotation force is generated by the magnetic force of the magnet 12 to rotate the armature shaft 20. do. At this time, since the cooling fan is fixed to the fan mounting portion 20a formed at one end of the armature shaft 20, the cooling fan rotates at a high speed by the strong rotational force of the armature shaft 20 to cool the refrigerant flowing through the condenser.

At the time of assembly, the armature shaft is mounted with the commutator 24 and the armature 22 after press-fitting the second bearing 32 into the second storage portion 14b while the end cover 14 is fixed to the jig. One end of the 20 is inserted into the second bearing 32, while the other end is fitted with the second bearing 32, and then the housing 10 is combined by using a separate jig to complete the assembly. At this time, since the armature shaft 20 is rotatably mounted by using the first bearing 30 and the second bearing 32, an air gap occurs, and in the assembly line, an air gap is generated. Appropriately sized washers 34, 36 are fitted to restrain longitudinal flow of armature shaft 20.

In a conventional cooling fan motor for a condenser having such a configuration, an air gap is generated because the armature shaft is assembled in a state in which the longitudinal movement of the first bearing is not regulated. At this time, an appropriate thickness washer is selected to compensate for the air gap. Since it is necessary to assemble separately, it takes a lot of assembly time and the workability is lowered, which leads to an increase in cost.

The present invention to solve the above problems is to use a retainer disposed between the end cover and the commutator cooling fan for condenser that can reduce the cost to improve the assembly performance by easily adjusting the air gap of the armature shaft The purpose is to provide an air gap control structure of the motor.

1 is a cross-sectional view showing a conventional cooling fan motor for a condenser,

2 is a cross-sectional view showing a cooling fan motor for a condenser of the present invention;

3 is an enlarged cross-sectional view of the end cover of FIG. 2;

♣ Explanation of symbols for main part of drawing ♣

50: housing 52: magnet

54: end cover 56: mounting bracket

60: Amateur shaft 62: Amateur

64: commutator 65: commutator edition

66: brush 68: spring

70, 72: First and second bearing 74: Washers

76: Retainer 78: O-ring

80: core 90: connector

Air gap adjustment structure of the cooling fan motor for a condenser of the present invention for achieving the above object has a housing having a magnet attached to the inner wall, an end cover coupled to the housing and an armature on the outer circumference and one end of a ball bearing. An armature shaft which is rotatably supported in the first accommodating portion of the housing and the other end is rotatably supported in the second accommodating portion of the end cover by a sintered bearing, and disposed between the armature and the end cover. A cooling fan motor for a condenser comprising a commutator and a brush for supplying electricity applied from a battery to the armature through the commutator in a state of being elastically pressurized by a spring, wherein one end of the armature shaft is connected to the housing by a first bearing. Rotatably mounted relative to the first housing, the other end of which is It is mounted rotatably with respect to the second housing of the end cover, characterized in that the water guide is installed on the outer end of the first housing is accommodated in the first bearing.

Hereinafter, an air gap adjusting structure of a cooling fan motor for a condenser according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3.

Figure 2 is a cross-sectional view showing a cooling fan motor for a condenser of the present invention, Figure 3 is an enlarged cross-sectional view of the end cover of FIG.

First, as shown in FIG. 2, when the overall configuration of a cooling fan motor for a condenser is shown, a housing 50 having a magnet 52 attached to an inner wall thereof, and an end cover 54 coupled to the housing 50 opposite to each other are shown. And an armature shaft 60 having an armature 62 on the outer circumference and rotatably supported in the housing 50 to which a cooling fan is fixed, at one end of the fan mounting portion 60a, A commutator 64 disposed between the end covers 54 and a brush 66 for supplying electricity applied from the battery to the armature 62 through the commutator 64 while being elastically pressed by the spring 68. )

In addition, a mounting bracket 56 having a fastening hole 56a is attached to the outer surface of the end cover 54, and the housing 50 and the end cover 54 are fixedly coupled to each other through a flange portion as in the prior art. do. Spacers 82 and 83 are fitted to both side surfaces of the core 80 inside the armature 62.

When electricity applied to the commutator piece 65 through the brush 66 by the operation of the air conditioner is supplied to the armature 62 through the wire 78, the rotation force is generated by the magnetic force of the magnet 52 and the armature shaft 60 Rotated). At this time, since the cooling fan is fixed to the fan mounting portion 60a formed at one end of the armature shaft 60, the cooling fan rotates at a high speed by the strong rotational force of the armature shaft 60 to cool the refrigerant flowing through the condenser.

In the cooling fan motor for the condenser of such a configuration, in the preferred embodiment of the present invention to change the shape of the end cover 54 in order to facilitate the air gap adjustment operation, the end cover 54 and the commutator 64 In the example, a structure in which a retainer 76 having an elastic force is mounted is illustrated.

Here, one end of the armature shaft 60 is rotatably mounted with respect to the housing 50 by a first bearing which is a shielded ball bearing 70, and the other end is mounted with respect to the end cover 54 by a second bearing. It was rotatably mounted. Here, the water guide 84 is attached to the outer end of the first housing portion 50a in which the first bearing is accommodated by welding or the like.

The second bearing, which is housed in the second housing portion 54a of the end cover 54 and rotatably supports the armature shaft 60, can be selectively used among the seal type ball bearing 30 and the sintered type. have.

In the cooling fan motor having such a configuration, a gap g adjusting washer 74 is fitted on the armature shaft 60 near the ball bearing 70, and a retainer 76 is provided between the end cover 54 and the commutator 64. It is arranged.

3 is an enlarged view of an end cover 54 of a cooling fan motor according to the present invention, and further shows a connector 90 for supplying battery power to the brush 66 as compared to FIG. 2.

The brush holder 67 in which the brush 66 and the spring 68 are incorporated is fixed to the inner side of the end cover 54 by the brush mounting plate 69, and the brush mounting plate 69 and the end cover 54 are fixed. The retainer pressure plate 77 is disposed between the two ends. In addition, the engaging end 92 of the connector 90 is inserted into the protrusion 54b of the end cover 54. External power applied from the battery through the wire harness inserted into the connection end 96 of the connector 90 is supplied to the brush 66 through the wire 94 in the connector 90.

The sintered bearing 72 is housed so as not to be separated from the second housing portion 54a of the end cover 54 by a stopper 73 which is crimped and fixed by the caulking 54a '. The O-ring 78 is sandwiched between the two storage portions 54a.

The inner race of the first bearing 70 is press-fitted and fixed to the knurled portion of the armature shaft 50, the washer 74 is fitted on the armature shaft 50 near the first bearing 70, and the armature shaft 50 The other end of) is elastically pressurized by a retainer pressure plate 77 inserted between the end cover 54 and the commutator 64, so that longitudinal separation and flow of the armature shaft 50 is restrained.

According to the present invention described above, by changing the structure of the end cover coupled to the housing to be able to select one of the ball bearing and the sintered bearing and at the same time, the adoption of a water guide to the shield type instead of the seal type ball bearing The cost can be reduced by using a ball bearing of (shield type). In addition, by changing the shape of the corner portion there is an advantage that can reduce the mounting space occupied by the cooling fan motor.

Claims (2)

It has a housing with a magnet attached to the inner wall, an end cover coupled to the housing, an armature at an outer circumference, and one end of which is rotatably supported in the first accommodating portion of the housing by a ball bearing, and the other end is connected to the sintered bearing. The armature shaft rotatably supported in the second housing portion of the end cover, a commutator disposed between the armature and the end cover, and electricity applied from the battery in a state of being elastically pressed by a spring through the commutator. In a cooling fan motor for a condenser comprising a brush supplied to the armature, A gap washer 74 is mounted on the armature shaft 60 near the ball bearing 70, and a retainer 76 is mounted on the armature shaft 60 between the end cover 54 and the commutator 64. Air gap control structure of the cooling fan motor for a capacitor. The method of claim 1, The retainer 76 is elastically mounted on one side of the retainer mounting plate 77 inserted and fixed between the end cover 54 and the commutator 64, the air gap control structure of the cooling fan motor for the condenser .