JP5244009B2 - Fan boss - Google Patents

Description

  The present invention relates to a fan boss for attaching a fan used for blowing air to a rotating shaft of a driving device such as a motor.

  The fan boss is interposed between a rotating shaft of a driving device such as a motor and the fan (see, for example, Patent Document 1). FIG. 10 shows an axial sectional view of a fan boss for a conventional cross flow fan. As shown in FIG. 10, the fan boss 100 includes an aluminum boss body 101, a SPCC (cold rolled steel plate) connection member 102, and a rubber vibration isolation member 103.

  The boss body 101 includes a rotation shaft insertion hole 101a and a fixing screw insertion hole 101b. A rotation shaft 104 of a motor (not shown) is inserted through the rotation shaft insertion hole 101a. A fixing screw 105 is inserted through the fixing screw insertion hole 101b. The screw portion 101c on the inner peripheral surface of the fixing screw insertion hole 101b and the screw portion 105c on the outer peripheral surface of the fixing screw 105 mesh with each other. The rotating shaft 104 is fixed to the boss body 101, that is, the fan boss 100 by a fixing screw 105. The connection member 102 is fixed to the end plate 106 a of the cross flow fan 106. The anti-vibration member 103 is interposed between the boss body 101 and the connection member 102. The inner peripheral surface of the vibration isolation member 103 is fixed to the fixed surface 101 d of the boss main body 101.

  The driving force in the rotational direction of the rotating shaft 104 is transmitted to the cross flow fan 106 via the fan boss 100. The crossflow fan 106 rotates around the axis of the rotation shaft 104, so that air is blown.

JP 2003-286997 A

  In the case of the conventional fan boss 100, it is difficult to reduce the outer diameter D100 of the boss body 101. The reason is that the outer diameter D100 is determined to some extent from the following constraint conditions.

  That is, in order to firmly fix the rotating shaft 104, it is necessary to ensure a meshing margin between the screw portion 101c of the fixing screw insertion hole 101b and the screw portion 105c of the outer peripheral surface of the fixing screw 105. For this reason, it is necessary to secure a predetermined length or more of the hole length of the fixing screw insertion hole 101b, that is, the radial length R100 of the boss body 101. Further, the inner diameter D101 of the rotation shaft insertion hole 101a needs to be set to be equal to or larger than the outer diameter of the rotation shaft 104. For this reason, it is difficult to make the inner diameter D101 excessively small.

  Thus, the outer diameter D100 of the boss main body 101 is regulated by the radial length R100 of the boss main body and the inner diameter D101 of the rotary shaft insertion hole 101a. Therefore, it is difficult to reduce the outer diameter D100 of the boss body 101.

  In addition, the vibration isolation characteristics of the vibration isolation member 103 are tuned by adjusting the shape, radial length R101, axial length A100, and the like of the vibration isolation member 103. As described above, in the case of the conventional fan boss 100, it is difficult to reduce the outer diameter D100 of the boss body 101. In other words, it was difficult to reduce the inner diameter of the vibration isolation member 103. For this reason, it is difficult to tune the vibration isolation characteristics of the vibration isolation member 103.

  The fan boss of the present invention has been completed in view of the above problems. Accordingly, an object of the present invention is to provide a fan boss that can easily adjust the outer diameter of the boss body.

(1) In order to solve the above-described problem, the fan boss of the present invention includes a rotation shaft insertion hole that extends in the axial direction and through which the rotation shaft of the driving device is inserted, and a rotation that extends in the radial direction and the rotation outside the rotation direction. A boss main body having a fixing screw insertion hole through which a fixing screw for connecting the shaft insertion hole and a fixing screw for fixing the rotating shaft from the outside in the radial direction is inserted, and disposed radially outside the boss main body, A connecting member fixed to a fan that can rotate around the axis of the rotating shaft by a driving force in a rotating direction from the rotating shaft, and a vibration of the fan that is interposed between the boss body and the connecting member during rotation A fan boss comprising a vibration isolating member that suppresses vibration, wherein the boss body is made of metal and has a rotary shaft fixing portion having the rotary shaft insertion hole and the fixing screw insertion hole, and a resin. And the anti-vibration member arranged in an axial direction with respect to the fixing screw insertion hole A vibration isolating member fixing portion having a fixing surface to be constant, characterized by having.

  The boss body of the fan boss of the present invention separately includes a rotating shaft fixing portion that has a role of fixing the rotating shaft and a vibration isolating member fixing portion that has a role of fixing the vibration isolating member. The rotating shaft fixing portion includes a rotating shaft insertion hole and a fixing screw insertion hole. The rotation shaft of the driving device is fixed to the fan boss by the rotation shaft fixing portion. The vibration isolating member fixing portion includes a fixing surface. A vibration isolating member is fixed to the fixed surface.

  The fixing surface is arranged so as to be shifted in the axial direction with respect to the fixing screw insertion hole of the rotating shaft fixing portion. For this reason, the radial direction position of the fixing surface can be freely set without being affected by the hole length of the fixing screw insertion hole, that is, the radial length of the rotating shaft fixing portion. Therefore, it is easy to reduce the outer diameter of the fan. If the outer diameter of the fan is reduced, the material cost of the fan can be reduced accordingly.

  In addition, since the radial position of the fixed surface can be freely set, the degree of freedom in adjusting the shape, radial length, axial length, etc. of the vibration isolator increases. Therefore, it is easy to tune the vibration isolation characteristics of the vibration isolation member.

  Moreover, the rotating shaft fixing | fixed part of the boss | hub main body of the fan boss | hub of this invention is metal. For this reason, compared with the case where a rotating shaft fixing | fixed part is resin, a rotating shaft can be fixed firmly. On the other hand, the vibration isolator fixing portion of the boss body of the fan boss of the present invention is made of resin. For this reason, compared with the case where the vibration isolator fixing part is made of metal, it is easy to make the size and shape. Moreover, weight reduction is easy compared with the case where the vibration isolator fixing part is made of metal. For this reason, the power consumption of the drive device is reduced. Further, the material cost can be easily reduced as compared with the case where the vibration isolating member fixing portion is made of metal.

(2) Preferably, in the configuration of (1), the fixing screw insertion hole has an outer opening that opens to the outside in the radial direction, and the outer opening is arranged in the rotating shaft fixing portion. has a radial protrusion, the fixing surface, than the outer opening, it has good better to adopt a configuration which is disposed radially inwardly.

  The vibration isolation member has a driving force transmission function in addition to the vibration isolation function. That is, the vibration isolating member has a function of transmitting the driving force of the rotating shaft to the fan. For this reason, the vibration isolating member is required to have a predetermined strength. If the axial length of the vibration isolating member is excessively shortened, it is difficult to ensure a predetermined strength. Therefore, the axial length of the vibration isolating member cannot be made too short. That is, the degree of freedom in adjusting the axial length of the vibration isolating member is not inherently very high.

  In this regard, according to the present configuration, the fixed surface, that is, the inner peripheral surface of the vibration isolating member can be disposed radially inward from the outer opening. For this reason, the freedom degree of adjustment of the radial direction length of a vibration isolator becomes high. Therefore, the degree of freedom in adjusting the axial length can be compensated for by the high degree of freedom in adjusting the radial length.

  Further, when the fixed surface is disposed radially inward from the outer opening, the inner peripheral surface and the outer peripheral surface of the vibration isolation member can be disposed on the radially inner side accordingly. For this reason, it is easy to reduce the outer diameter of the connecting member, that is, the outer diameter of the fan.

(3) In the configuration of the above (1) or (2), the fan is not good is better to adopt a configuration which is a cross flow fan. The cross flow fan is used for an air conditioner for a general house. In recent years, air conditioners tend to be thinner. For this reason, the outer diameter of the cross flow fan also tends to be reduced.

  Further, the cross flow fan has a large number of parts and a long axial length. For this reason, the rotational balance is likely to go wrong. Therefore, in order to suppress the vibration of the cross flow fan, it is preferable that the degree of freedom in tuning of the vibration isolation characteristics is high.

  In this respect, according to the fan boss of the present invention, it is possible to sufficiently meet the demands for the above-mentioned reduction in diameter and tuning of vibration-proof characteristics. For this reason, the fan boss | hub of this invention is suitable for using for a cross flow fan.

  According to the present invention, it is possible to provide a fan boss that can easily adjust the outer diameter of the boss body.

It is a fragmentary perspective view of the cross flow fan in which the fan boss of one embodiment of the present invention was used. It is a permeation | transmission perspective view of the right end plate vicinity of the crossflow fan. It is an axial sectional view near the end plate. It is a perspective view of the same fan boss. It is a perspective view of the boss body of the fan boss. It is a perspective view of the rotating shaft fixing | fixed part of the boss body. It is a perspective view of the connecting member of the fan boss. It is sectional drawing of the metal mold | die used for a boss | hub main body manufacturing process. It is a layout view of a boss body and a connection member in a mold used in a vibration isolating member manufacturing process. It is an axial sectional view of a conventional fan boss.

  Hereinafter, an embodiment in which the fan boss of the present invention is embodied as a fan fan boss for a cross flow fan will be described.

<Configuration of cross flow fan>
First, the configuration of a cross flow fan using the fan boss of this embodiment will be briefly described. FIG. 1 is a partial perspective view of a cross flow fan in which the fan boss of this embodiment is used. The cross flow fan 9 is disposed inside an air conditioner (not shown). As shown by the white arrow in FIG. 1, the cross flow fan 9 blows out air sucked in from above. The cross flow fan 9 can ensure a flat and substantially uniform air flow.

  The cross flow fan 9 includes a pair of left and right end plates 90, a large number of partition plates 91, and a large number of blades 92. A motor housing 93 is disposed on the right side of the cross flow fan 9. The motor housing 93 accommodates a motor 930 and a rotating shaft 931 as indicated by dotted lines in FIG. The motor 930 is included in the driving device of the present invention.

  The end plate 90 is made of ASGF20 (acrylonitrile-styrene copolymer containing 100% by mass of glass fiber and 20% by mass of glass fiber), and has a disk shape. The left end plate (not shown) is rotatably supported by the housing of the air conditioner. The fan boss 1 is fixed to the right end plate 90.

  The many partition plates 91 are made of ASGF20 and have a disk shape. A large number of partition plates 91 are arranged at a predetermined interval between a pair of left and right end plates 90. The many blades 92 are made of ASGF20 and have a thin plate shape. The many blades 92 are installed between the partition plates 91 adjacent to each other and between the partition plates 91 and the end plates 90 adjacent to each other. The blades 92 are disposed in the vicinity of the peripheral edges of the partition plate 91 and the end plate 90.

  A unit U1 is configured by the partition plate 91 and a large number of blades 92 connected to the partition plate 91. The cross flow fan 9 is manufactured by ultrasonic welding the plurality of units U1 in the axial direction (left-right direction).

<Fan boss configuration>
Next, the configuration of the fan boss 1 of this embodiment will be described. FIG. 2 shows a transparent perspective view near the right end plate of the cross flow fan. FIG. 3 shows an axial sectional view near the end plate. In FIG. 2, the transmission part is indicated by a thin line. The fan boss 1 is fixed to an end plate 90 of the cross flow fan 9 as shown in FIGS. A method for fixing the fan boss 1 to the end plate 90 will be described in detail later.

  In FIG. 4, the perspective view of the fan boss | hub of this embodiment is shown. FIG. 5 shows a perspective view of the boss body of the fan boss of this embodiment. FIG. 6 shows a perspective view of the rotating shaft fixing portion of the boss body. FIG. 7 shows a perspective view of the connecting member of the fan boss. As shown in FIGS. 4 to 7, the fan boss 1 includes a boss body 2, a connection member 3, and a vibration isolation member 4.

(Boss body)
As shown in FIG. 5, the boss body 2 includes a rotating shaft fixing portion 20 and a vibration isolation member fixing portion 21. The rotating shaft fixing part 20 is made of an aluminum alloy. As shown in FIG. 6, the rotating shaft fixing portion 20 includes a fixing portion main body 200 and a radial convex portion 201. The fixed portion main body 200 has a cylindrical shape. That is, the fixed portion main body 200 includes a rotation shaft insertion hole 202 that penetrates in the left-right direction. As shown in FIG. 3, the rotation shaft 931 is inserted through the rotation shaft insertion hole 202. Returning to FIG. 6, the radial protrusion 201 protrudes outward in the radial direction from a part of the fixed body 200 in the circumferential direction. The top surface 201 a of the radial convex portion 201 and the substantially central portion in the axial direction (left-right direction) of the rotary shaft insertion hole 202 are communicated with each other through a fixing screw insertion hole 203. That is, the outer opening 203a of the fixing screw insertion hole 203 is formed in the top surface 201a. On the other hand, the inner opening 203 b of the fixing screw insertion hole 203 is opened on the inner peripheral surface of the rotation shaft insertion hole 202. A spiral screw portion 203 c is formed on the inner peripheral surface of the fixing screw insertion hole 203. As shown in FIG. 3, a fixing screw 94 is inserted into the fixing screw insertion hole 203. A spiral screw portion 94 c is formed on the outer peripheral surface of the fixing screw 94. The screw portion 94c of the fixing screw 94 and the screw portion 203c of the fixing screw insertion hole 203 mesh with each other. The tip of the fixing screw 94 is in pressure contact with the outer peripheral surface of the rotating shaft 931 through the inner opening 203b. When the fixing screw 94 is in pressure contact with the rotating shaft 931, the boss body 2, that is, the fan boss 1 is firmly fixed to the rotating shaft 931.

  The anti-vibration member fixing portion 21 is made of PA (polyamide) 66 mixed with glass fiber. As shown in FIG. 5, the vibration isolation member fixing portion 21 has a cylindrical shape. That is, the vibration isolation member fixing portion 21 includes a through hole 210 that penetrates in the left-right direction. In addition, a fixed surface 211 is disposed on the right side portion of the outer peripheral surface of the vibration isolation member fixing portion 21 as shown by dotted line hatching in FIG. The fixed surface 211 extends in the circumferential direction. As shown in FIG. 3, the vibration isolating member 4 is fixed to the fixed surface 211. As shown by a dotted line in FIG. 5, the rotating shaft fixing portion 20 is embedded in the left side portion (the portion where the fixing surface 211 is not disposed) of the vibration isolation member fixing portion 21. As shown in FIG. 3, the rotation shaft insertion hole 202 of the rotation shaft fixing portion 20 has a smaller diameter than the through hole 210 of the vibration isolation member fixing portion 21. Further, the hole axis of the rotary shaft insertion hole 202 and the hole axis of the through hole 210 are substantially coincident with each other. For this reason, the inner peripheral surface of the rotation shaft insertion hole 202 is disposed radially inward from the inner peripheral surface of the through hole 210. Further, the radial convex portion 201 of the rotating shaft fixing portion 20 protrudes outward in the radial direction from the outer peripheral surface of the vibration-proof member fixing portion 21. For this reason, the top surface 201 a is disposed on the radially outer side than the fixed surface 211.

(Anti-vibration member)
The vibration isolation member 4 is made of rubber (a vulcanized product of a rubber composition described later). As shown in FIGS. 2 and 3, the vibration isolation member 4 has a ring shape. The inner peripheral surface 40 of the vibration isolation member 4 is fixed to the fixed surface 211. The outer peripheral surface 41 of the vibration isolation member 4 is fixed to the fixing hole 900 of the end plate 90.

(Connecting member)
The connecting member 3 is made of SPCC. As shown in FIG. 7, the connection member 3 has a ring shape. The connecting member 3 has six inner through holes 30 and six outer through holes 31. The six inner through holes 30 are arranged in the circumferential direction. The six outer through holes 31 are arranged in the circumferential direction. The outer through hole 31 is disposed on the radially outer side of the inner through hole 30. As shown in FIGS. 2 and 3, the connection member 3 is embedded in the vibration isolation member 4 and the end plate 90. The inner through hole 30 is embedded on the vibration isolation member 4 side. The outer through hole 31 is embedded on the end plate 90 side. The connection member 3 connects the outer peripheral surface 41 of the vibration isolating member 4 and the inner peripheral surface of the fixing hole 900 of the end plate 90.

<Manufacturing method of fan boss>
Next, a method for manufacturing the fan boss 1 of this embodiment will be described. The manufacturing method of the fan boss 1 of the present embodiment includes a boss main body manufacturing step, a connection member manufacturing step, and a vibration isolating member manufacturing step.

  In the boss body manufacturing process, first, the rotating shaft fixing portion 20 shown in FIG. 6 is manufactured. That is, the rotating shaft fixing part 20 is produced by extruding an aluminum alloy tube and forming the fixing screw insertion hole 203 in the molded product. Next, the vibration isolation member fixing portion 21 is produced around the rotating shaft fixing portion 20 by insert molding.

  FIG. 8 shows a cross-sectional view of a mold used in the boss body manufacturing process. As shown in FIG. 8, the mold 8 includes a fixed mold 80 and a movable mold 81. A cavity 82 is defined between the fixed mold 80 and the movable mold 81. The gate 83 is open at the end of the cavity 82. The rotary shaft fixing portion 20 is fixed to a predetermined position of the mold 8 by a pin (not shown) inserted from the movable mold 81 side.

  After mold clamping, a liquid PA66 resin 7 containing 50% by mass of glass fiber with a total amount of 100% by mass is injected into the cavity 82 from the nozzle (not shown) of the injection molding machine through the gate 83. By curing the PA66 resin 7 in the cavity 82, the vibration isolating member fixing portion 21 is formed around the rotating shaft fixing portion 20, as shown in FIG. In this way, the boss body 2 is produced.

  In the connecting member manufacturing step, the connecting member 3 is manufactured by punching a plate material made of SPCC.

  In the vibration isolation member manufacturing step, first, the boss body 2 and the connection member 3 are arranged at predetermined positions of the mold. FIG. 9 shows a layout view of the boss body and the connection member in the mold used in the vibration isolating member manufacturing process. As shown in FIG. 9, in this step, the boss body 2 and the connection member 3 are arranged in a substantially concentric circle shape. Further, the connecting member 3 is disposed on the radially outer side of the fixed surface 211 of the boss body 2. As indicated by a one-dot chain line in FIG. 9, the cavity 84 is partitioned between the outer peripheral surface of the fixed surface 211 and the radially inner half portion of the connection member 3. The inner through hole 30 is exposed inside the cavity 84.

  After mold clamping, a liquid rubber composition is injected into the cavity 84. By vulcanizing the rubber composition in the cavity 84, the vibration isolating member 4 is produced between the boss body 2 and the connection member 3 as shown in FIG. 4. In this way, the fan boss 1 of this embodiment is manufactured.

<Fan boss fixing method>
Next, a method for fixing the fan boss 1 to the end plate 90 according to the present embodiment will be described with reference to FIG. The fan boss 1 is fixed to the right end plate 90 by insert molding. That is, first, the fan boss 1 is placed in the cavity (not shown) of the mold. At this time, the outer through hole 31 is exposed inside the cavity. After mold clamping, liquid ASGF 20 is injected into the cavity. The end plate 90 is formed around the connection member 3 of the fan boss 1 by curing the ASGF 20 in the cavity. Thereafter, as shown in FIG. 1, a predetermined number of units U1 are connected to the end plate 90 by ultrasonic welding, and the left end plate is connected to the unit U1 at the left end of the connection. Is made.

<Effect>
Next, the effect of the fan boss 1 of this embodiment is demonstrated. As shown in FIG. 3, according to the fan boss 1 of the present embodiment, the fixing surface 211 is arranged so as to be shifted in the axial direction with respect to the fixing screw insertion hole 203. For this reason, the hole length of the screw portion 203c arrangement portion of the fixing screw insertion hole 203, that is, the radial length R1 of the rotating shaft fixing portion 20 (specifically, the radial length of the fixing portion main body 200 and the radial protrusion 201) The radial position of the fixed surface 211 can be freely set without being affected by the sum of the radial length). For this reason, the freedom degree of adjustment, such as the shape of the vibration isolator 4 and radial direction length R2, axial direction length A1, becomes high. Therefore, it is easy to tune the vibration isolation characteristics of the vibration isolation member 4.

  For example, by increasing the radial length R2 of the vibration isolation member 4, low frequency vibrations can be suppressed. Further, by reducing the radial length R2 of the vibration isolation member 4, high frequency vibration can be suppressed. In addition, by increasing the axial length A1 of the vibration isolation member 4, high-frequency vibration can be suppressed. Further, by reducing the axial length A1 of the vibration isolating member 4, low frequency vibration can be suppressed.

  Moreover, the rotating shaft fixing | fixed part 20 of the boss | hub main body 2 of the fan boss | hub 1 of this embodiment is a product made from an aluminum alloy. For this reason, compared with the case where the rotating shaft fixing | fixed part 20 is resin, the rotating shaft 931 can be fixed firmly. On the other hand, the vibration-proof member fixing portion 21 of the boss body 2 is made of PA66 resin 7 in which glass fibers are blended. As shown in FIG. 8, the vibration isolation member fixing portion 21 is manufactured by injection molding in the boss body manufacturing process. For this reason, the size and shape can be easily created by changing the cavity 82. Moreover, weight reduction is easy compared with the case where the vibration isolator fixing | fixed part 21 is metal. For this reason, the power consumption of the motor 930 is reduced. Further, the material cost can be easily reduced as compared with the case where the vibration isolation member fixing portion 21 is made of metal.

  Further, as shown in FIG. 3, according to the fan boss 1 of the present embodiment, the fixed surface 211, that is, the inner peripheral surface 40 of the vibration isolation member 4, is radially inward from the top surface 201 a of the radial protrusion 201. Can be arranged. For this reason, the freedom degree of adjustment of radial direction length R2 of the vibration isolator 4 becomes high. Therefore, it is possible to compensate for the fact that the degree of freedom of adjustment of the axial length A1 is not so high by the degree of freedom of adjustment of the radial length R2.

  Further, when the fixed surface 211 is disposed radially inward of the top surface 201a, the inner peripheral surface 40 and the outer peripheral surface 41 of the vibration isolation member 4 can be disposed on the radially inner side accordingly. For this reason, it is easy to reduce the outer diameter of the connecting member 3, that is, the outer diameter of the end plate 90.

  As shown in FIG. 9, the connecting member 3 is provided with an inner through hole 30 and an outer through hole 31. In the vibration isolating member manufacturing process, the liquid rubber composition is filled up to the inner through hole 30. For this reason, the anti-vibration member 4 and the connection member 3 can be firmly connected by the anchoring effect. Further, when the fan boss 1 is fixed to the end plate 90, the liquid ASGF 20 is filled up to the outer through hole 31. For this reason, the connection member 3 and the end plate 90 can be firmly connected by the anchoring effect.

  Further, the rubber composition for the vibration isolator 4 of the fan boss 1 of this embodiment includes (A) a diene rubber or a rubber having a methylene group, (B) a vulcanizing agent, (C) a resorcinol compound, (D ) A melamine-based resin, and (E) liquid polybutadiene having 1,2-vinyl content of 55 to 90% by weight. That is, the rubber composition contains adhesive components such as (C) a resorcinol compound and (D) a melamine resin. For this reason, it is not necessary to apply an adhesive to the fixing surface 211 and the connecting member 3 before the vibration isolating member manufacturing step.

<Others>
The embodiment of the fan boss of the present invention has been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  For example, in the above embodiment, as shown in FIG. 7, the connecting member 3 has a ring shape, but may have a cylindrical shape. Moreover, you may give uneven | corrugated shape to the internal peripheral surface of the connection member 3, the fixing surface 211, the outer peripheral surface of the fixing | fixed part main body 200, etc. FIG. In this way, the bonding area can be increased. Moreover, even if the driving force of the rotating shaft 931 is applied, the adhesion interface is difficult to peel off.

  Moreover, in the said embodiment, as shown in FIG. 9, in the vibration isolator preparation process, a liquid rubber composition is inject | poured into the cavity 84 and this rubber composition is vulcanized | cured, so that the vibration isolator 4 Was made. However, first, a preformed body of the vibration isolating member 4 made of a rubber composition is prepared, and then this preformed body is placed in the cavity 84, and finally the preformed body is vulcanized, whereby the vibration isolating member 4 is It may be produced.

  Moreover, in the said embodiment, the connection member 3 was produced by stamping the board | plate material made from SPCC in the case of a connection member production process. However, the connecting member 3 may be a resin injection molded product. That is, the connecting member 3 may be manufactured using a mold such as the mold 8 shown in FIG.

  Moreover, in the said embodiment, although the rotating shaft fixing | fixed part 20 was made from the aluminum alloy, it is good also as a product made from aluminum, brass, stainless steel, iron, titanium, magnesium.

  Moreover, in the said embodiment, although the anti-vibration member fixing | fixed part 21 was made from PA66 resin 7 with which glass fiber was mix | blended, you may use another polyamide instead of PA66. For example, PA6, PA610, PA612, PA11, PA12, PA46, a copolymer of PA6 and PA66, aromatic PA, amorphous PA, or the like may be used. Moreover, you may use another filler instead of glass fiber. For example, carbon fiber, metal fiber, whisker, clay mineral or the like may be used.

  In the above embodiment, the connection member 3 is made of SPCC, but may be made of aluminum, stainless steel, titanium, magnesium, brass, or the like. Further, the connecting member 3 may be made of resin for the vibration isolating member fixing portion 21.

  Moreover, in the said embodiment, the vibration isolator 4 was made from the vulcanizate of the rubber composition containing said (A)-(E). The components, content, preparation method, vulcanization method at the time of vulcanization, and the like of the rubber composition in the above-described embodiment are described in JP-A-2008-196385 and JP-A-2008-196386. The same as in the case of the rubber composition.

  Examples of the diene rubber (A) include ethylene-propylene-diene rubber (EPDM), natural rubber (NR), butadiene rubber (BR), styrene-butadiene rubber (SBR), isoprene rubber (IR), and acrylonitrile-butadiene. Rubber (NBR), chloroprene rubber (CR), butyl rubber (IIR), chlorinated butyl rubber (Cl-IIR), brominated butyl rubber (Br-IIR) and the like can be used.

  Examples of the rubber having a methylene group (A) include EPDM, ethylene-propylene rubber (EPM), hydrogenated acrylonitrile-butadiene rubber (H-NBR), acrylic rubber (ACM), and hydrin rubber (ECO, CO). Urethane rubber, hydrogenated styrene-butadiene rubber (H-SBR), silicone rubber (Q), vinyl group-containing silicone rubber (VMQ), fluorosilicone rubber (FVMQ), fluorine rubber (FKM), and the like can be used.

  Moreover, as (B), sulfur type vulcanizing agents, such as sulfur and sulfur chloride, can be used, for example. 2,4-dichlorobenzoyl peroxide, benzoyl peroxide, 1,1-di-t-butylperoxy-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-dibenzoylperoxyhexane, n- Butyl-4,4'-di-t-butylperoxyvalerate, dicumyl peroxide, t-butylperoxybenzoate, di-t-butylperoxy-diisopropylbenzene, t-butylcumyl peroxide, 2,5-dimethyl- 2,5-di-t-butylperoxyhexane, di-t-butylperoxide, 2,5-dimethyl-2,5-di-t-butylperoxyhexyne-3,1,3bis- (t-butyl Peroxide vulcanizing agents such as peroxy-iso-propyl) benzene can be used.

  As (C), for example, modified resorcin / formaldehyde resin, resorcin, resorcin / formaldehyde (RF) resin, and the like can be used. These may be used alone or in combination of two or more.

  As (D), for example, methylated formaldehyde / melamine polymer, hexamethylenetetramine and the like can be used. These may be used alone or in combination of two or more.

  In addition, as (E), for example, liquids such as epoxy-modified polybutadiene, epoxy resin-modified polybutadiene, acrylic acid-modified polybutadiene, methacrylic acid-modified polybutadiene, maleic acid-modified polybutadiene, and urethane-modified polybutadiene, or these are further modified (For example, an aminated product of liquid epoxy-modified polybutadiene) and the like can be used. These may be used alone or in combination of two or more.

  Moreover, as a rubber composition, you may use the rubber composition as described in Unexamined-Japanese-Patent No. 2007-71123 and Unexamined-Japanese-Patent No. 2007-71124. Moreover, you may use the rubber composition which does not contain an adhesive component other than the said rubber composition.

  Moreover, in the said embodiment, although the fan boss 1 of this invention was used for the cross flow fan 9, the fan boss 1 of this invention is used for all fans, such as a sirocco fan, a turbo fan, a blower fan, and a propeller fan. Can do.

1: fan boss, 2: boss body, 3: connection member, 4: vibration isolating member, 7: PA66 resin, 8: mold, 9: cross flow fan.
20: Rotating shaft fixing part, 21: Anti-vibration member fixing part, 30: Inner through hole, 31: Outer through hole, 40: Inner peripheral surface, 41: Outer peripheral surface, 80: Fixed type, 81: Movable type, 82: Cavity, 83: Gate, 84: Cavity, 90: End plate, 91: Partition plate, 92: Blade, 93: Motor housing, 94: Fixing screw, 94c: Screw part.
200: fixing portion main body, 201: radial convex portion, 201a: top surface, 202: rotating shaft insertion hole, 203: fixing screw insertion hole, 203a: outer opening portion, 203b: inner opening portion, 203c: screw portion, 210 : Through hole, 211: fixed surface, 900: fixed hole, 930: motor (drive device), 931: rotating shaft.
A1: axial length, R1: radial length, R2: radial length, U1: unit.

Claims (5)

A rotation shaft insertion hole extending in the axial direction and through which the rotation shaft of the drive device is inserted, and a radial extension extending in the radial direction and the rotation shaft insertion hole are connected to fix the rotation shaft from the outside in the radial direction. A boss body having a fixing screw insertion hole through which a fixing screw for insertion is inserted,
A connecting member that is disposed on the radially outer side of the boss body, and is fixed to a fan that is rotatable around the axis of the rotating shaft by a driving force in the rotating direction from the rotating shaft;
An anti-vibration member interposed between the boss body and the connection member to suppress vibration of the fan during rotation;
A fan boss with
The boss body is made of metal and has a rotary shaft fixing portion having the rotary shaft insertion hole and the fixing screw insertion hole, and is made of resin and is offset in the axial direction with respect to the fixing screw insertion hole. have a, a vibration isolating member fixing portion having a fixing surface of the vibration-proof member is fixed,
The fan boss characterized in that the fixed surface is arranged offset in the axial direction with respect to the rotating shaft fixing portion .   The fan boss according to claim 1, wherein the rotation shaft fixing portion is embedded in a portion of the vibration isolation member fixing portion where the fixing surface is not disposed.   The fixing screw insertion hole has an outer opening that opens to the outside in the radial direction,
  The rotating shaft fixing portion has a radial convex portion in which the outer opening is disposed,
  The fan boss according to claim 1, wherein the fixing surface is disposed radially inward of the outer opening.   The fan has an end plate having a fixing hole,
  The connection member connects the outer peripheral surface of the vibration isolation member and the inner peripheral surface of the fixed hole, and includes an inner through hole filled with a part of the vibration isolation member, and the inner through hole The fan boss according to any one of claims 1 to 3, further comprising an outer through hole that is disposed radially outside and is filled with a part of the end plate.   The fan boss according to any one of claims 1 to 4, wherein the fan is a cross flow fan.

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