JP6034069B2 - Cascade pump device - Google Patents

Description

  The present invention relates to a cascade pump apparatus having a configuration in which a suction pipe and a discharge pipe communicating with a pump chamber protrude in parallel with each other from a side surface of a pump case.

  Patent Document 1 discloses a cascade pump device for liquid pumping called a vortex pump or a cascade pump. The cascade pump device of this document includes a pump chamber, an impeller, a magnetic drive mechanism that rotates the impeller by exciting a drive coil, and a pump case on which these are mounted. The pump case has a flat cylindrical shape, and a suction pipe and a discharge pipe communicating with the pump chamber protrude from the side surface of the pump case in parallel with each other. In this document, the magnetic drive mechanism is a motor, and a cable for supplying an excitation current to a drive coil of the motor is drawn radially outward from a lower end surface where the motor of the pump case is disposed. In this document, the cable drawing position is opposite to the formation positions of the suction pipe and the discharge pipe, and the protruding direction of the suction pipe and the discharge pipe is opposite to the cable drawing direction.

JP 2004-176659 A

  Here, when the cascade pump device of Patent Document 1 is mounted on an external device, a space for routing a pipe such as a hose connected to the suction pipe and the discharge pipe is provided on one side across the pump case. A space for routing the wiring drawn from the pump case must be provided on the other side, which is the opposite side of this side. For this reason, there exists a problem that the mounting space of a cascade pump apparatus will become large.

  In view of the above problems, an object of the present invention is to provide a cascade pump device capable of reducing the mounting space.

  In order to solve the above-mentioned problems, a cascade pump device according to the present invention includes an annular pump chamber, an annular impeller disposed coaxially in the pump chamber, and an impeller by exciting a drive coil. A rotating magnetic drive mechanism; and a pump case that houses the pump chamber, the impeller, and the magnetic drive mechanism, the pump case having two end faces positioned at both ends in an axial direction; and the two end faces An intermediate portion between the suction pipe and the discharge pipe communicating with the pump chamber, and a wiring take-out for taking out a wiring for supplying an excitation current to the drive coil. The suction pipe and the discharge pipe protrude in the same direction parallel to each other along a plane orthogonal to the axis, and the wiring take-out section takes the wiring to the outside. A wiring drawing guide portion for defining a wiring drawing direction to be drawn out, and an angle formed by the wiring drawing direction and a protruding direction of the suction pipe and the discharge pipe is less than 90 ° around the axis. To do.

  According to the present invention, the suction pipe and the discharge pipe extending in the same direction parallel to each other and the wiring take-out portion are provided between the two end faces located at both ends in the axial direction of the pump case, and the wiring The wiring drawing direction of the wiring taken out from the take-out portion is defined as an angle direction of less than 90 ° around the axis from the protruding direction of the suction pipe and the discharge pipe. Therefore, when the cascade pump device is mounted on an external device, a space for drawing piping such as a hose connected to the suction pipe and the discharge pipe on one side of the pump case from which the suction pipe and the discharge pipe protrude and the pump case It is only necessary to provide a space for routing the wiring drawn out from the wiring. That is, since it is not necessary to provide a space for routing the wiring on the other side of the pump case, the mounting space can be reduced accordingly. In addition, according to the present invention, since the wiring take-out portions are provided in the intermediate portion between the two end faces located at both ends in the axial direction of the pump case, the wiring is within the range of the height in the axial direction of the pump case. Can be taken out with. Therefore, it is not necessary to provide a space for routing the wiring in a position adjacent to the pump case in the axial direction, and accordingly, the mounting space can be suppressed.

  In the present invention, the suction pipe, the discharge pipe, and the wiring take-out part are provided in the order of the suction pipe, the discharge pipe, and the wiring take-out part around the axis, or the discharge pipe around the axis It is desirable that the pipe, the suction pipe, and the wiring extraction portion are provided in this order. In this way, in the cascade pump device including the annular impeller and the pump chamber, the angle around the axis from the suction pipe to the discharge pipe can be increased, so that the pressure for pumping the liquid is improved. Therefore, even if a wiring take-out portion for routing the wiring in the protruding direction of the suction pipe and the discharge pipe is provided, an increase in size of the pump case can be suppressed.

  In this invention, the said intermediate part is equipped with the outer peripheral surface which comprises the outline of the said pump case when it sees from the said axial direction, The said wire extraction part is from the outer peripheral surface which comprises the said outline. Is also preferably provided on the inside. That is, the wiring extraction part is disposed inside the outline of the pump case when viewed from the axial direction. In this way, when routing the wiring taken out from the wiring lead-out portion, it is possible to reduce the routing space near the contour of the pump case, so that interference between external equipment and wiring when mounting the cascade pump device Can be suppressed.

  In the present invention, the intermediate portion is arranged next to each other around the axis, and constitutes a part of the contour of the pump case when viewed from the axial direction, and the first side A first output angle formed between a side surface and the second side surface, wherein the magnetic drive mechanism is configured radially inward of the pump chamber, and the suction pipe and the discharge pipe Preferably protrudes from the first side surface, and the wiring take-out portion is preferably provided inside the first exit angle. When the pump case has an exit angle, a dead space is formed between the annular pump chamber and the exit angle. Therefore, if the wiring extraction portion is provided using such a dead space, the pump case does not increase in size.

  In the present invention, the first output angle may be formed with an inclined surface extending in the axial direction intersecting the first side surface and the second side surface by notching a tip of the first output angle. desirable. If it does in this way, the wiring taken out from the wiring extraction part can be pulled out in an axial direction along an inclined surface. In addition, the wiring drawn out along the inclined surface can be positioned inside the contour of the outgoing angle formed by the first side surface and the second side surface when the pump case is viewed from the axial direction.

  In this case, the intermediate portion includes a wiring direction regulating portion that regulates a direction of the wiring drawn out along the inclined surface after being taken out of the pump case from the wiring taking-out portion, and the wiring It is desirable that the direction restricting portion is located inside the contour of the exit angle formed by extending and intersecting the first side surface and the second side surface. If it does in this way, when mounting a cascade pump apparatus, it can prevent that the wiring routed through an inclined surface and a wiring direction control part interferes with an external apparatus.

  In this case, it is preferable that the wiring direction restricting portion extends in a direction perpendicular to the axis along the inclined surface at an intermediate position in the axial direction of the inclined surface. In this way, the wiring drawn out along the inclined surface and routed through the wiring direction restriction portion is removed from the pump case from the portion in contact with the wiring direction restriction portion using the wiring direction restriction portion. When bending away from the pump case, bend the wiring at a position that does not protrude from the range of the axial height of the pump case, that is, at a position between the two end faces located at both ends in the axial direction of the pump case, Can be routed.

  In the present invention, the pump case preferably has a quadrangular prism shape. In the quadrangular prism-shaped pump case, the corner portion becomes a dead space between the annular pump chamber. Therefore, if the wiring extraction portion is provided using such a dead space, the pump case does not increase in size.

  In this case, the first exit angle is formed with an inclined surface extending in the axial direction by intersecting the first side surface and the second side surface by cutting out the tip of the exit angle, Is provided with a wiring direction restricting portion for restricting the direction of the wiring drawn out along the inclined surface after being taken out of the pump case from the wiring extracting portion, A hook provided with a gap for locking the wiring between the first side surface and the second side surface extending from each other and intersecting with each other. It is desirable that In this way, using the hook, the wiring does not protrude from the range of the axial height of the pump case, that is, the position between the two end faces located at both ends of the axial direction of the pump case. It can be bent and routed away from the pump case.

  In the present invention, in the pump case, an inner side of a second output angle between a third side surface adjacent to the first side surface on the side opposite to the second side surface around the axis, and the second output angle. It is desirable that an attachment hole for attaching the pump case to an external device is formed inside the third outgoing angle located diagonally. In this way, each mounting hole is provided by using the exit angle that becomes a dead space with the annular pump chamber in the quadrangular prism-shaped pump case, so even if the mounting hole is provided, the pump The case does not increase in size.

  In the present invention, the pump case includes a first case and a second case, and the pump chamber is partially in a direction in which the first case and the second case are orthogonal to the axis. The pump case is partitioned by being stacked, and the pump case is provided with a first fixing portion for fixing the first case and the second case with a screw. It is desirable that the fixing portion protrudes from the first side surface between the suction pipe and the discharge pipe. The space between the suction pipe and the discharge pipe extending in parallel is a space that becomes a dead space when the cascade pump apparatus is attached to an external device. Therefore, if the first fixing portion is protruded at such a position, the cascade pump apparatus When mounting, the first fixed portion does not interfere with external equipment.

  In this case, the pump case is provided with a second fixing portion and a third fixing portion for fixing the first case and the second case with screws, and the second fixing portion is It is preferable that the third fixed portion is formed inside the third outgoing angle, and the third fixing portion is formed inside the fourth outgoing angle located diagonally to the first outgoing angle. If it does in this way, since the 2nd fixed part and the 3rd fixed part are provided using the exit angle which becomes a dead space between the annular pump chambers in a quadrangular prism-shaped pump case, the 2nd fixed part Even when the portion and the third fixing portion are provided, the pump case does not increase in size.

  In this case, the pump case includes a first case and a second case, and the pump chamber partially overlaps the first case and the second case in a direction perpendicular to the axis. And an O-ring for preventing leakage of fluid from the pump chamber is arranged coaxially with the pump chamber between the first case and the second case. When the pump chamber is defined by stacking the first case and the second case inside the fourth output angle that is diagonally opposite the first output angle in the pump case, It is desirable that an anti-rotation mechanism that prevents relative rotation of the one case and the second case around the axis is configured. If the O-ring is twisted in the circumferential direction in a pressurized state, the possibility of damage increases. However, according to the present invention, the first case and the second case rotate relative to each other around the axis by the rotation prevention mechanism. Is prevented. Therefore, it is possible to prevent or reduce damage to the O-ring when the compartment of the pump chamber is formed. Here, the anti-rotation mechanism is provided by using a corner portion that becomes a dead space with the annular pump chamber in the quadrangular prism-shaped pump case, so even if the anti-rotation mechanism is provided, the pump case There is no increase in size.

  According to the present invention, when the cascade pump device is mounted on an external device, a space for routing a pipe such as a hose connected to the suction pipe and the discharge pipe on one side of the pump case and a wiring drawn from the pump case are routed. Since it is sufficient to provide a space, a mounting space can be reduced because it is not necessary to provide a space for routing the wiring on the other side of the pump case. In addition, according to the present invention, since the wiring take-out portions are provided in the intermediate portion between the two end faces located at both ends in the axial direction of the pump case, the wiring is within the range of the height in the axial direction of the pump case. Can be taken out with. Therefore, it is not necessary to provide a space for routing the wiring in a position adjacent to the pump case in the axial direction, and accordingly, the mounting space can be suppressed.

It is the perspective view and front view of a cascade pump device to which the present invention is applied. It is sectional drawing of the cascade pump apparatus to which this invention is applied. It is a disassembled perspective view of the cascade pump apparatus to which this invention is applied. It is a perspective view of a rotor and a stator. It is a perspective view of a lower case. It is a perspective view of an upper case. It is a fragmentary sectional view of the cascade pump apparatus which shows the lamination start time of an upper case and a lower case. It is explanatory drawing of the example of routing of a lead wire (wiring). It is explanatory drawing of the example which attaches a cascade pump apparatus to an external apparatus using a fixing member.

  Hereinafter, a cascade pump device according to an embodiment of the present invention will be described with reference to the drawings. In the following description, for convenience of explanation, the upper and lower parts of the cascade pump device will be described according to the upper and lower parts of the figure. Further, the side from which the suction pipe and the discharge pipe protrude is the front side (front) of the cascade pump apparatus, the opposite side is the rear side (rear), and the arrangement direction of the suction pipe and discharge pipe is the apparatus width direction.

(overall structure)
FIG. 1A is a perspective view of the cascade pump device to which the present invention is applied as seen from the upper front side, and FIG. 1B is a perspective view of the cascade pump device from the upper rear side. 1 (c) is a front view of the cascade pump device. The cascade (vortex) pump device 1 of this embodiment pumps liquid such as refrigerant. The cascade pump device 1 includes a flat quadrangular prism-shaped pump case 2 as a whole. The pump case 2 is made of resin and is made of PPS (polyphenylene sulfide) or the like.

  The pump case 2 includes an upper surface (end surface) 2a positioned at the upper end in the axis L direction, a lower surface (end surface) 2b positioned at the lower end in the axis L direction, and an intermediate portion 2z between the upper surface 2a and the lower surface 2b. The intermediate portion 2z is a front surface (first side surface) 2c which is a front side surface of the cascade pump device 1 as an outer peripheral surface constituting the contour of the pump case 2 when viewed from the axis L direction, and a left side in the device width direction. Side surface (second side surface) 2d, right side surface (third side surface) 2e in the apparatus width direction, and rear side surface (fourth side surface) 2f. A corner 2g between the front surface 2c and the left side surface 2d; between the front surface 2c and the right side surface 2e; between the left side surface 2d and the rear side surface 2f; between the right side surface 2e and the rear side surface 2f; 2h, 2i, and 2j are exit angles that are the angles protruding outward. The contour of the pump case 2 as viewed from the direction of the axis L defines the device width direction and the length direction perpendicular to the axis L of the pump case 2.

  From the front surface 2c of the pump case 2, a suction pipe 3 and a discharge pipe 4 protrude in parallel toward the front. The front left 2c of the pump case 2 and a front left corner portion (inside the first outgoing angle) 2g between the side surface 2d adjacent to the front surface 2c in the clockwise direction as viewed from the upper surface 2a centering on the axis L. Is provided with a wiring extraction portion 6 for extracting a lead wire (wiring) 5 from the inside of the pump case 2.

  The lead wire 5 is drawn obliquely forward from a midway position in the axis L direction (height direction) of the cascade pump device 1 via the wiring extraction portion 6. The lead wire 5 extends longer than the suction pipe 3 and the discharge pipe 4, and a connector 7 is attached to the tip thereof. Here, as shown in FIG. 1C, the suction pipe 3, the discharge pipe 4, and the wiring extraction part 6 are intermediate portions 2 z between the upper surface 2 a and the lower surface 2 b located at both ends in the axis L direction of the pump case 2. Is provided. In other words, the suction pipe 3, the discharge pipe 4, and the wiring extraction portion 6 are provided at positions within the height of the pump case 2. Further, when the pump case 2 is viewed from the projecting direction of the suction pipe 3 and the discharge pipe 4, the suction pipe 3, the discharge pipe 4, and the wiring take-out portion 6 are provided at positions where they can be seen.

  The front left corner portion 2g of the pump case 2 provided with the wiring take-out portion 6 extends in the direction of the axis L intersecting the front surface 2c and the side surface 2d by obliquely cutting off the tip of the corner portion 2g. An inclined surface 2k is provided. Further, the front left corner portion 2g is provided with a hook 8 for regulating the direction of the lead wire 5 when the lead wire 5 is routed along the inclined surface 2k. The hook 8 extends in a direction perpendicular to the axis L along the inclined surface 2k at the center position in the axis L direction of the inclined surface 2k. The hook 8 extends with a constant width from the front surface 2c side to the side surface 2d side, and a gap for locking the lead wire 5 is formed between the inclined surface 2k and the inclined surface 2k side of the hook 8. Has been. Here, when the lead wire 5 drawn along the inclined surface 2k is locked to the hook 8, the lead wire 5 is prevented from being lifted from the inclined surface 2k, and the position of the lead wire is defined. Further, when the lead wire 5 drawn out along the inclined surface 2k is locked to the hook 8, the lead-around direction of the lead wire 5 is defined downward along the inclined surface 2k. That is, the hook 8 functions as a wiring direction restricting portion that restricts the direction in which the lead wire 5 is routed.

  Front right corner part (inside the second outgoing angle) 2h between the front face 2c and the side face 2e adjacent to the front face 2c in the counterclockwise direction, and the rear left located at the opposite corner of the corner part 2h A mounting hole 9 for attaching the cascade pump device 1 to an external device is formed in the corner portion (inside the third outgoing angle) 2i.

  The pump case 2 includes a lower case (one of the first case and the second case) 11 and an upper case (the other of the first case and the second case) 12 stacked one above the other. . The suction pipe 3 and the discharge pipe 4 protrude from the front surface of the lower case 11. The wiring take-out portion 6 is provided at the front left corner of the upper case 12. The hook 8 is provided on the lower case 11. The lower case 11, the suction pipe 3, the discharge pipe 4, and the hook 8 are made of resin and are integrally formed by molding.

  Here, when the lower case 11 and the upper case 12 are laminated, the rear right corner portion (inside the fourth outgoing angle) 2j located diagonally to the wiring extraction portion 6 in the pump case 2 is relative to each other. An anti-rotation mechanism 13 (see FIG. 1B) for preventing the rotation is provided. Further, a case fixing portion (first fixing portion) 14 is provided between the suction pipe 3 and the discharge pipe 4 of the pump case 2 so as to protrude from the front surface 2c. The case fixing part 14 is a part for fixing the lower case 11 and the upper case 12 using screws 15.

  2A is a longitudinal sectional view of the cascade pump device 1 taken along line XX of FIG. 1A, and FIG. 2B is a view of the cascade pump device 1 taken along line YY of FIG. It is a longitudinal cross-sectional view. FIG. 3 is an exploded perspective view of the cascade pump device 1. 4A is a perspective view of the rotor, and FIG. 4B is a perspective view of the stator.

  As shown in FIGS. 2 and 3, the lower case 11 and the upper case 12 are laminated so as to partially overlap in a direction orthogonal to the axis L. A compartment 20 is formed between the lower case 11 and the upper case 12. In the compartment 20, a rotor 23 having an annular impeller 21 and a drive magnet 22 and a support shaft 24 that rotatably supports the rotor 23 are arranged. Further, the outer peripheral side portion of the compartment chamber 20 is an annular pump chamber 25, and the impeller 21 is inserted into the pump chamber 25. An O-ring 26 is disposed between the lower case 11 and the upper case 12 to prevent fluid leakage from the compartment 20. A stator 29 having a drive coil 27 and a stator core 28 on which the drive coil 27 is mounted on the upper side of the upper case 12, that is, on the side opposite to the compartment 20 side of the upper case 12 (the side opposite to the lower case 11). A substrate 30 on which an electronic element for controlling the excitation current to the drive coil 27 is mounted is disposed. The drive magnet 22 and the drive coil 27 constitute a magnetic drive mechanism for rotationally driving the impeller 21. The magnetic drive mechanism is configured on the inner peripheral side with respect to the axis L from the pump chamber 25.

  A liquid channel 31 is formed on the bottom surface and the ceiling surface of the pump chamber 25 over a predetermined angular range around the axis L. More specifically, a lower fluid flow path 31 a made of an arc groove having a semicircular cross-sectional shape is formed on the bottom surface of the pump chamber 25 defined by the lower case 11, and is defined by the upper case 12. On the ceiling surface of the pump chamber 25, there is formed an upper fluid flow path 31b composed of an arc groove having a semicircular cross-sectional shape. The lower fluid channel 31a and the upper fluid channel 31b overlap when viewed from the direction of the axis L. In this example, the liquid channel 31 is formed over an angular range exceeding 270 ° around the axis L.

  In the pump chamber 25, a suction port 3 a (see FIG. 5) through which the suction pipe 3 communicates is provided at a portion of the lower case 11 where one end of the liquid flow path 31 is located. The part of the lower case 11 where the is located is provided with a discharge port 4a (see FIG. 5) through which the discharge pipe 4 communicates. On the bottom surface of the pump chamber 25, the portion located between the suction port 3a and the discharge port 4a is a lower blocking portion 32a in which the lower fluid flow path 31a is not provided, as shown in FIG. ing. Similarly, on the ceiling surface of the pump chamber 25, a portion located between the suction port 3a and the discharge port 4a is an upper blocking portion 32b in which the upper fluid flow path 31b is not provided.

  The support shaft 24 is made of stainless steel, and a lower end portion thereof is fixed to a support shaft fixing recess 60 provided in the lower case 11. The upper end portion of the support shaft 24 is fixed to a support shaft fixing concave portion 82 at the center of the bottom portion 81 of the bottomed cylindrical central projecting portion 80 provided at the center portion of the upper case 12. Here, the height dimension in the direction of the axis L of the pump case 2 is a dimension from the lower surface 2b that is the bottom surface of the lower case 11 to the upper surface 2a of the upper case 12, and this height dimension is approximately the support shaft 24. , The thickness dimension from the lower surface 2b of the lower case 11 to the bottom surface of the support shaft fixing recess 60, and the thickness from the top surface of the bottom 81 of the central protrusion 80 to the bottom surface of the support shaft fixing recess 82 It is the sum of the dimensions, and the cascade pump device 1 is configured to be small in the axial direction. The upper surface 2 a of the upper case 12 is an upper end surface of a frame-shaped outer peripheral wall 86 provided in the upper case 12, and is formed in the front right corner portion 2 h and the rear left corner portion 2 i of the pump case 2. The flat surface around the upper end opening of the mounting hole 9 is a part of the upper surface 2a.

  The rotor 23 is made of resin made of PPS or the like, and is formed by molding. As shown in FIG. 4A, the rotor part 40 and a cylindrical bearing part 41 that protrudes upward from the center of the upper surface of the disk part 40. And a cylindrical portion 42 that protrudes upward from the upper surface of the disk portion 40 and coaxially surrounds the bearing portion 41 with a predetermined distance from the bearing portion 41. The predetermined interval between the bearing portion 41 and the cylindrical portion 42 is an interval at which the stator 29 can be received therebetween via the upper case 12. The rotor 23 can rotate around the axis L of the support shaft 24 in a state where the support shaft 24 is inserted into the center hole 41 a of the bearing portion 41 and the bearing portion 41 is disposed inside the central protrusion 80 of the upper case 12. It has become. Here, one or a plurality of washers 43 are inserted between the bearing portion 41 and the bottom portion 81 of the central protrusion 80, and the position of the rotor 23 in the direction of the axis L is adjusted by the insertion of the washers 43. (See FIG. 2). In this example, two washers are inserted. For example, by selecting one or two of the washer 43 having a thickness of 0.2 mm and the washer 43 having a thickness of 0.3 mm, The total thickness can be adjusted at intervals of 0.1 mm from 0.2 mm to 0.6 mm.

  A cylindrical yoke 44 is held on the inner peripheral surface of the cylindrical portion 42, and a cylindrical drive magnet 22 is held on the inner peripheral surface of the yoke 44. The yoke 44 is formed integrally with the rotor 23 by insert molding, and the drive magnet 22 is bonded and fixed to the yoke 44. In the disc part 40 arranged on the lower case 11 side, an impeller 21 is formed on the outer peripheral part of the outer peripheral side of the cylindrical part 42.

  Concave portions 45 formed in two upper and lower stages are formed on the outer peripheral portion of the impeller 21 at equal angular intervals in the circumferential direction. The concave portion 45 includes an upper concave portion 46 formed by cutting out the peripheral edge of the upper surface of the disk portion 40 in an arc shape, and a lower concave portion 47 formed by cutting out the peripheral edge of the lower surface of the disk portion 40 in an arc shape. Between the recesses 45 adjacent in the circumferential direction, there are blades 48 extending in the radial direction. Between the upper and lower recesses 46 and 47 adjacent in the vertical direction are ribs 49 that extend in the circumferential direction and divide the blades 48 in the vertical direction. The impeller 21 is inserted into the pump chamber 25 as shown in FIG.

  The stator 29 is disposed in a stator housing chamber 83 which is an annular recess provided on the outer peripheral side of the central protrusion 80 on the upper surface side of the upper case 12. As shown in FIG. 4B, the stator core 28 includes an annular portion 50 and a plurality of salient poles 51 projecting radially outward from the annular portion 50, and the drive coil 27 is provided on each of the salient poles 51. It is wound. As shown in FIG. 2, each salient pole 51 faces the drive magnet 22 of the rotor 23 in the compartment 20 via the upper case 12 in a direction orthogonal to the axis L. The upper case 12 is disposed between the rotor 23 and the stator 29 and functions as a partition wall that separates the pump chamber 25 and the stator 29.

  The stator core 28 is configured by laminating a plurality of identically shaped plate-like core pieces 52 formed by punching a thin plate-like magnetic steel plate in the vertical direction, and the lamination direction of the plate-like core pieces 52 is the direction of the axis L. It has become. On the inner peripheral surface of the annular portion 50 of the stator core 28, three inner concave portions 53 having a semicircular cross section perpendicular to the axis L are formed at equal angular intervals around the axis L. The three inner recesses 53 have the same shape, and all extend in the axis L direction. Each inner recess 53 has a constant depth in the radial direction, and the cross-sectional shape is the same at any position in the direction of the axis L.

  Here, as shown in FIG. 3, three stator fixing protrusions 85 are provided on the outer peripheral surface of the cylindrical portion 84 of the central protrusion 80 of the upper case 12 so as to protrude radially outward from a portion in the circumferential direction. The stator core 28 is fixed to the central protrusion 80 by press-fitting these stator fixing protrusions 85 into the inner recess 53 of the annular portion 50. Further, on the outer peripheral surface of the cylindrical portion 84 of the central projecting portion 80, the stator core 28 is brought into contact with the annular portion 50 of the stator core 28 from below in the axis L direction at a position different from the stator fixing projection 85 in the circumferential direction. A positioning portion 88 for positioning in the direction of the axis L is provided (see FIGS. 2 and 6), and the stator core 28 is positioned after the stator fixing projection 85 is press-fitted into the inner recess 53 of the annular portion 50. It abuts on 88 and is positioned in the axis L direction.

  More specifically, the three stator fixing protrusions 85 provided on the outer peripheral surface of the central protrusion 80 have a semicircular cross section perpendicular to the axis L, and are equiangular around the axis L of the support shaft 24. It is formed at intervals. The three stator fixing protrusions 85 have the same shape, extend in the direction of the axis L along the outer peripheral surface of the central protrusion 80, and extend from the bottom 81 toward the opening end. The taper surface which the protrusion amount to radial direction outer side and a circumferential direction increases is provided. The stator core 28 is dropped into the stator storage chamber 83 in a state in which the stator fixing projection 85 of the central protrusion 80 is inserted into the inner recess 53 of the annular portion 50. The lower end portion is fixed to the upper case 12 by being press-fitted into the inner concave portion 53 of the annular portion 50. In this example, the annular portion 50 is a positioning portion in a state where the lower end portion of the stator fixing projection 85 is press-fitted into the inner concave portion 53 of one annular portion 50 of the plate-shaped core piece 52 constituting the stator core 28. It abuts on 88 and is fixed.

  The board 30 is a printed board on which electronic elements for controlling the excitation current to the drive coil 27 and the like are mounted. The substrate 30 is disposed in an upper space 87 provided on the inner surface of a frame-shaped outer peripheral wall 86 that protrudes upward along the periphery of the upper surface of the upper case 12. The substrate 30 has an opening 30a at the center, and the upper surface side of the bottom 81 of the center protrusion 80 of the upper case 12 protrudes from the opening 30a. Accordingly, the substrate 30 is disposed below the upper end of the bottom 81 in the direction of the axis L. Further, the substrate 30 covers the stator 29 disposed in the stator storage chamber 83 from above. The lead wire 5 is soldered and connected to the surface of the substrate 30 on the side of the stator core 28, and the wiring to the drive coil 27 (not shown) is soldered and connected on the upper surface side of the substrate 30 (opening side of the outer peripheral wall 86). Has been. The lead wire 5 is drawn out to the outside of the pump case 2 via the wiring extraction portion 6.

  As shown in FIG. 3, the wiring take-out portion 6 includes a wiring take-out port 33 provided by cutting out the outer peripheral wall 86, and a lead wire 5 taken out from the inside of the pump case 2 through the wire take-out port 33. A wiring placement section 34 arranged and placed in a row and a lead wire 5 fixed on the upper case 12 so as to close the wiring outlet 33 from above the substrate 30 and arranged on the wiring placement section 34 are wired. A fixing member 35 is provided that is sandwiched between the mounting portion 34 and fixed in a pressed state. The wiring outlet 33 opens toward the corner portion 2g.

  Here, as shown in FIG. 1, the potting agent 16 as a sealing material is poured into the stator storage chamber 83 and the upper space 87 of the upper case 12 from above until reaching the upper surface 2 a that is the upper end surface of the outer peripheral wall 86. The stator 29 and the substrate 30 are covered and fixed by the potting agent 16. If the upper end surface of the potting agent 16 is set at the same height as or lower than the upper surface 2a, the cascade pump device 1 can be mounted side by side with other cascade pump devices 1 or externally as shown in FIG. When attaching to the fixing member 101, the pump case 2 can be fixed in contact with or close to another cascade pump device 1 or an external fixing member 101, so that the installation space of the cascade pump device 1 can be reduced. Can do. The potting agent 16 is an insulating resin such as epoxy, acrylic or silicon.

  When an excitation current is supplied from the connector 7 to the drive coil 27 via the lead wire 5 and the substrate 30, the rotor 23 rotates about the axis L. Thus, the liquid is sucked into the pump chamber 25 from the suction pipe 3, pressurized in the pump chamber 25, and discharged from the discharge pipe 4. The motor (rotor 23, stator 29, substrate 30) for driving the cascade pump device 1 of this example is a three-phase brushless motor, and a hall element (not shown) for detecting the position of the drive magnet 22 of the rotor 23 is provided on the substrate 30. Are arranged. When the order of the excitation currents supplied to the drive coil 27 is reversed, the rotor 23 rotates in the reverse direction, the liquid is sucked from the discharge pipe 4, pressurized in the pump chamber 25, and discharged from the suction pipe 3. .

(Lower case)
5A is a perspective view of the lower case 11 as viewed from above, and FIG. 5B is a perspective view of the lower case 11 as viewed from below. The lower case 11 includes a bottom plate portion 61, a side wall portion 62 that stands up from the outer peripheral side portion of the bottom plate portion 61 and extends upward, and a circular recess 63 formed by the bottom plate portion 61 and the side wall portion 62. The lower surface of the bottom plate portion 61 is the lower surface 2 b of the pump case 2. The contour shape of the side wall 62 viewed from the direction of the axis L is substantially rectangular, and the planar shape of the lower case 11 viewed from the direction of the axis L is substantially rectangular. The side wall 62 has a flat upper end surface 62 a, and the upper end surface 62 a is the upper end surface of the lower case 11. The pump chamber 25 is formed in an annular shape along the peripheral edge of the circular recess 63. A support shaft fixing recess 60 is provided at the center of the circular bottom surface of the circular recess 63.

  An annular recess 64 is formed coaxially with the support shaft fixing recess 60 on the outer peripheral side of the support shaft fixing recess 60. An inner annular projecting surface 65 is formed between the support shaft fixing recess 60 and the annular recess 64, and an outer annular projecting surface 66 is formed on the outer peripheral side of the annular recess 64. The outer annular projecting surface 66 is provided with a lower fluid flow path 31a and a lower sealing portion 32a that constitute the bottom surface of the pump chamber 25 along the peripheral edge thereof. An annular end surface portion 67 adjacent to the inside of the pump chamber 25 in the outer annular projecting surface 66 is opposed to the disk portion 40 of the rotor 23 disposed in the partition chamber 20 with a minute gap G1 (see FIG. 2). reference). In the annular end surface portion 67, two grooves 67a having a constant width that allow the annular recess 64 and the lower fluid flow path 31a to communicate with each other are formed at positions 180 ° apart.

  An annular stepped portion 68 is provided on the inner peripheral surface of the upper portion of the circular recess 63, that is, the upper portion of the side wall portion 62. The annular step portion 68 includes an annular end surface 68a extending radially from the midway position in the axis L direction of the inner peripheral surface of the side wall portion 62, and a circular inner peripheral surface 68b extending upward from the outer peripheral edge of the annular end surface 68a. The annular step 68 is formed with a circular recess having a larger diameter than the circular recess 63 at the upper end portion of the upper case 12.

  From the front surface 62c of the side wall 62, the suction pipe 3 and the discharge pipe 4 protrude in parallel. An inclined surface 2k and a hook 8 are provided at a front left corner 62g of the lower case 11 adjacent to the discharge pipe 4 of the side wall 62. The hook 8 is formed along the inclined surface 2k, and is formed inside the rectangular contour R of the side wall portion 62 indicated by a dotted line. In other words, the hook 8 is located on the inside of the contour of the output angle formed by extending the front surface 2c and the side surface 2d of the pump case 2 so as to intersect each other. The hook 8 is opposed to the inclined surface 2k with a gap through which the lead wire 5 can pass. An anti-rotation recess 69 that constitutes the anti-rotation mechanism 13 is provided at the right rear corner 62 j of the side wall 62. The anti-rotation recess 69 is a recess recessed downward from the upper end surface 62a. Further, the rotation preventing recess 69 is cut out from the outer peripheral side, and the inner peripheral surface thereof is exposed to the outside of the lower case 11.

  A lower case fixing portion 14 a constituting the case fixing portion 14 protrudes forward from between the suction pipe 3 and the discharge pipe 4 on the front surface 62 c of the side wall portion 62. The lower case fixing portion 14a is provided with a first through hole 70 (1) that penetrates in the axis L direction. Further, the second left through hole 70 (2) penetrating in the direction of the axis L is formed in the rear left corner portion (second fixing portion) 62 i and the rear right corner portion (third fixing portion) 62 j of the side wall portion 62. ) And a third through hole 70 (3) penetrating in the direction of the axis L is provided. The second through hole 70 (2) is formed in front of the attachment hole 9 in the rear left corner portion 62i, and the third through hole 70 (3) rotates in the rear right corner portion 62j. It is formed in front of the stopping recess 69. In the rear left corner portion 62i and the rear right corner portion 62j of the side wall portion 62, the lower surface portion (the bottom plate portion 61 of the bottom plate portion 61) in which the second through hole 70 (2) and the third through hole 70 (3) are formed. The lower surface portion is formed with a recess 74 into which the head of the headed screw is inserted when the lower case 11 and the upper case 12 are fixed with the headed screw. In the front right corner portion 62h and the rear left corner portion 62i of the side wall portion 62, the cascade pump device is externally attached to the lower surface portion (the lower surface portion of the bottom plate portion 61) in which the attachment hole 9 is formed by a headed screw. A recess 75 into which the head of the headed screw is inserted when being fixed to the device is formed.

(Upper case)
FIG. 6A is a perspective view of the upper case 12 viewed from above, and FIG. 6B is a perspective view of the upper case 12 viewed from below. As shown in FIG. 6A, the upper case 12 includes a central projecting portion 80, a cylindrical portion 89 configured coaxially with the central projecting portion 80, an open end of the central projecting portion 80, and a lower end of the cylindrical portion 89. The inner annular part 90 which makes the part continuous is provided. Further, as shown in FIG. 6B, the upper case 12 includes an annular projecting portion 91 that is configured coaxially with the central projecting portion 80 and the cylindrical portion 89 on the outer peripheral side of the cylindrical portion 89 and projects downward. The outer annular portion 92 that is continuous between the upper end portion of the cylindrical portion 89 and the upper end portion of the annular projecting portion 91, and the projecting portion 93 that projects from the upper end portion of the annular projecting portion 91 to the outer peripheral side. The overhang part 93 includes a flat lower end surface 93a.

  The stator storage chamber 83 in which the stator 29 is disposed is configured by a surface on the opposite side of the lower case 11 from the central projecting portion 80, the cylindrical portion 89, and the inner annular portion 90. The central projecting portion 80 includes a projecting portion 80 a projecting upward from the opening of the stator storage chamber 83 on the bottom 81 side. The thickness of the cylindrical portion 89 in the radial direction is smaller than the thickness of the central protrusion 80 in the radial direction. An outer peripheral wall 86 defining an upper space 87 in which the substrate 30 is disposed is formed on the upper surface of the overhanging portion 93.

  On the annular lower end surface 94 (annular tip surface) of the annular protrusion 91, an upper fluid flow path 31b and an upper blocking portion 32b that constitute the ceiling surface of the pump chamber 25 are formed at a midway position in the radial direction. An annular end surface portion 94a adjacent to the inside of the pump chamber 25 at the annular lower end surface 94 is opposed to the disk portion 40 of the rotor 23 disposed in the partition chamber 20 with a minute gap G2 (see FIG. 2). ).

  At the upper end portion of the circular outer peripheral surface 95 of the annular projecting portion 91, a radial projecting portion 96 projecting by a predetermined dimension radially outward is provided. The radial protrusion 96 extends from the midway position of the annular protrusion 91 in the direction of the axis L in the radial direction and extends upward from the outer peripheral edge of the annular end face 96a. A circular outer peripheral surface 96b facing outward in the radial direction is provided.

  The outline shape of the overhanging portion 93 is substantially rectangular, and the front left corner portion 93g is obliquely cut out to form the inclined surface 2k. As shown in FIG. 6A, the outer peripheral wall 86 protrudes upward from the outer peripheral edge of the projecting portion 93 except for the corner portion 93 g having the notch. In the front left corner portion 93g with a notch, the outer peripheral wall 86 is provided so as to be inclined inward in the apparatus width direction toward the front at a position set back from (into) the outer peripheral edge of the overhanging portion 93. Yes. Further, in the left corner portion 93g on the front side, the outer peripheral wall 86 is cut into a rectangle with a constant width, and this cut-out portion serves as the wiring outlet 33. A portion between the wiring outlet 33 and the outer peripheral edge of the overhang portion 93 serves as a wiring placement portion 34. The upper surface of the wiring mounting portion 34 is provided in parallel with a number of wiring holding grooves 36 a having an arcuate cross section extending outward in the radial direction corresponding to the number of lead wires 5. An arc groove 37 extending on the extension of the wiring holding groove 36 a is provided inside the wiring outlet 33.

  Here, as shown in FIG. 3, the fixing member 35 constituting the wiring take-out portion 6 together with the wiring placement portion 34 has a planar shape wider than the opening width of the wire take-out port 33, and the device width A pair of fitting grooves 38 are provided on one edge and the other edge in the direction. The fitting grooves 38 are arranged in the same straight line and open toward the opposite side. Further, a wiring holding groove 36b having an arc-shaped cross section is provided on the lower surface of the fixing member 35 at a position facing the arc groove of the wiring mounting portion 34. With the fixing member 35 fixed to the upper case 12, A circular gap formed by the wiring holding groove 36 a on the upper surface of the wiring mounting portion 34 and the wiring holding groove 36 b on the lower surface of the fixing member 35 is visually observed when the pump case 2 is viewed from the protruding direction of the suction pipe 3 and the discharge pipe 4. (See FIG. 1 (c)).

  When the lead wire 5 is taken out from the pump case 2, the lead wire 5 is arranged on the wiring mounting portion 34, and the sleeve wall portion of the wiring outlet 33 of the outer peripheral wall 86 (notched with a constant width). The fixing member 35 is fixed to the upper case 12 from above the upper case 12 so that the end portion of the opening of the outer peripheral wall 86 is inserted into the pair of fitting grooves 38. As a result, the constricted portion 39 between the pair of fitting grooves 38 is press-fitted into the wiring outlet 33, and the lead wire 5 is connected to the wiring holding groove 36 a of the wiring mounting portion 34 and the wiring holding groove 36 b of the fixing member 35. It is inserted and sandwiched between them, and fixed with the covering pressed.

  Further, the fixing member 35 is in a state in which the outer peripheral edge portion of the substrate 30 is overlapped from above at the edge portion on the inner peripheral side thereof, and the falling of the substrate 30 is suppressed (prevented). In this case, the edge portion on the inner peripheral side of the fixing member 35 and the substrate 30 are arranged close to each other or in contact with each other.

  Here, when the lead wire 5 is inserted and sandwiched between the wiring holding groove 36a of the wiring mounting portion 34 and the wiring holding groove 36b of the fixing member 35, the lead-out direction (wiring lead-out direction) D1 of the lead wire 5 is changed. It is prescribed. That is, the wiring take-out guide portion 6a that defines the lead-out direction D1 of the lead wire 5 is configured by the wiring holding groove 36a of the wiring placement portion 34 and the wiring holding groove 36b of the fixing member 35 (see FIG. 1C). . The lead-out direction D1 of the lead wire 5 by the wiring take-out guide portion 6a is an angle of less than 90 ° around the axis L with respect to the protruding direction of the suction pipe 3 and the discharge pipe 4, and in this example, it is about 45 °. It has become. When the lead wire 5 is inserted and sandwiched between the wiring holding groove 36 a of the wiring mounting portion 34 and the wiring holding groove 36 b of the fixing member 35, the lead wire 5 taken out from the wiring extraction portion 6 to the outside of the pump case 2. 1 extends in an angle direction of less than 90 ° with respect to the protruding direction of the suction pipe 3 and the discharge pipe 4, so that the lead wire 5 can be easily routed forward of the cascade pump device 1. If the lead-out direction D1 of the lead wire 5 is an angle of less than 90 ° with respect to the protruding direction of the suction pipe 3 and the discharge pipe 4, the lead-out direction D1 of the lead wire 5 is the protruding direction of the suction pipe 3 and the discharge pipe 4. Compared to the case where the angle is 90 °, the space for drawing the lead wire 5 forward of the cascade pump device 1 can be reduced in the device width direction of the cascade pump device 1.

  Next, from the rear right corner portion 93j of the overhang portion 93, as shown in FIG. 6 (b), a cylindrical anti-rotation projection 97 that constitutes the anti-rotation mechanism 13 together with the anti-rotation recess 69 is downward. Protruding. The outer peripheral edge of the tip end surface 97a (lower end surface) of the rotation preventing projection 97 is rounded. Here, the position of the front end surface 97a of the rotation preventing projection 97 is the same position as the annular lower end surface 94 of the annular protrusion 91 in the axis L direction. Further, the protrusion dimension of the rotation prevention protrusion 97 is set to be shorter than the depth dimension of the rotation prevention recess 69. Further, the rotation preventing projection 97 has a gap between the rotation preventing projection 97 and the inner peripheral surface of the rotation preventing recess 69 in the circumferential direction around the axis L when the rotation preventing projection 97 is inserted into the rotation preventing recess 69. In the radial direction centered on the axis L, a gap is formed between the inner peripheral surface of the anti-rotation recess 69.

  An upper case fixing portion 14b constituting the case fixing portion 14 protrudes forward in the center of the front surface (front side) of the overhang portion 93 in the apparatus width direction. The upper case fixing portion 14b is provided with a screw hole 98 (1) that is recessed in the axis L direction. Further, the rear left corner portion 93i (second fixing portion) and the rear right corner portion 93j (third fixing portion) are respectively provided with a second screw hole 98 (2) recessed in the direction of the axis L and the axis line. A third screw hole 98 (3) that is recessed in the L direction is provided. The second screw hole 98 (2) is formed in front of the attachment hole 9 in the rear left corner portion 93i, and the third screw hole 98 (3) is rotated in the rear right corner portion 93j. It is formed in front of the stop projection 97.

(Pump chamber compartment formation)
FIG. 7 is a partial cross-sectional view of the cascade pump device 1 taken along the line ZZ in FIG. 1A, and shows a state in which the annular protrusion 91 of the upper case 12 is inserted inside the annular step portion 68 of the lower case 11. Indicates the state. When the pump chamber 25 (compartment chamber 20) is partitioned, the O-ring 26 is mounted on the circular outer peripheral surface 95 of the annular protrusion 91 of the upper case 12. At this time, a lubricant is applied to the O-ring 26. The support shaft 24 is fixed in advance to the support shaft fixing recess 82 of the upper case 12. The rotor 23 is disposed in the circular recess 63 of the lower case 11 so that the support shaft 24 can be inserted into the bearing portion 41.

  Next, the annular protrusion 91 of the upper case 12 is inserted inside the annular step portion 68 of the lower case 11. Here, since the tip end surface 97a of the anti-rotation projection 97 of the anti-rotation mechanism 13 is in the same position as the annular lower end surface 94 of the annular protrusion 91 in the axis L direction, the annular protrusion 91 is located inside the annular step 68. Simultaneously with the insertion, the rotation prevention protrusion 97 is inserted into the rotation prevention recess 69 provided in the lower case 11.

  Thereafter, the upper case 12 and the lower case 11 are brought relatively close to each other, and the annular lower end surface 94 of the annular projecting portion 91 (the annular end surface portion located on the outer peripheral side of the upper fluid flow path 31b and the upper blocking portion 32b) Then, the annular end surface 68a of the annular step portion 68 of the lower case 11 is brought into contact. At this time, the circular outer peripheral surface 96 b of the radially projecting portion 96 of the upper case 12 is in contact with the circular inner peripheral surface 68 b of the annular step portion 68 of the lower case 11, and the upper case 12 is in contact with the lower case 11. Position in the radial direction. The O-ring 26 is formed between the circular outer peripheral surface 95 of the annular protrusion 91 of the upper case 12 and the circular inner periphery of the lower case 11 between the annular end surface 96 a of the radial protrusion 96 and the annular end surface 68 a of the annular step 68. The surface 68b is crushed in the radial direction, and a state in which fluid leakage from the compartment 20 is prevented is formed.

  When the upper case 12 is laminated on the lower case 11 and the pump chamber 25 (compartment chamber 20) is partitioned, the support shaft 24 penetrating the bearing portion 41 of the rotor 23 has a lower end at the support shaft of the lower case 11. The support shaft 24 and the central projection 80 are coaxially inserted into the fixing recess 60 and fixed. Therefore, the stator 29 and the rotor 23 are arranged coaxially, the salient pole 51 around which the drive coil 27 is wound in the stator core 28, and the drive magnet 22 of the rotor 23 arranged in the compartment 20 are the cylinder of the upper case 12. Confront through part 89. In this example, as shown in FIG. 2, two washers 43 are inserted between the upper end surface of the bearing portion 41 of the rotor 23 and the bottom portion 81 of the protruding portion, so that the magnetic force in the direction of the axis L of the stator core 28 is obtained. The magnetic center position in the direction of the axis L of the drive magnet 22 mounted on the rotor 23 is shifted downward with respect to the center position, and the rotor 23 is biased upward by the magnetic attractive force acting between the stator core 28 and the drive magnet 22. It is in a state of being.

  Thereafter, the first to third screw holes 98 (1) to (3) provided in the upper case 12 through the first to third through holes 70 (1) to (3) provided in the lower case 11. The upper case 12 and the lower case 11 are fixed by three headed screws that are screwed together.

  In the state where the pump chamber 25 is partitioned, as shown in FIG. 1B, the tip end surface 97a of the anti-rotation projection 97 inserted into the anti-rotation recess 69 and the bottom surface 69a of the anti-rotation recess 69 A gap G3 is formed between the two. Accordingly, a flathead screwdriver or the like is inserted from the outside of the pump case 2 into the gap G3 between the tip end of the anti-rotation protrusion 97 inserted into the anti-rotation recess 69 and the bottom surface of the anti-rotation recess 69. The pump case 2 can be disassembled into the upper case 12 and the lower case 11 by applying a force in a direction that separates the tip of the rotation prevention protrusion 97 and the bottom surface of the rotation prevention recess 69.

(Lead wire routing)
Next, with reference to FIG. 8, a routing method for routing the lead wire 5 taken out from the wiring take-out portion 6 to the outside of the pump case 2 will be described. FIG. 8 is an explanatory view showing an example of routing of the lead wire 5 taken out from the wiring take-out portion 6. FIG. 8A shows an example in which the lead wire 5 is pulled out in front of the pump case 2, FIG. 8B shows an example in which the lead wire 5 is routed along the inclined surface 2k, and FIG. In this example, the lead wire 5 is bent in the direction away from the pump case 2 using the hook 8.

  In the example shown in FIG. 8A, the lead wire 5 taken out from the wiring lead-out portion 6 is drawn forward (in the protruding direction of the suction pipe 3 and the discharge pipe 4). In this example, the wire take-out portion 6 is provided at the front left corner 2g of the pump case 2, and the wire take-out portion 6 faces radially outward toward the diagonally front, and the lead wire 5 by the wire take-out guide portion 6a. The drawing direction D1 is about 45 ° around the axis L with respect to the protruding direction of the suction pipe 3 and the discharge pipe 4. Therefore, when the lead wire 5 taken out from the wiring take-out portion 6 is routed forward, the pump case 2 is within the range of the width of the pump case 2 (when viewed from the axial direction parallel to the suction pipe 3 and the discharge pipe 4). Between a pair of circumscribed virtual lines L1). Further, the hose 100 connected to each of the suction pipe 3 and the discharge pipe 4 can also be arranged in the range of the width of the pump case 2 in front of the pump case 2.

  In other words, the wiring take-out part 6 is formed by extending the front surface 2c and the side surface 2d constituting a part of the contour of the pump case 2 when viewed from the direction of the axis L and intersecting each other. It is located inside the outline of FIG. 5A (rectangular outline R), and is drawn out from the wiring extraction part 6 by the wiring extraction guide part 6a constituted by the wiring holding groove 36a and the wiring holding groove 36b. A lead-out direction D1 of the lead wire 5 is defined forward. Therefore, the lead wire 5 can be routed forward within the range of the pump case 2 in the apparatus width direction.

  Here, among the front surface 2c, the front left side surface 2d, the front right side surface 2e and the rear side surface 2f of the pump case 2, three side surfaces 2d excluding the front surface 2c provided with the suction pipe 3 and the discharge pipe 4 are provided. 2e and 2f are constituted by flat surfaces. Accordingly, when the plurality of cascade pump devices 1 are arranged adjacent to each other in the device width direction of the cascade pump device 1 or in the rear direction of the cascade pump device 1 in a plane orthogonal to the axis L, the cascade pump device 1 and others are arranged. A gap is not formed between the cascade pump devices 1 and the plurality of cascade pump devices 1 can be arranged in a small area.

  In the example shown in FIG. 8B, the lead wire 5 taken out from the wiring take-out portion 6 is bent downward along the inclined surface 2k from the wiring placement portion. And it is made to pass through between the hook 8 and the inclined surface 2k, is locked to the hook 8, and does not float from the inclined surface 2k. Here, the inclined surface 2k is provided by obliquely cutting the front left corner 2g of the pump case 2, and the hook 8 has four side surfaces when the pump case 2 is viewed from the direction of the axis L. Since it is located inside the rectangular contour constituted by 2c to 2f, the lead wire 5 routed downward along the inclined surface 2k can be routed inside the rectangular contour.

  In the example shown in FIG. 8C, the lead wire 5 routed downward in FIG. 8B is moved away from the pump case 2 from the portion in contact with the hook 8 using the hook 8. It is bent. Here, the hook 8 extends in a direction perpendicular to the axis L along the inclined surface 2k with a constant width at the center position in the axis L direction of the inclined surface 2k. Therefore, when the lead wire 5 is bent in the direction away from the pump case 2, it protrudes from the range of the height of the pump case 2, that is, between the pair of upper surfaces 2a and 2b of the pump case 2 facing each other in the axis L direction. It can be bent and routed at no position.

(Function and effect)
According to this example, the suction pipe 3 and the discharge pipe 4 extending in parallel with each other and the wiring take-out portion 6 are provided in an intermediate portion 2z between the upper surface 2a and the lower surface 2b of the pump case 2 having a quadrangular prism shape. The lead-out direction D1 of the lead wire 5 drawn out from the wiring lead-out portion 6 is defined to be less than 90 ° with the protruding direction of the suction pipe 3 and the discharge pipe 4. Thus, when the pump case 2 is viewed from the protruding direction of the suction pipe 3 and the discharge pipe 4, all of the suction pipe 3, the discharge pipe 4 and the wiring extraction portion 6 are disposed at a position where they can be seen. Therefore, when the cascade pump device 1 is mounted on an external device, the pump case 2 is pulled out from the pump case 2 and a space for routing pipes such as hoses connected to the suction pipe 3 and the discharge pipe 4 in front (one side) of the pump case 2. It is sufficient to provide a space for routing the lead wire 5. That is, since it is not necessary to provide a space for routing the lead wire 5 behind the pump case 2 (the other side), the mounting space can be reduced accordingly. In addition, since the wire extraction portion 6 is provided in the intermediate portion 2z between the upper surface 2a and the lower surface 2b located at both ends of the pump case 2 in the axis L direction, the lead wire 5 is connected to the pump case 2 in the axis L direction. It can be taken out within the range. Therefore, it is not necessary to provide a space for drawing the lead wire 5 at a position adjacent to the pump case 2 in the direction of the axis L, so that the mounting space can be reduced accordingly.

  Furthermore, since the pump case 2 has a quadrangular prism shape, when the cascade pump device 1 is mounted, there is little generation of useless space with external equipment. Therefore, for example, when a plurality of cascade pump devices 1 are arranged in parallel in the device width direction, the side surface (second side surface) 2d of one adjacent cascade pump device 1 and the side surface (first surface) of the other cascade pump device 1 (3 side surfaces) 2e can be placed in contact with or close to each other. In the case where a plurality of cascade pump devices 1 are arranged in the vertical direction, the upper surface 2a of one adjacent cascade pump device 1 and the lower surface 2b of the other cascade pump device are arranged in contact with or close to each other. can do.

  Further, in this example, the suction pipe 3, the discharge pipe 4, and the wiring extraction part 6 are arranged around the axis L of the intermediate part 2 z in which the pump chamber 25 is configured. In order. As a result, the angle around the axis L from the suction pipe 3 to the discharge pipe 4 (angle range of the lower fluid flow path 31a and the upper fluid flow path 31b) can be increased, so that the pressure for pumping the liquid is improved. Therefore, even if the wiring extraction portion 6 for routing the lead wire 5 toward the protruding direction of the suction pipe 3 and the discharge pipe 4 is provided, the increase in size of the pump case 2 can be suppressed. In the cascade pump device 1 of this example, the suction pipe 3 and the discharge pipe 4 can be interchanged by changing the rotation direction of the rotor 23. That is, the fluid can be sucked from the discharge pipe 4 side and can be discharged from the suction pipe 3 side. In this case, the suction pipe 3, the discharge pipe 4, and the wiring extraction part 6 are arranged in the order of the discharge pipe 4, the suction pipe 3, and the wiring extraction part 6 around the axis L.

  Here, the cascade pump device 1 of the present example can be fixed to the external device 200 using a fixing member having an L-shaped cross section. FIG. 9 is an explanatory diagram for attaching the cascade pump device 1 to an external device using a fixing member. As shown in FIG. 9, the fixing member 101 includes a rectangular mounting plate portion 101a fixed to the lower surface 2b of the pump case 2 using the mounting holes 9 of the cascade pump device 1, and an edge of the mounting plate portion 101a. A rectangular fixed plate portion 101b that is bent in an orthogonal direction and fixed to the external device 200 is provided.

  When the cascade pump device 1 is attached to the external device 200 using such a fixing member 101, for example, as shown in FIG. 9A, the side surface 2e is on the lower side, and the side surface 2e is external. The cascade pump device 1 can be attached so as to be in contact with the device 200. In this case, according to the cascade pump device 1 of this example, the lead wire 5 can be routed so as not to protrude upward (outside) from the second side surface 2d. That is, when the cascade pump device 1 is placed vertically and the projected area of the pump case 2 as viewed from above is reduced, the height of the cascade pump device 1 including the lead wire 5 can be kept low. Note that the cascade pump device 1 can also be attached so that the side surface 2d of the pump case 2 faces down and the side surface 2d contacts the external device 200. Also in this case, according to the cascade pump device 1 of this example, the lead wire 5 can be pulled out without causing interference with the external device 200.

  Further, when the cascade pump device 1 is attached to the external device 200 using the fixing member 101, as shown in FIG. 9B, the side surface 2f of the pump case 2 is on the lower side, and the side surface 2f is external. It can also be attached so as to contact the device 200. That is, according to the cascade pump device 1 of the present example, since the wiring extraction portion 6 is provided on the side from which the suction pipe 3 and the discharge pipe 4 protrude, the front surface 2c from which the suction pipe 3 and the discharge pipe 4 protrude The lead wire 5 does not protrude to the side surface 2f facing the side surface 2f, and the side surface 2f can be brought into close contact with the external device 200. Thus, in the cascade pump device 1 of this example, even when any of the upper surface 2a, the lower surface 2b, and the side surfaces 2d to 2f of the pump case 2 is a contact surface (opposing surface) with the external device 200, the pump case Since 2 can be brought into close contact with the external device 200, the degree of freedom of arrangement of the cascade pump device 1 is high.

  Furthermore, according to the present example, the hook 8 that locks the lead wire 5 is located inside the rectangular contour constituted by the four side surfaces 2c to 2f when the pump case 2 is viewed from the direction of the axis L. Therefore, it is possible to prevent the hook 8 from interfering with the external device 200 when the pump case 2 is mounted. Moreover, if the lead wire 5 is pulled out along the inclined surface 2k, the lead wire 5 is positioned inside the rectangular contour constituted by the four side surfaces 2c to 2f when the pump case 2 is viewed from the axis L direction. be able to. Further, when the lead wire 5 is bent in the direction away from the pump case 2, if the hook 8 is used, the lead wire 5 can be bent and routed at a position that does not protrude from the height range of the pump case 2. .

  Also, in this example, mounting holes 9 for mounting the pump case 2 to the external device 200 are formed in the front right corner portion 2h and the rear left corner portion 2i of the quadrangular prism-shaped pump case 2. Yes. Since each mounting hole 9 is provided using a corner portion that becomes a dead space between the annular pump chamber 25 in the quadrangular prism-shaped pump case 2, even if the mounting hole 9 is provided, the pump Case 2 does not increase in size. Further, in this example, the wiring extraction portion 6 is provided in the corner portion 2g adjacent to one side of the front surface 2c in the apparatus width direction, the attachment hole 9 is provided in the corner portion 2h adjacent to the other side of the front surface 2c, and the corner portion 2h. Since the mounting hole 9 is provided in the corner portion 2i located diagonally with respect to the pump case 2 when the pump case 2 is mounted to an external device or the fixing member 101 using the two mounting holes 9, It is easy to make this force uniform, and it is possible to prevent a mounting failure in which the cascade pump device 1 is lifted from an external device.

  Further, a case fixing portion 14 for fixing the lower case 11 and the upper case 12 using screws protrudes from the front surface 2 c between the suction pipe 3 and the discharge pipe 4. Since the space between the suction pipe 3 and the discharge pipe 4 becomes a dead space when the cascade pump device 1 is attached to the external device 200, the cascade pump can be provided by protruding the case fixing portion 14 at such a position. When mounting the apparatus 1, the case fixing unit 14 does not interfere with the external device 200. In addition, the second through hole 70 (2) and the second screw hole 98 (2) constituting the second fixing portion for fixing the lower case 11 and the upper case 12 with screws, The third through hole 70 (3) and the third screw hole 98 (3) constituting the three fixing portions are formed in the rear left corner portion 2i and the rear right corner portion 2j. That is, the second through hole 70 (2) and the second screw hole 98 (2), and the third through hole 70 (3) and the third screw hole 98 (3) are respectively formed in the quadrangular prism-shaped pump case 2. Since it is provided using a corner portion that becomes a dead space with the annular pump chamber 25, the pump case 2 may be enlarged even when such second and third fixing portions are provided. Absent.

  Further, in this example, when the lower case 11 and the upper case 12 are laminated to form the pump chamber 25, the rotation preventing mechanism 13 that prevents the lower case 11 and the upper case 12 from rotating relative to each other around the axis L is provided. The anti-rotation mechanism 13 is provided by using a corner portion 2j that becomes a dead space between the annular pump chamber 25 in the quadrangular prism-shaped pump case 2. Therefore, even when the stop mechanism 13 is provided, the pump case 2 does not increase in size.

  In addition, according to this example, since the suction pipe 3 and the discharge pipe 4 extend in parallel with each other, when the lower case 11 is molded, it can be molded using the same slide mold.

(Other embodiments)
In the above example, the pump case 2 has a quadrangular prism shape. However, the pump case may have a cylindrical shape or a polygonal prism shape such as a triangular prism shape, a pentagonal prism shape, or a hexagonal prism shape. Even when such a shape is adopted, the suction pipe and the discharge pipe that extend in the same direction parallel to each other and the wiring extraction portion are provided between the two end faces located at both ends in the axial direction of the pump case. If the angle formed by the drawing direction D1 of the wiring take-out guide portion and the protruding direction of the suction pipe and the discharge pipe is less than 90 °, the suction pipe and the discharge pipe are mounted when the cascade pump device is mounted on an external device. A space for routing piping such as a hose connected to the suction pipe and the discharge pipe and a space for routing the lead wire drawn from the pump case can be provided on one side of the pump case from which the pipe protrudes. Further, the lead wire can be taken out within the range of the height of the pump case in the axial direction. Therefore, the mounting space for the cascade pump device can be suppressed.

  In addition, the pump case includes a first side surface and a second side surface that constitute a part of the contour of the pump case 2 when the intermediate portion is arranged next to the axis L and viewed from the direction of the axis L, and the first case. As long as the exit angle formed between the side surface and the second side surface is provided, the shape may not be a polygonal column. Even in such a shape, as in the above example, two suction pipes and discharge pipes extending in the same direction parallel to each other, and the wiring outlets are located at both ends in the axial direction of the pump case. Provided between the end faces, if the angle between the drawing direction D1 of the wiring take-out guide part and the protruding direction of the suction pipe and the discharge pipe is less than 90 °, the cascade pump device is mounted on an external device. In addition, a space for drawing piping such as a hose connected to the suction pipe and the discharge pipe and a space for drawing the lead wire drawn from the pump case can be provided on one side of the pump case from which the suction pipe and the discharge pipe protrude. Further, the lead wire can be taken out within the range of the height of the pump case in the axial direction. Therefore, the mounting space for the cascade pump device can be suppressed. Further, if a suction pipe and a discharge pipe projecting in parallel to the first side surface are provided, and a wiring outlet is provided at the exit angle formed between the first side surface and the second side surface, the cascade pump device 1 is connected to an external device. When mounted on the pump case, a space for drawing piping such as a hose connected to the suction pipe and the discharge pipe and a space for drawing the lead wire drawn from the pump case can be provided on one side of the pump case. Further, the lead wire can be taken out within the range of the height of the pump case in the axial direction. Therefore, the mounting space for the cascade pump device can be suppressed. In addition, since the wiring extraction portion can be disposed in the dead space between the annular pump chamber and the exit angle, the pump case can be prevented from being enlarged.

  In the above example, the hook 8 is used as the wiring direction restricting portion. For example, by providing the inclined surface 2k with a convex portion having a through hole through which the lead wire 5 can be passed, You can also

  Further, in the above example, the wiring takeout guide portion 6a is constituted by the wiring holding groove 36a of the wiring placement portion 34 and the wiring holding groove 36b of the fixing member 35. However, the wiring takeout guide portion 6a is replaced with the wiring placement portion. It is also possible to configure only 34 wiring holding grooves 36a. In this case, it is possible to adopt a configuration in which the lead wire 5 is placed in the wiring holding groove 36a and the lead wire 5 is pressed and fixed from above by a fixing member not provided with the wiring holding groove 36b. Alternatively, after the lead wire 5 is placed in the wiring holding groove 36a, the lead wire 5 may be temporarily fixed using a fixing jig, and the lead wire 5 may be fixed to the wiring holding groove 36a with an adhesive or a potting agent 16. .

  In the above example, the wiring take-out guide portion 6a is composed of a pair of grooves (wiring holding groove 36a and wiring holding groove 36b) arranged to face each other, but the lead wire 5 is connected to the upper case 12 or the fixing member 35. A configuration that defines the lead-out direction D <b> 1 of the lead wire 5 by providing a hole that passes individually or a hole that allows the entire lead wire 5 to pass therethrough may be adopted. Alternatively, a configuration may be adopted in which a plurality of ribs are formed in the wiring placement portion 34, and the lead wire 5 is disposed between the ribs to define the lead-out direction D1 of the lead wire 5.

  Further, in the above example, the wiring take-out portion 6 is provided at the corner portion 2g which is the exit angle between the front surface 2c and the side surface 2d of the pump case 2, but the exit between the front surface 2c and the side surface 2e. You may provide the wiring extraction part 6 in the corner | angular part 2h which is a corner | angular. Moreover, the wiring extraction part 6 may be provided in the corner | angular part 2g and the corner | angular part 2h, and the lead wire 5 may be taken out from these two places.

  In addition, the front surface 2c, the side surfaces 2d, 2e, and 2f may have a curved shape in which the central portion of the device width direction or height direction of all these side surfaces or a part of the side surfaces bulges outward. Further, the outer surface of the side wall portion 62 of the lower case 11 and the outer surface of the outer peripheral wall 86 of the upper case 12 can have a step in the axis L direction. Even in such a configuration, if the wiring lead-out portion 6 is arranged inside the contour of the pump case 2 when viewed from the direction of the axis L, the lead wire 5 taken out from the wiring lead-out portion 6 can be routed. In addition, the space for routing near the contour of the pump case 2 can be reduced. Therefore, when the cascade pump device 1 is mounted, interference between external devices and the lead wire 5 can be suppressed.

DESCRIPTION OF SYMBOLS 1 Cascade pump apparatus 2 Pump case 2a Upper surface (The end surface of the upper side of the axial direction of the pump case 2)
2b Lower surface (the lower end surface in the axial direction of the pump case 2)
2c Front (first side)
2d side surface (second side surface)
2e Side (third side)
2f Side (4th side)
2g corner part (inside the first exit angle)
2h corner part (inside the second outgoing angle)
2i Corner part (inside the third angle of departure)
2j Corner part (inside the 4th exit angle)
2k inclined surface 2z middle part (portion between upper surface 2a and lower surface 2b of pump case 2)
3 Suction Pipe 3a Suction Port 4 Discharge Pipe 4a Discharge Port 6 Wiring Extraction Section 6a Wiring Drawer Guide Section 7 Connector 8 Hook
DESCRIPTION OF SYMBOLS 9 Mounting hole 11 Lower case 12 Upper case 13 Anti-rotation mechanism 16 Potting agent 20 Compartment chamber 21 Impeller 22 Magnet 23 Rotor 24 Support shaft 25 Pump chamber 26 O-ring 27 Coil 28 Stator core 29 Stator 30 Substrate 31 Liquid flow path 31a Lower side Fluid flow path 31b Upper fluid flow path 33 Wiring outlet 34 Wiring placement part 35 Fixing member 38 Fitting groove 39 Necked part between a pair of fitting grooves 38 43 Washer 44 Yoke 45 Recessed part 46 Recessed part 47 Recessed part 48 Blade 51 Protrusion Pole 53 Concave 60 Concave fixing concave part 61 Bottom plate part 62 Side wall part 62a Flat upper end face 62c Side wall part 62 Front face of side wall part 62g Front left corner part 62h of lower case 11 Front right corner part 62i Rear left part Corner portion 62j rear right corner portion 63 circular recess 64 annular recess REFERENCE SIGNS LIST 5 Inner annular projecting surface 66 Outer annular projecting surface 67 Annular end surface portion 68 Annular stepped portion 68a Annular end surface 68b Circular inner peripheral surface 69 Non-rotating recess 69a Bottom surface of anti-rotating recess 69 70 First through hole 74 Depressed 75 Bottomed cylindrical central projecting portion 80a Projecting portion 81 Bottom portion of central projecting portion 80 Recess for fixing spindle at center of bottom portion 83 Stator storage chamber 84 Cylindrical portion of central projecting portion 80 of upper case 12 85 For fixing stator Projection 86 Frame-like outer peripheral wall 87 Upper space 89 Cylindrical portion configured coaxially with central projection portion 91 Annular projection portion 93a Flat lower end surface of overhang portion 93 93b Front left corner portion 93g Corner portion with cutout 93i Rear left corner 93j Rear right corner 94 Annular lower end surface 94a of annular protrusion 91a Annular end adjacent to the inside of pump chamber 25 Surface portion 95 Circular outer peripheral surface of annular projecting portion 91 96 Radial projecting portion 96a Circular end surface facing toward lower case 11 96b Circular outer peripheral surface extending upward from the outer peripheral edge of annular end surface 96a and facing outward in the radial direction 97 Anti-rotation projection 97a Tip end surface of anti-rotation projection 97 98 (2) Second screw hole 98 (3) Third screw hole 100 Hose 101 Fixing member 101a Rectangular mounting plate portion 101b Rectangular fixing plate portion 200 External Equipment L axis (center axis of pump chamber)
D1 Pull-out direction (wiring lead-out direction)
G1 Disk part 40 and minute gap G2 Disk part 40 and minute gap G3 Gap between tip surface 97a and bottom surface 69a of recess 69 for rotation prevention

Claims (13)

An annular pump chamber;
An annular impeller disposed coaxially in the pump chamber;
A magnetic drive mechanism for rotating the impeller by exciting a drive coil;
A pump case that houses the pump chamber, the impeller, and the magnetic drive mechanism;
The pump case includes two end faces located at both ends in the axial direction, and an intermediate portion between the two end faces,
The intermediate portion is provided with a suction pipe and a discharge pipe communicating with the pump chamber, and a wiring take-out portion for taking out a wiring for supplying an excitation current to the drive coil.
The suction pipe and the discharge pipe protrude in the same direction parallel to each other along a plane perpendicular to the axis,
The wiring extraction portion includes a wiring extraction guide portion that defines a direction in which the wiring is extracted to the outside.
The cascade pump device characterized in that an angle formed by the drawing direction and the protruding direction of the suction pipe and the discharge pipe is less than 90 ° around the axis. In claim 1,
The suction pipe, the discharge pipe, and the wiring take-out section are provided in the order of the suction pipe, the discharge pipe, and the wiring take-out section around the axis, or the discharge pipe, the suction pipe around the axis A cascade pump device comprising a tube and the wiring take-out portion in this order. In claim 1 or 2,
The intermediate portion includes an outer peripheral surface constituting an outline of the pump case when viewed from the axial direction,
The cascade pump device according to claim 1, wherein the wiring extraction portion is provided on an inner side than an outer peripheral surface constituting the outline. In claim 1 or 2,
The intermediate portion is arranged next to each other around the axis, and constitutes a part of the contour of the pump case when viewed from the axial direction, the first side and the first side A first angle formed between two side surfaces,
The magnetic drive mechanism is configured radially inside than the pump chamber,
The suction pipe and the discharge pipe protrude from the first side surface,
The cascade pump device according to claim 1, wherein the wiring take-out portion is provided inside the first lead angle. In claim 4,
The first exit angle is formed with an inclined surface extending in the axial direction intersecting the first side surface and the second side surface by cutting out a tip of the first output angle. Pump device. In claim 5,
The intermediate portion includes a wiring direction restricting portion that restricts the direction of the wiring drawn out along the inclined surface after being taken out of the pump case from the wiring taking-out portion,
2. The cascade pump device according to claim 1, wherein the wiring direction restricting portion is located inside an output angle contour formed by extending and intersecting the first side surface and the second side surface. In claim 6,
The said wiring direction control part is the cascade pump apparatus characterized by extending in the direction orthogonal to the said axis line along an inclined surface in the middle position of the axial direction of the said inclined surface. In claim 4,
The said pump case is a quadrangular prism shape, The cascade pump apparatus characterized by the above-mentioned. In claim 8,
The first outgoing angle is formed with an inclined surface that extends in the axial direction intersecting the first side surface and the second side surface by cutting out the tip of the outgoing angle.
The intermediate portion includes a wiring direction restricting portion that restricts the direction of the wiring drawn out along the inclined surface after being taken out of the pump case from the wiring taking-out portion,
The wiring direction restricting portion is a hook having a gap for locking the wiring between the inclined surface, and is configured to extend and intersect the first side surface and the second side surface. A cascade pump device, wherein the cascade pump device is located inside a corner outline. In claim 8,
In the pump case, an inner side of a second output angle between the third side surface adjacent to the first side surface on the side opposite to the second side surface around the axis, and the second output angle is diagonal. The cascade pump device is characterized in that an attachment hole for attaching the pump case to an external device is formed on the inner side of the third output angle located at the position. In claim 10,
The pump case includes a first case and a second case,
The pump chamber is partitioned by laminating the first case and the second case so as to partially overlap in a direction perpendicular to the axis,
The pump case is provided with a first fixing portion for fixing the first case and the second case using screws,
The cascade pump device according to claim 1, wherein the first fixing portion protrudes from the first side surface between the suction pipe and the discharge pipe. In claim 10 or 11,
The pump case is provided with a second fixing portion and a third fixing portion for fixing the first case and the second case with screws,
The second fixing portion is formed inside the third exit angle,
The cascade pump device according to claim 3, wherein the third fixing portion is formed inside a fourth output angle that is diagonally opposite to the first output angle. In claim 10,
The pump case includes a first case and a second case,
The pump chamber is partitioned by laminating the first case and the second case so as to partially overlap in a direction perpendicular to the axis,
Between the first case and the second case, an O-ring for preventing leakage of fluid from the pump chamber is disposed coaxially with the pump chamber,
In the pump case, the first case and the second case are stacked on the inner side of the fourth output angle that is diagonally opposite to the first output angle. A cascade pump device comprising a rotation prevention mechanism configured to prevent the case and the second case from rotating relative to each other about the axis.

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