JP7105020B1 - fluid coupling - Google Patents

Abstract

A fluid coupling capable of one-touch connection without manipulating a sleeve, and preventing internal fluid from leaking to the outside by interlocking a plug body and a slide valve, and a slide to the socket body. To provide a fluid coupling with which a valve can be easily attached. A fluid coupling (1) includes a plug (2) and a socket (3) that engages with the plug (2). An interlocking means 10e for connecting the plug body 10 and the slide valve 70 when the plug 2 is inserted into the socket 3, and for releasing the connection between the plug body 10 and the slide valve 70 when the plug 2 is removed from the socket 3. , 73, 52b. The tip of the slide valve 70 extends beyond the steel ball 53 toward the tip of the socket body 50 . A steel ball 53, interlocking means 10e, 73, 52b, and a stop ring 54 are arranged in this order from the plug insertion side end face of the socket 3. As shown in FIG. [Selection drawing] Fig. 1

Description

The present invention relates to fluid couplings.

Patent Literature 1 discloses a fluid coupling 101 including a plug 102 and a socket 103, as shown in FIG. The plug 102 includes a plug body 104, a movable valve 105, and a plug spring 106 that biases the movable valve 105 toward the tip side. The socket 103 is accommodated in a socket main body 107, a fixed valve 108, a slide valve 109, a socket spring 110 that biases the slide valve 109 toward the tip side, and a steel ball locking hole 107a of the socket main body 107. It comprises a steel ball 111 and a sleeve 112 for engaging and disengaging the steel ball 111 with the outer peripheral groove 104 a of the plug body 104 . In the fluid coupling 101 of Patent Document 1, it is not necessary to operate the sleeve 112 when connecting the plug 102 to the socket 103, and the connection can be made with a single touch.

In the fixed valve 108 of the socket 103 of the fluid coupling 101 of Patent Document 1, the male thread 108a formed at the rear end of the fixed valve 108 is inserted into the central hole 113a of the bottom portion 113 provided in the intermediate portion of the socket body 107. It is fixed with a nut 114 . Around the central hole 113a of the bottom portion 113, an elongated hole opening 113b is provided as a passage for the internal fluid. In this fixing structure of the fixed valve 108, the socket body 107 has the bottom portion 113 in the middle portion and does not penetrate cylindrically. Can not. In addition, when machining the inner surface of the socket body 107, the tool must be inserted and removed many times to remove cutting waste, which requires a very long machining time. Furthermore, a processing machine such as a machining center must be used to form the long hole opening 113b of the bottom portion 113, which takes a long time.

The movable valve 105 of the plug 102 of the fluid coupling 101 of Patent Document 1 is fixed by means different from the fixed valve 108 . That is, the movable valve 105 is a stop ring in which the rear end of the fixed valve 105 is inserted into a cylindrical valve holder 115 so as to be slidable in the axial direction, and the valve holder 115 is mounted on the inner peripheral surface of the plug body 104 . 116 prevents it from coming off rearward. Since the movable valve 105 and the fixed valve 108 have different fixing means, the types and number of parts are doubled, resulting in an increase in cost.

Patent Document 2 discloses a fluid coupling 201 having a structure similar to that of Patent Document 1, as shown in FIG. The fluid coupling 201 has interlocking means for interlocking the plug body 204 and the slide valve 209 of the socket 203 . This interlocking means includes a connecting ball 213 housed in a hole 209a formed in the slide valve 209, an engaging portion 204a formed on the outer peripheral surface of the plug body 204, and a relief groove 207a formed on the inner peripheral surface of the socket body 207. When the plug 202 is inserted into the socket 203, the connecting ball 213 engages with the engaging portion 204a of the plug body 207 to connect the plug body 204 and the slide valve 209, and the plug 202 is separated from the socket 203. At this time, the connecting ball 213 is retracted into the escape groove 207a of the socket body 207 to release the connection between the plug body 204 and the slide valve 209, thereby preventing the internal fluid from leaking to the outside. It's becoming

In the fluid coupling 201 of Patent Document 2, a stop ring 214 that stops the slide valve 209 that is biased toward the distal end of the socket body 207 by a socket spring 210 is positioned between the steel ball 211 and the escape groove 207a in the socket body 207. Provided on the inner peripheral surface, the tip of the slide valve 209 is engaged with the stop ring 214 . In this structure, the tip of the slide valve 209 is locked to the stop ring 214 and cannot extend to the steel ball 211 located on the tip side of the stop ring 214. It is not possible to adopt a structure in which one-touch connection is made without operating the .

In the fluid coupling 201 of Patent Document 2, when the slide valve 209 is inserted into the socket body 207 during assembly, it cannot be inserted if the stop ring 214 is present. 214 must be mounted on the inner peripheral surface of the socket body, and the slide valve 209 and stop ring 214 cannot be mounted at the same time. In addition, when the stop ring 214 is attached, the slide valve 209 must be pressed inwardly against the biasing force of the socket spring 210, so the attachment of the stop ring 214 is difficult.

Therefore, as shown in FIG. 15(a), the stop ring 214 is provided behind the escape groove 207a so that the locking portion 207b provided on the inner peripheral surface of the socket body 207 is locked to the stop ring 214. It is also possible to However, in this structure, as shown in FIG. There is a problem that the stop ring 214 held in the slide valve 209 falls into the escape groove 207a and hinders the deep insertion of the slide valve 209.

JP 2013-68286 A Japanese Patent Application Laid-Open No. 2004-251446 (Patent No. 3931176)

The present invention has been made in view of the conventional problems described above. Fluid couplings that can prevent internal fluid from leaking to the outside, fluid couplings that allow easy attachment of a slide valve to the socket body, and easy fixing of plug and socket valves, reducing manufacturing costs through common use of parts. An object of the present invention is to provide a fluid coupling that can reduce the cost.

As a means for solving the above problems, the present invention
(1) comprising a plug and a socket that engages the plug;
The plug is
a cylindrical plug body provided with an outer peripheral groove;
a movable valve provided inside the plug body and movable relative to the plug body in an axial direction;
a plug spring that biases the movable valve toward the distal end of the plug body;
with
The socket is
a cylindrical socket body having a steel ball holding hole on its outer peripheral surface;
a steel ball held in the steel ball holding hole of the socket body so as to protrude inside the socket body and engage with the outer peripheral groove of the plug;
a fixed valve fixed inside the socket body;
a cylindrical slide valve axially movable relative to the fixed valve;
a stop ring that regulates the position of the slide valve so that the slide valve does not protrude from the tip side of the socket body;
a socket spring that biases the slide valve to contact the stop ring;
a sleeve movable between a holding position in which the steel ball protrudes inside the socket body and a retracted position in which the steel ball is retracted from the inside of the socket body, and is urged toward the holding position;
with
an interlocking means for connecting the plug body and the slide valve when the plug is inserted into the socket, and for releasing the connection between the plug body and the slide valve when the plug is removed from the socket; In a fluid coupling comprising
the tip of the slide valve extends beyond the steel ball toward the tip of the socket body,
The steel ball, the interlocking means, and the stop ring are arranged in this order from the plug insertion side end face of the socket.

In this solution, the tip of the slide valve extends beyond the steel ball to the tip side of the socket body, and the steel ball is retracted from the inner surface of the socket body, so that the sleeve is manipulated when connecting the plug to the socket. You can connect with just one touch. In addition, since the steel ball, the interlocking means, and the stop ring are arranged in this order from the plug insertion side end face of the socket, the stop ring is arranged on the far side of the slide valve, and the interlocking means is brought closer to the steel ball side. It can be provided at a position that can be interlocked with the plug body. As a result, when connecting the plug to the socket, it is possible to connect with one touch without operating the sleeve, and by interlocking the plug body and the slide valve, it is possible to prevent the internal fluid from leaking to the outside. You can demonstrate both functions that can be done.

(2) the interlocking means,
a connecting groove provided on the outer peripheral surface of the plug body;
a holding hole provided in the slide valve;
a connecting ball held in the holding hole so as to protrude inside the slide valve and engage with the outer peripheral groove of the plug body;
a relief groove formed on the inner peripheral surface of the socket body for retracting the connecting ball;
with
A stop ring receiving groove having a groove diameter smaller than the outer diameter of the stop ring and receiving the stop ring is provided on the inner peripheral surface of the socket body,
On the plug insertion side of the stop ring receiving groove, there is a tip inner diameter portion having the same inner diameter as the stop ring receiving groove, and an inclined step where the inner diameter decreases from the tip inner diameter portion toward the stop ring receiving groove. provided,
It is characterized in that the relief groove of the interlocking means is formed in the inner diameter portion of the distal end.
(3) It is preferable that the holding holes are provided at three equidistant positions in the circumferential direction of the slide valve, three connecting balls are provided, and one ball is held in each of the holding holes.

In this solution, the tip inner diameter portion having the same inner diameter as the stop ring receiving groove is provided on the plug insertion side of the stop ring receiving groove, and the relief groove for the interlocking means is formed in the tip inner diameter portion. 2. When the slide valve is attached to the socket body, the stop ring held by the slide valve does not fall into the relief groove of the socket body. In addition, since an inclined step is provided on the plug insertion side of the stop ring receiving groove, when the slide valve is attached to the socket body, the stop ring held by the slide valve slides over the inclined step and the stop ring Mounted in the receiving groove. Therefore, the slide valve can be easily attached to the socket body.
In addition, by distributing the connecting balls evenly over three circumferences, it is possible to prevent the connecting balls from biting into the socket body and tilting of the slide valve when the plug is pulled out. can be pulled out.

(4) A chamfer is provided on the far side edge of the escape groove.
With this solution, even if the stop ring held by the slide valve slightly falls into the relief groove of the socket body when the slide valve is attached to the socket body, the inner edge of the relief groove is chamfered. , the escape groove can be easily overcome.

(5) The stop ring is chamfered at an inner peripheral corner portion thereof.
With this solution, when the slide valve is attached to the socket body, even if the stop ring held by the slide valve slightly falls into the escape groove of the socket body, the stop ring is chamfered at the far side outer peripheral corner. can easily get over the escape groove.

(6) a fixed valve receiver for fixing the fixed valve inside the socket body;
The fixed valve receiver has a base portion having a hole fitted to the rear end of the fixed valve, and a pair of arms extending radially outward from the base portion,
The base is attached to the rear end of the fixed valve and is retained in the axial direction,
The arm portion is fixed by being sandwiched between a stepped portion formed on the inner peripheral surface of the socket body and a stopper provided on the inner peripheral surface of the socket body.

According to this solution, the fixed valve receiver is attached to the rear end of the fixed valve to prevent it from coming off, and can be fixed to the socket body simply by sandwiching it between the stepped portion and the valve receiver stop ring. Therefore, it is only necessary to provide the socket body with the stepped portion and the valve receiving stop ring, so that the fixed valve can be easily attached to the socket body.

(7) a valve holder for axially slidably holding the movable valve;
A movable valve receiver is provided to fix the valve holder inside the plug body,
The movable valve receiver has a base portion having a hole fitted to the rear end of the valve holder, and a pair of arms extending radially outward from the base portion,
an end face of the base on the tip side abuts against a step formed on the outer peripheral surface of the valve holder;
A rear end face of the arm portion is in contact with a stopper provided on an inner peripheral surface of the plug body.

According to this solution, the movable valve receiver can be fixed simply by contacting the stepped portion of the valve holder and the valve holder stop ring of the plug body. Therefore, it is easy to attach the slide valve to the plug body. In addition, the movable valve receiver can be made to have the same shape as the fixed valve receiver, and the manufacturing cost can be reduced by using common parts.

(8) a small-diameter portion having a smaller diameter than the rear end of the plug spring is provided at the rear end of the plug spring;
A movable valve receiver is provided for fixing the small diameter portion of the plug spring inside the plug body,
The movable valve receiver has a base portion having a hole to be fitted into the small diameter portion of the plug spring, and a pair of arm portions extending radially outward from the base portion,
an end surface of the base on the tip side contacts the rear end of the plug spring,
A rear end face of the arm portion is in contact with a stopper provided on an inner peripheral surface of the plug body.

According to this solution, there is no valve holder, and the small-diameter portion at the rear end of the plug spring is directly fixed to the movable valve receiver, so the number of parts can be reduced and the manufacturing cost can be reduced.

(9) an extension extending in the axial direction of the plug spring at the rear end of the plug spring;
a spring seat into which the extended portion of the plug spring is inserted;
A movable valve receiver is provided to fix the spring seat inside the plug body,
The movable valve receiver has a base portion having a hole fitted to the protrusion of the spring seat, and a pair of arms extending radially outward from the base portion,
an end surface of the base on the tip side contacts the spring seat,
A rear end face of the arm portion is in contact with a stopper provided on an inner peripheral surface of the plug body.

According to this solution, since there is no valve holder and the extension of the rear end of the plug spring is directly fixed to the movable valve receiver via the spring seat, the weight is reduced and the manufacturing cost can be reduced.

According to the first aspect of the invention, it is possible to easily fix the bulb of the plug and the socket, and to reduce the manufacturing cost by using common parts.

According to the invention of claim 2, there is no valve holder, the number of parts is reduced, and the manufacturing cost can be reduced.

According to the invention of claim 3 , there is no valve holder, the number of parts is reduced, and the manufacturing cost can be reduced.

According to the fourth aspect of the invention, when connecting the plug to the socket, the plug can be connected with a single action without operating the sleeve. Leakage can be prevented.

According to the inventions of claims 5 to 8 , the slide valve can be easily attached to the socket body .

1 is a half-sectional view of a plug and socket of a fluid coupling according to an embodiment of the present invention; FIG. A half cross-sectional view of the plug and socket when they are coupled. Fig. 4 is a half-sectional view of the slide valve and the socket body before inserting the slide valve into the socket body; The figure seen from each rear-end side of a plug and a socket. The front view and sectional drawing of a movable valve|bulb receiver. Front view of fixed valve receiver and E-shaped ring. The front view of a stop ring. Sectional drawing which shows the condition which inserts a slide valve in a socket main body. FIG. 4 is an enlarged cross-sectional view showing a state in the middle of inserting the slide valve into the socket body; Sectional drawing which shows the state in the middle of fastening a plug and a socket. Sectional drawing which shows the modification of the holding structure of the movable valve of a plug. FIG. 5 is a cross-sectional view showing another modification of the structure for holding the movable valve of the plug. A semi-sectional view (a) of a conventional fluid coupling, and a view (b) seen from the rear end side of the socket. FIG. 2 is a half-sectional view of another conventional fluid coupling; Fig. 10(a) is a half sectional view of a socket of still another conventional fluid coupling, and sectional views (b, c) showing a situation where the slide valve is inserted into the socket body.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1, the fluid coupling 1 of this embodiment comprises a plug 2 and a socket 3 that engages the plug 2 at its tip. In the following description, the side of the plug 2 that engages with the socket 3 may be referred to as the front end side, and the side of the plug 2 connected to the pipe may be referred to as the rear end side. Similarly, the side of the socket 3 that engages with the plug 2 may be referred to as the front end side, and the side of the socket 3 connected to the pipe may be referred to as the rear end side.

The plug 2 includes a plug body 10 , a movable valve 20 that can move relative to the plug body 10 , a valve holder 30 that supports the movable valve 20 , and a movable valve 20 that elastically moves toward the tip of the plug 2 . and a spring 40 that biases against.

The plug body 10 has a cylindrical shape with a channel formed on the inner surface. The plug body 10 is provided with a valve seat 10a on the inner surface of the tip end (the left end in FIG. 1). The plug body 10 has a plug inner peripheral groove 10b formed in the inner surface of the rear end side (right side in FIG. 1) of the valve seat 10a. A stopper 11, such as an occluded ring, which restricts movement of the valve holder 30 toward the rear end, is mounted in the plug inner peripheral groove 10b. The plug body 10 is provided with a female thread 10c on the inner surface of the rear end (the right end in FIG. 1), and the female thread 10c screw-couples the plug body 10 to a pipe (not shown). The plug body 10 is provided with a plug peripheral groove 10d and a connecting groove 10e on its outer surface. The plug body 10 is provided with a hexagonal head 10f on the outer surface of the end on the rear end side, and the hexagonal head 10f is adapted to be spanned.

The movable valve 20 has a valve head 21 and a valve shaft 22 . The end surface of the valve head 21 on the distal end side is a flat surface. A seal groove 21 a is formed on the outer surface of the valve head 21 . A seal member 23 such as an O-ring is attached to the seal groove 21a. The valve head 21 has a protrusion 21b that engages with the valve seat 10a of the plug body 10 on the outer surface on the rear end side (right side in FIG. 1) of the seal groove 21a. When the projection 21b of the movable valve 20 and the valve seat 10a of the plug body 10 are in contact with each other, as shown in FIG. are flush with each other. A hole 22a into which a valve holder is inserted is formed in the rear end face of the valve shaft 22. As shown in FIG.

The valve holder 30 includes a circular base portion 31, a support portion 32 projecting from the base portion 31 toward the front end side and having a diameter smaller than that of the base portion 31, and a fixing portion 33 projecting from the base portion 31 toward the rear end side and having a diameter smaller than that of the base portion 31. The support portion 32 of the valve holder 30 is inserted into the hole 22a of the valve shaft 22 of the movable valve 20 so that the movable valve 20 can move in the axial direction. A movable valve receiver 34 is attached to the fixed portion 33 of the valve holder 30 . As shown in FIG. 5, the movable valve receiver 34 is plate-shaped and has an annular base portion 34b having a hole 34a into which the fixed portion 33 of the valve holder 30 is fitted, and extends radially outward from the base portion 34b. and a pair of arm portions 34c. The pair of arm portions 34c are in contact with the distal end face of the stopper 11 of the plug body 10. As shown in FIG.

The spring 40 has its tip end (left end in FIG. 1) in contact with the protrusion 21b of the valve head 21 of the movable valve 20, and its rear end (right end in FIG. 1). ) is in contact with the base portion 31 of the valve holder 30 . The spring 40 is installed in a compressed state between the projection 21 b of the valve head 21 of the movable valve 20 and the base 31 of the valve holder 30 , and the valve head 21 of the movable valve 20 engages the valve seat 10 a of the plug body 10 . It is elastically biased so as to The spring 40 restricts movement of the base portion 31 of the valve holder 30 toward the tip side.

The socket 3 includes a socket body 50, a fixed valve 60 fixed inside the socket body 50, a slide valve 70 axially movable between the socket body 50 and the fixed valve 60, and a slide valve A spring 80 for elastically biasing the socket 70 toward the distal end side of the socket 3 and a sleeve 90 attached to the outside of the socket body 50 are provided.

Referring to FIG. 3, the socket body 50 has a cylindrical shape with a channel formed on the inner surface. The socket body 50 has an inner diameter slightly larger than the outer diameter of the plug 2 so that the plug 2 (shown in FIG. 1) can be inserted at the inner circumference of the tip end (right end in FIG. 3). It has a first inner diameter portion 51a, a second inner diameter portion 51b smaller in diameter than the first inner diameter portion, and a third inner diameter portion 51c smaller in diameter than the second inner diameter portion. An inclined step 51d is provided between the first inner diameter portion 51a and the second inner diameter portion 51b so that the inner diameter decreases from the first inner diameter portion 51a toward the second inner diameter portion 51b. A stepped portion 51e is provided on the tip side of the third inner diameter portion 51c, that is, between the third inner diameter portion 51c and the second inner diameter portion 51b, and a stepped portion 51f is provided on the rear end side of the third inner diameter portion 51c. is provided.

The socket body 50 is provided with a plurality of steel ball holding holes 52a at the tip end. A steel ball 53 is accommodated in the steel ball holding hole 52a. An escape groove 52b is formed in the inner surface of the first inner diameter portion 51a of the socket body 50, close to the rear end side of the steel ball holding hole 52a, in which a connection ball 73, which will be described later, can escape.

The socket body 50 has a stop ring receiving groove 52c formed in the inner surface of the second inner diameter portion 51b on the rear end side (left side in FIG. 2) of the steel ball holding hole 52a, the escape groove 52b, and the inclined step 51d. A stop ring 54 (shown in FIG. 1), which is a square wire ring made of metal, is mounted in the stop ring receiving groove 52c. A socket inner peripheral groove 52d is formed on the rear end side of the stepped portion 51f of the third inner diameter portion 51c of the socket body 50 . A stopper 55, such as an occluded ring, is mounted in the socket inner peripheral groove 52d to restrict the movement of the fixed valve 60 to the rear end side. The socket body 50 is provided with a female screw 52e on the inner surface of the end on the rear end side, and is threadedly connected to a pipe (not shown) by the female screw 52e.

The socket main body 50 is provided with a socket outer peripheral groove 52f on the outer surface of the end on the tip side. A stop ring 56 such as a segmented circle ring is mounted in the socket outer circumferential groove 52f. The socket body 50 is provided with a width across flats 52g on the outer surface of the end portion on the rear end side, and the width across flats 52g is adapted to be spanned.

Here, Da is the inner diameter of the first inner diameter portion 51a of the socket body, dD is the inner diameter of the second inner diameter portion 51b, Dc is the inner diameter of the stop ring receiving groove 52c, and the outer diameter of the stop ring 54 mounted in the stop ring receiving groove 52c is Assuming that the diameter is D, the inner diameter Da of the first inner diameter portion 51a is equal to or larger than the outer diameter of the stop ring 54 (Da≧D). Therefore, when the slide valve 70 is inserted into the socket body 50, the stop ring 54 attached to the slide valve 70 can pass through the first inner diameter portion 51a. The inner diameter Dc of the stop ring receiving groove 52c is substantially equal to the inner diameter Da of the first inner diameter portion 51a (Dc≈Da) and smaller than the outer diameter D of the stop ring 54 (Dc≤D).

Referring to FIG. 1, fixed valve 60 comprises valve head 61 and valve stem 62 . The end face on the distal end side of the valve head 61 is a flat face. A seal groove 61 a is formed on the outer surface of the valve head 61 . A seal member 63 such as an O-ring is attached to the seal groove 61a. The end face of the valve head 61 of the fixed valve 60 on the distal end side is located on the rear end side with respect to the distal end of the socket body 50 . A fixed portion 60 a having a diameter smaller than that of the valve shaft 62 is provided at the rear end portion of the fixed valve 60 . A fixed valve receiver 64 is attached to the fixed portion 60 a of the fixed valve 60 with an E-shaped ring 65 . As shown in FIG. 6, the fixed valve receiver 64 is a plate having the same shape as the movable valve receiver 34, and includes an annular base portion 64b having a hole 64a to be fitted in the fixed portion 60a of the fixed valve 60, and a base portion 64b. and a pair of arms 64c extending radially outwardly from 64b. The pair of arm portions 64 c abut on the distal end side of the stopper 55 of the socket body 50 .

The slide valve 70 is cylindrical. As shown in FIG. 3, the slide valve 70 is provided with a tapered portion 71a on the inner surface of the end portion on the tip side so that the inner diameter increases toward the tip side. The slide valve 70 is provided with a plurality of holding holes 71b at the rear end side of the tapered portion 71a, and at three equidistant positions (120° intervals). A connecting ball 73 that can be engaged with the connecting groove 10e and retractable into the escape groove 52b of the socket body 50 is held in the holding hole 71b. A total of three connecting balls 73 are held in each holding hole 71b. The slide valve 70 has a seal groove 71c formed on the inner surface on the rear end side of the tapered portion 71a. It is installed as a sealing member between The slide valve 70 has a protrusion 71d on the inner surface on the rear end side of the seal groove 71c, which abuts on the seal member 63 attached to the fixed valve 60 as shown in FIG.

The slide valve 70 has a first outer diameter portion 72a on the outer surface of the end on the front end side and a second outer diameter portion 72b on the outer surface of the end on the rear end side. Between the first outer diameter portion 72a and the second outer diameter portion 72b, a third outer diameter portion 72c is provided on the rear end side of the first outer diameter portion 72a, and a fourth outer diameter portion 72c is provided on the front end side of the second outer diameter portion 72b. An outer diameter portion 72d is provided.

The first outer diameter portion 72a has an outer diameter slightly smaller than the inner diameter of the first inner diameter portion 51a of the socket body 50, and is configured to be slidably fitted to the socket body 50. As shown in FIG. The holding hole 71b described above is opened in the first outer diameter portion 72a. The first outer diameter portion 51a, that is, the tip of the slide valve 70 extends beyond the steel ball 53 toward the tip of the socket body 50 when the slide valve 70 is attached to the socket body 50, as shown in FIG. ing.

The second outer diameter portion 72b has an outer diameter slightly smaller than the inner diameter of the second inner diameter portion 51b of the socket body 50, and is configured to be slidably fitted to the socket body 50. As shown in FIG. A seal groove 72e is formed in the second outer diameter portion 72b, and a seal member 75 such as an O-ring is mounted in the seal groove 72e. The seal member 75 is in slidable contact with the second inner diameter portion 50b of the socket body 50 .

The third outer diameter portion 72c has the same outer diameter as the second outer diameter portion 72b.

The fourth outer diameter portion 72d has an outer diameter smaller than that of the second outer diameter portion 71b and the third outer diameter portion 72c. A stop ring receiving groove 72f for receiving the stop ring 54 when the slide valve 70 is attached to the socket body 50 is formed at the front end portion of the fourth outer diameter portion 72d. The diameter of the bottom of the stop ring accommodating groove 72f is smaller than the inner diameter of the stop ring 54 when the outer diameter is reduced to the inner diameter of the socket body 50 or less.

The slide valve 70 is elastically attached so that a stepped portion 72g between the second outer diameter portion 71b and the fourth outer diameter portion 71d contacts the stop ring 54 by a spring 80 (shown in FIG. 1), which will be described later. are being forced. Here, the protrusion 71d and the seal groove 71c of the slide valve 70 are provided at different positions in the axial direction of the slide valve 70. As shown in FIG.

The spring 80 has an end on the front end (right end in FIG. 1) in contact with the projection 71d of the slide valve 70, and an end on the rear end (left end in FIG. 1) on the socket body. 50 is in contact with the stepped portion 51e. The spring 80 is installed in a compressed state between the projecting portion 71d of the slide valve 70 and the step portion 51e of the socket body 50, and is arranged between the second outer diameter portion 71b and the fourth outer diameter portion 71d of the slide valve 70. The slide valve 70 is elastically biased so that the stepped portion 72g contacts the stop ring 54. As shown in FIG.

Referring to FIG. 1, the sleeve 90 is attached to the distal end of the socket body 50 . The sleeve 90 is provided with a sleeve inner peripheral groove 90a at the tip end (the right end in FIG. 1). The sleeve 90 is elastically biased toward the stop ring 56 of the socket body 50 by a spring 91 arranged in compression between the sleeve 90 and the socket body 50 .

When the sleeve 90 is in contact with the stop ring 56 of the socket body 50 , the steel balls 53 are pressed against the inner surface of the sleeve 90 and protrude into the socket body 50 . When the sleeve 90 moves toward the rear end of the socket body 50 against the biasing force of the spring 91 , the steel ball 53 can be retracted into the sleeve inner peripheral groove 90 a of the sleeve 90 . Here, the position of the sleeve 90 when the steel ball 53 protrudes from the steel ball holding hole 52a to the inner surface of the socket body 50 is called the holding position, and when the steel ball 53 can be retracted into the sleeve inner peripheral groove 90a of the sleeve 90. position of the sleeve 90 is called a retracted position. Since the tip of the slide valve 70 extends beyond the steel ball 53 to near the tip of the socket body 50, the steel ball 53 cannot protrude into the inner surface of the socket body 50 and moves into the sleeve inner peripheral groove 90a. Thus, the sleeve 90 is maintained in the retracted position.

Next, a method of inserting the slide valve 70 of the socket 3 into the socket body 50 will be described with reference to FIG.

The slide valve 70 is inserted into the socket body 50 from the distal end side of the socket body 50 using an insertion jig 95, as shown in FIG. 8(a). The insertion jig 95 has the same inner diameter as the first inner diameter portion 51a of the socket body 50 so that the slide valve 70 is slidably inserted. A tapered portion 95a is formed on the inner surface of the insertion jig 95 on the inlet side, and a protrusion 95b that engages with the tip end surface of the socket body 50 is formed on the outlet side.

First, the seal member 74, the seal member 75 and the connecting ball 73 are accommodated in their respective positions in the slide valve 70, the stop ring 54 is accommodated in the stop ring accommodation groove 72f, and the spring 80 is accommodated inside. Subsequently, the slide valve 70 is inserted from the inlet side of the insertion jig 95 , the outlet side of the insertion jig 95 is engaged with the distal end surface of the socket body 50 , and the slide valve 70 is moved toward the inside of the socket body 50 . insert.

The inner diameter Da of the first inner diameter portion 51a of the socket body 50 is equal to or greater than the outer diameter of the stop ring 54 (Da≧D). Therefore, as shown in FIG. 8B, when the slide valve 70 is inserted into the socket body 50, the stop ring 54 received in the stop ring receiving groove 72f of the slide valve 70 will 51a and passes through without falling into the escape groove 52b formed in the first inner diameter portion 51a. As shown in FIG. 8(c), when the stop ring 54 reaches the inclined step 51d, the stop ring 54 rides on the inclined step 51d while reducing its diameter, and moves to the second inner diameter portion 51b. The stop ring 54 can be reduced in diameter within the stop ring accommodating groove 72f. On the other hand, the end of the spring 80 on the insertion side comes into contact with the stepped portion 51e of the socket body 50 and is compressed as the slide valve 70 is inserted.

As shown in FIG. 8(d), when the stop ring 54 passes the inclined step 51d and the axial positions of the stop ring receiving groove 72f of the slide valve 70 and the stop ring receiving groove 52c of the socket body 50 are aligned, The stop ring 54 is mounted in the stop ring receiving groove 52c with its diameter expanded. Here, the inner diameter Dc of the stop ring receiving groove 52c is substantially equal to the inner diameter Da of the first inner diameter portion 51a (Dc≈Da) and smaller than the outer diameter D of the stop ring 54 (Dc≤D). Therefore, the stop ring 54 is securely attached to the stop ring receiving groove 52c without rattling.

When the stop ring 54 is fitted into the stop ring receiving groove 52c, the insertion of the slide valve 70 is stopped. As a result, as shown in FIG. 8(e), the slide valve 70 is pushed back by the biasing force of the spring 80, and the stepped portion 72g of the slide valve 70 comes into contact with the stop ring 54 and stops. This completes the mounting of the slide valve 70 .

The fixed valve 60 and the sleeve 90 may be fixed to the socket body 50 after the slide valve 70 is inserted into the socket body 50, and the spring 80 may be arranged inside the socket body 50 in advance.

Further, as shown in FIG. 9, a chamfer 57 consisting of a slope may be provided on the far side edge of the relief groove 52b so that the stop ring 54 is not caught on the edge of the relief groove 52b. As a result, when the slide valve 70 is attached to the socket body 50, even if the stop ring 54 held by the slide valve 70 slightly falls into the escape groove 52b of the socket body 50, the chamfer 57 is formed on the far side edge of the escape groove 52b. is provided, the escape groove 52b can be easily overcome.

Similarly, the stop ring 54 may be provided with a chamfer 54a formed of a round surface at the far side outer peripheral corner. As a result, when the slide valve 70 is attached to the socket body 50, even if the stop ring 54 held by the slide valve 70 slightly falls into the escape groove 52b of the socket body 50, the inner peripheral corner of the stop ring 54 does not move. Since the chamfer 54a is provided, the escape groove 52b can be easily overcome.

In this embodiment, a first inner diameter portion 51a having the same inner diameter as the stop ring receiving groove 52c is provided on the plug insertion side of the stop ring receiving groove 52c. 52b is formed, when the slide valve 70 is attached to the socket body 50, the stop ring 54 held by the slide valve 70 does not drop into the relief groove 52b of the socket body 50. - 特許庁Further, since the inclined step 51d is provided on the plug insertion side of the stop ring receiving groove 52c, when the slide valve 70 is attached to the socket body 50, the stop ring 54 held by the slide valve 70 slides on the inclined step 51d. It is mounted on the stop ring receiving groove 52c by moving over it. Therefore, the slide valve 70 can be easily attached to the socket body 50 .

Next, with reference to FIG. 10, the operation of attaching and detaching the fluid coupling 1 will be described.
When connecting the plug 2 and the socket 3, since the sleeve 90 of the socket 3 is already in the retracted position, it is not necessary to operate the sleeve 90, and the connection can be made with one touch.

As the plug 2 is inserted into the socket 3, the plug 2 enters along the inner surface of the slide valve 70 from the tapered portion 71a, as shown in FIG. 10(a).

As shown in FIG. 10(b), when the plug body 10 comes into contact with the seal member 74 of the slide valve 70, the connecting ball 73 is engaged with the escape groove 52b of the socket body 50, so that the plug body 10 pushes the slide valve 70 through the seal member 74, the slide valve 70 does not move. As a result, the sealing between the fixed valve 60 and the slide valve 70 is maintained by the sealing member 63, and the sealing between the movable valve 20 and the plug body 10 is maintained by the sealing member 23, so that the internal fluid does not leak.

As the plug 2 is further inserted, the movable valve 20 of the plug 2 and the fixed valve 60 of the socket 3 come into contact as shown in FIG. 10(c). In this state, the connecting groove 10e of the plug body 10 is aligned with the connecting ball 73 in the axial direction, and the connecting ball 73 can move into the connecting groove 10e of the plug body. When the slide valve 70 is pushed by the plug body 10, the connecting ball 73 escapes from the relief groove 52b and engages with the connecting groove 10e. As a result, the plug body 10 and the slide valve 70 are connected by the connecting ball 73 so that they can be integrally interlocked.

When the plug 2 is further pushed in, as shown in FIG. 10(d), the movable valve 20 resists the biasing force of the spring 40 and moves toward the rear end side of the plug 2 (to the right in FIG. 10) and is fixed. A valve 60 enters the interior of the plug body 10 . Further, while the plug body 10 of the plug 2 and the slide valve 70 of the socket 3 are connected by the connecting ball 73, the slide valve 70 resists the urging force of the spring 80 and moves toward the rear end side of the socket 3 (left side in FIG. 10). , the plug body 10 enters the socket body 50 .

As shown in FIG. 2, when the plug body 10 enters the socket body 50 and the plug outer peripheral groove 10d of the plug body 10 comes to the position of the steel ball 53, the steel ball 53 and the plug outer peripheral groove 10d are engaged. do. When the steel balls 53 and the plug outer peripheral groove 10d are engaged with each other, the sleeve 90 moves toward the distal end of the socket 3 by the biasing force of the spring 91, and presses the steel balls 53 with the inner surface thereof. in the engaged position. As a result, the internal space of the plug body 10 and the internal space of the socket body 50 are communicated with each other to open the flow path. In this state, the seal member 74 seals between the plug body 10 and the slide valve 70 of the socket body 50 .

In order to release the engagement between the plug 2 and the socket 3, first, the sleeve 90 is moved to the rear end side of the socket 3 in FIG. When the sleeve 90 is moved to the rear end side of the socket 3 and the sleeve inner peripheral groove 90a of the sleeve 90 comes to the position of the steel ball 53, the steel ball 53 can be retracted into the sleeve inner peripheral groove 90a of the sleeve 90. The engagement between the steel ball 53 and the plug outer peripheral groove 10d of the plug body 10 is released.

In this state, when the plug 2 and the socket 3 are pulled apart, the state shown in FIG. 10D changes to the state shown in FIG. As a result, the sealing member 23 is in sliding contact with the inner surface of the tip end of the plug body 10 , and the protrusion 21 b is in contact with the valve seat 10 a of the plug body 10 . Also, the slide valve 70 of the socket 3 is biased by the spring 80 so that the projection 71d is in sliding contact with the seal member 63 of the fixed valve 60, and the stepped portion 72g is in contact with the stop ring of the socket body 50 as shown in FIG. 54. As a result, the flow path communicating between the internal space of the plug body 10 and the internal space of the socket body 50 is closed.

Further, when the plug 2 is pulled away from the socket, as shown in FIG. 10(b), the connecting ball 73 escapes from the connecting groove 10e to the relief groove 52b. As a result, as shown in FIG. 10(a), the connection between the slide valve and the socket body is released, and the plug 2 can be separated from the socket 3. Then, as shown in FIG.

In the fluid coupling of this embodiment, the tip of the slide valve 70 extends beyond the steel ball 53 toward the tip of the socket body 50 , and the steel ball 53 is retracted from the inner surface of the socket body 50 . 2 can be connected with one touch without operating the sleeve 90. - 特許庁

Further, since the steel ball 53, the connecting ball 73 as the interlocking means, and the stop ring 54 are arranged in this order from the end face of the plug insertion side of the socket 3, the stop ring 54 is arranged on the back side of the slide valve 70. , the connecting ball 73 can be provided at a position where it can be interlocked with the plug body 10 by bringing the connecting ball 73 close to the steel ball 53 side. As a result, when connecting the plug 2 to the socket 3, it is possible to connect with one touch without operating the sleeve 90, and by interlocking the plug body 10 and the slide valve 70, leakage of the internal fluid to the outside is prevented. Both functions can be prevented.

Here, if the number of connecting balls 73 is one, when the plug 2 is pulled apart, the slide valve 70 inclines, and a force is generated in the direction in which the connecting ball 73 bites into the inner surface of the socket body 50, and the movement of the slide valve 70 is inhibited. It is restricted and resistance is generated in the direction of pulling the plug 2 apart. When there are two connecting balls 73, the probability of tilting of the slide valve 70 decreases, but the same phenomenon as in the case of one connecting ball 73 occurs in the direction in which the connecting ball 73 is not installed. In this embodiment, since the connecting balls 73 are provided at three equal intervals (120° intervals), when the plug 2 is pulled out, the connecting balls 73 bite into the inner peripheral surface of the socket body 50 and the slide valve Since tilting of 70 is prevented, plug 2 can be pulled out reliably and smoothly at minimum cost.

In addition, in the fluid coupling of this embodiment, the fixed valve receiver 64 is retained by the E-shaped ring 65 from the fixed valve 60, and fixed to the socket body 50 simply by sandwiching it between the stepped portion 51f and the stopper 55. can be done. Therefore, it is only necessary to provide the socket body 50 with the step portion 51f and the stopper 55, so that the mounting of the movable valve 20 to the socket body 50 is easy.

Further, the movable valve receiver 34 can be fixed simply by contacting the base portion 31 of the valve holder 30 and the stopper 11 of the plug body 10 . Therefore, it is easy to attach the movable valve 20 to the plug body 10 . In addition, the movable valve receiver 34 can be made to have the same shape as the fixed valve receiver 64, and the manufacturing cost can be reduced by using common parts.

The present invention is not limited to the above embodiments, and can be appropriately modified and changed within the scope of the invention described in the claims.

In the above-described embodiment, the movable valve 20 of the plug 2 is held by the valve holder 30, but the valve holder 30 can be omitted and the spring 40 can be directly held.
For example, as shown in FIG. 11, the rear end of the plug spring 40 is provided with a small diameter portion 40a which is wound with a smaller diameter than the rear end of the plug spring 40, and this small diameter portion 40a is inserted into the hole 34a of the movable valve receiver 34. and hold. The front end face of the movable valve receiver 34 contacts the rear end of the plug spring 40 , and the rear end face contacts the stopper 11 .
According to this embodiment, there is no valve holder 30, and the small-diameter portion 40a of the plug spring 40 that supports the movable valve 20 is directly fixed to the movable valve receiver 34. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced. can.

Further, as shown in FIG. 12, an extension portion 40b is provided at the rear end of the plug spring 40 by extending the winding in the axial direction of the plug spring 40, and the extension portion 40b is inserted into the spring seat 35 to The projection 35a of the seat 35 is inserted into the hole 34a of the movable valve receiver 34 and held. The end face of the movable valve receiver 34 on the front end side contacts the spring seat 35 , and the end face on the rear end side contacts the stopper 11 .
According to this embodiment, there is no valve holder 30, and the extension 40b of the plug spring 40 that supports the movable valve 20 is directly fixed to the movable valve receiver 34 via the spring seat 35, so that the weight is reduced and the manufacturing cost is reduced. can be reduced.

1 Fluid Coupling 2 Plug 3 Socket 10 Plug Main Body 10a Valve Seat 10b Plug Inner Circumferential Groove 10c Female Thread 10d Plug Peripheral Groove 10e Connecting Groove 10f Hex Head 11 Stopper 20 Movable Valve 21 Valve Head 21a Seal Groove 21b Projection 22 Valve Shaft 22a Hole 23 Seal member 30 valve holder 31 base 32 support 33 fixed part 34 movable valve receiver 34a hole 34b base 34c arm 35 spring seat 35a protrusion 40 spring (plug spring)
40a small diameter portion 40b extension portion 50 socket main body 51a first inner diameter portion (tip inner diameter portion)
51b Second inner diameter portion 51c Third inner diameter portion 51d Inclined stepped portion 51e Stepped portion 51f Stepped portion 52a Steel ball holding hole 52b Relief groove 52c Stop ring receiving groove 52d Socket inner peripheral groove 52e Male screw 52f Socket outer peripheral groove 52g Width across flats 53 Steel ball 54 Stop ring 55 Stopper 56 Stop ring 60 Fixed valve 60a Fixed part 61 Valve head 61a Seal groove 62 Valve stem 63 Seal member 64 Fixed valve receiver 65 E-ring 70 Slide valve 71a Taper part 71b Holding hole 71c Seal groove 71d Projection part 72a First outer diameter portion 72b Second outer diameter portion 72c Third outer diameter portion 72d Fourth outer diameter portion 72e Seal groove 72f Stop ring accommodating groove 72g Stepped portion 73 Connection ball 74 Seal member 75 Seal member 80 Spring (socket spring)
90 sleeve 90a sleeve inner peripheral groove 91 spring 95 insertion jig

Claims (8)

comprising a plug and a socket engaging said plug;
The plug is
a cylindrical plug body provided with an outer peripheral groove;
a movable valve provided inside the plug body and movable relative to the plug body in an axial direction;
a plug spring that biases the movable valve toward the distal end of the plug body;
with
The socket is
a cylindrical socket body having a steel ball holding hole on its outer peripheral surface;
a steel ball held in the steel ball holding hole of the socket body so as to protrude inside the socket body and engage with the outer peripheral groove of the plug;
a fixed valve fixed inside the socket body;
a cylindrical slide valve axially movable relative to the fixed valve;
a stop ring that regulates the position of the slide valve so that the slide valve does not protrude from the tip side of the socket body;
a socket spring that biases the slide valve to contact the stop ring;
a sleeve movable between a holding position in which the steel ball protrudes inside the socket body and a retracted position in which the steel ball is retracted from the inside of the socket body, and is urged toward the holding position;
In a fluid coupling comprising
a valve holder for axially slidably holding the movable valve;
A movable valve receiver is provided to fix the valve holder inside the plug body,
The movable valve receiver has a base portion having a hole fitted to the rear end of the valve holder, and a pair of arms extending radially outward from the base portion,
an end face of the base on the tip side abuts against a step formed on the outer peripheral surface of the valve holder;
A fluid coupling , wherein a rear end face of the arm portion is in contact with a stopper provided on an inner peripheral surface of the plug body . comprising a plug and a socket engaging said plug;
The plug is
a cylindrical plug body provided with an outer peripheral groove;
a movable valve provided inside the plug body and movable relative to the plug body in an axial direction;
a plug spring that biases the movable valve toward the distal end of the plug body;
with
The socket is
a cylindrical socket body having a steel ball holding hole on its outer peripheral surface;
a steel ball held in the steel ball holding hole of the socket body so as to protrude inside the socket body and engage with the outer peripheral groove of the plug;
a fixed valve fixed inside the socket body;
a cylindrical slide valve axially movable relative to the fixed valve;
a stop ring that regulates the position of the slide valve so that the slide valve does not protrude from the tip side of the socket body;
a socket spring that biases the slide valve to contact the stop ring;
a sleeve movable between a holding position in which the steel ball protrudes inside the socket body and a retracted position in which the steel ball is retracted from the inside of the socket body, and is urged toward the holding position;
In a fluid coupling comprising
A small-diameter portion having a smaller diameter than the rear end of the plug spring is provided at the rear end of the plug spring,
A movable valve receiver is provided for fixing the small diameter portion of the plug spring inside the plug body,
The movable valve receiver has a base portion having a hole to be fitted into the small diameter portion of the plug spring, and a pair of arm portions extending radially outward from the base portion,
an end surface of the base on the tip side contacts the rear end of the plug spring,
A fluid coupling , wherein a rear end face of the arm portion is in contact with a stopper provided on an inner peripheral surface of the plug body . comprising a plug and a socket engaging said plug;
The plug is
a cylindrical plug body provided with an outer peripheral groove;
a movable valve provided inside the plug body and movable relative to the plug body in an axial direction;
a plug spring that biases the movable valve toward the distal end of the plug body;
with
The socket is
a cylindrical socket body having a steel ball holding hole on its outer peripheral surface;
a steel ball held in the steel ball holding hole of the socket body so as to protrude inside the socket body and engage with the outer peripheral groove of the plug;
a fixed valve fixed inside the socket body;
a cylindrical slide valve axially movable relative to the fixed valve;
a stop ring that regulates the position of the slide valve so that the slide valve does not protrude from the tip side of the socket body;
a socket spring that biases the slide valve to contact the stop ring;
a sleeve movable between a holding position in which the steel ball protrudes inside the socket body and a retracted position in which the steel ball is retracted from the inside of the socket body, and is urged toward the holding position;
In a fluid coupling comprising
an extension extending in the axial direction of the plug spring at the rear end of the plug spring;
a spring seat into which the extended portion of the plug spring is inserted;
A movable valve receiver is provided to fix the spring seat inside the plug body,
The movable valve receiver has a base portion having a hole fitted to the protrusion of the spring seat, and a pair of arms extending radially outward from the base portion,
an end surface of the base on the tip side contacts the spring seat,
A fluid coupling according to claim 1, wherein a rear end face of the arm portion is in contact with a stopper provided on an inner peripheral surface of the plug body . interlocking means for connecting the plug body and the slide valve when the plug is inserted into the socket, and for releasing the connection between the plug body and the slide valve when the plug is removed from the socket; 4. The fluid coupling according to any one of claims 1 to 3, comprising: The interlocking means
a connecting groove provided on the outer peripheral surface of the plug body;
a holding hole provided in the slide valve;
a connecting ball held in the holding hole so as to protrude inside the slide valve and engage with the outer peripheral groove of the plug body;
a relief groove formed on the inner peripheral surface of the socket body for retracting the connecting ball;
with
A stop ring receiving groove having a groove diameter smaller than the outer diameter of the stop ring and receiving the stop ring is provided on the inner peripheral surface of the socket body,
On the plug insertion side of the stop ring receiving groove, there is a tip inner diameter portion having the same inner diameter as the stop ring receiving groove, and an inclined step where the inner diameter decreases from the tip inner diameter portion toward the stop ring receiving groove. provided,
5. A fluid coupling according to claim 4 , wherein said relief groove of said interlocking means is formed in said tip inner diameter portion. 6. The holding holes are provided at three equidistant positions in the circumferential direction of the slide valve, and three connecting balls are provided, each of which is held in each of the holding holes. fluid couplings. 7. A fluid coupling according to claim 5 , wherein a chamfer is provided on the far side edge of said escape groove. 8. The fluid coupling according to any one of claims 5 to 7 , wherein a chamfer is provided at an inner peripheral corner of the stop ring.

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