JP7145613B2 - Rotating electric machine, blower, and method for manufacturing rotating electric machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotating electrical machine, a blower, and a method for manufacturing a rotating electrical machine in which bearings can be installed with a simple configuration.

In conventional rotary electric machines and blowers, a rotor in which a magnet and a rotating shaft are integrated has one or more bearings, and the bearings are attached to a frame. Conventional methods for fixing a bearing and a frame include a method of press-fitting the bearing into the frame and a method of inserting an adhesive into the gap between the bearing and the frame to fix the bearing (for example, Patent Documents 1 and 2). reference).

JP 2013-44435 A JP 2014-142071 A

In conventional rotary electric machines and blowers, a groove is provided in the frame in order to fix the bearing and the frame in a state where there is a gap, and an adhesive is poured into the groove to fix the bearing and the frame. . However, when creating grooves in the frame, it is necessary to either perform additional processing to form the grooves in the frame, or create a frame mold to form a frame with a complicated shape that takes into account the grooves. However, there is a problem that the cost is high. In addition, the amount of adhesive used requires an additional amount to fix the bearing and the frame and an amount to be inserted into the groove. There is a problem that much time is required and the cost is high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotating electric machine, a blower, and a manufacturing method of the rotating electric machine, in which bearings can be installed in a simple configuration and at low cost. do.

The rotary electric machine of the present invention is
A rotor installed on a rotating shaft and a stator installed outside the rotor in a radial direction are provided in a frame, and a load part installed on the rotating shaft at a position different from that of the rotor rotates. In a rotating electric machine to drive,
a bearing portion is formed between the rotor and the load portion of the rotating shaft;
The frame includes a first frame portion having a first bottom portion through which the rotating shaft penetrates on the side of the load portion in the axial direction, and a length in the radial direction longer than the length in the radial direction of the first frame portion. and a second frame portion formed axially continuously with the first frame portion and having a second bottom portion on the first frame portion side,
The bearing portion is installed on the first frame portion,
The rotor and the stator are installed on the second frame part,
The bearing portion includes, in the axial direction, a first bearing portion installed on the load portion side, a second bearing portion installed on the rotor side, and the first bearing portion and the second bearing portion. a preloading portion that is installed between and applies preload to the outer ring of the first bearing portion and the outer ring of the second bearing portion;
The first bearing portion is fixed to the first bottom portion of the first frame portion by the preload portion,
The second bearing portion is fixed to the inner wall of the first frame portion via an adhesive layer,
The preload portion is formed by arranging a first washer, a spacer, and a second washer in this order from the load portion side in the axial direction,
the spacer and the first frame portion are formed of members having the same coefficient of linear expansion,
The first washer has a coefficient of friction that is a higher frictional force than the creep force of the first bearing portion, and is formed of a member that presses the outer ring of the first bearing portion,
The second washer is a wave washer that presses the outer ring of the second bearing portion .
In addition, the rotary electric machine of the present invention is
A rotor installed on a rotating shaft and a stator installed outside the rotor in a radial direction are provided in a frame, and a load part installed on the rotating shaft at a position different from that of the rotor rotates. In a rotating electric machine to drive,
a bearing portion is formed between the rotor and the load portion of the rotating shaft;
The frame includes a first frame portion having a first bottom portion through which the rotating shaft penetrates on the side of the load portion in the axial direction, and a length in the radial direction longer than the length in the radial direction of the first frame portion. and a second frame portion formed axially continuously with the first frame portion and having a second bottom portion on the first frame portion side,
The bearing portion is installed on the first frame portion,
The rotor and the stator are installed on the second frame part,
The bearing portion includes, in the axial direction, a first bearing portion installed on the load portion side, a second bearing portion installed on the rotor side, and the first bearing portion and the second bearing portion. a preloading portion that is installed between and applies preload to the outer ring of the first bearing portion and the outer ring of the second bearing portion;
The first bearing portion is fixed to the first bottom portion of the first frame portion by the preload portion,
The second bearing portion is fixed to the inner wall of the first frame portion via an adhesive layer,
an end surface of the second bearing portion on the rotor side in the axial direction is formed on the same plane as the inner surface of the second bottom portion of the second frame portion in the axial direction;
The preload portion is formed by arranging a first washer, a spacer, and a second washer in this order from the load portion side in the axial direction,
the spacer and the first frame portion are formed of members having the same coefficient of linear expansion,
The first washer has a coefficient of friction that is a higher frictional force than the creep force of the first bearing portion, and is formed of a member that presses the outer ring of the first bearing portion,
The second washer is a wave washer that presses the outer ring of the second bearing portion.

Also, the blower of the present invention is
The load portion of the rotary electric machine described above is formed by a wing portion inserted into the rotating shaft.

Further, the method for manufacturing a rotating electric machine of the present invention includes:
In the method for manufacturing a rotating electric machine described above,
The rotor and the bearing portion are installed on the rotating shaft, an adhesive is applied to the outer circumference of the second bearing portion in the radial direction, and the rotating shaft is installed on the second frame portion on which the stator is installed. and the first frame portion, the first bearing portion is fixed to the first bottom portion of the first frame portion by the preload portion, and the adhesive of the second bearing portion is applied to the first frame portion. The adhesive layer is formed and fixed by adhering to the inner wall of the .

According to the rotating electrical machine, the fan, and the method for manufacturing the rotating electrical machine of the present invention,
The bearing can be installed with a simple configuration, resulting in low cost.

1 is a cross-sectional view showing the configuration of a blower according to Embodiment 1 of the present invention; FIG. 2 is an enlarged view showing a configuration of a bearing portion of the rotary electric machine shown in FIG. 1; FIG. 2 is a diagram showing the configuration of a rotating electric machine used in the blower shown in FIG. 1; FIG. 2 is a diagram showing a method of manufacturing the fan shown in FIG. 1; FIG. 2 is a diagram showing a method of manufacturing the fan shown in FIG. 1; FIG. 2 is a diagram showing a method of manufacturing the fan shown in FIG. 1; FIG. 2 is a diagram showing a method of manufacturing the fan shown in FIG. 1; FIG. 2 is a diagram showing a method of manufacturing the fan shown in FIG. 1; FIG. FIG. 4 is a cross-sectional view showing the configuration of a blower according to Embodiment 2 of the present invention; FIG. 10 is an enlarged cross-sectional view showing the configuration of the inner wall of the connecting portion between the first frame portion and the second frame portion of the rotary electric machine shown in FIG. 9; FIG. 4 is a cross-sectional view showing the configuration of another blower according to Embodiment 2 of the present invention; FIG. 12 is an enlarged cross-sectional view showing the configuration of the inner wall of the connecting portion between the first frame portion and the second frame portion of the rotary electric machine shown in FIG. 11; FIG. 4 is a cross-sectional view showing the configuration of another blower according to Embodiment 2 of the present invention; FIG. 14 is an enlarged cross-sectional view showing the configuration of the inner wall of the connecting portion between the first frame portion and the second frame portion of the rotary electric machine shown in FIG. 13; FIG. 11 is a cross-sectional view showing the configuration of a blower according to Embodiment 3 of the present invention; FIG. 16 is an enlarged cross-sectional view showing the configuration of the inner wall of the connecting portion between the first frame portion and the second frame portion of the rotary electric machine shown in FIG. 15; FIG. 11 is a cross-sectional view showing the configuration of a blower according to Embodiment 4 of the present invention; FIG. 11 is a cross-sectional view showing the configuration of a blower according to Embodiment 5 of the present invention; FIG. 19 is an enlarged cross-sectional view showing the configuration of a connecting portion between the first frame portion and the second frame portion of the rotary electric machine shown in FIG. 18; 1 is an enlarged cross-sectional view showing a structure; FIG. FIG. 11 is a cross-sectional view showing the configuration of a blower according to Embodiment 6 of the present invention; FIG. 21 is an enlarged cross-sectional view showing the configuration of the bearing portion of the rotary electric machine of the blower shown in FIG. 20;

Embodiment 1.
Embodiments of the present invention will be described below. FIG. 1 is a diagram showing the configuration of a rotating electric machine and a blower according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view showing the configuration of the bearing portion of the rotary electric machine shown in FIG. FIG. 3 is a diagram showing the configuration of a rotating electrical machine used in the blower shown in FIG. FIG. 3 is a view showing a state seen from below in the axial direction in FIG. 4 to 8 are diagrams showing a method of manufacturing the fan shown in FIG.

In Embodiment 1, blower 100 in which wing portions 8 as load portions are installed in rotary electric machine 1 will be described. Also, the rotary electric machine 1 will be described as an example of a permanent magnet type with four poles and four slots. However, the number of poles and the number of slots of the rotary electric machine 1 can be increased or decreased as appropriate. Further, in the following description, each direction in the rotating electric machine 1 is defined as the axial direction Y, the wing portion 8 side of the rotating electric machine 1 in the axial direction Y is the upper side Y1, and the wing portion 8 side of the rotating electric machine 1 in the axial direction Y is opposite to the direction Y. The side to be turned is shown as the lower side Y2, the radial direction X, the radially X outer side X1, and the radially X inner side X2. Therefore, the directions of the stator 2 and the rotor 3 are the same. Also, other embodiments will be described in the same manner.

In the drawing, a rotating electrical machine 1 includes a stator 2 , a rotor 3 , a rotating shaft 6 and bearings 9 installed within a frame 4 . The rotary electric machine 1 is arranged in the order of the frame 4, the stator 2, and the rotor 3 from the outer side X1 in the radial direction X. As shown in FIG. A vane portion 8 is installed as a load portion at one end of the rotary shaft 6 of the rotary electric machine 1 that is different from the rotor 3 . The bearing portion 9 is formed between the rotor 3 and the vane portion 8 of the rotating shaft 6 .

The stator 2 is fixedly installed on the frame 4 . The stator 2 is formed concentrically with the rotor 3, and an air gap 5 is formed between the stator 2 and the rotor 3 in the radial direction X. As shown in FIG. As shown in FIG. 3, the air gap 5 has a width W1 in the radial direction X of 0.1 mm to 2.5 mm. The stator 2 has an iron core 21 and windings 22 . The iron core 21 is formed by laminating magnetic steel sheets configured in an annular shape in the axial direction Y. As shown in FIG. Any member can be used for the iron core 21 as long as it allows magnetic flux to pass through.

The rotor 3 is fixedly installed on the rotating shaft 6 . The rotor 3 includes a permanent magnet 7 fixed to the rotating shaft 6 at an axial position, and end caps 71 installed at both ends of the permanent magnet 7 in the axial direction Y. As shown in FIG. The permanent magnet 7 is fixed to the rotating shaft 6 by integral molding, adhesive, press-fitting, or the like. Knurling is formed on the outer peripheral surface of the rotating shaft 6, and the strength of the permanent magnet 7 and the rotating shaft 6 is maintained by the engagement of the knurls, but the means for maintaining the strength is limited to the knurling. not a thing The end caps 71 are arranged at both ends of the permanent magnet 7 in the axial direction Y to prevent the permanent magnet 7 from scattering. The material of the end cap 71 is, for example, brass, but is not limited to this.

The wings 8 are fixed to the rotating shaft 6 by adhesive, nut fastening, press-fitting, or the like. Any method may be used as long as it is fixed to the rotating shaft 6, and the air can be moved by the rotation of the vane portion 8. Rotating electric machine 1 and vane portion 8 constitute blower 100 . Air blower 100 may be, for example, a vacuum cleaner.

The frame 4 has a convex shape upwardly Y1 in the axial direction Y and is composed of a first frame portion 41 and a second frame portion 42 . Also, the first frame portion 41 and the second frame portion 42 are formed by integral molding, fixing, or the like. The first frame portion 41 has a first bottom portion 410 through which the rotating shaft 6 penetrates on the feather portion 8 side in the axial direction Y (upper side Y1). The second frame portion 42 is formed such that the length W3 in the radial direction X is longer than the length W2 in the radial direction X of the first frame portion 41, and is continuous with the first frame portion 41 in the axial direction Y, It has a second bottom portion 420 on the first frame portion 41 side. A bearing portion 9 is installed on the first frame portion 41 . The rotor 3 and the stator 2 are installed on the second frame portion 42 .

The bearing portion 9 is arranged in the axial direction Y in the order of the first bearing portion 93, the preload portion 92, and the second bearing portion 94 from the feather portion 8 side (upper side Y1). The first bearing portion 93 and the second bearing portion 94 constitute the bearing 91 of the rotating electric machine 1 . The preload portion 92 applies preload to the first bearing portion 93 and the second bearing portion 94 . The preload portion 92 is composed of a rubber washer 95 as a first washer, a spacer 96, and a wave washer 97 as a second washer. In the preload portion 92, a rubber washer 95, a spacer 96, and a wave washer 97 are arranged in this order from the blade portion 8 side (upper side Y1) in the axial direction Y. As shown in FIG.

An example of forming the first washer with the rubber washer 95, which is a member capable of easily obtaining a coefficient of friction higher than the creep force of the first bearing portion 93, is shown, but the first washer is not limited to this. Instead, other members can be used as long as they have similar functions. The spacer 96 is made of a non-magnetic material such as aluminum. The wave washer 97 is made of stainless steel, for example.

A rubber washer 95, a spacer 96, and a wave washer 97 are each inserted into the rotary shaft 6 with a clearance fit. Also, the inner diameters of the rubber washer 95 and the wave washer 97 are formed larger than the outer diameters of the inner rings of the first bearing portion 93 and the second bearing portion 94 . As a result, the inner rings of the first bearing portion 93 and the second bearing portion 94 are not pressurized by the preload portion 92 and can rotate together with the rotating shaft 6 .

Moreover, since the spacer 96 and the inner wall 411 of the first frame portion 41 are installed with a clearance fit, a clearance is formed. Therefore, it is desirable that the linear expansion coefficient of the first frame portion 41 is the same as that of the spacer 96 . By forming in this way, when the rotary electric machine 1 is installed in a high-temperature environment, it is possible to prevent the gap (clearance) between the first frame portion 41 and the spacer 96 from changing.

The first bearing portion 93 is sandwiched between the first bottom portion 410 of the first frame portion 41 and a rubber washer 95 , and the rubber washer 95 presses the outer ring of the first bearing portion 93 . Therefore, the outer ring of the first bearing portion 93 rotates due to the frictional force of the rubber washer 95 and the force of the first bottom portion 410 of the first frame portion 41 pressing against the first bearing portion 93. fixed not to.

The second bearing portion 94 is formed in contact with the wave washer 97 , and the preload of the wave washer 97 presses the outer ring of the second bearing portion 94 . The second bearing portion 94 is fixed to the inner wall 411 of the first frame portion 41 via an adhesive layer 110 . Any material may be used for the adhesive layer 110 as long as it is an adhesive that can fix the second bearing portion 94 and the inner wall 411 of the first frame portion 41 . The width in the radial direction X of the first bearing portion 93 and the inner wall 411 of the first frame portion 41 is formed with a clearance fit of 3 μm to 100 μm, which is the same as the adhesive layer 110 . The adhesive layer 110 is formed with a width in the radial direction X of 3 μm to 100 μm.

Since the width and clearance fit of the adhesive layer 110 are configured as described above, the accuracy of the coaxiality of the first bearing portion 93 and the second bearing portion 94 is improved, and the rotor 3 is prevented from wobbling and fixed. can. An end surface 941 of the second bearing portion 94 that is not in contact with the wave washer 97 in the axial direction Y is formed flush with the inner surface of the second bottom portion 420 of the second frame portion 42 in the axial direction Y.

Next, a method for manufacturing rotating electric machine 1 and fan 100 of Embodiment 1 configured as described above will be described with reference to FIGS. 1 and 4 to 8. FIG. First, the permanent magnet 7 is formed integrally with the rotary shaft 6, and an end cap 71 is installed (FIG. 4). Next, the second bearing portion 94, the wave washer 97, the spacer 96, the rubber washer 95, and the first bearing portion 93 are inserted into the rotating shaft 6 from the side where the permanent magnet 7 is not arranged (Fig. 5). At this time, the second bearing portion 94 and the first bearing portion 93 are inserted into the rotary shaft 6 with a tolerance of press-fitting. The wave washer 97 also preloads the second bearing 94 . When the state shown in FIG. 5 is reached, the bearing portion 9 has been inserted into the rotating shaft 6 .

Next, the adhesive 10 is applied to the outer peripheral surface of the second bearing portion 94 (FIG. 6). The amount of the adhesive 10 applied to the second bearing portion 94 is such that the space between the second bearing portion 94, the first frame portion 41, and the radial direction X can be filled without any gap in the process described later. It is applied in an amount that does not overflow from. Any amount of adhesive 10 may be applied to the second bearing portion 94 as long as the conditions are satisfied. Also, FIG. 6 shows an example in which the adhesive 10 is applied to the entire outer peripheral surface of the second bearing portion 94, but the present invention is not limited to this, and the adhesive 10 overflows onto the second frame portion 42 side. In order to prevent the adhesive 10 from coming out, it is conceivable to apply the adhesive 10 only to a half portion of the second bearing portion 94 on the wing portion 8 side (upper side Y1) in the axial direction Y. In addition, although the example in which the adhesive 10 is applied to the entire circumference of the outer peripheral surface of the second bearing portion 94 is shown, the present invention is not limited to this. A case of applying to a plurality of locations, for example, four locations is also conceivable.

Next, the stator 2 is installed on the second frame portion 42 . Then, the rotating shaft 6 is inserted in the direction of the arrow A shown in FIG. 7 into the frame 4 on which the stator 2 is installed. Here, the bearing portion 9 is inserted into the first frame portion 41 of the frame 4 . At this time, the first bearing portion 93 is in contact with the first bottom portion 410 of the first frame portion 41 through the rubber washer 95 , and the first bearing portion 93 is held by the rubber washer 95 and the first bottom portion 410 of the first frame portion 41 . The outer ring of the first bearing portion 93 is pressurized and fixed so as not to rotate. Then, the adhesive 10 applied to the second bearing portion 94 is adhered to the inner wall 411 of the first frame portion 41 .

In this case, the end surface 941 of the second bearing portion 94 on the side not in contact with the wave washer 97 in the axial direction Y is formed flush with the inner surface of the second bottom portion 420 of the second frame portion 42 in the axial direction Y. Therefore, even if the adhesive 10 overflows, it can be prevented from leaking to the second bottom portion 420 side of the second frame portion 42 and leaking to the inner ring side of the second bearing portion 94 .

Since curing of the adhesive 10 generally requires a curing time of 1 hour to 12 hours, as shown in FIG. Arrange so that Y2 is on the upper side and cure. Then, the adhesive 10 is cured to form an adhesive layer 110 . Then, the second bearing portion 94 is securely fixed to the inner wall 411 of the first frame portion 41 via the adhesive layer 110, and the rotating electric machine 1 is manufactured. Next, the blade portion 8 is installed on the rotating shaft 6 projecting upward Y1 in the axial direction Y from the first frame portion 41 to manufacture the fan 100 (FIG. 1).

According to the rotating electric machine, the blower, and the manufacturing method of the rotating electric machine of the first embodiment configured as described above, the bearing portion is formed between the rotor of the rotating shaft and the load portion, and the frame is configured to extend in the axial direction. A first frame portion having a first bottom through which the rotating shaft penetrates on the load portion side; and a second frame portion having a second bottom portion on the side of the first frame portion, the first frame portion is provided with a bearing portion, and the second frame portion includes a rotor and a fixed In the axial direction, the bearings are the first bearing installed on the load side, the second bearing installed on the rotor side, and the first bearing and the second bearing. a preloading portion installed between and applying a preload to the first bearing portion and the second bearing portion, the first bearing portion being fixed to the first bottom portion of the first frame portion by the preloading portion; is fixed to the inner wall of the first frame portion via an adhesive layer, the first bearing portion is fixed to the first bottom portion of the first frame portion by the preload portion, and the second bearing portion is fixed by the adhesive layer. Since the portion is fixed to the inner wall of the first frame portion, the bearing portion can be installed with a simple structure, and it is possible to prevent the bearing portion from coming off due to force applied in the axial direction. Therefore, it can be manufactured at low cost.

Moreover, since the adhesive layer is formed only on the second bearing portion on one side, the bearing portion and the first frame portion can be fixed with a small amount of adhesive.
Moreover, since the first bearing portion can be pressurized and fixed to the first bottom portion of the first frame by the preload portion, the shape of the frame can be simplified.

In addition, since the rotor-side end surface of the second bearing portion in the axial direction is formed on the same plane as the inner surface of the second bottom portion of the second frame portion in the axial direction, the second bearing portion is positioned within the first frame portion. It is securely housed, and the function of the bearing of the second bearing portion can be reliably obtained. In addition, when the adhesive leaks to the rotor-side end surface side in the axial direction of the second bearing portion, it can be prevented from leaking to the second bottom portion side of the second frame portion and to the inner ring side of the second bearing portion.

In addition, since the linear expansion coefficient of the first frame portion and the linear expansion coefficient of the spacer are formed to be the same, the gap in the radial direction between the spacer and the first frame portion does not change even if the temperature changes, for example, the temperature rises. Therefore, the bearing is less likely to break.

Moreover, since the first washer is formed of a member having a coefficient of friction that is a higher frictional force than the creep force of the first bearing portion, the first bearing portion can be reliably held on the first frame portion. Furthermore, since the first washer is formed of a rubber washer, the effect can be easily obtained.

The adhesive layer is formed with a radial width of 3 μm to 100 μm, and the first bearing portion and the first frame portion are formed with a clearance fit with a radial width of 3 μm to 100 μm. You can make the most of the sticking power of

In addition, the rotor and the bearing are installed on the rotating shaft, the adhesive is applied to the outer circumference of the second bearing in the radial direction, and the rotating shaft is mounted on the second frame and the first frame on which the stator is installed. The first bearing part is fixed to the first bottom part of the first frame part by the preload part, and the adhesive of the second bearing part is adhered to the inner wall of the first frame part to form an adhesive layer. Since the rotary electric machine is manufactured by fixing, it is possible to assemble easily and simply.

In addition, since the adhesive is applied at a half length position on the load portion side in the axial direction of the second bearing portion, it is possible to prevent the adhesive from overflowing.

In the first embodiment, an example is shown in which the bearing portion is provided with two bearing portions, the first bearing portion and the second bearing portion. It is conceivable that another bearing portion may be installed between the first bearing portion and the second bearing portion in the axial direction.

Embodiment 2.
Although the shape of the inner wall of the connecting portion between the first frame portion 41 and the second frame portion 42 is not particularly shown in the first embodiment, in the second embodiment, the first frame portion 41 and the second frame A characteristic configuration of the inner wall 430 at the connecting portion with the portion 42 will be described.

FIG. 9 is a sectional view showing the configuration of the blower according to Embodiment 2 of the present invention. FIG. 10 is an enlarged cross-sectional view showing the configuration of the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 shown in FIG. FIG. 11 is a sectional view showing the configuration of another blower according to Embodiment 2 of the present invention. FIG. 12 is an enlarged cross-sectional view showing the configuration of the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 shown in FIG. FIG. 13 is a sectional view showing the configuration of another blower according to Embodiment 2 of the present invention. FIG. 14 is an enlarged cross-sectional view showing the configuration of the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 shown in FIG.

In the figure, the same reference numerals are given to the same parts as in the first embodiment, and the description thereof will be omitted. In FIGS. 9 and 10, the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 is formed with a fillet 431 . 11 and 12, the inner wall 430 at the joint between the first frame portion 41 and the second frame portion 42 is formed with a 45-degree chamfered portion 432 where length L1=length L2. 13 and 14, the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 has an angle other than 45 degrees such that length L3>length L4 or length L3<length L4. is formed at the chamfered portion 433 of the . FIG. 14 shows a case where length L3>length L4.

According to the rotating electrical machine 1 of Embodiment 2 configured as described above, as in Embodiment 1, as shown in FIG. , the space between the second bearing portion 94 and the first frame portion 41 in the radial direction X can be filled without gaps, and furthermore, the coating is applied in such an amount that it does not overflow from the gaps. However, as shown in FIG. 7, when the rotating shaft 6 is inserted into the frame 4, even if the adhesive 10 overflows, the inner wall 430 is formed with fillets 431 and chamfers as shown in the second embodiment. If formed by the portion 432 and the chamfered portion 433 , the fillet 431 , the chamfered portion 432 and the chamfered portion 433 can be used as puddles for the overflowing adhesive 10 . By containing the adhesive 10 in the portion, the adhesive 10 does not overflow onto the second bottom portion 420 of the second frame portion 42 .

According to the rotating electric machine, the blower, and the method for manufacturing the rotating electric machine of the second embodiment, which are configured as described above, the same effects as those of the first embodiment are obtained. Since the inner wall of the connecting portion with the frame portion is formed by the fillet or the chamfered portion, it serves as an adhesive liquid reservoir and prevents the adhesive from overflowing to the second bottom portion of the second frame portion. The fillet or chamfered portion can be easily formed, the shape of the frame can be simplified, and the molding cost can be suppressed.

Further, in the second embodiment, the case of length L3>length L4 is shown, and the case is shown where the part plays the role of the adhesive liquid pool. In addition to acting as a pool of adhesive, this location can also play a role in making it more difficult for the second bearing portion to come off from the first frame portion than in the case where length L3>length L4.

Embodiment 3.
In the above-described second embodiment, an example is shown in which the inner wall of the connecting portion between the first frame portion 41 and the second frame portion 42 is formed by one curved surface or inclined surface such as the fillet 431, the chamfered portion 432, and the chamfered portion 433. However, it is not limited to this, and in the third embodiment, the case where the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 is formed by a two-step chamfered portion will be described. do. FIG. 15 is a sectional view showing the configuration of the blower according to Embodiment 3 of the present invention. FIG. 16 is an enlarged cross-sectional view showing the configuration of an inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 of the rotary electric machine shown in FIG.

In the figure, the same reference numerals are assigned to the same parts as in the above-described embodiments, and the description thereof will be omitted. The inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 forms a first chamfered portion 444 forming a first angle θ1 with the inner wall 411 of the first frame portion 41 from the first frame portion 41 side. , a second chamfered portion 445 that is continuous with the first chamfered portion 444 and forms a second angle θ2 with the second bottom portion 420 of the second frame portion 42 .

According to the rotating electric machine 1 of Embodiment 3 configured as described above, as in the above-described embodiments, as shown in FIG. , the space between the second bearing portion 94 and the first frame portion 41 in the radial direction X can be filled without gaps, and furthermore, the coating is applied in such an amount that it does not overflow from the gaps. However, as shown in FIG. 7, when the rotary shaft 6 is inserted into the frame 4, even if the adhesive 10 overflows, the inner wall 430 will be the first chamfered portion as shown in the third embodiment. 444 and the second chamfered portion 445 , the first chamfered portion 444 and the second chamfered portion 445 can be used as a reservoir for the overflowing adhesive 10 . By containing the adhesive 10 in the portion, the adhesive 10 does not overflow onto the second bottom portion 420 of the second frame portion 42 . Also, the first chamfered portion 444 serves to fix the second bearing portion 94 to the first frame portion 41 . Moreover, since the second chamfered portion 445 is provided, the application margin of the adhesive 10 can be increased.

According to the rotating electrical machine, the fan, and the method of manufacturing the rotating electrical machine of Embodiment 3 configured as described above, not only the same effects as those of the above-described embodiments are obtained, but also the first frame portion and the second frame portion The inner wall of the connecting portion with the frame portion is connected from the first frame portion side to the first chamfered portion forming the first angle θ1 with the inner wall of the first frame portion, and the first chamfered portion and the second frame portion. Since the second bottom portion and the second chamfered portion forming the second angle θ2 are provided, the portions of the first chamfered portion and the second chamfered portion serve as reservoirs for a large amount of the adhesive, and the second frame portion of the second frame portion It can prevent the adhesive from overflowing to the bottom. Furthermore, the first chamfer serves to secure the second bearing part to the first frame part. In addition, the second chamfered portion can increase the application margin of the adhesive.

Embodiment 4.
In each of the above-described embodiments, an example in which the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 is formed with a surface such as the fillet 431 is shown, but the present invention is not limited to this. Embodiment 4 describes a case where a stepped portion is formed. FIG. 17 is a sectional view showing the configuration of the blower according to Embodiment 4 of the present invention.

In the figure, the same reference numerals are assigned to the same parts as in the above-described embodiments, and the description thereof will be omitted. A stepped portion 446 is formed on the first frame portion 41 side of the connecting portion between the first frame portion 41 and the second frame portion 42 . The adhesive layer 110 is formed between the inner wall 411 of the first frame portion 41 and the second bearing portion 94 on the wing portion 8 side (upper side Y1) of the stepped portion 446 of the first frame portion 41 . The length L5 of the step portion 446 in the axial direction Y is set so that the relation with the length L6 of the second bearing portion 94 in the axial direction Y is L5<(L6/2). This is to secure the length (L6-L5) of the adhesive layer 110 for fixing the second bearing portion 94 to the inner wall 411 of the first frame portion 41. As shown in FIG.

According to the rotating electrical machine 1 of Embodiment 4 configured as described above, as in the above embodiments, as shown in FIG. , the space between the second bearing portion 94 and the first frame portion 41 in the radial direction X can be filled without gaps, and furthermore, the coating is applied in such an amount that it does not overflow from the gaps. However, as shown in FIG. 7, when the rotating shaft 6 is inserted into the frame 4, even if the adhesive 10 overflows, the stepped portion 446 is formed as shown in the fourth embodiment. , the stepped portion 446 can be used as a pool of the adhesive 10 overflowing. By containing the adhesive 10 in the portion, the adhesive 10 does not overflow onto the second bottom portion 420 of the second frame portion 42 .

According to the rotating electric machine, the blower, and the manufacturing method of the rotating electric machine of the fourth embodiment, which are configured as described above, not only the same effects as those of the above-described embodiments can be obtained, but also the first frame portion and the second frame portion Since a stepped portion is formed on the first frame portion side of the connecting portion with the frame portion, this portion serves as a liquid pool for the adhesive, preventing the adhesive from overflowing to the second bottom portion of the second frame portion. can. In addition, since an adhesive layer is formed between the second bearing portion closer to the load portion than the stepped portion of the first frame portion and the inner wall of the first frame portion, the fixing of the second bearing portion to the first frame portion is prevented. can be ensured.

Embodiment 5.
In each of the above-described embodiments, an example in which the inner wall 430 at the connecting portion between the first frame portion 41 and the second frame portion 42 is formed with a surface such as a fillet 431 or a step portion 446 is shown, but the present invention is limited to this. Instead, in the fifth embodiment, the case where the first recess 447 is formed in the second bottom portion 420 of the second frame portion 42 will be described. FIG. 18 is a sectional view showing the configuration of the blower according to Embodiment 5 of the present invention. FIG. 19 is an enlarged cross-sectional view showing the configuration of the connecting portion between the first frame portion 41 and the second frame portion 42 shown in FIG.

In the figure, the same reference numerals are assigned to the same parts as in the above-described embodiments, and the description thereof will be omitted. The second bottom portion 420 of the second frame portion 42 has a first concave portion 447 that is recessed toward the feather portion 8 in the axial direction Y at a portion that is continuous with the connection portion between the first frame portion 41 and the second frame portion 42 . It is formed. As shown in FIG. 20, in the fifth embodiment, the first concave portions 447 are circular and are formed at four locations. shapes and numbers are formed.

According to the rotating electric machine 1 of Embodiment 5 configured as described above, as in each of the above embodiments, as shown in FIG. , the space between the second bearing portion 94 and the first frame portion 41 in the radial direction X can be filled without gaps, and furthermore, the coating is applied in such an amount that it does not overflow from the gaps. However, as shown in FIG. 7, when the rotating shaft 6 is inserted into the frame 4, even if the adhesive 10 overflows, the first concave portion 447 is formed as shown in the fifth embodiment. The first recess 447 can be used as a reservoir for the adhesive 10 overflowing. By containing the adhesive 10 in the portion, the adhesive 10 does not overflow to other portions of the second bottom portion 420 of the second frame portion 42 .

According to the rotating electrical machine, the fan, and the method of manufacturing the rotating electrical machine of the fifth embodiment, which are configured as described above, not only the same effects as those of the above-described embodiments can be obtained, but also the second In the bottom portion, a first concave portion which is recessed toward the load portion in the axial direction is formed at a portion connected to the connection portion between the first frame portion and the second frame portion, so that the portion is formed as a pool of adhesive. It can play a role and prevent the adhesive from overflowing to other places on the second bottom of the second frame part.

Embodiment 6.
Although the shape of the second bearing portion 94 is not particularly shown in each of the above embodiments, the characteristic configuration of the shape of the second bearing portion 94 will be described in the sixth embodiment. FIG. 20 is a sectional view showing the configuration of the blower according to Embodiment 6 of the present invention. 21 is an enlarged cross-sectional view showing the configuration of the bearing portion of the rotating electric machine of the blower shown in FIG. 20. FIG.

In the figure, the same reference numerals are assigned to the same parts as in the above-described embodiments, and the description thereof will be omitted. The second bearing portion 94 has a second concave portion 942 that is recessed toward the inner side X2 in the radial direction X on the outer periphery in the radial direction X. As shown in FIG. Further, the adhesive layer 110 is formed between the second bearing portion 94 and the inner wall 411 of the first frame portion 41 and also formed inside the second concave portion 942 .

According to the rotating electrical machine 1 of Embodiment 6 configured as described above, it is formed in the same manner as in the above embodiments, and the adhesive layer 110 is formed on the second bearing portion 94 and the inner wall of the first frame portion 41 . 411 and is also formed in the second concave portion 942 of the second bearing portion 94 .

According to the rotating electrical machine, the fan, and the method of manufacturing the rotating electrical machine of Embodiment 6, which are configured as described above, the same effects as those of the above-described embodiments are of course obtained. A second recess recessed inward in the radial direction is formed on the outer circumference of the direction, and the adhesive layer is formed in the second recess. It is possible to prevent the adhesive from overflowing to the second bottom of the part.

In addition, within the scope of the invention, each embodiment can be freely combined, and each embodiment can be appropriately modified or omitted.

1 rotating electric machine, 2 stator, 3 rotor, 4 frame, 5 air gap,
6 rotating shaft 7 permanent magnet 8 blade 9 bearing 10 adhesive 21 iron core
22 winding, 41 first frame part, 42 second frame part, 71 end cap,
91 bearing, 92 preload portion, 93 first bearing portion, 94 second bearing portion,
95 rubber washer, 96 spacer, 97 wave washer, 100 blower,
110 adhesive layer, 410 first bottom, 411 inner wall, 420 second bottom,
430 inner wall, 431 fillet, 432 chamfered portion, 433 chamfered portion,
444 first chamfered portion, 445 second chamfered portion, 446 stepped portion, 447 first recessed portion,
941 end face 942 second concave portion L1 length L2 length L3 length L4 length L5 length L6 length W1 width W2 length W3 length X radial direction
X1 outer side, X2 inner side, Y axial direction, Y1 upper side, Y2 lower side, θ1 first angle,
θ2 Second angle.

Claims (13)

A rotor installed on a rotating shaft and a stator installed outside the rotor in a radial direction are provided in a frame, and a load part installed on the rotating shaft at a position different from that of the rotor rotates. In a rotating electric machine to drive,
a bearing portion is formed between the rotor and the load portion of the rotating shaft;
The frame includes a first frame portion having a first bottom portion through which the rotating shaft penetrates on the side of the load portion in the axial direction, and a length in the radial direction longer than the length in the radial direction of the first frame portion. and a second frame portion formed axially continuously with the first frame portion and having a second bottom portion on the first frame portion side,
The bearing portion is installed on the first frame portion,
The rotor and the stator are installed on the second frame part,
The bearing portion includes, in the axial direction, a first bearing portion installed on the load portion side, a second bearing portion installed on the rotor side, and the first bearing portion and the second bearing portion. a preloading portion that is installed between and applies preload to the outer ring of the first bearing portion and the outer ring of the second bearing portion;
The first bearing portion is fixed to the first bottom portion of the first frame portion by the preload portion,
The second bearing portion is fixed to the inner wall of the first frame portion via an adhesive layer,
The preload portion is formed by arranging a first washer, a spacer, and a second washer in this order from the load portion side in the axial direction,
the spacer and the first frame portion are formed of members having the same coefficient of linear expansion,
The first washer has a coefficient of friction that is a higher frictional force than the creep force of the first bearing portion, and is formed of a member that presses the outer ring of the first bearing portion,
Said second washer is a rotary electric machine formed of a wave washer that pressurizes the outer ring of said second bearing portion . A rotor installed on a rotating shaft and a stator installed outside the rotor in a radial direction are provided in a frame, and a load part installed on the rotating shaft at a position different from that of the rotor rotates. In a rotating electric machine to drive,
a bearing portion is formed between the rotor and the load portion of the rotating shaft;
The frame includes a first frame portion having a first bottom portion through which the rotating shaft penetrates on the side of the load portion in the axial direction, and a length in the radial direction longer than the length in the radial direction of the first frame portion. and a second frame portion formed axially continuously with the first frame portion and having a second bottom portion on the first frame portion side,
The bearing portion is installed on the first frame portion,
The rotor and the stator are installed on the second frame part,
The bearing portion includes, in the axial direction, a first bearing portion installed on the load portion side, a second bearing portion installed on the rotor side, and the first bearing portion and the second bearing portion. a preloading portion that is installed between and applies preload to the outer ring of the first bearing portion and the outer ring of the second bearing portion;
The first bearing portion is fixed to the first bottom portion of the first frame portion by the preload portion,
The second bearing portion is fixed to the inner wall of the first frame portion via an adhesive layer,
an end surface of the second bearing portion on the rotor side in the axial direction is formed on the same plane as the inner surface of the second bottom portion of the second frame portion in the axial direction;
The preload portion is formed by arranging a first washer, a spacer, and a second washer in this order from the load portion side in the axial direction,
the spacer and the first frame portion are formed of members having the same coefficient of linear expansion,
The first washer has a coefficient of friction that is a higher frictional force than the creep force of the first bearing portion, and is formed of a member that presses the outer ring of the first bearing portion,
Said second washer is a rotary electric machine formed of a wave washer that pressurizes the outer ring of said second bearing portion. 3. The rotary electric machine according to claim 1 , wherein said first washer is formed of a rubber washer. The rotor-side end of the inner wall of the first frame portion is arranged at the same position as the inner surface of the second bottom portion or closer to the load portion than the inner surface of the second bottom portion in the axial direction. The rotary electric machine according to any one of claims 1 to 3. The rotary electric machine according to any one of claims 1 to 4, wherein a fillet or a chamfered portion is formed on an inner wall of a connecting portion between the first frame portion and the second frame portion. The inner wall of the connecting portion between the first frame portion and the second frame portion includes, from the first frame portion side, a first chamfered portion forming a first angle θ1 with the inner wall of the first frame portion; The rotary electric machine according to any one of claims 1 to 4, further comprising a second chamfered portion that continues to the one chamfered portion and forms a second angle θ2 with the second bottom portion of the second frame portion. A stepped portion is formed on the first frame portion side of the connecting portion between the first frame portion and the second frame portion,
The adhesive layer is formed between the second bearing portion closer to the load portion than the stepped portion of the first frame portion and the inner wall of the first frame portion. The rotary electric machine according to any one of items 1 and 2. In the second bottom portion of the second frame portion, a first concave portion recessed toward the load portion in the axial direction is formed at a portion continuous with a connection portion between the first frame portion and the second frame portion. The rotary electric machine according to any one of claims 1 to 7. The first bearing portion and the inner wall of the first frame portion are formed by a clearance fit with a radial width of 3 μm to 100 μm,
The rotating electric machine according to any one of claims 1 to 8, wherein the adhesive layer has a radial width of 3 µm to 100 µm. The second bearing portion has a radially outer peripheral surface formed with a second concave portion recessed radially inward,
The rotating electric machine according to any one of claims 1 to 9, wherein the adhesive layer is formed inside the second recess. 11. The fan of claim 1, wherein the load portion of the rotary electric machine according to any one of claims 1 to 10 is formed by blade portions inserted into the rotating shaft. In the method for manufacturing a rotating electric machine according to any one of claims 1 to 11,
The rotor and the bearing are installed on the rotating shaft, an adhesive is applied to the outer periphery of the second bearing, and the rotating shaft is mounted on the second frame and the first frame on which the stator is installed. to fix the first bearing portion to the first bottom portion of the first frame portion by the preload portion, and adhere the adhesive of the second bearing portion to the inner wall of the first frame portion. and forming and fixing as the adhesive layer. 13. The method of manufacturing a rotating electric machine according to claim 12, wherein the application of the adhesive is performed at a half length position on the load portion side in the axial direction of the second bearing portion.

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