JP6024619B2 - Air blower for seat air conditioning - Google Patents

Description

  The present invention relates to a blower used for a seat air conditioner.

  A blower supported by a seat spring in a vehicle seat air conditioner is disclosed in, for example, Patent Document 1. The blower of Patent Document 1 is fixed to a seat spring via a vibration-proof elastic member made of a low-elastic material such as a rubber material or a resin material.

JP-A-2005-29085

  Since the blower of the seat air conditioner is fixed to the seat spring, the blower and the seat spring constitute a vibration system in which the seat spring is a spring term and the blower is a mass term. And in patent document 1, by fixing an air blower to a seat spring through the vibration-proof elastic member which consists of foaming urethane, the natural frequency of the said vibration system is made lower than the use rotational speed range of an air blower, and thereby it vibrates. Reduction is being achieved.

  However, a vibration-proof elastic member such as a rubber material or a resin material becomes hard when used at a low temperature or for a long time. Then, since the natural frequency increases due to the elastic member for vibration isolation becoming hard, resonance occurs in the rotation speed range of the blower and vibration increases, resulting in problems in durability and reliability. .

  In view of the above points, an object of the present invention is to provide a seat air-conditioning blower that achieves both improvement in durability and reliability and reduction in vibration.

  In order to achieve the above object, according to the first aspect of the present invention, an impeller (20) that generates an air flow, a motor (18) that rotates a rotating shaft (30) that supports the impeller, and the impeller A casing (22) for housing a car and the motor, and a support member (50) for supporting the casing with respect to the seat spring in a state where the casing is suspended from a seat spring (16) constituting a vehicle seat, The support portion where the support member supports the casing is located in the axial center direction of the rotating shaft, and the impeller, the motor, and the casing are configured to move the support portion as the motor rotates. It is characterized by being able to swing around the center.

  Here, the cause of the vibration accompanying the rotation of the motor is that the moment around the support part of the blower varies due to the uneven load of the blower. Specifically, the vibration of the blower is a rotation The swinging motion is to swing the shaft (that is, the blower) like a pendulum.

  According to the first aspect of the present invention, the impeller, the motor, and the casing perform a swinging motion around the support portion as the motor rotates. For this reason, it can suppress that the vibration which arises by the fluctuation | variation of a moment is transmitted to the seat spring side.

  Furthermore, in the first aspect of the present invention, the vibration-proof elastic member is not interposed between the blower and the seat spring. For this reason, there is no problem in durability and reliability due to the vibration-proof elastic member becoming hard.

  As described above, it is possible to provide a seat air-conditioning blower that achieves both improved durability and reliability and low vibration.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure which shows the outline | summary of the whole structure of the vehicle seat provided with the sheet | seat air conditioner which has an air blower of this invention. It is a top view of the air blower and seat spring of 1st Embodiment of this invention, Specifically, it is the figure seen from the arrow II direction in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is the figure which expanded the bush vicinity in FIG. It is 5V-V sectional drawing in FIG. It is the figure showing the relationship between the rotation speed of a motor and the vibration of an air blower in the air blower of FIG. FIG. 3 is a diagram corresponding to FIG. 2, and is a plan view showing a blower and a seat spring as a comparative example with respect to the first embodiment. It is VIII-VIII sectional drawing of FIG. It is a figure which shows the structure which supports an air blower with respect to the pressing board in this 2nd Embodiment of this invention. It is XX sectional drawing of FIG. It is a figure which shows the structure which supports an air blower with respect to the pressing board in this 3rd Embodiment of this invention. It is XII-XII sectional drawing of FIG. It is a figure which shows the structure which supports an air blower in this 4th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
FIG. 1 is a diagram showing an outline of the overall configuration of a vehicle seat 14 provided with a seat air conditioner 12 having a blower 10 according to the present invention. The vehicle seat 14 is, for example, a driver seat or a passenger seat.

  As shown in FIG. 1, the vehicle seat 14 includes a seat cushion (not shown) made of urethane foam or the like and supporting an occupant, four seat springs 16, and a seat air conditioner 12.

  The seat air conditioner 12 includes a blower 10, and ventilates the seat contact surface for the occupant by driving the blower 10. In the present embodiment, the air is passed through the seat contact surface with respect to the butt of the occupant, that is, the seat seat surface 14a. For example, the seat air conditioner 12 circulates air so that air is sucked into the blower 10 from the seat seat surface 14a and blown out from the blower 10.

  FIG. 2 is a plan view of the blower 10 and the seat spring 16, and specifically, is a view seen from the direction of arrow II in FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

  As shown in FIG. 2, the vehicle seat 14 is provided with a longitudinal seat spring 16 that extends longitudinally in the vehicle front-rear direction along the seat seat surface 14 a. The four seat springs 16 are metal spring wires constituting the vehicle seat 14, support the seat cushion, and give elasticity to the seat seat surface 14 a.

  Specifically, the four seat springs 16 are arranged in parallel in the left-right direction of the vehicle, that is, in the vehicle width direction. The arrangement direction of the seat springs 16 is orthogonal to the longitudinal direction of the seat springs 16. The seat spring 16 is formed into a wave shape with a space between adjacent seat springs 16.

  As shown in FIG. 1, the blower 10 is provided on the opposite side (that is, the lower side) to the seat seat surface 14 a with respect to the four seat springs 16 in the vehicle seat 14. As shown in FIG. 3, the blower 10 is a centrifugal blower, and includes a motor 18, an impeller 20, a casing 22, and a rotating shaft 30. The blower 10 generates an air flow by rotating the impeller 20 with the motor 18.

  The motor 18 of the blower 10 includes a core 181, a rotor 182, and a magnet 183. When the motor 18 is energized from the external power source to the core 181, magnetic flux changes in the core 181, and a force that attracts the magnet 183 fixed to the rotor 182 is generated. Since the rotor 182 is fixed to the rotary shaft 30 supported by the bearing support portion 26 fixed to the casing 22 via the bearing 28, the rotor 182 receives the force that attracts the magnet 183 and rotates around the axis of the rotary shaft 30. Rotating motion.

  In the present embodiment, when the rotor 182 is stopped, the axial center direction of the rotating shaft 30 is a vertical direction and is orthogonal to the longitudinal direction of the seat spring 16.

  The impeller 20 is fixed to the rotor 182 of the motor 18 and rotates integrally with the rotary shaft 30 and the rotor 182. In other words, when the impeller 20 is rotated by the motor 18, the wing portion of the impeller 20 imparts momentum to the air, and the air is sent from the center portion of the impeller 20 toward the outer peripheral portion as indicated by an arrow ARair. In short, the impeller 20 blows air by rotating around the axis of the rotary shaft 30.

  Specifically, air from the seat seat surface 14a (see FIG. 1) is sucked into the blower from an air suction port 22a (see FIG. 5) formed in the upper center portion of the casing 22, and passes through the wing portion of the impeller 20. Then, the air is sent to an air flow path 22b formed in the casing 22 on the outer side in the radial direction of the impeller 20. Then, the air flow path 22 b is sent out of the vehicle seat 14 through an air outlet formed in the casing 22.

  The casing 22 forms a housing of the blower 10 and houses the motor 18, the impeller 20, the bearing support portion 26, the bearing 28, and the rotating shaft 30. And they are protected from external dust and dirt. For example, the casing 22 is formed by integrating two members. A beam 40 and four air inlets 22a are formed on the seat spring 16 side of the casing 22. The beam 40 is formed in a cross shape when viewed from the front side of the page in FIG. 5 and divides each of the four air suction ports 22a. The beam 40 forms a protruding portion that protrudes toward the celestial region improvement side (upper side in FIG. 3). The central portion 40a of the beam 40 forms the tip of the beam 40 on the heaven region improvement side. The central portion 40 a of the beam 40 is located on one side in the axial direction of the rotating shaft 30. The central portion 40 a of the beam 40 is located in the opening 60 a of the stopper plate 60 and is located below the central portion 63 a of the beam portion 63 in the pressing plate 61.

  The central portion 40 a of the beam 40 is supported by the bush 50 with respect to the central portion 63 a of the beam portion 63 in the pressing plate 61. The holding plate 61 and the stop plate 60 are fixed to the two seat springs 16 by sandwiching the two seat springs 16 therebetween. Accordingly, the bush 50 supports the casing 22 (that is, the blower 10 itself) in a suspended state with respect to the vehicle seat 14.

  As shown in FIG. 2, the pressing plate 61 includes four openings 62 and a beam portion 63. The four opening portions 62 and the beam portion 63 are located between the two seat springs 16. The beam portion 63 is formed in a cross shape when viewed from the front side of the paper in FIG. 2, and divides the four air suction ports 62. The four air suction ports 62 are each formed in a fan shape (see FIG. 2). An opening 60 a is formed in the stop plate 60. The four openings 62 are opposed to the four air inlets 22a through the openings 60a. That is, the four openings 62 communicate with the openings 60a and the four air inlets 22a.

  In the pressing plate 61 of FIG. 4, a hole portion 64 that opens upward is provided in the central portion 63 a of the beam portion 63. The hole portion 64 accommodates the spherical portion 51 of the bush 50. A gap is formed between the formation portion 64 a that forms the hole portion 64 and the spherical portion 51 in the central portion 63 a of the beam portion 63. The lower side of the hole 64 is provided with a lower opening on the lower side of the pressing plate 61. The protrusion 52 of the bush 50 is located in the lower opening. The protruding portion 52 protrudes from the spherical portion 51 to the center portion 40a side of the beam 40 through the lower opening. The tip end side of the protrusion 52 is fitted in the recess 41 a of the central portion 40 a of the beam 40. As a result, the bush 50 is connected to the tip side of the protrusion of the beam 40 of the casing 22 so that the blower 10 itself can swing in all directions of 360 degrees in the horizontal direction (ie, the seat spring 16). Will be supported. That is, the bush 50 is supported with respect to the pressing plate 61 so as to swing around the blower 10 itself.

  A boot 70 formed in a bellows shape with rubber or the like is disposed between the casing 22 and the stop plate 60. The boot 70 is a duct member that forms an air passage between the four openings 62 and the four air suction ports 22a via the opening 60a. As will be described later, the boot 70 is configured to be elastically deformed with the swinging motion of the blower 10.

  In such a blower 10, the center of gravity of the rotating member including the impeller 20, the rotor 182, the magnet 183, and the rotating shaft 30 is on the axial center of the rotating shaft 30 from the viewpoint of suppressing vibration during operation of the blower 10. Although it is desirable to be located at, it is slightly shifted in practice. For this reason, when the motor 18 rotates, the blower 10 becomes unbalanced. Therefore, when the motor 18 rotates, a moment centering on the connection portion of the blower 10 is generated due to the shift of the center of gravity. The connection part of the blower 10 is a support part located on the distal end side of the protrusion 52 of the bush 50 and in the recess 41 a of the central part 40 a of the beam 40. Thereby, the bush 50 is supported with respect to the pressing plate 61 (that is, the seat spring 16) so that the protrusion 52 can swing.

  For this reason, as the motor 18 rotates, the blower 10 swings around the connection point of the blower 10 as the center of inclination of the blower 10. At this time, the boot 70 is elastically deformed as the blower 10 swings. For this reason, the boot 70 guides the air sucked in from the seat cushion side and passed through the openings 62 and 60a into the opening 22a. The guided air is sent out from the center of the impeller 20 toward the outer periphery. And it sends out to the air flow path 22b formed in the casing 22 in the radial direction outer side of the impeller 20. Then, the air flow path 22 b is sent out of the vehicle seat 14 through an air outlet formed in the casing 22.

  According to the present embodiment described above, the bush 50 supports the casing 22 with respect to the seat spring 16 in a state where the casing 22 is suspended from the seat spring 16 constituting the vehicle seat. The bush 50 is connected to the casing 22 and supports the casing 22 to be swingable with respect to the seat spring 16. The connection part where the bush 50 supports the casing 22 is a support part located on one side (upper side) in the axial direction of the rotating shaft 30. The impeller 20, the motor 18, and the casing 22 perform a swinging motion centering on the connection portion in a state where the casing 22 is tilted with respect to the vertical direction as the motor 18 rotates.

  The cause of the vibration accompanying the rotation of the motor 18 is caused by a bias in the load of the blower 10 and is a variation in the moment centering on the connection portion of the blower 10. If it says, it will become the rocking | fluctuation motion which tries to rock the air blower 10 like a pendulum.

  On the other hand, in this embodiment, the motor 18 and the casing 22 perform a whirling motion centering on the connection portion in a state where the casing 22 is tilted with respect to the vertical direction as the motor 18 rotates. Do.

  For this reason, even if the moment centering on the connection portion is generated, a load is not applied to the holding plate 61 side (that is, the vehicle seat 14 side) due to the moment. For this reason, the vibration generated by the fluctuation of the moment is not transmitted to the vehicle seat 14 side.

  In this embodiment, the vibration-proof elastic member is not interposed between the blower and the seat spring. For this reason, there is no problem in durability and reliability due to the elastic member becoming hard.

  In this embodiment, the inclination spring constant around the connection point of the blower 10 is sufficiently low. The inclination spring constant around the connection point of the blower 10 is a spring constant in the axial direction of the rotating shaft 30 of the blower 10. The inclination spring constant is mainly determined by the bush 50 and the pressing plate 61.

  For this reason, as shown by a graph L01 in FIG. 6 representing the relationship between the rotation speed (rpm) of the motor 18 and the vibration of the blower 10, the resonance point in the vibration of the blower 10 is lower than the use rotation speed range of the blower 10. Thus, vibration amplification due to resonance can be prevented.

  A graph L02 illustrated in FIG. 6 represents the relationship between the vibration in the blower 10 illustrated in FIGS. 7 and 8 and the number of rotations of the motor 18. FIG. 7 is a view corresponding to FIG. 2, and is a plan view showing the blower 10 and the seat spring 16 as a comparative example with respect to the present embodiment. 8 is a cross-sectional view taken along the line VIII-VIII in FIG.

  As shown in FIGS. 7 and 8, the blower 10 of the comparative example is connected to the two inner seat springs 16 of the four seat springs 16, unlike the present embodiment. The two seat springs 16 are connected to the inside of the outer shape of the casing 22. Therefore, in the blower 10 shown in FIGS. 7 and 8, since the two seat springs are easily bent with respect to the vibration of the blower 10 that is the swinging motion, the resonance point of the vibration is implemented as shown by the graph L02 in FIG. It becomes high compared with the form, and is within the operating rotational speed range of the blower 10. That is, the vibration of the blower 10 is amplified at the resonance point.

  On the other hand, in the rotational speed range above the resonance point, the tilt angle in the axial direction of the rotating shaft 30 is reduced by the self-aligning effect by the gyro moment, so that the casing 22 and the pressing plate 61 do not collide.

  Thus, as can be seen by comparing the graph L01 and the graph L02 in FIG. 6, in this embodiment, the vibration of the blower 10 can be reduced due to the difference in the support structure of the blower 10.

  As described above, it is possible to provide the blower 10 that achieves both improvement in durability and reliability and reduction in vibration.

(Second Embodiment)
In the said 1st Embodiment, although the example which used the bush 50 as a supporting member was demonstrated as a structure which supports the air blower 10 with respect to the holding | suppressing board 61, it replaces with this and it is as shown in FIG. 9, FIG. Also good.

  9 and 10 show a structure for supporting the blower 10 with respect to the pressing plate 61 in the second embodiment.

  The central portion 63a of the pressing plate 61 of the present embodiment is provided with a curved portion 80 that protrudes downward as a support member. The curved portion 80 is formed with a groove portion 81 that opens upward. The bottom portion 82 of the groove portion 81 is formed in a V shape that protrudes downward.

  On the other hand, a curved portion 85 that protrudes toward the central portion 63 a of the pressing plate 61 is provided at the central portion 40 a of the beam 40 of the casing 22. The bending portion 85 is provided with a hole 86. The ceiling part 86a of the hole part 86 is formed in a U-shape that protrudes upward.

  Here, the distal end side 85 a of the bending portion 85 is located in the groove portion 81 of the bending portion 80. As a result, the distal end side 85 a of the bending portion 85 is supported by the bottom portion 82 of the groove portion 81 of the bending portion 80. That is, the bending portion 80 supports the bending portion 85 so as to be swingable in the A direction.

  In addition, the distal end side 80 a of the bending portion 80 is located in the hole 86 of the bending portion 85. Thereby, the distal end side 80 a of the bending portion 80 is supported by the ceiling portion 86 a of the hole portion 86 of the bending portion 85. That is, the bending portion 80 supports the bending portion 85 so as to be swingable in the B direction. The A direction and the B direction are horizontal directions orthogonal to the top and bottom directions, and are directions orthogonal to each other.

  As described above, the bending portion 85 is supported so as to be swingable with respect to the bending portion 80 in each of the A direction and the B direction. As a result, the bending portion 85 is connected to the bending portion 80 so as to be swingable in all directions of 360 degrees in the horizontal direction. Therefore, when the motor 18 rotates, the blower 10 performs a swinging motion with the connection portion of the blower 10 as the center of inclination of the blower 10. In this embodiment, let the site | part which mutually contacts among curved parts 80 and 85 be a connection site | part (namely, support site | part) of the air blower 10. FIG.

  In addition, in this embodiment, since it is the same as that of the said 1st Embodiment except the structure which supports the air blower 10 with respect to the pressing board 61, the description is abbreviate | omitted.

(Third embodiment)
In the second embodiment, the example in which the curved portion 80 is used as the support member of the blower 10 with respect to the pressing plate 61 has been described. Instead, in the third embodiment, as shown in FIGS. May be.

  11 and 12 show a support structure of the blower 10 with respect to the pressing plate 61 in the second embodiment.

  In the central portion 63a of the pressing plate 61 of this embodiment, a hole portion 90 penetrating in the vertical direction is provided. In the hole 90, a ring member 91 having an opening 91a penetrating in the vertical direction is disposed as a support member. The ring member 91 is provided with a shaft 92 extending in the horizontal direction. The ring member 91 is supported with respect to the pressing plate 61 so as to be swingable in the A direction about the shaft 92.

  On the other hand, a protruding portion 93 protruding upward is provided at the central portion 40 a of the beam 40 of the casing 22. A shaft 94 extending in the horizontal direction is provided on the distal end side of the protrusion 93. The protrusion 93 is supported so as to be swingable in the B direction about the shaft 94 with respect to the ring member 91. The B direction is a direction perpendicular to the paper surface in FIG. The A direction and the B direction are horizontal directions orthogonal to the top and bottom directions, and are directions orthogonal to each other.

  As described above, the central portion 40a of the beam 40 of the casing 22 is supported so as to be swingable in all directions of 360 degrees in the horizontal direction via the shafts 92 and 94 with respect to the central portion 63a of the pressing plate 61. Therefore, when the motor 18 rotates, the blower 10 performs a swinging motion with the connection portion of the blower 10 as the center of inclination of the blower 10.

  In this embodiment, the part located in the opening part 91a of the ring member 91 among the protrusions 93 of the central part 40a of the beam 40 of the casing 22 is defined as a connection part (that is, a support part) of the blower 10.

  In addition, in this embodiment, since it is the same as that of the said 1st Embodiment except the structure which supports the air blower 10 with respect to the pressing board 61, the description is abbreviate | omitted.

(Fourth embodiment)
In the said 1st Embodiment, although the bush 50 was displaced as a supporting member and demonstrated the example which the air blower 10 performed a whirling motion, it replaced with this and the air blower 10 swung by a displacement of a wire. An example of performing the above will be described.

  FIG. 13 shows a support structure of the blower 10 with respect to the presser plate 61 in the fourth embodiment.

  The blower 10 of this embodiment is supported with respect to the pressing plate 61 via a plurality of wires 100 (showing two wires in the figure). Specifically, one end of each of the plurality of wires 100 is connected to an open end 22 c that forms an air suction port 22 a on the upper side of the casing 22.

  The other ends of the plurality of wires 100 are connected to the stopper 110, respectively. The stopper 110 is located in the opening 60 a of the stopper plate 60 and is located below the central portion 63 a of the beam portion 63 in the pressing plate 61. The stopper 110 is fixed to the central portion 63 a of the beam portion 63 in the pressing plate 61 with a rivet 120.

  As described above, the stopper 110 and the rivet 120 constitute a support member. A portion of the rivet 120 connected to the stopper 110 constitutes a connection portion (that is, a support portion) of the blower 10. When the motor 18 rotates, the blower 10 performs a swinging motion with the connecting portion of the blower 10 as the center of inclination of the blower 10 due to the displacement of the plurality of wires 100.

  In addition, in this embodiment, since it is the same as that of the said 1st Embodiment except the structure which supports the air blower 10 with respect to the pressing board 61, the description is abbreviate | omitted.

(Other embodiments)
In the first to fourth embodiments, the example in which the centrifugal blower is used as the blower 10 has been described. However, instead of this, an axial flow blower may be used as the blower 10.

  Although the said 1st-4th embodiment demonstrated the example using the air blower 10 which suck | inhales and blows off air from the vehicle seat 14 side to the air blower 10 side, it is not restricted to this but the vehicle seat 14 side from the air blower 10 side. You may use the air blower 10 which flows air into.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible.

DESCRIPTION OF SYMBOLS 10 Blower 12 Seat air conditioner 16 Seat spring 18 Motor 20 Impeller 22 Casing 40 Beam 50 Bush (support member)
61 Presser plate 100 Wire

Claims (5)

An impeller (20) for generating an air flow;
A motor (18) that rotates a rotating shaft (30) that supports the impeller;
A casing (22) for housing the impeller and the motor;
A support member (50, 80, 91, 110, 120) for supporting the casing with respect to the seat spring in a state where the casing is suspended from a seat spring (16) constituting a vehicle seat,
The support portion where the support member supports the casing is located in the axial direction of the rotating shaft,
The blower for seat air conditioning, wherein the impeller, the motor, and the casing are configured to be capable of swinging around the support portion as the motor rotates.   The said support member (50, 80, 91) is connected with the said casing, and supports the said casing with respect to the said sheet | seat spring so that the said whirling motion is possible. Air blower for seat air conditioning. The casing includes a protrusion formed to protrude toward the support member,
The blower for seat air conditioning according to claim 2, wherein the support member is connected to a tip side of the protrusion. A plurality of wires (100) each having one end connected to the support member (110, 120) side and the other end connected to the casing side;
The support member is connected to one end of each of the plurality of wires to form the support portion;
The blower for seat air conditioning according to claim 1, wherein the impeller, the motor, and the casing perform the whirling motion by displacement of the plurality of wires. The impeller generates an air flow in the axial direction of the rotating shaft,
On the support member side of the casing, an opening (22a) that allows an air flow flowing in the axial direction to pass is formed.
A duct (70) formed to surround the opening between the casing side and the seat spring side;
The air-conditioning blower according to any one of claims 1 to 4, wherein the duct is configured to be elastically deformable with the swinging motion of the casing.

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