JP2018204573A - Buffer member and blower device having buffer member - Google Patents

Abstract

To provide a buffer member which can suppress the transmission of the vibration of a motor device to a case, and a blower device having the buffer member.SOLUTION: A buffer member 3 is interposed between a case 5 for accommodating a blower fan 6 and a motor device 2 for rotationally driving the blower fan 6. The buffer member 3 is an elastically-deformable cylindrical body. The buffer member 3 connects the case 5 and the motor device 2 together with a screw 4 whose shaft part 42 is inserted into and fixed to the case 5. The buffer member 3 comprises portions of the cylindrical body at both sides in an axial direction being support portions 31, 32 which indirectly contact with the shaft part 42 in an i-state that the shaft part 42 is inserted. The buffer member 3 comprises a portion of the cylindrical body between the support portions 31, 32 in the axial direction being an intermediate portion 33 which is larger than the support portions 31, 32 in a diameter. The intermediate portion 33 includes an external peripheral groove part 34 which is separated from the shaft part 42, contacts with the motor device 2 at an external peripheral part, and supports the motor device 2.SELECTED DRAWING: Figure 4

Description

  The disclosure in this specification relates to a buffer member and a blower device including the buffer member.

  Patent Literature 1 discloses a blower device that includes a case and an electric motor that is a motor device attached to the case. This electric motor is attached by fixing a flange portion provided on the outer periphery to the case with a bolt. A rubber cylinder is interposed between the flange portion and the bolt. According to the drawing of Patent Document 1, the entire inner peripheral surface of the rubber cylinder is indirectly in contact with the bolt via the collar. The rubber cylinder can absorb the vibration of the electric motor transmitted from the flange portion to the bolt to some extent.

Japanese Utility Model Publication No. 50-35473

  In the technique of Patent Document 1, since the entire inner peripheral surface of the rubber cylinder is in contact with the collar, the vibration transmitted from the flange portion to the rubber cylinder is directly from the entire inner peripheral surface via the collar portion. Is transmitted to the bolt. This vibration is transmitted to the case through the bolt, causing noise. Therefore, the technique of Patent Document 1 has room for improvement with respect to the suppression of the vibration of the motor device being transmitted to the case.

  The disclosed object is to provide a shock absorbing member capable of suppressing the vibration of the motor device from being transmitted to the case, and a blower device including the shock absorbing member.

  A plurality of aspects disclosed in this specification adopt different technical means to achieve each purpose. In addition, the reference numerals in the parentheses described in the claims and in this section are examples showing the correspondence with the specific means described in the embodiments described later as one aspect, and limit the technical scope. is not.

  One of the disclosed buffer members is provided between a case (5) that houses the blower fan (6) and a motor device (2) that rotationally drives the blower fan, and is a cylindrical shape that can be elastically deformed. And a buffer member that connects the case and the motor device together with a fixture (4) in which the shaft portion (42) is inserted and fixed in the case, and both sides of the cylindrical body in the axial direction. Between the support portions (31, 32) that directly or indirectly contact the shaft portion with the shaft portion inserted, and the support portions in the axial direction of the cylindrical body. An intermediate portion (33) having an inner diameter larger than that of the support portion, and the intermediate portion includes a contact portion (34) spaced from the shaft portion and contacting the motor device at the outer peripheral portion to support the motor device.

  According to this disclosure, the intermediate portion of the buffer member is separated from the shaft portion. For this reason, the intermediate part can absorb the vibration transmitted from the motor device to the contact part by elastic deformation while suppressing the direct transmission from the inner peripheral part to the shaft part. Thereby, the vibration transmitted from the motor device to the shaft portion via the buffer member can be suppressed, and hence the vibration transmitted from the shaft portion to the case can be suppressed. As described above, it is possible to provide a buffer member capable of suppressing the vibration of the motor device from being transmitted to the case.

  One of the disclosed blower devices includes a blower fan (6), a case (5) that houses the blower fan, a motor device (2) that rotationally drives the blower fan, and a shaft ( 342), an elastically deformable cylindrical body that is interposed between the case and the motor device and is inserted between the case and the motor device, and the case and the motor device together with the fixture. And a buffer member (303) having a contact portion (334) that contacts and supports the motor device, and the shaft portion of the insertion portion (342a) that is a portion inserted through the buffer member It is a part between the outer peripheral contact parts (342b, 342d) which are the parts on both sides in the axial direction and whose outer peripheral part is in contact with the inner peripheral part of the buffer member, and the outer peripheral contact parts in the axial direction. The inner diameter of the cushioning member is small. A small-diameter intermediate portion is spaced from the part and (342c), the small-diameter intermediate portion is formed in a range including the contact portion of the buffer member in the axial direction.

  According to this disclosure, the small-diameter intermediate portion of the shaft portion is separated from the inner peripheral portion of the buffer member. For this reason, the vibration transmitted from the motor device to the contact portion in the buffer member can be absorbed by elastic deformation while suppressing the direct transmission from the portion facing the small-diameter intermediate portion to the shaft portion. Thereby, the vibration transmitted from the motor device to the shaft portion via the buffer member is suppressed, and hence the vibration transmitted from the shaft portion to the case is suppressed. With the above, it is possible to provide a blower capable of suppressing the vibration of the motor device from being transmitted to the case.

It is a figure which shows the external appearance of the air blower which concerns on 1st Embodiment. It is an enlarged view of FIG. FIG. 3 is a view in the direction of arrow III in FIG. 2. It is a figure which shows the IV-IV cross section of FIG. It is the figure which looked at the buffer member attached to the air blower from the axial direction. It is sectional drawing of a buffer member. It is a figure which shows the cross section of the air blower which concerns on 2nd Embodiment. It is a figure which shows the cross section of the air blower which concerns on 3rd Embodiment.

(First embodiment)
The air blower 1 and the buffer member 3 of 1st Embodiment are demonstrated using FIGS. The blower device 1 includes a blower fan 6, a case 5, a motor device 2, a screw 4 that fixes the case 5 and the motor device 2, and a buffer member 3. The blower 1 is applied to, for example, a vehicle air conditioner. The blower fan 6 is a cross flow fan, for example, and has a shape that is long in the direction of the rotation axis. The blower fan 6 is rotatably held by the case 5. The blower fan 6 is connected to the motor shaft of the motor body and is rotated by the motor body.

  The case 5 includes a fan housing portion that houses and holds the blower fan 6 and a motor coupling portion 51 to which the motor device 2 is coupled. The case 5 is made of, for example, a resin material. The case 5 has a shape that is long in the direction of the rotation axis of the blower fan 6. As shown in FIG. 2, the motor connecting portion 51 is provided at one end of the case 5 in the rotation axis direction. That is, the motor device 2 is attached to the end portion of the case 5 in the rotation axis direction. The motor connecting portion 51 is formed with a hole portion into which the screw 4 is inserted.

  The motor device 2 includes a motor body that rotationally drives the blower fan 6 and a motor cover 20 that holds the motor body. The motor body includes, for example, a motor shaft portion connected to the blower fan 6, a rotor coupled to the motor shaft portion, and a stator that is disposed to face the rotor in the radial direction. The motor main body has a bottomed cylindrical motor housing that houses the rotor and the stator therein. The motor main body transmits the rotation of the rotor from the motor shaft portion to the blower fan 6 to rotationally drive the blower fan 6.

  The motor cover 20 includes a housing portion 21 that houses the motor main body, and a flange portion 22 provided in the housing portion 21. The motor cover 20 is made of resin, for example. The accommodating portion 21 has a bottomed cylindrical shape. The accommodating portion 21 holds the motor main body therein. The flange portion 22 is provided so as to extend outward from the outer peripheral surface of the housing portion 21. The flange portion 22 is formed to extend in a rectangular plate shape, for example. A plurality of flange portions 22, for example, four as shown in FIG. 3, are provided in the circumferential direction at predetermined intervals.

  The flange portion 22 has a notch 22a. The notch 22a is formed, for example, in a substantially U shape at the radially outer edge of the flange 22. The buffer member 3 is fitted into the notch 22a. The shaft part 42 of the screw 4 is inserted through the notch 22a through the buffer member 3. The flange portion 22 is fixed to the case 5 by the screw 4 via the buffer member 3. The flange portion 22 is an attachment portion that is coupled to the case 5 via the buffer member 3 and the screw 4 when the motor device 2 is attached to the case 5.

  The screw 4 is a fixing tool for fixing the motor device 2 to the case 5. The screw 4 includes, for example, a shaft portion 42 that is inserted through the notch portion 22a and a head portion 41 that is formed at one end of the shaft portion 42 in the axial direction. The shaft portion 42 is formed with a male screw. The shaft portion 42 is inserted through the cutout portion 22a via the buffer member 3. As for the screw 4, the edge part on the opposite side to the head 41 in the axial part 42 is inserted in the case 5. As shown in FIG. The axial direction of the shaft portion 42 is a direction substantially parallel to the rotational axis direction of the blower fan 6. The screw 4 is a so-called tapping screw that is fastened by inserting the shaft portion 42 while forming a female screw in the case 5 with a male screw.

  A washer 45 is provided between the head 41 and the buffer member 3. The washer 45 is a disc-shaped washer in which a hole portion through which the shaft portion 42 is inserted is formed. The washer 45 is sandwiched between the head 41 and the buffer member 3 in a state where the screw 4 is fastened.

  The collar portion 46 is formed in a cylindrical shape surrounding the shaft portion 42 of the screw 4. The collar portion 46 is a cylindrical body that is fitted to the outside of the shaft portion 42. The collar portion 46 is disposed inside the buffer member 3. The shaft portion 42 of the screw 4 is inserted through the collar portion 46. The collar portion 46 is in direct contact with the shaft portion 42. The collar portion 46 is formed of a metal such as iron or aluminum, or a hard resin, for example. The collar portion 46 defines the amount of compression in the axial direction of the buffer member 3 when the screw 4 is fastened.

  Next, details of the buffer member 3 will be described with reference to FIGS. FIG. 6 shows the buffer member 3 before being attached to the blower 1. That is, the buffer member 3 is not elastically deformed by an external force.

  The buffer member 3 is an elastic member integrally formed of an elastic material, for example, an elastomer material such as rubber. The buffer member 3 is formed in a substantially cylindrical shape extending in the axial direction parallel to the axial direction of the screw 4. That is, the axial direction of the buffer member 3 is the same as the axial direction of the screw 4. The buffer member 3 and the screw 4 are substantially coaxial. For this reason, in the following, when there is no need to particularly distinguish the axial direction of the buffer member 3 and the axial direction of the shaft portion 42, both are simply referred to as the axial direction. In the following, a direction orthogonal to the axial direction is referred to as an orthogonal direction. The axial direction of the buffer member 3 corresponds to the axial direction in the claims. The buffer member 3 is formed with an outer peripheral groove portion 34 and an inner peripheral groove portion 35.

  The outer circumferential groove 34 is a groove formed on the outer circumferential surface of the buffer member 3. The outer peripheral groove 34 is formed, for example, on the entire outer peripheral surface. In addition, an outer peripheral surface can also be called an outer peripheral part. The outer peripheral groove 34 is formed at the center of the intermediate portion 33 in the axial direction, for example. The outer peripheral groove portion 34 is a groove portion into which a portion forming the notch portion 22a of the flange portion 22 is fitted. That is, the outer peripheral groove 34 is a contact portion that comes into contact with the flange portion 22. The outer circumferential groove portion 34 is in contact with the flange portion 22 and supports the motor device 2.

  Since the outer peripheral groove portion 34 is formed in the intermediate portion 33, the portion of the inner peripheral surface that faces the outer peripheral groove portion 34 in the direction orthogonal to the buffer member 3 is included in the range where the inner peripheral groove portion 35 is formed. be able to. Hereinafter, the portion of the inner peripheral surface is referred to as a facing portion 35a. In addition, an inner peripheral surface can also be called an inner peripheral part. The facing portion 35 a is a portion of the inner peripheral surface that faces the outer circumferential groove portion 34 in the radial direction in the intermediate portion 33, and the range in the axial direction is the same as the range in the axial direction of the outer circumferential groove portion 34. That is, the opposed portion 35a is a region sandwiched between two dash-dot lines on the inner peripheral surface of the buffer member 3 in FIG. It can be said that the facing portion 35a is a region obtained by projecting the outer circumferential groove portion 34 in the orthogonal direction. The facing portion 35 a is separated from the collar portion 46.

  The outer peripheral groove part 34 is provided in order to suppress the relative position in the axial direction of the buffer member 3 and the flange part 22 from shifting due to the flange part 22 being fitted. Therefore, it is desirable that the outer circumferential groove 34 is substantially equal to the width of the flange 22 into which the axial width fits, and has a certain depth so that the flange 22 does not shift in the axial direction. Is desirable.

  The inner circumferential groove portion 35 is a groove portion formed on the inner circumferential surface of the buffer member 3. It can also be said that the inner circumferential groove portion 35 is a concave portion formed on the inner circumferential surface of the buffer member 3. The inner circumferential groove portion 35 is formed on the entire circumference of the inner circumferential surface of the buffer member 3. The inner circumferential groove portion 35 is provided, for example, in the approximate center of the buffer member 3 in the axial direction. The width dimension in the axial direction of the inner circumferential groove portion 35 is provided so as to be at least larger than the width dimension of the outer circumferential groove portion 34. The inner circumferential groove portion 35 includes a facing portion 35a. The outer peripheral groove portion 34 is provided in the axial range where the inner peripheral groove portion 35 is formed. Due to the inner circumferential groove portion 35, the buffer member 3 has a small inner diameter at both sides in the axial direction and a large inner diameter at the center in the axial direction. The portions on both sides in the axial direction of the buffer member 3 are referred to as a support portion 31 and a support portion 32. Further, a substantially central portion in the axial direction is referred to as an intermediate portion 33.

  The support portions 31 and 32 are portions that come into contact with the outer peripheral surface of the collar portion 46 when attached to the blower 1. Accordingly, the support portions 31 and 32 are in contact with the shaft portion 42 via the collar portion 46. Each of the support portions 31 and 32 is a portion between the end portion in the axial direction and the inner circumferential groove portion 35 of the buffer member 3. The intermediate portion 33 is a portion between the support portion 31 and the support portion 32 in the axial direction and connects the support portions 31 and 32 in the axial direction. In other words, the intermediate portion 33 is connected to the support portions 31 and 32 at both ends in the axial direction.

  The intermediate portion 33 is a range in which the inner peripheral groove portion 35 is formed in the axial direction of the buffer member 3. That is, it can be said that the inner peripheral surface of the intermediate portion 33 is positioned more radially outward than the inner peripheral surfaces of the support portions 31 and 32. The intermediate portion 33 includes an outer peripheral groove portion 34 on the outer peripheral surface. That is, the outer peripheral surface of the intermediate portion 33 includes an outer peripheral groove portion 34 with the flange portion 22. The intermediate portion 33 is a portion between two dotted lines in the buffer member 3 of FIG. Further, the outer peripheral surfaces of the support portions 31 and 32 are not in contact with the flange portion 22.

  The buffer member 3 is fixed to the motor connecting portion 51 of the case 5 by the screw 4 while being fitted into the notch 22 a of the flange portion 22. At this time, as shown in FIGS. 4 and 5, the end portion of the flange portion 22 forming the notch portion 22 a is fitted into the outer peripheral groove portion 34 of the buffer member 3. The buffer member 3 is sandwiched between the washer 45 and the motor connecting portion 51 of the case 5 by the fastening of the screw 4 and is compressed in the axial direction. The buffer member 3 is compressed to the same length as the axial direction of the collar portion 46. In the buffer member 3, the inner peripheral surfaces of the support portions 31 and 32 are in contact with the outer peripheral surface of the collar portion 46, and the inner peripheral surface of the intermediate portion 33 is separated from the outer peripheral surface of the collar portion 46. In other words, the portion of the inner peripheral surface of the buffer member 3 where the inner peripheral groove portion 35 is formed is not in contact with the collar portion 46 when the buffer member 3 is attached. That is, a space is formed between the inner peripheral surface of the intermediate portion 33 and the outer peripheral surface of the collar portion 46 in a state of being attached to the blower 1.

  Next, transmission of vibration generated when the blower 1 is activated will be described. The motor body generates torque fluctuations during rotation. Due to this torque variation, vibration in the rotational direction is generated in the motor body. The vibration in the rotational direction is transmitted to the flange portion 22 of the motor cover 20 and is transmitted to the outer peripheral groove portion 34 of the buffer member 3 that is in contact with the flange portion 22. Therefore, in FIG. 4, the vibration in the vertical direction of the paper surface is transmitted from the flange portion 22 to the outer peripheral groove portion 34 of the buffer member 3. Thereby, the part pinched by the outer periphery groove part 34 and the opposing part 35a vibrates greatly by the vibration of an orthogonal direction. However, since the facing portion 35 a is separated from the collar portion 46, this vibration is not directly transmitted to the collar portion 46.

  The vibration is transmitted from the intermediate portion 33 to the collar portion 46 via the support portions 31 and 32. The intermediate portion 33 has a so-called doubly-supported cross-sectional shape, and the vibration of the intermediate portion 33 is transmitted to the support portions 31 and 32 while being absorbed by the restoring force of the intermediate portion 33. The vibration transmitted to the support portions 31 and 32 is transmitted from the collar portion 46 to the screw 4.

  Next, the effect which the air blower 1 and the buffer member 3 of 1st Embodiment bring is demonstrated. The buffer member 3 is provided between the case 5 that houses the blower fan 6 and the motor device 2 that rotationally drives the blower fan 6. The buffer member 3 is a cylindrical body that can be elastically deformed. The buffer member 3 connects the case 5 and the motor device 2 together with the screw 4 in which the shaft portion 42 is inserted and fixed in the case 5. The buffer member 3 includes support portions 31 and 32 that are portions on both sides in the axial direction of the cylindrical body, and indirectly contact the shaft portion 42 in a state where the shaft portion 42 is inserted. The buffer member 3 includes an intermediate portion 33 which is a portion between the support portions 31 and 32 in the axial direction of the cylindrical body and has a larger inner diameter than the support portions 31 and 32. The intermediate portion 33 includes an outer peripheral groove portion 34 that is separated from the shaft portion 42 and contacts the motor device 2 at the outer peripheral portion to support the motor device 2.

  According to this, the inner peripheral surface of the intermediate portion 33 of the buffer member 3 is separated from the shaft portion 42. For this reason, the intermediate portion 33 can absorb the vibration transmitted from the flange portion 22 to the outer peripheral groove portion 34 by elastic deformation while suppressing the direct transmission to the shaft portion 42. Thereby, the vibration transmitted from the motor device 2 to the shaft portion 42 via the buffer member 3 can be suppressed, and hence the vibration transmitted from the shaft portion 42 to the case 5 can be suppressed. Further, vibration transmitted from the support portions 31 and 32 to the shaft portion 42 via the collar portion 46 is attenuated by elastic deformation of the support portions 31 and 32. As described above, it is possible to provide the buffer member 3 capable of suppressing the vibration of the motor device 2 from being transmitted to the case 5. Moreover, the air blower 1 which can suppress that the vibration of the motor apparatus 2 transmits to the case 5 by applying to the air blower 1 which has this buffer member 3 can be provided.

  The axial dimension of the intermediate portion 33 is larger than the axial length of the outer circumferential groove 34. According to this, in the buffer member 3, a portion including the outer peripheral groove portion 34 in the axial direction and larger than the outer peripheral groove portion 34 is not in contact with the collar portion 46. Therefore, a larger portion of the shock absorbing member 3 can be absorbed by elastic deformation without transmitting the vibration transmitted from the flange portion 22 to the outer peripheral groove portion 34 to the shaft portion 42 via the collar portion 46. That is, vibration transmission can be further suppressed.

(Second Embodiment)
2nd Embodiment demonstrates the modification of the buffer member 3 and the air blower 1 in 1st Embodiment. In FIG. 7, the constituent elements denoted by the same reference numerals as those in the drawing of the first embodiment are the same constituent elements and exhibit the same operational effects.

  As shown in FIG. 7, the buffer member 3 of the second embodiment is different from the first embodiment in that a part of the intermediate portion 33 is in contact with the collar portion 46. In the state before the buffer member 3 is attached to the blower 1, the inner peripheral surface of the intermediate portion 33 is positioned more radially outward than the inner peripheral surfaces of the support portions 31 and 32, as in the buffer member 3 of the first embodiment. It is in a state of being. The buffer member 3 is deformed in the orthogonal direction by the flange portion 22 while being attached to the blower 1. That is, as shown in FIG. 7, it deform | transforms so that it may dent toward the axial part 42 centering on the outer peripheral groove part 34 with the flange part 22. As shown in FIG. In other words, the buffer member 3 is deformed so that the intermediate portion 33 bends with respect to the collar portion 46 and the shaft portion 42. As a result, the intermediate portion 33 is in contact with the collar portion 46. In other words, a part of the intermediate portion 33 bent toward the shaft portion 42 is indirectly in contact with the shaft portion 42 via the collar portion 46.

  Of the inner peripheral surface of the intermediate portion 33, the opposing portion 35 a, which is a portion facing the outer peripheral groove portion 34 in the orthogonal direction, has the largest displacement in the radial direction due to bending, and this opposing portion 35 a is connected to the collar portion 46. In contact. The intermediate portion 33 may have a configuration in which only a part of the portion bent toward the shaft portion 42 in the circumferential direction is in contact with the collar portion 46, or a portion of the portion bent in the circumferential direction. The configuration may be such that the entirety is in contact with the collar portion 46.

  According to the buffer member 3 of the second embodiment, the intermediate portion 33 tends to be separated from the shaft portion 42 by the restoring force against the bending of the intermediate portion 33. Therefore, the vibration in the intermediate portion 33 is suppressed from being transmitted to the collar portion 46 even in the portion in contact with the collar portion 46. That is, the vibration transmitted from the flange portion 22 to the outer peripheral groove portion 34 can be absorbed. As a result, even when the buffer member 3 has a portion that is indirectly in contact with the shaft portion 42 in the intermediate portion 33, transmission from the flange portion 22 to the shaft portion 42 via the buffer member 3. The vibration transmitted is suppressed, and the vibration transmitted from the shaft portion 42 to the case 5 is further suppressed. As described above, it is possible to provide the buffer member 3 and the blower 1 that can suppress the vibration of the motor device 2 from being transmitted to the case 5.

(Third embodiment)
3rd Embodiment demonstrates the modification of the buffer member 3 and the air blower 1 in 1st Embodiment. In FIG. 8, the constituent elements having the same reference numerals as those in the drawing of the first embodiment are the same constituent elements and have the same operational effects.

  The shaft portion 342 of the screw 304 includes a male screw portion 342e that is a portion in which a male screw is formed and is inserted into the case 5, and an insertion portion 342a that is a portion that is inserted into the buffer member 303. A groove 343 is formed in the insertion part 342a. The groove portion 343 is formed over the entire circumference of the insertion portion 342a. The groove portion 343 is formed so that the axial width includes the outer peripheral groove portion 334 in the buffer member 303. The groove part 343 is provided in the approximate center in the axial direction of the insertion part 342a. That is, the outer diameter between the both side portions is smaller than the outer diameter of the both side portions in the axial direction of the insertion portion 342a. The portions on both sides in the axial direction of the insertion portion 342a are referred to as outer peripheral contact portions 342b and 342d. Further, a portion between the outer peripheral contact portion 342b and the outer peripheral contact portion 342d, that is, a portion where the groove portion 343 is formed is referred to as a small diameter intermediate portion 342c. The outer peripheral surfaces of the outer peripheral contact portions 342b and 342d are in contact with the inner peripheral surface of the buffer member 303. The small diameter intermediate portion 342 c is separated from the inner peripheral surface of the buffer member 3. That is, the insertion portion 342a is not in contact with the surface including at least the facing portion 335a among the inner peripheral surface of the buffer member 303.

  In the blower device 1 of the third embodiment, the inner peripheral groove portion is not formed on the inner peripheral surface of the buffer member 303. The inner peripheral surface of the buffer member 303 is flush. The blower device 1 does not have a collar portion between the shaft portion 342 of the screw 304 and the buffer member 303. In other words, the shaft portion 342 of the screw 304 and the buffer member 303 are in direct contact. The buffer member 303 includes support portions 331 and 332 that come into contact with the insertion portion 342 a of the shaft portion 342. The buffer member 303 has a middle portion 333 which is a portion between the support portion 331 and the support portion 332 and is a portion facing the groove portion 343. The intermediate part 333 is not in contact with the insertion part 342a by the groove part 343.

  According to the blower device 1 of the third embodiment, the small-diameter intermediate portion 342 c of the shaft portion 342 is separated from the inner peripheral portion of the buffer member 303. Therefore, the vibration transmitted from the motor device 2 to the outer peripheral groove 334 in the buffer member 303 is absorbed by elastic deformation while suppressing the direct transmission from the portion of the buffer member 303 facing the small-diameter intermediate portion 342c to the shaft portion 342. can do. Thereby, the vibration transmitted from the motor device 2 to the shaft portion 342 via the buffer member 303 is suppressed, and consequently the vibration transmitted from the shaft portion 342 to the case 5 is suppressed. As described above, it is possible to provide the buffer member 303 and the blower 1 that can suppress the vibration of the motor device 2 from being transmitted to the case 5. Furthermore, since the groove part 343 is formed in the screw 304, it is not necessary to provide an inner peripheral groove part in the buffer member 303. For this reason, the buffer member 303 can be made into a simpler shape. Thereby, the productivity of the buffer member 303 can be improved. In addition, since there is no collar portion between the screw 304 and the buffer member 303, the number of parts can be reduced.

(Other embodiments)
The disclosure in this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combinations of parts and / or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which parts and / or elements of the embodiments are omitted. The disclosure encompasses the replacement or combination of parts and / or elements between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. Some technical scope disclosed is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims. .

  In the above-described embodiment, the blower fan 6 employs a cross flow fan. Instead, various fans such as a centrifugal fan such as a sirocco fan and a turbo fan, a mixed flow fan, and an axial flow fan may be employed.

  In the above-described embodiment, the plurality of flange portions 22 extend in the radially outward direction of the motor cover 20, and the cutout portions 22a are formed in each of them. Instead, one flange portion may be formed over the entire circumference in the radially outward direction, and cutout portions may be formed in the flange portion at a predetermined interval.

  In the above-described embodiment, the air blower is applied to the vehicle air conditioner, but can be applied to other than this. For example, a blower may be applied to cool a battery in a battery pack mounted on an electric vehicle or the like. Moreover, you may apply an air blower to an indoor air conditioner.

  In the above-described embodiment, the fixture is provided by a tapping screw, but the type of the fixture is not limited thereto. For example, a screw that fits with a female screw formed in advance in the case may be used. It may also be provided by a bolt that fits into the nut.

  In the above-described embodiment, the axial dimension of the intermediate portion 33 is greater than the axial length of the outer circumferential groove 34. Instead of this, the axial dimension of the intermediate portion 33 may be equal to the axial length of the outer circumferential groove 34. Even in this configuration, it is possible to prevent the vibration in the axial direction where the vibration in the orthogonal direction in the buffer member 3 is the largest, that is, the vibration in the outer circumferential groove 34 from being directly transmitted to the shaft 42 in the orthogonal direction.

  In the above-described embodiment, the collar portion 46 is provided between the shaft portion 42 and the buffer member 3. Alternatively, the collar portion 46 may not be provided, and the shaft portion 42 and the buffer member 3 may be in direct contact with each other.

  In the above-described embodiment, the buffer members 3 and 303 have the outer peripheral groove portion 34 formed on the outer peripheral surface, but the outer peripheral groove portion 34 may not be formed. Even in this configuration, the portions of the outer peripheral surfaces of the buffer members 3 and 303 that are in contact with the flange portion 22 can support the motor device 2. In this case, the part which contacts the flange part 22 in the outer peripheral surface of the buffer members 3 and 303 is a contact part.

    2 Motor device, 22 mounting portion, 3, 303 buffer member, 31, 32 support portion, 33 intermediate portion, 34 outer peripheral groove portion (contact portion), 342c small diameter intermediate portion, 4, 304 fixing tool (screw), 42, 342 shaft Part, 342a insertion part, 342b, 342d outer peripheral contact part, 46 collar part, 5 case, 6 blower fan.

Claims (7)

A cylindrical body that is provided between a case (5) that houses the blower fan (6) and a motor device (2) that rotationally drives the blower fan and is elastically deformable. 42) is a buffer member that connects the case and the motor device together with a fixture (4) that is inserted and fixed in the case,
Support portions (31, 32) that are portions on both sides in the axial direction of the cylindrical body, and that are in direct or indirect contact with the shaft portion in a state in which the shaft portion is inserted;
An intermediate portion (33) between the support portions in the axial direction of the cylindrical body and having a larger inner diameter than the support portions;
With
The said intermediate part is a buffer member which is spaced apart from the said shaft part and contacts the said motor apparatus in an outer peripheral part, and contains the contact part (34) which supports the said motor apparatus.   The shock absorbing member according to claim 1, wherein a dimension of the intermediate portion in the axial direction is larger than a length of the contact portion in the axial direction.   The said contact part is an outer periphery groove part (34) provided in the said outer peripheral part in the said intermediate part, Comprising: The mounting part (22) of the said motor apparatus fits in the said outer peripheral groove part. The shock-absorbing member described in 1. A blower fan (6);
A case (5) for accommodating the blower fan therein;
A motor device (2) for rotationally driving the blower fan;
A fixture (4) having a shaft (42) inserted into the case;
The buffer member (3) according to any one of claims 1 to 3,
A blower comprising: The intermediate portion of the buffer member is
The blower according to claim 4, wherein at least a part of the blower is in direct or indirect contact with the shaft portion in a state of being bent toward the shaft portion.   The blower according to claim 4 or 5, further comprising a cylindrical collar portion (46) that comes into contact with the support portion in a state of being fitted to the outside of the shaft portion. A blower fan (6);
A case (5) for accommodating the blower fan therein;
A motor device (2) for rotationally driving the blower fan;
A fixture (304) having a shaft (342) inserted into the case;
It is provided between the case and the motor device, and is an elastically deformable cylindrical body through which the shaft portion is inserted, and the case and the motor device are connected together with the fixture, A buffer member (303) having a contact portion (334) for contacting and supporting the motor device;
With
The shaft portion is
Outer peripheral contact portions (342b, 342d) that are portions on both sides in the axial direction of the insertion portion (342a) that is a portion inserted through the buffer member and whose outer peripheral portion contacts the inner peripheral portion of the buffer member;
A small diameter intermediate portion (342c) between the outer peripheral contact portions in the axial direction and having a smaller outer diameter than the outer peripheral contact portion and spaced from the inner peripheral portion of the buffer member;
Have
The small diameter intermediate portion is a blower formed in a range including the contact portion of the buffer member in the axial direction.

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