[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2021095407A1 - Flow path switch valve - Google Patents

Flow path switch valve Download PDF

Info

Publication number
WO2021095407A1
WO2021095407A1 PCT/JP2020/038141 JP2020038141W WO2021095407A1 WO 2021095407 A1 WO2021095407 A1 WO 2021095407A1 JP 2020038141 W JP2020038141 W JP 2020038141W WO 2021095407 A1 WO2021095407 A1 WO 2021095407A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
lid
case
case body
flow path
Prior art date
Application number
PCT/JP2020/038141
Other languages
French (fr)
Japanese (ja)
Inventor
近藤　大介
望月　健一
Original Assignee
株式会社不二工機
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社不二工機 filed Critical 株式会社不二工機
Publication of WO2021095407A1 publication Critical patent/WO2021095407A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor

Definitions

  • the present invention relates to a flow path switching valve.
  • the present invention relates to a flow path switching valve to which a case body and a lid of a case accommodating a drive unit for driving a valve body are attached by snap fit.
  • Patent Document 1 An example of a conventional flow path switching valve is disclosed in Patent Document 1.
  • This flow path switching valve has a valve body having a valve chamber, a ball-shaped valve body arranged in the valve chamber, a valve shaft connected to the valve body, and a rotation that rotationally drives the valve body via the valve shaft. It has a drive unit and a case for accommodating the rotary drive unit.
  • the rotary drive unit has a motor and a drive gear.
  • the case of the flow path switching valve described above has a box-shaped case body having an open upper surface and a lid arranged so as to close the opening of the case body.
  • the lid is screwed to the case body.
  • a flow path switching valve adopts a plurality of snap fits having a claw portion and a claw receiving portion instead of screwing. By adopting the snap fit, the flow path switching valve can reduce the number of parts and can easily attach the case body and the lid.
  • the case body and lid are brought close to each other, and multiple snap fits (specifically, claws or claw receivers) are bent and hooked on each other to attach the case body and lid. ..
  • the force for bending each snap fit may vary.
  • the claw portion and the claw receiving portion are hooked at the same timing, but the hooking timing may be shifted due to the above variation. As a result, the case body and the lid may be misaligned and attached.
  • an object of the present invention is to provide a flow path switching valve that can effectively suppress the misalignment between the case body and the lid that are attached by snap fit.
  • the flow path switching valve includes a valve body, a valve body rotatably housed in the valve body, a valve shaft attached to the valve body, and the above.
  • a flow path switching valve having a drive unit that rotationally drives the valve body via a valve shaft and a case that is attached to the valve body and accommodates the drive unit.
  • the case is open on one side. It has a box-shaped case body, a lid arranged so as to close the opening, and a plurality of snap fits for attaching the case body and the lid, and the snap fit includes the case body and the case body.
  • the case body and the other of the lid have a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes. Is characterized in that the tip of the post is inserted into the positioning hole before the claw portion and the claw receiving portion of the snap fit are caught when the case body and the lid body are attached. And.
  • the flow path switching valve includes a valve body, a valve body rotatably housed in the valve body, and a valve shaft attached to the valve body.
  • a flow path switching valve having a drive unit that rotationally drives the valve body via the valve shaft and a case that is attached to the valve body and accommodates the drive unit. It has an open box-shaped case body, a lid arranged so as to close the opening, and a plurality of snap fits for attaching the case body and the lid body, and the snap fit is the case body.
  • a claw portion provided on one side of the lid body and a claw receiving portion provided on the other side and hooked on the claw portion, and the case body and the other side of the lid body are the case body and the case body. It has a plurality of positioning holes extending in the mounting direction with the lid, and the case body and the one of the lids have a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes. The post is formed so that the tip of the post is inserted into the positioning hole before the claw portion and the claw receiving portion of the snap fit are caught when the case body and the lid body are attached. It is characterized by.
  • the bottom wall portion of the case body is provided with a bearing portion that rotatably supports the valve shaft, and the end surface of the valve shaft on the case body side is fitted to be rotated together with the valve shaft.
  • a shaft portion is provided so as to project, and the case includes a rotation angle sensor having a rotor fitted with the fitting shaft portion, and a plate-shaped base body having a sensor support portion for supporting the rotation angle sensor. It is preferable that the rotation position detecting portion having the above is accommodated, and the lid body is provided with at least a recess into which the sensor supporting portion is fitted.
  • a case for accommodating a drive unit includes a box-shaped case body having an open side, a lid arranged so as to close the opening of the case body, and a plurality of cases to which the case body and the lid are attached.
  • the snap fit has a claw portion provided on one of the case body and the lid, and a claw receiving portion provided on the other side and hooked on the claw portion.
  • One (or the other) of the case body and the lid body has a plurality of positioning holes extending in the mounting direction between the case body and the lid body.
  • the other (or one) of the case body and the lid has a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes.
  • the post is formed so that the tip of the post is inserted into the positioning hole before the snap-fit claw portion and the claw receiving portion are caught when the case body and the lid are attached.
  • the post is inserted into the positioning hole when the case body and the lid are attached.
  • the positioning hole and the post guide the movement of the case body and the lid in the mounting direction and restrict the movement in the direction orthogonal to the mounting direction. This makes it possible to apply a force that flexes evenly to a plurality of snap fits. Then, the claw portions and the claw receiving portions of the plurality of snap fits can be hooked at the same timing. As a result, the misalignment between the case body and the lid can be effectively suppressed, and the case body and the lid can be appropriately attached.
  • the lid body is provided with at least a recess into which the sensor support portion is fitted, the sensor support portion is positioned with the case body via the lid body. Therefore, the rotation angle sensor supported by the sensor support portion can be appropriately arranged with respect to the valve shaft supported by the bearing portion of the case body.
  • FIG. 5 is a plan view showing a state in which the upper wall portion of the gear case is removed in the flow path switching valve of FIG. It is a top view which shows the state which the upper wall part of the gear case and the rotation position detection part were removed in the flow path switching valve of FIG. It is a figure explaining the rotation position detection part which the flow path switching valve of FIG. 1 has.
  • FIG. 1 is a perspective view of a flow path switching valve according to an embodiment of the present invention.
  • FIG. 2 is a left side view of the flow path switching valve of FIG.
  • FIG. 3 is a left side view showing a state in which the lid is lifted from the gear case main body of the flow path switching valve of FIG. 4 (a) and 4 (b) are a plan view and a bottom view of a lid body of the flow path switching valve of FIG.
  • FIG. 5 is a cross-sectional view (longitudinal cross-sectional view) of the flow path switching valve of FIG. 1 along the rotation axis of the ball valve body.
  • FIG. 6 is a plan view of the valve body of the flow path switching valve of FIG. In FIG.
  • FIG. 6 is a plan view showing a state in which the upper wall portion of the gear case is removed in the flow path switching valve of FIG. 1
  • FIG. 8 is a plan view showing a state in which the rotation position detecting portion is further removed.
  • FIG. 9 is a diagram illustrating a rotation position detection unit included in the flow path switching valve of FIG. 9 (a) and 9 (b) are a left side view and a plan view of the rotation position detection unit.
  • FIG. 9C is a plan view of the bus bar embedded in the potentiometer base of the rotation position detection unit.
  • the X-axis direction is the left-right direction
  • the Y-axis direction is the front-back direction (front-back direction)
  • the Z-axis direction is the up-down direction.
  • the X-axis, Y-axis, and Z-axis are orthogonal to each other.
  • the flow path switching valve 1 of this embodiment has a valve body 10, a ball valve body 20 as a valve body, seat members 30, 30, and a valve shaft 40. .. Further, the flow path switching valve 1 has a case 50, a drive unit 60, a ventilation unit 70, and a rotation position detection unit 80.
  • the valve body 10 is made of a synthetic resin such as polyphenylene sulfide (PPS), for example.
  • PPS polyphenylene sulfide
  • the valve body 10 is formed in a substantially cubic box shape with an open upper surface.
  • the valve body 10 has a bottom wall portion 15 and a square tubular peripheral wall portion 16.
  • the peripheral wall portion 16 has a left side wall portion 10a, a front wall portion 10b, a right side wall portion 10c, and a back wall portion 10d.
  • a substantially L-shaped first flow path 11 is provided on the left side wall portion 10a of the valve body 10.
  • the front wall portion 10b of the valve body 10 is provided with a linear second flow path 12 extending toward the front side.
  • the right side wall portion 10c of the valve body 10 is provided with a substantially L-shaped third flow path 13 that is plane-symmetrical with the first flow path 11.
  • the first flow path 11, the second flow path 12, and the third flow path 13 communicate with a valve chamber 14 provided in the valve body 10.
  • the valve chamber 14 accommodates the annular seat members 30 and 30 made of synthetic resin.
  • the seat members 30 and 30 are arranged so as to face each other with a gap in the left-right direction.
  • the ball valve body 20 is made of, for example, metal or synthetic resin.
  • the ball valve body 20 is formed in a hollow ball shape (spherical shape).
  • the ball valve body 20 is rotatably supported by the seat members 30 and 30.
  • the ball valve body 20 is housed in the valve chamber 14.
  • the ball valve body 20 is used as the valve body, but a columnar valve body may be used.
  • a valve shaft insertion hole 24 is provided in the upper part of the ball valve body 20.
  • the valve shaft 40 is inserted into the valve shaft insertion hole 24.
  • the valve shaft insertion hole 24 is formed so that the ball valve body 20 rotates around the axis L, which is the rotation axis, as the valve shaft 40 rotates.
  • the ball valve body 20 switches the connection between the first flow path 11, the second flow path 12, and the third flow path 13 by being rotated around the axis L.
  • the valve shaft insertion hole 24 is formed in a regular hexagonal shape.
  • the valve shaft 40 is made of synthetic resin.
  • the valve shaft 40 is formed in a column shape extending linearly as a whole.
  • the valve shaft 40 has a columnar portion 41 and a prismatic portion 42 coaxially connected to the lower end of the columnar portion 41.
  • the valve shaft 40 is arranged along the axis L.
  • a groove is provided at the lower end of the cylindrical portion 41 over the entire circumference.
  • An O-ring 44 formed in an annular shape is fitted in this groove.
  • the O-ring 44 is made of an elastic material such as a rubber material.
  • a large-diameter gear 67 of the drive unit 60 is coaxially attached to the upper end portion of the cylindrical portion 41.
  • a mounting hole 45 is provided in the center of the end surface 41a of the columnar portion 41 facing upward.
  • the mounting hole 45 is formed in a substantially columnar shape along the axis L.
  • the potentiometer shaft 81 of the rotation position detection unit 80 is press-fitted into the mounting hole 45.
  • the prismatic portion 42 is formed in a columnar shape.
  • the cross-sectional shape of the prism portion 42 (the shape of the cross section orthogonal to the axis L) is the same regular hexagonal shape as the valve shaft insertion hole 24.
  • the prism portion 42 is inserted into the valve shaft insertion hole 24 of the ball valve body 20.
  • the prism portion 42 is attached to the ball valve body 20 along the axis L. Since the cross-sectional shape of the prism portion 42 is the same as that of the valve shaft insertion hole 24, the valve shaft insertion hole 24 and the prism portion 42 fit into each other.
  • the ball valve body 20 is rotated around the axis L as the valve shaft 40 rotates.
  • Case 50 is made of a synthetic resin such as polyphenylene sulfide (PPS), for example.
  • PPS polyphenylene sulfide
  • the case 50 is attached to the valve body 10.
  • the case 50 accommodates the drive unit 60.
  • the case 50 includes a motor case 51 and a gear case 52.
  • the motor case 51 is formed in a bottomed cylindrical shape.
  • the motor case 51 accommodates the motor 61 of the drive unit 60.
  • the gear case 52 has a bottom wall portion 53, an upper wall portion 54, and a peripheral wall portion 55.
  • the bottom wall portion 53 is formed in a flat plate shape.
  • a motor case 51 is integrally provided on the bottom wall portion 53.
  • the upper wall portion 54 is arranged so as to face the bottom wall portion 53 in the vertical direction.
  • the upper wall portion 54 is provided with a ventilation portion 70.
  • the peripheral wall portion 55 connects the bottom wall portion 53 and the upper wall portion 54.
  • the bottom wall portion 53 and the peripheral wall portion 55 are integrally formed.
  • the bottom wall portion 53 and the peripheral wall portion 55 form a box-shaped gear case main body 52A having an open upper surface.
  • the upper wall portion 54 constitutes a lid 52B arranged so as to close the opening of the gear case main body 52A.
  • the gear case 52 accommodates the first worm 62 of the drive unit 60, the intermediate gear body 63, the large-diameter gear 67, and the rotation position detection unit 80.
  • the gear case 52 has a plurality of snap fits 90.
  • the plurality of snap fits 90 attach the gear case body 52A and the lid 52B to each other.
  • Each snap-fit 90 has a claw portion 91 and a claw receiving portion 92.
  • the claw portion 91 is provided on the peripheral wall portion 55 of the gear case main body 52A.
  • the claw receiving portion 92 is provided on the lid body 52B.
  • the claw receiving portion 92 has a U-shape.
  • the claw portion 91 has an inclined surface 91a that gradually goes outward as it goes downward, and a flat lower surface 91b that faces downward.
  • a U-shaped upper end portion 92a of the claw receiving portion 92 is continuously provided on the side surface of the lid body 52B.
  • the U-shaped lower end portion 92b of the claw receiving portion 92 is arranged so as to be hooked on the lower surface 91b of the claw portion 91.
  • the plurality of claw portions 91 included in the plurality of snap fits 90 are each formed to have the same shape, and the positions in the vertical direction (Z-axis direction) are the same.
  • the plurality of claw receiving portions 92 included in the plurality of snap fits 90 are also formed in the same shape, and are positioned in the same vertical direction.
  • the gear case body 52A may have the claw receiving portion 92, and the lid 52B may have the claw portion 91.
  • the shape of the claw portion 91 and the claw receiving portion 92 is arbitrary as long as it does not contradict the object of the present invention.
  • the gear case body 52A has a plurality of positioning holes 58.
  • the lid 52B has a plurality of posts 59.
  • the plurality of posts 59 are arranged corresponding to the plurality of positioning holes 58.
  • the plurality of positioning holes 58 and the plurality of posts 59 have the same diameter.
  • the plurality of positioning holes 58 and the plurality of posts 59 are formed so as to extend in the mounting direction (Z-axis direction) of the gear case main body 52A and the lid 52B, respectively.
  • the gear case body 52A and the lid 52B are arranged so as to face each other in the mounting direction, the distance from the lower surface 91b of the claw portion 91 to the lower end portion 92b of the claw receiving portion 92 (the place where the lower surface 91b is caught) is determined.
  • the distance from the positioning hole 58 to the post 59 is shorter.
  • the gear case main body 52A may have a plurality of posts 59
  • the lid 52B may have a plurality of positioning holes 58. That is, the positioning hole 58 and the post 59 may be provided in either the gear case main body 52A or the lid 52B.
  • the claw portion 91 and the claw receiving portion 92 of the snap fit 90 may be provided on either the gear case main body 52A or the lid 52B regardless of the positioning hole 58 and the post 59.
  • a recess 54b is provided on the lower surface 54a of the lid 52B.
  • the recess 54b has the same shape as the outer shape of the potentiometer base 82 included in the rotation position detection unit 80.
  • the recess 54b is provided so that the entire potentiometer base 82 fits when the gear case main body 52A and the lid body 52B are attached. As a result, the gear case main body 52A and the potentiometer base 82 are positioned via the lid body 52B.
  • the recess 54b may be provided so that at least the sensor support portion 84 of the potentiometer base 82 is fitted.
  • the gear case 52 has a cylindrical bearing portion 56.
  • the bearing portion 56 is integrally provided on the bottom wall portion 53.
  • a cylindrical portion 41 of the valve shaft 40 is inserted into the bearing portion 56.
  • the bearing portion 56 rotatably supports the cylindrical portion 41.
  • the valve shaft 40 is rotatably supported by the bearing portion 56.
  • the valve shaft 40 is arranged so as to straddle the valve body 10 and the gear case 52.
  • the gear case 52 has a square tubular inner peripheral wall portion 57.
  • the inner peripheral wall portion 57 is an annular wall portion provided so as to project downward from the bottom wall portion 53.
  • the inner peripheral wall portion 57 is inserted inside the valve main body 10 and is joined to the peripheral wall portion 16 of the valve main body 10 by ultrasonic welding or infrared welding.
  • the drive unit 60 rotationally drives the ball valve body 20 via the valve shaft 40.
  • the drive unit 60 includes a motor 61, a first worm 62, an intermediate gear body 63, and a large-diameter gear 67.
  • the first worm 62, the intermediate gear body 63, and the large diameter gear 67 constitute a speed reducer.
  • the motor 61 is arranged in the motor case 51.
  • the drive shaft 61a of the motor 61 protrudes into the gear case 52 from a through hole provided in the bottom wall portion 53 of the gear case 52.
  • a first worm 62 is attached to the tip of the drive shaft 61a.
  • the intermediate gear body 63 is arranged in the gear case 52.
  • the intermediate gear body 63 has a shaft portion 64, a small diameter gear 65 (first worm wheel), and a second worm 66.
  • the small diameter gear 65 is provided at one end 64a of the shaft portion 64.
  • the small diameter gear 65 meshes with the first worm 62.
  • the second worm 66 is provided at the other end 64b of the shaft 64.
  • the second worm 66 meshes with the large diameter gear 67 (second worm wheel).
  • the large diameter gear 67 is arranged in the gear case 52.
  • the large-diameter gear 67 is formed in a disk shape.
  • the cylindrical portion 41 of the valve shaft 40 is press-fitted into the through hole provided in the center of the large-diameter gear 67.
  • the large-diameter gear 67 is attached to the end of the valve shaft 40 on the gear case 52 side.
  • the large diameter gear 67 is a drive gear.
  • the drive unit 60 transmits the rotational force of the drive shaft 61a of the motor 61 to the valve shaft 40 via the first worm 62, the intermediate gear body 63, and the large diameter gear 67, and rotates the valve shaft 40 around the axis L. Let me. As a result, the ball valve body 20 is positioned at a desired rotation position.
  • the rotation position detection unit 80 has a potentiometer shaft 81 which is a rotation angle output shaft, a potentiometer base 82 which is a base body, and a potentiometer 85 which is a rotation angle sensor.
  • the potentiometer shaft 81 is made of, for example, a metal such as stainless steel or brass or a synthetic resin such as polyphenylene sulfide (PPS).
  • the potentiometer shaft 81 is separate from the valve shaft 40.
  • the potentiometer shaft 81 is press-fitted into the mounting hole 45 provided on the end surface 41a (end surface on the gear case body 52A side) of the valve shaft 40.
  • the potentiometer shaft 81 is coaxially fixed and attached to the valve shaft 40.
  • a D-cut shaped fitting shaft portion 81a is provided at the upper end portion of the potentiometer shaft 81.
  • the fitting shaft portion 81a of the potentiometer shaft 81 is arranged so as to project from the end surface 41a.
  • the fitting shaft portion 81a is fitted with the rotor 86 of the potentiometer 85.
  • the fitting shaft portion 81a may be integrally provided on the end surface 41a of the valve shaft 40.
  • the potentiometer base 82 integrally has a base main body portion 83 and a sensor support portion 84.
  • the base main body 83 is formed in a substantially flat plate shape.
  • the bottom wall portion 53 of the gear case 52 is provided with columnar bosses 53c and 53c protruding upward.
  • the base main body 83 is fixed to the bosses 53c and 53c by screws 95 and 95.
  • the sensor support portion 84 is formed in a substantially disk shape having a diameter smaller than that of the large diameter gear 67.
  • a potentiometer 85 is attached to the center of the sensor support portion 84.
  • the sensor support portion 84 is arranged in the gear case 52 so as to overlap the large diameter gear 67.
  • the potentiometer base 82 is composed of a synthetic resin integrated by insert molding and a metal bus bar 88.
  • the bus bar 88 has a first bus bar 88a, a second bus bar 88b, and a third bus bar 88c.
  • the first bus bar 88a and the second bus bar 88b are connected by the connecting portion 88d
  • the second bus bar 88b and the third bus bar 88c are connected by the connecting portion 88e.
  • the first bus bar 88a, the second bus bar 88b, and the third bus bar 88c can be handled as one component. Further, this makes it possible to easily perform the installation on the mold and the positioning on the mold in the insert molding.
  • the connecting portions 88d and 88e are exposed, and the connecting portions 88d and 88e are cut by punching with a punch tool or the like to form a through hole 89.
  • the first bus bar 88a, the second bus bar 88b, and the third bus bar 88c are electrically separated.
  • the terminals of the potentiometer 85 are connected to the first bus bar 88a, the second bus bar 88b, and the third bus bar 88c.
  • the potentiometer 85 is a rotation angle sensor for detecting the rotation angle (rotation angle).
  • the potentiometer 85 has a disc-shaped rotor 86 and a meter main body 87.
  • the meter body 87 rotatably supports the rotor 86.
  • the meter main body 87 is a signal output unit that outputs a signal (voltage) according to the rotation angle of the rotor 86.
  • a D-shaped fitting hole in a plan view is provided in the center of the rotor 86.
  • the fitting shaft portion 81a of the potentiometer shaft 81 is penetrated through the fitting hole.
  • the fitting shaft portion 81a and the fitting hole are fitted so that the rotor 86 is rotated together with the fitting shaft portion 81a.
  • the rotor 86 is rotated with the rotation of the fitting shaft portion 81a.
  • the potentiometer 85 detects the rotation angle of the potentiometer shaft 81 (that is, the valve shaft 40 and the ball valve body 20) around the axis L.
  • the rotational force of the drive shaft 61a of the motor 61 of the drive unit 60 is output to the valve shaft 40 via the large diameter gear 67 or the like, and the valve shaft 40 is rotated around the axis L.
  • the ball valve body 20 is rotated around the axis L with the rotation of the valve shaft 40, and the ball valve body 20 is positioned at each rotation position.
  • the connection of the flow path according to the rotation position of the ball valve body 20 is realized.
  • the potentiometer shaft 81 is rotated around the axis L together with the valve shaft 40.
  • a signal corresponding to the rotation angle of the potentiometer shaft 81 is output from the potentiometer 85.
  • the rotational position of the ball valve body 20 can be monitored based on the signal output from the potentiometer 85.
  • the gear case body 52A and the lid 52B are arranged so as to face each other in the mounting direction (Z-axis direction).
  • the lid 52B is gradually brought closer to the gear case body 52A, and the tips of the plurality of posts 59 of the lid 52B are inserted into the plurality of positioning holes 58 of the gear case body 52A corresponding to each post 59. Then, the lid body 52B is brought closer to the gear case main body 52A, and the post 59 is inserted into the positioning hole 58.
  • the lower end portions 92b of the claw receiving portions 92 of the plurality of snap fits 90 ride on the inclined surface 91a of the claw portions 91, and the claw receiving portions 92 bend outward.
  • each claw receiving portion 92 gets over the inclined surface 91a and is restored to the original shape, and the lower end portion 92b of each claw receiving portion 92 is hooked on the lower surface 91b of the claw portion 91 at the same timing.
  • the gear case main body 52A and the lid body 52B are attached.
  • the gear case 52 accommodating the drive unit 60 is arranged so as to close the openings of the box-shaped gear case main body 52A having one side open and the gear case main body 52A. It has a lid 52B, and a plurality of snap fits 90 for attaching the gear case main body 52A and the lid 52B.
  • the snap fit 90 has a claw portion 91 provided on the gear case main body 52A and a claw receiving portion 92 provided on the lid body 52B and hooked on the claw portion 91.
  • the gear case main body 52A has a plurality of positioning holes 58 extending in the mounting direction between the gear case main body 52A and the lid body 52B.
  • the lid 52B has a plurality of posts 59 extending in the mounting direction and inserted into the plurality of positioning holes 58. Then, when the gear case body 52A and the lid 52B are attached to the post 59, the tip of the post 59 is inserted into the positioning hole 58 before the claw portion 91 and the claw receiving portion 92 of the snap fit 90 are caught. Is formed in. Therefore, the post 59 is inserted into the positioning hole 58 when the gear case main body 52A and the lid body 52B are attached. The positioning hole 58 and the post 59 guide the movement of the gear case body 52A and the lid 52B in the mounting direction and restrict the movement in the direction orthogonal to the mounting direction.
  • the lid 52B is provided with a recess 54b into which the potentiometer base 82 is fitted.
  • the sensor support portion 84 of the potentiometer base 82 is positioned with the gear case main body 52A via the lid body 52B. Therefore, the potentiometer 85 supported by the sensor support portion 84 can be appropriately arranged with respect to the valve shaft 40 supported by the bearing portion 56 of the gear case main body 52A.
  • Flow path switching valve 10 ... Valve body, 10a ... Left side wall part, 10b ... Front wall part, 10c ... Right side wall part, 10d ... Back wall part, 11 ... First flow path, 12 ... Second flow path, 13 ... 3rd flow path, 14 ... valve chamber, 15 ... bottom wall part, 16 ... peripheral wall part, 20 ... ball valve body, 24 ... valve shaft insertion hole, 30 ... seat member, 40 ... valve shaft, 41 ... columnar part , 41a ... end face, 42 ... square column, 44 ... O ring, 45 ... mounting hole, 50 ... case, 51 ... motor case, 52 ... gear case, 52A ... gear case body, 52B ... lid, 53 ...
  • Base body, 84 Sensor support, 85 ... Potential meter, 86 ... Rotor, 87 ... Meter body, 88 ... Bus bar, 88a ... First bus bar, 88b ... Second bus bar, 88c ... Third bus bar, 88d, 88e ... Connecting part, 90 ... Snap fit, 91 ... Claw part, 91a ... Inclined surface, 91b ... Lower surface, 92 ... Claw bearing, 92a ... Upper end, 92b ... Lower end, 95 ... Screw

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

[Problem] To provide a flow path switch valve capable of effectively controlling the displacement between a case body and a lid that are attached by snap fits. [Solution] A flow path switch valve (1) includes a gear case body (52A), a lid (52B), and a plurality of snap fits (90). The plurality of snap fits (90) attach the lid (52B) to the gear case body (52A). The gear case body (52A) includes a plurality of positioning holes (58). The lid (52B) includes a plurality of posts (59) to be inserted into the plurality of positioning holes (58). The posts (59) are formed such that when attaching the lid (52B) to the gear case body (52A), the tips of the posts (59) are inserted into the respective positioning holes (58) before claw parts (91) of the snap fits (90) are hooked on claw receiving parts (92).

Description

流路切換弁Flow switching valve
　本発明は、流路切換弁に関する。特に、本発明は、弁体を駆動する駆動部を収容するケースが有するケース本体と蓋体とがスナップフィットで取り付けられる流路切換弁に関する。 The present invention relates to a flow path switching valve. In particular, the present invention relates to a flow path switching valve to which a case body and a lid of a case accommodating a drive unit for driving a valve body are attached by snap fit.
　従来の流路切換弁の一例が特許文献１に開示されている。この流路切換弁は、弁室を有する弁本体と、弁室内に配置されたボール状の弁体と、弁体に連結された弁軸と、弁軸を介して弁体を回転駆動する回転駆動部と、回転駆動部を収容するケースと、を有している。回転駆動部は、モーターおよび駆動ギヤを有する。 An example of a conventional flow path switching valve is disclosed in Patent Document 1. This flow path switching valve has a valve body having a valve chamber, a ball-shaped valve body arranged in the valve chamber, a valve shaft connected to the valve body, and a rotation that rotationally drives the valve body via the valve shaft. It has a drive unit and a case for accommodating the rotary drive unit. The rotary drive unit has a motor and a drive gear.
特開２０１８－１１５６９１号公報Japanese Unexamined Patent Publication No. 2018-115691
　上述した流路切換弁のケースは、上面が開口した箱状のケース本体と、ケース本体の開口を塞ぐように配置された蓋体と、を有している。蓋体は、ケース本体にねじ止めされる。このような流路切換弁において、ねじ止めに代えて、爪部と爪受部とを有する複数のスナップフィットを採用した構成のものが考えられる。スナップフィットを採用することにより、流路切換弁は、部品点数を削減できるとともに、ケース本体と蓋体とを容易に取り付けることができる。 The case of the flow path switching valve described above has a box-shaped case body having an open upper surface and a lid arranged so as to close the opening of the case body. The lid is screwed to the case body. It is conceivable that such a flow path switching valve adopts a plurality of snap fits having a claw portion and a claw receiving portion instead of screwing. By adopting the snap fit, the flow path switching valve can reduce the number of parts and can easily attach the case body and the lid.
　スナップフィットを採用した構成では、ケース本体と蓋体とを近づけ、複数のスナップフィット（具体的には爪部または爪受部）をたわませて互いに引っ掛けて、ケース本体と蓋体とを取り付ける。しかしながら、ケース本体と蓋体とを取り付ける際に各スナップフィットをたわませる力にばらつきが生じることがあった。各スナップフィットは爪部と爪受部とが同じタイミングで引っ掛かることが好ましいが、上記ばらつきにより引っ掛かるタイミングがずれてしまうことがある。これにより、ケース本体と蓋体とが位置ずれして取り付けられてしまうおそれがあった。 In the configuration that adopts snap fit, the case body and lid are brought close to each other, and multiple snap fits (specifically, claws or claw receivers) are bent and hooked on each other to attach the case body and lid. .. However, when the case body and the lid are attached, the force for bending each snap fit may vary. In each snap fit, it is preferable that the claw portion and the claw receiving portion are hooked at the same timing, but the hooking timing may be shifted due to the above variation. As a result, the case body and the lid may be misaligned and attached.
　そこで、本発明は、スナップフィットで取り付けられるケース本体と蓋体との位置ずれを効果的に抑制できる流路切換弁を提供することを目的とする。 Therefore, an object of the present invention is to provide a flow path switching valve that can effectively suppress the misalignment between the case body and the lid that are attached by snap fit.
　上記目的を達成するために、本発明の一態様に係る流路切換弁は、弁本体と、前記弁本体に回転可能に収容される弁体と、前記弁体に取り付けられる弁軸と、前記弁軸を介して前記弁体を回転駆動する駆動部と、前記弁本体に取り付けられ、前記駆動部を収容するケースと、を有する流路切換弁であって、前記ケースは、一面が開口した箱状のケース本体と、前記開口を塞ぐように配置される蓋体と、前記ケース本体と前記蓋体とを取り付ける複数のスナップフィットと、を有し、前記スナップフィットは、前記ケース本体および前記蓋体の一方に設けられた爪部と、他方に設けられ、前記爪部と引っ掛かる爪受部と、を有し、前記ケース本体および前記蓋体の前記一方は、前記ケース本体と前記蓋体との取付方向に延びる複数の位置決め穴を有し、前記ケース本体および前記蓋体の前記他方は、前記取付方向に延び、前記複数の位置決め穴に挿入される複数のポストを有し、前記ポストは、前記ケース本体と前記蓋体とを取り付ける際に前記スナップフィットの爪部と爪受部とが引っ掛かる前に当該ポストの先端が前記位置決め穴に挿入されるように形成されていることを特徴とする。 In order to achieve the above object, the flow path switching valve according to one aspect of the present invention includes a valve body, a valve body rotatably housed in the valve body, a valve shaft attached to the valve body, and the above. A flow path switching valve having a drive unit that rotationally drives the valve body via a valve shaft and a case that is attached to the valve body and accommodates the drive unit. The case is open on one side. It has a box-shaped case body, a lid arranged so as to close the opening, and a plurality of snap fits for attaching the case body and the lid, and the snap fit includes the case body and the case body. It has a claw portion provided on one side of the lid and a claw receiving portion provided on the other side and hooked on the claw portion, and the case body and the one side of the lid body are the case body and the lid body. The case body and the other of the lid have a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes. Is characterized in that the tip of the post is inserted into the positioning hole before the claw portion and the claw receiving portion of the snap fit are caught when the case body and the lid body are attached. And.
　上記目的を達成するために、本発明の他の一態様に係る流路切換弁は、弁本体と、前記弁本体に回転可能に収容される弁体と、前記弁体に取り付けられる弁軸と、前記弁軸を介して前記弁体を回転駆動する駆動部と、前記弁本体に取り付けられ、前記駆動部を収容するケースと、を有する流路切換弁であって、前記ケースは、一面が開口した箱状のケース本体と、前記開口を塞ぐように配置される蓋体と、前記ケース本体と前記蓋体とを取り付ける複数のスナップフィットと、を有し、前記スナップフィットは、前記ケース本体および前記蓋体の一方に設けられた爪部と、他方に設けられ、前記爪部と引っ掛かる爪受部と、を有し、前記ケース本体および前記蓋体の前記他方は、前記ケース本体と前記蓋体との取付方向に延びる複数の位置決め穴を有し、前記ケース本体および前記蓋体の前記一方は、前記取付方向に延び、前記複数の位置決め穴に挿入される複数のポストを有し、前記ポストは、前記ケース本体と前記蓋体とを取り付ける際に前記スナップフィットの爪部と爪受部とが引っ掛かる前に当該ポストの先端が前記位置決め穴に挿入されるように形成されていることを特徴とする。 In order to achieve the above object, the flow path switching valve according to another aspect of the present invention includes a valve body, a valve body rotatably housed in the valve body, and a valve shaft attached to the valve body. A flow path switching valve having a drive unit that rotationally drives the valve body via the valve shaft and a case that is attached to the valve body and accommodates the drive unit. It has an open box-shaped case body, a lid arranged so as to close the opening, and a plurality of snap fits for attaching the case body and the lid body, and the snap fit is the case body. And a claw portion provided on one side of the lid body and a claw receiving portion provided on the other side and hooked on the claw portion, and the case body and the other side of the lid body are the case body and the case body. It has a plurality of positioning holes extending in the mounting direction with the lid, and the case body and the one of the lids have a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes. The post is formed so that the tip of the post is inserted into the positioning hole before the claw portion and the claw receiving portion of the snap fit are caught when the case body and the lid body are attached. It is characterized by.
　本発明において、前記ケース本体の底壁部には、前記弁軸を回転可能に支持する軸受部が設けられ、前記弁軸における前記ケース本体側の端面には、当該弁軸とともに回転される嵌合軸部が突出して設けられ、前記ケースには、前記嵌合軸部と嵌合されるローターを有する回転角センサーと、前記回転角センサーを支持するセンサー支持部を有する板状のベース体と、を有する回転位置検出部が収容され、前記蓋体には、少なくとも前記センサー支持部が嵌められる凹部が設けられていることが好ましい。 In the present invention, the bottom wall portion of the case body is provided with a bearing portion that rotatably supports the valve shaft, and the end surface of the valve shaft on the case body side is fitted to be rotated together with the valve shaft. A shaft portion is provided so as to project, and the case includes a rotation angle sensor having a rotor fitted with the fitting shaft portion, and a plate-shaped base body having a sensor support portion for supporting the rotation angle sensor. It is preferable that the rotation position detecting portion having the above is accommodated, and the lid body is provided with at least a recess into which the sensor supporting portion is fitted.
　本発明によれば、駆動部を収容するケースが、一面が開口した箱状のケース本体と、ケース本体の開口を塞ぐように配置される蓋体と、ケース本体と蓋体とを取り付ける複数のスナップフィットと、を有している。スナップフィットは、ケース本体および蓋体の一方に設けられた爪部と、他方に設けられ、爪部と引っ掛かる爪受部と、を有している。ケース本体および蓋体の一方（または他方）は、当該ケース本体と蓋体との取付方向に延びる複数の位置決め穴を有している。ケース本体および蓋体の他方（または一方）は、取付方向に延び、複数の位置決め穴に挿入される複数のポストを有している。そして、ポストは、ケース本体と蓋体とを取り付ける際にスナップフィットの爪部と爪受部とが引っ掛かる前に当該ポストの先端が位置決め穴に挿入されるように形成されている。このようにしたことから、ケース本体と蓋体とを取り付ける際にポストが位置決め穴に挿入される。位置決め穴とポストとによってケース本体と蓋体とが、取付方向に移動を案内されかつ取付方向と直交する方向への移動が規制される。これにより、複数のスナップフィットに均等にたわませる力を加えることができる。そして、複数のスナップフィットの爪部と爪受部とを同じタイミングで引っ掛けることができる。これにより、ケース本体と蓋体との位置ずれを効果的に抑制して、ケース本体と蓋体とを適切に取り付けることができる。 According to the present invention, a case for accommodating a drive unit includes a box-shaped case body having an open side, a lid arranged so as to close the opening of the case body, and a plurality of cases to which the case body and the lid are attached. Has a snap fit. The snap fit has a claw portion provided on one of the case body and the lid, and a claw receiving portion provided on the other side and hooked on the claw portion. One (or the other) of the case body and the lid body has a plurality of positioning holes extending in the mounting direction between the case body and the lid body. The other (or one) of the case body and the lid has a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes. The post is formed so that the tip of the post is inserted into the positioning hole before the snap-fit claw portion and the claw receiving portion are caught when the case body and the lid are attached. As a result, the post is inserted into the positioning hole when the case body and the lid are attached. The positioning hole and the post guide the movement of the case body and the lid in the mounting direction and restrict the movement in the direction orthogonal to the mounting direction. This makes it possible to apply a force that flexes evenly to a plurality of snap fits. Then, the claw portions and the claw receiving portions of the plurality of snap fits can be hooked at the same timing. As a result, the misalignment between the case body and the lid can be effectively suppressed, and the case body and the lid can be appropriately attached.
　また、蓋体には、少なくともセンサー支持部が嵌められる凹部が設けられていることで、センサー支持部が蓋体を介してケース本体と位置決めされる。そのため、センサー支持部に支持される回転角センサーを、ケース本体の軸受部に支持される弁軸に対して適切に配置できる。 Further, since the lid body is provided with at least a recess into which the sensor support portion is fitted, the sensor support portion is positioned with the case body via the lid body. Therefore, the rotation angle sensor supported by the sensor support portion can be appropriately arranged with respect to the valve shaft supported by the bearing portion of the case body.
本発明の一実施例に係る流路切換弁の斜視図である。It is a perspective view of the flow path switching valve which concerns on one Example of this invention. 図１の流路切換弁の左側面図である。It is a left side view of the flow path switching valve of FIG. 図１の流路切換弁のギヤケース本体から蓋体を持ち上げた状態を示す左側面図である。It is a left side view which shows the state which lifted the lid body from the gear case body of the flow path switching valve of FIG. 図１の流路切換弁が有する蓋体の平面図および底面図である。It is a top view and the bottom view of the lid body of the flow path switching valve of FIG. 図１の流路切換弁の縦断面図である。It is a vertical cross-sectional view of the flow path switching valve of FIG. 図１の流路切換弁が有する弁本体の平面図である。It is a top view of the valve body which the flow path switching valve of FIG. 1 has. 図１の流路切換弁においてギヤケースの上壁部を外した状態を示す平面図である。FIG. 5 is a plan view showing a state in which the upper wall portion of the gear case is removed in the flow path switching valve of FIG. 図１の流路切換弁においてギヤケースの上壁部および回転位置検出部を外した状態を示す平面図である。It is a top view which shows the state which the upper wall part of the gear case and the rotation position detection part were removed in the flow path switching valve of FIG. 図１の流路切換弁が有する回転位置検出部を説明する図である。It is a figure explaining the rotation position detection part which the flow path switching valve of FIG. 1 has.
　以下、本発明の一実施例に係る流路切換弁について、図１～図９を参照して説明する。 Hereinafter, the flow path switching valve according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9.
　図１は、本発明の一実施例に係る流路切換弁の斜視図である。図２は、図１の流路切換弁の左側面図である。図３は、図１の流路切換弁のギヤケース本体から蓋体を持ち上げた状態を示す左側面図である。図４（ａ）、（ｂ）は、図１の流路切換弁が有する蓋体の平面図および底面図である。図５は、図１の流路切換弁におけるボール弁体の回転軸線に沿う断面図（縦断面図）である。図６は、図１の流路切換弁が有する弁本体の平面図である。図６において、弁本体の弁室にはボール弁体とシート部材とが配置されている。図７は、図１の流路切換弁においてギヤケースの上壁部を外した状態を示す平面図であり、図８は、回転位置検出部をさらに外した状態を示す平面図である。図９は、図１の流路切換弁が有する回転位置検出部を説明する図である。図９（ａ）、（ｂ）は、回転位置検出部の左側面図および平面図である。図９（ｃ）は、回転位置検出部のポテンショベースに埋め込まれるバスバーの平面図である。以下の説明において、「上下左右」は各図において各部材の相対的な位置関係を示すために用いており、絶対的な位置関係を示すものではない。各図において、Ｘ軸方向を左右方向、Ｙ軸方向を手前－奥方向（正面－背面方向）、Ｚ軸方向を上下方向としている。Ｘ軸、Ｙ軸、Ｚ軸は互いに直交している。 FIG. 1 is a perspective view of a flow path switching valve according to an embodiment of the present invention. FIG. 2 is a left side view of the flow path switching valve of FIG. FIG. 3 is a left side view showing a state in which the lid is lifted from the gear case main body of the flow path switching valve of FIG. 4 (a) and 4 (b) are a plan view and a bottom view of a lid body of the flow path switching valve of FIG. FIG. 5 is a cross-sectional view (longitudinal cross-sectional view) of the flow path switching valve of FIG. 1 along the rotation axis of the ball valve body. FIG. 6 is a plan view of the valve body of the flow path switching valve of FIG. In FIG. 6, a ball valve body and a seat member are arranged in the valve chamber of the valve body. FIG. 7 is a plan view showing a state in which the upper wall portion of the gear case is removed in the flow path switching valve of FIG. 1, and FIG. 8 is a plan view showing a state in which the rotation position detecting portion is further removed. FIG. 9 is a diagram illustrating a rotation position detection unit included in the flow path switching valve of FIG. 9 (a) and 9 (b) are a left side view and a plan view of the rotation position detection unit. FIG. 9C is a plan view of the bus bar embedded in the potentiometer base of the rotation position detection unit. In the following description, "up / down / left / right" is used to indicate the relative positional relationship of each member in each figure, and does not indicate an absolute positional relationship. In each figure, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction (front-back direction), and the Z-axis direction is the up-down direction. The X-axis, Y-axis, and Z-axis are orthogonal to each other.
　各図に示すように、本実施例の流路切換弁１は、弁本体１０と、弁体としてのボール弁体２０と、シート部材３０、３０と、弁軸４０と、を有している。また、流路切換弁１は、ケース５０と、駆動部６０と、通気部７０と、回転位置検出部８０と、を有している。 As shown in each figure, the flow path switching valve 1 of this embodiment has a valve body 10, a ball valve body 20 as a valve body, seat members 30, 30, and a valve shaft 40. .. Further, the flow path switching valve 1 has a case 50, a drive unit 60, a ventilation unit 70, and a rotation position detection unit 80.
　弁本体１０は、例えば、ポリフェニレンサルファイド（ＰＰＳ）などの合成樹脂で構成されている。弁本体１０は、上面が開口した略立方体箱状に形成されている。弁本体１０は、底壁部１５と、四角筒状の周壁部１６とを有している。周壁部１６は、左側壁部１０ａ、正面壁部１０ｂ、右側壁部１０ｃおよび背面壁部１０ｄを有している。 The valve body 10 is made of a synthetic resin such as polyphenylene sulfide (PPS), for example. The valve body 10 is formed in a substantially cubic box shape with an open upper surface. The valve body 10 has a bottom wall portion 15 and a square tubular peripheral wall portion 16. The peripheral wall portion 16 has a left side wall portion 10a, a front wall portion 10b, a right side wall portion 10c, and a back wall portion 10d.
　弁本体１０の左側壁部１０ａには、略Ｌ字状の第１流路１１が設けられている。弁本体１０の正面壁部１０ｂには、正面側に延びる直線状の第２流路１２が設けられている。弁本体１０の右側壁部１０ｃには、第１流路１１と面対称となる略Ｌ字状の第３流路１３が設けられている。第１流路１１と第２流路１２と第３流路１３とは、弁本体１０内に設けられた弁室１４に通じている。弁室１４には、合成樹脂製の円環状のシート部材３０、３０が収容されている。シート部材３０、３０は、左右方向に互いに間隔をあけて対向するように配置されている。 A substantially L-shaped first flow path 11 is provided on the left side wall portion 10a of the valve body 10. The front wall portion 10b of the valve body 10 is provided with a linear second flow path 12 extending toward the front side. The right side wall portion 10c of the valve body 10 is provided with a substantially L-shaped third flow path 13 that is plane-symmetrical with the first flow path 11. The first flow path 11, the second flow path 12, and the third flow path 13 communicate with a valve chamber 14 provided in the valve body 10. The valve chamber 14 accommodates the annular seat members 30 and 30 made of synthetic resin. The seat members 30 and 30 are arranged so as to face each other with a gap in the left-right direction.
　ボール弁体２０は、例えば、金属や合成樹脂などで構成されている。ボール弁体２０は、中空ボール状（球体状）に形成されている。ボール弁体２０は、シート部材３０、３０に回転可能に支持されている。ボール弁体２０は、弁室１４に収容されている。本実施例では弁体としてボール弁体２０を用いているが、柱状の弁体を用いてもよい。 The ball valve body 20 is made of, for example, metal or synthetic resin. The ball valve body 20 is formed in a hollow ball shape (spherical shape). The ball valve body 20 is rotatably supported by the seat members 30 and 30. The ball valve body 20 is housed in the valve chamber 14. In this embodiment, the ball valve body 20 is used as the valve body, but a columnar valve body may be used.
　ボール弁体２０の上部には、弁軸挿入孔２４が設けられている。弁軸挿入孔２４には、弁軸４０が挿入される。弁軸挿入孔２４は、当該弁軸４０の回転に伴ってボール弁体２０が回転軸線である軸線Ｌ周りに回転するように形成されている。ボール弁体２０は、軸線Ｌ周りに回転されることにより、第１流路１１、第２流路１２および第３流路１３の接続を切り換える。本実施例では、弁軸挿入孔２４は正六角形状に形成されている。 A valve shaft insertion hole 24 is provided in the upper part of the ball valve body 20. The valve shaft 40 is inserted into the valve shaft insertion hole 24. The valve shaft insertion hole 24 is formed so that the ball valve body 20 rotates around the axis L, which is the rotation axis, as the valve shaft 40 rotates. The ball valve body 20 switches the connection between the first flow path 11, the second flow path 12, and the third flow path 13 by being rotated around the axis L. In this embodiment, the valve shaft insertion hole 24 is formed in a regular hexagonal shape.
　弁軸４０は、合成樹脂製である。弁軸４０は、全体的に直線状に延びる柱形状に形成されている。弁軸４０は、円柱部４１と、円柱部４１の下端に同軸に連なる角柱部４２と、を有している。弁軸４０は軸線Ｌに沿うように配置される。 The valve shaft 40 is made of synthetic resin. The valve shaft 40 is formed in a column shape extending linearly as a whole. The valve shaft 40 has a columnar portion 41 and a prismatic portion 42 coaxially connected to the lower end of the columnar portion 41. The valve shaft 40 is arranged along the axis L.
　円柱部４１の下端部には、全周にわたって溝が設けられている。この溝には、環状に形成されたＯリング４４がはめ込まれている。Ｏリング４４は、ゴム材などの弾性材料で構成されている。円柱部４１の上端部には、駆動部６０の大径ギヤ６７が同軸に取り付けられている。また、円柱部４１における上方を向く端面４１ａの中央には取付穴４５が設けられている。取付穴４５は、軸線Ｌに沿う略円柱状に形成されている。取付穴４５には、回転位置検出部８０のポテンショ軸８１が圧入により取り付けられる。 A groove is provided at the lower end of the cylindrical portion 41 over the entire circumference. An O-ring 44 formed in an annular shape is fitted in this groove. The O-ring 44 is made of an elastic material such as a rubber material. A large-diameter gear 67 of the drive unit 60 is coaxially attached to the upper end portion of the cylindrical portion 41. Further, a mounting hole 45 is provided in the center of the end surface 41a of the columnar portion 41 facing upward. The mounting hole 45 is formed in a substantially columnar shape along the axis L. The potentiometer shaft 81 of the rotation position detection unit 80 is press-fitted into the mounting hole 45.
　角柱部４２は、柱状に形成されている。角柱部４２の横断面形状（軸線Ｌと直交する断面の形状）は、弁軸挿入孔２４と同一の正六角形状である。角柱部４２は、ボール弁体２０の弁軸挿入孔２４に挿入される。角柱部４２は、軸線Ｌに沿うように当該ボール弁体２０に取り付けられる。角柱部４２の横断面形状は弁軸挿入孔２４と同一であるので、弁軸挿入孔２４と角柱部４２とが嵌まり合う。弁軸４０の回転に伴ってボール弁体２０が軸線Ｌ周りに回転される。 The prismatic portion 42 is formed in a columnar shape. The cross-sectional shape of the prism portion 42 (the shape of the cross section orthogonal to the axis L) is the same regular hexagonal shape as the valve shaft insertion hole 24. The prism portion 42 is inserted into the valve shaft insertion hole 24 of the ball valve body 20. The prism portion 42 is attached to the ball valve body 20 along the axis L. Since the cross-sectional shape of the prism portion 42 is the same as that of the valve shaft insertion hole 24, the valve shaft insertion hole 24 and the prism portion 42 fit into each other. The ball valve body 20 is rotated around the axis L as the valve shaft 40 rotates.
　ケース５０は、例えば、ポリフェニレンサルファイド（ＰＰＳ）などの合成樹脂で構成されている。ケース５０は、弁本体１０に取り付けられている。ケース５０は、駆動部６０を収容する。ケース５０は、モーターケース５１と、ギヤケース５２と、を有している。 Case 50 is made of a synthetic resin such as polyphenylene sulfide (PPS), for example. The case 50 is attached to the valve body 10. The case 50 accommodates the drive unit 60. The case 50 includes a motor case 51 and a gear case 52.
　モーターケース５１は、有底円筒状に形成されている。モーターケース５１は、駆動部６０のモーター６１を収容する。 The motor case 51 is formed in a bottomed cylindrical shape. The motor case 51 accommodates the motor 61 of the drive unit 60.
　ギヤケース５２は、底壁部５３と、上壁部５４と、周壁部５５と、を有している。底壁部５３は、平板状に形成されている。底壁部５３には、モーターケース５１が一体的に設けられている。上壁部５４は、底壁部５３と上下方向に対向して配置される。上壁部５４には、通気部７０が設けられている。周壁部５５は、底壁部５３と上壁部５４とを連結する。底壁部５３と周壁部５５とは一体的に形成されている。底壁部５３と周壁部５５とは、上面が開口した箱状のギヤケース本体５２Ａを構成する。上壁部５４は、ギヤケース本体５２Ａの開口を塞ぐように配置される蓋体５２Ｂを構成する。ギヤケース５２は、駆動部６０の第１ウォーム６２、中間ギヤ体６３および大径ギヤ６７と、回転位置検出部８０と、を収容する。 The gear case 52 has a bottom wall portion 53, an upper wall portion 54, and a peripheral wall portion 55. The bottom wall portion 53 is formed in a flat plate shape. A motor case 51 is integrally provided on the bottom wall portion 53. The upper wall portion 54 is arranged so as to face the bottom wall portion 53 in the vertical direction. The upper wall portion 54 is provided with a ventilation portion 70. The peripheral wall portion 55 connects the bottom wall portion 53 and the upper wall portion 54. The bottom wall portion 53 and the peripheral wall portion 55 are integrally formed. The bottom wall portion 53 and the peripheral wall portion 55 form a box-shaped gear case main body 52A having an open upper surface. The upper wall portion 54 constitutes a lid 52B arranged so as to close the opening of the gear case main body 52A. The gear case 52 accommodates the first worm 62 of the drive unit 60, the intermediate gear body 63, the large-diameter gear 67, and the rotation position detection unit 80.
　ギヤケース５２は、複数のスナップフィット９０を有している。複数のスナップフィット９０は、ギヤケース本体５２Ａと蓋体５２Ｂとを互いに取り付ける。各スナップフィット９０は、爪部９１と、爪受部９２と、を有している。爪部９１は、ギヤケース本体５２Ａの周壁部５５に設けられている。爪受部９２は、蓋体５２Ｂに設けられている。爪受部９２は、Ｕ字形状を有する。爪部９１は、下方に向かうにしたがって徐々に外側に向かう傾斜面９１ａと、下方を向く平面状の下面９１ｂと、を有している。爪受部９２のＵ字形状の上端部９２ａが、蓋体５２Ｂの側面に連設されている。爪受部９２のＵ字形状の下端部９２ｂが、爪部９１の下面９１ｂと引っ掛かるように配置されている。複数のスナップフィット９０が有する複数の爪部９１は、それぞれ同一形状に形成されており、上下方向（Ｚ軸方向）の位置が同一である。複数のスナップフィット９０が有する複数の爪受部９２も、それぞれが同一形状に形成されており、上下方向の位置が同一である。なお、ギヤケース本体５２Ａが爪受部９２を有し、蓋体５２Ｂが爪部９１を有していてもよい。爪部９１および爪受部９２は、本発明の目的に反しない限り、それらの形状は任意である。 The gear case 52 has a plurality of snap fits 90. The plurality of snap fits 90 attach the gear case body 52A and the lid 52B to each other. Each snap-fit 90 has a claw portion 91 and a claw receiving portion 92. The claw portion 91 is provided on the peripheral wall portion 55 of the gear case main body 52A. The claw receiving portion 92 is provided on the lid body 52B. The claw receiving portion 92 has a U-shape. The claw portion 91 has an inclined surface 91a that gradually goes outward as it goes downward, and a flat lower surface 91b that faces downward. A U-shaped upper end portion 92a of the claw receiving portion 92 is continuously provided on the side surface of the lid body 52B. The U-shaped lower end portion 92b of the claw receiving portion 92 is arranged so as to be hooked on the lower surface 91b of the claw portion 91. The plurality of claw portions 91 included in the plurality of snap fits 90 are each formed to have the same shape, and the positions in the vertical direction (Z-axis direction) are the same. The plurality of claw receiving portions 92 included in the plurality of snap fits 90 are also formed in the same shape, and are positioned in the same vertical direction. The gear case body 52A may have the claw receiving portion 92, and the lid 52B may have the claw portion 91. The shape of the claw portion 91 and the claw receiving portion 92 is arbitrary as long as it does not contradict the object of the present invention.
　ギヤケース本体５２Ａは、複数の位置決め穴５８を有している。蓋体５２Ｂは、複数のポスト５９を有している。複数のポスト５９は、複数の位置決め穴５８に対応して配置されている。複数の位置決め穴５８および複数のポスト５９は、同一の径を有している。複数の位置決め穴５８および複数のポスト５９は、それぞれがギヤケース本体５２Ａと蓋体５２Ｂとの取付方向（Ｚ軸方向）に延びるように形成されている。各ポスト５９は、ギヤケース本体５２Ａと蓋体５２Ｂとを取り付ける際に、各スナップフィット９０の爪部９１と爪受部９２とが引っ掛かる前にポスト５９の先端が位置決め穴５８に挿入されるように形成されている。換言すると、ギヤケース本体５２Ａと蓋体５２Ｂとを取付方向に対向するように配置したとき、爪部９１の下面９１ｂから爪受部９２の下端部９２ｂ（下面９１ｂと引っ掛かる箇所）までの距離より、位置決め穴５８からポスト５９までの距離の方が短い。なお、ギヤケース本体５２Ａが複数のポスト５９を有し、蓋体５２Ｂが複数の位置決め穴５８を有する構成を採用してもよい。すなわち、位置決め穴５８およびポスト５９をギヤケース本体５２Ａおよび蓋体５２Ｂのどちらに設けてもよい。また、スナップフィット９０の爪部９１および爪受部９２についても、位置決め穴５８およびポスト５９とは関係なく、ギヤケース本体５２Ａおよび蓋体５２Ｂのどちらに設けてもよい。 The gear case body 52A has a plurality of positioning holes 58. The lid 52B has a plurality of posts 59. The plurality of posts 59 are arranged corresponding to the plurality of positioning holes 58. The plurality of positioning holes 58 and the plurality of posts 59 have the same diameter. The plurality of positioning holes 58 and the plurality of posts 59 are formed so as to extend in the mounting direction (Z-axis direction) of the gear case main body 52A and the lid 52B, respectively. When attaching the gear case body 52A and the lid 52B, each post 59 is inserted so that the tip of the post 59 is inserted into the positioning hole 58 before the claw portion 91 and the claw receiving portion 92 of each snap fit 90 are caught. It is formed. In other words, when the gear case body 52A and the lid 52B are arranged so as to face each other in the mounting direction, the distance from the lower surface 91b of the claw portion 91 to the lower end portion 92b of the claw receiving portion 92 (the place where the lower surface 91b is caught) is determined. The distance from the positioning hole 58 to the post 59 is shorter. The gear case main body 52A may have a plurality of posts 59, and the lid 52B may have a plurality of positioning holes 58. That is, the positioning hole 58 and the post 59 may be provided in either the gear case main body 52A or the lid 52B. Further, the claw portion 91 and the claw receiving portion 92 of the snap fit 90 may be provided on either the gear case main body 52A or the lid 52B regardless of the positioning hole 58 and the post 59.
　蓋体５２Ｂの下面５４ａには、凹部５４ｂが設けられている。凹部５４ｂは、回転位置検出部８０が有するポテンショベース８２の外形と同一形状を有している。凹部５４ｂは、ギヤケース本体５２Ａと蓋体５２Ｂとが取り付けられると、ポテンショベース８２全体が嵌まるように設けられている。これにより、蓋体５２Ｂを介して、ギヤケース本体５２Ａとポテンショベース８２とが位置決めされる。凹部５４ｂは、少なくともポテンショベース８２のセンサー支持部８４が嵌まるように設けられていればよい。 A recess 54b is provided on the lower surface 54a of the lid 52B. The recess 54b has the same shape as the outer shape of the potentiometer base 82 included in the rotation position detection unit 80. The recess 54b is provided so that the entire potentiometer base 82 fits when the gear case main body 52A and the lid body 52B are attached. As a result, the gear case main body 52A and the potentiometer base 82 are positioned via the lid body 52B. The recess 54b may be provided so that at least the sensor support portion 84 of the potentiometer base 82 is fitted.
　ギヤケース５２は、円筒状の軸受部５６を有している。軸受部５６は、底壁部５３に一体的に設けられている。軸受部５６には、弁軸４０の円柱部４１が挿入される。軸受部５６は、円柱部４１を回転可能に支持する。弁軸４０は、軸受部５６に回転可能に支持される。弁軸４０は、弁本体１０とギヤケース５２とにまたがって配置される。また、ギヤケース５２は、四角筒状の内側周壁部５７を有している。内側周壁部５７は、底壁部５３から下方に突出して設けられた環状壁部である。内側周壁部５７は、弁本体１０の内側に挿入され、超音波溶着や赤外線溶着により弁本体１０の周壁部１６に接合されている。 The gear case 52 has a cylindrical bearing portion 56. The bearing portion 56 is integrally provided on the bottom wall portion 53. A cylindrical portion 41 of the valve shaft 40 is inserted into the bearing portion 56. The bearing portion 56 rotatably supports the cylindrical portion 41. The valve shaft 40 is rotatably supported by the bearing portion 56. The valve shaft 40 is arranged so as to straddle the valve body 10 and the gear case 52. Further, the gear case 52 has a square tubular inner peripheral wall portion 57. The inner peripheral wall portion 57 is an annular wall portion provided so as to project downward from the bottom wall portion 53. The inner peripheral wall portion 57 is inserted inside the valve main body 10 and is joined to the peripheral wall portion 16 of the valve main body 10 by ultrasonic welding or infrared welding.
　駆動部６０は、弁軸４０を介してボール弁体２０を回転駆動する。駆動部６０は、モーター６１と、第１ウォーム６２、中間ギヤ体６３および大径ギヤ６７と、を有している。第１ウォーム６２、中間ギヤ体６３および大径ギヤ６７は、減速機を構成する。 The drive unit 60 rotationally drives the ball valve body 20 via the valve shaft 40. The drive unit 60 includes a motor 61, a first worm 62, an intermediate gear body 63, and a large-diameter gear 67. The first worm 62, the intermediate gear body 63, and the large diameter gear 67 constitute a speed reducer.
　モーター６１は、モーターケース５１内に配置されている。モーター６１の駆動軸６１ａは、ギヤケース５２の底壁部５３に設けられた貫通孔からギヤケース５２内に突き出ている。駆動軸６１ａの先端には、第１ウォーム６２が取り付けられる。 The motor 61 is arranged in the motor case 51. The drive shaft 61a of the motor 61 protrudes into the gear case 52 from a through hole provided in the bottom wall portion 53 of the gear case 52. A first worm 62 is attached to the tip of the drive shaft 61a.
　中間ギヤ体６３は、ギヤケース５２内に配置されている。中間ギヤ体６３は、軸部６４と、小径ギヤ６５（第１ウォームホイール）と、第２ウォーム６６と、を有している。小径ギヤ６５は、軸部６４の一端部６４ａに設けられている。小径ギヤ６５は、第１ウォーム６２と噛み合う。第２ウォーム６６は、軸部６４の他端部６４ｂに設けられている。第２ウォーム６６は、大径ギヤ６７（第２ウォームホイール）と噛み合う。 The intermediate gear body 63 is arranged in the gear case 52. The intermediate gear body 63 has a shaft portion 64, a small diameter gear 65 (first worm wheel), and a second worm 66. The small diameter gear 65 is provided at one end 64a of the shaft portion 64. The small diameter gear 65 meshes with the first worm 62. The second worm 66 is provided at the other end 64b of the shaft 64. The second worm 66 meshes with the large diameter gear 67 (second worm wheel).
　大径ギヤ６７は、ギヤケース５２内に配置されている。大径ギヤ６７は、円板状に形成されている。大径ギヤ６７の中央に設けられた貫通孔には、弁軸４０の円柱部４１が圧入されている。大径ギヤ６７は、弁軸４０におけるギヤケース５２側の端部に取り付けられている。大径ギヤ６７は、駆動ギヤである。 The large diameter gear 67 is arranged in the gear case 52. The large-diameter gear 67 is formed in a disk shape. The cylindrical portion 41 of the valve shaft 40 is press-fitted into the through hole provided in the center of the large-diameter gear 67. The large-diameter gear 67 is attached to the end of the valve shaft 40 on the gear case 52 side. The large diameter gear 67 is a drive gear.
　駆動部６０は、モーター６１の駆動軸６１ａの回転力を、第１ウォーム６２、中間ギヤ体６３および大径ギヤ６７を介して弁軸４０に伝達して、弁軸４０を軸線Ｌ周りに回転させる。これにより、ボール弁体２０を所望の回転位置に位置づける。 The drive unit 60 transmits the rotational force of the drive shaft 61a of the motor 61 to the valve shaft 40 via the first worm 62, the intermediate gear body 63, and the large diameter gear 67, and rotates the valve shaft 40 around the axis L. Let me. As a result, the ball valve body 20 is positioned at a desired rotation position.
　回転位置検出部８０は、回転角出力軸であるポテンショ軸８１と、ベース体であるポテンショベース８２と、回転角センサーであるポテンショメーター８５と、を有している。 The rotation position detection unit 80 has a potentiometer shaft 81 which is a rotation angle output shaft, a potentiometer base 82 which is a base body, and a potentiometer 85 which is a rotation angle sensor.
　ポテンショ軸８１は、例えば、ステンレスや真ちゅうなどの金属製またはポリフェニレンサルファイド（ＰＰＳ）などの合成樹脂製である。ポテンショ軸８１は、弁軸４０と別体である。ポテンショ軸８１は、弁軸４０の端面４１ａ（ギヤケース本体５２Ａ側の端面）に設けられた取付穴４５に圧入される。ポテンショ軸８１は、弁軸４０に同軸に固定して取り付けられる。ポテンショ軸８１の上端部には、Ｄカット形状の嵌合軸部８１ａが設けられている。ポテンショ軸８１の嵌合軸部８１ａは、端面４１ａから突出するように配置される。嵌合軸部８１ａは、ポテンショメーター８５のローター８６と嵌め合わされる。なお、嵌合軸部８１ａが弁軸４０の端面４１ａに一体的に設けられていてもよい。 The potentiometer shaft 81 is made of, for example, a metal such as stainless steel or brass or a synthetic resin such as polyphenylene sulfide (PPS). The potentiometer shaft 81 is separate from the valve shaft 40. The potentiometer shaft 81 is press-fitted into the mounting hole 45 provided on the end surface 41a (end surface on the gear case body 52A side) of the valve shaft 40. The potentiometer shaft 81 is coaxially fixed and attached to the valve shaft 40. A D-cut shaped fitting shaft portion 81a is provided at the upper end portion of the potentiometer shaft 81. The fitting shaft portion 81a of the potentiometer shaft 81 is arranged so as to project from the end surface 41a. The fitting shaft portion 81a is fitted with the rotor 86 of the potentiometer 85. The fitting shaft portion 81a may be integrally provided on the end surface 41a of the valve shaft 40.
　ポテンショベース８２は、ベース本体部８３と、センサー支持部８４と、を一体的に有している。ベース本体部８３は、略平板状に形成されている。ギヤケース５２の底壁部５３には、上方に突出する円柱状のボス５３ｃ、５３ｃが設けられている。ベース本体部８３は、ボス５３ｃ、５３ｃにねじ９５、９５によって固定される。センサー支持部８４は、大径ギヤ６７より小さい径の略円板状に形成されている。センサー支持部８４の中央には、ポテンショメーター８５が取り付けられている。センサー支持部８４は、ギヤケース５２内において、大径ギヤ６７の上方に重なるように配置されている。 The potentiometer base 82 integrally has a base main body portion 83 and a sensor support portion 84. The base main body 83 is formed in a substantially flat plate shape. The bottom wall portion 53 of the gear case 52 is provided with columnar bosses 53c and 53c protruding upward. The base main body 83 is fixed to the bosses 53c and 53c by screws 95 and 95. The sensor support portion 84 is formed in a substantially disk shape having a diameter smaller than that of the large diameter gear 67. A potentiometer 85 is attached to the center of the sensor support portion 84. The sensor support portion 84 is arranged in the gear case 52 so as to overlap the large diameter gear 67.
　ポテンショベース８２は、インサート成形によって一体化された合成樹脂と金属製のバスバー８８とで構成されている。本実施例において、図９に示すように、バスバー８８は、第１バスバー８８ａと、第２バスバー８８ｂと、第３バスバー８８ｃと、を有している。インサート成形前は、第１バスバー８８ａと第２バスバー８８ｂとが連結部８８ｄによって連結されており、第２バスバー８８ｂと第３バスバー８８ｃとが連結部８８ｅによって連結されている。これにより、第１バスバー８８ａ、第２バスバー８８ｂおよび第３バスバー８８ｃを１つの部品として取り扱うことができる。また、これにより、インサート成形における金型への設置および金型上での位置決めを容易に行うことができる。そして、インサート成形後は、連結部８８ｄ、８８ｅが露出されており、パンチ工具等で打ち抜いて貫通孔８９を形成することにより連結部８８ｄ、８８ｅを切断する。これにより、第１バスバー８８ａ、第２バスバー８８ｂおよび第３バスバー８８ｃが電気的に切り離される。第１バスバー８８ａ、第２バスバー８８ｂおよび第３バスバー８８ｃには、ポテンショメーター８５の端子が接続される。 The potentiometer base 82 is composed of a synthetic resin integrated by insert molding and a metal bus bar 88. In this embodiment, as shown in FIG. 9, the bus bar 88 has a first bus bar 88a, a second bus bar 88b, and a third bus bar 88c. Before insert molding, the first bus bar 88a and the second bus bar 88b are connected by the connecting portion 88d, and the second bus bar 88b and the third bus bar 88c are connected by the connecting portion 88e. As a result, the first bus bar 88a, the second bus bar 88b, and the third bus bar 88c can be handled as one component. Further, this makes it possible to easily perform the installation on the mold and the positioning on the mold in the insert molding. After the insert molding, the connecting portions 88d and 88e are exposed, and the connecting portions 88d and 88e are cut by punching with a punch tool or the like to form a through hole 89. As a result, the first bus bar 88a, the second bus bar 88b, and the third bus bar 88c are electrically separated. The terminals of the potentiometer 85 are connected to the first bus bar 88a, the second bus bar 88b, and the third bus bar 88c.
　ポテンショメーター８５は、回転角（回転角度）を検出するための回転角センサーである。ポテンショメーター８５は、円板状のローター８６と、メーター本体部８７と、を有している。メーター本体部８７は、ローター８６を回転可能に支持する。メーター本体部８７は、ローター８６の回転角に応じた信号（電圧）を出力する信号出力部である。ローター８６の中央には、平面視Ｄ字状の嵌合孔が設けられている。嵌合孔には、ポテンショ軸８１の嵌合軸部８１ａが貫通される。嵌合軸部８１ａとともにローター８６が回転されるように、嵌合軸部８１ａと嵌合孔とが嵌め合わされる。ローター８６は、嵌合軸部８１ａの回転に伴って回転される。これにより、ポテンショメーター８５は、ポテンショ軸８１（すなわち、弁軸４０およびボール弁体２０）の軸線Ｌ周りの回転角を検出する。 The potentiometer 85 is a rotation angle sensor for detecting the rotation angle (rotation angle). The potentiometer 85 has a disc-shaped rotor 86 and a meter main body 87. The meter body 87 rotatably supports the rotor 86. The meter main body 87 is a signal output unit that outputs a signal (voltage) according to the rotation angle of the rotor 86. A D-shaped fitting hole in a plan view is provided in the center of the rotor 86. The fitting shaft portion 81a of the potentiometer shaft 81 is penetrated through the fitting hole. The fitting shaft portion 81a and the fitting hole are fitted so that the rotor 86 is rotated together with the fitting shaft portion 81a. The rotor 86 is rotated with the rotation of the fitting shaft portion 81a. As a result, the potentiometer 85 detects the rotation angle of the potentiometer shaft 81 (that is, the valve shaft 40 and the ball valve body 20) around the axis L.
　流路切換弁１は、駆動部６０が有するモーター６１の駆動軸６１ａの回転力が大径ギヤ６７等を介して弁軸４０に出力され、弁軸４０が軸線Ｌ周りに回転される。弁軸４０の回転に伴ってボール弁体２０が軸線Ｌ周りに回転されて、ボール弁体２０は各回転位置に位置づけられる。これにより、ボール弁体２０の回転位置に応じた流路の接続が実現される。また、弁軸４０とともにポテンショ軸８１が軸線Ｌ周りに回転される。ポテンショ軸８１の回転角に応じた信号がポテンショメーター８５から出力される。ポテンショメーター８５から出力された信号に基づいて、ボール弁体２０の回転位置を監視することができる。 In the flow path switching valve 1, the rotational force of the drive shaft 61a of the motor 61 of the drive unit 60 is output to the valve shaft 40 via the large diameter gear 67 or the like, and the valve shaft 40 is rotated around the axis L. The ball valve body 20 is rotated around the axis L with the rotation of the valve shaft 40, and the ball valve body 20 is positioned at each rotation position. As a result, the connection of the flow path according to the rotation position of the ball valve body 20 is realized. Further, the potentiometer shaft 81 is rotated around the axis L together with the valve shaft 40. A signal corresponding to the rotation angle of the potentiometer shaft 81 is output from the potentiometer 85. The rotational position of the ball valve body 20 can be monitored based on the signal output from the potentiometer 85.
　次に、上述した流路切換弁１が有するギヤケース本体５２Ａと蓋体５２Ｂとの取付方法について説明する。 Next, a method of attaching the gear case main body 52A and the lid 52B included in the flow path switching valve 1 described above will be described.
　ギヤケース本体５２Ａと蓋体５２Ｂとを取付方向（Ｚ軸方向）に対向するように配置する。蓋体５２Ｂをギヤケース本体５２Ａに徐々に近づけて、蓋体５２Ｂの複数のポスト５９の先端を、各ポスト５９に対応するギヤケース本体５２Ａの複数の位置決め穴５８に挿入する。そして、蓋体５２Ｂをギヤケース本体５２Ａにさらに近づけてポスト５９の位置決め穴５８への挿入を進める。これにより、複数のスナップフィット９０の爪受部９２の下端部９２ｂが爪部９１の傾斜面９１ａに乗り上げて、爪受部９２が外側に向かってたわむ。このとき、位置決め穴５８とポスト５９とによって、蓋体５２Ｂの取付方向への移動が案内されかつ取付方向と直交する方向への移動が規制される。そのため、各爪受部９２にはたわませる力が均等に加えられる。そして、蓋体５２Ｂをギヤケース本体５２Ａにさらに近づける。すると、各爪受部９２が傾斜面９１ａを乗り越えて元の形状に復元し、各爪受部９２の下端部９２ｂが爪部９１の下面９１ｂに同じタイミングで引っ掛かる。これにより、ギヤケース本体５２Ａと蓋体５２Ｂとが取り付けられる。 The gear case body 52A and the lid 52B are arranged so as to face each other in the mounting direction (Z-axis direction). The lid 52B is gradually brought closer to the gear case body 52A, and the tips of the plurality of posts 59 of the lid 52B are inserted into the plurality of positioning holes 58 of the gear case body 52A corresponding to each post 59. Then, the lid body 52B is brought closer to the gear case main body 52A, and the post 59 is inserted into the positioning hole 58. As a result, the lower end portions 92b of the claw receiving portions 92 of the plurality of snap fits 90 ride on the inclined surface 91a of the claw portions 91, and the claw receiving portions 92 bend outward. At this time, the positioning hole 58 and the post 59 guide the movement of the lid 52B in the mounting direction and restrict the movement in the direction orthogonal to the mounting direction. Therefore, the bending force is evenly applied to each claw receiving portion 92. Then, the lid body 52B is brought closer to the gear case main body 52A. Then, each claw receiving portion 92 gets over the inclined surface 91a and is restored to the original shape, and the lower end portion 92b of each claw receiving portion 92 is hooked on the lower surface 91b of the claw portion 91 at the same timing. As a result, the gear case main body 52A and the lid body 52B are attached.
　以上より、本実施例の流路切換弁１によれば、駆動部６０を収容するギヤケース５２が、一面が開口した箱状のギヤケース本体５２Ａと、ギヤケース本体５２Ａの開口を塞ぐように配置される蓋体５２Ｂと、ギヤケース本体５２Ａと蓋体５２Ｂとを取り付ける複数のスナップフィット９０と、を有している。スナップフィット９０は、ギヤケース本体５２Ａに設けられた爪部９１と、蓋体５２Ｂに設けられ、爪部９１と引っ掛かる爪受部９２と、を有している。ギヤケース本体５２Ａは、ギヤケース本体５２Ａと蓋体５２Ｂとの取付方向に延びる複数の位置決め穴５８を有している。蓋体５２Ｂは、取付方向に延び、複数の位置決め穴５８に挿入される複数のポスト５９を有している。そして、ポスト５９は、ギヤケース本体５２Ａと蓋体５２Ｂとを取り付ける際に、スナップフィット９０の爪部９１と爪受部９２とが引っ掛かる前に当該ポスト５９の先端が位置決め穴５８に挿入されるように形成されている。このようにしたことから、ギヤケース本体５２Ａと蓋体５２Ｂとを取り付ける際にポスト５９が位置決め穴５８に挿入される。位置決め穴５８とポスト５９とによってギヤケース本体５２Ａと蓋体５２Ｂとが、取付方向に移動を案内されかつ取付方向と直交する方向への移動が規制される。これにより、複数のスナップフィット９０に均等にたわませる力を加えることができる。そして、複数のスナップフィット９０において爪部９１と爪受部９２とを同じタイミングで引っ掛けることができる。これにより、ギヤケース本体５２Ａと蓋体５２Ｂとの位置ずれを効果的に抑制して、ギヤケース本体５２Ａと蓋体５２Ｂとを適切に取り付けることができる。 From the above, according to the flow path switching valve 1 of the present embodiment, the gear case 52 accommodating the drive unit 60 is arranged so as to close the openings of the box-shaped gear case main body 52A having one side open and the gear case main body 52A. It has a lid 52B, and a plurality of snap fits 90 for attaching the gear case main body 52A and the lid 52B. The snap fit 90 has a claw portion 91 provided on the gear case main body 52A and a claw receiving portion 92 provided on the lid body 52B and hooked on the claw portion 91. The gear case main body 52A has a plurality of positioning holes 58 extending in the mounting direction between the gear case main body 52A and the lid body 52B. The lid 52B has a plurality of posts 59 extending in the mounting direction and inserted into the plurality of positioning holes 58. Then, when the gear case body 52A and the lid 52B are attached to the post 59, the tip of the post 59 is inserted into the positioning hole 58 before the claw portion 91 and the claw receiving portion 92 of the snap fit 90 are caught. Is formed in. Therefore, the post 59 is inserted into the positioning hole 58 when the gear case main body 52A and the lid body 52B are attached. The positioning hole 58 and the post 59 guide the movement of the gear case body 52A and the lid 52B in the mounting direction and restrict the movement in the direction orthogonal to the mounting direction. As a result, a force for evenly bending the plurality of snap fits 90 can be applied. Then, the claw portion 91 and the claw receiving portion 92 can be hooked at the same timing in the plurality of snap fits 90. As a result, the misalignment between the gear case main body 52A and the lid body 52B can be effectively suppressed, and the gear case main body 52A and the lid body 52B can be appropriately attached.
　また、蓋体５２Ｂには、ポテンショベース８２が嵌められる凹部５４ｂが設けられている。このようにすることで、ポテンショベース８２のセンサー支持部８４が蓋体５２Ｂを介してギヤケース本体５２Ａと位置決めされる。そのため、センサー支持部８４に支持されるポテンショメーター８５を、ギヤケース本体５２Ａの軸受部５６に支持される弁軸４０に対して適切に配置できる。 Further, the lid 52B is provided with a recess 54b into which the potentiometer base 82 is fitted. By doing so, the sensor support portion 84 of the potentiometer base 82 is positioned with the gear case main body 52A via the lid body 52B. Therefore, the potentiometer 85 supported by the sensor support portion 84 can be appropriately arranged with respect to the valve shaft 40 supported by the bearing portion 56 of the gear case main body 52A.
　上記に本発明の実施例を説明したが、本発明はこれらの例に限定されるものではない。前述の実施例に対して、当業者が適宜、構成要素の追加、削除、設計変更を行ったものや、実施例の特徴を適宜組み合わせたものも、本発明の趣旨に反しない限り、本発明の範囲に含まれる。 Although examples of the present invention have been described above, the present invention is not limited to these examples. As long as the gist of the present invention is not contrary to the above-described embodiment, those skilled in the art appropriately adding, deleting, or changing the design, or combining the features of the examples as appropriate are also present inventions. Is included in the range of.
　１…流路切換弁、１０…弁本体、１０ａ…左側壁部、１０ｂ…正面壁部、１０ｃ…右側壁部、１０ｄ…背面壁部、１１…第１流路、１２…第２流路、１３…第３流路、１４…弁室、１５…底壁部、１６…周壁部、２０…ボール弁体、２４…弁軸挿入孔、３０…シート部材、４０…弁軸、４１…円柱部、４１ａ…端面、４２…角柱部、４４…Ｏリング、４５…取付穴、５０…ケース、５１…モーターケース、５２…ギヤケース、５２Ａ…ギヤケース本体、５２Ｂ…蓋体、５３…底壁部、５３ｃ…ボス、５４…上壁部、５４ａ…下面、５４ｂ…凹部、５５…周壁部、５６…軸受部、５７…内側周壁部、５８…位置決め穴、５９…ポスト、６０…駆動部、６１…モーター、６１ａ…駆動軸、６２…第１ウォーム、６３…中間ギヤ体、６４…軸部、６４ａ…一端部、６４ｂ…他端部、６５…小径ギヤ、６６…第２ウォーム、６７…大径ギヤ、７０…通気部、８０…回転位置検出部、８１…ポテンショ軸、８１ａ…嵌合軸部、８２…ポテンショベース、８３…ベース本体部、８４…センサー支持部、８５…ポテンショメーター、８６…ローター、８７…メーター本体部、８８…バスバー、８８ａ…第１バスバー、８８ｂ…第２バスバー、８８ｃ…第３バスバー、８８ｄ、８８ｅ…連結部、９０…スナップフィット、９１…爪部、９１ａ…傾斜面、９１ｂ…下面、９２…爪受部、９２ａ…上端部、９２ｂ…下端部、９５…ねじ 1 ... Flow path switching valve, 10 ... Valve body, 10a ... Left side wall part, 10b ... Front wall part, 10c ... Right side wall part, 10d ... Back wall part, 11 ... First flow path, 12 ... Second flow path, 13 ... 3rd flow path, 14 ... valve chamber, 15 ... bottom wall part, 16 ... peripheral wall part, 20 ... ball valve body, 24 ... valve shaft insertion hole, 30 ... seat member, 40 ... valve shaft, 41 ... columnar part , 41a ... end face, 42 ... square column, 44 ... O ring, 45 ... mounting hole, 50 ... case, 51 ... motor case, 52 ... gear case, 52A ... gear case body, 52B ... lid, 53 ... bottom wall, 53c ... Boss, 54 ... Upper wall, 54a ... Lower surface, 54b ... Recess, 55 ... Peripheral wall, 56 ... Bearing, 57 ... Inner peripheral wall, 58 ... Positioning hole, 59 ... Post, 60 ... Drive, 61 ... Motor , 61a ... drive shaft, 62 ... first worm, 63 ... intermediate gear body, 64 ... shaft part, 64a ... one end, 64b ... other end, 65 ... small diameter gear, 66 ... second worm, 67 ... large diameter gear , 70 ... Ventilation part, 80 ... Rotation position detection part, 81 ... Potential shaft, 81a ... Fitting shaft, 82 ... Potential base, 83 ... Base body, 84 ... Sensor support, 85 ... Potential meter, 86 ... Rotor, 87 ... Meter body, 88 ... Bus bar, 88a ... First bus bar, 88b ... Second bus bar, 88c ... Third bus bar, 88d, 88e ... Connecting part, 90 ... Snap fit, 91 ... Claw part, 91a ... Inclined surface, 91b ... Lower surface, 92 ... Claw bearing, 92a ... Upper end, 92b ... Lower end, 95 ... Screw

Claims (3)

  1. 　弁本体と、前記弁本体に回転可能に収容される弁体と、前記弁体に取り付けられる弁軸と、前記弁軸を介して前記弁体を回転駆動する駆動部と、前記弁本体に取り付けられ、前記駆動部を収容するケースと、を有する流路切換弁であって、
    　前記ケースは、一面が開口した箱状のケース本体と、前記開口を塞ぐように配置される蓋体と、前記ケース本体と前記蓋体とを取り付ける複数のスナップフィットと、を有し、
    　前記スナップフィットは、前記ケース本体および前記蓋体の一方に設けられた爪部と、他方に設けられ、前記爪部と引っ掛かる爪受部と、を有し、
    　前記ケース本体および前記蓋体の前記一方は、前記ケース本体と前記蓋体との取付方向に延びる複数の位置決め穴を有し、
    　前記ケース本体および前記蓋体の前記他方は、前記取付方向に延び、前記複数の位置決め穴に挿入される複数のポストを有し、
    　前記ポストは、前記ケース本体と前記蓋体とを取り付ける際に前記スナップフィットの爪部と爪受部とが引っ掛かる前に当該ポストの先端が前記位置決め穴に挿入されるように形成されていることを特徴とする流路切換弁。     A valve body, a valve body rotatably housed in the valve body, a valve shaft attached to the valve body, a drive unit for rotationally driving the valve body via the valve shaft, and attachment to the valve body. A flow path switching valve having a case for accommodating the drive unit.
    The case has a box-shaped case body having an opening on one side, a lid arranged so as to close the opening, and a plurality of snap fits for attaching the case body and the lid.
    The snap fit has a claw portion provided on one of the case body and the lid body, and a claw receiving portion provided on the other side and hooked on the claw portion.
    The case body and one of the lids have a plurality of positioning holes extending in the mounting direction between the case body and the lid.
    The case body and the other of the lids have a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes.
    The post is formed so that the tip of the post is inserted into the positioning hole before the claw portion and the claw receiving portion of the snap fit are caught when the case body and the lid body are attached. A flow path switching valve characterized by.
  2. 　弁本体と、前記弁本体に回転可能に収容される弁体と、前記弁体に取り付けられる弁軸と、前記弁軸を介して前記弁体を回転駆動する駆動部と、前記弁本体に取り付けられ、前記駆動部を収容するケースと、を有する流路切換弁であって、
    　前記ケースは、一面が開口した箱状のケース本体と、前記開口を塞ぐように配置される蓋体と、前記ケース本体と前記蓋体とを取り付ける複数のスナップフィットと、を有し、
    　前記スナップフィットは、前記ケース本体および前記蓋体の一方に設けられた爪部と、他方に設けられ、前記爪部と引っ掛かる爪受部と、を有し、
    　前記ケース本体および前記蓋体の前記他方は、前記ケース本体と前記蓋体との取付方向に延びる複数の位置決め穴を有し、
    　前記ケース本体および前記蓋体の前記一方は、前記取付方向に延び、前記複数の位置決め穴に挿入される複数のポストを有し、
    　前記ポストは、前記ケース本体と前記蓋体とを取り付ける際に前記スナップフィットの爪部と爪受部とが引っ掛かる前に当該ポストの先端が前記位置決め穴に挿入されるように形成されていることを特徴とする流路切換弁。     A valve body, a valve body rotatably housed in the valve body, a valve shaft attached to the valve body, a drive unit for rotationally driving the valve body via the valve shaft, and attachment to the valve body. A flow path switching valve having a case for accommodating the drive unit.
    The case has a box-shaped case body having an opening on one side, a lid arranged so as to close the opening, and a plurality of snap fits for attaching the case body and the lid.
    The snap fit has a claw portion provided on one of the case body and the lid body, and a claw receiving portion provided on the other side and hooked on the claw portion.
    The case body and the other side of the lid body have a plurality of positioning holes extending in the mounting direction between the case body and the lid body.
    The case body and the one of the lids have a plurality of posts extending in the mounting direction and inserted into the plurality of positioning holes.
    The post is formed so that the tip of the post is inserted into the positioning hole before the claw portion and the claw receiving portion of the snap fit are caught when the case body and the lid body are attached. A flow path switching valve characterized by.
  3. 　前記ケース本体の底壁部には、前記弁軸を回転可能に支持する軸受部が設けられ、
    　前記弁軸における前記ケース本体側の端面には、当該弁軸とともに回転される嵌合軸部が突出して設けられ、
    　前記ケースには、前記嵌合軸部と嵌合されるローターを有する回転角センサーと、前記回転角センサーを支持するセンサー支持部を有する板状のベース体と、を有する回転位置検出部が収容され、
    　前記蓋体には、少なくとも前記センサー支持部が嵌められる凹部が設けられている、請求項１または請求項２に記載の流路切換弁。     A bearing portion that rotatably supports the valve shaft is provided on the bottom wall portion of the case body.
    A fitting shaft portion that rotates together with the valve shaft is provided on the end surface of the valve shaft on the case body side so as to project.
    The case houses a rotation position detection unit having a rotation angle sensor having a rotor fitted with the fitting shaft portion and a plate-shaped base body having a sensor support portion for supporting the rotation angle sensor. Being done
    The flow path switching valve according to claim 1 or 2, wherein the lid body is provided with at least a recess into which the sensor support portion is fitted.
PCT/JP2020/038141 2019-11-15 2020-10-08 Flow path switch valve WO2021095407A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-207162 2019-11-15
JP2019207162A JP7214222B2 (en) 2019-11-15 2019-11-15 Flow switching valve

Publications (1)

Publication Number Publication Date
WO2021095407A1 true WO2021095407A1 (en) 2021-05-20

Family

ID=75912617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/038141 WO2021095407A1 (en) 2019-11-15 2020-10-08 Flow path switch valve

Country Status (2)

Country Link
JP (1) JP7214222B2 (en)
WO (1) WO2021095407A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024149213A (en) * 2023-04-07 2024-10-18 株式会社デンソー Flow Channel Forming Device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10220698A (en) * 1996-12-03 1998-08-21 Nippon Aera Kk Fluid control device
JP2019148314A (en) * 2018-02-28 2019-09-05 株式会社ケーヒン Channel switching valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10220698A (en) * 1996-12-03 1998-08-21 Nippon Aera Kk Fluid control device
JP2019148314A (en) * 2018-02-28 2019-09-05 株式会社ケーヒン Channel switching valve

Also Published As

Publication number Publication date
JP7214222B2 (en) 2023-01-30
JP2021080969A (en) 2021-05-27

Similar Documents

Publication Publication Date Title
US6727613B2 (en) Motor having rotatable shaft coupled with worm shaft
CN106679296B (en) Door body assembly of refrigerator and refrigerator
JP5189063B2 (en) Rotation angle detection device and throttle control device
CN112930453B (en) Valve device and method for assembling the same
JP5823165B2 (en) Rotation detection device and motor
WO2021095407A1 (en) Flow path switch valve
JP2011244562A (en) Motor with reduction gear
EP3892900B1 (en) Flow passage switching valve and method for assembling same
JP6399935B2 (en) Motor equipment
KR102037296B1 (en) rear wheel detection device for steering angle
JP7051101B2 (en) Flow switching valve
JP4680658B2 (en) Motorized valve
CN210422285U (en) Driving device
JP7075060B2 (en) Flow switching valve
JP2005014814A (en) Steering gear
CN112648407B (en) Valve device
WO2018173549A1 (en) Steering device
WO2020235312A1 (en) Flow path switching valve
WO2020209122A1 (en) Flow passage switching valve and assembly method for same
JP5756381B2 (en) Mirror angle detector
WO2006045160A1 (en) A pivot connection
JP2015174487A (en) Driving device of vehicle side mirror

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20886808

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20886808

Country of ref document: EP

Kind code of ref document: A1