Blower

Abstract

A blower (1) is provided with a motor (2) that has a motor shaft (2a), a pin (2b) that passes through the motor shaft (2a) in the radial direction of the motor shaft (2a), anti-vibration components (6) fixed to both ends of a pin (2b) protruding from a motor shaft (2a), and an impeller (4) having a blade part (4a) and a blade shaft part (4b) inserted into the motor shaft (2a). The anti-vibration components (6) have a pair of impeller holding parts that fit onto the blade shaft part (4b), and a connection part (6b) that connects the pair of impeller holding parts fixed to the pin (2b) on both sides of the motor shaft (2a).

Description

blower

[0001] The present disclosure relates to a blower having a vibration isolation component fixed to a pin that penetrates a motor shaft.

[0002] The impeller of the blower is fixed to a motor shaft provided in the drive motor, and the impeller is prevented from spinning idly by a pin that penetrates the motor shaft in the diameter direction of the motor shaft.

[0003] Improving the efficiency of the fan drive motor reduces the motor's power consumption, but can worsen the vibration of the drive motor, resulting in a problem of increased noise due to motor vibration.

[0004] For this reason, in order to solve the problem of noise caused by vibration of the drive motor, the blower may be provided with vibration-damping parts for attenuating the vibration.

[0005] Patent Document 1 describes a structure including a motor and a fan having a fan boss through which the motor shaft passes and a fan fixing rib attached to the small diameter portion at the tip of the shaft. In the structure described in Patent Document 1, an E-ring, which is a fixing part for the fan, is fitted into a circumferential groove of the motor shaft and fixed to the motor shaft, and vibration-proof rubber, which is a vibration-proof part, is provided between the E-ring and the fan boss, so that vibrations transmitted to the shaft are suppressed without being directly transmitted to the fan.

[0006] Patent document 2 describes a blower that includes a fan, a motor, a drive shaft, and a drive transmission shaft, and that suppresses vibrations or abnormal noise caused by collisions between the drive transmission shaft and the fan boss by covering the drive transmission shaft with a drive transmission shaft cap, which is a vibration-damping part.

[0007] JP 10-061593 A JP 2015-052314 A

[0008] However, when the structure described in Patent Document 1 is applied to a blower, although it has a vibration-damping effect against motor vibrations, the vibration-damping components easily come off the motor shaft when attaching or detaching the impeller. Naturally, a user will attach or detach the impeller to or from the motor shaft when cleaning the impeller. If the vibration-damping components come off the motor shaft every time a user cleans the impeller, there is a risk that the vibration-damping components will be lost.

[0009] Furthermore, when the vibration-damping component described in Patent Document 2 is applied to a blower, the vibration-damping component will not come off when the impeller is attached or detached. However, when two drive transmission shaft caps are connected by a single connecting part, a problem occurs in which the position of the vibration-damping component shifts around the drive transmission shaft attached to the motor shaft when the impeller is attached or detached. In other words, in this configuration, it is necessary to take measures to prevent the vibration-damping component from shifting.

[0010] Patent Document 2 also describes an I-shaped drive transmission shaft cap, which is an anti-vibration component with two connecting parts. However, the structure of this anti-vibration component requires a slide mechanism during molding when molding by injection molding, and the pin must be attached to the motor shaft after the anti-vibration component is attached to the motor shaft, which significantly reduces workability.

[0011] For this reason, there is a demand for a technology that can address the problem of misalignment of vibration-isolating parts while ensuring the moldability and ease of installation of the vibration-isolating parts.

[0012] The present disclosure has been made in consideration of the above, and aims to provide a blower that can suppress motor vibration by including vibration-damping parts that can prevent misalignment when attached or detached and are easy to manufacture and install.

[0013] To solve the above-mentioned problems and achieve the object, the blower according to the present disclosure includes a motor having a motor shaft, a pin that penetrates the motor shaft in the diameter direction of the motor shaft, vibration-damping components fixed to both ends of the pin that protrudes from the motor shaft, and an impeller having a blade portion and an impeller shaft portion that is inserted into the motor shaft. The vibration-damping components have a pair of impeller holders that fit onto the impeller shaft portion and connecting portions that connect the pair of impeller holders fixed to the pin on both sides of the motor shaft.

[0014] According to the present disclosure, it is possible to obtain an air blower that can prevent displacement when attached or detached, that is equipped with vibration-damping components that are easy to manufacture and attach, and that can suppress vibration of the motor.

[0015] 1 is a cross-sectional view of a blower according to a first embodiment; FIG. 2 is a cross-sectional view showing an enlarged periphery of a vibration-damping component in the blower according to the first embodiment; FIG. 3 is a perspective view of a first example of a vibration-damping component included in the blower according to the first embodiment, as seen from a first surface side; FIG. 4 is a perspective view of the first example of a vibration-damping component included in the blower according to the first embodiment, as seen from a second surface side; FIG. 5 is a perspective view of the first example of a vibration-damping component included in the blower according to the first embodiment, as seen from a first surface side; 9 is a perspective view showing a state in which the vibration-damping parts attached to the motor shaft of the motor provided in the blower according to the first embodiment are displaced; FIG. 10 is a perspective view showing a state in which the vibration-damping parts attached to the motor shaft of the motor provided in the blower according to the first embodiment are displaced; FIG. 11 is a perspective view showing a state in which the vibration-damping parts attached to the motor shaft of the motor provided in the blower according to the first embodiment are returned to their proper positions;

[0016] Hereinafter, a blower according to an embodiment will be described in detail with reference to the drawings.

[0017] First Embodiment. Figure 1 is a cross-sectional view of a blower according to a first embodiment. Note that in Figure 1, some hatching has been omitted for clarity, and the side view of the vibration-isolating component 6 itself is shown. Figure 2 is a cross-sectional view showing an enlarged view of the periphery of the vibration-isolating component in the blower according to the first embodiment. Note that Figure 2 is a vertical cross-sectional view taken along a through-hole central axis 6g, which is the central axis of a rotating shaft 3 and a vibration-isolating portion through-hole 6c, as described below, and therefore does not show a connecting portion 6b, as described below.

[0018] The blower 1 according to the first embodiment includes a motor 2 having a motor shaft 2a, an impeller 4 fixed to the motor shaft 2a, and vibration-damping components 6. The blower 1 also includes components that are provided in a typical blower, such as a bell mouth that covers the impeller 4 and a scroll casing, but these components are not shown or described here.

[0019] A pin 2b is attached to the motor shaft 2a, penetrating the motor shaft 2a in the diameter direction of the motor shaft 2a, which is a direction perpendicular to the axial direction of the motor shaft 2a. That is, a shaft through-hole 2a1 is formed in the motor shaft 2a, which is a through-hole penetrating the motor shaft 2a in the diameter direction of the motor shaft 2a. The pin 2b is inserted into the shaft through-hole 2a1 and attached in a state where it penetrates the motor shaft 2a in the diameter direction of the motor shaft 2a.

[0020] The impeller 4 includes a blade portion 4a provided with a plurality of blades 4c, and a blade shaft portion 4b extending from the blade portion 4a and inserted into the motor shaft 2a.

[0021] The impeller shaft 4b has a cylindrical shape, and an impeller through-hole 4d, through which the motor shaft 2a is inserted, is formed in the cylindrical shaft portion. The impeller through-hole 4d is also formed in a part of the impeller 4a, extending from the impeller shaft 4b. The shape of the impeller shaft 4b is not limited to a cylindrical shape, and may be any cylindrical shape with the impeller through-hole 4d formed therein.

[0022] The impeller 4 is fixed to the motor shaft 2a using a nut 5. The tip region on the free end side of the motor shaft 2a is male-threaded. That is, with the motor shaft 2a passing through the impeller through-hole 4d, the nut 5 is attached to the motor shaft 2a protruding from the impeller through-hole 4d, and the impeller 4 is screw-fixed to the motor shaft 2a using the nut 5. Note that the method for fixing the impeller 4 to the motor shaft 2a is not limited.

[0023] The impeller 4 rotates around the axis of the motor shaft 2a of the motor 2 as the rotation axis 3. That is, the impeller 4 rotates around the rotation axis 3 of the impeller 4, which is coaxial with the axis of the motor shaft 2a of the motor 2. The impeller 4 is fixed to the motor shaft 2a via a pin 2b that passes through the motor shaft 2a and a vibration-proof part 6 that is attached to the pin 2b.

[0024] The vibration-damping parts 6 are attached to the pins 2b that penetrate the motor shaft 2a and dampen the vibrations of the motor 2 by damping the vibrations of the motor shaft 2a, thereby reducing noise caused by the vibrations of the motor 2. The vibration-damping parts 6 are fixed to both ends of the pins 2b that protrude from the motor shaft 2a, sandwiching the motor shaft 2a between them. Examples of materials for the vibration-damping parts 6 include elastomer, resin, and rubber. Examples of rubber materials used for the vibration-damping parts 6 include butyl rubber, silicone rubber, and acrylonitrile butadiene rubber.

[0025] FIG. 3 is a perspective view of a first example of a vibration-damping component included in the blower according to the first embodiment, as viewed from the first surface side. FIG. 4 is a perspective view of the first example of a vibration-damping component included in the blower according to the first embodiment, as viewed from the second surface side. The first surface 6d of the vibration-damping component 61 according to the first example is a surface of the connecting portion 6b that faces the impeller 4 in the axial direction of the motor shaft 2a when the vibration-damping component 61 is attached to the motor shaft 2a of the motor 2. The second surface 6e of the vibration-damping component 61 according to the first example is a surface that faces away from the impeller 4 in the axial direction of the motor shaft 2a when the vibration-damping component 61 is attached to the motor shaft 2a of the motor 2. In the pair of vibration-damping portions 6a, the first surface 6d and the second surface 6e, which are a pair of back-to-back surfaces, are parallel. That is, the first surface 6d and the second surface 6e face in opposite directions and are parallel to each other in-plane directions.

[0026] The vibration-damping component 61 according to the first example includes a pair of vibration-damping portions 6 a and a pair of connecting portions 6 b connecting the pair of vibration-damping portions 6 a. In the vibration-damping component 61, the area surrounded by the pair of vibration-damping portions 6 a and the pair of connecting portions 6 b is an insertion hole 6 i through which the motor shaft 2 a is inserted.

[0027] The shape of the surfaces of the pair of connecting portions 6b that face the motor shaft 2a of the motor 2 is shaped to follow the outer circumferential shape of the motor shaft 2a of the motor 2. That is, the surfaces of the connecting portions 6b that face the motor shaft 2a have an arc shape. The pair of vibration-isolating portions 6a are connected to the free ends of the arc shape of the connecting portions 6b.

[0028] Furthermore, the cross section of the connecting portion 6b in a direction perpendicular to the longitudinal direction of the connecting portion 6b is rectangular. By making the cross section of the connecting portion 6b in a direction perpendicular to the longitudinal direction of the connecting portion 6b rectangular, moldability when manufacturing the vibration-damping component 61 by injection molding is improved.

[0029] Note that the cross-sectional shape of the connecting portion 6b in a direction perpendicular to the longitudinal direction of the connecting portion 6b may be axially symmetric, non-axisymmetric, or rotationally non-symmetric, with the center of the cross-sectional shape of the connecting portion 6b in the direction perpendicular to the longitudinal direction of the connecting portion 6b as the axis, from the viewpoint of the strength of the vibration-damping component 61 or the ease of attaching the vibration-damping component 61 to the motor 2. Here, an axisymmetric shape is, for example, a circle. A non-rotationally symmetric shape is, for example, a semicircle. The cross-sectional dimensions of the connecting portion 6b in the direction perpendicular to the longitudinal direction of the connecting portion 6b may be appropriately set taking into consideration the formability of the vibration-damping component 61, the strength of the vibration-damping component 61, the ease of attaching the vibration-damping component 61 to the motor 2, and the like.

[0030] The vibration-damping component 61 according to the first example connects a pair of vibration-damping parts 6a together with a pair of connecting parts 6b, i.e., two vibration-damping parts 6a are connected together with two connecting parts 6b, so that the vibration-damping component 61 attached to the pin 2b does not shift position when the impeller 4 is attached or detached from the motor shaft 2a to clean the impeller 4. As a result, the blower 1 equipped with the vibration-damping component 61 can stably suppress vibrations propagating from the motor shaft 2a to the impeller 4 even after product cleaning of the impeller 4.

[0031] 3 and 4, vibration-damping component 61 does not require a slide mechanism when injection molding the component using a mold. This has the advantage that vibration-damping component 61 can be manufactured inexpensively. The fact that a slide mechanism is not required when injection molding the component using a mold differs from the vibration-damping component shown in, for example, Figure 7 of Patent Document 2, and can be said to be one of the features of vibration-damping component 61.

[0032] The pair of vibration-damping parts 6a are a pair of impeller holders that fit into recesses 4e (described later) of the impeller shaft 4b of the impeller 4. The pair of vibration-damping parts 6a are attached to the pins 2b that pass through the motor shaft 2a, and dampen the vibrations of the motor 2 by damping the vibrations of the motor shaft 2a, thereby reducing noise caused by the vibrations of the motor 2.

[0033] Each of the pair of vibration-isolating portions 6a is formed with a vibration-isolating portion through-hole 6c, which is a through-hole into which a pin 2b passing through the motor shaft 2a of the motor 2 is fitted. The inner diameter of the vibration-isolating portion through-hole 6c is smaller than the diameter of the pin 2b. Specifically, the inner diameter of the vibration-isolating portion through-hole 6c is preferably 60% to 80% of the diameter of the pin 2b.

[0034] If the inner diameter of the vibration-isolating through-hole 6c is less than 60% of the diameter of the pin 2b, the inner diameter of the vibration-isolating through-hole 6c is too small, making it difficult to attach the vibration-isolating component 61 to the pin 2b. If the inner diameter of the vibration-isolating through-hole 6c is greater than 80% of the diameter of the pin 2b, the vibration-isolating component 61 will be more likely to come off the pin 2b.

[0035] Therefore, by making the inner diameter of the vibration-damping part through hole 6c 60% or more and 80% or less of the diameter of the pin 2b, the vibration-damping part 61 can be easily attached to the pin 2b, and the vibration-damping part 61 can be made less likely to come off the pin 2b.

[0036] Even if the inner diameter of the vibration-isolating through-hole 6c is equal to or greater than the diameter of the pin 2b, the vibration-isolating component 61 can still provide the vibration-isolating effect of attenuating the vibration of the motor 2. The inner diameter of the vibration-isolating through-hole 6c can be changed as appropriate to suit the various conditions of the blower 1.

[0037] Each of the pair of vibration-isolating portions 6a has a convex shape that convex outward in the arrangement direction of the vibration-isolating portions 6a, in which the pair of vibration-isolating portions 6a are arranged with the pair of connecting portions 6b between them. That is, the vibration-isolating portions 6a have a convex shape in which the outer portions in the arrangement direction of the vibration-isolating portions 6a are convex outward. The arrangement direction of the vibration-isolating portions 6a corresponds to the longitudinal direction of the pins 2b. The outer side is the side that faces the blade shaft portion 4b when the vibration-isolating component 61 is attached to the motor shaft 2a, and is the opposite side to the side where the vibration-isolating portion 6a is connected to the pair of connecting portions 6b in the arrangement direction of the vibration-isolating portions 6a in the in-plane direction of the first surface 6d of the vibration-isolating component 61 in FIG. 3 . The outer side can be said to be the non-connected side where the vibration-isolating portion 6a is not connected to the pair of connecting portions 6b in the arrangement direction of the vibration-isolating portions 6a.

[0038] Each of the pair of vibration-damping parts 6a has a semi-elliptical cylindrical shape. That is, the outer shape of each of the pair of vibration-damping parts 6a in the in-plane direction of the first surface 6d of the vibration-damping part 6a in Fig. 3 has a shape obtained by dividing the elliptical cylindrical shape into two equal parts in the long axis direction of the ellipse. By making the shape of the vibration-damping part 6a semi-elliptical cylindrical, when the pin 2b penetrating the motor shaft 2a is inserted into the vibration-damping part through-hole 6c of the vibration-damping part 6a and then the vibration-damping part 6a is fitted into the recess 4e of the blade shaft part 4b of the impeller 4, the vibration-damping part 6a can be easily fitted into the recess 4e of the blade shaft part 4b.

[0039] Fig. 5 is a perspective view showing a state before the impeller is attached to the first example vibration-damping component included in the blower according to the first embodiment. Fig. 6 is a perspective view showing a state after the impeller is attached to the first example vibration-damping component included in the blower according to the first embodiment. As shown in Figs. 5 and 6 , a recess 4e is formed in the tip portion on the free end side of the blade shaft portion 4b of the impeller 4. The tip portion on the free end side of the blade shaft portion 4b of the impeller 4 is the tip portion of the blade shaft portion 4b of the impeller 4 that faces the vibration-damping portion 6a of the vibration-damping component 61. The free end side of the blade shaft portion 4b of the impeller 4 is the side that faces the vibration-damping portion 6a of the vibration-damping component 61 in the blower 1.

[0040] The recesses 4e are formed at two locations symmetrical about the cylindrical axis of the impeller 4 at the tip of the free end of the impeller 4. The recesses 4e are formed at positions corresponding to the vibration-damping portions 6a of the vibration-damping component 61 when the vibration-damping component 61 and the impeller 4 are fixed together.

[0041] 6 , the vibration-damping part 6a of the vibration-damping part 61 fits into the recess 4e of the blade shaft part 4b of the impeller 4, thereby fixing the vibration-damping part 61 to the impeller 4. The recess 4e can be considered to be a fitting recess that is a fitting part on the impeller 4 side in the fitting structure between the impeller 4 and the vibration-damping part 61. On the other hand, the convex part of the vibration-damping part 6a of the vibration-damping part 61 can be considered to be a fitting convex part that is a fitting part on the vibration-damping part 61 side in the fitting structure between the impeller 4 and the vibration-damping part 61.

[0042] The concave shape of the recess 4e may be U-shaped or V-shaped, and is not particularly limited as long as it is a shape that can reliably fit into the vibration-damping portion 6a of the vibration-damping component 61, but it is preferable that the shape be a shape that follows the shape of the convex portion of the vibration-damping portion 6a of the vibration-damping component 61, i.e., a shape that matches the convex shape of the vibration-damping portion 6a of the vibration-damping component 61. By making the concave shape of the recess 4e a shape that matches the convex shape of the vibration-damping portion 6a of the vibration-damping component 61, the blade shaft portion 4b of the impeller 4 can be easily fitted into the vibration-damping portion 6a of the vibration-damping component 61, and the impeller 4 and the vibration-damping component 61 can be reliably fixed together.

[0043] Furthermore, the shape and dimensions of the connecting portion 6b of the vibration-damping component 61 and the shape and dimensions of the tip portion on the free end side of the blade shaft portion 4b of the impeller 4 are such that when the concave portion 4e of the blade shaft portion 4b of the impeller 4 is fitted into the convex portion of the vibration-damping component 6a of the vibration-damping component 61, the connecting portion 6b of the vibration-damping component 61 does not interfere with the tip portion on the free end side of the blade shaft portion 4b of the impeller 4. This prevents the connecting portion 6b of the vibration-damping component 61 from breaking due to interference between the connecting portion 6b of the vibration-damping component 61 and the tip portion on the free end side of the blade shaft portion 4b of the impeller 4 in the blower 1.

[0044] Each of the pair of vibration-damping parts 6a may be shaped like a rectangular pillar or a semi-cylindrical pillar. When the vibration-damping parts 6a have a semi-cylindrical shape, it is easier to fit the vibration-damping parts 6a into the recesses 4e of the blade shaft 4b of the impeller 4 than when the vibration-damping parts 6a have a rectangular pillar shape, making it easier to attach the impeller 4 to the vibration-damping parts 6a. When the vibration-damping parts 6a have a semi-elliptical cylindrical shape, it is easier to fit the vibration-damping parts 6a into the recesses 4e of the blade shaft 4b of the impeller 4 than when the vibration-damping parts 6a have a semi-cylindrical shape, making it easier to attach the impeller 4 to the vibration-damping parts 6a.

[0045] Each of the pair of vibration-isolating portions 6a is connected to the connecting portion 6b in an end region on the first surface 6d side and on the center side of the vibration-isolating component 6 in the arrangement direction of the vibration-isolating portions 6a.

[0046] 7 is a perspective view of a second example of an anti-vibration component included in the fan according to the first embodiment, as viewed from the first surface side. FIG. 8 is a perspective view of the second example of an anti-vibration component included in the fan according to the first embodiment, as viewed from the second surface side. Similar to the first example, the first surface 6d of the anti-vibration component 62 according to the second example is the surface of the connecting portion 6b that faces the impeller 4 in the axial direction of the motor shaft 2a when the anti-vibration component 62 is attached to the motor shaft 2a of the motor 2. Similar to the first example, the second surface 6e of the anti-vibration component 62 according to the second example is the surface that faces away from the impeller 4 in the axial direction of the motor shaft 2a when the anti-vibration component 62 is attached to the motor shaft 2a of the motor 2. In the pair of anti-vibration components 6a, the first surface 6d and the second surface 6e, which are a pair of back-to-back surfaces, are parallel.

[0047] The vibration-damping component 62 according to the second example differs from the vibration-damping component 61 according to the first example in that the second surface 6e side of the vibration-damping portion through-hole 6c of the vibration-damping component 62 is blocked by a protrusion 6f. That is, the vibration-damping component 62 according to the second example has a protrusion 6f on the surface that does not face the motor shaft 2a when the vibration-damping component 62 is attached to the motor shaft 2a of the motor 2.

[0048] The protrusion 6f has, for example, a cylindrical shape. The diameter of the cylindrical shape of the protrusion 6f is larger than the diameter of the vibration-isolating part through-hole 6c. Here, the central axis of the vibration-isolating part through-hole 6c is defined as the through-hole central axis 6g. Furthermore, the central axis of the protrusion 6f is defined as the protrusion central axis 6h. Here, the position of the through-hole central axis 6g and the position of the protrusion central axis 6h are coincident. In other words, the through-hole central axis 6g and the protrusion central axis 6h are coaxial.

[0049] The protrusion 6f allows the user of the blower 1 to easily adjust the position of the vibration-damping part 62 by pressing the protrusion 6f when the position of the vibration-damping part 62 attached to the motor shaft 2a becomes misaligned.

[0050] Similar to vibration-damping component 61, vibration-damping component 62 according to the second example connects a pair of vibration-damping parts 6a together using a pair of connecting parts 6b, i.e., two connecting parts 6b connect two vibration-damping parts 6a together, so that vibration-damping component 62 attached to pin 2b does not shift position when impeller 4 is attached or detached from motor shaft 2a to clean impeller 4. As a result, blower 1 equipped with vibration-damping component 62 can stably suppress vibrations propagating from motor shaft 2a to impeller 4 even after product cleaning of impeller 4.

[0051] 7 and 8, similar to vibration-damping component 61, vibration-damping component 62 does not require a slide mechanism when molding vibration-damping component 62 by injection molding using a mold. Therefore, vibration-damping component 62 has the advantage of being inexpensive to manufacture.

[0052] Fig. 9 is a perspective view showing a state in which an anti-vibration component provided in a blower according to embodiment 1 is attached to a motor shaft of a motor. Fig. 10 is a view of Fig. 9 as seen from the direction of the central axis of the protrusion, which is the central axis of the protrusion. In Fig. 9, a pin 2b penetrates a motor shaft 2a of a motor 2, and an anti-vibration component 62 is attached to the pin 2b. As shown in Figs. 9 and 10, in the anti-vibration component 62, a pair of connecting portions 6b connecting a pair of anti-vibration portions 6a of the anti-vibration component 62 hold the anti-vibration portions 6a on both sides of the axis of the motor shaft 2a.

[0053] Fig. 11 is an image diagram showing a state in which the position of the vibration-damping part attached to the motor shaft of the motor included in the blower according to embodiment 1 has shifted. Fig. 12 is an image diagram showing a state in which the position of the vibration-damping part attached to the motor shaft of the motor included in the blower according to embodiment 1 has been returned to the correct position. If the position of the vibration-damping part 62 shifts during product cleaning of the blower 1, the user can return the vibration-damping part 62 to the correct position by pressing the protrusion 6f with a finger.

[0054] For example, as shown in Fig. 11, if the position of the vibration-damping part 62 attached to the motor shaft 2a of the motor 2 becomes misaligned, the user can simply press the protrusion 6f with their finger in the direction indicated by the arrow in Fig. 11. This allows the vibration-damping part 62 attached to the motor shaft 2a to be returned to the correct position, as shown in Fig. 12. As described above, the position of the through-hole central axis 6g and the position of the protrusion central axis 6h coincide, making it easier for the user to align the position of the protrusion 6f with the position of the pin 2b, and allowing the position of the vibration-damping part 62 to be easily adjusted.

[0055] FIG. 13 is a first diagram showing the steps of a method for mounting an anti-vibration component included in the fan of the first embodiment to a motor. FIG. 14 is a second diagram showing the steps of a method for mounting an anti-vibration component included in the fan of the first embodiment to a motor. FIG. 15 is a third diagram showing the steps of a method for mounting an anti-vibration component included in the fan of the first embodiment to a motor. FIG. 16 is a fourth diagram showing the steps of a method for mounting an anti-vibration component included in the fan of the first embodiment to a motor. FIGS. 13 to 16 show a method for mounting an anti-vibration component 62. When mounting the anti-vibration component 62 on the motor shaft 2 a of the motor 2, the mounting can be performed in four steps, steps 1 to 4. Here, a case where the motor shaft 2 a is arranged along the vertical direction will be described.

[0056] 13, the vibration-isolating part 62 is inserted onto the motor shaft 2a up to a position directly above the pin 2b in the axial direction of the motor shaft 2a. The motor shaft 2a is inserted into the insertion hole 6i of the vibration-isolating part 62.

[0057] Next, in step 2, as shown in Figure 14, the vibration-isolating component 62 is stretched in the direction of arrangement of the vibration-isolating portion 6a and moved below the pin 2b in the axial direction of the motor shaft 2a. By making the vibration-isolating component 62 out of a stretchable material such as rubber, it is possible to stretch the vibration-isolating component 62.

[0058] Next, in step 3, as shown in FIG. 15, the pair of vibration-isolating parts 6a are bent upward.

[0059] Next, in step 4, as shown in Figure 16, a pair of vibration-isolating parts 6a are fitted onto the pins 2b protruding from both sides of the motor shaft 2a. That is, the pins 2b are inserted into the vibration-isolating part through-holes 6c of the pair of vibration-isolating parts 6a. Through the above steps, the vibration-isolating part 62 is attached to the motor shaft 2a of the motor 2. The method for attaching the vibration-isolating part 61 to the motor shaft 2a of the motor 2 is the same as above.

[0060] As described above, the vibration-damping component 62 can be easily attached to the motor shaft 2a of the motor 2. Furthermore, even if the user accidentally removes the vibration-damping component 62 from the pin 2b, the vibration-damping component 62 will not be lost because it is located between the pin 2b and the main body of the motor 2.

[0061] The above-described method of mounting the vibration-isolating components 62 is one example of a method of mounting the vibration-isolating components 6. Therefore, the method of mounting the vibration-isolating components 6 may be appropriately determined in consideration of workability.

[0062] Fig. 17 is a cross-sectional view of another fan according to the first embodiment. As with Fig. 1, some hatching has been omitted in Fig. 17 for clarity, and the side of the vibration-damping component 6 itself is shown. Fan 11, another fan according to the first embodiment, includes a motor 2 having a motor shaft 2a, an impeller 41 fixed to the motor shaft 2a, and a vibration-damping component 6. Note that fan 11 also includes components that are provided in a typical fan, such as a bell mouth and a scroll casing that cover the impeller 41, but these are not shown or described here.

[0063] The fan 11 uses an impeller 41 instead of the impeller 4 according to the first embodiment. That is, the type of impeller used in the fan 11 is different from that in the fan 1. The impeller 4 of the fan 1 shown in Fig. 1 is an impeller generally called an axial flow type or a propeller type. The impeller 41 of the fan 11 shown in Fig. 17 is a centrifugal type impeller.

[0064] The impeller 41 is fixed to the motor shaft 2a using a nut 5. The method of fixing the impeller 41 to the motor shaft 2a is not limited. The impeller 41 rotates around the axis of the motor shaft 2a of the motor 2 as the rotation axis 3. In other words, the impeller 41 rotates around the motor shaft 2a of the motor 2 as the axis. The impeller 41 is fixed to the motor 2 via a vibration-isolating part 6 attached to a pin 2b that passes through the motor shaft 2a.

[0065] By including the vibration-isolating component 6, the blower 11 can obtain the same effects as the above-described blower 1. That is, the type of impeller 4 used in the blower to which the vibration-isolating component 6 is applied does not matter.

[0066] As described above, in the blower 1 of embodiment 1, the vibration-damping part 6 is attached to the pin 2b that passes through the motor shaft 2a, and damps the vibration of the motor 2 by damping the vibration of the motor shaft 2a, thereby reducing the noise caused by the vibration of the motor 2.

[0067] Furthermore, because the vibration-damping component 6 connects a pair of vibration-damping parts 6a together with a pair of connecting parts 6b, i.e., because two vibration-damping parts 6a are connected together with two connecting parts 6b, the vibration-damping component 6 attached to the pin 2b does not shift position when the impeller 4 is attached or detached from the motor shaft 2a when cleaning the impeller 4, or when the user touches the vibration-damping component 6. As a result, the blower 1 equipped with the vibration-damping component 6 can stably suppress vibrations propagating from the motor shaft 2a to the impeller 4 even after product cleaning of the impeller 4.

[0068] Furthermore, the vibration-proof component 6 does not require a slide mechanism when molding the vibration-proof component 6 by injection molding using a mold, and can be manufactured inexpensively.

[0069] Furthermore, the vibration-isolating component 6 can be attached simply by inserting the vibration-isolating portion 6a onto the pin 2b after passing it over the motor shaft 2a, which provides excellent installation workability.

[0070] Therefore, the blower 1 according to the first embodiment is provided with an anti-vibration component 6 that can prevent misalignment during attachment and detachment and is easy to manufacture and attach, and is capable of suppressing vibration of the motor 2. With the blower 1, when the impeller 4 is attached or detached from the motor shaft 2a, the anti-vibration component 6 attached to the pin 2b of the motor shaft 2a does not become misaligned, and vibrations propagating from the motor 2 to the impeller 4 can be stably suppressed even after the impeller 4 is cleaned.

[0071] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies, and parts of the configurations may be omitted or modified without departing from the spirit of the invention.

[0072] 1, 11 blower, 2 motor, 2a motor shaft, 2a1 shaft through-hole, 2b pin, 3 rotating shaft, 4, 41 impeller, 4a blade portion, 4b blade shaft portion, 4c blade, 4d impeller through-hole, 4e recess, 5 nut, 6, 61, 62 vibration-isolating part, 6a vibration-isolating portion, 6b connecting portion, 6c vibration-isolating portion through-hole, 6d first surface, 6e second surface, 6f protrusion, 6g through-hole central axis, 6h protrusion central axis, 6i insertion hole.

Claims

1. a motor having a motor shaft; a pin passing through the motor shaft in a diametrical direction of the motor shaft; anti-vibration components fixed to both ends of the pin protruding from the motor shaft; an impeller having a blade portion and a blade shaft portion that is inserted into the motor shaft; Equipped with the vibration-proof component has a pair of impeller holding parts that fit into the impeller shaft part, and a connecting part that connects the pair of impeller holding parts fixed to the pin on both sides of the motor shaft, The impeller holder has a convex portion that is convex on a side facing the impeller shaft portion, the impeller shaft portion has a recess at an end portion facing the impeller holding portion, the recess being fitted into the protruding portion; A blower characterized by:

2. The convex portion has a semi-cylindrical shape; The blower according to claim 1 .

3. The convex portion has a semi-elliptical cylindrical shape. The blower according to claim 1 .

4. the impeller holder has a protrusion on a surface thereof that does not face the motor shaft; The blower according to claim 1 .

5. The impeller holding portion has a vibration-proof through hole formed therein, the vibration-proof through hole being a through hole into which the pin is fitted, The through-hole central axis, which is the central axis of the vibration-proof through-hole, and the protrusion central axis, which is the central axis of the protrusion, are coaxial with each other; 5. The blower according to claim 4.

6. The inner diameter of the vibration-proof through hole is smaller than the diameter of the pin; The blower according to claim 5 .

7. The inner diameter of the vibration-proof through hole is 60% or more and 80% or less of the diameter of the pin; The blower according to claim 6 .

8. A cross-sectional shape of the connecting portion in a direction perpendicular to a longitudinal direction of the connecting portion has an axially symmetric shape with a center of the cross-sectional shape as an axis; The blower according to claim 1 .

9. A cross-sectional shape of the connecting portion in a direction perpendicular to a longitudinal direction of the connecting portion has a non-axisymmetric shape with respect to an axis of the cross-sectional shape; The blower according to claim 1 .

10. A cross-sectional shape of the connecting portion in a direction perpendicular to a longitudinal direction of the connecting portion has a rotationally asymmetric shape with a center of the cross-sectional shape as an axis; The blower according to claim 1 .

11. A cross-sectional shape of the connecting portion in a direction perpendicular to a longitudinal direction of the connecting portion has a quadrangle shape with a center of the cross-sectional shape as an axis; The blower according to claim 1 .

12. an end portion of the impeller shaft portion facing the impeller holding portion does not interfere with the connecting portion; A blower according to any one of claims 1 to 11, characterized in that