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

[Technical Field]

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

[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 that includes 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 part for fixing the fan, is fitted into a circumferential groove in 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 transmitted directly 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. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 10-061593 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-052314 Summary of the Invention [Problem to be solved by the invention]

[0008] However, when the structure described in Patent Document 1 is applied to a blower, although it has a vibration-damping effect against motor vibration, the vibration-damping parts 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 parts come off the motor shaft every time a user cleans the impeller, there is a risk that the vibration-damping parts 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 a vibration-damping part with two connecting parts. However, the structure of this vibration-damping part requires a slide mechanism during molding when molding by injection molding, and also requires that a pin be attached to the motor shaft after the vibration-damping part 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. [Means for solving the problem]

[0013] In order 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 penetrating the motor shaft in the diameter direction of the motor shaft, vibration-proof components fixed to both ends of the pin protruding from the motor shaft, an impeller having a blade portion and a blade shaft portion inserted into the motor shaft, of The vibration-proof component has a pair of impeller holders that fit onto the impeller shaft portion, and connecting portions that connect the pair of impeller holders that are fixed to the pins on both sides of the motor shaft. The impeller holding portion has a convex portion on the side facing the impeller shaft portion, and the impeller shaft portion has a recess at the end facing the impeller holding portion that fits into the convex portion. [Effects of the Invention]

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

[0015] [Figure 1] 1 is a cross-sectional view of a blower according to a first embodiment; [Figure 2] FIG. 1 is an enlarged cross-sectional view showing a periphery of a vibration-proof component in a blower according to a first embodiment; [Figure 3] FIG. 1 is a perspective view of a first example of a vibration-damping component included in a blower according to a first embodiment, as viewed from a first surface side; [Figure 4] FIG. 1 is a perspective view of a first example of a vibration-damping component included in a blower according to a first embodiment, viewed from a second surface side; [Figure 5] FIG. 1 is a perspective view showing a state before an impeller is attached to a vibration-proof component according to a first example included in a blower according to a first embodiment; [Figure 6]FIG. 1 is a perspective view showing a state after an impeller is attached to a vibration-proof component according to a first example included in a blower according to a first embodiment; [Figure 7] FIG. 10 is a perspective view of a second example of the vibration-damping component included in the fan according to the first embodiment, as viewed from the first surface side; [Figure 8] FIG. 10 is a perspective view of a second example of the vibration-damping component included in the fan according to the first embodiment, viewed from the second surface side; [Figure 9] FIG. 1 is a perspective view showing a state in which a vibration-isolating component included in the fan according to the first embodiment is attached to a motor shaft of a motor; [Figure 10] A view of Figure 9 from the central axis of the protrusion, which is the central axis of the protrusion. [Figure 11] FIG. 1 is an image diagram illustrating a state in which a vibration-proofing part attached to a motor shaft of a motor included in the fan according to the first embodiment is misaligned; [Figure 12] FIG. 10 is an image illustrating a state in which the vibration-proofing component attached to the motor shaft of the motor included in the fan according to the first embodiment has been returned to an appropriate position; [Figure 13] FIG. 1 is a first diagram showing a procedure for a method of attaching a vibration-isolating component provided in a fan according to a first embodiment to a motor. [Figure 14] FIG. 2 is a second diagram showing the procedure of the method for attaching the vibration-proof component provided in the fan according to the first embodiment to the motor. [Figure 15] FIG. 3 is a third diagram showing a procedure for attaching the vibration-proof component provided in the fan according to the first embodiment to the motor. [Figure 16] FIG. 4 is a fourth diagram showing a procedure for attaching the vibration-isolating component provided in the fan according to the first embodiment to the motor. [Figure 17] 1 is a cross-sectional view of another blower according to the first embodiment; DETAILED DESCRIPTION OF THE INVENTION

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

[0017] Embodiment 1 FIG. 1 is a cross-sectional view of a blower according to a first embodiment. Note that in FIG. 1, some hatching has been omitted for clarity, and the side of the vibration-damping component 6 itself is shown. FIG. 2 is a cross-sectional view showing an enlarged view of the periphery of the vibration-damping component in the blower according to the first embodiment. Note that FIG. 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-damping portion through-hole 6c, which will be described later, and therefore does not show a connecting portion 6b, which will be described later.

[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 a vibration-damping component 6. The blower 1 also includes components provided in a general blower, such as a bell mouth that covers the impeller 4 and a scroll casing, but these 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 portion 4b has a cylindrical shape, and an impeller through-hole 4d, which is a through-hole through which the motor shaft 2a is inserted, is formed in the cylindrical shaft portion. The impeller through-hole 4d is also formed extending from the impeller shaft portion 4b into a part of the impeller portion 4a. The shape of the impeller shaft portion 4b is not limited to a cylindrical shape, and may be any cylindrical shape in which the impeller through-hole 4d is formed.

[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 there are no particular limitations on the method for fixing the impeller 4 to the motor shaft 2a.

[0023] The impeller 4 rotates around the axis of the motor shaft 2a of the motor 2 as the rotation axis 3. In other words, 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 fan 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 fan according to the first embodiment, as viewed from the second surface side. A first surface 6d of a vibration-damping component 61 according to the first example is a surface of a 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. A 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 parts 6a, the first surface 6d and the second surface 6e, which are a pair of back-to-back surfaces, are parallel to each other. 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 6a and a pair of connecting portions 6b connecting the pair of vibration-damping portions 6a. In the vibration-damping component 61, the area surrounded by the pair of vibration-damping portions 6a and the pair of connecting portions 6b is an insertion hole 6i through which the motor shaft 2a is inserted.

[0027] The shape of the surfaces of the pair of connecting portions 6b facing 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 facing the motor shaft 2a have an arc shape. The pair of vibration-proofing 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-proof component 61 by injection molding is improved.

[0029] Note that the cross-sectional shape of connecting portion 6b in a direction perpendicular to the longitudinal direction of connecting portion 6b may be axially symmetric, non-axisymmetric, or rotationally non-symmetric, with the center of the cross-sectional shape of connecting portion 6b in the direction perpendicular to the longitudinal direction of connecting portion 6b as the axis, from the perspective of the strength of vibration-damping component 61 or the ease of attaching vibration-damping component 61 to motor 2. Here, an axisymmetric shape is, for example, a circle. A non-rotationally symmetric shape is, for example, a semicircle. The dimensions of the cross section of connecting portion 6b in the direction perpendicular to the longitudinal direction of connecting portion 6b may be appropriately set taking into consideration the formability of vibration-damping component 61, the strength of vibration-damping component 61, the ease of attaching vibration-damping component 61 to 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 it is molded by injection molding using a mold. This has the advantage that it can be manufactured inexpensively. The fact that a slide mechanism is not required when it is molded by injection molding 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 parts 6a is formed with a vibration-isolating part 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 part through-hole 6c is smaller than the diameter of the pin 2b. Specifically, the inner diameter of the vibration-isolating part through-hole 6c is preferably 60% to 80% of the diameter of the pin 2b.

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

[0035] Therefore, by making the inner diameter dimension 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, where the pair of vibration-isolating portions 6a are arranged with the pair of connecting portions 6b between them. That is, the outer portion of the vibration-isolating portion 6a in the arrangement direction of the vibration-isolating portions 6a is a convex-shaped portion that convex outward. The arrangement direction of the vibration-isolating portions 6a corresponds to the longitudinal direction of the pin 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 at the tip of the free end side of the blade shaft portion 4b of the impeller 4. The tip of the free end side of the blade shaft portion 4b of the impeller 4 is the tip of the blade shaft portion 4b of the impeller 4 on the vibration-damping portion 6a side 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 blade shaft 4b at the tip of the free end side of the blade shaft 4b. 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 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 vibration-damping portion 6a of vibration-damping component 61, but it is preferable that the shape be a shape that follows the shape of the convex portion of vibration-damping portion 6a of vibration-damping component 61, i.e., a shape that matches the convex shape of vibration-damping portion 6a of vibration-damping component 61. By making the concave shape of recess 4e a shape that matches the convex shape of vibration-damping portion 6a of vibration-damping component 61, it becomes easier for blade shaft portion 4b of impeller 4 to fit into vibration-damping portion 6a of vibration-damping component 61, and impeller 4 and vibration-damping component 61 are 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 part 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 part 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] FIG. 7 is a perspective view of a second example of a vibration-damping 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 a vibration-damping component included in the fan according to the first embodiment, as viewed from the second surface side. Similar to the first example, a first surface 6d of a vibration-damping component 62 according to the second example is a surface of a connecting portion 6b that faces the impeller 4 in the axial direction of the motor shaft 2a when the vibration-damping component 62 is attached to the motor shaft 2a of the motor 2. Similar to the first example, a second surface 6e of a vibration-damping component 62 according to the second 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 62 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.

[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 portion through-hole 6c. Here, the central axis of the vibration-isolating portion 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 aligned. 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, vibration-damping component 62 does not require a slide mechanism when molding vibration-damping component 62 by injection molding using a mold, just like vibration-damping component 61. 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 the fan according to the first embodiment is attached to the 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 the motor shaft 2a of the 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 the 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 fan according to the first embodiment 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 fan according to the first embodiment has been returned to the appropriate position. If the position of the vibration-damping part 62 shifts during product cleaning of the fan 1, the user can return the vibration-damping part 62 to the appropriate 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 according to 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 according to 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 according to 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 according to 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 2a of the motor 2, the mounting can be performed in four steps, steps 1 to 4. Here, a case where the motor shaft 2a 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 Fig. 14, the vibration-damping component 62 is stretched in the direction in which the vibration-damping section 6a is arranged, and moved below the pin 2b in the axial direction of the motor shaft 2a. By making the vibration-damping component 62 out of a stretchable material such as rubber, it is possible to stretch the vibration-damping component 62.

[0058] Next, in step 3, as shown in FIG. 15, the pair of vibration-proofing 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-proof components 62 is one example of a method of mounting the vibration-proof components 6. Therefore, the method of mounting the vibration-proof components 6 may be appropriately set 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 view 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 that covers impeller 41 and a scroll casing, but these are not shown or described here.

[0063] Fan 11 uses impeller 41 instead of impeller 4 according to the first embodiment. That is, the type of impeller used in fan 11 is different from that used in fan 1. Impeller 4 of fan 1 shown in FIG. 1 is an impeller generally called an axial-flow or propeller-type impeller. Impeller 41 of 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 for 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-proof part 6 attached to a pin 2b that passes through the motor shaft 2a.

[0065] By including vibration-isolating component 6, blower 11 can obtain the same effects as blower 1 described above. That is, the type of impeller 4 used in a blower to which 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, that is, 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 a 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, vibration-proof component 6 does not require a slide mechanism when molding vibration-proof component 6 by injection molding using a mold, and can be manufactured inexpensively.

[0069] Furthermore, the vibration-proof component 6 can be attached simply by inserting the vibration-proof 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 can suppress vibrations 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. [Explanation of symbols]

[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-proof part, 6a vibration-proof part, 6b connecting part, 6c vibration-proof part through hole, 6d first surface, 6e second surface, 6f protrusion, 6g through-hole center axis, 6h protrusion center axis, 6i insertion hole.

Claims

1. a motor having a motor shaft; a pin that penetrates the motor shaft in a diameter direction of the motor shaft; vibration-isolating components fixed to both ends of the pin protruding from the motor shaft; an impeller having a blade portion and a blade shaft portion inserted into the motor shaft; Equipped with the vibration-damping component includes a pair of impeller holding portions that fit into the impeller shaft portion, and connecting portions that connect the pair of impeller holding portions fixed to the pin on both sides of the motor shaft, the impeller holding portion has a convex portion that is convex on a side facing the impeller shaft portion, the impeller shaft portion has a recess portion at an end portion facing the impeller holding portion, the recess portion fitting into the protruding portion; A blower characterized by:

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

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

4. a protrusion is provided on a surface of the impeller holding portion that does not face the motor shaft; 2. The blower according to claim 1,

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

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

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

8. a cross-sectional shape of the connecting portion in a direction perpendicular to the longitudinal direction of the connecting portion has an axisymmetric shape with the center of the cross-sectional shape as an axis; 2. The blower according to claim 1,

9. a cross-sectional shape of the connecting portion in a direction perpendicular to the longitudinal direction of the connecting portion has a non-axisymmetric shape with the center of the cross-sectional shape as an axis; 2. The blower according to claim 1,

10. a cross-sectional shape of the connecting portion in a direction perpendicular to the longitudinal direction of the connecting portion has a rotationally asymmetric shape with the center of the cross-sectional shape as an axis; 2. The blower according to claim 1,

11. a cross-sectional shape of the connecting portion in a direction perpendicular to the longitudinal direction of the connecting portion has a quadrangular shape with the center of the cross-sectional shape as an axis; 2. The blower according to claim 1,

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

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