JP6577066B2 - Flow path switching valve - Google Patents

Description

The present invention relates to a flow path switching valve, for example relating to the flow path switching valve such as a three-way switching valve inhibits fluid leakage between the valve chamber and the outlet.

  Conventionally, a rotary type switching valve (rotary valve) is used to switch a flow path of a fluid flowing in, for example, an engine room of an automobile. As such a conventional switching valve, Patent Document 1 discloses a valve body having a flow path, a drive shaft connected to a rotary drive device, a valve body connected to the drive shaft, and a cylindrical shape made of an elastic material. And a communication hole that communicates with the flow path of the valve body, and includes a protrusion in the valve body and a valve seat supported by the valve body, and the valve body is accommodated in the valve seat. In this state, by rotating the drive shaft with the rotary drive device, the valve body rotates and slides on the inner peripheral surface of the valve seat to open / close or switch the flow path. .

  Further, Patent Document 2 discloses a valve body having a single through passage, a valve case having a valve chamber in which the valve body is rotatably accommodated, and a side surface of the valve chamber to hold the valve body. What is disclosed is provided with a pressing sheet that is screwed into the opening, a valve cover that closes the side opening, and a seal packing that is pressed between the side surface of the pressing sheet and the inner surface of the valve cover. ing.

JP 2012-21595 A JP 2000-18405 A

  By the way, in the butterfly valve disclosed in Patent Document 1, the valve seat disposed in the valve chamber is divided into four for each conduit connected to the valve chamber. Further, in the four-way switching valve disclosed in Patent Document 2, in order to prevent fluid leakage between the valve chamber and each outlet, contact between the ball-shaped valve body in the valve chamber, the valve case, and the presser sheet In the portion, two pairs of packings each having a spherical seat shape are disposed so as to be brought into contact with and hold the ball-shaped valve body. Therefore, in the conventional switching valve disclosed in Patent Documents 1 and 2, there may be a problem that the manufacturing cost increases due to an increase in the number of parts and the number of assembly steps.

The present invention has been made in view of the above-mentioned problems, and its object is to reliably suppress fluid leakage between the valve chamber and each outlet while reducing the number of parts and the number of assembly steps. An object of the present invention is to provide a flow path switching valve that can be used.

In order to solve the above-described problems, a flow path switching valve according to the present invention includes a rotation drive device, a valve body having a valve chamber and an outlet communicating with the valve chamber, and one or a plurality of side valves . It has a cylindrical valve body part in which a communication hole is formed, a rib projecting outward from the outer peripheral surface of the valve body part along the periphery of the communication hole is provided , and on the ceiling part of the valve body part, A valve shaft extends in the axial direction, the valve shaft is connected to the rotary drive device, and the valve body is disposed in the valve chamber, and a plurality of through holes are provided in the circumferential direction. Formed between the valve body and the valve body so that the inner peripheral surface is in contact with the rib of the valve body and the outer peripheral surface is in contact with an inner peripheral surface forming the valve chamber of the valve body. And an outer rib projecting outward from the outer peripheral surface along the periphery of the through hole, and the outer rib is elastic. A cylindrical sealing member formed of a material, and the inner peripheral surface forming the valve chamber of the valve body and the inner peripheral surface of the valve member and the outer rib are in close contact with each other, By rotating the valve body portion via the valve shaft by the rotation driving device, the valve body portion rotates and slides on the inner peripheral side of the seal member, and opens / closes or switches the outlet of the valve body. It is characterized by performing .

  In a preferred aspect, a separate rib extending outward from the outer peripheral surface of the valve body portion is provided at a position symmetrical to the center of the valve body portion of the rib.

  In a further preferred aspect, the rib and the separate rib are provided at the same interval in the circumferential direction.

  In a more preferred embodiment, a total of four ribs and separate ribs are formed in the circumferential direction.

  In a further preferred aspect, the separate rib is provided at a position where the communication hole is not formed.

  In a further preferred aspect, the rib and the separate rib have the same shape.

  In a preferred aspect, the valve body has the ceiling portion in sliding contact with the ceiling surface of the valve chamber, the lower end portion of the valve body portion is in sliding contact with the bottom surface of the valve chamber, and the rib is on the inner peripheral side of the seal member. It is arranged so as to be in sliding contact with.

  According to the present invention, the number of parts and the number of assembly steps can be reduced, and for example, when the seal member is accommodated in the valve chamber of the flow path switching valve, fluid leakage between the valve chamber and each outlet is reliably suppressed. can do.

The perspective view which shows the whole structure of Embodiment 1 of the sealing member which concerns on this invention. The perspective view which shows the whole structure of Embodiment 2 of the sealing member which concerns on this invention. The perspective view which shows the whole structure of Embodiment 3 of the sealing member which concerns on this invention. The perspective view which shows the whole structure of Embodiment 4 of the sealing member which concerns on this invention. The perspective view which shows the whole structure of Embodiment 5 of the sealing member which concerns on this invention. The longitudinal cross-sectional view which shows the basic composition of Embodiment 1 of the flow-path switching valve which concerns on this invention. The AA arrow longitudinal cross-sectional view of FIG. The longitudinal cross-sectional view which shows the basic composition of Embodiment 2 of the flow-path switching valve concerning this invention. The longitudinal cross-sectional view which shows the basic composition of Embodiment 3 of the flow-path switching valve concerning this invention. The perspective view which shows the valve body of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1 of sealing member]
FIG. 1 shows an overall configuration of Embodiment 1 of a seal member according to the present invention.

  The sealing member 1 shown in the figure mainly includes a cylindrical body 2 in which four through holes 3a to 3d are formed at the same interval (90 degree intervals) in the circumferential direction, and a cylinder along the periphery of each through hole 3a to 3d. Inner ribs 4a to 4d projecting radially inward from the inner peripheral surface 2a of the body 2, and radially outward from the outer peripheral surface 2b of the cylindrical body 2 along the peripheries of the through holes 3a to 3d. And projecting outer ribs 6a to 6d.

  The cylindrical body 2, the inner ribs 4a to 4d and the outer ribs 6a to 6d constituting the seal member 1 are integrally formed. The seal member 1 is made of, for example, nitrile rubber (NBR), hydrogenated nitrile rubber (H-NBR), silicone rubber, urethane rubber, acrylic rubber (ACM), butadiene rubber (BR), styrene butadiene rubber in addition to natural rubber. (SBR), fluorine rubber (FKM), formed from an elastic material such as synthetic rubber such as ethylene propylene rubber (EPM, EPDM), and particularly preferably formed from ethylene propylene rubber (EPM, EPDM).

  Although the cylindrical body 2, the inner ribs 4a to 4d, and the outer ribs 6a to 6d may be formed separately, for example, when the seal member 1 is incorporated in the flow path switching valve, the valve chamber and each outlet port The inner ribs 4a to 4d and the outer ribs 6a to 6d are preferably formed of an elastic material in order to reliably suppress fluid leakage between the inner ribs 4a to 4d and the outer ribs 6a to 6d. On the other hand, the cylindrical body 2 is harder than the elastic material forming the inner ribs 4a to 4d and the outer ribs 6a to 6d in order to suppress the deformation of the seal member 1 accompanying the rotational drive of the valve body in the valve chamber. You may form from a highly elastic material or resin materials other than an elastic material.

  In addition, four upper projections 5a to 5d project from the upper surface of the cylindrical member 2 of the seal member 1 toward the upper side in the axial center L direction. Further, four lower protrusions 7a to 7d project from the lower surface of the cylindrical body 2 in the axial center direction toward the lower side in the axial center L direction. The upper protrusions 5a to 5d and the lower protrusions 7a to 7d each have a convex shape, and are located at the same position in the circumferential direction as the center of the through holes 3a to 3d of the cylindrical body 2, that is, at the same interval in the circumferential direction (90 degree intervals). Is provided.

  In the first embodiment, the height of the upper projections 5a to 5d in the axial center L direction is higher than the height of the lower projections 7a to 7d in the axial center L direction. Even if the height in the axis L direction of 5d and the height in the axis L direction of the lower projections 7a to 7d are formed the same, the seal member 1 may be formed point-symmetrically with respect to the center of the cylindrical body 2. Good.

  In the sealing member 1 of the first embodiment described above, the cylindrical body 2 in which a plurality of through holes 3a to 3d are formed in the circumferential direction, the inner peripheral surface 2a of the cylindrical body 2 along the circumference of each through hole 3a to 3d, and When the seal member 1 is formed from the inner ribs 4a to 4d and the outer ribs 6a to 6d projecting inward and outward from the outer peripheral surface 2b, for example, when the seal member 1 is assembled to the flow path switching valve. The number of assembling steps for the seal member 1 can be reduced. Further, the inner ribs 4a to 4d and the outer ribs 6a to 6d are formed of an elastic material, so that, for example, the fluid between the valve chamber and each outlet when the seal member 1 is incorporated into the flow path switching valve. Can be reliably suppressed. Further, since the cylindrical body 2, the inner ribs 4a to 4d, and the outer ribs 6a to 6d are integrally formed, the number of parts and the number of manufacturing steps of the seal member 1 can be reduced. Further, the through-holes 3a to 3d having the same shape, the inner ribs 4a to 4d, and the outer ribs 6a to 6d of the cylindrical body 2 are formed at the same interval in the circumferential direction. In this case, fluid leakage between the valve chamber and each outlet can be suppressed evenly and reliably in the circumferential direction.

  In addition, the upper projections 5a to 5d and the lower projections 7a to 7d are provided at the end in the axial direction of the cylindrical body 2 constituting the seal member 1 so as to project in the axial L direction. Can be prevented from rotating in the valve chamber of the seal member 1 due to the rotational drive of the valve body when it is incorporated into the flow path switching valve. Further, the upper projections 5a to 5d and the lower projections 7a to 7d are provided at the same positions as the through holes 3a to 3d of the cylindrical body 2 in the circumferential direction, so that the cylinder at the position where the through holes 3a to 3d are formed. The longitudinal cross-sectional area of the body 2 can be increased, and the decrease in rigidity of the seal member 1 due to the through holes 3a to 3d can be effectively suppressed.

[Embodiment 2 of sealing member]
FIG. 2 shows the overall configuration of Embodiment 2 of the seal member according to the present invention. The seal member 1A of the second embodiment shown in FIG. 2 is different from the seal member 1 of the first embodiment shown in FIG. 1 in the configuration of the protrusions protruding from the axial direction end of the cylindrical body. The configuration is the same as that of the seal member 1 shown in FIG. Therefore, about the structure similar to the sealing member 1 of Embodiment 1 shown in FIG. 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  Four upper projections 5aA to 5dA project outwardly in the radial direction from the upper end in the axial direction of the cylindrical body 2A constituting the seal member 1A. Further, four lower projections 7aA to 7dA (the lower projection 7cA is not shown) project from the lower end in the axial direction of the cylindrical body 2A toward the radially outer side. The upper protrusions 5aA to 5dA each have a plate shape extending downward in the axial direction from the upper surface of the cylindrical body 2A, and the lower protrusions 7aA to 7dA each have a plate shape extending upward in the axial direction from the lower surface of the cylindrical body 2A. The upper projections 5aA to 5dA and the lower projections 7aA to 7dA are provided at the same interval (90 ° interval) in the circumferential direction and at the same position. Further, the upper projections 5aA to 5dA and the lower projections 7aA to 7dA are adjacent to the through holes 3aA to 3dA of the cylindrical body 2A in different positions in the circumferential direction, that is, adjacent to the cylindrical body 2A when viewed in the direction of the axial center LA. It is provided between the through holes 3aA to 3dA.

  Here, the upper protrusions 5aA to 5dA and the lower protrusions 7aA to 7dA are the length in the axis LA direction, the width in the circumferential direction, and the length in the radial direction (the amount of protrusion from the outer peripheral surface 2bA of the cylindrical body 2A). ) Are formed identically, and the seal member 1A is formed point-symmetrically with respect to the center of the cylindrical body 2A. Further, the radial heights of the upper protrusions 5aA to 5dA and the lower protrusions 7aA to 7dA are in the radial direction of the outer ribs 6aA to 6dA provided along the peripheries of the through holes 3aA to 3dA of the cylindrical body 2A. It is formed higher than the height.

  In the sealing member 1A of the second embodiment described above, the upper protrusions 5aA to 5dA and the lower protrusions 7aA to 7dA are formed so as to protrude outward in the radial direction. The seal member 1A can be prevented from rotating in the valve chamber due to the rotational drive of the valve body, and the height of the seal member 1A in the direction of the axis LA is reduced, thereby reducing the size of the seal member 1A. Can be Further, the upper protrusions 5aA to 5dA and the lower protrusions 7aA to 7dA are provided between the through holes 3aA to 3dA formed in the cylindrical body 2A when viewed in the axial center LA direction, so that the upper protrusions 5aA to 5dA. In addition, the length of the lower projections 7aA to 7dA in the direction of the axis LA can be secured, and the strength of the upper projections 5aA to 5dA, the lower projections 7aA to 7dA, and the cylindrical body 2A can be secured. Furthermore, since the sealing member 1A is formed point-symmetrically with respect to the center of the cylindrical body 2A, for example, the sealing member can be assembled to the flow path switching valve in an upside down orientation, and the generation of defective products can be suppressed. The assembly process can be simplified.

[Embodiment 3 of seal member]
FIG. 3 shows the overall configuration of Embodiment 3 of the seal member according to the present invention. The seal member 1B of the third embodiment shown in FIG. 3 is different from the seal member 1 of the first embodiment shown in FIG. 1 in that a concave depression is formed instead of a protrusion at the upper end in the axial direction of the cylindrical body. The other configuration is the same as that of the seal member 1 shown in FIG. Therefore, about the structure similar to the sealing member 1 of Embodiment 1 shown in FIG. 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  At the upper end in the axial direction of the cylindrical body 2B constituting the seal member 1B, four upper recesses 5aB to 5dB are formed from the upper surface toward the lower side in the axial center LB direction. Further, four lower protrusions 7aB to 7dB project from the lower surface of the cylindrical body 2B in the axial direction toward the lower side in the axial center LB direction. The upper depressions 5aB to 5dB each have a concave shape, the lower projections 7aB to 7dB each have a convex shape, and the upper depressions 5aB to 5dB and the lower projections 7aB to 7dB are the centers of the through holes 3aB to 3dB of the cylindrical body 2B, respectively. And the same position in the circumferential direction, that is, at the same interval in the circumferential direction (interval of 90 degrees). That is, the upper depressions 5aB to 5dB and the lower projections 7aB to 7dB are provided at the same interval (90 degree interval) and at the same position in the circumferential direction.

  In the sealing member 1B of the third embodiment described above, the upper depressions 5aB to 5dB are formed at the upper end in the axial direction of the cylindrical body 2B constituting the sealing member 1B, and the lower protrusions 7aB to 7dB are formed at the lower end in the axial direction. By projecting in the direction of the axis LB, for example, when the seal member 1B is incorporated in the flow path switching valve, rotation of the seal member 1B in the valve chamber accompanying the rotational drive of the valve body can be suppressed. The seal member 1B can be reduced in size by suppressing an increase in the height of the seal member 1B in the axis LB direction.

  In Embodiment 3 described above, the concave dent is formed only at the upper end in the axial direction of the cylindrical body 2B. For example, a concave dent may be formed at the lower end in the axial direction of the cylindrical body 2B. You may form a concave hollow in both the axial direction upper end part and lower end part of the cylindrical body 2B.

[Embodiment 4 of Sealing Member]
FIG. 4 shows the overall configuration of Embodiment 4 of the seal member 1C according to the present invention. The seal member 1C of the fourth embodiment shown in FIG. 4 is different from the seal member 1 of the first embodiment shown in FIG. 1 in that the inner rib on the inner peripheral surface of the cylindrical body is omitted. It is the same as the sealing member 1 shown in FIG. Therefore, about the structure similar to the sealing member 1 of Embodiment 1 shown in FIG. 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  The sealing member 1C shown in the figure mainly includes a cylindrical body 2C in which four through holes 3aC to 3dC are formed at the same interval (90 degree intervals) in the circumferential direction, and a cylinder along the periphery of each through hole 3aC to 3dC. The outer ribs 6aC to 6dC are provided so as to project radially outward from the outer peripheral surface 2bC of the body 2C. The cylindrical body 2C constituting the seal member 1C and the outer ribs 6aC to 6dC are integrally formed.

  In addition, four upper projections 5aC to 5dC project from the upper surface of the cylindrical member 2C of the seal member 1C in the axial direction toward the upper side in the axial center LC direction. In addition, four lower protrusions 7aC to 7dC protrude from the lower surface of the cylindrical body 2C in the axial direction toward the lower side in the axial center LC direction. The upper protrusions 5aC to 5dC and the lower protrusions 7aC to 7dC each have a convex shape, and the center of the through hole 3aC to 3dC of the cylindrical body 2C and the same position in the circumferential direction, that is, the same interval in the circumferential direction (90 degree interval). Is provided.

  In the sealing member 1C of the fourth embodiment described above, by omitting the inner rib on the inner peripheral surface 2aC side of the cylindrical body 2C, the shape of the sealing member 1C can be simplified, and molding when the sealing member 1C is molded is performed. The process can be greatly simplified, and an increase in the manufacturing cost of the seal member 1C can be suppressed.

[Embodiment 5 of Sealing Member]
FIG. 5 shows an overall configuration of Embodiment 5 of the seal member 1D according to the present invention. The seal member 1D of the fifth embodiment shown in FIG. 5 is different from the seal member 1B of the third embodiment shown in FIG. 3 in the configuration in which the inner rib on the inner peripheral surface of the cylindrical body is omitted. This is the same as the sealing member 1B shown in FIG. Therefore, about the structure similar to the sealing member 1B of Embodiment 3 shown in FIG. 3, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  In the seal member 1D of the fifth embodiment, as with the seal member 1C of the fourth embodiment, by omitting the inner rib on the inner peripheral surface 2aD side of the cylindrical body 2D, the shape of the seal member 1D can be simplified and the seal The molding process for molding the member 1D can be greatly simplified, and an increase in the manufacturing cost of the seal member 1D can be suppressed. Further, the upper recess 5aD to 5dD is formed at the upper end in the axial direction of the cylindrical body 2D, and the inner rib on the inner peripheral surface 2aD side of the cylindrical body 2D is omitted, thereby reducing the size and weight of the sealing member 1D. can do.

[Embodiment 1 of flow path switching valve]
Next, an embodiment of a flow path switching valve in which the seal member 1 of Embodiment 1 described above is incorporated will be described with reference to FIGS. The illustrated flow path switching valve 10 is used as a multi-way switching valve that switches a flow path of a fluid flowing in, for example, an engine room of an automobile in multiple directions.

  The flow path switching valve 10 shown is mainly composed of a resin valve body 12 having a valve chamber 11, a motor (rotary drive device) 13 disposed above the valve body 12, and the valve chamber 11 of the valve body 12. A resin valve body comprising a seal member 1 as a valve seat disposed inside, a valve shaft 14a connected to the output shaft of the motor 13, and a valve body portion 14b accommodated in a region surrounded by the seal member 1. 14.

  The valve main body 12 has a stepped cylindrical base body 12a and a cover 12b, and a valve chamber 11 is defined inside the large diameter portion 12c of the cylindrical base body 12a. In addition, two lateral outlets 11a and 11b that open to the valve chamber 11 are formed at intervals of 90 degrees on the side of the large diameter portion 12c, and the outlet passage 15a communicates with the respective outlets 11a and 11b. , 15b, conduit joints 16a, 16b are integrally formed (see FIG. 7). A vertical opening 12e that opens into the valve chamber 11 is formed at the bottom of the large diameter portion 12c, and a step is formed on the inner peripheral surface of the opening 12e. Further, inside the small-diameter portion 12d of the cylindrical base body 12a, a storage chamber 17 that communicates with the valve chamber 11 and extends in the direction of the axis L having a smaller diameter than the valve chamber 11 is defined.

The cover 12b of the valve body 12 has a fitting portion 12f having an outer diameter substantially equal to the opening 12e of the large-diameter portion 12c of the cylindrical base 12a, and the outer peripheral surface of the fitting portion 12f is an opening of the large-diameter portion 12c. It has a shape complementary to the inner peripheral surface of 12e. The fitting portion 12f of the cover 12b is fitted into the opening 12e of the large-diameter portion 12c of the cylindrical base 12a, and the cylindrical base 12a is in a posture in which the inner peripheral surface of the opening 12e and the outer peripheral surface of the fitting portion 12f are in contact with each other. and the cover 12b is by being fixed is welded by ultrasonic welding or the like, the valve chamber 11 in the cylindrical body 12a and a cover 12b is defined. A vertical inflow port 11c that opens to the valve chamber 11 is formed substantially at the center of the fitting portion 12f, and a conduit joint 16c having an inflow passage 15c that communicates with the inflow port 11c is integrally formed. ing.

  Four recesses 19a to 19d are formed on the inner peripheral surface of the valve body 12 slightly inward from the outer edge of the ceiling surface 18 forming the valve chamber 11 toward the upper side in the axial center L direction. The recesses 19a to 19d are provided at the same interval (90 degree interval) in the circumferential direction, and two of these recesses 19a to 19d (recesses 19a and 19b) are outlets formed on the side of the large diameter portion 12c. 11a and 11b are arranged at the same position in the circumferential direction.

  The seal member 1 has a valve chamber 11 of the valve body 12 such that the upper protrusions 5a to 5d are fitted in the recesses 19a to 19d, and the lower protrusions 7a to 7d are in contact with the upper surface of the fitting part 12f of the cover 12b. Housed inside. Thereby, the adjacent through holes 3a and 3b of the seal member 1 and the outlets 11a and 11b of the large diameter portion 12c of the cylindrical base 12a are positioned at substantially the same position, and the valve chamber 11 of the valve body 12 and the conduit joint 16a are positioned. , 16b are communicated with each other through the through holes 3a, 3b of the cylindrical body 2 of the seal member 1 and the outlets 11a, 11b. The dimensions of the upper surfaces of the recesses 19a to 19d and the upper surface of the fitting portion 12f of the cover 12b are set so as to substantially match the dimensions of the upper surfaces of the upper protrusions 5a to 5d of the seal member 1 and the lower surface of the cylindrical body 2. The dimensions of the ceiling surface 18 and the upper surface of the fitting portion 12f of the cover 12b are set so as to substantially match the vertical height of the cylindrical body 2 of the seal member 1. Thereby, the seal member 1 is accommodated in the valve chamber 11 in a state compressed in the direction of the axis L, and the lower projections 7a to 7d of the seal member 1 are pressed against the upper surface of the fitting portion 12f of the cover 12b. The rotation of the seal member 1 accompanying the rotational drive of the valve body portion 14b in the valve chamber 11 is pressed against the upper projections 5a to 5d fitted in the recesses 19a to 19d and the upper surface of the fitting portion 12f. It is restrained by both of the lower projections 7a to 7d.

  In the valve body 14, the upper surface of the ceiling portion of the cylindrical valve body portion 14b is in sliding contact with the ceiling surface 18, the lower surface of the lower end portion is in sliding contact with the upper surface of the fitting portion 12f of the cover 12b, and the outer periphery of the cylindrical side portion It arrange | positions so that a surface may slidably contact with the inner peripheral side of the inner side ribs 4a-4d of the sealing member 1. FIG. Two lateral communication holes 21a and 21b are formed at intervals of 90 degrees on the side of the valve body 14b of the valve body 14. Moreover, the valve shaft 14a is integrally extended toward the upper side of the axial center L direction in the approximate center of the ceiling part of the valve body part 14b. The valve shaft 14a is rotatably slidably disposed in the accommodating chamber 17 of the small-diameter portion 12d of the cylindrical base 12a, and the valve shaft 14a is formed with two annular grooves 22a and 22b in the axial center L direction. The O-rings 23a and 23b are attached to the annular grooves 22a and 22b, respectively, so that the fluid in the valve chamber 11 does not leak to the motor 13 disposed above.

  The valve body portion 14b of the valve body 14 is rotationally driven around the axis L according to the rotational drive of the motor 13 through the valve shaft 14a connected to the output shaft of the motor 13, and the lateral communication holes 21a and 21b are provided. The through holes 3a and 3b of the cylindrical body 2 of the seal member 1 and the outlets 11a and 11b of the cylindrical base body 12a of the valve body 12 are selectively communicated with the outflow paths 15a and 15b of the conduit joints 16a and 16b. The lower opening 21c of the valve body portion 14b of the valve body 14 is always in communication with the inflow path 15c of the conduit joint 16c via the inflow port 11c of the cover 12b of the valve body 12.

  Here, a distance D (see FIG. 7) between the outer peripheral surface of the side of the valve body 14b of the valve body 14 and the inner peripheral surface of the large-diameter portion 12c of the cylindrical base body 12a is the same as that of the seal member 1 shown in FIG. The inner ribs 4 a to 4 d are designed to be smaller than the tops of the outer ribs 6 a to 6 d and larger than the radial thickness of the cylindrical body 2 of the seal member 1. Accordingly, the inner ribs 4a to 4d and the outer ribs 6a to 6d are compressed by the outer peripheral surface of the side portion of the valve body portion 14b of the valve body 14 and the inner peripheral surface of the large diameter portion 12c of the cylindrical base body 12a. In addition, the sealing member 1 has a posture in which the cylindrical body 2 is separated from the outer peripheral surface of the side portion of the valve body portion 14b of the valve body 14 and the inner peripheral surface of the large diameter portion 12c of the cylindrical base body 12a. It is interposed between the side part of the valve body part 14b and the large diameter part 12c of the cylindrical base 12a. Therefore, the valve body 14b of the valve body 14 accommodated in the region surrounded by the seal member 1 so as to be slidable and slidable can be smoothly driven to rotate in the valve chamber 11, and the valve body 14b side of the valve body 14 can be driven. The outer peripheral surface of the seal member 1 and the inner ribs 4a to 4d of the seal member 1 and the inner peripheral surface of the large-diameter portion 12c of the cylindrical base 12a and the outer ribs 6a to 6d of the seal member 1 are in close contact with each other. It is possible to reliably suppress fluid leakage during

  The flow of fluid such as hot water and cold water in the above-described flow path switching valve 10 will be outlined. For example, in the state shown in FIG. 7, the fluid that has flowed in from the inflow passage 15c of the conduit joint 16c of the cover 12b of the valve body 12 is introduced into the valve chamber 11 through the inflow port 11c and the lower opening 21c of the valve body portion 14b. The pipe joint 16a is formed through the communication holes 21a and 21b on the side of the valve body 14b, the through holes 3a and 3b of the cylindrical body 2 of the seal member 1, and the outlets 11a and 11b of the cylindrical base 12a of the valve body 12. , 16b are led to both outflow passages 15a, 15b.

When the valve body 14 is rotated by 90 degrees clockwise, for example, from the state shown in FIG. 7 through the valve shaft 14 a by driving the motor 13, the communication hole 21 a on the side of the valve body portion 14 b becomes the cylindrical body of the seal member 1. The valve body portion 14b slides on the inner peripheral side of the inner ribs 4a to 4d of the seal member 1 until it reaches substantially the same position as the through hole 3b of the second cylindrical body 12a and the outlet 11b of the cylindrical base body 12a of the valve body 12. It is rotated. In this state, the fluid that has flowed in from the inflow passage 15c of the conduit joint 16c of the cover 12b of the valve body 12 is introduced into the valve chamber 11 via the inflow port 11c and the lower opening 21c of the valve body portion 14b. communication holes 21 a and 14b of the side, are directed only to the outlet channel 15b of the conduit fitting 16b through the outlet 11b of the cylindrical substrate 12a of penetration of the cylindrical body 2 of the sealing member 1 hole 3b and the valve body 12.

On the other hand, when the valve body 14 is rotated by 90 degrees counterclockwise from the state shown in FIG. 7, for example, through the valve shaft 14a by driving the motor 13, the communication hole 21b on the side of the valve body section 14b becomes the seal member 1. The valve body portion 14b slides on the inner peripheral side of the inner ribs 4a to 4d of the seal member 1 until it reaches substantially the same position as the through hole 3a of the cylindrical body 2 and the outlet 11a of the cylindrical base body 12a of the valve body 12. It is rotated while moving. In this state, the fluid that has flowed in from the inflow passage 15c of the conduit joint 16c of the cover 12b of the valve body 12 is introduced into the valve chamber 11 via the inflow port 11c and the lower opening 21c of the valve body portion 14b. communication holes 21 b and 14b of the side, are directed only to the outflow passage 15a of the conduit fitting 16a through the outlet port 11a of the cylindrical substrate 12a of penetration of the cylindrical body 2 of the sealing member 1 hole 3a and the valve body 12.

  As described above, in the flow path switching valve 10 according to the first embodiment, the inflow path of the conduit joint 16 c of the cover 12 b of the valve body 12 is rotated by rotating the valve body portion 14 b of the valve body 14 to an appropriate position by driving the motor 13. The fluid flowing in from 15c can be smoothly and reliably switched to the appropriate conduit joint outlet.

In addition, it is natural that it can replace with the sealing member 1 of Embodiment 1, and the sealing member 1A of Embodiment 2 can be integrated in a flow-path switching valve. In that case, the cylindrical body of the seal member 1A is disposed on the upper end side or the lower end side of the radially inner peripheral surface of the inner peripheral surface of the large-diameter portion 12c of the cylindrical base body 12a of the valve body 12 forming the valve chamber 11. What is necessary is just to form the recessed part by which upper side protrusion 5aA-5dA and lower side protrusion 7aA-7dA provided in the axial direction upper end part and lower end part of 2A are fitted.

[Embodiment 2 of flow path switching valve]
Next, an embodiment of the flow path switching valve in which the sealing member 1B of the above-described Embodiment 3 is incorporated will be described with reference to FIG.

  The flow path switching valve 10B of the second embodiment shown in FIG. 8 is mainly different from the flow path switching valve 10 of the first embodiment shown in FIG. 6 mainly in the valve chamber 11B on the inner peripheral surface of the seal member 1B and the valve main body 12B. The structure of the ceiling surface 18B to be formed is different, and the other structure is the same as that of the flow path switching valve 10 shown in FIG. Therefore, the same reference numerals are given to the same configurations as those of the flow path switching valve 10 of Embodiment 1 shown in FIG. 6, and the detailed description thereof is omitted.

  In the flow path switching valve 10B of the second embodiment, four convex portions 19aB to 19dB are formed on the ceiling surface 18B that forms the valve chamber 11B on the inner peripheral surface of the valve body 12B toward the lower side in the axial center LB direction. Has been. The convex portions 19aB to 19dB are provided at the same interval (90 degree intervals) in the circumferential direction, and two of the convex portions 19aB to 19dB (the convex portions 19aB and 19bB) are formed on the side portion of the large-diameter portion 12cB. The outlets 11aB and 11bB are arranged at the same position in the circumferential direction.

  The seal member 1B has a valve chamber of the valve body 12B such that the convex portions 19aB to 19dB are fitted in the upper depressions 5aB to 5dB, respectively, and the lower projections 7aB to 7dB are in contact with the upper surface of the fitting portion 12fB of the cover 12bB. 11B.

  Thereby, like the flow-path switching valve 10 of Embodiment 1 mentioned above, the adjacent through-holes 3aB and 3bB of the seal member 1B and the outlets 11aB and 11bB of the large-diameter portion 12cB of the cylindrical base body 12aB are at substantially the same position. The valve chamber 11B of the valve body 12B and the outflow passages 15aB and 15bB of the conduit joints 16aB and 16bB are communicated with each other through the through holes 3aB and 3bB and the outflow ports 11aB and 11bB of the cylindrical body 2B of the seal member 1B. Further, the rotation of the sealing member 1B accompanying the rotational drive of the valve body part 14bB in the valve chamber 11B presses the upper surface of the upper depressions 5aB to 5dB and the fitting part 12fB into which the convex parts 19aB to 19dB are fitted. The lower projections 7aB to 7dB are restrained.

[Embodiment 3 of the flow path switching valve]
Next, an embodiment of a flow path switching valve in which the seal member 1C of Embodiment 4 described above is incorporated will be described with reference to FIGS.

  The flow path switching valve 10C of the third embodiment shown in FIG. 9 differs from the flow path switching valve 10 of the first embodiment shown in FIG. 6 mainly in the configuration of the seal member 1C and the valve body 14C. The configuration is the same as that of the flow path switching valve 10 shown in FIG. Therefore, the same reference numerals are given to the same configurations as those of the flow path switching valve 10 of Embodiment 1 shown in FIG. 6, and the detailed description thereof is omitted.

  In the flow path switching valve 10C of the third embodiment, ribs 25aC and 25bC extending outward from the outer peripheral surface along the periphery of the lateral communication holes 21aC and 21bC formed in the side portion of the valve body portion 14bC of the valve body 14C are provided. While projecting, ribs 25cC and 25dC projecting outward from the outer peripheral surface are projected at positions symmetrical to the center of the valve body part 14bC. That is, as shown in FIG. 10, four substantially circular ribs 25aC to 25dC are projected from the outer peripheral surface of the side portion of the valve body portion 14bC of the valve body 14C at equal intervals (90 degree intervals) in the circumferential direction. Has been.

  As shown in FIG. 10, the valve body 14C has a top surface of the valve body portion 14bC that is in sliding contact with the ceiling surface 18C, a bottom surface of the lower end portion is in sliding contact with the top surface of the fitting portion 12fC of the cover 12bC, Ribs 25aC to 25dC provided on the outer peripheral surface are arranged so as to be in sliding contact with the inner peripheral side of the sealing member 1C.

  The valve body portion 14bC of the valve body 14C is rotationally driven around the axis LC according to the rotational drive of the motor 13C via the valve shaft 14aC connected to the output shaft of the motor 13C, and the lateral communication holes 21aC and 21bC are formed. The through holes 3aC and 3bC of the cylindrical body 2C of the seal member 1C and the outlets 11aC and 11bC of the cylindrical base body 12aC of the valve body 12C are selectively communicated with the outflow passages 15aC and 15bC of the conduit joints 16aC and 16bC.

  Here, the interval between the tops of the ribs 25aC to 25dC provided on the outer peripheral surface of the side of the valve body 14bC of the valve body 14C and the inner peripheral surface of the large-diameter portion 12cC of the cylindrical base 12aC is the same as that of the seal member 1C. The cylindrical body 2C is designed to be smaller than the dimensions of the inner peripheral surface 2aC and the tops of the outer ribs 6aC to 6dC and larger than the radial thickness of the cylindrical body 2C of the seal member 1C. Thereby, the cylindrical body 2C of the seal member 1C and the outer ribs 6aC to 6dC are arranged inside the ribs 25aC to 25dC provided on the side of the valve body portion 14bC of the valve body 14C and the large-diameter portion 12cC of the cylindrical base body 12aC. In a posture compressed with the peripheral surface, and in a posture in which the cylindrical body 2C is separated from the outer peripheral surface of the side portion of the valve body portion 14bC of the valve body 14C and the inner peripheral surface of the large-diameter portion 12cC of the cylindrical base body 12aC, A seal member 1C is disposed between the side of the valve body 14bC of the valve body 14C and the large-diameter portion 12cC of the cylindrical base 12aC.

  Therefore, similarly to the flow path switching valve 10 of the first embodiment described above, the valve body portion 14bC of the valve body 14C accommodated in the region surrounded by the seal member 1C so as to be slidable and slidable is smoothly rotated in the valve chamber 11C. The ribs 25aC to 25dC provided on the outer peripheral surface of the valve body portion 14bC of the valve body 14C, the inner peripheral surface 2aC of the cylindrical body 2C of the seal member 1C, and the large-diameter portion 12cC of the cylindrical base body 12aC can be driven. Even when the inner circumferential surface and the outer ribs 6aC to 6dC of the seal member 1C are in close contact with each other and the seal member 1C without the inner rib is used, the sliding resistance between the valve body 14C and the valve body 12C is reduced. In addition, fluid leakage can be reliably suppressed.

  Of course, the seal member 1D of the fifth embodiment can be incorporated into the flow path switching valve in place of the seal member 1C of the fourth embodiment. In that case, a convex portion that fits into the upper recesses 5aD to 5dD formed at the upper end in the axial direction of the seal member 1D on the ceiling surface 18C that forms the valve chamber 11C in the inner peripheral surface of the valve body 12C. May be formed.

  In the sealing members 1 to 1D of the first to fifth embodiments described above, protrusions and depressions are provided on both the upper end and the lower end in the axial direction of the cylindrical body. As long as the rotation of the member can be prevented, a protrusion or a depression may be provided on only one of the upper end and the lower end in the axial direction of the cylindrical body.

  Moreover, in the flow path switching valve of Embodiments 1 to 3 described above, a recess in which the upper protrusion of the seal member is fitted only on the ceiling surface forming the valve chamber in order to simplify the assembly process of the flow path switching valve. In order to more effectively suppress the rotation of the sealing member due to the rotation of the valve body, for example, a lower protrusion is formed on the upper surface of the fitting portion of the cover. You may form the recessed part etc. which are fitted.

  The above-described seal members 1 to 1D of Embodiments 1 to 5 can be employed as a fluid seal member in various devices in addition to a flow path switching valve that switches a flow path of a fluid flowing in an automobile engine room or the like. .

  The shape and number of through-holes formed in the cylindrical body of the seal member, the shape and number of protrusions and depressions formed at the axial end of the cylindrical body, etc. Of course, it can be changed as appropriate according to the number of motors, the driving force of the motor for switching the flow path, the rotational speed, and the like.

DESCRIPTION OF SYMBOLS 1 Seal member 2 Cylindrical body 2a Cylindrical inner peripheral surface 2b Cylindrical outer peripheral surface 3a-3d Through-hole 4a-4d Inner rib 5a-5d Upper protrusion 6a-6d Outer rib 7a-7d Lower protrusion 10 Flow path switching valve DESCRIPTION OF SYMBOLS 11 Valve chamber 11a, 11b Outlet 11c Inlet 12 Valve main body 12a Cylindrical base | substrate 12b Cover 12c Large diameter part 12d of cylindrical base | substrate Small diameter part 12e of cylindrical base | substrate 12f Opening 12f of large diameter part of cylindrical base | substrate 12 Fitting part 13 Motor (rotary drive device)
14 Valve body 14a Valve shaft 14b Valve body portions 15a, 15b Outflow passage 15c Inflow passages 16a, 16b, 16c Conduit joint 17 Storage chamber 18 Ceiling surfaces 19a-19d Recesses 21a, 21b Communication hole 21c Lower opening

Claims (7)

A rotary drive device;
A valve body having a valve chamber and an outlet communicating with the valve chamber;
It has a cylindrical valve body part in which one or a plurality of communication holes are formed on the side part, and ribs extending outward from the outer peripheral surface of the valve body part are provided along the periphery of the communication hole , A valve body having a valve shaft extending in an axial direction on a ceiling portion of the valve body portion, the valve shaft being connected to the rotation driving device, and the valve body portion being disposed in the valve chamber; ,
A plurality of through holes are formed in the circumferential direction, an inner peripheral surface is in contact with the rib of the valve body, and an outer peripheral surface is in contact with an inner peripheral surface forming the valve chamber of the valve body. A cylindrical shape that is disposed between the valve main body and has an outer rib projecting outward from an outer peripheral surface along the periphery of the through hole, and the outer rib is formed of an elastic material. A flow path switching valve comprising:
The outer peripheral rib and the inner peripheral surface forming the valve chamber of the valve body and the inner peripheral surface of the seal member are in close contact with each other,
By rotating the valve body portion via the valve shaft by the rotation driving device, the valve body portion rotates and slides on the inner peripheral side of the seal member, and opens / closes or switches the outlet of the valve body. channel switching valve, characterized in that to perform. 2. The flow path switching according to claim 1, wherein a separate rib is provided projecting outward from the outer peripheral surface of the valve body portion at a position symmetrical to the center of the valve body portion of the rib. Valve . The flow path switching valve according to claim 2, wherein the rib and the separate rib are provided at the same interval in the circumferential direction. 4. The flow path switching valve according to claim 2, wherein a total of four of the ribs and the separate ribs are formed in a circumferential direction. The flow path switching valve according to any one of claims 2 to 4, wherein the additional rib is provided at a position where the communication hole is not formed. 6. The flow path switching valve according to claim 2, wherein the rib and the separate rib have the same shape. The valve body is configured such that the ceiling portion is in sliding contact with the ceiling surface of the valve chamber, the lower end portion of the valve body portion is in sliding contact with the bottom surface of the valve chamber, and the rib is in sliding contact with the inner peripheral side of the seal member. The flow path switching valve according to any one of claims 1 to 6, wherein the flow path switching valve is arranged in a vertical direction.

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