JP6632932B2 - Flow control valve - Google Patents

Description

  The present invention relates to a flow control valve for controlling a flow rate of a flow path.

  A cylindrical valve housing, a columnar valve body (needle valve body) that adjusts the degree of opening of the flow path by moving in the axial direction of the valve housing, an operating member that rotates integrally with the valve body, and a valve body For example, Patent Document 1 discloses a flow control valve including a display ring having a display unit that indicates the number of rotations. The valve housing includes a cylindrical flow path forming member having a flow path formed therein, and a cylindrical cover member that is assembled to the flow path forming member in an axial direction of the valve housing and houses a display ring. I have. The cover member has a display window that exposes the display unit to the outside. The valve body is inserted through the cover member and the flow path forming member. Then, by operating the operation member to move the valve body in the axial direction of the valve housing, the opening degree of the flow path is adjusted, and the flow rate of the flow path is controlled. In this flow control valve, the display unit faces the outside from the display window, and the opening degree of the flow path is counted based on the rotation speed of the valve body indicated by the display unit. Thereby, the degree of opening of the flow path can be grasped.

Japanese Patent No. 5350941

  By the way, if the cover member and the flow path forming member are not assembled to each other in a state where the cover member is positioned with respect to the flow path forming member in the rotation direction of the operation member, the force in the rotation direction of the operation member is applied to the cover member. When the cover member acts, the cover member rotates with respect to the flow path forming member. In addition, if the cover member and the flow path forming member are not assembled with each other in a state where the cover member is positioned with respect to the flow path forming member in the axial direction of the valve housing, the cover member flows in the axial direction of the valve housing. When a force is applied to the path forming member in the direction of separating, the cover member separates from the flow path forming member and comes off the flow path forming member. Furthermore, if the flow path forming member and the cover member are not assembled with each other so that the central axes of the flow path forming member and the cover member coincide with each other, it becomes difficult for the valve body to move in the axial direction of the valve housing. .

  An object of the present invention is to secure the positioning of the operation member with respect to the flow path forming member in the cover member in the rotation direction and the axial direction of the valve housing, while the center axes of the flow path forming member and the cover member match each other. Accordingly, it is an object of the present invention to provide a flow control valve capable of assembling a flow path forming member and a cover member.

  A flow control valve for solving the above-mentioned problems is a cylindrical valve housing, a columnar valve body that adjusts an opening degree of a flow path by moving in an axial direction of the valve housing, and rotates integrally with the valve body. Operating member, wherein the valve housing is formed of a metal-made cylindrical flow path forming member having the flow path formed therein, and a resin that is assembled in the axial direction to the flow path forming member. A flow path forming member having a cylindrical insertion portion that is inserted inside the cover member, and the insertion portion is formed on an outer peripheral surface of the insertion portion. A concave and convex portion having a convex portion and a concave portion arranged in the circumferential direction of the insertion portion, a groove portion formed on the outer peripheral surface of the insertion portion, and recessed from the outer surface of the top of the convex portion, An imaginary circle centered on the central axis of the member, An outer peripheral surface located on the virtual circle passing through a radially outermost part of the insertion portion of the insertion portion, or a cylindrical portion having an outer peripheral surface located on the radial direction outside of the virtual circle. The cover member includes a press-fitted portion press-fitted into the concave-convex portion, a locked portion locked in the groove portion, and a contact portion continuously contacting the outer peripheral surface of the cylindrical portion in the circumferential direction. And

In the flow control valve, it is preferable that the uneven portion has a plurality of the convex portions and the concave portions, and an outer surface of a top portion of the plurality of convex portions is located on the virtual circle.
In the flow control valve, the groove preferably extends continuously over the entire circumference in the circumferential direction.

  According to the present invention, the center axes of the flow path forming member and the cover member coincide with each other while ensuring the rotational direction of the operation member with respect to the flow path forming member and the axial positioning of the valve housing in the cover member. Thus, the flow path forming member and the cover member can be assembled.

(A) And (b) is a perspective view which shows the flow control valve in embodiment. FIG. 3 is a longitudinal sectional view of a flow control valve. FIG. 4 is a longitudinal sectional view in which a part of the flow control valve is enlarged. FIG. 3 is an exploded perspective view of the flow control valve. FIG. 3 is a cross-sectional perspective view in which a part of the flow control valve is broken. Sectional drawing which fractured | ruptured a part of flow control valve. FIG. 3 is a perspective view of an operation member. FIG. 3 is a longitudinal sectional view in which a part of a flow control valve is cut away. The perspective view which expands and shows a part of flow path formation member. The top view of a flow-path formation member. FIG. 4 is an enlarged longitudinal sectional view showing the periphery of an insertion portion.

Hereinafter, one embodiment of a flow control valve will be described with reference to FIGS.
As shown in FIGS. 1A and 1B, the valve housing 11 of the flow control valve 10 is cylindrical. The valve housing 11 has a cylindrical flow path forming member 12 made of metal and a cylindrical cover member 13 made of resin. The cover member 13 is assembled to the flow path forming member 12 in the axial direction of the valve housing 11. Therefore, the flow path forming member 12 and the cover member 13 are integrally assembled in a state where their respective axial directions match.

  As shown in FIG. 2, the flow path forming member 12 has a flow path 12a into which air as a fluid is introduced. The flow path 12a is opened at an end face of the flow path forming member 12 opposite to the cover member 13, and extends along the axial direction of the flow path forming member 12.

  Inside the flow path forming member 12, a valve hole 12b communicating with the flow path 12a is formed. Further, the passage forming member 12 is formed with a lead-out hole 12c through which air that has passed through the passage 12a and the valve hole 12b is led out. One end of the outlet hole 12c opens toward the outer peripheral surface of the flow path forming member 12, and the other end communicates with the valve hole 12b.

  A joint 14 is attached to the outer peripheral surface of the flow path forming member 12. In the joint 14, a passage 14a communicating with one end of the outlet hole 12c is formed. The air supplied from the flow path 12a is supplied to a fluid pressure device (not shown) through the valve hole 12b, the outlet hole 12c, and the passage 14a.

  The flow path forming member 12 has a cylindrical insertion portion 20 inserted inside the cover member 13. The nut 15 is housed in the insertion section 20. The nut 15 has a female screw hole 15a.

  In the valve housing 11, a columnar valve body 16 (needle valve body) made of metal is housed. One end of the valve body 16 in the direction in which the central axis L1 extends (the axial direction of the valve body 16) is a conical valve portion 16a. The distal end of the valve portion 16a can be inserted into the valve hole 12b. The space between the flow path 12a side and the insertion section 20 side in the flow path forming member 12 is sealed by an annular seal member 16s mounted on the outer peripheral surface of the valve body 16.

  As shown in FIG. 3, the valve body 16 has a cylindrical screw portion 16 b that can be screwed into the female screw hole 15 a of the nut 15. Further, the other end in the axial direction of the valve body 16 is a columnar shaft portion 16e extending from the screw portion 16b. The shaft portion 16e has a two-plane width shape having a pair of flat portions 16f.

  A cylindrical slide gear 17 is housed in the cover member 13. The slide gear 17 is disposed in the cover member 13 such that the center axis of the slide gear 17 coincides with the center axis L1 of the valve body 16.

  The slide gear 17 is formed with an insertion hole 17h having a width across flat surface having a pair of flat portions 17a. The insertion hole 17h extends along the direction in which the central axis of the slide gear 17 extends (the axial direction of the slide gear 17). The shaft 16e of the valve body 16 is inserted into the insertion hole 17h. Each flat portion 16f of the shaft portion 16e faces each flat portion 17a of the insertion hole 17h.

  An operation member 18 made of resin is rotatably attached to an end of the cover member 13 opposite to the flow path forming member 12. The operation member 18 has a covered cylindrical lid 18a, and a columnar insertion portion 18b protruding from the center of the inner surface of the lid 18a. The insertion portion 18 b is inserted into the cover member 13 through a hole 13 a formed at the end of the cover member 13 opposite to the flow path forming member 12, and is inserted into the slide gear 17. The operation member 18 is movable in the axial direction of the valve housing 11 with respect to the cover member 13.

  The insertion portion 18b is formed with a two-plane width insertion hole 18h having a pair of flat portions 18c. The shaft portion 16e is inserted into the insertion hole 18h. Each flat portion 16f of the shaft portion 16e faces each flat portion 18c of the insertion hole 18h.

  When the operating member 18 is rotated, the valve body 16 is integrally rotated via the respective flat portions 18c of the insertion hole 18h and the respective flat portions 16f of the shaft portion 16e. The slide gear 17 rotates integrally with the valve body 16 via each of the flat portions 16f of the above and the respective flat portions 17a of the insertion holes 17h.

  When the valve body 16 rotates in the forward direction, the screw portion 16b retreats from the female screw hole 15a, and the valve body 16 moves toward the operation member 18 along the axial direction of the valve housing 11. Thereby, the valve part 16a separates from the flow path 12a, the amount of the valve part 16a entering the valve hole 12b of the valve part 16a decreases, and the flow rate of the air flowing from the flow path 12a into the valve hole 12b increases. Therefore, the flow rate of air supplied from the flow path 12a to the fluid pressure device via the valve hole 12b, the outlet hole 12c, and the passage 14a increases.

  On the other hand, when the valve element 16 rotates in the direction opposite to the forward direction, the screw portion 16b advances with respect to the female screw hole 15a, and the valve element 16 separates from the operation member 18 along the axial direction of the valve housing 11. Move in the direction. As a result, the valve portion 16a approaches the flow channel 12a, and the amount of the air flowing into the valve hole 12b of the valve portion 16a increases, and the flow rate of the air flowing from the flow channel 12a into the valve hole 12b decreases. Therefore, the flow rate of the air supplied from the flow path 12a to the fluid pressure device through the valve hole 12b, the outlet hole 12c, and the passage 14a is reduced. Therefore, the valve element 16 adjusts the opening degree of the flow path 12 a by moving in the axial direction of the valve housing 11.

  A cylindrical display ring 19 is rotatably supported around the slide gear 17 in the cover member 13. The display ring 19 is disposed in the cover member 13 such that the central axis of the display ring 19 coincides with the central axis L1 of the valve element 16. Inside the display ring 19, a first biasing spring 17f that biases the slide gear 17 toward the inner end surface 13e around the hole 13a in the cover member 13 is disposed.

  As shown in FIG. 4, the display ring 19 has a first scale 19a and a second scale 19b as a display unit that indicates the number of rotations of the valve body 16. On the outer peripheral surface of the display ring 19, numerals “0” to “10” are printed as first scales 19a in a line in the circumferential direction of the display ring 19. Also, on the outer peripheral surface of the display ring 19, at positions shifted in the axial direction of the display ring 19 with respect to the first scale 19a, numerals "0" to "10" are set as second scales 19b. It is printed side by side in the circumferential direction. An annular gear portion 19c is provided at an axial end of the display ring 19. The gear portion 19c has a triangular wave shape in which irregularities are continuous along the circumferential direction of the display ring 19.

  As shown in FIG. 1A, a first display window 131 is formed in the cover member 13 so that the first scale 19 a faces the outside of the cover member 13. As shown in FIG. 1B, a second display window 132 is formed in the cover member 13 so that the second scale 19 b faces the outside of the cover member 13. The first display window 131 and the second display window 132 are arranged at positions 180 degrees apart in the circumferential direction of the cover member 13 and at positions shifted in the axial direction of the cover member 13.

  As shown in FIG. 5, in the axial direction of the cover member 13, a portion of the inner surface of the cover member 13 that faces the gear portion 19 c of the display ring 19 has an annular engagement portion 13 b that can engage with the gear portion 19 c. Are formed. The engaging portion 13b has a triangular wave shape in which irregularities are continuous along the circumferential direction of the cover member 13 at a portion of the inner surface of the cover member 13 facing the gear portion 19c.

  As shown in FIG. 3, a second biasing spring 19f that biases the display ring 19 toward the engagement portion 13b is interposed between the nut 15 and the display ring 19. When the display ring 19 is urged toward the engagement portion 13b by the urging force of the second urging spring 19f, and the gear portion 19c and the engagement portion 13b are engaged, the rotation of the display ring 19 is stopped. Regulated.

  As shown in FIG. 4, two engagement portions 171 and two switching portions 172 are provided on the outer peripheral surface of the slide gear 17. The two meshing portions 171 and the switching portion 172 are arranged at two positions on the outer peripheral surface of the slide gear 17 at an interval of 180 degrees in the circumferential direction of the slide gear 17. The meshing portion 171 and the switching portion 172 are arranged at positions shifted from each other by 90 degrees in the circumferential direction of the slide gear 17. The meshing portion 171 and the switching portion 172 are tapered in directions opposite to each other in the axial direction of the slide gear 17. As shown in FIG. 5, the meshing portion 171 is disposed to face the gear portion 19c in a direction along the central axis L1 of the valve body 16.

  As shown in FIG. 6, a pair of operation restricting portions 13 f are provided on the inner peripheral surface of the cover member 13 so as to protrude at intervals from each other in the circumferential direction of the cover member 13. The pair of operation restricting portions 13f are arranged closer to the operation member 18 than the display ring 19 in the axial direction of the cover member 13. Further, a portion of the pair of operation restricting portions 13f on the display ring 19 side forms a part of the engaging portion 13b. The pair of operation restricting portions 13f can slide on the meshing portion 171.

  Further, a switching gear portion 13k extending along the axial direction of the cover member 13 is provided on the inner peripheral surface of the cover member 13 so as to protrude therefrom. The switching gear portion 13k is disposed closer to the operation member 18 than the pair of operation restricting portions 13f in the axial direction of the cover member 13. The switching gear portion 13k is slidable with the switching portion 172.

  As shown in FIG. 7, a rotation locking portion 18f protrudes around the insertion portion 18b on the inner bottom surface of the lid portion 18a of the operation member 18. The rotation locking portion 18f has a triangular wave shape in which irregularities are continuous along the circumferential direction of the insertion portion 18b. The lid 18a of the operation member 18 is provided with four shaft locking portions 18g extending along the insertion portion 18b from the peripheral portion of the inner bottom surface of the lid 18a. The four shaft locking portions 18g are arranged at four positions at 90-degree intervals in the rotation direction of the operation member 18 on the peripheral edge of the inner bottom surface of the lid 18a. The four shaft locking portions 18g are elastically deformable in a direction in which the four shaft locking portions 18g come into contact with and separate from the insertion portion 18b with an end (base end) on the inner bottom surface side of the lid 18a as a base point. The tip of each shaft locking portion 18g has a hook shape.

  As shown in FIG. 4, on the inner peripheral surface of the hole 13a of the cover member 13, a rotation locked portion 13g that can lock the rotation locking portion 18f is formed. Also, on the outer peripheral surface of the end of the cover member 13 on the opposite side to the flow path forming member 12, a first shaft locked portion 13c and a second shaft locked portion capable of locking the four shaft locking portions 18g. A stop 13d is formed. The first shaft locked portion 13 c and the second shaft locked portion 13 d are grooves extending continuously over the entire outer circumferential surface of the cover member 13 in the circumferential direction of the cover member 13. The first shaft locked portion 13c and the second shaft locked portion 13d are arranged side by side in the axial direction of the cover member 13, and the first shaft locked portion 13c is connected to the second shaft locked portion. It is arranged closer to the flow path forming member 12 than 13d.

  As shown in FIG. 3, in a state where the four shaft locking portions 18g are locked to the first shaft locked portion 13c, the rotation locking portion 18f is locked to the rotation locked portion 13g. As a result, the rotation of the operation member 18 is restricted. The operation member 18 is positioned in the axial direction of the valve housing 11 because the four shaft locking portions 18g are locked to the first shaft locked portion 13c.

  As shown in FIG. 8, in a state where the four shaft locking portions 18g are locked to the second shaft locked portion 13d, the rotation locking portion 18f is locked to the rotation locked portion 13g. And the operation member 18 is allowed to rotate. The operation member 18 is positioned in the axial direction of the valve housing 11 because the four shaft locking portions 18g are locked to the second shaft locked portion 13d.

  When the operating member 18 is moved in a direction away from the flow path forming member 12 in the axial direction of the valve housing 11 from a state in which the four shaft locking portions 18g are locked to the first shaft locked portion 13c. Then, the four shaft locking portions 18g are elastically deformed in a direction away from the insertion portion 18b. Then, the leading end portions of the four shaft locking portions 18g cross over the step D1 between the first shaft locked portion 13c and the second shaft locked portion 13d on the outer peripheral surface of the cover member 13, and The two shaft locking portions 18g are returned to a state before elastic deformation, and are locked to the second shaft locked portion 13d.

  When the operating member 18 is moved in a direction approaching the flow path forming member 12 in the axial direction of the valve housing 11 from a state in which the four shaft locking portions 18g are locked to the second shaft locked portion 13d. Then, the four shaft locking portions 18g are elastically deformed in a direction away from the insertion portion 18b. Then, the leading end portions of the four shaft locking portions 18g cross over the step D1 between the first shaft locked portion 13c and the second shaft locked portion 13d on the outer peripheral surface of the cover member 13, and The two shaft locking portions 18g return to the state before elastic deformation and are locked to the first shaft locked portion 13c.

  As the operation member 18 moves in the axial direction of the valve housing 11, the shaft locking portion 18g is locked to the first shaft locked portion 13c, and the rotation locking portion 18f is engaged with the rotation locked portion 13g. Between a locked position where the shaft is locked and an unlocked position where the shaft locking portion 18g is locked by the second shaft locked portion 13d and the rotation locking portion 18f is not locked by the rotation locked portion 13g. Can be switched.

  When the operation member 18 is rotated in a state where the operation member 18 is switched to the unlock position, the valve body 16 is integrally rotated, and the slide gear 17 is rotated with the rotation of the valve body 16. And rotate together. Due to the rotational movement of the slide gear 17, the switching section 172 comes into contact with the switching gear section 13k. Further, by the rotation of the slide gear 17, the switching unit 172 slides on the switching gear unit 13k while sliding, so that the slide gear 17 is guided by the switching gear unit 13k to maintain the rotation. In addition, the valve body 16 linearly moves toward the nut 15 in the axial direction of the valve body 16 against the urging force of the first urging spring 17f.

  When the slide gear 17 linearly moves toward the nut 15 in the axial direction of the valve body 16 while maintaining the rotational movement, the meshing portion 171 meshes with the gear portion 19c. When the slide gear 17 further linearly moves toward the nut 15 in the axial direction of the valve body 16 while maintaining the rotational movement, the meshing portion 171 presses the display ring 19 while meshing with the gear portion 19c. Then, the display ring 19 moves in a direction in which the gear portion 19c separates from the engagement portion 13b against the biasing force of the second biasing spring 19f.

  When the engagement between the gear portion 19c and the engagement portion 13b is released, the rotational motion of the slide gear 17 is transmitted to the display ring 19 via the meshing portion 171 and the gear portion 19c, and the display ring 19 rotates. Further, when the slide gear 17 rotates, the meshing portion 171 comes into contact with one of the operation restricting portions 13f. Further, the linear motion is performed so that the slide gear 17 is repelled by the urging force of the first urging spring 17f and is pushed up at a stretch toward the inner end surface 13e around the hole 13a in the cover member 13 in the axial direction of the valve body 16. I do. Then, due to the rotational movement of the slide gear 17, the slide gear 17 moves while the meshing portion 171 is in sliding contact with the one operation restricting portion 13f.

  The switching unit 172 is moved by the urging force of the first urging spring 17f while slidingly contacting the switching gear unit 13k while maintaining the rotational movement of the slide gear 17. The display ring 19 linearly moves toward the engagement portion 13b by the urging force of the second urging spring 19f while maintaining the rotational movement. The display ring 19 linearly moves toward the engagement portion 13b by the urging force of the second urging spring 19f, and when the gear portion 19c is engaged with the engagement portion 13b, the rotation of the display ring 19 is restricted. .

  As a result, in the first display window 131, a portion corresponding to a value obtained by adding 0.5 to the value of the first scale 19a before the rotation operation of the operation member 18 is performed, is displayed. The amount is displayed, and the degree of opening of the flow path 12a based on the amount of rotation is counted. Further, in the second display window 132, a portion corresponding to a value obtained by adding 0.5 from the value of the second scale 19b before the rotation operation of the operation member 18 is performed is displayed in the second display window 132. The rotation amount of the operation member 18 is displayed, and the opening degree of the flow path 12a based on the rotation amount is counted. In the first display window 131 and the second display window 132, a first scale 19a and a second scale 19b of a portion corresponding to the same value are displayed. In the present embodiment, the number of rotations of the display ring 19 within one rotation of the operation member 18 is two.

  As shown in FIG. 9, the insertion portion 20 includes an uneven portion 21 formed on an outer peripheral surface 20 a of the insertion portion 20 and having a convex portion 21 a and a concave portion 21 b arranged in a circumferential direction of the insert portion 20. The uneven portion 21 is formed by subjecting the outer peripheral surface 20a of the insertion portion 20 to knurling, and has a plurality of convex portions 21a and concave portions 21b in the circumferential direction of the insertion portion 20. The plurality of protrusions 21a and the plurality of recesses 21b are alternately arranged in the circumferential direction of the insertion portion 20.

  The insertion portion 20 includes a groove 22 formed on the outer peripheral surface 20a of the insertion portion 20 and recessed from the outer surface 211a at the top of the projection 21a. The groove portion 22 is V-shaped, and extends continuously over the entire circumference of the insertion portion 20 in the circumferential direction. The groove portion 22 is formed on the insertion portion 20 so as to overlap the uneven portion 21 after forming the uneven portion 21 on the outer peripheral surface 20 a of the insertion portion 20. For this reason, the uneven portions 21 are partially disposed on both sides of the groove 22 in the axial direction of the valve housing 11.

  As shown in FIG. 10, the insertion section 20 includes a cylindrical section 23. The cylindrical portion 23 has an outer peripheral surface 23a located on an imaginary circle R1 about the center axis L2 of the flow path forming member 12. In the present embodiment, the virtual circle R1 is a circle that passes through the outer surface 211a of the top of the plurality of protrusions 21a, which is the outermost portion in the radial direction of the insertion portion 20 in the uneven portion 21. Therefore, the outer surface 211a at the top of the plurality of protrusions 21a is located on a virtual circle R1 centered on the center axis L2 of the flow path forming member 12, and is curved in an arc shape.

  As shown in FIG. 9, the cylindrical portion 23 is disposed on the opposite side to the cover member 13 from the uneven portion 21 in the axial direction of the valve housing 11. The outer peripheral surface 23a of the cylindrical portion 23 is continuous with the outer surface 211a of the top of the convex portion 21a, which is a part of the concave and convex portion 21 located on the side opposite to the cover member 13 with respect to the groove portion 22 in the axial direction of the valve housing 11. ing.

  As shown in FIG. 11, the inner diameter of the opening 13 h of the cover member 13 on the side of the flow path forming member 12 is smaller than the outer diameter of the virtual circle R <b> 1. Is inserted into.

  The cover member 13 has a press-fitted portion 31 that is press-fitted into the uneven portion 21. By forcibly inserting the insertion portion 20 into the opening 13 h of the cover member 13, each of the protrusions 21 a of the concave-convex portion 21 bites into a part of the press-fitted portion 31. The portion enters each concave portion 21 b of the uneven portion 21. Thereby, the positioning of the operation member 18 in the rotation direction with respect to the flow path forming member 12 in the cover member 13 is ensured.

  The cover member 13 has a locked portion 32 locked by the groove portion 22. In the locked portion 32, the insertion portion 20 is forcibly inserted into the opening 13 h of the cover member 13, and the opening 13 h side of the cover member 13 is forcibly expanded. It is a part of the cover member 13 that has digged into the groove 22 when trying to return to. Since the locked portion 32 is locked in the groove 22, the axial positioning of the valve housing 11 with respect to the flow path forming member 12 in the cover member 13 is ensured.

  The cover member 13 has a contact portion 33 that continuously contacts the outer peripheral surface 23a of the cylindrical portion 23 in the circumferential direction of the insertion portion 20. In the contact portion 33, the insertion portion 20 is forcibly inserted into the opening 13h of the cover member 13, the opening 13h side of the cover member 13 is forcibly expanded, and then the cover member 13 returns to the original shape. It is a part of the cover member 13 that contacts the outer peripheral surface 23a of the cylindrical portion 23 when trying to do so. Since the contact portion 33 is in contact with the outer peripheral surface 23a of the cylindrical portion 23, the flow path forming member 12 and the cover member 13 are aligned such that the central axis L2 of the flow path forming member 12 and the central axis L3 of the cover member 13 coincide with each other. 13 are assembled.

Next, the operation of the present embodiment will be described.
By the way, when it is desired to keep the opening of the flow path 12a constant, the operation member 18 is switched to the lock position in order to restrict the operation member 18 from rotating. At this time, if the operation member 18 is to be rotated, a force in the rotation direction acts on the cover member 13 via the rotation locking portion 18f and the rotation locked portion 13g. However, since the press-fitted portion 31 is press-fitted into the uneven portion 21, the positioning of the operation member 18 in the rotation direction of the flow path forming member 12 in the cover member 13 is ensured. Is restricted from rotating with respect to the flow path forming member 12.

  When the operation member 18 is switched from the lock position to the unlock position, when the operation member 18 is moved in a direction away from the flow path forming member 12 in the axial direction of the valve housing 11, the outer peripheral surface of the cover member 13 is moved. The top ends of the four shaft locking portions 18g attempt to climb over the step D1 between the first shaft locked portion 13c and the second shaft locked portion 13d. At this time, a force acts on the cover member 13 in a direction away from the flow path forming member 12 in the axial direction of the valve housing 11. However, since the locked portion 32 is locked in the groove portion 22, the axial positioning of the valve housing 11 with respect to the flow path forming member 12 in the cover member 13 is ensured. It is regulated that the channel 13 is separated from the channel forming member 12 and detaches from the channel forming member 12.

  Further, the urging force of the first urging spring 17 f acts on the cover member 13 via the slide gear 17 in a direction away from the flow path forming member 12 in the axial direction of the valve housing 11. Further, the urging force of the second urging spring 19f acts on the cover member 13 via the display ring 19 in a direction away from the flow path forming member 12 in the axial direction of the valve housing 11. However, since the locked portion 32 is locked in the groove portion 22, the axial positioning of the valve housing 11 with respect to the flow path forming member 12 in the cover member 13 is ensured. It is regulated that the channel 13 is separated from the channel forming member 12 and detaches from the channel forming member 12.

  Further, since the contact portion 33 is in contact with the outer peripheral surface 23a of the cylindrical portion 23, the flow path forming member 12 is adjusted so that the central axis L2 of the flow path forming member 12 and the central axis L3 of the cover member 13 coincide with each other. Since the cover member 13 and the cover member 13 are assembled, the valve body 16 is prevented from being difficult to move in the axial direction of the valve housing 11.

In the above embodiment, the following effects can be obtained.
(1) The insertion portion 20 is formed on the outer peripheral surface 20 a of the insertion portion 20 and has an uneven portion 21 having a convex portion 21 a and a concave portion 21 b arranged in the circumferential direction of the insertion portion 20, and an outer peripheral surface 20 a of the insertion portion 20. And a groove 22 recessed from the outer surface 211a at the top of the projection 21a, and a cylindrical portion 23 having an outer peripheral surface 23a located on the virtual circle R1. The cover member 13 includes a press-fitted portion 31 that is press-fitted into the uneven portion 21, a locked portion 32 that is locked into the groove portion 22, and a circumferential direction of the insertion portion 20 that is continuous with the outer peripheral surface 23 a of the cylindrical portion 23. And a contact portion 33 that makes contact. Since the press-fitted portion 31 is press-fitted into the uneven portion 21, the positioning of the operation member 18 in the rotation direction with respect to the flow path forming member 12 in the cover member 13 is ensured. Since the locked portion 32 is locked in the groove portion 22, the axial positioning of the valve housing 11 with respect to the flow path forming member 12 in the cover member 13 is ensured. Since the contact portion 33 is in contact with the outer peripheral surface 23a of the cylindrical portion 23, the flow path forming member 12 and the cover member 13 are aligned such that the central axis L2 of the flow path forming member 12 and the central axis L3 of the cover member 13 coincide with each other. 13 is assembled. As described above, while ensuring the positioning of the operation member 18 in the cover member 13 relative to the flow path forming member 12 in the rotation direction and the axial direction of the valve housing 11, the flow path forming member 12 and the cover member 13 are not moved. The flow path forming member 12 and the cover member 13 can be assembled so that the central axes L2 and L3 coincide with each other.

  (2) The outer surfaces 211a of the tops of the plurality of protrusions 21a are located on the virtual circle R1. According to this, by contacting the cover member 13 with the outer surface 211a at the top of the plurality of protrusions 21a, the center axis L2 of the flow path forming member 12 and the center axis L3 of the cover member 13 can be easily matched with each other. it can. Therefore, the flow path forming member 12 and the cover member 13 can be easily assembled so that the central axes L2 and L3 of the flow path forming member 12 and the cover member 13 coincide with each other.

  (3) The groove 22 extends continuously over the entire circumference of the insertion portion 20 in the circumferential direction. According to this, the locking of the locked portion 32 with respect to the groove 22 in the locked portion 32 is different from the case where the groove portion 22 is arranged on a part of the outer circumferential surface 20 a of the insertion portion 20 in the circumferential direction of the insertion portion 20. Since the number of parts is increased, the axial positioning of the valve housing 11 with respect to the flow path forming member 12 in the cover member 13 can be made strong.

  (4) Since the flow path forming member 12 and the cover member 13 can be assembled simply by inserting the insertion portion 20 into the opening 13h of the cover member 13, the circumferential direction between the flow path forming member 12 and the cover member 13 can be increased. Can be eliminated.

The above embodiment may be modified as follows.
In the embodiment, the outer peripheral surface 23a of the cylindrical portion 23 may be located outside the imaginary circle R1 in the radial direction of the insertion portion 20.

In the embodiment, the concavo-convex portion 21 may be one in which the convex portion 21 a and the concave portion 21 b are arranged one by one in the circumferential direction of the insertion portion 20 with respect to the outer peripheral surface 20 a of the insertion portion 20.
In the embodiment, the groove 22 may be disposed on a part of the outer peripheral surface 20 a of the insertion portion 20 in the circumferential direction of the insertion portion 20.

In the embodiment, the uneven portion 21 may be formed by performing serration processing on the outer peripheral surface 20 a of the insertion portion 20.
In the embodiment, the shape of the groove 22 is not particularly limited, and may be, for example, a U-shape.

In the embodiment, the groove 22 may be arranged at a position away from the concave-convex portion 21 in the axial direction of the valve housing 11.
In the embodiment, the groove portion 22 may be arranged closer to the cover member 13 than the uneven portion 21 in the axial direction of the valve housing 11.

  In the embodiment, the outer peripheral surface 23 a of the cylindrical portion 23 is located at the top of the convex portion 21 a, which is part of the concave and convex portion 21 located on the opposite side of the groove member 22 to the cover member 13 in the axial direction of the valve housing 11. The cylindrical portion 23 may not be continuous with the outer surface 211a, and may be arranged at a position away from the uneven portion 21 in the axial direction of the valve housing 11.

In the embodiment, the cylindrical portion 23 may be arranged closer to the cover member 13 than the uneven portion 21 in the axial direction of the valve housing 11.
In the embodiment, the outer surface 211a of the top of the convex portion 21a may not be located on the virtual circle R1 centered on the central axis L2 of the flow path forming member 12.

In the embodiment, the outer surface 211a of the top of the projection 21a may not be curved in an arc shape, and for example, the top of the projection 21a may be pointed.
In the embodiment, the flow rate control valve 10 that controls the flow rate of the liquid as the fluid may be used.

  R1 virtual circle, 10 flow control valve, 11 valve housing, 12 flow path forming member, 12a flow path, 13 cover member, 16 valve element, 18 operating member, 20 insertion section, 20a Outer peripheral surface, 21: uneven portion, 21a: convex portion, 21b: concave portion, 22: groove portion, 23: cylindrical portion, 23a: outer peripheral surface, 31: pressed-in portion, 32: locked portion, 33: contact portion, 211a ... outside.

Claims (3)

The valve includes: a cylindrical valve housing; a columnar valve body that adjusts an opening degree of a flow path by moving in an axial direction of the valve housing; and an operating member that rotates integrally with the valve body. The housing has a cylindrical flow path forming member made of metal in which the flow path is formed, and a cylindrical cover member made of resin that is assembled to the flow path forming member in the axial direction. And the flow path forming member has a cylindrical insertion portion inserted inside the cover member,
The insertion portion is formed on the outer peripheral surface of the insertion portion, and is arranged alternately in the circumferential direction of the insertion portion and has a plurality of projections and depressions extending along the axial direction. A groove formed on the outer peripheral surface of the portion, the groove being recessed from the outer surface of the top of the convex portion, and a virtual circle centered on the center axis of the flow path forming member, and the radial direction of the insertion portion in the uneven portion. An outer peripheral surface located on the virtual circle passing through the outermost portion, or a cylindrical portion having an outer peripheral surface located on the radial outside of the virtual circle,
The cover member has a press-fitted portion press-fitted into the concave-convex portion, a locked portion locked in the groove, and a contact portion continuously contacting the outer peripheral surface of the cylindrical portion in the circumferential direction. A flow control valve comprising: The uneven portion has a plurality of the convex portion and the concave portion,
The flow control valve according to claim 1, wherein the outer surfaces of the tops of the plurality of protrusions are located on the virtual circle.   The flow control valve according to claim 1, wherein the groove extends continuously over the entire circumference in the circumferential direction.