JP2018146007A - Joint member for connecting a shaft with a movable member driven by the shaft, a movable installing member for the shaft driven by the shaft and a shaft connecting movable body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint member capable of reducing a manufacturing cost of a movable member that is connected to a shaft by a joint member enabling the movable member to be oscillated against the shaft; a movable member for installation to the shaft that is driven by the shaft; and a shaft connecting movable body at a movable member connected to a shaft by a joint member enabling a movable member to be oscillated and fixed to the shaft.SOLUTION: An extremity end part of a valve shaft 50 is provided with a connecting part 56 having a small diameter part 60 and a swollen part 62 formed at an extremity end side of the small diameter part 60. There are provided a fixing part main body 72 and an installing member 80 held at the fixing part main body 72. The installing member 80 includes an outer edge flat part 86, an engaging part provided with an elastic deformable short tapered annular part, and an inserting and fitting hole formed by an end part of the engaging part. A diameter of the inserting and fitting hole of the installing member is smaller than an outer diameter of the swollen part 62 of the valve shaft 50 and substantially equal to or slightly larger than the outer diameter of the small diameter part 60.SELECTED DRAWING: Figure 12

Description

 The present invention relates to a joint member for connecting a shaft moved in the axial direction and a movable member driven by the shaft, a movable member for mounting on a shaft driven by the shaft, and a shaft-coupled movable body.

  Conventionally, in a joint member for connecting a shaft that is moved in the axial direction and a movable member that is driven by the shaft, even if there is a variation in the design or manufacturing accuracy of the shaft or the movable member, the movement is performed in the axial direction. There is known a prior art that can appropriately perform the function to be realized by the movable member when it is done, and avoid high cost. As this type of prior art, there is one in which the movable member is swingably attached to the shaft so that the angle of the movable member with respect to the shaft can be slightly changed.

  For example, in Patent Document 1 (described in Japanese Patent Application Laid-Open No. 2013-87803: see FIG. 2 and the like), the mounting portion 451d of the valve frame 451 of the valve member 45 can be tilted with respect to the connecting portion 444 at the tip portion of the valve shaft 44. It is attached. Therefore, even when the accuracy of the parallelism between the flat portion 451a of the valve frame 451 and the pressure regulating valve seat 411f varies, the valve frame 451 is tilted so that the flat portion 451a follows the pressure regulating valve seat 411f. Can be surely sealed. Moreover, even when a seal diameter of a certain level or more is required to ensure the passage of a predetermined amount of fluid, it is necessary to increase the load that presses the valve body as the crushing margin of the seal member increases. For this reason, it is possible to avoid an increase in cost due to an increase in the size of the valve device.

JP2013-87803 (FIG. 2 etc.)

  However, in the tiltable joint member disclosed in Patent Document 1 described above, the mounting portion 451d of the valve frame 451 formed by press-molding a metal plate is connected to the connecting portion 444 of the valve shaft 44 via the steel ball 446. By caulking against the valve shaft 44, the valve frame 451 is tiltably locked. At this time, since the accuracy of caulking affects the inclination of the valve shaft 44, the caulking work becomes complicated and contributes to the high manufacturing cost of the air pressure regulating valve 4.

  The present invention is intended to solve the above-described problems of the prior art, and in the movable member connected to the shaft by a joint member capable of swingably attaching the movable member to the shaft, the movable member is manufactured. The present invention provides a joint member, a movable member for mounting on a shaft driven by a shaft, and a shaft-coupled movable body that can reduce costs.

What achieves the above object is as follows.
(1) A joint member for connecting a shaft moved in the axial direction and a movable member driven by the shaft, wherein the shaft is formed on a columnar main body portion and a front end side of the main body portion. A distal end portion, and the distal end portion includes a connecting portion having a small diameter portion and a bulging portion formed on the distal end side of the small diameter portion, and the joint member is fixed to the movable member. A mounting portion main body; and a mounting member held by the mounting portion main body. The mounting member includes an outer edge flat portion and an elastic extending from the inside of the outer edge flat portion toward the center and obliquely forward of the outer edge flat portion. A locking portion having a deformable short tapered annular portion; and an insertion hole formed by an end of the locking portion; and the mounting portion main body holds the outer edge flat portion of the mounting member And the shaft The shaft has a lumen that allows the shaft to enter until the diameter portion is engaged with the insertion hole, and the diameter of the insertion hole of the mounting member is the outer diameter of the bulging portion of the shaft. It is smaller and is substantially equal to or slightly larger than the outer diameter of the small-diameter portion, and the lumen of the mounting portion main body is in a state where the small-diameter portion of the shaft is engaged with the insertion hole. The joint member is larger than the maximum outer diameter portion of the shaft that has entered the main body, and when the shaft is pushed in from the rear side, the distal end portion of the shaft becomes the joint member. It is mounted on the mounting member.

(2) The joint member according to (1), wherein the locking portion of the mounting member is formed by a plurality of locking claws, and the insertion hole is free of the plurality of locking claws. A joint member formed by the ends.
(3) The joint member according to (1), wherein the locking portion of the mounting member includes a plurality of slits formed in the tapered annular portion, and the slit is formed of the tapered annular portion. It is a joint member extending from the tip to the vicinity of the boundary with the outer edge flat portion.
(4) The joint member according to any one of (1) to (3), wherein the mounting member is a disk-shaped joint member.
(5) The joint member according to any one of (1) to (4), wherein the insertion hole has a substantially elliptical shape having a minor axis and a major axis, and the major axis is the axis of the shaft. The joint member is smaller than the outer diameter of the bulging portion and slightly larger than the outer diameter of the small-diameter portion.
(6) The joint member according to any one of (1) to (5), wherein the insertion hole has a substantially elliptical shape having a minor axis and a major axis, and the minor axis is formed on the shaft. The joint member is smaller than the outer diameter of the bulging portion and is substantially the same as or slightly smaller than the outer diameter of the small diameter portion.
(7) A movable member for mounting to a shaft that is mounted on a shaft that is moved in the axial direction and is driven by the shaft, wherein the shaft is formed on a columnar main body portion and a distal end side of the main body portion. A distal end portion, and the distal end portion includes a connecting portion having a small diameter portion and a bulging portion formed on the distal end side of the small diameter portion, and the mounting movable member includes a movable member main body portion, A mounting member held by the movable member main body, and the mounting member is elastically deformable extending from the inside of the outer edge flat part toward the center and obliquely forward of the outer edge flat part from the inside of the outer edge flat part. A locking portion; and an insertion hole formed by an end of the locking portion; the movable member main body portion holds the outer edge flat portion of the mounting member; and the small diameter of the shaft Until the part is in a state of engaging with the insertion hole, The shaft has a lumen that allows the shaft to enter, and the diameter of the insertion hole of the mounting member is smaller than the outer diameter of the bulging portion of the shaft and is substantially equal to or slightly larger than the outer diameter of the small diameter portion The inner cavity of the movable member main body portion is the largest outer diameter portion of the shaft that has entered the movable member main body portion in a state where the small diameter portion of the shaft is engaged with the insertion hole. The mounting movable member is capable of mounting the tip portion of the shaft to the mounting member of the mounting movable member by pushing the shaft from the rear side. This is a movable member for mounting on the shaft.
(8) The movable member for mounting on the shaft according to (7), wherein the movable member for mounting on the shaft is a movable member for mounting on the shaft including a valve element.
(9) The movable member for mounting on the shaft according to (7), wherein the movable member main body of the movable member for mounting on the shaft includes a movable member main body, a joint member fixed to the movable member, The joint member includes an attachment portion main body, and the attachment member is a movable member for attachment to a shaft held by the attachment portion main body.
(10) The movable member for mounting on the shaft according to (9), wherein the joint member is a movable member for mounting on the shaft which is the joint member according to any one of (1) to (6). is there.
(11) The movable member for mounting on the shaft according to (9) or (10), wherein the attachment main body is a movable member for mounting on the shaft welded to the movable member main body.
(12) The mounting movable member to the shaft according to any one of (9) to (11), wherein the mounting movable member includes a valve body and the joint member is accommodated therein. It is a movable member for mounting on a shaft provided with a housing portion that encapsulates the distal end side.
(13) A shaft-coupled movable body including a shaft that is moved in the axial direction and a movable member that is attached to the shaft that is attached to the shaft, wherein the shaft includes a columnar main body and a tip of the main body. A distal end portion formed on a side, the distal end portion includes a connecting portion having a small diameter portion and a bulging portion formed on the distal end side of the small diameter portion, and the mounting movable member includes: A movable member main body, and a mounting member held by the movable member main body, wherein the mounting member is formed from an outer edge flat portion and an inner side of the outer edge flat portion in a central direction and obliquely forward of the outer edge flat portion. An elastically deformable locking portion that extends, and an insertion hole formed by an end of the locking portion, the movable member main body portion holds the outer edge flat portion of the mounting member, and The small diameter portion of the shaft engages with the insertion hole. The shaft has a lumen that allows the shaft to enter, and the diameter of the insertion hole of the mounting member is smaller than the outer diameter of the bulging portion of the shaft and the outer diameter of the small diameter portion. The lumen of the movable member main body portion is substantially equal or slightly larger, and the shaft that has entered the mounting portion main body in a state where the small diameter portion of the shaft is engaged with the insertion hole. The shaft connecting movable body is attached to the attachment member of the attachment movable member by pushing the shaft from the rear side so that the tip end portion of the shaft is attached to the attachment member of the attachment movable member. It is a shaft connection movable body characterized by being made.
(14) The shaft-coupled movable body according to (13), wherein the movable member for mounting on the shaft is a movable shaft-coupled member that is a movable member for mounting on any one of the shafts (7) to (12). Is the body.
(15) The base end side of the small diameter portion of the shaft is provided with a tapered portion that gradually increases in diameter from the small diameter portion toward the shaft base end side. A movable member for mounting on a shaft according to any one of (7) to (12), or a movable shaft coupling body according to (13) or (14).
(16) The angle on one side of the tapered portion of the shaft is 10 ° to 70 ° with respect to the axial center of the shaft. (15) The joint member, the movable member for mounting on the shaft, or the shaft coupling movable Is the body.
(17) Any of (1) to (6), (15), or (16), wherein an outer diameter of the bulging portion is 0.05 mm to 0.4 mm larger than an outer diameter of the small diameter portion. The joint member according to (7) to (12), the movable member for mounting on the shaft according to any one of (15) or the shaft connection according to any one of (13) to (16) It is a movable body.
(18) The inner diameter of the insertion hole is 0.05 mm to 0.4 mm smaller than the outer diameter of the bulging portion, and is the same as or larger than the outer diameter of the small diameter portion. (1) to (6), for mounting on a joint member according to any one of (15) to (17), or to a shaft according to any one of (7) to (12), (15) to (17) A movable member or a shaft-coupled movable body according to any one of (13) to (17).

  The joint member of the present invention is a joint member for connecting a shaft that is moved in the axial direction and a movable member that is driven by the shaft, and the shaft includes a columnar main body portion and a distal end side of the main body portion. A distal end portion formed on the distal end portion, and the distal end portion includes a connecting portion having a small diameter portion and a bulging portion formed on the distal end side of the small diameter portion, and the joint member includes the movable member A mounting portion main body fixed to the mounting portion main body, and the mounting member from the inside of the outer edge flat portion and from the inside of the outer edge flat portion and obliquely toward the center of the outer edge flat portion. A locking portion having a short tapered annular portion that is elastically deformable forward and an insertion hole formed by an end portion of the locking portion, and the mounting portion main body is the outer edge of the mounting member Hold the flat part, and The shaft has a lumen that allows the shaft to enter until the small-diameter portion of the shaft is engaged with the insertion hole, and the diameter of the insertion hole of the mounting member is the bulge of the shaft. It is smaller than the outer diameter of the portion and is substantially equal to or slightly larger than the outer diameter of the small-diameter portion, and the lumen of the mounting portion main body is engaged with the insertion hole by the small-diameter portion of the shaft. In this state, the joint portion is larger than the maximum outer diameter portion of the shaft that has entered the main body, and the joint member is pushed from the rear side so that the tip connecting portion of the shaft is However, it is attached to the attachment member of the joint member. Therefore, in the joint member of the present invention, the movable member can be swingably attached to the shaft, and the manufacturing cost of the movable member can be reduced without requiring complicated work such as caulking. . Similarly, the manufacturing cost can be reduced also in the movable member for mounting on the shaft and the movable shaft coupling body of the present invention.

It is a fragmentary sectional view of the air pressure regulation valve using the joint member of the present invention. It is a fragmentary sectional view which shows the valve closing state of the air pressure regulation valve shown in FIG. FIG. 2 is a schematic partial sectional view showing an engagement state between an output shaft and a valve shaft of a stepping motor used in the air pressure regulating valve shown in FIG. 1. It is a partial end elevation of a valve shaft, a joint member, and a valve member. It is an end view of a joint member. It is a top view of a joint member. It is a side view of a joint member. It is a bottom view of a joint member. It is a top view of a mounting member (plate spring). It is an end view of a mounting member. It is a fragmentary end view for demonstrating the state in which the joint member and the valve member inclined with respect to the valve shaft. It is a principal part expanded end view of FIG. It is a front view of the valve shaft of another embodiment of this invention. It is a front view of the valve shaft of another embodiment of this invention. It is a front view of the valve shaft of another embodiment of this invention. It is a partial end view of the joint member of another embodiment of this invention, a valve shaft, and a valve member.

  As shown in FIG. 1, the joint member 70 of the present invention is used for the air pressure regulating valve 1. More specifically, the valve member 50 is an example of the “movable member” of the present invention on the valve shaft 50. Used to attach 100. The joint member 70 includes a mounting portion main body 72 and a mounting member 80 (plate spring). The valve member 100 also constitutes the “movable member main body” of the present invention. Further, the attachment portion main body 72, the mounting member 80, and the valve member 100 also constitute a “movable member for mounting” on the shaft of the present invention. Further, the mounting portion main body 72, the mounting member 80, the valve member 100, and the valve shaft 50 also constitute the “shaft coupling movable body” of the present invention. A connecting portion 56 to which the joint member 70 is attached is integrally formed on the distal end side of the main body portion 54 of the valve shaft 50, and the connecting portion 56 extends to the distal end side of the main body portion 54 and is based on the valve shaft 50. A tapered portion 58 that expands in the end direction, a small-diameter portion 60 that extends to the distal end side of the tapered portion 58, and a bulging portion 62 that is located on the distal end side of the small-diameter portion 60 and at the distal end of the valve shaft 50 Have The bulging portion 62 of the valve shaft 50 is press-fitted into the mounting member 80 (plate spring) of the joint member 70, and the joint member 70 is rockably locked at the small diameter portion 60.

  The air pressure regulating valve 1 is provided with a pressure regulating valve inlet 13a that opens on the right side in FIG. 1, and a pressure regulating valve outlet 13b is provided below the pressure regulating valve inlet 13a. Then, the amount of air discharged is adjusted by adjusting the opening of the air pressure regulating valve 1.

  The air pressure regulating valve 1 is configured by attaching a motor assembly 30 to the outer peripheral surface of a valve housing 10. The valve housing 10 is formed by coupling a valve body 11 formed of a synthetic resin material such as polyphenylene sulfide and a valve cover 20 integrally formed of a metal plate to each other. Although the motor assembly 30 using an electric motor is used as a drive source, the present invention is not limited to this, and a solenoid actuator or an actuator driven by gas pressure may be used. In this example, an example of a shaft that is moved by a drive source using an electric motor or the like will be described. However, the present invention can also be applied to a shaft that is not moved by a specific drive source. .

  The flange portion 14 of the valve body 11 is provided with a fixing hole 15 in which a female screw is formed in order to attach the air pressure regulating valve 1 to the vehicle. A valve seat 16 is formed between the pressure regulating valve inlet 13a and the pressure regulating valve outlet 13b. In the present embodiment, the valve seat 16 is formed in a flat annular shape.

  The valve cover 20 is attached to the upper end surface of the valve body 11, and is integrally press-molded from a metal plate. The motor assembly 30 described above is attached to the upper surface of the valve cover 20. The motor assembly 30 is fixed to the valve cover 20 in a state where the outer peripheral surface of the mechanism housing portion 32 of the motor case 31 is fitted to the inner peripheral surface of the shaft housing portion 42.

  As shown in FIG. 3, a stepping motor 33 is fixed to the inner wall of the motor case 31. The tip of the output shaft 34 of the stepping motor 33 has a cylindrical shape, and a drive hole 35 is formed in the axial center thereof. A female screw 36 having a predetermined length is formed on the inner peripheral surface of the drive hole 35, and is screwed with a male screw 57 formed on the outer peripheral surface of the end portion of the valve shaft 50.

  The valve shaft 50 is formed of a metal material such as stainless steel, and a two-sided width portion 52 is formed below the male screw 57. The two-surface width portion 52 is engaged with a pair of opposed surfaces 37 formed at the lower end portion of the motor case 31, whereby the valve shaft 50 is not rotatable with respect to the motor case 31. Therefore, when the output shaft 34 of the stepping motor 33 rotates in one direction, the valve shaft 50 descends in the axial direction in the valve housing 10, and when the output shaft 34 rotates in the opposite direction, the valve shaft 50 rises.

  As shown in FIGS. 1 and 3, a cylindrical main body 54 that protrudes from the motor case 31 and extends in the axial direction with a certain diameter is formed below the two-surface width portion 52 of the valve shaft 50. . The outer diameter of the main body portion 54 in this example is 8 mm until reaching the tapered portion 58 on the tip side. The outer peripheral surface of the main body portion 54 is supported by a shaft retainer portion 44 formed at the lower end of the shaft housing portion 42 of the valve cover 20 so as to be movable in the axial direction. It is desirable to improve the wear resistance of these sliding surfaces by applying electroless nickel plating or the like to the outer peripheral surface of the main body portion 54 or the shaft retainer portion 44 that are in contact with each other.

  As shown in FIG. 4, a connecting portion 56 to which a joint member 70 to be described later is attached is integrally formed on the distal end side of the main body portion 54. The connecting portion 56 includes a tapered portion 58 that extends to the distal end side of the main body portion 54 and expands in the proximal direction of the valve shaft 50, a small diameter portion 60 that extends to the distal end side of the tapered portion 58, and a small diameter portion. 60 and a bulging portion 62 located at the tip of the valve shaft 50. The small diameter part 60 is formed to have a smaller diameter than the bulging part 62. The tapered portion 58 is formed so as to gradually increase in diameter toward the main body portion 54 so as to have a larger diameter than the small diameter portion 60. As will be described later, the bulging portion 62 is press-fitted into the mounting member 80, and the joint member 70 is rockably locked at the small diameter portion 60.

  As described above, on the distal end side of the main body portion 54, the tapered portion 58 that is continuous with the small diameter portion 60 while being expanded in the proximal direction of the valve shaft 50 is formed. The tapered portion 58 of this example is reduced in diameter toward the valve shaft 50 at an angle of about 15 ° on one side with respect to the shaft center, that is, about 30 ° around the shaft center. Thus, the small diameter portion 60 is not directly formed from the columnar main body portion 54 having a larger diameter than the small diameter portion 60, but is smaller in diameter than the main body portion 54 in the distal direction. By forming the tapered portion 58, the clearance with respect to the outer surface of the valve shaft 50 is slightly larger above the insertion hole 84 of the mounting member 80 in a state where the mounting member 80 is locked at the small diameter portion 60. Therefore, the possibility that the swing of the mounting member 80 with respect to the valve shaft 50 is hindered by the outer surface of the shaft can be reduced. Further, when the valve shaft 50 is moved to the distal end side by the drive source, the mounting member 80 is slightly displaced relative to the valve shaft 50, and at this time, the leaf spring gradually moves with respect to the tapered portion 58. Therefore, the valve body can be seated slightly gently.

  A small-diameter portion 60 having a smaller diameter than the tapered portion 58 is formed on the distal end side of the tapered portion 58. The outer diameter of the small-diameter portion 60 is about 3.84 mm in this example. As will be described later, the mounting member 80 attached to the valve shaft 50 is locked to the small diameter portion 60. Further, in order to provide a uniform gap with the insertion hole 84 on the inner side of the mounting member 80, the cross-sectional shape thereof is substantially a perfect circle.

  A bulging portion 62 having a diameter larger than that of the small diameter portion 60 is formed on the distal end side of the small diameter portion 60. The bulging portion 62 is formed in a generally spherical shape at the tip of the valve shaft 50. Moreover, the bottom view shape of the bulging part 62 is substantially circular. In this example, the bottom-view outer diameter of the bulging portion is about 3.95 mm.

  The inclination angle on one side of the tapered portion 58 is desirably 10 ° to 70 °, and more desirably 25 ° to 55 °. In addition, the outer diameter of the small diameter portion 60 is desirably small in order to reduce the outer diameter of the valve member 100 and the like, but is preferably 2 mm to 5 mm, for example. On the other hand, the outer diameter of the bulging portion 62 is desirably 2 mm to 5.5 mm. Further, the outer diameter of the bulging portion 62 is desirably 0.05 mm to 0.4 mm larger than the outer diameter of the small diameter portion 60, and more preferably 0.07 to 0.3 mm larger. Is desirable. By making the difference between the outer diameters of the bulging portion 62 and the small diameter portion 60 as described above, an excessive force is not required when the bulging portion 62 is press-fitted into the insertion hole 84 of the mounting member 80. The locking portion 87 of the mounting member 80 that gets over the bulging portion 62 and is locked to the small diameter portion 60 is configured so that the valve shaft 50 is difficult to be pulled out of the mounting member 80 by going over the bulging portion 62. Yes. In this embodiment, the outer diameter of the small diameter portion 60 is 3.84 mm, and the outer diameter of the bulging portion 62 is 3.95 mm.

  Next, the joint member 70 of the present invention will be described. As shown in FIGS. 5 to 8, the joint member 70 is directly fixed to the resin-made cylindrical mounting portion main body 72 and the connecting portion 56 of the valve shaft 50, which is fixed in the mounting portion main body 72. A mounting member 80 (plate spring) to be mounted is provided. The attachment portion main body 72 is a substantially cylindrical resin part, and includes a cylindrical main body portion 73 and a flange portion 74. The mounting member 80 is accommodated and held inside a lumen 77 opened at the center of the cylindrical main body 73 in plan view. As shown in FIG. 5, the mounting member 80 is insert-molded so that the outer edge flat portion 86 is sandwiched and accommodated and fixed in the cylindrical body portion 73.

  In the cylindrical main body 73, an inner cavity 77 that can accommodate the connecting portion 56 of the valve shaft 50 is formed. The flange 74 is capable of positioning the joint member 70 with respect to the valve member 100 by contacting the stepped portion in the valve member 100 from above when welding the joint member 70 in the valve member 100 described later. . Further, as shown in FIG. 7, a plurality of ribs 78 are formed on the outer peripheral surface of the cylindrical body portion 73 below the flange 74 along the axial direction of the cylindrical body portion 54. When the joint member 70 is welded into the valve member 100, the rib member 78 is welded to the valve member 100.

  The joint member 70 and the valve member 100 are not limited to being fixed by ultrasonic welding. For example, a male screw is formed on the cylindrical main body 73 of the joint member 70, and the valve member 100 can be screwed with the male screw. It is also possible to form a female screw and fix both members by screwing.

  The inner cavity 77 of the joint member 70 is opened at the center in plan view, and the inner diameter of the upper opening of the inner cavity 77 is about 9 mm. When the connecting portion 56 of the valve shaft 50 is mounted on the mounting member 80, the body portion 54 of the valve shaft 50 is inserted into the inner cavity 77. In this example, in this state, a gap of about 0.5 mm is formed around the main body 54 between the inner peripheral surface of the lumen 77 and the outer peripheral surface of the main body 54 of the valve shaft 50. Therefore, the lumen 77 is larger than the maximum outer diameter portion of the valve shaft that has entered the mounting portion main body 72 in a state where the small diameter portion 60 of the valve shaft 50 is engaged with the insertion hole 84 of the mounting member 80. ing. As shown in FIGS. 11 and 12, the gap allows the joint member 70 to be inclined with respect to the valve shaft 50, and the joint member 70 is kept in contact with the lumen 77 and the main body 54. Allow tilt. The gap between the lumen 77 and the main body 54 is determined at an appropriate distance in advance according to the required and allowable angle of inclination of the joint member 70 with respect to the valve shaft 50. In this example, the inclination θ of the joint member 70 with respect to the valve shaft 50 is configured to be about 1.5 ° in any of the radial directions of the main body portion 54. The size of the gap between the lumen 77 and the main body portion 54 follows the valve seat 16 so that the valve member 100 can be sealed with respect to the valve shaft 50 so that the valve body 11 can be sealed when seated on the valve seat 16. The seal member 104 is set based on the diameter of the seal portion with respect to the valve seat 16 so as to be inclined by a predetermined amount. In this example, the body portion 54 of the valve shaft 50 is located at the opening portion of the lumen 77, but the present invention is not limited to this. For example, a tapered portion 58 is located, and the tapered portion 58, the lumen 77, An appropriate gap may be provided between the two. In addition, another member that can swing the attachment main body 72 may be interposed in the gap. For example, by attaching an elastic member such as a seal member in the inner cavity 77, there is no gap itself, but when the tilting force is applied to the mounting portion main body 72, it is compressed and the mounting portion main body 72 swings. It is also possible to configure so as to allow

  As shown in FIGS. 9 and 10, the mounting member 80 is a substantially disc-shaped plate spring made of stainless steel. An insertion hole 84 into which the valve shaft 50 can be inserted is formed at the center. Further, an outer edge flat portion 86 is formed on the periphery of the mounting member 80, and an elastically deformable locking portion 87 extending from the outer edge flat portion 86 toward the center of the outer edge flat portion 86 and obliquely forward (downward in the drawing). The locking portion 87 is formed in a tapered annular portion. The insertion hole 84 is configured by an end 89 of the locking portion 87.

  In this example, the locking portion 87 is composed of a plurality of locking claws 88, and the insertion hole 84 is composed of end portions 89 of the plurality of locking claws 88. In this example, six locking claws 88 are formed at equal intervals along the inner periphery of the outer edge flat portion 86. The locking portion 87 is provided with a plurality of slits between the locking claws 88, and the slit extends from the end portion 89 of the locking portion 87 to the vicinity of the boundary portion with the outer edge flat portion 86, and the valve shaft 50 is expanded. The protruding portion 62 is configured to be smoothly inserted into the insertion hole 84. In addition, the number of latching claws can also be made into another number. Further, the locking portion is not necessarily provided with a slit as long as the distal end thereof is elastically deformed and the insertion hole can be expanded, and the locking portion may be provided in an annular shape inside the outer edge flat portion 86. .

  Further, in the mounting member 80 of this example, the overall outer diameter is about 12 mm, the height is about 1.4 mm, the thickness of the outer edge flat portion 86 and the locking portion 87 is about 0.3 mm, and the insertion hole 84 is The inner diameter is about 3.84 mm. The locking portion 87 rises from the inner peripheral end of the outer edge flat portion 86 at an angle of about 105 °. The above-described rising angle of the locking portion 87 is desirably 40 ° to 150 °, and more desirably 70 ° to 120 °. Further, the mounting member is not limited to the above. For example, the mounting member may have an overall outer diameter of about 10.5 mm, a height of 1.3 mm, and a rising angle from the outer edge flat portion of the locking portion of about 82 °. it can.

  Further, in this example, the inner diameter of the insertion hole 84 is about 0.1 mm smaller than the outer diameter of the bulging portion 62 of the valve shaft 50, and about 3.84 mm, which is substantially the same as the outer diameter of the small diameter portion 60. Has been. Therefore, when the connecting portion 56 of the valve shaft 50 is press-fitted into the mounting member 80 from the opposite side to the protruding direction of the locking portion 87, each insertion hole 84 is slightly expanded so that each locking The claw 88 is slightly elastically deformed so that the bulging portion 62 of the valve shaft 50 can pass through the insertion hole 84. The valve shaft 50 that has passed through the bulging portion 62 is locked to the mounting member 80 at the small diameter portion 60. The inner diameter of the insertion hole 84 is 0.05 mm to 0.4 mm smaller than the outer diameter of the bulging portion 62, and is substantially the same as the outer diameter of the small diameter portion 60 or a range up to about 0.3 mm. It is desirable to be large within. In addition, the insertion hole 84 described above has a substantially circular shape, but may be a substantially elliptical shape having a short diameter and a long diameter. In this aspect, the long diameter is outside the bulging portion of the valve shaft. It can be smaller than the diameter and slightly larger than the outer diameter of the small diameter portion. Moreover, the short diameter can be made smaller than the outer diameter of the bulging part of the valve shaft and substantially the same as or slightly smaller than the outer diameter of the small diameter part.

  In a state where the valve shaft 50 is locked in the small diameter portion 60, when the valve shaft 50 moves in the direction of being pulled out from the joint member 70, the end portion of each locking claw 88 rising toward the bulging portion 62 direction. 89 is configured to be able to be locked to the upper portion of the bulging portion 62. In the mounting member 80 thus locked to the small diameter portion 60, the end portion 89 of each locking portion 88 is brought into contact with the proximal end side of the bulging portion 62, and the valve shaft 50 is removed from the mounting member 80. It is strongly regulated so as not to escape. Further, the taper portion 58 that gradually increases in diameter from the small diameter portion 60 to the base end side restricts the movement of the mounting member 80 from the small diameter portion 60 to the base end side. On the other hand, in the taper part 58, the shape which expands from the small diameter part 60 to the base end side of the valve shaft 50 is gradually enlarged, and it does not become a shape which protrudes. Therefore, when the mounting member 80 swings with respect to the valve shaft 50, the possibility that the valve shaft 50 prevents the mounting member 80 from swinging at a predetermined angle can be reduced.

  Due to the gap between the insertion hole 84 of the mounting member 80 and the small diameter portion 60, the joint member 70 connected to the valve shaft 50 via the small diameter portion 60 swings within a certain angle with respect to the valve shaft 50. It is possible to move. The distance of the gap is determined in advance so that the joint member 70 can swing to a predetermined angle. On the other hand, the distance of the gap is determined so that the joint member 70 can be sufficiently locked to the bulging portion 62. The connection part 56 of the shaft 50 is prevented from being detached from the joint member 70. As described above, the swingable angle of the joint member 70 is determined by the inner diameter of the inner cavity 77 of the attachment portion main body 72 through which the valve shaft 50 is inserted and the outer diameter of the main body portion 54 of the valve shaft 50 to be inserted. The angle that can be swung is finally determined also by the gap between them.

  Further, the outer edge flat portion 86 of the mounting member 80 has a sufficient width, and the outer edge flat portion 86 is clamped and fixed in the mounting portion main body 72 and is securely held by the mounting portion main body 72 so that the pulling strength is not less than a predetermined value. It is said. Further, the rising angle of each locking claw 88 is set to a predetermined value or more. The rising angle of each locking claw 88 is set to a predetermined value or more while having an outer edge flat portion 86 with a predetermined width for reliable fixing to the mounting portion main body 72 and further having an insertion hole 84 with a predetermined inner diameter. Thus, the outer diameter of the mounting member 80 is reduced. Therefore, the outer diameter of the entire joint member 70 can also be reduced, and the joint member 70 can be reduced in size.

  As shown in FIG. 1, the valve member 100 is attached so that the valve shaft 50 extends in the radial direction with respect to the axial center of the valve shaft 50 via a joint member 70. The valve frame 101 of the valve member 100 has a flat surface portion 103 extending in a disk shape in the radial direction with respect to the axial center of the valve shaft 50, and a sealing member is provided so as to cover the outer peripheral edge of the flat surface portion 103. 104 is fixed.

  In this example, the seal member 104 uses EPDM (ethylene-propylene-diene copolymer), but other heat-resistant synthetic rubber materials such as SBR (styrene-butadiene rubber) may be used. As shown in FIG. 2, when the valve member 100 is lowered, the seal member 104 is brought into contact with the pressure regulating valve seat 16 formed on the valve body 11.

  A bottomed cylindrical accommodating portion 105 capable of accommodating and fixing the joint member 70 is formed at the lower end of the valve frame 101. The accommodating part 105 is formed in the internal diameter which can contact | abut to the outer peripheral surface of the cylindrical main-body part 73 of the joint member 70 mentioned above, In the contact part, specifically the rib 78 of the cylindrical main-body part 73 mentioned above. Ultrasonic welding. Further, a step portion 106 with which the flange portion 74 of the joint member 70 can abut is formed at the opening portion of the accommodating portion 105, and the flange portion 74 of the joint member 70 is the step portion 106 during welding. It can be positioned with respect to the valve frame 101 by being placed thereon. In addition, the bottom portion 107 of the housing portion 105 has the tip portion of the joint member 70 and the bulging portion 62 of the valve shaft 50 protruding from the tip portion in a state where the joint member 70 is positioned with respect to the valve frame 101 as described above. Are formed at a distance that provides a certain gap between them. The accommodating portion 105 including the bottom portion 107 is formed in a bag shape without a hole or the like, and is formed so as not to communicate with the pressure regulating valve outlet 13b side.

  A connecting portion 110 extending upward in a cylindrical shape is formed above the flat portion 103 of the valve member 100, and a tightening portion 112 is provided from the upper end of the connecting portion 110 toward the radially outer side. Above the tightening portion 112, a bottomed cylindrical diaphragm holder 116 is provided, and the bottom surface of the bottom portion 117 of the diaphragm holder 116 is in contact with the upper portion of the tightening portion 112.

  The inner peripheral edge of the diaphragm 120 is fixed between the tightening portion 112 and the bottom portion 117 of the diaphragm holder 116. The diaphragm 120 is integrally formed of a synthetic rubber material, and a mounting hole 122 is formed at the center. The peripheral edge of the mounting hole 122 is clamped in the vertical direction and fixed in a liquid-tight manner.

  The outer peripheral edge of the diaphragm 120 is clamped between the upper end surface of the valve body 11 and the lower end of the valve cover 20 and is fixed in a liquid-tight manner. As described above, the diaphragm 120 is attached to the inner peripheral surface of the valve housing 101 and the valve member 100, whereby the inside of the valve housing 10 is divided into two by the diaphragm 120 and the valve member 100. That is, the inside of the valve housing 10 includes a pressure regulating valve inlet 13a, a pressure regulating valve outlet 13b, and a valve seat 16, a fluid chamber 17 through which the supplied fluid passes, and air that is prevented from entering the fluid and is filled with air. A chamber 18 is formed. The air chamber 18 communicates with the outside air through a vent hole (not shown) provided in the valve cover 20.

  Next, an operation method of the air pressure regulating valve 1 will be described. As shown in FIG. 1, when the valve shaft 50 is on the upper side and the seal member 104 of the valve member 100 is separated from the valve seat 16, the air pressure regulating valve 1 is in an open state. In this state, the pressure regulating valve inlet 13a and the pressure regulating valve outlet 13b are in communication, and fluid such as air can flow between them.

  When the stepping motor 33 is rotated in one direction by the drive signal, the valve member 100 is lowered together with the valve shaft 50, and the seal member 104 is seated on the valve seat 16 as shown in FIG. Thus, the air pressure regulating valve 1 is closed, the communication between the pressure regulating valve inlet 13a and the pressure regulating valve outlet 13b is cut off, and the fluid flow between them is also cut off.

  Here, the joint member 70 of the present invention is configured to be swingable with respect to the valve shaft 50 as described above. Therefore, even if the accuracy of the parallelism between the flat surface portion 103 of the valve frame 101 and the valve seat 16 varies, the valve frame 101 is tilted so that the flat surface portion 103 follows the valve seat 16, and a more reliable sealing is achieved. Can do.

  Further, the valve member 100 has a predetermined angle or more that is regulated by a gap between the inner peripheral surface of the lumen 77 opened in the attachment portion main body 72 of the joint member 70 and the outer peripheral surface of the main body portion 54 of the valve shaft 50. Therefore, the valve frame 101 does not tilt more than necessary, and vibration and noise of the valve member 100 can be suppressed. Therefore, fluctuations in the flow rate of air passing through the inside of the air pressure regulating valve 1 can be reduced, the flow rate control performance of the air pressure regulating valve 1 can be improved, and noise can also be reduced.

  Further, the joint member 70 that can swing with respect to the valve shaft 50 can be completed simply by inserting and connecting the valve shaft 50 to the joint member 70 prepared in advance. Therefore, since the assembling process does not require an elaborate operation such as “caulking”, the manufacturing process of the air pressure regulating valve 1 can be simplified.

  Further, since the joint member 70 in which the mounting portion main body 72 is accommodated and fixed to the mounting member 80 is welded and fixed to the valve frame 101, when the specification of the valve frame needs to be changed, only the valve frame is required. The joint member 70 can be used as it is simply by changing the above. Therefore, the cost for changing the valve frame can be reduced. In the case of such a change, it is necessary to form an accommodating portion for accommodating the joint member 70 similar to the valve frame 101 described above on the valve frame side.

  Moreover, since the accommodating part 105 which accommodated the joint member 70 is formed in the bag shape, it is not necessary to enlarge the air pressure regulating valve 1 without using a special sealing member, and the moisture in the accommodating part 105 can be reduced. Intrusion of foreign matter can be reduced.

  The mounting member (leaf spring) is not limited to that described above, and may have other shapes. For example, the shape and number of the locking claws can be different. If the bulging portion 62 is elastically deformed so that it can pass and can be locked to the small-diameter portion 60, and if the bulging portion 62 can be brought into contact with difficulty in removal, a leaf spring without a slit can be used. It can also be used.

  Further, the valve shaft used in the present invention is not limited to that described above. For example, the angle of the tapered portion can be changed. In addition, about the structure similar to embodiment mentioned above below, the same code | symbol is attached | subjected in drawing and the description is abbreviate | omitted. In the valve shaft 50a shown in FIG. 13, the angle on one side of the tapered portion 58 with respect to the axis is about 50 ° and about 100 ° around the axis. Further, in the valve shaft 50b shown in FIG. 14, the angle of the tapered portion 58 is about 70 ° on one side and about 140 ° around the axis.

  Moreover, the outer diameter of the small diameter part 60 and the bulging part 62 can also be changed. For example, in the valve shaft 50c shown in FIG. 15, the angle of the tapered portion 58 is about 100 ° around the axis of the valve shaft 50c, and the bulging portion 62 is about 3.95 mm as in the valve shaft 50 described above. The small diameter portion 60 has an outer diameter of about 3.80 mm. The small diameter portion 60 may have an outer diameter of about 3.84 mm as in the valve shaft 50 described above, and the bulging portion 62 may have an outer diameter of about 3.90 mm. Further, the small diameter portion 60 may have an outer diameter of about 3.84 mm, similar to the valve shaft 50 described above, and the bulging portion 62 may have an outer diameter of about 4.00 mm.

  Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, the mounting member 80 is directly fixed to the valve member 100a. That is, in the above-described embodiment, the joint member 70 including the attachment portion main body 72 and the mounting member 80 is fixed to the valve member 100 that is an example of the “movable member”. The valve member 100a is an integrated valve member 100a. Therefore, the valve member 100a also constitutes the “movable member body” of the present invention. Further, the valve member 100a and the mounting member 80 also constitute a “mounting movable member” to the shaft of the present invention. Furthermore, the valve member 100a, the mounting member 80 (that is, the aforementioned “moving member for mounting”) and the valve shaft 50 constitute the “shaft coupling movable body” of the present invention. In this embodiment, the outer edge flat portion 86 of the mounting member 80 is placed on the step portion formed inside the valve member 100a, and another member is placed from above the outer edge flat portion 86 so that the step portion and The mounting member 80 can be directly fixed to the valve member 100a by being sandwiched by this member and laser welding or the like. In the present embodiment, a fixing operation for welding the attachment main body 72 and the valve member 100a as in the above-described embodiment can be omitted, and the manufacturing cost can be reduced. Moreover, there is no need to worry about insufficient strength at the fixing portion between the attachment portion main body 72 and the valve member 100a as in the above-described embodiment.

  As described above, the joint member of the present invention shows the valve body for fluid control as an example of the movable member. However, the movable member to be attached is not limited to this and may support other movable members.

DESCRIPTION OF SYMBOLS 1 Air pressure regulating valve 10 Valve housing 11 Valve body 13a Pressure regulating valve inlet 13b Pressure regulating valve outlet 14 Flange portion 15 Fixing hole 16 Valve seat 17 Fluid chamber 18 Air chamber 20 Valve cover 30 Motor assembly 31 Motor case 32 Mechanism accommodating portion 33 Stepping motor 34 Output shaft 35 Drive hole 36 Female screw 37 Opposing surface 42 Shaft accommodating portion 44 Shaft retainer portion 50 50a 50b 50c Valve shaft 51 Inclined step portion 52 Two-sided width portion 53 Small diameter cylindrical portion 54 Main body portion 55 Step portion 56 Connecting portion 57 Male Screw 58 Tapered part 60 Small diameter part 62 Swelling part 70 Joint member 72 Mounting part main body 73 Cylindrical main body part 74 Flange part 77 Insertion hole 78 Rib 80 Mounting member 84 Insertion hole 86 Outer edge flat part 87 Locking part 88 Locking claw 89 End part 100 100a Valve part Material 101 Valve frame 103 Flat portion 104 Sealing member 105 Housing portion 106 Step portion 107 Bottom portion 110 Connecting portion 112 Tightening portion 116 Diaphragm holder 117 Bottom portion 120 Diaphragm 122 Mounting hole

Claims (18)

A joint member for connecting a shaft moved in the axial direction and a movable member driven by the shaft,
The shaft includes a columnar main body portion and a front end portion formed on a front end side of the main body portion, and the front end portion includes a small diameter portion and a bulging portion formed on a front end side of the small diameter portion. Part,
The joint member includes a mounting portion main body fixed to the movable member, and a mounting member held by the mounting portion main body.
The mounting member includes an outer edge flat portion, a locking portion including a short tapered annular portion that is elastically deformable and extends from the inner side of the outer edge flat portion toward the center and obliquely forward of the outer edge flat portion, and the locking portion. An insertion hole formed by the end of the
The mounting portion main body has a lumen that allows the shaft to enter until the outer edge flat portion of the mounting member is held and the small-diameter portion of the shaft is engaged with the insertion hole. Have
The diameter of the insertion hole of the mounting member is smaller than the outer diameter of the bulging portion of the shaft and is substantially equal to or slightly larger than the outer diameter of the small diameter portion,
The lumen of the mounting portion main body is larger than the maximum outer diameter portion of the shaft that has entered the mounting portion main body in a state where the small diameter portion of the shaft is engaged with the insertion hole. ,
The joint member is characterized in that the tip of the shaft is attached to the attachment member of the joint member when the shaft is pushed in from the rear side.   The joint member according to claim 1, wherein the locking portion of the mounting member is formed by a plurality of locking claws, and the insertion hole is formed by free ends of the plurality of locking claws.   The engaging portion of the mounting member includes a plurality of slits formed in the tapered annular portion, and the slit extends from the tip of the tapered annular portion to the vicinity of the boundary portion with the outer edge flat portion. The joint member according to claim 1.   The joint member according to claim 1, wherein the mounting member has a disk shape.   The insertion hole has a substantially elliptical shape having a minor axis and a major axis, and the major axis is smaller than the outer diameter of the bulged portion of the shaft and slightly larger than the outer diameter of the small-diameter portion. The joint member according to any one of claims 1 to 4.   The insertion hole has a substantially elliptical shape having a minor axis and a major axis, and the minor axis is smaller than the outer diameter of the bulged portion of the shaft and is substantially the same as or slightly smaller than the outer diameter of the small-diameter portion. The joint member according to any one of claims 1 to 5, wherein the joint member is small. A movable member for attachment to a shaft that is attached to a shaft that is moved in the axial direction and is driven by the shaft,
The shaft includes a columnar main body portion and a front end portion formed on a front end side of the main body portion, and the front end portion includes a small diameter portion and a bulging portion formed on a front end side of the small diameter portion. Part,
The mounting movable member includes a movable member main body, and a mounting member held by the movable member main body,
The mounting member is formed by an outer edge flat part, an elastically deformable locking part extending from the inner side of the outer edge flat part toward the center and obliquely forward of the outer edge flat part, and an end of the locking part. Having an insertion hole,
The movable member main body retains the outer edge flat portion of the mounting member and allows the shaft to enter until the small diameter portion of the shaft is engaged with the insertion hole. Have
The diameter of the insertion hole of the mounting member is smaller than the outer diameter of the bulging portion of the shaft and is substantially equal to or slightly larger than the outer diameter of the small diameter portion,
The lumen of the movable member main body is larger than the maximum outer diameter portion of the shaft that has entered the movable member main body in a state where the small diameter portion of the shaft is engaged with the insertion hole. And
The mounting movable member can be mounted on a shaft, wherein the distal end portion of the shaft can be mounted on the mounting member of the mounting movable member by pushing the shaft from the rear side. Element.   The movable member for mounting on the shaft according to claim 7, wherein the movable member for mounting on the shaft includes a valve body.     The movable member main body of the movable member for mounting on the shaft includes a movable member main body and a joint member fixed to the movable member. The joint member includes an attachment main body, and the mounting member The movable member for mounting to the shaft according to claim 7, which is held by the mounting portion main body.   The movable member for mounting on a shaft according to claim 9, wherein the joint member is the joint member according to claim 1.   The movable member for mounting on a shaft according to claim 9 or 10, wherein the attachment portion main body is welded to the movable member main body.   The shaft mounting according to any one of claims 9 to 11, wherein the mounting movable member includes a valve body, the joint member is stored, and a housing portion that encapsulates the distal end side. Movable member. A shaft-coupled movable body comprising a shaft that is moved in the axial direction and a movable member that is attached to the shaft that is attached to the shaft,
The shaft includes a columnar main body portion and a front end portion formed on a front end side of the main body portion, and the front end portion includes a small diameter portion and a bulging portion formed on a front end side of the small diameter portion. Part,
The mounting movable member includes a movable member main body, and a mounting member held by the movable member main body,
The mounting member is formed by an outer edge flat part, an elastically deformable locking part extending from the inner side of the outer edge flat part toward the center and obliquely forward of the outer edge flat part, and an end of the locking part. Having an insertion hole,
The movable member main body retains the outer edge flat portion of the mounting member and allows the shaft to enter until the small diameter portion of the shaft is engaged with the insertion hole. Have
The diameter of the insertion hole of the mounting member is smaller than the outer diameter of the bulging portion of the shaft and is substantially equal to or slightly larger than the outer diameter of the small diameter portion,
The inner cavity of the movable member main body portion is larger than the maximum outer diameter portion of the shaft that has entered the attachment portion main body in a state where the small diameter portion of the shaft is engaged with the insertion hole. And
The shaft-coupled movable body is characterized in that the tip portion of the shaft is attached to the attachment member of the attachment-use movable member when the shaft is pushed in from the rear side.   The shaft-connecting movable body according to claim 13, wherein the movable member for mounting on the shaft is a movable member for mounting on the shaft according to claim 7.   The joint member according to any one of claims 1 to 6, further comprising a tapered portion that gradually increases in diameter from the small diameter portion toward the shaft proximal end side on the proximal end side of the small diameter portion of the shaft. Item 15. A movable member for mounting on a shaft according to any one of items 7 to 12, or a shaft-coupled movable body according to claim 13 or 14.   The joint member according to claim 15, wherein the angle of one side of the tapered portion of the shaft is 10 ° to 70 ° with respect to the shaft center of the shaft, or the movable member for mounting on the shaft or the shaft-coupled movable body.   17. The joint member according to claim 1, wherein an outer diameter of the bulging portion is 0.05 mm to 0.4 mm larger than an outer diameter of the small diameter portion. The movable member for attachment to the shaft in any one of thru | or 12, 15 or 16, or the shaft coupling movable body in any one of Claims 13 thru | or 16.   The inner diameter of the insertion hole is 0.05 mm to 0.4 mm smaller than the outer diameter of the bulging portion, and is the same as or larger than the outer diameter of the small diameter portion. A joint member according to any one of claims 6 to 15, 15 to 17, a movable member for mounting on a shaft according to any one of claims 7 to 12, 15 to 17, or a shaft according to any one of claims 13 to 17. Connected movable body.

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