JP7001918B2 - Blower - Google Patents

Blower Download PDF

Info

Publication number
JP7001918B2
JP7001918B2 JP2018083014A JP2018083014A JP7001918B2 JP 7001918 B2 JP7001918 B2 JP 7001918B2 JP 2018083014 A JP2018083014 A JP 2018083014A JP 2018083014 A JP2018083014 A JP 2018083014A JP 7001918 B2 JP7001918 B2 JP 7001918B2
Authority
JP
Japan
Prior art keywords
notch
flat surface
blower
plane
rotating shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2018083014A
Other languages
Japanese (ja)
Other versions
JP2019190349A (en
Inventor
洋峻 富岡
裕記 伐栗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP2018083014A priority Critical patent/JP7001918B2/en
Publication of JP2019190349A publication Critical patent/JP2019190349A/en
Application granted granted Critical
Publication of JP7001918B2 publication Critical patent/JP7001918B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

本開示は、送風機に関する。 This disclosure relates to a blower.

特許文献1の送風機は、D字状の断面形状を有する回転軸と、該回転軸が嵌合する穴部(嵌合穴)を有するボス部とを備える。モータによって回転軸が回転駆動されると、回転軸の回転動力がボス部に伝達され、複数の羽根が回転する。 The blower of Patent Document 1 includes a rotating shaft having a D-shaped cross-sectional shape, and a boss portion having a hole portion (fitting hole) into which the rotating shaft is fitted. When the rotary shaft is rotationally driven by the motor, the rotational power of the rotary shaft is transmitted to the boss portion, and the plurality of blades rotate.

特開2001-124101号公報Japanese Unexamined Patent Publication No. 2001-124101

回転軸の回転時には、嵌合穴の内周面の平面部に回転軸の回転トルクが作用する。ここで、回転軸と嵌合穴の内壁との間には、僅かな隙間があるため、回転軸の平面部は、嵌合穴の平面部に対して僅かに傾く状態となる。このため、嵌合穴の平面部では、円弧部に連続する端部において応力が集中し、この部分が徐々に塑性変形することがあった。嵌合穴の内壁の塑性変形に伴い、変形箇所が回転軸と噛み合ってしまうと、回転軸が嵌合穴から抜けなくなり、羽根の交換やメンテナンスが困難になる問題があった。 When the rotating shaft rotates, the rotational torque of the rotating shaft acts on the flat surface of the inner peripheral surface of the fitting hole. Here, since there is a slight gap between the rotating shaft and the inner wall of the fitting hole, the flat surface portion of the rotating shaft is slightly tilted with respect to the flat surface portion of the fitting hole. For this reason, in the flat portion of the fitting hole, stress is concentrated at the end portion continuous with the arc portion, and this portion may be gradually plastically deformed. When the deformed portion meshes with the rotating shaft due to the plastic deformation of the inner wall of the fitting hole, the rotating shaft cannot be pulled out from the fitting hole, and there is a problem that it becomes difficult to replace or maintain the blade.

本開示の目的は、嵌合穴の変形箇所が回転軸と噛み合うことを抑制できる送風機を提供することである。 An object of the present disclosure is to provide a blower capable of suppressing the deformed portion of the fitting hole from engaging with the rotating shaft.

第1の態様は、第1円弧部(22)と第1平面部(23)とを含む外周面(21)を有する回転軸(20)と、前記第1円弧部(22)に対応する第2円弧部(43)と、前記第1平面部(23)に対応する第2平面部(44)とを含む内周面(42)を有する嵌合穴(41)が形成されるボス部(40)とを備え、前記前記第1平面部(23)及び前記第2平面部(44)の少なくとも一方の平面部(23,44)の幅方向の端部(23a,23b,44a,44b)には、切り欠き(51,52,53,54)が形成されることを特徴とする送風機である。 The first aspect corresponds to a rotation axis (20) having an outer peripheral surface (21) including a first arc portion (22) and a first flat surface portion (23), and a first arc portion (22). A boss portion (41) in which a fitting hole (41) having an inner peripheral surface (42) including a second flat surface portion (44) corresponding to the first flat surface portion (23) is formed. 40), and the widthwise end (23a, 23b, 44a, 44b) of at least one of the first flat surface portion (23) and the second flat surface portion (44). Is a blower characterized by the formation of notches (51,52,53,54).

第1の態様では、平面部(23,44)の端部(23a,23b,44a,44b)に切り欠き(51,52,53,54)を形成したため、平面部(23,44)の端部(23a,23b,44a,44b)において回転軸(20)とボス部(40)とが強く接触することを回避できる。これにより、この部位における応力集中を抑制できる。 In the first aspect, since the notch (51,52,53,54) is formed in the end portion (23a, 23b, 44a, 44b) of the flat surface portion (23,44), the end portion of the flat surface portion (23,44) is formed. It is possible to avoid strong contact between the rotation shaft (20) and the boss portion (40) at the portions (23a, 23b, 44a, 44b). As a result, stress concentration at this site can be suppressed.

第2の態様は、第1の態様において、前記切り欠き(51,52,53,54)は、平面状の切り欠き面(51a,51b,51c,51d)を形成していることを特徴とする送風機である。 The second aspect is characterized in that, in the first aspect, the notch (51,52,53,54) forms a planar notch surface (51a, 51b, 51c, 51d). It is a blower to do.

第2の態様では、第1平面部(23)が第2平面部(44)に対して僅かに傾くと、一方の平面部(23,44)の切り欠き面(51a,51b,51c,51d)が、他方の平面部(23,44)と面接触する。これにより、回転トルクに対する受圧面を十分に確保でき、接触部における応力集中を更に抑制できる。 In the second aspect, when the first flat surface portion (23) is slightly tilted with respect to the second flat surface portion (44), the cutout surface (51a, 51b, 51c, 51d) of one flat surface portion (23,44) is formed. ) Makes surface contact with the other flat surface portion (23,44). As a result, a sufficient pressure receiving surface for the rotational torque can be sufficiently secured, and stress concentration in the contact portion can be further suppressed.

第3の態様は、第1又は2の態様において、前記切り欠き(51,52,53,54)は、前記平面部(23,44)の幅方向の両端部(23a,23b,44a,44b)にそれぞれ形成されることを特徴とする送風機である。 In the third aspect, in the first or second aspect, the notch (51,52,53,54) is formed at both ends (23a, 23b, 44a, 44b) in the width direction of the flat surface portion (23,44). ) Is a blower characterized by being formed in each.

第3の態様では、回転軸(20)が逆回転したとしても、回転軸(20)とボス部(40)とが強く接触することを、他方の切り欠き(51,52,53,54)により抑制できる。 In the third aspect, even if the rotation shaft (20) rotates in the reverse direction, the rotation shaft (20) and the boss portion (40) are in strong contact with each other, and the other notch (51,52,53,54). Can be suppressed by

第4の態様は、第1乃至3の態様のいずれか1つにおいて、前記切り欠き(51,52,53,54)は、前記ボス部(40)側のみに形成されることを特徴とする送風機である。 A fourth aspect is characterized in that, in any one of the first to third aspects, the notch (51,52,53,54) is formed only on the boss portion (40) side. It is a blower.

第5の態様は、第1乃至4の態様のいずれか1つにおいて、前記回転軸(20)は、1つの前記第1平面部(23)と、1つの前記第1円弧部(22)とからなる略D字状の外周面(21)を有することを特徴とする送風機である。 In a fifth aspect, in any one of the first to fourth aspects, the rotation axis (20) includes one first plane portion (23) and one first arc portion (22). It is a blower characterized by having a substantially D-shaped outer peripheral surface (21) made of.

図1は、実施形態に係る送風機の概略構成を示す正面図である。FIG. 1 is a front view showing a schematic configuration of a blower according to an embodiment. 図2は、実施形態に係るハブの概略構成を示す縦断面図である。FIG. 2 is a vertical sectional view showing a schematic configuration of a hub according to an embodiment. 図3は、図2のIII-III線断面図である。FIG. 3 is a sectional view taken along line III-III of FIG. 図4は、図3において、回転軸の図示を省略した図である。FIG. 4 is a diagram in which the rotation axis is not shown in FIG. 図5は、図2において、切り欠きと回転軸とが面接触した状態を示す拡大図である。FIG. 5 is an enlarged view showing a state in which the notch and the rotating shaft are in surface contact with each other in FIG. 2. 図6は、変形例1に係る図3に相当する図である。FIG. 6 is a diagram corresponding to FIG. 3 according to the modified example 1. 図7は、変形例2に係る図3に相当する図である。FIG. 7 is a diagram corresponding to FIG. 3 according to the modified example 2.

《実施形態》
本実施形態の送風機(10)について図面を参照しながら説明する。
<< Embodiment >>
The blower (10) of the present embodiment will be described with reference to the drawings.

〈全体構成〉
送風機(10)は、例えば空気調和機の室外ユニットに適用される。送風機(10)は、軸流送風機であるプロペラファンを構成している。図1に示すように、送風機(10)は、電動機(11)と、電動機(11)によって回転駆動される回転軸(20)と、回転軸(20)と連結する羽根車(30)とを備える。回転軸(20)は金属材料で構成され、羽根車(30)は回転軸(20)よりも剛性が低い樹脂材料で構成される。羽根車(30)は、略円筒状のハブ(31)と、ハブ(31)の外周面に支持される複数の羽根(38)とを備える。
<overall structure>
The blower (10) is applied to, for example, an outdoor unit of an air conditioner. The blower (10) constitutes a propeller fan which is an axial blower. As shown in FIG. 1, the blower (10) has an electric motor (11), a rotating shaft (20) rotationally driven by the electric motor (11), and an impeller (30) connected to the rotating shaft (20). Be prepared. The rotating shaft (20) is made of a metal material, and the impeller (30) is made of a resin material having a lower rigidity than the rotating shaft (20). The impeller (30) comprises a substantially cylindrical hub (31) and a plurality of blades (38) supported on the outer peripheral surface of the hub (31).

図2に示すように、ハブ(31)は、外筒(32)、底板(33)、蓋(34)、及びボス部(40)を有する。外筒(32)は、中空円筒状に形成される。底板(33)は、外筒(32)の軸方向の一端側(電動機(11)側)の開口を閉塞する。蓋(34)は、外筒(32)の軸方向の他端側(電動機(11)と反対側)の開口を閉塞する。ボス部(40)は、底板(33)の内壁の中央部から軸方向内方へ突出している。 As shown in FIG. 2, the hub (31) has an outer cylinder (32), a bottom plate (33), a lid (34), and a boss portion (40). The outer cylinder (32) is formed in a hollow cylindrical shape. The bottom plate (33) closes the opening on one end side (motor (11) side) of the outer cylinder (32) in the axial direction. The lid (34) closes the opening on the other end side (opposite side of the motor (11)) of the outer cylinder (32) in the axial direction. The boss portion (40) protrudes inward in the axial direction from the central portion of the inner wall of the bottom plate (33).

〈回転軸及びボス部の詳細構造〉
回転軸(20)及びボス部(40)について、図3~図5を参照しながら詳細に説明する。なお、これらの図においては、詳細は後述する切り欠きの大きさや、切り欠き面の傾斜する角度、幅などを誇張している。
<Detailed structure of rotating shaft and boss>
The rotation shaft (20) and the boss portion (40) will be described in detail with reference to FIGS. 3 to 5. In these figures, the size of the notch, the angle at which the notch surface is inclined, the width, and the like are exaggerated in detail.

本実施形態の回転軸(20)は、軸直角断面視において、略D字形状の外周面(21)を有する。つまり、回転軸(20)の外周面(21)には、1つの第1円弧部(22)と、1つの第1平面部(23)とが形成される。 The rotation axis (20) of the present embodiment has a substantially D-shaped outer peripheral surface (21) in a cross-sectional view perpendicular to the axis. That is, one first arc portion (22) and one first plane portion (23) are formed on the outer peripheral surface (21) of the rotation axis (20).

ボス部(40)には、回転軸(20)が嵌合する嵌合穴(41)が形成される。本実施形態の嵌合穴(41)は、軸直角断面視において、略D字形状の内周面(42)を有する。つまり、嵌合穴(41)の内周面(42)は、回転軸(20)の外周面(21)に対応する形状をしている。ボス部(40)の内周面(42)には、第1円弧部(22)に対応する1つの第2円弧部(43)と、第2平面部(44)に対応する1つの第2平面部(44)とが形成される。嵌合穴(41)の内周面(42)と、回転軸(20)の外周面(21)との間には、嵌め合い公差に起因する隙間が形成される。 A fitting hole (41) into which the rotation shaft (20) is fitted is formed in the boss portion (40). The fitting hole (41) of the present embodiment has a substantially D-shaped inner peripheral surface (42) in a cross-sectional view perpendicular to the axis. That is, the inner peripheral surface (42) of the fitting hole (41) has a shape corresponding to the outer peripheral surface (21) of the rotating shaft (20). On the inner peripheral surface (42) of the boss portion (40), one second arc portion (43) corresponding to the first arc portion (22) and one second corresponding to the second flat surface portion (44). A flat surface portion (44) is formed. A gap due to the fitting tolerance is formed between the inner peripheral surface (42) of the fitting hole (41) and the outer peripheral surface (21) of the rotating shaft (20).

本実施形態では、ボス部(40)側の平面部(第2平面部(44))に切り欠き(51,52)が形成される。本実施形態では、第2平面部(44)の幅方向(図3の左右方向)の両端にそれぞれ切り欠き(51,52)が形成される。つまり、第2平面部(44)には、その幅方向の両端のうち、回転軸(20)の回転方向(図3の矢印Aで示す方向)の後側の端部(第1端部(44a))に第1切り欠き(51)が形成される。第2平面部(44)には、その幅方向の両端のうち、回転軸(20)の回転方向の前側に対応する端部(第2端部(44b))に第2切り欠き(52)が形成される。 In the present embodiment, a notch (51, 52) is formed in the flat surface portion (second flat surface portion (44)) on the boss portion (40) side. In the present embodiment, notches (51, 52) are formed at both ends of the second plane portion (44) in the width direction (left-right direction in FIG. 3). That is, the second flat surface portion (44) has a rear end portion (first end portion (first end portion) on the rear side of the rotation direction (direction indicated by the arrow A in FIG. 3) of the rotation axis (20) among both ends in the width direction. The first notch (51) is formed in 44a)). The second plane portion (44) has a second notch (52) at both ends in the width direction corresponding to the front side in the rotation direction of the rotation axis (20) (second end portion (44b)). Is formed.

第1切り欠き(51)は、平面状の第1切り欠き面(51a)を形成している。図4に示すように、第1切り欠き面(51a)は、第2平面部(44)に対して所定の角度θ1をなしている。第1切り欠き面(51a)の幅aは、第2平面部(44)の幅よりも小さい。第1切り欠き面(51a)は、順方向に回転する回転軸(20)の第1平面部(23)が面接触する受圧面を構成している。 The first notch (51) forms a planar first notch surface (51a). As shown in FIG. 4, the first notched surface (51a) forms a predetermined angle θ1 with respect to the second plane portion (44). The width a of the first notched surface (51a) is smaller than the width of the second flat surface portion (44). The first notched surface (51a) constitutes a pressure receiving surface in which the first plane portion (23) of the rotating shaft (20) rotating in the forward direction is in surface contact.

本実施形態の第2切り欠き(52)は、第2平面部(44)を挟んで第1切り欠き(51)と対称形状に構成される。つまり、第2切り欠き(52)は、平面状の第2切り欠き面(52a)を形成している。本実施形態では、第2平面部(44)に対する第2切り欠き面(52a)のなす角度θ2が、θ1と等しい。本実施形態では、第2切り欠き面(52a)の幅bは、第1切り欠き面(51a)の幅aと等しい。なお、第2切り欠き面(52a)の角度θ2及び幅bは、第1切り欠き面(51a)の角度θ1及び幅aと異なる値であってもよい。第2切り欠き面(52a)は、逆方向に回転する回転軸(20)の第2平面部(44)が面接触する受圧面を構成する。 The second notch (52) of the present embodiment is configured to have a symmetrical shape with the first notch (51) with the second plane portion (44) interposed therebetween. That is, the second notch (52) forms a planar second notch surface (52a). In the present embodiment, the angle θ2 formed by the second notched surface (52a) with respect to the second plane portion (44) is equal to θ1. In the present embodiment, the width b of the second notched surface (52a) is equal to the width a of the first notched surface (51a). The angle θ2 and the width b of the second notch surface (52a) may be different from the angle θ1 and the width a of the first notch surface (51a). The second notched surface (52a) constitutes a pressure receiving surface with which the second plane portion (44) of the rotating shaft (20) rotating in the opposite direction is in surface contact.

回転軸(20)の第1平面部(23)と、ボス部(40)の第1切り欠き(51)との間には、第1空間(S1)が形成される。第1空間(S1)は、送風機(10)の運転中に回転軸(20)が順方向に回転する際、第1平面部(23)の幅方向の一端部(23a)が入り込む空間といえる。回転軸(20)の第2平面部(44)と、ボス部(40)の第2切り欠き(52)との間には、第2空間(S2)が形成される。第2空間(S2)は、風などの影響により、回転軸(20)が逆方向に回転する際、第1平面部(23)の幅方向の他端部(23b)が入り込む空間といえる。 A first space (S1) is formed between the first plane portion (23) of the rotation axis (20) and the first notch (51) of the boss portion (40). It can be said that the first space (S1) is a space in which one end (23a) in the width direction of the first flat surface portion (23) enters when the rotation axis (20) rotates in the forward direction during the operation of the blower (10). .. A second space (S2) is formed between the second plane portion (44) of the rotation axis (20) and the second notch (52) of the boss portion (40). It can be said that the second space (S2) is a space in which the other end portion (23b) in the width direction of the first plane portion (23) enters when the rotation axis (20) rotates in the opposite direction due to the influence of wind or the like.

-切り欠きの作用など-
第1切り欠き(51)は、送風機(10)の長期の使用に伴い、ボス部(40)の内周面(42)が塑性変形してしまうのを抑制するために機能する。この点について詳細に説明する。
-The action of the notch-
The first notch (51) functions to prevent the inner peripheral surface (42) of the boss portion (40) from being plastically deformed with the long-term use of the blower (10). This point will be described in detail.

送風機(10)の運転時には、電動機(11)によって回転軸(20)が回転駆動される。この際、回転軸(20)の第1平面部(23)と、ボス部(40)の第2平面部(44)とが面接触し、羽根車(30)が回転駆動される。 When the blower (10) is in operation, the rotary shaft (20) is rotationally driven by the electric motor (11). At this time, the first plane portion (23) of the rotation shaft (20) and the second plane portion (44) of the boss portion (40) come into surface contact with each other, and the impeller (30) is rotationally driven.

従来の構成では、第2平面部(44)に切り欠きがない。このため、回転軸(20)と嵌合穴(41)の嵌め合い公差に起因する隙間の影響により、回転軸(20)の第1平面部(23)が、第2平面部(44)に対して僅かに傾くと、第1平面部(23)の端部が第2平面部(44)の端部に局所的に接触する。この結果、第2平面部(44)の端部に応力が集中し、この端部が塑性変形してしまう。すると、嵌合穴(41)の内周面(42)の塑性変形した部位が、回転軸(20)と噛み合い、回転軸(20)を嵌合穴(41)から引き抜くことが困難となることがあった。この場合、羽根車(30)を回転軸(20)から容易に取り外すことができなくなり、羽根車(30)の交換作業やメンテナンス作業が煩雑となるという問題があった。 In the conventional configuration, there is no notch in the second plane portion (44). Therefore, due to the influence of the gap caused by the fitting tolerance between the rotating shaft (20) and the fitting hole (41), the first flat surface portion (23) of the rotating shaft (20) becomes the second flat surface portion (44). On the other hand, when it is slightly tilted, the end portion of the first flat surface portion (23) locally contacts the end portion of the second flat surface portion (44). As a result, stress is concentrated on the end of the second flat surface portion (44), and this end is plastically deformed. Then, the plastically deformed portion of the inner peripheral surface (42) of the fitting hole (41) meshes with the rotating shaft (20), and it becomes difficult to pull out the rotating shaft (20) from the fitting hole (41). was there. In this case, there is a problem that the impeller (30) cannot be easily removed from the rotating shaft (20), and the replacement work and maintenance work of the impeller (30) become complicated.

これに対し、本実施形態では、第2平面部(44)の第1端部(44a)に第1切り欠き(51)を形成している。図5に示すように、回転軸(20)が順方向に回転する際、隙間の影響により、回転軸(20)の第1平面部(23)が嵌合穴(41)の第2平面部(44)に対して僅かに傾くと、第1平面部(23)の一端部(23a)が第1空間(S1)に入り込む。これにより、第1平面部(23)の一端部(23a)が第2平面部(44)の第1端部(44a)に強く接触することを回避でき、嵌合穴(41)の内周面(42)の塑性変形を抑制できる。 On the other hand, in the present embodiment, the first notch (51) is formed in the first end portion (44a) of the second flat surface portion (44). As shown in FIG. 5, when the rotation shaft (20) rotates in the forward direction, the first plane portion (23) of the rotation shaft (20) becomes the second plane portion of the fitting hole (41) due to the influence of the gap. When slightly tilted with respect to (44), one end (23a) of the first plane portion (23) enters the first space (S1). As a result, it is possible to prevent the one end portion (23a) of the first flat surface portion (23) from strongly contacting the first end portion (44a) of the second flat surface portion (44), and the inner circumference of the fitting hole (41) can be prevented. Plastic deformation of the surface (42) can be suppressed.

図5に示すように、第1平面部(23)が第2平面部(44)に対して僅かに傾くと、第1平面部(23)が第1切り欠き(51)の第1切り欠き面(51a)と面接触する。つまり、第1切り欠き面(51a)により、回転軸(20)のトルクを受ける受圧面を十分に確保できるので、第1切り欠き(51)における応力集中を回避できる。この結果、嵌合穴(41)の内周面(42)の塑性変形を抑制できる。 As shown in FIG. 5, when the first plane portion (23) is slightly tilted with respect to the second plane portion (44), the first plane portion (23) becomes the first notch of the first notch (51). Surface contact with surface (51a). That is, since the pressure receiving surface that receives the torque of the rotating shaft (20) can be sufficiently secured by the first notch surface (51a), stress concentration in the first notch (51) can be avoided. As a result, plastic deformation of the inner peripheral surface (42) of the fitting hole (41) can be suppressed.

第1切り欠き(51)は、第1平面部(23)と第1切り欠き面(51a)とが確実に面接触し、且つ第1切り欠き(51)の塑性変形を確実に抑制できるように、第1切り欠き面(51a)の幅a、及び傾きθ1が設定されている。具体的には、まず、回転軸(20)と嵌合穴(41)の間の嵌め合い公差に起因する隙間の大きさ、回転軸(20)の回転時にボス部(40)側に作用する荷重、及びボス部(40)の耐力、ボス部(40)と回転軸(20)の嵌め合い部分の軸方向の長さなどを考慮し、第1切り欠き面(51a)の最適な幅aを決定する。次いで、回転軸(20)を嵌合穴(41)と同軸上において仮想的に回転させた場合に、第1切り欠き面(51a)が第1平面部(23)の軌跡と略一致し、且つ第1切り欠き面(51a)が上記の最適な幅aとなる角度を、第1切り欠き(51)の最適な傾きθ1とする。 The first notch (51) ensures that the first plane portion (23) and the first notch surface (51a) are in surface contact with each other, and that the plastic deformation of the first notch (51) can be reliably suppressed. The width a and the inclination θ1 of the first notched surface (51a) are set in 1. Specifically, first, the size of the gap due to the fitting tolerance between the rotating shaft (20) and the fitting hole (41), and the action on the boss portion (40) side when the rotating shaft (20) rotates. Optimal width a of the first notch surface (51a) in consideration of the load, the bearing capacity of the boss portion (40), the axial length of the fitting portion between the boss portion (40) and the rotating shaft (20), etc. To determine. Next, when the rotation axis (20) is virtually rotated coaxially with the fitting hole (41), the first notched surface (51a) substantially coincides with the locus of the first plane portion (23). The angle at which the first notch surface (51a) has the optimum width a is defined as the optimum inclination θ1 of the first notch (51).

このように、第1切り欠き面(51a)の幅a、及び傾きθ1を決定することで、第1平面部(23)と第1切り欠き(51)とを確実に面接触させることができ、且つ第1切り欠き面(51a)において十分な受圧面を確保できる。 By determining the width a and the inclination θ1 of the first notch surface (51a) in this way, the first plane portion (23) and the first notch (51) can be reliably surface-contacted. Moreover, a sufficient pressure receiving surface can be secured on the first notched surface (51a).

本実施形態では、風などの影響により、回転軸(20)が逆回転することも考慮し、第2平面部(44)の第2端部(44b)に第2切り欠き(52)を形成している。つまり、回転軸(20)が逆方向に回転する際、隙間の影響により、回転軸(20)の第1平面部(23)が嵌合穴(41)の第2平面部(44)に対して僅かに傾くと、第1平面部(23)の他端部(23b)が第2空間(S2)に入り込む。これにより、第1平面部(23)の他端部(23b)が第2平面部(44)の第2端部(44b)に強く接触することを回避でき、嵌合穴(41)の内周面(42)の塑性変形を抑制できる。また、第1平面部(23)が第2切り欠き面(52a)と面接触することで、第2切り欠き面(52a)の塑性変形を確実に抑制できる。 In the present embodiment, a second notch (52) is formed at the second end portion (44b) of the second flat surface portion (44) in consideration of the fact that the rotation axis (20) rotates in the reverse direction due to the influence of wind or the like. is doing. That is, when the rotation axis (20) rotates in the opposite direction, the first plane portion (23) of the rotation axis (20) with respect to the second plane portion (44) of the fitting hole (41) due to the influence of the gap. When it is slightly tilted, the other end portion (23b) of the first plane portion (23) enters the second space (S2). As a result, it is possible to prevent the other end portion (23b) of the first flat surface portion (23) from strongly contacting the second end portion (44b) of the second flat surface portion (44), and the inside of the fitting hole (41) can be prevented. The plastic deformation of the peripheral surface (42) can be suppressed. Further, when the first flat surface portion (23) comes into surface contact with the second notched surface (52a), the plastic deformation of the second notched surface (52a) can be reliably suppressed.

-実施形態の効果-
上記実施形態では、ボス部(40)側の第2平面部(44)の両端部(44a,44b)にそれぞれ切り欠き(51,52,53,54)を形成している。このため、送風機(10)の運転時において、第1平面部(23)が第2平面部(44)に対して僅かに傾くと、第1平面部(23)の一端部(23a)が第1空間(S1)に入り込む。この結果、第1平面部(23)と第2平面部(44)とが局所的に強く接触することを回避できる。この結果、嵌合穴(41)の内周面(42)が、応力集中に起因して塑性変形してしまうことを抑制できる。
-Effect of embodiment-
In the above embodiment, notches (51,52,53,54) are formed at both ends (44a, 44b) of the second flat surface portion (44) on the boss portion (40) side, respectively. Therefore, when the first flat surface portion (23) is slightly tilted with respect to the second flat surface portion (44) during operation of the blower (10), one end portion (23a) of the first flat surface portion (23) becomes the first. Enter one space (S1). As a result, it is possible to avoid strong local contact between the first plane portion (23) and the second plane portion (44). As a result, it is possible to prevent the inner peripheral surface (42) of the fitting hole (41) from being plastically deformed due to stress concentration.

上記実施形態では、第1切り欠き(51)において、平面状の第1切り欠き面(51a)を形成している。このため、図5に示すように、第1平面部(23)が傾くと、第1平面部(23)が第1切り欠き面(51a)に面接触するため、嵌合穴(41)に作用する面圧を低減できる。この結果、嵌合穴(41)の内周面(42)の塑性変形を一層確実に抑制できる。 In the above embodiment, the first notch (51) forms a planar first notch surface (51a). Therefore, as shown in FIG. 5, when the first flat surface portion (23) is tilted, the first flat surface portion (23) comes into surface contact with the first cutout surface (51a), so that the fitting hole (41) is formed. The acting surface pressure can be reduced. As a result, the plastic deformation of the inner peripheral surface (42) of the fitting hole (41) can be suppressed more reliably.

このようにして、嵌合穴(41)の塑性変形を抑制することで、変形した部分と回転軸(20)とが噛み合ってしまうことを確実に回避できる。この結果、羽根車(30)を回転軸(20)から容易に取り外すことができ、羽根車(30)の交換やメンテナンスを簡便に行うことができる。 By suppressing the plastic deformation of the fitting hole (41) in this way, it is possible to reliably avoid the deformed portion and the rotating shaft (20) from meshing with each other. As a result, the impeller (30) can be easily removed from the rotating shaft (20), and the impeller (30) can be easily replaced and maintained.

上記実施形態では、第1平面部(23)の第2端部(44b)に第2切り欠き(52)を形成している。このため、風の影響などにより回転軸(20)が逆回転したとしても、第1切り欠き(51)と同様の作用効果により、嵌合穴(41)の内周面(42)の塑性変形を抑制できる。 In the above embodiment, the second notch (52) is formed in the second end portion (44b) of the first plane portion (23). Therefore, even if the rotating shaft (20) rotates in the reverse direction due to the influence of wind or the like, the inner peripheral surface (42) of the fitting hole (41) is plastically deformed due to the same effect as that of the first notch (51). Can be suppressed.

《実施形態の変形例》
上記実施形態においては、以下のような変形例の構成としてもよい。
<< Modification of Embodiment >>
In the above embodiment, the configuration of the following modification may be used.

〈変形例1〉
図6に示す変形例1では、回転軸(20)側の平面部(第1平面部(23))の幅方向の端部に切り欠き(53,54)が形成される。変形例1では、第1平面部(23)の幅方向の両端にそれぞれ切り欠き(53,54)を形成している。つまり、第1平面部(23)には、その幅方向の両端のうち、回転軸(20)の回転方向(図6の矢印Aで示す方向)の後側の端部に第3切り欠き(53)が形成される。第1平面部(23)には、その幅方向の両端のうち、回転軸(20)の回転方向の前側の端部に第4切り欠き(54)が形成される。変形例1では、第2平面部(44)に切り欠きが形成されていない。第3切り欠き(53)と第2平面部(44)との間には、第1空間(S1)が形成される。第4切り欠き(54)と第2平面部(44)との間には、第2空間(S2)が形成される。
<Modification example 1>
In the modified example 1 shown in FIG. 6, a notch (53,54) is formed at the widthwise end portion of the flat surface portion (first flat surface portion (23)) on the rotation axis (20) side. In the first modification, notches (53, 54) are formed at both ends of the first plane portion (23) in the width direction. That is, the first plane portion (23) has a third notch (3rd notch) at the rear end of the rotation direction (direction indicated by the arrow A in FIG. 6) of the rotation axis (20) among both ends in the width direction. 53) is formed. A fourth notch (54) is formed in the first plane portion (23) at both ends in the width direction on the front side in the rotation direction of the rotation axis (20). In the first modification, the notch is not formed in the second plane portion (44). A first space (S1) is formed between the third notch (53) and the second plane portion (44). A second space (S2) is formed between the fourth notch (54) and the second flat surface portion (44).

変形例1では、回転軸(20)の順方向の回転に伴い第1平面部(23)が第2平面部(44)に対して僅かに傾くと、第3切り欠き面(53a)と第2平面部(44)とが面接触する。これにより、上述した実施形態と同様にして、第2平面部(44)の塑性変形を抑制できる。 In the first modification, when the first plane portion (23) is slightly tilted with respect to the second plane portion (44) due to the forward rotation of the rotation axis (20), the third notch surface (53a) and the third 2 Surface contact with the flat surface portion (44). Thereby, the plastic deformation of the second plane portion (44) can be suppressed in the same manner as in the above-described embodiment.

同様に、回転軸(20)の順方向の回転に伴い第1平面部(23)が第2平面部(44)に対して僅かに傾くと、第4切り欠き面(54a)と第2平面部(44)とが面接触する。これにより、上述した実施形態と同様にして、第2平面部(44)の塑性変形を抑制できる。 Similarly, when the first plane portion (23) is slightly tilted with respect to the second plane portion (44) due to the forward rotation of the rotation axis (20), the fourth notch surface (54a) and the second plane The part (44) comes into surface contact. Thereby, the plastic deformation of the second plane portion (44) can be suppressed in the same manner as in the above-described embodiment.

なお、第1平面部(23)と第2平面部(44)との双方に切り欠きを形成してもよい。 Notches may be formed in both the first flat surface portion (23) and the second flat surface portion (44).

〈変形例2〉
図7に示す変形例2は、回転軸(20)の外周面(21)に、2つの第1円弧部(22)と、2つの第1平面部(23)とがそれぞれ形成される。2つの第1円弧部(22)は、回転軸(20)の軸心を挟んで反対側の位置にある。2つの第1平面部(23)は、回転軸(20)の軸心を挟んで反対側の位置にある。
<Modification 2>
In the modified example 2 shown in FIG. 7, two first arc portions (22) and two first plane portions (23) are formed on the outer peripheral surface (21) of the rotation axis (20), respectively. The two first arc portions (22) are located on opposite sides of the axis of the rotation axis (20). The two first plane portions (23) are located on opposite sides of the axis of the rotation axis (20).

変形例2の嵌合穴(41)の内周面(42)には、2つの第2円弧部(43)と、2つの第2平面部(44)とがそれぞれ形成される。2つの第2円弧部(43)は、回転軸(20)の軸心を挟んで反対側の位置にある。2つの第2平面部(44)は、回転軸(20)の軸心を挟んで反対側の位置にある。この例では、2つの第2平面部(44)にそれぞれ切り欠き(51,52)が形成される。各切り欠き(51,52)には、第1平面部(23)と面接触する切り欠き面(51a,52a)がそれぞれ形成される。 Two second arc portions (43) and two second plane portions (44) are formed on the inner peripheral surface (42) of the fitting hole (41) of the modification 2. The two second arc portions (43) are located on opposite sides of the axis of the rotation axis (20). The two second plane portions (44) are located on opposite sides of the axis of the rotation axis (20). In this example, notches (51, 52) are formed in the two second plane portions (44), respectively. Each notch (51, 52) is formed with a notch surface (51a, 52a) that comes into surface contact with the first flat surface portion (23).

《その他の実施形態》
上記実施形態では、第1平面部(23)の幅方向の両端部にそれぞれ切り欠き(51,52)を形成している。しかしながら、第1平面部(23)の幅方向のうちの1つの端部のみに切り欠き(51)を形成してもよい。この場合、第1平面部(23)の両端部のうち回転方向の後側に対応する端部のみに切り欠き(51)を形成するとよい。同様に、第2平面部(44)の幅方向のうちの1つの端部のみに切り欠き(53)を形成してもよい。この場合、第2平面部(44)の両端部のうち回転方向の後側に対応する端部のみに切り欠き(53)を形成するとよい。
<< Other Embodiments >>
In the above embodiment, notches (51, 52) are formed at both ends of the first plane portion (23) in the width direction, respectively. However, the notch (51) may be formed only at one end in the width direction of the first plane portion (23). In this case, it is preferable to form notches (51) only at the ends corresponding to the rear side in the rotation direction among both ends of the first flat surface portion (23). Similarly, a notch (53) may be formed only at one end in the width direction of the second plane portion (44). In this case, it is preferable to form notches (53) only at the ends corresponding to the rear side in the rotation direction among both ends of the second flat surface portion (44).

切り欠き(51,52,53,54)によって形成される切り欠き面(51a,52a,53a,54a)は、必ずしも平面状でなくてもよく、例えば曲面状、円弧面状であってもよい。 The notch surface (51a, 52a, 53a, 54a) formed by the notch (51,52,53,54) does not necessarily have to be planar, and may be, for example, a curved surface or an arc surface. ..

上記実施形態の送風機(10)は、回転軸(20)及びボス部(40)を有するものであれば、他の方式であってもよい。例えば送風機(10)は、シロッコファン、ターボファン等の遠心送風機であってもよいし、他の軸流送風機であってもよいし、クロスフローファン等の横流送風機であってもよい。 The blower (10) of the above embodiment may be of another type as long as it has a rotating shaft (20) and a boss portion (40). For example, the blower (10) may be a centrifugal blower such as a sirocco fan or a turbo fan, may be another axial flow blower, or may be a cross flow blower such as a cross flow fan.

以上の実施形態や変形例は、本質的に好ましい例示であって、本発明、その適用物、あるいはその用途の範囲を制限することを意図するものではない。以上、実施形態および変形例を説明したが、特許請求の範囲の趣旨および範囲から逸脱することなく、形態や詳細の多様な変更が可能なことが理解されるであろう。また、以上の実施形態および変形例は、本開示の対象の機能を損なわない限り、適宜組み合わせたり、置換したりしてもよい。以上に述べた「第1」、「第2」、「第3」…という記載は、これらの記載が付与された語句を区別するために用いられており、その語句の数や順序までも限定するものではない。 The above embodiments and modifications are essentially preferred examples and are not intended to limit the scope of the invention, its applications, or its uses. Although the embodiments and modifications have been described above, it will be understood that various modifications of the forms and details are possible without departing from the spirit and scope of the claims. Further, the above embodiments and modifications may be appropriately combined or replaced as long as the functions of the subject of the present disclosure are not impaired. The descriptions "1st", "2nd", "3rd" ... described above are used to distinguish the words and phrases to which these descriptions are given, and the number and order of the words and phrases are also limited. It's not something to do.

以上説明したように、本開示は、送風機について有用である。 As described above, the present disclosure is useful for blowers.

10 送風機
20 回転軸
21 外周面
22 第1円弧部
23 第1平面部
40 ボス部
41 嵌合穴
42 内周面
43 第2円弧部
44 第2平面部
51 第1切り欠き
51a 第1切り欠き面
52 第2切り欠き
52a 第2切り欠き面
53 第3切り欠き
53a 第3切り欠き面
54 第4切り欠き
54a 第4切り欠き面
10 Blower 20 Rotating shaft 21 Outer peripheral surface 22 First arc portion 23 First plane portion 40 Boss portion 41 Fitting hole 42 Inner peripheral surface 43 Second arc portion 44 Second plane portion 51 First notch 51a First notch surface 52 2nd notch 52a 2nd notch surface 53 3rd notch 53a 3rd notch surface 54 4th notch 54a 4th notch surface

Claims (4)

第1円弧部(22)と第1平面部(23)とを含む外周面(21)を有する回転軸(20)と、
前記第1円弧部(22)に対応する第2円弧部(43)と、前記第1平面部(23)に対応する第2平面部(44)とを含む内周面(42)を有する嵌合穴(41)が形成されるボス部(40)とを備え、
前記第1平面部(23)及び前記第2平面部(44)の少なくとも一方の平面部(23,44)の幅方向の端部(23a,23b,44a,44b)には、切り欠き(51,52,53,54)が形成され
前記切り欠き(51,52,53,54)は、平面状の切り欠き面(51a,51b,51c,51d)を形成し、
前記切り欠き面(51a,51b,51c,51d)は、前記回転軸(20)の回転時において、前記第1平面部(23)及び前記第2平面部(44)のうち他方の平面部(23,24)と面接触する
ることを特徴とする送風機。
A rotation axis (20) having an outer peripheral surface (21) including a first arc portion (22) and a first flat surface portion (23),
Fitting having an inner peripheral surface (42) including a second arc portion (43) corresponding to the first arc portion (22) and a second plane portion (44) corresponding to the first flat surface portion (23). With a boss part (40) where a joint hole (41) is formed,
A notch (51) is formed in the widthwise end portion (23a, 23b, 44a, 44b) of at least one flat surface portion (23,44) of the first flat surface portion (23) and the second flat surface portion (44). , 52,53,54) was formed ,
The notch (51,52,53,54) forms a planar notch surface (51a, 51b, 51c, 51d).
The cutout surface (51a, 51b, 51c, 51d) is the other flat surface portion (23) of the first flat surface portion (23) and the second flat surface portion (44) when the rotation axis (20) is rotated. Face contact with 23,24)
A blower characterized by that.
請求項1において、
前記切り欠き(51,52,53,54)は、前記平面部(23,44)の幅方向の両端部(23a,23b,44a,44b)にそれぞれ形成されることを特徴とする送風機。
In claim 1 ,
The blower is characterized in that the notches (51,52,53,54) are formed at both ends (23a, 23b, 44a, 44b) in the width direction of the flat surface portion (23,44), respectively.
請求項1または2において、
前記切り欠き(51,52,53,54)は、前記ボス部(40)側のみに形成されることを特徴とする送風機。
In claim 1 or 2 ,
The blower characterized in that the notch (51,52,53,54) is formed only on the boss portion (40) side.
請求項1乃至のいずれか1つにおいて、
前記回転軸(20)は、1つの前記第1平面部(23)と、1つの前記第1円弧部(22)とからなる略D字状の外周面(21)を有することを特徴とする送風機。
In any one of claims 1 to 3 ,
The rotation axis (20) is characterized by having a substantially D-shaped outer peripheral surface (21) including one first plane portion (23) and one first arc portion (22). Blower.
JP2018083014A 2018-04-24 2018-04-24 Blower Active JP7001918B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018083014A JP7001918B2 (en) 2018-04-24 2018-04-24 Blower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018083014A JP7001918B2 (en) 2018-04-24 2018-04-24 Blower

Publications (2)

Publication Number Publication Date
JP2019190349A JP2019190349A (en) 2019-10-31
JP7001918B2 true JP7001918B2 (en) 2022-01-20

Family

ID=68389614

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018083014A Active JP7001918B2 (en) 2018-04-24 2018-04-24 Blower

Country Status (1)

Country Link
JP (1) JP7001918B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007285237A (en) 2006-04-18 2007-11-01 Max Co Ltd Rotary fan and blower device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3768551B2 (en) * 1993-04-20 2006-04-19 株式会社デンソー Rotating device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007285237A (en) 2006-04-18 2007-11-01 Max Co Ltd Rotary fan and blower device

Also Published As

Publication number Publication date
JP2019190349A (en) 2019-10-31

Similar Documents

Publication Publication Date Title
US10400604B2 (en) Axial fan with grooved trailing edge and outdoor unit
US20090047133A1 (en) Impeller blade for centrifugal blower, blade-supporting rotator, impeller for centrifugal blower, and method for manufacturing impeller for centrifugal blower
US20150240645A1 (en) Propeller fan and air conditioner equipped with same
WO2006011036A1 (en) Axial impeller with enhanced flow
US20070065279A1 (en) Blade structure for a radial airflow fan
JP7001918B2 (en) Blower
JP5100711B2 (en) Turbo fan
JP4680840B2 (en) Axial blower
WO2021075034A1 (en) Blower
JP2010150945A (en) Axial fan and outdoor unit for air conditioner
JPWO2021186676A5 (en)
JP6192419B2 (en) Propeller fan
JPH10148196A (en) Cross flow fan and manufacture of multiblade impeller thereof
JP2007278193A (en) Blower
KR20170116754A (en) High pressure centrifugal impeller
JP4649146B2 (en) Propeller fan
JPH05321894A (en) Axial flow fan
JP2005155579A (en) Multiblade blower fan
JP5724380B2 (en) Axial fan
CN218598452U (en) Fan blade, fan assembly and air conditioner
JP7122953B2 (en) propeller fan
JP2005155580A (en) Centrifugal multiblade blower
WO2019202641A1 (en) Propeller fan
JP4680947B2 (en) Propeller fan
JP5973539B2 (en) Press hub for fans

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210201

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210928

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20211105

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20211124

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20211207