JP2002161888A - Fan device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan device capable of being simply and accurately assembled and stably connecting a fan rotor and a motor rotor. SOLUTION: The fan device is provided with a motor rotor 4 and a fan rotor 5. A projection 9 in the axis direction is provided on a center part of the motor rotor 4. A vibration isolating material 6 for a bearing is attached to a center part of a side wall 18 of the fan rotor 5 and the projection 9 in the axis direction is engaged with the vibration isolating material 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan device, and more particularly to a fan device such as a cross flow fan used for an indoor unit of an air conditioner.

[0002]

2. Description of the Related Art Conventionally, as a fan device such as an air conditioner, for example, as shown in FIG. 9, a motor unit 51 and a fan unit 52 are provided, and the motor unit 51 comprises a fixed shaft 53 and a fixed shaft 53. And a motor rotor 5 rotatably disposed around a fixed shaft 53.
5 and the fan section 52 has a fan rotor 56. The stator 54 of the motor unit 51 is
And a coil 58 wound around the teeth of the core 57. The motor rotor 55 includes a short cylindrical rotor main body 59 and a rotor magnet 60 fixed to the inner peripheral surface of the rotor main body 59. Rotor body 59
Consists of a large diameter first part 61 and a small diameter second part 62,
The rotor magnet 6 is formed in an annular shape on the inner peripheral surface of the first portion 61.
0 is mounted, and a bearing 63 is provided in the second part 62. The bearing 63 is inserted and fixed to the fixed shaft 53, and the motor rotor 55 is fixed to the fixed shaft 5 via the bearing 63.
3 rotatably supported.

Further, the motor rotor 55 and the fan rotor 56 are connected via a connecting member 64. In this case, the connecting member 64 is formed of a ring body having a U-shaped cross section, and the wall on the side of the fan 52 is a side wall 65 of the fan rotor 56.
And the wall on the motor section 51 side is
Is attached to the side wall 66 of the main body.

[0004]

However, in the above-mentioned conventional fan device, it is necessary to form the motor portion 51 and the fan portion 52 separately and then assemble them. It was bad. Also, the motor unit 51
There is a possibility that a gap may be formed between the motor unit 51 and the fan unit 52, and the fan unit 52 may bend with respect to the motor unit 51, or the motor unit 51 may be bent with respect to the fan unit 52.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and has as its object to enable easy and accurate assembly and to stably connect a fan rotor and a motor rotor. It is an object of the present invention to provide a fan device capable of performing the following.

[0006]

Accordingly, a fan device according to a first aspect of the present invention is a fan device having a motor rotor 4 and a fan rotor 5, wherein a centrally projecting portion 9 is provided at the center of the motor rotor 4. A vibration isolator 6 for a bearing is mounted at the center of one side wall of the fan rotor 5, and the axially projecting portion 9 is fitted to the vibration isolator 6.

In the fan device according to the first aspect, the vibration isolator 6 mounted on the center of one side wall of the fan rotor 5 includes:
By fitting the projecting portion 9 in the axial direction of the motor rotor 4, the fan rotor 5 and the motor rotor 4 can be easily connected, and the axial alignment of the motor rotor 4 can be performed accurately. In addition, since it also serves as a connecting member for connecting the fan rotor 5 and the motor rotor 4, the number of parts can be reduced.

According to a second aspect of the present invention, the motor rotor
And the fan rotor 5 are connected to each other via a vibration isolator,
The fixed shaft 1 is inserted into the shaft hole 19 of the vibration isolator 6, and the rotating body 3 is connected to the shaft center of the fixed shaft 1 via a bearing 41 mounted in the vibration isolator 6. It is characterized by being arranged so as to be rotatable around.

In the fan device of the second aspect, the motor rotor 4 and the fan rotor 5 are connected to each other via the vibration isolator to form the rotating body 3, and the bearing 41 is mounted in the shaft hole 19 of the vibration isolator 6. Since the fixed shaft 1 to be inserted is inserted, the axial center of the fan rotor 5 can be accurately aligned.
Easy assembly work and excellent productivity.

According to a third aspect of the present invention, the axially projecting portion 9 of the motor rotor 4 includes a long projecting portion 10 and a short projecting portion 1.
1 and the long protrusion 1
It is characterized in that a long fitting portion 22 in which 0 is fitted and a short fitting portion 23 in which the short projecting piece portion 11 is fitted are provided.

In the fan device of the third aspect, the long projecting piece 10 of the motor rotor 4 is fitted in the long fitting section 22 of the vibration isolator 6, and the short projecting piece 11 of the motor rotor 4 is fitted in the vibration isolator 6. Since the motor fan 4 is stably fitted to the short fitting portion 23, the motor fan 4 is stably connected to the vibration isolator 6, and the short projecting portion 11 of the long projecting portion 10 is
The more protruding part becomes the rotational torque transmission part,
The fan rotor 5 and the motor rotor 4 rotate integrally in a stable state.

According to a fourth aspect of the present invention, there is provided the fan device,
0 and short projecting pieces 11 are alternately arranged along the circumferential direction.

In the fan device of the fourth aspect, since the long projecting pieces 10 and the short projecting pieces 10 are alternately arranged along the circumferential direction, the positioning in the radial direction can be accurately performed. .

According to a fifth aspect of the present invention, there is provided the fan device,
In addition, a lip portion 34 is provided which presses against the motor rotor 4 to bring the vibration isolator 6 and the motor rotor 4 into close contact with each other.

In the fan device of the fifth aspect, the motor rotor 4 can be brought into close contact with the vibration isolator 6 by the lip portion 34, and the motor rotor 4 and the vibration isolator 6 are connected in a stable state. It becomes possible.

[0016]

Next, a specific embodiment of the fan device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a main part of a fan device according to the present invention. The fan device is used for an indoor unit such as an air conditioner, for example, and is coaxially fixed to a fixed shaft (shaft) 1 and the fixed shaft 1. (A stator) 2 and a rotating body 3. The stator 2 is shown in a simplified manner in the drawing, but has a core and a coil wound around the teeth of the core, and the fixed shaft 1 is inserted and fixed in an axial hole of the core.

The rotating body 3 includes a motor rotor 4, a fan rotor 5, and a vibration isolator 6 for connecting these. As shown in FIGS. 4 and 5, the motor rotor 4 has a disk-shaped main body 7 having an axial hole, a ring-shaped flange 8 protruding from an outer peripheral edge of the main body 7 in the axial direction, and a main body. A cylindrical axial projection 9 protrudes from the periphery of the axial hole 7 in a flange 8 in the opposite axial direction. The axial projection 9 is
A long protruding piece 10 and a short protruding piece 11 are provided, and the long protruding pieces 10 and the short protruding pieces 11 are alternately and continuously arranged in the circumferential direction. In this case, the long projecting piece 10 is
A first part 12 and a second part 13 connected to the first part 12
The short protruding piece 11 also includes a first part 14 and a second part 15 connected to the first part 14, and the thickness of the second part 13 of the long protruding piece 10 is reduced. The thickness is larger than the thickness of the second portion 15 of the short projecting piece 11. That is, the first protruding piece 10
The outer diameter of the first part 14 of the portion 12 and the short part 11 is the same, and the outer diameter of the second part 13 of the long part 10 is the short part 11.
The second part 15 is larger than the outer diameter. here,
Each outer diameter dimension is a dimension from the axis to the outer surface of each part. A magnetized portion is formed on the inner peripheral surface of the flange portion 8, and the magnetized portion is brought close to and facing the winding portion of the coil of the stator 2.

Next, as shown in FIG. 1, the fan rotor 5 includes a fan main body 17 and a pair of side walls 18 and 18 attached to side ends of the fan main body. A through hole 19 is provided in the through hole 19, the vibration isolator 6 is mounted in the through hole 19, and a pivot shaft is protruded from an axial center portion of the other side wall 18 (not shown).

The vibration isolator 6 is generally made of rubber, plastic, or the like used as a vibration isolator (buffer). As shown in FIGS. 1, 2, 3 and 6, 20
And a truncated cone 21 connected to the disk 20. Then, a long fitting portion 22.
And the short fitting portion 23 is formed. The long projecting piece 10 of the motor rotor 4 is fitted into the long fitting section 22, and the short projecting piece 11 is fitted into the short fitting section 23. That is, as shown in FIGS. 2A and 3A, the long fitting portion 22 includes a first portion 24 into which the first portion 12 of the long projecting piece 10 is fitted, and a long projecting piece 10. And the second part 25 to which the second part 13 is fitted. The short fitting part 23 is, as shown in FIG. 2B and FIG.
It comprises a first part 26 in which the first part 14 of the short piece 11 fits, and a second part 27 in which the second part 15 of the short piece 11 fits.
The long fitting portions 22 .. and the short fitting portions 23 .. are formed alternately and continuously along the circumferential direction, and the ring-shaped hole A is formed.
(See FIG. 6). For this reason, the axially projecting portion 9 composed of the long projecting piece 10 and the short projecting piece 11.
Are fitted into the holes A formed by the long fitting portions 22 and the short fitting portions 23. Then, when fitted, the inner peripheral surface 9a of the axially protruding portion 9 comes into pressure contact with the inner peripheral surface 16 of the hole A. Further, the disc portion 20 has a flange portion 28 having a cover-like opening at the hole A on the motor rotor 4 side.
And the end surface 30 of the axially protruding portion 9 contacts the inner surface 29 of the flange 28. Note that a chamfered portion 33 is formed on the outer surface of the flange portion 28.

Further, a lip portion 34 is formed on the outer peripheral surface of the disk portion 20 of the vibration isolator 6 to press against the outer surface 32 of the main body 7 of the motor rotor 4. This lip portion 34
As shown in FIG. 3, the disk portion 20 is formed of a ring-shaped body that gradually expands from the substantially central portion in the axial direction toward the motor rotor 4 side, and is elastically deformable. That is, in the free state, the expansion angle is set to about 45 degrees, and when the motor rotor 4 is mounted, as shown in FIGS. 7 against the outer surface 32.

The vibration isolator 6 is connected to one side wall 18 of the fan rotor 5 via a flat annular connecting member 36. That is, the inner peripheral portion 37 of the connecting member 36 is embedded in the outer peripheral surface of the disk portion 20 of the vibration isolator 6, and the outer peripheral portion 38 of the connecting member 36 defines the inner peripheral portion of the through hole 19 in the one side wall 18 of the fan rotor 5. Buried in the surface. Thereby, this vibration isolator 6
Are inserted into the through holes 19 and connected to the fan rotor 5. By the way, at the inner and outer peripheral portions 37 and 38 of the connecting body 36,
As shown in FIG. 6, holes 39 are provided at a predetermined pitch along the circumferential direction in order to firmly connect the vibration isolator 6 and the side wall 18. Further, when the vibration isolator 6 is formed, the vibration isolator 6 and the connecting body 36 are integrated by simultaneous integral molding, and the connecting body 36 and the side wall 18 are connected to the side wall 18 and the fan body 17. At the time of molding, the side wall 18 and the connecting body 36 connected to the vibration isolator 6 are integrated by simultaneous molding.

By the way, as shown in FIGS. 2 and 3 and the like, an axial hole 40 is formed in the vibration isolator 6.
Part 40a, second part 40b, third part 40c, and fourth part 40d
The inner diameter of the first part 40a to the fourth part 40d is larger than the outer diameter of the fixed shaft 1. Then, the rotating body 3 is fixed to the fixed shaft 1 on the second portion 40b having an arcuate inner peripheral surface.
A bearing 41 is mounted for rotatably supporting the bearing. As shown in FIGS. 7 and 8, the bearing 41 has a ring body 42 whose outer peripheral surface is formed in an arc shape (the arc shape of the outer peripheral surface is made substantially coincident with the arc shape of the inner peripheral surface of the second portion 40 b). In addition, the outer diameter is substantially the same as the inner diameter of the second portion 40b), and grease (not shown) filled in the ring body 42 is provided. Specifically, the ring body 4
2, the axial hole 43 includes a first portion 43a, a second portion 43b, and a third portion 43c, and the second portion 43a at the center in the axial direction.
Are formed at approximately 120 ° pitches along the circumferential direction. And the first
The inner diameter of the portion 43a is set slightly larger than the outer diameter of the fixed shaft 1, the inner diameter of the second portion 43b is set substantially equal to the outer diameter of the fixed shaft 1, and the third portion 43c is It is set larger than one part 43a. Therefore, if the fixed shaft 1 is inserted into the bearing 41 as shown in FIG.
In other words, when the bearing 41 is externally fitted to the fixed shaft 1, the fixed shaft 1 is fitted to the second portion 43 b, and the bearing 42 becomes rotatable with respect to the fixed shaft 1. The vibration isolator 6 is provided with an air vent hole 45. By the way, the third
A flat annular cover (not shown) is provided on the portion 43c to prevent the grease from scattering in the grease glove portion 44.
Are fitted. In addition, it is set so that it does not flow out to the first portion 43a side by a wall portion for forming the first portion 43a.

Next, a method of assembling the fan device configured as described above will be described. First, the rotating body 3 including the motor rotor 4, the fan rotor 5, and the vibration isolator 6 is assembled, and the fixed shaft 1 and the fixed body 2 are connected to form a fixed member. In this case, the side wall 18 of the fan rotor 5 and the vibration isolator 6
Is integrated by embedding the inner peripheral portion 37 of the connecting body 36, and further, the vibration isolator 6 and the connecting body 36 are integrated by embedding the outer peripheral portion 38 of the connecting body 36. Further, the vibration isolator 6 and the motor rotor 4 are connected by fitting the protrusion 9 in the axial direction of the motor rotor 4 into the hole A of the vibration isolator 6. That is, the motor rotor 4 is sequentially approached to the vibration isolator 6 along the axial direction, and the flange 28 is elastically deformed while the long protrusion 10 of the motor rotor 4 is moved to the long fitting portion 22 of the vibration isolator 6. And the short protrusion 11 of the motor rotor 4 is fitted to the short fitting portion 23 of the vibration isolator 6. Thereby, the motor rotor 4 can be connected to the vibration isolator 6.

Further, the bearing 41 is mounted by fitting it into the vibration isolator 6 to integrate the vibration isolator 6 with the bearing 41. At this time, after connecting the motor rotor 4 to the vibration isolator 6,
Although the bearing 41 is mounted on the vibration isolator 6, the bearing 41 is also attached to the vibration isolator 6.
After attaching the motor rotor 4, the motor rotor 4 may be connected to the vibration isolator 6. Then, the rotating body 3 assembled in this manner is mounted on the fixed shaft 1 on the fixed side. That is, the shaft hole 43 of the bearing 41 attached to the shaft hole 40 of the vibration insulator 6.
By inserting the fixed shaft 1, the rotating body 3 is connected to a fixed side composed of the fixed shaft 1 and the like, and the rotating body 3 is connected to a bearing 41 mounted in the vibration isolator 6. Through
The fixed shaft 1 is rotatably arranged around the axis. In addition,
Since the pivot shaft is provided on the other side wall 18 of the fan rotor 5 as described above, a bearing is mounted on the pivot shaft, and the fan device is connected to the bearing via a bearing support or the like. If it is attached to the indoor unit of the air conditioner to be mounted, both ends of the fan rotor 4 can be supported, and the assembling operation is completed.

According to the above-described embodiment, when the motor rotor 4 is fitted to the vibration isolator 6, the axially projecting portion 9
Since the inner peripheral surface 9a of the flanged portion comes into pressure contact with the inner peripheral surface 16 of the hole A, the axial center of the motor rotor 4 can be surely aligned, and the end surface 30 of the axially projecting portion contacts the inner surface 29 of the flange portion 28. Since the vibration isolator 6 and the motor rotor 4 are in contact with each other, rattling of the vibration isolator 6 and the motor rotor 4 in the axial direction and the radial direction is prevented. Also, the lip 3
4 is in pressure contact with the main body 7 of the motor rotor 4, so that the inside of each of the fitting portions 22 and 23 can be in a negative pressure state, and the adhesion between the vibration isolator 6 and the motor rotor 4 is excellent. further,
The fixed shaft 1 serves as a direct support shaft of the fan rotor 5, and the bearing 41 can be disposed on the axis of the fan rotor 5, so that stable rotation with little influence of cogging torque can be obtained. By the way, in this embodiment, the bearing 4
The arc shape of the first ring body 42 is changed to the second part 40 b of the vibration isolator 6.
And the outer diameter of the ring body 42 is substantially the same as the inner diameter of the second portion 40b, so that the bearing 41 is formed in the axial hole 40 of the vibration isolator 6. Second
The fitting can be surely fitted to the portion 40b in a stable state, and the connection between the bearing 41 and the vibration isolator 6 is stabilized. Also,
Since the vibration isolator 6 serves as a so-called bearing support, and the motor rotor 4 and the fan rotor 5 are connected (joined) via the bearing support, it is possible to reduce the number of parts, thereby improving productivity. It contributes to improvement and cost reduction.

When the vibration isolator 6 is connected to the side wall 18 of the fan rotor 5 as shown in FIG. 3 or the like, the bearing 41 mounted on the vibration isolator 6 is located in a plane including the side wall 18. become. As a result, stress is applied to the vibration isolator 6 that fixes the bearing 41 (stress due to the own weight, eccentricity, and the like of the fan rotor 5).
, And contributes to the improvement of the durability of the vibration isolator 6, and the fan rotor 5 can rotate more stably. Further, the truncated cone 21 of the vibration isolator 6 projects into the fan rotor 5. In other words, one end of the vibration isolator 6 is formed in the fan rotor 5 so as to protrude, and the one end has a conical shape whose diameter gradually decreases toward the inside of the fan rotor 5. Thus, a stable wind can be generated without adversely affecting the flow of the wind generated by the rotation of the fan rotor 6. Furthermore, if the motor rotor 4 is fitted to the vibration isolator 6, that is, if the axially projecting portion 9 of the motor rotor 4 is fitted to the hole A of the vibration isolator 6, the vibration isolator 6 and the motor rotor 4 Are concatenated, in this case,
Since the axially protruding portion 9 has the long protruding portion 10 and the short protruding portion 11, the portion of the long protruding portion 10 protruding from the short protruding portion 11 toward the fan rotor 5 is the same as the vibration isolator 6 The motor rotor 4 serves as a rotation torque transmitting unit that can rotate integrally, and the vibration isolator 6 and the motor rotor 4 reliably rotate integrally.

Although a specific embodiment of the fan device of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. Is possible. For example, the number of the long protruding pieces 10 and the short protruding pieces 11 as the axial center protruding portion 9 can be freely increased or decreased. Further, it may be a projecting pin or the like without being cylindrical. Also, as the bearing 41,
The number of the grease glove portions 44 can be freely increased or decreased, and various types such as ball bearings other than those described in the embodiment can be used. Further, a ring-shaped permanent magnet may be used as the motor rotor 4.

[0028]

According to the fan device of the first aspect, the fan rotor and the motor rotor can be easily connected.
The axis of the motor rotor can be accurately aligned.
In addition, since it also serves as a connecting member for connecting the fan rotor and the motor rotor, the number of components can be reduced, which contributes to cost reduction.

According to the fan device of the second aspect, the axial center of the fan rotor can be accurately adjusted, and the assembling work is easy and the production is excellent.

According to the fan device of the third aspect, the motor fan is stably connected to the vibration isolator, the fan rotor and the motor rotor are stably connected, and the rotational torque is uniform in the rotational direction. , The fan rotor 5 rotates with high accuracy, and it is possible to supply a stable wind and a wind in the wind direction.

According to the fan device of the fourth aspect, positioning in the radial direction can be accurately performed, and more accurate axial alignment can be performed.

According to the fan device of the fifth aspect, the motor rotor and the vibration isolator can be connected in a stable state,
High-precision rotation is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a fan device of the present invention.

FIGS. 2A and 2B are enlarged sectional views of a main part of the fan device before the motor rotor is fitted, respectively.

FIGS. 3A and 3B are enlarged cross-sectional views of main parts of the fan device, showing a fitted state of the motor rotor. FIGS.

FIG. 4 is a side view showing a motor rotor of the fan device.

FIG. 5 is a sectional view showing a motor rotor of the fan device.

FIG. 6 is a side view showing a partial cross section of a vibration isolator of the fan device.

FIG. 7 is an enlarged sectional view of a main part of a bearing of the fan device.

FIG. 8 is a side view of a main part of a bearing of the fan device.

FIG. 9 is a sectional view of a main part of a conventional fan device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed shaft 3 Rotating body 4 Motor rotor 5 Fan rotor 6 Anti-vibration material 9 Projection in axial direction 10 Long protrusion 11 Short protrusion 22 Long fitting portion 23 Short fitting portion 34 Lip portion

Continuation of the front page (72) Inventor Tetsuya Yamashita 1000-2 Oya, Okamoto-cho, Kusatsu-shi, Shiga F-term in the Shiga Works of Daikin Industries, Ltd. (Reference) 3H031 AA02 AA05 BA05 BA07 BA22 3H033 AA02 AA18 BB02 BB09 CC01 CC06 DD13 DD29 EE05 EE06 EE09 3L049 BB07 BD02 5H607 AA04 AA12 BB01 BB14 BB17 CC01 CC05 CC09 DD01 DD02 DD05 FF04 GG00

Claims (5)

[Claims] 1. A fan device comprising a motor rotor (4) and a fan rotor (5), wherein an axial projection (9) is provided at the center of the motor rotor (4), and the fan rotor (5) is provided. 5) A fan wherein a vibration isolator (6) for a bearing is mounted at the center of one side wall, and the axially protruding portion (9) is fitted to the vibration isolator (6). apparatus. 2. A rotating body (3) comprising a motor rotor (4) and a fan rotor (5) connected via a vibration isolator (6).
The fixed shaft (1) is inserted into the shaft hole (19) of the vibration isolator (6), and the rotating body (3) is mounted on the bearing ( The fan device according to claim 1, wherein the fan device is rotatably disposed around the axis of the fixed shaft (41) via the shaft (41). 3. An axially projecting portion (9) of the motor rotor (4) has a long projecting piece (10) and a short projecting piece (11). The long protruding piece (1
0) and the short protruding piece (1).
3. The fan device according to claim 2, further comprising a short fitting portion (1) into which the first fitting is fitted. 4. A long projecting piece (10) and a short projecting piece (1).
The fan device according to claim 3, wherein (1) and (2) are alternately arranged along the circumferential direction. 5. A lip portion (34) for pressing said motor rotor (4) into close contact with said motor rotor (4) is provided on said vibration isolator (6). The fan device according to any one of claims 2 to 4, wherein: