JP2002081396A - Cross flow fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cross flow fan capable of being assembled certainly and easily so that an axis center may not be deviated each other by connecting an end plate and an impeller by a connection shaft. SOLUTION: A boss part 13b of a connection shaft 13 is connected to an insertion hole of a second end plate 10, an engagement part 13b of the connection shaft is engaged with an engagement hole 6 of the second impeller 8 and a screw part 13a is thread-attached to a screw hole 3. Thereby, an assembling is carried out while the second end plate is connected to a side end of the second impeller and the second impeller is subsequently connected to the first impeller 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow blower used in an air conditioner or the like, and more particularly, to prevent end axes or impellers from being displaced from each other by connecting them with connecting shafts. The present invention relates to a structure which can be assembled accurately and easily.

[0002]

2. Description of the Related Art A conventional cross-flow blower is used in an air conditioner, for example, as shown in FIG. 1 and FIGS.
As shown by (C), a heat exchanger d is provided in an air passage connecting an intake port b provided in the upper front and upper surfaces of the air conditioner main body a and an outlet c provided in the lower front face. A circular first end plate 1 having a rotating shaft 2 ′ rotatably supported by a bearing part g provided on a casing a ′ at the center of the outer surface, and a first end plate 1. A first impeller 5 comprising a plurality of blades 4 erected on an inner peripheral portion of the inner surface 1
And a plurality of blades 4 erected on the outer peripheral portion of the inner surface of the partition plate 7 sequentially connected to the first impeller 5.
And the casing connected to a side end of the second impeller 8.
and a circular second end plate 10 provided with a boss 12 'connected to a drive shaft 11a of a drive motor 11 provided on a'.

However, when the second impeller 8 is sequentially connected to the first impeller 5, the work time required for welding for connecting the second impeller 8 is poor, resulting in a long work time or misalignment with each other. Assembling accuracy may deteriorate,
Further, at the time of recycling, there is a problem that it is necessary to separate materials after crushing.

A connecting portion between the boss portion 12 'and the drive shaft 11a is formed by inserting a tip end of the drive shaft 11a into the boss portion 12' and fixing a screw provided on the boss portion 12 '. Since the flat portion 11b formed at the distal end portion is screwed by the screw 20 screwed into the hole and a screw lock agent is applied to the screwed portion, the workability of assembly is poor. However, there has been a problem that the eccentricity occurs in the center of rotation of the boss portion 12 'due to the mass of the screw 20 or the screw lock agent, which causes vibration and noise.

Further, for example, when the screwing by the screw 20 is insufficient, as shown by an arrow k in FIG. There is a possibility that the first end plate 1 may move and come into contact with the side surface of the bearing portion g.

[0006]

In the present invention, in view of the above problems, by connecting the end plates and the impellers by connecting shafts, it is possible to accurately displace the axial centers from each other.
It is another object of the present invention to provide a cross flow blower that can be easily assembled.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a circular shaft having a rotary shaft rotatably supported by a bearing portion at the center of the outer surface and a screw hole at the center of the inner surface. A first impeller composed of one end plate and a plurality of blades erected on an inner peripheral portion of the inner surface of the first end plate, and sequentially connected to the first impeller, the fitting being concentric with the screw hole; A second impeller comprising a circular partition plate having a hole at the center thereof, and a plurality of blades erected on an inner peripheral portion of the inner surface of the partition plate; A circular second end plate having an insertion hole connected to the hole at the center, a boss connected to the drive shaft of the drive motor at one end and connected to the insertion hole, and screwed to the screw hole at the other end. A connection shaft provided with a fitting portion corresponding to the fitting hole between the boss portion and the screw portion. By connecting a boss portion of the connecting shaft to the insertion hole, fitting the fitting portion into the fitting hole, and screwing the screw portion into the screw hole, a side end of the second impeller is provided. The second end plate is connected, and the second impeller is sequentially connected to the first impeller and assembled.

Further, while the fitting hole is formed of a polygonal hole,
The fitting portion is configured by a polygonal portion that fits into the polygonal hole.

Further, the partition plate has an outer peripheral portion on which the plurality of blades are erected, an inner peripheral portion having the fitting hole, and a plurality of spoke portions connecting between the outer peripheral portion and the inner peripheral portion. It is composed of

[0010] The spokes are arranged at equal intervals.

[0011] Further, a concave hole for accommodating and positioning the tips of the plurality of blades is formed in the outer peripheral portion of the partition plate.

Further, a flat portion is formed at an outer peripheral end of the drive shaft, and a connection hole of the boss portion for connecting the drive shaft is formed in a bottomed cylindrical shape having a flat portion corresponding to the flat portion. On the other hand, the rotary shaft is provided with a stopper for regulating the first end plate so as not to approach the side surface of the bearing portion.

Further, a plurality of the flat portions and the flat portions are formed in the outer peripheral end portion of the drive shaft and the connection hole of the boss portion, respectively.

Further, a small clearance is provided between the stopper and the side surface of the bearing portion and / or between the drive shaft and the bottom surface of the connection hole.

Further, the first impeller and the second impeller, a part of the first end plate connected to the first impeller, and the second end connected to the second impeller. A part of the plate and at least the boss portion are made of synthetic resin, and a part of the first end plate and the rotation shaft, and a part of the second end plate and the boss portion are separated from the drive shaft. It is configured to be connected via a vibration isolating member that absorbs vibration.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as examples. FIG. 1 is a cross-sectional view of an air conditioner using a cross flow blower according to the present invention (and a conventional example). FIG. 2 is an explanatory view of a main part of the cross flow blower according to the present invention. (B) is an exploded perspective view of a portion f shown in (A), (C) is an exploded perspective view showing a first end plate and a rotating shaft, and FIG. 3 is an explanatory view of a cross flow blower according to the present invention. (A) is a front view showing a state of being assembled to a casing of an air conditioner, and (B) is an A shown in (A).
FIG. 4C is a detailed view showing an embodiment of a portion B shown in FIG. 4A, FIG. 4 is a view for explaining main parts of a cross flow blower according to the present invention, and FIG. 3B is an exploded perspective view of FIG. 3C, FIG. 5 is a detailed view showing another embodiment of the portion B in FIG. 3A, and FIG. FIG. 3B is a cross-sectional view, and FIG.

In the figure, the structure of an air conditioner using a cross flow blower according to the present invention is the same as that of the above-described prior art, so that the description is omitted, and the structure of the cross flow blower e will be described in detail below. I do.

A rotary shaft 2 rotatably supported by a cross-flow blower e by a bearing g provided on a casing a '.
A first end plate 1 having a circular first end plate 1 having a screw hole 3 at the center of the inner surface, and a plurality of blades 4 erected on the outer peripheral portion of the inner surface of the first end plate 1. A circular partition plate 7 which is sequentially connected to the wheel 5 and the first impeller 5 and has a fitting hole 6 concentric with the screw hole 3 at the center thereof, and is provided upright on the inner peripheral portion of the partition plate 7. Second impeller 8 comprising a plurality of wings 4
And a circular second end plate 10 which is connected to the side end of the second impeller 8 and has an insertion hole 9 at the center connected to the fitting hole 6 at the center, and is connected at one end to a drive shaft 11a of a drive motor 11. The insertion hole 9
A boss 12 connected to the boss 12 and a screw 13a screwed into the screw hole 3 at the other end, and a fitting corresponding to the fitting hole 6 between the boss 12 and the screw 13a. A connecting shaft 13 having a portion 13b, a boss 12 of the connecting shaft 13 is connected to the insertion hole 9, the fitting portion 13b is fitted in the fitting hole 6, and the screw portion 13a is By screwing into the screw hole 3, the second end plate 10 is connected to a side end of the second impeller 8, and the second impeller 8 is sequentially connected to the first impeller 5. As a result, the workability and assembling accuracy of the assembly are deteriorated, and the workability for separating the materials at the time of recycling is deteriorated. Or the eccentricity of the center of rotation causes vibration and noise. You will be able to solve each of the issues.

That is, the boss portion 12 is connected to the insertion hole 9, the fitting portion 13b is fitted in the fitting hole 6, and the screw portion 13a is screwed into the screw hole 3. While connecting the second end plate 10 to a side end of the second impeller 8,
Since the second impeller 8 is assembled while being sequentially connected to the first impeller 5, the components described above are sequentially stabbed around the connection shaft 13 without causing misalignment with each other. As a result of assembly, the workability of assembly and disassembly can be improved.

The fitting hole 6 is formed of a polygonal hole, while the fitting portion 13b is formed of a polygonal portion which fits in the polygonal hole.
The rotation of the eleventh drive shaft 11a can be accurately transmitted to the second impeller 8 without loss.

The partition plate 7 includes an outer peripheral portion 7a on which the plurality of blades 4 are erected and an inner peripheral portion 7b having the fitting hole 6.
And a plurality of spoke portions 7c arranged at equal intervals so as to connect between the outer peripheral portion 7a and the inner peripheral portion 7b, so that the dynamic balance at the time of rotation of the second impeller 8 can be improved. The partition plate 7 is not ventilated and causes vibration and noise, and the partition plate 7 can be provided with ventilation, so that the blowing performance as a crossflow blower can be improved.

The outer peripheral portion 7a of the partition plate 7 is formed with a recessed hole 7d for receiving and positioning the tip portions of the plurality of blades 4, so that the second shaft can be centered on the connecting shaft 13. When connecting the second end plate 10 to a side end of the impeller 8 and assembling the second impeller 8 while sequentially connecting the second impeller 8 to the first impeller 5, the tip ends of the plurality of blades 4 are recessed. It is possible to easily and accurately receive and position the hole 7d in the hole 7d, thereby improving the workability and the assembly accuracy of the assembly.

FIG. 3A to FIG. 3 show one embodiment.
As shown in FIG. 4 (C) and FIGS. 4 (A) and 4 (B), a flat portion 11b is formed at the outer peripheral end of the drive shaft 11a, and the boss portion 12 connecting the drive shaft 11a is formed. Is formed in a bottomed cylindrical shape with a flat portion 12b corresponding to the flat portion 11b, while the first end plate 1 does not approach the rotating shaft 2 near the side surface of the bearing portion g. A stopper formed of a step portion for regulating the position of the drive shaft 11a is provided by joining the flat portion 12b of the drive shaft 11a to the flat portion 12b of the connection hole 12a. Of the connection shaft 13 via the boss 12
And the rotation shaft can be accurately transmitted as in the prior art described above with reference to FIG.
2 ′ moves in the axial direction, and the first end plate 1 is
This eliminates the risk of contacting the side of the vehicle.

As another embodiment, as shown in FIGS. 5 (A) and 5 (B), the flat portion 11b and the flat portion 12b are formed by the outer peripheral end of the drive shaft 11a and the boss portion 12b. Are formed in the connecting holes 12a ', respectively, so that the rotational center of gravity of the boss 12 and the drive shaft 11a does not become eccentric, and the drive torque of the drive motor 11 is reduced by the drive shaft. 11a from the boss
12 can be more accurately communicated. The cross-sectional shape of the outer peripheral tip of the drive shaft 12 and the connection hole 12a '
Although not shown, for example, by forming the shape into a triangular shape, a quadrangular shape, or the like, the above-described operation and effect becomes more remarkable.

As shown in FIGS. 3B and 3C and FIG. 5A, the stopper and the bearing g
Between the drive shaft 11a and the bottom surfaces of the connection holes 12a and 12a '. 2 can move in the axial direction so as not to come into contact with the first end plate 1, and the clearance h allows the crossflow blower e to have a play and rotate smoothly. Become like

As shown in FIGS. 3 (B) and 3 (C), FIGS. 4 (A) and 4 (B), and FIG. 5 (A), the first impeller 5 and the A second impeller 8, a part of the first end plate 1 connected to the first impeller 5, a part of the second end plate 10 connected to the second impeller 8, and at least the The boss portion 12 is made of synthetic resin, and a part of the first end plate 1 and the flange of the rotary shaft 2 and a part of the second end plate 10 and the flange 12c of the boss portion 12 are formed of a metal ring. 1a and 10a, connecting plates 1c and 10
The first end plate which constitutes the cross flow blower e is connected by interposing a plate-shaped vibration isolating member 10b made of synthetic rubber for absorbing vibration from the drive shaft 11a between the first end plate and the second end plate. 1. The second end plate 10, the boss 12 and the like are made lighter and more cost-effective than those made of an alloy, and the drive motor transmitted from the drive shaft 11a.
The vibration of 11 can be effectively absorbed by the vibration isolating member 10b, and a structure that does not generate noise due to the vibration is obtained.

With the above configuration, FIG. 1, FIGS. 2A to 2C, FIGS. 3A to 3C, and FIG.
(A) and FIG. 4 (B), FIG. 5 (A) and FIG.
(B), the boss portion 12 of the connecting shaft 13 is connected to the insertion hole 9, the fitting portion 13b is fitted to the fitting hole 6, and the screw portion 13a is connected to the screw hole. 3 to connect the second end plate 10 to the side end of the second impeller 8 and to assemble the second impeller 8 while sequentially connecting the second impeller 8 to the first impeller 5. Therefore, as in the prior art described above, the workability and assembling accuracy of the assembly are deteriorated, the workability for separating materials at the time of recycling is deteriorated, and the eccentricity of the rotation center is generated. Therefore, the cross-flow blower can solve the problems of causing vibration and noise.

[0028]

As described above, according to the present invention,
By connecting the end plates and the impeller with the connecting shaft, a cross-flow blower can be accurately and easily assembled without displacing the axes.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an air conditioner using a crossflow blower according to the present invention and a conventional example.

FIG. 2 is an explanatory view of a main part of a cross flow blower according to the present invention,
(A) is a perspective view, (B) is an exploded perspective view of a part f shown in (A), and (C) is an exploded perspective view showing a first end plate and a rotating shaft.

FIG. 3 is an explanatory view of a cross flow blower according to the present invention, (A)
FIG. 2 is a front view showing a state of being assembled to a casing of the air conditioner, FIG. 2 (B) is a detailed view of a portion A shown in FIG. 2 (A), and FIG. 2 (C) is an embodiment of a portion B shown in FIG. FIG.

FIG. 4 is an explanatory view of a main part of a cross flow blower according to the present invention,
3A is a side view of FIG. 3C, and FIG.
It is an exploded perspective view of (C).

FIGS. 5A and 5B are detailed views showing another embodiment of the portion B in FIG. 3A, wherein FIG. 5A is a cross-sectional view of a main part, and FIG. 5B is an exploded perspective view of the main part.

FIG. 6 is an explanatory view of a cross-flow blower according to a conventional example, (A)
FIG. 2 is a front view showing a state where the casing is assembled to the casing of the air conditioner, FIG. 2 (B) is a detailed view of an A ′ section shown in FIG. 1 (A), and FIG. It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st end plate 1a Metal ring 1b Vibration-proof member 1c Connection plate 2 Rotating shaft 3 Screw hole 4 Blade 5 First impeller 6 Fitting hole 7 Partition plate 7a Outer peripheral part 7b Inner peripheral part 7c Spoke part 7d Concave hole 8th Two impeller 9 Insertion hole 10 Second end plate 10a Metal ring 10b Anti-vibration member 11 Drive motor 11a Drive shaft 11b, 11b 'Flat portion 12 Boss portion 12a, 12a' Connection hole 12b, 12b 'Flat portion 12c Flange 13 Connection shaft 13a Screw part 13b Fitting part 14 Through hole a Air conditioner body a 'Casing b Suction port c Outlet d Heat exchanger e Cross-flow blower g Bearing part h Clearance

Claims (9)

[Claims] 1. A circular first end plate having a rotary shaft rotatably supported by a bearing portion at the center of the outer surface, a screw hole provided at the center of the inner surface, and an outer peripheral portion of the inner surface of the first end plate. A first impeller composed of a plurality of erected wings, a circular partition plate sequentially connected to the first impeller, and provided with a fitting hole concentric with the screw hole at the center; A second impeller comprising a plurality of blades erected on the outer peripheral portion of the inner surface of the second impeller, and a second circular impeller connected to a side end of the second impeller and having an insertion hole connected to the fitting hole at the center. An end plate, comprising a boss connected to the drive shaft of the drive motor at one end and connected to the insertion hole, and a screw portion screwed into the screw hole at the other end, and the boss portion and the screw portion A connection shaft provided with a fitting portion corresponding to the fitting hole, a boss portion of the connection shaft being connected to the insertion hole, and The second end plate is connected to a side end of the second impeller by fitting the screw portion into the screw hole, and the second impeller is sequentially fitted to the fitting hole. A cross flow blower characterized by being assembled while being connected to a first impeller. 2. The cross flow blower according to claim 1, wherein the fitting hole comprises a polygonal hole, and the fitting portion comprises a polygonal portion which fits into the polygonal hole. 3. The partition plate has an outer peripheral portion on which the plurality of blades are erected, an inner peripheral portion having the fitting hole, and a plurality of spoke portions connecting between the outer peripheral portion and the inner peripheral portion. 2. The cross flow blower according to claim 1, wherein the blower comprises: 4. The cross flow blower according to claim 3, wherein said spoke portions are arranged at equal intervals. 5. The method according to claim 1, wherein a recessed hole is formed in an outer peripheral portion of the partition plate for receiving and positioning the tip portions of the plurality of blades. The cross-flow blower as described. 6. A flat portion is formed at an outer peripheral end portion of the drive shaft, and a connection hole of the boss portion connecting the drive shaft is formed into a bottomed cylindrical shape having a flat portion corresponding to the flat portion. The cross flow blower according to claim 1, wherein a stopper is provided on the rotating shaft to restrict the first end plate from approaching a side surface of the bearing portion. 7. The cross-flow blower according to claim 6, wherein a plurality of the flat portions and the flat portions are formed in an outer peripheral end portion of the drive shaft and a connection hole of the boss portion, respectively. . 8. The crossing according to claim 6, wherein a small clearance is provided between the stopper and a side surface of the bearing portion and / or between the drive shaft and a bottom surface of the connection hole. Flow blower. 9. The first impeller and the second impeller, a part of the first end plate connected to the first impeller, and the second end connected to the second impeller. A part of the plate and at least the boss portion are made of synthetic resin, and a part of the first end plate and the rotation shaft, and a part of the second end plate and the boss portion are separated from the drive shaft. The cross flow blower according to claim 1, wherein the blower is connected via a vibration isolating member that absorbs vibration.