KR20150032978A - An air blower for fuel cell vehicle - Google Patents

Abstract

The present invention relates to an air blower for a fuel cell vehicle. According to an embodiment of the present invention, the air blower for a fuel cell vehicle has a flange portion formed on the outside in a radial direction at one end of a front bearing external wheel, and the flange portion is combined with a bearing liner by a guide pin. Therefore, the present invention can prevent vibration or noise generation when the air blower operates, and improve durability of the air blower by preventing the front bearing external wheel from being rotated with an internal wheel by vibration.

Description

[0001] The present invention relates to an air blower for a fuel cell vehicle,

The present invention relates to an air blower, and more particularly, to an air blower for a fuel cell vehicle, which prevents rotation of an outer ring of a front bearing due to vibration, reduces processing costs, and improves assembling performance.

Generally, the fuel cell vehicle is driven by using hydrogen supplied from the fuel supply unit and oxygen in the air supplied from the air supply unit is supplied to the humidifier and is continuously generated by the electrochemical reaction, which is the reverse reaction of electrolysis of water do.

Here, the fuel cell vehicle includes a fuel cell stack for producing electricity, a humidifier for humidifying and supplying fuel and air to the fuel cell stack, a fuel supply unit for supplying hydrogen to the humidifier, And a cooling module for cooling the fuel cell stack.

The air supply unit includes an air cleaner for filtering foreign substances contained in the air, an air blower for compressing and supplying the air filtered by the air cleaner, and a control box for controlling the air blower.

FIG. 1 is a cross-sectional view showing an example of a conventional air blower, FIG. 2 is an exploded perspective view of a conventional bearing cover and a cover member, and FIG. 3 is a joint sectional view of FIG.

1, the conventional air blower 10 includes an inflow duct 20 having an air inlet 21 into which external air flows in front, a motor 20 coupled to a rear end of the inflow duct 20, An impeller housing 40 which is coupled to the rear end of the motor housing 30 and has an air outlet 41 formed at one side thereof and a motor housing 30 installed inside the impeller housing 40 An impeller 42 that is rotated by the motor 31 and compresses the air and a rotatable support member 40 which is coupled to the rear end of the impeller housing 40 and rotatably supports the rotary shaft 32 and the impeller 42 of the motor 31, Member (50).

At this time, the air that has entered the inlet duct 20 through the air inlet 21 flows into the impeller 42 through the motor housing 30 and the impeller housing 40, and the impeller 42 42 and is discharged to the outside through the air discharge port 41 of the impeller housing 40. [

That is, air is introduced into the impeller 42 by the high-speed rotation of the impeller 42, and the pressure is rapidly increased while passing through the impeller 42 to be discharged to the outside.

2 and 3, a cover member 60 is coupled to the front of the motor housing 30 so as to cover a space where the motor 31 is mounted, The front end of the rotary shaft 32 is inserted into the bearing cover 80 to be rotatably supported by the front bearing 70 and the bearing cover 80 which closes the hollow 61 in front of the cover member 60 is engaged.

However, due to the structural characteristics of the air blower 10, when the impeller 42 is rotated at a high speed by the operation of the motor 31, the rotating shaft 32 is advanced forward in the axial direction, The front bearing 70 is floated to the cover member 60 so as to be movable in the axial direction.

However, when the rotating speed of the rotating shaft 32 is increased, the outer ring 71 of the front bearing 70 rotates together along the inner ring 72, causing structural vibration due to rotational vibration, And the operation efficiency of the air blower 10, such as generation of noise, abrasion or breakage of the front bearing 70 or the rotary shaft 32, is reduced.

A fixing groove 62 is formed on one side wall of the hollow 61 of the cover member 60 and a bearing bush 90 and a wave washer 93 are mounted on the rear side of the front bearing 70 . Reference numerals 94 and 95 denote fasteners such as a stopper member and a screw, respectively.

At this time, a fixing protrusion 91, which is coupled to the fixing groove 62, is protruded from one side of the outer peripheral surface of the bearing bush 90. An insertion protrusion 92 is formed on the other side of the outer peripheral surface of the bearing bush 90 so as to be coupled with an insertion groove (not shown) formed at the rear end of the outer ring 71 of the front bearing 70.

That is, the insertion protrusion 92 of the bearing bush 90 is engaged with the insertion groove of the outer bearing 71 of the front bearing 70, and the fixing protrusion 91 is engaged with the fixing groove 62 of the inner wall of the hollow 61 The rotation of the outer ring 71 is prevented by the bearing bush 90. [

When fixing the outer ring 71 of the front bearing 70 using the bearing bushing 90 as described above, the fixing groove 62 is formed on the inner wall of the hollow 61 of the cover member 60 , The insertion groove must be machined in the outer ring 71 of the front bearing 70, which results in an increase in the machining cost due to the groove machining, which is a factor for lowering the price competitiveness of the product.

When the air blower 10 is assembled, the fixing projections 91 of the bearing bushes 90 are accurately engaged with the fixing grooves 62 of the cover member 60 and the bearing bushes 90 need to be precisely engaged with each other. However, it takes much time to assemble these parts, and there is also a problem that there is a high possibility of occurrence of defects.

KR 10-2013-0024096 A (March 3, 2013 open)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing a magnetic recording medium, And it is an object of the present invention to provide an air blower for a fuel cell vehicle which can prevent the occurrence of vibration by suppressing the rotation of the outer ring of the bearing.

According to a preferred embodiment of the present invention, a motor housing is provided in which a space is formed so that a motor can be installed therein. A bearing liner coupled to a front end of the motor housing; And a front bearing which is received in the bearing liner and rotatably supports the rotational shaft of the motor, wherein the outer ring of the front bearing has a flange portion extending in the radial direction and at least one guide pin And an air blower for a fuel cell vehicle is inserted into one side of the bearing liner through the flange portion.

Here, the front bearing is axially flowable along the guide pin.

The bearing liner includes a ring-shaped body portion and an insert portion formed on the inner side of the body portion in a circumferential direction, the guide pin passing through a flange hole formed at one side of the flange portion, Is inserted into the liner groove formed on one side.

At this time, the width of the guide pin is smaller than the width of the flange hole.

And a stopper member that is screwed to the front end of the rotating shaft and presses and supports the front end of the inner ring of the front bearing.

And a bearing cover coupled to the front end of the bearing liner to cover the front bearing.

At this time, it is preferable that a ring-shaped plate of elastic material is interposed between the ring-shaped ring and the outer ring of the front bearing.

The air blower for a fuel cell vehicle according to the preferred embodiment of the present invention can prevent the rotation of the outer ring of the front bearing, thereby preventing the occurrence of vibration and noise during operation of the air blower and improving the durability of the front bearing.

Also, since the front bearing can be easily assembled as compared with the conventional art, manufacturing cost and time can be saved, and occurrence of defects can be prevented, thereby improving productivity.

In addition, it is possible to eliminate the wave washer that was previously mounted to pre-press the front bearing and the bearing bush which was mounted to prevent rotation of the outer ring, thereby reducing the cost due to the simplification of the structure and the reduction of the number of parts.

1 is a cross-sectional view showing an example of a conventional air blower.
2 is an exploded perspective view of a conventional bearing cover and cover member.
Figure 3 is an assembled sectional view of Figure 2;
4 is an exploded perspective view showing a mounting structure of a front bearing according to an embodiment of the present invention;
5 is a sectional view of a mounting structure of a front bearing according to an embodiment of the present invention;
6 is a perspective view of a front bearing according to an embodiment of the present invention;

Hereinafter, preferred embodiments of an air blower for a fuel cell vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

Example

FIG. 4 is an exploded perspective view showing a mounting structure of a front bearing according to an embodiment of the present invention, FIG. 5 is a sectional view of a mounting structure of a front bearing according to an embodiment of the present invention, Fig.

4 and 5, an air blower 100 for a fuel cell vehicle according to an exemplary embodiment of the present invention includes a motor housing 200 having a motor 210 installed therein, A bearing liner 300 coupled to the front end of the motor housing 200 and a front bearing 300 housed in the bearing liner 300 and rotatably supporting the front end of the rotating shaft 220 of the motor 210 400).

Although not shown in the drawing, an inlet duct 20 (see FIG. 1) through which external air flows is coupled to the front of the motor housing 200, and an impeller 42 is provided at the rear of the motor housing 200 1) to which the impeller housing 40 (see Fig. 1) is attached. A support member 50 (see FIG. 1) for rotatably supporting the rear end of the rotary shaft 220 may be coupled to the rear of the impeller housing.

According to an embodiment of the present invention, the front end edge of the motor housing 200 is bent and extended radially inward, and a bearing liner fitting hole 230 is formed at the center thereof.

The bearing liner 300 is coupled to the front end of the motor housing 200 and is preferably finsed into a seating groove 240 formed along the rim of the bearing liner fitting hole 230. Of course, if necessary, it is also possible to fasten the bearing liner 300 to the front end of the motor housing 200 using fasteners or bolts.

The bearing liner 300 includes a ring-shaped body portion 310 and an insertion portion 320 formed in the inner side of the body portion 310 in a circumferential direction and formed with a hollow portion 321 at the center . When inserting the bearing liner 300 into the motor housing 200, the inserting portion 320 of the bearing liner 300 is inserted into the bearing liner fitting hole 230 of the motor housing 200, And is supported in the seating groove 240.

The front bearing 400 is received in the hollow 321 of the bearing liner 300. 6, the front bearing 400 is formed with a flange portion 430 extending radially outwardly from one end of the outer ring 420. The flange portion 430 is spaced apart from the flange portion 430, (431) is formed to pass therethrough.

Referring again to FIGS. 4 and 5, when assembling the front bearing 400 to the bearing liner 300, the flange portion 430 of the front bearing 400 is seated in the step 330 of the bearing liner 300, The outer circumferential surface of the outer ring 420 is adjacent to the inner circumferential surface of the insertion portion 320 of the bearing liner 300. At least one liner groove 331 is formed along the circumferential direction at the step 330 of the bearing liner 300. The liner groove 331 corresponds to the flange hole 431 of the front bearing 400. [ At this time, the guide pin 500 is press-fitted into the liner groove 331 through the flange hole 431.

The width of the guide pin 500 passing through the flange hole 431 is slightly smaller than the width of the flange hole 431. Accordingly, the front bearing 400 is movable in the axial direction of the rotating shaft 220 along the guide pin 500. The outer circumferential surface of the outer race 420 of the front bearing 400 and the inner circumferential surface of the insertion portion 320 of the bearing liner 300 and the outer circumferential surface of the flange portion 430 It is preferable that a slight gap be formed between the inner circumferential surfaces of the body portion 310 of the bearing liner 300.

The number of the guide pins 500 may be freely selected as needed. Preferably, the pair of guide pins 500 are spaced apart from each other by 180 degrees with respect to the center line of the front bearing 400.

When the flange portion 430 of the front bearing 400 is coupled to the step 330 of the bearing liner 300 by at least one guide pin 500, Is constrained by the guide pin (500). Accordingly, it is possible to prevent the outer ring 420 of the front bearing 400 from rotating together with the inner ring 410 as the rotational speed of the rotating shaft 220 increases.

That is, according to the embodiment of the present invention, the operation of the air blower 100, such as the occurrence of structural vibration and noise due to the diaphragm phenomenon of the outer ring 420, the wear or breakage of the front bearing 400 or the rotary shaft 220, It is possible to prevent the problem of lowering the efficiency.

In addition, since the bearing liner 300 and the front bearing 400 can be easily assembled and the conventional bearing bush 90 (see FIG. 2) and the wave washer 93 (see FIG. 2) can be eliminated, The manufacturing cost and time are saved, and the productivity is improved.

The stopper member 600 is screwed to the front end of the rotating shaft 220 so as to pressurize the front end of the inner ring 410 of the front bearing 400. [ A stopper member engaging portion 221 having a screw thread formed on the outer circumferential surface is protruded from the front end of the rotating shaft 220. A stopper member 600 is screwed to the stopper member engaging portion 221. [ At this time, the rear end of the stopper member 600 presses and supports the front end of the inner ring 410 of the front bearing 400 in the axial direction.

The bearing engaging portion 222 may be stepped on the rear side of the stopper member engaging portion 221 in the rotating shaft 220 to a greater width than the stopper member engaging portion 221. At this time, 410 are coupled to the outer circumferential surface of the bearing engagement portion 222.

A bearing cover 700 that covers the front bearing 400 is coupled to the front of the bearing liner 300 to prevent external moisture or foreign matter from entering the front bearing 400. [ The bearing cover 700 has a space portion 710 for receiving the front end portion of the rotating shaft 220 and the stopper member 600 therein and has a plurality of fasteners whose outer edge portions are spaced from each other in the circumferential direction To the body portion 310 of the bearing liner 300. The tapered portion 720 protrudes in the direction of the front bearing 400 along the rim of the space portion 710 of the bearing cover 700. The tapered portion 720 of the bearing cover 700 protrudes in the direction of the front bearing 400, Vibration and impact can be absorbed through the ring plate 800 made of an elastic material between the upper and lower plates 420.

The air blower 100 according to an embodiment of the present invention is configured such that when the rotation shaft 220 is rotated by the operation of the motor 210, the inner wheel 410 of the front bearing 400 and the stopper member (600) rotates.

The guide pin 500 is inserted into the bearing liner 300 through the flange portion 430 formed on the outer ring 420 of the front bearing 400 so that the outer ring 420 of the front bearing 400 The rotation is restricted by the guide pin (500). It is preferable that the width of the flange hole 431 of the outer ring 420 is larger than the width of the guide pin 500 so that axial flow of the front bearing 400 is possible.

100: air blower 200: motor housing
210: motor 220: rotary shaft
230: Bearing liner coupling hole 240:
300: Bearing liner 331: Liner groove
400: front bearing 410: inner ring
420: outer ring 430: flange portion
431: flange hole 500: guide pin
600: Stopper member 700: Bearing cover
800: ring plate

Claims (7)

A motor housing (200) in which a space is formed so that a motor (210) is installed therein;
A bearing liner 300 coupled to a front end of the motor housing 200; And
And a front bearing (400) accommodated in the bearing liner (300) and rotatably supporting a rotating shaft (220) of the motor (210)
At least one guide pin 500 penetrates through the flange portion 430 and is inserted into the bearing liner 430. The flange portion 430 extends in the radial direction of the outer ring 420 of the front bearing 400, 300). ≪ / RTI >
The method according to claim 1,
Wherein the front bearing (400) is axially flowable along the guide pin (500).
The method according to claim 1,
The bearing liner 300 includes a ring-shaped body portion 310 and an insertion portion 320 formed on the inner side of the body portion 310 along a circumferential direction,
The guide pin 500 is inserted into a liner groove 331 formed at one side of the insertion portion 320 through a flange hole 431 formed at one side of the flange portion 430. Battery air blower.
The method of claim 3,
Wherein a width of the guide pin (500) is smaller than a width of the flange hole (431).
The method according to claim 1,
Further comprising a stopper member (600) screwed to the front end of the rotating shaft (220) to pressurize and support the front end of the inner ring (410) of the front bearing (400).
The method according to claim 1,
Further comprising a bearing cover (700) coupled to a front end of the bearing liner (300) so as to cover the front bearing (400).
The method of claim 6,
A ring 720 is protruded from one side of the bearing cover 700 and an elastic ring plate 800 is interposed between the ring 720 and the outer ring 420 of the front bearing 400 The air blower for a fuel cell vehicle.

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