JP4451232B2 - Fluid pump device - Google Patents

Description

  The present invention relates to a fluid pump device in which a rotational force of a motor is transmitted to an impeller member in a non-contact manner.

2. Description of the Related Art Conventionally, there is a fluid pump device in which a motor and an impeller member are accommodated in a motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner (see, for example, Patent Document 1). In such a fluid pump device, for example, an impeller shaft is fixed to a motor case, and an impeller member is rigidly supported on the impeller shaft so as to be rotatable.
Special table 2003-522868 gazette

  However, in the fluid pump device as described above, since the impeller member is rigidly supported with respect to the motor case, vibrations caused by imbalance of the impeller member, a magnetic circuit of the motor, and the like are generated from the impeller member to the motor case. It is transmitted directly to. This causes an increase in indoor noise or the like in a vehicle equipped with such a fluid pump device (a motor case is fixed).

  The present invention has been made to solve the above-described problems, and its object is to reduce the transmission of vibrations caused by imbalance of the impeller member, the magnetic circuit of the motor, etc. from the impeller member to the motor case. An object of the present invention is to provide a fluid pump device that can perform the above-described operation.

According to the first aspect of the present invention, in the fluid pump device in which the motor and the impeller member are accommodated in the motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner, the impeller member is rotated. The impeller shaft that can be supported is float-supported with respect to the motor case, so that the impeller member is float-supported with respect to the motor case, and the impeller shaft is fixed to the motor case via an elastic member. The both ends of the impeller shaft are fixed to the motor case via the elastic members, and the two elastic members arranged at both ends of the impeller shaft protrude on one side and the other side. The number of parts is different .

According to a second aspect of the present invention, in the fluid pump device in which the motor and the impeller member are accommodated in the motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner , the impeller member is rotated. The impeller shaft that can be supported is float-supported with respect to the motor case, so that the impeller member is float-supported with respect to the motor case, and the impeller shaft is fixed to the motor case via an elastic member. The both ends of the impeller shaft are fixed to the motor case via the elastic members, and the two elastic members arranged at both ends of the impeller shaft protrude on one side and the other side. It arrange | positions so that the angle of a part may shift | deviate .

In the invention described in claim 3, in the fluid pump device according to 請 Motomeko 1 or 2, wherein the impeller member has a bearing which is fitted rotatably relative to the impeller shaft.

According to a fourth aspect of the present invention, in the fluid pump device according to the third aspect , the elastic member has a restricting surface that restricts movement of the impeller member in the axial direction by coming into contact with the bearing.

In the invention described in claim 5, in the fluid pump device according to any one of claims 1 to 4, the motor case to form a holding portion for holding fitted in the elastic member, The elastic member is formed in a substantially cylindrical shape into which the impeller shaft can be inserted, and has a plurality of protrusions in the circumferential direction on the outer periphery thereof, such that the plurality of protrusions are pressed against the holding portion. It is fitted in the holding part.

According to a sixth aspect of the present invention, in the fluid pump device according to the fifth aspect , the plurality of protrusions are provided at equal angular intervals in the circumferential direction .

In a seventh aspect of the present invention, in the fluid pump device in which the motor and the impeller member are accommodated in the motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner , the impeller member is rotated. The impeller shaft that can be supported is float-supported with respect to the motor case, so that the impeller member is float-supported with respect to the motor case, and the impeller shaft is fixed to the motor case via an elastic member. The elastic member is formed in a substantially cylindrical shape into which the impeller shaft can be inserted, and is supported on the motor case in a circumferential direction that supports the outer periphery of the elastic member at a plurality of points in the circumferential direction. A plurality of claw portions were provided.
According to an eighth aspect of the present invention, in the fluid pump device according to the seventh aspect, the impeller member includes a bearing that is rotatably fitted to the impeller shaft.
According to a ninth aspect of the present invention, in the fluid pump device according to the eighth aspect of the present invention, the elastic member has a regulating surface that regulates the axial movement of the impeller member by contacting the bearing.

In the invention according to claim 1 0, in the fluid pump device according to any one of claims 7 to 9, wherein the plurality of claw portions, inlet channel inner wall from extending in the axial center side circumferential direction into a plurality of Provided in the inwardly extending portion.
In the invention according to claim 1 1, in the fluid pump device according to claim 1 0, wherein the plurality of inner extended portion of the tip, connecting the central portion to be arranged on the shaft center connecting them form The connection center portion was formed in a conical shape that tapered toward the inlet side.

(Function)
According to the invention described in the claims, since the impeller member is float supported against the motor case, that vibration due to the unbalance and the magnetic circuit of the motor or the like of the impeller member is transmitted to the motor case from the impeller member Reduced. Therefore, for example, indoor noise in a vehicle equipped with this fluid pump device can be reduced.

Further , it is possible to reduce the vibration caused by the unbalance of the impeller member and the magnetic circuit of the motor from being transmitted to the motor case from the impeller shaft that rotatably supports the impeller member.

The impeller shaft is float supported by being fixed to the motor case via an elastic member.
According to the first aspect of the present invention, the two elastic members arranged at both ends of the impeller shaft have different numbers of protrusions on one side and the other, so that vibration (force) is further dispersed, and the vibration is impeller. Transmission from the member to the motor case is further reduced.
According to the first and second aspects of the invention, since both ends of the impeller shaft are fixed to the motor case via the elastic member, only one end is fixed to the motor case via the elastic member (the other end). The impeller shaft can be float-supported easily while preventing the impeller shaft from collapsing compared to the case where the impeller shaft is not fixed.
According to the second aspect of the present invention, the two elastic members arranged at both ends of the impeller shaft are arranged so that the angle of the protruding portion is shifted between one and the other, so that the vibration (force) is further dispersed. Thus, the transmission of vibration from the impeller member to the motor case is further reduced.
According to the third and eighth aspects of the present invention, the impeller member has a bearing that is rotatably fitted to the impeller shaft. However, the impeller shaft has a centering function by being float-supported. When the axial end portion of the bearing is brought into sliding contact with the non-rotating member, it is reduced that the surface pressure is locally increased. Therefore, abnormal wear of the bearing can be reduced, and its durability and the like can be improved.

According to the invention described in claim 4 and 9, the elastic member, because it has a regulating surface for regulating the axial movement of the impeller member by contact with the bearing, a separate member is not required, such as washers, The number of parts can be reduced. Moreover, abnormal wear at the axial end of the bearing can be further reduced.

According to the invention described in claim 5 , the elastic member is formed in a substantially cylindrical shape into which the impeller shaft can be inserted, and has a plurality of protrusions in the circumferential direction on the outer periphery thereof, and the plurality of protrusions are motors. It is fitted in the holding part so as to be pressed against the holding part of the case. If it does in this way, since the contact part of a holding | maintenance part and an elastic member becomes multiple points | pieces in the circumferential direction, a vibration (force) will be disperse | distributed and it will further reduce that a vibration is transmitted from an impeller member to a motor case.

According to the invention described in claim 6 , since the plurality of projecting portions are provided at equal angular intervals in the circumferential direction, the contact portions with the holding portion become a plurality of points at equal angular intervals in the circumferential direction, and vibration is generated from the impeller member. Transmission to the motor case is reduced in a well-balanced manner.

According to the invention described in claim 7 , the elastic member is formed in a substantially cylindrical shape into which the impeller shaft can be inserted, and the motor case supports the outer periphery of the elastic member at a plurality of points in the circumferential direction. A plurality of claw portions are provided on the top. If it does in this way, since the contact part of a nail | claw part and an elastic member will be several points in the circumferential direction, a vibration (force) will be disperse | distributed and it will further reduce that a vibration is transmitted to an motor case from an impeller member. In addition, it is not necessary to make the shape of the elastic member complicated (form a plurality of protrusions in the circumferential direction), and a simple shape can be obtained.

According to the invention of claim 1 0, for a plurality of claw portions and is provided in a plurality of inner extending portion from the inner wall of the inlet passage circumferentially extending (impeller shaft) axis center side, It avoids that the cylindrical holding portion narrows the inflow passage as in the configuration in which a plurality of protrusions are formed in the circumferential direction on the outer periphery of the elastic member and the elastic member is fitted in the cylindrical holding portion. be able to. That is, a wide inflow path can be secured while obtaining the effects of the inventions of claims 7 to 9 . As a result, an increase in pressure loss can be suppressed.

According to the invention of claim 1 1, the tips of the inner extended portion, for connecting the central portion disposed on the axial center by connecting them are formed, a plurality of inner extending portion Increases rigidity. Further, it is possible to prevent the position of the claw portion provided in the inward extending portion from being displaced. And since a connection center part is formed in a tapered cone shape so that it goes to the inflow port side, it can suppress the increase in a pressure loss.

  ADVANTAGE OF THE INVENTION According to this invention, the fluid pump apparatus which can reduce that the vibration resulting from the imbalance of an impeller member, the magnetic circuit of a motor, etc. is transmitted from an impeller member to a motor case can be provided.

  Hereinafter, an embodiment in which the present invention is embodied as a fluid pump device for a cooling device for a vehicle engine will be described with reference to FIGS. As shown in FIG. 1, the fluid pump device includes a motor side case 1, a motor side cover 2, a pump side case 3, a motor main body 4 as a motor, an impeller member 5, an impeller shaft 6, and an elastic member. The motor side elastic member 7 and the pump side elastic member 8 are provided. In the present embodiment, the motor side case 1, the motor side cover 2, and the pump side case 3 constitute a motor case.

  The motor-side case 1 is made of a resin material and includes a substantially cylindrical cylindrical portion 1a and a partition wall 1b that partitions the inside thereof. As shown in FIG. 2, the partition wall 1b of the present embodiment includes a disk part 1c extending radially inward from one opening side end K1 of the cylindrical part 1a, and the other opening of the cylindrical part 1a from the disk part 1c. It consists of a small diameter cylindrical portion 1d extending to the side (right side in FIGS. 1 and 2) and a bottom portion 1e that closes the tip of the small diameter cylindrical portion 1d. At the center of the bottom portion 1e, a support cylinder portion 1f extending to one opening side (left side in FIGS. 1 and 2) of the cylindrical portion 1a is erected. Further, a motor side holding portion 1g as a cylindrical holding portion having the same outer diameter as that of the supporting cylinder portion 1f and having an inner diameter larger than that of the supporting cylinder portion 1f is extended at the tip end portion of the supporting cylinder portion 1f. The motor-side case 1 is partitioned by a partition wall 1b, so that a motor housing portion 1h for housing the motor body 4 and a pump chamber constituting a part of a pump chamber P described later are included therein. The component 1i is formed.

  As shown in FIG. 1, a motor main body 4 is accommodated in the motor accommodating portion 1h formed on the other opening side (right side in FIG. 1) of the cylindrical portion 1a, and the other opening side end of the cylindrical portion 1a. The motor side cover 2 is fixed to the part. The motor body 4 of the present embodiment is a direct current motor, and includes a yoke 11, a stator magnet 12 fixed to the inner peripheral surface of the yoke 11, and an armature 13 disposed inside the stator magnet 12. The armature 13 has a rotating shaft 14, and one end of the rotating shaft 14 is supported by a bearing 15 fixed to the bottom 1 e of the partition wall 1 b and the other end is fixed to the motor side cover 2. It is supported so that it can rotate. An outer ring magnet 17 that is one of coupling magnets is fixed to one end side of the rotating shaft 14 via a collar. The outer ring magnet 17 includes a disc portion 17a extending radially outward of the rotating shaft 14, a cylindrical portion 1a of the motor-side case 1 extending from the outer edge of the disc portion 17a, and a small-diameter cylindrical portion 1d of the partition wall 1b. The cylinder part 17b arrange | positioned in the clearance gap between.

  The pump side case 3 is made of a resin material. The pump-side case 3 includes a substantially cylindrical pump tube portion 3a, a curved portion 3b extending in a curved shape so that the inner diameter becomes smaller from one end side (left side in FIG. 2) of the pump tube portion 3a, and a curved portion An inflow tube portion 3c extending in a substantially cylindrical shape from one end side of 3b, and an outflow tube portion 3d extending outwardly (in FIG. 2, the back side in the drawing) so as to communicate with a hole formed in the peripheral wall of the pump tube portion 3a. With. In the present embodiment, the front end portion of the inflow tube portion 3c is the inflow port 3e, and the front end portion of the outflow tube portion 3d is the outflow port 3f.

  The pump-side case 3 includes a rib 3g extending obliquely from the inner wall (inner surface) of the curved portion 3b to the shaft center side and the other end side (right side in FIG. 2) of the pump cylinder portion 3a, and a tip of the rib 3g. A pump side holding portion 3h is formed as a holding portion disposed on the shaft center. The pump side holding portion 3h is formed in a substantially bottomed cylindrical shape with an opening on the counterflow inlet side (right side in FIG. 2). Incidentally, the ribs 3g of the present embodiment are formed at equal angular intervals in the circumferential direction (only two are shown in FIGS. 1 and 2).

  And the opening side end K2 of the pump cylinder part 3a in the pump side case 3 is fixed to one opening side end K1 of the cylindrical part 1a in the motor side case 1, so that the pump chamber constituting part 1i and the pump side A pump chamber P is formed by the inner surface of the case 3. At this time, the impeller shaft 6 is supported by the motor side holding portion 1g and the pump side holding portion 3h.

  Specifically, the both ends of the impeller shaft 6 are supported by the motor side holding portion 1g and the pump side holding portion 3h via the motor side elastic member 7 and the pump side elastic member 8 (with respect to the motor case). Float supported.

The impeller shaft 6 is made of a metal material. The impeller shaft 6 has a small-diameter portion 6a whose diameter is reduced at the tip (left side in FIGS. 1 to 3).
The motor side elastic member 7 is made of a rubber material. The motor-side elastic member 7 is formed in a substantially cylindrical shape into which a base end portion (right end portion in FIGS. 1 to 3) of the impeller shaft 6 can be fitted, and a plurality of projecting portions in the circumferential direction on the outer periphery thereof. It has a motor side protrusion 7a (see FIG. 3). Eight motor side protrusions 7a of the present embodiment are formed. Moreover, the motor side protrusions 7a are formed at equiangular intervals. The motor side elastic member 7 is formed to be slightly longer than the axial length of the motor side holding portion 1g. Moreover, the end surface (left side end surface in FIGS. 1 to 3) of the motor-side elastic member 7 constitutes a regulating surface 7b.

  The pump side elastic member 8 is made of a rubber material. The pump-side elastic member 8 is formed in a substantially bottomed cylindrical shape into which the small-diameter portion 6a of the impeller shaft 6 can be inserted, and has a pump-side protrusion 8a as a plurality of protrusions in the circumferential direction on the outer periphery thereof. Six pump side protrusions 8a of the present embodiment are formed. Moreover, the pump side protrusions 8a are formed at equiangular intervals. Further, a flange portion 8b extending radially outward is formed at the opening of the pump-side elastic member 8. Further, the end surface of the pump-side elastic member 8 (the end surface of the flange portion 8b and the right end surface in FIGS. 1 to 3) constitutes a regulating surface 8c. The motor-side elastic member 7 and the pump-side elastic member 8 are set so as to have good elasticity when the temperature of the cooling water rises (at 65 ° C.).

  The impeller shaft 6 has a base end portion fitted into the motor side elastic member 7, a small diameter portion 6a fitted into the pump side elastic member 8, and the motor side elastic member 7 fitted into the motor side holding portion 1g. The pump-side elastic member 8 (excluding the flange portion 8b) is fitted and held in the pump-side holding portion 3h to be float-supported. The motor-side elastic member 7 and the pump-side elastic member 8 are fitted so that the plurality of motor-side protruding portions 7a and the pump-side protruding portion 8a are pressed against the motor-side holding portion 1g and the pump-side holding portion 3h. The

  At this time (when the pump side case 3 is fixed to the motor side case 1), the impeller member 5 is accommodated in the pump chamber P. Specifically, the impeller member 5 includes an impeller body 21, an inner ring magnet 22 that is the other of the coupling magnets, and a bearing (metal bearing) 23.

  The impeller main body 21 is disposed in the pump chamber constituting portion 1i (between the small-diameter tubular portion 1d and the support tubular portion 1f) extending in a tubular shape from the impeller portion 21a and the impeller portion 21a disposed inside the pump tubular portion 3a. The impeller cylinder portion 21b. The inner ring magnet 22 is formed in a cylindrical shape, and is fitted and fixed to the outer peripheral surface of the impeller cylinder portion 21b. The bearing 23 is formed in a cylindrical shape, and is fitted and fixed to the inner peripheral surface of the central hole of the impeller portion 21a.

  And the impeller member 5 is rotatably supported by the bearing 23 being rotatably fitted to the impeller shaft 6. The impeller member 5 is restricted from moving in the other axial direction (rightward in FIGS. 1 and 2) when the bearing 23 comes into contact with the restriction surface 7b. Further, the impeller member 5 is restricted from moving further in one axial direction (leftward in FIGS. 1 and 2) when the bearing 23 comes into contact with the restriction surface 8c. Further, the impeller portion 21a is formed by connecting a plurality of wing portions arranged in an annular shape. When the impeller portion 21a is rotated, the impeller portion 21a draws fluid existing in the axial direction and radiates radially outward. Further, the impeller member 5 is subjected to thrust in the direction of the inlet 3e (leftward in FIGS. 1 and 2) when driven (rotated).

  The fluid pump device according to the present embodiment includes a radiator in parallel with a mechanical pump (which is driven based on the drive of the engine (E / G) and circulates cooling water) in a vehicle or the like that employs an idle stop system. (The motor case is fixed). The fluid pump device circulates the cooling water at the time of idling stop (when the engine is not driven) or the like. That is, in the fluid pump device, when power is supplied to the motor body 4, the armature 13 is driven to rotate. Then, the outer ring magnet 17 is rotated together with the rotating shaft 14, and the driving force of the motor body 4 is transmitted to the impeller member 5 in a non-contact manner by the magnetic action between the outer ring magnet 17 that is a coupling magnet and the inner ring magnet 22. Is rotated. Then, the cooling water (fluid) on the inflow cylinder portion 3c side is drawn into the pump chamber P and discharged to the outflow cylinder portion 3d side, and the cooling water is circulated.

Next, characteristic effects of the above embodiment will be described below.
(1) The impeller shaft 6 that rotatably supports the impeller member 5 is float-supported with respect to the motor case (the motor side case 1, the motor side cover 2, and the pump side case 3), so that the impeller member 5 becomes the motor case. Is supported by a float. Therefore, it is possible to reduce the vibration caused by the unbalance of the impeller member 5 and the magnetic circuit of the motor body 4 from the impeller member 5 to the motor case. Therefore, the indoor noise etc. in the vehicle provided with the fluid pump device can be reduced.

  (2) The impeller shaft 6 is float supported by being fixed to the motor case via the motor side elastic member 7 and the pump side elastic member 8. Therefore, the impeller shaft 6 can be float-supported easily and reliably. The motor-side elastic member 7 and the pump-side elastic member 8 are made of a rubber material, and are set so as to have good elasticity (soften) when the temperature of the cooling water rises (at 65 ° C.). There is a vibration reduction effect shown in FIG. That is, assuming that the vibration of the motor case when the impeller shaft 6 is rigidly fixed to the motor case without being float-supported (conventional) is 1, in the fluid pump device of this embodiment, the motor case when the cooling water is at room temperature Vibration of the motor case when the cooling water was 65 ° C. was 0.44. In other words, the fluid pump device of the present embodiment has a 30% vibration reduction effect when the cooling water is at room temperature, and a 56% vibration reduction effect when the cooling water is 65 ° C.

  (3) The impeller member 5 has a bearing 23 that is rotatably fitted to the impeller shaft 6. Since the impeller shaft 6 has a centering function by being float-supported, the axial direction of the bearing 23 When the end portion is in sliding contact with the non-rotating member (in the present embodiment, the regulating surfaces 7b and 8c), the local increase in surface pressure is reduced. Therefore, abnormal wear of the bearing 23 can be reduced, and its durability and the like can be improved.

  (4) Since the motor-side elastic member 7 and the pump-side elastic member 8 have restriction surfaces 7b and 8c that restrict the movement of the impeller member 5 in the axial direction by contacting the bearing 23, separate members such as washers are required. In addition, the number of parts can be reduced. Further, abnormal wear at the axial end of the bearing 23 can be further reduced.

  (5) The motor-side elastic member 7 and the pump-side elastic member 8 have a plurality of motor-side protrusions 7a and pump-side protrusions 8a in the circumferential direction on the outer periphery, and the plurality of motor-side protrusions 7a and The pump-side protruding portion 8a is internally fitted so as to be in press contact with the motor-side holding portion 1g and the pump-side holding portion 3h. If it does in this way, since the contact part of the motor side holding | maintenance part 1g and the pump side holding | maintenance part 3h, the motor side elastic member 7, and the pump side elastic member 8 becomes a plurality of points in the circumferential direction, vibration (force) will be disperse | distributed and vibration Is further reduced from the impeller member 5 to the motor case.

  (6) Since the plurality of motor-side protrusions 7a and the pump-side protrusions 8a are provided at equal angular intervals in the circumferential direction, the contact portions between the motor-side holding portion 1g and the pump-side holding portion 3h are spaced at equal angular intervals in the circumferential direction. The transmission of vibration from the impeller member 5 to the motor case is reduced in a well-balanced manner.

  (7) Since both ends of the impeller shaft 6 are fixed to the motor case via the motor-side elastic member 7 and the pump-side elastic member 8, only one end is fixed to the motor case via the elastic member (the other end is The impeller shaft 6 can be float-supported easily while preventing the impeller shaft 6 from falling over compared to a case where the impeller shaft 6 is not fixed.

  (8) The motor-side elastic member 7 and the pump-side elastic member 8 arranged at both ends of the impeller shaft 6 have different numbers of protrusions on one side and the other side (eight motor-side protrusions 7a, pump-side protrusions) 8a is 6 and their angles do not coincide with each other), so that the vibration (force) is further dispersed and the transmission of vibration from the impeller member 5 to the motor case is further reduced.

The above embodiment may be modified as follows.
In the above embodiment, the impeller shaft 5 that rotatably supports the impeller member 5 is float-supported with respect to the motor case, so that the impeller member 5 is float-supported with respect to the motor case. However, the impeller member is the motor case. However, it is not limited to this as long as it is float supported. For example, the impeller shaft may be rigidly fixed to the motor case without being float supported, and the impeller member may be float supported with respect to the impeller shaft. Further, for example, a rotary impeller shaft that rotates integrally with the impeller member may be provided (in place of the impeller shaft 6), and the rotary impeller shaft may be float supported so as to be rotatable with respect to the motor case.

  In the above embodiment, the impeller shaft 6 is float-supported by being fixed to the motor case via the motor-side elastic member 7 and the pump-side elastic member 8, but a member other than the elastic member is used or another mechanism The impeller member may be float supported. For example, the impeller member may be float supported with respect to the motor case by a magnetic bearing that is supported in a non-contact manner.

  In the above embodiment, the impeller member 5 includes the bearing 23 that is rotatably fitted to the impeller shaft 6, and the motor-side elastic member 7 and the pump-side elastic member 8 are in contact with the bearing 23. Although the control surfaces 7b and 8c for controlling the axial movement of the impeller member 5 are provided, these structures may be changed. For example, you may carry out by providing separately the washer which controls the movement of the impeller member 5 in the axial direction by contact | abutting with the bearing 23 in the edge part of the motor side elastic member 7 and the pump side elastic member 8. FIG.

  In the above embodiment, the motor-side elastic member 7 and the pump-side elastic member 8 have a plurality of motor-side protrusions 7a and a pump-side protrusion 8a. However, if the impeller shaft 6 can be float supported, a plurality of motors You may change into the motor side elastic member and pump side elastic member which do not have the side protrusion part 7a and the pump side protrusion part 8a.

  In the above embodiment, the impeller shaft 6 is fixed to the motor case (float supported) via the motor-side elastic member 7 and the pump-side elastic member 8, but only one end of the impeller shaft. May be changed to a configuration in which the float is supported (the other end is not supported).

  In the above embodiment, the motor-side elastic member 7 and the pump-side elastic member 8 arranged at both ends of the impeller shaft 6 have different numbers of protrusions on one side and the other (eight motor-side protrusions 7a, Although the number of pump side protrusions 8a is six), the number of motor side protrusions and the number of pump side protrusions may be changed. For example, six motor side protrusions and five pump side protrusions may be provided. Further, for example, the number of motor side protrusions and the number of pump side protrusions may be the same (for example, six each). In this case, it is desirable to arrange so that the angles of the (all) protrusions are shifted from each other. Even in this case, the two elastic members arranged at both ends of the impeller shaft are arranged so that the angle of the projecting portion is shifted between one and the other, so that the vibration (force) is dispersed and the vibration is impeller member. Is further reduced from being transmitted to the motor case.

  In the above-described embodiment, the driving force of the motor body 4 is reduced by the coupling magnets (the outer ring magnet 17 and the inner ring magnet 22) provided on the rotor of the motor body 4 (the rotation shaft 14 of the armature 13) and the impeller member 5. Although it is transmitted by contact, it may be changed to another configuration as long as the driving force of the motor is transmitted to the impeller member without contact. For example, by providing a rotor (for example, a rotor magnet) on an impeller member with respect to a motor stator (for example, a brushless motor stator that generates a rotating magnetic field) fixed to a motor case, the driving force of the motor is made non-contact. May be transmitted to the impeller member.

  That is, you may change as shown in FIGS. As shown in FIG. 5, the fluid pump device includes a motor-side case 31, a motor-side cover 32, a pump-side case 33, a brushless motor 34 (stator 34a, rotor 34b) as a motor, an impeller member 35, The impeller shaft 36 includes a motor-side elastic member 37 and a pump-side elastic member 38 as elastic members. In this example, the motor side case 31, the motor side cover 32 and the pump side case 33 constitute a motor case.

  The motor-side case 31 includes a substantially cylindrical cylindrical portion 31a and a partition wall 31b that partitions the inside thereof. In addition, a holding recess 31c is formed in the center of the partition wall 31b as a holding portion that opens circularly on one opening side (upper side in FIG. 5) of the cylindrical portion 31a.

  As shown in FIG. 5, a stator of a brushless motor 34 is provided in a motor housing part 31d (partitioned by a partition wall 31b) formed on the other opening side (lower side in FIG. 5) of the cylindrical part 31a. 34a is accommodated, and the motor side cover 32 covering the opening is fixed to the other opening side end of the cylindrical portion 31a.

  The pump-side case 33 includes a lid portion 33a that is fixed so as to substantially cover one of the cylindrical portions 31a (upper in FIG. 5), and one axially extending from the center of the lid portion 33a (upward in FIG. 5). ) And a large-diameter cylindrical portion 33b extending in a substantially cylindrical shape, and an inflow cylindrical portion 33c extending from the large-diameter cylindrical portion 33b to one side in the axial direction (upward in FIG. 5) and further extending in a substantially cylindrical shape. . Further, an outflow cylindrical portion 33d that communicates with the outside (extends to the back side in FIG. 5) is formed on a part of the outer edge (the left portion in FIG. 5) of the lid portion 33a of the pump-side case 33. . In this example, the front end portion of the inflow tube portion 33c is an inflow port 33e, and the front end portion of the outflow tube portion 33d is an outflow port 33f.

  As shown in FIG. 6, a support member 41 is fixed to the large diameter cylindrical portion 33 b of the pump side case 33. The support member 41 includes a cylindrical portion 41a (see FIG. 8) fitted into the large-diameter cylindrical portion 33b, and a plurality (three) of inwardly extending portions 41b extending in the circumferential direction from the inner wall of the cylindrical portion 41a to the axial center side. (See FIGS. 7 and 8), a claw portion 41c extending from each inner extension portion 41b to the other in the axial direction (downward in FIG. 6), and a tip of each inner extension portion 41b are connected to each other on the axis center. And a connection center portion 41d. The connection center portion 41d is formed in a tapered conical shape toward the inflow port 33e.

  The impeller shaft 36 is float-supported (with respect to the motor case) by supporting both ends of the impeller shaft 36 by the holding recess 31c and the claw portion 41c via the motor-side elastic member 37 and the pump-side elastic member 38.

  The motor-side elastic member 37 is made of a rubber material, is formed in a substantially bottomed cylindrical shape into which the motor-side small diameter portion 36a of the impeller shaft 36 can be inserted, and a plurality (eight) protrusions in the circumferential direction on the outer periphery thereof. Motor side protrusion 37a. Further, the opening side end surface (the upper end surface in FIG. 6) of the motor side elastic member 37 constitutes a regulating surface 37b.

  The pump-side elastic member 38 is made of a rubber material, and is formed in a substantially bottomed cylindrical shape into which the pump-side small diameter portion 36b of the impeller shaft 36 can be inserted. Further, a flange portion 38 a extending outward in the radial direction is formed in the opening of the pump side elastic member 38. Further, the opening-side end surface of the pump-side elastic member 38 (the end surface of the flange portion 38a, which is the lower end surface in FIG. 6) constitutes a regulating surface 38b, and the non-opening-side end surface of the flange portion 38a is the claw portion 41c. A contact surface 38c).

  The impeller shaft 36 has a motor-side small diameter portion 36a fitted into the motor-side elastic member 37, a pump-side small diameter portion 36b fitted into the pump-side elastic member 38, and the motor-side elastic member 37 is held by the holding recess 31c. The pump side elastic member 38 is supported by the plurality of claw portions 41c and is held by the float.

  As shown in FIG. 5, the rotor 34b of the brushless motor 34 and the impeller member 35 are both fixed so that the disk-shaped substrate portions 34c and 35a overlap each other, and the center hole (specifically, the substrate portion 34c) has a central hole. A bearing 42 is fixed to the inner peripheral surface, and the bearing 42 is rotatably supported by being rotatably fitted to the impeller shaft 36. The rotor 34b has a cylindrical portion 34d extending from the outer edge of the substrate portion 34c toward the counterflow inlet 33e, and the cylindrical portion 34d is disposed outside the stator 34a via a partition wall 31b. The impeller member 35 has a plurality of (substantially radial) wings 35b erected from the base plate part 35a toward the inflow port 33e, and the wings 35b face the lid 33a of the pump side case 33. To be arranged. In this example, the flange portion 38a of the pump-side elastic member 38 is set to be disposed so as to overlap the substrate portion 35a of the impeller member 35 in the axial direction (inside the center hole of the substrate portion 35a). Yes.

  Even in this case, since the impeller shaft 36 is float-supported with respect to the motor case, vibrations caused by the unbalance of the impeller member 35 and the magnetic circuit of the brushless motor 34 may be transmitted from the impeller member 35 to the motor case. Reduced.

  The pump-side elastic member 38 is formed in a substantially bottomed cylindrical shape into which the impeller shaft 36 (pump-side small-diameter portion 36b) can be fitted, and the motor case (the support member 41 of the pump-side case 33) has a pump side. A plurality of claw portions 41c are provided in the circumferential direction for supporting the outer periphery of the elastic member 38 at a plurality of points in the circumferential direction. If it does in this way, since the contact part of claw part 41c and pump side elastic member 38 becomes a plurality of points in the peripheral direction, vibration (force) is distributed and it is further reduced that vibration is transmitted from impeller member 35 to a motor case. The Moreover, it is not necessary to complicate the shape of the pump-side elastic member 38 (form a plurality of protrusions in the circumferential direction) as compared with the above embodiment, and the shape can be made simple.

  Further, the plurality of claw portions 41c are provided on the plurality of inwardly extending portions 41b in the circumferential direction extending from the inner wall of the inflow path (a cylindrical portion communicating from the inflow port 33e to the impeller member 35) toward the axial center. Therefore, as in the above-described embodiment, the cylindrical holding portion flows in like a configuration in which a plurality of protrusions are formed in the circumferential direction on the outer periphery of the pump-side elastic member and the elastic member is fitted into the cylindrical holding portion. It is possible to avoid narrowing the road. That is, a wide inflow path can be ensured while making contact portions with the pump-side elastic member 38 at a plurality of points in the circumferential direction. As a result, an increase in pressure loss can be suppressed.

  Furthermore, since the connection center part 41d which connects them and is arrange | positioned on an axial center is formed in the front-end | tip of the several extension part 41b, the rigidity of the some extension part 41b becomes high. Further, it is possible to prevent the position of the claw portion 41c provided in the inwardly extending portion 41b from being shifted. Moreover, since the connection center portion 41d is formed in a tapered conical shape toward the inflow port 33e, an increase in pressure loss can be suppressed.

  In addition, since the number of the claw portions 41c is three, the claw portions 41c (inwardly extending portions 41b) narrow the inflow passage while securely supporting the outer periphery of the pump-side elastic member 38 at three points in the circumferential direction. Can be minimized. As a result, an increase in pressure loss can be suppressed.

  Further, the flange portion 38a of the pump-side elastic member 38 is arranged so as to overlap the substrate portion 35a of the impeller member 35 in the axial direction, in other words, because it is not arranged in the flow path connecting the inflow port 33e and the wing portion 35b. It can be avoided that the flange portion 38a narrows the flow path. That is, it is possible to secure a wide flow path that connects the inflow port 33e and the wing portion 35b. As a result, an increase in pressure loss can be suppressed.

  Of course, the number (8) of the motor-side protrusions 37a of the motor-side elastic member 37 is different from the number (three) of the claw portions 41c that support the pump-side elastic member 38 (the number of contact portions is respectively). Therefore, vibration (force) is further dispersed, and transmission of vibration from the impeller member 35 to the motor case is further reduced.

  Note that the shape of the connection center portion 41d in this example may be changed or deleted. Further, the support member 41 (claw portion 41 c) may be integrally formed with the pump side case 33. Moreover, you may change the number of the nail | claw parts 41c.

In the above embodiment, the fluid pump device for a vehicle engine cooling device has been embodied. However, the fluid pump device may be embodied in other applications.
The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.

(B) it characterized in that 3 was Tsunishi the number of pre-tight unit. If it does in this way, it can minimize that an nail | claw part (inner extension part) narrows an inflow path, supporting the outer periphery of an elastic member reliably at three points in the circumferential direction. As a result, an increase in pressure loss can be suppressed.

(B) the opening of the front Symbol elastic member side where the impeller shaft is inserted, a flange portion having at least one abutment surface and the regulating surface abutting on the claw portion in the axial direction, the impeller The member has a disk-shaped substrate portion and a plurality of wing portions standing on the inlet side from the substrate portion, and the flange portion is arranged to overlap the substrate portion in the axial direction. the shall be the feature.

If it does in this way, an elastic member can acquire at least one of the effect that an axial direction movement is controlled with respect to a nail | claw part by the contact surface, and the effect of the invention of Claim 9 . In addition, the flange portion is arranged so as to overlap the substrate portion of the impeller member in the axial direction. Can be avoided. That is, it is possible to secure a wide flow path that connects the inlet and the wing portion. As a result, an increase in pressure loss can be suppressed.

(C) driving force before SL motor, characterized in that it is transmitted in a non-contact manner by coupling the magnet provided on the rotor and the impeller member of the motor. If it does in this way, the driving force of a motor will be transmitted by non-contact by the coupling magnet provided in the rotor and impeller member of the motor.

(D) driving force before SL motor, to the stator of the motor fixed to the motor case, characterized in that it is transmitted without contact by providing a rotor in the impeller member. If it does in this way, with the rotor of an impeller member being provided with respect to the stator of the motor fixed to a motor case, the driving force of a motor will be transmitted by non-contact.

The principal part sectional drawing of the fluid pump apparatus in this Embodiment. The principal part expanded sectional view of the fluid pump apparatus in this Embodiment. The disassembled perspective view of the impeller shaft and elastic member in this Embodiment. The graph for demonstrating the vibration reduction effect. The principal part sectional drawing of the fluid pump apparatus in another example. The principal part expanded sectional view of the fluid pump apparatus in another example. The principal part end view which looked at the fluid pump apparatus in another example from the axial direction inlet_port | entrance outer side. FIG. 7 is a cross-sectional view taken along line AA in FIG. 6 excluding an impeller member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,31 ... Motor side case which comprises a part of motor case, 1g ... Motor side holding part (holding part), 2, 32 ... Motor side cover which constitutes a part of motor case, 3, 33 ... Motor case Pump side case constituting part, 3h ... pump side holding part (holding part), 4 ... motor body (motor), 5,35 ... impeller member, 6,36 ... impeller shaft, 7, 37 ... motor side elastic member (Elastic member), 7a, 37a ... motor side protruding portion (projecting portion), 7b, 37b ... regulating surface, 8, 38 ... pump side elastic member (elastic member), 8a ... pump side protruding portion (projecting portion), 8c , 38b ... restriction surface, 23, 42 ... bearing, 31c ... holding recess (holding part), 33e ... inflow port, 41b ... inwardly extending part, 41c ... claw part, 41d ... connection center part.

Claims (11)

In the motor case, the motor and the impeller member are accommodated in the motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner.
By supporting the impeller shaft rotatably supporting the impeller member with respect to the motor case, the impeller member is float supported with respect to the motor case ,
The impeller shaft is float supported by fixing to the motor case via an elastic member,
Both ends of the impeller shaft are fixed to the motor case via the elastic members, respectively, and the two elastic members arranged at both ends of the impeller shaft have different numbers of protrusions on one side and the other side. A fluid pump device. In the motor case, the motor and the impeller member are accommodated in the motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner .
By supporting the impeller shaft rotatably supporting the impeller member with respect to the motor case, the impeller member is float supported with respect to the motor case ,
The impeller shaft is float supported by fixing to the motor case via an elastic member,
Both ends of the impeller shaft are fixed to the motor case via the elastic members, respectively, and the two elastic members arranged at both ends of the impeller shaft are arranged such that the angle of the projecting portion is shifted between one and the other. A fluid pump device, wherein the fluid pump device is arranged . The fluid pump device according to claim 1 or 2 ,
The fluid pump device according to claim 1, wherein the impeller member includes a bearing that is rotatably fitted to the impeller shaft. The fluid pump device according to claim 3 ,
The fluid pump device according to claim 1, wherein the elastic member has a restricting surface that restricts movement of the impeller member in an axial direction by contacting the bearing. The fluid pump device according to any one of claims 1 to 4 ,
Forming a holding part for holding the elastic member in the motor case,
The elastic member is formed in a substantially cylindrical shape into which the impeller shaft can be inserted, and has a plurality of protrusions in the circumferential direction on the outer periphery thereof, such that the plurality of protrusions are pressed against the holding portion. A fluid pump device fitted into the holding portion. The fluid pump device according to claim 5 ,
A fluid pump device characterized in that the plurality of protrusions are provided at equal angular intervals in the circumferential direction. In the motor case, the motor and the impeller member are accommodated in the motor case, and the driving force of the motor is transmitted to the impeller member in a non-contact manner.
By supporting the impeller shaft rotatably supporting the impeller member with respect to the motor case, the impeller member is float supported with respect to the motor case,
The impeller shaft is float supported by fixing to the motor case via an elastic member,
The elastic member is formed in a substantially cylindrical shape into which the impeller shaft can be inserted,
The fluid pump device according to claim 1, wherein the motor case is provided with a plurality of claw portions in a circumferential direction for supporting the outer periphery of the elastic member at a plurality of points in the circumferential direction. The fluid pump device according to claim 7,
The fluid pump device according to claim 1, wherein the impeller member includes a bearing that is rotatably fitted to the impeller shaft. The fluid pump device according to claim 8, wherein
The fluid pump device according to claim 1, wherein the elastic member has a restricting surface that restricts movement of the impeller member in an axial direction by contacting the bearing. The fluid pump device according to any one of claims 7 to 9 ,
The plurality of claw portions are provided in a plurality of inwardly extending portions in a circumferential direction extending from the inner wall of the inflow passage toward the axial center side. A fluid pump apparatus according to claim 1 0,
At the tips of the plurality of inwardly extending portions, there is formed a connection center portion that connects them and is arranged on the shaft center, and the connection center portion is formed in a tapered conical shape toward the inflow port side. A fluid pump device characterized by that.

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